WO2023282134A1 - Lubricant composition - Google Patents
Lubricant composition Download PDFInfo
- Publication number
- WO2023282134A1 WO2023282134A1 PCT/JP2022/025869 JP2022025869W WO2023282134A1 WO 2023282134 A1 WO2023282134 A1 WO 2023282134A1 JP 2022025869 W JP2022025869 W JP 2022025869W WO 2023282134 A1 WO2023282134 A1 WO 2023282134A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- lubricating oil
- less
- oil composition
- component
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 224
- 239000000314 lubricant Substances 0.000 title abstract 4
- -1 thiadiazole compound Chemical class 0.000 claims abstract description 61
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 28
- 125000004433 nitrogen atom Chemical group N* 0.000 claims abstract description 22
- 239000002199 base oil Substances 0.000 claims abstract description 17
- 239000010687 lubricating oil Substances 0.000 claims description 215
- 125000000217 alkyl group Chemical group 0.000 claims description 45
- 229910052717 sulfur Inorganic materials 0.000 claims description 20
- 125000004434 sulfur atom Chemical group 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 16
- 229910019142 PO4 Inorganic materials 0.000 claims description 14
- 235000021317 phosphate Nutrition 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims description 9
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 8
- 150000001336 alkenes Chemical class 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 6
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 6
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical class [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 claims description 5
- 150000003018 phosphorus compounds Chemical class 0.000 claims description 2
- KZNICNPSHKQLFF-UHFFFAOYSA-N dihydromaleimide Natural products O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 abstract description 6
- 229960002317 succinimide Drugs 0.000 abstract description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 50
- 150000001875 compounds Chemical class 0.000 description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 33
- 229910052802 copper Inorganic materials 0.000 description 33
- 239000010949 copper Substances 0.000 description 33
- 238000010828 elution Methods 0.000 description 30
- 230000003647 oxidation Effects 0.000 description 23
- 238000007254 oxidation reaction Methods 0.000 description 23
- 239000003921 oil Substances 0.000 description 21
- 125000003342 alkenyl group Chemical group 0.000 description 17
- 238000012360 testing method Methods 0.000 description 15
- 239000003599 detergent Substances 0.000 description 13
- 230000002401 inhibitory effect Effects 0.000 description 12
- 239000000654 additive Substances 0.000 description 11
- 125000002947 alkylene group Chemical group 0.000 description 10
- 239000003963 antioxidant agent Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 10
- 239000002480 mineral oil Substances 0.000 description 9
- 125000003118 aryl group Chemical group 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000003607 modifier Substances 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 7
- 239000000194 fatty acid Substances 0.000 description 7
- 229930195729 fatty acid Natural products 0.000 description 7
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 7
- 230000003078 antioxidant effect Effects 0.000 description 6
- 239000002585 base Substances 0.000 description 6
- 239000002270 dispersing agent Substances 0.000 description 6
- 239000006078 metal deactivator Substances 0.000 description 6
- 235000010446 mineral oil Nutrition 0.000 description 6
- 239000010452 phosphate Substances 0.000 description 6
- 125000004437 phosphorous atom Chemical group 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 239000004711 α-olefin Substances 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 4
- 125000004429 atom Chemical group 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010779 crude oil Substances 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 125000000962 organic group Chemical group 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 150000002430 hydrocarbons Chemical group 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000013112 stability test Methods 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 101100208720 Homo sapiens USP5 gene Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 102100021017 Ubiquitin carboxyl-terminal hydrolase 5 Human genes 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 125000006267 biphenyl group Chemical group 0.000 description 2
- 125000004369 butenyl group Chemical group C(=CCC)* 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000004517 catalytic hydrocracking Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000003493 decenyl group Chemical group [H]C([*])=C([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000012208 gear oil Substances 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000006038 hexenyl group Chemical group 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- KHYKFSXXGRUKRE-UHFFFAOYSA-J molybdenum(4+) tetracarbamodithioate Chemical compound C(N)([S-])=S.[Mo+4].C(N)([S-])=S.C(N)([S-])=S.C(N)([S-])=S KHYKFSXXGRUKRE-UHFFFAOYSA-J 0.000 description 2
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 125000005187 nonenyl group Chemical group C(=CCCCCCCC)* 0.000 description 2
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000002255 pentenyl group Chemical group C(=CCCC)* 0.000 description 2
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- 150000003014 phosphoric acid esters Chemical class 0.000 description 2
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 2
- 150000004867 thiadiazoles Chemical group 0.000 description 2
- 125000005040 tridecenyl group Chemical group C(=CCCCCCCCCCCC)* 0.000 description 2
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000005065 undecenyl group Chemical group C(=CCCCCCCCCC)* 0.000 description 2
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- BXRRILFCEKZKPU-UHFFFAOYSA-N 2,5-bis(2-methyloctan-2-yldisulfanyl)-1,3,4-thiadiazole Chemical compound CCCCCCC(C)(C)SSC1=NN=C(SSC(C)(C)CCCCCC)S1 BXRRILFCEKZKPU-UHFFFAOYSA-N 0.000 description 1
- DKCPKDPYUFEZCP-UHFFFAOYSA-N 2,6-di-tert-butylphenol Chemical compound CC(C)(C)C1=CC=CC(C(C)(C)C)=C1O DKCPKDPYUFEZCP-UHFFFAOYSA-N 0.000 description 1
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 description 1
- NBPOOCGXISZKSX-UHFFFAOYSA-N 6-methylheptyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)CCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NBPOOCGXISZKSX-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical class 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- CZPWVGJYEJSRLH-UHFFFAOYSA-N Pyrimidine Chemical compound C1=CN=CN=C1 CZPWVGJYEJSRLH-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- XYRMLECORMNZEY-UHFFFAOYSA-B [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S Chemical compound [Mo+4].[Mo+4].[Mo+4].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S XYRMLECORMNZEY-UHFFFAOYSA-B 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 125000004450 alkenylene group Chemical group 0.000 description 1
- 125000002877 alkyl aryl group Chemical group 0.000 description 1
- 229940045714 alkyl sulfonate alkylating agent Drugs 0.000 description 1
- 150000008052 alkyl sulfonates Chemical class 0.000 description 1
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 description 1
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000000732 arylene group Chemical group 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- AVVIDTZRJBSXML-UHFFFAOYSA-L calcium;2-carboxyphenolate;dihydrate Chemical compound O.O.[Ca+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O AVVIDTZRJBSXML-UHFFFAOYSA-L 0.000 description 1
- ZMRQTIAUOLVKOX-UHFFFAOYSA-L calcium;diphenoxide Chemical compound [Ca+2].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 ZMRQTIAUOLVKOX-UHFFFAOYSA-L 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- 125000005724 cycloalkenylene group Chemical group 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000002993 cycloalkylene group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical class C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 125000005982 diphenylmethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000010696 ester oil Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000004464 hydroxyphenyl group Chemical group 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical class O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 125000005064 octadecenyl group Chemical group C(=CCCCCCCCCCCCCCCCC)* 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920013636 polyphenyl ether polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003873 salicylate salts Chemical class 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
- C10M133/16—Amides; Imides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
- C10M133/56—Amides; Imides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/32—Heterocyclic sulfur, selenium or tellurium compounds
- C10M135/36—Heterocyclic sulfur, selenium or tellurium compounds the ring containing sulfur and carbon with nitrogen or oxygen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M139/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/14—Metal deactivation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/30—Refrigerators lubricants or compressors lubricants
Definitions
- the present invention relates to a lubricating oil composition, a speed reducer, and the use of the lubricating oil composition.
- Lubricating oil compositions are used in these mechanisms, and lubricating oil compositions that can meet various demands have been developed.
- Patent Document 1 for the purpose of providing a gear oil composition having both fuel-saving performance and sufficient durability of gears, bearings, etc., a low-viscosity mineral oil-based lubricating base oil and a high-viscosity solvent-refined mineral oil are disclosed.
- a gear oil composition is disclosed in which zinc dialkyldithiophosphate and an alkaline earth metal-based detergent are blended in predetermined blending amounts in a base oil obtained by blending a base lubricating oil in a predetermined proportion.
- lubricating oil compositions used in various devices are required to have properties such as scuffing resistance, copper elution inhibitory effect, oxidation stability, etc. depending on the mode of the device, in addition to insulating properties.
- properties such as scuffing resistance, copper elution inhibitory effect, oxidation stability, etc. depending on the mode of the device, in addition to insulating properties.
- a new lubricating oil composition having characteristics suitable for lubrication according to various mechanisms incorporated in the device (for example, scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties) is required. ing.
- the present invention contains a thiadiazole-based compound and a boron-modified alkenylsuccinimide together with a base oil, and the content of the thiadiazole-based compound and the content of boron atoms and nitrogen atoms derived from the boron-modified alkenylsuccinimide is adjusted to a predetermined range.
- the present invention provides a lubricating oil composition, a speed reducer, and use of the lubricating oil composition according to the following aspects [1] to [14].
- a lubricating oil composition containing a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C),
- the content of component (B) is less than 0.60% by mass based on the total amount of the lubricating oil composition
- the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in mass ratio
- the content of boron atoms derived from the component (C) is 300 mass ppm or less based on the total amount of the lubricating oil composition.
- lubricating oil composition lubricating oil composition.
- a preferred embodiment of the lubricating oil composition of the present invention is a lubricating oil composition having properties suitable for various mechanisms incorporated in a device, and a more preferred aspect of the lubricating oil composition is scuffing resistance , copper elution inhibitory effect, oxidation stability, and insulating properties can be improved in a well-balanced manner. Therefore, these lubricating oil compositions can be suitably used for lubricating speed reducers and the like.
- the upper and lower limits can be combined arbitrarily.
- the numerical range is described as “preferably 30 to 100, more preferably 40 to 80”
- the range of "30 to 80” and the range of "40 to 100” are also described in this specification. included in the specified numerical range.
- the numerical range is described as “preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less”
- “30 to 80” Ranges and ranges from “40 to 100” are also included in the numerical ranges described herein.
- “60 to 100” means a range of "60 or more and 100 or less”.
- kinematic viscosity and viscosity index mean values measured or calculated according to JIS K2283:2000.
- the content of boron atoms and phosphorus atoms means values measured according to JPI-5S-38-92.
- the content of nitrogen atoms means a value measured according to JIS K2609.
- the sulfur atom content means a value measured according to JIS K2541-6:2013.
- a lubricating oil composition of one aspect of the present invention comprises a base oil (A) (hereinafter also referred to as “component (A)”), a thiadiazole compound (hereinafter also referred to as “component (B)”), and a boron-modified alkenyl It contains succinimide (hereinafter also referred to as “component (C)").
- component (A) base oil
- component (B) thiadiazole compound
- component (C) boron-modified alkenyl It contains succinimide
- scuffing is more likely to occur in lubricating oil compositions with lower kinematic viscosities.
- a lubricating oil composition having a low kinematic viscosity exhibits a decrease in volume resistivity, which poses a problem in terms of insulating properties.
- the present inventors have found that scuffing resistance is improved by using a lubricating oil composition containing a thiadiazole compound, but at the same time, new problems such as an increase in the amount of copper elution and a decrease in oxidation stability occur. I also know it happens.
- a lubricating oil composition containing a boron-modified alkenyl succinimide together with a thiadiazole-based compound.
- a lubricating oil composition having well-balanced improved properties such as insulating properties can be obtained.
- a lubricating oil composition according to one aspect of the present invention was made based on this finding.
- the lubricating oil composition of one aspect of the present invention further includes one or more phosphorus-based compounds selected from phosphates and phosphites (D ) (hereinafter also referred to as “component (D)”).
- component (D) phosphorus-based compounds selected from phosphates and phosphites
- the lubricating oil composition of one aspect of the present invention may further contain various additives other than components (B) to (D), if necessary, as long as the effects of the present invention are not impaired.
- the total content of components (A), (B) and (C) is based on the total amount (100% by mass) of the lubricating oil composition, preferably 50% by mass above, more preferably 60% by mass or more, still more preferably 70% by mass or more, even more preferably 75% by mass or more, particularly preferably 80% by mass or more, and further 85% by mass or more, 90% by mass or more, or It may be 92% by mass or more, and 100% by mass or less, 99.5% by mass or less, 99.0% by mass or less, 98.5% by mass or less, 98.0% by mass or less, 97.5% by mass or less, It may be 97.0% by mass or less, 96.5% by mass or less, or 96.0% by mass or less.
- the total content of components (A), (B), (C) and (D) is based on the total amount (100% by mass) of the lubricating oil composition, preferably is more than 50% by mass, more preferably more than 60% by mass, more preferably more than 70% by mass, even more preferably more than 75% by mass, particularly preferably more than 80% by mass, and more than 83% by mass, 85% by mass %, 87% by mass, 90% by mass, 92% by mass, or 94% by mass or more, and 100% by mass or less, 99.9% by mass or less, 99.5% by mass or less, 99.5% by mass or less.
- the base oil which is the component (A) used in one aspect of the present invention, includes one or more selected from mineral oils and synthetic oils.
- Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oils, intermediate crude oils, and naphthenic crude oils; distillates obtained by vacuum distillation of these atmospheric residual oils. refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining (hydrocracking); etc.
- Synthetic oils include, for example, ⁇ -olefin homopolymers, or ⁇ -olefin copolymers (for example, ⁇ -olefin copolymers having 8 to 14 carbon atoms such as ethylene- ⁇ -olefin copolymers).
- Synthetic oil (GTL) obtained by isomerizing the manufactured wax (GTL wax (Gas To Liquids WAX)) and the like can be mentioned.
- the component (A) used in one aspect of the present invention preferably contains one or more selected from mineral oils classified into Group II and Group III of the API (American Petroleum Institute) base oil category, and synthetic oils.
- the kinematic viscosity at 100° C. of component (A) used in one embodiment of the present invention is preferably 1.9 mm 2 /s or higher, more preferably 2.0 mm 2 /s or higher, and more preferably 2.1 mm 2 /s or higher.
- 2.2 mm 2 /s or more more preferably 2.3 mm 2 /s or more, 2.5 mm 2 /s or more, 2.7 mm 2 /s or more, 2.9 mm 2 /s or more; 0 mm 2 /s or more, 3.2 mm 2 /s or more, 3.4 mm 2 /s or more, or 3.6 mm 2 /s or more, preferably 5.0 mm 2 /s or less, more preferably 4 0.8 mm 2 /s or less, more preferably 4.6 mm 2 /s or less, still more preferably 4.5 mm 2 /s or less, even more preferably 4.3 mm 2 /s or less, particularly preferably 4.2 mm 2 /s 4.0 mm 2 /s or less, 3.8 mm 2 /s or less, 3.7 mm 2 /s or less, 3.6 mm 2 /s or less, 3.5 mm 2 /s or less, 3.4 mm 2 /s or less, 3.3 mm
- the viscosity index of component (A) used in one aspect of the present invention is preferably 70 or higher, more preferably 80 or higher, even more preferably 90 or higher, and even more preferably 100 or higher.
- the kinematic viscosity and viscosity index of the mixed oil are preferably within the above ranges. Therefore, a low-viscosity base oil and a high-viscosity base oil may be used together to prepare the mixed oil so that the kinematic viscosity and the viscosity index are within the above ranges.
- the content of component (A) is preferably 45% by mass or more, more preferably 50% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. , More preferably 55% by mass or more, still more preferably 60% by mass or more, even more preferably 65% by mass or more, particularly preferably 70% by mass or more, and further 75% by mass or more, 80% by mass or more, 85% by mass % or more, 90% by mass or more, or 92% by mass or more, preferably 99.99% by mass or less, more preferably 99.90% by mass or less, more preferably 99.50% by mass or less, and still more preferably is 99.00% by mass or less, more preferably 98.50% by mass or less, particularly preferably 98.00% by mass or less, and further 97.50% by mass or less, 97.00% by mass or less, 96.50 % by mass or less, or 96.00% by mass or less.
- the lubricating oil composition of one aspect of the present invention can be a lubricating oil composition with improved scuffing resistance by containing a thiadiazole-based compound as the component (B).
- the scuffing resistance-improving effect of component (B) can be more effectively exhibited even in a lubricating oil composition with a low viscosity.
- Component (B) may be used alone or in combination of two or more. However, the component (B) also causes an increase in copper elution and a decrease in oxidation stability.
- the content of component (B) is limited to less than 0.60% by mass based on the total amount (100% by mass) of the lubricating oil composition. That is, a lubricating oil composition having a component (B) content of 0.60% by mass or more tends to cause an increase in copper elution and a decrease in oxidation stability.
- the content of the component (B) is the total amount of the lubricating oil composition ( 100% by mass), it is less than 0.60% by mass, preferably 0.57% by mass or less, more preferably 0.55% by mass or less, more preferably 0.52% by mass or less, more preferably 0.52% by mass or less.
- the content of the component (B) is the total amount of the lubricating oil composition (100 mass %) basis, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, more preferably 0.07% by mass or more, more preferably 0.10% by mass or more, still more preferably 0.12% by mass % by mass or more, more preferably 0.15% by mass or more, still more preferably 0.17% by mass or more, even more preferably 0.20% by mass or more, particularly preferably 0.22% by mass or more, and 0 0.23% by mass or more, 0.24% by mass or more, 0.25% by mass or more, 0.26% by mass or more, 0.27% by mass or more, or 0.28% by mass or more.
- the content of component (B) in terms of sulfur atoms is based on the total amount (100% by mass) of the lubricating oil composition, lubrication with further improved scuffing resistance
- an oil composition preferably 30 mass ppm or more, more preferably 50 mass ppm or more, more preferably 100 mass ppm or more, more preferably 150 mass ppm or more, still more preferably 200 mass ppm or more, still more preferably 250 mass ppm or more, more preferably 300 mass ppm or more, still more preferably 400 mass ppm or more, particularly preferably 500 mass ppm or more, further 600 mass ppm or more, 650 mass ppm or more, 700 mass ppm or more, 750 mass ppm or more It may be mass ppm or more, 800 mass ppm or more, 850 mass ppm or more, 900 mass ppm or more, 950 mass ppm or more, or 1000 mass
- a product preferably 2500 mass ppm or less, more preferably 2000 mass ppm or less, more preferably 1900 mass ppm or less, more preferably 1800 mass ppm or less, still more preferably 1700 mass ppm or less, still more preferably 1600 mass ppm ppm or less, more preferably 1500 mass ppm or less, even more preferably 1400 mass ppm or less, particularly preferably 1300 mass ppm or less, further 1250 mass ppm or less, 1200 mass ppm or less, 1150 mass ppm or less, 1100 mass ppm or less, or 1050 mass ppm or less.
- the content of component (B) in terms of nitrogen atoms is based on the total amount (100% by mass) of the lubricating oil composition, lubrication with further improved scuffing resistance
- an oil composition preferably 10 mass ppm or more, more preferably 30 mass ppm or more, more preferably 50 mass ppm or more, more preferably 60 mass ppm or more, still more preferably 70 mass ppm or more, still more preferably 80 mass ppm or more, more preferably 90 mass ppm or more, even more preferably 100 mass ppm or more, particularly preferably 120 mass ppm or more, further 130 mass ppm or more, 140 mass ppm or more, 150 mass ppm or more, 160 It may be mass ppm or more, 170 mass ppm or more, 180 mass ppm or more, or 190 mass ppm or more, and from the viewpoint of a lubricating oil composition with good copper el
- the thiadiazole-based compound that is the component (B) used in one embodiment of the present invention may be any compound having a thiadiazole ring. It preferably contains a compound represented by any one of (b-1) to (b-4), and more preferably contains at least a compound represented by the following general formula (b-1). In addition, the component (B) may be used alone or in combination of two or more.
- R 1 and R 2 are each independently a hydrocarbon group.
- m and n are each independently an integer of 1 to 10, but from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, preferably an integer of 1 to 6, more preferably 1 to 4 is an integer of , more preferably an integer of 2 to 3, and even more preferably 2.
- the hydrocarbon groups that can be selected as R 1 and R 2 include, for example, methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group, isobutyl group), pentyl group, hexyl group, heptyl group, octyl group, 2-ethylhexyl group, nonyl group, 1,1-dimethylheptyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl linear or branched alkyl groups such as pentadecyl, hexadecyl, heptadecyl and octadecyl groups; ethenyl, propenyl, butenyl, pentenyl, hexenyl, hepten
- the number of carbon atoms in the hydrocarbon group that can be selected as R 1 and R 2 is preferably 1 or more, more preferably 2 or more, and still more preferably 3 or more, more preferably 5 or more, and may be 7 or more, 8 or more, or 9 or more, preferably 30 or less, more preferably 24 or less, more preferably 20 or less, more preferably 18 Below, more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, and may be 11 or less, or 10 or less.
- R 1 and R 2 are each independently preferably an alkyl group from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, and together with scuffing resistance, copper corrosion prevention from the viewpoint of obtaining a lubricating oil composition capable of effectively suppressing the elution of copper by improving the branched-chain alkyl group, more preferably a branched-chain alkyl group having 5 or more carbon atoms.
- the number of carbon atoms in the branched alkyl group is preferably 5 or more, more preferably 7 or more, still more preferably 8 or more, still more preferably 9 or more, and preferably 30 or less. It is preferably 24 or less, more preferably 20 or less, more preferably 18 or less, still more preferably 16 or less, even more preferably 14 or less, still more preferably 12 or less, and may be 11 or less, or 10 or less.
- the total content of the compounds is based on the total amount (100% by mass) of component (B) contained in the lubricating oil composition, preferably 60 to 100% by mass, more preferably 70 to 100% by mass, still more preferably 80 ⁇ 100% by mass, more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass.
- the content of the compound represented by the general formula (b-1) is the total amount of the component (B) contained in the lubricating oil composition (100 %), preferably 50 to 100% by mass, more preferably 60 to 100% by mass, still more preferably 70 to 100% by mass, even more preferably 80 to 100% by mass, particularly preferably 90 to 100% by mass is.
- the content of the compound represented by the following general formula (bx) is the total amount of the component (B) contained in the lubricating oil composition (100 mass% ) basis, preferably less than 10% by mass, more preferably less than 8% by mass, even more preferably less than 5% by mass, even more preferably less than 3% by mass, and particularly preferably less than 1% by mass.
- R a is a hydrogen atom or a methyl group
- R b is an alkyl group having 1 to 4 carbon atoms.
- p is 0 or 1;
- the component (B) has a branched chain alkyl group from the viewpoint of further improving the scuffing resistance and providing a lubricating oil composition having a good effect of suppressing copper elution. It preferably contains a thiadiazole compound (B1) (hereinafter also referred to as "component (B1)").
- component (B1) thiadiazole compound
- the content of component (B1) is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, based on the total amount (100% by mass) of component (B) contained in the lubricating oil composition. %, more preferably 70 to 100% by mass, still more preferably 80 to 100% by mass, even more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass.
- the number of carbon atoms in the branched alkyl group of the component (B1) is preferably 5 or more, more preferably 7, from the viewpoint of improving scuffing resistance and providing a lubricating oil composition having a good effect of suppressing copper elution. More preferably 8 or more, still more preferably 9 or more, preferably 30 or less, more preferably 24 or less, more preferably 20 or less, more preferably 18 or less, still more preferably 16 or less, still more preferably is 14 or less, more preferably 12 or less, and may be 11 or less, or 10 or less.
- the component (B1) is represented by any one of the general formulas (b-1) to (b-4).
- R 1 and R 2 in each formula are each independently a branched alkyl group, preferably a compound represented by the general formula (b-1), wherein R 1 and R 2 in the formula More preferred are compounds in which each R 2 is independently a branched alkyl group.
- the preferred range of the number of carbon atoms in the branched-chain alkyl group is as described above.
- the lubricating oil composition of one aspect of the present invention may contain a sulfurized olefin within a range that does not impair the effects of the present invention.
- a sulfurized olefin within a range that does not impair the effects of the present invention.
- it is preferable that the content of the sulfide olefin is as small as possible.
- the content of the sulfurized olefin is preferably less than 0.20% by mass, more preferably less than 0.20% by mass, based on the total amount (100% by mass) of the lubricating oil composition less than 0.18% by mass, more preferably less than 0.15% by mass, even more preferably less than 0.12% by mass, even more preferably less than 0.10% by mass, particularly preferably less than 0.07% by mass; Furthermore, it may be less than 0.05% by weight, less than 0.04% by weight, less than 0.03% by weight, less than 0.02% by weight, less than 0.01% by weight, or less than 0.001% by weight.
- sulfurized olefins include compounds represented by the following general formula (i).
- R-(S) q -R' (i) In the above formula (i), R is an alkenyl group having 2 to 20 carbon atoms, R' is an alkenyl group having 2 to 20 carbon atoms or an alkyl group having 2 to 20 carbon atoms, and q is 1 to 10 is an integer of
- a lubricating oil composition of one aspect of the present invention contains a boron-modified alkenylsuccinimide as component (C).
- component (B) contributes to the improvement of scuffing resistance, but at the same time causes an increase in copper elution and a decrease in oxidation stability. Therefore, in the lubricating oil composition of one aspect of the present invention, by containing the component (C) together with the component (B), excellent scuffing resistance is exhibited, and the effect of suppressing copper elution and oxidation stability are excellent. It is a lubricating oil composition.
- component (C) may be used independently and may use 2 or more types together.
- component (C) satisfies the following requirements (I) and (II).
- a lubricating oil composition having a content ratio [B/N] of less than 0.35 is inferior in copper elution inhibitory effect and oxidation stability.
- a lubricating oil composition having a boron atom content of more than 300 ppm by mass derived from component (C) is inferior in scuffing resistance and insulating properties.
- the content ratio of boron atoms and nitrogen atoms derived from the component (C) [B/N] is a mass ratio of 0.35 or more, preferably 0.40 or more, more preferably 0.45 or more, more preferably 0.50 or more, more preferably 0.50 or more, as in the above requirement (I) is 0.55 or more, more preferably 0.60 or more, more preferably 0.65 or more, still more preferably 0.70 or more, even more preferably 0.75 or more, particularly preferably 0.80 or more, and further , 0.85 or more, or 0.90 or more.
- the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 2.0 or less, 1.9 or less, 1.8 or less, 1.7 or less, 1 .6 or less, 1.5 or less, 1.4 or less, or 1.3 or less.
- the content of boron atoms derived from the component (C) is the lubricating oil composition Based on the total amount (100% by mass) of the product, it is 300 mass ppm or less, preferably 280 mass ppm or less, more preferably 250 mass ppm or less, more preferably 220 mass ppm or less, more preferably 200 mass ppm or less, and further Preferably 180 mass ppm or less, more preferably 160 mass ppm or less, still more preferably 150 mass ppm or less, even more preferably 140 mass ppm or less, particularly preferably 130 mass ppm or less, and further 125 mass ppm or less, 120 It may be mass ppm or less, 115 mass ppm or less, or 110 mass ppm or less.
- the content of boron atoms derived from the component (C) is based on the total amount (100% by mass) of the lubricating oil composition.
- preferably 3.0 mass ppm or more more preferably 5.0 mass ppm or more, more preferably 7.0 mass ppm or more, more preferably 10.0 mass ppm or more, still more preferably 12.0 mass ppm or more, More preferably 15.0 mass ppm or more, still more preferably 17.0 mass ppm or more, still more preferably 20.0 mass ppm or more, particularly preferably 22.0 mass ppm or more, and further preferably 25.0 mass ppm Above, 30.0 mass ppm or more, 35.0 mass ppm or more, 40.0 mass ppm or more, 45.0 mass ppm or more, 50.0 mass ppm or more, 55.0 mass ppm or more, 60.0 mass ppm or more , 65.0 mass ppm or more, 70.0 mass ppm or more, or 75.0 mass ppm or more.
- the scuffing resistance and insulation properties are better maintained, and from the viewpoint of a lubricating oil composition having an excellent copper elution inhibitory effect and oxidation stability, the component (C)
- the content of nitrogen atoms derived is preferably 5.0 mass ppm or more, more preferably 7.0 mass ppm or more, more preferably 9.0 mass ppm, based on the total amount (100 mass%) of the lubricating oil composition ppm or more, more preferably 10.0 mass ppm or more, still more preferably 12.0 mass ppm or more, still more preferably 15.0 mass ppm or more, still more preferably 17.0 mass ppm or more, still more preferably 20.0 mass ppm or more Mass ppm or more, particularly preferably 22.0 mass ppm or more, further 25.0 mass ppm or more, 30.0 mass ppm or more, 35.0 mass ppm or more, 40.0 mass ppm or more, 45.0 mass
- Component (C) used in one aspect of the present invention includes one or more selected from boron-modified alkenylsuccinic acid bisimide (C1) and boron-modified alkenylsuccinic acid monoimide (C2).
- the component (C) used in one aspect of the present invention is a boron-modified alkenylsuccinic acid bisimide ( C1) is preferably included.
- the content of component (C1) is preferably 20 to 100% by mass, more preferably 40 to 100% by mass, based on the total amount (100% by mass) of component (C) contained in the lubricating oil composition. %, more preferably 50 to 100% by mass, still more preferably 60 to 100% by mass, still more preferably 70 to 100% by mass, even more preferably 80 to 100% by mass, particularly preferably 90 to 100% by mass.
- component (C1) examples include boron-modified compounds of the compounds represented by the general formula (c-1). Further, the component (C2) includes a boron-modified compound of the compound represented by the general formula (c-2).
- R a1 , R a2 and R a3 are each independently an alkenyl group having a weight average molecular weight (Mw) of 500 to 3000 (preferably 900 to 2500). is.
- alkenyl groups that can be selected as R a1 , R a2 and R a3 include polybutenyl groups, polyisobutenyl groups, ethylene-propylene copolymers, etc. Among these, polybutenyl groups and polyisobutenyl groups are preferred.
- R b1 , R b2 and R b3 are each independently an alkylene group having 2 to 5 carbon atoms.
- z1 is an integer of 0-10, preferably an integer of 1-4, more preferably 2 or 3.
- z2 is an integer of 1-10, preferably an integer of 2-5, more preferably 3 or 4;
- the lubricating oil composition of one aspect of the present invention may contain an ashless dispersant other than component (C) within a range that does not impair the effects of the present invention.
- ashless dispersants other than component (C) include non-boron-modified alkenyl succinimides and modified alkenyl succinimides other than boron.
- non-boron-modified alkenylsuccinimide include alkenylsuccinic acid bisimide represented by the general formula (c-1) and alkenylsuccinic acid monoimide represented by the general formula (c-2). be done.
- Modified products of alkenylsuccinimide other than boron include, for example, compounds represented by the general formula (c-1) or (c-2), alcohols, aldehydes, ketones, alkylphenols, cyclic carbonates, epoxy compounds, and a reaction product obtained by reacting with one or more selected from organic acids and the like.
- the content of the ashless dispersant other than the component (C) is 10.0% by mass or less based on the total amount (100% by mass) of the lubricating oil composition; 0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, 1.0% by mass or less, 0.7 % by mass or less, 0.5% by mass or less, 0.3% by mass or less, 0.2% by mass or less, or 0.1% by mass or less, or 0% by mass or more, 0.001% by mass or more, Alternatively, it may be 0.01% by mass or more.
- the lubricating oil composition of one aspect of the present invention further includes one or more phosphorus-based compounds selected from phosphates and phosphites (D ) is preferably contained.
- the phosphate ester used as the component (D) in one aspect of the present invention includes, for example, a neutral phosphate ester represented by the following general formula (d-1), and the following general formula (d-2) or (d -3) and acidic phosphate esters.
- examples of the phosphite used as the component (D) in one aspect of the present invention include acidic phosphites represented by the following general formula (d-4) or (d-5).
- each R A is independently an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkyl group having 1 to 6 carbon atoms and optionally substituted with an alkyl group having 6 to 18 carbon atoms.
- a plurality of R A may be the same or different from each other.
- alkyl group examples include methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group , isobutyl group), pentyl group, hexyl group, 2-ethylhexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl, tetradecyl group, hexadecyl group, octadecyl group and the like.
- alkyl groups may be straight-chain alkyl groups or branched-chain alkyl groups.
- the number of carbon atoms in the alkyl group is 1 to 30, preferably 3 to 20, more preferably 5 to 16, even more preferably 6 to 14, still more preferably 8 to 12.
- alkenyl group examples include ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, octadecenyl group and the like.
- These alkenyl groups may be straight-chain alkenyl groups or branched-chain alkenyl groups.
- the alkenyl group has 2 to 20 carbon atoms, preferably 3 to 16 carbon atoms, more preferably 6 to 12 carbon atoms.
- Examples of the aryl group that can be selected as RA include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a biphenyl group, a terphenyl group, and a phenylnaphthyl group, with a phenyl group being preferred.
- the "alkyl group having 1 to 6 carbon atoms" which can be substituted on these aryl groups includes alkyl groups having 1 to 6 carbon atoms among the alkyl groups described above.
- R A01 is a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms.
- RA02 is a divalent organic group.
- x is an integer of 1 or more, preferably an integer of 1 to 10, more preferably an integer of 1 to 5, still more preferably an integer of 1 to 3, even more preferably 1 or 2, particularly preferably 1. * indicates the binding position.
- the alkyl group that can be selected as RA01 may be a straight-chain alkyl group or a branched-chain alkyl group, but is preferably a straight-chain alkyl group.
- the alkyl group has 1 to 20 carbon atoms, preferably 2 to 18 carbon atoms, more preferably 4 to 16 carbon atoms, still more preferably 6 to 12 carbon atoms, and even more preferably 8 to 10 carbon atoms.
- Examples of the divalent organic group that can be selected as R A02 include an alkylene group having 1 to 20 carbon atoms, a cycloalkylene group, an alkenylene group having 1 to 20 carbon atoms, a cycloalkenylene group, an arylene group, and the like.
- an alkylene group having 1 to 20 carbon atoms, or at least one —CH 2 — structure of an alkylene group having 1 to 20 carbon atoms (preferably 2 to 12, more preferably 2 to 8, and even more preferably 2 to 4) Is preferably a group substituted with -O-, -S-, -COO-, -OCO-, -CSO-, -OCS-, -CH CH- or -C ⁇ C-, and the number of carbon atoms 2 to 20 alkylene groups are more preferred.
- the alkylene group that can be selected as R A02 may be a linear alkylene group or a branched alkylene group, but is preferably a linear alkylene group.
- the number of carbon atoms in the alkylene group is 1 to 20, preferably 1 to 12, more preferably 1 to 8, still more preferably 1 to 4, even more preferably 1, 2 or 4, particularly preferably 2.
- the component (D) is a sulfur atom-containing phosphate and a sulfur atom-containing phosphite. It is preferable to contain one or more selected sulfur-phosphorus compounds (D1).
- the content of the component (D1) is the component (D) contained in the lubricating oil composition Based on the total amount (100% by mass), preferably 60 to 100% by mass, more preferably 70 to 100% by mass, more preferably 80 to 100% by mass, still more preferably 90 to 100% by mass, still more preferably 95 to 100% by mass, particularly preferably 98 to 100% by mass.
- sulfur atom-containing phosphates and sulfur atom-containing phosphites examples include sulfur atom-containing phosphates and sulfur atom-containing phosphites having a group represented by the formula (ii).
- the component (D1) used in one embodiment of the present invention is a sulfur atom-containing phosphite having a group represented by the formula (ii). More preferably, one or more selected from a compound (D11) represented by the following general formula (d-11) and a compound (D12) represented by the following general formula (d-12) is more preferred.
- R A11 , R A21 and R A22 are each independently a hydrogen atom or an alkyl group having 1 to 20 carbon atoms.
- the alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group, but is preferably a straight-chain alkyl group.
- the alkyl group has 1 to 20 carbon atoms, preferably 2 to 18 carbon atoms, more preferably 4 to 16 carbon atoms, still more preferably 6 to 12 carbon atoms, and even more preferably 8 to 10 carbon atoms.
- a1, a2 and a3 are each independently an integer of 1 to 20, preferably an integer of 1 to 12, more preferably an integer of 1 to 8, still more preferably an integer of 1 to 4, and more Preferably 1, 2 or 4, particularly preferably 2.
- the component (D) is a compound (D11) represented by the general formula (d-11) ) and the compound (D12) represented by the general formula (d-12).
- the content ratio of compound (D11) and compound (D12) [(D11)/(D12)] is preferably 1/20 to 20/1, more preferably 1/16 to 10/1, more preferably 1/14 to 5/1, more preferably 1/12 to 2/1, even more preferably 1/11 to 1/1, particularly preferably 1/10 to 1 /2.
- the acidic phosphate and acidic phosphite used as the component (D) in one aspect of the present invention may be in the form of an amine salt.
- the amine that forms the amine salt is preferably a compound represented by the following general formula (di).
- the said amine may be used individually and may use 2 or more types together.
- r is an integer of 1 to 3, preferably 1.
- Each R x is independently an alkyl group having 6 to 18 carbon atoms, an alkenyl group having 6 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, or a hydroxyalkyl group having 6 to 18 carbon atoms.
- the plurality of R x may be the same or different from each other.
- the alkyl group having 6 to 18 carbon atoms, the alkenyl group having 6 to 18 carbon atoms and the aryl group having 6 to 18 carbon atoms which can be selected as R x include the above R 11 to R 13 and R 21 to R 23 Among the groups exemplified as alkyl groups, alkenyl groups, and aryl groups that can be selected as , groups having the number of carbon atoms within the above range can be mentioned.
- Examples of the hydroxyalkyl group having 6 to 18 carbon atoms include a group in which the hydrogen atom of an alkyl group having 6 to 18 carbon atoms is substituted with a hydroxy group. Specifically, hydroxyhexyl group and hydroxyoctyl group. , hydroxydodecyl group, hydroxytridecyl group and the like.
- the content of the component (D) is the total amount (100% by mass) of the lubricating oil composition Based on, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.07% by mass or more, even more preferably 0.10% by mass or more, particularly preferably 0.15% by mass % or more, and further 0.17% by mass or more, 0.20% by mass or more, 0.23% by mass or more, 0.25% by mass or more, 0.27% by mass or more, or 0.30% by mass or more Also preferably 3.0% by mass or less, more preferably 2.5% by mass or less, still more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, and particularly preferably 1.5% by mass or less.
- the content of component (D) in terms of phosphorus atoms is the total amount of the lubricating oil composition (100% by mass), preferably 30 mass ppm or more, more preferably 50 mass ppm or more, more preferably 70 mass ppm or more, more preferably 100 mass ppm or more, still more preferably 120 mass ppm or more, still more preferably 150 mass ppm or more, more preferably 180 mass ppm or more, still more preferably 200 mass ppm or more, still more preferably 220 mass ppm or more, still more preferably 250 mass ppm or more, particularly preferably 270 mass ppm or more, Further, it is preferably 800 mass ppm or less, more preferably 700 mass ppm or less, still more preferably 600 mass ppm or less, still more preferably 500 mass ppm or less, particularly preferably 450 mass ppm or less
- the content of component (D) in terms of sulfur atoms is the total amount of the lubricating oil composition (100% by mass), preferably 50 mass ppm or more, more preferably 70 mass ppm or more, more preferably 100 mass ppm or more, more preferably 120 mass ppm or more, still more preferably 150 mass ppm or more, still more preferably 180 mass ppm or more, more preferably 200 mass ppm or more, still more preferably 220 mass ppm or more, still more preferably 250 mass ppm or more, still more preferably 270 mass ppm or more, particularly preferably 300 mass ppm or more, Further, it is preferably 800 mass ppm or less, more preferably 700 mass ppm or less, still more preferably 600 mass ppm or less, still more preferably 500 mass ppm or less, particularly preferably 450 mass ppm or less,
- the content of the sulfur atom-free acidic phosphate in terms of phosphorus atoms is less than 100 ppm by mass based on the total amount (100% by mass) of the lubricating oil composition. , less than 50 mass ppm, less than 10 mass ppm, less than 8 mass ppm, less than 5 mass ppm, less than 3 mass ppm, or less than 1 mass ppm.
- the content of the sulfur atom-free neutral phosphate in terms of phosphorus atoms is 50 based on the total amount (100% by mass) of the lubricating oil composition. It may be less than ppm by weight, less than 10 ppm by weight, less than 8 ppm by weight, less than 5 ppm by weight, less than 3 ppm by weight, or less than 1 ppm by weight.
- the lubricating oil composition of one aspect of the present invention may optionally contain various additives other than components (B) to (D) within a range that does not impair the effects of the present invention.
- various additives include pour point depressants, antioxidants, metallic detergents, metal deactivators, friction modifiers, rust inhibitors, antifoaming agents and the like.
- Each of these lubricating oil additives may be used alone, or two or more of them may be used in combination.
- each of these lubricating oil additives can be adjusted as appropriate within a range that does not impair the effects of the present invention. It is usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, more preferably 0.01 to 5% by mass, independently for each agent.
- the lubricating oil composition of one aspect of the present invention may further contain a pour point depressant.
- the pour point depressants may be used alone or in combination of two or more.
- Pour point depressants used in one embodiment of the present invention include, for example, ethylene-vinyl acetate copolymers, condensates of chlorinated paraffin and naphthalene, condensates of chlorinated paraffin and phenol, polymethacrylates, and polyalkylstyrenes. etc.
- the lubricating oil composition of one aspect of the present invention may further contain an antioxidant.
- An antioxidant may be used independently and may use 2 or more types together.
- Antioxidants used in one aspect of the present invention include, for example, alkylated diphenylamine, phenylnaphthylamine, alkylated phenylnaphthylamine, and other amine-based antioxidants; (2,6-di-t-butylphenol), isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, n-octadecyl-3-(3,5-di-t-butyl-4 - phenolic antioxidants such as hydroxyphenyl)propionate;
- the antioxidant is a combination of an amine-based antioxidant and a phenol-based antioxidant.
- the lubricating oil composition of one aspect of the present invention may further contain a metallic detergent.
- Metal-based detergents may be used alone or in combination of two or more.
- Metallic detergents for use in one aspect of the present invention include metal salts such as metal sulfonates, metal salicylates, and metal phenates.
- the metal atom constituting the metal salt is preferably a metal atom selected from alkali metals and alkaline earth metals, more preferably sodium, calcium, magnesium, or barium, and still more preferably calcium.
- the metallic detergent preferably contains one or more selected from calcium sulfonate, calcium salicylate, and calcium phenate, more preferably calcium sulfonate.
- the content of calcium sulfonate is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and still more preferably 70% by mass, based on the total amount (100% by mass) of the metallic detergent contained in the lubricating oil composition. ⁇ 100% by mass, more preferably 80 to 100% by mass.
- the base number of the metallic detergent is preferably 0 to 600 mgKOH/g.
- the metallic detergent is preferably an overbased metallic detergent having a base value of 100 mgKOH/g or more.
- the base number of the overbased metallic detergent is 100 mgKOH/g or more, preferably 150 to 500 mgKOH/g, more preferably 200 to 450 mgKOH/g.
- base number refers to 7. of JIS K2501:2003 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
- the lubricating oil composition of one aspect of the present invention may further contain a metal deactivator.
- the metal deactivators may be used alone or in combination of two or more. Examples of metal deactivators used in one embodiment of the present invention include benzotriazole-based compounds, tolyltriazole-based compounds, imidazole-based compounds, pyrimidine-based compounds, and the like.
- the lubricating oil composition of one aspect of the present invention may further contain a friction modifier.
- the friction modifier may be used alone or in combination of two or more.
- friction modifiers used in one aspect of the present invention include molybdenum-based friction modifiers such as molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and amine salts of molybdic acid; alkyl groups having 6 to 30 carbon atoms; or ashless friction modifiers having at least one alkenyl group in the molecule, such as aliphatic amines, fatty acid esters, fatty acid amides, fatty acids, fatty alcohols, and aliphatic ethers; mentioned.
- MoDTC molybdenum dithiocarbamate
- MoDTP molybdenum dithiophosphate
- amine salts of molybdic acid alkyl groups having 6 to 30 carbon atoms
- ashless friction modifiers having at least one
- the lubricating oil composition of one aspect of the present invention may further contain a rust inhibitor.
- the rust inhibitor may be used alone or in combination of two or more.
- Examples of the rust inhibitor used in one aspect of the present invention include fatty acids, alkenyl succinic acid half esters, fatty acid soaps, alkylsulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, paraffin oxide, alkylpolyoxyethylene ethers, and the like. mentioned.
- the lubricating oil composition of one aspect of the present invention may further contain an antifoaming agent.
- Antifoaming agents may be used alone or in combination of two or more.
- Antifoaming agents used in one aspect of the present invention include, for example, silicone oils, fluorosilicone oils, fluoroalkyl ethers, and the like.
- the method for producing the lubricating oil composition of one aspect of the present invention is not particularly limited, but from the viewpoint of productivity, component (A), components (B) and (C), and, if necessary, It is preferable to have a step of blending the above various additives other than the component (D) and the components (B) to (D). Preferred compounds and blending amounts of components (A) to (D) and various additives are as described above.
- the kinematic viscosity at 100° C. of the lubricating oil composition of one embodiment of the present invention is preferably 2. from the viewpoint of further improving the insulating properties, increasing the flash point, and making the lubricating oil composition excellent in handleability.
- the viscosity index of the lubricating oil composition of one embodiment of the present invention is preferably 80 or higher, more preferably 90 or higher, even more preferably 100 or higher, still more preferably 110 or higher, and particularly preferably 117 or higher.
- the stage of load when scuffing occurs is preferably 5 or more, more preferably 6. or more, more preferably 7 or more, and even more preferably 8 or more.
- the ISOT test in accordance with JIS K2514 was performed using copper pieces as a catalyst at a temperature of 150 ° C. for 72 hours, as described in the examples below.
- the copper elution amount of the oil composition is preferably less than 15 mass ppm, more preferably 14 mass ppm or less, still more preferably 13 mass ppm or less, even more preferably 12 mass ppm or less, and particularly preferably 11 mass ppm or less.
- the amount of copper elution means a value measured according to JPI-5S-38-92.
- the lubricating oil composition of one aspect of the present invention was subjected to an oxidation stability test according to CEC L-48-A-00 (B) at a temperature of 160 ° C. for 192 hours as described in the examples below.
- the 100 ° C kinematic viscosity increase rate before and after the test is preferably less than 12%, more preferably 10% or less, more preferably 9% or less, still more preferably 8% or less, still more preferably 7% or less, even more preferably is 6% or less, particularly preferably 5% or less.
- the 100° C. kinematic viscosity increase rate is a value calculated from the following formula, and the kinematic viscosity is a value measured according to JIS K2283:2000.
- ⁇ [100 ° C kinematic viscosity increase rate (%)] ([100 ° C kinematic viscosity of the lubricating oil composition after the test (mm 2 / s)] - [100 ° C kinematic viscosity of the lubricating oil composition before the test ( mm 2 /s)]) / [100 ° C kinematic viscosity of the lubricating oil composition before the test (mm 2 /s)] ⁇ 100
- the volume resistivity of the lubricating oil composition measured under the conditions described in Examples below in accordance with JIS C2101 is preferably 1.7 ⁇ 10 7 ⁇ . ⁇ m or more, more preferably 1.9 ⁇ 10 7 ⁇ m or more, more preferably 2.0 ⁇ 10 7 ⁇ m or more, still more preferably 2.2 ⁇ 10 7 ⁇ m or more, still more preferably 2 .3 ⁇ 10 7 ⁇ m or more, more preferably 2.5 ⁇ 10 7 ⁇ m or more, particularly preferably 2.7 ⁇ 10 7 ⁇ m or more, and usually 1.0 ⁇ 10 9 ⁇ m or less.
- the lubricating oil composition of one preferred embodiment of the present invention can improve properties such as scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties in a well-balanced manner.
- the lubricating oil composition of one preferred embodiment of the present invention is excellent in terms of cooling performance because it can maintain these characteristics well even when the viscosity is reduced.
- the lubricating oil composition of one embodiment of the present invention is incorporated in various devices such as engines, transmissions, reduction gears, compressors, hydraulic devices, torque converters, wet clutches, etc. , gear bearing mechanisms, oil pumps, hydraulic control mechanisms, and other mechanisms.
- the lubricating oil composition of one embodiment of the present invention is preferably used for lubricating a speed reducer.
- the present invention can also provide the following [1] and [2].
- [1] Contains a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C), and the content of the component (B) is 0 based on the total amount of the lubricating oil composition less than 60% by mass, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in terms of mass ratio, and boron derived from the component (C) Atom content is 300 mass ppm or less based on the total amount of the lubricating oil composition, A speed reducer using a lubricating oil composition.
- [2] Contains a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C), and the content of the component (B) is 0 based on the total amount of the lubricating oil composition less than 60% by mass, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in terms of mass ratio, and boron derived from the component (C) Atom content is 300 mass ppm or less based on the total amount of the lubricating oil composition, Use of the lubricating oil composition, wherein the lubricating oil composition is applied to lubricate a speed reducer.
- Preferred aspects of the lubricating oil compositions described in [1] and [2] above are as described above.
- the present invention will be described in more detail with reference to examples, but the present invention is not limited by these examples.
- the measuring method of various physical properties is as follows.
- Examples 1-13, Comparative Examples 1-7 The types of base oils and various additives shown in Table 1 were added and mixed in the amounts shown in Table 1 to prepare lubricating oil compositions.
- the details of each component used in the preparation of the lubricating oil composition are as follows.
- the content of molybdenum atoms was less than 2 ppm by mass in all lubricating oil compositions.
- ⁇ [100 ° C kinematic viscosity increase rate (%)] ([100 ° C kinematic viscosity of the lubricating oil composition after the test (mm 2 / s)] - [100 ° C kinematic viscosity of the lubricating oil composition before the test ( mm 2 /s)]) / [100 ° C kinematic viscosity of the lubricating oil composition before the test (mm 2 /s)] ⁇ 100
- the lubricating oil compositions of Examples 1 to 13 had well-balanced and excellent scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties.
- the lubricating oil composition of Comparative Example 1 was inferior in oxidation stability
- the lubricating oil compositions of Comparative Examples 2-3 and 6-7 were inferior in copper elution inhibitory effect.
- the lubricating oil compositions of Comparative Examples 4 and 5 were inferior in scuffing resistance and insulation.
Abstract
A lubricant composition is provided which contains a base oil (A), a thiadiazole compound (B) and a boron-modified alkenyl succinimide (C), wherein the content of component (B) is less than 0.60 mass% on the basis of the total amount of the lubricant composition, the content ratio [B/N] of boron atoms and nitrogen atoms derived from component (C) is greater than or equal to 0.35 by mass ratio, and the content of boron atoms derived from component (C) is less than or equal to 300 ppm on the basis of the total amount of the lubricant composition.
Description
本発明は、潤滑油組成物、減速機、及び潤滑油組成物の使用に関する。
The present invention relates to a lubricating oil composition, a speed reducer, and the use of the lubricating oil composition.
エンジン、変速機、減速機、圧縮機、油圧装置等の各種装置は、トルクコンバータ、湿式クラッチ、歯車軸受機構、オイルポンプ、油圧制御機構等の機構を有する。これらの機構においては、潤滑油組成物が用いられており、様々な要求に対応し得る潤滑油組成物が開発されている。
例えば、特許文献１には、省燃費性能と歯車や軸受け等の十分な耐久性を兼ね備えたギヤ油組成物の提供を目的として、低粘度の鉱油系潤滑油基油と高粘度の溶剤精製鉱油系潤滑油とを所定の割合で配合してなる基油に、ジアルキルジチオリン酸亜鉛及びアルカリ土類金属系清浄剤を所定の配合量で配合してなるギヤ油組成物が開示されている。 Various devices such as engines, transmissions, reduction gears, compressors, and hydraulic devices have mechanisms such as torque converters, wet clutches, gear bearing mechanisms, oil pumps, and hydraulic control mechanisms. Lubricating oil compositions are used in these mechanisms, and lubricating oil compositions that can meet various demands have been developed.
For example, in Patent Document 1, for the purpose of providing a gear oil composition having both fuel-saving performance and sufficient durability of gears, bearings, etc., a low-viscosity mineral oil-based lubricating base oil and a high-viscosity solvent-refined mineral oil are disclosed. A gear oil composition is disclosed in which zinc dialkyldithiophosphate and an alkaline earth metal-based detergent are blended in predetermined blending amounts in a base oil obtained by blending a base lubricating oil in a predetermined proportion.
例えば、特許文献１には、省燃費性能と歯車や軸受け等の十分な耐久性を兼ね備えたギヤ油組成物の提供を目的として、低粘度の鉱油系潤滑油基油と高粘度の溶剤精製鉱油系潤滑油とを所定の割合で配合してなる基油に、ジアルキルジチオリン酸亜鉛及びアルカリ土類金属系清浄剤を所定の配合量で配合してなるギヤ油組成物が開示されている。 Various devices such as engines, transmissions, reduction gears, compressors, and hydraulic devices have mechanisms such as torque converters, wet clutches, gear bearing mechanisms, oil pumps, and hydraulic control mechanisms. Lubricating oil compositions are used in these mechanisms, and lubricating oil compositions that can meet various demands have been developed.
For example, in Patent Document 1, for the purpose of providing a gear oil composition having both fuel-saving performance and sufficient durability of gears, bearings, etc., a low-viscosity mineral oil-based lubricating base oil and a high-viscosity solvent-refined mineral oil are disclosed. A gear oil composition is disclosed in which zinc dialkyldithiophosphate and an alkaline earth metal-based detergent are blended in predetermined blending amounts in a base oil obtained by blending a base lubricating oil in a predetermined proportion.
ところで、例えば、電動モーター等の各種装置に用いられる潤滑油組成物には、絶縁性と共に、その装置の態様によっては、耐スカッフィング性、銅溶出抑制効果、酸化安定性等の特性が要求される場合がある。つまり、装置内に組み込まれた各種機構に応じた潤滑に適した特性（例えば、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性等）を有する新たな潤滑油組成物が求められている。
By the way, for example, lubricating oil compositions used in various devices such as electric motors are required to have properties such as scuffing resistance, copper elution inhibitory effect, oxidation stability, etc. depending on the mode of the device, in addition to insulating properties. Sometimes. In other words, a new lubricating oil composition having characteristics suitable for lubrication according to various mechanisms incorporated in the device (for example, scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties) is required. ing.
本発明は、基油と共に、チアジアゾール系化合物、及び、ホウ素変性アルケニルコハク酸イミドを含有し、チアジアゾール系化合物の含有量、並びに、ホウ素変性アルケニルコハク酸イミドに由来のホウ素原子及び窒素原子の含有量を所定の範囲に調整した潤滑油組成物を提供する。
具体的には、下記［１］～［１４］の態様に係る潤滑油組成物、減速機、及び潤滑油組成物の使用を提供する。
［１］基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有する潤滑油組成物であって、
成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、
成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、
成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物。
［２］成分（Ｃ）に由来する窒素原子の含有量が、前記潤滑油組成物の全量基準で、３２０質量ｐｐｍ以下である、上記［１］に記載の潤滑油組成物。
［３］成分（Ｃ）に由来する窒素原子の含有量が、前記潤滑油組成物の全量基準で、５．０～３２０質量ｐｐｍである、上記［１］又は［２］に記載の潤滑油組成物。
［４］成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５～２．０である、上記［１］～［３］のいずれか一項に記載の潤滑油組成物。
［５］成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３．０～３００質量ｐｐｍである、上記［１］～［４］のいずれか一項に記載の潤滑油組成物。
［６］成分（Ｃ）が、ホウ素変性アルケニルコハク酸ビスイミド（Ｃ１）を含む、上記［１］～［５］のいずれか一項に記載の潤滑油組成物。
［７］成分（Ｂ）が、分岐鎖アルキル基を有するチアジアゾール系化合物（Ｂ１）を含む、上記［１］～［６］のいずれか一項に記載の潤滑油組成物。
［８］硫化オレフィンの含有量が、前記潤滑油組成物の全量基準で、０．２０質量％未満である、上記［１］～［７］のいずれか一項に記載の潤滑油組成物。
［９］前記潤滑油組成物の１００℃における動粘度が２．１ｍｍ２／ｓ以上５．０ｍｍ２／ｓ未満である、上記［１］～［８］のいずれか一項に記載の潤滑油組成物。
［１０］さらにリン酸エステル及び亜リン酸エステルから選ばれる１種以上のリン系化合物（Ｄ）を含有する、上記［１］～［９］のいずれか一項に記載の潤滑油組成物。
［１１］成分（Ｄ）が、硫黄原子含有リン酸エステル及び硫黄原子含有亜リン酸エステルから選ばれる１種以上の硫黄リン系化合物（Ｄ１）を含む、上記［１０］に記載の潤滑油組成物。
［１２］減速機の潤滑に用いられる、上記［１］～［１１］のいずれか一項に記載の潤滑油組成物。
［１３］上記［１］～［１２］のいずれか一項に記載の潤滑油組成物を適用した、減速機。
［１４］上記［１］～［１２］のいずれか一項に記載の潤滑油組成物を減速機の潤滑に適用する、潤滑油組成物の使用。 The present invention contains a thiadiazole-based compound and a boron-modified alkenylsuccinimide together with a base oil, and the content of the thiadiazole-based compound and the content of boron atoms and nitrogen atoms derived from the boron-modified alkenylsuccinimide is adjusted to a predetermined range.
Specifically, the present invention provides a lubricating oil composition, a speed reducer, and use of the lubricating oil composition according to the following aspects [1] to [14].
[1] A lubricating oil composition containing a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C),
The content of component (B) is less than 0.60% by mass based on the total amount of the lubricating oil composition,
The content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in mass ratio,
The content of boron atoms derived from the component (C) is 300 mass ppm or less based on the total amount of the lubricating oil composition.
lubricating oil composition.
[2] The lubricating oil composition according to [1] above, wherein the content of nitrogen atoms derived from component (C) is 320 mass ppm or less based on the total amount of the lubricating oil composition.
[3] The lubricating oil according to [1] or [2] above, wherein the content of nitrogen atoms derived from component (C) is 5.0 to 320 ppm by mass based on the total amount of the lubricating oil composition. Composition.
[4] Any of the above [1] to [3], wherein the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 to 2.0 by mass. or the lubricating oil composition according to claim 1.
[5] Any one of the above [1] to [4], wherein the content of boron atoms derived from the component (C) is 3.0 to 300 ppm by mass based on the total amount of the lubricating oil composition. Lubricating oil composition according to.
[6] The lubricating oil composition according to any one of [1] to [5] above, wherein component (C) comprises boron-modified alkenylsuccinic acid bisimide (C1).
[7] The lubricating oil composition according to any one of [1] to [6] above, wherein component (B) comprises a thiadiazole compound (B1) having a branched alkyl group.
[8] The lubricating oil composition according to any one of [1] to [7] above, wherein the content of the sulfurized olefin is less than 0.20% by mass based on the total amount of the lubricating oil composition.
[9] The lubricating oil according to any one of [1] to [8] above, wherein the lubricating oil composition has a kinematic viscosity at 100° C. of 2.1 mm 2 /s or more and less than 5.0 mm 2 /s. Composition.
[10] The lubricating oil composition according to any one of [1] to [9] above, further comprising one or more phosphorus compounds (D) selected from phosphates and phosphites.
[11] The lubricating oil composition according to [10] above, wherein the component (D) contains one or more sulfur-phosphorus compounds (D1) selected from sulfur-atom-containing phosphates and sulfur-atom-containing phosphites. thing.
[12] The lubricating oil composition according to any one of [1] to [11] above, which is used for lubricating a speed reducer.
[13] A speed reducer to which the lubricating oil composition according to any one of [1] to [12] is applied.
[14] Use of a lubricating oil composition, wherein the lubricating oil composition according to any one of [1] to [12] above is applied to lubricate a speed reducer.
具体的には、下記［１］～［１４］の態様に係る潤滑油組成物、減速機、及び潤滑油組成物の使用を提供する。
［１］基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有する潤滑油組成物であって、
成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、
成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、
成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物。
［２］成分（Ｃ）に由来する窒素原子の含有量が、前記潤滑油組成物の全量基準で、３２０質量ｐｐｍ以下である、上記［１］に記載の潤滑油組成物。
［３］成分（Ｃ）に由来する窒素原子の含有量が、前記潤滑油組成物の全量基準で、５．０～３２０質量ｐｐｍである、上記［１］又は［２］に記載の潤滑油組成物。
［４］成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５～２．０である、上記［１］～［３］のいずれか一項に記載の潤滑油組成物。
［５］成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３．０～３００質量ｐｐｍである、上記［１］～［４］のいずれか一項に記載の潤滑油組成物。
［６］成分（Ｃ）が、ホウ素変性アルケニルコハク酸ビスイミド（Ｃ１）を含む、上記［１］～［５］のいずれか一項に記載の潤滑油組成物。
［７］成分（Ｂ）が、分岐鎖アルキル基を有するチアジアゾール系化合物（Ｂ１）を含む、上記［１］～［６］のいずれか一項に記載の潤滑油組成物。
［８］硫化オレフィンの含有量が、前記潤滑油組成物の全量基準で、０．２０質量％未満である、上記［１］～［７］のいずれか一項に記載の潤滑油組成物。
［９］前記潤滑油組成物の１００℃における動粘度が２．１ｍｍ２／ｓ以上５．０ｍｍ２／ｓ未満である、上記［１］～［８］のいずれか一項に記載の潤滑油組成物。
［１０］さらにリン酸エステル及び亜リン酸エステルから選ばれる１種以上のリン系化合物（Ｄ）を含有する、上記［１］～［９］のいずれか一項に記載の潤滑油組成物。
［１１］成分（Ｄ）が、硫黄原子含有リン酸エステル及び硫黄原子含有亜リン酸エステルから選ばれる１種以上の硫黄リン系化合物（Ｄ１）を含む、上記［１０］に記載の潤滑油組成物。
［１２］減速機の潤滑に用いられる、上記［１］～［１１］のいずれか一項に記載の潤滑油組成物。
［１３］上記［１］～［１２］のいずれか一項に記載の潤滑油組成物を適用した、減速機。
［１４］上記［１］～［１２］のいずれか一項に記載の潤滑油組成物を減速機の潤滑に適用する、潤滑油組成物の使用。 The present invention contains a thiadiazole-based compound and a boron-modified alkenylsuccinimide together with a base oil, and the content of the thiadiazole-based compound and the content of boron atoms and nitrogen atoms derived from the boron-modified alkenylsuccinimide is adjusted to a predetermined range.
Specifically, the present invention provides a lubricating oil composition, a speed reducer, and use of the lubricating oil composition according to the following aspects [1] to [14].
[1] A lubricating oil composition containing a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C),
The content of component (B) is less than 0.60% by mass based on the total amount of the lubricating oil composition,
The content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in mass ratio,
The content of boron atoms derived from the component (C) is 300 mass ppm or less based on the total amount of the lubricating oil composition.
lubricating oil composition.
[2] The lubricating oil composition according to [1] above, wherein the content of nitrogen atoms derived from component (C) is 320 mass ppm or less based on the total amount of the lubricating oil composition.
[3] The lubricating oil according to [1] or [2] above, wherein the content of nitrogen atoms derived from component (C) is 5.0 to 320 ppm by mass based on the total amount of the lubricating oil composition. Composition.
[4] Any of the above [1] to [3], wherein the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 to 2.0 by mass. or the lubricating oil composition according to claim 1.
[5] Any one of the above [1] to [4], wherein the content of boron atoms derived from the component (C) is 3.0 to 300 ppm by mass based on the total amount of the lubricating oil composition. Lubricating oil composition according to.
[6] The lubricating oil composition according to any one of [1] to [5] above, wherein component (C) comprises boron-modified alkenylsuccinic acid bisimide (C1).
[7] The lubricating oil composition according to any one of [1] to [6] above, wherein component (B) comprises a thiadiazole compound (B1) having a branched alkyl group.
[8] The lubricating oil composition according to any one of [1] to [7] above, wherein the content of the sulfurized olefin is less than 0.20% by mass based on the total amount of the lubricating oil composition.
[9] The lubricating oil according to any one of [1] to [8] above, wherein the lubricating oil composition has a kinematic viscosity at 100° C. of 2.1 mm 2 /s or more and less than 5.0 mm 2 /s. Composition.
[10] The lubricating oil composition according to any one of [1] to [9] above, further comprising one or more phosphorus compounds (D) selected from phosphates and phosphites.
[11] The lubricating oil composition according to [10] above, wherein the component (D) contains one or more sulfur-phosphorus compounds (D1) selected from sulfur-atom-containing phosphates and sulfur-atom-containing phosphites. thing.
[12] The lubricating oil composition according to any one of [1] to [11] above, which is used for lubricating a speed reducer.
[13] A speed reducer to which the lubricating oil composition according to any one of [1] to [12] is applied.
[14] Use of a lubricating oil composition, wherein the lubricating oil composition according to any one of [1] to [12] above is applied to lubricate a speed reducer.
本発明の好適な一態様の潤滑油組成物は、装置内に組み込まれた各種機構に適した特性を有する潤滑油組成物であり、より好適な一態様の潤滑油組成物は、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性等の特性をバランス良く向上させ得る。そのため、これらの潤滑油組成物は、減速機等の潤滑に好適に使用し得る。
A preferred embodiment of the lubricating oil composition of the present invention is a lubricating oil composition having properties suitable for various mechanisms incorporated in a device, and a more preferred aspect of the lubricating oil composition is scuffing resistance , copper elution inhibitory effect, oxidation stability, and insulating properties can be improved in a well-balanced manner. Therefore, these lubricating oil compositions can be suitably used for lubricating speed reducers and the like.
本明細書に記載された数値範囲については、上限値及び下限値を任意に組み合わせることができる。例えば、数値範囲として「好ましくは３０～１００、より好ましくは４０～８０」と記載されている場合、「３０～８０」との範囲や「４０～１００」との範囲も、本明細書に記載された数値範囲に含まれる。また、例えば、数値範囲として「好ましくは３０以上、より好ましくは４０以上であり、また、好ましくは１００以下、より好ましくは８０以下である」と記載されている場合、「３０～８０」との範囲や「４０～１００」との範囲も、本明細書に記載された数値範囲に含まれる。
加えて、本明細書に記載された数値範囲として、例えば「６０～１００」との記載は、「６０以上、１００以下」という範囲であることを意味する。 For the numerical ranges described herein, the upper and lower limits can be combined arbitrarily. For example, when the numerical range is described as "preferably 30 to 100, more preferably 40 to 80", the range of "30 to 80" and the range of "40 to 100" are also described in this specification. included in the specified numerical range. Further, for example, when the numerical range is described as "preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less", "30 to 80" Ranges and ranges from "40 to 100" are also included in the numerical ranges described herein.
In addition, as a numerical range described in this specification, for example, "60 to 100" means a range of "60 or more and 100 or less".
加えて、本明細書に記載された数値範囲として、例えば「６０～１００」との記載は、「６０以上、１００以下」という範囲であることを意味する。 For the numerical ranges described herein, the upper and lower limits can be combined arbitrarily. For example, when the numerical range is described as "preferably 30 to 100, more preferably 40 to 80", the range of "30 to 80" and the range of "40 to 100" are also described in this specification. included in the specified numerical range. Further, for example, when the numerical range is described as "preferably 30 or more, more preferably 40 or more, and preferably 100 or less, more preferably 80 or less", "30 to 80" Ranges and ranges from "40 to 100" are also included in the numerical ranges described herein.
In addition, as a numerical range described in this specification, for example, "60 to 100" means a range of "60 or more and 100 or less".
本明細書において、動粘度及び粘度指数は、ＪＩＳ Ｋ２２８３：２０００に準拠して測定又は算出された値を意味する。
本明細書において、ホウ素原子及びリン原子の含有量は、ＪＰＩ－５Ｓ－３８－９２に準拠して測定した値を意味する。
本明細書において、窒素原子の含有量は、ＪＩＳ Ｋ２６０９に準拠して測定した値を意味する。
本明細書において、硫黄原子の含有量は、ＪＩＳ Ｋ２５４１－６：２０１３に準拠して測定した値を意味する。 As used herein, kinematic viscosity and viscosity index mean values measured or calculated according to JIS K2283:2000.
As used herein, the content of boron atoms and phosphorus atoms means values measured according to JPI-5S-38-92.
As used herein, the content of nitrogen atoms means a value measured according to JIS K2609.
As used herein, the sulfur atom content means a value measured according to JIS K2541-6:2013.
本明細書において、ホウ素原子及びリン原子の含有量は、ＪＰＩ－５Ｓ－３８－９２に準拠して測定した値を意味する。
本明細書において、窒素原子の含有量は、ＪＩＳ Ｋ２６０９に準拠して測定した値を意味する。
本明細書において、硫黄原子の含有量は、ＪＩＳ Ｋ２５４１－６：２０１３に準拠して測定した値を意味する。 As used herein, kinematic viscosity and viscosity index mean values measured or calculated according to JIS K2283:2000.
As used herein, the content of boron atoms and phosphorus atoms means values measured according to JPI-5S-38-92.
As used herein, the content of nitrogen atoms means a value measured according to JIS K2609.
As used herein, the sulfur atom content means a value measured according to JIS K2541-6:2013.
〔潤滑油組成物の構成〕
本発明の一態様の潤滑油組成物は、基油（Ａ）（以下、「成分（Ａ）」ともいう）、チアジアゾール系化合物（以下、「成分（Ｂ）」ともいう）、及びホウ素変性アルケニルコハク酸イミド（以下、「成分（Ｃ）」ともいう）を含有する。
装置内に組み込まれた各種機構の歯面等のすべり接触面の潤滑において、スカッフィングと呼ばれる固相凝着による局部的表面損傷の発生が問題となる。本発明者らの検討によれば、スカッフィングは、動粘度が低い潤滑油組成物ほど生じ易いことが分かった。また、動粘度が低い潤滑油組成物は、体積抵抗率の低下も見られ、絶縁性の点からも問題となる。
本発明者らは、チアジアゾール系化合物を含む潤滑油組成物とすることで、耐スカッフィング性を向上させることを見出したが、同時に、銅溶出量の増大や酸化安定性の低下といった新たな問題が生じることも分かった。そこで、本発明者らは、このような問題の解決するために様々な検討をした結果、チアジアゾール系化合物と共にホウ素変性アルケニルコハク酸イミドを含有する潤滑油組成物とし、当該潤滑油組成物中のチアジアゾール系化合物の含有量、並びに、ホウ素変性アルケニルコハク酸イミドに由来のホウ素原子及び窒素原子の含有量を所定の範囲に調整することで、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性等の特性をバランス良く向上させた潤滑油組成物となり得るとの知見を得た。本発明の一態様の潤滑油組成物は、この知見に基づいて成されたものである。 [Structure of lubricating oil composition]
A lubricating oil composition of one aspect of the present invention comprises a base oil (A) (hereinafter also referred to as "component (A)"), a thiadiazole compound (hereinafter also referred to as "component (B)"), and a boron-modified alkenyl It contains succinimide (hereinafter also referred to as "component (C)").
In the lubrication of sliding contact surfaces such as tooth flanks of various mechanisms incorporated in equipment, the occurrence of local surface damage due to solid-phase adhesion called scuffing is a problem. According to studies by the present inventors, it was found that scuffing is more likely to occur in lubricating oil compositions with lower kinematic viscosities. In addition, a lubricating oil composition having a low kinematic viscosity exhibits a decrease in volume resistivity, which poses a problem in terms of insulating properties.
The present inventors have found that scuffing resistance is improved by using a lubricating oil composition containing a thiadiazole compound, but at the same time, new problems such as an increase in the amount of copper elution and a decrease in oxidation stability occur. I also know it happens. Therefore, as a result of various studies to solve such problems, the present inventors have made a lubricating oil composition containing a boron-modified alkenyl succinimide together with a thiadiazole-based compound. By adjusting the content of the thiadiazole-based compound and the content of boron atoms and nitrogen atoms derived from the boron-modified alkenylsuccinimide to a predetermined range, scuffing resistance, copper elution suppression effect, oxidation stability, and The present inventors have found that a lubricating oil composition having well-balanced improved properties such as insulating properties can be obtained. A lubricating oil composition according to one aspect of the present invention was made based on this finding.
本発明の一態様の潤滑油組成物は、基油（Ａ）（以下、「成分（Ａ）」ともいう）、チアジアゾール系化合物（以下、「成分（Ｂ）」ともいう）、及びホウ素変性アルケニルコハク酸イミド（以下、「成分（Ｃ）」ともいう）を含有する。
装置内に組み込まれた各種機構の歯面等のすべり接触面の潤滑において、スカッフィングと呼ばれる固相凝着による局部的表面損傷の発生が問題となる。本発明者らの検討によれば、スカッフィングは、動粘度が低い潤滑油組成物ほど生じ易いことが分かった。また、動粘度が低い潤滑油組成物は、体積抵抗率の低下も見られ、絶縁性の点からも問題となる。
本発明者らは、チアジアゾール系化合物を含む潤滑油組成物とすることで、耐スカッフィング性を向上させることを見出したが、同時に、銅溶出量の増大や酸化安定性の低下といった新たな問題が生じることも分かった。そこで、本発明者らは、このような問題の解決するために様々な検討をした結果、チアジアゾール系化合物と共にホウ素変性アルケニルコハク酸イミドを含有する潤滑油組成物とし、当該潤滑油組成物中のチアジアゾール系化合物の含有量、並びに、ホウ素変性アルケニルコハク酸イミドに由来のホウ素原子及び窒素原子の含有量を所定の範囲に調整することで、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性等の特性をバランス良く向上させた潤滑油組成物となり得るとの知見を得た。本発明の一態様の潤滑油組成物は、この知見に基づいて成されたものである。 [Structure of lubricating oil composition]
A lubricating oil composition of one aspect of the present invention comprises a base oil (A) (hereinafter also referred to as "component (A)"), a thiadiazole compound (hereinafter also referred to as "component (B)"), and a boron-modified alkenyl It contains succinimide (hereinafter also referred to as "component (C)").
In the lubrication of sliding contact surfaces such as tooth flanks of various mechanisms incorporated in equipment, the occurrence of local surface damage due to solid-phase adhesion called scuffing is a problem. According to studies by the present inventors, it was found that scuffing is more likely to occur in lubricating oil compositions with lower kinematic viscosities. In addition, a lubricating oil composition having a low kinematic viscosity exhibits a decrease in volume resistivity, which poses a problem in terms of insulating properties.
The present inventors have found that scuffing resistance is improved by using a lubricating oil composition containing a thiadiazole compound, but at the same time, new problems such as an increase in the amount of copper elution and a decrease in oxidation stability occur. I also know it happens. Therefore, as a result of various studies to solve such problems, the present inventors have made a lubricating oil composition containing a boron-modified alkenyl succinimide together with a thiadiazole-based compound. By adjusting the content of the thiadiazole-based compound and the content of boron atoms and nitrogen atoms derived from the boron-modified alkenylsuccinimide to a predetermined range, scuffing resistance, copper elution suppression effect, oxidation stability, and The present inventors have found that a lubricating oil composition having well-balanced improved properties such as insulating properties can be obtained. A lubricating oil composition according to one aspect of the present invention was made based on this finding.
本発明の一態様の潤滑油組成物は、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、さらにリン酸エステル及び亜リン酸エステルから選ばれる１種以上のリン系化合物（Ｄ）（以下、「成分（Ｄ）」ともいう）を含有することが好ましい。
また、本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、必要に応じて、成分（Ｂ）～（Ｄ）以外の各種添加剤をさらに含有してもよい。 The lubricating oil composition of one aspect of the present invention further includes one or more phosphorus-based compounds selected from phosphates and phosphites (D ) (hereinafter also referred to as “component (D)”).
In addition, the lubricating oil composition of one aspect of the present invention may further contain various additives other than components (B) to (D), if necessary, as long as the effects of the present invention are not impaired.
また、本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、必要に応じて、成分（Ｂ）～（Ｄ）以外の各種添加剤をさらに含有してもよい。 The lubricating oil composition of one aspect of the present invention further includes one or more phosphorus-based compounds selected from phosphates and phosphites (D ) (hereinafter also referred to as “component (D)”).
In addition, the lubricating oil composition of one aspect of the present invention may further contain various additives other than components (B) to (D), if necessary, as long as the effects of the present invention are not impaired.
本発明の一態様の潤滑油組成物において、成分（Ａ）、（Ｂ）及び（Ｃ）の合計含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは５０質量％以上、より好ましくは６０質量％以上、更に好ましくは７０質量％以上、より更に好ましくは７５質量％以上、特に好ましくは８０質量％以上であり、さらに、８５質量％以上、９０質量％以上、又は９２質量％以上としてもよく、また、１００質量％以下、９９．５質量％以下、９９．０質量％以下、９８．５質量％以下、９８．０質量％以下、９７．５質量％以下、９７．０質量％以下、９６．５質量％以下、又は９６．０質量％以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the total content of components (A), (B) and (C) is based on the total amount (100% by mass) of the lubricating oil composition, preferably 50% by mass above, more preferably 60% by mass or more, still more preferably 70% by mass or more, even more preferably 75% by mass or more, particularly preferably 80% by mass or more, and further 85% by mass or more, 90% by mass or more, or It may be 92% by mass or more, and 100% by mass or less, 99.5% by mass or less, 99.0% by mass or less, 98.5% by mass or less, 98.0% by mass or less, 97.5% by mass or less, It may be 97.0% by mass or less, 96.5% by mass or less, or 96.0% by mass or less.
本発明の一態様の潤滑油組成物において、成分（Ａ）、（Ｂ）、（Ｃ）及び（Ｄ）の合計含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは５０質量％超、より好ましくは６０質量％超、更に好ましくは７０質量％超、より更に好ましくは７５質量％超、特に好ましくは８０質量％超であり、さらに、８３質量％超、８５質量％超、８７質量％超、９０質量％超、９２質量％超、又は９４質量％以上としてもよく、また、１００質量％以下、９９．９質量％以下、９９．５質量％以下、９９．０質量％以下、９８．５質量％以下、９８．０質量％以下、９７．５質量％以下、９７．０質量％以下、９６．５質量％以下、又は９６．０質量％以下としてもよい。
以下、本発明の一態様の潤滑油組成物に含まれる各成分の詳細について説明する。 In the lubricating oil composition of one aspect of the present invention, the total content of components (A), (B), (C) and (D) is based on the total amount (100% by mass) of the lubricating oil composition, preferably is more than 50% by mass, more preferably more than 60% by mass, more preferably more than 70% by mass, even more preferably more than 75% by mass, particularly preferably more than 80% by mass, and more than 83% by mass, 85% by mass %, 87% by mass, 90% by mass, 92% by mass, or 94% by mass or more, and 100% by mass or less, 99.9% by mass or less, 99.5% by mass or less, 99.5% by mass or less. 0% by mass or less, 98.5% by mass or less, 98.0% by mass or less, 97.5% by mass or less, 97.0% by mass or less, 96.5% by mass or less, or 96.0% by mass or less .
Details of each component contained in the lubricating oil composition of one embodiment of the present invention are described below.
以下、本発明の一態様の潤滑油組成物に含まれる各成分の詳細について説明する。 In the lubricating oil composition of one aspect of the present invention, the total content of components (A), (B), (C) and (D) is based on the total amount (100% by mass) of the lubricating oil composition, preferably is more than 50% by mass, more preferably more than 60% by mass, more preferably more than 70% by mass, even more preferably more than 75% by mass, particularly preferably more than 80% by mass, and more than 83% by mass, 85% by mass %, 87% by mass, 90% by mass, 92% by mass, or 94% by mass or more, and 100% by mass or less, 99.9% by mass or less, 99.5% by mass or less, 99.5% by mass or less. 0% by mass or less, 98.5% by mass or less, 98.0% by mass or less, 97.5% by mass or less, 97.0% by mass or less, 96.5% by mass or less, or 96.0% by mass or less .
Details of each component contained in the lubricating oil composition of one embodiment of the present invention are described below.
＜成分（Ａ）：基油＞
本発明の一態様で用いる成分（Ａ）である基油としては、鉱油及び合成油から選ばれる１種以上が挙げられる。
鉱油としては、例えば、パラフィン系原油、中間基系原油、ナフテン系原油等の原油を常圧蒸留して得られる常圧残油；これらの常圧残油を減圧蒸留して得られる留出油；当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、及び水素化精製（水素化分解）等の精製処理を１つ以上施して得られる精製油；等が挙げられる。 <Component (A): Base oil>
The base oil, which is the component (A) used in one aspect of the present invention, includes one or more selected from mineral oils and synthetic oils.
Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oils, intermediate crude oils, and naphthenic crude oils; distillates obtained by vacuum distillation of these atmospheric residual oils. refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining (hydrocracking); etc.
本発明の一態様で用いる成分（Ａ）である基油としては、鉱油及び合成油から選ばれる１種以上が挙げられる。
鉱油としては、例えば、パラフィン系原油、中間基系原油、ナフテン系原油等の原油を常圧蒸留して得られる常圧残油；これらの常圧残油を減圧蒸留して得られる留出油；当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、及び水素化精製（水素化分解）等の精製処理を１つ以上施して得られる精製油；等が挙げられる。 <Component (A): Base oil>
The base oil, which is the component (A) used in one aspect of the present invention, includes one or more selected from mineral oils and synthetic oils.
Mineral oils include, for example, atmospheric residual oils obtained by atmospheric distillation of crude oils such as paraffinic crude oils, intermediate crude oils, and naphthenic crude oils; distillates obtained by vacuum distillation of these atmospheric residual oils. refined oil obtained by subjecting the distillate to one or more refining treatments such as solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrorefining (hydrocracking); etc.
合成油としては、例えば、α－オレフィン単独重合体、又はα－オレフィン共重合体（例えば、エチレン－α－オレフィン共重合体等の炭素数８～１４のα－オレフィン共重合体）等のポリα－オレフィン；イソパラフィン；ポリアルキレングリコール；ポリオールエステル、二塩基酸エステル、リン酸エステル等のエステル系油；ポリフェニルエーテル等のエーテル系油；アルキルベンゼン；アルキルナフタレン；天然ガスからフィッシャー・トロプシュ法等により製造されるワックス（ＧＴＬワックス（Gas To Liquids WAX））を異性化することで得られる合成油（ＧＴＬ）等が挙げられる。
Synthetic oils include, for example, α-olefin homopolymers, or α-olefin copolymers (for example, α-olefin copolymers having 8 to 14 carbon atoms such as ethylene-α-olefin copolymers). α-olefins; isoparaffins; polyalkylene glycols; ester oils such as polyol esters, dibasic acid esters and phosphate esters; ether oils such as polyphenyl ethers; Synthetic oil (GTL) obtained by isomerizing the manufactured wax (GTL wax (Gas To Liquids WAX)) and the like can be mentioned.
本発明の一態様で用いる成分（Ａ）は、ＡＰＩ（米国石油協会）基油カテゴリーのグループII及びグループIIIに分類される鉱油、並びに、合成油から選ばれる１種以上を含むことが好ましい。
The component (A) used in one aspect of the present invention preferably contains one or more selected from mineral oils classified into Group II and Group III of the API (American Petroleum Institute) base oil category, and synthetic oils.
本発明の一態様で用いる成分（Ａ）の１００℃における動粘度は、好ましくは１．９ｍｍ２／ｓ以上、より好ましくは２．０ｍｍ２／ｓ以上、より好ましくは２．１ｍｍ２／ｓ以上、更に好ましくは２．２ｍｍ２／ｓ以上であり、さらに、２．３ｍｍ２／ｓ以上、２．５ｍｍ２／ｓ以上、２．７ｍｍ２／ｓ以上、２．９ｍｍ２／ｓ以上、３．０ｍｍ２／ｓ以上、３．２ｍｍ２／ｓ以上、３．４ｍｍ２／ｓ以上、又は３．６ｍｍ２／ｓ以上としてもよく、また、好ましくは５．０ｍｍ２／ｓ以下、より好ましくは４．８ｍｍ２／ｓ以下、より好ましくは４．６ｍｍ２／ｓ以下、更に好ましくは４．５ｍｍ２／ｓ以下、より更に好ましくは４．３ｍｍ２／ｓ以下、特に好ましくは４．２ｍｍ２／ｓ以下であり、さらに、４．０ｍｍ２／ｓ以下、３．８ｍｍ２／ｓ以下、３．７ｍｍ２／ｓ以下、３．６ｍｍ２／ｓ以下、３．５ｍｍ２／ｓ以下、３．４ｍｍ２／ｓ以下、３．３ｍｍ２／ｓ以下、３．２ｍｍ２／ｓ以下、３．０ｍｍ２／ｓ以下、２．８ｍｍ２／ｓ以下、又は２．６ｍｍ２／ｓ以下としてもよい。
The kinematic viscosity at 100° C. of component (A) used in one embodiment of the present invention is preferably 1.9 mm 2 /s or higher, more preferably 2.0 mm 2 /s or higher, and more preferably 2.1 mm 2 /s or higher. 2.2 mm 2 /s or more, more preferably 2.3 mm 2 /s or more, 2.5 mm 2 /s or more, 2.7 mm 2 /s or more, 2.9 mm 2 /s or more; 0 mm 2 /s or more, 3.2 mm 2 /s or more, 3.4 mm 2 /s or more, or 3.6 mm 2 /s or more, preferably 5.0 mm 2 /s or less, more preferably 4 0.8 mm 2 /s or less, more preferably 4.6 mm 2 /s or less, still more preferably 4.5 mm 2 /s or less, even more preferably 4.3 mm 2 /s or less, particularly preferably 4.2 mm 2 /s 4.0 mm 2 /s or less, 3.8 mm 2 /s or less, 3.7 mm 2 /s or less, 3.6 mm 2 /s or less, 3.5 mm 2 /s or less, 3.4 mm 2 /s or less, 3.3 mm 2 /s or less, 3.2 mm 2 /s or less, 3.0 mm 2 /s or less, 2.8 mm 2 /s or less, or 2.6 mm 2 /s or less.
また、本発明の一態様で用いる成分（Ａ）の粘度指数は、好ましくは７０以上、より好ましくは８０以上、更に好ましくは９０以上、より更に好ましくは１００以上である。
In addition, the viscosity index of component (A) used in one aspect of the present invention is preferably 70 or higher, more preferably 80 or higher, even more preferably 90 or higher, and even more preferably 100 or higher.
また、本発明の一態様において、成分（Ａ）として、２種以上の基油を組み合わせた混合油を用いる場合、当該混合油の動粘度及び粘度指数が上記範囲であることが好ましい。そのため、低粘度の基油と、高粘度の基油を併用して、上記範囲の動粘度及び粘度指数となるように当該混合油を調製してもよい。
Further, in one aspect of the present invention, when a mixed oil obtained by combining two or more types of base oils is used as the component (A), the kinematic viscosity and viscosity index of the mixed oil are preferably within the above ranges. Therefore, a low-viscosity base oil and a high-viscosity base oil may be used together to prepare the mixed oil so that the kinematic viscosity and the viscosity index are within the above ranges.
本発明の一態様の潤滑油組成物において、成分（Ａ）の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは４５質量％以上、より好ましくは５０質量％以上、より好ましくは５５質量％以上、更に好ましくは６０質量％以上、より更に好ましくは６５質量％以上、特に好ましくは７０質量％以上であり、さらに、７５質量％以上、８０質量％以上、８５質量％以上、９０質量％以上、又は９２質量％以上としてもよく、また、好ましくは９９．９９質量％以下、より好ましくは９９．９０質量％以下、より好ましくは９９．５０質量％以下、更に好ましくは９９．００質量％以下、より更に好ましくは９８．５０質量％以下、特に好ましくは９８．００質量％以下であり、さらに、９７．５０質量％以下、９７．００質量％以下、９６．５０質量％以下、又は９６．００質量％以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the content of component (A) is preferably 45% by mass or more, more preferably 50% by mass or more, based on the total amount (100% by mass) of the lubricating oil composition. , More preferably 55% by mass or more, still more preferably 60% by mass or more, even more preferably 65% by mass or more, particularly preferably 70% by mass or more, and further 75% by mass or more, 80% by mass or more, 85% by mass % or more, 90% by mass or more, or 92% by mass or more, preferably 99.99% by mass or less, more preferably 99.90% by mass or less, more preferably 99.50% by mass or less, and still more preferably is 99.00% by mass or less, more preferably 98.50% by mass or less, particularly preferably 98.00% by mass or less, and further 97.50% by mass or less, 97.00% by mass or less, 96.50 % by mass or less, or 96.00% by mass or less.
＜成分（Ｂ）：チアジアゾール系化合物＞
本発明の一態様の潤滑油組成物は、成分（Ｂ）として、チアジアゾール系化合物を含有することで、耐スカッフィング性を向上させた潤滑油組成物となり得る。成分（Ｂ）による耐スカッフィング性の向上効果は、低粘度化した潤滑油組成物においてもより効果的に発現し得る。
成分（Ｂ）は、単独で用いてもよく、２種以上を併用してもよい。
ただし、成分（Ｂ）は、銅溶出量の増大や酸化安定性の低下を引き起こす要因ともなる。そのため、本発明の一態様の潤滑油組成物では、成分（Ｂ）の含有量を、当該潤滑油組成物の全量（１００質量％）基準で、０．６０質量％未満に制限している。つまり、成分（Ｂ）の含有量が０．６０質量％以上である潤滑油組成物は、銅溶出量の増大や酸化安定性の低下が生じ易い。 <Component (B): Thiadiazole compound>
The lubricating oil composition of one aspect of the present invention can be a lubricating oil composition with improved scuffing resistance by containing a thiadiazole-based compound as the component (B). The scuffing resistance-improving effect of component (B) can be more effectively exhibited even in a lubricating oil composition with a low viscosity.
Component (B) may be used alone or in combination of two or more.
However, the component (B) also causes an increase in copper elution and a decrease in oxidation stability. Therefore, in the lubricating oil composition of one aspect of the present invention, the content of component (B) is limited to less than 0.60% by mass based on the total amount (100% by mass) of the lubricating oil composition. That is, a lubricating oil composition having a component (B) content of 0.60% by mass or more tends to cause an increase in copper elution and a decrease in oxidation stability.
本発明の一態様の潤滑油組成物は、成分（Ｂ）として、チアジアゾール系化合物を含有することで、耐スカッフィング性を向上させた潤滑油組成物となり得る。成分（Ｂ）による耐スカッフィング性の向上効果は、低粘度化した潤滑油組成物においてもより効果的に発現し得る。
成分（Ｂ）は、単独で用いてもよく、２種以上を併用してもよい。
ただし、成分（Ｂ）は、銅溶出量の増大や酸化安定性の低下を引き起こす要因ともなる。そのため、本発明の一態様の潤滑油組成物では、成分（Ｂ）の含有量を、当該潤滑油組成物の全量（１００質量％）基準で、０．６０質量％未満に制限している。つまり、成分（Ｂ）の含有量が０．６０質量％以上である潤滑油組成物は、銅溶出量の増大や酸化安定性の低下が生じ易い。 <Component (B): Thiadiazole compound>
The lubricating oil composition of one aspect of the present invention can be a lubricating oil composition with improved scuffing resistance by containing a thiadiazole-based compound as the component (B). The scuffing resistance-improving effect of component (B) can be more effectively exhibited even in a lubricating oil composition with a low viscosity.
Component (B) may be used alone or in combination of two or more.
However, the component (B) also causes an increase in copper elution and a decrease in oxidation stability. Therefore, in the lubricating oil composition of one aspect of the present invention, the content of component (B) is limited to less than 0.60% by mass based on the total amount (100% by mass) of the lubricating oil composition. That is, a lubricating oil composition having a component (B) content of 0.60% by mass or more tends to cause an increase in copper elution and a decrease in oxidation stability.
本発明の一態様の潤滑油組成物において、銅溶出抑制効果及び酸化安定性を良好とした潤滑油組成物とする観点から、成分（Ｂ）の含有量は、前記潤滑油組成物の全量（１００質量％）基準で、０．６０質量％未満であり、好ましくは０．５７質量％以下、より好ましくは０．５５質量％以下、より好ましくは０．５２質量％以下、より好ましくは０．５０質量％以下、更に好ましくは０．４７質量％以下、更に好ましくは０．４５質量％以下、更に好ましくは０．４２質量％以下、より更に好ましくは０．４０質量％以下、特に好ましくは０．３９質量％以下であり、さらに、０．３８質量％以下、０．３７質量％以下、０．３６質量％以下、０．３５質量％以下、０．３４質量％以下、０．３３質量％以下、又は０．３２質量％以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the content of the component (B) is the total amount of the lubricating oil composition ( 100% by mass), it is less than 0.60% by mass, preferably 0.57% by mass or less, more preferably 0.55% by mass or less, more preferably 0.52% by mass or less, more preferably 0.52% by mass or less. 50% by mass or less, more preferably 0.47% by mass or less, more preferably 0.45% by mass or less, still more preferably 0.42% by mass or less, even more preferably 0.40% by mass or less, particularly preferably 0 .39% by mass or less, and further, 0.38% by mass or less, 0.37% by mass or less, 0.36% by mass or less, 0.35% by mass or less, 0.34% by mass or less, 0.33% by mass or less, or 0.32% by mass or less.
また、本発明の一態様の潤滑油組成物において、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、成分（Ｂ）の含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは０．０１質量％以上、より好ましくは０．０５質量％以上、より好ましくは０．０７質量％以上、より好ましくは０．１０質量％以上、更に好ましくは０．１２質量％以上、更に好ましくは０．１５質量％以上、更に好ましくは０．１７質量％以上、より更に好ましくは０．２０質量％以上、特に好ましくは０．２２質量％以上であり、さらに、０．２３質量％以上、０．２４質量％以上、０．２５質量％以上、０．２６質量％以上、０．２７質量％以上、又は０．２８質量％以上としてもよい。
Further, in the lubricating oil composition of one aspect of the present invention, from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, the content of the component (B) is the total amount of the lubricating oil composition (100 mass %) basis, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, more preferably 0.07% by mass or more, more preferably 0.10% by mass or more, still more preferably 0.12% by mass % by mass or more, more preferably 0.15% by mass or more, still more preferably 0.17% by mass or more, even more preferably 0.20% by mass or more, particularly preferably 0.22% by mass or more, and 0 0.23% by mass or more, 0.24% by mass or more, 0.25% by mass or more, 0.26% by mass or more, 0.27% by mass or more, or 0.28% by mass or more.
本発明の一態様の潤滑油組成物において、成分（Ｂ）の硫黄原子換算での含有量は、前記潤滑油組成物の全量（１００質量％）基準で、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、好ましくは３０質量ｐｐｍ以上、より好ましくは５０質量ｐｐｍ以上、より好ましくは１００質量ｐｐｍ以上、より好ましくは１５０質量ｐｐｍ以上、更に好ましくは２００質量ｐｐｍ以上、更に好ましくは２５０質量ｐｐｍ以上、更に好ましくは３００質量ｐｐｍ以上、より更に好ましくは４００質量ｐｐｍ以上、特に好ましくは５００質量ｐｐｍ以上であり、さらに、６００質量ｐｐｍ以上、６５０質量ｐｐｍ以上、７００質量ｐｐｍ以上、７５０質量ｐｐｍ以上、８００質量ｐｐｍ以上、８５０質量ｐｐｍ以上、９００質量ｐｐｍ以上、９５０質量ｐｐｍ以上、又は１０００質量ｐｐｍ以上としてもよく、また、銅溶出抑制効果及び酸化安定性を良好とした潤滑油組成物とする観点から、好ましくは２５００質量ｐｐｍ以下、より好ましくは２０００質量ｐｐｍ以下、より好ましくは１９００質量ｐｐｍ以下、より好ましくは１８００質量ｐｐｍ以下、更に好ましくは１７００質量ｐｐｍ以下、更に好ましくは１６００質量ｐｐｍ以下、更に好ましくは１５００質量ｐｐｍ以下、より更に好ましくは１４００質量ｐｐｍ以下、特に好ましくは１３００質量ｐｐｍ以下であり、さらに、１２５０質量ｐｐｍ以下、１２００質量ｐｐｍ以下、１１５０質量ｐｐｍ以下、１１００質量ｐｐｍ以下、又は１０５０質量ｐｐｍ以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the content of component (B) in terms of sulfur atoms is based on the total amount (100% by mass) of the lubricating oil composition, lubrication with further improved scuffing resistance From the viewpoint of an oil composition, preferably 30 mass ppm or more, more preferably 50 mass ppm or more, more preferably 100 mass ppm or more, more preferably 150 mass ppm or more, still more preferably 200 mass ppm or more, still more preferably 250 mass ppm or more, more preferably 300 mass ppm or more, still more preferably 400 mass ppm or more, particularly preferably 500 mass ppm or more, further 600 mass ppm or more, 650 mass ppm or more, 700 mass ppm or more, 750 mass ppm or more It may be mass ppm or more, 800 mass ppm or more, 850 mass ppm or more, 900 mass ppm or more, 950 mass ppm or more, or 1000 mass ppm or more, and a lubricating oil composition with good copper elution suppression effect and oxidation stability. From the viewpoint of a product, preferably 2500 mass ppm or less, more preferably 2000 mass ppm or less, more preferably 1900 mass ppm or less, more preferably 1800 mass ppm or less, still more preferably 1700 mass ppm or less, still more preferably 1600 mass ppm ppm or less, more preferably 1500 mass ppm or less, even more preferably 1400 mass ppm or less, particularly preferably 1300 mass ppm or less, further 1250 mass ppm or less, 1200 mass ppm or less, 1150 mass ppm or less, 1100 mass ppm or less, or 1050 mass ppm or less.
本発明の一態様の潤滑油組成物において、成分（Ｂ）の窒素原子換算での含有量は、前記潤滑油組成物の全量（１００質量％）基準で、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、好ましくは１０質量ｐｐｍ以上、より好ましくは３０質量ｐｐｍ以上、より好ましくは５０質量ｐｐｍ以上、より好ましくは６０質量ｐｐｍ以上、更に好ましくは７０質量ｐｐｍ以上、更に好ましくは８０質量ｐｐｍ以上、更に好ましくは９０質量ｐｐｍ以上、より更に好ましくは１００質量ｐｐｍ以上、特に好ましくは１２０質量ｐｐｍ以上であり、さらに、１３０質量ｐｐｍ以上、１４０質量ｐｐｍ以上、１５０質量ｐｐｍ以上、１６０質量ｐｐｍ以上、１７０質量ｐｐｍ以上、１８０質量ｐｐｍ以上、又は１９０質量ｐｐｍ以上としてもよく、また、銅溶出抑制効果及び酸化安定性を良好とした潤滑油組成物とする観点から、好ましくは５００質量ｐｐｍ以下、より好ましくは４５０質量ｐｐｍ以下、より好ましくは４００質量ｐｐｍ以下、より好ましくは３５０質量ｐｐｍ以下、更に好ましくは３２０質量ｐｐｍ以下、更に好ましくは３００質量ｐｐｍ以下、更に好ましくは２９０質量ｐｐｍ以下、より更に好ましくは２８０質量ｐｐｍ以下、特に好ましくは２７０質量ｐｐｍ以下であり、さらに、２６０質量ｐｐｍ以下、２５０質量ｐｐｍ以下、２４０質量ｐｐｍ以下、２３０質量ｐｐｍ以下、２２０質量ｐｐｍ以下、２１０質量ｐｐｍ以下、又は２００質量ｐｐｍ以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the content of component (B) in terms of nitrogen atoms is based on the total amount (100% by mass) of the lubricating oil composition, lubrication with further improved scuffing resistance From the viewpoint of an oil composition, preferably 10 mass ppm or more, more preferably 30 mass ppm or more, more preferably 50 mass ppm or more, more preferably 60 mass ppm or more, still more preferably 70 mass ppm or more, still more preferably 80 mass ppm or more, more preferably 90 mass ppm or more, even more preferably 100 mass ppm or more, particularly preferably 120 mass ppm or more, further 130 mass ppm or more, 140 mass ppm or more, 150 mass ppm or more, 160 It may be mass ppm or more, 170 mass ppm or more, 180 mass ppm or more, or 190 mass ppm or more, and from the viewpoint of a lubricating oil composition with good copper elution suppression effect and oxidation stability, preferably 500 mass ppm ppm or less, more preferably 450 mass ppm or less, more preferably 400 mass ppm or less, more preferably 350 mass ppm or less, still more preferably 320 mass ppm or less, still more preferably 300 mass ppm or less, still more preferably 290 mass ppm or less , More preferably 280 mass ppm or less, particularly preferably 270 mass ppm or less, further 260 mass ppm or less, 250 mass ppm or less, 240 mass ppm or less, 230 mass ppm or less, 220 mass ppm or less, 210 mass ppm or less, or 200 mass ppm or less.
本発明の一態様で用いる成分（Ｂ）であるチアジアゾール系化合物としては、チアジアゾール環を有する化合物であればよいが、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、下記一般式（ｂ－１）～（ｂ－４）のいずれかで表される化合物を含むことが好ましく、少なくとも下記一般式（ｂ－１）で表される化合物を含むことがより好ましい。
なお、成分（Ｂ）は、単独で用いてもよく、２種以上を併用してもよい。 The thiadiazole-based compound that is the component (B) used in one embodiment of the present invention may be any compound having a thiadiazole ring. It preferably contains a compound represented by any one of (b-1) to (b-4), and more preferably contains at least a compound represented by the following general formula (b-1).
In addition, the component (B) may be used alone or in combination of two or more.
なお、成分（Ｂ）は、単独で用いてもよく、２種以上を併用してもよい。 The thiadiazole-based compound that is the component (B) used in one embodiment of the present invention may be any compound having a thiadiazole ring. It preferably contains a compound represented by any one of (b-1) to (b-4), and more preferably contains at least a compound represented by the following general formula (b-1).
In addition, the component (B) may be used alone or in combination of two or more.
上記式中、Ｒ１及びＲ２は、それぞれ独立して、炭化水素基である。
ｍ及びｎは、それぞれ独立して、１～１０の整数であるが、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、好ましくは１～６の整数、より好ましくは１～４の整数、更に好ましくは２～３の整数、より更に好ましくは２である。 In the formula above, R 1 and R 2 are each independently a hydrocarbon group.
m and n are each independently an integer of 1 to 10, but from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, preferably an integer of 1 to 6, more preferably 1 to 4 is an integer of , more preferably an integer of 2 to 3, and even more preferably 2.
ｍ及びｎは、それぞれ独立して、１～１０の整数であるが、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、好ましくは１～６の整数、より好ましくは１～４の整数、更に好ましくは２～３の整数、より更に好ましくは２である。 In the formula above, R 1 and R 2 are each independently a hydrocarbon group.
m and n are each independently an integer of 1 to 10, but from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, preferably an integer of 1 to 6, more preferably 1 to 4 is an integer of , more preferably an integer of 2 to 3, and even more preferably 2.
Ｒ１及びＲ２として選択し得る、前記炭化水素基としては、例えば、メチル基、エチル基、プロピル基（ｎ－プロピル基、イソプロピル基）、ブチル基（ｎ－ブチル基、ｓ－ブチル基、ｔ－ブチル基、イソブチル基）、ペンチル基、ヘキシル基、ヘプチル基、オクチル基、２－エチルヘキシル基、ノニル基、１，１－ジメチルヘプチル基、デシル基、ウンデシル基、ドデシル基、トリデシル基、テトラデシル基、ペンタデシル基、ヘキサデシル基、ヘプタデシル基、オクタデシル基等の直鎖又は分岐鎖のアルキル基；エテニル基、プロぺニル基、ブテニル基、ペンテニル基、ヘキセニル基、ヘプテニル基、オクテニル基、ノネニル基、デセニル基、ウンデセニル基、ドデセニル基、トリデセニル基、テトラデセニル基、ペンタデセニル基等の直鎖又は分岐鎖のアルケニル基；シクロヘキシル基、ジメチルシクロヘキシル基、エチルシクロヘキシル基、プロピルシクロヘキシル基、ブチルシクロヘキシル基、ヘプチルシクロヘキシル基等のアルキル基を有してもよいシクロアルキル基；フェニル基、ナフチル基、アントラセニル基、ビフェニル基、ターフェニル基等のアリール基；トリル基、ジメチルフェニル基、ブチルフェニル基、ノニルフェニル基、メチルベンジル基、ジメチルナフチル基等のアルキルアリール基；フェニルメチル基、フェニルエチル基、ジフェニルメチル基等のアリールアルキル基等が挙げられる。
The hydrocarbon groups that can be selected as R 1 and R 2 include, for example, methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group, isobutyl group), pentyl group, hexyl group, heptyl group, octyl group, 2-ethylhexyl group, nonyl group, 1,1-dimethylheptyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl linear or branched alkyl groups such as pentadecyl, hexadecyl, heptadecyl and octadecyl groups; ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, Linear or branched alkenyl groups such as decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group; cyclohexyl group, dimethylcyclohexyl group, ethylcyclohexyl group, propylcyclohexyl group, butylcyclohexyl group, heptylcyclohexyl group cycloalkyl group optionally having an alkyl group such as; phenyl group, naphthyl group, anthracenyl group, biphenyl group, aryl group such as terphenyl group; tolyl group, dimethylphenyl group, butylphenyl group, nonylphenyl group, methyl Alkylaryl groups such as benzyl group and dimethylnaphthyl group; and arylalkyl groups such as phenylmethyl group, phenylethyl group and diphenylmethyl group.
Ｒ１及びＲ２として選択し得る、前記炭化水素基の炭素数は、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、好ましくは１以上、より好ましくは２以上、更に好ましくは３以上、より更に好ましくは５以上であり、さらに、７以上、８以上、又は９以上としてもよく、また、好ましくは３０以下、より好ましくは２４以下、より好ましくは２０以下、より好ましくは１８以下、更に好ましくは１６以下、更に好ましくは１４以下、より更に好ましくは１２以下であり、さらに、１１以下、又は１０以下としてもよい。
The number of carbon atoms in the hydrocarbon group that can be selected as R 1 and R 2 is preferably 1 or more, more preferably 2 or more, and still more preferably 3 or more, more preferably 5 or more, and may be 7 or more, 8 or more, or 9 or more, preferably 30 or less, more preferably 24 or less, more preferably 20 or less, more preferably 18 Below, more preferably 16 or less, still more preferably 14 or less, still more preferably 12 or less, and may be 11 or less, or 10 or less.
これらの中でも、Ｒ１及びＲ２は、それぞれ独立して、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、アルキル基であることが好ましく、耐スカッフィング性と共に、銅腐食防止性を向上させて銅の溶出を効果的に抑制し得る潤滑油組成物とする観点から、分岐鎖アルキル基であることがより好ましく、炭素数５以上の分岐鎖アルキル基であることが更に好ましい。
分岐鎖アルキル基の炭素数は、上記観点から、好ましくは５以上であるが、より好ましくは７以上、更に好ましくは８以上、より更に好ましくは９以上であり、また、好ましくは３０以下、より好ましくは２４以下、より好ましくは２０以下、より好ましくは１８以下、更に好ましくは１６以下、更に好ましくは１４以下、より更に好ましくは１２以下であり、さらに、１１以下、又は１０以下としてもよい。 Among these, R 1 and R 2 are each independently preferably an alkyl group from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, and together with scuffing resistance, copper corrosion prevention from the viewpoint of obtaining a lubricating oil composition capable of effectively suppressing the elution of copper by improving the branched-chain alkyl group, more preferably a branched-chain alkyl group having 5 or more carbon atoms.
From the above viewpoint, the number of carbon atoms in the branched alkyl group is preferably 5 or more, more preferably 7 or more, still more preferably 8 or more, still more preferably 9 or more, and preferably 30 or less. It is preferably 24 or less, more preferably 20 or less, more preferably 18 or less, still more preferably 16 or less, even more preferably 14 or less, still more preferably 12 or less, and may be 11 or less, or 10 or less.
分岐鎖アルキル基の炭素数は、上記観点から、好ましくは５以上であるが、より好ましくは７以上、更に好ましくは８以上、より更に好ましくは９以上であり、また、好ましくは３０以下、より好ましくは２４以下、より好ましくは２０以下、より好ましくは１８以下、更に好ましくは１６以下、更に好ましくは１４以下、より更に好ましくは１２以下であり、さらに、１１以下、又は１０以下としてもよい。 Among these, R 1 and R 2 are each independently preferably an alkyl group from the viewpoint of obtaining a lubricating oil composition with further improved scuffing resistance, and together with scuffing resistance, copper corrosion prevention from the viewpoint of obtaining a lubricating oil composition capable of effectively suppressing the elution of copper by improving the branched-chain alkyl group, more preferably a branched-chain alkyl group having 5 or more carbon atoms.
From the above viewpoint, the number of carbon atoms in the branched alkyl group is preferably 5 or more, more preferably 7 or more, still more preferably 8 or more, still more preferably 9 or more, and preferably 30 or less. It is preferably 24 or less, more preferably 20 or less, more preferably 18 or less, still more preferably 16 or less, even more preferably 14 or less, still more preferably 12 or less, and may be 11 or less, or 10 or less.
本発明の一態様の潤滑油組成物において、耐スカッフィング性をより向上させた潤滑油組成物とする観点から、前記一般式（ｂ－１）～（ｂ－４）のいずれかで表される化合物の合計含有割合は、当該潤滑油組成物に含まれる成分（Ｂ）の全量（１００質量％）基準で、好ましくは６０～１００質量％、より好ましくは７０～１００質量％、更に好ましくは８０～１００質量％、より更に好ましくは９０～１００質量％、特に好ましくは９５～１００質量％である。
In the lubricating oil composition of one aspect of the present invention, from the viewpoint of a lubricating oil composition with further improved scuffing resistance, represented by any of the general formulas (b-1) to (b-4) The total content of the compounds is based on the total amount (100% by mass) of component (B) contained in the lubricating oil composition, preferably 60 to 100% by mass, more preferably 70 to 100% by mass, still more preferably 80 ~100% by mass, more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass.
本発明の一態様の潤滑油組成物において、上記観点から、前記一般式（ｂ－１）で表される化合物の含有割合は、当該潤滑油組成物に含まれる成分（Ｂ）の全量（１００質量％）基準で、好ましくは５０～１００質量％、より好ましくは６０～１００質量％、更に好ましくは７０～１００質量％、より更に好ましくは８０～１００質量％、特に好ましくは９０～１００質量％である。
In the lubricating oil composition of one aspect of the present invention, from the above viewpoint, the content of the compound represented by the general formula (b-1) is the total amount of the component (B) contained in the lubricating oil composition (100 %), preferably 50 to 100% by mass, more preferably 60 to 100% by mass, still more preferably 70 to 100% by mass, even more preferably 80 to 100% by mass, particularly preferably 90 to 100% by mass is.
なお、本発明の一態様の潤滑油組成物において、下記一般式（ｂ－ｘ）で表される化合物の含有割合が、当該潤滑油組成物に含まれる成分（Ｂ）の全量（１００質量％）基準で、好ましくは１０質量％未満、より好ましくは８質量％未満、更に好ましくは５質量％未満、より更に好ましくは３質量％未満、特に好ましくは１質量％未満である。
〔上記式中、Ｒａは、水素原子又はメチル基であり、Ｒｂは、炭素数１～４のアルキル基である。ｐは、０又は１である。〕
In the lubricating oil composition of one aspect of the present invention, the content of the compound represented by the following general formula (bx) is the total amount of the component (B) contained in the lubricating oil composition (100 mass% ) basis, preferably less than 10% by mass, more preferably less than 8% by mass, even more preferably less than 5% by mass, even more preferably less than 3% by mass, and particularly preferably less than 1% by mass.
[In the above formula, R a is a hydrogen atom or a methyl group, and R b is an alkyl group having 1 to 4 carbon atoms. p is 0 or 1; ]
本発明の一態様の潤滑油組成物において、耐スカッフィング性をより向上させると共に、銅溶出抑制効果を良好とした潤滑油組成物とする観点から、成分（Ｂ）が、分岐鎖アルキル基を有するチアジアゾール系化合物（Ｂ１）（以下、「成分（Ｂ１）」ともいう）を含むことが好ましい。
上記観点から、成分（Ｂ１）の含有割合は、前記潤滑油組成物に含まれる成分（Ｂ）の全量（１００質量％）基準で、好ましくは５０～１００質量％、より好ましくは６０～１００質量％、より好ましくは７０～１００質量％、更に好ましくは８０～１００質量％、より更に好ましくは９０～１００質量％、特に好ましくは９５～１００質量％である。 In the lubricating oil composition of one aspect of the present invention, the component (B) has a branched chain alkyl group from the viewpoint of further improving the scuffing resistance and providing a lubricating oil composition having a good effect of suppressing copper elution. It preferably contains a thiadiazole compound (B1) (hereinafter also referred to as "component (B1)").
From the above viewpoint, the content of component (B1) is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, based on the total amount (100% by mass) of component (B) contained in the lubricating oil composition. %, more preferably 70 to 100% by mass, still more preferably 80 to 100% by mass, even more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass.
上記観点から、成分（Ｂ１）の含有割合は、前記潤滑油組成物に含まれる成分（Ｂ）の全量（１００質量％）基準で、好ましくは５０～１００質量％、より好ましくは６０～１００質量％、より好ましくは７０～１００質量％、更に好ましくは８０～１００質量％、より更に好ましくは９０～１００質量％、特に好ましくは９５～１００質量％である。 In the lubricating oil composition of one aspect of the present invention, the component (B) has a branched chain alkyl group from the viewpoint of further improving the scuffing resistance and providing a lubricating oil composition having a good effect of suppressing copper elution. It preferably contains a thiadiazole compound (B1) (hereinafter also referred to as "component (B1)").
From the above viewpoint, the content of component (B1) is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, based on the total amount (100% by mass) of component (B) contained in the lubricating oil composition. %, more preferably 70 to 100% by mass, still more preferably 80 to 100% by mass, even more preferably 90 to 100% by mass, particularly preferably 95 to 100% by mass.
成分（Ｂ１）が有する分岐鎖アルキル基の炭素数は、耐スカッフィング性をより向上させると共に、銅溶出抑制効果を良好とした潤滑油組成物とする観点から、好ましくは５以上、より好ましくは７以上、更に好ましくは８以上、より更に好ましくは９以上であり、また、好ましくは３０以下、より好ましくは２４以下、より好ましくは２０以下、より好ましくは１８以下、更に好ましくは１６以下、更に好ましくは１４以下、より更に好ましくは１２以下であり、さらに、１１以下、又は１０以下としてもよい。
The number of carbon atoms in the branched alkyl group of the component (B1) is preferably 5 or more, more preferably 7, from the viewpoint of improving scuffing resistance and providing a lubricating oil composition having a good effect of suppressing copper elution. more preferably 8 or more, still more preferably 9 or more, preferably 30 or less, more preferably 24 or less, more preferably 20 or less, more preferably 18 or less, still more preferably 16 or less, still more preferably is 14 or less, more preferably 12 or less, and may be 11 or less, or 10 or less.
耐スカッフィング性をより向上させると共に、銅溶出抑制効果を良好とした潤滑油組成物とする観点から、成分（Ｂ１）は、前記一般式（ｂ－１）～（ｂ－４）のいずれかで表され、各式中のＲ１及びＲ２が、それぞれ独立して、分岐鎖アルキル基である化合物であることが好ましく、前記一般式（ｂ－１）で表され、式中のＲ１及びＲ２が、それぞれ独立して、分岐鎖アルキル基である化合物であることがより好ましい。なお、分岐鎖アルキル基の炭素数の好適範囲は上述のとおりである。
From the viewpoint of further improving the scuffing resistance and making a lubricating oil composition having a good effect of suppressing copper elution, the component (B1) is represented by any one of the general formulas (b-1) to (b-4). R 1 and R 2 in each formula are each independently a branched alkyl group, preferably a compound represented by the general formula (b-1), wherein R 1 and R 2 in the formula More preferred are compounds in which each R 2 is independently a branched alkyl group. The preferred range of the number of carbon atoms in the branched-chain alkyl group is as described above.
＜硫化オレフィン＞
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、硫化オレフィンを含有してもよい。ただし、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性を良好とした潤滑油組成物とする観点から、硫化オレフィンの含有量は少ないほど好ましい。
上記観点から、本発明の一態様の潤滑油組成物において、硫化オレフィンの含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは０．２０質量％未満、より好ましくは０．１８質量％未満、より好ましくは０．１５質量％未満、更に好ましくは０．１２質量％未満、より更に好ましくは０．１０質量％未満、特に好ましくは０．０７質量％未満であり、さらに、０．０５質量％未満、０．０４質量％未満、０．０３質量％未満、０．０２質量％未満、０．０１質量％未満、又は０．００１質量％未満としてもよい。 <Sulfurized Olefin>
The lubricating oil composition of one aspect of the present invention may contain a sulfurized olefin within a range that does not impair the effects of the present invention. However, from the viewpoint of obtaining a lubricating oil composition having good scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties, it is preferable that the content of the sulfide olefin is as small as possible.
From the above viewpoint, in the lubricating oil composition of one aspect of the present invention, the content of the sulfurized olefin is preferably less than 0.20% by mass, more preferably less than 0.20% by mass, based on the total amount (100% by mass) of the lubricating oil composition less than 0.18% by mass, more preferably less than 0.15% by mass, even more preferably less than 0.12% by mass, even more preferably less than 0.10% by mass, particularly preferably less than 0.07% by mass; Furthermore, it may be less than 0.05% by weight, less than 0.04% by weight, less than 0.03% by weight, less than 0.02% by weight, less than 0.01% by weight, or less than 0.001% by weight.
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、硫化オレフィンを含有してもよい。ただし、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性を良好とした潤滑油組成物とする観点から、硫化オレフィンの含有量は少ないほど好ましい。
上記観点から、本発明の一態様の潤滑油組成物において、硫化オレフィンの含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは０．２０質量％未満、より好ましくは０．１８質量％未満、より好ましくは０．１５質量％未満、更に好ましくは０．１２質量％未満、より更に好ましくは０．１０質量％未満、特に好ましくは０．０７質量％未満であり、さらに、０．０５質量％未満、０．０４質量％未満、０．０３質量％未満、０．０２質量％未満、０．０１質量％未満、又は０．００１質量％未満としてもよい。 <Sulfurized Olefin>
The lubricating oil composition of one aspect of the present invention may contain a sulfurized olefin within a range that does not impair the effects of the present invention. However, from the viewpoint of obtaining a lubricating oil composition having good scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties, it is preferable that the content of the sulfide olefin is as small as possible.
From the above viewpoint, in the lubricating oil composition of one aspect of the present invention, the content of the sulfurized olefin is preferably less than 0.20% by mass, more preferably less than 0.20% by mass, based on the total amount (100% by mass) of the lubricating oil composition less than 0.18% by mass, more preferably less than 0.15% by mass, even more preferably less than 0.12% by mass, even more preferably less than 0.10% by mass, particularly preferably less than 0.07% by mass; Furthermore, it may be less than 0.05% by weight, less than 0.04% by weight, less than 0.03% by weight, less than 0.02% by weight, less than 0.01% by weight, or less than 0.001% by weight.
硫化オレフィンとしては、例えば、下記一般式（ｉ）で表される化合物が挙げられる。
Ｒ－（Ｓ）ｑ－Ｒ’ （ｉ）
上記式（ｉ）中、Ｒは、炭素数２～２０のアルケニル基であり、Ｒ’は、炭素数２～２０のアルケニル基又は炭素数２～２０のアルキル基であり、ｑは１～１０の整数である。 Examples of sulfurized olefins include compounds represented by the following general formula (i).
R-(S) q -R' (i)
In the above formula (i), R is an alkenyl group having 2 to 20 carbon atoms, R' is an alkenyl group having 2 to 20 carbon atoms or an alkyl group having 2 to 20 carbon atoms, and q is 1 to 10 is an integer of
Ｒ－（Ｓ）ｑ－Ｒ’ （ｉ）
上記式（ｉ）中、Ｒは、炭素数２～２０のアルケニル基であり、Ｒ’は、炭素数２～２０のアルケニル基又は炭素数２～２０のアルキル基であり、ｑは１～１０の整数である。 Examples of sulfurized olefins include compounds represented by the following general formula (i).
R-(S) q -R' (i)
In the above formula (i), R is an alkenyl group having 2 to 20 carbon atoms, R' is an alkenyl group having 2 to 20 carbon atoms or an alkyl group having 2 to 20 carbon atoms, and q is 1 to 10 is an integer of
＜成分（Ｃ）：ホウ素変性アルケニルコハク酸イミド＞
本発明の一態様の潤滑油組成物は、成分（Ｃ）として、ホウ素変性アルケニルコハク酸イミドを含有する。上述のとおり、成分（Ｂ）は、耐スカッフィング性の向上には寄与するが、同時に銅溶出量の増大や酸化安定性の低下の要因ともなる。そこで、本発明の一態様の潤滑油組成物では、成分（Ｂ）と共に、成分（Ｃ）を含有することで、優れた耐スカッフィング性を発現しつつ、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物としている。
なお、成分（Ｃ）は、単独で用いてもよく、２種以上を併用してもよい。 <Component (C): Boron-modified alkenyl succinimide>
A lubricating oil composition of one aspect of the present invention contains a boron-modified alkenylsuccinimide as component (C). As described above, component (B) contributes to the improvement of scuffing resistance, but at the same time causes an increase in copper elution and a decrease in oxidation stability. Therefore, in the lubricating oil composition of one aspect of the present invention, by containing the component (C) together with the component (B), excellent scuffing resistance is exhibited, and the effect of suppressing copper elution and oxidation stability are excellent. It is a lubricating oil composition.
In addition, component (C) may be used independently and may use 2 or more types together.
本発明の一態様の潤滑油組成物は、成分（Ｃ）として、ホウ素変性アルケニルコハク酸イミドを含有する。上述のとおり、成分（Ｂ）は、耐スカッフィング性の向上には寄与するが、同時に銅溶出量の増大や酸化安定性の低下の要因ともなる。そこで、本発明の一態様の潤滑油組成物では、成分（Ｂ）と共に、成分（Ｃ）を含有することで、優れた耐スカッフィング性を発現しつつ、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物としている。
なお、成分（Ｃ）は、単独で用いてもよく、２種以上を併用してもよい。 <Component (C): Boron-modified alkenyl succinimide>
A lubricating oil composition of one aspect of the present invention contains a boron-modified alkenylsuccinimide as component (C). As described above, component (B) contributes to the improvement of scuffing resistance, but at the same time causes an increase in copper elution and a decrease in oxidation stability. Therefore, in the lubricating oil composition of one aspect of the present invention, by containing the component (C) together with the component (B), excellent scuffing resistance is exhibited, and the effect of suppressing copper elution and oxidation stability are excellent. It is a lubricating oil composition.
In addition, component (C) may be used independently and may use 2 or more types together.
本発明の一態様の潤滑油組成物において、成分（Ｃ）は、下記要件（Ｉ）及び（II）を満たす。
・要件（Ｉ）：成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上である。
・要件（II）：成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である。
要件（Ｉ）を満たすように、前記含有量比〔Ｂ／Ｎ〕を０．３５以上とすることで、銅溶出抑制効果及び酸化安定性を向上させた潤滑油組成物とすることができる。一方で、前記含有量比〔Ｂ／Ｎ〕が０．３５未満である潤滑油組成物は、銅溶出抑制効果及び酸化安定性が劣る。
また、要件（II）を満たすように、成分（Ｃ）に由来するホウ素原子の含有量を調整することで、耐スカッフィング性及び絶縁性を良好に保持した潤滑油組成物とすることができる。つまり、成分（Ｃ）に由来するホウ素原子の含有量が３００質量ｐｐｍ超である潤滑油組成物は、耐スカッフィング性及び絶縁性が劣る。 In the lubricating oil composition of one aspect of the present invention, component (C) satisfies the following requirements (I) and (II).
Requirement (I): The content ratio [B/N] of boron atoms and nitrogen atoms derived from component (C) is 0.35 or more in mass ratio.
Requirement (II): The content of boron atoms derived from component (C) is 300 mass ppm or less based on the total amount of the lubricating oil composition.
By setting the content ratio [B/N] to 0.35 or more so as to satisfy the requirement (I), it is possible to obtain a lubricating oil composition with improved copper elution inhibitory effect and oxidation stability. On the other hand, a lubricating oil composition having a content ratio [B/N] of less than 0.35 is inferior in copper elution inhibitory effect and oxidation stability.
In addition, by adjusting the content of boron atoms derived from the component (C) so as to satisfy the requirement (II), it is possible to obtain a lubricating oil composition that satisfactorily maintains scuffing resistance and insulation properties. That is, a lubricating oil composition having a boron atom content of more than 300 ppm by mass derived from component (C) is inferior in scuffing resistance and insulating properties.
・要件（Ｉ）：成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上である。
・要件（II）：成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である。
要件（Ｉ）を満たすように、前記含有量比〔Ｂ／Ｎ〕を０．３５以上とすることで、銅溶出抑制効果及び酸化安定性を向上させた潤滑油組成物とすることができる。一方で、前記含有量比〔Ｂ／Ｎ〕が０．３５未満である潤滑油組成物は、銅溶出抑制効果及び酸化安定性が劣る。
また、要件（II）を満たすように、成分（Ｃ）に由来するホウ素原子の含有量を調整することで、耐スカッフィング性及び絶縁性を良好に保持した潤滑油組成物とすることができる。つまり、成分（Ｃ）に由来するホウ素原子の含有量が３００質量ｐｐｍ超である潤滑油組成物は、耐スカッフィング性及び絶縁性が劣る。 In the lubricating oil composition of one aspect of the present invention, component (C) satisfies the following requirements (I) and (II).
Requirement (I): The content ratio [B/N] of boron atoms and nitrogen atoms derived from component (C) is 0.35 or more in mass ratio.
Requirement (II): The content of boron atoms derived from component (C) is 300 mass ppm or less based on the total amount of the lubricating oil composition.
By setting the content ratio [B/N] to 0.35 or more so as to satisfy the requirement (I), it is possible to obtain a lubricating oil composition with improved copper elution inhibitory effect and oxidation stability. On the other hand, a lubricating oil composition having a content ratio [B/N] of less than 0.35 is inferior in copper elution inhibitory effect and oxidation stability.
In addition, by adjusting the content of boron atoms derived from the component (C) so as to satisfy the requirement (II), it is possible to obtain a lubricating oil composition that satisfactorily maintains scuffing resistance and insulation properties. That is, a lubricating oil composition having a boron atom content of more than 300 ppm by mass derived from component (C) is inferior in scuffing resistance and insulating properties.
本発明の一態様の潤滑油組成物において、銅溶出抑制効果及び酸化安定性をより向上させた潤滑油組成物とする観点から、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］は、質量比で、上記要件（Ｉ）のとおり０．３５以上であり、好ましくは０．４０以上、より好ましくは０．４５以上、より好ましくは０．５０以上、より好ましくは０．５５以上、更に好ましくは０．６０以上、更に好ましくは０．６５以上、更に好ましくは０．７０以上、より更に好ましくは０．７５以上、特に好ましくは０．８０以上であり、さらに、０．８５以上、又は０．９０以上としてもよい。
また、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］は、質量比で、２．０以下、１．９以下、１．８以下、１．７以下、１．６以下、１．５以下、１．４以下、又は１．３以下としてもよい。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of providing a lubricating oil composition with further improved copper elution suppression effect and oxidation stability, the content ratio of boron atoms and nitrogen atoms derived from the component (C) [B/N] is a mass ratio of 0.35 or more, preferably 0.40 or more, more preferably 0.45 or more, more preferably 0.50 or more, more preferably 0.50 or more, as in the above requirement (I) is 0.55 or more, more preferably 0.60 or more, more preferably 0.65 or more, still more preferably 0.70 or more, even more preferably 0.75 or more, particularly preferably 0.80 or more, and further , 0.85 or more, or 0.90 or more.
In addition, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 2.0 or less, 1.9 or less, 1.8 or less, 1.7 or less, 1 .6 or less, 1.5 or less, 1.4 or less, or 1.3 or less.
また、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］は、質量比で、２．０以下、１．９以下、１．８以下、１．７以下、１．６以下、１．５以下、１．４以下、又は１．３以下としてもよい。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of providing a lubricating oil composition with further improved copper elution suppression effect and oxidation stability, the content ratio of boron atoms and nitrogen atoms derived from the component (C) [B/N] is a mass ratio of 0.35 or more, preferably 0.40 or more, more preferably 0.45 or more, more preferably 0.50 or more, more preferably 0.50 or more, as in the above requirement (I) is 0.55 or more, more preferably 0.60 or more, more preferably 0.65 or more, still more preferably 0.70 or more, even more preferably 0.75 or more, particularly preferably 0.80 or more, and further , 0.85 or more, or 0.90 or more.
In addition, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 2.0 or less, 1.9 or less, 1.8 or less, 1.7 or less, 1 .6 or less, 1.5 or less, 1.4 or less, or 1.3 or less.
本発明の一態様の潤滑油組成物において、耐スカッフィング性及び絶縁性を良好に保持した潤滑油組成物とする観点から、成分（Ｃ）に由来するホウ素原子の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、３００質量ｐｐｍ以下であり、好ましくは２８０質量ｐｐｍ以下、より好ましくは２５０質量ｐｐｍ以下、より好ましくは２２０質量ｐｐｍ以下、より好ましくは２００質量ｐｐｍ以下、更に好ましくは１８０質量ｐｐｍ以下、更に好ましくは１６０質量ｐｐｍ以下、更に好ましくは１５０質量ｐｐｍ以下、より更に好ましくは１４０質量ｐｐｍ以下、特に好ましくは１３０質量ｐｐｍ以下であり、さらに、１２５質量ｐｐｍ以下、１２０質量ｐｐｍ以下、１１５質量ｐｐｍ以下、又は１１０質量ｐｐｍ以下としてもよい。
また、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物とする観点から、成分（Ｃ）に由来するホウ素原子の含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは３．０質量ｐｐｍ以上、より好ましくは５．０質量ｐｐｍ以上、より好ましくは７．０質量ｐｐｍ以上、より好ましくは１０．０質量ｐｐｍ以上、更に好ましくは１２．０質量ｐｐｍ以上、更に好ましくは１５．０質量ｐｐｍ以上、更に好ましくは１７．０質量ｐｐｍ以上、より更に好ましくは２０．０質量ｐｐｍ以上、特に好ましくは２２．０質量ｐｐｍ以上であり、さらに、２５．０質量ｐｐｍ以上、３０．０質量ｐｐｍ以上、３５．０質量ｐｐｍ以上、４０．０質量ｐｐｍ以上、４５．０質量ｐｐｍ以上、５０．０質量ｐｐｍ以上、５５．０質量ｐｐｍ以上、６０．０質量ｐｐｍ以上、６５．０質量ｐｐｍ以上、７０．０質量ｐｐｍ以上、又は７５．０質量ｐｐｍ以上としてもよい。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of obtaining a lubricating oil composition that satisfactorily maintains scuffing resistance and insulating properties, the content of boron atoms derived from the component (C) is the lubricating oil composition Based on the total amount (100% by mass) of the product, it is 300 mass ppm or less, preferably 280 mass ppm or less, more preferably 250 mass ppm or less, more preferably 220 mass ppm or less, more preferably 200 mass ppm or less, and further Preferably 180 mass ppm or less, more preferably 160 mass ppm or less, still more preferably 150 mass ppm or less, even more preferably 140 mass ppm or less, particularly preferably 130 mass ppm or less, and further 125 mass ppm or less, 120 It may be mass ppm or less, 115 mass ppm or less, or 110 mass ppm or less.
In addition, from the viewpoint of making a lubricating oil composition excellent in copper elution inhibitory effect and oxidation stability, the content of boron atoms derived from the component (C) is based on the total amount (100% by mass) of the lubricating oil composition. , preferably 3.0 mass ppm or more, more preferably 5.0 mass ppm or more, more preferably 7.0 mass ppm or more, more preferably 10.0 mass ppm or more, still more preferably 12.0 mass ppm or more, More preferably 15.0 mass ppm or more, still more preferably 17.0 mass ppm or more, still more preferably 20.0 mass ppm or more, particularly preferably 22.0 mass ppm or more, and further preferably 25.0 mass ppm Above, 30.0 mass ppm or more, 35.0 mass ppm or more, 40.0 mass ppm or more, 45.0 mass ppm or more, 50.0 mass ppm or more, 55.0 mass ppm or more, 60.0 mass ppm or more , 65.0 mass ppm or more, 70.0 mass ppm or more, or 75.0 mass ppm or more.
また、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物とする観点から、成分（Ｃ）に由来するホウ素原子の含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは３．０質量ｐｐｍ以上、より好ましくは５．０質量ｐｐｍ以上、より好ましくは７．０質量ｐｐｍ以上、より好ましくは１０．０質量ｐｐｍ以上、更に好ましくは１２．０質量ｐｐｍ以上、更に好ましくは１５．０質量ｐｐｍ以上、更に好ましくは１７．０質量ｐｐｍ以上、より更に好ましくは２０．０質量ｐｐｍ以上、特に好ましくは２２．０質量ｐｐｍ以上であり、さらに、２５．０質量ｐｐｍ以上、３０．０質量ｐｐｍ以上、３５．０質量ｐｐｍ以上、４０．０質量ｐｐｍ以上、４５．０質量ｐｐｍ以上、５０．０質量ｐｐｍ以上、５５．０質量ｐｐｍ以上、６０．０質量ｐｐｍ以上、６５．０質量ｐｐｍ以上、７０．０質量ｐｐｍ以上、又は７５．０質量ｐｐｍ以上としてもよい。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of obtaining a lubricating oil composition that satisfactorily maintains scuffing resistance and insulating properties, the content of boron atoms derived from the component (C) is the lubricating oil composition Based on the total amount (100% by mass) of the product, it is 300 mass ppm or less, preferably 280 mass ppm or less, more preferably 250 mass ppm or less, more preferably 220 mass ppm or less, more preferably 200 mass ppm or less, and further Preferably 180 mass ppm or less, more preferably 160 mass ppm or less, still more preferably 150 mass ppm or less, even more preferably 140 mass ppm or less, particularly preferably 130 mass ppm or less, and further 125 mass ppm or less, 120 It may be mass ppm or less, 115 mass ppm or less, or 110 mass ppm or less.
In addition, from the viewpoint of making a lubricating oil composition excellent in copper elution inhibitory effect and oxidation stability, the content of boron atoms derived from the component (C) is based on the total amount (100% by mass) of the lubricating oil composition. , preferably 3.0 mass ppm or more, more preferably 5.0 mass ppm or more, more preferably 7.0 mass ppm or more, more preferably 10.0 mass ppm or more, still more preferably 12.0 mass ppm or more, More preferably 15.0 mass ppm or more, still more preferably 17.0 mass ppm or more, still more preferably 20.0 mass ppm or more, particularly preferably 22.0 mass ppm or more, and further preferably 25.0 mass ppm Above, 30.0 mass ppm or more, 35.0 mass ppm or more, 40.0 mass ppm or more, 45.0 mass ppm or more, 50.0 mass ppm or more, 55.0 mass ppm or more, 60.0 mass ppm or more , 65.0 mass ppm or more, 70.0 mass ppm or more, or 75.0 mass ppm or more.
本発明の一態様の潤滑油組成物において、耐スカッフィング性及び絶縁性をより良好に保持し、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物とする観点から、成分（Ｃ）に由来する窒素原子の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、好ましくは５．０質量ｐｐｍ以上、より好ましくは７．０質量ｐｐｍ以上、より好ましくは９．０質量ｐｐｍ以上、より好ましくは１０．０質量ｐｐｍ以上、更に好ましくは１２．０質量ｐｐｍ以上、更に好ましくは１５．０質量ｐｐｍ以上、更に好ましくは１７．０質量ｐｐｍ以上、より更に好ましくは２０．０質量ｐｐｍ以上、特に好ましくは２２．０質量ｐｐｍ以上であり、さらに、２５．０質量ｐｐｍ以上、３０．０質量ｐｐｍ以上、３５．０質量ｐｐｍ以上、４０．０質量ｐｐｍ以上、４５．０質量ｐｐｍ以上、５０．０質量ｐｐｍ以上、５５．０質量ｐｐｍ以上、６０．０質量ｐｐｍ以上、６５．０質量ｐｐｍ以上、７０．０質量ｐｐｍ以上、７５．０質量ｐｐｍ以上、８０質量ｐｐｍ以上、又は８５質量ｐｐｍ以上としてもよく、また、好ましくは３２０質量ｐｐｍ以下、より好ましくは３００質量ｐｐｍ以下、より好ましくは２８０質量ｐｐｍ以下、より好ましくは２５０質量ｐｐｍ以下、更に好ましくは２２０質量ｐｐｍ以下、更に好ましくは２００質量ｐｐｍ以下、更に好ましくは１８０質量ｐｐｍ以下、より更に好ましくは１６０質量ｐｐｍ以下、特に好ましくは１５０質量ｐｐｍ以下であり、さらに、１４０質量ｐｐｍ以下、１３５質量ｐｐｍ以下、１３０質量ｐｐｍ以下、１２５質量ｐｐｍ以下、１２０質量ｐｐｍ以下、１１５質量ｐｐｍ以下、１１０質量ｐｐｍ以下、１０５質量ｐｐｍ以下、又は１００質量ｐｐｍ以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, the scuffing resistance and insulation properties are better maintained, and from the viewpoint of a lubricating oil composition having an excellent copper elution inhibitory effect and oxidation stability, the component (C) The content of nitrogen atoms derived is preferably 5.0 mass ppm or more, more preferably 7.0 mass ppm or more, more preferably 9.0 mass ppm, based on the total amount (100 mass%) of the lubricating oil composition ppm or more, more preferably 10.0 mass ppm or more, still more preferably 12.0 mass ppm or more, still more preferably 15.0 mass ppm or more, still more preferably 17.0 mass ppm or more, still more preferably 20.0 mass ppm or more Mass ppm or more, particularly preferably 22.0 mass ppm or more, further 25.0 mass ppm or more, 30.0 mass ppm or more, 35.0 mass ppm or more, 40.0 mass ppm or more, 45.0 mass ppm ppm or more, 50.0 mass ppm or more, 55.0 mass ppm or more, 60.0 mass ppm or more, 65.0 mass ppm or more, 70.0 mass ppm or more, 75.0 mass ppm or more, 80 mass ppm or more, Or it may be 85 mass ppm or more, preferably 320 mass ppm or less, more preferably 300 mass ppm or less, more preferably 280 mass ppm or less, more preferably 250 mass ppm or less, still more preferably 220 mass ppm or less, More preferably 200 mass ppm or less, more preferably 180 mass ppm or less, still more preferably 160 mass ppm or less, particularly preferably 150 mass ppm or less, and further 140 mass ppm or less, 135 mass ppm or less, 130 mass ppm Hereinafter, it may be 125 mass ppm or less, 120 mass ppm or less, 115 mass ppm or less, 110 mass ppm or less, 105 mass ppm or less, or 100 mass ppm or less.
本発明の一態様で用いる成分（Ｃ）は、ホウ素変性アルケニルコハク酸ビスイミド（Ｃ１）及びホウ素変性アルケニルコハク酸モノイミド（Ｃ２）から選ばれる１種以上が挙げられる。
本発明の一態様で用いる成分（Ｃ）は、優れた耐スカッフィング性を発現しつつ、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物とする観点から、ホウ素変性アルケニルコハク酸ビスイミド（Ｃ１）を含むことが好ましい。
上記観点から、成分（Ｃ１）の含有割合は、前記潤滑油組成物に含まれる成分（Ｃ）の全量（１００質量％）基準で、好ましくは２０～１００質量％、より好ましくは４０～１００質量％、より好ましくは５０～１００質量％、更に好ましくは６０～１００質量％、更に好ましくは７０～１００質量％、より更に好ましくは８０～１００質量％、特に好ましくは９０～１００質量％である。 Component (C) used in one aspect of the present invention includes one or more selected from boron-modified alkenylsuccinic acid bisimide (C1) and boron-modified alkenylsuccinic acid monoimide (C2).
The component (C) used in one aspect of the present invention is a boron-modified alkenylsuccinic acid bisimide ( C1) is preferably included.
From the above viewpoint, the content of component (C1) is preferably 20 to 100% by mass, more preferably 40 to 100% by mass, based on the total amount (100% by mass) of component (C) contained in the lubricating oil composition. %, more preferably 50 to 100% by mass, still more preferably 60 to 100% by mass, still more preferably 70 to 100% by mass, even more preferably 80 to 100% by mass, particularly preferably 90 to 100% by mass.
本発明の一態様で用いる成分（Ｃ）は、優れた耐スカッフィング性を発現しつつ、銅溶出抑制効果及び酸化安定性に優れた潤滑油組成物とする観点から、ホウ素変性アルケニルコハク酸ビスイミド（Ｃ１）を含むことが好ましい。
上記観点から、成分（Ｃ１）の含有割合は、前記潤滑油組成物に含まれる成分（Ｃ）の全量（１００質量％）基準で、好ましくは２０～１００質量％、より好ましくは４０～１００質量％、より好ましくは５０～１００質量％、更に好ましくは６０～１００質量％、更に好ましくは７０～１００質量％、より更に好ましくは８０～１００質量％、特に好ましくは９０～１００質量％である。 Component (C) used in one aspect of the present invention includes one or more selected from boron-modified alkenylsuccinic acid bisimide (C1) and boron-modified alkenylsuccinic acid monoimide (C2).
The component (C) used in one aspect of the present invention is a boron-modified alkenylsuccinic acid bisimide ( C1) is preferably included.
From the above viewpoint, the content of component (C1) is preferably 20 to 100% by mass, more preferably 40 to 100% by mass, based on the total amount (100% by mass) of component (C) contained in the lubricating oil composition. %, more preferably 50 to 100% by mass, still more preferably 60 to 100% by mass, still more preferably 70 to 100% by mass, even more preferably 80 to 100% by mass, particularly preferably 90 to 100% by mass.
成分（Ｃ１）としては、前記一般式（ｃ－１）で表される化合物のホウ素変性物が挙げられる。また、成分（Ｃ２）としては、前記一般式（ｃ－２）で表される化合物のホウ素変性物が挙げられる。
Examples of the component (C1) include boron-modified compounds of the compounds represented by the general formula (c-1). Further, the component (C2) includes a boron-modified compound of the compound represented by the general formula (c-2).
上記一般式（ｃ－１）及び（ｃ－２）中、Ｒａ１、Ｒａ２及びＲａ３は、それぞれ独立に、質量平均分子量（Ｍｗ）が５００～３０００（好ましくは９００～２５００）のアルケニル基である。
Ｒａ１、Ｒａ２及びＲａ３として選択し得る、前記アルケニル基としては、例えば、ポリブテニル基、ポリイソブテニル基、エチレン－プロピレン共重合体等が挙げられ、これらの中でも、ポリブテニル基又はポリイソブテニル基が好ましい。
Ｒｂ１、Ｒｂ２及びＲｂ３は、それぞれ独立に、炭素数２～５のアルキレン基である。
ｚ１は０～１０の整数であり、好ましくは１～４の整数、より好ましくは２又は３である。
ｚ２は１～１０の整数であり、好ましくは２～５の整数、より好ましくは３又は４である。 In general formulas (c-1) and (c-2) above, R a1 , R a2 and R a3 are each independently an alkenyl group having a weight average molecular weight (Mw) of 500 to 3000 (preferably 900 to 2500). is.
Examples of the alkenyl groups that can be selected as R a1 , R a2 and R a3 include polybutenyl groups, polyisobutenyl groups, ethylene-propylene copolymers, etc. Among these, polybutenyl groups and polyisobutenyl groups are preferred.
R b1 , R b2 and R b3 are each independently an alkylene group having 2 to 5 carbon atoms.
z1 is an integer of 0-10, preferably an integer of 1-4, more preferably 2 or 3.
z2 is an integer of 1-10, preferably an integer of 2-5, more preferably 3 or 4;
Ｒａ１、Ｒａ２及びＲａ３として選択し得る、前記アルケニル基としては、例えば、ポリブテニル基、ポリイソブテニル基、エチレン－プロピレン共重合体等が挙げられ、これらの中でも、ポリブテニル基又はポリイソブテニル基が好ましい。
Ｒｂ１、Ｒｂ２及びＲｂ３は、それぞれ独立に、炭素数２～５のアルキレン基である。
ｚ１は０～１０の整数であり、好ましくは１～４の整数、より好ましくは２又は３である。
ｚ２は１～１０の整数であり、好ましくは２～５の整数、より好ましくは３又は４である。 In general formulas (c-1) and (c-2) above, R a1 , R a2 and R a3 are each independently an alkenyl group having a weight average molecular weight (Mw) of 500 to 3000 (preferably 900 to 2500). is.
Examples of the alkenyl groups that can be selected as R a1 , R a2 and R a3 include polybutenyl groups, polyisobutenyl groups, ethylene-propylene copolymers, etc. Among these, polybutenyl groups and polyisobutenyl groups are preferred.
R b1 , R b2 and R b3 are each independently an alkylene group having 2 to 5 carbon atoms.
z1 is an integer of 0-10, preferably an integer of 1-4, more preferably 2 or 3.
z2 is an integer of 1-10, preferably an integer of 2-5, more preferably 3 or 4;
＜成分（Ｃ）以外の無灰分散剤＞
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、成分（Ｃ）以外の無灰分散剤を含有してもよい。
成分（Ｃ）以外の無灰分散剤としては、非ホウ素変性アルケニルコハク酸イミド、アルケニルコハク酸イミドのホウ素以外の変性物が挙げられる。
非ホウ素変性アルケニルコハク酸イミドとしては、例えば、前記一般式（ｃ－１）で表されるアルケニルコハク酸ビスイミド、及び、前記一般式（ｃ－２）で表されるアルケニルコハク酸モノイミド等が挙げられる。
アルケニルコハク酸イミドのホウ素以外の変性物としては、例えば、前記一般式（ｃ－１）又は（ｃ－２）で表される化合物と、アルコール、アルデヒド、ケトン、アルキルフェノール、環状カーボネート、エポキシ化合物、及び有機酸等から選ばれる１種以上とを反応させた、反応生成物が挙げられる。 <Ashless dispersant other than component (C)>
The lubricating oil composition of one aspect of the present invention may contain an ashless dispersant other than component (C) within a range that does not impair the effects of the present invention.
Examples of ashless dispersants other than component (C) include non-boron-modified alkenyl succinimides and modified alkenyl succinimides other than boron.
Examples of the non-boron-modified alkenylsuccinimide include alkenylsuccinic acid bisimide represented by the general formula (c-1) and alkenylsuccinic acid monoimide represented by the general formula (c-2). be done.
Modified products of alkenylsuccinimide other than boron include, for example, compounds represented by the general formula (c-1) or (c-2), alcohols, aldehydes, ketones, alkylphenols, cyclic carbonates, epoxy compounds, and a reaction product obtained by reacting with one or more selected from organic acids and the like.
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、成分（Ｃ）以外の無灰分散剤を含有してもよい。
成分（Ｃ）以外の無灰分散剤としては、非ホウ素変性アルケニルコハク酸イミド、アルケニルコハク酸イミドのホウ素以外の変性物が挙げられる。
非ホウ素変性アルケニルコハク酸イミドとしては、例えば、前記一般式（ｃ－１）で表されるアルケニルコハク酸ビスイミド、及び、前記一般式（ｃ－２）で表されるアルケニルコハク酸モノイミド等が挙げられる。
アルケニルコハク酸イミドのホウ素以外の変性物としては、例えば、前記一般式（ｃ－１）又は（ｃ－２）で表される化合物と、アルコール、アルデヒド、ケトン、アルキルフェノール、環状カーボネート、エポキシ化合物、及び有機酸等から選ばれる１種以上とを反応させた、反応生成物が挙げられる。 <Ashless dispersant other than component (C)>
The lubricating oil composition of one aspect of the present invention may contain an ashless dispersant other than component (C) within a range that does not impair the effects of the present invention.
Examples of ashless dispersants other than component (C) include non-boron-modified alkenyl succinimides and modified alkenyl succinimides other than boron.
Examples of the non-boron-modified alkenylsuccinimide include alkenylsuccinic acid bisimide represented by the general formula (c-1) and alkenylsuccinic acid monoimide represented by the general formula (c-2). be done.
Modified products of alkenylsuccinimide other than boron include, for example, compounds represented by the general formula (c-1) or (c-2), alcohols, aldehydes, ketones, alkylphenols, cyclic carbonates, epoxy compounds, and a reaction product obtained by reacting with one or more selected from organic acids and the like.
本発明の一態様の潤滑油組成物において、成分（Ｃ）以外の無灰分散剤の含有量は、当該潤滑油組成物の全量（１００質量％）基準で、１０．０質量％以下、８．０質量％以下、６．０質量％以下、５．０質量％以下、４．０質量％以下、３．０質量％以下、２．０質量％以下、１．０質量％以下、０．７質量％以下、０．５質量％以下、０．３質量％以下、０．２質量％以下、又は０．１質量％以下としてもよく、また、０質量％以上、０．００１質量％以上、又は０．０１質量％以上としてもよい。
8. In the lubricating oil composition of one aspect of the present invention, the content of the ashless dispersant other than the component (C) is 10.0% by mass or less based on the total amount (100% by mass) of the lubricating oil composition; 0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, 3.0% by mass or less, 2.0% by mass or less, 1.0% by mass or less, 0.7 % by mass or less, 0.5% by mass or less, 0.3% by mass or less, 0.2% by mass or less, or 0.1% by mass or less, or 0% by mass or more, 0.001% by mass or more, Alternatively, it may be 0.01% by mass or more.
＜成分（Ｄ）：リン系化合物＞
本発明の一態様の潤滑油組成物は、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、さらにリン酸エステル及び亜リン酸エステルから選ばれる１種以上のリン系化合物（Ｄ）を含有することが好ましい。 <Component (D): Phosphorus compound>
The lubricating oil composition of one aspect of the present invention further includes one or more phosphorus-based compounds selected from phosphates and phosphites (D ) is preferably contained.
本発明の一態様の潤滑油組成物は、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、さらにリン酸エステル及び亜リン酸エステルから選ばれる１種以上のリン系化合物（Ｄ）を含有することが好ましい。 <Component (D): Phosphorus compound>
The lubricating oil composition of one aspect of the present invention further includes one or more phosphorus-based compounds selected from phosphates and phosphites (D ) is preferably contained.
本発明の一態様で成分（Ｄ）として用いるリン酸エステルは、例えば、下記一般式（ｄ－１）で表される中性リン酸エステル、及び、下記一般式（ｄ－２）又は（ｄ－３）で表される酸性リン酸エステルが挙げられる。
また、本発明の一態様で成分（Ｄ）として用いる亜リン酸エステルは、例えば、下記一般式（ｄ－４）又は（ｄ－５）で表される酸性亜リン酸エステルが挙げられる。 The phosphate ester used as the component (D) in one aspect of the present invention includes, for example, a neutral phosphate ester represented by the following general formula (d-1), and the following general formula (d-2) or (d -3) and acidic phosphate esters.
Further, examples of the phosphite used as the component (D) in one aspect of the present invention include acidic phosphites represented by the following general formula (d-4) or (d-5).
また、本発明の一態様で成分（Ｄ）として用いる亜リン酸エステルは、例えば、下記一般式（ｄ－４）又は（ｄ－５）で表される酸性亜リン酸エステルが挙げられる。 The phosphate ester used as the component (D) in one aspect of the present invention includes, for example, a neutral phosphate ester represented by the following general formula (d-1), and the following general formula (d-2) or (d -3) and acidic phosphate esters.
Further, examples of the phosphite used as the component (D) in one aspect of the present invention include acidic phosphites represented by the following general formula (d-4) or (d-5).
上記式中、ＲＡは、それぞれ独立して、炭素数１～３０のアルキル基、炭素数２～２０のアルケニル基、炭素数１～６のアルキル基で置換されてもよい炭素数６～１８のアリール基、スルフィド結合を有する基等が挙げられる。なお、複数のＲＡは、同一であってもよく、互いに異なっていてもよい。
In the above formula, each R A is independently an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkyl group having 1 to 6 carbon atoms and optionally substituted with an alkyl group having 6 to 18 carbon atoms. aryl group, a group having a sulfide bond, and the like. In addition, a plurality of R A may be the same or different from each other.
ＲＡとして選択し得る、前記アルキル基としては、例えば、メチル基、エチル基、プロピル基（ｎ－プロピル基、イソプロピル基）、ブチル基（ｎ－ブチル基、ｓ－ブチル基、ｔ－ブチル基、イソブチル基）、ペンチル基、ヘキシル基、２－エチルヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ウンデシル基、ドデシル基、トリデシル、テトラデシル基、ヘキサデシル基、オクタデシル基等が挙げられる。
これらのアルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよい。
前記アルキル基の炭素数は、１～３０であるが、好ましくは３～２０、より好ましくは５～１６、更に好ましくは６～１４、より更に好ましくは８～１２である。 Examples of the alkyl group that can be selected as R A include methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group , isobutyl group), pentyl group, hexyl group, 2-ethylhexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl, tetradecyl group, hexadecyl group, octadecyl group and the like.
These alkyl groups may be straight-chain alkyl groups or branched-chain alkyl groups.
The number of carbon atoms in the alkyl group is 1 to 30, preferably 3 to 20, more preferably 5 to 16, even more preferably 6 to 14, still more preferably 8 to 12.
これらのアルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよい。
前記アルキル基の炭素数は、１～３０であるが、好ましくは３～２０、より好ましくは５～１６、更に好ましくは６～１４、より更に好ましくは８～１２である。 Examples of the alkyl group that can be selected as R A include methyl group, ethyl group, propyl group (n-propyl group, isopropyl group), butyl group (n-butyl group, s-butyl group, t-butyl group , isobutyl group), pentyl group, hexyl group, 2-ethylhexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl, tetradecyl group, hexadecyl group, octadecyl group and the like.
These alkyl groups may be straight-chain alkyl groups or branched-chain alkyl groups.
The number of carbon atoms in the alkyl group is 1 to 30, preferably 3 to 20, more preferably 5 to 16, even more preferably 6 to 14, still more preferably 8 to 12.
ＲＡとして選択し得る、前記アルケニル基としては、例えば、エテニル基、プロぺニル基、ブテニル基、ペンテニル基、ヘキセニル基、ヘプテニル基、オクテニル基、ノネニル基、デセニル基、ウンデセニル基、ドデセニル基、トリデセニル基、テトラデセニル基、ペンタデセニル基、ヘキサデセニル基、オクタデセニル基等が挙げられる。
これらのアルケニル基は、直鎖アルケニル基であってもよく、分岐鎖アルケニル基であってもよい。
前記アルケニル基の炭素数は、２～２０であるが、好ましくは３～１６、より好ましくは６～１２である。 Examples of the alkenyl group that can be selected as RA include ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, octadecenyl group and the like.
These alkenyl groups may be straight-chain alkenyl groups or branched-chain alkenyl groups.
The alkenyl group has 2 to 20 carbon atoms, preferably 3 to 16 carbon atoms, more preferably 6 to 12 carbon atoms.
これらのアルケニル基は、直鎖アルケニル基であってもよく、分岐鎖アルケニル基であってもよい。
前記アルケニル基の炭素数は、２～２０であるが、好ましくは３～１６、より好ましくは６～１２である。 Examples of the alkenyl group that can be selected as RA include ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, octadecenyl group and the like.
These alkenyl groups may be straight-chain alkenyl groups or branched-chain alkenyl groups.
The alkenyl group has 2 to 20 carbon atoms, preferably 3 to 16 carbon atoms, more preferably 6 to 12 carbon atoms.
ＲＡとして選択し得る、前記アリール基としては、例えば、フェニル基、ナフチル基、アントリル基、フェナントリル基、ビフェニル基、ターフェニル基、フェニルナフチル基等が挙げられ、フェニル基が好ましい。
なお、これらアリール基に置換し得る「炭素数１～６のアルキル基」としては、上述のアルキル基のうち、炭素数１～６のアルキル基が挙げられる。 Examples of the aryl group that can be selected as RA include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a biphenyl group, a terphenyl group, and a phenylnaphthyl group, with a phenyl group being preferred.
The "alkyl group having 1 to 6 carbon atoms" which can be substituted on these aryl groups includes alkyl groups having 1 to 6 carbon atoms among the alkyl groups described above.
なお、これらアリール基に置換し得る「炭素数１～６のアルキル基」としては、上述のアルキル基のうち、炭素数１～６のアルキル基が挙げられる。 Examples of the aryl group that can be selected as RA include a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a biphenyl group, a terphenyl group, and a phenylnaphthyl group, with a phenyl group being preferred.
The "alkyl group having 1 to 6 carbon atoms" which can be substituted on these aryl groups includes alkyl groups having 1 to 6 carbon atoms among the alkyl groups described above.
ＲＡとして選択し得る、スルフィド結合を有する基としては、下記一般式（ii）で表される基が好ましい。
上記式（ii）中、ＲＡ０１は水素原子又は炭素数１～２０の１価の有機基である。ＲＡ０２は２価の有機基である。ｘは１以上の整数であり、好ましくは１～１０の整数、より好ましくは１～５の整数、更に好ましくは１～３の整数、より更に好ましくは１又は２、特に好ましくは１である。＊は結合位置を示す。
As a group having a sulfide bond that can be selected as RA , a group represented by the following general formula (ii) is preferable.
In formula (ii) above, R A01 is a hydrogen atom or a monovalent organic group having 1 to 20 carbon atoms. RA02 is a divalent organic group. x is an integer of 1 or more, preferably an integer of 1 to 10, more preferably an integer of 1 to 5, still more preferably an integer of 1 to 3, even more preferably 1 or 2, particularly preferably 1. * indicates the binding position.
ＲＡ０１として選択し得る、１価の有機基としては、例えば、アルキル基、アルケニル基、アリール基等が挙げられるが、炭素数１～２０のアルキル基、もしくは、炭素数１～２０（好ましくは２～１８、より好ましくは４～１６、更に好ましくは６～１２、より更に好ましくは８～１０）のアルキル基の少なくとも１つの－ＣＨ２－構造が、－Ｏ－、－Ｓ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＳＯ－、－ＯＣＳ－、－ＣＨ＝ＣＨ－又は－Ｃ≡Ｃ－に置換された基であることが好ましく、アルキル基がより好ましい。
ＲＡ０１として選択し得る、アルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよいが、直鎖アルキル基であることが好ましい。
また、当該アルキル基の炭素数は、１～２０であるが、好ましくは２～１８、より好ましくは４～１６、更に好ましくは６～１２、より更に好ましくは８～１０である。 Examples of monovalent organic groups that can be selected as R A01 include alkyl groups, alkenyl groups, aryl groups and the like. 2 to 18, more preferably 4 to 16, still more preferably 6 to 12, still more preferably 8 to 10), wherein at least one -CH 2 - structure of the alkyl group is -O-, -S-, -COO A group substituted with -, -OCO-, -CSO-, -OCS-, -CH=CH- or -C≡C- is preferred, and an alkyl group is more preferred.
The alkyl group that can be selected as RA01 may be a straight-chain alkyl group or a branched-chain alkyl group, but is preferably a straight-chain alkyl group.
The alkyl group has 1 to 20 carbon atoms, preferably 2 to 18 carbon atoms, more preferably 4 to 16 carbon atoms, still more preferably 6 to 12 carbon atoms, and even more preferably 8 to 10 carbon atoms.
ＲＡ０１として選択し得る、アルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよいが、直鎖アルキル基であることが好ましい。
また、当該アルキル基の炭素数は、１～２０であるが、好ましくは２～１８、より好ましくは４～１６、更に好ましくは６～１２、より更に好ましくは８～１０である。 Examples of monovalent organic groups that can be selected as R A01 include alkyl groups, alkenyl groups, aryl groups and the like. 2 to 18, more preferably 4 to 16, still more preferably 6 to 12, still more preferably 8 to 10), wherein at least one -CH 2 - structure of the alkyl group is -O-, -S-, -COO A group substituted with -, -OCO-, -CSO-, -OCS-, -CH=CH- or -C≡C- is preferred, and an alkyl group is more preferred.
The alkyl group that can be selected as RA01 may be a straight-chain alkyl group or a branched-chain alkyl group, but is preferably a straight-chain alkyl group.
The alkyl group has 1 to 20 carbon atoms, preferably 2 to 18 carbon atoms, more preferably 4 to 16 carbon atoms, still more preferably 6 to 12 carbon atoms, and even more preferably 8 to 10 carbon atoms.
ＲＡ０２として選択し得る、２価の有機基としては、例えば、炭素数１～２０のアルキレン基、シクロアルキレン基、炭素数１～２０のアルケニレン基、シクロアルケニレン基、アリーレン基等が挙げられるが、炭素数１～２０のアルキレン基、もしくは、炭素数１～２０（好ましくは２～１２、より好ましくは２～８、更に好ましくは２～４）のアルキレン基の少なくとも１つの－ＣＨ２－構造が、－Ｏ－、－Ｓ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＳＯ－、－ＯＣＳ－、－ＣＨ＝ＣＨ－又は－Ｃ≡Ｃ－に置換された基であることが好ましく、炭素数２～２０のアルキレン基がより好ましい。
ＲＡ０２として選択し得る、アルキレン基は、直鎖アルキレン基であってもよく、分岐鎖アルキレン基であってもよいが、直鎖アルキレン基であることが好ましい。
また、当該アルキレン基の炭素数は、１～２０であるが、好ましくは１～１２、より好ましくは１～８、更に好ましくは１～４、より更に好ましくは１、２又は４、特に好ましくは２である。 Examples of the divalent organic group that can be selected as R A02 include an alkylene group having 1 to 20 carbon atoms, a cycloalkylene group, an alkenylene group having 1 to 20 carbon atoms, a cycloalkenylene group, an arylene group, and the like. , an alkylene group having 1 to 20 carbon atoms, or at least one —CH 2 — structure of an alkylene group having 1 to 20 carbon atoms (preferably 2 to 12, more preferably 2 to 8, and even more preferably 2 to 4) Is preferably a group substituted with -O-, -S-, -COO-, -OCO-, -CSO-, -OCS-, -CH=CH- or -C≡C-, and the number of carbon atoms 2 to 20 alkylene groups are more preferred.
The alkylene group that can be selected as R A02 may be a linear alkylene group or a branched alkylene group, but is preferably a linear alkylene group.
The number of carbon atoms in the alkylene group is 1 to 20, preferably 1 to 12, more preferably 1 to 8, still more preferably 1 to 4, even more preferably 1, 2 or 4, particularly preferably 2.
ＲＡ０２として選択し得る、アルキレン基は、直鎖アルキレン基であってもよく、分岐鎖アルキレン基であってもよいが、直鎖アルキレン基であることが好ましい。
また、当該アルキレン基の炭素数は、１～２０であるが、好ましくは１～１２、より好ましくは１～８、更に好ましくは１～４、より更に好ましくは１、２又は４、特に好ましくは２である。 Examples of the divalent organic group that can be selected as R A02 include an alkylene group having 1 to 20 carbon atoms, a cycloalkylene group, an alkenylene group having 1 to 20 carbon atoms, a cycloalkenylene group, an arylene group, and the like. , an alkylene group having 1 to 20 carbon atoms, or at least one —CH 2 — structure of an alkylene group having 1 to 20 carbon atoms (preferably 2 to 12, more preferably 2 to 8, and even more preferably 2 to 4) Is preferably a group substituted with -O-, -S-, -COO-, -OCO-, -CSO-, -OCS-, -CH=CH- or -C≡C-, and the number of carbon atoms 2 to 20 alkylene groups are more preferred.
The alkylene group that can be selected as R A02 may be a linear alkylene group or a branched alkylene group, but is preferably a linear alkylene group.
The number of carbon atoms in the alkylene group is 1 to 20, preferably 1 to 12, more preferably 1 to 8, still more preferably 1 to 4, even more preferably 1, 2 or 4, particularly preferably 2.
本発明の一態様の潤滑油組成物において、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、成分（Ｄ）が、硫黄原子含有リン酸エステル及び硫黄原子含有亜リン酸エステルから選ばれる１種以上の硫黄リン系化合物（Ｄ１）を含むことが好ましい。
In the lubricating oil composition of one aspect of the present invention, from the viewpoint of a lubricating oil composition with further improved wear resistance, the component (D) is a sulfur atom-containing phosphate and a sulfur atom-containing phosphite. It is preferable to contain one or more selected sulfur-phosphorus compounds (D1).
本発明の一態様の潤滑油組成物において、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、成分（Ｄ１）の含有割合は、当該潤滑油組成物に含まれる成分（Ｄ）の全量（１００質量％）基準で、好ましくは６０～１００質量％、より好ましくは７０～１００質量％、より好ましくは８０～１００質量％、更に好ましくは９０～１００質量％、より更に好ましくは９５～１００質量％、特に好ましくは９８～１００質量％である。
In the lubricating oil composition of one aspect of the present invention, from the viewpoint of obtaining a lubricating oil composition with further improved wear resistance, the content of the component (D1) is the component (D) contained in the lubricating oil composition Based on the total amount (100% by mass), preferably 60 to 100% by mass, more preferably 70 to 100% by mass, more preferably 80 to 100% by mass, still more preferably 90 to 100% by mass, still more preferably 95 to 100% by mass, particularly preferably 98 to 100% by mass.
硫黄原子含有リン酸エステル及び硫黄原子含有亜リン酸エステルとしては、前記式（ii）で表される基を有する硫黄原子含有リン酸エステル及び硫黄原子含有亜リン酸エステルが挙げられる。
さらに耐摩耗性を向上させた潤滑油組成物とする観点から、本発明の一態様で用いる成分（Ｄ１）は、前記式（ii）で表される基を有する硫黄原子含有亜リン酸エステルが好ましく、下記一般式（ｄ－１１）で表される化合物（Ｄ１１）及び下記一般式（ｄ－１２）で表される化合物（Ｄ１２）が選ばれる１種以上がより好ましい。 Examples of sulfur atom-containing phosphates and sulfur atom-containing phosphites include sulfur atom-containing phosphates and sulfur atom-containing phosphites having a group represented by the formula (ii).
Further, from the viewpoint of providing a lubricating oil composition with improved wear resistance, the component (D1) used in one embodiment of the present invention is a sulfur atom-containing phosphite having a group represented by the formula (ii). More preferably, one or more selected from a compound (D11) represented by the following general formula (d-11) and a compound (D12) represented by the following general formula (d-12) is more preferred.
さらに耐摩耗性を向上させた潤滑油組成物とする観点から、本発明の一態様で用いる成分（Ｄ１）は、前記式（ii）で表される基を有する硫黄原子含有亜リン酸エステルが好ましく、下記一般式（ｄ－１１）で表される化合物（Ｄ１１）及び下記一般式（ｄ－１２）で表される化合物（Ｄ１２）が選ばれる１種以上がより好ましい。 Examples of sulfur atom-containing phosphates and sulfur atom-containing phosphites include sulfur atom-containing phosphates and sulfur atom-containing phosphites having a group represented by the formula (ii).
Further, from the viewpoint of providing a lubricating oil composition with improved wear resistance, the component (D1) used in one embodiment of the present invention is a sulfur atom-containing phosphite having a group represented by the formula (ii). More preferably, one or more selected from a compound (D11) represented by the following general formula (d-11) and a compound (D12) represented by the following general formula (d-12) is more preferred.
前記式（ｄ－１１）、（ｄ－１２）中、ＲＡ１１、ＲＡ２１及びＲＡ２２は、それぞれ独立に、水素原子又は炭素数１～２０のアルキル基である。
当該アルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよいが、直鎖アルキル基であることが好ましい。
また、当該アルキル基の炭素数は１～２０であるが、好ましくは２～１８、より好ましくは４～１６、更に好ましくは６～１２、より更に好ましくは８～１０である。
また、ａ１、ａ２及びａ３は、それぞれ独立に、１～２０の整数であるが、好ましくは１～１２の整数、より好ましくは１～８の整数、更に好ましくは１～４の整数、より更に好ましくは１、２又は４、特に好ましくは２である。 In formulas (d-11) and (d-12), R A11 , R A21 and R A22 are each independently a hydrogen atom or an alkyl group having 1 to 20 carbon atoms.
The alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group, but is preferably a straight-chain alkyl group.
The alkyl group has 1 to 20 carbon atoms, preferably 2 to 18 carbon atoms, more preferably 4 to 16 carbon atoms, still more preferably 6 to 12 carbon atoms, and even more preferably 8 to 10 carbon atoms.
Further, a1, a2 and a3 are each independently an integer of 1 to 20, preferably an integer of 1 to 12, more preferably an integer of 1 to 8, still more preferably an integer of 1 to 4, and more Preferably 1, 2 or 4, particularly preferably 2.
当該アルキル基は、直鎖アルキル基であってもよく、分岐鎖アルキル基であってもよいが、直鎖アルキル基であることが好ましい。
また、当該アルキル基の炭素数は１～２０であるが、好ましくは２～１８、より好ましくは４～１６、更に好ましくは６～１２、より更に好ましくは８～１０である。
また、ａ１、ａ２及びａ３は、それぞれ独立に、１～２０の整数であるが、好ましくは１～１２の整数、より好ましくは１～８の整数、更に好ましくは１～４の整数、より更に好ましくは１、２又は４、特に好ましくは２である。 In formulas (d-11) and (d-12), R A11 , R A21 and R A22 are each independently a hydrogen atom or an alkyl group having 1 to 20 carbon atoms.
The alkyl group may be a straight-chain alkyl group or a branched-chain alkyl group, but is preferably a straight-chain alkyl group.
The alkyl group has 1 to 20 carbon atoms, preferably 2 to 18 carbon atoms, more preferably 4 to 16 carbon atoms, still more preferably 6 to 12 carbon atoms, and even more preferably 8 to 10 carbon atoms.
Further, a1, a2 and a3 are each independently an integer of 1 to 20, preferably an integer of 1 to 12, more preferably an integer of 1 to 8, still more preferably an integer of 1 to 4, and more Preferably 1, 2 or 4, particularly preferably 2.
本発明の一態様の潤滑油組成物において、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、成分（Ｄ）が、前記一般式（ｄ－１１）で表される化合物（Ｄ１１）及び前記一般式（ｄ－１２）で表される化合物（Ｄ１２）を共に含むことが更に好ましい。
本発明の一態様において、化合物（Ｄ１１）と、化合物（Ｄ１２）との含有量比〔（Ｄ１１）／（Ｄ１２）〕は、質量比で、好ましくは１／２０～２０／１、より好ましくは１／１６～１０／１、より好ましくは１／１４～５／１、更に好ましくは１／１２～２／１、より更に好ましくは１／１１～１／１、特に好ましくは１／１０～１／２である。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of providing a lubricating oil composition with further improved wear resistance, the component (D) is a compound (D11) represented by the general formula (d-11) ) and the compound (D12) represented by the general formula (d-12).
In one aspect of the present invention, the content ratio of compound (D11) and compound (D12) [(D11)/(D12)] is preferably 1/20 to 20/1, more preferably 1/16 to 10/1, more preferably 1/14 to 5/1, more preferably 1/12 to 2/1, even more preferably 1/11 to 1/1, particularly preferably 1/10 to 1 /2.
本発明の一態様において、化合物（Ｄ１１）と、化合物（Ｄ１２）との含有量比〔（Ｄ１１）／（Ｄ１２）〕は、質量比で、好ましくは１／２０～２０／１、より好ましくは１／１６～１０／１、より好ましくは１／１４～５／１、更に好ましくは１／１２～２／１、より更に好ましくは１／１１～１／１、特に好ましくは１／１０～１／２である。 In the lubricating oil composition of one aspect of the present invention, from the viewpoint of providing a lubricating oil composition with further improved wear resistance, the component (D) is a compound (D11) represented by the general formula (d-11) ) and the compound (D12) represented by the general formula (d-12).
In one aspect of the present invention, the content ratio of compound (D11) and compound (D12) [(D11)/(D12)] is preferably 1/20 to 20/1, more preferably 1/16 to 10/1, more preferably 1/14 to 5/1, more preferably 1/12 to 2/1, even more preferably 1/11 to 1/1, particularly preferably 1/10 to 1 /2.
なお、本発明の一態様で成分（Ｄ）として用いる酸性リン酸エステル及び酸性亜リン酸エステルは、アミン塩の形態であってもよい。
アミン塩を形成するアミンとしては、下記一般式（ｄ－ｉ）で表される化合物であることが好ましい。当該アミンは、単独で用いてもよく、２種以上を併用してもよい。
The acidic phosphate and acidic phosphite used as the component (D) in one aspect of the present invention may be in the form of an amine salt.
The amine that forms the amine salt is preferably a compound represented by the following general formula (di). The said amine may be used individually and may use 2 or more types together.
アミン塩を形成するアミンとしては、下記一般式（ｄ－ｉ）で表される化合物であることが好ましい。当該アミンは、単独で用いてもよく、２種以上を併用してもよい。
The amine that forms the amine salt is preferably a compound represented by the following general formula (di). The said amine may be used individually and may use 2 or more types together.
上記一般式（ｄ－ｉ）中、ｒは、１～３の整数であり、１であることが好ましい。
Ｒｘは、それぞれ独立に、炭素数６～１８のアルキル基、炭素数６～１８のアルケニル基、炭素数６～１８のアリール基、又は炭素数６～１８のヒドロキシアルキル基である。
なお、Ｒｘが複数存在する場合、複数のＲｘは、同一であってもよく、互いに異なっていてもよい。 In general formula (di) above, r is an integer of 1 to 3, preferably 1.
Each R x is independently an alkyl group having 6 to 18 carbon atoms, an alkenyl group having 6 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, or a hydroxyalkyl group having 6 to 18 carbon atoms.
In addition, when a plurality of R x are present, the plurality of R x may be the same or different from each other.
Ｒｘは、それぞれ独立に、炭素数６～１８のアルキル基、炭素数６～１８のアルケニル基、炭素数６～１８のアリール基、又は炭素数６～１８のヒドロキシアルキル基である。
なお、Ｒｘが複数存在する場合、複数のＲｘは、同一であってもよく、互いに異なっていてもよい。 In general formula (di) above, r is an integer of 1 to 3, preferably 1.
Each R x is independently an alkyl group having 6 to 18 carbon atoms, an alkenyl group having 6 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, or a hydroxyalkyl group having 6 to 18 carbon atoms.
In addition, when a plurality of R x are present, the plurality of R x may be the same or different from each other.
Ｒｘとして選択し得る、炭素数６～１８のアルキル基、炭素数６～１８のアルケニル基、及び炭素数６～１８のアリール基としては、上述のＲ１１～Ｒ１３及びＲ２１～Ｒ２３として選択し得るアルキル基、アルケニル基、及びアリール基として例示した基のうち、上記範囲の炭素数である基が挙げられる。
また、炭素数６～１８のヒドロキシアルキル基としては、炭素数６～１８のアルキル基が有する水素原子がヒドロキシ基に置換された基が挙げられ、具体的には、ヒドロキシヘキシル基、ヒドロキシオクチル基、ヒドロキシドデシル基、ヒドロキシトリデシル基等が挙げられる。 The alkyl group having 6 to 18 carbon atoms, the alkenyl group having 6 to 18 carbon atoms and the aryl group having 6 to 18 carbon atoms which can be selected as R x include the above R 11 to R 13 and R 21 to R 23 Among the groups exemplified as alkyl groups, alkenyl groups, and aryl groups that can be selected as , groups having the number of carbon atoms within the above range can be mentioned.
Examples of the hydroxyalkyl group having 6 to 18 carbon atoms include a group in which the hydrogen atom of an alkyl group having 6 to 18 carbon atoms is substituted with a hydroxy group. Specifically, hydroxyhexyl group and hydroxyoctyl group. , hydroxydodecyl group, hydroxytridecyl group and the like.
また、炭素数６～１８のヒドロキシアルキル基としては、炭素数６～１８のアルキル基が有する水素原子がヒドロキシ基に置換された基が挙げられ、具体的には、ヒドロキシヘキシル基、ヒドロキシオクチル基、ヒドロキシドデシル基、ヒドロキシトリデシル基等が挙げられる。 The alkyl group having 6 to 18 carbon atoms, the alkenyl group having 6 to 18 carbon atoms and the aryl group having 6 to 18 carbon atoms which can be selected as R x include the above R 11 to R 13 and R 21 to R 23 Among the groups exemplified as alkyl groups, alkenyl groups, and aryl groups that can be selected as , groups having the number of carbon atoms within the above range can be mentioned.
Examples of the hydroxyalkyl group having 6 to 18 carbon atoms include a group in which the hydrogen atom of an alkyl group having 6 to 18 carbon atoms is substituted with a hydroxy group. Specifically, hydroxyhexyl group and hydroxyoctyl group. , hydroxydodecyl group, hydroxytridecyl group and the like.
本発明の一態様の潤滑油組成物において、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、成分（Ｄ）の含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは０．０１質量％以上、より好ましくは０．０５質量％以上、更に好ましくは０．０７質量％以上、より更に好ましくは０．１０質量％以上、特に好ましくは０．１５質量％以上であり、さらに、０．１７質量％以上、０．２０質量％以上、０．２３質量％以上、０．２５質量％以上、０．２７質量％以上、又は０．３０質量％以上としてもよく、また、好ましくは３．０質量％以下、より好ましくは２．５質量％以下、更に好ましくは２．０質量％以下、より更に好ましくは１．５質量％以下、特に好ましくは１．２質量％以下であり、さらに、１．０質量％以下、０．９５質量％以下、０．９０質量％以下、０．８５質量％以下、０．８０質量％以下、０．７５質量％以下、０．７０質量％以下、０．６５質量％以下、０．６０質量％以下、０．５５質量％以下、又は０．５０質量％以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, from the viewpoint of obtaining a lubricating oil composition with further improved wear resistance, the content of the component (D) is the total amount (100% by mass) of the lubricating oil composition Based on, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, still more preferably 0.07% by mass or more, even more preferably 0.10% by mass or more, particularly preferably 0.15% by mass % or more, and further 0.17% by mass or more, 0.20% by mass or more, 0.23% by mass or more, 0.25% by mass or more, 0.27% by mass or more, or 0.30% by mass or more Also preferably 3.0% by mass or less, more preferably 2.5% by mass or less, still more preferably 2.0% by mass or less, even more preferably 1.5% by mass or less, and particularly preferably 1.5% by mass or less. 2% by mass or less, 1.0% by mass or less, 0.95% by mass or less, 0.90% by mass or less, 0.85% by mass or less, 0.80% by mass or less, 0.75% by mass or less , 0.70% by mass or less, 0.65% by mass or less, 0.60% by mass or less, 0.55% by mass or less, or 0.50% by mass or less.
本発明の一態様の潤滑油組成物において、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、成分（Ｄ）のリン原子換算での含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは３０質量ｐｐｍ以上、より好ましくは５０質量ｐｐｍ以上、より好ましくは７０質量ｐｐｍ以上、より好ましくは１００質量ｐｐｍ以上、更に好ましくは１２０質量ｐｐｍ以上、更に好ましくは１５０質量ｐｐｍ以上、更に好ましくは１８０質量ｐｐｍ以上、より更に好ましくは２００質量ｐｐｍ以上、より更に好ましくは２２０質量ｐｐｍ以上、より更に好ましくは２５０質量ｐｐｍ以上、特に好ましくは２７０質量ｐｐｍ以上であり、また、好ましくは８００質量ｐｐｍ以下、より好ましくは７００質量ｐｐｍ以下、更に好ましくは６００質量ｐｐｍ以下、より更に好ましくは５００質量ｐｐｍ以下、特に好ましくは４５０質量ｐｐｍ以下であり、さらに、４２０質量ｐｐｍ以下、４００質量ｐｐｍ以下、３８０質量ｐｐｍ以下、３７０質量ｐｐｍ以下、３６０質量ｐｐｍ以下、又は３５０質量ｐｐｍ以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, from the viewpoint of providing a lubricating oil composition with further improved wear resistance, the content of component (D) in terms of phosphorus atoms is the total amount of the lubricating oil composition (100% by mass), preferably 30 mass ppm or more, more preferably 50 mass ppm or more, more preferably 70 mass ppm or more, more preferably 100 mass ppm or more, still more preferably 120 mass ppm or more, still more preferably 150 mass ppm or more, more preferably 180 mass ppm or more, still more preferably 200 mass ppm or more, still more preferably 220 mass ppm or more, still more preferably 250 mass ppm or more, particularly preferably 270 mass ppm or more, Further, it is preferably 800 mass ppm or less, more preferably 700 mass ppm or less, still more preferably 600 mass ppm or less, still more preferably 500 mass ppm or less, particularly preferably 450 mass ppm or less, and further preferably 420 mass ppm or less. , 400 mass ppm or less, 380 mass ppm or less, 370 mass ppm or less, 360 mass ppm or less, or 350 mass ppm or less.
本発明の一態様の潤滑油組成物において、さらに耐摩耗性を向上させた潤滑油組成物とする観点から、成分（Ｄ）の硫黄原子換算での含有量は、前記潤滑油組成物の全量（１００質量％）基準で、好ましくは５０質量ｐｐｍ以上、より好ましくは７０質量ｐｐｍ以上、より好ましくは１００質量ｐｐｍ以上、より好ましくは１２０質量ｐｐｍ以上、更に好ましくは１５０質量ｐｐｍ以上、更に好ましくは１８０質量ｐｐｍ以上、更に好ましくは２００質量ｐｐｍ以上、より更に好ましくは２２０質量ｐｐｍ以上、より更に好ましくは２５０質量ｐｐｍ以上、より更に好ましくは２７０質量ｐｐｍ以上、特に好ましくは３００質量ｐｐｍ以上であり、また、好ましくは８００質量ｐｐｍ以下、より好ましくは７００質量ｐｐｍ以下、更に好ましくは６００質量ｐｐｍ以下、より更に好ましくは５００質量ｐｐｍ以下、特に好ましくは４５０質量ｐｐｍ以下であり、さらに、４２０質量ｐｐｍ以下、４００質量ｐｐｍ以下、３８０質量ｐｐｍ以下、３７０質量ｐｐｍ以下、３６０質量ｐｐｍ以下、又は３５０質量ｐｐｍ以下としてもよい。
In the lubricating oil composition of one aspect of the present invention, from the viewpoint of obtaining a lubricating oil composition with further improved wear resistance, the content of component (D) in terms of sulfur atoms is the total amount of the lubricating oil composition (100% by mass), preferably 50 mass ppm or more, more preferably 70 mass ppm or more, more preferably 100 mass ppm or more, more preferably 120 mass ppm or more, still more preferably 150 mass ppm or more, still more preferably 180 mass ppm or more, more preferably 200 mass ppm or more, still more preferably 220 mass ppm or more, still more preferably 250 mass ppm or more, still more preferably 270 mass ppm or more, particularly preferably 300 mass ppm or more, Further, it is preferably 800 mass ppm or less, more preferably 700 mass ppm or less, still more preferably 600 mass ppm or less, still more preferably 500 mass ppm or less, particularly preferably 450 mass ppm or less, and further preferably 420 mass ppm or less. , 400 mass ppm or less, 380 mass ppm or less, 370 mass ppm or less, 360 mass ppm or less, or 350 mass ppm or less.
本発明の一態様の潤滑油組成物において、硫黄原子非含有の酸性リン酸エステルのリン原子換算での含有量は、当該潤滑油組成物の全量（１００質量％）基準で、１００質量ｐｐｍ未満、５０質量ｐｐｍ未満、１０質量ｐｐｍ未満、８質量ｐｐｍ未満、５質量ｐｐｍ未満、３質量ｐｐｍ未満、又は１質量ｐｐｍ未満としてもよい。
In the lubricating oil composition of one aspect of the present invention, the content of the sulfur atom-free acidic phosphate in terms of phosphorus atoms is less than 100 ppm by mass based on the total amount (100% by mass) of the lubricating oil composition. , less than 50 mass ppm, less than 10 mass ppm, less than 8 mass ppm, less than 5 mass ppm, less than 3 mass ppm, or less than 1 mass ppm.
また、本発明の一態様の潤滑油組成物において、硫黄原子非含有の中性リン酸エステルのリン原子換算での含有量は、当該潤滑油組成物の全量（１００質量％）基準で、５０質量ｐｐｍ未満、１０質量ｐｐｍ未満、８質量ｐｐｍ未満、５質量ｐｐｍ未満、３質量ｐｐｍ未満、又は１質量ｐｐｍ未満としてもよい。
In addition, in the lubricating oil composition of one aspect of the present invention, the content of the sulfur atom-free neutral phosphate in terms of phosphorus atoms is 50 based on the total amount (100% by mass) of the lubricating oil composition. It may be less than ppm by weight, less than 10 ppm by weight, less than 8 ppm by weight, less than 5 ppm by weight, less than 3 ppm by weight, or less than 1 ppm by weight.
＜成分（Ｂ）～（Ｄ）以外の各種添加剤＞
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、必要に応じて、成分（Ｂ）～（Ｄ）以外の各種添加剤を含有してもよい。
このような各種添加剤としては、例えば、流動点降下剤、酸化防止剤、金属系清浄剤、金属不活性化剤、摩擦調整剤、防錆剤、消泡剤等が挙げられる。
これらの潤滑油用添加剤は、それぞれ、単独で用いてもよく、２種以上を併用してもよい。 <Various additives other than components (B) to (D)>
The lubricating oil composition of one aspect of the present invention may optionally contain various additives other than components (B) to (D) within a range that does not impair the effects of the present invention.
Examples of such various additives include pour point depressants, antioxidants, metallic detergents, metal deactivators, friction modifiers, rust inhibitors, antifoaming agents and the like.
Each of these lubricating oil additives may be used alone, or two or more of them may be used in combination.
本発明の一態様の潤滑油組成物は、本発明の効果を損なわない範囲で、必要に応じて、成分（Ｂ）～（Ｄ）以外の各種添加剤を含有してもよい。
このような各種添加剤としては、例えば、流動点降下剤、酸化防止剤、金属系清浄剤、金属不活性化剤、摩擦調整剤、防錆剤、消泡剤等が挙げられる。
これらの潤滑油用添加剤は、それぞれ、単独で用いてもよく、２種以上を併用してもよい。 <Various additives other than components (B) to (D)>
The lubricating oil composition of one aspect of the present invention may optionally contain various additives other than components (B) to (D) within a range that does not impair the effects of the present invention.
Examples of such various additives include pour point depressants, antioxidants, metallic detergents, metal deactivators, friction modifiers, rust inhibitors, antifoaming agents and the like.
Each of these lubricating oil additives may be used alone, or two or more of them may be used in combination.
これらの潤滑油用添加剤のそれぞれの含有量は、本発明の効果を損なわない範囲内で、適宜調整することができるが、潤滑油組成物の全量（１００質量％）基準で、それぞれの添加剤ごとに独立して、通常０．００１～１５質量％、好ましくは０．００５～１０質量％、より好ましくは０．０１～５質量％である。
The content of each of these lubricating oil additives can be adjusted as appropriate within a range that does not impair the effects of the present invention. It is usually 0.001 to 15% by mass, preferably 0.005 to 10% by mass, more preferably 0.01 to 5% by mass, independently for each agent.
［流動点降下剤］
本発明の一態様の潤滑油組成物は、さらに流動点降下剤を含有してもよい。流動点降下剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる流動点降下剤としては、例えば、エチレン－酢酸ビニル共重合体、塩素化パラフィンとナフタレンとの縮合物、塩素化パラフィンとフェノールとの縮合物、ポリメタクリレート、ポリアルキルスチレン等が挙げられる。 [Pour point depressant]
The lubricating oil composition of one aspect of the present invention may further contain a pour point depressant. The pour point depressants may be used alone or in combination of two or more.
Pour point depressants used in one embodiment of the present invention include, for example, ethylene-vinyl acetate copolymers, condensates of chlorinated paraffin and naphthalene, condensates of chlorinated paraffin and phenol, polymethacrylates, and polyalkylstyrenes. etc.
本発明の一態様の潤滑油組成物は、さらに流動点降下剤を含有してもよい。流動点降下剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる流動点降下剤としては、例えば、エチレン－酢酸ビニル共重合体、塩素化パラフィンとナフタレンとの縮合物、塩素化パラフィンとフェノールとの縮合物、ポリメタクリレート、ポリアルキルスチレン等が挙げられる。 [Pour point depressant]
The lubricating oil composition of one aspect of the present invention may further contain a pour point depressant. The pour point depressants may be used alone or in combination of two or more.
Pour point depressants used in one embodiment of the present invention include, for example, ethylene-vinyl acetate copolymers, condensates of chlorinated paraffin and naphthalene, condensates of chlorinated paraffin and phenol, polymethacrylates, and polyalkylstyrenes. etc.
［酸化防止剤］
本発明の一態様の潤滑油組成物は、さらに酸化防止剤を含有してもよい。酸化防止剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる酸化防止剤としては、例えば、アルキル化ジフェニルアミン、フェニルナフチルアミン、アルキル化フェニルナフチルアミン等のアミン系酸化防止剤；２、６－ジ－ｔ－ブチルフェノール、４，４’－メチレンビス（２，６ージーｔーブチルフェノール）、イソオクチル－３－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオネート、ｎ－オクタデシル－３－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオネート等のフェノール系酸化防止剤；等が挙げられる。
本発明の一態様の潤滑油組成物において、酸化防止剤は、アミン系酸化防止剤とフェノール系酸化防止剤とを併用することが好ましい。 [Antioxidant]
The lubricating oil composition of one aspect of the present invention may further contain an antioxidant. An antioxidant may be used independently and may use 2 or more types together.
Antioxidants used in one aspect of the present invention include, for example, alkylated diphenylamine, phenylnaphthylamine, alkylated phenylnaphthylamine, and other amine-based antioxidants; (2,6-di-t-butylphenol), isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, n-octadecyl-3-(3,5-di-t-butyl-4 - phenolic antioxidants such as hydroxyphenyl)propionate;
In the lubricating oil composition of one aspect of the present invention, it is preferable that the antioxidant is a combination of an amine-based antioxidant and a phenol-based antioxidant.
本発明の一態様の潤滑油組成物は、さらに酸化防止剤を含有してもよい。酸化防止剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる酸化防止剤としては、例えば、アルキル化ジフェニルアミン、フェニルナフチルアミン、アルキル化フェニルナフチルアミン等のアミン系酸化防止剤；２、６－ジ－ｔ－ブチルフェノール、４，４’－メチレンビス（２，６ージーｔーブチルフェノール）、イソオクチル－３－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオネート、ｎ－オクタデシル－３－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオネート等のフェノール系酸化防止剤；等が挙げられる。
本発明の一態様の潤滑油組成物において、酸化防止剤は、アミン系酸化防止剤とフェノール系酸化防止剤とを併用することが好ましい。 [Antioxidant]
The lubricating oil composition of one aspect of the present invention may further contain an antioxidant. An antioxidant may be used independently and may use 2 or more types together.
Antioxidants used in one aspect of the present invention include, for example, alkylated diphenylamine, phenylnaphthylamine, alkylated phenylnaphthylamine, and other amine-based antioxidants; (2,6-di-t-butylphenol), isooctyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate, n-octadecyl-3-(3,5-di-t-butyl-4 - phenolic antioxidants such as hydroxyphenyl)propionate;
In the lubricating oil composition of one aspect of the present invention, it is preferable that the antioxidant is a combination of an amine-based antioxidant and a phenol-based antioxidant.
［金属系清浄剤］
本発明の一態様の潤滑油組成物は、さらに金属系清浄剤を含有してもよい。金属系清浄剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる金属系清浄剤としては、金属スルホネート、金属サリシレート、及び金属フェネート等の金属塩が挙げられる。また、当該金属塩を構成する金属原子としては、アルカリ金属及びアルカリ土類金属から選ばれる金属原子が好ましく、ナトリウム、カルシウム、マグネシウム、又はバリウムがより好ましく、カルシウムが更に好ましい。 [Metallic detergent]
The lubricating oil composition of one aspect of the present invention may further contain a metallic detergent. Metal-based detergents may be used alone or in combination of two or more.
Metallic detergents for use in one aspect of the present invention include metal salts such as metal sulfonates, metal salicylates, and metal phenates. The metal atom constituting the metal salt is preferably a metal atom selected from alkali metals and alkaline earth metals, more preferably sodium, calcium, magnesium, or barium, and still more preferably calcium.
本発明の一態様の潤滑油組成物は、さらに金属系清浄剤を含有してもよい。金属系清浄剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる金属系清浄剤としては、金属スルホネート、金属サリシレート、及び金属フェネート等の金属塩が挙げられる。また、当該金属塩を構成する金属原子としては、アルカリ金属及びアルカリ土類金属から選ばれる金属原子が好ましく、ナトリウム、カルシウム、マグネシウム、又はバリウムがより好ましく、カルシウムが更に好ましい。 [Metallic detergent]
The lubricating oil composition of one aspect of the present invention may further contain a metallic detergent. Metal-based detergents may be used alone or in combination of two or more.
Metallic detergents for use in one aspect of the present invention include metal salts such as metal sulfonates, metal salicylates, and metal phenates. The metal atom constituting the metal salt is preferably a metal atom selected from alkali metals and alkaline earth metals, more preferably sodium, calcium, magnesium, or barium, and still more preferably calcium.
本発明の一態様の潤滑油組成物において、金属系清浄剤は、カルシウムスルホネート、カルシウムサリシレート、及びカルシウムフェネートから選ばれる１種以上を含むことが好ましく、カルシウムスルホネートを含むことがより好ましい。
カルシウムスルホネートの含有割合としては、潤滑油組成物に含まれる金属系清浄剤の全量（１００質量％）基準で、好ましくは５０～１００質量％、より好ましくは６０～１００質量％、更に好ましくは７０～１００質量％、より更に好ましくは８０～１００質量％である。 In the lubricating oil composition of one aspect of the present invention, the metallic detergent preferably contains one or more selected from calcium sulfonate, calcium salicylate, and calcium phenate, more preferably calcium sulfonate.
The content of calcium sulfonate is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and still more preferably 70% by mass, based on the total amount (100% by mass) of the metallic detergent contained in the lubricating oil composition. ~100% by mass, more preferably 80 to 100% by mass.
カルシウムスルホネートの含有割合としては、潤滑油組成物に含まれる金属系清浄剤の全量（１００質量％）基準で、好ましくは５０～１００質量％、より好ましくは６０～１００質量％、更に好ましくは７０～１００質量％、より更に好ましくは８０～１００質量％である。 In the lubricating oil composition of one aspect of the present invention, the metallic detergent preferably contains one or more selected from calcium sulfonate, calcium salicylate, and calcium phenate, more preferably calcium sulfonate.
The content of calcium sulfonate is preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and still more preferably 70% by mass, based on the total amount (100% by mass) of the metallic detergent contained in the lubricating oil composition. ~100% by mass, more preferably 80 to 100% by mass.
金属系清浄剤の塩基価としては、好ましくは０～６００ｍｇＫＯＨ／ｇである。
ただし、本発明の一態様の潤滑油組成物において、金属系清浄剤は、塩基価が１００ｍｇＫＯＨ／ｇ以上の過塩基性金属系清浄剤であることが好ましい。
過塩基性金属系清浄剤の塩基価としては、１００ｍｇＫＯＨ／ｇ以上であるが、好ましくは１５０～５００ｍｇＫＯＨ／ｇ、より好ましくは２００～４５０ｍｇＫＯＨ／ｇである。
なお、本明細書において、「塩基価」とは、ＪＩＳ Ｋ２５０１：２００３「石油製品および潤滑油－中和価試験方法」の７．に準拠して測定される過塩素酸法による塩基価を意味する。 The base number of the metallic detergent is preferably 0 to 600 mgKOH/g.
However, in the lubricating oil composition of one aspect of the present invention, the metallic detergent is preferably an overbased metallic detergent having a base value of 100 mgKOH/g or more.
The base number of the overbased metallic detergent is 100 mgKOH/g or more, preferably 150 to 500 mgKOH/g, more preferably 200 to 450 mgKOH/g.
As used herein, the term “base number” refers to 7. of JIS K2501:2003 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
ただし、本発明の一態様の潤滑油組成物において、金属系清浄剤は、塩基価が１００ｍｇＫＯＨ／ｇ以上の過塩基性金属系清浄剤であることが好ましい。
過塩基性金属系清浄剤の塩基価としては、１００ｍｇＫＯＨ／ｇ以上であるが、好ましくは１５０～５００ｍｇＫＯＨ／ｇ、より好ましくは２００～４５０ｍｇＫＯＨ／ｇである。
なお、本明細書において、「塩基価」とは、ＪＩＳ Ｋ２５０１：２００３「石油製品および潤滑油－中和価試験方法」の７．に準拠して測定される過塩素酸法による塩基価を意味する。 The base number of the metallic detergent is preferably 0 to 600 mgKOH/g.
However, in the lubricating oil composition of one aspect of the present invention, the metallic detergent is preferably an overbased metallic detergent having a base value of 100 mgKOH/g or more.
The base number of the overbased metallic detergent is 100 mgKOH/g or more, preferably 150 to 500 mgKOH/g, more preferably 200 to 450 mgKOH/g.
As used herein, the term “base number” refers to 7. of JIS K2501:2003 “Petroleum products and lubricating oils—neutralization value test method”. Means the base number by the perchloric acid method measured in accordance with.
［金属不活性化剤］
本発明の一態様の潤滑油組成物は、さらに金属不活性化剤を含有してもよい。金属不活性化剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる金属不活性化剤としては、例えば、ベンゾトリアゾール系化合物、トリルトリアゾール系化合物、イミダゾール系化合物、ピリミジン系化合物等が挙げられる。 [Metal deactivator]
The lubricating oil composition of one aspect of the present invention may further contain a metal deactivator. The metal deactivators may be used alone or in combination of two or more.
Examples of metal deactivators used in one embodiment of the present invention include benzotriazole-based compounds, tolyltriazole-based compounds, imidazole-based compounds, pyrimidine-based compounds, and the like.
本発明の一態様の潤滑油組成物は、さらに金属不活性化剤を含有してもよい。金属不活性化剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる金属不活性化剤としては、例えば、ベンゾトリアゾール系化合物、トリルトリアゾール系化合物、イミダゾール系化合物、ピリミジン系化合物等が挙げられる。 [Metal deactivator]
The lubricating oil composition of one aspect of the present invention may further contain a metal deactivator. The metal deactivators may be used alone or in combination of two or more.
Examples of metal deactivators used in one embodiment of the present invention include benzotriazole-based compounds, tolyltriazole-based compounds, imidazole-based compounds, pyrimidine-based compounds, and the like.
［摩擦調整剤］
本発明の一態様の潤滑油組成物は、さらに摩擦調整剤を含有してもよい。当該摩擦調整剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる摩擦調整剤としては、例えば、ジチオカルバミン酸モリブデン（ＭｏＤＴＣ）、ジチオリン酸モリブデン（ＭｏＤＴＰ）、モリブテン酸のアミン塩等のモリブデン系摩擦調整剤；炭素数６～３０のアルキル基又はアルケニル基を分子中に少なくとも１個有する、脂肪族アミン、脂肪酸エステル、脂肪酸アミド、脂肪酸、脂肪族アルコール、脂肪族エーテル等の無灰摩擦調整剤；油脂類、アミン、アミド、硫化エステル等が挙げられる。 [Friction modifier]
The lubricating oil composition of one aspect of the present invention may further contain a friction modifier. The friction modifier may be used alone or in combination of two or more.
Examples of friction modifiers used in one aspect of the present invention include molybdenum-based friction modifiers such as molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and amine salts of molybdic acid; alkyl groups having 6 to 30 carbon atoms; or ashless friction modifiers having at least one alkenyl group in the molecule, such as aliphatic amines, fatty acid esters, fatty acid amides, fatty acids, fatty alcohols, and aliphatic ethers; mentioned.
本発明の一態様の潤滑油組成物は、さらに摩擦調整剤を含有してもよい。当該摩擦調整剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる摩擦調整剤としては、例えば、ジチオカルバミン酸モリブデン（ＭｏＤＴＣ）、ジチオリン酸モリブデン（ＭｏＤＴＰ）、モリブテン酸のアミン塩等のモリブデン系摩擦調整剤；炭素数６～３０のアルキル基又はアルケニル基を分子中に少なくとも１個有する、脂肪族アミン、脂肪酸エステル、脂肪酸アミド、脂肪酸、脂肪族アルコール、脂肪族エーテル等の無灰摩擦調整剤；油脂類、アミン、アミド、硫化エステル等が挙げられる。 [Friction modifier]
The lubricating oil composition of one aspect of the present invention may further contain a friction modifier. The friction modifier may be used alone or in combination of two or more.
Examples of friction modifiers used in one aspect of the present invention include molybdenum-based friction modifiers such as molybdenum dithiocarbamate (MoDTC), molybdenum dithiophosphate (MoDTP), and amine salts of molybdic acid; alkyl groups having 6 to 30 carbon atoms; or ashless friction modifiers having at least one alkenyl group in the molecule, such as aliphatic amines, fatty acid esters, fatty acid amides, fatty acids, fatty alcohols, and aliphatic ethers; mentioned.
［防錆剤］
本発明の一態様の潤滑油組成物は、さらに防錆剤を含有してもよい。防錆剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる防錆剤としては、例えば、脂肪酸、アルケニルコハク酸ハーフエステル、脂肪酸セッケン、アルキルスルホン酸塩、多価アルコール脂肪酸エステル、脂肪酸アミン、酸化パラフィン、アルキルポリオキシエチレンエーテル等が挙げられる。 [anti-rust]
The lubricating oil composition of one aspect of the present invention may further contain a rust inhibitor. The rust inhibitor may be used alone or in combination of two or more.
Examples of the rust inhibitor used in one aspect of the present invention include fatty acids, alkenyl succinic acid half esters, fatty acid soaps, alkylsulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, paraffin oxide, alkylpolyoxyethylene ethers, and the like. mentioned.
本発明の一態様の潤滑油組成物は、さらに防錆剤を含有してもよい。防錆剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる防錆剤としては、例えば、脂肪酸、アルケニルコハク酸ハーフエステル、脂肪酸セッケン、アルキルスルホン酸塩、多価アルコール脂肪酸エステル、脂肪酸アミン、酸化パラフィン、アルキルポリオキシエチレンエーテル等が挙げられる。 [anti-rust]
The lubricating oil composition of one aspect of the present invention may further contain a rust inhibitor. The rust inhibitor may be used alone or in combination of two or more.
Examples of the rust inhibitor used in one aspect of the present invention include fatty acids, alkenyl succinic acid half esters, fatty acid soaps, alkylsulfonates, polyhydric alcohol fatty acid esters, fatty acid amines, paraffin oxide, alkylpolyoxyethylene ethers, and the like. mentioned.
［消泡剤］
本発明の一態様の潤滑油組成物は、さらに消泡剤を含有してもよい。消泡剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる消泡剤としては、例えば、シリコーン油、フルオロシリコーン油及びフルオロアルキルエーテル等が挙げられる。 [Antifoaming agent]
The lubricating oil composition of one aspect of the present invention may further contain an antifoaming agent. Antifoaming agents may be used alone or in combination of two or more.
Antifoaming agents used in one aspect of the present invention include, for example, silicone oils, fluorosilicone oils, fluoroalkyl ethers, and the like.
本発明の一態様の潤滑油組成物は、さらに消泡剤を含有してもよい。消泡剤は、単独で用いてもよく、２種以上を併用してもよい。
本発明の一態様で用いる消泡剤としては、例えば、シリコーン油、フルオロシリコーン油及びフルオロアルキルエーテル等が挙げられる。 [Antifoaming agent]
The lubricating oil composition of one aspect of the present invention may further contain an antifoaming agent. Antifoaming agents may be used alone or in combination of two or more.
Antifoaming agents used in one aspect of the present invention include, for example, silicone oils, fluorosilicone oils, fluoroalkyl ethers, and the like.
＜潤滑油組成物の製造方法＞
本発明の一態様の潤滑油組成物の製造方法としては、特に制限はないが、生産性の観点から、成分（Ａ）に、成分（Ｂ）及び（Ｃ）、並びに、必要に応じて、成分（Ｄ）及び成分（Ｂ）～（Ｄ）以外の上述の各種添加剤を配合する工程を有することが好ましい。
ここで、成分（Ａ）～（Ｄ）及び各種添加剤の好適な化合物及び配合量は、上述のとおりである。 <Method for producing lubricating oil composition>
The method for producing the lubricating oil composition of one aspect of the present invention is not particularly limited, but from the viewpoint of productivity, component (A), components (B) and (C), and, if necessary, It is preferable to have a step of blending the above various additives other than the component (D) and the components (B) to (D).
Preferred compounds and blending amounts of components (A) to (D) and various additives are as described above.
本発明の一態様の潤滑油組成物の製造方法としては、特に制限はないが、生産性の観点から、成分（Ａ）に、成分（Ｂ）及び（Ｃ）、並びに、必要に応じて、成分（Ｄ）及び成分（Ｂ）～（Ｄ）以外の上述の各種添加剤を配合する工程を有することが好ましい。
ここで、成分（Ａ）～（Ｄ）及び各種添加剤の好適な化合物及び配合量は、上述のとおりである。 <Method for producing lubricating oil composition>
The method for producing the lubricating oil composition of one aspect of the present invention is not particularly limited, but from the viewpoint of productivity, component (A), components (B) and (C), and, if necessary, It is preferable to have a step of blending the above various additives other than the component (D) and the components (B) to (D).
Preferred compounds and blending amounts of components (A) to (D) and various additives are as described above.
〔潤滑油組成物の性状〕
本発明の一態様の潤滑油組成物の１００℃における動粘度は、絶縁性をより向上させると共に、引火点を高くし、取扱性に優れた潤滑油組成物とする観点から、好ましくは２．１ｍｍ２／ｓ以上、より好ましくは２．２ｍｍ２／ｓ以上、より好ましくは２．４ｍｍ２／ｓ以上、更に好ましくは２．５ｍｍ２／ｓ以上、より更に好ましくは２．７ｍｍ２／ｓ以上、特に好ましくは２．８ｍｍ２／ｓ以上であり、また、冷却性に優れた潤滑油組成物とする観点から、好ましくは５．０ｍｍ２／ｓ未満、より好ましくは４．８ｍｍ２／ｓ以下、より好ましくは４．５ｍｍ２／ｓ以下、より好ましくは４．２ｍｍ２／ｓ以下、更に好ましくは４．１ｍｍ２／ｓ以下、更に好ましくは３．９ｍｍ２／ｓ以下、より更に好ましくは３．７ｍｍ２／ｓ以下、より更に好ましくは３．５ｍｍ２／ｓ以下、特に好ましくは３．２ｍｍ２／ｓ以下であり、さらに、３．０ｍｍ２／ｓ以下、２．８ｍｍ２／ｓ以下、又は２．６ｍｍ２／ｓ以下としてもよい。 [Properties of lubricating oil composition]
The kinematic viscosity at 100° C. of the lubricating oil composition of one embodiment of the present invention is preferably 2. from the viewpoint of further improving the insulating properties, increasing the flash point, and making the lubricating oil composition excellent in handleability. 1 mm 2 /s or more, more preferably 2.2 mm 2 /s or more, more preferably 2.4 mm 2 /s or more, still more preferably 2.5 mm 2 /s or more, still more preferably 2.7 mm 2 /s or more , Particularly preferably 2.8 mm 2 /s or more, and from the viewpoint of making a lubricating oil composition excellent in cooling performance, preferably less than 5.0 mm 2 /s, more preferably 4.8 mm 2 /s or less , more preferably 4.5 mm 2 /s or less, more preferably 4.2 mm 2 /s or less, still more preferably 4.1 mm 2 /s or less, still more preferably 3.9 mm 2 /s or less, still more preferably 3 0.7 mm 2 /s or less, more preferably 3.5 mm 2 /s or less, particularly preferably 3.2 mm 2 /s or less, further preferably 3.0 mm 2 /s or less, 2.8 mm 2 /s or less, Alternatively, it may be 2.6 mm 2 /s or less.
本発明の一態様の潤滑油組成物の１００℃における動粘度は、絶縁性をより向上させると共に、引火点を高くし、取扱性に優れた潤滑油組成物とする観点から、好ましくは２．１ｍｍ２／ｓ以上、より好ましくは２．２ｍｍ２／ｓ以上、より好ましくは２．４ｍｍ２／ｓ以上、更に好ましくは２．５ｍｍ２／ｓ以上、より更に好ましくは２．７ｍｍ２／ｓ以上、特に好ましくは２．８ｍｍ２／ｓ以上であり、また、冷却性に優れた潤滑油組成物とする観点から、好ましくは５．０ｍｍ２／ｓ未満、より好ましくは４．８ｍｍ２／ｓ以下、より好ましくは４．５ｍｍ２／ｓ以下、より好ましくは４．２ｍｍ２／ｓ以下、更に好ましくは４．１ｍｍ２／ｓ以下、更に好ましくは３．９ｍｍ２／ｓ以下、より更に好ましくは３．７ｍｍ２／ｓ以下、より更に好ましくは３．５ｍｍ２／ｓ以下、特に好ましくは３．２ｍｍ２／ｓ以下であり、さらに、３．０ｍｍ２／ｓ以下、２．８ｍｍ２／ｓ以下、又は２．６ｍｍ２／ｓ以下としてもよい。 [Properties of lubricating oil composition]
The kinematic viscosity at 100° C. of the lubricating oil composition of one embodiment of the present invention is preferably 2. from the viewpoint of further improving the insulating properties, increasing the flash point, and making the lubricating oil composition excellent in handleability. 1 mm 2 /s or more, more preferably 2.2 mm 2 /s or more, more preferably 2.4 mm 2 /s or more, still more preferably 2.5 mm 2 /s or more, still more preferably 2.7 mm 2 /s or more , Particularly preferably 2.8 mm 2 /s or more, and from the viewpoint of making a lubricating oil composition excellent in cooling performance, preferably less than 5.0 mm 2 /s, more preferably 4.8 mm 2 /s or less , more preferably 4.5 mm 2 /s or less, more preferably 4.2 mm 2 /s or less, still more preferably 4.1 mm 2 /s or less, still more preferably 3.9 mm 2 /s or less, still more preferably 3 0.7 mm 2 /s or less, more preferably 3.5 mm 2 /s or less, particularly preferably 3.2 mm 2 /s or less, further preferably 3.0 mm 2 /s or less, 2.8 mm 2 /s or less, Alternatively, it may be 2.6 mm 2 /s or less.
本発明の一態様の潤滑油組成物の粘度指数としては、好ましくは８０以上、より好ましくは９０以上、更に好ましくは１００以上、より更に好ましくは１１０以上、特に好ましくは１１７以上である。
The viscosity index of the lubricating oil composition of one embodiment of the present invention is preferably 80 or higher, more preferably 90 or higher, even more preferably 100 or higher, still more preferably 110 or higher, and particularly preferably 117 or higher.
本発明の一態様の潤滑油組成物について、ＡＳＴＭ Ｄ５１８２に準拠し、後述の実施例に記載の条件下で測定したスカッフィングが発生した際の荷重のステージは、好ましくは５以上、より好ましくは６以上、更に好ましくは７以上、より更に好ましくは８以上である。
For the lubricating oil composition of one embodiment of the present invention, the stage of load when scuffing occurs, measured according to ASTM D5182 under the conditions described in Examples below, is preferably 5 or more, more preferably 6. or more, more preferably 7 or more, and even more preferably 8 or more.
本発明の一態様の潤滑油組成物について、ＪＩＳ Ｋ２５１４に準拠するＩＳＯＴ試験を、銅片を触媒として用いて、後述の実施例に記載のとおり、温度１５０℃、７２時間行った際の当該潤滑油組成物の銅溶出量は、好ましくは１５質量ｐｐｍ未満、より好ましくは１４質量ｐｐｍ以下、更に好ましくは１３質量ｐｐｍ以下、より更に好ましくは１２質量ｐｐｍ以下、特に好ましくは１１質量ｐｐｍ以下である。
なお、本明細書において、銅溶出量は、ＪＰＩ－５Ｓ－３８－９２に準拠して測定した値を意味する。 For the lubricating oil composition of one aspect of the present invention, the ISOT test in accordance with JIS K2514 was performed using copper pieces as a catalyst at a temperature of 150 ° C. for 72 hours, as described in the examples below. The copper elution amount of the oil composition is preferably less than 15 mass ppm, more preferably 14 mass ppm or less, still more preferably 13 mass ppm or less, even more preferably 12 mass ppm or less, and particularly preferably 11 mass ppm or less. .
In this specification, the amount of copper elution means a value measured according to JPI-5S-38-92.
なお、本明細書において、銅溶出量は、ＪＰＩ－５Ｓ－３８－９２に準拠して測定した値を意味する。 For the lubricating oil composition of one aspect of the present invention, the ISOT test in accordance with JIS K2514 was performed using copper pieces as a catalyst at a temperature of 150 ° C. for 72 hours, as described in the examples below. The copper elution amount of the oil composition is preferably less than 15 mass ppm, more preferably 14 mass ppm or less, still more preferably 13 mass ppm or less, even more preferably 12 mass ppm or less, and particularly preferably 11 mass ppm or less. .
In this specification, the amount of copper elution means a value measured according to JPI-5S-38-92.
本発明の一態様の潤滑油組成物について、ＣＥＣ Ｌ－４８－Ａ－００（Ｂ）に準拠した酸化安定性試験を、後述の実施例に記載のとおり、温度１６０℃、１９２時間行った際の試験前後での１００℃動粘度増加率は、好ましくは１２％未満、より好ましくは１０％以下、より好ましくは９％以下、更に好ましくは８％以下、更に好ましくは７％以下、より更に好ましくは６％以下、特に好ましくは５％以下である。
なお、１００℃動粘度増加率は、下記式から算出した値であり、動粘度はＪＩＳ Ｋ２２８３：２０００に準拠して測定した値である。
・［１００℃動粘度増粘率（％）］＝（［試験後の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］－［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］）／［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］×１００ The lubricating oil composition of one aspect of the present invention was subjected to an oxidation stability test according to CEC L-48-A-00 (B) at a temperature of 160 ° C. for 192 hours as described in the examples below. The 100 ° C kinematic viscosity increase rate before and after the test is preferably less than 12%, more preferably 10% or less, more preferably 9% or less, still more preferably 8% or less, still more preferably 7% or less, even more preferably is 6% or less, particularly preferably 5% or less.
The 100° C. kinematic viscosity increase rate is a value calculated from the following formula, and the kinematic viscosity is a value measured according to JIS K2283:2000.
・ [100 ° C kinematic viscosity increase rate (%)] = ([100 ° C kinematic viscosity of the lubricating oil composition after the test (mm 2 / s)] - [100 ° C kinematic viscosity of the lubricating oil composition before the test ( mm 2 /s)]) / [100 ° C kinematic viscosity of the lubricating oil composition before the test (mm 2 /s)] × 100
なお、１００℃動粘度増加率は、下記式から算出した値であり、動粘度はＪＩＳ Ｋ２２８３：２０００に準拠して測定した値である。
・［１００℃動粘度増粘率（％）］＝（［試験後の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］－［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］）／［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］×１００ The lubricating oil composition of one aspect of the present invention was subjected to an oxidation stability test according to CEC L-48-A-00 (B) at a temperature of 160 ° C. for 192 hours as described in the examples below. The 100 ° C kinematic viscosity increase rate before and after the test is preferably less than 12%, more preferably 10% or less, more preferably 9% or less, still more preferably 8% or less, still more preferably 7% or less, even more preferably is 6% or less, particularly preferably 5% or less.
The 100° C. kinematic viscosity increase rate is a value calculated from the following formula, and the kinematic viscosity is a value measured according to JIS K2283:2000.
・ [100 ° C kinematic viscosity increase rate (%)] = ([100 ° C kinematic viscosity of the lubricating oil composition after the test (mm 2 / s)] - [100 ° C kinematic viscosity of the lubricating oil composition before the test ( mm 2 /s)]) / [100 ° C kinematic viscosity of the lubricating oil composition before the test (mm 2 /s)] × 100
本発明の一態様の潤滑油組成物について、ＪＩＳ Ｃ２１０１に準拠し、後述の実施例に記載条件下で測定した、当該潤滑油組成物の体積抵抗率は、好ましくは１．７×１０７Ω・ｍ以上、より好ましくは１．９×１０７Ω・ｍ以上、より好ましくは２．０×１０７Ω・ｍ以上、更に好ましくは２．２×１０７Ω・ｍ以上、更に好ましくは２．３×１０７Ω・ｍ以上、より更に好ましくは２．５×１０７Ω・ｍ以上、特に好ましくは２．７×１０７Ω・ｍ以上であり、また、通常１．０×１０9Ω・ｍ以下である。
Regarding the lubricating oil composition of one aspect of the present invention, the volume resistivity of the lubricating oil composition measured under the conditions described in Examples below in accordance with JIS C2101 is preferably 1.7×10 7 Ω. ·m or more, more preferably 1.9 × 10 7 Ω·m or more, more preferably 2.0 × 10 7 Ω·m or more, still more preferably 2.2 × 10 7 Ω·m or more, still more preferably 2 .3×10 7 Ω·m or more, more preferably 2.5×10 7 Ω·m or more, particularly preferably 2.7×10 7 Ω·m or more, and usually 1.0×10 9 Ω·m or less.
〔潤滑油組成物の用途〕
本発明の好適な一態様の潤滑油組成物は、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性等の特性をバランス良く向上させ得る。特に、本発明の好適な一態様の潤滑油組成物は、低粘度化してもこれらの特性を良好に保持することができるため、冷却性の点でも優れている。
このような特性を考慮し、本発明の一態様の潤滑油組成物は、例えば、エンジン、変速機、減速機、圧縮機、油圧装置等の各種装置に組み込まれている、トルクコンバータ、湿式クラッチ、歯車軸受機構、オイルポンプ、油圧制御機構等の機構における潤滑に好適に使用することができる。これらの中でも、本発明の一態様の潤滑油組成物は、減速機の潤滑に用いられることが好ましい。 [Use of lubricating oil composition]
The lubricating oil composition of one preferred embodiment of the present invention can improve properties such as scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties in a well-balanced manner. In particular, the lubricating oil composition of one preferred embodiment of the present invention is excellent in terms of cooling performance because it can maintain these characteristics well even when the viscosity is reduced.
Considering such properties, the lubricating oil composition of one embodiment of the present invention is incorporated in various devices such as engines, transmissions, reduction gears, compressors, hydraulic devices, torque converters, wet clutches, etc. , gear bearing mechanisms, oil pumps, hydraulic control mechanisms, and other mechanisms. Among these, the lubricating oil composition of one embodiment of the present invention is preferably used for lubricating a speed reducer.
本発明の好適な一態様の潤滑油組成物は、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性等の特性をバランス良く向上させ得る。特に、本発明の好適な一態様の潤滑油組成物は、低粘度化してもこれらの特性を良好に保持することができるため、冷却性の点でも優れている。
このような特性を考慮し、本発明の一態様の潤滑油組成物は、例えば、エンジン、変速機、減速機、圧縮機、油圧装置等の各種装置に組み込まれている、トルクコンバータ、湿式クラッチ、歯車軸受機構、オイルポンプ、油圧制御機構等の機構における潤滑に好適に使用することができる。これらの中でも、本発明の一態様の潤滑油組成物は、減速機の潤滑に用いられることが好ましい。 [Use of lubricating oil composition]
The lubricating oil composition of one preferred embodiment of the present invention can improve properties such as scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties in a well-balanced manner. In particular, the lubricating oil composition of one preferred embodiment of the present invention is excellent in terms of cooling performance because it can maintain these characteristics well even when the viscosity is reduced.
Considering such properties, the lubricating oil composition of one embodiment of the present invention is incorporated in various devices such as engines, transmissions, reduction gears, compressors, hydraulic devices, torque converters, wet clutches, etc. , gear bearing mechanisms, oil pumps, hydraulic control mechanisms, and other mechanisms. Among these, the lubricating oil composition of one embodiment of the present invention is preferably used for lubricating a speed reducer.
また、本発明の一態様の潤滑油組成物の上述の特性を考慮すると、本発明は、以下の［１］及び［２］も提供し得る。
［１］基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有し、成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物を用いた、減速機。
［２］基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有し、成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物を減速機の潤滑に適用する、潤滑油組成物の使用。
なお、上記［１］及び［２］に記載の潤滑油組成物の好適な態様は、上述のとおりである。 Moreover, considering the above-mentioned properties of the lubricating oil composition of one aspect of the present invention, the present invention can also provide the following [1] and [2].
[1] Contains a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C), and the content of the component (B) is 0 based on the total amount of the lubricating oil composition less than 60% by mass, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in terms of mass ratio, and boron derived from the component (C) Atom content is 300 mass ppm or less based on the total amount of the lubricating oil composition,
A speed reducer using a lubricating oil composition.
[2] Contains a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C), and the content of the component (B) is 0 based on the total amount of the lubricating oil composition less than 60% by mass, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in terms of mass ratio, and boron derived from the component (C) Atom content is 300 mass ppm or less based on the total amount of the lubricating oil composition,
Use of the lubricating oil composition, wherein the lubricating oil composition is applied to lubricate a speed reducer.
Preferred aspects of the lubricating oil compositions described in [1] and [2] above are as described above.
［１］基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有し、成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物を用いた、減速機。
［２］基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有し、成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物を減速機の潤滑に適用する、潤滑油組成物の使用。
なお、上記［１］及び［２］に記載の潤滑油組成物の好適な態様は、上述のとおりである。 Moreover, considering the above-mentioned properties of the lubricating oil composition of one aspect of the present invention, the present invention can also provide the following [1] and [2].
[1] Contains a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C), and the content of the component (B) is 0 based on the total amount of the lubricating oil composition less than 60% by mass, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in terms of mass ratio, and boron derived from the component (C) Atom content is 300 mass ppm or less based on the total amount of the lubricating oil composition,
A speed reducer using a lubricating oil composition.
[2] Contains a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C), and the content of the component (B) is 0 based on the total amount of the lubricating oil composition less than 60% by mass, the content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in terms of mass ratio, and boron derived from the component (C) Atom content is 300 mass ppm or less based on the total amount of the lubricating oil composition,
Use of the lubricating oil composition, wherein the lubricating oil composition is applied to lubricate a speed reducer.
Preferred aspects of the lubricating oil compositions described in [1] and [2] above are as described above.
次に、本発明を実施例により更に詳細に説明するが、本発明はこれらの例によって何ら限定されるものではない。なお、各種物性の測定法は、下記のとおりである。
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited by these examples. In addition, the measuring method of various physical properties is as follows.
（１）動粘度、粘度指数
ＪＩＳ Ｋ２２８３：２０００に準拠して測定及び算出した。
（２）ホウ素原子、リン原子の含有量
ＪＰＩ－５Ｓ－３８－９２に準拠して測定した。
（３）窒素原子の含有量
ＪＩＳ Ｋ２６０９に準拠して測定した。
（４）硫黄原子の含有量
ＪＩＳ Ｋ２５４１－６：２０１３に準拠して測定した。 (1) Kinematic viscosity and viscosity index Measured and calculated according to JIS K2283:2000.
(2) Contents of Boron Atoms and Phosphorus Atoms Measured according to JPI-5S-38-92.
(3) Nitrogen atom content Measured according to JIS K2609.
(4) Sulfur atom content Measured according to JIS K2541-6:2013.
ＪＩＳ Ｋ２２８３：２０００に準拠して測定及び算出した。
（２）ホウ素原子、リン原子の含有量
ＪＰＩ－５Ｓ－３８－９２に準拠して測定した。
（３）窒素原子の含有量
ＪＩＳ Ｋ２６０９に準拠して測定した。
（４）硫黄原子の含有量
ＪＩＳ Ｋ２５４１－６：２０１３に準拠して測定した。 (1) Kinematic viscosity and viscosity index Measured and calculated according to JIS K2283:2000.
(2) Contents of Boron Atoms and Phosphorus Atoms Measured according to JPI-5S-38-92.
(3) Nitrogen atom content Measured according to JIS K2609.
(4) Sulfur atom content Measured according to JIS K2541-6:2013.
実施例１～１３、比較例１～７
表１に示す種類の基油及び各種添加剤を、表１に示す配合量にて添加して混合し、潤滑油組成物をそれぞれ調製した。当該潤滑油組成物の調製に使用した、各成分の詳細は以下のとおりである。なお、いずれの潤滑油組成物についても、モリブデン原子の含有量は２質量ｐｐｍ未満であった。 Examples 1-13, Comparative Examples 1-7
The types of base oils and various additives shown in Table 1 were added and mixed in the amounts shown in Table 1 to prepare lubricating oil compositions. The details of each component used in the preparation of the lubricating oil composition are as follows. In addition, the content of molybdenum atoms was less than 2 ppm by mass in all lubricating oil compositions.
表１に示す種類の基油及び各種添加剤を、表１に示す配合量にて添加して混合し、潤滑油組成物をそれぞれ調製した。当該潤滑油組成物の調製に使用した、各成分の詳細は以下のとおりである。なお、いずれの潤滑油組成物についても、モリブデン原子の含有量は２質量ｐｐｍ未満であった。 Examples 1-13, Comparative Examples 1-7
The types of base oils and various additives shown in Table 1 were added and mixed in the amounts shown in Table 1 to prepare lubricating oil compositions. The details of each component used in the preparation of the lubricating oil composition are as follows. In addition, the content of molybdenum atoms was less than 2 ppm by mass in all lubricating oil compositions.
＜成分（Ａ）：基油＞
・「鉱油（１）」：６０Ｎ水素化分解鉱油、１００℃動粘度＝２．２ｍｍ２／ｓ、粘度指数＝１０８。
・「鉱油（２）」：１００Ｎ水素化分解鉱油、１００℃動粘度＝４．２ｍｍ２／ｓ、粘度指数＝１２２。 <Component (A): Base oil>
"Mineral oil (1)": 60N hydrocracked mineral oil, 100°C kinematic viscosity = 2.2 mm 2 /s, viscosity index = 108.
"Mineral oil (2)": 100N hydrocracked mineral oil, 100°C kinematic viscosity = 4.2 mm 2 /s, viscosity index = 122.
・「鉱油（１）」：６０Ｎ水素化分解鉱油、１００℃動粘度＝２．２ｍｍ２／ｓ、粘度指数＝１０８。
・「鉱油（２）」：１００Ｎ水素化分解鉱油、１００℃動粘度＝４．２ｍｍ２／ｓ、粘度指数＝１２２。 <Component (A): Base oil>
"Mineral oil (1)": 60N hydrocracked mineral oil, 100°C kinematic viscosity = 2.2 mm 2 /s, viscosity index = 108.
"Mineral oil (2)": 100N hydrocracked mineral oil, 100°C kinematic viscosity = 4.2 mm 2 /s, viscosity index = 122.
＜成分（Ｂ）：チアジアゾール系化合物＞
・「チアジアゾール（分岐鎖）」：２，５－ビス（１，１－ジメチルヘプチルジチオ）－１，３，４－チアジアゾール、前記一般式（ｂ－１）中、ｍ＝ｎ＝２、Ｒ１及びＲ２が１，１－ジメチルヘプチル基であるチアジアゾール。硫黄原子含有量＝３３．３質量％、窒素原子含有量＝６．４質量％。 <Component (B): Thiadiazole compound>
・ “Thiadiazole (branched chain)”: 2,5-bis(1,1-dimethylheptyldithio)-1,3,4-thiadiazole, m=n=2, R 1 in the general formula (b-1) and thiadiazoles in which R 2 is a 1,1-dimethylheptyl group. Sulfur atom content = 33.3 mass%, nitrogen atom content = 6.4 mass%.
・「チアジアゾール（分岐鎖）」：２，５－ビス（１，１－ジメチルヘプチルジチオ）－１，３，４－チアジアゾール、前記一般式（ｂ－１）中、ｍ＝ｎ＝２、Ｒ１及びＲ２が１，１－ジメチルヘプチル基であるチアジアゾール。硫黄原子含有量＝３３．３質量％、窒素原子含有量＝６．４質量％。 <Component (B): Thiadiazole compound>
・ “Thiadiazole (branched chain)”: 2,5-bis(1,1-dimethylheptyldithio)-1,3,4-thiadiazole, m=n=2, R 1 in the general formula (b-1) and thiadiazoles in which R 2 is a 1,1-dimethylheptyl group. Sulfur atom content = 33.3 mass%, nitrogen atom content = 6.4 mass%.
＜成分（Ｃ）：ホウ素変性アルケニルコハク酸イミド＞
・「Ｂ変性ポリブテニルコハク酸ビスイミド（１）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝１．１。
・「Ｂ変性ポリブテニルコハク酸ビスイミド（２）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝０．９。
・「Ｂ変性ポリブテニルコハク酸ビスイミド（３）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝０．５。
・「Ｂ変性ポリブテニルコハク酸ビスイミド（４）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝０．２。 <Component (C): Boron-modified alkenyl succinimide>
- "B-modified polybutenylsuccinic acid bisimide (1)": boron-modified polybutenylsuccinic acid bisimide having a polybutenyl group, B/N = 1.1.
- "B-modified polybutenylsuccinic acid bisimide (2)": boron-modified polybutenylsuccinic acid bisimide having a polybutenyl group, B/N = 0.9.
- "B-modified polybutenyl bisimide (3)": boron-modified polybutenyl bisimide having a polybutenyl group, B/N = 0.5.
- "B-modified polybutenylsuccinic acid bisimide (4)": boron-modified polybutenylsuccinic acid bisimide having a polybutenyl group, B/N = 0.2.
・「Ｂ変性ポリブテニルコハク酸ビスイミド（１）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝１．１。
・「Ｂ変性ポリブテニルコハク酸ビスイミド（２）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝０．９。
・「Ｂ変性ポリブテニルコハク酸ビスイミド（３）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝０．５。
・「Ｂ変性ポリブテニルコハク酸ビスイミド（４）」：ポリブテニル基を有するポリブテニルコハク酸ビスイミドのホウ素変性物、Ｂ／Ｎ＝０．２。 <Component (C): Boron-modified alkenyl succinimide>
- "B-modified polybutenylsuccinic acid bisimide (1)": boron-modified polybutenylsuccinic acid bisimide having a polybutenyl group, B/N = 1.1.
- "B-modified polybutenylsuccinic acid bisimide (2)": boron-modified polybutenylsuccinic acid bisimide having a polybutenyl group, B/N = 0.9.
- "B-modified polybutenyl bisimide (3)": boron-modified polybutenyl bisimide having a polybutenyl group, B/N = 0.5.
- "B-modified polybutenylsuccinic acid bisimide (4)": boron-modified polybutenylsuccinic acid bisimide having a polybutenyl group, B/N = 0.2.
＜成分（Ｄ）：リン系化合物＞
・「硫黄リン系化合物」：前記一般式（ｃ－１１）中のａ１＝２、ＲＡ１１＝ｎ－オクチル基である硫黄原子含有亜リン酸エステルと、前記一般式（ｃ－１２）中のａ２＝ａ３＝２、ＲＡ２１、ＲＡ２２＝ｎ－オクチル基である硫黄原子含有亜リン酸エステルとの混合物。リン原子含有量＝１０質量％、硫黄原子含有量＝１０．７質量％。 <Component (D): Phosphorus compound>
- "Sulfur phosphorus-based compound": a sulfur atom-containing phosphite ester in which a1 = 2 and R A11 =n-octyl group in general formula (c-11), and general formula (c-12) A mixture with a sulfur atom-containing phosphite in which a2=a3=2, R A21 , R A22 =n-octyl groups. Phosphorus atom content = 10% by mass, sulfur atom content = 10.7% by mass.
・「硫黄リン系化合物」：前記一般式（ｃ－１１）中のａ１＝２、ＲＡ１１＝ｎ－オクチル基である硫黄原子含有亜リン酸エステルと、前記一般式（ｃ－１２）中のａ２＝ａ３＝２、ＲＡ２１、ＲＡ２２＝ｎ－オクチル基である硫黄原子含有亜リン酸エステルとの混合物。リン原子含有量＝１０質量％、硫黄原子含有量＝１０．７質量％。 <Component (D): Phosphorus compound>
- "Sulfur phosphorus-based compound": a sulfur atom-containing phosphite ester in which a1 = 2 and R A11 =n-octyl group in general formula (c-11), and general formula (c-12) A mixture with a sulfur atom-containing phosphite in which a2=a3=2, R A21 , R A22 =n-octyl groups. Phosphorus atom content = 10% by mass, sulfur atom content = 10.7% by mass.
＜無灰分散剤＞
・「非変性ポリブテニルコハク酸ビスイミド」：ポリブテニル基を有するポリブテニルコハク酸ビスイミド、窒素原子含有量＝１．８質量％。
＜他の添加剤＞
・「添加剤混合物」：流動点降下剤、酸化防止剤、金属系清浄剤、分散剤、金属不活性化剤、摩擦調整剤、及び消泡剤の混合物。 <Ashless dispersant>
- "Unmodified polybutenylsuccinic acid bisimide": polybutenylsuccinic acid bisimide having a polybutenyl group, nitrogen atom content = 1.8% by mass.
<Other additives>
• "Additive Mixture": a mixture of pour point depressants, antioxidants, metallic detergents, dispersants, metal deactivators, friction modifiers, and defoamers.
・「非変性ポリブテニルコハク酸ビスイミド」：ポリブテニル基を有するポリブテニルコハク酸ビスイミド、窒素原子含有量＝１．８質量％。
＜他の添加剤＞
・「添加剤混合物」：流動点降下剤、酸化防止剤、金属系清浄剤、分散剤、金属不活性化剤、摩擦調整剤、及び消泡剤の混合物。 <Ashless dispersant>
- "Unmodified polybutenylsuccinic acid bisimide": polybutenylsuccinic acid bisimide having a polybutenyl group, nitrogen atom content = 1.8% by mass.
<Other additives>
• "Additive Mixture": a mixture of pour point depressants, antioxidants, metallic detergents, dispersants, metal deactivators, friction modifiers, and defoamers.
調製した潤滑油組成物について、動粘度及び粘度指数を測定及び算出すると共に、以下の試験を行った。これらの結果を表１及び表２に示す。
For the prepared lubricating oil composition, the kinematic viscosity and viscosity index were measured and calculated, and the following tests were conducted. These results are shown in Tables 1 and 2.
（１）ＦＺＧスカッフィング試験（Ａ１０／１６．６Ｒ／９０）
ＡＳＴＭ Ｄ５１８２に準拠し、Ａ１０タイプ歯車を用いて、試料油温度９０℃、回転数２９００ｒｐｍ、運転時間約７．５分間の条件下で、規定に沿って段階的に荷重を上げ、スカッフィングが発生した際の荷重のステージを求めた。当該ステージの値が高いほど、ギヤ耐スカッフィング性に優れた潤滑油組成物であるといえる。 (1) FZG scuffing test (A10/16.6R/90)
Based on ASTM D5182, using A10 type gears, under the conditions of sample oil temperature of 90°C, rotation speed of 2900 rpm, and operation time of about 7.5 minutes, the load was increased stepwise according to the regulations, and scuffing occurred. The stage of the load at the time was obtained. It can be said that the higher the stage value, the better the gear scuffing resistance of the lubricating oil composition.
ＡＳＴＭ Ｄ５１８２に準拠し、Ａ１０タイプ歯車を用いて、試料油温度９０℃、回転数２９００ｒｐｍ、運転時間約７．５分間の条件下で、規定に沿って段階的に荷重を上げ、スカッフィングが発生した際の荷重のステージを求めた。当該ステージの値が高いほど、ギヤ耐スカッフィング性に優れた潤滑油組成物であるといえる。 (1) FZG scuffing test (A10/16.6R/90)
Based on ASTM D5182, using A10 type gears, under the conditions of sample oil temperature of 90°C, rotation speed of 2900 rpm, and operation time of about 7.5 minutes, the load was increased stepwise according to the regulations, and scuffing occurred. The stage of the load at the time was obtained. It can be said that the higher the stage value, the better the gear scuffing resistance of the lubricating oil composition.
（２）銅溶出試験
ＪＩＳ Ｋ２５１４に準拠するＩＳＯＴ試験を、銅片及び鉄片を触媒として用いて、温度１５０℃、７２時間行い、試料油を劣化させた。劣化後の試料油に対して、ＪＰＩ－５Ｓ－３８－９２に準拠した方法にて、銅溶出量（単位：質量ｐｐｍ）を測定した。当該銅溶出量の値が少ないほど、銅溶出抑制効果の高い潤滑油組成物であるといえる。 (2) Copper Elution Test An ISOT test in accordance with JIS K2514 was performed using copper pieces and iron pieces as catalysts at a temperature of 150° C. for 72 hours to degrade the sample oil. The copper elution amount (unit: mass ppm) was measured for the deteriorated sample oil by a method based on JPI-5S-38-92. It can be said that the smaller the value of the copper elution amount, the higher the copper elution inhibitory effect of the lubricating oil composition.
ＪＩＳ Ｋ２５１４に準拠するＩＳＯＴ試験を、銅片及び鉄片を触媒として用いて、温度１５０℃、７２時間行い、試料油を劣化させた。劣化後の試料油に対して、ＪＰＩ－５Ｓ－３８－９２に準拠した方法にて、銅溶出量（単位：質量ｐｐｍ）を測定した。当該銅溶出量の値が少ないほど、銅溶出抑制効果の高い潤滑油組成物であるといえる。 (2) Copper Elution Test An ISOT test in accordance with JIS K2514 was performed using copper pieces and iron pieces as catalysts at a temperature of 150° C. for 72 hours to degrade the sample oil. The copper elution amount (unit: mass ppm) was measured for the deteriorated sample oil by a method based on JPI-5S-38-92. It can be said that the smaller the value of the copper elution amount, the higher the copper elution inhibitory effect of the lubricating oil composition.
（３）酸化安定性試験
ＣＥＣ Ｌ－４８－Ａ－００（Ｂ）に準拠して、１６０℃で１９２時間の条件で、酸化安定性試験を行った。そして、試験後の潤滑油組成物の１００℃動粘度をＪＩＳ Ｋ２２８３：２０００に準拠して測定し、下記式から１００℃動粘度増粘率を算出した。
・［１００℃動粘度増粘率（％）］＝（［試験後の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］－［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］）／［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］×１００ (3) Oxidation Stability Test According to CEC L-48-A-00(B), an oxidation stability test was conducted at 160° C. for 192 hours. Then, the 100° C. kinematic viscosity of the lubricating oil composition after the test was measured according to JIS K2283:2000, and the 100° C. kinematic viscosity increase rate was calculated from the following formula.
・ [100 ° C kinematic viscosity increase rate (%)] = ([100 ° C kinematic viscosity of the lubricating oil composition after the test (mm 2 / s)] - [100 ° C kinematic viscosity of the lubricating oil composition before the test ( mm 2 /s)]) / [100 ° C kinematic viscosity of the lubricating oil composition before the test (mm 2 /s)] × 100
ＣＥＣ Ｌ－４８－Ａ－００（Ｂ）に準拠して、１６０℃で１９２時間の条件で、酸化安定性試験を行った。そして、試験後の潤滑油組成物の１００℃動粘度をＪＩＳ Ｋ２２８３：２０００に準拠して測定し、下記式から１００℃動粘度増粘率を算出した。
・［１００℃動粘度増粘率（％）］＝（［試験後の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］－［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］）／［試験前の潤滑油組成物の１００℃動粘度（ｍｍ２／ｓ）］×１００ (3) Oxidation Stability Test According to CEC L-48-A-00(B), an oxidation stability test was conducted at 160° C. for 192 hours. Then, the 100° C. kinematic viscosity of the lubricating oil composition after the test was measured according to JIS K2283:2000, and the 100° C. kinematic viscosity increase rate was calculated from the following formula.
・ [100 ° C kinematic viscosity increase rate (%)] = ([100 ° C kinematic viscosity of the lubricating oil composition after the test (mm 2 / s)] - [100 ° C kinematic viscosity of the lubricating oil composition before the test ( mm 2 /s)]) / [100 ° C kinematic viscosity of the lubricating oil composition before the test (mm 2 /s)] × 100
（４）絶縁性試験
ＪＩＳ Ｃ２１０１に準拠して、測定温度８０℃、印加電圧２５０Ｖ、測定時間１分間の試験条件において、試料油の体積抵抗率を測定した。当該体積抵抗率の値が高いほど、絶縁性に優れた潤滑油組成物であるといえる。 (4) Insulation test In conformity with JIS C2101, the volume resistivity of the sample oil was measured under test conditions of a measurement temperature of 80°C, an applied voltage of 250V, and a measurement time of 1 minute. It can be said that the higher the value of the volume resistivity, the more excellent the insulating properties of the lubricating oil composition.
ＪＩＳ Ｃ２１０１に準拠して、測定温度８０℃、印加電圧２５０Ｖ、測定時間１分間の試験条件において、試料油の体積抵抗率を測定した。当該体積抵抗率の値が高いほど、絶縁性に優れた潤滑油組成物であるといえる。 (4) Insulation test In conformity with JIS C2101, the volume resistivity of the sample oil was measured under test conditions of a measurement temperature of 80°C, an applied voltage of 250V, and a measurement time of 1 minute. It can be said that the higher the value of the volume resistivity, the more excellent the insulating properties of the lubricating oil composition.
表１より、実施例１～１３の潤滑油組成物は、耐スカッフィング性、銅溶出抑制効果、酸化安定性、及び絶縁性の特性がいずれもがバランス良く優れた結果となった。
一方で、表２より、比較例１の潤滑油組成物は、酸化安定性が劣り、比較例２～３及び６～７の潤滑油組成物は、銅溶出抑制効果が劣る結果となった。さらに、比較例４～５の潤滑油組成物は、耐スカッフィング性と共に絶縁性も劣る結果となった。 As can be seen from Table 1, the lubricating oil compositions of Examples 1 to 13 had well-balanced and excellent scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties.
On the other hand, from Table 2, the lubricating oil composition of Comparative Example 1 was inferior in oxidation stability, and the lubricating oil compositions of Comparative Examples 2-3 and 6-7 were inferior in copper elution inhibitory effect. Furthermore, the lubricating oil compositions of Comparative Examples 4 and 5 were inferior in scuffing resistance and insulation.
一方で、表２より、比較例１の潤滑油組成物は、酸化安定性が劣り、比較例２～３及び６～７の潤滑油組成物は、銅溶出抑制効果が劣る結果となった。さらに、比較例４～５の潤滑油組成物は、耐スカッフィング性と共に絶縁性も劣る結果となった。 As can be seen from Table 1, the lubricating oil compositions of Examples 1 to 13 had well-balanced and excellent scuffing resistance, copper elution inhibitory effect, oxidation stability, and insulating properties.
On the other hand, from Table 2, the lubricating oil composition of Comparative Example 1 was inferior in oxidation stability, and the lubricating oil compositions of Comparative Examples 2-3 and 6-7 were inferior in copper elution inhibitory effect. Furthermore, the lubricating oil compositions of Comparative Examples 4 and 5 were inferior in scuffing resistance and insulation.
Claims (14)
- 基油（Ａ）、チアジアゾール系化合物（Ｂ）、及びホウ素変性アルケニルコハク酸イミド（Ｃ）を含有する潤滑油組成物であって、
成分（Ｂ）の含有量が、前記潤滑油組成物の全量基準で、０．６０質量％未満であり、
成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５以上であり、
成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３００質量ｐｐｍ以下である、
潤滑油組成物。 A lubricating oil composition containing a base oil (A), a thiadiazole compound (B), and a boron-modified alkenylsuccinimide (C),
The content of component (B) is less than 0.60% by mass based on the total amount of the lubricating oil composition,
The content ratio [B/N] of boron atoms and nitrogen atoms derived from the component (C) is 0.35 or more in mass ratio,
The content of boron atoms derived from the component (C) is 300 mass ppm or less based on the total amount of the lubricating oil composition.
lubricating oil composition. - 成分（Ｃ）に由来する窒素原子の含有量が、前記潤滑油組成物の全量基準で、３２０質量ｐｐｍ以下である、請求項１に記載の潤滑油組成物。 The lubricating oil composition according to claim 1, wherein the content of nitrogen atoms derived from component (C) is 320 mass ppm or less based on the total amount of the lubricating oil composition.
- 成分（Ｃ）に由来する窒素原子の含有量が、前記潤滑油組成物の全量基準で、５．０～３２０質量ｐｐｍである、請求項１又は２に記載の潤滑油組成物。 The lubricating oil composition according to claim 1 or 2, wherein the content of nitrogen atoms derived from component (C) is 5.0 to 320 mass ppm based on the total amount of the lubricating oil composition.
- 成分（Ｃ）に由来するホウ素原子と窒素原子の含有量比［Ｂ／Ｎ］が、質量比で、０．３５～２．０である、請求項１～３のいずれか一項に記載の潤滑油組成物。 The content ratio [B/N] of boron atoms and nitrogen atoms derived from component (C) is 0.35 to 2.0 in mass ratio, according to any one of claims 1 to 3. lubricating oil composition.
- 成分（Ｃ）に由来するホウ素原子の含有量が、前記潤滑油組成物の全量基準で、３．０～３００質量ｐｐｍである、請求項１～４のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 4, wherein the content of boron atoms derived from component (C) is 3.0 to 300 ppm by mass based on the total amount of the lubricating oil composition. thing.
- 成分（Ｃ）が、ホウ素変性アルケニルコハク酸ビスイミド（Ｃ１）を含む、請求項１～５のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 5, wherein component (C) comprises boron-modified alkenylsuccinic acid bisimide (C1).
- 成分（Ｂ）が、分岐鎖アルキル基を有するチアジアゾール系化合物（Ｂ１）を含む、請求項１～６のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 6, wherein component (B) contains a thiadiazole compound (B1) having a branched chain alkyl group.
- 硫化オレフィンの含有量が、前記潤滑油組成物の全量基準で、０．２０質量％未満である、請求項１～７のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 7, wherein the content of the sulfurized olefin is less than 0.20% by mass based on the total amount of the lubricating oil composition.
- 前記潤滑油組成物の１００℃における動粘度が２．１ｍｍ２／ｓ以上５．０ｍｍ２／ｓ未満である、請求項１～８のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 8, wherein the lubricating oil composition has a kinematic viscosity at 100°C of 2.1 mm 2 /s or more and less than 5.0 mm 2 /s.
- さらにリン酸エステル及び亜リン酸エステルから選ばれる１種以上のリン系化合物（Ｄ）を含有する、請求項１～９のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 9, further comprising one or more phosphorus compounds (D) selected from phosphates and phosphites.
- 成分（Ｄ）が、硫黄原子含有リン酸エステル及び硫黄原子含有亜リン酸エステルから選ばれる１種以上の硫黄リン系化合物（Ｄ１）を含む、請求項１０に記載の潤滑油組成物。 The lubricating oil composition according to claim 10, wherein the component (D) comprises one or more sulfur phosphorus compounds (D1) selected from sulfur atom-containing phosphates and sulfur atom-containing phosphites.
- 減速機の潤滑に用いられる、請求項１～１１のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 11, which is used for lubricating a speed reducer.
- 請求項１～１２のいずれか一項に記載の潤滑油組成物を適用した、減速機。 A speed reducer to which the lubricating oil composition according to any one of claims 1 to 12 is applied.
- 請求項１～１２のいずれか一項に記載の潤滑油組成物を減速機の潤滑に適用する、潤滑油組成物の使用。 Use of a lubricating oil composition, wherein the lubricating oil composition according to any one of claims 1 to 12 is applied to lubricate a speed reducer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012193255A (en) | 2011-03-16 | 2012-10-11 | Jx Nippon Oil & Energy Corp | Gear oil composition |
| JP2014159496A (en) * | 2013-02-19 | 2014-09-04 | Jx Nippon Oil & Energy Corp | Lubricant composition for transmission |
| JP2019038961A (en) * | 2017-08-28 | 2019-03-14 | Ｊｘｔｇエネルギー株式会社 | Lubricating oil composition for manual transmissions |
| WO2019177125A1 (en) * | 2018-03-14 | 2019-09-19 | 出光興産株式会社 | Lubricating oil composition |
| JP2020090558A (en) * | 2018-12-03 | 2020-06-11 | Ｅｍｇルブリカンツ合同会社 | Lubricant composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012193255A (en) | 2011-03-16 | 2012-10-11 | Jx Nippon Oil & Energy Corp | Gear oil composition |
| JP2014159496A (en) * | 2013-02-19 | 2014-09-04 | Jx Nippon Oil & Energy Corp | Lubricant composition for transmission |
| JP2019038961A (en) * | 2017-08-28 | 2019-03-14 | Ｊｘｔｇエネルギー株式会社 | Lubricating oil composition for manual transmissions |
| WO2019177125A1 (en) * | 2018-03-14 | 2019-09-19 | 出光興産株式会社 | Lubricating oil composition |
| JP2020090558A (en) * | 2018-12-03 | 2020-06-11 | Ｅｍｇルブリカンツ合同会社 | Lubricant composition |
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