JP2013170217A - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
- Publication number
- JP2013170217A JP2013170217A JP2012034996A JP2012034996A JP2013170217A JP 2013170217 A JP2013170217 A JP 2013170217A JP 2012034996 A JP2012034996 A JP 2012034996A JP 2012034996 A JP2012034996 A JP 2012034996A JP 2013170217 A JP2013170217 A JP 2013170217A
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- JP
- Japan
- Prior art keywords
- less
- viscosity
- lubricating
- lubricating oil
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000010687 lubricating oil Substances 0.000 title claims abstract description 94
- 239000000203 mixture Substances 0.000 title claims abstract description 82
- 239000002199 base oil Substances 0.000 claims abstract description 104
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 58
- 239000002184 metal Substances 0.000 claims description 58
- -1 alkaline earth metal salicylate Chemical class 0.000 claims description 43
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 29
- 239000003599 detergent Substances 0.000 claims description 24
- 239000003607 modifier Substances 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- 239000011733 molybdenum Substances 0.000 claims description 9
- 229960001860 salicylate Drugs 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 67
- 239000000446 fuel Substances 0.000 abstract description 45
- 239000003795 chemical substances by application Substances 0.000 abstract description 11
- 239000012459 cleaning agent Substances 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 description 32
- 239000003921 oil Substances 0.000 description 25
- 150000001875 compounds Chemical class 0.000 description 23
- 239000000654 additive Substances 0.000 description 21
- 125000000217 alkyl group Chemical group 0.000 description 21
- 150000002430 hydrocarbons Chemical group 0.000 description 21
- 238000000034 method Methods 0.000 description 20
- 229910052717 sulfur Inorganic materials 0.000 description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 17
- 230000000694 effects Effects 0.000 description 17
- 239000011593 sulfur Substances 0.000 description 17
- 150000003839 salts Chemical class 0.000 description 16
- 230000000996 additive effect Effects 0.000 description 15
- 125000003342 alkenyl group Chemical group 0.000 description 14
- 239000002585 base Substances 0.000 description 13
- 239000000178 monomer Substances 0.000 description 12
- 229920006395 saturated elastomer Polymers 0.000 description 12
- 239000011575 calcium Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000005461 lubrication Methods 0.000 description 10
- 239000005078 molybdenum compound Substances 0.000 description 10
- 150000002752 molybdenum compounds Chemical class 0.000 description 10
- 239000010705 motor oil Substances 0.000 description 10
- 238000011282 treatment Methods 0.000 description 10
- 239000002904 solvent Substances 0.000 description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- 239000003963 antioxidant agent Substances 0.000 description 8
- 125000003118 aryl group Chemical group 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 8
- 238000004517 catalytic hydrocracking Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229920001577 copolymer Polymers 0.000 description 8
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- 238000004821 distillation Methods 0.000 description 7
- 239000002480 mineral oil Substances 0.000 description 7
- 235000010446 mineral oil Nutrition 0.000 description 7
- 230000002265 prevention Effects 0.000 description 7
- 238000007670 refining Methods 0.000 description 7
- 150000001342 alkaline earth metals Chemical class 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 150000004678 hydrides Chemical class 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 5
- 125000004122 cyclic group Chemical group 0.000 description 5
- 239000002270 dispersing agent Substances 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 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 5
- 239000002994 raw material Substances 0.000 description 5
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 150000001412 amines Chemical group 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 150000002751 molybdenum Chemical class 0.000 description 4
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical compound O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 4
- 229920013639 polyalphaolefin Polymers 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007866 anti-wear additive Substances 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 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 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- KZNICNPSHKQLFF-UHFFFAOYSA-N dihydromaleimide Natural products O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical class [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 3
- AFFLGGQVNFXPEV-UHFFFAOYSA-N n-decene Natural products CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- 125000004430 oxygen atom Chemical group O* 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000005077 polysulfide Substances 0.000 description 3
- 229920001021 polysulfide Polymers 0.000 description 3
- 150000008117 polysulfides Polymers 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1-dodecene Chemical compound CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-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
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 2
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 2
- 150000004996 alkyl benzenes Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 2
- 150000001993 dienes Chemical class 0.000 description 2
- QXYJCZRRLLQGCR-UHFFFAOYSA-N dioxomolybdenum Chemical compound O=[Mo]=O QXYJCZRRLLQGCR-UHFFFAOYSA-N 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003925 fat Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 2
- 125000000623 heterocyclic group Chemical group 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- OSWPMRLSEDHDFF-UHFFFAOYSA-N methyl salicylate Chemical compound COC(=O)C1=CC=CC=C1O OSWPMRLSEDHDFF-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
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- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 2
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 2
- 238000005292 vacuum distillation Methods 0.000 description 2
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- UUGXDEDGRPYWHG-UHFFFAOYSA-N (dimethylamino)methyl 2-methylprop-2-enoate Chemical compound CN(C)COC(=O)C(C)=C UUGXDEDGRPYWHG-UHFFFAOYSA-N 0.000 description 1
- MBIZXFATKUQOOA-UHFFFAOYSA-N 1,3,4-thiadiazole Chemical compound C1=NN=CS1 MBIZXFATKUQOOA-UHFFFAOYSA-N 0.000 description 1
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical class C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
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- VRMHHVOBVLFRFB-UHFFFAOYSA-N 2-(2-cyanoethylsulfanylmethyl)benzoic acid Chemical compound OC(=O)C1=CC=CC=C1CSCCC#N VRMHHVOBVLFRFB-UHFFFAOYSA-N 0.000 description 1
- SJIXRGNQPBQWMK-UHFFFAOYSA-N 2-(diethylamino)ethyl 2-methylprop-2-enoate Chemical compound CCN(CC)CCOC(=O)C(C)=C SJIXRGNQPBQWMK-UHFFFAOYSA-N 0.000 description 1
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 1
- LLEFDCACDRGBKD-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;nonanoic acid Chemical compound CCC(CO)(CO)CO.CCCCCCCCC(O)=O LLEFDCACDRGBKD-UHFFFAOYSA-N 0.000 description 1
- CWTQBXKJKDAOSQ-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;octanoic acid Chemical compound CCC(CO)(CO)CO.CCCCCCCC(O)=O CWTQBXKJKDAOSQ-UHFFFAOYSA-N 0.000 description 1
- MNZNJOQNLFEAKG-UHFFFAOYSA-N 2-morpholin-4-ylethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCN1CCOCC1 MNZNJOQNLFEAKG-UHFFFAOYSA-N 0.000 description 1
- ALKCLFLTXBBMMP-UHFFFAOYSA-N 3,7-dimethylocta-1,6-dien-3-yl hexanoate Chemical compound CCCCCC(=O)OC(C)(C=C)CCC=C(C)C ALKCLFLTXBBMMP-UHFFFAOYSA-N 0.000 description 1
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-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
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
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- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- URGQBRTWLCYCMR-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] nonanoate Chemical compound CCCCCCCCC(=O)OCC(CO)(CO)CO URGQBRTWLCYCMR-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
- QCJQWJKKTGJDCM-UHFFFAOYSA-N [P].[S] Chemical compound [P].[S] QCJQWJKKTGJDCM-UHFFFAOYSA-N 0.000 description 1
- 125000000738 acetamido group Chemical group [H]C([H])([H])C(=O)N([H])[*] 0.000 description 1
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Abstract
【解決手段】100℃における動粘度が1〜5mm2/sである潤滑油基油と、(A)重量平均分子量(Mw)が40万以下でPSSIが20以下の粘度指数向上剤と、(B1)炭素数20以上の直鎖状もしくは分岐鎖状の炭化水素基を有する金属系清浄剤と、(C)摩擦調整剤と、を含有し、150℃におけるHTHS粘度が2.6mPa・s未満であることを特徴とする潤滑油組成物。
【選択図】なし
Description
例えば、一般的な省燃費化の手法として、潤滑油の動粘度の低減および粘度指数の向上(低粘度基油と粘度指数向上剤の組合せによるマルチグレード化)や摩擦低減剤の配合が知られている。低粘度化の場合、潤滑油またはそれを構成する基油の粘度の低減に起因して、厳しい潤滑条件下(高温高せん断条件下)での潤滑性能が低下し、摩耗や焼付き、疲労破壊等の不具合の発生が懸念される。また、摩擦低減剤の配合については、無灰系やモリブデン系の摩擦調整剤が知られているが、一般的なこれら摩擦低減剤配合油をさらに上回る省燃費油が求められている。
しかしながら、近年のエンジン技術の進歩により、エンジンの耐久性を維持しながら150℃におけるHTHS粘度を低減することが可能となった。更なる省燃費性の向上のため、例えばSAE 0W−20エンジン油の150℃におけるHTHS粘度の下限である2.6mPa・sを下回るエンジン油が開発、適用されている。しかしながら、150℃におけるHTHS粘度が2.6mPa・sを下回るエンジン油は、一部のエンジンや部品において金属同士が接触する境界潤滑領域の摩擦係数を上昇させ、逆に省燃費性を悪化させることが確認されている。
150℃におけるHTHS粘度が2.6mPa・sを下回るエンジン油を適用した全てのエンジンの省燃費性を向上するためには、境界潤滑領域の摩擦係数をこれまで以上に低減する技術が必要である。
(1)パラフィン基系原油および/または混合基系原油の常圧蒸留による留出油
(2)パラフィン基系原油および/または混合基系原油の常圧蒸留残渣油の減圧蒸留による留出油(WVGO)
(3)潤滑油脱ろう工程により得られるワックス(スラックワックス等)および/またはガストゥリキッド(GTL)プロセス等により得られる合成ワックス(フィッシャートロプシュワックス、GTLワックス等)
(4)基油(1)〜(3)から選ばれる1種または2種以上の混合油および/または当該混合油のマイルドハイドロクラッキング処理油
(5)基油(1)〜(4)から選ばれる2種以上の混合油
(6)基油(1)、(2)、(3)、(4)または(5)の脱れき油(DAO)
(7)基油(6)のマイルドハイドロクラッキング処理油(MHC)
(8)基油(1)〜(7)から選ばれる2種以上の混合油。
(9)上記基油(1)〜(8)から選ばれる基油または当該基油から回収された潤滑油留分を水素化分解し、その生成物またはその生成物から蒸留等により回収される潤滑油留分について溶剤脱ろうや接触脱ろうなどの脱ろう処理を行い、または当該脱ろう処理をした後に蒸留することによって得られる水素化分解基油
(10)上記基油(1)〜(8)から選ばれる基油または当該基油から回収された潤滑油留分を水素化異性化し、その生成物またはその生成物から蒸留等により回収される潤滑油留分について溶剤脱ろうや接触脱ろうなどの脱ろう処理を行い、または、当該脱ろう処理をしたあとに蒸留することによって得られる水素化異性化基油。
なお、本発明でいう15℃における密度とは、JIS K 2249−1995に準拠して15℃において測定された密度を意味する。
また、飽和分の分離方法、あるいは環状飽和分、非環状飽和分等の組成分析の際には、同様の結果が得られる類似の方法を使用することができる。例えば、上記の他、ASTM
D 2425−93に記載の方法、ASTM D 2549−91に記載の方法、高速液体クロマトグラフィ(HPLC)による方法、あるいはこれらの方法を改良した方法等を挙げることができる。
また、本発明に係る潤滑油基油と併用される他の合成系基油としては、100℃における動粘度が1〜5mm2/sの範囲外である、前記した合成系基油が挙げられる。
金属比は3.2以下であることが好ましく、より好ましくは3.0以下、さらに好ましくは2.8以下、特に好ましくは2.6以下、最も好ましくは2.5以下に調整されてなる金属系清浄剤である。金属比が4.0を超えると摩擦トルクの低減すなわち省燃費性が不十分となる可能性がある。
また金属比は1.0以上であることが好ましく、より好ましくは1.1以上、さらに好ましくは1.5以上、特に好ましくは1.9以上に、最も好ましくは2.2以上に調整されてなる金属系清浄剤である。金属比が1.0未満では内熱機関用潤滑油組成物の動粘度や低温粘度が高くなるため潤滑性や始動性に不具合が生じる可能性があるためである。
より高い摩擦低減効果を得るためには、単独で合成されたものを用いることが好ましい。
金属比は3.2以下であることが好ましく、より好ましくは3.0以下、さらに好ましくは2.8以下、特に好ましくは2.6以下、最も好ましくは2.5以下に調整されてなる金属系清浄剤である。金属比が4.0を超えると摩擦トルクの低減すなわち省燃費性が不十分となる。
また金属比は1.0以上であることが好ましく、より好ましくは1.1以上、さらに好ましくは1.5以上、特に好ましくは1.9以上に、最も好ましくは2.2以上に調整されてなる金属系清浄剤である。金属比が1.0未満では内熱機関用潤滑油組成物の動粘度や低温粘度が高くなるため潤滑性や始動性に不具合が生じる可能性があるためである。
より高い摩擦低減効果を得るためには、単独で合成されたものを用いることが好ましい。
実施例1〜5および比較例1〜5においては、それぞれ以下に示す基油および添加剤を用いて表2に示す組成を有する潤滑油組成物を調製した。基油O−1、O−2、O−3の性状を表1に示す。
(基油)
O−1(基油1):n−パラフィン含有油を水素化分解/水素化異性化した鉱油
O−2(基油2):水素化分解鉱油
O−3(基油3):水素化分解鉱油
(添加剤)
A−1:非分散型PMA系粘度指数向上剤(Mw=36万,PSSI=15,Mw/PSSI=2.4×104)
A−2:非分散型PMA系粘度指数向上剤(Mw=34万,PSSI=9,Mw/PSSI=3.7×104)
a−1:非分散型PMA系粘度指数向上剤(Mw=38万,PSSI=27,Mw/PSSI=1.4×104)
a−2:分散型PMA系粘度指数向上剤(Mw=40万,PSSI=45,Mw/PSSI=0.88×104)
B1:過塩基性カルシウムサリシレートA(金属比2.5、塩基価157mgKOH/g,Ca含有量5.6mass%、アルキル基鎖長20〜28)
B2:過塩基性カルシウムサリシレートC(金属比2.5、塩基価155mgKOH/g,Ca含有量5.6mass%、アルキル基鎖長14〜18)
b−2:過塩基性カルシウムサリシレートC(金属比3.2、塩基価177mgKOH/g,Ca含有量6.3mass%、アルキル基鎖長14〜18)
C−1:MoDTC(アルキル基鎖長C8/C13、Mo含有量10mass%、硫黄量11mass%)
d−1:コハク酸イミド系分散剤(Mw13000、アルキル基鎖長1900、窒素量0.6mass%)
e−1:ZnDTP(アルキル基鎖長C4/C6、二級、Zn量7.8mass%、P量7.2mass%、S量15.0mass%)
f−1:その他添加剤(酸化防止剤、摩耗防止剤、流動点降下剤、消泡剤等)
実施例1〜5および比較例1〜5の各潤滑油組成物について、40℃または100℃における動粘度、粘度指数、100℃または150℃におけるHTHS粘度を測定した。また、省燃費性の測定は動弁系モータリング摩擦トルクを測定した。各物性値、省燃費性の測定は以下の評価方法により行った。得られた結果を表2に示す。
(1)動粘度:ASTM D−445
(2)粘度指数:JIS K 2283−1993
(3)HTHS粘度:ASTM D−4683
(4)動弁系モータリング摩擦試験:直打型4気筒エンジンの動弁系のカムおよびタペット一対の摩擦トルクを測定可能とする装置を用い、油温100℃、回転数350rpmにおける摩擦トルクを測定した。比較例1を基準油としたときのモータリングフリクション改善率を算出した。
Claims (4)
- 100℃における動粘度が1〜5mm2/sである潤滑油基油と、(A)重量平均分子量(Mw)が40万以下でPSSIが20以下の粘度指数向上剤と、(B1)炭素数20以上の直鎖状もしくは分岐鎖状の炭化水素基を有する金属系清浄剤と、(C)摩擦調整剤と、を含有し、150℃におけるHTHS粘度が2.6mPa・s未満であることを特徴とする潤滑油組成物。
- 前記粘度指数向上剤が、重量平均分子量とPSSIの比(Mw/PSSI)が1×104以上である粘度指数向上剤であることを特徴とする、請求項1に記載の潤滑油組成物。
- 前記金属系清浄剤が、アルカリ土類金属サリシレートをアルカリ土類金属炭酸塩で過塩基化した過塩基性アルカリ土類金属サリシレートであることを特徴とする、請求項1または2に記載の潤滑油組成物。
- 前記摩擦調整剤が、有機モリブデン系摩擦調整剤であることを特徴とする、請求項1〜3のいずれか1項に記載の潤滑油組成物。
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