US20230100774A1 - Resin lubrication grease composition - Google Patents
Resin lubrication grease composition Download PDFInfo
- Publication number
- US20230100774A1 US20230100774A1 US17/800,614 US202117800614A US2023100774A1 US 20230100774 A1 US20230100774 A1 US 20230100774A1 US 202117800614 A US202117800614 A US 202117800614A US 2023100774 A1 US2023100774 A1 US 2023100774A1
- Authority
- US
- United States
- Prior art keywords
- grease composition
- resin
- mass
- lubrication
- grease
- 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.)
- Pending
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- 239000004519 grease Substances 0.000 title claims abstract description 71
- 239000000203 mixture Substances 0.000 title claims abstract description 67
- 238000005461 lubrication Methods 0.000 title claims abstract description 35
- 229920005989 resin Polymers 0.000 title description 13
- 239000011347 resin Substances 0.000 title description 13
- 239000007787 solid Substances 0.000 claims abstract description 21
- 239000005078 molybdenum compound Substances 0.000 claims abstract description 16
- 150000002752 molybdenum compounds Chemical class 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000002562 thickening agent Substances 0.000 claims description 27
- 239000002199 base oil Substances 0.000 claims description 24
- 239000002480 mineral oil Substances 0.000 claims description 14
- 239000000344 soap Substances 0.000 claims description 14
- 239000003921 oil Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- -1 alkyl diphenyl ethers Chemical class 0.000 description 12
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 10
- 239000012964 benzotriazole Substances 0.000 description 9
- 239000003112 inhibitor Substances 0.000 description 9
- 230000003068 static effect Effects 0.000 description 9
- 239000000654 additive Substances 0.000 description 8
- 235000010446 mineral oil Nutrition 0.000 description 8
- 229920013639 polyalphaolefin Polymers 0.000 description 8
- FPLIHVCWSXLMPX-UHFFFAOYSA-M lithium 12-hydroxystearate Chemical compound [Li+].CCCCCCC(O)CCCCCCCCCCC([O-])=O FPLIHVCWSXLMPX-UHFFFAOYSA-M 0.000 description 6
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 6
- 229940114072 12-hydroxystearic acid Drugs 0.000 description 5
- 150000001412 amines Chemical class 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 5
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000001993 wax Substances 0.000 description 5
- 159000000007 calcium salts Chemical class 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- PQVSTLUFSYVLTO-UHFFFAOYSA-N ethyl n-ethoxycarbonylcarbamate Chemical compound CCOC(=O)NC(=O)OCC PQVSTLUFSYVLTO-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium hydroxide monohydrate Substances [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 description 3
- 229940040692 lithium hydroxide monohydrate Drugs 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000012170 montan wax Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 150000003460 sulfonic acids Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- DHTAIMJOUCYGOL-UHFFFAOYSA-N 2-ethyl-n-(2-ethylhexyl)-n-[(4-methylbenzotriazol-1-yl)methyl]hexan-1-amine Chemical compound C1=CC=C2N(CN(CC(CC)CCCC)CC(CC)CCCC)N=NC2=C1C DHTAIMJOUCYGOL-UHFFFAOYSA-N 0.000 description 2
- ZIFJZWXEACSTMH-UHFFFAOYSA-N 2h-benzotriazol-4-ylmethanamine Chemical compound NCC1=CC=CC2=C1N=NN2 ZIFJZWXEACSTMH-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N N-phenyl aniline Natural products C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- HGPXWXLYXNVULB-UHFFFAOYSA-M lithium stearate Chemical compound [Li+].CCCCCCCCCCCCCCCCCC([O-])=O HGPXWXLYXNVULB-UHFFFAOYSA-M 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 150000003871 sulfonates Chemical class 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- XMKLTEGSALONPH-UHFFFAOYSA-N 1,2,4,5-tetrazinane-3,6-dione Chemical compound O=C1NNC(=O)NN1 XMKLTEGSALONPH-UHFFFAOYSA-N 0.000 description 1
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 1
- INOGLHRUEYDAHX-UHFFFAOYSA-N 1-chlorobenzotriazole Chemical compound C1=CC=C2N(Cl)N=NC2=C1 INOGLHRUEYDAHX-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
- MICNDFSNPVAQKY-UHFFFAOYSA-N 2-(2h-benzotriazol-4-yl)butanedioic acid Chemical compound OC(=O)CC(C(O)=O)C1=CC=CC2=NNN=C12 MICNDFSNPVAQKY-UHFFFAOYSA-N 0.000 description 1
- KPYHSKSQWKIIHY-UHFFFAOYSA-N 2-ethyl-n-(2-ethylhexyl)-n-[(5-methylbenzotriazol-1-yl)methyl]hexan-1-amine Chemical compound CC1=CC=C2N(CN(CC(CC)CCCC)CC(CC)CCCC)N=NC2=C1 KPYHSKSQWKIIHY-UHFFFAOYSA-N 0.000 description 1
- IBWXIFXUDGADCV-UHFFFAOYSA-N 2h-benzotriazole;silver Chemical compound [Ag].C1=CC=C2NN=NC2=C1 IBWXIFXUDGADCV-UHFFFAOYSA-N 0.000 description 1
- HYBYUKTZOYYYGB-UHFFFAOYSA-N 3-(2h-benzotriazol-4-yl)propane-1,2-diol Chemical compound OCC(O)CC1=CC=CC2=NNN=C12 HYBYUKTZOYYYGB-UHFFFAOYSA-N 0.000 description 1
- ZZLCFHIKESPLTH-UHFFFAOYSA-N 4-Methylbiphenyl Chemical compound C1=CC(C)=CC=C1C1=CC=CC=C1 ZZLCFHIKESPLTH-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
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 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
- 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 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- CJMZLCRLBNZJQR-UHFFFAOYSA-N ethyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate Chemical compound CCOC(=O)C1=C(N)SC=C1C1=CC=C(F)C=C1 CJMZLCRLBNZJQR-UHFFFAOYSA-N 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 235000013872 montan acid ester Nutrition 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 102200082816 rs34868397 Human genes 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical class [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
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- 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
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/02—Mixtures of base-materials and thickeners
-
- 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
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
-
- 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
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
-
- 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
- C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
- C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic 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
- C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
-
- 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
- C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
- C10M117/04—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen containing hydroxy groups
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- 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
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
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- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
-
- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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- 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
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/06—Mixtures of thickeners and additives
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- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
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- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/106—Naphthenic fractions
- C10M2203/1065—Naphthenic fractions used as base material
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/14—Synthetic waxes, e.g. polythene waxes
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- 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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/18—Natural waxes, e.g. ceresin, ozocerite, bees wax, carnauba; Degras
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/106—Carboxylix acids; Neutral salts thereof used as thickening agents
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
- C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
- C10M2207/1225—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic used as thickening agent
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
- C10M2207/1265—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic used as thickening agent
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- 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
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
- C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
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- 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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- 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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/12—Groups 6 or 16
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- 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
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
- C10N2020/02—Viscosity; Viscosity index
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- 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
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- 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
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- 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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
Definitions
- the present invention relates to a resin lubrication grease composition. More specifically, the present invention relates to a resin lubrication grease composition suitable to use for lubrication between resin-made members or between a resin-made member and a member made from another material, for example, a metal-made member.
- Patent Literature 1 describes a lubrication grease composition containing a polyolefin wax. When used for resin lubrication parts, this grease composition can achieve low friction and can meet the demand for improvements in efficiency of components having resin lubrication parts.
- Patent Literature 2 describes a resin lubrication grease composition characterized in that the grease containing a thickener and a base oil is made contain a montan wax. This grease composition is excellent in that the grease composition can reduce the coefficient of static friction of a lubrication part to extend the durability life of the lubrication part.
- an object of the present invention is to provide a resin lubrication grease composition that can increase the coefficient of static friction of a lubrication part, and suppress an increase in the coefficient of dynamic friction associated with the increased coefficient of static friction and maintain the coefficient of dynamic friction at a certain low level, thus suppressing sliding of the lubrication part of a reducer when no assistance is provided by a motor and maintaining a lubrication efficiency when assistance is provided by the motor.
- the present invention is a resin lubrication grease composition characterized in that the resin lubrication grease composition comprises a solid organic molybdenum compound. Specifically, the present invention provides a grease composition as described below.
- the present invention makes it possible to provide a resin lubrication grease composition that can increase the coefficient of static friction of a lubrication part and maintain the coefficient of dynamic friction at a certain low level, thus suppressing sliding of the lubrication part of the reducer when no assistance is provided by a motor and maintaining the lubrication efficiency when assistance is provided by the motor.
- the thickener to be used in the grease composition of the present invention is not particularly limited.
- the thickener includes soap thickeners represented by a Li soap and a Li complex soap, urea thickeners represented by diurea, inorganic thickeners represented by organoclay and silica, and organic thickeners represented by PTFE.
- soap thickeners are preferable. Since soap thickeners themselves have low coefficients of dynamic friction, an excellent lubrication efficiency can be achieved by using a soap thickener.
- Lithium 12-hydroxystearate, lithium stearate, and a Li complex soap are more preferable, and lithium 12-hydroxystearate and a Li complex soap are particularly preferable. Since thickening can be made with a small amount of the thickener by using lithium 12-hydroxystearate and a Li complex soap, an excellent low-temperature operability can be achieved.
- the amount of the thickener in the grease composition of the present invention is preferably 3 to 20% by mass, further preferably 4 to 17% by mass, and particularly preferably 5 to 15% by mass based on the total mass of the composition.
- the amount is preferably 3 to 20% by mass, further preferably 4 to 17% by mass, and particularly preferably 5 to 15% by mass based on the total mass of the composition.
- the base oil to be used in the grease composition of the present invention is not particularly limited.
- mineral oils ester synthetic oils represented by diester and polyolester
- synthesized hydrocarbon oils represented by poly- ⁇ -olefin (“PAO”)
- PAO poly- ⁇ -olefin
- co-oligomer of ethylene and ⁇ -olefin and polybutene
- ether synthetic oils represented by alkyl diphenyl ethers and polypropylene glycol
- silicone oil fluorinated oil, and the like. Two or more of these may be used in combination.
- the electric power steering since the electric power steering has a smaller output than hydraulic power steering, the operation torque of the electric power steering at a low temperature is large, and operation failure sometimes occurs.
- a reducer part when a synthetic oil is contained as the base oil, it is possible to reduce the operation torque at a low temperature.
- a synthesized hydrocarbon oil is preferably contained, and poly ⁇ -olefin is more preferably contained.
- the proportion of the synthetic oil in the base oil is not particularly limited, but the proportion of PAO may be set to preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and further preferably 70 to 100% by mass in order to achieve a favorable low-temperature operability.
- the type of the balance of the base oil is not a matter, but a mineral oil is preferable from the viewpoint of costs.
- the proportion of the mineral oil in the base oil is preferably 0 to 50% by mass, more preferably 0 to 40% by mass (for example, 20 to 40% by mass), and further preferably 0 to 30% by mass.
- the mineral oil any mineral oil can be used.
- the mineral oil includes, for example, refined mineral oils, high viscosity index oils, and dewaxed mineral oils. Dewaxed mineral oils are particularly preferable from the viewpoint of low-temperature operability.
- the kinematic viscosity of the base oil at 40° C. is preferably 20 to 80 mm 2 /s, and more preferably 30 to 70 mm 2 /s, from the viewpoint of low-temperature operability and durability.
- the base oil contain 70 to 100% by mass of PAO having a kinematic viscosity at 40° C. of 15 to 420 mm 2 /s based on the total amount of the base oil.
- the kinematic viscosity at 40° C. of the entire base oil is preferably 30 to 70 mm 2 /s.
- the content of the base oil in the grease composition of the present invention is an amount that is normally used for production of greases, and is, for example, 75 to 95% by mass, and is preferably 83 to 96% by mass, and more preferably 85 to 95% by mass, from the viewpoint of low-temperature operability.
- Organic molybdenum compounds used as additives for greases in general include those which are solid and liquid at ordinary temperature and ordinary pressure. Since a solid organic molybdenum compound keeps the solid state even when blended in grease, the solid organic molybdenum compound can exhibit a different performance from a liquid organic molybdenum compound.
- the solid organic molybdenum compound to be used in the present invention is not particularly limited as long as the solid organic molybdenum compound is solid at ambient temperature (for example, 25° C.).
- the amount of the solid organic molybdenum compound in the composition of the present invention is more than 0.5% by mass and less than 7.5% by mass, and is preferably 1 to 5% by mass, and further preferably 2 to 3% by mass.
- the amount is more than 0.5% by mass, the coefficient of static friction can be significantly increased, making it possible to suppress sliding of lubricated members.
- the amount is less than 7.5% by mass, favorable low-temperature operability and lubrication efficiency of lubricated members can be maintained.
- additives may be added to the grease composition of the present invention as necessary.
- additives include, for example, antioxidants, rust inhibitors, metal corrosion inhibitors, oiliness improvers, anti-wear agents, extreme pressure agents, solid lubricants. and the like.
- the antioxidants include amine-based, phenol-based, quinoline-based, sulfur-based antioxidants, zinc dithiophosphates, and the like, and amine-based antioxidants are preferable.
- the amine-based antioxidants include, for example, phenyl ⁇ -naphthylamine, alkylphenyl a-naphthylamine, alkyl diphenylamine, and the like, and alkyl diphenylamine is particularly more preferable.
- the rust inhibitors include zinc-based, carboxylic acid-based, carboxylate-based, amine-based, and sulfonate-based rust inhibitors, but sulfonic acid salt-based rust inhibitors, particularly Ca sulfonates, are preferable.
- the Ca sulfonates include calcium salts of petroleum sulfonic acid obtained by sulfonation of aromatic hydrocarbon components in lubricant oil distillates, calcium salts of synthetic sulfonic acids such as dinonylnaphthalenesulfonic acid and alkyl benzenesulfonic acids, overbased calcium salts of petroleum sulfonic acids, overbased calcium salts of alkyl aromatic sulfonic acids, and the like, and overbased Ca sulfonate is particularly preferable.
- the metal corrosion inhibitors include thiadiazole-based, benzimidazole-based, and benzotriazole-based metal corrosion inhibitors, but benzotriazole-based metal corrosion inhibitors are preferable.
- the benzotriazole-based inhibitors include 1,2,3-benzotriazole, 1,H-benzotriazole, 4-methyl-1,H-benzotriazole, 4-carboxy-1,H-benzotriazole, sodium tolyltriazole, 5-methyl-1,H-benzotriazole, benzotriazole butyl ether, silver benzotriazole, 5-chloro-1,H-benzotriazole, 1-chloro-benzotriazole, 1-di(C8H17)aminomethyl-benzotriazole, 2,3-dihydroxypropyl-benzotriazole, 1,2-dicarboxyethyl-benzotriazole, (C8H17)aminomethyl-benzotriazole, bis(benzotriazole-1-yl
- the oiliness improvers include fatty acids, fatty acid esters, and phosphoric acid esters.
- the anti-wear agents and the extreme pressure agents include phosphorus-based, sulfur-based, and organic metal-based agents.
- the solid lubricants include oxidized metallic salts, molybdenum disulfide, polytetrafluoroethylene, melamine cyanurate, and graphite.
- the content of these optional additives is, for example, 0.1 to 10% by mass, preferably 0.1 to 5% by mass, and more preferably 0.5 to 3% by mass, based on the total mass of the composition of the present invention.
- the 60-stroke worked penetration of the grease composition of the present invention is preferably 190 to 415, and more preferably 235 to 370, from the viewpoint of oil release, leakage prevention, and low-temperature operability.
- the grease composition of the present invention can be easily produced by mixing the above components and other additives in a desired blending ratio in accordance with a conventional method.
- the grease composition of the present invention is used for lubrication between resin-made members or between a resin-made member and a member made from another material, for example, a metal-made member.
- the grease composition of the present invention can be favorably used for rolling-element bearings, ball screws, reducers of electric power steering devices, support yokes, and/or the like.
- the resin contained in resin-made members is not particularly limited, but a polyamide is preferable from the viewpoint of strength and hardness.
- a solid organic molybdenum compound was blended with the above base grease in the proportion shown in Table 1, and an additional base oil was added such that the proportion of the thickener became the amount shown in Table 1, followed by dispersion using a three roll mill to prepare a test grease composition.
- the consistency of the test grease composition was 325.
- test grease compositions are as follows:
- mass% shown in Table 1 is a value based on the total mass of the grease composition, and the balance is the base oil.
- the worked penetration of the test grease composition means the 60-stroke worked penetration and was measured in accordance with JIS K 2220 7.
Abstract
The present invention provides a grease composition to be used for lubrication between resin-made members or lubrication between a resin-made member and a member made from another material. With respect to the total mass of the composition, more than 0.5 mass % but less than 7.5 mass% of a solid organic molybdenum compound is contained.
Description
- The present invention relates to a resin lubrication grease composition. More specifically, the present invention relates to a resin lubrication grease composition suitable to use for lubrication between resin-made members or between a resin-made member and a member made from another material, for example, a metal-made member.
- Various metal-made members have conventionally been used as automobile components and the like, but these days, resin-made members are increasingly being used instead of metal-made members for the purpose of reducing the weights. For this reason, both resin-made members and metal-made members are currently used. For example, a resin (polyamide)-made worm wheel gear and a steel-made worm gear are used in a reducer part of electric power steering of automobiles.
- As a grease composition to be used for lubrication between resin-made members and between a resin-made member and a metal-made member, Patent Literature 1 describes a lubrication grease composition containing a polyolefin wax. When used for resin lubrication parts, this grease composition can achieve low friction and can meet the demand for improvements in efficiency of components having resin lubrication parts. Patent Literature 2 describes a resin lubrication grease composition characterized in that the grease containing a thickener and a base oil is made contain a montan wax. This grease composition is excellent in that the grease composition can reduce the coefficient of static friction of a lubrication part to extend the durability life of the lubrication part.
- However, in the case where these grease compositions are applied to a reducer part of electric power steering, when the steering wheel is slightly turned while the steering is not assisted by a motor, like during the driving on a highway, for example, the lubrication part of the reducer slides, causing a problem that the steering wheel is displaced from the center in some cases, due to the low coefficient of static friction.
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- Patent Literature 1: Japanese Patent Application Publication No. Hei 9-194867
- Patent Literature 2: Japanese Patent Application Publication No. 2002-371290
- Therefore, an object of the present invention is to provide a resin lubrication grease composition that can increase the coefficient of static friction of a lubrication part, and suppress an increase in the coefficient of dynamic friction associated with the increased coefficient of static friction and maintain the coefficient of dynamic friction at a certain low level, thus suppressing sliding of the lubrication part of a reducer when no assistance is provided by a motor and maintaining a lubrication efficiency when assistance is provided by the motor.
- The present invention is a resin lubrication grease composition characterized in that the resin lubrication grease composition comprises a solid organic molybdenum compound. Specifically, the present invention provides a grease composition as described below.
- [1] A grease composition to be used for lubrication between a resin-made member and a resin-made member or lubrication between a resin-made member and a member made from another material, comprising:
- a solid organic molybdenum compound in an amount of more than 0.5% by mass and less than 7.5% by mass relative to a total mass of the composition.
- [2] The grease composition according to the above [1], wherein
- the content of the solid organic molybdenum compound is 1 to 5% by mass.
- [3] The grease composition according to the above [1] or [2], wherein
- the thickener is a lithium soap thickener.
- [4] The grease composition according to any one of the above [1] to [3], wherein
- a base oil of the grease composition contains at least one compound selected from the group consisting of synthesized hydrocarbon oils and mineral oils.
- [5] The grease composition according to any one of the above [1] to [4], wherein
- the resin-made member to be lubricated is of a polyamide.
- [6] The grease composition according to any one of the above [1] to [5], wherein
- the member made from another material other than the resin-made member to be lubricated is a metal-made member.
- [7] A reducer for an electric power steering, filled with the grease composition according to any one of the above [1] to [6].
- The present invention makes it possible to provide a resin lubrication grease composition that can increase the coefficient of static friction of a lubrication part and maintain the coefficient of dynamic friction at a certain low level, thus suppressing sliding of the lubrication part of the reducer when no assistance is provided by a motor and maintaining the lubrication efficiency when assistance is provided by the motor.
- The thickener to be used in the grease composition of the present invention is not particularly limited. For example, the thickener includes soap thickeners represented by a Li soap and a Li complex soap, urea thickeners represented by diurea, inorganic thickeners represented by organoclay and silica, and organic thickeners represented by PTFE. Among these, soap thickeners are preferable. Since soap thickeners themselves have low coefficients of dynamic friction, an excellent lubrication efficiency can be achieved by using a soap thickener. Lithium 12-hydroxystearate, lithium stearate, and a Li complex soap (for example, a Li complex soap formed from 12-hydroxystearic acid and azelaic acid) are more preferable, and lithium 12-hydroxystearate and a Li complex soap are particularly preferable. Since thickening can be made with a small amount of the thickener by using lithium 12-hydroxystearate and a Li complex soap, an excellent low-temperature operability can be achieved.
- The amount of the thickener in the grease composition of the present invention is preferably 3 to 20% by mass, further preferably 4 to 17% by mass, and particularly preferably 5 to 15% by mass based on the total mass of the composition. By setting the amount to 3% by mass or more, it is possible to achieve a thickener effect sufficient for forming a grease, and to suppress leakage of the grease from lubrication parts. By setting the amount to 20% by mass or less, it is possible to provide the grease composition with a hardness appropriate to flow into lubrication parts.
- The base oil to be used in the grease composition of the present invention is not particularly limited. For example, it is possible to use mineral oils, ester synthetic oils represented by diester and polyolester, synthesized hydrocarbon oils represented by poly-α-olefin (“PAO”), co-oligomer of ethylene and α-olefin, and polybutene, ether synthetic oils represented by alkyl diphenyl ethers and polypropylene glycol, silicone oil, fluorinated oil, and the like. Two or more of these may be used in combination.
- Meanwhile, since the electric power steering has a smaller output than hydraulic power steering, the operation torque of the electric power steering at a low temperature is large, and operation failure sometimes occurs. In the case of using the grease composition of the present invention for a lubrication part of electric power steering, for example, a reducer part, when a synthetic oil is contained as the base oil, it is possible to reduce the operation torque at a low temperature. Particularly, a synthesized hydrocarbon oil is preferably contained, and poly α-olefin is more preferably contained. The proportion of the synthetic oil in the base oil is not particularly limited, but the proportion of PAO may be set to preferably 50 to 100% by mass, more preferably 60 to 100% by mass, and further preferably 70 to 100% by mass in order to achieve a favorable low-temperature operability. In this case, the type of the balance of the base oil is not a matter, but a mineral oil is preferable from the viewpoint of costs. Hence, in the case of using the grease composition of the present invention for a lubrication part of electric power steering, for example, a reducer part, the proportion of the mineral oil in the base oil is preferably 0 to 50% by mass, more preferably 0 to 40% by mass (for example, 20 to 40% by mass), and further preferably 0 to 30% by mass. As the mineral oil, any mineral oil can be used. The mineral oil includes, for example, refined mineral oils, high viscosity index oils, and dewaxed mineral oils. Dewaxed mineral oils are particularly preferable from the viewpoint of low-temperature operability.
- The kinematic viscosity of the base oil at 40° C. is preferably 20 to 80 mm2/s, and more preferably 30 to 70 mm2/s, from the viewpoint of low-temperature operability and durability.
- It is particularly preferable that the base oil contain 70 to 100% by mass of PAO having a kinematic viscosity at 40° C. of 15 to 420 mm2/s based on the total amount of the base oil. This makes it possible to obtain a grease composition particularly excellent in low-temperature operability. In this case, the kinematic viscosity at 40° C. of the entire base oil is preferably 30 to 70 mm2/s.
- The content of the base oil in the grease composition of the present invention is an amount that is normally used for production of greases, and is, for example, 75 to 95% by mass, and is preferably 83 to 96% by mass, and more preferably 85 to 95% by mass, from the viewpoint of low-temperature operability.
- Organic molybdenum compounds used as additives for greases in general include those which are solid and liquid at ordinary temperature and ordinary pressure. Since a solid organic molybdenum compound keeps the solid state even when blended in grease, the solid organic molybdenum compound can exhibit a different performance from a liquid organic molybdenum compound.
- The solid organic molybdenum compound to be used in the present invention is not particularly limited as long as the solid organic molybdenum compound is solid at ambient temperature (for example, 25° C.).
- The amount of the solid organic molybdenum compound in the composition of the present invention is more than 0.5% by mass and less than 7.5% by mass, and is preferably 1 to 5% by mass, and further preferably 2 to 3% by mass. When the amount is more than 0.5% by mass, the coefficient of static friction can be significantly increased, making it possible to suppress sliding of lubricated members. When the amount is less than 7.5% by mass, favorable low-temperature operability and lubrication efficiency of lubricated members can be maintained.
- Various additives may be added to the grease composition of the present invention as necessary. Such additives include, for example, antioxidants, rust inhibitors, metal corrosion inhibitors, oiliness improvers, anti-wear agents, extreme pressure agents, solid lubricants. and the like. Specifically, the antioxidants include amine-based, phenol-based, quinoline-based, sulfur-based antioxidants, zinc dithiophosphates, and the like, and amine-based antioxidants are preferable. The amine-based antioxidants include, for example, phenyl α-naphthylamine, alkylphenyl a-naphthylamine, alkyl diphenylamine, and the like, and alkyl diphenylamine is particularly more preferable.
- The rust inhibitors include zinc-based, carboxylic acid-based, carboxylate-based, amine-based, and sulfonate-based rust inhibitors, but sulfonic acid salt-based rust inhibitors, particularly Ca sulfonates, are preferable. The Ca sulfonates include calcium salts of petroleum sulfonic acid obtained by sulfonation of aromatic hydrocarbon components in lubricant oil distillates, calcium salts of synthetic sulfonic acids such as dinonylnaphthalenesulfonic acid and alkyl benzenesulfonic acids, overbased calcium salts of petroleum sulfonic acids, overbased calcium salts of alkyl aromatic sulfonic acids, and the like, and overbased Ca sulfonate is particularly preferable.
- The metal corrosion inhibitors include thiadiazole-based, benzimidazole-based, and benzotriazole-based metal corrosion inhibitors, but benzotriazole-based metal corrosion inhibitors are preferable. The benzotriazole-based inhibitors include 1,2,3-benzotriazole, 1,H-benzotriazole, 4-methyl-1,H-benzotriazole, 4-carboxy-1,H-benzotriazole, sodium tolyltriazole, 5-methyl-1,H-benzotriazole, benzotriazole butyl ether, silver benzotriazole, 5-chloro-1,H-benzotriazole, 1-chloro-benzotriazole, 1-di(C8H17)aminomethyl-benzotriazole, 2,3-dihydroxypropyl-benzotriazole, 1,2-dicarboxyethyl-benzotriazole, (C8H17)aminomethyl-benzotriazole, bis(benzotriazole-1-yl-methyl) (C8H17)amine, N,N-bis(2-ethylhexyl)-4-methyl-1H-benzotriazole-1-methyl amine, N,N-bis(2-ethylhexyl)-5-methyl-1H-benzotriazole-1-methylamine, and the like, and 1-[N,N-bis(2-ethylhexyl)aminomethyl]-4-methylbenzotriazole is particularly preferable.
- The oiliness improvers include fatty acids, fatty acid esters, and phosphoric acid esters.
- The anti-wear agents and the extreme pressure agents include phosphorus-based, sulfur-based, and organic metal-based agents.
- The solid lubricants include oxidized metallic salts, molybdenum disulfide, polytetrafluoroethylene, melamine cyanurate, and graphite.
- The content of these optional additives is, for example, 0.1 to 10% by mass, preferably 0.1 to 5% by mass, and more preferably 0.5 to 3% by mass, based on the total mass of the composition of the present invention.
- The 60-stroke worked penetration of the grease composition of the present invention is preferably 190 to 415, and more preferably 235 to 370, from the viewpoint of oil release, leakage prevention, and low-temperature operability.
- The grease composition of the present invention can be easily produced by mixing the above components and other additives in a desired blending ratio in accordance with a conventional method.
- The grease composition of the present invention is used for lubrication between resin-made members or between a resin-made member and a member made from another material, for example, a metal-made member. Specifically, the grease composition of the present invention can be favorably used for rolling-element bearings, ball screws, reducers of electric power steering devices, support yokes, and/or the like. The resin contained in resin-made members is not particularly limited, but a polyamide is preferable from the viewpoint of strength and hardness.
- First, 570.0 g of 12-hydroxystearic acid was completely dissolved in 2352.3 g of a base oil at 90° C. In a different container, 77.7 g of lithium hydroxide was completely dissolved in 388.5 g of pure water at 90° C., and both were mixed while the temperature was increased to 220° C., and thereafter the mixture was cooled to 100° C. or less while agitating, and the resultant was used as a base grease (the total amount of the base grease was 3000 g, the amount of the thickener was 19%).
- A solid organic molybdenum compound was blended with the above base grease in the proportion shown in Table 1, and an additional base oil was added such that the proportion of the thickener became the amount shown in Table 1, followed by dispersion using a three roll mill to prepare a test grease composition. The consistency of the test grease composition was 325.
- First, 957.2 g of stearic acid and 151.3 g of lithium hydroxide monohydrate were added to 1891.5 g of the base oil while agitating, and thereafter the mixture was heated to 230° C. Thereafter, the mixture was cooled to 100° C. or less while agitating to obtain a base grease. A solid organic molybdenum compound was blended with the above base grease in the proportion shown in Table 1, and an additional base oil was added such that the proportion of the thickener became the amount shown in Table 1, followed by dispersion using the three roll mill to prepare a test grease composition. The consistency of the test grease composition was 325.
- First, 445.9 g of 12-hydroxystearic acid was added to 1776.0 g of the base oil, and the solution was heated to a temperature (80 to 90° C.) at which the solution was turned into a completely transparent liquid state. To this, what was obtained by adding, heating and dissolving 64.8 g of lithium hydroxide monohydrate into 363.5 g of water in advance was added. Then, saponification reaction of 12-hydroxystearic acid was conducted while vigorously agitating to form a lithium salt of 12-hydroxystearic acid. Next, 507.7 g of the base oil and 139.4 g of azelaic acid were added, followed by continuously agitating to obtain a uniform state. To this, what was obtained by adding, heating, and dissolving 64.8 g of lithium hydroxide monohydrate into 363.5 g of water in advance was added, and saponification reaction of azelaic acid was conducted while vigorously agitating. Next, the processing was advanced to a heating step, where the content was gradually heated to 200° C. Thereafter, the content was cooled to 100° C. or less while agitating to obtain a base grease. A solid organic molybdenum compound was blended with the above base grease in the proportion shown in Table 1, and an additional base oil was added such that the proportion of the thickener became the amount shown in Table 1, followed by dispersion using the three roll mill to prepare a test grease composition. The consistency of the test grease composition was 325.
- The components used to prepare the test grease compositions are as follows:
-
- PAO: Poly-α-olefin, the kinematic viscosity at 40° C.: 56 mm2/s
- Mineral Oil: Naphthene-based mineral oil, the kinematic viscosity at 40° C.: 115 mm2/s
- Note that the kinematic viscosity were measured in accordance with JIS K 2220 23.
-
- Solid organic Mo: MoDTC (Trade name of Molyvan A, produced by R.T.Vanderbilt Company Inc.)
- Polyolefin wax: Polyethylene wax (Trade name: LICOWAX PE190 P, produced by Clariant Chemicals)
- Montan wax: Partially saponified montanic acid ester wax (Trade name: LICOWAX OP FL, produced by Clariant Chemicals)
- Note that mass% shown in Table 1 is a value based on the total mass of the grease composition, and the balance is the base oil.
- The worked penetration of the test grease composition means the 60-stroke worked penetration and was measured in accordance with JIS K 2220 7.
- On the grease compositions of Examples and Comparative Examples, a test as described below was conducted, and the arithmetic means of coefficient of friction after stabilization was measured to evaluate the properties of these. The results are shown in Table 1.
- Coefficient of Static Friction and Coefficient of Dynamic Friction (Bowden test)
-
- Test piece: a resin pin (diameter 5.0 mm, length 15 mm, nylon GF30%)
- Plate (2.0 × 15 × 160 mm, surface roughness Ra=0.2 µm, S45C)
- Sliding velocity: 1 mm/s
- Stroke: 10 mm
- Load: 19.6 N
- Temperature: 25° C.
- Amount of grease applied: 0.2 \-mm thickness
- Determination criteria: coefficient of static friction
- 0.155 or more=o (Passed), less than 0.155=x (Failed)
- Determination criteria: coefficient of dynamic friction
- 0.150 or less=o (Passed), more than 0.150=x (Failed)
-
TABLE 1 Comp. Ex. Ex. Comp. Ex. Ex. Comp. Ex. Ex. Comp. Ex. Ex. Comp. Ex. 1 2 1 2 3 3 4 4 5 6 5 7 6 7 8 8 9 10 11 12 Thickener Type Lithium 12-hydroxystearate Li stearate Li complex soap Lithium 12-hydroxystearate Amount of Thickener mass% 6.5 15 7 6.5 Base oil mixing ratio % PAO 70 70 70 70 70 70 70 100 50 40 70 70 70 70 70 70 Mineral oil 30 30 30 30 30 30 30 0 50 60 30 30 30 30 30 30 Additives mass% Solid organic Mo 0 0.5 1 2 5 7.5 10 2 2 2 0.5 2 20 0.5 2 20 0 0 0 0 Liquid organic Mo 0 0 3 0 0 Polyolefin wax 0 0 0 3 0 Montan wax 0 0 0 0 3 Performa nce Static µ × × ○ ○ ○ ○ ○ ○ ○ ○ × ○ ○ × ○ ○ × × × × Dynamic µ ○ ○ ○ ○ ○ × × ○ ○ ○ ○ ○ × ○ ○ × × ○ ○ ○
Claims (7)
1. A grease composition for use in lubrication between a resin-made member and a resin-made member or lubrication between a resin-made member and a member made from another material, comprising:
a solid organic molybdenum compound in an amount of more than 0.5% by mass and less than 7.5% by mass relative to a total mass of the composition.
2. The grease composition according to claim 1 , wherein the content of the solid organic molybdenum compound is 1 to 5% by mass.
3. The grease composition according to claim 1 , wherein a thickener is a lithium soap thickener.
4. The grease composition according to claim 1 , wherein
a base oil of the grease composition contains at least one compound selected from the group consisting of synthesized hydrocarbon oils and mineral oils.
5. The grease composition according to claim 1 , wherein
the resin-made member to be lubricated is of a polyamide.
6. The grease composition claim 1 , wherein
the member made from another material other than the resin-made member to be lubricated is a metal-made member.
7. A reducer for an electric power steering, filled with the grease composition according to claim 1 .
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JP2020-051409 | 2020-03-23 | ||
JP2020051409A JP7429138B2 (en) | 2020-03-23 | 2020-03-23 | Grease composition for resin lubrication |
PCT/JP2021/011649 WO2021193504A1 (en) | 2020-03-23 | 2021-03-22 | Resin lubrication grease composition |
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US17/800,614 Pending US20230100774A1 (en) | 2020-03-23 | 2021-03-22 | Resin lubrication grease composition |
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US (1) | US20230100774A1 (en) |
EP (1) | EP4098725A4 (en) |
JP (2) | JP7429138B2 (en) |
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JP2022092773A (en) * | 2020-12-11 | 2022-06-23 | Eneos株式会社 | Grease composition and method for lubricating sliding part using the grease composition |
Citations (4)
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US6444621B1 (en) * | 1999-08-27 | 2002-09-03 | Koyodo Yushi Co., Ltd. | Grease composition for steering of motorcars |
JP2004250481A (en) * | 2003-02-18 | 2004-09-09 | Nsk Ltd | Lubricating grease composition for reduction gear and electric power steering apparatus |
US20090065287A1 (en) * | 2005-04-28 | 2009-03-12 | Hirofumi Kuwabara | Rolling device employing lubricating grease composition and electric power steering apparatus employing the rolling device |
US8549945B2 (en) * | 2008-11-12 | 2013-10-08 | Mando Corporation | Reducer of electronic power steering apparatus |
Family Cites Families (13)
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JP2960561B2 (en) * | 1991-02-20 | 1999-10-06 | 協同油脂株式会社 | Grease composition for resin speed reducer |
JPH09194867A (en) | 1996-01-22 | 1997-07-29 | Kyodo Yushi Kk | Lubricating grease composition |
JP4037067B2 (en) | 2001-06-14 | 2008-01-23 | 協同油脂株式会社 | Grease composition for resin lubrication |
JP2005247971A (en) | 2004-03-03 | 2005-09-15 | Nsk Ltd | Grease composition for lubricating resin, gear apparatus and electrically driven power steering apparatus |
JP2006044306A (en) | 2004-07-30 | 2006-02-16 | Nsk Ltd | Electric power steering device |
JP2006194279A (en) * | 2005-01-11 | 2006-07-27 | Jtekt Corp | Reduction gear and electric power steering |
JP4617974B2 (en) | 2005-04-12 | 2011-01-26 | Nok株式会社 | Grease seal |
JP4865380B2 (en) | 2006-03-30 | 2012-02-01 | Jx日鉱日石エネルギー株式会社 | Grease composition |
JP4897330B2 (en) | 2006-03-30 | 2012-03-14 | Jx日鉱日石エネルギー株式会社 | Grease composition |
CN101981169B (en) * | 2008-04-01 | 2015-01-07 | Gkn动力传动***国际有限责任公司 | Grease composition for use in constant velocity joints |
EP3277783B1 (en) | 2015-03-31 | 2018-09-26 | GKN Driveline International GmbH | A grease composition for use in constant velocity joints |
JP7121007B2 (en) * | 2017-07-21 | 2022-08-17 | デュポン・東レ・スペシャルティ・マテリアル株式会社 | GREASE COMPOSITION, SLIDING MEMBER USING THE SAME, AND LOW FREQUENCY NOISE REDUCTION METHOD |
JP6946176B2 (en) | 2017-12-27 | 2021-10-06 | 株式会社アドヴィックス | Power conversion device and electric braking device for vehicles |
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2020
- 2020-03-23 JP JP2020051409A patent/JP7429138B2/en active Active
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2021
- 2021-03-22 US US17/800,614 patent/US20230100774A1/en active Pending
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- 2021-03-22 CN CN202180023428.6A patent/CN115315502A/en active Pending
- 2021-03-22 WO PCT/JP2021/011649 patent/WO2021193504A1/en unknown
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6444621B1 (en) * | 1999-08-27 | 2002-09-03 | Koyodo Yushi Co., Ltd. | Grease composition for steering of motorcars |
JP2004250481A (en) * | 2003-02-18 | 2004-09-09 | Nsk Ltd | Lubricating grease composition for reduction gear and electric power steering apparatus |
US20090065287A1 (en) * | 2005-04-28 | 2009-03-12 | Hirofumi Kuwabara | Rolling device employing lubricating grease composition and electric power steering apparatus employing the rolling device |
US8549945B2 (en) * | 2008-11-12 | 2013-10-08 | Mando Corporation | Reducer of electronic power steering apparatus |
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JP7429138B2 (en) | 2024-02-07 |
JP2024028640A (en) | 2024-03-04 |
KR20220134643A (en) | 2022-10-05 |
CN115315502A (en) | 2022-11-08 |
EP4098725A4 (en) | 2023-07-26 |
WO2021193504A1 (en) | 2021-09-30 |
JP2021147569A (en) | 2021-09-27 |
EP4098725A1 (en) | 2022-12-07 |
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