CA2980989C - Lubricating grease composition of mixed oils, soap and resin - Google Patents
Lubricating grease composition of mixed oils, soap and resin Download PDFInfo
- Publication number
- CA2980989C CA2980989C CA2980989A CA2980989A CA2980989C CA 2980989 C CA2980989 C CA 2980989C CA 2980989 A CA2980989 A CA 2980989A CA 2980989 A CA2980989 A CA 2980989A CA 2980989 C CA2980989 C CA 2980989C
- Authority
- CA
- Canada
- Prior art keywords
- lubricating grease
- grease composition
- thickener
- polyamide resin
- resin member
- 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.)
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- 239000004519 grease Substances 0.000 title claims abstract description 60
- 239000000203 mixture Substances 0.000 title claims abstract description 58
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 52
- 239000000344 soap Substances 0.000 title claims abstract description 43
- 239000003921 oil Substances 0.000 title claims abstract description 26
- 239000011347 resin Substances 0.000 title description 11
- 229920005989 resin Polymers 0.000 title description 11
- 239000002562 thickening agent Substances 0.000 claims abstract description 67
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 47
- 239000002199 base oil Substances 0.000 claims abstract description 34
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 19
- 229910052788 barium Inorganic materials 0.000 claims abstract description 15
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 150000004696 coordination complex Chemical class 0.000 claims abstract description 5
- -1 ethylene- Chemical class 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 17
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 12
- 229930195733 hydrocarbon Natural products 0.000 abstract description 12
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 12
- 230000006866 deterioration Effects 0.000 abstract description 8
- 230000003247 decreasing effect Effects 0.000 abstract description 7
- 230000002401 inhibitory effect Effects 0.000 abstract description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 21
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 13
- 125000004432 carbon atom Chemical group C* 0.000 description 13
- 239000003963 antioxidant agent Substances 0.000 description 9
- 150000001735 carboxylic acids Chemical class 0.000 description 9
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 8
- 239000002253 acid Substances 0.000 description 8
- 239000004202 carbamide Substances 0.000 description 8
- 239000012213 gelatinous substance Substances 0.000 description 8
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 8
- 238000007127 saponification reaction Methods 0.000 description 8
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 8
- 239000000654 additive Substances 0.000 description 7
- 150000002148 esters Chemical class 0.000 description 7
- 229940114072 12-hydroxystearic acid Drugs 0.000 description 6
- 235000014113 dietary fatty acids Nutrition 0.000 description 6
- 229930195729 fatty acid Natural products 0.000 description 6
- 239000000194 fatty acid Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 150000001412 amines Chemical class 0.000 description 5
- 230000003078 antioxidant effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 230000003449 preventive effect Effects 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 4
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 4
- 229910001863 barium hydroxide Inorganic materials 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- JQVDAXLFBXTEQA-UHFFFAOYSA-N dibutylamine Chemical compound CCCCNCCCC JQVDAXLFBXTEQA-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 4
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 150000001536 azelaic acids Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
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- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 3
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 3
- 150000003330 sebacic acids Chemical class 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 description 2
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical compound CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 2
- ZDHCZVWCTKTBRY-UHFFFAOYSA-N 12-hydroxylauric acid Chemical compound OCCCCCCCCCCCC(O)=O ZDHCZVWCTKTBRY-UHFFFAOYSA-N 0.000 description 2
- UGAGPNKCDRTDHP-UHFFFAOYSA-N 16-hydroxyhexadecanoic acid Chemical compound OCCCCCCCCCCCCCCCC(O)=O UGAGPNKCDRTDHP-UHFFFAOYSA-N 0.000 description 2
- HCUZVMHXDRSBKX-UHFFFAOYSA-N 2-decylpropanedioic acid Chemical class CCCCCCCCCCC(C(O)=O)C(O)=O HCUZVMHXDRSBKX-UHFFFAOYSA-N 0.000 description 2
- RZUDZAJRBFRQLS-UHFFFAOYSA-N 2-dodecylpropanedioic acid Chemical class CCCCCCCCCCCCC(C(O)=O)C(O)=O RZUDZAJRBFRQLS-UHFFFAOYSA-N 0.000 description 2
- BTBJCTWMARHHQD-UHFFFAOYSA-N 2-heptadecylpropanedioic acid Chemical class CCCCCCCCCCCCCCCCCC(C(O)=O)C(O)=O BTBJCTWMARHHQD-UHFFFAOYSA-N 0.000 description 2
- MEAHFJBYWLCGDM-UHFFFAOYSA-N 2-pentadecylpropanedioic acid Chemical class CCCCCCCCCCCCCCCC(C(O)=O)C(O)=O MEAHFJBYWLCGDM-UHFFFAOYSA-N 0.000 description 2
- SMTKGALBDOEZCA-UHFFFAOYSA-N 2-tetradecylpropanedioic acid Chemical class CCCCCCCCCCCCCCC(C(O)=O)C(O)=O SMTKGALBDOEZCA-UHFFFAOYSA-N 0.000 description 2
- YGMGJMSLLNODQV-UHFFFAOYSA-N 2-tridecylpropanedioic acid Chemical class CCCCCCCCCCCCCC(C(O)=O)C(O)=O YGMGJMSLLNODQV-UHFFFAOYSA-N 0.000 description 2
- WMRCTEPOPAZMMN-UHFFFAOYSA-N 2-undecylpropanedioic acid Chemical class CCCCCCCCCCCC(C(O)=O)C(O)=O WMRCTEPOPAZMMN-UHFFFAOYSA-N 0.000 description 2
- VVJKKWFAADXIJK-UHFFFAOYSA-N Allylamine Chemical compound NCC=C VVJKKWFAADXIJK-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- MHZGKXUYDGKKIU-UHFFFAOYSA-N Decylamine Chemical compound CCCCCCCCCCN MHZGKXUYDGKKIU-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- WJYIASZWHGOTOU-UHFFFAOYSA-N Heptylamine Chemical compound CCCCCCCN WJYIASZWHGOTOU-UHFFFAOYSA-N 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- OJGMBLNIHDZDGS-UHFFFAOYSA-N N-Ethylaniline Chemical compound CCNC1=CC=CC=C1 OJGMBLNIHDZDGS-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- PLZVEHJLHYMBBY-UHFFFAOYSA-N Tetradecylamine Chemical compound CCCCCCCCCCCCCCN PLZVEHJLHYMBBY-UHFFFAOYSA-N 0.000 description 2
- 235000011037 adipic acid Nutrition 0.000 description 2
- 150000001279 adipic acids Chemical class 0.000 description 2
- 150000001336 alkenes Chemical group 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 2
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 description 2
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- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- OMEMQVZNTDHENJ-UHFFFAOYSA-N n-methyldodecan-1-amine Chemical compound CCCCCCCCCCCCNC OMEMQVZNTDHENJ-UHFFFAOYSA-N 0.000 description 2
- SZEGKVHRCLBFKJ-UHFFFAOYSA-N n-methyloctadecan-1-amine Chemical compound CCCCCCCCCCCCCCCCCCNC SZEGKVHRCLBFKJ-UHFFFAOYSA-N 0.000 description 2
- JACMPVXHEARCBO-UHFFFAOYSA-N n-pentylpentan-1-amine Chemical compound CCCCCNCCCCC JACMPVXHEARCBO-UHFFFAOYSA-N 0.000 description 2
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- 150000003022 phthalic acids Chemical class 0.000 description 2
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- 238000002360 preparation method Methods 0.000 description 2
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- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
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- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical compound C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 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
- 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
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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
- C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
- C10M107/02—Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
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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
- 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
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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
- 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
- C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M117/06—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having more than one carboxyl group bound to an acyclic carbon atom or cycloaliphatic carbon atom
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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
- C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M117/08—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to a carbon atom of a six-membered aromatic ring
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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
-
- 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
- C10M2205/022—Ethene
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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
- C10M2205/028—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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- 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
- 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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- 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
- 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
- C10M2207/1256—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 used as thickening agent
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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
- 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
- C10M2207/127—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 polycarboxylic
- C10M2207/1276—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 polycarboxylic used as thickening agent
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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
- 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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- 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
- C10M2215/065—Phenyl-Naphthyl amines
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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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
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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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/02—Groups 1 or 11
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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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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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
- C10N2030/02—Pour-point; 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
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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
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
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- Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The present invention is to provide a lubricating grease composition capable of inhibiting the deterioration of the polyamide resin member particularly under a high-temperature use environment while maintaining good low-temperature properties, thereby maintaining a breaking elongation at a high level without substantially decreasing it. The lubricating grease composition for a polyamide resin member of the present invention is a lubricating grease composition for a polyamide resin member to be supplied as a lubricant on a surface of at least a sliding portion of the polyamide resin member including the sliding portion with an other member, characterized in that the lubricating grease composition for a polyamide resin member contains a base oil which is a synthetic hydrocarbon oil, and a thickener which is at least one metal complex soap selected from a barium complex soap and a lithium complex soap, wherein a kinetic viscosity at 40°C of the base oil ranges from 30 to 200 mm2/s and a drop point of the thickener is 270°C or more.
Description
LUBRICATING GREASE COMPOSITION OF MIXED OILS, SOAP AND
RESIN
Technical Field (0001) The present invention relates to a lubricating grease composition for a polyamide resin member to be supplied as a lubricant on the surface of at least a sliding portion of a polyamide resin member including the sliding portion where, for example, the other member comprising a resin member or a metal material slides or which slides on the other member.
Background Art
RESIN
Technical Field (0001) The present invention relates to a lubricating grease composition for a polyamide resin member to be supplied as a lubricant on the surface of at least a sliding portion of a polyamide resin member including the sliding portion where, for example, the other member comprising a resin member or a metal material slides or which slides on the other member.
Background Art
(0002) Heretofore, greases have been used as lubricant compositions in various industrial fields such as steels, automobiles, general machineries, and precision instruments. In recent years, polyamide resins have been commonly used as the member for sliding portions, and the like, of automobile parts, and the like, for the purpose of improving heat resistance in light of being used under a high-temperature environment in addition to weight saving and cost saving.
[0003] The lubricating grease used at the sliding portion of the polyamide resin member is needed to have a property which does not cause the deterioration (embrittlement) of the polyamide resin member in addition to lubricity, low-temperature performance and heat resistance. However, when a lithium soap grease or a urea grease commonly used is used as the lubricating grease for a polyamide resin member, attacking properties against the polyamide resin member used under a high-temperature (e.g., 150 C) environment are expressed and deteriorate the polyamide resin member, resulting in tending to cause a problem of ruining the performance of machine parts made of the - I -polyamide resin. Specifically, the lithium soap grease tends to be oxidized and deteriorate the polyamide resin member, and the urea grease itself has high heat resistance but when the resin is immersed under high-temperature environment as described above, a part of the amine in urea is eliminated and the eliminated amine expresses attacking properties against the polyamide resin member, resulting in tending to deteriorate the polyamide resin.
[0004] For example, Patent Literature 1 describes a lubricant composition, for the purpose of inhibiting the deterioration of the polyamide resin member under a high-temperature (140 C in Examples) environment, containing a synthetic hydrocarbon oil, a urea-based thickener and zinc stearate and further at least one compound selected from the group consisting of trimellitic acid esters, aromatic sulfonamides, phthalic acid esters and hindered phenols.
[0005] However, as described above, the lubricant composition containing the urea-based thickener described in Patent Literature 1 expresses attacking properties against the polyamide resin member under a high-temperature environment and deteriorates the polyamide resin member, resulting in pose of a problem of decreasing the performance of machine parts made of the polyamide resin, particularly a breaking elongation.
Document List Patent Literature
Document List Patent Literature
[0006]
Patent Literature 1: Japanese Patent Application Publication No. 2012-102191 Summary of Invention Technical Problem
Patent Literature 1: Japanese Patent Application Publication No. 2012-102191 Summary of Invention Technical Problem
[0007] Thus, it is an object of the present invention to provide a lubricating grease composition for a polyamide resin member capable of inhibiting the deterioration of the polyamide resin member particularly under a high-temperature use environment while having good low-temperature properties by suitably adjusting a base oil and a thickener, thereby maintaining a breaking elongation at a high level without substantially decreasing it.
Solution to Problem
Solution to Problem
[0008] For solving the above problems, the summary and construction of the present invention are as follows.
[0009] (1) A lubricating grease composition for a polyamide resin member to be supplied as a lubricant on a surface of at least a sliding portion of the polyamide resin member including the sliding portion with an other member, characterized in that the lubricating grease composition for a polyamide resin member comprises a base oil which is a synthetic hydrocarbon oil, and a thickener which is at least one metal complex soap selected from a barium complex soap and a lithium complex soap, wherein a kinetic viscosity at 40 C
of the base oil ranges from 30 to 200 mm2/s, and a drop point of the thickener is 270 C or more.
of the base oil ranges from 30 to 200 mm2/s, and a drop point of the thickener is 270 C or more.
[0010] (2) The lubricating grease composition for a polyamide resin member according to the above (1), wherein the base oil is a single oil of a poly-a-olefin or a mixed oil of the poly-a-olefin and an ethylene-a-olefin copolymer.
[0011] (3) The lubricating grease composition for a polyamide resin member according to the above (1) or (2), wherein the other member is a metal member.
Effects of Invention
Effects of Invention
[0012] The present invention thus enables the provision of the lubricating grease composition for a polyamide resin member capable of inhibiting the deterioration of the polyamide resin member particularly under a high-temperature use environment while having good low-temperature properties, thereby maintaining a breaking elongation at a high level without substantially decreasing it by containing a base oil which is a synthetic hydrocarbon oil and a thickener which is at least one metal complex soap selected from a barium complex soap and a lithium complex soap, wherein a kinetic viscosity at 40 C
of the base oil ranges from 30 to 200 mm2/s and a drop point of the thickener is or more.
Description of Embodiments
of the base oil ranges from 30 to 200 mm2/s and a drop point of the thickener is or more.
Description of Embodiments
[0013] Next, embodiments of the present invention are described below.
[0014] The lubricating grease composition for a polyamide resin member according to the present invention is to be supplied as a lubricant on the surface of at least a sliding portion of the polyamide resin member including the sliding portion with other member and has both good low-temperature properties and outstanding mechanical properties (particularly a breaking elongation) particularly under a high-temperature use environment
[0015] Examples of the other members include resin materials and metal materials. The resin material may be resin materials having art identical composition to or a different composition from the polyamide resin member.
Note that the lubricating grease composition of the present invention, when the other member is metal members, is preferable in term of rendering particularly remarkable effects for the use as a lubricant on the surface of the polyamide resin member.
Note that the lubricating grease composition of the present invention, when the other member is metal members, is preferable in term of rendering particularly remarkable effects for the use as a lubricant on the surface of the polyamide resin member.
[0016] The "high-temperature (use) environment" herein refers to an environment wherein an ambient temperature ranges from 130 to 150 C.
[0017] The lubricating grease composition of the present invention contains a base oil and a thickener.
=
=
[0018] (Base oil) =
In the present invention, the base oil is a synthetic hydrocarbon oil, arid the kinetic viscosity at 40 C of the base oil must range from 30 to 200 mm2/s.
This is because when a kinetic viscosity at 40 C of the synthetic hydrocarbon oil is lower than 30 mrn2/s, the deterioration of the polyamide resin member facilitates, whereas when such a viscosity is higher than 200 mm2/s, a torque at a low temperature (low-temperature torque) increases. Note that the base oil, when, for example, an ester-based synthetic oil or an ether-based synthetic oil is used other than the synthetic hydrocarbon oil, may adversely affect the resin members, and it is thus preferable that the base oil be constituted only by the synthetic hydrocarbon oil. Examples of the synthetic hydrocarbon oil include poly-a-olefins, ethylene-a-olefin copolymers and polybutene. Specific examples of the particularly preferable base oil constituted by the synthetic hydrocarbon oil include when the base oil is a single oil of a poly-a-olefin or when the base oil is a mixed oil of a poly-a-olefin and an ethylene-a-olefin copolymer.
In the present invention, the base oil is a synthetic hydrocarbon oil, arid the kinetic viscosity at 40 C of the base oil must range from 30 to 200 mm2/s.
This is because when a kinetic viscosity at 40 C of the synthetic hydrocarbon oil is lower than 30 mrn2/s, the deterioration of the polyamide resin member facilitates, whereas when such a viscosity is higher than 200 mm2/s, a torque at a low temperature (low-temperature torque) increases. Note that the base oil, when, for example, an ester-based synthetic oil or an ether-based synthetic oil is used other than the synthetic hydrocarbon oil, may adversely affect the resin members, and it is thus preferable that the base oil be constituted only by the synthetic hydrocarbon oil. Examples of the synthetic hydrocarbon oil include poly-a-olefins, ethylene-a-olefin copolymers and polybutene. Specific examples of the particularly preferable base oil constituted by the synthetic hydrocarbon oil include when the base oil is a single oil of a poly-a-olefin or when the base oil is a mixed oil of a poly-a-olefin and an ethylene-a-olefin copolymer.
[0019] In the present invention, the poly-a-olefin refers to a polymer obtained by homopolymerizing or copolymerizing monomers comprising one or two or more of a-olefins having three or more carbon atoms.
[0020] The a-olefin herein is not particularly limited but examples thereof include linear terminal olefins having preferably 3 to 30 carbon atoms, more preferably 4 to 20 carbon atoms, further preferably 6 to 16 carbon atoms. More specifically, propylene, 1-butene, 1-pentene, 1-hexene, and the like, are included.
[00211 It is preferable that the poly-a-olefin have a mixing ratio ranging from 67 to 91 mass% to the entire lubricating grease composition. Additionally, when the synthetic hydrocarbon oil is the mixed oil of the poly-a-olefin and an ethylene-a-olefin copolymer, it is preferable that the poly-a-olefin have a mixing ratio ranging from 69 to 86 mass% to the entire lubricating grease composition.
[0022] Note that the degree of polymerization of poly-a-olefin is not particularly limited and includes those usually termed the oligomers.
Additionally, one of the poly-a-olefins may be used singly or two or more thereof may be used in mixutre.
[0023] In the present invention, the ethylene-a-olefin copolymer refers to a copolymer comprising, as the constituent monomers, ethylene and one or two or more of a-olefins having three or more carbon atoms.
[0024] The a-olefin in the ethylene-a-olefin copolymer herein is not particularly limited but examples thereof include linear terminal olefins having preferably 3 to 30 carbon atoms, more preferably 4 to 20 carbon atoms, further preferably 6 to 16 carbon atoms. More specifically, propylene, 1-butene, 1-pentene, 1-hexene, and the like, are included. Note that one of the poly-a-olefins may be used singly or two or more thereof may be used. Note that the ethylene-.
a-olefin copolymer may have any of the structures of random copolymer, alternating copolymer, periodic copolymer or block copolymer.
[0025] The number average molecular weight of the ethylene-a-olefin copolymer ranges from 40,000 to 200,000, and the weight average molecular weight of the ethylene-ix-olefin copolymer ranges from 40,000 to 200,000.
[0026] When the synthetic hydrocarbon oil is the mixed oil of the poly-a-olefin and the ethylene-a-olefin copolymer, it is preferable that the ethylene-a-olefin copolymer have a mixing ratio ranging from 1.5 to 3.5 mass% to the entire lubricating grease composition. When a mixing ratio of the ethylene-a-olefin copolymer is less than 1.5 mass%, the base oil viscosity may not be increased to a desirable numerical value within the suitable range, whereas such the viscosity is more than 3.5 mass%, the base oil viscosity may be much higher than the suitable range.
[0027J (Thickener) In the lubricating grease composition of the present invention, the thickener must be limited to at least one metal complex soap selected from a lithium complex soap and a barium complex soap in light of being highly heat resistant and not deteriorating the polyamide resin. Further, the drop point of the thickener must be limited to be 270 C or more in light of inhibiting the deterioration of the polyamide resin member under a high-temperature environment (during high-temperature endurance) of the lubricating grease composition and maintaining a high breaking elongation to the polyamide resin member. When a drop point of the thickener is less than 270 C, the lubricating grease composition may attack and deteriorate the polyamide resin member during high-temperature endurance.
[0028] The lithium complex soap herein refers to a soap obtained by saponifying a plurality of carboxylic acids or esters with a lithium hydroxide.
Additionally, the barium complex soap herein refers to a soap obtained by saponifying a plurality of carboxylic acids or esters with a barium hydroxide.
[0029] Specific examples of the lithium complex soap or the barium complex soap include those obtained by reacting fatty acids such as stearic acid, oleic acid, palmitic acid, and/or hydroxy fatty acids having 12 to 24 carbon atoms including one or more hydroxyl groups in a molecule and at least one selected from the group consisting of aromatic carboxylic acids, aliphatic dicarboxylic acids having 2 to 20 carbon atoms (more preferably 4 to 12 carbon atoms) and carboxylic acid monoarnides with, for example, a lithium compound such as lithium hydroxide, or a barium compound such as barium hydroxide.
[0030] The above hydroxy fatty acid having 12 to 24 carbon atoms is not particularly limited and examples thereof include 12-hydroxystearic acid, 12-hydroxylauric acid, 16-hydroxypalmitic acid, with 12-hydroxystearic acid being particularly preferable among these, [0031] Examples of the aromatic carboxylic acid include benzoic acids, phthalic acids, isophthalic acids, terephthalic acids, trimellitic acids, pyromellitic acids, salicylic acids, p-hydroxybenzoic acids, and the like.
[0032] Further, the above aliphatic dicarboxylic acid having 2 to 20 carbon atoms is not particularly limited and examples thereof include oxalic acids, malonic acids, succinic acids, methylsuccinic acids, glutaric acids, adipic acids, pimelic acids, suberic acids, azelaic acids, sebacic acids, nonamethylenedicarboxylic adds, decamethylenedicarboxylic acids, undecanedicarboxylic acids, dodecanedicarboxylic acids, tridecanedicarboxylic acids, tetradecanedicarboxylic acids, pentadecanedicarboxylic acids, hexadecanedicarboxylic acids, hep tadecaned icarboxylic acids, octadecanedicarboxylic acids, and the like, with adipic acids, pimelic acids, suberic acids, azelaic acids, sebacic acids, nonamethylenedicarboxylic acids, decarnethylenedicarboxylic acids, undecanedicarboxylic acids, dodecanedicarboxylic acids, tridecanedi carboxylic acids, tetradecanedicarboxylic adds, pentadecanedicarboxylic acids, hexadecanedicarboxyli c acids, heptadecanedicarboxylic acids, octadecanedicarboxylic acids, and the like, being preferably used. Of these, azelaic acids and sebacic acids are preferable.
[0033] Further, examples of the carboxylic acid monoarnide include those in which one of the carboxyl groups of the above dicarboxylic acid is amidated.
Preferable examples include those in which one of the carboxyl groups of azelaic acid or sebacic acid is amidated.
[0034] Examples of the amine to be amidated include aliphatic primary amines such as butylamine, amylamine, hexylamirte, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristyl amine, palmityl amine, stearyl amine, and behenyl amine, aliphatic secondary amines such as dipropylamine, diisopropylamine, dibutylamine, diamylamine, dilaurylamine, monomethyl laurylamine, distearylamine, monomethyl stearylamine, dimyristylarnine, and dipalmitylamine, aliphatic unsaturated amines such as allylamine, diallylarnine, oleylamine, and dioleyIarnine, alicyclic amines such as cydopropylarnine, cyclobutylamine, cyclopentylamine, and cyclohexylamine, aromatic amines such as aniline, methylaniline, ethylaniline, benzylamine, dibenzylarnine, diphenylamine, and a-naphthylamine, with hexylamine, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristyl amine, palmityl amine, stearylamine, behenyl amine, dibutylamine, diamylamine, monomethyl laurylamine, monomethyl stearylamine, oleylamine, and the like, being preferably used, [0035] When the lithium complex soap or the barium complex soap is mixed, carboxylic acids and/or esters thereof and the above metal hydroxide may be fed to the base oil and saponified in the base oil to be mixed.
[0036] When the lithium complex soap or the barium complex soap is prepared by carrying out the saponification reaction in the base oil, it is preferable to use the combination of stearic acid and/or 12-hydroxystearic acid as the carboxylic acid and azelaic acid or sebacic acid and the like.
[0037] Note that when the saponification reaction is carried out in the base oil, a plurality of carboxylic acids and/or esters thereof and acid amide may be saponified simultaneously or may be saponified sequentially.
[00381 When the thickener is the lithium complex soap, the mixing ratio to the entire lubricating grease composition is preferably 8 to 18 mass%. When a mixing amount is less than 8 mass%, the degree of oil separation may increase likely decreasing the storage stability of the lubricating grease composition, whereas when such an amount is higher than 18 mass%, the low-temperature torque at a low temperature may increase.
[0039] When the thickener is the barium complex soap, the mixing ratio to the entire lubricating grease composition is preferably 27 to 33 mass%. When a mixing amount is less than 27 mass%, the degree of oil separation may increase likely decreasing the storage stability of the lubricating ,grease composition, whereas when such an amount is higher than 33 mass%, the low-temperature torque at a low temperature may decrease.
[0040] (Others) To the grease composition, other additives such as an antioxidant, a rust preventive, an extreme pressure agent, an oily agent, and a viscosity index improver, which have been added to the greases can be added as necessary in a = range within which the effects of the present invention are not affected.
[0041] Examples of the antioxidant include phenol-based antioxidants such as 2,6-ditertiary butyl-4-methylphenol and 4,4'-methylenebis(2,6-ditertiary butylphenol), amine-based antioxidants such as alkyl diphenylamine, = triphenylamine, phenyl-a-naphthylamine, phenothiazine, alkylated phenyl-a-naphthylarnine, and alkylated phenythiazine. Additionally, phosphorus-based antioxidants and sulfur-based antioxidants are also used.
[0042] Examples of the rust preventive include Ca salts or Na salts of aromatic sulfonic acids or saturated aliphatic dicarboxylic acids, fatty acids, fatty acid amines, alkylsulforlic acid metal salts, alkylsulfonic acid amine salts, oxidized paraffins, polyoxyalkyl ethers, and the like.
[0043] Examples of the extreme pressure agent include phosphorus-based compounds such as phosphate esters, phosphite esters, and phosphate ester amines, sulfur-based compounds such as sulfides, and disulfides, sulfur-based compound metal salts such as dialkyldithiophosphoric acid metal salts (excluding zinc salts) and dialkyldithiocarbamic acid metal salts, chlorine-based compounds such as chlorinated paraffins and chlorinated diphenyls, and organometallic compounds such as molybdenum dialkyldithiocarbamates (MoDTP), and the like.
[0044] Examples of the oily agent include fatty acids or esters thereof, higher alcohols, polyhydric alcohols or esters thereof, aliphatic esters, aliphatic amines, aliphatic monoglycerides, montan waxes, amide-based waxes, and the like.
100451 Examples of the viscosity index improver include polymethacrylates, ethylene-propylene copolymers, polyisobutylenes, polyalkylstyrenes, styrene-isoprene hydrogenated copolymers, and the like.
100461 The composition is prepared by a method wherein each of the above components are added in a predetermined amount and thoroughly kneaded using a triple roll or a high-pressure homogenizer.
Example [0047] Hereinafter, the present invention is described in further detail in reference with Examples but not limited to these Examples, [0048] (Examples 1 to 7 and Comparative Examples 1 to 6) (1) Preparation method of lubricating grease compositions = The preparation method of lubricating grease compositions was carried out by the following method.
(1-1) Case in which the lithium complex soap (Li-Comp) was used as the thickener First, the base oil and 12-hydroxystearic acid (thickener component) and lithium hydroxide (thickener component) were mixed in predetermined amounts in a mixing and stirring tank and stirred with heating at about 80 to 130 C to carry out the saponification reaction. Further, azelaic acid (thickener component) was mixed in a predetermined amount and stirred with heating at about 80 to 200 C, to which lithium hydroxide (thickener component) was further added to carry out the saponification reaction, followed by cooling to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 1 and Table 2. The saponification reaction was carried out for hour or more for the lubricating grease composition with which thickener A was mixed and less than 30 minutes. for the lubricating grease composition with which thickener E was mixed. Note that the amount of each component constituting the thickeners A, E mixed was, in both thickeners, 63.5 mass% of hydroxystearic acid, 19 mass% of azelaic acid and 17.5 mass% of lithium hydroxide, to the total amount of the thickener.
[0049] (1-2) Case in which the barium complex soap (13a-Comp) was used as the thickener First, the base oil and sebacic acid (thickener component) and carboxylic acid monostearyl amide (thickener component) were mixed in predetermined amounts in a mixing and stirring tank and stirred with heating at about 80 to 200 C, to which barium hydroxide (thickener component) was added to carry out the saponification reaction, followed by cooling to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 1 and Table 2. The saponification reaction was carried out for minutes or more for the lubricating grease composition with which thickener B
was mixed and less than 15 minutes for the lubricating grease composition with which thickener F was mixed. Note that the amount of each component constituting the thickeners B, F mixed was, in both thickeners, 27.5 mass% of sebacic acid, 41.5 mass% of carboxylic acid monostearyl amide and 31 mass% of barium hydroxide, to the total amount of the thickener.
[0050] (1-3) Case in which the lithium soap (Li-OHST) was used as the thickener First, the base oil and 12-hydroxystearic acid (thickener component) and lithium hydroxide (thickener component) were mixed in predetermined amounts in a mixing and stirring tank and stirred with heating at about 80 to 130 C to carry out the saponification reaction. The mixture was further stirred with heating to a melting temperature and subsequently cooled to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 2. Note that the amount of each component constituting the thickener C mixed was 88 mass% of 12-hydroxystearic acid and 12 mass% of lithium hydroxide, to the total amount of the thickener.
[0051] (1-4) Case in which Urea was used as the thickener First, the base oil and diphenylmethane diisotyanate (thickener component) and octylamine (thickener component) were stirred with heating at 70 to 180 C to carry out the reaction, and the temperature was elevated and cooled to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 2. Note that the amount of each component constituting the thickeners D mixed was 50 mass% of diphenylmethane diisocyanate and 50 mass% of octylarnine, to the total amount of the thickener.
[00521 Poly-cc-olefin A: 40 C kinetic viscosity 30 mm2/s (a product of INEOS
Oligomers Japan DURASYNTm 166) Poly-a-olefin13; 40 C kinetic viscosity 46 mrrizis (a product of INEOS
Oligomers Japan DURASYNThl 168) Poly-a-olefin C: 40 C kinetic viscosity 5 mm2/s (a product of INEOS
Oligomers Japan DURASYNTM 162) Poly-a-olefin D: 40 C kinetic viscosity 400 mm2/s (a product of INEOS
Oligomers Japan DURASYNTm 174) Ethylene-a-olefin copolymer: number average molecular weight 68000, weight average molecular weight 147000 (a product of SHOWA VARNISH CO., LTD. L6Z-25) Thickener A: Li-Comp having a drop point at 280 C (lithium complex soap) Thickener B: Ba-Comp having a drop point at 270 C (barium complex soap) Thickener C: Li-OHST having a drop point at 200 C (lithium soap) Thickener D: Urea having a drop point at 270 C (urea) Thickener E: Li-Comp having a drop point at 255 C (lithium complex soap) Thickener F: Ba-Comp having a drop point at 230 C (barium complex soap) Antioxidant: Phenylnaphthylamine (a product of SANYO CHEMICAL
INDUSVRIES, Ltd. VANLUBETm 81) Rust preventive: neutral calcium sulfonate (a product of KING
Industries, Inc., NA SULTM CA 1089) [0053] (2) Evaluation method (2-1) Base oil viscosity The base oil viscosity was measured in accordance with JIS 1(2283: 2000.
[0054] (2-2) Worked penetration The worked penetration was measured in accordance with JIS K2220.
7: 2013.
[0055] (2-3) Drop point The drop point was measured in accordance with JIS 1<2220. 8: 2013.
[0056] (2-4) Low-temperature property (low-temperature torque) In accordance with JIS 1(2220. 18: 2013, the maximum torque (starting torque) at -40 C obtained at the run-up time was measured. In the present invention, a numerical value (index) of the starting torque of 27 or less was defined as the passing level, whereas such a value of more than 27 was defined as failure.
[0057] (2-5) Compatibility of the resin with the grease composition under a high temperature use environment (breaking elongation) The grease was applied in a thickness of about 1 mm to the surface of Nylon 66 (registered trademark) as a test specimen prescribed in )IS K7162:
1994, the test specimen was allowed to stand in a thermostat at 150 C for 500 hours, subsequently the lubricant was wiped off, and the tensile test prescribed in JIS
K7162 (Plastics - Determination of Tensile Properties - Part 1: General principles) was carried out to measure a breaking elongation. In the present invention, a breaking elongation of 30% or more was defined as the passing level, whereas such an elongation of less than 30% was defined as failure.
[0058] (3) Evaluation results The evaluation results on the low-temperature properties (low-temperature torque) and the high-temperature properties (breaking elongation) =
when each of the lubricating grease compositions was applied to the polyamide resin member are shown in Table 1 and Table 2.
[0059] [Table 11 Example No. 1 , 2 3 4 .5 6 7 Poly-cu-olefin A 84.4 ¨ 84,9 ¨ 67.4 69.4 90,4 Base oil Poly-a-olefin B ¨ 82.4 ¨ 85.6 ¨ ¨
Ethylene-a-olefin copolymer ¨ ¨ 1.5 2.8 ¨ 2 Thickener A. . 15 17 13 11 ¨ ¨ 9 =
Thickener Thickener B ¨ ¨ ¨ ¨ 32 28 ¨
Antioxidant 0.5 0,5 0.5 0.5 0.5 0.5 0.5 Other additives Rust preventive 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Total (mass%) 100 100 100 100 100 100 100 Base oil 40 C kinetic viscosity (rnm2is) 30 46 100 200 30 46 Worked penetration of lubricating grease 265 255 275 290 275 Drop point of thickener ( C) 280 280 275 280 270 270 280 Low-temperature property: -40 C
starting torque Performance Resin compatibility: breaking elongation (%) [0060] [Table 2]
Comparative Example No. 1 2 3 4 5 6 =
Poly-a-olefin A 84.4 69.4 88.4 86.4 ¨
Base oil Poly-a-olefin C ¨ ¨ 84.4 ¨
Poly-a-olefin D ¨ 84.4 Thickener A 15 15 Thickener B ¨ ¨
Thickener C
Thickener Thickener D
Thickener E 15 Thickener F 30 ¨
Antioxidant 0.5 0.5 0.5 0.5 0.5 0.5 Other additives Rust preventive 0.1 0.1 0.1 0.1 0.1 0.1 Total (mass%) 100 100 100 100 100 100 Base oil 40 C kinetic viscosity (mm2/s) 30 30 30 30 5 4.01 Worked penetration of lubricating grease 280 260 270 285 275 Drop point of thickener ( C) DI 230 2.124 270 280 280 Low-temperature property: -40 C
15 24 14 16 12 4.
starting torque Performance Resin compatibility: breaking
[00211 It is preferable that the poly-a-olefin have a mixing ratio ranging from 67 to 91 mass% to the entire lubricating grease composition. Additionally, when the synthetic hydrocarbon oil is the mixed oil of the poly-a-olefin and an ethylene-a-olefin copolymer, it is preferable that the poly-a-olefin have a mixing ratio ranging from 69 to 86 mass% to the entire lubricating grease composition.
[0022] Note that the degree of polymerization of poly-a-olefin is not particularly limited and includes those usually termed the oligomers.
Additionally, one of the poly-a-olefins may be used singly or two or more thereof may be used in mixutre.
[0023] In the present invention, the ethylene-a-olefin copolymer refers to a copolymer comprising, as the constituent monomers, ethylene and one or two or more of a-olefins having three or more carbon atoms.
[0024] The a-olefin in the ethylene-a-olefin copolymer herein is not particularly limited but examples thereof include linear terminal olefins having preferably 3 to 30 carbon atoms, more preferably 4 to 20 carbon atoms, further preferably 6 to 16 carbon atoms. More specifically, propylene, 1-butene, 1-pentene, 1-hexene, and the like, are included. Note that one of the poly-a-olefins may be used singly or two or more thereof may be used. Note that the ethylene-.
a-olefin copolymer may have any of the structures of random copolymer, alternating copolymer, periodic copolymer or block copolymer.
[0025] The number average molecular weight of the ethylene-a-olefin copolymer ranges from 40,000 to 200,000, and the weight average molecular weight of the ethylene-ix-olefin copolymer ranges from 40,000 to 200,000.
[0026] When the synthetic hydrocarbon oil is the mixed oil of the poly-a-olefin and the ethylene-a-olefin copolymer, it is preferable that the ethylene-a-olefin copolymer have a mixing ratio ranging from 1.5 to 3.5 mass% to the entire lubricating grease composition. When a mixing ratio of the ethylene-a-olefin copolymer is less than 1.5 mass%, the base oil viscosity may not be increased to a desirable numerical value within the suitable range, whereas such the viscosity is more than 3.5 mass%, the base oil viscosity may be much higher than the suitable range.
[0027J (Thickener) In the lubricating grease composition of the present invention, the thickener must be limited to at least one metal complex soap selected from a lithium complex soap and a barium complex soap in light of being highly heat resistant and not deteriorating the polyamide resin. Further, the drop point of the thickener must be limited to be 270 C or more in light of inhibiting the deterioration of the polyamide resin member under a high-temperature environment (during high-temperature endurance) of the lubricating grease composition and maintaining a high breaking elongation to the polyamide resin member. When a drop point of the thickener is less than 270 C, the lubricating grease composition may attack and deteriorate the polyamide resin member during high-temperature endurance.
[0028] The lithium complex soap herein refers to a soap obtained by saponifying a plurality of carboxylic acids or esters with a lithium hydroxide.
Additionally, the barium complex soap herein refers to a soap obtained by saponifying a plurality of carboxylic acids or esters with a barium hydroxide.
[0029] Specific examples of the lithium complex soap or the barium complex soap include those obtained by reacting fatty acids such as stearic acid, oleic acid, palmitic acid, and/or hydroxy fatty acids having 12 to 24 carbon atoms including one or more hydroxyl groups in a molecule and at least one selected from the group consisting of aromatic carboxylic acids, aliphatic dicarboxylic acids having 2 to 20 carbon atoms (more preferably 4 to 12 carbon atoms) and carboxylic acid monoarnides with, for example, a lithium compound such as lithium hydroxide, or a barium compound such as barium hydroxide.
[0030] The above hydroxy fatty acid having 12 to 24 carbon atoms is not particularly limited and examples thereof include 12-hydroxystearic acid, 12-hydroxylauric acid, 16-hydroxypalmitic acid, with 12-hydroxystearic acid being particularly preferable among these, [0031] Examples of the aromatic carboxylic acid include benzoic acids, phthalic acids, isophthalic acids, terephthalic acids, trimellitic acids, pyromellitic acids, salicylic acids, p-hydroxybenzoic acids, and the like.
[0032] Further, the above aliphatic dicarboxylic acid having 2 to 20 carbon atoms is not particularly limited and examples thereof include oxalic acids, malonic acids, succinic acids, methylsuccinic acids, glutaric acids, adipic acids, pimelic acids, suberic acids, azelaic acids, sebacic acids, nonamethylenedicarboxylic adds, decamethylenedicarboxylic acids, undecanedicarboxylic acids, dodecanedicarboxylic acids, tridecanedicarboxylic acids, tetradecanedicarboxylic acids, pentadecanedicarboxylic acids, hexadecanedicarboxylic acids, hep tadecaned icarboxylic acids, octadecanedicarboxylic acids, and the like, with adipic acids, pimelic acids, suberic acids, azelaic acids, sebacic acids, nonamethylenedicarboxylic acids, decarnethylenedicarboxylic acids, undecanedicarboxylic acids, dodecanedicarboxylic acids, tridecanedi carboxylic acids, tetradecanedicarboxylic adds, pentadecanedicarboxylic acids, hexadecanedicarboxyli c acids, heptadecanedicarboxylic acids, octadecanedicarboxylic acids, and the like, being preferably used. Of these, azelaic acids and sebacic acids are preferable.
[0033] Further, examples of the carboxylic acid monoarnide include those in which one of the carboxyl groups of the above dicarboxylic acid is amidated.
Preferable examples include those in which one of the carboxyl groups of azelaic acid or sebacic acid is amidated.
[0034] Examples of the amine to be amidated include aliphatic primary amines such as butylamine, amylamine, hexylamirte, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristyl amine, palmityl amine, stearyl amine, and behenyl amine, aliphatic secondary amines such as dipropylamine, diisopropylamine, dibutylamine, diamylamine, dilaurylamine, monomethyl laurylamine, distearylamine, monomethyl stearylamine, dimyristylarnine, and dipalmitylamine, aliphatic unsaturated amines such as allylamine, diallylarnine, oleylamine, and dioleyIarnine, alicyclic amines such as cydopropylarnine, cyclobutylamine, cyclopentylamine, and cyclohexylamine, aromatic amines such as aniline, methylaniline, ethylaniline, benzylamine, dibenzylarnine, diphenylamine, and a-naphthylamine, with hexylamine, heptylamine, octylamine, nonylamine, decylamine, laurylamine, myristyl amine, palmityl amine, stearylamine, behenyl amine, dibutylamine, diamylamine, monomethyl laurylamine, monomethyl stearylamine, oleylamine, and the like, being preferably used, [0035] When the lithium complex soap or the barium complex soap is mixed, carboxylic acids and/or esters thereof and the above metal hydroxide may be fed to the base oil and saponified in the base oil to be mixed.
[0036] When the lithium complex soap or the barium complex soap is prepared by carrying out the saponification reaction in the base oil, it is preferable to use the combination of stearic acid and/or 12-hydroxystearic acid as the carboxylic acid and azelaic acid or sebacic acid and the like.
[0037] Note that when the saponification reaction is carried out in the base oil, a plurality of carboxylic acids and/or esters thereof and acid amide may be saponified simultaneously or may be saponified sequentially.
[00381 When the thickener is the lithium complex soap, the mixing ratio to the entire lubricating grease composition is preferably 8 to 18 mass%. When a mixing amount is less than 8 mass%, the degree of oil separation may increase likely decreasing the storage stability of the lubricating grease composition, whereas when such an amount is higher than 18 mass%, the low-temperature torque at a low temperature may increase.
[0039] When the thickener is the barium complex soap, the mixing ratio to the entire lubricating grease composition is preferably 27 to 33 mass%. When a mixing amount is less than 27 mass%, the degree of oil separation may increase likely decreasing the storage stability of the lubricating ,grease composition, whereas when such an amount is higher than 33 mass%, the low-temperature torque at a low temperature may decrease.
[0040] (Others) To the grease composition, other additives such as an antioxidant, a rust preventive, an extreme pressure agent, an oily agent, and a viscosity index improver, which have been added to the greases can be added as necessary in a = range within which the effects of the present invention are not affected.
[0041] Examples of the antioxidant include phenol-based antioxidants such as 2,6-ditertiary butyl-4-methylphenol and 4,4'-methylenebis(2,6-ditertiary butylphenol), amine-based antioxidants such as alkyl diphenylamine, = triphenylamine, phenyl-a-naphthylamine, phenothiazine, alkylated phenyl-a-naphthylarnine, and alkylated phenythiazine. Additionally, phosphorus-based antioxidants and sulfur-based antioxidants are also used.
[0042] Examples of the rust preventive include Ca salts or Na salts of aromatic sulfonic acids or saturated aliphatic dicarboxylic acids, fatty acids, fatty acid amines, alkylsulforlic acid metal salts, alkylsulfonic acid amine salts, oxidized paraffins, polyoxyalkyl ethers, and the like.
[0043] Examples of the extreme pressure agent include phosphorus-based compounds such as phosphate esters, phosphite esters, and phosphate ester amines, sulfur-based compounds such as sulfides, and disulfides, sulfur-based compound metal salts such as dialkyldithiophosphoric acid metal salts (excluding zinc salts) and dialkyldithiocarbamic acid metal salts, chlorine-based compounds such as chlorinated paraffins and chlorinated diphenyls, and organometallic compounds such as molybdenum dialkyldithiocarbamates (MoDTP), and the like.
[0044] Examples of the oily agent include fatty acids or esters thereof, higher alcohols, polyhydric alcohols or esters thereof, aliphatic esters, aliphatic amines, aliphatic monoglycerides, montan waxes, amide-based waxes, and the like.
100451 Examples of the viscosity index improver include polymethacrylates, ethylene-propylene copolymers, polyisobutylenes, polyalkylstyrenes, styrene-isoprene hydrogenated copolymers, and the like.
100461 The composition is prepared by a method wherein each of the above components are added in a predetermined amount and thoroughly kneaded using a triple roll or a high-pressure homogenizer.
Example [0047] Hereinafter, the present invention is described in further detail in reference with Examples but not limited to these Examples, [0048] (Examples 1 to 7 and Comparative Examples 1 to 6) (1) Preparation method of lubricating grease compositions = The preparation method of lubricating grease compositions was carried out by the following method.
(1-1) Case in which the lithium complex soap (Li-Comp) was used as the thickener First, the base oil and 12-hydroxystearic acid (thickener component) and lithium hydroxide (thickener component) were mixed in predetermined amounts in a mixing and stirring tank and stirred with heating at about 80 to 130 C to carry out the saponification reaction. Further, azelaic acid (thickener component) was mixed in a predetermined amount and stirred with heating at about 80 to 200 C, to which lithium hydroxide (thickener component) was further added to carry out the saponification reaction, followed by cooling to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 1 and Table 2. The saponification reaction was carried out for hour or more for the lubricating grease composition with which thickener A was mixed and less than 30 minutes. for the lubricating grease composition with which thickener E was mixed. Note that the amount of each component constituting the thickeners A, E mixed was, in both thickeners, 63.5 mass% of hydroxystearic acid, 19 mass% of azelaic acid and 17.5 mass% of lithium hydroxide, to the total amount of the thickener.
[0049] (1-2) Case in which the barium complex soap (13a-Comp) was used as the thickener First, the base oil and sebacic acid (thickener component) and carboxylic acid monostearyl amide (thickener component) were mixed in predetermined amounts in a mixing and stirring tank and stirred with heating at about 80 to 200 C, to which barium hydroxide (thickener component) was added to carry out the saponification reaction, followed by cooling to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 1 and Table 2. The saponification reaction was carried out for minutes or more for the lubricating grease composition with which thickener B
was mixed and less than 15 minutes for the lubricating grease composition with which thickener F was mixed. Note that the amount of each component constituting the thickeners B, F mixed was, in both thickeners, 27.5 mass% of sebacic acid, 41.5 mass% of carboxylic acid monostearyl amide and 31 mass% of barium hydroxide, to the total amount of the thickener.
[0050] (1-3) Case in which the lithium soap (Li-OHST) was used as the thickener First, the base oil and 12-hydroxystearic acid (thickener component) and lithium hydroxide (thickener component) were mixed in predetermined amounts in a mixing and stirring tank and stirred with heating at about 80 to 130 C to carry out the saponification reaction. The mixture was further stirred with heating to a melting temperature and subsequently cooled to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 2. Note that the amount of each component constituting the thickener C mixed was 88 mass% of 12-hydroxystearic acid and 12 mass% of lithium hydroxide, to the total amount of the thickener.
[0051] (1-4) Case in which Urea was used as the thickener First, the base oil and diphenylmethane diisotyanate (thickener component) and octylamine (thickener component) were stirred with heating at 70 to 180 C to carry out the reaction, and the temperature was elevated and cooled to produce a gelatinous substance. Each of the additives was added to the produced gelatinous substance, stirred and subsequently passed through a roll mill or a high-pressure homogenizer to prepare lubricating grease compositions containing each of the components shown below in the mixing amounts (mass%) shown in Table 2. Note that the amount of each component constituting the thickeners D mixed was 50 mass% of diphenylmethane diisocyanate and 50 mass% of octylarnine, to the total amount of the thickener.
[00521 Poly-cc-olefin A: 40 C kinetic viscosity 30 mm2/s (a product of INEOS
Oligomers Japan DURASYNTm 166) Poly-a-olefin13; 40 C kinetic viscosity 46 mrrizis (a product of INEOS
Oligomers Japan DURASYNThl 168) Poly-a-olefin C: 40 C kinetic viscosity 5 mm2/s (a product of INEOS
Oligomers Japan DURASYNTM 162) Poly-a-olefin D: 40 C kinetic viscosity 400 mm2/s (a product of INEOS
Oligomers Japan DURASYNTm 174) Ethylene-a-olefin copolymer: number average molecular weight 68000, weight average molecular weight 147000 (a product of SHOWA VARNISH CO., LTD. L6Z-25) Thickener A: Li-Comp having a drop point at 280 C (lithium complex soap) Thickener B: Ba-Comp having a drop point at 270 C (barium complex soap) Thickener C: Li-OHST having a drop point at 200 C (lithium soap) Thickener D: Urea having a drop point at 270 C (urea) Thickener E: Li-Comp having a drop point at 255 C (lithium complex soap) Thickener F: Ba-Comp having a drop point at 230 C (barium complex soap) Antioxidant: Phenylnaphthylamine (a product of SANYO CHEMICAL
INDUSVRIES, Ltd. VANLUBETm 81) Rust preventive: neutral calcium sulfonate (a product of KING
Industries, Inc., NA SULTM CA 1089) [0053] (2) Evaluation method (2-1) Base oil viscosity The base oil viscosity was measured in accordance with JIS 1(2283: 2000.
[0054] (2-2) Worked penetration The worked penetration was measured in accordance with JIS K2220.
7: 2013.
[0055] (2-3) Drop point The drop point was measured in accordance with JIS 1<2220. 8: 2013.
[0056] (2-4) Low-temperature property (low-temperature torque) In accordance with JIS 1(2220. 18: 2013, the maximum torque (starting torque) at -40 C obtained at the run-up time was measured. In the present invention, a numerical value (index) of the starting torque of 27 or less was defined as the passing level, whereas such a value of more than 27 was defined as failure.
[0057] (2-5) Compatibility of the resin with the grease composition under a high temperature use environment (breaking elongation) The grease was applied in a thickness of about 1 mm to the surface of Nylon 66 (registered trademark) as a test specimen prescribed in )IS K7162:
1994, the test specimen was allowed to stand in a thermostat at 150 C for 500 hours, subsequently the lubricant was wiped off, and the tensile test prescribed in JIS
K7162 (Plastics - Determination of Tensile Properties - Part 1: General principles) was carried out to measure a breaking elongation. In the present invention, a breaking elongation of 30% or more was defined as the passing level, whereas such an elongation of less than 30% was defined as failure.
[0058] (3) Evaluation results The evaluation results on the low-temperature properties (low-temperature torque) and the high-temperature properties (breaking elongation) =
when each of the lubricating grease compositions was applied to the polyamide resin member are shown in Table 1 and Table 2.
[0059] [Table 11 Example No. 1 , 2 3 4 .5 6 7 Poly-cu-olefin A 84.4 ¨ 84,9 ¨ 67.4 69.4 90,4 Base oil Poly-a-olefin B ¨ 82.4 ¨ 85.6 ¨ ¨
Ethylene-a-olefin copolymer ¨ ¨ 1.5 2.8 ¨ 2 Thickener A. . 15 17 13 11 ¨ ¨ 9 =
Thickener Thickener B ¨ ¨ ¨ ¨ 32 28 ¨
Antioxidant 0.5 0,5 0.5 0.5 0.5 0.5 0.5 Other additives Rust preventive 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Total (mass%) 100 100 100 100 100 100 100 Base oil 40 C kinetic viscosity (rnm2is) 30 46 100 200 30 46 Worked penetration of lubricating grease 265 255 275 290 275 Drop point of thickener ( C) 280 280 275 280 270 270 280 Low-temperature property: -40 C
starting torque Performance Resin compatibility: breaking elongation (%) [0060] [Table 2]
Comparative Example No. 1 2 3 4 5 6 =
Poly-a-olefin A 84.4 69.4 88.4 86.4 ¨
Base oil Poly-a-olefin C ¨ ¨ 84.4 ¨
Poly-a-olefin D ¨ 84.4 Thickener A 15 15 Thickener B ¨ ¨
Thickener C
Thickener Thickener D
Thickener E 15 Thickener F 30 ¨
Antioxidant 0.5 0.5 0.5 0.5 0.5 0.5 Other additives Rust preventive 0.1 0.1 0.1 0.1 0.1 0.1 Total (mass%) 100 100 100 100 100 100 Base oil 40 C kinetic viscosity (mm2/s) 30 30 30 30 5 4.01 Worked penetration of lubricating grease 280 260 270 285 275 Drop point of thickener ( C) DI 230 2.124 270 280 280 Low-temperature property: -40 C
15 24 14 16 12 4.
starting torque Performance Resin compatibility: breaking
21 22 10 22 24 30 elongation (%) (Note) The underlines at the numerical values in Table 2 indicate that the values are outside the suitable range of the present invention and the performance failed to achieve the passing level.
[0061] From the evaluation results shown in Table 1, all of Examples 1 to 7 maintained the starting torques at -40 C as low as 13 to 27 and the breaking elongations as high as 30 to 43%, thereby revealing good compatibility of the polyamide resin member with the grease compositions.
[00621 In contrast, from the evaluation results shown in Table 2, all of Comparative Examples 1 to 6 failed to achieve the passing levels of numerical values in either of the starting torque at -40 C or the breaking elongation.
Industrial Applicability [0063] The present invention thus enables the provision of the lubricating grease composition for a polyamide resin member capable of inhibiting the deterioration of the polyamide resin member particularly under a high-temperature use environment while having good low-temperature properties, thereby maintaining a breaking elongation at a high level without substantially decreasing it. The lubricating grease composition of the present invention is suitable to be used at a sliding portion of various machine parts constituting automobile, machine, electrical and electric equipment, and the like, that use resin materials such as polyamide resins, Specifically, in an automobile, examples include rolling bearings, sliding bearings and gear parts and cam parts of automobile accessories such as electric radiator fan motors, fan couplings, electronically controlled EGR, electronically controlled throttle valves, alternators, and electric power steerings, to which the lubricity is demanded.
[0061] From the evaluation results shown in Table 1, all of Examples 1 to 7 maintained the starting torques at -40 C as low as 13 to 27 and the breaking elongations as high as 30 to 43%, thereby revealing good compatibility of the polyamide resin member with the grease compositions.
[00621 In contrast, from the evaluation results shown in Table 2, all of Comparative Examples 1 to 6 failed to achieve the passing levels of numerical values in either of the starting torque at -40 C or the breaking elongation.
Industrial Applicability [0063] The present invention thus enables the provision of the lubricating grease composition for a polyamide resin member capable of inhibiting the deterioration of the polyamide resin member particularly under a high-temperature use environment while having good low-temperature properties, thereby maintaining a breaking elongation at a high level without substantially decreasing it. The lubricating grease composition of the present invention is suitable to be used at a sliding portion of various machine parts constituting automobile, machine, electrical and electric equipment, and the like, that use resin materials such as polyamide resins, Specifically, in an automobile, examples include rolling bearings, sliding bearings and gear parts and cam parts of automobile accessories such as electric radiator fan motors, fan couplings, electronically controlled EGR, electronically controlled throttle valves, alternators, and electric power steerings, to which the lubricity is demanded.
Claims (6)
1. A lubricating grease composition for a polyamide resin member to be supplied as a lubricant on a surface of at least a sliding portion of the polyamide resin member including the sliding portion with an other member, characterized in that the lubricating grease composition for the polyamide resin member comprises a base oil which is a single oil of a poly-.alpha.-olefin or a mixed oil of the poly-.alpha.-olefin and an ethylene-.alpha.-olefin copolymer having a kinetic viscosity at 40°C of 30 to 200 mm2/s, and a thickener which is at least one metal complex soap selected from a barium complex soap and a lithium complex soap, and a drop point of the thickener is 270°C or more.
2. The lubricating grease composition according to Claim 1, wherein the other member is a metal member.
3. The lubricating grease composition according to Claim 1, wherein the thickener is the lithium complex soap, and wherein a mixing ratio of the lithium complex soap to the lubricating grease composition is 8 to 18 mass percentage.
4. The lubricating grease composition according to Claim 3, wherein the other member is a metal member.
5. The lubricating grease composition according to Claim 1, wherein the thickener is the barium complex soap, and wherein a mixing ratio of the barium complex soap to the lubricating grease composition is 27 to 33 mass percentage.
6. The lubricating grease composition according to Claim 5, wherein the other member is a metal member.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-066850 | 2015-03-27 | ||
| JP2015066850 | 2015-03-27 | ||
| PCT/JP2016/054892 WO2016158071A1 (en) | 2015-03-27 | 2016-02-19 | Lubricating grease composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2980989A1 CA2980989A1 (en) | 2016-10-06 |
| CA2980989C true CA2980989C (en) | 2019-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2980989A Active CA2980989C (en) | 2015-03-27 | 2016-02-19 | Lubricating grease composition of mixed oils, soap and resin |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20180016517A1 (en) |
| JP (1) | JP6683196B2 (en) |
| CN (1) | CN107406792B (en) |
| CA (1) | CA2980989C (en) |
| MX (1) | MX2017012178A (en) |
| WO (1) | WO2016158071A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6702761B2 (en) * | 2016-02-26 | 2020-06-03 | 協同油脂株式会社 | Grease composition for ball joints |
| JP6712943B2 (en) | 2016-12-01 | 2020-06-24 | シェルルブリカンツジャパン株式会社 | Grease composition |
| FR3060604B1 (en) | 2016-12-15 | 2021-05-28 | Skf Ab | GREASE COMPOSITIONS AND THEIR MANUFACTURING PROCESS |
| FR3060605B1 (en) * | 2016-12-15 | 2021-05-28 | Skf Ab | GREASE COMPOSITIONS AND THEIR MANUFACTURING PROCESS |
| US11414616B2 (en) | 2018-12-20 | 2022-08-16 | Nok Klueber Co., Ltd. | Lubricating grease composition |
| CN109825348A (en) * | 2019-02-25 | 2019-05-31 | 江苏澳润新材料有限公司 | A kind of low temperature resistant lubricating grease and preparation method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100354399C (en) * | 2003-03-11 | 2007-12-12 | 日本精工株式会社 | Grease composition for resin lubrication and electrically operated power steering unit |
| JP5109331B2 (en) * | 2006-10-19 | 2012-12-26 | Ｎｏｋクリューバー株式会社 | Grease composition |
| JP2008274141A (en) * | 2007-04-27 | 2008-11-13 | Nok Kluber Kk | Grease composition |
| JP5091579B2 (en) * | 2007-07-26 | 2012-12-05 | 矢崎総業株式会社 | Load control device |
| JP5476076B2 (en) * | 2008-09-30 | 2014-04-23 | 昭和シェル石油株式会社 | Grease composition for resin lubrication |
| JP5476077B2 (en) * | 2008-09-30 | 2014-04-23 | 昭和シェル石油株式会社 | Grease composition for resin lubrication |
| CN102239240B (en) * | 2008-09-30 | 2013-08-28 | 国际壳牌研究有限公司 | Grease composition |
| JP5444806B2 (en) * | 2009-04-20 | 2014-03-19 | 協同油脂株式会社 | Grease composition and machine parts |
| JP5473627B2 (en) * | 2010-01-21 | 2014-04-16 | Ｎｏｋクリューバー株式会社 | Grease composition |
| JP5913007B2 (en) * | 2012-08-31 | 2016-04-27 | Ｊｘエネルギー株式会社 | Grease composition for electric power steering apparatus and electric power steering apparatus |
-
2016
- 2016-02-19 CA CA2980989A patent/CA2980989C/en active Active
- 2016-02-19 CN CN201680018638.5A patent/CN107406792B/en active Active
- 2016-02-19 MX MX2017012178A patent/MX2017012178A/en unknown
- 2016-02-19 JP JP2017509372A patent/JP6683196B2/en active Active
- 2016-02-19 WO PCT/JP2016/054892 patent/WO2016158071A1/en active Application Filing
-
2017
- 2017-09-21 US US15/711,039 patent/US20180016517A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CA2980989A1 (en) | 2016-10-06 |
| JP6683196B2 (en) | 2020-04-15 |
| CN107406792A (en) | 2017-11-28 |
| US20180016517A1 (en) | 2018-01-18 |
| JPWO2016158071A1 (en) | 2018-01-18 |
| WO2016158071A1 (en) | 2016-10-06 |
| MX2017012178A (en) | 2018-07-06 |
| CN107406792B (en) | 2021-03-09 |
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