EP1764407A1 - Lubricant composition - Google Patents
Lubricant composition Download PDFInfo
- Publication number
- EP1764407A1 EP1764407A1 EP06715134A EP06715134A EP1764407A1 EP 1764407 A1 EP1764407 A1 EP 1764407A1 EP 06715134 A EP06715134 A EP 06715134A EP 06715134 A EP06715134 A EP 06715134A EP 1764407 A1 EP1764407 A1 EP 1764407A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant composition
- oil
- thickener
- group
- composition according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- 239000000314 lubricant Substances 0.000 title claims abstract description 28
- 239000002562 thickening agent Substances 0.000 claims abstract description 29
- 239000003921 oil Substances 0.000 claims abstract description 19
- 150000003839 salts Chemical class 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 18
- 239000010702 perfluoropolyether Substances 0.000 claims abstract description 16
- 230000000996 additive effect Effects 0.000 claims abstract description 13
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 8
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims abstract description 6
- 125000003118 aryl group Chemical group 0.000 claims abstract description 4
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 claims abstract description 3
- 239000004519 grease Substances 0.000 claims description 17
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 229940000425 combination drug Drugs 0.000 claims 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 20
- 230000005764 inhibitory process Effects 0.000 abstract description 13
- 125000001153 fluoro group Chemical group F* 0.000 abstract 1
- -1 etc. Chemical compound 0.000 description 24
- 238000005260 corrosion Methods 0.000 description 16
- 230000007797 corrosion Effects 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 239000002199 base oil Substances 0.000 description 10
- 239000003112 inhibitor Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 description 8
- 239000011575 calcium Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 4
- XJHCXCQVJFPJIK-UHFFFAOYSA-M caesium fluoride Chemical compound [F-].[Cs+] XJHCXCQVJFPJIK-UHFFFAOYSA-M 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 239000011164 primary particle Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical class OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 3
- 239000012964 benzotriazole Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000003682 fluorination reaction Methods 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical compound FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000007539 photo-oxidation reaction Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- WXUAQHNMJWJLTG-UHFFFAOYSA-N 2-methylbutanedioic acid Chemical compound OC(=O)C(C)CC(O)=O WXUAQHNMJWJLTG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-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
- OFWDLJKVZZRPOX-UHFFFAOYSA-N 2,2,3,3-tetrafluorooxetane Chemical compound FC1(F)COC1(F)F OFWDLJKVZZRPOX-UHFFFAOYSA-N 0.000 description 1
- LOUICXNAWQPGSU-UHFFFAOYSA-N 2,2,3,3-tetrafluorooxirane Chemical compound FC1(F)OC1(F)F LOUICXNAWQPGSU-UHFFFAOYSA-N 0.000 description 1
- MDWVSAYEQPLWMX-UHFFFAOYSA-N 4,4'-Methylenebis(2,6-di-tert-butylphenol) Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 MDWVSAYEQPLWMX-UHFFFAOYSA-N 0.000 description 1
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 239000005069 Extreme pressure additive Substances 0.000 description 1
- QCNWZROVPSVEJA-UHFFFAOYSA-N Heptadecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCCCCCC(O)=O QCNWZROVPSVEJA-UHFFFAOYSA-N 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
- IFAWYXIHOVRGHQ-UHFFFAOYSA-N Nonadecandioic acid Chemical compound OC(=O)CCCCCCCCCCCCCCCCCC(O)=O IFAWYXIHOVRGHQ-UHFFFAOYSA-N 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
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Chemical class OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical class O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- ZFAKTZXUUNBLEB-UHFFFAOYSA-N dicyclohexylazanium;nitrite Chemical compound [O-]N=O.C1CCCCC1[NH2+]C1CCCCC1 ZFAKTZXUUNBLEB-UHFFFAOYSA-N 0.000 description 1
- WDNQRCVBPNOTNV-UHFFFAOYSA-N dinonylnaphthylsulfonic acid Chemical compound C1=CC=C2C(S(O)(=O)=O)=C(CCCCCCCCC)C(CCCCCCCCC)=CC2=C1 WDNQRCVBPNOTNV-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 150000002019 disulfides Chemical class 0.000 description 1
- TVIDDXQYHWJXFK-UHFFFAOYSA-N dodecanedioic acid Chemical compound OC(=O)CCCCCCCCCCC(O)=O TVIDDXQYHWJXFK-UHFFFAOYSA-N 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 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
- 238000011156 evaluation Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PGFXOWRDDHCDTE-UHFFFAOYSA-N hexafluoropropylene oxide Chemical compound FC(F)(F)C1(F)OC1(F)F PGFXOWRDDHCDTE-UHFFFAOYSA-N 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- JJOJFIHJIRWASH-UHFFFAOYSA-N icosanedioic acid Chemical compound OC(=O)CCCCCCCCCCCCCCCCCCC(O)=O JJOJFIHJIRWASH-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011707 mineral Substances 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
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 150000002763 monocarboxylic acids Chemical class 0.000 description 1
- BNJOQKFENDDGSC-UHFFFAOYSA-N octadecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCCCCCCC(O)=O BNJOQKFENDDGSC-UHFFFAOYSA-N 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical class CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 125000005004 perfluoroethyl group Chemical group FC(F)(F)C(F)(F)* 0.000 description 1
- 125000005009 perfluoropropyl group Chemical group FC(C(C(F)(F)F)(F)F)(F)* 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical class OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229940116351 sebacate Drugs 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-L sebacate(2-) Chemical compound [O-]C(=O)CCCCCCCCC([O-])=O CXMXRPHRNRROMY-UHFFFAOYSA-L 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- HQHCYKULIHKCEB-UHFFFAOYSA-N tetradecanedioic acid Chemical compound OC(=O)CCCCCCCCCCCCC(O)=O HQHCYKULIHKCEB-UHFFFAOYSA-N 0.000 description 1
- VLLMWSRANPNYQX-UHFFFAOYSA-N thiadiazole Chemical compound C1=CSN=N1.C1=CSN=N1 VLLMWSRANPNYQX-UHFFFAOYSA-N 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- 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
- LWBHHRRTOZQPDM-UHFFFAOYSA-N undecanedioic acid Chemical compound OC(=O)CCCCCCCCCC(O)=O LWBHHRRTOZQPDM-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Chemical class 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
-
- 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
- C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
- C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
-
- 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
-
- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/006—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions used as thickening agents
-
- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/0606—Perfluoro polymers used as base material
-
- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/0613—Perfluoro polymers used as thickening agents
-
- 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/062—Polytetrafluoroethylene [PTFE]
- C10M2213/0626—Polytetrafluoroethylene [PTFE] used as thickening agents
-
- 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
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
-
- 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
-
- 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
-
- 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
- C10N2030/08—Resistance to extreme temperature
-
- 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
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- 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
-
- 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 lubricant composition, and more particularly to a lubricant composition with a distinguished rust inhibition, particularly even after having been subjected to heat hysteresis.
- Lubricants such as grease, etc. are widely used in lubrication of various machines including automobiles, construction machines, industrial machines, machine tools, etc., and also various parts as members of the machines.
- the machines have a possibility of water intrusion, depending on the locations where they are used, and thus requirements for the rust inhibition thereof are more and more strict.
- recent trends towards higher speed much more size reduction, higher performance, lighter weight, etc. have made service temperatures of these peripheral equipment higher and higher, so the rust inhibition after having been subjected to such heat hysteresis has been also an important requirement.
- a grease composition for ball-and-roller bearings which comprises a grease composition containing silicone oil- or fluorocarbon oilbased lubricating oil as a base oil, and a rust inhibitor comprising a magnesium compound and a volatile rust inhibitor as essential components has been so far proposed, where triazole-based compound such as benzotriazole, methylbenzotriazole, etc., or dicyclohexyl ammonium nitrite have been recommended as preferable volatile rust inhibitors.
- Patent Literature 1 JP-A-9-59664
- the proposed grease composition for ball-and-roller bearings is said to have a distinguished rust inhibitive action in addition to a high durability at elevated temperatures, but it contains a volatile rust inhibitor as one of rust inhibitor components, so a long term rust inhibition at elevated temperatures is not satisfactory, and as to the alkaline component such as magnesium oxide, etc., their influence on the environments must be taken into consideration.
- a heat-resistant grease composition which comprises fluorosilicone oil, a fluororesin-based thickener, and an additive such as calcium alkylsulfonate, etc., and which can also contain other well known thickeners such as calcium stearate, etc. has been also proposed, where it is shown by evaporation tests or engine tests that the heat resistance is distinguished and also stable for a long time, but no mention is made of the rust inhibition, particularly even after having been subjected to heat resistance tests.
- Patent Literature 2 JP-A-8-143883
- a lubricating grease composition which comprises perfluoropolyether base oil, and a metal salt of aliphatic dicarboxylic acid as a thickener, where the applicant shows that the composition can further contain a powdery fluororesin to attain improvements of abrasion resistance of mating material, leakage resistance, detergency, etc.
- Patent Literature 3 JP-A-2001-354986
- a mixing proportion of the metal salt of aliphatic dicarboxylic acid used as a thickener is about 1 to about 50% by weight, preferably 3 to 35% by weight, on the basis of the composition.
- the thickener is used in such preferable mixing proportions.
- the powdery fluororesin as an admixable component it is recommended that the admixing proportion is not more than about 50% by weight, preferably about 3 to about 35% by weight, on the basis of the composition.
- the admixing proportion of powdery fluororesin is 5% by weight, whereas that of metal salt of aliphatic dicarboxylic acid as a thickener is 15-25% by weight.
- an increase in the admixing proportion of metal salt of aliphatic dicarboxylic acid as a thickener will inhibit any increase the admixing proportion of powdery fluororesin.
- An object of the present invention is to provide a lubricant composition with a distinguished rust inhibition, particularly even after having been subjected to heat hysteresis, which comprises a fluoro-oil and an appropriate admixing proportion of powdery fluororesin as a thickener.
- the object of the present invention can be attained by a lubricant composition, which comprises a fluoro-oil, a powdery fluororesin thickener, and a Ca salt or a Na salt of aromatic sulfonic acid or saturated aliphatic dicarboxylic acid as a rust-inhibitive additive, where the proportion of the thickener is 10-40% by weight, and that of the additive is 0.3-10% by weight, on the basis of the total weight of the composition, the balance being the fluoro-oil.
- perfluoropolyether oils are used as a fluoro-oil.
- the present lubricant composition has a distinguished rust inhibition, particularly even after having been subjected to heat hysteresis, and thus can be used widely in lubrication of machines and their parts to be used particularly outdoors, and specifically used in effective lubrication of bearings requiring substantial rust inhibition, heat resistance, low-temperature characteristics, load-carrying capacity, etc. in automobile auxil-iary equipment such electric fan motors, fuel injector equipments, alternators, etc. of automobiles. Furthermore, the present lubricant composition can be used for lubrication of solid-solid contacts such as sliding parts of ball-and-roller bearings, slide bearings, sintered bearings, gears, valve, cocks, oil seals, rolls, electric contacts, etc.
- Fluoro-oil for use as a base oil generally includes perfluoropolyether oil.
- Perfluoropolyether represented by the following general formula can be used for this purpose : RfO(CF 2 O) x (C 2 F 4 O) y (C 3 F 6 O) z Rf Specifically, those represented, for example, by the following formulae (1)-(3) can be used, and in addition, the one represented by the following general formula (4) can be also used, where Rf is a perfluoro lower alkyl groups having 1-5 carbon atoms, preferably 1-3 carbon atoms, such as a perfluoromethyl group, a perfluoroethyl group, perfluoropropyl group, etc.
- the perfluoropolyether (1) can be obtained by complete fluorination of a precursor formed by photo-oxidation polymerization of tetra-fluoroethylene.
- the perfluoropolyether (2) can be obtained by complete fluorination of a precursor formed by photo-oxidation polymerization of hexafluoropropene and tetra-fluoroethylene.
- the perfluoropolyether (4) can be obtained by anionic polymerization of 2,2,3,3-tetrafluorooxetane in the presence of a cesium fluoride catalyst, followed by treatment of the resulting fluorine -containing polyether (CH 2 CF 2 CF 2 O) n under ultraviolet irradiation at about 160° to about 300°C with a fluorine gas.
- perfluoropolyether base oils can be used alone or in a mixture thereof, and when used as a lubricating oil the viscosity (40°C) is desirably about 5 to about 2,000mm 2 /sec, preferably about 10 to about 1,500mm 2 /sec.
- the evaporation rate When the viscosity is less than about 5mm 2 /sec., the evaporation rate will be increased, and will fail to satisfy the requirements for evaporation rate of 1.5% or less set forth in JIS ball-and-roller bearing grease, class 3 as a heat-resistant grease, whereas when the viscosity is more than about 2, 000mm 2 /sec, the pour point (JIS K-2283) will be more than 10 °C , and bearings, gears, chains, etc. fail to start at low temperatures in the ordinary manner, resulting in necessary heating for starting, that is, a failure to meet the admissible limit to use as the ordinary grease.
- Fluororesin for use herein as a thickener includes polytetrafluoroethylene [PTFE], tetrafluoroethylene-hexafluoropropene copolymer [FEP], perfluoroalkylene resin, etc., so far used as a lubricant.
- PTFE polytetrafluoroethylene
- FEP tetrafluoroethylene-hexafluoropropene copolymer
- perfluoroalkylene resin etc.
- PTFE having a melting point of 300°C or higher which is suitable for use in the present invention, it is desirable that Mn is about 10,000 or more.
- Control of molecular weight can be also carried out by using a chain transfer agent during the copolymerization reaction.
- the resulting powdery fluororesin having, among others, an average primary particle size of generally about 500 ⁇ m, preferably about 0.1 to about 30 ⁇ m, can be used.
- the powdery fluororesin can be used in a proportion of 10-40% by weight, preferably 15-35% by weight, on the basis of total weight with base oil and rust-inhibitive additive.
- the fluororesin thickener is used in a proportion of above 40% by weight, the composition will be too hard, whereas in a proportion below 10% by weight, no satisfactory thickening capacity of fluororesin etc. can be obtained, resulting in deterioration such as oil separation, and any increase in scattering prevention and leakage prevention can be no more expected.
- the powdery fluororesin can be used together with other thickeners, which include metal soaps such as Li soap, etc., urea resin, minerals such as bentonite, silica, clay, graphite, carbon, zinc oxide, etc., organic pigments, polyethylene, polypropylene, and polyamide. From the viewpoints of heat resistance and lubricability, it is preferable to use monoamide monocarboxylic acid metal salts, monoester carboxylic acid metal salts, diurea, triurea, tetraurea, etc. These other thickeners having a melting point of 300°C or higher can be preferably used.
- Aromatic sulfonic acid salts for use herein as a rust-inhibitive additive include, for example, Ca salts or Na salts of petroleum sulfonic acid, alkylbenzene sulfonic acid, dialkylnaphtharene sulfonic acid, etc.
- the sulfonic acid salts having an aromatic ring are distinguished in both heat resistance and rust inhibition.
- Saturated aliphatic dicarboxylic acids for use herein as a rust-inhibitive additive include, for example, Ca salts or Na salts of oxalic acid, malonic acid, succinic acid, methylsuccinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, nonamethylenedicarboxylic acid, decamethylenedicarboxylic acid, undecamethylenedicarboxylic acid, dodecamethylenedicarboxylic acid, tridecamethylnenedicarboxylic acid, tetradecamethylenedicarboxylic acid, pentadecamethylenedicarboxylic acid, hexadecamethylenedicarboxylic acid, heptadecamethylenedicarboxylic acid, octadecamethylenedicarboxylic acid, etc.
- These with an aliphatic group having 6-12 carbon atoms are preferably used particularly in respect to the distinguished rust inhibition.
- rust-inhibitive additives can be used in a proportion of 0.3-10% by weight, preferably 0.3-5% by weight, on the basis of total weight with base oil and powdery fluororesin thickener. In a proportion below 0.3% by weight no desired rust-inhibitive effect can be obtained, whereas in a proportion above 10% by weight no desired proportion of the thickener can be admixed, and no thickening effect can be expected.
- the lubricant composition can further contain other additives so far used in the conventional lubricant, such as an antioxidant, other rust-inhibitors, a corrosion inhibitor, an extreme pressure additive, an oiliness agent, a solid lubricant, etc., when required.
- the antioxidant includes, for example phenol-based antioxidants such as 2,6-di-t-butyl-4-methylphenol, 4,4' -methylenebis(2,6-di-t-butylphenol), etc.
- antioxidants such as alkyldiphenylamine, triphenylamine, phenyl- ⁇ -naphthylamine, phenothiazine, alkylated phenyl- ⁇ -naphtylamine, phenithiazine, alkylated phenithiazine, etc.
- rust inhibitors include, for example, fatty acids, fatty acid amines, alkylsulfonic acid metal salts, alkylsulfonic acid amine salts, oxidiged paraffin, polyoxyalkylethers, etc.
- the corrosion inhibitors include, for example, benzotriazole, benzoimidazole, thiadiazole, etc.
- the extreme pressure agent includes, for example, phosphorus-based compounds such as phosphoric acid esters, phosphorous acid esters, phosphoric acid ester amine salts, etc., sulfur-based compounds such as sulfides, disulfides, etc., and sulfur-based compound metal salts, such as dialkyldithiophosphoric acid metal salts, dialkyldithiocarbamic acid metal salts, etc.
- phosphorus-based compounds such as phosphoric acid esters, phosphorous acid esters, phosphoric acid ester amine salts, etc.
- sulfur-based compounds such as sulfides, disulfides, etc.
- sulfur-based compound metal salts such as dialkyldithiophosphoric acid metal salts, dialkyldithiocarbamic acid metal salts, etc.
- the oiliness agent includes, for example, fatty acids, or their esters, higher alcohols, polyhydric alcohols, or their esters, aliphatic amines, fatty acid monoglycerides, etc.
- the other solid lubricant includes, for example, molybdenum disulfide, graphite, boron nitride, silane nitride, etc.
- the composition can be prepared by adding predetermined amounts of a powdery fluororesin thickener, a rust-inhibitive additive and other necessary additives to perfluoropolyether base oil, followed by through stirring in a stirring kettle, etc. and then by homogenization treatment through three-rolls, or in a high pressure homogenizer.
- the resulting lubricant compositions were subjected to MKO test (corrosion degree).
- the test included, in addition to the test under the following ordinary conditions, comparison of corrosion degrees after having been subjected to heat hysteresis at 180°C for 500 hours as to heating grease-sealed test bearings, followed by similar test to the above.
- Lubricant composition of Comparative Example 7 had a consistency number (JIS K2220 7 ; corresponding to DIN ISO 2137) of No. 4 and therefore too hard impossible to test and to use as a practical grease.
- the lubricating oil composition of all the Examples had consistency numbers of Nos. 1-3, and could form greases successfully.
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Abstract
Description
- The present invention relates to a lubricant composition, and more particularly to a lubricant composition with a distinguished rust inhibition, particularly even after having been subjected to heat hysteresis.
- Lubricants such as grease, etc. are widely used in lubrication of various machines including automobiles, construction machines, industrial machines, machine tools, etc., and also various parts as members of the machines. The machines have a possibility of water intrusion, depending on the locations where they are used, and thus requirements for the rust inhibition thereof are more and more strict. Furthermore, recent trends towards higher speed, much more size reduction, higher performance, lighter weight, etc. have made service temperatures of these peripheral equipment higher and higher, so the rust inhibition after having been subjected to such heat hysteresis has been also an important requirement.
- To improve the rust inhibition use of some of additives have been studied. A grease composition for ball-and-roller bearings, which comprises a grease composition containing silicone oil- or fluorocarbon oilbased lubricating oil as a base oil, and a rust inhibitor comprising a magnesium compound and a volatile rust inhibitor as essential components has been so far proposed, where triazole-based compound such as benzotriazole, methylbenzotriazole, etc., or dicyclohexyl ammonium nitrite have been recommended as preferable volatile rust inhibitors.
Patent Literature 1 :JP-A-9-59664 - The proposed grease composition for ball-and-roller bearings is said to have a distinguished rust inhibitive action in addition to a high durability at elevated temperatures, but it contains a volatile rust inhibitor as one of rust inhibitor components, so a long term rust inhibition at elevated temperatures is not satisfactory, and as to the alkaline component such as magnesium oxide, etc., their influence on the environments must be taken into consideration.
- A heat-resistant grease composition, which comprises fluorosilicone oil, a fluororesin-based thickener, and an additive such as calcium alkylsulfonate, etc., and which can also contain other well known thickeners such as calcium stearate, etc. has been also proposed, where it is shown by evaporation tests or engine tests that the heat resistance is distinguished and also stable for a long time, but no mention is made of the rust inhibition, particularly even after having been subjected to heat resistance tests.
Patent Literature 2 :JP-A-8-143883 - The present applicant has previously proposed a lubricating grease composition, which comprises perfluoropolyether base oil, and a metal salt of aliphatic dicarboxylic acid as a thickener, where the applicant shows that the composition can further contain a powdery fluororesin to attain improvements of abrasion resistance of mating material, leakage resistance, detergency, etc.
Patent Literature 3 :JP-A-2001-354986 - It is recommended that in the proposed lubricating grease composition a mixing proportion of the metal salt of aliphatic dicarboxylic acid used as a thickener is about 1 to about 50% by weight, preferably 3 to 35% by weight, on the basis of the composition. In the disclosed Examples 1 to 14 relate to lubricating grease compositions consisting of two components, i.e. the thickener and perfluoropolyether oil, the thickener is used in such preferable mixing proportions.
- As to the powdery fluororesin as an admixable component, it is recommended that the admixing proportion is not more than about 50% by weight, preferably about 3 to about 35% by weight, on the basis of the composition. In the disclosed Examples 15 to 17 relate to lubricating grease composition consisting of these three components, it is recommended that the admixing proportion of powdery fluororesin is 5% by weight, whereas that of metal salt of aliphatic dicarboxylic acid as a thickener is 15-25% by weight. As is known from such results, an increase in the admixing proportion of metal salt of aliphatic dicarboxylic acid as a thickener will inhibit any increase the admixing proportion of powdery fluororesin.
- An object of the present invention is to provide a lubricant composition with a distinguished rust inhibition, particularly even after having been subjected to heat hysteresis, which comprises a fluoro-oil and an appropriate admixing proportion of powdery fluororesin as a thickener.
- The object of the present invention can be attained by a lubricant composition, which comprises a fluoro-oil, a powdery fluororesin thickener, and a Ca salt or a Na salt of aromatic sulfonic acid or saturated aliphatic dicarboxylic acid as a rust-inhibitive additive, where the proportion of the thickener is 10-40% by weight, and that of the additive is 0.3-10% by weight, on the basis of the total weight of the composition, the balance being the fluoro-oil. In general, perfluoropolyether oils are used as a fluoro-oil.
- The present lubricant composition has a distinguished rust inhibition, particularly even after having been subjected to heat hysteresis, and thus can be used widely in lubrication of machines and their parts to be used particularly outdoors, and specifically used in effective lubrication of bearings requiring substantial rust inhibition, heat resistance, low-temperature characteristics, load-carrying capacity, etc. in automobile auxil-iary equipment such electric fan motors, fuel injector equipments, alternators, etc. of automobiles. Furthermore, the present lubricant composition can be used for lubrication of solid-solid contacts such as sliding parts of ball-and-roller bearings, slide bearings, sintered bearings, gears, valve, cocks, oil seals, rolls, electric contacts, etc.
- Fluoro-oil for use as a base oil generally includes perfluoropolyether oil. Perfluoropolyether represented by the following general formula can be used for this purpose :
RfO(CF2O)x(C2F4O)y(C3F6O)zRf
Specifically, those represented, for example, by the following formulae (1)-(3) can be used, and in addition, the one represented by the following general formula (4) can be also used, where Rf is a perfluoro lower alkyl groups having 1-5 carbon atoms, preferably 1-3 carbon atoms, such as a perfluoromethyl group, a perfluoroethyl group, perfluoropropyl group, etc.
(1) RfO(CF2CF2O)m(CF2O)nRf
In the formula (1), m+n=3-200, and m:n=10-90:90-10, and the CF2CF2O group and the CF2O group are in random combination in the main chain. The perfluoropolyether (1) can be obtained by complete fluorination of a precursor formed by photo-oxidation polymerization of tetra-fluoroethylene.
(2) RfO[CF(CF3)CF2O]p(CF2CF2O)q(CF2O)rRf
In the formula (2), p+q+r=3-200, q and r can be 0, respectively, and (q+r)/p=0-2:1, and the CF(CF3)CF2O group, the CF2CF2O group, and the CF2O group are in random combination in the main chain. The perfluoropolyether (2) can be obtained by complete fluorination of a precursor formed by photo-oxidation polymerization of hexafluoropropene and tetra-fluoroethylene.
(3) RfO[CF(CF3)CF2O]s(CF2CF2O)tRf
In the formula (3), s+t=2-200, t can be 0, and t/s=0-2:1, and the CF(CF3)CF2O group and the CF2CF2O group are in random combination in the main chain, and the perfluoropolyether (3) can be obtained by complete fluorination of a precursor formed by photo-oxidation polymerization of hexafluoropropene and tetrafluoroethylene, or by anionic polymerization of hexafluoropropylene oxide or tetrafluoroethylene oxide in the presence of a cesium fluoride catalyst, followed by successive treatment of the resulting acid fluoride compound having a terminal-CF(CF3)COF group with a fluorine gas.
(4) F(CF2CF2CF2O)2-100C2F5
The perfluoropolyether (4) can be obtained by anionic polymerization of 2,2,3,3-tetrafluorooxetane in the presence of a cesium fluoride catalyst, followed by treatment of the resulting fluorine -containing polyether (CH2CF2CF2O)n under ultraviolet irradiation at about 160° to about 300°C with a fluorine gas. - These perfluoropolyether base oils can be used alone or in a mixture thereof, and when used as a lubricating oil the viscosity (40°C) is desirably about 5 to about 2,000mm2/sec, preferably about 10 to about 1,500mm2/sec. When the viscosity is less than about 5mm2/sec., the evaporation rate will be increased, and will fail to satisfy the requirements for evaporation rate of 1.5% or less set forth in JIS ball-and-roller bearing grease, class 3 as a heat-resistant grease, whereas when the viscosity is more than about 2, 000mm2/sec, the pour point (JIS K-2283) will be more than 10 °C , and bearings, gears, chains, etc. fail to start at low temperatures in the ordinary manner, resulting in necessary heating for starting, that is, a failure to meet the admissible limit to use as the ordinary grease.
- Fluororesin for use herein as a thickener includes polytetrafluoroethylene [PTFE], tetrafluoroethylene-hexafluoropropene copolymer [FEP], perfluoroalkylene resin, etc., so far used as a lubricant. Polytetrafluoroethylene obtained by subjecting tetrafluoroethylene to such a process as emulsion polymerization, suspension polymerization, solution polymerization, or the like, thereby preparing polytetrafluoroethylene, followed by subjecting it to a treatment by such a process as heat decomposition, decomposition using electron beam irradiation, physical pulverization, or the like, thereby reducing the number average molecular weight Mn from about 1,000- 1,000,000 to about 1,000- 500,000, can be used. Tetrafluoroethylene-hexafluoropropene copolymer having a number average molecular weight of about 1,000 to about 600,000, obtained by conducting copolymerization reaction of tetrafluoroethylene and hexafluoropropene and treatment to reduce the molecular weight, in the same manner as in the case of polytetrafluoroethylene can be used. To obtain PTFE having a melting point of 300°C or higher, which is suitable for use in the present invention, it is desirable that Mn is about 10,000 or more. Control of molecular weight can be also carried out by using a chain transfer agent during the copolymerization reaction. The resulting powdery fluororesin having, among others, an average primary particle size of generally about 500 µm, preferably about 0.1 to about 30 µm, can be used.
- The powdery fluororesin can be used in a proportion of 10-40% by weight, preferably 15-35% by weight, on the basis of total weight with base oil and rust-inhibitive additive. When the fluororesin thickener is used in a proportion of above 40% by weight, the composition will be too hard, whereas in a proportion below 10% by weight, no satisfactory thickening capacity of fluororesin etc. can be obtained, resulting in deterioration such as oil separation, and any increase in scattering prevention and leakage prevention can be no more expected.
- The powdery fluororesin can be used together with other thickeners, which include metal soaps such as Li soap, etc., urea resin, minerals such as bentonite, silica, clay, graphite, carbon, zinc oxide, etc., organic pigments, polyethylene, polypropylene, and polyamide. From the viewpoints of heat resistance and lubricability, it is preferable to use monoamide monocarboxylic acid metal salts, monoester carboxylic acid metal salts, diurea, triurea, tetraurea, etc. These other thickeners having a melting point of 300°C or higher can be preferably used.
- Aromatic sulfonic acid salts for use herein as a rust-inhibitive additive include, for example, Ca salts or Na salts of petroleum sulfonic acid, alkylbenzene sulfonic acid, dialkylnaphtharene sulfonic acid, etc. The sulfonic acid salts having an aromatic ring are distinguished in both heat resistance and rust inhibition.
- Saturated aliphatic dicarboxylic acids, for use herein as a rust-inhibitive additive include, for example, Ca salts or Na salts of oxalic acid, malonic acid, succinic acid, methylsuccinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, nonamethylenedicarboxylic acid, decamethylenedicarboxylic acid, undecamethylenedicarboxylic acid, dodecamethylenedicarboxylic acid, tridecamethylnenedicarboxylic acid, tetradecamethylenedicarboxylic acid, pentadecamethylenedicarboxylic acid, hexadecamethylenedicarboxylic acid, heptadecamethylenedicarboxylic acid, octadecamethylenedicarboxylic acid, etc. These with an aliphatic group having 6-12 carbon atoms are preferably used particularly in respect to the distinguished rust inhibition.
- These rust-inhibitive additives can be used in a proportion of 0.3-10% by weight, preferably 0.3-5% by weight, on the basis of total weight with base oil and powdery fluororesin thickener. In a proportion below 0.3% by weight no desired rust-inhibitive effect can be obtained, whereas in a proportion above 10% by weight no desired proportion of the thickener can be admixed, and no thickening effect can be expected.
- Even among these aromatic sulfonic acids and saturated aliphatic dicarboxylic acids, the amine salts have no satisfactory heat resistance, whereas the Ba salts and Zn salts have satisfactory rust inhibition and heat resistance, but must be labeled from the viewpoint of recent environmental problem.
- The lubricant composition can further contain other additives so far used in the conventional lubricant, such as an antioxidant, other rust-inhibitors, a corrosion inhibitor, an extreme pressure additive, an oiliness agent, a solid lubricant, etc., when required. The antioxidant includes, for example phenol-based antioxidants such as 2,6-di-t-butyl-4-methylphenol, 4,4' -methylenebis(2,6-di-t-butylphenol), etc. and amine-based antioxidants such as alkyldiphenylamine, triphenylamine, phenyl- α -naphthylamine, phenothiazine, alkylated phenyl- α -naphtylamine, phenithiazine, alkylated phenithiazine, etc.
- Other rust inhibitors include, for example, fatty acids, fatty acid amines, alkylsulfonic acid metal salts, alkylsulfonic acid amine salts, oxidiged paraffin, polyoxyalkylethers, etc. The corrosion inhibitors include, for example, benzotriazole, benzoimidazole, thiadiazole, etc.
- The extreme pressure agent includes, for example, phosphorus-based compounds such as phosphoric acid esters, phosphorous acid esters, phosphoric acid ester amine salts, etc., sulfur-based compounds such as sulfides, disulfides, etc., and sulfur-based compound metal salts, such as dialkyldithiophosphoric acid metal salts, dialkyldithiocarbamic acid metal salts, etc.
- The oiliness agent includes, for example, fatty acids, or their esters, higher alcohols, polyhydric alcohols, or their esters, aliphatic amines, fatty acid monoglycerides, etc. The other solid lubricant includes, for example, molybdenum disulfide, graphite, boron nitride, silane nitride, etc.
- The composition can be prepared by adding predetermined amounts of a powdery fluororesin thickener, a rust-inhibitive additive and other necessary additives to perfluoropolyether base oil, followed by through stirring in a stirring kettle, etc. and then by homogenization treatment through three-rolls, or in a high pressure homogenizer.
- The present invention will be described below, referring to Examples.
- The following base oils, thickeners, and rust-inhibitive additives could be easily mixed together only by stirring, thereby preparing lubricant compositions.
[Base oil] - A-1 : RfO(CF2CF2O)m(CF2O)nRf Viscosity (40°C) 85mm2/sec.
- A-2 : RfO(CF2CF2O)m(CF2O)nRf Viscosity (40°C)150mm2/sec.
- A-3 : RfO[CF(CF3)CF2O]pRf Viscosity (40°C)390mm2/sec.
- A-4 : RfO[CF(CF3)CF2O]p(CF2C)rRf Viscosity (40°C)230mm2/sec.
- A-5 : F(CF2CF2CF2O)2-100C2F5 Viscosity (40°C)200mm2/sec.
- B-1 : Emulsion-polymerized PTFE (molecular weight: 100-200 × 103; melting point:330°C; average primary particle size:0.2 µm)
- B-2 : Suspension-polymerized PTFE (molecular weight:10-100 × 103; melting point:318°C; average primary particle size:5 µm)
- B-3 : Solution polymerized FEP (molecular weight:50-150 × 103; melting point:256°C; average primary particle size:0.2 µm)
- C-1 : Ca dinonylnaphthalene sulfonate
- C-2 : Na petroleum sulfonate
- C-3 : Na sebacate
- C-4 : PfO[CF(CF3)CF2O]nCF(CF3)COOH
- C-5 : Benzotriazole
- C-6 : Octylamine salt of dinonylnaphthalene sulfonic acid
- The resulting lubricant compositions were subjected to MKO test (corrosion degree). The test included, in addition to the test under the following ordinary conditions, comparison of corrosion degrees after having been subjected to heat hysteresis at 180°C for 500 hours as to heating grease-sealed test bearings, followed by similar test to the above.
- 1306K bearings were sealed with grease, amounted on an EKO tester, and tested under such cycle conditions as revolution rate : 80rpm ; revolution cycle : revolution for 8 hours→stoppage for 16 hours→revolution for 8 hours→stoppage for 16 hours→revolution for 8 hours→stoppage for 108 hours (total 164 hours) to evaluate corrosion states on the outer race track surface of the bearing according to the following basis.
In the test, distilled water was used.
Corrosiondegree Appearance Evaluation basis 0 No corrosion No changes 1 Traces of corrosion Up to 3 corrosion points in sizes of 1mm or less 2 Weakly corroded Corroded portions at corrosion degree of 1 or more being within 1% of the surface 3 Corroded Corrosion extended in a range of 1-5% of the surface 4 Strongly corroded Corrosion extended in a range of 5-10% of the surface 5 Much strongly corroded Corrosion extended in a range of 10% or more of the surface Table EMK Test Example No. Base oil Thickener Rust-inhibitive additive Normal corrosion degree After heating corrosion degree Species wt.% Species wt.% Species wt.% Example 1 A-1 74.2 B-1 24 C-1 1.8 0 0 " 2 " 74 " " C-2 2.0 0 1 " 3 " 72.6 " " C-3 3.4 0 0 " 4 " 67.2 B-2 31 C-1 1.8 0 0 " 5 " 67 " " C-2 2.0 0 1 " 6 " 65.6 " " C-3 3.4 0 0 " 7 " 77.2 B-3 21 C-1 1.8 0 0 " 8 " 77 " " C-2 2.0 0 1 " 9 " 75.6 " " C-3 3.4 0 0 " 10 A-2 74.2 B-1 24 C-1 1.8 0 0 " 11 " 74 " " C-2 2.0 0 1 " 12 " 72.6 " " C-3 3.4 0 0 " 13 " 67.2 B-2 31 C-1 1.8 0 0 " 14 " 67 " " C-2 2.0 0 1 " 15 " 65.6 " " C-3 3.4 0 0 " 16 A-3 74.2 B-1 24 C-1 1.8 0 0 " 17 " 74 " " C-2 2.0 0 0 " 18 " 67.2 B-2 31 C-1 1.8 0 0 " 19 " 67 " " C-2 2.0 0 0 " 20 A-4 74.2 B-1 24 C-1 1.8 0 0 " 21 " 74 " " C-2 2.0 0 0 " 22 " 72.6 " " C-3 3.4 0 0 " 23 A-5 74.2 " " C-1 1.8 0 0 " 24 " 74 " " C-2 2.0 0 0 " 25 " 72.6 " " C-3 3.4 0 0 Comp.Ex.1 A-1 73 " " C-4 3.0 4 5 " 2 " 75 " " C-5 1.0 2 5 " 3 " 74 " " C-6 2.0 0 5 " 4 A-2 73 " " C-4 3.0 4 5 " 5 " 75 " " C-5 1.0 2 5 " 6 " 74 " " C-6 2.0 0 4 " 7 A-1 61 " " C-3 15 - - - Lubricant composition of Comparative Example 7 had a consistency number (JIS K2220 7 ; corresponding to DIN ISO 2137) of No. 4 and therefore too hard impossible to test and to use as a practical grease. The lubricating oil composition of all the Examples had consistency numbers of Nos. 1-3, and could form greases successfully.
Claims (9)
- A lubricant composition, which comprises a fluoro-oil, a powdery fluororesin thickener, and Ca salt or Na salt of aromatic sulfonic acid or saturated aliphatic dicarboxylic acid as a rust-inhibitive additive, where the thickener is in a proportion of 10-40% by weight, and the additive is in a proportion of 0.3-10% by weight on the basis of total weight of the composition, the balance being the fluoro-oil.
- A lubricant composition according to Claim 1, wherein the fluoro-oil is a perfluoropolyether, represented by the following general formula :
PfO(CF2O)x(C2F4O)y(C3F6O)zRf' [I]
(where Rf and Rf' are the same or different perfluoroalkyl groups having 1-5 carbon atoms, x+y+z is 3-200, and x and y may be zero), or a perfluoropolyether, represented by the following general formula :
F(CF2CF2CF2O)nC2F5 [II]
(where n is an integer of 2-100). - A lubricant composition according to Claim 2, wherein the perfluoropolyether represented by the general formula [I] is at least one of perfluoropolyethers represented by the following general formulae :
(1) RfO(CF2CF2O)m(CF2O)nRf
(where m+n=3-200, m:n=10-90:90-10, and the CF2CF2O group and the CF2O group are in random combination in the main chain),
(2) RfO[CF(CF3)CF2O]p(CF2CF2O)q(CF2O)rRf
(where p+q+r=3-200, q and r may be zero, (q+r)/p=0-2:1, and the CF(CF3)CF2O group, the CF2CF2O group, and the CF2O group are in random com-bination in the main chain), and
(3) RfO[CF(CF3)CF2O]s(CF2CF2O)tRf
(where s+t=2-200, t may be zero, t/s=0-2:1, and the CF(CF3)CF2O group and the CF2CF2O group are in random combination in the main chain). - A lubricant composition according to Claim 1, wherein another thickener is further contained.
- A lubricant composition according to Claim 2, wherein another thickener is further contained.
- A lubricant composition according to Claim 3, wherein another thickener is further contained.
- A lubricant composition according to Claim 1, for use as a grease.
- A lubricant composition according to Claim 2, for use as a grease.
- A lubricant composition according to Claim 3, for use as a grease.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005061811A JP4810842B2 (en) | 2005-03-07 | 2005-03-07 | Lubricant composition |
PCT/JP2006/304051 WO2006095644A1 (en) | 2005-03-07 | 2006-03-03 | Lubricant composition |
Publications (4)
Publication Number | Publication Date |
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EP1764407A1 true EP1764407A1 (en) | 2007-03-21 |
EP1764407A8 EP1764407A8 (en) | 2007-07-04 |
EP1764407A4 EP1764407A4 (en) | 2011-12-21 |
EP1764407B1 EP1764407B1 (en) | 2015-06-10 |
Family
ID=36953244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP06715134.0A Active EP1764407B1 (en) | 2005-03-07 | 2006-03-03 | Use of lubricant compositions for lubrication of bearings |
Country Status (4)
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US (1) | US20090270292A1 (en) |
EP (1) | EP1764407B1 (en) |
JP (1) | JP4810842B2 (en) |
WO (1) | WO2006095644A1 (en) |
Cited By (3)
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WO2009027428A2 (en) * | 2007-08-28 | 2009-03-05 | Shell Internationale Research Maatschappij B.V. | Lubricating composition comprising fluorine oil and tricalcium phosphate |
EP2039742A1 (en) * | 2006-07-05 | 2009-03-25 | Kyodo Yushi Co., Ltd. | Grease composition and bearing |
CN105524697A (en) * | 2016-01-21 | 2016-04-27 | 纳拓润滑技术(上海)有限公司 | Automobile seat sliding rail lubrication grease and preparation method thereof |
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JP2007092012A (en) * | 2005-09-02 | 2007-04-12 | Ntn Corp | Lubricating grease and lubricating grease-filled roller bearing |
US8182155B2 (en) | 2005-09-02 | 2012-05-22 | Ntn Corporation | Lubricating grease and lubricating grease-enclosed roller bearing |
JP5145696B2 (en) * | 2006-11-13 | 2013-02-20 | 日本精工株式会社 | Rolling device |
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JP7273639B2 (en) * | 2019-07-18 | 2023-05-15 | デュポン・東レ・スペシャルティ・マテリアル株式会社 | Lubricant composition |
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US8853140B2 (en) | 2006-07-05 | 2014-10-07 | Kyodo Yushi Co., Ltd. | Grease composition and bearing |
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CN105524697A (en) * | 2016-01-21 | 2016-04-27 | 纳拓润滑技术(上海)有限公司 | Automobile seat sliding rail lubrication grease and preparation method thereof |
CN105524697B (en) * | 2016-01-21 | 2018-08-10 | 纳拓润滑技术江苏有限公司 | A kind of sliding rail of automobile seat lubricating grease and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
EP1764407A4 (en) | 2011-12-21 |
EP1764407A8 (en) | 2007-07-04 |
JP2006241386A (en) | 2006-09-14 |
US20090270292A1 (en) | 2009-10-29 |
JP4810842B2 (en) | 2011-11-09 |
WO2006095644A1 (en) | 2006-09-14 |
EP1764407B1 (en) | 2015-06-10 |
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