CA2157425A1 - Lubricant composition - Google Patents
Lubricant compositionInfo
- Publication number
- CA2157425A1 CA2157425A1 CA002157425A CA2157425A CA2157425A1 CA 2157425 A1 CA2157425 A1 CA 2157425A1 CA 002157425 A CA002157425 A CA 002157425A CA 2157425 A CA2157425 A CA 2157425A CA 2157425 A1 CA2157425 A1 CA 2157425A1
- Authority
- CA
- Canada
- Prior art keywords
- group
- weight
- composition
- content
- sulfide
- 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.)
- Abandoned
Links
- 239000000314 lubricant Substances 0.000 title claims abstract description 51
- 239000000203 mixture Substances 0.000 title claims abstract description 48
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 28
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052796 boron Inorganic materials 0.000 claims abstract description 24
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 21
- 239000011701 zinc Substances 0.000 claims abstract description 21
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000003599 detergent Substances 0.000 claims abstract description 16
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011593 sulfur Substances 0.000 claims abstract description 13
- 150000003464 sulfur compounds Chemical class 0.000 claims abstract description 12
- 239000002199 base oil Substances 0.000 claims abstract description 11
- 229960002317 succinimide Drugs 0.000 claims abstract description 9
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 7
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000012990 dithiocarbamate Substances 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 239000011733 molybdenum Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 6
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 24
- 125000004432 carbon atom Chemical group C* 0.000 claims description 21
- -1 olefin sulfide Chemical class 0.000 claims description 14
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 claims description 8
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000010698 whale oil Substances 0.000 claims description 6
- 125000004429 atom Chemical group 0.000 claims description 5
- 235000021323 fish oil Nutrition 0.000 claims description 5
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 3
- AVVIDTZRJBSXML-UHFFFAOYSA-L calcium;2-carboxyphenolate;dihydrate Chemical compound O.O.[Ca+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O AVVIDTZRJBSXML-UHFFFAOYSA-L 0.000 claims description 3
- ZMRQTIAUOLVKOX-UHFFFAOYSA-L calcium;diphenoxide Chemical compound [Ca+2].[O-]C1=CC=CC=C1.[O-]C1=CC=CC=C1 ZMRQTIAUOLVKOX-UHFFFAOYSA-L 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- MQHWFIOJQSCFNM-UHFFFAOYSA-L Magnesium salicylate Chemical compound [Mg+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O MQHWFIOJQSCFNM-UHFFFAOYSA-L 0.000 claims 1
- 229960005069 calcium Drugs 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 229940072082 magnesium salicylate Drugs 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 36
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 229910019142 PO4 Inorganic materials 0.000 abstract description 2
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 239000010452 phosphate Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 15
- 235000019198 oils Nutrition 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 125000002960 margaryl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000002480 mineral oil Substances 0.000 description 4
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 125000002889 tridecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 125000004119 disulfanediyl group Chemical group *SS* 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- GVPWHKZIJBODOX-UHFFFAOYSA-N dibenzyl disulfide Chemical compound C=1C=CC=CC=1CSSCC1=CC=CC=C1 GVPWHKZIJBODOX-UHFFFAOYSA-N 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 238000006317 isomerization reaction Methods 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-M salicylate Chemical compound OC1=CC=CC=C1C([O-])=O YGSDEFSMJLZEOE-UHFFFAOYSA-M 0.000 description 2
- 229960001860 salicylate Drugs 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- XIUROWKZWPIAIB-UHFFFAOYSA-N sulfotep Chemical compound CCOP(=S)(OCC)OP(=S)(OCC)OCC XIUROWKZWPIAIB-UHFFFAOYSA-N 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- JBIJLHTVPXGSAM-UHFFFAOYSA-N 2-naphthylamine Chemical compound C1=CC=CC2=CC(N)=CC=C21 JBIJLHTVPXGSAM-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
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 241001435619 Lile Species 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PGAXJQVAHDTGBB-UHFFFAOYSA-N dibutylcarbamothioylsulfanyl n,n-dibutylcarbamodithioate Chemical compound CCCCN(CCCC)C(=S)SSC(=S)N(CCCC)CCCC PGAXJQVAHDTGBB-UHFFFAOYSA-N 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000008301 phosphite esters Chemical class 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
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920001522 polyglycol ester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 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
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, 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
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
- C10M133/52—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of 30 or more atoms
- C10M133/56—Amides; Imides
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/02—Sulfurised compounds
- C10M135/04—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/02—Sulfurised compounds
- C10M135/06—Esters, e.g. fats
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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Abstract
A lubricant composition comprising a major amount of a lubricant base oil, and a minor amount of additives comprising (A) oxymolybdenum dithiocarbamate sulfide having a specific structure, (B) zinc dialkyldithio-phosphate having a specific structure, and (C) a sulfur compound having a specific structure, (D) a metal cleansing agent, and (E) boron containing succinimide, wherein to the total weight of the composition, the molybdenum content from oxymolybdenum dithiocarbamate sulfide is at 200 to 2,000 ppm;
the phosphorous content from zinc dialkyldithiophosphate is at 0.02 to 0.15 %
by weight; the sulfur content from sulfur compounds is at 0.02 to 0.30 % by weight; the content of a metal cleansing agent is at 1 to 10 % by weight; and the boron content from boron containing succinimide is at 0.005 to 0.06 % by weight.
The lubricant composition of the present invention with excellent low abrasion property can sustain good friction properties while exhibiting resistance to oxidation at higher temperatures in the presence of gaseous nitrogen oxides. The lubricant composition of the present invention is used preferably as lubricants for internal combustion engines, automatic transmission, snubbers, and power steering, more preferably as lubricants for internal combustion engines in particular.
the phosphorous content from zinc dialkyldithiophosphate is at 0.02 to 0.15 %
by weight; the sulfur content from sulfur compounds is at 0.02 to 0.30 % by weight; the content of a metal cleansing agent is at 1 to 10 % by weight; and the boron content from boron containing succinimide is at 0.005 to 0.06 % by weight.
The lubricant composition of the present invention with excellent low abrasion property can sustain good friction properties while exhibiting resistance to oxidation at higher temperatures in the presence of gaseous nitrogen oxides. The lubricant composition of the present invention is used preferably as lubricants for internal combustion engines, automatic transmission, snubbers, and power steering, more preferably as lubricants for internal combustion engines in particular.
Description
2~ 425 I
BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to a novel lubricant composition.
More specifically, the present invention relates to a lubricant composition having good low abrasion property and low fiiction and being capable of sustaining low friction over a long period of time with no deterioration even in an ~ .u~
.g gaseous nitrogen oxides. The lublicant composition can be used preferal)ly for internal cnmhllctinn engines, automatic tr~ncmiccinn~ snubbers and power steering, particularly for intemal cnmbllctinn engines.
Description of the Related Art Lubricants have been used for smoot~ling the operation of internal c~mhllctjnn engines, driving systems such as automatic tr~ncmiccinn snubbers and power steering, and gear. Lubricants for intemal cnmhllc~inn engines in particular serve for cooling the inside of engines, for cleaning and dispersing cnmh-lctinn products and further for preventing rust and corrosion, other tham for Illhr~ in~ various sliding pauts such as piston ring and cylinder liner, bearing of crank aYis and cnnn~ctin~ rod, and valve operating parts including cam and valvelifter.
As internal combustion engines have been modified to acquire greater p~.r~ such as low fuel consumption and high power and the operability against severe operating conditions, recently, greater properties have been demanded for lubricants. In addition, combustion gas for internal combus-tion engines partly leaks in the form of blow-by-gas from between ~dle piston and the cylinder into the crank case. The cQmllllctinn gas contains higher levels ofgaseous rLitrogen oxides, which together witll oxygen in the blow-by-gas d~ Lt: the lubricants for internal combustion engines. The levels of gaseous nitrogen oxides leaking into the crank case tend to increase as engine p~lr~ demands increase. To prevent deterioration in an atmosphere ;,.g gaseous nitrogen oxides, w~lile retaining lubricity performance the lubricants are blended with various additives, for exaunple, wear preventillg agents, metal cleansing agents, ashless d~ llL~ and antioxidants.
21~7 425 Engine lubricating parts are mostly in the state of fluid lubrication, but vertical dead centers of valve operating systems and pistons are likely in the state of interface lubrication. In such state of interface lubrication, the wearV~ illg properties are generally provided by addillg zinc dithiopllo~ r Friction adjusting agents are also added to the lubricants as the CO~ rl ~ C; for the decrease in loss via friction and the decrease in fuel cost.As such friction adjusting agent, for example, an organic molybdenum com-pound, fatty acid ester, alkylamine and the like, are used in general.
After intensive investigations under such (,;Il,ullla~iulCC, it has been found that friction adjusting agents can exllibit the effect at the initial stage of use after their addition, but lose t~le effect when t~ley are oxidized and d~t~.;ula~d by dllllO~ ic oxygen, and that t~le decrease of the effect is distinctive in the presence of gaseous nitrogen oxides. Tllus, the present invention has been achieved for t~le pulpose of developing a lubricant composi-tion which can sustain the effect of decreasing friction in engines for a long period of titne in tlle presence of gaseous nittogen oxides.
SUMMARY OF THE INVENTION
It has been discovered tllat good lubricity and resistance to ~ptPri~rA~ n in the presence of oxygen and gaseous nitrogen oxides comprising a major amount of a lubricant base oil, and a minor amount of additives compris-ing specific individual ratios of oxymolybdenum dithiocarbamate sulfide having a specific alkyl group, zinc dialkylditlliop~lospllate having a specific alkyl group, one or more specific sulfur containing compounds, a specific metal cleansing agent at~d boron containing Sllrcinimi(l~ Tllus, the present invention has been achieved on the basis of the finding.
The present invention is a lubricant composition c~"",~ ;.,g a major atnount of a lubricant base oil, and a minor amount of additives compris-ing (A) oxymolybdenum dithio~ alllal~ sulfide having an alkyl group witil 8 to 18 carbon atoms, (B) zitlc dialkyldithiupl~o~,l,a~ having a plimary alkyl group with I to 18 carbon atoms, and (C) one or more sulfur compounds selected from the grollp consisting of zinc dialkyldithio.,~ba,l.a~e, copper dialkyldithio-carbamate or nickel dialkyldithio~dll,al-,at~, having am alkyl group with 2 to 18 carbon atoms, tetra-alkylthiuram disulfide having an âlkyl group with 2 to 18 carbon atoms, disulfide llaving an alkyl group Wit~l 2 to 18 carbon atoms, disulfide having an allyl group, an alkylallyl group or an allylalkyl group, with 6 to 18 carbon atoms, olefin sulfide, fisll oil sulfide and whale oil sulfide, (D) one or more metal cleansing agents selected from the gloup consisting of calcium salicylate, I~ salicylate, calcium sulfonate"..~ .. sulfonate and calcium phenate, and (E) boron containing s~ inimid~ wherein to the total weight of the composition, the molybdenum content from oxymolybdenum d;llllOcallJdlllàle sulfide is at 200 to 2,000 ppm (ratio by weight); the phos-phorous content from zinc dialkyldithh,~ o~,l,a~ is at 0 02 to 0.15 % by weight;the sulfur content from sulfur compounds is at 0.02 to 0.30 % by weight; the content of a metal cleansing agent is at I to 10 % by weigllt; and the boron content from boron containing sllccinimid~ is at 0.005 to 0.06 % by weight.
The present invention will be desclibed in details hereinbelow.
As the lubricant base oil to be used in the lubricant composition of the present invention, use may be made of t~lose base oils conventionally used, for example, mineral oils and syntlletic oils, witllout any specific limitation.
As such mineral oils, use may be made of raffinate produced by solvent pl-lifi~ion of a lubl icant raw material with an aromatic extraction solvent such as phenol and furfurâl, llydrogenation processed oils by hydro-genatioll processirlg witll a hydrogenation catalyst such as cobalt and molybdenum on the carrier silica-alumina, or mineral oils such as lubricant distillate produced by wax isomerization, for example, 60 Neutral Oil, 100 Neutral Oil, 150 Neutral Oil, 300 Neutral Oil, 500 Neutral Oil, and Brig~lt Stock.
Alternatively such synthetic oils include, for example, poly--olefin oligomer, polybutene, alkylbenzene, polyol ester, polyglycol ester, dibasic acid ester, phosphate ester, silicon oil and the like. These may be used singly or in cnn~llir~inn with two or more, or a mineral oil may be mixed with a syntheticoil for use.
~ 2157425 The base oil to be used in the lubricant composition of the present ir~vention has a viscosity at 100C in tlle lange of 3 to 20 cSt. Particularly, n~,C is given to a hydrogenation dcc~ ,o~ ion oil and a wax isomeriza-tion oil, with 3 % by weight or less of aromatic components, 50 ppm or less of sulfur c~ .l..., ....l~ and 50 ppm or less of nitrogen components.
As the oxymolybdenum dithio~dlbdllla~e sulfide to be blended with the lubricant C~lmrOCition of the present invention, use is made of a compound d by the general formula (1):
Rl S X X X S R3 whereill Rl, R2, R3 and R4 may be the same or differel-t, each ~ s~ g an aLkyl glOUp with 8 to 18 carbon atoms; and x represents S or O.
The alkyl group with 8 to 18 carbon atoms, I~IJles~ d by Rl, R2, R3 and R4 in the general formula (1), may be in a linear chain or in a branched chain. For the lubricant composition of the presellt invention, the carbon number of the alkyl group .~ s~llt~d by Rl, R2, R3 and R4 is most preferably 8 to 13.
Specific examples of the alkyl group, l~lese~ d by Rl, R2, R3 and R4, include octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group.
In the lubricant composition of the present invention, one species of oxymolybdenum dithio~alballld~e sulfide may be used or two or more species thereof may be used in combination. Furt}lelmore, oxymolybdenum dithio-carbamate sulfide is blended so that the molybdenum content from oxymolyb-denum dithiO.,~.lballla~ sulfide is at 200 to 2,000 ppm (ratio by weight), preferably 300 to 800 ppm (ratio by weight) to the total weight of the composi-tion. ~hen oxymolybdellum dit}liocalbamate sulfide is blended at an amount such that the molybdenum content fiom oxymolybdenum dithiocalballld~e ~ 21~7425 sulfide is below 200 ppm (ratio by weight) to tlle total weight of the composi-tion, the effect of improving the frictioll properties (low friction) is not ~q~jcfPrt~rily exllibited; and when oxymolybdenum dithiO~alballlale sulfide is blended at an amount such that tlle molybdenum content from oxymolybdenum dithiocu.bd~ lè sulfide is above 2,000 ppm (ratio by weight) to the total weightof tbe cnmrociti~n, the implovement of the effect is not observed in proportion to the amount, and sludge is likely to be caused.
As the zinc dialkyldithiophosphate to be blended with the lubricant C~ lul. of the present invention, use is made of a compound l~.r,s~;lllrd by the general formula (2):
R5{) S S ~R7 P~Zn--S--P (2) R6 o ~R8 wherein R5, R6, R7 and R8 may be the same or different, each l~JIC~ illg a primary alkyl group with I to 18 carbon atoms.
The primary alkyl group l~lr.~ rd by R5, R6, R7 and R8 in the general formula (2), may be in a linear chain or in a branclled chain, includingfor example methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl grûup, octyl group, nonyl group, decyl gloup, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group. In the lubricant c~-mrocition of the present invention, preferably, use may be made of zinc dialkyldithiophosphate having a primary alkyl group Witll 3 to 12 carbon atoms.
In the lubricant composition in a~uldd,l~ with tlle present inven-tion, zinc dialkyl~lithi~ c~ lr is blended so that the phosphorous content from ZUIC dialkyldithiu~llo~ .t~ is at 0.02 to 0.15 % by weight, preferably 0.04to 0.12 % by weight to the total weight of tlle composition. When zinc dialkyl-,1ithir~ r is blended at an amount such that the pllospilorous content from zinc dialkyldithiophosphate is below 0.02 % by weight to the total weight of thecrmro~i~ic\n, the resulting composition cannot get satisfactory wearability or 21~425 cannot get a small ~iu~ ir,.~ of friction Sa~ UI~ under the operation conditions of high oil ~ ld~Ul c and low-speed rotation; and when zinc dialkyl-1ith; .~ is blended at an amount such that the phosphorous content from zinc dialkylllithiu~ cuplldL~ is above 0.15 % by weight to ttle total weight of the composition, tlle improvement of the effect is not observed in proportion to the amount.
As the dialkylditlliûcaubamate salt to be blended in the lubricant composition of the present invention, use is made of a compound l~ ,d by the general formula (3) \ ~M~--N / (3) R10/ \R12 wherein M represents zinc, copper or nickel; R9, R10, Rl I and R12 may be the same or different, each IC,UlC lrlllillg an alkyl group with 2 to 18 carbon atoms.
The alkyl group of 2-18 carbon atoms I C,UI cs~llLcd by R9, R10, Rl ' and R12 in the general formula (3) may be in a linear chain or in a branched chain, including for example ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, lleptyl group, octyl group, nonyl group, decylgroup, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl glOUp and octadecyl group As the tetla-alkyltlliurarn disolflde to be blended in the lubricant composition of the present invention, ~Ise may be made of a compound -c~c.ll~d by the general formula (4):
N ~--5 (4) wherein R13, R14, R15 and R16 may be tlle same or different, each ICpl~sc,l~illgan alkyl group with 2 to 18 caubon atoms.
~ 21~7425 The alkyl group of 2-8 carbon atoms represented by R13, R14, R15 and R16 in the general folmula (4) may be in a linear chain or in a branchedchain, iulcluding for example ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group.
As the disulfide to be blended in the lubricant c~mro~i~ion of the present invention, use is made of a compound ~ s~ d by the general formula (5):
Rl 7--S--S--Rl 8 wherein R17 and R18 may be tlle same or diffelent, each l~ S~ .g an alkyl group with 2 to 18 carbon atoms or an allyl group, an alkylallyl group or an allylalkyl group, with 6 to 18 caubon atoms.
The alkyl group of 2-8 calbon atoms .~ s~--t~d by R17 and R18 in the general formula (5) may be in a linear c~lain or in a branched chain, including for example etllyl group, propyl glOUp, butyl gloup, pentyl group, hexyl group, lleptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, hidecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group; the allyl group, the alkylallyl group or the allylalkyl group, ~aving 6 to 18 carbon atoms and being represented by R17 and R18, includes for example phenyl group, benzyl group, phenetyl group, metllylbenzyl group, diphenylmet}lyl group and the like.
Olefin sulfide, fish oil sulfide and whale oil sulfide, to be blended with the lubricant composition of the present invention, should be olefin sulfide (polysulfide) being produced by sulfide processing of polymers such as iso-butylene and llaving a sulfur content of Z5 to 40 % by weight, fish oil sulfide and whale oil sulfide produced by plocessing individually fish oil and whale oil in the same manner.
21a742a In the lubricant composition of the present invention, dialkyldithio-carbamate represented by tlle general folmula (3), tetla-alkylthiuram disulfide s,~ d by the general formula (4), disulfide represented by the general formula (5), olefin sulfide, fish oil sulfide and whale oil sulfide, may be usedsingly or in combination of two or more thereof. These sulfur compounds may be blended so that the sulfur content derived from these sulfur compounds is 0.02 to 0.30 % by weight. When these sulfur comro~n~ are blended at an amoumt such that the sulfur content from these sulfur compounds is below 0.02 % by weight to the total weight of the composition, the effect of sustaining friction decrease is incl~ nt, wllen these sulfur compounds are blended at an amount such that the sulfur content from these sulfur compounds is above 0.30 % by weight to the total weight of t}le composition, the improvement of theeffect cannot be brought about in proportion to tlle amount.
If desired, one or two or more metal cleansing agents selected from the group consisting of calcium salicylate, IIIAg,ll~;lllll salicylate, calcium sulfonate, IIIA~ 11 sulfonate, and calcium phenate may be blended with the lubricant cnmro~ihnn of the present invention. These metal cleansing agents may be blended at I to 10 % by weight to the total weight of the composition.
When tllese metal cleansing agents al-e blellded below I % by weight to the total weight of the composition, the cleansing effect is unsatisfactory; when these metal cleansing agents are blended above 10 /0 by weigllt to the total weight of the cnmro~itinn~ the improvement of the effect cannot be observed in proportion to the a~nount, or rather, asll content may increase.
For the lubricant composition of the plesent invelltion, the total base value of the comro~itinn may be pleferably 3 to 10, more preferably 4 to 7.The total base value can be measured according to JIS K250 1. T~le total base value can be adjusted preferably by selecting a metal cleansing agent with an d~ .t~ base value.
If desired, boron containing s~cinimi(lf may be blended with tlle lubricant composition of the present invention.
The ratio of tlle number of boroll atoms/the number of nitrogen atoms ill tlle boron containing succinimide to be used in the lubricant composi-g tion of the present invention is 0.05 to 1.5, preferably 0.1 to 0.8. If the ratio oftbe number of boron atomslthe number of nitrogen atoms is l~elow 0.05, r~ " improvement of *iction properties (low friction) cannot be brought about; if the ratio of the number of boron atomslthe number of nitrogen atoms isabove 1.5, friction properties are deteriorated.
In the lubricant composition of tlle present invention, tlle boron cnnt~inin~ 5~ inimi~1~P should be blended at an amount such tllat the boron content from boron containing s~ inimidP is at 0.005 to 0.06 % by weight, preferably 0.01 to 0.04 % by weigllt to the total weight of the cornrocition When tlle boron containing succinimide is blended at an amount such that the boron content from boron containing succinimide is below 0.005 % by weight to the total weight of the composition, no ~ali~r~ ol~ improvement of friction properties (low friction) can be brought about; if the boron containing s~rrinirni~lP is blended at an amount such that the boroll content from boron c~ ;..;,.g sl-rl inimi~P is above 0.0G % by weight to the total weight of the ~mrocitinn, no improvement of tlle effect can be brought about in proportion to the amount.
In a range without depalting fi om the scope of the present inven-tion, vauious additives conventionally used for lubricants, for example, other friction adjusting agents, other metal cleansing agents, other wear preventing agents, other ashless di~ L~ antioxidants, viscosity index improvers, pour point dc~ lg agents, anti-foaming agents, rust preventive agents, and corrosicn inhibitors, may be blended in tlle lubricant composition of tlle present invention.
Other fiiction adjusting agents include for example polyhydric alcohol partial ester, amine, amide, sulfide ester and tlle like.
Other metal cleansing agents include for example barium sulfonate, barium phenate and the like, which may be used generally at a ratio of 0.1 to 5 % by weight.
21574~5 Other wear preventing agents include for example thioph~sph~t( metal sait, sulfur compound, p~losphate ester, phosphite ester and the like, which may be used generally at a ratio of 0.05 to 5.0 % by weigllt.
Other ashless di~ a~ include for example succinimide, s~ inol~iAp~ benzylamine, ester and the like, which may be used generally at a ratio of 0.5 to 7 % by weight.
Antioxi~ntc include for example amine antioxidants such as aikylated diphenylamine, phenyl-a-naphthylamine, and alkyiated a-naphthyl-amine; and phenol ~ntioXirl~nt~ such as 2,6-di-t-butyl-4-methyl phenol and 4,4'-methylene-bis(2,6-di-t-butyl phenol), which may be used generally at a ratio of 0.05 to 4 % by weight.
Viscosity index improvers include for example polymethacrylates, polyisobutylenes, ethylene-propylene copolymers, styrene-butadiene llydro-genated copolymers and tlle like, which may be used generally at a ratio of 0.5 to 35 % by weight.
Pour point decreasing agents include for example polyalkyl-methacrylate, ~hlorin:ltcd paraffin-napllthalene condensed product, alkylated polystyrene and the like.
Anti-foaming agents include for example dimethylpolysiloxane, polyacrSIlic acid and the like.
Rust preventing agents include for example fatty acid, alkenyl-succinate partial ester, fatty acid soap, alkylsulfonate salt, fatty acid polyhydric aicohol ester, fatty acid amine, paraffin oxide, alkylpolyoxyethylene ether and the like.
Corrosion inilibitors include for example benzotriazole and benzoimidazole.
21~7~25 I ~
DESCRIPTION OF THE PREFERRED EMBQDIMENT
The present invention will now be explained in detail in examples, but the invention is not limited to these examples.
Herein, tlle eoPffiei~nt of fiiction of the lubrieant eomrr~cition was measured at a 50-Hz frequency, a 3 mm amplitude, a 25-N load, a ~ d~UI~ of 80C and a testing period of 25 minutes, using a reciprocate dynamic sliding fiietion tester (SRV frietion tester).
The oxidation test by means of air containing gaseous nitrogen oxides was carlied out using a 150 ml test oil at a ~ lalul~ of 130C, a nitrogen oxide level of I % by volume, a flow of 2 liters/hour, and a testing period of 8 ~lours.
Examples I to 9 and Comparative Examples I and 2 Examples I to 9 au-e lubricant compositions blended with (A) oxymolybdenum dithiocarbamate sulfide, (B) zinc dialkyldithiophocrh~t~, (C) zinc dialkyldithiOca l,allla~, copper dialkyldithio~,all)all~a~, tetrabutylthiuram disulfide or dibenzyldisulfide, (D) calcium sâlicylate, and (E) boron er~nt~inin~
sllrrinin~ r Furthermore, Comparative Examples I and 2 are lubricant erln~rrJcitionc eontaining the ,o."l,r~ (A), (B), (D) and (E), without eontaining the eomponent (C).
Individual components of a type and an amount shown in Table I
were blended with the base oil ( 100 Neutral Oil with a viscosity of 4.4 mm/s2 at 100C) to prepaue lublicant compositions containing tlle components, and the eo~offiri~nt of friction ;~ t~ ly after the preparation was measured, together with the corffi~i~ nt of fiiction after the pleparations were stored and oxidized in the presence of gaseous nitrogen oxides at 130C for 8 llours. Tlle results are shown iUI Table 1.
All the lublicant compositions of Exâmples I to 9 all have good fiiction properties with low coefficients of friction. No change in the coeffi-cients of fiietion was observed even âftel tlle lubricant compositions were heâted 21~2~
in the p,resence of gaseous nitrogen oxides at 1 30C for 8 ~lours. Thus, it is indicted that these lubricant compositions have good resistance to oxidation with no change in the observed col-fficif-nlc of friction. Altematively, the lubricant compositions of Comparative Examples I and 2, without containing the CUIII~ (C), i.e., a sulfur compound, }lave low coefficients of friction f ~ rly after preparation, but have acquired higller cof-ffif if-n~c of frictionafter the preparations were heated and oxidized in the presence of gaseous nitrogen oxides at 130C for 8 hours, indicating that their resistance to oxidation is poor.
The lubricant composition of tlle plesent invention llas acquired good low abrasion property, throug}l the blellding of a lubricant base oil witl oxymolybdenum ditlliO,,a.l,a.llal~ sulfide, zinc dialkyldithio~ r, and a sulfur cnmro-lnfl, each having a specific structure, a metal cleansing agent andboron cf ntRinin~ Sllf cinimidf Tlle compositioll can sustain good fiiction properties (low friction) while exhibiting resistance to oxidation at higher dlUI~ in the presence of gaseous nitrogen oxides, and is preferably used as lubricants for intemal combustion engines, automatic trRncmiccinn~ snubbers, and power steering, preferably for internal cf~ml-llc~ion engines in particular.
21~742~
` o ~ X , O
~o o C~ CO
C~ ~o ~ cr~ X
CO ~ -- _ ~ o X X
~ o -- `~ o, o o ` ~D -- ~
~o o _ ~ o '~ ~ ' ` o o C'i CO o o o ~ X . j, ~O O c, ~ O r` -- ~ ~
-- -- -- ~ X - -a~ , . , ., ~
C
,, _~ ~ X _ co v~ g - '~.~ s ,- t ~ ~Li ,C_ j~ V. J~ , V~ C ~_ ~ C ~ z
BACKGROUND OF THE INVENTION
Field of the Invention The present invention relates to a novel lubricant composition.
More specifically, the present invention relates to a lubricant composition having good low abrasion property and low fiiction and being capable of sustaining low friction over a long period of time with no deterioration even in an ~ .u~
.g gaseous nitrogen oxides. The lublicant composition can be used preferal)ly for internal cnmhllctinn engines, automatic tr~ncmiccinn~ snubbers and power steering, particularly for intemal cnmbllctinn engines.
Description of the Related Art Lubricants have been used for smoot~ling the operation of internal c~mhllctjnn engines, driving systems such as automatic tr~ncmiccinn snubbers and power steering, and gear. Lubricants for intemal cnmhllc~inn engines in particular serve for cooling the inside of engines, for cleaning and dispersing cnmh-lctinn products and further for preventing rust and corrosion, other tham for Illhr~ in~ various sliding pauts such as piston ring and cylinder liner, bearing of crank aYis and cnnn~ctin~ rod, and valve operating parts including cam and valvelifter.
As internal combustion engines have been modified to acquire greater p~.r~ such as low fuel consumption and high power and the operability against severe operating conditions, recently, greater properties have been demanded for lubricants. In addition, combustion gas for internal combus-tion engines partly leaks in the form of blow-by-gas from between ~dle piston and the cylinder into the crank case. The cQmllllctinn gas contains higher levels ofgaseous rLitrogen oxides, which together witll oxygen in the blow-by-gas d~ Lt: the lubricants for internal combustion engines. The levels of gaseous nitrogen oxides leaking into the crank case tend to increase as engine p~lr~ demands increase. To prevent deterioration in an atmosphere ;,.g gaseous nitrogen oxides, w~lile retaining lubricity performance the lubricants are blended with various additives, for exaunple, wear preventillg agents, metal cleansing agents, ashless d~ llL~ and antioxidants.
21~7 425 Engine lubricating parts are mostly in the state of fluid lubrication, but vertical dead centers of valve operating systems and pistons are likely in the state of interface lubrication. In such state of interface lubrication, the wearV~ illg properties are generally provided by addillg zinc dithiopllo~ r Friction adjusting agents are also added to the lubricants as the CO~ rl ~ C; for the decrease in loss via friction and the decrease in fuel cost.As such friction adjusting agent, for example, an organic molybdenum com-pound, fatty acid ester, alkylamine and the like, are used in general.
After intensive investigations under such (,;Il,ullla~iulCC, it has been found that friction adjusting agents can exllibit the effect at the initial stage of use after their addition, but lose t~le effect when t~ley are oxidized and d~t~.;ula~d by dllllO~ ic oxygen, and that t~le decrease of the effect is distinctive in the presence of gaseous nitrogen oxides. Tllus, the present invention has been achieved for t~le pulpose of developing a lubricant composi-tion which can sustain the effect of decreasing friction in engines for a long period of titne in tlle presence of gaseous nittogen oxides.
SUMMARY OF THE INVENTION
It has been discovered tllat good lubricity and resistance to ~ptPri~rA~ n in the presence of oxygen and gaseous nitrogen oxides comprising a major amount of a lubricant base oil, and a minor amount of additives compris-ing specific individual ratios of oxymolybdenum dithiocarbamate sulfide having a specific alkyl group, zinc dialkylditlliop~lospllate having a specific alkyl group, one or more specific sulfur containing compounds, a specific metal cleansing agent at~d boron containing Sllrcinimi(l~ Tllus, the present invention has been achieved on the basis of the finding.
The present invention is a lubricant composition c~"",~ ;.,g a major atnount of a lubricant base oil, and a minor amount of additives compris-ing (A) oxymolybdenum dithio~ alllal~ sulfide having an alkyl group witil 8 to 18 carbon atoms, (B) zitlc dialkyldithiupl~o~,l,a~ having a plimary alkyl group with I to 18 carbon atoms, and (C) one or more sulfur compounds selected from the grollp consisting of zinc dialkyldithio.,~ba,l.a~e, copper dialkyldithio-carbamate or nickel dialkyldithio~dll,al-,at~, having am alkyl group with 2 to 18 carbon atoms, tetra-alkylthiuram disulfide having an âlkyl group with 2 to 18 carbon atoms, disulfide llaving an alkyl group Wit~l 2 to 18 carbon atoms, disulfide having an allyl group, an alkylallyl group or an allylalkyl group, with 6 to 18 carbon atoms, olefin sulfide, fisll oil sulfide and whale oil sulfide, (D) one or more metal cleansing agents selected from the gloup consisting of calcium salicylate, I~ salicylate, calcium sulfonate"..~ .. sulfonate and calcium phenate, and (E) boron containing s~ inimid~ wherein to the total weight of the composition, the molybdenum content from oxymolybdenum d;llllOcallJdlllàle sulfide is at 200 to 2,000 ppm (ratio by weight); the phos-phorous content from zinc dialkyldithh,~ o~,l,a~ is at 0 02 to 0.15 % by weight;the sulfur content from sulfur compounds is at 0.02 to 0.30 % by weight; the content of a metal cleansing agent is at I to 10 % by weigllt; and the boron content from boron containing sllccinimid~ is at 0.005 to 0.06 % by weight.
The present invention will be desclibed in details hereinbelow.
As the lubricant base oil to be used in the lubricant composition of the present invention, use may be made of t~lose base oils conventionally used, for example, mineral oils and syntlletic oils, witllout any specific limitation.
As such mineral oils, use may be made of raffinate produced by solvent pl-lifi~ion of a lubl icant raw material with an aromatic extraction solvent such as phenol and furfurâl, llydrogenation processed oils by hydro-genatioll processirlg witll a hydrogenation catalyst such as cobalt and molybdenum on the carrier silica-alumina, or mineral oils such as lubricant distillate produced by wax isomerization, for example, 60 Neutral Oil, 100 Neutral Oil, 150 Neutral Oil, 300 Neutral Oil, 500 Neutral Oil, and Brig~lt Stock.
Alternatively such synthetic oils include, for example, poly--olefin oligomer, polybutene, alkylbenzene, polyol ester, polyglycol ester, dibasic acid ester, phosphate ester, silicon oil and the like. These may be used singly or in cnn~llir~inn with two or more, or a mineral oil may be mixed with a syntheticoil for use.
~ 2157425 The base oil to be used in the lubricant composition of the present ir~vention has a viscosity at 100C in tlle lange of 3 to 20 cSt. Particularly, n~,C is given to a hydrogenation dcc~ ,o~ ion oil and a wax isomeriza-tion oil, with 3 % by weight or less of aromatic components, 50 ppm or less of sulfur c~ .l..., ....l~ and 50 ppm or less of nitrogen components.
As the oxymolybdenum dithio~dlbdllla~e sulfide to be blended with the lubricant C~lmrOCition of the present invention, use is made of a compound d by the general formula (1):
Rl S X X X S R3 whereill Rl, R2, R3 and R4 may be the same or differel-t, each ~ s~ g an aLkyl glOUp with 8 to 18 carbon atoms; and x represents S or O.
The alkyl group with 8 to 18 carbon atoms, I~IJles~ d by Rl, R2, R3 and R4 in the general formula (1), may be in a linear chain or in a branched chain. For the lubricant composition of the presellt invention, the carbon number of the alkyl group .~ s~llt~d by Rl, R2, R3 and R4 is most preferably 8 to 13.
Specific examples of the alkyl group, l~lese~ d by Rl, R2, R3 and R4, include octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group.
In the lubricant composition of the present invention, one species of oxymolybdenum dithio~alballld~e sulfide may be used or two or more species thereof may be used in combination. Furt}lelmore, oxymolybdenum dithio-carbamate sulfide is blended so that the molybdenum content from oxymolyb-denum dithiO.,~.lballla~ sulfide is at 200 to 2,000 ppm (ratio by weight), preferably 300 to 800 ppm (ratio by weight) to the total weight of the composi-tion. ~hen oxymolybdellum dit}liocalbamate sulfide is blended at an amount such that the molybdenum content fiom oxymolybdenum dithiocalballld~e ~ 21~7425 sulfide is below 200 ppm (ratio by weight) to tlle total weight of the composi-tion, the effect of improving the frictioll properties (low friction) is not ~q~jcfPrt~rily exllibited; and when oxymolybdenum dithiO~alballlale sulfide is blended at an amount such that tlle molybdenum content from oxymolybdenum dithiocu.bd~ lè sulfide is above 2,000 ppm (ratio by weight) to the total weightof tbe cnmrociti~n, the implovement of the effect is not observed in proportion to the amount, and sludge is likely to be caused.
As the zinc dialkyldithiophosphate to be blended with the lubricant C~ lul. of the present invention, use is made of a compound l~.r,s~;lllrd by the general formula (2):
R5{) S S ~R7 P~Zn--S--P (2) R6 o ~R8 wherein R5, R6, R7 and R8 may be the same or different, each l~JIC~ illg a primary alkyl group with I to 18 carbon atoms.
The primary alkyl group l~lr.~ rd by R5, R6, R7 and R8 in the general formula (2), may be in a linear chain or in a branclled chain, includingfor example methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl grûup, octyl group, nonyl group, decyl gloup, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group. In the lubricant c~-mrocition of the present invention, preferably, use may be made of zinc dialkyldithiophosphate having a primary alkyl group Witll 3 to 12 carbon atoms.
In the lubricant composition in a~uldd,l~ with tlle present inven-tion, zinc dialkyl~lithi~ c~ lr is blended so that the phosphorous content from ZUIC dialkyldithiu~llo~ .t~ is at 0.02 to 0.15 % by weight, preferably 0.04to 0.12 % by weight to the total weight of tlle composition. When zinc dialkyl-,1ithir~ r is blended at an amount such that the pllospilorous content from zinc dialkyldithiophosphate is below 0.02 % by weight to the total weight of thecrmro~i~ic\n, the resulting composition cannot get satisfactory wearability or 21~425 cannot get a small ~iu~ ir,.~ of friction Sa~ UI~ under the operation conditions of high oil ~ ld~Ul c and low-speed rotation; and when zinc dialkyl-1ith; .~ is blended at an amount such that the phosphorous content from zinc dialkylllithiu~ cuplldL~ is above 0.15 % by weight to ttle total weight of the composition, tlle improvement of the effect is not observed in proportion to the amount.
As the dialkylditlliûcaubamate salt to be blended in the lubricant composition of the present invention, use is made of a compound l~ ,d by the general formula (3) \ ~M~--N / (3) R10/ \R12 wherein M represents zinc, copper or nickel; R9, R10, Rl I and R12 may be the same or different, each IC,UlC lrlllillg an alkyl group with 2 to 18 carbon atoms.
The alkyl group of 2-18 carbon atoms I C,UI cs~llLcd by R9, R10, Rl ' and R12 in the general formula (3) may be in a linear chain or in a branched chain, including for example ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, lleptyl group, octyl group, nonyl group, decylgroup, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl glOUp and octadecyl group As the tetla-alkyltlliurarn disolflde to be blended in the lubricant composition of the present invention, ~Ise may be made of a compound -c~c.ll~d by the general formula (4):
N ~--5 (4) wherein R13, R14, R15 and R16 may be tlle same or different, each ICpl~sc,l~illgan alkyl group with 2 to 18 caubon atoms.
~ 21~7425 The alkyl group of 2-8 carbon atoms represented by R13, R14, R15 and R16 in the general folmula (4) may be in a linear chain or in a branchedchain, iulcluding for example ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group.
As the disulfide to be blended in the lubricant c~mro~i~ion of the present invention, use is made of a compound ~ s~ d by the general formula (5):
Rl 7--S--S--Rl 8 wherein R17 and R18 may be tlle same or diffelent, each l~ S~ .g an alkyl group with 2 to 18 carbon atoms or an allyl group, an alkylallyl group or an allylalkyl group, with 6 to 18 caubon atoms.
The alkyl group of 2-8 calbon atoms .~ s~--t~d by R17 and R18 in the general formula (5) may be in a linear c~lain or in a branched chain, including for example etllyl group, propyl glOUp, butyl gloup, pentyl group, hexyl group, lleptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, hidecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group; the allyl group, the alkylallyl group or the allylalkyl group, ~aving 6 to 18 carbon atoms and being represented by R17 and R18, includes for example phenyl group, benzyl group, phenetyl group, metllylbenzyl group, diphenylmet}lyl group and the like.
Olefin sulfide, fish oil sulfide and whale oil sulfide, to be blended with the lubricant composition of the present invention, should be olefin sulfide (polysulfide) being produced by sulfide processing of polymers such as iso-butylene and llaving a sulfur content of Z5 to 40 % by weight, fish oil sulfide and whale oil sulfide produced by plocessing individually fish oil and whale oil in the same manner.
21a742a In the lubricant composition of the present invention, dialkyldithio-carbamate represented by tlle general folmula (3), tetla-alkylthiuram disulfide s,~ d by the general formula (4), disulfide represented by the general formula (5), olefin sulfide, fish oil sulfide and whale oil sulfide, may be usedsingly or in combination of two or more thereof. These sulfur compounds may be blended so that the sulfur content derived from these sulfur compounds is 0.02 to 0.30 % by weight. When these sulfur comro~n~ are blended at an amoumt such that the sulfur content from these sulfur compounds is below 0.02 % by weight to the total weight of the composition, the effect of sustaining friction decrease is incl~ nt, wllen these sulfur compounds are blended at an amount such that the sulfur content from these sulfur compounds is above 0.30 % by weight to the total weight of t}le composition, the improvement of theeffect cannot be brought about in proportion to tlle amount.
If desired, one or two or more metal cleansing agents selected from the group consisting of calcium salicylate, IIIAg,ll~;lllll salicylate, calcium sulfonate, IIIA~ 11 sulfonate, and calcium phenate may be blended with the lubricant cnmro~ihnn of the present invention. These metal cleansing agents may be blended at I to 10 % by weight to the total weight of the composition.
When tllese metal cleansing agents al-e blellded below I % by weight to the total weight of the composition, the cleansing effect is unsatisfactory; when these metal cleansing agents are blended above 10 /0 by weigllt to the total weight of the cnmro~itinn~ the improvement of the effect cannot be observed in proportion to the a~nount, or rather, asll content may increase.
For the lubricant composition of the plesent invelltion, the total base value of the comro~itinn may be pleferably 3 to 10, more preferably 4 to 7.The total base value can be measured according to JIS K250 1. T~le total base value can be adjusted preferably by selecting a metal cleansing agent with an d~ .t~ base value.
If desired, boron containing s~cinimi(lf may be blended with tlle lubricant composition of the present invention.
The ratio of tlle number of boroll atoms/the number of nitrogen atoms ill tlle boron containing succinimide to be used in the lubricant composi-g tion of the present invention is 0.05 to 1.5, preferably 0.1 to 0.8. If the ratio oftbe number of boron atomslthe number of nitrogen atoms is l~elow 0.05, r~ " improvement of *iction properties (low friction) cannot be brought about; if the ratio of the number of boron atomslthe number of nitrogen atoms isabove 1.5, friction properties are deteriorated.
In the lubricant composition of tlle present invention, tlle boron cnnt~inin~ 5~ inimi~1~P should be blended at an amount such tllat the boron content from boron containing s~ inimidP is at 0.005 to 0.06 % by weight, preferably 0.01 to 0.04 % by weigllt to the total weight of the cornrocition When tlle boron containing succinimide is blended at an amount such that the boron content from boron containing succinimide is below 0.005 % by weight to the total weight of the composition, no ~ali~r~ ol~ improvement of friction properties (low friction) can be brought about; if the boron containing s~rrinirni~lP is blended at an amount such that the boroll content from boron c~ ;..;,.g sl-rl inimi~P is above 0.0G % by weight to the total weight of the ~mrocitinn, no improvement of tlle effect can be brought about in proportion to the amount.
In a range without depalting fi om the scope of the present inven-tion, vauious additives conventionally used for lubricants, for example, other friction adjusting agents, other metal cleansing agents, other wear preventing agents, other ashless di~ L~ antioxidants, viscosity index improvers, pour point dc~ lg agents, anti-foaming agents, rust preventive agents, and corrosicn inhibitors, may be blended in tlle lubricant composition of tlle present invention.
Other fiiction adjusting agents include for example polyhydric alcohol partial ester, amine, amide, sulfide ester and tlle like.
Other metal cleansing agents include for example barium sulfonate, barium phenate and the like, which may be used generally at a ratio of 0.1 to 5 % by weight.
21574~5 Other wear preventing agents include for example thioph~sph~t( metal sait, sulfur compound, p~losphate ester, phosphite ester and the like, which may be used generally at a ratio of 0.05 to 5.0 % by weigllt.
Other ashless di~ a~ include for example succinimide, s~ inol~iAp~ benzylamine, ester and the like, which may be used generally at a ratio of 0.5 to 7 % by weight.
Antioxi~ntc include for example amine antioxidants such as aikylated diphenylamine, phenyl-a-naphthylamine, and alkyiated a-naphthyl-amine; and phenol ~ntioXirl~nt~ such as 2,6-di-t-butyl-4-methyl phenol and 4,4'-methylene-bis(2,6-di-t-butyl phenol), which may be used generally at a ratio of 0.05 to 4 % by weight.
Viscosity index improvers include for example polymethacrylates, polyisobutylenes, ethylene-propylene copolymers, styrene-butadiene llydro-genated copolymers and tlle like, which may be used generally at a ratio of 0.5 to 35 % by weight.
Pour point decreasing agents include for example polyalkyl-methacrylate, ~hlorin:ltcd paraffin-napllthalene condensed product, alkylated polystyrene and the like.
Anti-foaming agents include for example dimethylpolysiloxane, polyacrSIlic acid and the like.
Rust preventing agents include for example fatty acid, alkenyl-succinate partial ester, fatty acid soap, alkylsulfonate salt, fatty acid polyhydric aicohol ester, fatty acid amine, paraffin oxide, alkylpolyoxyethylene ether and the like.
Corrosion inilibitors include for example benzotriazole and benzoimidazole.
21~7~25 I ~
DESCRIPTION OF THE PREFERRED EMBQDIMENT
The present invention will now be explained in detail in examples, but the invention is not limited to these examples.
Herein, tlle eoPffiei~nt of fiiction of the lubrieant eomrr~cition was measured at a 50-Hz frequency, a 3 mm amplitude, a 25-N load, a ~ d~UI~ of 80C and a testing period of 25 minutes, using a reciprocate dynamic sliding fiietion tester (SRV frietion tester).
The oxidation test by means of air containing gaseous nitrogen oxides was carlied out using a 150 ml test oil at a ~ lalul~ of 130C, a nitrogen oxide level of I % by volume, a flow of 2 liters/hour, and a testing period of 8 ~lours.
Examples I to 9 and Comparative Examples I and 2 Examples I to 9 au-e lubricant compositions blended with (A) oxymolybdenum dithiocarbamate sulfide, (B) zinc dialkyldithiophocrh~t~, (C) zinc dialkyldithiOca l,allla~, copper dialkyldithio~,all)all~a~, tetrabutylthiuram disulfide or dibenzyldisulfide, (D) calcium sâlicylate, and (E) boron er~nt~inin~
sllrrinin~ r Furthermore, Comparative Examples I and 2 are lubricant erln~rrJcitionc eontaining the ,o."l,r~ (A), (B), (D) and (E), without eontaining the eomponent (C).
Individual components of a type and an amount shown in Table I
were blended with the base oil ( 100 Neutral Oil with a viscosity of 4.4 mm/s2 at 100C) to prepaue lublicant compositions containing tlle components, and the eo~offiri~nt of friction ;~ t~ ly after the preparation was measured, together with the corffi~i~ nt of fiiction after the pleparations were stored and oxidized in the presence of gaseous nitrogen oxides at 130C for 8 llours. Tlle results are shown iUI Table 1.
All the lublicant compositions of Exâmples I to 9 all have good fiiction properties with low coefficients of friction. No change in the coeffi-cients of fiietion was observed even âftel tlle lubricant compositions were heâted 21~2~
in the p,resence of gaseous nitrogen oxides at 1 30C for 8 ~lours. Thus, it is indicted that these lubricant compositions have good resistance to oxidation with no change in the observed col-fficif-nlc of friction. Altematively, the lubricant compositions of Comparative Examples I and 2, without containing the CUIII~ (C), i.e., a sulfur compound, }lave low coefficients of friction f ~ rly after preparation, but have acquired higller cof-ffif if-n~c of frictionafter the preparations were heated and oxidized in the presence of gaseous nitrogen oxides at 130C for 8 hours, indicating that their resistance to oxidation is poor.
The lubricant composition of tlle plesent invention llas acquired good low abrasion property, throug}l the blellding of a lubricant base oil witl oxymolybdenum ditlliO,,a.l,a.llal~ sulfide, zinc dialkyldithio~ r, and a sulfur cnmro-lnfl, each having a specific structure, a metal cleansing agent andboron cf ntRinin~ Sllf cinimidf Tlle compositioll can sustain good fiiction properties (low friction) while exhibiting resistance to oxidation at higher dlUI~ in the presence of gaseous nitrogen oxides, and is preferably used as lubricants for intemal combustion engines, automatic trRncmiccinn~ snubbers, and power steering, preferably for internal cf~ml-llc~ion engines in particular.
21~742~
` o ~ X , O
~o o C~ CO
C~ ~o ~ cr~ X
CO ~ -- _ ~ o X X
~ o -- `~ o, o o ` ~D -- ~
~o o _ ~ o '~ ~ ' ` o o C'i CO o o o ~ X . j, ~O O c, ~ O r` -- ~ ~
-- -- -- ~ X - -a~ , . , ., ~
C
,, _~ ~ X _ co v~ g - '~.~ s ,- t ~ ~Li ,C_ j~ V. J~ , V~ C ~_ ~ C ~ z
Claims (6)
1. A lubricant composition comprising a major amount of a lubricant base oil, and a minor amount of additives comprising (A) oxy-molybdenum dithiocarbamate sulfide having an alkyl group with 8 to 18 carbon atoms, (B) zinc dialkyldithiophosphate having a primary alkyl group with 1 to 18carbon atoms, and (C) one or more sulfur components selected from the group consisting of zinc dialkyldithiocarbamate, copper dialkyldithiocarbamate or nickel dialkyldithiocarbamate, having an alkyl group with 2 to 18 carbon atoms, tetra-alkylthiuram disulfide having an alkyl group with 2 to 18 carbon atoms, disulfide having an allyl group, an alkylallyl group or an allylalkyl group, with 6 to 18 carbon atoms, olefin sulfide, fish oil sulfide and whale oil sulfide, (D) one or more metal cleansing agents selected from the group consisting of calcium salicylate, magnesium salicylate, calcium sulfonate, magnesium sulfonate and calcium phenate, and (E) boron containing succinimide, wherein to the total weight of the composition, the molybdenum content from oxymolybdenum dithiocarbamate sulfide is at 200 to 2,000 ppm (ratio by weight); the phosphorous content from zinc dialkyldithiophosphate is at 0.02 to 0.15 % by weight; the sulfur content from sulfur compounds is at 0.02 to 0.30 % by weight;the content of a metal cleansing agent is at 1 to 10 % by weight; and the boron content from boron containing succinimide is at 0.005 to 0.06 % by weight.
2. The composition of claim 1 wherein the lubricating base oil has a viscosity at 100°C in the range of 3 to 20 mm/s2.
3. The composition of claim 2 wherein the lubricating base oil having 3 % by weight or less aromatic components, 50 ppm or less sulfur component and 50 ppm or less nitrogen components.
4. The composition of claim 1 wherein the oxymolybdenum dithiocarbamate is of the formula wherein R1, R2, R3 and R4 may be the same or different, each representing an alkyl group with 8 to 13 carbon atoms and X represents S or O.
5. The composition of claim 1 wherein the zinc dialkyldithiophosphate has primary alkyl groups with 3 to 12 carbon atoms.
6. The composition of claim 1 wherein the ratio of the number of boron atoms to the number of nitrogen atoms in the boron containing succinimide is 0.05 to 1.5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23228194 | 1994-09-01 | ||
| JP232281/94 | 1994-09-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2157425A1 true CA2157425A1 (en) | 1996-03-02 |
Family
ID=16936774
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002195475A Abandoned CA2195475A1 (en) | 1994-09-01 | 1995-08-31 | Lubricants with sustained fuel economy performance |
| CA002157425A Abandoned CA2157425A1 (en) | 1994-09-01 | 1995-09-01 | Lubricant composition |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002195475A Abandoned CA2195475A1 (en) | 1994-09-01 | 1995-08-31 | Lubricants with sustained fuel economy performance |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0778876A1 (en) |
| AU (1) | AU3230695A (en) |
| CA (2) | CA2195475A1 (en) |
| WO (1) | WO1996006904A1 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6063741A (en) * | 1994-09-05 | 2000-05-16 | Japan Energy Corporation | Engine oil composition |
| JP2971748B2 (en) * | 1994-09-05 | 1999-11-08 | 株式会社ジャパンエナジー | Engine oil composition |
| JPH08283762A (en) * | 1995-04-14 | 1996-10-29 | Tonen Corp | Lubricating oil composition |
| US6855675B1 (en) | 1995-05-24 | 2005-02-15 | Tonengeneral Sekiyu K.K. | Lubricating oil composition |
| EP0847435A4 (en) * | 1995-05-24 | 1999-06-23 | Exxon Research Engineering Co | Lubricating oil composition |
| WO1997008280A1 (en) * | 1995-08-30 | 1997-03-06 | Tonen Corporation | Lubricating oil composition |
| JP3556355B2 (en) * | 1995-10-11 | 2004-08-18 | 東燃ゼネラル石油株式会社 | Lubricating oil composition |
| JP3497952B2 (en) * | 1996-08-02 | 2004-02-16 | 東燃ゼネラル石油株式会社 | Lubricating oil composition |
| GB9624441D0 (en) * | 1996-11-25 | 1997-01-15 | Exxon Research Engineering Co | Fuel economy engine oil composition |
| CA2251418C (en) * | 1997-10-30 | 2007-08-14 | The Lubrizol Corporation | A method to improve cu corrosion performance of mo-dtc and active sulfur by adding sunflower oil |
| JP4641567B2 (en) | 1997-10-30 | 2011-03-02 | ザ ルブリゾル コーポレイション | Method to improve copper corrosion performance of molybdenum dithiocarbamate and active sulfur by adding sunflower oil |
| US5972853A (en) * | 1997-11-12 | 1999-10-26 | Exxon Chemical Patents Inc. | Wear control with dispersants employing poly alpha-olefin polymers |
| US6143701A (en) * | 1998-03-13 | 2000-11-07 | Exxon Chemical Patents Inc. | Lubricating oil having improved fuel economy retention properties |
| JP5057603B2 (en) * | 1998-05-01 | 2012-10-24 | 昭和シェル石油株式会社 | Lubricating oil composition for internal combustion engines |
| US6569818B2 (en) * | 2000-06-02 | 2003-05-27 | Chevron Oronite Company, Llc | Lubricating oil composition |
| US6528461B1 (en) * | 2000-11-28 | 2003-03-04 | Bank Of America, N.A. | Lubricant containing molybdenum and polymeric dispersant |
| EP1310549B1 (en) * | 2001-11-09 | 2006-05-31 | Infineum International Limited | Boron containing lubricating oil compositions with low sulfur and phosphorus content |
| US7026273B2 (en) | 2001-11-09 | 2006-04-11 | Infineum International Limited | Lubricating oil compositions |
| EP1329496A1 (en) * | 2002-01-14 | 2003-07-23 | Infineum International Limited | Lubricating oil compositions with low sulfur and phosphorous content |
| US6777378B2 (en) | 2002-02-15 | 2004-08-17 | The Lubrizol Corporation | Molybdenum, sulfur and boron containing lubricating oil composition |
| EP1632554B1 (en) * | 2004-09-07 | 2011-08-24 | Infineum International Limited | Lubricating oil composition |
| US8361940B2 (en) | 2006-09-26 | 2013-01-29 | Chevron Japan Ltd. | Low sulfated ash, low sulfur, low phosphorus, low zinc lubricating oil composition |
| US8586516B2 (en) | 2007-01-19 | 2013-11-19 | Afton Chemical Corporation | High TBN / low phosphorus economic STUO lubricants |
| US9951290B2 (en) | 2016-03-31 | 2018-04-24 | Exxonmobil Research And Engineering Company | Lubricant compositions |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59122597A (en) * | 1982-11-30 | 1984-07-16 | Honda Motor Co Ltd | Lubricating oil composition |
| US4648985A (en) * | 1984-11-15 | 1987-03-10 | The Whitmore Manufacturing Company | Extreme pressure additives for lubricants |
| US4812246A (en) * | 1987-03-12 | 1989-03-14 | Idemitsu Kosan Co., Ltd. | Base oil for lubricating oil and lubricating oil composition containing said base oil |
| JP2911668B2 (en) * | 1991-12-12 | 1999-06-23 | 出光興産株式会社 | Engine oil composition |
| EP0588561B1 (en) * | 1992-09-14 | 1998-12-02 | Oronite Japan Limited | Low phosphorous engine oil compositions and additive compositions |
| EP0609623B1 (en) * | 1992-12-21 | 1999-03-03 | Oronite Japan Limited | Low phosphorous engine oil compositions and additive compositions |
| JP3613530B2 (en) * | 1993-05-27 | 2005-01-26 | 東燃ゼネラル石油株式会社 | Lubricating oil composition |
-
1995
- 1995-08-31 EP EP95928596A patent/EP0778876A1/en not_active Withdrawn
- 1995-08-31 WO PCT/IB1995/000725 patent/WO1996006904A1/en not_active Application Discontinuation
- 1995-08-31 AU AU32306/95A patent/AU3230695A/en not_active Abandoned
- 1995-08-31 CA CA002195475A patent/CA2195475A1/en not_active Abandoned
- 1995-09-01 CA CA002157425A patent/CA2157425A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| CA2195475A1 (en) | 1996-03-07 |
| AU3230695A (en) | 1996-03-22 |
| WO1996006904A1 (en) | 1996-03-07 |
| EP0778876A1 (en) | 1997-06-18 |
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