EP0700425B1 - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
- Publication number
- EP0700425B1 EP0700425B1 EP94918149A EP94918149A EP0700425B1 EP 0700425 B1 EP0700425 B1 EP 0700425B1 EP 94918149 A EP94918149 A EP 94918149A EP 94918149 A EP94918149 A EP 94918149A EP 0700425 B1 EP0700425 B1 EP 0700425B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- oil composition
- carbon atoms
- oil
- composition
- 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.)
- Expired - Lifetime
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- 239000000203 mixture Substances 0.000 title claims abstract description 45
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 26
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 15
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 15
- 239000011574 phosphorus Substances 0.000 claims abstract description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
- 239000011701 zinc Substances 0.000 claims abstract description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011575 calcium Substances 0.000 claims abstract description 9
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims abstract description 9
- 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 abstract description 7
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 7
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000012990 dithiocarbamate Substances 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 239000011733 molybdenum Substances 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 18
- 125000000217 alkyl group Chemical group 0.000 claims description 16
- 239000002199 base oil Substances 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 125000006165 cyclic alkyl group Chemical group 0.000 claims description 2
- WMYJOZQKDZZHAC-UHFFFAOYSA-H trizinc;dioxido-sulfanylidene-sulfido-$l^{5}-phosphane Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([S-])=S.[O-]P([O-])([S-])=S WMYJOZQKDZZHAC-UHFFFAOYSA-H 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000003607 modifier Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 239000002270 dispersing agent Substances 0.000 description 6
- MBBWTVUFIXOUBE-UHFFFAOYSA-L zinc;dicarbamodithioate Chemical compound [Zn+2].NC([S-])=S.NC([S-])=S MBBWTVUFIXOUBE-UHFFFAOYSA-L 0.000 description 6
- -1 fatty acid esters Chemical class 0.000 description 5
- 239000003112 inhibitor Substances 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000003963 antioxidant agent Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 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 4
- 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 4
- 239000002480 mineral oil Substances 0.000 description 4
- 239000010705 motor oil Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 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 4
- 239000000725 suspension Substances 0.000 description 4
- 125000001204 arachidyl 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])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000003599 detergent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000002148 esters Chemical class 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
- 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 3
- 230000001603 reducing effect Effects 0.000 description 3
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Chemical group CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 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 2
- 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 2
- 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 2
- RMSGQZDGSZOJMU-UHFFFAOYSA-N 1-butyl-2-phenylbenzene Chemical group CCCCC1=CC=CC=C1C1=CC=CC=C1 RMSGQZDGSZOJMU-UHFFFAOYSA-N 0.000 description 1
- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical class C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-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
- 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
- 239000005069 Extreme pressure additive Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 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
- 150000003939 benzylamines Chemical class 0.000 description 1
- 150000001638 boron Chemical class 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- SNCZNSNPXMPCGN-UHFFFAOYSA-N butanediamide Chemical class NC(=O)CCC(N)=O SNCZNSNPXMPCGN-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- VBIGULIJWJPALH-UHFFFAOYSA-L calcium;2-carboxyphenolate Chemical class [Ca+2].OC1=CC=CC=C1C([O-])=O.OC1=CC=CC=C1C([O-])=O VBIGULIJWJPALH-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical class C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 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 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- 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 1
- 125000001117 oleyl 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])=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 1
- 230000036961 partial effect Effects 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000002530 phenolic antioxidant Substances 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
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920013639 polyalphaolefin 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
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical class O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 1
- 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 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/045—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
- C10M101/02—Petroleum fractions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
- C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
- C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
-
- 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
- C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
- C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
- C10M137/04—Phosphate esters
- C10M137/10—Thio derivatives
-
- 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
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
- C10M159/22—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing phenol radicals
-
- 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
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
- C10M159/24—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing sulfonic radicals
-
- 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
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/104—Aromatic fractions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/104—Aromatic fractions
- C10M2203/1045—Aromatic fractions used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/106—Naphthenic fractions
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/106—Naphthenic fractions
- C10M2203/1065—Naphthenic fractions used as base material
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- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/108—Residual fractions, e.g. bright stocks
- C10M2203/1085—Residual fractions, e.g. bright stocks used as base material
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/028—Overbased salts thereof
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
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- 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
- C10M2219/046—Overbasedsulfonic acid salts
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type compounds
- C10M2219/068—Thiocarbamate metal salts
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- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/089—Overbased salts
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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- C10N2010/12—Groups 6 or 16
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/042—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/044—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for manual transmissions
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
- C10N2040/046—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for traction drives
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/06—Instruments or other precision apparatus, e.g. damping fluids
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/251—Alcohol-fuelled engines
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
- C10N2040/255—Gasoline engines
- C10N2040/28—Rotary engines
Definitions
- the present invention relates to a novel lubricating oil composition, in particular, a lubricating oil composition having improved friction reducing properties and wear resistance and suitable for use as a lubricating oil for internal combustion engines, automatic transmissions, suspension and power steering wheels, particularly as a lubricating oil for internal combustion engines.
- Lubricating oils are usually used for smoothing the operation of internal combustion engines, driving mechanisms such as automatic transmissions, suspensions and power stearings, and gears. Particularly, engine oils are effective in lubricating mainly sliding parts such as a piston ring and a cylinder liner, bearings of a crank shaft or a connecting rod, and valve trains including cams and valve lifters; in cooling the engine; in cleaning and dispersing combustion products; and in preventing rust formation and corrosion.
- a friction modifier is added to the lubricating oil in order to minimize the friction loss and improve the fuel consumption.
- extreme-pressure additives such as molybdenum compounds and phosphoric esters and oiliness improvers such as fatty acid esters and alkylamines are usually used.
- ZnDTP and ZnDTC protect the metal surface from wear due to metal/metal contact by forming a protective film thereon, while the friction modifier also forms a low-friction film by the adsorption onto the metal surface, by the reaction therewith or by the formation of a polymer on the metal surface to reduce the friction.
- the present invention has been completed after investigations made for the purpose of providing a lubricating oil composition having improved friction reduction and antiwear properties and suitable for use as a lubricating oil for internal combustion engines, automatic transmissions, suspension and power steering wheels, particularly as a lubricating oil for internal combustion engines.
- a lubricating oil composition comprising zinc dialkyl dithiophosphates, mainly one having secondary alkyl groups, a calcium sulfonate and a calcium salicylate as a metallic detergent and sulfurized oxymolybdenum dithiocarbamate in specified proportions.
- the present invention has been completed on the basis of this finding.
- the present invention provides a lubricating oil composition
- a base oil containing (A) from 0.04 to 0.12% by weight (in terms of phosphorus), based on the whole composition, of a zinc dialkyl dithiophosphate containing 50 to 100% by weight (in terms of phosphorus), based on the total phosphorus content, of a zinc dialkyl dithiophosphate having secondary alkyl groups and 50 to 0% by weight (in terms of phosphorus), based on the total phosphorus content, of a zinc dialkyl dithiophosphate having primary alkyl groups, (B) 1.0 to 3.0% by weight of a calcium sulfonate and 0.3 to 2.5% by weight of a calcium salicylate, and (C) 50 to 2,000 ppm (in terms of molybdenum) of a sulfurized oxymolybdenum dithiocarbamate containing at least one hydrocarbon group having 8 to 23 carbon atoms, wherein the oil composition is characterized by having a total base number
- the base oil usable as the major component in the lubricating oil composition of the present invention is not particularly limited.
- Base oils are those usually used in ordinary lubricating oils, such as mineral oils and synthetic oils.
- the mineral oils include, for example, 60 neutral oil, 100 neutral oil, 150 neutral oil, 300 neutral oil and 500 neutral oil obtained by solvent refining or hydrotreating; and low pour point base oils prepared by removing a wax from these base oils so as to improve the low-temperature fluidity. They may be used either singly or in the form of a mixture of two or more of them in a proper ratio.
- the synthetic oils include, for example, poly- ⁇ -olefin oligomers, diesters, polyol esters and polyglycol esters. They are usable either singly or in the form of a mixture. They are also usable in the form of a mixture with the above-described mineral oil.
- the mixing weight ratio of the synthetic oil to the mineral oil is, for example, 80:20 to 20:80.
- a suitable base oil usable in the composition of the present invention is one having a viscosity in the range of 3 to 20 cSt at 100°C. Particularly preferred are hydrocracked products and/or wax isomerized product containing 3.0% by weight or below of an aromatic component and having a sulfur content of 50 ppm or below and a nitrogen content of 50 ppm or below.
- the component (A) is zinc dialkyl dithiophosphate (ZnDTP).
- ZnDTP comprises ZnDTP having secondary alkyl groups and ZnDTP having primary alkyl groups in such a proportion that the content of the phosphorus therein is 50 to 100% by weight and 50 to 0% by weight, respectively, based on the total phosphorus content.
- the ZnDTP having secondary alkyl groups include those of the following general formula:
- the groups R 1 and R 2 in the general formula [1] each represent a secondary alkyl group having 3 to 25 carbon atoms, such as propyl, butyl, pentyl, hexyl, cyclohexyl, octyl, decyl, dodecyl, pentadecyl or octadecyl group. They may be the same or different.
- the ZnDTP having primary alkyl groups include, for example, those of the following general formula:
- the groups R 3 and R 4 in the general formula [2] each represent a primary alkyl group having 8 to 25 carbon atoms, such as octyl, decyl, lauryl, myristyl, palmityl, stearyl or eicosyl group. They may be the same or different.
- the amount of ZnDTP used as the component (A) must be 0.04 to 0.12% by weight (in terms of phosphorus) based on the whole composition.
- the amount of phosphorus is below 0.05% by weight, the wear resistance is insufficient and, when it is above 0.12% by weight, there is no further significant improvement in wear resistance.
- the composition of the present invention contains a calcium sulfonate and a calcium salicylate as the metallic detergent (B).
- the amount of the calcium sulfonate must be 1.0 to 3.0% by weight based on the whole composition. When the amount of calcium sulfonate is below 1.0% by weight, the detergency is insufficient and when it is above 3.0% by weight, the detergency effect is not further increased and the ash content is increased unfavorably.
- the calcium salicylate must be contained in an amount of 0.3 to 2.5% by weight based on the whole composition. When it is below 0.3% by weight, no sufficient friction reducing properties can be obtained and, when it exceeds 2.5% by weight, the wear resistance is reduced and the ash content is increased unfavorably.
- R 5 represents a linear, branched or cyclic alkyl group having 8 to 23 carbon atoms, such as octyl, nonyl, decyl, dodecyl, pentadecyl, octadecyl or eicosyl group.
- MoDTC sulfurized oxymolybdenum dithiocarbamate having a hydrocarbon group having 8 to 23 carbon atoms is contained as the component (C) in the composition of the present invention.
- MoDTC has a structure of the following general formula:
- the groups R 6 and R 7 in the above general formula [4] each represent a hydrocarbon group having 8 to 23 carbon atoms.
- the hydrocarbon groups having 8 to 23 carbon atoms include linear and branched alkyl and alkenyl groups having 8 to 23 carbon atoms, and cycloalkyl, aryl alkylaryl and arylalkyl groups having 8 to 23 carbon atoms. Examples of them include 2-ethyl-hexyl, n-octyl, nonyl, decyl, lauryl, tridecyl, palmityl, stearyl, oleyl, eicosyl, butylphenyl and nonylphenyl groups.
- R 6 and R 7 may be the same or different, and m and n are positive integers such that the sum of them is 4.
- MoDTC used as the component (C) may be used either singly or in combination of two or more of them.
- the amount of MoDTC is in the range of 50 to 2,000 ppm (in terms of molybdenum), preferably 100 to 1,000 ppm, based on the whole composition. When the amount of molybdenum is below 50 ppm, no sufficient low-frictional properties can be obtained and when it is above 2,000 ppm, the frictional properties are not further significantly improved.
- the total base number of the composition of the present invention must be 2 to 13, preferably 4 to 9.
- the base number is determined according to JIS K 2501 (the unit of the total base number being mgKOH/g).
- the total base number of the composition of the present invention can be suitably controlled with a calcium sulfonate having a total base number (TBN) of 200 to 300 or a calcium sulfonate having a total base number (TBN) of 10 to 100.
- the lubricating oil composition of the present invention may contain suitable additives usually incorporated into lubricating oils, such as an ashless detergent-dispersant, viscosity index improver, pour point depressant, antioxidant, rust inhibitor, corrosion inhibitor, antifoaming agent and other antiwear agent and friction modifier, so far as the object of the present invention is not disturbed thereby.
- suitable additives usually incorporated into lubricating oils, such as an ashless detergent-dispersant, viscosity index improver, pour point depressant, antioxidant, rust inhibitor, corrosion inhibitor, antifoaming agent and other antiwear agent and friction modifier, so far as the object of the present invention is not disturbed thereby.
- the ashless detergent-dispersant include, for example, succinimides, succinamides, benzylamines and their boron derivatives and esters. They are used in an amount of usually 0.5 to 7% by weight, based on the whole composition.
- the viscosity index improvers include, for example, polymethacrylates, polyisobutylenes, ethylene/propylene copolymers and hydrogenated styrene/butadiene copolymers. They are used in an amount of usually 0.5 to 35% by weight, based on the whole composition.
- the antioxidants include, for example, amine antioxidants such as alkylated diphenylamines, phenyl-a-naphthylamines and alkylated ⁇ -naphthylamines, and phenolic antioxidants such as 2,6-di-t-butyl-4-methylphenol and 4,4'-methylenebis(2,6-di-t-butylphenol). They are used in an amount of usually 0.05 to 2% by weight, based on the whole composition.
- the rust inhibitors include, for example, alkenylsuccinic acids and partial esters thereof.
- the corrosion inhibitors include, for example, benzotriazole and benzimidazole.
- the antifoaming agents include, for example, dimethylpolysiloxanes and polyacrylates. They can be suitably incorporated into the composition.
- the coefficient of friction and wear track diameter of the lubricating oil composition were determined as follows:
- the oil composition according to the invention provides significantly improved coefficient of function, wear track diameter or both over the comparative composition set forth in Table 1-2.
- the lubricating oil composition of the present invention has excellent antiwear properties and also excellent friction reducing properties, and is suitable for use as a lubricating oil for, for example, internal combustion engines, automatic transmissions, suspensions and power steering wheels, particularly as a lubricating oil for internal combustion engines.
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Lubricants (AREA)
Abstract
A lubricating oil composition having a total base number of 2 to 13 and comprising (A) 0.04 to 0.12 % by weight (in terms of phosphorus), based on the whole composition, of a zinc dialkyldithiophosphate, (B) 1.0 to 3.0 % by weight of a calcium sulfonate (TBN 200 to 300) and 0.3 to 2.5 % by weight of a calcium salicylate (TBN 10 to 100) and (C) 50 to 2,000 ppm (in terms of molybdenum) of sulfurized oxymolybdenum dithiocarbamate containing a hydrocarbyl group having 8 to 23 carbon atoms.
Description
The present invention relates to a novel lubricating oil
composition, in particular, a lubricating oil composition having
improved friction reducing properties and wear resistance and suitable
for use as a lubricating oil for internal combustion engines, automatic
transmissions, suspension and power steering wheels, particularly
as a lubricating oil for internal combustion engines.
Lubricating oils are usually used for smoothing the operation
of internal combustion engines, driving mechanisms such as automatic
transmissions, suspensions and power stearings, and gears. Particularly,
engine oils are effective in lubricating mainly sliding parts
such as a piston ring and a cylinder liner, bearings of a crank shaft
or a connecting rod, and valve trains including cams and valve
lifters; in cooling the engine; in cleaning and dispersing combustion
products; and in preventing rust formation and corrosion.
Thus, various functions are required of the engine oils and,
recently, even better functions are being demanded as the required
performance and engine output become higher and higher and the operation
conditions more severe. Under these circumstances, additives
such as a corrosion inhibitor, metallic detergent, ashless dispersant
and antioxidant are incorporated into the engine oil in order to
satisfy such requirements.
It is an important basic function of an engine oil to drive
the engine smoothly and to prevent wear and seizure under any given
condition. In the lubricated parts of an engine, a fluid lubrication
state is mostly realized. However, in the valve train and the top and
the bottom dead centers of a piston, a boundary lubrication state is
apt to occur. In such a boundary lubrication, wear is usually prevented
by addition of zinc dithiophosphate (ZnDTP) or zinc dithiocarbamate
(ZnDTC).
Since the energy loss in the friction parts in which the
lubricating oil participates is high in the engine, a friction
modifier (FM) is added to the lubricating oil in order to minimize the
friction loss and improve the fuel consumption. As the friction
modifiers, extreme-pressure additives such as molybdenum compounds and
phosphoric esters and oiliness improvers such as fatty acid esters and
alkylamines are usually used.
However, when a combination of the antiwear agent with the
friction modifier is used, the functions of both of them are not fully
exhibited because of their competitive adsorption onto the metal
surface. More specifically, ZnDTP and ZnDTC protect the metal surface
from wear due to metal/metal contact by forming a protective film
thereon, while the friction modifier also forms a low-friction film by
the adsorption onto the metal surface, by the reaction therewith or by
the formation of a polymer on the metal surface to reduce the friction.
Therefore, when both ZnDTP or ZnDTC and the friction modifier
are added to the lubricating oil, the adsorption of ZnDTP and ZnDTC is
reduced in amount by the competitive adsorption onto the metal surface
to reduce the wear resistance or no sufficient friction-reducing
effect can be obtained even by the addition of the friction modifier.
On the other hand, an interaction between ZnDTP or ZnDTC and
some detergent-dispersant is apt to occur to reduce the wear resistance.
Further, other additives such as the detergent-dispersant
might exert an influence on the effect of the friction modifier.
Thus, the selection of other additives such as the detergent-dispersant
and the concentration thereof must be taken into consideration.
The present invention has been completed after investigations
made for the purpose of providing a lubricating oil composition having
improved friction reduction and antiwear properties and suitable for
use as a lubricating oil for internal combustion engines, automatic
transmissions, suspension and power steering wheels, particularly as a
lubricating oil for internal combustion engines.
After intensive investigations made for the purpose of
developing a lubricating oil composition having the above-described
excellent properties, the inventors have found that the above purpose
can be attained with a lubricating oil composition comprising zinc
dialkyl dithiophosphates, mainly one having secondary alkyl groups, a
calcium sulfonate and a calcium salicylate as a metallic detergent and
sulfurized oxymolybdenum dithiocarbamate in specified proportions.
The present invention has been completed on the basis of this finding.
Specifically, the present invention provides a lubricating
oil composition comprising a base oil containing (A) from 0.04 to
0.12% by weight (in terms of phosphorus), based on the whole composition,
of a zinc dialkyl dithiophosphate containing 50 to 100% by
weight (in terms of phosphorus), based on the total phosphorus content,
of a zinc dialkyl dithiophosphate having secondary alkyl groups
and 50 to 0% by weight (in terms of phosphorus), based on the total
phosphorus content, of a zinc dialkyl dithiophosphate having primary
alkyl groups, (B) 1.0 to 3.0% by weight of a calcium sulfonate and 0.3
to 2.5% by weight of a calcium salicylate, and (C) 50 to 2,000 ppm (in
terms of molybdenum) of a sulfurized oxymolybdenum dithiocarbamate
containing at least one hydrocarbon group having 8 to 23 carbon atoms,
wherein the oil composition is characterized by having a total base
number of 2 to 13.
The base oil usable as the major component in the lubricating
oil composition of the present invention is not particularly limited.
Base oils are those usually used in ordinary lubricating oils, such as
mineral oils and synthetic oils.
The mineral oils include, for example, 60 neutral oil, 100
neutral oil, 150 neutral oil, 300 neutral oil and 500 neutral oil
obtained by solvent refining or hydrotreating; and low pour point base
oils prepared by removing a wax from these base oils so as to improve
the low-temperature fluidity. They may be used either singly or in
the form of a mixture of two or more of them in a proper ratio.
The synthetic oils include, for example, poly-α-olefin
oligomers, diesters, polyol esters and polyglycol esters. They are
usable either singly or in the form of a mixture. They are also
usable in the form of a mixture with the above-described mineral oil.
The mixing weight ratio of the synthetic oil to the mineral oil is,
for example, 80:20 to 20:80.
A suitable base oil usable in the composition of the present
invention is one having a viscosity in the range of 3 to 20 cSt at
100°C. Particularly preferred are hydrocracked products and/or wax
isomerized product containing 3.0% by weight or below of an aromatic
component and having a sulfur content of 50 ppm or below and a
nitrogen content of 50 ppm or below.
In the composition of the present invention, the component
(A) is zinc dialkyl dithiophosphate (ZnDTP). ZnDTP comprises ZnDTP
having secondary alkyl groups and ZnDTP having primary alkyl groups in
such a proportion that the content of the phosphorus therein is 50 to
100% by weight and 50 to 0% by weight, respectively, based on the
total phosphorus content. By using such a ZnDTP, the object of the
present invention can be effectively attained.
The ZnDTP having secondary alkyl groups include those of the
following general formula:
The groups R1 and R2 in the general formula [1] each represent a
secondary alkyl group having 3 to 25 carbon atoms, such as propyl,
butyl, pentyl, hexyl, cyclohexyl, octyl, decyl, dodecyl, pentadecyl or
octadecyl group. They may be the same or different.
On the other hand, the ZnDTP having primary alkyl groups
include, for example, those of the following general formula:
The groups R3 and R4 in the general formula [2] each represent a
primary alkyl group having 8 to 25 carbon atoms, such as octyl, decyl,
lauryl, myristyl, palmityl, stearyl or eicosyl group. They may be the
same or different.
In the composition of the present invention, the amount of
ZnDTP used as the component (A) must be 0.04 to 0.12% by weight (in
terms of phosphorus) based on the whole composition. When the amount
of phosphorus is below 0.05% by weight, the wear resistance is insufficient
and, when it is above 0.12% by weight, there is no further
significant improvement in wear resistance.
The composition of the present invention contains a calcium
sulfonate and a calcium salicylate as the metallic detergent (B). The
amount of the calcium sulfonate must be 1.0 to 3.0% by weight based on
the whole composition. When the amount of calcium sulfonate is below
1.0% by weight, the detergency is insufficient and when it is above
3.0% by weight, the detergency effect is not further increased and the
ash content is increased unfavorably. On the other hand, the calcium
salicylate must be contained in an amount of 0.3 to 2.5% by weight
based on the whole composition. When it is below 0.3% by weight, no
sufficient friction reducing properties can be obtained and, when it
exceeds 2.5% by weight, the wear resistance is reduced and the ash
content is increased unfavorably.
The calcium salicylates are, for example, those of the
following general formula:
In the general formula (3], R5 represents a linear, branched or cyclic
alkyl group having 8 to 23 carbon atoms, such as octyl, nonyl, decyl,
dodecyl, pentadecyl, octadecyl or eicosyl group.
A sulfurized oxymolybdenum dithiocarbamate (MoDTC) having a
hydrocarbon group having 8 to 23 carbon atoms is contained as the
component (C) in the composition of the present invention. MoDTC has
a structure of the following general formula:
The groups R6 and R7 in the above general formula [4] each
represent a hydrocarbon group having 8 to 23 carbon atoms. The
hydrocarbon groups having 8 to 23 carbon atoms include linear and
branched alkyl and alkenyl groups having 8 to 23 carbon atoms, and
cycloalkyl, aryl alkylaryl and arylalkyl groups having 8 to 23 carbon
atoms. Examples of them include 2-ethyl-hexyl, n-octyl, nonyl, decyl,
lauryl, tridecyl, palmityl, stearyl, oleyl, eicosyl, butylphenyl and
nonylphenyl groups. R6 and R7 may be the same or different, and m and
n are positive integers such that the sum of them is 4.
In the composition of the present invention, MoDTC used as
the component (C) may be used either singly or in combination of two
or more of them. The amount of MoDTC is in the range of 50 to 2,000
ppm (in terms of molybdenum), preferably 100 to 1,000 ppm, based on
the whole composition. When the amount of molybdenum is below 50 ppm,
no sufficient low-frictional properties can be obtained and when it is
above 2,000 ppm, the frictional properties are not further significantly
improved.
The total base number of the composition of the present
invention must be 2 to 13, preferably 4 to 9. The base number is
determined according to JIS K 2501 (the unit of the total base number
being mgKOH/g).
The total base number of the composition of the present
invention can be suitably controlled with a calcium sulfonate having a
total base number (TBN) of 200 to 300 or a calcium sulfonate having a
total base number (TBN) of 10 to 100.
The lubricating oil composition of the present invention may
contain suitable additives usually incorporated into lubricating oils,
such as an ashless detergent-dispersant, viscosity index improver,
pour point depressant, antioxidant, rust inhibitor, corrosion
inhibitor, antifoaming agent and other antiwear agent and friction
modifier, so far as the object of the present invention is not disturbed
thereby.
The ashless detergent-dispersant include, for example,
succinimides, succinamides, benzylamines and their boron derivatives
and esters. They are used in an amount of usually 0.5 to 7% by
weight, based on the whole composition.
The viscosity index improvers include, for example, polymethacrylates,
polyisobutylenes, ethylene/propylene copolymers and hydrogenated
styrene/butadiene copolymers. They are used in an amount of
usually 0.5 to 35% by weight, based on the whole composition. The
antioxidants include, for example, amine antioxidants such as
alkylated diphenylamines, phenyl-a-naphthylamines and alkylated
α-naphthylamines, and phenolic antioxidants such as 2,6-di-t-butyl-4-methylphenol
and 4,4'-methylenebis(2,6-di-t-butylphenol). They are
used in an amount of usually 0.05 to 2% by weight, based on the whole
composition.
The rust inhibitors include, for example, alkenylsuccinic
acids and partial esters thereof. The corrosion inhibitors include,
for example, benzotriazole and benzimidazole. The antifoaming agents
include, for example, dimethylpolysiloxanes and polyacrylates. They
can be suitably incorporated into the composition.
The following Examples will further illustrate the present
invention and do not limit the invention.
The coefficient of friction and wear track diameter of the
lubricating oil composition were determined as follows:
As can be seen from a comparison of the data in Table 1-1 vs.
Table 1-2, the oil composition according to the invention provides
significantly improved coefficient of function, wear track diameter or
both over the comparative composition set forth in Table 1-2.
The lubricating oil composition of the present invention has
excellent antiwear properties and also excellent friction reducing
properties, and is suitable for use as a lubricating oil for, for
example, internal combustion engines, automatic transmissions, suspensions
and power steering wheels, particularly as a lubricating oil for
internal combustion engines.
Claims (6)
- A lubricating oil composition comprising a base oil containing (A) 0.04 to 0.12% by weight in terms of phosphorus, based on the whole composition, of a zinc dialkyl dithiophosphate containing 50 to 100% by weight in terms of phosphorus, based on the total phosphorus content, of a zinc dialkyl dithiophosphate having secondary alkyl groups and 50 to 0% by weight in terms of phosphorus, based on the total phosphorus content, of a zinc dialkyl dithiophosphate having primary alkyl groups, (B) 1.0 to 3.0% by weight of a calcium sulfonate and 0.3 to 2.5% by weight of a calcium salicylate, and (C) 50 to 2000 ppm in terms of molybdenum of a sulfurized oxymolybdenum dithiocarbamate containing at least one hydrocarbyl group having 8 to 23 carbon atoms, wherein the oil composition is characterized by having a total base number of 2 to 13.
- The oil composition of claim 1, wherein the base oil is a hydrocracked oil and/or a wax isomerized oil containing 3.0% by weight or below of an aromatic component and having a sulfur content of 50 ppm or below and a nitrogen content of 50 ppm or below.
- The oil composition of claim 1, wherein the zinc dialkyl dithiophosphate having secondary alkyl groups has the general formula:wherein R1 and R2 are each independently a secondary alkyl group having 3 to 25 carbon atoms.
- The oil composition of claim 1, wherein the zinc dialkyldithiophosphate having primary alkyl groups has the formula:wherein R3 and R4 are each independently a primary alkyl group having 8 to 25 carbon atoms.
- The oil composition of claim 1, wherein the calcium salicylate has the formula:wherein R5 is a linear, branched or cyclic alkyl group having 8 to 23 carbon atoms.
- The oil composition of claim 1, wherein the sulfurized oxymolybdenum dithiocarbamate has the formula:where R6 and R7 are each independently a hydrocarbyl group having 8 to 23 carbon atoms and the sum of m + n is 4.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP148670/93 | 1993-05-27 | ||
| JP14867093A JP3613530B2 (en) | 1993-05-27 | 1993-05-27 | Lubricating oil composition |
| PCT/US1994/006002 WO1994028095A1 (en) | 1993-05-27 | 1994-05-27 | Lubricating oil composition |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0700425A1 EP0700425A1 (en) | 1996-03-13 |
| EP0700425A4 EP0700425A4 (en) | 1996-09-18 |
| EP0700425B1 true EP0700425B1 (en) | 1998-07-08 |
Family
ID=15457998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94918149A Expired - Lifetime EP0700425B1 (en) | 1993-05-27 | 1994-05-27 | Lubricating oil composition |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0700425B1 (en) |
| JP (1) | JP3613530B2 (en) |
| AU (1) | AU694122B2 (en) |
| CA (1) | CA2163206C (en) |
| DE (1) | DE69411563T2 (en) |
| NO (1) | NO313012B1 (en) |
| WO (1) | WO1994028095A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235335B (en) * | 2007-01-19 | 2015-01-28 | 雅富顿公司 | High TBN / low phosphorus economic STUO lubricants |
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| CN1045103C (en) * | 1994-06-18 | 1999-09-15 | 兰州炼油化工总厂三星公司 | Alkyl salicylate as additive of lubricant oil |
| CA2195475A1 (en) * | 1994-09-01 | 1996-03-07 | Michiya Yamada | Lubricants with sustained fuel economy performance |
| JP3510368B2 (en) * | 1995-01-31 | 2004-03-29 | 東燃ゼネラル石油株式会社 | Lubricating oil composition for internal combustion engines |
| GB9519668D0 (en) * | 1995-09-27 | 1995-11-29 | Exxon Chemical Patents Inc | Low chlorine low ash crankcase lubricant |
| KR100216626B1 (en) * | 1995-11-13 | 1999-10-01 | 나가시마 카쭈시게 | Lubricating oil for internal combustion |
| EP0811674B1 (en) * | 1995-12-22 | 2002-05-22 | Japan Energy Corporation | Lubricating oil for internal combustion engines |
| US5726133A (en) * | 1996-02-27 | 1998-03-10 | Exxon Research And Engineering Company | Low ash natural gas engine oil and additive system |
| JP3382784B2 (en) * | 1996-07-10 | 2003-03-04 | 東燃ゼネラル石油株式会社 | Automatic transmission oil composition |
| US5814587A (en) * | 1996-12-13 | 1998-09-29 | Exxon Research And Engineering Company | Lubricating oil containing an additive comprising the reaction product of molybdenum dithiocarbamate and metal dihydrocarbyl dithiophosphate |
| JPH11181464A (en) * | 1997-12-18 | 1999-07-06 | Japan Energy Corp | Continuously variable transmission oil composition |
| 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 |
| US6140282A (en) * | 1999-12-15 | 2000-10-31 | Exxonmobil Research And Engineering Company | Long life lubricating oil composition using particular detergent mixture |
| US6191081B1 (en) | 1999-12-15 | 2001-02-20 | Exxonmobil Research And Engineering Company | Long life medium and high ash oils with enhanced nitration resistance |
| JP2002012884A (en) * | 2000-06-28 | 2002-01-15 | Nissan Motor Co Ltd | Engine oil composition |
| EP1195425A1 (en) * | 2000-10-05 | 2002-04-10 | Infineum International Limited | Lubricating oil composition for gas-fuelled engines |
| EP1199349A1 (en) * | 2000-10-05 | 2002-04-24 | Infineum International Limited | Lubricating compositions for fuelled-gas engines |
| EP1195426B1 (en) * | 2000-10-05 | 2007-08-15 | Infineum International Limited | Lubricating oil composition for gas-fuelled engines |
| JP4643030B2 (en) * | 2001-01-29 | 2011-03-02 | 日産自動車株式会社 | Diesel engine oil composition |
| US6784143B2 (en) | 2001-05-11 | 2004-08-31 | Infineum International Ltd. | Lubricating oil composition |
| EP1262538B1 (en) * | 2001-05-11 | 2014-11-26 | Infineum International Limited | Anti-wear and Anti-oxidant Additives for Lubricating Oil Compositions |
| EP1256619A1 (en) * | 2001-05-11 | 2002-11-13 | Infineum International Limited | Lubricating oil composition |
| JP4643087B2 (en) * | 2001-09-25 | 2011-03-02 | 日産自動車株式会社 | Lubricating oil composition for internal combustion engines |
| US6500786B1 (en) * | 2001-11-26 | 2002-12-31 | Infineum International Ltd. | Lubricating oil composition |
| US6765025B2 (en) | 2002-01-17 | 2004-07-20 | Dalian Institute Of Chemical Physics, Chinese Academy Of Science | Process for direct synthesis of diesel distillates with high quality from synthesis gas through Fischer-Tropsch synthesis |
| CN100347277C (en) | 2002-12-17 | 2007-11-07 | 新日本石油株式会社 | Lubricating oil additive and lubricating oil composition |
| GB2423524A (en) * | 2005-02-28 | 2006-08-30 | Infineum Int Ltd | Crankcase lubricating oil |
| JP2007045850A (en) | 2005-08-05 | 2007-02-22 | Tonengeneral Sekiyu Kk | Lube oil composition |
| DE102006026742A1 (en) * | 2006-06-07 | 2007-12-13 | Addinol Lube Oil Gmbh | Synthetic or mineral high-performance industry gear oil, comprises poly alpha-olefin/polyol ester binder or solvent a neutral raffinate, and an additive package containing e.g. corrosion inhibitors, antioxidants and dispersing agents |
| US20080090741A1 (en) * | 2006-10-16 | 2008-04-17 | Lam William Y | Lubricating oils with enhanced piston deposit control capability |
| JP2010189657A (en) * | 2010-04-26 | 2010-09-02 | Tonengeneral Sekiyu Kk | Lubricating oil composition for internal combustion engine |
| JP5105557B2 (en) * | 2010-04-26 | 2012-12-26 | 東燃ゼネラル石油株式会社 | Lubricating oil composition for internal combustion engines |
| JP5773365B2 (en) | 2011-12-27 | 2015-09-02 | シェブロンジャパン株式会社 | Fuel-saving lubricating oil composition for internal combustion engines |
| JP2013209569A (en) | 2012-03-30 | 2013-10-10 | Jx Nippon Oil & Energy Corp | Lubricating oil composition |
| US9102896B2 (en) | 2012-12-17 | 2015-08-11 | Chevron Japan Ltd. | Fuel economical lubricating oil composition for internal combustion engines |
| JP7000267B2 (en) | 2018-07-10 | 2022-02-04 | 本田技研工業株式会社 | Inverted vibration damping device |
| WO2024204555A1 (en) * | 2023-03-30 | 2024-10-03 | Ｅｎｅｏｓ株式会社 | Hydraulic oil composition for shock absorber |
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|---|---|---|---|---|
| DE2108780C2 (en) * | 1971-02-24 | 1985-10-17 | Optimol-Ölwerke GmbH, 8000 München | Lubricant or lubricant concentrate |
| SU654669A1 (en) * | 1976-12-06 | 1979-03-30 | Предприятие П/Я Р-6711 | Lubricating oil for rotary piston engines |
| SU1049528A1 (en) * | 1981-11-25 | 1983-10-23 | Витебский технологический институт легкой промышленности | Lubricant for textile equipment |
| JPS59122597A (en) * | 1982-11-30 | 1984-07-16 | Honda Motor Co Ltd | Lubricating oil composition |
| US4832867A (en) * | 1987-10-22 | 1989-05-23 | Idemitsu Kosan Co., Ltd. | Lubricating oil composition |
| US4832857A (en) * | 1988-08-18 | 1989-05-23 | Amoco Corporation | Process for the preparation of overbased molybdenum alkaline earth metal and alkali metal dispersions |
| US5281347A (en) * | 1989-09-20 | 1994-01-25 | Nippon Oil Co., Ltd. | Lubricating composition for internal combustion engine |
| CN1023408C (en) * | 1990-11-14 | 1994-01-05 | 中国石油化工总公司一坪化工厂 | Antifriction compound agent |
| JP2911668B2 (en) * | 1991-12-12 | 1999-06-23 | 出光興産株式会社 | Engine oil composition |
-
1993
- 1993-05-27 JP JP14867093A patent/JP3613530B2/en not_active Expired - Lifetime
-
1994
- 1994-05-27 CA CA002163206A patent/CA2163206C/en not_active Expired - Fee Related
- 1994-05-27 DE DE69411563T patent/DE69411563T2/en not_active Expired - Fee Related
- 1994-05-27 WO PCT/US1994/006002 patent/WO1994028095A1/en active IP Right Grant
- 1994-05-27 EP EP94918149A patent/EP0700425B1/en not_active Expired - Lifetime
- 1994-05-27 AU AU69595/94A patent/AU694122B2/en not_active Ceased
-
1995
- 1995-11-21 NO NO19954709A patent/NO313012B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235335B (en) * | 2007-01-19 | 2015-01-28 | 雅富顿公司 | High TBN / low phosphorus economic STUO lubricants |
Also Published As
| Publication number | Publication date |
|---|---|
| AU694122B2 (en) | 1998-07-16 |
| WO1994028095A1 (en) | 1994-12-08 |
| EP0700425A1 (en) | 1996-03-13 |
| EP0700425A4 (en) | 1996-09-18 |
| NO313012B1 (en) | 2002-07-29 |
| NO954709L (en) | 1995-11-21 |
| JPH06336592A (en) | 1994-12-06 |
| DE69411563T2 (en) | 1998-12-17 |
| CA2163206C (en) | 2002-11-26 |
| DE69411563D1 (en) | 1998-08-13 |
| CA2163206A1 (en) | 1994-12-08 |
| NO954709D0 (en) | 1995-11-21 |
| JP3613530B2 (en) | 2005-01-26 |
| AU6959594A (en) | 1994-12-20 |
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