Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
  • C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
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  • 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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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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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
  • C10M2203/102—Aliphatic fractions
  • C10M2203/1025—Aliphatic fractions used as base material
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/026—Butene
  • C10M2205/0265—Butene used as base material
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
  • C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • 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
  • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
  • C10M2209/084—Acrylate; Methacrylate
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2215/042—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Alkoxylated derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions
  • C10M2215/24—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant Compositions having hydrocarbon substituents containing thirty or more carbon atoms, e.g. nitrogen derivatives of substituted succinic acid
  • C10M2215/28—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
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
  • C10M2219/022—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of hydrocarbons, e.g. olefines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
  • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
  • C10M2219/046—Overbased sulfonic acid salts
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/10—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring
  • C10M2219/104—Heterocyclic compounds containing sulfur, selenium or tellurium compounds in the ring containing sulfur and carbon with nitrogen or oxygen in the ring
  • C10M2219/106—Thiadiazoles
• • C—CHEMISTRY; METALLURGY
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  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • 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
  • C10M2223/043—Ammonium or amine salts thereof
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  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • 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
• • 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
  • 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
  • C10M2223/047—Thioderivatives not containing metallic elements
• • 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
  • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
  • C10M2229/02—Unspecified siloxanes; Silicones
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
  • C10N2020/01—Physico-chemical properties
  • C10N2020/02—Viscosity; Viscosity index
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/02—Pour-point; Viscosity index
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/08—Resistance to extreme temperature
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/52—Base number [TBN]
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives

Definitions

• the present invention relates to a lubricating oil composition, a method for producing a lubricating oil composition, and a method for lubricating a transmission or a speed reducer.
• a typical example of a means for improving wear resistance of a lubricating oil composition is a technique of adding an anti-wear agent, such as zinc dialkylthiophosphate (PTLs 1 to 2).
• an anti-wear agent such as zinc dialkylthiophosphate (PTLs 1 to 2).
• the lubricating oil compositions of PTLs 1 to 2 were insufficient in improvement of the wear resistance in a high temperature range where oil film is difficult to retain.
• the present invention has an object to provide a lubricating oil composition that can ensure a low viscosity thereof and that can achieve a good wear resistance even in a high temperature range where oil film is difficult to retain.
• the present invention provides the following [1] to [3].
• a lubricating oil composition of this embodiment contains a base oil (A), at least one compound (B) selected from a zinc dithiophosphate (B1) and a sulfurized olefin (B2), a sarcosine compound (C), and a thiophosphate ester or an amine salt thereof (D), the base oil (A) having a high-viscosity base oil (A1) that has a 100°C kinematic viscosity of 25 mm 2 /s or higher blended therein.
• base oil (A) used in this embodiment one or two or more selected from mineral oils and synthetic oils can be used.
• the high viscosity in the high-viscosity base oil (A1) in the present invention means a 100°C kinematic viscosity of at least 25 mm 2 /s or higher.
• the base oil (A) used in this embodiment has the high-viscosity base oil (A1) blended therein.
• the high-viscosity base oil (A1) one or two or more selected from mineral oils and synthetic oils can be used.
• the high-viscosity base oil (A1) preferably has a 100°C kinematic viscosity of 25 to 300 mm 2 /s, more preferably 27 to 250 mm 2 /s, and further preferably 30 to 230 mm 2 /s.
• the following (i) to (iv) are mentioned as an embodiment of a numerical range of the 100°C kinematic viscosity of the high-viscosity base oil (A1), but any of the upper limits of (i) to (iv) and any of the lower limits thereof can be combined.
• the range of the 100°C kinematic viscosity of the high-viscosity base oil (A1) may be 25 to 250 mm 2 /s.
• kinematic viscosity and the viscosity index mean values measured or calculated according to JIS K2283:2003.
• the high-viscosity base oil (A1) preferably has a 40°C kinematic viscosity of 200 to 3000 mm 2 /s, more preferably 300 to 2500 mm 2 /s, and further preferably 350 to 2200 mm 2 /s.
• the amount of the high-viscosity base oil (A1) blended is preferably 2.0 to 15.0% by mass, more preferably 3.0 to 10.0% by mass, and further preferably 4.0 to 8.0% by mass, based on the total amount of the base oil (A).
• the base oil (A) used in this embodiment preferably has a low viscosity base oil (A2) that has a 100°C kinematic viscosity of 2 to 12 mm 2 /s blended therein in addition to the high-viscosity base oil (A1) having a 100°C kinematic viscosity of 25 mm 2 /s or higher.
• the low viscosity base oil (A2) preferably has a 100°C kinematic viscosity of 2.5 to 10 mm 2 /s, and further preferably 3 to 8 mm 2 /s.
• the low viscosity base oil (A2) preferably has a 40°C kinematic viscosity of 10 to 40 mm 2 /s, more preferably 15 to 37 mm 2 /s, and further preferably 18 to 35 mm 2 /s.
• the amount of the low viscosity base oil (A2) blended is preferably 85.0 to 98.0% by mass, more preferably 90.0 to 97.0% by mass, and further preferably 92.0 to 96.0% by mass, based on the total amount of the base oil (A).
• An example of the mineral oil as the base oil (A), such as the high-viscosity base oil (A1) or the low viscosity base oil (A2), is a refined oil obtained by refining a distillate obtained by subjecting an atmospheric distillation residual oil (oil remaining after subjecting a crude oil, such as paraffin crude oil, intermediate base crude oil, and naphthene crude oil to atmospheric distillation to extract gas, gasoline, kerosene, and the like) to reduced-pressure distillation.
• an atmospheric distillation residual oil oil remaining after subjecting a crude oil, such as paraffin crude oil, intermediate base crude oil, and naphthene crude oil to atmospheric distillation to extract gas, gasoline, kerosene, and the like
• Examples of a refining method for obtaining the refined oil include hydroforming treatment, solvent extraction treatment, solvent dewaxing treatment, hydroisomerization dewaxing treatment, hydrofinishing treatment, and clay treatment.
• Examples of the synthetic oil as the base oil (A), such as the high-viscosity base oil (A1) or the low viscosity base oil (A2), include a hydrocarbon oil, an aromatic oil, an ester oil, and an ether oil. Another example thereof is a synthetic oil obtained by isomerizing a wax produced by Fischer-Tropsch process or the like (GTL wax).
• hydrocarbon oil examples include n-paraffin, isoparaffin, a poly- ⁇ -olefine (PAO), such as polybutene, polyisobutylene, 1-decene oligomer, cooligomer of 1-decene and ethylene, and a hydrogenated product thereof.
• PAO poly- ⁇ -olefine
• aromatic oil examples include an alkylbenzene, such as a monoalkylbenzene or a dialkylbenzene; and an alkylnaphthalene, such as a monoalkylnaphthalene, a dialkylnaphthalene, and a polyalkylnaphthalene.
• alkylbenzene such as a monoalkylbenzene or a dialkylbenzene
• alkylnaphthalene such as a monoalkylnaphthalene, a dialkylnaphthalene, and a polyalkylnaphthalene.
• ester oil examples include a diester oil, such as dibutyl sebacate, di-2-ethylhexyl sebacate, dioctyl adipate, diisodecyl adipate, ditridecyl adipate, ditridecyl glutarate, or methylacetyl ricinolate; an aromatic ester oil, such as trioctyl trimellitate, tridecyl trimellitate, or tetraoctyl pyromellitate; a polyol ester oil, such as trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythrytol-2-ethylhexanoate, or pentaerythritol pelargonate; and a complex ester oil, such as an oligo ester of a polyhydric alcohol and a mixed fatty acid of a dibasic acid and a monobasic acid.
• the ether oil examples include a polyglycol, such as polyethylene glycol, polypropylene glycol, polyethylene glycol monoether, and polypropylene glycol monoether; a phenyl ether oil, such as a monoalkyl triphenyl ether, an alkyldiphenyl ether, a dialkyldiphenyl ether, pentaphenyl ether, tetraphenyl ether, a monoalkyl tetraphenyl ether, or a dialkyl tetraphenyl ether.
• a polyglycol such as polyethylene glycol, polypropylene glycol, polyethylene glycol monoether, and polypropylene glycol monoether
• a phenyl ether oil such as a monoalkyl triphenyl ether, an alkyldiphenyl ether, a dialkyldiphenyl ether, pentaphenyl ether, tetraphenyl ether, a monoalky
• the content of the base oil (A) is preferably 80.0 to 98.0% by mass, more preferably 85.0 to 96.0% by mass, and further preferably 87.0 to 95.0% by mass, based on the total amount of the lubricating oil composition.
• the base oil (A) preferably has a 100°C kinematic viscosity of 4.0 to 8.0 mm 2 /s, more preferably 4.3 to 7.0 mm 2 /s, and further preferably 4.5 to 6.5mm 2 /s.
• the base oil (A) preferably has a 40°C kinematic viscosity of 15 to 45 mm 2 /s, more preferably 18 to 40 mm 2 /s, and further preferably 20 to 38 mm 2 /s.
• the lubricating oil composition of this embodiment is required to contain at least one compound (B) selected from a zinc dithiophosphate (B1) and a sulfurized olefin (B2).
• B1 zinc dithiophosphate
• B2 sulfurized olefin
• the lubricating oil composition contains the compound (B), and the lubricating oil composition is required to further contain the sarcosine compound (C) and the thiophosphate ester or an amine salt thereof (D) which are described later.
• At least one compound selected from the zinc dithiophosphate (B1) and the sulfurized olefin (B2) is contained.
• a preferred example of the zinc dithiophosphate (B1) is a compound represented by the following general formula (III).
• R 31 to R 31 each independently represent a hydrocarbon group.
• the hydrocarbon group as R 31 to R 34 is not particularly limited as long as it is a monovalent hydrocarbon group, and preferred examples thereof include an alkyl group, an alkenyl group, a cycloalkyl group, and an aryl group. An alkyl group and an aryl group are more preferred and an alkyl group is further preferred.
• the zinc dithiophosphate used in this embodiment is preferably a zinc dialkyldithiophosphate or a zinc diaryldithiophosphate, and further preferably a zinc dialkyldithiophosphate.
• the alkyl group and alkenyl group as R 31 to R 34 may be either linear or branched.
• R 31 to R 34 are an alkyl group, taking into account the tendencies of a primary alkyl group which is superior in oxidation stability in a high temperature range and a secondary alkyl group which is superior in wear resistance, it is preferred to select either of the zinc dialkyldithiophosphate in which R 31 to R 34 are a primary alkyl group (a primary zinc dialkyldithiophosphate) or the zinc dialkyldithiophosphate in which R 31 to R 34 are a secondary alkyl group (a secondary zinc dialkyldithiophosphate), or to appropriately mix a primary zinc dialkyldithiophosphate and a secondary zinc dialkyldithiophosphate, depending on the property regarded to be important.
• a primary zinc dialkyldithiophosphate a primary zinc dialkyldithiophosphate
• a secondary zinc dialkyldithiophosphate a secondary zinc dialkyldithiophosphate
• a primary zinc dialkyldithiophosphate and a secondary zinc dialkyldithiophosphate at a mass ratio of 3:7 to 7:3 and more preferably at 4:6 to 6:4, from the viewpoint of the balance between oxidation stability and wear resistance.
• the cycloalkyl group and the aryl group as R 31 to R 34 may be, for example, a polycyclic group, such as a decalyl group or a naphthyl group.
• the monovalent hydrocarbon group as R 31 to R 34 may have a substituent containing an oxygen atom and/or a nitrogen atom, such as a hydroxy group, a carboxy group, an amino group, an amide group, a nitro group, or a cyano group, or may be partially substituted with a nitrogen atom, an oxygen atom, a halogen atom, or the like.
• the number of carbon atoms in the hydrocarbon group as R 31 to R 34 when the monovalent hydrocarbon group is an alkyl group, is preferably 1 or more, more preferably 2 or more, and further preferably 3 or more, and the upper limit thereof is preferably 24 or less, more preferably 18 or less, and further preferably 12 or less.
• the monovalent hydrocarbon is an alkenyl group
• the number of carbon atoms is preferably 2 or more and more preferably 3 or more
• the upper limit thereof is preferably 24 or less, more preferably 18 or less, and further preferably 12 or less.
• the monovalent hydrocarbon is a cycloalkyl group
• the number of carbon atoms is preferably 5 or more and the upper limit thereof is preferably 20 or less.
• the monovalent hydrocarbon is an aryl group
• the number of carbon atoms is preferably 6 or more and the upper limit thereof is preferably 20 or less.
• An example of the sulfurized olefin (B2) is a compound represented by the following general formula (IV).
• R 41 and R 42 each independently represent a monovalent substituent, and contain at least one element of carbon, hydrogen, oxygen, and sulfur.
• R 41 and R 12 is a saturated or unsaturated hydrocarbon group of a linear structure or a branched structure having 1 to 40 carbon atoms
• R 41 and R 42 may be an aliphatic hydrocarbon group having an aliphatic, aromatic, or aromatic group.
• an oxygen and or a sulfur atom may be contained therein. Note that R 41 and R 42 may bind to each other.
• R 41 is preferably an alkenyl group having 2 to 15 carbon atoms
• R 42 is preferably an alkyl group or alkenyl group having 2 to 15 carbon atoms.
• a is an integer of 1 or larger, and preferably 1 to 12, more preferably 1 to 6.
• the compound represented by the general formula (IV) can be obtained, for example, by reacting an olefin having 2 to 15 carbon atoms or a dimer to tetramer thereof and a sulfurizing agent, such as sulfur or sulfur chloride.
• a sulfurizing agent such as sulfur or sulfur chloride.
• the olefin having 2 to 15 carbon atoms propylene, isobutene, and diisobutene are preferred.
• a specific example of the sulfurized olefin is sulfurized isobutylene.
• the compound (B) may contain only either one of the zinc dithiophosphate (B1) and the sulfurized olefin (B2) or may contain both.
• the content of the compound (B) is preferably 0.5 to 5.5% by mass, more preferably 1.0 to 5.0% by mass, and further preferably 1.5 to 4.5% by mass, based on the total amount of the lubricating oil composition.
• a content of the compound (B) of 0.5% by mass or more a good wear resistance in a high temperature range where oil film is difficult to retain can be easily achieved by synergistic effects with the component (C) and the component (D) described later.
• a content of the compound (B) of 5.5% by mass or less corrosion of cupper can be easily inhibited (an effect mainly of reduction of Bl), or occurrence of damage due to the fatigue life of a lubricated site can be easily inhibited (an effect mainly of reduction of B2).
• the lubricating oil composition of this embodiment is required to contain the sarcosine compound (C).
• the lubricating oil composition does not contain the sarcosine compound (C)
• even if it contains the compound (B) a good wear resistance can not be achieved in a high temperature range where oil film is difficult to retain.
• sarcosine compound (C) is a compound represented by the following general formula (I).
• R 11 represents a hydrocarbon group having 2 to 30 carbon atoms and R 12 represents a hydrogen atom or a methyl group.
• the hydrocarbon group as R 11 is not particularly limited as long as it is a monovalent hydrocarbon group, examples thereof include an alkyl group having 2 to 30 carbon atoms, a cycloalkyl group having 3 to 30 carbon atoms, and an alkenyl group having 3 to 30 carbon atoms.
• the monovalent hydrocarbon group may have a substituent containing an oxygen atom and/or nitrogen atom, such as a hydroxy group, a carboxy group, an amino group, an amide group, a nitro group, or a cyano group, or may be partially substituted with a nitrogen atom, an oxygen atom, a halogen atom, or the like.
• the number of carbon atoms in the hydrocarbon group as R 11 is preferably 8 to 26, more preferably 12 to 24, and further preferably 16 to 20.
• R 11 is preferably an alkyl group or an alkenyl group which may have a substituent, and more preferably an alkenyl group which may have a substituent.
• alkyl group which may have a substituent that can be selected as R 11 include an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a hexadecyl group, an octadecyl group, a tetracosyl group, and a hexacosyl group.
• the alkyl group may be a linear alkyl group or a branched alkyl group.
• alkenyl group which may have a substituent that can be selected as R 11 include a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, an undecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a hexadecenyl group, an octadecenyl group, a tetracosenyl group, and a hexacosenyl group.
• alkenyl group may be a linear alkenyl group or a branched alkenyl group.
• a specific example of the compound represented by the general formula (I) in which R 11 is an alkenyl group which may have a substituent is N-oleoyl sarcosine (R 11 has a carboxy group as a substituent and has 18 carbon atoms.
• R 12 is a methyl group.).
• the content of the sarcosine compound (C) is preferably 0.10 to 1.00% by mass, more preferably 0.12 to 0.80% by mass, and further preferably 0.15 to 0.60% by mass, based on the total amount of the lubricating oil composition.
• a content of the sarcosine compound (C) of 0.10% by mass or more With a content of the sarcosine compound (C) of 0.10% by mass or more, a good wear resistance in a high temperature range where oil film is difficult to retain can be easily achieved by synergistic effects with the compound (B) and the thiophosphate ester or an amine salt thereof (D). With a content of the sarcosine compound (C) of 1.00% by mass or less, reduction in seize resistance can be easily suppressed.
• the lubricating oil composition of this embodiment is required to contain the thiophosphate ester or an amine salt thereof (D).
• the lubricating oil composition does not contain the thiophosphate ester or an amine salt thereof (D)
• a good wear resistance cannot be achieved in a high temperature range where oil film is difficult to retain.
• thiophosphate ester is a compound represented by the following general formula (II).
• R 21 and R 22 represent a hydrocarbon group having 1 to 20 carbon atoms and R 21 and R 22 may be the same as or different from each other.
• X represents an oxygen atom or a sulfur atom.
• R 23 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
• the number of carbon atoms in the hydrocarbon group as R 21 and R 22 is preferably 1 to 16, more preferably 1 to 8, and further preferably 3 to 4.
• Examples of the hydrocarbon group as R 21 and R 22 include an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aryl group, and an alkylaryl group. More specific examples thereof include an n-butyl group, an isobutyl group, a tert-butyl group, a cyclopentyl group, a cyclohexyl group, a methylcyclopentyl group, a phenyl group, a benzyl group, a tolyl group (cresyl group), and a xylenyl group.
• the hydrocarbon group may be saturated or unsaturated, and may be linear or branched. Among them, a saturated hydrocarbon group is preferred and an alkyl group is particularly preferred.
• the number of carbon atoms in the hydrocarbon group as R 23 is preferably 1 to 8, more preferably 1 to 6, and further preferably 1 to 4.
• Examples of the hydrocarbon group as R 23 include an alkyl group, a cycloalkyl group, and an alkylcycloalkyl group. More specific examples include a methyl group and an ethyl group.
• the hydrocarbon group may be saturated or unsaturated, and may be linear or branched. Among them, a saturated hydrocarbon group is preferred and an alkyl group is particularly preferred.
• a preferred example of the amine salt of the thiophosphate ester is an amine salt formed from a thiophosphate ester and an amine.
• thiophosphate ester used for forming the amine salt is a compound represented by the general formula (II) in which XR 23 is OH or SH.
• Examples of the amine used for forming the amine salt include a primary amine, a secondary amine, and a tertiary amine which are represented by the general formula NR 3 , and a polyalkyleneamine.
• the primary to tertiary amines represented by the general formula NR 3 are preferably an amine in which one to three of R's are an aliphatic hydrocarbon group and the remaining R(s) is/are a hydrogen atom.
• the aliphatic hydrocarbon group is preferably an alkyl group or an unsaturated hydrocarbon group having one to two unsaturated bonds, and the alkyl group and the unsaturated hydrocarbon group may each be any of linear, branched, or cyclic, but preferably linear.
• Examples of the primary to tertiary amines represented by the general formula NR 3 include oleylamine, dilaurylamine, dimyristylamine, distearylamine, dioleylamine, trilaurylamine, trimyristylamine, tristearylamine, trioleylamine, and tallow alkyl amine.
• polyalkyleneamine examples include ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, heptaethyleneoctamine, tetrapropylenepentamine, and hexabutyleneheptamine.
• the content of the thiophosphate ester or an amine salt thereof (D) is preferably 0.05 to 1.00% by mass, more preferably 0.06 to 0.50% by mass, and further preferably 0.07 to 0.30% by mass, based on the total amount of the lubricating oil composition.
• a content of the thiophosphate ester or an amine salt thereof (D) of 0.05% by mass or more a good wear resistance in a high temperature range where oil film is difficult to retain can be easily achieved by synergistic effects with the compound (B) and the sarcosine compound (C).
• the content of the thiophosphate ester or an amine salt thereof (D) of 1.00% by mass or less the wear due to the excess amount of the component (D) can be easily inhibited.
• W C /W B is preferably 0.02 to 1.00, more preferably 0.03 to 0.50, further preferably 0.04 to 0.20, and furthermore preferably 0.05 to 0.15.
• W D /W B is preferably 0.01 to 1.00, more preferably 0.02 to 0.30, and further preferably 0.03 to 0.10.
• the content of the compound (B) based on the total amount of the lubricating oil composition defined as W B the content of the sarcosine compound (C) based on the total amount of the lubricating oil composition defined as W C , and the content of the thiophosphate ester or an amine salt thereof (D) based on the total amount of the lubricating oil composition defined as W D , (W C +W D )/W B is preferably 0.04 to 1.50, more preferably 0.05 to 0.75, further preferably 0.06 to 0.30, and furthermore preferably 0.07 to 0.20.
• the lubricating oil composition of this embodiment can contain an additive other than the components (A) to (D) to the extent that the effect of the present invention is not impaired.
• the additive examples include an ash-free dispersant, a metal-based detergent, an antioxidant, a metal deactivator, a viscosity index improver, a pour point depressant, and an anti-foaming agent.
• the amount of each additive blended is preferably 10% by mass or less, more preferably 7.5% by mass or less, and further preferably 5.0% by mass or less., based on the total amount of the lubricating oil composition
• the lubricating oil composition preferably has a 100°C kinematic viscosity of 4.0 to 8.0 mm 2 /s, more preferably 4.5 to 7.5 mm 2 /s, and further preferably 4.7 to 7.2 mm 2 /s.
• the lubricating oil composition has a 100°C kinematic viscosity of 4.0 mm 2 /s or higher, reduction in oil film strength in a high temperature range can be easily suppressed.
• the lubricating oil composition has a 100°C kinematic viscosity of 8.0 mm 2 /s or less, a good fuel efficiency can be easily achieved.
• the lubricating oil composition preferably has a 40°C kinematic viscosity of 20 to 40 mm 2 /s, more preferably 22 to 37 mm 2 /s, and further preferably 23 to 35 mm 2 /s.
• the lubricating oil composition of this embodiment can be suitably used in an application to a transmission or a speed reducer. Among transmissions, a manual transmission is useful. Note that the lubricating oil composition of this embodiment is also useful in an application to a speed-increaser.
• this embodiment can provide a transmission, a speed reducer, and a speed increaser with the lubricating oil composition filled therein.
• the method for producing a lubricating oil composition of this embodiment includes a step of mixing a base oil (A) having a high-viscosity base oil (A1) that has a 100°C kinematic viscosity of 25 mm 2 /s or higher blended therein, at least one compound (B) selected from a zinc dithiophosphate (B1) and a sulfurized olefin (B2), a sarcosine compound (C), and a thiophosphate ester or an amine salt thereof (D).
• A base oil having a high-viscosity base oil (A1) that has a 100°C kinematic viscosity of 25 mm 2 /s or higher blended therein
• a lubricating oil composition of this embodiment it is possible to produce in a simple manner a lubricating oil composition which ensure a low viscosity and can achieve a good wear resistance even in a high temperature range where oil film is difficult to retain.
• the method for lubricating a transmission or a speed reducer of this embodiment includes adding the lubricating oil composition of this embodiment described above to a sliding part of the transmission or speed reducer.
• a kinematic viscosity at each temperature was measured according to JIS K 2283:2000.
• the lubricating oil compositions of Examples can achieve a quite good wear resistance even in a high temperature range where oil film is difficult to retain (120°C) while retaining a low viscosity.
• the lubricating oil composition of the present invention is industrially extremely useful in that it can simultaneously achieve "low viscosity” and "wear resistance in a high temperature range" which have conventionally been difficult to simultaneously achieve.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)

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• 2019
  • 2019-07-19 JP JP2019133755A patent/JP7364379B2/ja active Active
• 2020
  • 2020-07-07 EP EP20842964.7A patent/EP4001383A4/fr not_active Withdrawn
  • 2020-07-07 CN CN202080050942.4A patent/CN114207097A/zh active Pending
  • 2020-07-07 WO PCT/JP2020/026602 patent/WO2021014965A1/fr not_active Ceased

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