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
  • C10M167/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound, a non-macromolecular compound and a compound of unknown or incompletely defined constitution, 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
  • C10M2203/102—Aliphatic fractions
  • C10M2203/1025—Aliphatic fractions used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • 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
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/022—Ethene
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/026—Butene
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/02—Hydroxy compounds
  • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
  • C10M2207/028—Overbased salts 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
  • 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
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/28—Esters
  • C10M2207/287—Partial esters
  • C10M2207/289—Partial esters containing free hydroxy 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
  • C10M2215/064—Di- and triaryl amines
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
  • C10M2215/064—Di- and triaryl amines
  • C10M2215/065—Phenyl-Naphthyl amines
• • 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—Overbasedsulfonic 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
  • 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
  • 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
• • 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
  • C10N2030/04—Detergent property or dispersant property
• • 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
  • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
• • 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
  • C10N2030/40—Low content or no content compositions
  • C10N2030/42—Phosphor free or low phosphor content compositions
• • 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
  • C10N2030/40—Low content or no content compositions
  • C10N2030/43—Sulfur free or low sulfur content compositions
• • 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
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/68—Shear stability
• • 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
• • 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
  • C10N2040/044—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for manual transmissions

Definitions

• the present invention relates to a lubricating oil composition.
• the present invention relates to a lubricating oil composition, for example, a lubricating oil composition suitably used for a transmission.
• a viscosity index improver such as a polymer
• these polymers cause a reduction in the viscosity of the lubricating oil by undergoing shear during use. Therefore, when blending the viscosity index improver with the lubricating oil, it is necessary to consider such a decrease in viscosity during actual vehicle travel.
• Patent Documents 1 and 2 by adding a viscosity index improver excellent in shear stability to a low-viscosity base oil, the viscosity of the lubricating oil is further reduced (kinematic viscosity at 100 ° C .: minimum 6.2 mm 2 / s. ).
• a viscosity index improver excellent in shear stability to a low-viscosity base oil
• the viscosity of the lubricating oil is further reduced (kinematic viscosity at 100 ° C .: minimum 6.2 mm 2 / s. ).
• a viscosity index improver excellent in shear stability to a low-viscosity base oil.
• Patent Document 3 a molybdenum-based compound is used as a lubricating oil while reducing the viscosity without adding a polymethacrylate-based compound to the lubricating oil (kinematic viscosity at 100 ° C .: about 6.0 mm 2 / s or more in the examples).
• a molybdenum-based compound is used as a lubricating oil while reducing the viscosity without adding a polymethacrylate-based compound to the lubricating oil (kinematic viscosity at 100 ° C .: about 6.0 mm 2 / s or more in the examples).
• Patent Documents 1 to 3 do not solve the concerns associated with lowering the viscosity of the lubricating oil. Further, it does not sufficiently satisfy the demand for improvement in heat resistance and oxidation stability accompanying reduction in size and weight of the apparatus.
• the present invention has been made in view of the above circumstances. That is, an object of the present invention is to provide a lubricating oil composition that reduces viscosity during actual vehicle travel and achieves improved heat resistance and oxidation stability while achieving low viscosity.
• the present inventors have found that a lubricating oil composition containing specific components (A) to (C) as essential components together with a base oil can solve the above-mentioned problems. That is, the present invention provides the following [1] to [5].
• Olefin oligomer (A) having a mass average molecular weight of 500 or more and 5000 or less, Antioxidant (B) containing phenolic antioxidant (B-1) and amine antioxidant (B-2), and alkaline earth metal detergent (C) Including
• the content of the alkaline earth metal detergent (C) in terms of alkaline earth metal atoms is 1700 mass ppm or more and 2700 mass ppm or less based on the total amount of the lubricating oil composition,
• a lubricating oil composition having a kinematic viscosity at 100 ° C. of 4.0 mm 2 / s or more and 6.0 mm 2 / s or less.
• [2] A transmission filled with the lubricating oil composition according to [1].
• [3] A lubricating method using the lubricating oil composition according to the above [1].
• [4] A method for using the lubricating oil composition according to [1] in a transmission.
• the manufacturing method of the lubricating oil composition mix
• a lubricating oil composition that achieves low viscosity, suppresses a decrease in viscosity during actual vehicle travel, and achieves improved heat resistance and oxidation stability.
• kinematic viscosity at 100 ° C.” and “kinematic viscosity at 40 ° C.” of the base oil or the lubricating oil composition mean values measured based on the method described in JIS K 2283: 2000.
• the content of alkaline earth metal atoms in the lubricating oil composition means a value measured according to JPI-5S-38-92.
• alkaline earth metal atom refers to beryllium atom, magnesium atom, calcium atom, strontium atom, and barium atom.
• the lubricating oil composition according to the present embodiment includes an olefin oligomer (A) having a mass average molecular weight of 500 or more and 5000 or less, a phenolic antioxidant (B-1) and an amine antioxidant (B-2) together with a base oil. ) And an alkaline earth metal detergent (C), and the alkaline earth metal detergent (C) content in terms of alkaline earth metal atoms is lubricating oil. It is 1700 mass ppm or more and 2700 mass ppm or less on the basis of the total amount of the composition, and the kinematic viscosity at 100 ° C. is 4.0 mm 2 / s or more and 6.0 mm 2 / s or less.
• the total content of the base oil, the olefin oligomer (A), the antioxidant (B), and the alkaline earth metal detergent (C) is the lubricating oil composition Is preferably 70% by mass or more, more preferably 75% by mass or more, still more preferably 80% by mass or more, still more preferably 85% by mass or more, and still more preferably 90% by mass or more. Moreover, it is 100 mass% or less normally, Preferably it is 99.9 mass% or less, More preferably, it is 99 mass% or less.
• the lubricating oil composition of the present embodiment contains an olefin oligomer (A), and the olefin oligomer (A) needs to have a mass average molecular weight of 500 or more and 5000 or less.
• the olefin oligomer (A) has fluidity in a high-temperature part of an apparatus, for example, a transmission, and has an effect of washing away generated sludge. When the molecular weight of the olefin oligomer (A) is less than 500, it evaporates in a high temperature region and does not provide a sufficient cleaning effect.
• the mass average molecular weight of the olefin oligomer (A) is preferably 600 or more and 4500 or less, more preferably 700 or more and 4000 or less, and still more preferably 800 or more and 3000 or less.
• the olefin oligomer (A) is not particularly limited as long as it has a polyolefin skeleton and a molecular weight of 500 or more and 5000 or less.
• the olefin oligomer (A) preferably has a structural unit derived from an unsaturated hydrocarbon monomer having 2 to 5 carbon atoms, such as a propylene oligomer, an isobutylene oligomer, a polybutene, a polyisobutylene, an octene oligomer, a decene oligomer, and ethylene.
• olefin oligomers such as propylene oligomers.
• polybutene-1 is preferably used.
• An olefin oligomer (A) may be used individually by 1 type, and may use 2 or more types together.
• the olefin oligomer (A) may be blended within a range in which the kinematic viscosity at 100 ° C. of the lubricating oil composition of the present embodiment is 4.0 mm 2 / s or more and 6.0 mm 2 / s or less.
• the content of the olefin oligomer (A) having a mass average molecular weight of 500 or more and 5000 or less in the lubricating oil composition of the present embodiment is preferably 0.8% by mass based on the total amount of the lubricating oil composition. It is 4.5 mass% or less, More preferably, it is 1 mass% or more and 4 mass% or less, More preferably, it is 1.2 mass% or more and 2.5 mass% or less.
• the lubricating oil composition of the present embodiment contains an antioxidant (B), and the antioxidant (B) includes a phenol-based antioxidant (B-1), an amine-based antioxidant (B-2), and including.
• the antioxidant (B) includes a phenol-based antioxidant (B-1), an amine-based antioxidant (B-2), and including.
• B-1 phenol-based antioxidant
• B-2 amine-based antioxidant
• sufficient antioxidant performance cannot be obtained.
• the phenolic antioxidant (B-1) is not particularly limited as long as it is a compound having a phenol structure and having an effect of suppressing oxidation of the lubricating oil composition.
• examples of the phenolic antioxidant (B-1) include 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,4,6 -Tri-tert-butylphenol, 2,6-di-tert-butyl-4-hydroxymethylphenol, 2,6-di-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol, 2,6-di -Tert-butyl-4- (N, N'-dimethylaminomethyl) phenol, 2,6-di-tert-amyl-4-methylphenol, 2,6-di-tert-amyl-p-cresol, 4, 4′-methylenebis (2,6-di-tert-butylphenol), 4,4′-
• the amine-based antioxidant (B-2) that can be used in the present embodiment is not particularly limited. Examples thereof include compounds represented by the following general formula (B-2-1).
• Ar 1 and Ar 2 are each independently selected from a phenyl group, a phenyl group substituted with an alkyl group, a phenyl group substituted with an aralkyl group, a naphthyl group, and a naphthyl group substituted with an alkyl group.
• the amine-based antioxidant (B-2) includes phenyl- ⁇ -naphthylamines represented by the following general formula (B-2-2) and the general formula (B-2-3). It is preferable to be selected from diphenylamines represented by:
• R 1 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms
• R 2 and R 3 each independently represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms).
• Specific amine antioxidants (B-2) include, for example, monoalkyldiphenylamines such as monooctyldiphenylamine and monononyldiphenylamine; 4,4′-dibutyldiphenylamine, 4,4′-dipentyldiphenylamine, 4, Dialkyldiphenylamines such as 4′-dihexyldiphenylamine, 4,4′-diheptyldiphenylamine, 4,4′-dioctyldiphenylamine, 4,4′-dinonyldiphenylamine; tetrabutyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, tetra Polyalkyldiphenylamines such as nonyldiphenylamine, ⁇ -naphthylamine, naphthylamines such as phenyl- ⁇ -naphthy
• phenolic antioxidant (B-1) and the amine antioxidant (B-2) used in combination as the antioxidant (B) include pentaerythritol tetrakis [3- (3,5-di- tert-butyl-4-hydroxyphenyl) propionate] or octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate (B-1) and monobutylphenyl monooctylphenylamine Or any combination with (B-2) which is Npt-octylphenyl-1-naphthylamine.
• the content of the antioxidant (B) including the phenolic antioxidant (B-1) and the amine antioxidant (B-2) is based on the total amount of the lubricating oil composition. Preferably they are 0.5 mass% or more and 3.0 mass% or less, More preferably, they are 0.5 mass% or more and 2.0 mass% or less, More preferably, they are 1 mass% or more and 2 mass% or less.
• the content of the antioxidant (B) indicates the total amount of the phenolic antioxidant (B-1) and the amine antioxidant (B-2).
• the content of the antioxidant (B) is 0.5% by mass or more, the antioxidant effect is sufficiently exhibited. From the viewpoint of the antioxidant effect, 3.0 mass% is sufficient as the upper limit of the content of the antioxidant (B).
• the mass ratio [(B-2) / (B-1)] of the phenol-based antioxidant (B-1) to the amine-based antioxidant (B-2) is not particularly limited. The ratio is preferably about 3/1, more preferably about 1/2 to 2/1. Furthermore, in this embodiment, the total content of the phenolic antioxidant (B-1) and the amine antioxidant (B-2) in the antioxidant (B) is the total amount of the antioxidant (B). Preferably, it is 60% by mass or more and 100% by mass or less, more preferably 70% by mass or more and 100% by mass or less, still more preferably 80% by mass or more and 100% by mass or less, and still more preferably 90% by mass or more and 100% by mass or less. Still more preferably, it is 99 mass% or more and 100 mass% or less.
• the phenolic antioxidant (B-1) and the amine antioxidant (B-2) in combination are essential to use as the antioxidant (B). It does not exclude including other antioxidants as long as the effects of the embodiments are not impaired.
• other antioxidants include molybdenum amine complex antioxidants.
• the molybdenum amine complex-based antioxidant is a hexavalent molybdenum compound, specifically, a product obtained by reacting molybdenum trioxide and / or molybdic acid with an amine compound, for example, as described in JP-A-2003-252887 A compound obtained by the production method can be used.
• the lubricating oil composition of the present embodiment contains an alkaline earth metal detergent (C), and the content of the alkaline earth metal detergent (C) in terms of alkaline earth metal atoms is the lubricating oil composition. It needs to be 1700 mass ppm or more and 2700 mass ppm or less on the basis of the total amount of things.
• the alkaline earth metal detergent (C) has a cleaning effect of suppressing the generation of sludge and dispersing the generated sludge by the acid neutralization action of the deteriorated component generated in the oil.
• the content of the alkaline earth metal detergent (C) in terms of the alkaline earth metal atom in terms of the total amount of the lubricating oil composition is less than 1700 mass ppm, the neutralizing action described above is sufficiently exhibited. Inferior in oxidation stability and heat resistance. If the content of alkaline earth metal detergent (C) in terms of alkaline earth metal atoms exceeds 2700 ppm by mass, the amount of metal in the composition will increase and become the core of sludge formation, resulting in poor heat resistance. It becomes.
• the content of the alkaline earth metal detergent (C) in terms of alkaline earth metal atoms, based on the total amount of the lubricating oil composition, is preferably 1800 ppm to 2600 ppm, more preferably 1900 ppm. It is 2500 mass ppm or less, More preferably, it is 2000 mass ppm or more and 2500 mass ppm or less.
• alkaline earth metal detergent (C) at least one selected from the group consisting of an alkaline earth metal sulfonate, an alkaline earth metal phenate, and an alkaline earth metal salicylate described in detail below is used. It may be a mixture of two or more. Among these, alkaline earth metal sulfonates are preferable in terms of heat resistance.
• Alkaline earth metal sulfonates include alkaline earth metal salts of alkyl aromatic sulfonic acids obtained by sulfonated alkyl aromatic compounds having a molecular weight of 300 to 1,500, preferably 400 to 700, particularly magnesium salts and / or Or a calcium salt etc. can be mentioned. Among them, it is preferable to use a calcium salt.
• Alkaline earth metal phenates include alkylphenols, alkylphenol sulfides, alkaline earth metal salts of Mannich reactants of alkylphenols, particularly magnesium salts and / or calcium salts, among which calcium salts are particularly preferred.
• alkaline earth metal salicylates include alkaline earth metal salts of alkyl salicylic acid, particularly magnesium salts and / or calcium salts, among which calcium salts are preferred.
• the number of carbon atoms of the alkyl group constituting the alkaline earth metal detergent (C) is preferably 4-30, more preferably 6-18, and the alkyl group may be linear or branched.
• the alkyl group may be a primary alkyl group, a secondary alkyl group, or a tertiary alkyl group.
• the alkaline earth metal sulfonate, alkaline earth metal phenate, and alkaline earth metal salicylate may be neutral, basic, or overbased.
• Examples of the neutral alkaline earth metal salt include, for example, the above-mentioned alkyl aromatic sulfonic acid, alkylphenol, alkylphenol sulfide, Mannich reaction product of alkylphenol, alkyl salicylic acid and the like, and an alkaline earth metal oxide of magnesium and / or calcium.
• a neutral alkaline earth metal sulfonate obtained by reacting with an alkaline earth metal base such as sodium hydroxide or hydroxide, or once replacing the alkaline earth metal salt such as sodium salt or potassium salt with an alkaline earth metal salt Mention may be made of neutral alkaline earth metal phenates and neutral alkaline earth metal salicylates.
• Examples of the basic alkaline earth metal salt include, for example, the above neutral alkaline earth metal sulfonate, neutral alkaline earth metal phenate and neutral alkaline earth metal salicylate, excess alkaline earth metal salt and alkaline earth metal base.
• basic alkaline earth metal sulfonates, basic alkaline earth metal phenates and basic alkaline earth metal salicylates obtained by heating in the presence of water.
• the overbased alkaline earth metal salt for example, the above-mentioned neutral alkaline earth metal sulfonate, neutral alkaline earth metal phenate and neutral alkaline earth metal salicylate in the presence of carbon dioxide gas are mixed with alkaline earth metal carbonate. Mention may be made of overbased alkaline earth metal sulfonates, overbased alkaline earth metal phenates and overbased alkaline earth metal salicylates obtained by reacting salts or borates.
• the alkaline earth metal detergent (C) is usually commercially available in a state diluted with a light lubricating base oil or the like, and is available, but generally the metal content is 1.0. It is preferable to use one having a content of -20% by mass, preferably 2.0-16% by mass.
• the metal ratio of the alkaline-earth metal type cleaning agent (C) of this embodiment Usually, 20 or less things can be used 1 type or in mixture of 2 or more types.
• the metal ratio is preferably 3 or less, more preferably 1.5 or less, and particularly preferably 1.2 or less, because it is excellent in oxidation stability, base number maintenance, and heat resistance at high temperatures.
• the metal ratio here is represented by the valence of the metal element in the metal-based detergent ⁇ metal element content (mol%) / soap group content (mol%), and the metal elements include calcium, magnesium, and the like.
• the soap group means a sulfonic acid group, a phenol group, a salicylic acid group, or the like.
• the alkaline earth metal detergent (C) may be neutral, basic or overbased as described above, for example, usually 10 mgKOH / g or more and 500 mgKOH / g or less, preferably 15 mgKOH / g or more and 450 mgKOH / g.
• the alkaline earth metal detergent (C) which has the following base numbers can be mentioned, and it can use together 1 type, or 2 or more types. In the present embodiment, those having basicity or overbasing are more preferable, and preferably have a base number of 150 mgKOH / g or more and 450 mgKOH / g or less.
• the base number of the alkaline earth metal detergent (C) referred to in the present specification indicates that measured by the JISK2501: 2003: perchloric acid method.
• the base number of the alkaline earth metal detergent (C) is more preferably from 200 mgKOH / g to 450 mgKOH / g, still more preferably from 250 mgKOH / g to 400 mgKOH / g.
• alkaline earth metal atom contained in the alkaline earth metal detergent (C) examples include one or more selected from beryllium atom, magnesium atom, calcium atom, strontium atom, and barium atom. From the viewpoint of improving high-temperature heat resistance, calcium, magnesium, or barium is preferable, calcium or magnesium is more preferable, and calcium is more preferable. As the alkaline earth metal detergent (C), calcium sulfonate can be suitably used. *
• the lubricating oil composition in the present embodiment may contain a polymer (D) having a mass average molecular weight of more than 5000.
• content of a polymer (D) is less than 50 mass parts with respect to 100 mass parts of olefin oligomers (A). If the ratio with respect to 100 mass parts of olefin oligomer (A) is the said range, the heat resistance in the high temperature part of a transmission can be maintained, for example. Moreover, if the quantity of a polymer (D) is the said range, the viscosity fall in the actual vehicle running etc.
• the content of the polymer (D) is more preferably less than 30 parts by mass and even more preferably less than 20 parts by mass with respect to 100 parts by mass of the olefin oligomer (A).
• the weight average molecular weight of the polymer (D) is preferably 120,000 or less, more preferably 50,000 or less, and further preferably 40,000 or less.
• a polymer (D) is not specifically limited, The polymethacrylate etc. which are generally used as a pour point depressant can be mentioned.
• the lubricating oil composition of this embodiment can maintain a stable oil film strength even at high temperatures, and therefore does not need to contain a viscosity index improver.
• the outstanding shear stability is implement
• the lubricating oil composition in the present embodiment may contain zinc dithiophosphate (E).
• E zinc dithiophosphate
• R 4 to R 7 are each independently a linear, branched or cyclic alkyl group having 1 to 24 carbon atoms, and a linear, branched or cyclic alkenyl group having 1 to 24 carbon atoms.
• R 4 to R 7 are each independently a linear, branched or cyclic alkyl group having 1 to 24 carbon atoms, or a linear or branched group having 1 to 24 carbon atoms.
• cyclic alkenyl groups may be different or the same, but the same are preferable from the viewpoint of ease of production.
• R 4 to R 7 are preferably linear, and R 4 to R 7 are preferably alkyl groups.
• alkyl group in R 4 to R 7 examples include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, Examples include tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, icosyl group, heicosyl group, docosyl group, tricosyl group, and tetracosyl group, which are linear, branched, or cyclic.
• alkenyl groups vinyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl Group, heptadecenyl group, octadecenyl group, nonadecenyl group, icocenyl group, henicocenyl group, dococenyl group, tricocenyl group, tetracocenyl group, these may be any of linear, branched or cyclic, double The position of the bond is also arbitrary.
• the content of the lubricating oil composition of the present embodiment contains zinc dithiophosphate (E)
• the content is usually 0.05% by mass or more and 5% by mass or less, preferably 0.1% based on the total amount of the composition.
• the content is from 3% by mass to 3% by mass, and more preferably from 1% by mass to 2.5% by mass. If the content of zinc dithiophosphate (E) is within the above range, for example, when used as MTF (manual transmission fluid), the coefficient of friction ( ⁇ ) can be improved at the time of shifting, and the shift feeling is improved. be able to.
• the base oil used in the present embodiment may be either mineral oil or synthetic oil, or a mixed oil of mineral oil and synthetic oil.
• mineral oil for example, atmospheric residual oil obtained by atmospheric distillation of crude oil such as paraffinic crude oil, mixed crude oil, naphthenic crude oil; distillate oil obtained by vacuum distillation of these atmospheric residual oils; Examples include refined oils and waxes obtained by subjecting the distillate to one or more purification treatments such as solvent deburring, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, and hydrogenation reforming.
• mineral oil classified into Group 2 or 3 in the base oil category of API is preferable. In order to improve the oxidation stability, those classified into Group 3 are more preferable.
• the base oils classified as Group 2 have a saturation content of 90% or more, a sulfur content of 0.03% or less, and a viscosity index of 80 to less than 120.
• Base oils classified as Group 3 have a saturation content of 90% or more, a sulfur content of 0.03% or less, and a viscosity index of 120 or more.
• the sulfur content is a value measured according to JIS K2541-6: 2013, and the saturated content is a value measured according to ASTM D 2007. Furthermore, the viscosity index is a value measured in accordance with JISK 2283: 2000.
• Synthetic oils include polyol esters, dibasic acid esters (for example, ditridecyl glutarate), tribasic acid esters (for example, 2-ethylhexyl trimellitic acid), phosphoric acid esters, and the like; polyphenyl ethers, etc. Examples include various ethers; polyalkylene glycols; alkyl benzenes; alkyl naphthalenes; synthetic oils obtained by isomerizing waxes (GTL (Gas-To-Liquids) waxes) produced by the Fischer-Tropsch method or the like.
• GTL Garnier wax
• these base oils may be used independently and may be used in combination of 2 or more type.
• the kinematic viscosity at 100 ° C. of the base oil used in the present embodiment is preferably 2.0 mm 2 / s to 30 mm 2 / s, more preferably 2.5 mm 2 / s to 25 mm 2 / s, and further preferably 3 .0mm is less than or equal to 2 / s more than 20mm 2 / s.
• the viscosity index of the base oil used in the present embodiment is preferably 80 or higher, more preferably 90 or higher, from the viewpoint of suppressing the change in viscosity due to temperature change and improving the fuel efficiency. Preferably it is 120 or more.
• the kinematic viscosity and viscosity index of the said mixed oil are the said range.
• the content of the base oil is preferably 75% by mass or more, more preferably 80% by mass or more, still more preferably 85% by mass or more, preferably based on the total amount of the composition. It is 97 mass% or less, More preferably, it is 95 mass% or less.
• the transmission lubricating oil composition of this embodiment may contain additives such as friction modifiers, dispersants, and antifoaming agents.
• the pour point depressant is classified as a polymer (D) having a mass average molecular weight exceeding 5000, and is not included in other additives.
• the blending amount of the additive is preferably 10% by mass or less, more preferably 7.5% by mass or less, and still more preferably 5.0% by mass or less, based on the total amount of the composition.
• the kinematic viscosity at 100 ° C. of the lubricating oil composition of the present embodiment is 4.0 mm 2 / s to 6.0 mm 2 / s.
• the oil film strength is lowered, leading to seizure resistance, wear resistance, fatigue resistance, and the like.
• the stirring resistance increases, which is not preferable in terms of fuel saving.
• the kinematic viscosity at 100 ° C. of the lubricating oil composition of the present embodiment is more preferably 4.5 mm 2 / s to 5.8 mm 2 / s, and even more preferably 4.6 mm 2 / s to 5.5 mm 2. / S or less.
• the lubricating oil composition of this embodiment can be suitably used for transmission oil applications.
• the lubricating oil composition of the present embodiment has a low viscosity, suppresses a decrease in viscosity during actual vehicle travel, and is excellent in heat resistance and oxidation stability. Therefore, in a transmission that has been reduced in size and weight, for example, adhesion of sludge in a synchromesh mechanism is suppressed, and a good shift feeling can be obtained. Also, the synchronizer ring operation can be kept good. Therefore, this embodiment can also provide a lubricating method and a using method using the above-described lubricating oil composition.
• the present embodiment can also provide a transmission filled with the above-described lubricating oil composition.
• the lubricating oil composition of the present embodiment comprises a base oil, an olefin oligomer (A) having a mass average molecular weight of 500 or more and 5000 or less, a phenolic antioxidant (B-1) and an amine antioxidant (B-2). And an antioxidant (B) containing alkaline earth metal and a alkaline earth metal detergent (C), respectively, wherein the alkaline earth metal detergent (C) is lubricated. It can manufacture by mix
• the output voltage of the ultrasonic wave in the shear stability test was an output voltage at which the rate of decrease in kinematic viscosity at 100 ° C. was 25% after 30 cc of standard oil was irradiated with ultrasonic waves for 10 minutes.
• Shear stability (%) ⁇ ([Kinematic viscosity before test] ⁇ [Kinematic viscosity after test]) / [Kinematic viscosity before test] ⁇ ⁇ 100
• Lubricating oil compositions were prepared by blending the components shown in Tables 1 and 2.
• the acid values before various tests 40 ° C. kinematic viscosity, 100 ° C. kinematic viscosity, calcium, nitrogen, phosphorus and sulfur amounts were measured, and the above ( The tests shown in I) to (III) were performed. These results are also shown in the table.
• Each compounding material of the said Example and a comparative example is as follows.
• ⁇ Combination material> (1) Mineral oil classified into Group III of the base oil / API base oil category (kinematic viscosity at 40 ° C .: 18.9 mm 2 / s, kinematic viscosity at 100 ° C .: 4.2 mm 2 / s, viscosity index: 128) (2) Olefin oligomer component (A) Oligomer 1: Polybutene-1 having a weight average molecular weight (Mw) of 940 Oligomer 2: Polybutene-1 having a weight average molecular weight (Mw) of 2300 Olefin oligomer / oligomer 3 other than component (A): Decene oligomer / oligomer having a mass average molecular weight (Mw) of 10,000: Ethylene-propylene oligomer having a mass average molecular weight (Mw) of 12,000: Mass average molecular
• the lubricating oil compositions of Examples 1 to 6 have a low kinematic viscosity at 100 ° C. and are excellent in heat resistance and oxidation stability.
• a polymer with a high molecular weight such as a viscosity index improver that causes a decrease in viscosity due to shear is not required, the viscosity decrease rate is low even after the shear test, and the viscosity decrease during actual vehicle running is sufficiently suppressed.
• Table 2 shows the following.
• Comparative Example 1 From Comparative Example 1, it can be seen that if the content of the component (C) in terms of calcium atom in terms of the total amount of the lubricating oil composition is less than this embodiment, the oxidation stability is poor. As in Comparative Example 2, if the content of the component (C) in terms of calcium atom on the basis of the total amount of the lubricating oil composition is too high, the amount of sludge increases and the heat resistance is poor. As shown in Comparative Examples 3 to 5, when an olefin oligomer having a mass average molecular weight outside the scope of the present application is used, the heat resistance is poor. In particular, Comparative Example 5 is inferior in shear stability because the oligomer used has a mass average molecular weight of 17,000. From Comparative Examples 6 and 7, it can be seen that when the phenolic antioxidant and the amine antioxidant are not used together as the antioxidant (B), the heat resistance is also poor.
• a lubricating oil composition that achieves low viscosity, suppresses a decrease in viscosity during actual vehicle travel, and achieves improvement in heat resistance and oxidation stability accompanying reduction in size and weight of the apparatus. be able to.

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