WO2017150707A1 - Lubricating oil composition - Google Patents
Lubricating oil composition Download PDFInfo
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- WO2017150707A1 WO2017150707A1 PCT/JP2017/008496 JP2017008496W WO2017150707A1 WO 2017150707 A1 WO2017150707 A1 WO 2017150707A1 JP 2017008496 W JP2017008496 W JP 2017008496W WO 2017150707 A1 WO2017150707 A1 WO 2017150707A1
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- lubricating oil
- oil composition
- earth metal
- alkaline earth
- mass
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- 0 C*(c1ccccc1)c1ccccc1 Chemical compound C*(c1ccccc1)c1ccccc1 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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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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- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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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- 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
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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
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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]
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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
- 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
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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
- C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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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
- C10N2040/04—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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Abstract
Description
しかしながら、高粘度指数化にはポリマーなどの粘度指数向上剤を潤滑油に添加することが必要である。これらポリマーは、使用中にせん断を受けることにより潤滑油の粘度低下を引き起こす。そのため、粘度指数向上剤を潤滑油に配合する際は、実車走行時のかかる粘度低下を考慮する必要がある。 In recent years, from the viewpoint of reducing carbon dioxide emissions and fossil fuel consumption, there has been a strong demand for fuel saving in automobiles. For example, in a lubricating oil for an automobile gear device, a reduction in viscosity is being promoted in order to reduce stirring resistance. However, lowering the viscosity of the lubricating oil lowers the oil film strength in the high temperature region, and there is a concern that seizure resistance, wear resistance, fatigue resistance, and the like may decrease. For this, it is effective to keep the viscosity of the lubricating oil high in the high temperature range and to reduce the viscosity of the lubricating oil in the normal temperature range. That is, increasing the viscosity index is effective.
However, to increase the viscosity index, it is necessary to add a viscosity index improver such as a polymer to the lubricating oil. 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.
潤滑油の耐熱性および酸化安定性が悪化するとスラッジが発生し、これが潤滑部位に付着することで潤滑不良を起こす。例えば、スラッジが付着することによるベアリング等の動作不良を挙げることができる。また、特に手動変速機において、変速段の切り替えを受け持つシンクロメッシュ機構におけるスラッジの付着は、摩擦特性の低下によるシフトフィーリングの低下、更にはシンクロナイザーリングが固着することによる動作不良を引き起こす。 In addition, transmission design is becoming smaller and lighter. As the transmission is reduced in size and weight, the mechanical load on the lubrication part increases, so that the lubricating oil to be filled is required to have further improved lubricity. Further, since the heat load increases, further improvement in the heat resistance and oxidation stability of the lubricating oil is required.
When the heat resistance and oxidation stability of the lubricating oil are deteriorated, sludge is generated, and this adheres to the lubrication site, resulting in poor lubrication. For example, a malfunction of a bearing or the like due to adhesion of sludge can be mentioned. Further, particularly in a manual transmission, the adhesion of sludge in the synchromesh mechanism responsible for shifting the gear position causes a reduction in shift feeling due to a reduction in friction characteristics, and further a malfunction due to the synchronizer ring being fixed.
特許文献3では、ポリメタクリレート系化合物を潤滑油に配合せずに低粘度化(100℃における動粘度:実施例において約6.0mm2/s以上)を図りつつ、モリブデン系化合物を潤滑油に配合することにより、シンクロメッシュにおける摩耗を防止し、摩擦特性維持を図っている。 In 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. ). However, since it is not possible to completely suppress the decrease in the viscosity of the lubricating oil due to actual vehicle travel, there is a limit to lowering the viscosity of the new oil.
In 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). By blending, the wear in the synchromesh is prevented and the friction characteristics are maintained.
本発明は、以上の事情に鑑みてなされたものである。すなわち、本発明は、低粘度化を図りつつ、実車走行時における粘度低下を抑制し、また耐熱性及び酸化安定性の向上を達成する、潤滑油組成物を提供することを目的とする。 The techniques described in 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.
すなわち、本発明は、以下の[1]~[5]を提供する。
[1]基油と共に、
質量平均分子量が500以上5000以下のオレフィンオリゴマー(A)、
フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む酸化防止剤(B)、及び
アルカリ土類金属系清浄剤(C)
を含み、
アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子換算での含有量が、潤滑油組成物の全量基準で、1700質量ppm以上2700質量ppm以下であり、
100℃における動粘度が4.0mm2/s以上6.0mm2/s以下である、潤滑油組成物。
[2]上記[1]に記載の潤滑油組成物を充填した、変速機。
[3]上記[1]に記載の潤滑油組成物を用いた、潤滑方法。
[4]上記[1]に記載の潤滑油組成物の変速機への使用方法。
[5]基油に、質量平均分子量が500以上5000以下のオレフィンオリゴマー(A)、フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む酸化防止剤(B)、及びアルカリ土類金属系清浄剤(C)をそれぞれ配合する潤滑油組成物の製造方法であって、アルカリ土類金属系清浄剤(C)を、前記潤滑油組成物の全量基準で、アルカリ土類金属原子換算での含有量が1700質量ppm以上2700質量ppm以下となるように配合する、潤滑油組成物の製造方法。 As a result of intensive studies, 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].
[1] Along with the base oil,
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.
[5] An antioxidant (A) containing 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) in a base oil. B), and a method for producing a lubricating oil composition comprising an alkaline earth metal detergent (C), wherein the alkaline earth metal detergent (C) is based on the total amount of the lubricating oil composition. The manufacturing method of the lubricating oil composition mix | blended so that content in alkaline earth metal atom conversion may be 1700 mass ppm or more and 2700 mass ppm or less.
<オレフィンオリゴマー(A)>
本実施形態の潤滑油組成物はオレフィンオリゴマー(A)を含有し、該オレフィンオリゴマー(A)の質量平均分子量が500以上5000以下であることを要する。
オレフィンオリゴマー(A)は、装置、例えば変速機の高温部において流動性を有し、生成したスラッジを洗い流す効果を有する。オレフィンオリゴマー(A)の分子量が500未満であると、高温領域で蒸発して、洗浄効果を十分に奏しない。オレフィンオリゴマー(A)の分子量が5000を超えると、高温領域での流動性が保たれず、スラッジを洗い流す効果を十分に発揮できない。
オレフィンオリゴマー(A)の質量平均分子量は、好ましくは600以上4500以下、より好ましくは700以上4000以下、さらに好ましくは800以上3000以下である。 Hereinafter, each component mix | blended with the lubricating oil composition of this embodiment is demonstrated.
<Olefin oligomer (A)>
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. When the molecular weight of the olefin oligomer (A) exceeds 5,000, the fluidity in the high temperature region is not maintained, and the effect of washing off the sludge cannot be sufficiently exhibited.
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.
オレフィンオリゴマー(A)は、1種を単独で用いてもよく、2種以上を併用してもよい。 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. And olefin oligomers such as propylene oligomers. Of these, polybutene-1 is preferably used.
An olefin oligomer (A) may be used individually by 1 type, and may use 2 or more types together.
本実施形態の潤滑油組成物は酸化防止剤(B)を含有し、該酸化防止剤(B)は、フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む。本実施形態においては、酸化防止剤(B)としてフェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを併用することが必要であり、片方のみを使用した場合には、十分な酸化防止性能を得ることができない。 <Antioxidant (B)>
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. In this embodiment, it is necessary to use a phenolic antioxidant (B-1) and an amine antioxidant (B-2) in combination as the antioxidant (B), and when only one of them is used However, sufficient antioxidant performance cannot be obtained.
フェノール系酸化防止剤(B-1)としては、例えば、2,6-ジ-tert-ブチル-4-メチルフェノール、2,6-ジ-tert-ブチル-4-エチルフェノール、2,4,6-トリ-tert-ブチルフェノール、2,6-ジ-tert-ブチル-4-ヒドロキシメチルフェノール、2,6-ジ-tert-ブチルフェノール、2,4-ジメチル-6-tert-ブチルフェノール、2,6-ジ-tert-ブチル-4-(N,N’-ジメチルアミノメチル)フェノール、2,6-ジ-tert-アミル-4-メチルフェノール、2,6-ジ-tert-アミル-p-クレゾール、4,4’-メチレンビス(2,6-ジ-tert-ブチルフェノール)、4,4’-ビス(2,6-ジ-tert-ブチルフェノール)、4,4’-ビス(2-メチル-6-tert-ブチルフェノール)、2,2’-メチレンビス(4-エチル-6-tert-ブチルフェノール)、2,2’-メチレンビス(4-メチル-6-tert-ブチルフェノール)、4,4’-ブチリデンビス(3-メチル-6-tert-ブチルフェノール)、4,4’-イソプロピリデンビス(2,6-ジ-tert-ブチルフェノール)、2,2’-メチレンビス(4-メチル-6-ノニルフェノール)、2,2’-イソブチリデンビス(4,6-ジメチルフェノール)、2,2’-メチレンビス(4-メチル-6-シクロヘキシルフェノール)、2,4-ジメチル-6-tert-ブチルフェノール、4,4’-チオビス(2-メチル-6-tert-ブチルフェノール)、4,4’-チオビス(3-メチル-6-tert-ブチルフェノール)、2,2’-チオビス(4-メチル-6-tert-ブチルフェノール)、ビス(3-メチル-4-ヒドロキシ-5-tert-ブチルベンジル)スルフィド、ビス(3,5-ジ-tert-ブチル-4-ヒドロキシベンジル)スルフィド、2,2’-チオ-ジエチレンビス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート]、トリデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート、ペンタエリスリトールテトラキス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート]、オクチル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート、オクタデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート、及びオクチル-3-(3-メチル-5-tert-ブチル-4-ヒドロキシフェニル)プロピオネート等を挙げることができる。
なお、本実施形態において、フェノール系酸化防止剤(B-1)は、1種を単独で用いてもよく、2種以上を併用してもよい。 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′-bis (2,6-di-tert-butylphenol), 4,4′-bis (2 -Methyl-6-tert-butylphenol), 2,2'-methylenebis (4-ethyl-6-tert-butylphenol), 2,2'-methylenebis (4-methyl-6-tert-butylphenol), 4,4 ' -Butylidenebis (3-methyl-6-tert-butylphenol), 4,4'-isopropylidenebis (2,6-di-tert-butylphenol), 2,2'-methylenebis (4-methyl-6-nonylphenol), 2,2′-isobutylidenebis (4,6-dimethylphenol), 2,2′-methylenebis (4-methyl-6-cyclohexylphenol), 2,4-dimethyl-6-tert-butylphenol, 4,4 '-Thiobis (2-methyl-6-tert-butylphenol), 4,4'-thiobis (3-methyl-6-tert) Butylphenol), 2,2′-thiobis (4-methyl-6-tert-butylphenol), bis (3-methyl-4-hydroxy-5-tert-butylbenzyl) sulfide, bis (3,5-di-tert- Butyl-4-hydroxybenzyl) sulfide, 2,2′-thio-diethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], tridecyl-3- (3,5-di -Tert-butyl-4-hydroxyphenyl) propionate, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octyl-3- (3,5-di-tert- Butyl-4-hydroxyphenyl) propionate, octadecyl-3- (3,5-di-tert -Butyl-4-hydroxyphenyl) propionate and octyl-3- (3-methyl-5-tert-butyl-4-hydroxyphenyl) propionate.
In the present embodiment, the phenolic antioxidant (B-1) may be used alone or in combination of two or more.
(式中、Ar1及びAr2はそれぞれ独立に、フェニル基、アルキル基で置換されたフェニル基、アラルキル基で置換されたフェニル基、ナフチル基、及びアルキル基で置換されたナフチル基から選択される炭素数6~24のアリール基を示す) 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).
Wherein 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. An aryl group having 6 to 24 carbon atoms)
(式中、R1は、水素原子、又は炭素数1~18のアルキル基を示す)
(Wherein R 1 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms)
(式中、R2及びR3は、それぞれ独立に水素原子、炭素数1~18のアルキル基、又は炭素数7~18のアラルキル基を示す)。
(Wherein 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).
なお、本実施形態において、アミン系酸化防止剤(B-2)は、1種を単独で用いてもよく、2種以上を併用してもよい。 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, α-naphthylamine, naphthylamines such as phenyl-α-naphthylamine, butylphenyl-α-naphthylamine, Alkyl-substituted phenyl-α-naphthylamines such as tilphenyl-α-naphthylamine, hexylphenyl-α-naphthylamine, heptylphenyl-α-naphthylamine, octylphenyl-α-naphthylamine, nonylphenyl-α-naphthylamine; diphenylamine, monobutylphenylmonooctyl And phenylamine, Npt-octylphenyl-1-naphthylamine, 4,4′-bis (α, α-dimethylbenzyl) diphenylamine, and the like.
In the present embodiment, the amine-based antioxidant (B-2) may be used alone or in combination of two or more.
本実施形態においては、フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む酸化防止剤(B)の含有量は、潤滑油組成物の全量基準で、好ましくは0.5質量%以上3.0質量%以下、より好ましくは0.5質量%以上2.0質量%以下、さらに好ましくは1質量%以上2質量%以下である。ここで、酸化防止剤(B)の含有量は、フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)との合計量を示す。
酸化防止剤(B)の含有量が0.5質量%以上であれば、酸化防止効果が十分に発揮される。酸化防止効果の面から、酸化防止剤(B)の含有量の上限は3.0質量%で十分である。
また、アミン系酸化防止剤(B-2)に対するフェノール系酸化防止剤(B-1)の質量比[(B-2)/(B-1)]は、特に限定されないが、1/3~3/1程度であることが好ましく、1/2~2/1程度であることがより好ましい。
さらに、本実施形態において、酸化防止剤(B)中におけるフェノール系酸化防止剤(B-1)及びアミン系酸化防止剤(B-2)の合計含有量は、酸化防止剤(B)の全量基準で、好ましくは60質量%以上100質量%以下、より好ましくは70質量%以上100質量%以下、更に好ましくは80質量%以上100質量%以下、より更に好ましくは90質量%以上100質量%以下、更になお好ましくは99質量%以上100質量%以下である。 Specific examples of the 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.
In the present embodiment, 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. Here, the content of the antioxidant (B) indicates the total amount of the phenolic antioxidant (B-1) and the amine antioxidant (B-2).
When 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).
Further, 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.
モリブデンアミン錯体系酸化防止剤としては、6価のモリブデン化合物、具体的には三酸化モリブデン及び/又はモリブデン酸とアミン化合物とを反応させてなるもの、例えば特開2003-252887号公報に記載の製造方法で得られる化合物を用いることができる。 As described above, in this embodiment, it is essential to use the phenolic antioxidant (B-1) and the amine antioxidant (B-2) in combination as the antioxidant (B). It does not exclude including other antioxidants as long as the effects of the embodiments are not impaired. Examples of 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.
本実施形態の潤滑油組成物はアルカリ土類金属系清浄剤(C)を含有し、該アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子換算での含有量が、潤滑油組成物の全量基準で、1700質量ppm以上2700質量ppm以下であることを要する。
アルカリ土類金属系清浄剤(C)は、油中に生成する劣化成分の酸中和作用により、スラッジの生成を抑制し、また生じたスラッジを分散させる清浄効果を有する。
潤滑油組成物の全量基準での、アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子換算での含有量が1700質量ppm未満であると、上述した中和作用が十分に発揮されず、酸化安定性及び耐熱性に劣る。アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子換算での含有量が2700質量ppmを超えると、組成物中の金属量が上昇してスラッジ生成の核となり、耐熱性に劣ることとなる。潤滑油組成物全量基準での、アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子換算での含有量は、好ましくは1800質量ppm以上2600質量ppm以下、より好ましくは1900質量ppm以上2500質量ppm以下、さらに好ましくは2000質量ppm以上2500質量ppm以下である。 <Alkaline earth metal detergent (C)>
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.
When 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.
アルカリ土類金属スルホネートとしては、分子量300~1,500、好ましくは400~700のアルキル芳香族化合物をスルホン化することによって得られるアルキル芳香族スルホン酸のアルカリ土類金属塩、特にマグネシウム塩及び/又はカルシウム塩等を挙げることができる。中でもカルシウム塩を用いることが好ましい。アルカリ土類金属フェネートとしては、アルキルフェノール、アルキルフェノールサルファイド、アルキルフェノールのマンニッヒ反応物のアルカリ土類金属塩、特にマグネシウム塩及び/又はカルシウム塩等を挙げることができ、中でもカルシウム塩が特に好ましい。アルカリ土類金属サリシレートとしては、アルキルサリチル酸のアルカリ土類金属塩、特にマグネシウム塩及び/又はカルシウム塩等を挙げることができ、中でもカルシウム塩が好ましい。
アルカリ土類金属系清浄剤(C)を構成するアルキル基の炭素数は、好ましくは4~30、より好ましくは6~18であり、アルキル基は直鎖でも分枝でもよい。また、上記アルキル基は、1級アルキル基、2級アルキル基又は3級アルキル基のいずれであってもよい。
また、アルカリ土類金属スルホネート、アルカリ土類金属フェネート及びアルカリ土類金属サリシレートは、中性、塩基性及び過塩基性のいずれであっても良い。中性アルカリ土類金属塩としては、例えば、前記のアルキル芳香族スルホン酸、アルキルフェノール、アルキルフェノールサルファイド、アルキルフェノールのマンニッヒ反応物、アルキルサリチル酸等を直接、マグネシウム及び/又はカルシウムのアルカリ土類金属の酸化物や水酸化物等のアルカリ土類金属塩基と反応させる、又は一度ナトリウム塩やカリウム塩等のアルカリ金属塩としてからアルカリ土類金属塩と置換させること等により得られる中性アルカリ土類金属スルホネート、中性アルカリ土類金属フェネート及び中性アルカリ土類金属サリシレートを挙げることができる。塩基性アルカリ土類金属塩としては、例えば、上記中性アルカリ土類金属スルホネート、中性アルカリ土類金属フェネート及び中性アルカリ土類金属サリシレートと過剰のアルカリ土類金属塩やアルカリ土類金属塩基を水の存在下で加熱することにより得られる塩基性アルカリ土類金属スルホネート、塩基性アルカリ土類金属フェネート及び塩基性アルカリ土類金属サリシレートを挙げることができる。過塩基性アルカリ土類金属塩としては、例えば、炭酸ガスの存在下で上記中性アルカリ土類金属スルホネート、中性アルカリ土類金属フェネート及び中性アルカリ土類金属サリシレートをアルカリ土類金属の炭酸塩又はホウ酸塩を反応させることにより得られる過塩基性アルカリ土類金属スルホネート、過塩基性アルカリ土類金属フェネート及び過塩基性アルカリ土類金属サリシレートを挙げることができる。アルカリ土類金属系清浄剤(C)は、通常、軽質潤滑油基油等で希釈された状態で市販されており、また入手可能であるが、一般的に、その金属含有量が1.0~20質量%、好ましくは2.0~16質量%のものを用いるのが好ましい。 As the 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. Examples of the 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. And basic alkaline earth metal sulfonates, basic alkaline earth metal phenates and basic alkaline earth metal salicylates obtained by heating in the presence of water. As 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.
なお、ここでいう金属比とは、金属系清浄剤における金属元素の価数×金属元素含有量(mol%)/せっけん基含有量(mol%)で表され、金属元素とはカルシウム、マグネシウム等、せっけん基とはスルホン酸基、フェノール基及びサリチル酸基等を意味する。 There is no restriction | limiting in particular in 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.
本実施形態における潤滑油組成物は、質量平均分子量が5000を超える重合体(D)を含有してもよい。但し、該重合体(D)を含有する場合には、オレフィンオリゴマー(A)100質量部に対して、重合体(D)の含有量が50質量部未満であることが好ましい。オレフィンオリゴマー(A)100質量部に対する割合が上記範囲であれば、例えば変速機の高温部における耐熱性を保つことができる。また、重合体(D)の量が上記範囲であれば、高分子化合物のせん断等に起因する、実車走行中等における粘度低下を限りなく低減することができる。重合体(D)の含有量は、オレフィンオリゴマー(A)100質量部に対して、30質量部未満であることがより好ましく、20質量部未満であることがさらに好ましい。重合体(D)の質量平均分子量は、好ましくは120,000以下、より好ましくは50,000以下、さらに好ましくは40,000以下である。
重合体(D)は特に限定されず、一般的に流動点降下剤として用いられるポリメタクリレート等を挙げることができる。本実施形態の潤滑油組成物は、粘度指数向上剤を含まなくとも、高温においても安定した油膜強度を保つことができるため、粘度指数向上剤を含む必要がない。また仮に、粘度指数向上剤に分類される重合体(D)を含有する場合にも、上記質量比の範囲内とすることで、優れたせん断安定性を実現する。 <Polymer (D) having a mass average molecular weight exceeding 5000>
The lubricating oil composition in the present embodiment may contain a polymer (D) having a mass average molecular weight of more than 5000. However, when it contains this polymer (D), it is preferable that 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. resulting from the shearing of a high molecular compound etc. can be reduced as much as possible. 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. Even if it does not contain a viscosity index improver, 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. Moreover, also when it contains the polymer (D) classified into a viscosity index improver, the outstanding shear stability is implement | achieved by making it in the range of the said mass ratio.
本実施形態における潤滑油組成物は、ジチオリン酸亜鉛(E)を含有していてもよい。ジチオリン酸亜鉛(E)としては、以下の一般式(E-1)で示されるものが使用される。 <Zinc dithiophosphate (E)>
The lubricating oil composition in the present embodiment may contain zinc dithiophosphate (E). As the zinc dithiophosphate (E), one represented by the following general formula (E-1) is used.
(式中、R4~R7は、それぞれ独立に、炭素数1~24の直鎖状、分岐状又は環状のアルキル基、及び炭素数1~24の直鎖状、分岐状又は環状のアルケニル基から選ばれる基を示す)
Wherein 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. A group selected from a group)
R4~R7は、直鎖状であることが好ましく、またR4~R7は、アルキル基であることが好ましい。 In general formula (E-1), 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. And 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.
本実施形態で用いる基油は、鉱油及び合成油のいずれであってもよく、鉱油と合成油との混合油を用いてもよい。
鉱油としては、例えば、パラフィン系原油、混合系原油、ナフテン系原油等の原油を常圧蒸留して得られる常圧残油;これらの常圧残油を減圧蒸留して得られる留出油;当該留出油を、溶剤脱れき、溶剤抽出、水素化分解、溶剤脱ろう、接触脱ろう、水素化改質等の精製処理を1以上施した精製油及びワックス;等が挙げられる。 <Base oil>
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.
As the 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.
硫黄分は、JIS K2541-6:2013に準拠して測定した値であり、飽和分は、ASTM D 2007に準拠して測定した値である。さらに、粘度指数はJISK 2283:2000に準拠して測定した値である。 In the present embodiment, from the viewpoint of suppressing sludge generation, mineral oil classified into Group 2 or 3 in the base oil category of API (American Petroleum Institute) 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.
なお、2種以上の基油を組み合わせた混合油を用いる場合、当該混合油の動粘度及び粘度指数が上記範囲であることが好ましい。 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.
In addition, when using the mixed oil which combined 2 or more types of base oil, it is preferable that the kinematic viscosity and viscosity index of the said mixed oil are the said range.
本実施形態の変速機用潤滑油組成物は、摩擦調整剤、分散剤、消泡剤等の添加剤を含有してもよい。但し、流動点降下剤については、質量平均分子量が5000を超える重合体(D)に分類され、その他添加剤には含まれない。
添加剤の配合量は、組成物全量基準で、好ましくは10質量%以下、より好ましくは7.5質量%以下、さらに好ましくは5.0質量%以下である。 <Other additives>
The transmission lubricating oil composition of this embodiment may contain additives such as friction modifiers, dispersants, and antifoaming agents. However, 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.
本実施形態の潤滑油組成物の100℃における動粘度は、4.0mm2/s以上6.0mm2/s以下である。100℃における動粘度が4.0mm2/s未満であると、油膜強度が低下し、耐焼付き性、耐摩耗性、及び耐疲労性低下等につながる。100℃における動粘度が6.0mm2/sを超えると、撹拌抵抗が大きくなり、省燃費の点で好ましくない。
本実施形態の潤滑油組成物の100℃における動粘度は、より好ましくは4.5mm2/s以上5.8mm2/s以下であり、さらに好ましくは4.6mm2/s以上5.5mm2/s以下である。 <Physical properties of lubricating oil 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. When the kinematic viscosity at 100 ° C. is less than 4.0 mm 2 / s, the oil film strength is lowered, leading to seizure resistance, wear resistance, fatigue resistance, and the like. When the kinematic viscosity at 100 ° C. exceeds 6.0 mm 2 / s, 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.
本実施形態の潤滑油組成物は、変速機油用途で好適に用いることができる。
本実施形態の潤滑油組成物は、低粘度でありつつ、実車走行時における粘度低下を抑制し、かつ耐熱性と酸化安定性とに優れる。そのため、小型軽量化された変速機において、例えばシンクロメッシュ機構におけるスラッジの付着を抑制し、良好なシフトフィーリングが得られる。また、シンクロナイザーリング動作を良好に保つことができる。そのため、本実施形態は、上述の潤滑油組成物を用いた潤滑方法及び使用方法も提供し得る。
また、本実施形態は、上述の潤滑油組成物を充填した変速機も提供し得る。 <Application, lubrication method, transmission>
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.
本実施形態の潤滑油組成物は、基油に、質量平均分子量が500以上5000以下のオレフィンオリゴマー(A)、フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む酸化防止剤(B)、及びアルカリ土類金属系清浄剤(C)をそれぞれ配合する潤滑油組成物の製造方法であって、アルカリ土類金属系清浄剤(C)を、前記潤滑油組成物の全量基準で、アルカリ土類金属原子換算での含有量が1700質量ppm以上2700質量ppm以下となるように配合することにより製造することができる。 <Method for producing 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 | blending so that content in conversion of an alkaline-earth metal atom may be 1700 mass ppm or more and 2700 mass ppm or less on the basis of the whole quantity of an oil composition.
(1)質量平均分子量(Mw)
GPC(ゲルパーミエーションクロマトグラフィー)法により、標準ポリスチレン換算にて測定した。具体的には、以下の装置及び条件下で測定した。
・GPC装置:Waters 1515 Isocratic HPLC Pump + Waters 2414 Refractive Index Detector(いずれもWaters社製)
・カラム:「TSKgel SuperMultiporeHZ-M」(東ソー社製)を2本連結したもの
・カラム温度:40℃
・溶離液:テトラヒドロフラン
・流速:0.35mL/min
・検出器:屈折率検出器
(2)動粘度
JIS K2283:2000に準拠し、各温度における動粘度を測定した。
(3)潤滑油組成物中のカルシウム原子の含有量、窒素原子の含有量、リン原子の含有量及び硫黄原子の含有量
上記各成分の含有量は、以下の方法により測定した。
(3-1)カルシウム原子(Ca)の含有量及びリン原子(P)の含有量
JPI-5S-38-92に準拠して測定した。
(3-2)窒素原子(N)の含有量
JIS K2609:1998に準拠して測定した。
(3-3)硫黄原子(S)の含有量
JIS K2541-6:2013に準拠して測定した。 <Each measurement method>
(1) Mass average molecular weight (Mw)
It was measured by standard polystyrene conversion by GPC (gel permeation chromatography) method. Specifically, the measurement was performed under the following apparatus and conditions.
-GPC equipment: Waters 1515 Isocratic HPLC Pump + Waters 2414 Refractive Index Detector (all manufactured by Waters)
-Column: Two "TSKgel SuperMultipore HZ-M" (manufactured by Tosoh Corporation) connected.-Column temperature: 40 ° C
-Eluent: Tetrahydrofuran-Flow rate: 0.35 mL / min
-Detector: Refractive index detector (2) Kinematic viscosity Kinematic viscosity at each temperature was measured according to JIS K2283: 2000.
(3) Content of calcium atom, content of nitrogen atom, content of phosphorus atom and content of sulfur atom in lubricating oil composition The content of each component was measured by the following method.
(3-1) Content of Calcium Atom (Ca) and Content of Phosphorus Atom (P) Measured according to JPI-5S-38-92.
(3-2) Content of Nitrogen Atom (N) Measured according to JIS K2609: 1998.
(3-3) Content of Sulfur Atom (S) Measured according to JIS K2541-6: 2013.
(I)パネルコーキング試験
Federal test method 791B・3462に準拠し、パネル温度300℃、油温100℃の条件下で、スプラッシュ時間15秒、停止時間45秒のサイクルで3時間試験した。試験終了後、パネルに付着したコーキング物の重量(mg)を測定した。
(II)酸化安定性
JIS K2514-1:2013に準拠するISOT試験(165.5℃)にて、試験油(潤滑油組成物)に触媒として銅片と鉄片を入れて、試験油を強制劣化させ、96時間後の塩基価(過塩素酸法)を測定した。試験後の塩基価の値が高いほど、塩基価維持性が高く、より長期間使用可能なロングドレイン油であることを示す。また、上記ISOT試験後に、n-ペンタン不溶解分(A法)を測定した。
(III)せん断安定性
JIS K2283:2000に準拠して、試験前とせん断試験後の100℃の動粘度を測定し、下記式によりせん断安定性を算出した。また、せん断試験は、超音波A法(JPI-5S-29-06)に基づき、超音波照射時間60分、室温、油量30ccの測定条件で行った。せん断安定試験の超音波の出力電圧は、標準油30ccに超音波を10分間照射した後、100℃の動粘度低下率が25%となる出力電圧とした。
せん断安定性(%)={([試験前の動粘度]-[試験後の動粘度])/[試験前の動粘度]}×100 <Evaluation method>
(I) Panel coking test In accordance with Federal test method 791B • 3462, the test was conducted for 3 hours in a cycle of a splash time of 15 seconds and a stop time of 45 seconds under the conditions of a panel temperature of 300 ° C and an oil temperature of 100 ° C. After completion of the test, the weight (mg) of the caulk adhered to the panel was measured.
(II) Oxidation stability In the ISOT test (165.5 ° C) in accordance with JIS K2514-1: 2013, copper and iron pieces are put into the test oil (lubricating oil composition) as a catalyst to forcibly degrade the test oil. The base number (perchloric acid method) after 96 hours was measured. The higher the base value after the test, the higher the base number retention and the longer drain oil that can be used for a longer period. Further, after the ISOT test, n-pentane insoluble matter (Method A) was measured.
(III) Shear stability Based on JIS K2283: 2000, the kinematic viscosity of 100 degreeC before a test and after a shear test was measured, and shear stability was computed by the following formula. The shear test was performed based on the ultrasonic wave A method (JPI-5S-29-06) under the measurement conditions of ultrasonic irradiation time of 60 minutes, room temperature, and oil amount of 30 cc. 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
表1及び2に示す各成分を配合して、潤滑油組成物をそれぞれ調製した。各実施例及び比較例で調製した潤滑油組成物について、各種試験前の酸価、40℃動粘度、100℃動粘度、カルシウム、窒素、リン及び硫黄量の測定を行った上で、上記(I)~(III)に示す試験を行った。これらの結果も表に合わせて示す。 Examples 1 to 6 and Comparative Examples 1 to 7
Lubricating oil compositions were prepared by blending the components shown in Tables 1 and 2. For the lubricating oil compositions prepared in each Example and Comparative Example, 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.
<配合材料>
(1)基油
・API基油カテゴリーのグループIIIに分類される鉱油(40℃における動粘度:18.9mm2/s,100℃における動粘度:4.2mm2/s,粘度指数:128)
(2)オレフィンオリゴマー
成分(A)
・オリゴマー1:質量平均分子量(Mw)が940のポリブテン-1
・オリゴマー2:質量平均分子量(Mw)が2300のポリブテン-1
成分(A)以外のオレフィンオリゴマー
・オリゴマー3:質量平均分子量(Mw)が10000のデセンオリゴマー
・オリゴマー4:質量平均分子量(Mw)が12000のエチレン-プロピレン
・オリゴマー5:質量平均分子量(Mw)が17000のエチレン-プロピレン
(3)酸化防止剤(B)
フェノール系酸化防止剤(B-1)
・酸化防止剤(B-1-A):オクタデシル-3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート
・酸化防止剤(B-1-B):ペンタエリスリトールテトラキス[3-(3,5-ジ-tert-ブチル-4-ヒドロキシフェニル)プロピオネート]
アミン系酸化防止剤(B-2)
・酸化防止剤(B-2-C):モノブチルフェニルモノオクチルフェニルアミン
・酸価防止剤(B-2-D):N-p-t-オクチルフェニル-1-ナフチルアミン
(4)アルカリ土類金属系清浄剤(C)
・過塩基性カルシウムスルホネート(塩基価:400mgKOH/g,JISK 2501:2003:過塩素酸法で測定)
(5)ジチオリン酸亜鉛(E)
・ジヘキシルジチオリン酸亜鉛(n-ヘキシル基)
(6)その他添加剤:硫黄系極圧剤、分散剤、無灰系摩擦調整剤及び消泡剤 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 weight (Mw) 17000 ethylene-propylene (3) antioxidant (B)
Phenolic antioxidant (B-1)
Antioxidant (B-1-A): Octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate Antioxidant (B-1-B): Pentaerythritol tetrakis [3 -(3,5-di-tert-butyl-4-hydroxyphenyl) propionate]
Amine-based antioxidant (B-2)
Antioxidant (B-2-C): monobutylphenyl monooctylphenylamine Acid value inhibitor (B-2-D): Npt-octylphenyl-1-naphthylamine (4) alkaline earth Metal detergent (C)
・ Overbased calcium sulfonate (base number: 400 mgKOH / g, JISK 2501: 2003: measured by perchloric acid method)
(5) Zinc dithiophosphate (E)
・ Zinc dihexyl dithiophosphate (n-hexyl group)
(6) Other additives: Sulfur-based extreme pressure agent, dispersant, ashless friction modifier and antifoaming agent
一方、表2より、以下のことがわかる。比較例1から、潤滑油組成物の全量基準での、成分(C)のカルシウム原子換算での含有量が本実施形態に満たないと、酸化安定性に劣ることがわかる。比較例2のように、潤滑油組成物の全量基準での、成分(C)のカルシウム原子換算での含有量が高すぎると、スラッジ量が高くなり耐熱性に劣ることがわかる。比較例3~5のようにオレフィンオリゴマーとして本願範囲外の質量平均分子量のものを用いると、耐熱性に劣ることがわかる。特に、比較例5では、オリゴマーが質量平均分子量17,000のものを用いているためせん断安定性に劣る。比較例6及び7から、酸化防止剤(B)としてフェノール系酸化防止剤とアミン系酸化防止剤とを併用しない場合には、やはり耐熱性に劣ることがわかる。 From Table 1, it can be seen that 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. In addition, since 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. You can see that
On the other hand, Table 2 shows the following. 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.
Claims (14)
- 基油と共に、
質量平均分子量が500以上5000以下のオレフィンオリゴマー(A)、
フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む酸化防止剤(B)、及び
アルカリ土類金属系清浄剤(C)
を含み、
アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子換算での含有量が、潤滑油組成物の全量基準で、1700質量ppm以上2700質量ppm以下であり、
100℃における動粘度が4.0mm2/s以上6.0mm2/s以下であることを特徴とする、潤滑油組成物。 Along with the base oil
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. - オレフィンオリゴマー(A)の含有量が、前記潤滑油組成物の全量基準で、0.8質量%以上4.5質量%以下である、請求項1に記載の潤滑油組成物。 The lubricating oil composition according to claim 1, wherein the content of the olefin oligomer (A) is 0.8% by mass or more and 4.5% by mass or less based on the total amount of the lubricating oil composition.
- オレフィンオリゴマー(A)が、炭素数2以上5以下の不飽和炭化水素モノマーに由来の構成単位を含む、請求項1または2に記載の潤滑油組成物。 The lubricating oil composition according to claim 1 or 2, wherein the olefin oligomer (A) comprises a structural unit derived from an unsaturated hydrocarbon monomer having 2 to 5 carbon atoms.
- オレフィンオリゴマー(A)がポリブテンである、請求項1~3のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 3, wherein the olefin oligomer (A) is polybutene.
- アルカリ土類金属系清浄剤(C)が、150mgKOH/g以上450mgKOH/g以下の塩基価を有するアルカリ土類金属塩である、請求項1~4のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 4, wherein the alkaline earth metal detergent (C) is an alkaline earth metal salt having a base number of 150 mgKOH / g or more and 450 mgKOH / g or less. .
- アルカリ土類金属系清浄剤(C)が、アルカリ土類金属スルホネート、アルカリ土類金属フェネート、及びアルカリ土類金属サリシレートからなる群から選択される少なくとも1種である、請求項1~5のいずれかに一項に記載の潤滑油組成物。 The alkaline earth metal detergent (C) is at least one selected from the group consisting of alkaline earth metal sulfonates, alkaline earth metal phenates, and alkaline earth metal salicylates. The lubricating oil composition according to claim 1.
- アルカリ土類金属系清浄剤(C)のアルカリ土類金属原子が、カルシウム原子又はマグネシウム原子である、請求項1~6のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 6, wherein the alkaline earth metal atom of the alkaline earth metal detergent (C) is a calcium atom or a magnesium atom.
- 酸化防止剤(B)の含有量が、潤滑油組成物の全量基準で、0.5質量%以上3.0質量%以下である、請求項1~7のいずれか一項に記載の潤滑油組成物。 The lubricating oil according to any one of claims 1 to 7, wherein the content of the antioxidant (B) is from 0.5% by mass to 3.0% by mass based on the total amount of the lubricating oil composition. Composition.
- さらに、ジチオリン酸亜鉛(E)を含有する、請求項1~8のいずれか一項に記載の潤滑油組成物。 The lubricating oil composition according to any one of claims 1 to 8, further comprising zinc dithiophosphate (E).
- 請求項1~9のいずれか一項に記載の潤滑油組成物が変速機用である、潤滑油組成物。 A lubricating oil composition, wherein the lubricating oil composition according to any one of claims 1 to 9 is for a transmission.
- 請求項1~9のいずれか一項に記載の潤滑油組成物を充填した、変速機。 A transmission filled with the lubricating oil composition according to any one of claims 1 to 9.
- 請求項1~9のいずれか一項に記載の潤滑油組成物を用いた潤滑方法。 A lubricating method using the lubricating oil composition according to any one of claims 1 to 9.
- 請求項1~9のいずれか一項に記載の潤滑油組成物の変速機への使用方法。 A method for using the lubricating oil composition according to any one of claims 1 to 9 in a transmission.
- 基油に、質量平均分子量が500以上5000以下のオレフィンオリゴマー(A)、フェノール系酸化防止剤(B-1)とアミン系酸化防止剤(B-2)とを含む酸化防止剤(B)、及びアルカリ土類金属系清浄剤(C)をそれぞれ配合する潤滑油組成物の製造方法であって、アルカリ土類金属系清浄剤(C)を、前記潤滑油組成物の全量基準で、アルカリ土類金属原子換算での含有量が1700質量ppm以上2700質量ppm以下となるように配合する、潤滑油組成物の製造方法。 An antioxidant (B) containing, in a base oil, an olefin oligomer (A) having a mass average molecular weight of 500 to 5,000, a phenolic antioxidant (B-1) and an amine antioxidant (B-2); And an alkaline earth metal detergent (C), respectively, wherein the alkaline earth metal detergent (C) is alkaline earth based on the total amount of the lubricating oil composition. The manufacturing method of the lubricating oil composition mix | blended so that content in conversion of a similar metal atom may be 1700 mass ppm or more and 2700 mass ppm or less.
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