WO2014156338A1 - 潤滑油組成物 - Google Patents
潤滑油組成物 Download PDFInfo
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- WO2014156338A1 WO2014156338A1 PCT/JP2014/053029 JP2014053029W WO2014156338A1 WO 2014156338 A1 WO2014156338 A1 WO 2014156338A1 JP 2014053029 W JP2014053029 W JP 2014053029W WO 2014156338 A1 WO2014156338 A1 WO 2014156338A1
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M161/00—Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
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- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
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- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/102—Aliphatic fractions
- C10M2203/1025—Aliphatic fractions used as base material
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- 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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- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
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- 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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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
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- 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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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/22—Heterocyclic nitrogen compounds
- C10M2215/223—Five-membered rings containing nitrogen and carbon only
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- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/28—Amides; Imides
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/041—Triaryl phosphates
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/043—Ammonium or amine salts thereof
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
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- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/047—Thioderivatives not containing metallic elements
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- C10M2229/02—Unspecified siloxanes; Silicones
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- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
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- C10N2020/04—Molecular weight; Molecular weight distribution
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- 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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- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C10N2030/08—Resistance to extreme temperature
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- C10N2030/40—Low content or no content compositions
- C10N2030/42—Phosphor free or low phosphor content compositions
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- C10N2030/43—Sulfur free or low sulfur content compositions
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- 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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- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/08—Hydraulic fluids, e.g. brake-fluids
Definitions
- the present invention relates to a lubricating oil composition, and more specifically, hydraulic fluid for construction machinery, industrial machinery hydraulic fluid, wind turbine hydraulic fluid, machine tool hydraulic fluid, turbine oil, compressor oil, and shock absorber fluid, etc. It relates to the lubricating oil composition.
- An object of the present invention is to provide a lubricating oil composition having excellent wear resistance such as scoring resistance, suppressing the generation of sludge, and having excellent fuel economy.
- the present invention provides the following lubricating oil composition.
- a base oil having a kinematic viscosity at 40 ° C. of 1 mm 2 / s or more and 200 mm 2 / s or less, a viscosity index of 80 or more and a sulfur content of less than 0.03% by mass, (A) a mass average molecular weight of 10, A blend of a polyacrylate compound having a molecular weight of 000 or more and 100,000 or less and (B) at least one of phosphorus compounds represented by the following formula (1):
- Lubricating oil composition wherein the blending amount of component (B) is 0.05% by mass or more and 2.0% by mass or less based on the total amount of the composition, and the viscosity index of the composition is 160 or more .
- a lubricating oil composition comprising the above lubricating oil composition, further comprising (C) at least one sulfur compound represented by the following formula (2).
- R 1 represents a linear or branched alkylene group having 1 to 8 carbon atoms
- R 2 and R 3 each represent a hydrocarbon group having 3 to 20 carbon atoms.
- R represents a hydrogen atom or an alkyl group having 4 or less carbon atoms
- X represents an oxygen atom or a sulfur atom.
- R 1 represents a linear or branched alkylene group having 1 to 8 carbon atoms
- R 2 and R 3 each represent a hydrocarbon group having 3 to 20 carbon atoms.
- a lubricating oil composition wherein the composition has a viscosity index of 160 or more.
- R 4 represents a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms
- R 5 each independently represents a hydrocarbon group having 1 to 18 carbon atoms.
- R 6 , R 7 and R 9 are each independently a linear or branched saturated or unsaturated aliphatic hydrocarbon group having 1 to 18 carbon atoms, or a branched chain.
- R 8 is a linear or branched alkylene group having 1 to 6 carbon atoms
- X 2 , X 3 , and X 4 are Each independently represents a divalent oxygen atom or sulfur atom
- X 1 represents an oxygen atom or sulfur atom
- at least one sulfur atom is contained in the above formula.
- a lubricating oil composition wherein the lubricating oil composition is a hydraulic fluid.
- a lubricating oil composition having excellent wear resistance such as scoring resistance, suppressing the generation of sludge, and having excellent fuel economy.
- the lubricating oil composition of this embodiment comprises (A) a specific polyacrylate compound and (B) a specific phosphorus compound in a base oil, and further includes (C) component, (D) component, Or it is preferable to mix
- the base oil used in the lubricating oil composition of the present invention (hereinafter also referred to as “the present composition”) has a kinematic viscosity at 40 ° C. of 1 mm 2 / s to 200 mm 2 / s.
- the kinematic viscosity at 40 ° C. is 1 mm 2 / s or more, the evaporation loss is small, and when it is 200 mm 2 / s or less, the power loss due to viscous resistance does not become too large. More preferably, the kinematic viscosity at 40 ° C. is in the range of 10 mm 2 / s to 100 mm 2 / s.
- the viscosity index of the base oil is 80 or more. When the viscosity index is 80 or more, a change in viscosity due to a change in temperature is small, and a necessary viscosity at a high temperature is maintained.
- the viscosity index is more preferably 100 or more, and further preferably 120 or more.
- the saturated content of the base oil is preferably 90% by mass or more. When the saturated content is 90% by mass or more, the oxidation stability of the composition is improved.
- the saturated content is more preferably 95% by mass or more, and still more preferably 97% by mass or more.
- the sulfur content of the base oil is less than 0.03% by mass.
- the oxidation stability of this composition improves more that the sulfur content of a base oil is less than 0.03 mass%.
- the sulfur content is a value measured according to JIS K2541, and the saturated content is a value measured according to ASTM D2007.
- the base oil used in the composition is preferably a base oil belonging to groups II, III, and IV of the base oil category defined by the American Petroleum Institute (API) or a base oil mixed with two or more of them. is there.
- Group II is a base oil having a viscosity index of 80 or more and 120 or less, a sulfur content of 0.03 mass% or less and a saturation content of 90 mass% or more
- Group III is a viscosity index of 120 or more and sulfur content of 0.03 mass% or less.
- the base oil has a saturated content of 90% by mass or more
- Group IV is a polyalphaolefin (PAO).
- any of mineral oil and synthetic oil can be used as long as it has the above-mentioned preferred properties.
- mineral oil include paraffin-based mineral oil, intermediate-based mineral oil obtained by purification methods such as solvent refining, hydrogenation refining, and hydrocracking, or A naphthenic base mineral oil is mentioned.
- Synthetic oils include, for example, poly ⁇ -olefin (PAO), ⁇ -olefin copolymer, polybutene, alkylbenzene, polyol ester, dibasic acid ester, polyoxyalkylene glycol, polyoxyalkylene glycol ester, polyoxyalkylene glycol ether.
- slack wax an isomerized product of GTL WAX, and the like are also included.
- hydrorefined mineral oil hydrocracked mineral oil, slack wax, isomerized GTL WAX (wax isomerized mineral oil), and poly ⁇ -olefin are preferable.
- the base oil one kind of the above mineral oil may be used, or two or more kinds may be used in combination.
- the said synthetic oil may be used 1 type and may be used in combination of 2 or more type. Further, one or more mineral oils and one or more synthetic oils may be used in combination.
- the component (A) in the present composition is an acrylate compound having a mass average molecular weight of 10,000 or more and 100,000 or less.
- the mass average molecular weight is less than the lower limit, fuel economy is deteriorated.
- the upper limit is exceeded, the shear stability of the lubricating oil composition is lowered.
- the mass average molecular weight of the component (A) is more preferably 15,000 or more and 80,000 or less, and particularly preferably 20,000 or more and 75,000 or less.
- a poly (meth) acrylate compound is preferably exemplified, and polymethacrylate (PMA) is particularly preferable.
- the polymethacrylate may be a non-dispersed polymethacrylate or a dispersed polymethacrylate.
- the above-mentioned polyacrylate compound may be used alone as the component (A), or two or more kinds may be used in combination.
- the blending amount of the component (A) is preferably 0.1% by mass or more and 20% by mass or less, and more preferably 0.2% by mass or more and 15% by mass or less, based on the total amount of the composition. When the blending amount is not less than the lower limit, a sufficient viscosity index improving effect is obtained, and when it is not more than the upper limit, the shear stability and piston cleanliness of the lubricating oil composition are improved.
- the phosphorus compound used as the component (B) in the present composition is a triaryl phosphate represented by the following formula (1) or a triaryl thiophosphate.
- R represents a hydrogen atom or an alkyl group having 4 or less carbon atoms
- X represents an oxygen atom or a sulfur atom.
- Three Rs in the formula (1) may be the same or different.
- Examples of the alkyl group having 4 or less carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, and tertiary butyl group.
- the phosphorus compound represented by the formula (1) preferably has an acid value of 10 mgKOH / g or less.
- the acid value is 10 mgKOH / g or less, when the lubricating oil composition is obtained, the heat resistance is more excellent and the generation of sludge can be suppressed.
- the acid value is more preferably 5 mgKOH / g or less, and still more preferably 1 mgKOH / g or less.
- the acid value is a value measured according to JIS K2501. Examples of the phosphorus compound represented by the formula (1) include triphenyl phosphate, tricresyl phosphate, triphenyl thiophosphate, tricresyl thiophosphate, mono (di) -t-butyltriphenyl phosphate, and And triphenyl phosphorothioate.
- the phosphorus compound described above as the component (B) may be used alone or in combination of two or more.
- the compounding quantity is 0.05 mass% or more and 2.0 mass% or less on the composition whole quantity basis.
- the amount exceeds 2.0% by mass, a large effect of wear resistance cannot be expected.
- the blending amount is 0.05% by mass or less, the effect of wear resistance cannot be expected.
- a more preferable blending amount is 0.1% by mass or more and 1.0% by mass or less.
- Component (C) As the sulfur compound used as the component (C) in the present composition, a dithiophosphate compound represented by the following formula (2) is preferably used.
- R 1 in the formula (2) represents a linear or branched alkylene group having 1 to 8 carbon atoms
- R 2 and R 3 each represents a hydrocarbon group having 3 to 20 carbon atoms.
- R 1 is preferably a linear or branched alkylene group having 1 to 8 carbon atoms, more preferably a linear or branched alkylene group having 2 to 4 carbon atoms, More preferably, it is a branched alkylene group.
- —CH 2 CH 2 —, —CH 2 CH (CH 3 ) —, —CH 2 CH (CH 2 CH 3 ) —, —CH 2 CH (CH 2 CH 2 CH 3 ) —, etc. are preferred, and —CH 2 CH (CH 3 ) — and —CH 2 CH (CH 3 ) CH 2 — are more preferred.
- the carbon number of each of R 2 and R 3 is smaller than 3, the molecular weight is low, so that the adsorption to the metal surface is liable to occur, and when it is larger than 8, the dissolution to the base oil is liable to occur.
- each of R 2 and R 3 preferably has a linear or branched alkyl group having 3 to 8 carbon atoms, and more preferably a linear or branched alkyl group having 4 to 6 carbon atoms.
- a linear or branched alkyl group having 3 to 8 carbon atoms selected from the group consisting of propyl, isopropyl, butyl, isobutyl, t-butyl, pentyl, isopentyl, hexyl, 2-ethylbutyl, 1-methylpentyl, 1,3-dimethylbutyl and 2-ethylhexyl.
- isobutyl and t-butyl are more preferable.
- the above-described dithiophosphate compound may be used alone as the component (C), or two or more kinds may be used in combination.
- the blending amount of the component (C) is preferably 0.01% by mass or more and 2.0% by mass or less, more preferably 0.02% by mass or more and 0.5% by mass or less, based on the total amount of the composition.
- composition it is preferable to use the amine salt compound made to react with the amine compound by the phosphate ester shown by following formula (3) as (D) component.
- R 4 represents a hydrogen atom or a hydrocarbon group having 1 to 18 carbon atoms
- R 5 represents a hydrocarbon group having 1 to 18 carbon atoms.
- the amine compound constituting the amine salt mono-substituted amines, di-substituted amines and tri-substituted amines having 4 to 60 carbon atoms can be used.
- mono-substituted amines include butylamine, pentylamine, hexylamine, cyclohexylamine, octylamine, laurylamine, stearylamine, oleylamine, benzylamine, etc.
- disubstituted amines examples include dibutylamine, Dipentylamine, dihexylamine, dicyclohexylamine, dioctylamine, dilaurylamine, distearylamine, dioleylamine, dibenzylamine, and the like.
- trisubstituted amines examples include tributylamine, tripentylamine, and trihexyl. Examples include amine, tricyclohexylamine, trioctylamine, trilaurylamine, tristearylamine, trioleylamine, and tribenzylamine.
- alkanolamines such as stearyl monoethanolamine, decyl monoethanolamine, hexyl monopropanolamine, benzyl monoethanolamine, phenyl monoethanolamine, tolyl monopropanolamine, dioleyl monoethanolamine, dilauryl mono Propanolamine, dioctyl monoethanolamine, dihexyl monopropanolamine, dibutyl monopropanolamine, oleyl diethanolamine, stearyl dipropanolamine, lauryl diethanolamine, octyl dipropanolamine, butyl diethanolamine, benzyl diethanolamine, phenyl ⁇ Diethanolamine, Tolyl ⁇ Dipropanolamine, Xylyl ⁇ Diethanol It may be mentioned amine, triethanolamine, tripropanolamine and the like.
- amine compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- examples of the amine salt compound obtained by reacting the phosphate ester represented by the formula (3) with an amine compound include bis (1,3-dimethylbutyl) phosphate dodecylamine, bis (n-octyl) phosphate bis (n -Decanyl) phosphate dodecylamine, 2-ethylhexyl acid phosphate oleylamine, 2-ethylhexyl acid phosphate coconut amine and the like.
- the component (D) may be used alone or in combination of two or more of the amine salt compounds obtained by reacting the above-described phosphate ester and amine compound.
- the blending amount of the component (D) is preferably 0.005% by mass or more and 0.5% by mass or less, more preferably 0.01% by mass or more and 0.1% by mass or less, based on the total amount of the composition.
- the sulfur compound used as the component (E) is preferably a thiophosphoric acid compound represented by the following formula (4).
- R 6 , R 7 and R 9 each independently has a linear or branched saturated or unsaturated aliphatic hydrocarbon group having 1 to 18 carbon atoms, or a branched group. It may be a saturated or unsaturated cyclic hydrocarbon group having 5 to 18 carbon atoms.
- R 8 is a linear or branched alkylene group having 1 to 6 carbon atoms.
- X 2 , X 3 and X 4 are each independently a divalent oxygen atom or sulfur atom.
- X 1 is an oxygen atom or a sulfur atom. In the above formula, at least one sulfur atom is contained.
- Such a sulfur compound has a sulfur atom and a phosphorus atom in the molecule, it can enhance wear resistance such as scoring resistance.
- Specific examples include thiophosphate compounds and dithiophosphate compounds.
- the thiophosphate compound include tributyl phosphorothioate, tripentyl phosphorothionate, trihexyl phosphorothionate, triheptyl phosphorothionate, trioctyl phosphorothionate, trinonyl phosphorothionate, Tridecyl phosphorothioate, Triundecyl phosphorothionate, Tridodecyl phosphorothionate, Tritridecyl phosphorothionate, Tritetradecyl phosphorothionate, Tripentadecyl phosphorothionate, Trihexadecyl phosphorothioate Thionate, triheptadecyl phosphorothionate, trioctade
- dithiophosphate compound examples include dihexyl dithiophosphate, dioctyl dithiophosphate, di (2-ethylhexyl) dithiophosphate, didodecyl dithiophosphate, dihexadecyl dithiophosphate, di (hexylthioethyl) dithiophosphate, di (octyl dithiophosphate).
- additives In order to further improve the performance of the present composition, known additives such as oiliness agents, dispersants, rust inhibitors, metal deactivators, anticorrosives, antioxidants, demulsifiers and antifoaming agents are added to the present. It can mix
- oily agents examples include aliphatic saturated and unsaturated monocarboxylic acids such as stearic acid and oleic acid, polymerized fatty acids such as dimer acid and hydrogenated dimer acid, hydroxy fatty acids such as ricinoleic acid and 12-hydroxystearic acid, lauryl alcohol, Aliphatic saturated and unsaturated monoalcohols such as oleyl alcohol, aliphatic saturated and unsaturated monoamines such as stearylamine and oleylamine, aliphatic secondary amine mixtures having a hydrocarbon chain of 8 to 18 carbon atoms, lauric acid amide And aliphatic saturated and unsaturated monocarboxylic amides such as oleic acid amide, polyhydric fatty acid esters such as oleic acid monoglyceride, and the like.
- the blending amount of these oil-based agents is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 5% by mass or less
- a succinimide derivative can be used as the dispersant. These dispersing agents can be used alone or in combination of two or more. This component has both a rust prevention effect and a sludge dispersion effect.
- a succinimide derivative a succinimide having an alkyl group or an alkenyl group, which is known as an ashless dispersant, in the side chain can be suitably used.
- a succinimide having an alkyl group or an alkenyl group having a number average molecular weight of about 500 to 3000 in the side chain is preferred. When the number average molecular weight of the side chain is less than 500, the dispersibility in the base oil may be deteriorated.
- succinimides such as succinimide having a polybutenyl group or a polyisobutenyl group.
- the polybutenyl group mentioned here is obtained as a mixture of 1-butene and isobutene, a polymer obtained by polymerizing high-purity isobutene, or a product obtained by hydrogenating a polyisobutenyl group.
- the succinimide may be a so-called monotype alkenyl or alkyl succinimide, or a so-called bis type alkenyl or alkyl succinimide.
- boron polyborenyl succinic acid can be obtained by adding the above-mentioned polyamine, polybutenyl succinic acid (anhydride) and boron compound such as boric acid to an organic solvent such as alcohols, hexane, xylene and heating under appropriate conditions.
- An imide can be obtained.
- examples of the boron compound include boric anhydride, boron halide, boric acid ester, boric acid amide, and boron oxide. Of these, boric acid is particularly preferable.
- the boron content is preferably 1 mass ppm or more and 50 mass ppm or less, more preferably 5 mass ppm or more and 30 mass ppm or less based on the total amount of the composition.
- the preferred blending amount of this dispersant is preferably 0.01% by mass or more and 1% by mass or less, more preferably 0.05% by mass or more and 0.5% by mass or less, based on the total amount of the composition.
- metal deactivators and anticorrosives include benzotriazole and thiadiazole.
- the preferred compounding amount of these metal deactivators and anticorrosives is about 0.005% by mass or more and 1% by mass or less, more preferably 0.007% by mass or more and 0.5% by mass or less, based on the total amount of the composition. It is.
- a phenol-based antioxidant and an amine-based antioxidant can be used as the antioxidant. These antioxidants can be used alone or in combination of two or more.
- phenolic antioxidants include 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, octadecyl 3- (3.5-di- monophenolic compounds such as tert-butyl-4-hydroxyphenyl) propionate, 4,4′-methylenebis (2,6-di-tert-butylphenol), 2,2′-methylenebis (4-ethyl-6-tert- And diphenolic compounds such as butylphenol).
- amine antioxidant examples include monoalkyl diphenylamine compounds such as monooctyl diphenylamine and monononyl diphenylamine, 4,4′-dibutyldiphenylamine, 4,4′-dipentyldiphenylamine, 4,4′-dihexyldiphenylamine, 4 , 4'-diheptyldiphenylamine, 4,4'-dioctyldiphenylamine, dialkyldiphenylamine compounds such as 4,4'-dinonyldiphenylamine, polyalkyl such as tetrabutyldiphenylamine, tetrahexyldiphenylamine, tetraoctyldiphenylamine, tetranonyldiphenylamine Diphenylamine compounds, ⁇ -naphthylamine, phenyl- ⁇ -naphthylamine, butylphenyl- ⁇ -naph
- one type of the phenolic antioxidant may be used, or two or more types may be used in combination.
- the said amine antioxidant may be used 1 type, and may be used in combination of 2 or more type.
- the preferable compounding quantity of this antioxidant is 0.05 mass% or more and 2 mass% or less based on the composition whole quantity basis, More preferably, it is 0.1 mass% or more and 1 mass% or less.
- the demulsifier examples include polyalkylene glycols and metal sulfonates. Among them, an EO / PO block copolymer (EO means ethylene oxide, PO means propylene oxide), and both ends are poly-OH. Alkylene glycol is preferred.
- a preferable blending amount of the demulsifier is 0.001% by mass or more and 1.0% by mass or less, and more preferably 0.01% by mass or more and 0.5% by mass or less based on the total amount of the composition.
- the antifoaming agent a high molecular silicone antifoaming agent or a polyacrylate antifoaming agent can be used.
- a preferable blending amount of the antifoaming agent is 0.0001% by mass or more and 0.5% by mass or less, and more preferably 0.0005% by mass or more and 0.3% by mass or less based on the total amount of the composition.
- the composition prepared with the above blending has a viscosity index of 160 or more.
- the viscosity index can be measured by the method of JIS K 2283. More preferably, the viscosity index is 165 or more.
- This composition is excellent in wear resistance such as scoring resistance, has good heat resistance, suppresses sludge generation, and has excellent fuel economy. Therefore, the composition is preferably used as a hydraulic fluid for construction machinery, a hydraulic fluid for industrial machinery, a hydraulic fluid for wind turbines, a hydraulic fluid for machine tools, a turbine oil, a compressor oil, or a shock absorber fluid. Therefore, high efficiency of the device can be expected with this composition. Particularly, since the flow rate per unit time is improved, an excellent effect is exhibited in an apparatus that works at the flow rate. Further, even during use, sludge generation is small and shear stability is high, so it can withstand long-term use. Furthermore, since extreme pressure property is high, it is highly effective in preventing seizure of the pump.
- This composition comprises (A) a specific polyacrylate compound, (B) a specific phosphorus compound, and (C) component in a base oil, and (D) component or (E) component. Is preferably blended. Details will be described below.
- Component (C) As the sulfur compound used as the component (C) in the present composition, a dithiophosphate compound represented by the above formula (2) is used.
- the blending amount of the component (C) in the composition is preferably 0.01% by mass or more and 2.0% by mass or less, and 0.02% by mass or more and 0.5% by mass or less based on the total amount of the composition. Is more preferable. Since the components other than the component (C) are the same as those in the first embodiment, the description thereof is omitted.
- the compounding quantity of (B) component shall be 0.05 mass% or more and 0.5 mass% or less on the basis of the composition whole quantity.
- Pipe length (between pump discharge part and relief valve: 1.2 m, inner diameter 25.44 mm, PA2816-77 pressure resistant rubber hose manufactured by Bridgestone Flowtech, suction side: 1.8 m, inner diameter 38.1 mm, Bridgestone Flowtech VW24 pressure-resistant rubber hose), tank capacity is 100L, and the integrating flowmeter is RSA0040A0FBMD3450010R type manufactured by Nitto Seiko Co., Ltd.
- Base oil 1 paraffinic mineral oil, 40 ° C. kinematic viscosity 20.4 mm 2 / s, 100 ° C. kinematic viscosity 4.28 mm 2 / s, viscosity index 116, sulfur content less than 0.01% by mass 2)
- Base oil 2 Paraffinic mineral oil, 40 ° C. kinematic viscosity 36.8 mm 2 / s, 100 ° C. kinematic viscosity 6.52 mm 2 / s, viscosity index 131, sulfur content less than 0.01% by mass 3)
- Base oil 3 paraffinic mineral oil, 40 ° C. Kinematic viscosity 45.1 mm 2 / s, 100 ° C.
- Polymer component ethylene propylene copolymer, 40 ° C. kinematic viscosity 37500 mm 2 / s, 100 ° C.
- polyacrylate compound 1 ((A) component): PMA polyacrylates, 100 ° C. kinematic viscosity 852Mm 2 / S, mass average molecular weight (Mw) 37000 7) Polyacrylate compound 2 (component (A)): PMA polyacrylate, 100 ° C. kinematic viscosity 490 mm 2 / s, mass average molecular weight (Mw) 30000 8) Polyacrylate compound 3 (component (A)): PMA polyacrylate, 100 ° C.
- Acid value, base number Measured by an indicator method, potentiometric method, hydrochloric acid method, or perchloric acid-back titration method in accordance with “Lubricating oil neutralization test method” defined in JIS K2501.
- (finger) indicates an indicator method
- (electric) indicates a potentiometric method
- (salt) indicates a hydrochloric acid method
- (per) indicates a perchloric acid-back titration method.
- Rust prevention artificial seawater: Measured according to JIS K2510 (B method, artificial seawater method).
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Abstract
Description
また、油圧システムに用いられる油圧作動油による高効率化も必須の技術となっており、省燃費型、省電力型の油圧作動油が提案されている(たとえば特許文献1参照)。
〔1〕40℃における動粘度が1mm2/s以上200mm2/s以下、粘度指数が80以上および硫黄分が0.03質量%未満である基油に、(A)質量平均分子量が10,000以上100,000以下であるポリアクリレート系化合物と、(B)下記式(1)で示されるリン化合物のうち少なくとも1種とを配合してなり、
前記(B)成分の配合量が、組成物全量基準で0.05質量%以上2.0質量%以下であり、当該組成物の粘度指数が160以上であることを特徴とする潤滑油組成物。
〔3〕上述の潤滑油組成物において、さらに、(C)下記式(2)に示される硫黄化合物のうち少なくとも1種を配合してなることを特徴とする潤滑油組成物。
(C)下記式(2)に示される硫黄化合物のうち少なくとも1種とを配合してなり、
当該組成物の粘度指数が160以上であることを特徴とする潤滑油組成物。
本実施形態の潤滑油組成物は、基油に、(A)特定のポリアクリレート系化合物、および、(B)特定のリン化合物を配合してなり、さらに(C)成分、(D)成分、あるいは(E)成分を配合することが好ましい。以下、詳細に説明する。
本発明の潤滑油組成物(以下、「本組成物」ともいう。)に用いる基油は、40℃における動粘度が1mm2/s以上200mm2/s以下である。40℃における動粘度が1mm2/s以上であると蒸発損失が少なく、200mm2/s以下であると粘性抵抗による動力損失が大きくなりすぎることもない。より好ましくは40℃における動粘度は、10mm2/s以上100mm2/s以下の範囲のものである。
また、合成油としては、例えば、ポリα-オレフィン(PAO)、α-オレフィンコポリマー、ポリブテン、アルキルベンゼン、ポリオールエステル、二塩基酸エステル、ポリオキシアルキレングリコール、ポリオキシアルキレングリコールエステル、ポリオキシアルキレングリコールエーテル、ヒンダードエステル、およびシリコーンオイルなどが挙げられる。さらには、スラックワックスやGTL WAXの異性化物なども挙げられる。
中でも、水素化精製鉱油、水素化分解鉱油、スラックワックスやGTL WAXの異性化物(ワックス異性化鉱油)、およびポリα-オレフィンが好適である。
本発明においては、基油として、上記鉱油を1種用いてもよく、2種以上組み合わせて用いてもよい。また、上記合成油を1種用いてもよく、2種以上組み合わせて用いてもよい。さらには、鉱油1種以上と合成油1種以上とを組み合わせて用いてもよい。
本組成物における(A)成分は、質量平均分子量が10,000以上100,000以下のアクリレート系化合物である。質量平均分子量が前記下限未満では、省燃費性が悪化し、他方、前記上限を超えると、潤滑油組成物のせん断安定性が低下する。また、この(A)成分の質量平均分子量は、15,000以上80,000以下であることがより好ましく、20,000以上75,000以下であることが特に好ましい。
本組成物においては、(A)成分として前記したポリアクリレート系化合物を1種単独で用いてもよく、2種以上を組合せて用いてもよい。
前記(A)成分の配合量は、組成物全量基準で、0.1質量%以上20質量%以下が好ましく、0.2質量%以上15質量%以下がより好ましい。配合量が前記下限値以上であると、十分な粘度指数向上効果が得られ、他方、前記上限値以下であると、潤滑油組成物のせん断安定性やピストン清浄性が向上する。
本組成物において(B)成分として用いられるリン化合物は、下記式(1)で示されるトリアリールフォスフェート、あるいはトリアリールチオフォスフェートである。
前記式(1)で示されるリン化合物は、酸価が10mgKOH/g以下のものが好ましい。酸価が10mgKOH/g以下であると、潤滑油組成物としたときに耐熱性がより優れ、スラッジの発生を抑制することができる。酸価は、より好ましくは5mgKOH/g以下、さらに好ましくは1mgKOH/g以下である。なお、酸価は、JIS K2501によって測定した値である。
前記式(1)で示されるリン化合物としては、トリフェニルフォスフェート、トリクレジルフォスフェート、トリフェニルチオフォスフェート、トリクレジルチオフォスフェート、モノ(ジ)-t-ブチルトリフェニルフォスフェート、および、トリフェニルホスホロチオエート等が挙げられる。
本組成物において(C)成分として用いられる硫黄化合物としては、下記式(2)に示されるジチオリン酸エステル化合物を用いることが好ましい。
式(2)において、R1の炭素数が8より大きい場合は基油に対して溶解不良を起こし易い。R1としては、上記観点から、炭素数1から8までの直鎖又は分岐のアルキレン基であることが好ましく、炭素数2から4までの直鎖又は分岐のアルキレン基であることがより好ましく、分枝鎖アルキレン基であることが更に好ましい。具体的には、-CH2CH2-、-CH2CH(CH3)-、-CH2CH(CH2CH3)-、および、-CH2CH(CH2CH2CH3)-等が好ましく挙げられ、-CH2CH(CH3)-、-CH2CH(CH3)CH2-がより好ましく挙げられる。
また、R2およびR3の各々の炭素数が3より小さい場合は低分子量となるため金属表面への吸着不良を起こし易くなり、8より大きい場合は基油に対して溶解不良を起こし易い。R2およびR3の各々の炭素数は上記観点から、3から8までの直鎖又は分岐のアルキル基が好ましく、炭素数4から6までの直鎖又は分岐のアルキル基がより好ましい。具体的には、プロピル、イソプロピル、ブチル、イソブチル、t-ブチル、ペンチル、イソペンチル、ヘキシル、2-エチルブチル、1-メチルペンチル、1,3-ジメチルブチルおよび2-エチルヘキシルの各基からなる群より選ばれるように選択されることが好ましく、これらのうち、イソブチル、t-ブチルが更に好ましい。
本組成物においては、(C)成分として前記したジチオリン酸エステル化合物を1種単独で用いてもよく、2種以上を組合せて用いてもよい。
前記(C)成分の配合量は、組成物全量基準で、0.01質量%以上2.0質量%以下が好ましく、0.02質量%以上0.5質量%以下がより好ましい。
本組成物では、(D)成分として、下記式(3)で示されるリン酸エステルでアミン化合物と反応させたアミン塩化合物を用いることが好ましい。
アミン塩を構成するアミン化合物としては、炭素数が4から60までである、モノ置換アミン、ジ置換アミンおよびトリ置換アミンを用いることができる。
モノ置換アミンの例としては、ブチルアミン、ペンチルアミン、ヘキシルアミン、シクロヘキシルアミン、オクチルアミン、ラウリルアミン、ステアリルアミン、オレイルアミン、ベンジルアミンなどを挙げることができ、ジ置換アミンの例としては、ジブチルアミン、ジペンチルアミン、ジヘキシルアミン、ジシクロヘキシルアミン、ジオクチルアミン、ジラウリルアミン、ジステアリルアミン、ジオレイルアミン、ジベンジルアミンなどを挙げることができ、トリ置換アミンの例としては、トリブチルアミン、トリペンチルアミン、トリヘキシルアミン、トリシクロヘキシルアミン、トリオクチルアミン、トリラウリルアミン、トリステアリルアミン、トリオレイルアミン、トリベンジルアミンなどを挙げることができる。さらにアルカノールアミン、例えばステアリル・モノエタノールアミン、デシル・モノエタノールアミン、ヘキシル・モノプロパノールアミン、ベンジル・モノエタノールアミン、フェニル・モノエタノールアミン、トリル・モノプロパノールアミン、ジオレイル・モノエタノールアミン、ジラウリル・モノプロパノールアミン、ジオクチル・モノエタノールアミン、ジヘキシル・モノプロパノールアミン、ジブチル・モノプロパノールアミン、オレイル・ジエタノールアミン、ステアリル・ジプロパノールアミン、ラウリル・ジエタノールアミン、オクチル・ジプロパノールアミン、ブチル・ジエタノールアミン、ベンジル・ジエタノールアミン、フェニル・ジエタノールアミン、トリル・ジプロパノールアミン、キシリル・ジエタノールアミン、トリエタノールアミン、トリプロパノールアミンなどを挙げることができる。
これらのアミン化合物は、1種を単独で用いてもよく2種以上を組み合わせて用いてもよい。
前記式(3)で示されるリン酸エステルとアミン化合物を反応させたアミン塩化合物としては、ビス(1、3-ジメチルブチル)フォスフェートドデシルアミン、ビス(n-オクチル)フォスフェート・ビス(n-デカニル)フォスフェートドデシルアミン、2-エチルヘキシルアシッドフォスフェートオレイルアミン、2-エチルヘキシルアシッドフォスフェートココナツアミン等が挙げられる。
本組成物においては、(D)成分として前記したリン酸エステルとアミン化合物を反応させたアミン塩化合物中から1種単独で用いてもよく、2種以上を組合せて用いてもよい。
前記(D)成分の配合量は、組成物全量基準で、0.005質量%以上0.5質量%以下が好ましく、0.01質量%以上0.1質量%以下がより好ましい。
本組成物において(E)成分として用いられる硫黄化合物は、下記式(4)に示されるチオリン酸化合物を用いることが好ましい。
このような硫黄化合物は、分子中に硫黄原子とリン原子を有するため、耐スコーリング性などの耐摩耗性を高めることができる。具体的には、チオリン酸エステル化合物やジチオリン酸エステル化合物が挙げられる。
チオリン酸エステル化合物としては、たとえば、トリブチルホスフォロチオネート、トリペンチルホスフォロチオネート、トリヘキシルホスフォロチオネート、トリヘプチルホスフォロチオネート、トリオクチルホスフォロチオネート、トリノニルホスフォロチオネート、トリデシルホスフォロチオネート、トリウンデシルホスフォロチオネート、トリドデシルホスフォロチオネート、トリトリデシルホスフォロチオネート、トリテトラデシルホスフォロチオネート、トリペンタデシルホスフォロチオネート、トリヘキサデシルホスフォロチオネート、トリヘプタデシルホスフォロチオネート、トリオクタデシルホスフォロチオネート、トリオレイルホスフォロチオネート、トリフェニルホスフォロチオネート、トリクレジルホスフォロチオネート、トリキシレニルホスフォロチオネート、クレジルジフェニルホスフォロチオネート、キシレニルジフェニルホスフォロチオネート、トリス(n-プロピルフェニル)ホスフォロチオネート、トリス(イソプロピルフェニル)ホスフォロチオネート、トリス(n-ブチルフェニル)ホスフォロチオネート、トリス(イソブチルフェニル)ホスフォロチオネート、トリス(s-ブチルフェニル)ホスフォロチオネート、およびトリス(t-ブチルフェニル)ホスフォロチオネート等が挙げられる。
発明の効果の観点からは、チオリン酸エステル化合物よりも、ジチオリン酸エステル化合物が好ましい。
さらに本組成物の性能を向上させるために、油性剤、分散剤、防錆剤、金属不活性化剤、防食剤、酸化防止剤、抗乳化剤および消泡剤などの公知の添加剤を、本発明の目的を損なわない範囲で適宜配合することができる。
金属不活性化剤、防食剤としては、ベンゾトリアゾール、チアジアゾールなどを挙げることができる。これら金属不活性化剤、防食剤の好ましい配合量は、組成物全量基準で、0.005質量%以上1質量%以下程度であり、より好ましくは0.007質量%以上0.5質量%以下である。
アミン系酸化防止剤としては、例えば、モノオクチルジフェニルアミン、モノノニルジフェニルアミンなどのモノアルキルジフェニルアミン系化合物、4,4’-ジブチルジフェニルアミン、4,4’-ジペンチルジフェニルアミン、4,4’-ジヘキシルジフェニルアミン、4,4’-ジヘプチルジフェニルアミン、4,4’-ジオクチルジフェニルアミン、4,4’-ジノニルジフェニルアミンなどのジアルキルジフェニルアミン系化合物、テトラブチルジフェニルアミン、テトラヘキシルジフェニルアミン、テトラオクチルジフェニルアミン、テトラノニルジフェニルアミンなどのポリアルキルジフェニルアミン系化合物、α-ナフチルアミン、フェニル-α-ナフチルアミン、ブチルフェニル-α-ナフチルアミン、ペンチルフェニル-α-ナフチルアミン、ヘキシルフェニル-α-ナフチルアミン、ヘプチルフェニル-α-ナフチルアミン、オクチルフェニル-α-ナフチルアミン、ノニルフェニル-α-ナフチルアミンなどのナフチルアミン系化合物が挙げられる。
消泡剤としては、高分子シリコーン系消泡剤、ポリアクリレート系消泡剤を用いることができる。消泡剤の好ましい配合量は、組成物全量基準で、0.0001質量%以上0.5質量%以下であり、0.0005質量%以上0.3質量%以下配合することがより好ましい。
以上の配合で調製された本組成物は、粘度指数は、160以上である。粘度指数が前記下限未満であると、粘度の温度依存性が大きくなり好ましくない。なお、粘度指数は、JIS K 2283の方法により測定できる。より好ましくは粘度指数は、165以上である。
次に、本発明に係る第二実施形態の潤滑油組成物を説明する。
また、以降の説明に当たり、上記第一実施形態と同一の構成については、その説明を省略又は簡略化する。
本組成物は、基油に、(A)特定のポリアクリレート系化合物、(B)特定のリン化合物、および、(C)成分を配合してなり、さらに(D)成分、あるいは(E)成分を配合することが好ましい。以下、詳細に説明する。
本組成物において(C)成分として用いられる硫黄化合物としては、上記式(2)に示されるジチオリン酸エステル化合物を用いる。
本組成物における前記(C)成分の配合量は、組成物全量基準で、0.01質量%以上2.0質量%以下が好ましく、0.02質量%以上0.5質量%以下とすることがより好ましい。
(C)成分以外は、上述の第一実施形態と同一構成であるので、その説明を省略する。
なお、(C)成分と(B)成分とを併用する場合、(B)成分の配合量は、組成物全量基準で0.05質量%以上0.5質量%以下とすることが好ましい。
(1)耐摩耗性(FZG耐スコーリング試験)
FZGギヤ試験機を用い、ISO 14635-1に準拠し、規定に沿って段階的に荷重を上げ、スコーリングが発生した荷重のステージで表示した。
(2)静止摩擦係数
建設機械協会が制定した、建設機械用油圧作動油の摩擦特性試験法(JCMAS P047)に規定されたSAE No2摩擦試験により1000サイクル時における静止摩擦係数を測定した。
(3)耐熱性(酸化試験後のスラッジ量) JIS K2514-1996に準じる内燃機関用潤滑油酸化安定度試験(ISOT)により、発生したスラッジ量をミリポアフィルターで捕集してその量(mg/100mL)を測定した。試験温度は150℃であり、試験時間は168時間である。
(4)高圧ベーンポンプ試験
ベーンポンプとして、「TOKIMEC社製F11-SQP2-12」を使用して油圧回路を形成し、油温60℃にて、回転数:1200rpm、吐出圧力:14.0MPaの条件で2時間定常化運転を行い、その後1時間流量計測した。
なお、管路長(ポンプ吐出部からリリーフ弁間:1.2m,内径25.44mm,ブリジストンフローテック社製PA2816-77耐圧ゴムホース、サクション側:1.8m,内径38.1mm、ブリジストンフローテック社製VW24 耐圧ゴムホース),タンク容量100Lであり、積算流量計は日東精工社製 RSA0040A0FBMD3450010R型を使用した。
表1および表2に示すように、基油に各添加剤を配合し、実施例および比較例の試料油を調製し、それぞれの性能を評価した。結果を表1および表2に示す。
2)基油2:パラフィン系鉱油、40℃動粘度36.8mm2/s、100℃動粘度6.52mm2/s、粘度指数131、硫黄分0.01質量%未満
3)基油3:パラフィン系鉱油、40℃動粘度45.1mm2/s、100℃動粘度7.13mm2/s、粘度指数118、硫黄分0.01質量%未満
4)基油4:パラフィン系鉱油、40℃動粘度90.5mm2/s、100℃動粘度10.9mm2/s、粘度指数105、硫黄分0.01質量%未満
5)高分子成分:エチレンプロピレンコポリマー、40℃動粘度37500mm2/s、100℃動粘度2000mm2/s、粘度指数300、質量平均分子量(Mw)(VPO法)2982、硫黄分0.01質量%未満
6)ポリアクリレート系化合物1((A)成分):PMAポリアクリレート、100℃動粘度852mm2/s、質量平均分子量(Mw)37000
7)ポリアクリレート系化合物2((A)成分):PMAポリアクリレート、100℃動粘度490mm2/s、質量平均分子量(Mw)30000
8)ポリアクリレート系化合物3((A)成分):PMAポリアクリレート、100℃動粘度382mm2/s、質量平均分子量(Mw)69000
9)リン化合物1((B)成分):トリクレジルフォスフェート
10)リン化合物2((B)成分):モノ(ジ)-t-ブチルトリフェニルフォスフェート
11)リン化合物3((B)成分):トリフェニルホスホロチオエート
12)リン酸エステルアミン塩1((D)成分)
13)リン酸エステルアミン塩2((D)成分)
14)硫黄化合物1((E)成分):ジチオリン酸化合物
15)硫黄化合物2((C)成分):ジチオリン酸エステル化合物
16)油性剤・分散剤1:アルキルコハク酸イミド(ビスタイプ)
17)油性剤・分散剤2:ポリブテニルコハク酸イミド,ボレート
18)油性剤・分散剤3:ポリイソブテニルコハク酸イミド
19)油性剤・分散剤4:イソステアリン酸の縮合アミド
20)金属不活性化剤・防食剤1:アルケニルコハク酸多価アルコールエステル
21)金属不活性化剤・防食剤2:ソルビタンモノオレート
22)金属不活性化剤・防食剤3:N-ジアルキルアミノメチルベンゾトリアゾール
23)ヒンダードフェノール系酸化防止剤:2,6-ジtert-ブチル-P-クレゾール
24)アミン系酸化防止剤:モノブチルフェニルモノオクチルフェニルアミン
25)抗乳化剤:ポリアレキレングルコール系(ブロック型PAG)
26)消泡剤1:シリコーン系
27)消泡剤2:アクリレート系
28)40℃動粘度:JIS K2283に準拠して測定した。
29)100℃動粘度:JIS K2283に準拠して測定した。
30)粘度指数:JIS K2283に準拠して測定した。
31)質量分子量(Mw):高分子成分についてはVPO法により測定した。また、ポリアクリレート系化合物については、GPC(ゲルパーミエーションクロマトグラフィー)法にて測定したPS換算値である。
32)S分:JIS K2541に準拠して測定した。
33)P分:ICP(高周波誘導結合プラズマ発光分析)法にて、試料を溶媒希釈して測定した。
34)N分:JIS K2609に準拠して測定した。
35)酸価、塩基価:JIS K2501に規定される「潤滑油中和試験方法」に準拠し、指示薬法、電位差法、塩酸法、あるいは、過塩素酸-逆滴定法により測定した。なお、表中において、(指)は指示薬法、(電)は電位差法、(塩)は塩酸法、(過)は過塩素酸-逆滴定法により測定したことを示す。
36)錆止め(人工海水):JIS K2510(B法、人工海水法)に準拠して、測定した。
表1および表2から分かるように、実施例1~6の試料油は、本発明の構成をすべて備えているため、耐摩耗性(FZG耐スコーリング性、静止摩擦係数)、耐熱性(スラッジ発生量)が良好であり、さらに省燃費性(ポンプ全効率)にも優れている。
一方、比較例1,2は、いずれも本発明の構成要素のいずれかが外れており、したがって、性能が実施例のものに比べて劣っている。
Claims (6)
- 請求項1に記載の潤滑油組成物において、
前記(B)成分の配合量が、組成物全量基準で0.5質量%以上1.0質量%以下である
ことを特徴とする潤滑油組成物。 - 40℃における動粘度が1mm2/s以上200mm2/s以下、粘度指数が80以上および硫黄分が0.03質量%未満である基油に、
(A)質量平均分子量10,000以上100,000以下であるポリアクリレート系化合物と、
(B)下記式(1)で示されるリン化合物のうち少なくとも1種と、
(式中、Rは、水素原子または炭素数4以下のアルキル基、Xは酸素原子または硫黄原子を示す。)
(C)下記式(2)に示される硫黄化合物のうち少なくとも1種とを配合してなり、
(式中、R1は、炭素数1から8までの直鎖または分岐のアルキレン基を示し、R2およびR3はそれぞれ炭素数3から20までの炭化水素基を示す。)
該組成物の粘度指数が160以上である
ことを特徴とする潤滑油組成物。 - 請求項1から請求項4までのいずれか1項に記載の潤滑油組成物において、
さらに、(D)下記式(3)で示されるリン酸エステルとのアミン塩化合物および/または、(E)下記式(4)に示される硫黄化合物のうち少なくとも1種とを配合してなる
ことを特徴とする潤滑油組成物。
(式中、R4は、水素原子または炭素数1から18までの炭化水素基、R5はそれぞれ独立に炭素数1から18までの炭化水素基を示す。)
(式中、R6、R7、R9は各々に独立に、炭素数1から18までの直鎖若しくは分岐を有する飽和若しくは不飽和の脂肪族炭化水素基、あるいは、分岐を有してもよい炭素数5から18までの飽和若しくは不飽和の環状炭化水素基である。R8は炭素数1から6までの直鎖あるいは分岐鎖のアルキレン基である。X2、X3、X4は各々独立に2価の酸素原子または硫黄原子である。X1は酸素原子または硫黄原子である。上記式中に硫黄原子は少なくとも一つ含まれる。) - 請求項1から請求項5までのいずれか1項に記載の潤滑油組成物が油圧作動油である
ことを特徴とする潤滑油組成物。
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- 2014-02-10 CN CN201480016928.7A patent/CN105164238B/zh active Active
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JP2022057190A (ja) * | 2020-09-30 | 2022-04-11 | 出光興産株式会社 | 冷凍機油組成物、冷媒潤滑油混合組成物及び冷蔵庫 |
Also Published As
Publication number | Publication date |
---|---|
EP2980194B1 (en) | 2020-04-01 |
AU2018201517A1 (en) | 2018-03-22 |
AU2018201517B2 (en) | 2019-01-24 |
EP2980194A1 (en) | 2016-02-03 |
TW201439307A (zh) | 2014-10-16 |
AU2014245378A1 (en) | 2015-10-15 |
JPWO2014156338A1 (ja) | 2017-02-16 |
EP2980194A4 (en) | 2016-10-19 |
US20160032214A1 (en) | 2016-02-04 |
US10563148B2 (en) | 2020-02-18 |
CN105164238B (zh) | 2021-06-29 |
JP6445425B2 (ja) | 2018-12-26 |
CN105164238A (zh) | 2015-12-16 |
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