WO2014156325A1 - Composition d'huile de graissage - Google Patents

Composition d'huile de graissage Download PDF

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Publication number
WO2014156325A1
WO2014156325A1 PCT/JP2014/052852 JP2014052852W WO2014156325A1 WO 2014156325 A1 WO2014156325 A1 WO 2014156325A1 JP 2014052852 W JP2014052852 W JP 2014052852W WO 2014156325 A1 WO2014156325 A1 WO 2014156325A1
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mass
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oil composition
earth metal
lubricating oil
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PCT/JP2014/052852
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English (en)
Japanese (ja)
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麻里 飯野
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Ｊｘ日鉱日石エネルギー株式会社
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Priority to JP2015508150A priority Critical patent/JPWO2014156325A1/ja
Publication of WO2014156325A1 publication Critical patent/WO2014156325A1/fr

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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
    • C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • 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
    • C10M2215/28—Amides; Imides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046—Overbasedsulfonic acid salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/045—Metal containing thio derivatives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • 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
    • C10M2223/049—Phosphite
    • 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
    • C10M2227/00—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
    • C10M2227/06—Organic compounds derived from inorganic acids or metal salts
    • C10M2227/066—Organic compounds derived from inorganic acids or metal salts derived from Mo or W
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/12—Groups 6 or 16
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/071—Branched chain compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/54—Fuel economy
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • 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
    • C10N2060/00—Chemical after-treatment of the constituents of the lubricating composition
    • C10N2060/14—Chemical after-treatment of the constituents of the lubricating composition by boron or a compound containing boron

Definitions

  • the present invention relates to a lubricating oil composition, in particular, an engine lubricating oil composition, and more particularly to a lubricating oil composition that is excellent in friction characteristics of a wet clutch in addition to low fuel consumption, and that is particularly suitable for a four-cycle engine for a motorcycle. It is.
  • the lubricating oil used in a four-cycle engine for a motorcycle in which a transmission and a power transmission part (wet clutch) of the transmission are housed in a single crankcase are required for both engine oil and transmission oil. It is necessary to satisfy the performance, and the demand for fuel saving performance is increasing as described above.
  • the above-described engine, drive unit, and four-cycle engine for motorcycles are further reduced in size, weight, and output, and accordingly, the heat load on the lubricating oil used in these engines is higher than ever and the high temperature is increased. There is also a tendency for fuel efficiency to be emphasized.
  • a four-cycle engine for a motorcycle has a wider engine speed range than that of a four-wheeled vehicle, and has a high normal speed.
  • the engine oil temperature fluctuates greatly from low to high depending on the driving conditions.
  • Patent Document 1 As a fuel-saving engine oil, for example, in Patent Document 1, a specific additive (alkaline earths) is added to a base oil having a kinematic viscosity at 100 ° C. of 2 to 8 mm 2 / s and an aromatic content of 15% by mass.
  • Engine oil compositions containing specific amounts of metal salicylate detergents, molybdenum dithiocarbamate friction reducers and the like have been proposed.
  • Patent Document 2 a specific additive (zinc dialkyldithiophosphate, metal-based cleaning agent) is added to a base oil having a kinematic viscosity at 100 ° C. of 3 to 10 mm 2 / s or a mixed base oil containing 15% by mass or more thereof.
  • a four-cycle engine oil composition for motorcycles containing an agent, a friction modifier and the like has been proposed.
  • this four-cycle engine oil composition for two-wheeled vehicles has a low fuel consumption and an excellent fuel economy performance at an engine speed of 3000 to 13000 rpm.
  • the sulfurized oxymolybdenum dioctyldithiophosphate as a friction modifier is In consideration of clutch slip, only 0.62% by mass (when the concentration of molybdenum element is 10% by mass, the amount converted to molybdenum element is 620 ppm by mass) is added, resulting in a somewhat inferior fuel economy effect. was there.
  • the JASO motorcycle four-cycle oil standard (T903: 2011) classifies engine oil performance into three types, MA1, MA2 and MB, based on clutch performance, and requires appropriate use according to the vehicle. Therefore, a four-cycle engine oil for two-wheeled vehicles that is widely used and that is excellent in fuel efficiency at medium to high temperatures and excellent in friction characteristics of a wet clutch is desired.
  • Molybdenum compounds that are highly effective in reducing the friction coefficient between metals are often used for fuel-saving oils.
  • a lubricating oil simply containing a large amount of a molybdenum compound has a low friction coefficient of the clutch, and cannot retain the clutch performance for a motorcycle described above. Further, when the amount of molybdenum used is increased, the effect of reducing friction is increased.
  • a molybdenum compound is blended with a low-viscosity base oil, a problem occurs that precipitates are generated even during long-term storage. It is an object of the present invention to provide a lubricating oil composition that has excellent fuel efficiency, satisfies clutch performance, and does not generate precipitates even during long-term storage.
  • a lubricating oil composition having a specific configuration satisfies a clutch performance while containing a larger amount of a molybdenum compound, and can be used during long-term storage.
  • the inventors have found that no precipitate is generated, the product has an excellent long life, and an excellent fuel efficiency, and the present invention has been completed.
  • the present invention provides (A) a lubricating base oil having a kinematic viscosity at 100 ° C. of 2.5 to 20 mm 2 / s and an aromatic content of two or more rings of 0.4% by mass or more. 750 to 1000 ppm by mass, based on the total amount of the organomolybdenum compound based on the composition, (C) boron-containing succinimide and / or succinimide not containing boron, (D) alkaline earth metal detergent (E) A lubricating oil composition containing zinc dithiophosphate.
  • the lubricating oil composition preferably further contains at least one selected from (F) phosphoric esters, phosphites, and salts thereof.
  • the kinematic viscosity at 100 ° C. of the lubricating base oil (A) of the lubricating oil composition is preferably 3 to 9 mm 2 / s.
  • (C) boron-containing succinimide and / or succinimide not containing boron in the lubricating oil composition is preferably 0.08 to 0.3% by mass in terms of nitrogen element.
  • the (D) alkaline earth metal detergent in the lubricating oil composition is preferably 0.01 to 0.16% by mass in terms of alkaline earth metal element.
  • the (E) zinc dithiophosphate of the lubricating oil composition preferably contains 0.01 to 0.1% by mass in terms of zinc element.
  • the (F) (sub) phosphates of the lubricating oil composition contain at least one selected from phosphoric esters, phosphites and salts thereof in an amount of 0.1% by mass in terms of phosphorus element. The following is preferable. Further, the sulfated ash content of the lubricating oil composition is preferably 1% by mass or less.
  • the lubricating oil composition of the present invention has an excellent effect that it has excellent fuel efficiency, is satisfactory in clutch performance, and does not generate precipitates even after long-term storage.
  • the lubricating base oil (A) in the present invention has a kinematic viscosity at 100 ° C. of 2.5 to 20 mm 2 / s and an aromatic content of 2 or more rings of 0.4% by mass or more. It is not particularly limited, and any mineral oil or synthetic oil can be used as long as it is usually used as a lubricating base oil for engine oil compositions.
  • the kinematic viscosity at 100 ° C. of the lubricating base oil (A) is preferably in the range of 3 to 9 mm 2 / s, more preferably 3.5 mm 2 / s or more, and still more preferably 4.0 mm.
  • kinematic viscosity at 100 ° C. is less than 2.5 mm 2 / s, the clutch performance is lowered, and precipitates are likely to be generated during long-term storage, and when it exceeds 20 mm 2 / s, the fuel efficiency is reduced. In addition, the low temperature viscosity characteristics deteriorate.
  • the aromatic content of two or more rings in the lubricating base oil (A) is preferably 0.5% by mass or more, more preferably 0.6% by mass or more.
  • the aromatic content of two or more rings of the lubricating base oil (A) is less than 0.4% by mass, the high temperature cleanability and coking resistance (heat resistance) of the lubricating oil composition cannot be sufficiently improved.
  • the aromatic content of the two or more rings is preferably 10% by mass or less, more preferably 5% by mass or less, and particularly preferably 1% by mass or less.
  • the kinematic viscosity at 100 ° C. means the kinematic viscosity at 100 ° C.
  • the lubricating base oil (A) of the present invention preferably has a viscosity index of 80 or more, more preferably 85 or more, and particularly preferably 90 or more.
  • the viscosity index of the base oil is less than 80, the viscosity at a low temperature increases and the startability may be deteriorated.
  • the viscosity index means a viscosity index measured in accordance with JIS K2283-1993.
  • the NOACK evaporation amount of the lubricating base oil (A) of the present invention is preferably 20% by mass or less, more preferably 16% by mass or less, and particularly preferably 10% by mass or less.
  • the lubricating oil has a smaller evaporation loss under high temperature conditions and can avoid adverse effects due to accumulation in the exhaust gas purification device, the piston and the combustion chamber. It becomes possible to obtain a composition.
  • the NOACK evaporation amount referred to here is the evaporation amount when 60 g of a lubricating oil sample is evaporated under the conditions of 250 ° C., ⁇ 20 mmH 2 O for 1 hour in accordance with CEC L-40-T-87. Means.
  • the above-described mineral base oil or synthetic base oil can be used alone, and two or more mineral base oils, Alternatively, it may be a mixture of two or more kinds of synthetic base oils, and may be a mixture of mineral oil base oils and synthetic base oils. And the mixing ratio of 2 or more types of base oil in the said mixture can be chosen arbitrarily.
  • mineral base oils lubricating oil fractions obtained by subjecting crude oil to atmospheric distillation and reduced pressure distillation are subjected to solvent deburring, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid Examples thereof include paraffinic and naphthenic lubricating base oils and the like, which are refined by appropriately combining purification treatments such as washing and clay treatment.
  • Synthetic base oils include poly- ⁇ -olefins (eg polybutene, 1-octene oligomers, 1-decene oligomers, ethylene-propylene oligomers) or their hydrides, isobutene oligomers or their hydrides, isoparaffins, alkylbenzenes, alkyls Naphthalene, diesters (eg, dibutyl maleate, ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sebacate), co-weight of ⁇ -olefin and diester Coalesced, polyol esters (eg, trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol-2-ethylhexanoate, pentaerythr
  • the lubricating base oil (A) of the present invention comprises a base oil (A-1) having a saturated hydrocarbon content of 90% or more and a base oil (A-2) having a saturated hydrocarbon content of less than 90% by mass. It preferably consists of a mixture.
  • the kinematic viscosity at 100 ° C. of the base oil (A-1) is preferably 2.0 mm 2 / s or more, more preferably 3.0 mm 2 / s or more, and more preferably 3.5 mm 2 / s. s or more, particularly preferably 4.0 mm 2 / s or more.
  • 13 mm ⁇ 2 > / s or less is preferable, More preferably, it is 10 mm ⁇ 2 > / s or less, More preferably, it is 8 mm ⁇ 2 > / s or less, Especially preferably, it is 7 mm ⁇ 2 > / s or less.
  • the base oil (A-1) exceeds 13 mm 2 / s, the low-temperature viscosity characteristics deteriorate, whereas when the kinematic viscosity is less than 2.0 mm 2 / s, the lubrication site Insufficient oil film formation at this point results in poor lubricity and increases the evaporation loss of the lubricating base oil.
  • the base oil (A-1) is preferably one classified into group II and group III based on the base oil classification by API (American Petroleum Institute), or a base oil obtained by isomerizing wax.
  • the saturated hydrocarbon content means a value measured by ASTM D-2007.
  • the method for producing the base oil (A-1) is not particularly limited, but atmospheric residual oil obtained by atmospheric distillation of crude oil is desulfurized, hydrocracked, and fractionated to a set viscosity grade.
  • the residual oil is preferably dewaxed or catalytically dewaxed, and if necessary, further extracted with a solvent and hydrogenated to form a base oil.
  • the above base oil (A-1) has also been subjected to a process such as solvent refining and hydrorefining after solvent distillation under reduced pressure and fractional distillation to the required viscosity grade
  • GTL produced by the petroleum wax isomerized lubricating base oil obtained by hydroisomerizing petroleum wax that is secondary to the dewaxing process, the Fischer-Tropsch process, etc.
  • GTL wax isomerized lubricating base oils and the like produced by a technique of isomerizing WAX (gas-trimmed wax).
  • WAX gas-trimmed wax
  • The% C A of the base oil (A-1), is not particularly limited, is preferably less than 3, more preferably 2 or less, even more preferably 1 or less, and most preferably substantially 0 is there. If it exceeds 10, the improvement of heat resistance, which is one of the objects of the present invention, becomes insufficient. Note that the% C A dove means a value measured by a method in accordance with ASTM D3238-85 (n-d-M ring analysis).
  • the sulfur content of the base oil (A-1) is not particularly limited, but is 0.03% by mass or less in one embodiment, and 0.01% by mass or less in another embodiment. In yet another embodiment, the base oil (A-1) is substantially free of sulfur.
  • the smaller the sulfur content the higher the degree of purification, and the problem of sludge solubility is less likely to occur.
  • the method for measuring the sulfur content is not particularly limited, but JIS K2541-1996 is generally used.
  • the blending amount of the base oil (A-1) is preferably 45% by mass or more, more preferably 60% by mass or more, still more preferably 70% by mass or more, and most preferably based on the total amount of the base oil. 80% by mass or more. Moreover, Preferably it is 95 mass% or less, More preferably, it is 90 mass% or less.
  • the kinematic viscosity at 100 ° C. of the base oil (A-2) is 3 mm 2 / s or more, preferably 6 mm 2 / s or more, particularly preferably 9 mm 2 / s or more. Moreover, it is 60 mm ⁇ 2 > / s or less, Preferably it is 40 mm ⁇ 2 > / s or less, Most preferably, it is 35 mm ⁇ 2 > / s or less.
  • the kinematic viscosity at 100 ° C. of the base oil (A-2) exceeds 60 mm 2 / s, the workability deteriorates.
  • the kinematic viscosity at 100 ° C. is less than 3 mm 2 / s, Insufficient oil film formation results in poor lubricity and increases the evaporation loss of the lubricating base oil.
  • the base oil (A-2) preferably has a saturated hydrocarbon content of less than 90% by mass.
  • the saturated hydrocarbon content of the base oil (A-2) is 90% by mass or more, it becomes difficult to suppress the precipitation of the molybdenum compound.
  • base oil (A-2) generally, atmospheric distillation residue is further distilled under reduced pressure, fractionated to the required viscosity grade, and then subjected to solvent refining, hydrorefining and other processes to remove the solvent.
  • Base oils produced by wax are preferred.
  • the aromatic content of the base oil (A-2) is not particularly limited, but is preferably 3% by mass or more, more preferably 10% by mass or more, still more preferably 20% by mass or more, and most preferably. Is 30% by mass or more. Moreover, 80 mass% or less is preferable, 60 mass% or less is more preferable, and 50 mass% or less is further more preferable.
  • This aromatic content is a value measured according to JIS K2536-1. If the aromatic content is less than 3% by mass, it is difficult to suppress the precipitation of the molybdenum compound. On the other hand, if it exceeds 80% by mass, the heat resistance is lowered and the lubricating oil composition of the present invention cannot exhibit sufficient performance.
  • the aromatic content of two or more rings of the base oil (A-2) is not particularly limited, but is preferably 3% by mass or more, more preferably 5% by mass or more, and still more preferably 10% by mass or more. Yes, and most preferably 30% by mass or more. Moreover, 50 mass% or less is preferable, 45 mass% or less is more preferable, and 40 mass% or less is further more preferable. If the aromatic content of two or more rings is less than 3% by mass, it is difficult to suppress the precipitation of the molybdenum compound of the present invention. On the other hand, if it exceeds 50% by mass, the heat resistance is lowered and the lubricating oil composition of the present invention cannot exhibit sufficient performance.
  • the blending amount of the above base oil (A-2) is preferably 60% by mass or less, more preferably 50% by mass or less, still more preferably 30% by mass or less, and still more preferably based on the total amount of the base oil. Is 20% by mass or less, and most preferably 10% by mass or less. Moreover, 3 mass% or more is preferable on a base oil whole quantity basis, More preferably, it is 5 mass% or more. When it exceeds 60 mass%, heat resistance will fall and sufficient performance as a lubricating oil composition of this invention cannot be exhibited. If it is less than 3%, precipitation of the molybdenum compound cannot be sufficiently suppressed.
  • Examples of the (B) organic molybdenum compound in the present invention include molybdenum dithiocarbamate and molybdenum dithiophosphate.
  • Specific examples of molybdenum dithiocarbamate include compounds represented by the following general formula (1).
  • Specific examples of molybdenum dithiophosphate include compounds represented by the following general formula (2).
  • Preferable examples include a linear or branched alkyl group having 1 to 24 carbon atoms, a cycloalkyl group having 5 to 13 carbon atoms, or a linear or branched alkylcycloalkyl group, each having 3 carbon atoms.
  • the alkyl group or alkenyl group may be primary, secondary, or tertiary.
  • the organic molybdenum compound in the lubricating oil composition of the present invention includes, for example, basic nitrogen compounds such as succinimide, acidic molybdenum compounds such as molybdenum trioxide, and sulfur compounds such as hydrogen sulfide and phosphorus pentasulfide.
  • An organic molybdenum complex which is the reaction product of is also a preferred example.
  • the content of the organomolybdenum compound is 0.075% by mass or more, preferably 0.08% by mass or more, in terms of molybdenum element, based on the total amount of the composition.
  • the content of the organomolybdenum compound is less than 0.075% by mass in terms of molybdenum element, a remarkable fuel saving effect cannot be obtained, while the content of the organomolybdenum compound is 0 in terms of molybdenum element.
  • the amount exceeds 0.1% by mass an improvement in fuel saving effect corresponding to the content cannot be obtained, and the frictional characteristics of the wet clutch are deteriorated.
  • molybdenum dithiophosphate and molybdenum dithiocarbamate are preferably used.
  • the synergistic effect with other components improves fuel economy performance from low to high temperatures, and friction characteristics in wet clutches.
  • molybdenum dithiocarbamate is particularly preferable.
  • R 10 , R 11 and R 12 each independently represent a polybutenyl group, and n represents an integer of 2 to 7.
  • the polybutenyl group represented by R 10 , R 11 and R 12 preferably has a number average molecular weight of 700 or more, more preferably 900 or more, while the number average molecular weight of the polybutenyl group is 3500 or less. It is preferable that there is, more preferably 1500 or less.
  • the number average molecular weight By setting the number average molecular weight to 700 or more, it becomes possible to obtain a lubricating oil composition that is more excellent in cleanliness and dispersibility.
  • the number average molecular weight to 3500 or less it becomes possible to obtain a lubricating oil composition having better low temperature fluidity.
  • the lower limit value of n is 2, preferably 3, while the upper limit value of n is 7, preferably 6.
  • the polybutenyl group can be obtained from polybutene (polyisobutene) obtained by polymerizing a mixture of 1-butene and isobutene or high-purity isobutene with a catalyst such as aluminum chloride or boron fluoride. Those having a vinylidene structure are usually contained in an amount of 5 to 100 mol%. Further, as this polybutene (polyisobutene), it is also possible to use a product obtained by removing a trace amount of remaining fluorine and chlorine by an appropriate treatment method due to the catalyst in the production process.
  • the content of halogen elements such as chlorine is preferably 50 ppm by mass or less, more preferably 10 ppm by mass or less, still more preferably 5 ppm by mass or less, and particularly preferably 1 ppm by mass or less.
  • the method for producing the succinimide represented by the general formula (3) or (4) there is no particular limitation on the method for producing the succinimide represented by the general formula (3) or (4).
  • polybutenyl succinic acid obtained by reacting chlorinated polybutene, preferably polybutene from which chlorine and fluorine have been sufficiently removed, with maleic anhydride at 100 to 200 ° C. is obtained by diethylenetriamine, triethylenetetramine, tetra
  • a method of reacting with a polyamine such as ethylenepentamine or pentaethylenehexamine can be used.
  • the polybutenyl succinic acid may be reacted twice as much as the polyamine (molar ratio).
  • the polybutenyl succinic acid and the polyamine are used. May be reacted in an equal amount (molar ratio).
  • the succinimide not containing boron is, for example, a part of the amino group and / or imino group remaining by acting an oxygen-containing organic compound or the like on the compound represented by the general formula (3) or (4) The whole may be neutralized or amidated.
  • oxygen-containing organic compound examples include formic acid, acetic acid, glycolic acid, propionic acid, lactic acid, butyric acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, undecyl acid, C 1-30 monocarboxylic acids such as lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, margaric acid, stearic acid, oleic acid, nonadecanoic acid, eicosanoic acid; oxalic acid, phthalic acid, trimellitic acid And polycarboxylic acids having 2 to 30 carbon atoms such as pyromellitic acid or their anhydrides or ester compounds; alkylene oxides having 2 to 6 carbon atoms; hydroxy (poly) oxyalkylene carbonates, and the like.
  • an oxygen-containing organic compound is allowed to act, for example, when a part or all
  • R 13 represents a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, an alkenyl group, an alkoxy group, or a hydroxy (poly) oxyalkylene group represented by —O— (R 14 O) m H
  • R 14 Represents an alkylene group having 1 to 4 carbon atoms
  • m represents an integer of 1 to 5.
  • the boron-containing succinimide as the component (C) is obtained by allowing a boron compound to act on the compound of the general formula (3) or (4).
  • the boron compound include boric acid, borates, and borate esters.
  • Specific examples of boric acid include orthoboric acid, metaboric acid, and tetraboric acid.
  • Examples of borates include alkali metal salts, alkaline earth metal salts, and ammonium salts of boric acid.
  • the boron-containing succinimide used in the present invention is not particularly limited in the mass ratio (B / N ratio) between the boron content and the nitrogen content, but is preferably 0.2 or more, more preferably 0.3 or more, More preferably, it is 0.5 or more, while it is preferably 1.2 or less, more preferably 1 or less, and still more preferably 0.9 or less.
  • B / N ratio is less than 0.2, the effect of the present invention is small.
  • the B / N ratio exceeds 1.2, the oxidation stability is inferior.
  • the boron-containing succinimide and the mono- or bissuccinimide not containing boron can be used alone, but the friction characteristics in the wet clutch can be further improved. It is preferable to use the boron-containing succinimide alone or in combination with the boron-containing succinimide and the mono- and / or bis-succinimide not containing boron.
  • a preferable mixing ratio (mass ratio) when using a boron-containing succinimide and a succinimide not containing boron is 100: 0 to 20:80 for the former: the latter, more preferably 90: 10-40 : 60, particularly preferably 70:30 to 45:55.
  • the content of the component (C) in the present invention is preferably 0.08% by mass or more, more preferably 0.09% by mass or more in terms of nitrogen element, based on the total amount of the composition, while preferably 0%. It is 0.3 mass% or less, More preferably, it is 0.2 mass% or less.
  • the content of component (C) is less than 0.08% by mass in terms of nitrogen element, based on the total composition, the fuel economy at medium and high temperatures and the friction characteristics in wet clutches are not sufficiently improved.
  • the content exceeds 0.3% by mass in terms of nitrogen element based on the total amount of the composition, there is a risk that fuel economy, low temperature viscosity characteristics and demulsibility may deteriorate. It is not preferable.
  • the content of the boron-containing succinimide is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, still more preferably in terms of boron element based on the total composition. 0.02% by mass or more.
  • boron element based on the total amount of the composition it is preferably 0.2% by mass or less, more preferably 0.1% by mass or less, still more preferably 0.08% by mass or less, and particularly preferably 0.05% by mass. It is as follows.
  • the mass ratio of the nitrogen element equivalent of the component (C) to the molybdenum element equivalent of the component (B) is preferably 1.6 or more, and is 1.8 or more. It is more preferable that it is 2.1 or more. On the other hand, the mass ratio is preferably 100 or less, more preferably 10 or less, further preferably 5 or less, and particularly preferably 4 or less. If the mass ratio is less than 1.6, the fuel saving performance particularly at high temperatures may be reduced, and the friction characteristics of the wet clutch may not be sufficiently improved. On the other hand, if the mass ratio exceeds 100, sufficient fuel saving performance may be obtained. Each of them is not preferable because it may not be obtained.
  • the alkaline earth metal detergent as component (D) includes alkaline earth metal sulfonates, alkaline earth metal phenates and alkaline earth metal salicylates. In the present invention, one or two or more alkaline earth metal detergents selected from the group consisting of these can be used.
  • 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 1500, preferably 400 to 700, particularly magnesium salts and / or calcium. It is a salt, and a calcium salt is preferably used.
  • Specific examples of the alkyl aromatic sulfonic acid include so-called petroleum sulfonic acid and synthetic sulfonic acid. As said petroleum sulfonic acid, what sulfonated the alkyl aromatic compound of the lubricating oil fraction of mineral oil, what is called mahoganic acid etc. byproduced at the time of white oil manufacture are generally used.
  • the synthetic sulfonic acid for example, a straight chain obtained by by-product from an alkylbenzene production plant used as a raw material of a detergent or by alkylating an oligomer of an olefin having 2 to 12 carbon atoms (ethylene, propylene, etc.) with benzene.
  • a sulfonated alkylbenzene having a linear or branched alkyl group or a sulfonated alkylnaphthalene such as dinonylnaphthalene is used.
  • the sulfonating agent for sulfonating these alkyl aromatic compounds is not particularly limited, but fuming sulfuric acid or sulfuric anhydride is usually used.
  • alkaline earth metal sulfonates petroleum-based ones are particularly effective in improving fuel efficiency at medium and high temperatures and static friction characteristics in wet clutches, and synthetic ones are fuel-efficient at high temperatures. Since there is an effect of particularly improving the performance, dynamic friction characteristics and braking time characteristics, they can be used as needed.
  • alkaline earth metal phenates include alkylphenols, alkylphenol sulfides, alkaline earth metal salts of Mannich reactants of alkylphenols, particularly magnesium salts and calcium salts. Specific examples include those represented by the following general formulas (6) to (8).
  • R 21 , R 22 , R 23 , R 24 , R 25, and R 26 may be the same or different and each has 4 to 30 carbon atoms.
  • M 1 , M 2 and M 3 each represent an alkaline earth metal, preferably calcium or magnesium, and x represents 1 or 2.
  • these alkaline earth metal phenates can be preferably used because they can improve fuel economy from low to high temperatures and friction characteristics in wet clutches.
  • alkaline earth metal salicylate examples include alkaline earth metal salts of allyl salicylic acid, particularly magnesium salts and calcium salts. Specific examples include compounds represented by the following general formula (9).
  • R 27 represents a linear or branched alkyl group having 4 to 30 carbon atoms, preferably 6 to 18 carbon atoms, and M 4 represents an alkaline earth metal, preferably calcium or magnesium.
  • the alkyl group represented by R 27 may be linear or branched. These may also be primary alkyl groups, secondary alkyl groups or tertiary alkyl groups. In the present invention, it can be preferably used because it can greatly improve the fuel efficiency and the friction characteristics of the wet clutch from low to high temperatures.
  • Alkaline earth metal sulfonates, alkaline earth metal phenates, and alkaline earth metal salicylates can be obtained by directly using the above-mentioned alkyl aromatic sulfonic acids, alkylphenols, alkylphenol sulfides, Mannich reactants of alkylphenols, alkylsalicylic acid, etc., magnesium and / or calcium. It can be obtained by reacting with an alkaline earth metal base such as an alkaline earth metal oxide or hydroxide, or by replacing it with an alkaline earth metal salt such as a sodium salt or potassium salt, and then substituting it with an alkaline earth metal salt.
  • an alkaline earth metal base such as an alkaline earth metal oxide or hydroxide
  • an alkaline earth metal salt such as a sodium salt or potassium salt
  • the above-mentioned neutral alkaline earth metal salts, basic alkaline earth metal salts, overbased (superbasic) alkaline earth metal salts, and mixtures thereof can be used.
  • Alkaline earth metal detergents are usually commercially available in a state diluted with a light lubricating base oil or the like, and are available, but generally the metal content is 1.0 to 20% by mass. Preferably, 2.0 to 16% by mass is used.
  • the total base number of the alkaline earth metal detergent used in the present invention is arbitrary, but the total base number is usually 500 mgKOH / g or less, preferably 150 to 450 mgKOH / g.
  • the total base number means the total base number measured by the perchloric acid method according to 7. “Petroleum products and lubricating oils—neutralization number test method” of JIS K2501 (1992).
  • the content of the alkaline earth metal detergent as the component (D) is preferably 0.01% by mass or more, more preferably 0, in terms of alkaline earth metal element, based on the total amount of the composition. 0.02 mass% or more, more preferably 0.04 mass% or more. On the other hand, it is preferably 0.16% by mass or less, and this enables low ashing, but it is more preferably 0.13% by mass or less, further preferably 0.12% by mass or less, and 0.1% by mass. It is particularly preferable that the content be 07% by mass or less. When the content of the component (D) is less than 0.01% by mass, the fuel-saving performance at medium and high temperatures and the friction characteristics of the wet clutch may be deteriorated. On the other hand, when the content exceeds 0.16% by mass Although the friction characteristics of the wet clutch are improved, low ash oil cannot be obtained, and there is concern about accumulation in the exhaust gas purification device and the combustion chamber, which is not preferable.
  • component (E) zinc dithiophosphate include compounds represented by the following general formula (10).
  • R 31 , R 32 , R 33 and R 34 each independently represent a hydrocarbon group having 1 to 24 carbon atoms.
  • the hydrocarbon group having 1 to 24 carbon atoms represented by R 31 , R 32 , R 33 and R 34 is represented by R 1 , R 2 , R 3 and R 4 in the general formula (1). It is synonymous with the example of a C1-C24 hydrocarbon group, and its preferable example is also the same.
  • the component (E) is preferably a mixture of zinc dithiophosphate having a primary alkyl group (primary ZDTP) and zinc dithiophosphate having a secondary alkyl group (secondary ZDTP).
  • the mixing ratio is preferably the former: the latter is preferably 5:95 to 50:50, and more preferably 10:90 to 40:60.
  • the content of (E) zinc dithiophosphate in the lubricating oil composition of the present invention is preferably 0.1% by mass or less, more preferably 0.08% by mass, in terms of zinc element, based on the total amount of the composition. Hereinafter, it is more preferably 0.06% by mass or less.
  • the content of zinc dithiophosphate is preferably 0.01% by mass or more, more preferably 0.02% by mass or more in terms of zinc element based on the total amount of the composition.
  • the zinc dithiophosphate content exceeds 0.1% by mass in terms of zinc element based on the total amount of the composition, there is a concern about the effect of phosphorus and zinc on the exhaust gas purification device, and fuel consumption performance at high temperatures and
  • the content is less than 0.01% by mass, there is a possibility that the anti-wear performance is inferior, and the sulfur source in the composition is reduced and sliding. Since the production amount of molybdenum disulfide on the surface is reduced, there is a possibility that the fuel saving performance is inferior.
  • the content of the component (E) is 0.01 to 0.06% by mass in terms of zinc element, based on the total amount of the composition, so that it has excellent fuel economy performance from low temperature to high temperature. This is particularly preferable because the friction characteristics of the wet clutch can be remarkably improved.
  • Examples of the phosphorus compound as the component (F) of the present invention include phosphoric acid monoesters, phosphoric acid diesters, phosphoric acid triesters, phosphorous acid monoesters, phosphorous acid diesters, phosphorous acid triesters. Mention may be made of esters, thiophosphates, dithiophosphates, trithiophosphates, thiophosphites, dithiophosphites, trithiophosphites and their salts. The compounds mentioned here usually contain a hydrocarbon group having 2 to 30 carbon atoms, preferably 3 to 20 carbon atoms.
  • salt of the phosphorus compound described above examples include phosphoric acid monoester, phosphoric acid diester, phosphoric acid triester, phosphorous acid monoester, phosphorous acid diester, or phosphorous acid triester, and ammonia and carbon.
  • a salt or zinc obtained by allowing a nitrogen-containing compound such as an amine compound containing only a hydrocarbon group of 1 to 20 or a hydroxyl group-containing hydrocarbon group in the molecule to act to neutralize part or all of the remaining acidic hydrogen; Examples thereof include divalent metal salts such as iron.
  • the component (F) includes phosphoric acid monoesters, phosphoric acid diesters, phosphorous acid monoesters, phosphorous acid diesters, thiophosphoric acid esters, thiophosphorous acid esters, and salts thereof.
  • it is at least one selected from the group consisting of, and more preferably at least one selected from the group consisting of (sub) phosphate monoesters, (sub) phosphate diesters and salts thereof.
  • the carbon number of the hydrocarbon group constituting them is preferably 4 to 20, more preferably 6 to 18.
  • the component (F) in the lubricating oil composition of the present invention is not contained, the effects of the present invention can be obtained, and further reduction in phosphorus is possible.
  • the engine It has been confirmed that when the rotational speed is low (for example, 1,000 rpm) and high (for example, exceeding 10,000 rpm), further fuel saving effect due to the component (F) is exhibited.
  • the component (F) is preferably contained.
  • the content of the component (F) is preferably 0.005% by mass or more, and more preferably 0.01% by mass or more, in terms of phosphorus element, based on the total amount of the composition.
  • the component (F) is preferably 0.1% by mass or less, more preferably 0.08% by mass or less, and still more preferably 0.04% by mass in terms of phosphorus element based on the total amount of the composition. % Or less.
  • the content of the component (F) exceeds 0.1% by mass, not only an effect commensurate with the content cannot be obtained, but also low phosphorus cannot be formed, which is not preferable.
  • the lubricating oil composition of the present invention is excellent in fuel saving performance (low friction performance) and friction characteristics of a wet clutch.
  • a known lubricating oil additive is added to the composition of the present invention.
  • additives include friction modifiers other than the component (B) of the present invention, ashless dispersants other than the component (C) of the present invention, metallic detergents other than the component (D) of the present invention, (E) component or extreme pressure additive other than component (F) and antiwear agent, antioxidant, rust inhibitor, corrosion inhibitor, viscosity index improver, pour point depressant, rubber swelling agent, antifoaming agent and coloring An agent etc. can be mentioned. These can be used alone or in combination of several kinds.
  • the friction modifier other than the component (B) of the present invention for example, aliphatic alcohol, fatty acid, fatty acid metal salt, fatty acid ester, aliphatic amine, aliphatic amine salt, aliphatic amide, etc. can be used. These friction modifiers are slightly inferior in fuel efficiency compared to organic molybdenum compounds. However, even if they are used instead of or in combination with the organic molybdenum compounds of the present invention, the fuel efficiency and friction characteristics of wet clutches are improved. An excellent composition can be obtained.
  • ashless dispersant other than the component (C) of the present invention for example, benzylamine, alkylpolyamine, polybuteneamine, modified products of these boron compounds and sulfur compounds, alkenyl succinates, and the like can be used.
  • Examples of the metal detergent other than the component (D) of the present invention include alkali metal sulfonates, phenates, salicylates, alkali metal or alkaline earth metal naphthenates, and the like. Can be used in combination.
  • Examples of the alkali metal include sodium and potassium.
  • a sulfur compound can be used as the extreme pressure additive and antiwear agent other than the component (E) or component (F) of the present invention.
  • sulfur compounds include disulfides, sulfurized olefins, and sulfurized fats and oils.
  • Any antioxidant can be used as long as it is generally used in lubricating oils, such as phenol compounds and amine compounds.
  • phenol compounds and amine compounds such as 2,6-di-tert-butyl-4 Alkylphenols such as methylphenol, bisphenols such as methylene-4,4-bis (2,6-di-tert-butyl-4-methylphenol), naphthylamines such as phenyl- ⁇ -naphthylamine, dialkyldiphenylamines, Phenothiazines can be used.
  • alkenyl succinic acid for example, alkenyl succinic acid, alkenyl succinic acid ester, polyhydric alcohol ester, petroleum sulfonate, dinonyl naphthalene sulfonate and the like can be used.
  • benzotriazole for example, benzotriazole, thiadiazole, and imidazole compounds can be used.
  • a non-dispersed viscosity index improver or a dispersed viscosity index improver can be used.
  • a non-dispersed or dispersed polymethacrylate or olefin copolymer, or polyisobutene, polystyrene, An ethylene-propylene copolymer, a styrene-diene copolymer and a hydride thereof can be used.
  • weight average molecular weights are generally 5,000 to 1,000,000, but in order to further improve fuel efficiency, the weight average molecular weight is 100,000 to 1,000,000, preferably 200,000 to It is desirable to use the above viscosity index improvers which are 900,000, particularly preferably 400,000 to 800,000.
  • viscosity index improvers which are 900,000, particularly preferably 400,000 to 800,000.
  • a styrene-diene copolymer or a hydride thereof because it is necessary to enhance shear stability.
  • a polymethacrylate polymer for example, a polymethacrylate polymer, an alkylated aromatic compound, a fumarate-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, and the like that are compatible with the lubricating base oil to be used can be used.
  • silicone compounds such as dimethyl silicone and fluorosilicone can be used.
  • the additive amount of these additives is arbitrary, but the content of the antifoaming agent is usually 0.0005 to 0.01% by mass and the content of the viscosity index improver is 0.05 to 20 based on the total amount of the composition.
  • the content of the corrosion inhibitor is 0.005 to 0.2% by mass, and the content of other additives is about 0.05 to 10% by mass, respectively.
  • the lubricating oil composition of the present invention not only has excellent fuel economy at medium to high temperatures and friction characteristics of wet clutches, but also has excellent performance such as anti-wear performance, high-temperature oxidation stability, cleanliness, etc. In addition, it has sufficient performance to meet the JASO motorcycle 4-cycle engine oil standard (JASO T903-2011).
  • One of the regulations requires that the amount of sulfated ash in the composition is 1.2% by mass or less based on the total amount of the composition, but the composition of the present invention has a sulfated ash content of 1.0.
  • a low ash type lubricating oil having a mass% or less, more preferably 0.8 mass% or less, and particularly preferably 0.7 mass% or less can be obtained. This further suppresses abnormal combustion of the engine.
  • sulfate ash means sulfate ash measured in accordance with JIS K2272.
  • the lubricating oil composition of the present invention preferably has a phosphorus element content of 0.12% by mass or less based on the total amount of the composition. It is preferably 0.1% by mass or less, more preferably 0.08% by mass or less, and particularly preferably 0.07% by mass or less. As a result, adverse effects on the exhaust gas purification catalyst can be suppressed.
  • the phosphorus element content can be reduced to 0.05% by mass or less, and a composition excellent in fuel saving performance and friction characteristics in a wet clutch can be obtained.
  • the component (F) When used in a four-cycle engine for a motorcycle, it is preferable that the component (F) is contained because further fuel saving performance can be exhibited in an actual vehicle as described in the section (F).
  • Such a low ash type and low phosphorus type lubricating oil composition of the present invention can greatly reduce the influence on the exhaust gas purification device, and exhaust gas purification devices such as a three-way catalyst, an oxidation catalyst, an EGR device, and a DPF. It can be advantageously used for a vehicle equipped with.
  • the lubricating oil composition of the present invention preferably has a kinematic viscosity at 100 ° C. of 2 mm 2 / s or more, more preferably 3 mm 2 / s or more.
  • the kinematic viscosity at 100 ° C. is preferably 15 mm 2 / s or less, more preferably 10 mm 2 / s or less, further preferably 8.5 mm 2 / s or less, and 7 mm 2 / s or less. Even more preferably, it is most preferably 6.70 mm 2 / s or less.
  • the kinematic viscosity of the lubricating oil composition is less than 2 mm 2 / s, not only a sufficient lubricity cannot be obtained, but the amount of evaporation is large and the oil consumption increases. Moreover, when it exceeds 15 mm ⁇ 2 > / s, it will become difficult to provide fuel-saving performance.
  • Examples 1 to 4 Comparative Examples 1 to 6
  • Lubricating base oils were prepared by blending the base oils having the properties shown in Table 1 in the proportions shown in the upper column of Table 4.
  • 1-ring aromatic content and 2 or more-ring aromatic content were measured by the high performance liquid chromatography (HPLC) on the conditions shown in Table 2.
  • Additives (1) to (5) containing the following compounds were added to the lubricating base oil in the proportions shown in Table 4.
  • Additive (1) (B) Molybdenum dithiocarbamate; in general formula (1), R 1 to R 4 are alkyl groups having 8 or 13 carbon atoms, a and b are 2, and the concentration of molybdenum element is 10.0 mass%
  • Additive (2) ⁇ (C-1) Polybutenyl succinic acid succinimide 32% by mass; nitrogen content 1.8% by mass -(C-2) Borated polybutenyl succinimide 32% by mass; nitrogen content 1.5% by mass, boron content 1.3% by mass -(D) Calcium sulfonate 13% by mass: Total base number 300 mgKOH / g, Ca content 12% by mass (E-1) Zn di- (primary hexyl) dithiophosphate 1% by mass; Zn content 8.4% by mass, phosphorus content 6.6% by mass (E-2) Zn
  • the performance of the engine lubricating oil composition of the present invention was evaluated by the performance evaluation test shown below. (Storage stability test) The sample oil was placed in a high-temperature air tank maintained at 0 ° C. and 60 ° C., and the presence or absence of precipitation after one month was evaluated.
  • the JASO motorcycle 4-cycle engine oil standard stipulates performance classifications for clutch friction characteristics in addition to physicochemical properties suitable for motorcycle 4-cycle engine oil. That is, the dynamic friction coefficient, the static friction coefficient, and the braking time were measured according to test conditions based on JASO T903-2011, and the dynamic friction characteristic index, the static friction characteristic index, and the braking time index were obtained by the following calculation methods. Next, these indexes are classified into MA1, MA2 or MB according to the following Table 3. Compositions classified as MB are low friction oils, indicating that any of the above indices are lower than the standard.
  • Dynamic friction characteristic index 1 + ( ⁇ d (s) ⁇ d (B11)) / ( ⁇ d (A11) ⁇ d (B11)) ⁇ d (s): Dynamic friction coefficient of test oil ⁇ d (A11): Dynamic friction coefficient of JAFRE-A11 (high friction characteristic standard oil) ⁇ d (B11): Dynamic friction of JAFRE-B11 (low friction characteristic standard oil with friction modifier) Coefficients
  • the static friction characteristic index and the braking time index were determined by the same calculation method, and the clutch friction characteristics were determined according to Table 3 above.
  • Examples 1 to 4 within the scope of the present invention are excellent in clutch friction characteristics and storage stability, but when the content of the organomolybdenum compound as component (B) is less than specified in the present invention (comparison) In Example 1), the clutch friction characteristic is MA, and when it is large (Comparative Example 6), the storage stability evaluation is inferior.
  • the lubricating oil composition of the present invention is used for internal combustion engines such as gasoline engines, diesel engines, and gas engines, particularly for internal combustion engines equipped with exhaust gas aftertreatment devices, for drive system devices having a wet clutch, and for four-cycle engines for motorcycles.
  • internal combustion engines such as gasoline engines, diesel engines, and gas engines
  • exhaust gas aftertreatment devices for drive system devices having a wet clutch
  • four-cycle engines for motorcycles.
  • it can also be used for lubricating oils that require fuel-saving properties and lubricating oils that require a friction adjustment function, such as for shock absorbers.

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Abstract

L'invention porte sur une composition d'huile de graissage qui ne subit pas la formation de précipités même lorsqu'elle est stockée pendant longtemps, qui a une excellente performance de faible consommation de carburant et qui a également d'excellentes propriétés de frottement d'embrayage en mode humide. La composition d'huile de graissage selon l'invention comprend : (A) une huile de base d'huile de graissage qui a une viscosité cinématique de 2,5 à 20 mm2/s à 100°C et qui contient un composé aromatique ayant deux ou plus de deux noyaux à hauteur de 0,4 % en masse ou plus ; (B) un composé organique du molybdène à hauteur de 0,075 à 0,1 % en masse en termes de teneur en molybdène élémentaire par rapport à la quantité totale de la composition ; (C) un imide de l'acide succinique contenant du bore et/ou un imide de l'acide succinique ne contenant pas de bore ; (D) un agent de nettoyage de type métal alcalinoterreux ; et (E) du dithiophosphate de zinc.
PCT/JP2014/052852 2013-03-29 2014-02-07 Composition d'huile de graissage WO2014156325A1 (fr)

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JPWO2016114401A1 (ja) * 2015-01-15 2017-10-19 出光興産株式会社 潤滑油組成物
WO2018135645A1 (fr) * 2017-01-19 2018-07-26 出光興産株式会社 Composition lubrifiante

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JP2003041283A (ja) * 2001-07-31 2003-02-13 Nippon Oil Corp 潤滑油組成物
JP2006328265A (ja) * 2005-05-27 2006-12-07 Idemitsu Kosan Co Ltd 潤滑油組成物
JP2008214641A (ja) * 2008-03-27 2008-09-18 Nippon Oil Corp 潤滑油組成物及びその製造方法

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JP2001214184A (ja) * 2000-02-01 2001-08-07 Nippon Mitsubishi Oil Corp 二輪車用４サイクルエンジン油組成物
JP2003041283A (ja) * 2001-07-31 2003-02-13 Nippon Oil Corp 潤滑油組成物
JP2006328265A (ja) * 2005-05-27 2006-12-07 Idemitsu Kosan Co Ltd 潤滑油組成物
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Publication number Priority date Publication date Assignee Title
JPWO2016114401A1 (ja) * 2015-01-15 2017-10-19 出光興産株式会社 潤滑油組成物
WO2018135645A1 (fr) * 2017-01-19 2018-07-26 出光興産株式会社 Composition lubrifiante
CN110168061A (zh) * 2017-01-19 2019-08-23 出光兴产株式会社 润滑油组合物
JPWO2018135645A1 (ja) * 2017-01-19 2019-11-07 出光興産株式会社 潤滑油組成物
EP3572485A4 (fr) * 2017-01-19 2020-11-04 Idemitsu Kosan Co.,Ltd. Composition lubrifiante
JP7058226B2 (ja) 2017-01-19 2022-04-21 出光興産株式会社 潤滑油組成物
CN110168061B (zh) * 2017-01-19 2022-05-17 出光兴产株式会社 润滑油组合物

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