WO2016159006A1 - Composition d'huile lubrifiante - Google Patents

Composition d'huile lubrifiante Download PDF

Info

Publication number
WO2016159006A1
WO2016159006A1 PCT/JP2016/060239 JP2016060239W WO2016159006A1 WO 2016159006 A1 WO2016159006 A1 WO 2016159006A1 JP 2016060239 W JP2016060239 W JP 2016060239W WO 2016159006 A1 WO2016159006 A1 WO 2016159006A1
Authority
WO
WIPO (PCT)
Prior art keywords
viscosity
less
mass
base oil
lubricating
Prior art date
Application number
PCT/JP2016/060239
Other languages
English (en)
Japanese (ja)
Inventor
浩太朗 和田
慎太郎 楠原
松井　茂樹
Original Assignee
Ｊｘエネルギー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｊｘエネルギー株式会社 filed Critical Ｊｘエネルギー株式会社
Priority to US15/561,670 priority Critical patent/US20180072962A1/en
Priority to JP2017510054A priority patent/JPWO2016159006A1/ja
Priority to CN201680005061.4A priority patent/CN107207991A/zh
Publication of WO2016159006A1 publication Critical patent/WO2016159006A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/20—Lubricating compositions characterised by the base-material being a macromolecular compound containing oxygen
    • C10M107/22—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M107/28—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
    • 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
    • C10M101/00—Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • 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
    • C10M139/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00
    • C10M139/06—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing atoms of elements not provided for in groups C10M127/00 - C10M137/00 having a metal-to-carbon bond
    • 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/10—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
    • C10M145/12—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 monocarboxylic
    • C10M145/14—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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/044—Mixtures of base-materials and additives the additives being a mixture of non-macromolecular and macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/003—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/26—Overbased carboxylic acid salts
    • C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • 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
    • C10M2209/0845—Acrylate; Methacrylate used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • 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
    • 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
    • C10M2227/09—Complexes with metals
    • 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
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/74—Noack Volatility
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • C10N2040/26—Two-strokes or two-cycle engines

Definitions

  • the present invention relates to a lubricating oil composition.
  • lubricating oil is used in internal combustion engines, transmissions, and other mechanical devices in order to make their operations smooth.
  • lubricating oil (engine oil) for internal combustion engines is required to have high performance as the performance of the internal combustion engine increases, the output increases, and the operating conditions become severe. Therefore, various additives such as antiwear agents, metal detergents, ashless dispersants, and antioxidants are blended in conventional engine oils in order to satisfy these required performances (for example, Patent Documents 1 to 5 listed below). 3).
  • Patent Documents 1 to 5 listed below listed below. 3
  • the HTHS viscosity at 150 ° C. (“HTHS viscosity” is also referred to as “high temperature high shear viscosity”) is high. It is necessary to increase the shear stability. In order to further improve fuel efficiency while maintaining other practical performances, the kinematic viscosity at 40 ° C, the kinematic viscosity at 100 ° C, and at 100 ° C while maintaining the HTHS viscosity at 150 ° C at a constant level. Although it is effective to lower the HTHS viscosity, it has been very difficult to meet all these requirements with conventional lubricants.
  • the present invention has been made in view of such a situation. While maintaining the HTHS viscosity at 150 ° C. at a constant level, the kinematic viscosity at 40 ° C. and the kinematic viscosity at 100 ° C. are sufficiently increased from the beginning to the long term.
  • An object of the present invention is to provide a lubricating oil composition that is low in performance, excellent in engine friction loss reduction performance, and excellent in fuel economy.
  • the lubricating oil composition of the present invention has a lubricating base oil having a kinematic viscosity at 100 ° C. of 1.0 to 10 mm 2 / s and a% CP of 70 or more, (A)
  • the ratio A / B between the thickening effect A of kinematic viscosity at 100 ° C. represented by the following formula (1) and the thickening effect B of HTHS viscosity at 150 ° C. represented by the following formula (2) is 2
  • A XX 0 (1)
  • A shows the thickening effect of the kinematic viscosity at 100 ° C. of the viscosity index improver
  • X is a reference base oil that is a hydrocracked base oil YUBASE (registered trademark) 4 manufactured by SK Lubricants, Ltd. The kinematic viscosity at 100 ° C.
  • HTHS viscosity (unit: mPa ⁇ s) is indicated, and Y 0 indicates the HTHS viscosity (unit: mPa ⁇ s) of the reference base oil at 150 ° C. ]
  • C Z ⁇ Z 0 (3)
  • C shows the thickening effect of the kinematic viscosity of the viscosity index improver at 150 ° C.
  • Z represents the mixture of the reference base oil and the viscosity index improver 6 mass% at 150 ° C.
  • kinematic viscosity (unit: mm 2 / s) indicates
  • Z 0 is the kinematic viscosity at 0.99 ° C. above the reference base oil: shows the (unit mm 2 / s).
  • the NOACK evaporation amount at 250 ° C. of the lubricating base oil is less than 15 mass%.
  • the NOACK evaporation amount at 250 ° C. of the lubricating base oil is less than 15% by mass
  • the poly (meth) acrylate viscosity index improver has a weight average molecular weight of 10,000 to 400,000. It is.
  • kinematic viscosity at 100 ° C.” means the kinematic viscosity at 100 ° C. as defined in ASTM D-445
  • kinematic viscosity at 150 ° C.” is defined in ASTM D-445. It means kinematic viscosity at 150 ° C.
  • % C P means the percentage of the number of paraffin carbons to the total number of carbons determined by a method (ndM ring analysis) based on ASTM D 3238-85.
  • HTHS viscosity at 150 ° C.” means a high temperature and high shear viscosity at 150 ° C.
  • the NOACK evaporation amount is a value obtained by measuring the evaporation amount of the lubricating oil measured according to ASTM D 5800.
  • (meth) acrylate means acrylate and / or methacrylate
  • poly (meth) acrylate means a polymer containing acrylate monomer units and / or methacrylate monomer units.
  • the ratio A / B of the kinematic viscosity thickening effect A at 100 ° C. represented by the above formula (1) and the HTHS viscosity thickening effect B at 150 ° C. represented by the above formula (2) is fuel saving. It is one of the indices expressing gender.
  • the viscosity index improver having a high ratio A / B is intended to maintain the HTHS viscosity at 150 ° C., the viscosity temperature characteristic is deteriorated, so that sufficient fuel saving performance may not be obtained.
  • the ratio C / B between the kinematic viscosity thickening effect C at 150 ° C. represented by the above formula (3) and the HTHS viscosity thickening effect B at 150 ° C. represented by the above formula (2) is: It is one of the indexes that represent fuel saving performance.
  • the viscosity index improver having a high ratio C / B is intended to maintain the HTHS viscosity at 150 ° C., the viscosity temperature characteristic is deteriorated, so that sufficient fuel saving performance may not be obtained.
  • the (A) viscosity index improver is preferably a viscosity index improver having a weight average molecular weight (Mw) to PSSI ratio (Mw / PSSI) of 1 ⁇ 10 4 or more.
  • the (B) friction modifier is preferably a molybdenum friction modifier.
  • the NOACK evaporation amount at 250 ° C. of the lubricating oil composition is preferably 15% by mass or less.
  • PSSI Perst al., the term "PSSI" in the present application, conforming to ASTM D 6022-01 (Standard Practice for Calculation of Permanent Shear Stability Index), ASTM D 6278-02 (Test Metohd for Shear Stability of Polymer Containing Fluids Using a European Diesel Injector Apparatus ) Means the permanent shear stability index of the polymer, calculated based on the data measured by.
  • the NOACK evaporation amount is a measured value of the evaporation amount of the lubricating oil measured according to ASTM D 5800.
  • the NOACK evaporation amount at 250 ° C. of the lubricating oil composition is preferably 15% by mass or more, more preferably 20% by mass or more, and further preferably 25% by mass or more. preferable.
  • kinematic viscosity 2.0 ⁇ 4.5 mm 2 / s at 100 ° C.,% C P is 85 or more, NOACK evaporation loss at 250 ° C. is 15 wt% or more
  • a wax isomerized base oil is preferred.
  • the kinematic viscosity at 40 ° C. and the kinematic viscosity at 100 ° C. can be sufficiently lowered from the beginning to the long term, and the viscosity decreases after shearing. It is possible to provide a lubricating oil composition excellent in durability and fuel economy that can sufficiently suppress the above.
  • ⁇ Lubricant base oil> As a base oil, kinematic viscosity of 1.0 ⁇ 10mm 2 / s at 100 ° C.,% C P is 70 or more, NOACK evaporation loss at 250 ° C.
  • a lubricating base oil (hereinafter referred to as “the lubricating base oil according to the first embodiment”) of less than 15% by mass is used.
  • kinematic viscosity of 1.0 ⁇ 10 mm 2 / s at 100 ° C.,% C P is 70 or more, NOACK evaporation loss at 250 ° C.
  • a lubricant base oil of 15% by mass or more (hereinafter sometimes referred to as “the lubricant base oil according to the second embodiment”) is used.
  • a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and / or vacuum distillation is subjected to solvent removal, solvent extraction, and hydrocracking.
  • Paraffinic mineral oil purified by one or a combination of two or more selected from purification processes such as solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment, and normal paraffinic base oil and isoparaffinic base
  • the kinematic viscosity at 100 ° C. is 1 to 10 mm 2 / s
  • the NOACK evaporation at 250 ° C. is less than 15% by mass in the first embodiment. In the second embodiment, 15% by mass or more is exemplified.
  • the following base oils (1) to (8) are used as raw materials, and the raw oil and / or the lubricating oil recovered from the raw oil is used.
  • recovering lubricating oil fractions can be mentioned.
  • Distilled oil by atmospheric distillation of paraffinic crude oil and / or mixed base crude oil (2) Distilled oil by vacuum distillation of atmospheric distillation residue of paraffinic crude oil and / or mixed base crude oil ( WVGO) (3) Wax (slack wax, etc.) obtained by the lubricant dewaxing process and / or synthetic wax (Fischer-Tropsch wax, GTL wax, etc.) obtained by the gas-to-liquid (GTL) process, etc.
  • the above-mentioned predetermined purification methods include hydrorefining such as hydrocracking and hydrofinishing; solvent refining such as furfural solvent extraction; dewaxing such as solvent dewaxing and catalytic dewaxing; acid clay and activated clay White clay refining; chemical (acid or alkali) cleaning such as sulfuric acid cleaning and caustic soda cleaning are preferred.
  • one of these purification methods may be performed alone, or two or more may be combined.
  • the order in particular is not restrict
  • the base oil selected from the above base oils (1) to (8) or the lubricating oil fraction recovered from the base oil is subjected to a predetermined treatment.
  • the following base oil (9) or (10) obtained by carrying out is particularly preferred.
  • the base oil selected from the above base oils (1) to (8) or the lubricating oil fraction recovered from the base oil is hydrocracked and recovered from the product or the product by distillation or the like.
  • Hydrocracking base oil (10) obtained by subjecting the lubricating oil fraction to dewaxing treatment such as solvent dewaxing or catalytic dewaxing, or distillation after the dewaxing treatment, and the above base oils (1) to (The base oil selected from 8) or the lubricating oil fraction recovered from the base oil is hydroisomerized, and the product or the lubricating oil fraction recovered from the product by distillation or the like is subjected to solvent dewaxing or catalytic desorption. Hydroisomerized base oil obtained by performing dewaxing treatment such as wax or by distillation after the dewaxing treatment. Contact dewaxing is preferred as the dewaxing step.
  • dewaxing treatment such as solvent dewaxing or catalytic dewaxing, or distillation after the dewaxing treatment
  • Hydroisomerized base oil obtained by performing dewaxing treatment such as wax or by distillation after the dewaxing treatment. Contact dewax
  • a solvent refining treatment and / or a hydrofinishing treatment step may be further performed at an appropriate stage, if necessary.
  • the catalyst used for the hydrocracking / hydroisomerization is not particularly limited, but a composite oxide having cracking activity (for example, silica alumina, alumina boria, silica zirconia, etc.) or one kind of the composite oxide.
  • Hydrogenolysis with a combination of the above combined with a binder and supporting a metal having hydrogenation ability for example, one or more metals such as Group VIa metal or Group VIII metal in the periodic table
  • a hydroisomerization catalyst in which a catalyst or a support containing zeolite (eg, ZSM-5, zeolite beta, SAPO-11, etc.) is loaded with a metal having a hydrogenation ability containing at least one of the Group VIII metals are preferably used.
  • the hydrocracking catalyst and the hydroisomerization catalyst may be used in combination by stacking or mixing.
  • the reaction conditions in the hydrocracking and hydroisomerization are not particularly limited, but the hydrogen partial pressure is 0.1 to 20 MPa, the average reaction temperature is 150 to 450 ° C., the LHSV is 0.1 to 3.0 hr ⁇ 1 , the hydrogen / oil ratio. 50 to 20000 scf / b is preferable.
  • the kinematic viscosity at 100 ° C. of the lubricating base oil according to the first and second embodiments is 1.0 to 10 mm 2 / s. Also, preferably not more than 5 mm 2 / s, more preferably 4.5 mm 2 / s or less, more preferably 4.4 mm 2 / s or less, particularly preferably not more than 4.3 mm 2 / s.
  • the kinematic viscosity at 100 ° C. is preferably 3.5 mm 2 / s or more, more preferably 3.7 mm 2 / s or more, still more preferably 3.9 mm 2 / s or more, and particularly preferably 4. 0 mm 2 / s or more.
  • the kinematic viscosity at 100 ° C. of the lubricating base oil exceeds 10 mm 2 / s, the low-temperature viscosity characteristic of the lubricating oil composition is deteriorated and also there may not be obtained sufficient fuel savings, 1 mm 2 / If it is less than s, formation of an oil film at the lubrication site is insufficient, resulting in poor lubricity, and evaporation loss of the lubricating oil composition may be increased.
  • the kinematic viscosity at 40 ° C. of the lubricating base oil according to the first and second embodiments is preferably 40 mm 2 / s or less, more preferably 30 mm 2 / s or less, even more preferably 25 mm 2 / s or less, particularly preferably. Is 22 mm 2 / s or less, most preferably 20 mm 2 / s or less.
  • the kinematic viscosity at 40 ° C. of the lubricating base oil exceeds 40 mm 2 / s, the low-temperature viscosity characteristics of the lubricating oil composition may be deteriorated, and sufficient fuel economy may not be obtained. If it is less than 2 / s, the oil film formation at the lubrication site is insufficient, so that the lubricity is inferior, and the evaporation loss of the lubricating oil composition may increase.
  • the viscosity index of the lubricating base oil according to the first and second embodiments is preferably 100 or more. In the first embodiment, it is more preferably 110 or more, further preferably 120 or more, particularly preferably 125 or more, and most preferably 130 or more. In the second embodiment, it is more preferably 110 or more, further preferably 115 or more, particularly preferably 120 or more, and most preferably 122 or more.
  • the viscosity index is less than 100, not only the viscosity-temperature characteristics, thermal / oxidative stability and volatilization prevention properties of the lubricating oil composition deteriorate, but also the friction coefficient tends to increase, and the wear prevention property It tends to decrease.
  • the viscosity index means a viscosity index measured according to JIS K 2283-1993.
  • the density ( ⁇ 15 ) at 15 ° C. of the lubricating base oil according to the first and second embodiments is preferably 0.860 or less, more preferably 0.850 or less, still more preferably 0.840 or less, particularly preferably. Is 0.835 or less.
  • the density at 15 ° C. means the density measured at 15 ° C. according to JIS K 2249-1995.
  • the pour point of the lubricating base oil according to the first and second embodiments is preferably ⁇ 10 ° C. or lower, more preferably ⁇ 12.5 ° C. or lower, still more preferably ⁇ 15 ° C. or lower, and particularly preferably ⁇ 17 ° C. It is as follows. When the pour point exceeds the above upper limit, the low temperature fluidity of the entire lubricating oil composition tends to be lowered. In this application, the pour point means a pour point measured according to JIS K 2269-1987.
  • the content of sulfur in the lubricating base oil according to the first and second embodiments depends on the content of sulfur in the raw material.
  • a raw material that does not substantially contain sulfur such as a synthetic wax component obtained by a Fischer-Tropsch reaction or the like
  • a lubricating base oil that does not substantially contain sulfur can be obtained.
  • the sulfur content in the obtained lubricating base oil is usually 100 mass ppm. That's it.
  • the content of sulfur is preferably 100 mass ppm or less from the viewpoint of further improvement in thermal and oxidation stability and low sulfurization, More preferably, it is 50 mass ppm or less, More preferably, it is 10 mass ppm or less, Especially preferably, it is 5 mass ppm or less.
  • the content of nitrogen in the lubricating base oil according to the first and second embodiments is preferably 7 ppm by mass or less, more preferably 5 ppm by mass or less, and even more preferably 3 ppm by mass or less. If the nitrogen content exceeds 7 ppm by mass, the thermal and oxidation stability tends to decrease.
  • the nitrogen content means a nitrogen content measured according to JIS K 2609-1990.
  • % C P of the lubricating base oil of the first and second embodiments are 70 or more, preferably 80 or more, more preferably 85 or more, in the second embodiment further preferably 87 or more, particularly preferably 90 or more. Moreover, it is 99 or less normally, Preferably it is 95 or less, More preferably, it is 94 or less.
  • % C P of lubricating base oil is less than the above lower limit value, viscosity-temperature characteristics, thermal / oxidative stability and friction characteristics tend to decrease, and when additives are added to lubricating base oil In addition, the effectiveness of the additive tends to decrease. Further, when the% C p value of the lubricating base oil exceeds the upper limit value, the additive solubility will tend to be lower.
  • The% C A of the lubricating base oil of the first and second embodiment preferably 2 or less, more preferably 1 or less, more preferably 0.8 or less, particularly preferably 0.5 or less is there.
  • % C A of the lubricating base oil exceeds the upper limit value, the viscosity - temperature characteristic, thermal and oxidation stability and fuel efficiency tends to decrease.
  • % C N of the lubricating base oil according to the first and second embodiments are 30 or less, preferably from 4 to 25, in the second embodiment and more preferably is 5-13 . If the% C N value of the lubricating base oil exceeds the upper limit value, the viscosity - temperature characteristic, thermal and oxidation stability and frictional properties will tend to be reduced. Moreover, when% CN is less than the said lower limit, it exists in the tendency for the solubility of an additive to fall.
  • % C P ,% C N and% C A are the percentages of the number of paraffin carbons to the total number of carbons determined by the method (ndM ring analysis) based on ASTM D 3238-85, respectively. It means the percentage of the total number of naphthene carbons and the percentage of the total number of aromatic carbons.
  • the preferred ranges of% C P ,% C N and% C A described above are based on the values obtained by the above method. For example, even for a lubricating base oil containing no naphthene, it can be obtained by the above method.
  • The% CN that is obtained can exhibit values greater than zero.
  • the saturated content in the lubricating base oil according to the first and second embodiments is preferably 90% by mass or more, preferably 95% by mass or more, more preferably, based on the total amount of the lubricating base oil.
  • the ratio of the cyclic saturated component in the saturated component is preferably 40% by mass or less, preferably 35% by mass or less, preferably 30% by mass or less, and more preferably 99% by mass or more. Is 25% by mass or less, more preferably 21% by mass or less.
  • annular saturated part which occupies for the said saturated part becomes like this. Preferably it is 5 mass% or more, More preferably, it is 10 mass% or more.
  • the viscosity-temperature characteristics and thermal / oxidative stability can be improved.
  • the function of the additive can be expressed at a higher level while the additive is sufficiently stably dissolved and held in the lubricating base oil. Furthermore, it is possible to improve the friction characteristics of the lubricating base oil itself, and as a result, it is possible to achieve an improvement in friction reduction effect and an improvement in energy saving.
  • the saturated content means a value measured according to ASTM D 2007-93.
  • a similar method that can obtain the same result can be used for the separation method of the saturated component or the composition analysis of the cyclic saturated component and the non-cyclic saturated component.
  • a similar method that can obtain the same result can be used for the separation method of the saturated component or the composition analysis of the cyclic saturated component and the non-cyclic saturated component.
  • ASTM D 2007-93 the method described in ASTM D 2425-93, the method described in ASTM D 2549-91, the method by high performance liquid chromatography (HPLC), or these methods may be used.
  • HPLC high performance liquid chromatography
  • the aromatic content in the lubricating base oil according to the first and second embodiments is preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably 3% by mass based on the total amount of the lubricating base oil.
  • it is particularly preferably 2% by mass or less, preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 1% by mass or more, and particularly preferably 1.5% by mass or more. It is. If the aromatic content exceeds the above upper limit, the viscosity-temperature characteristics, thermal / oxidative stability, friction characteristics, volatilization prevention characteristics and low-temperature viscosity characteristics tend to decrease.
  • the lubricating base oil according to the first and second embodiments may not contain an aromatic component, but by making the content of the aromatic component more than the above lower limit value, Solubility can be further increased.
  • the aromatic content means a value measured according to ASTM D 2007-93.
  • the aromatic component usually includes alkylbenzene, alkylnaphthalene, anthracene, phenanthrene and alkylated products thereof, and compounds having four or more condensed benzene rings, pyridines, quinolines, phenols, naphthols, etc. An aromatic compound having a hetero atom is included.
  • a synthetic base oil may be used as the lubricating base oil according to the first and second embodiments.
  • the synthetic base oil the kinematic viscosity at 100 ° C. is 1 to 10 mm 2 / s, and the NOACK evaporation amount at 250 ° C. is less than 15% by mass in the first embodiment.
  • poly ⁇ -olefin is preferable.
  • the poly ⁇ -olefin is typically an ⁇ -olefin oligomer or co-oligomer having 2 to 32 carbon atoms, preferably 6 to 16 carbon atoms (1-octene oligomer, decene oligomer, ethylene-propylene co-oligomer, etc.). And their hydrogenation products.
  • the production method of poly ⁇ -olefin is not particularly limited.
  • Friedel-Crafts catalyst containing a complex of aluminum trichloride or boron trifluoride with water, alcohol (ethanol, propanol, butanol, etc.), carboxylic acid or ester is not particularly limited.
  • a method of polymerizing ⁇ -olefin in the presence of a polymerization catalyst such as
  • the lubricating base oil according to the second embodiment is preferably a wax isomerized base oil among the various base oils exemplified above.
  • Wax isomerized base oil broadly means those obtained by isomerizing wax such as petroleum wax, and any wax isomerized base oil can be used in the present invention as long as the following properties are satisfied.
  • the wax isomerized base oil may be a mixture of two or more kinds of wax isomerized base oils. In the case of a mixture, the mixture only needs to satisfy the following properties.
  • Kinematic viscosity at 100 ° C. of the wax isomerized base oil is preferably 2.0 mm 2 / s or higher, more preferably at least 2.3 mm 2 / s, still more preferably at least 2.5 mm 2 / s.
  • the kinematic viscosity at 100 ° C. is 2.0 mm 2 / s or more, sufficient lubricity can be secured and evaporation loss of the lubricating base oil can be suppressed.
  • the kinematic viscosity at 100 ° C. preferably not more than 4.5 mm 2 / s, more preferably less 4.2 mm 2 / s, more preferably not more than 4.0 mm 2 / s.
  • a lubricating oil composition having excellent low-temperature viscosity characteristics can be obtained.
  • the wax isomerized base oil one or more selected from light base oils having a kinematic viscosity at 100 ° C. of 2.0 mm 2 / s or more and less than 3.3 mm 2 / s and a viscosity index of 110 or more, and 100 ° C.
  • a combination with at least one selected from medium viscosity base oils having a kinematic viscosity of 3.3 mm 2 / s or more and less than 4.5 mm 2 / s and a viscosity index of 125 or more is preferable.
  • each of the light base oil and the medium viscosity base oil may be a single base oil or a mixture with another base oil.
  • the viscosity index of the wax isomerized base oil is preferably 110 or more, more preferably 120 or more, and further preferably 130 or more.
  • the viscosity index is 110 or more, it is possible to obtain a composition exhibiting good viscosity characteristics from a low temperature to a high temperature.
  • the upper limit is not particularly limited, but is usually 200 or less, and preferably 160 or less. If the viscosity index is too high, the viscosity at low temperatures tends to increase.
  • the pour point of the wax isomerized base oil is preferably ⁇ 10 ° C. or lower, more preferably ⁇ 12.5 ° C. or lower, still more preferably ⁇ 15 ° C. or lower, and particularly preferably ⁇ 20.0 ° C. or lower.
  • the lower limit is not particularly limited, but if it is too low, it is preferably ⁇ 50 ° C. or more, more preferably ⁇ 45 ° C. or more, from the viewpoint of lowering the viscosity index and economy in the dewaxing process. More preferably, it is ⁇ 40 ° C. or higher, and most preferably ⁇ 37.5 ° C. or higher.
  • the pour point of the wax isomerized base oil is ⁇ 10 ° C. or less, a lubricating oil composition having excellent low-temperature viscosity characteristics can be obtained. If the pour point is lower than ⁇ 50 ° C., a sufficient viscosity index cannot be obtained.
  • % C P of the wax isomerized base oil heat and oxidation stability and viscosity-temperature characteristics in that it can be increased, preferably 80 or more, more preferably 85 or more, particularly preferably 90 or more It is.
  • the% C N of the wax isomerized base oil is 20 or less, more preferably 15 or less, more preferably 12 or less. Further, it is preferably 2 or more, more preferably 3 or more, further preferably 5 or more, and particularly preferably 7 or more in that the metal fatigue life can be further increased.
  • the% C A of the wax isomerized base oil is 1 or less, more preferably 0.5 or less, more preferably 0.1 or less, and most preferably 0. % C A thermal-oxidative stability decreases exceeds 1.
  • the wax selected from the following (i) to (iii) is hydroisomerized and produced:
  • dewaxing treatment such as solvent dewaxing or catalytic dewaxing
  • the hydroisomerized mineral oil obtained is mentioned.
  • the dewaxing step in the production of the wax isomerized base oil either solvent dewaxing or catalytic dewaxing may be applied.
  • the catalytic dewaxing step is particularly preferable because the low temperature viscosity characteristics can be further improved.
  • Wax such as slack wax obtained by the lubricant dewaxing process and / or synthetic wax (Fischer-Tropsch wax, GTL wax, etc.) obtained by the gas-liquid (GTL) process or the like.
  • Mild hydrocracking treatment oil of one or more mixed waxes selected from the above i)
  • iii Two or more mixed oils selected from the above (i) and (ii)
  • the NOACK evaporation amount at 250 ° C. of the lubricating base oil according to the second embodiment is 15% by mass or more, preferably 20% by mass or more, and more preferably 25% or more.
  • the upper limit value of the NOACK evaporation amount at 250 ° C. of the lubricating base oil according to the second embodiment is not particularly limited, but is typically 50% by mass or less, preferably 40% by mass or less. .
  • Lubricant base oil according to the first embodiment is a kinematic viscosity of 1.0 ⁇ 10mm 2 / s at 100 ° C. as a whole base oil,% C P is not less than 70, and NOACK evaporation loss at 250 ° C. as long but less than 15% by mass, a kinematic viscosity of 1 ⁇ 10mm 2 / s at 100 ° C.,% C P is not less than 70, NOACK evaporation amount in and 250 ° C. in the one than 15 wt% base oil component alone may be used; a 100 kinematic viscosity at ° C.
  • NOACK evaporation amount in and 250 ° C. is less than 15 wt% 2 may be a mixture of species more base oils; also a kinematic viscosity of 1 ⁇ 10mm 2 / s at 100 ° C.,% C P is not less than 70, NOACK evaporation amount in and 250 ° C. is 15 quality And one or more base oil is less than percent, NOACK evaporation amount is 15 mass% or more kinematic viscosity at or 250 ° C. or% C P not 1 ⁇ 10 mm 2 / s is less than 70 at 100 ° C. It may be a mixture with one or more base oils.
  • 100 kinematic viscosity at ° C. is 1.0 ⁇ 10mm 2 / s,% C P is not less than 70, and other base oils NOACK evaporation is combined with the base oil is less than 15 wt% at 250 ° C.
  • the (NOACK evaporation amount in or 250 ° C. or% C P kinematic viscosity is not 1.0 ⁇ 10mm 2 / s is less than 70 at 100 ° C. is base oil 15% by mass or more) is not particularly limited
  • examples of the mineral base oil include solvent refined mineral oil, hydrocracked mineral oil, hydrorefined mineral oil, solvent dewaxed base oil having a kinematic viscosity at 100 ° C.
  • the synthetic base oil examples include the above-described synthetic base oils having a kinematic viscosity at 100 ° C. outside the range of 1.0 to 10 mm 2 / s.
  • the NOACK evaporation loss of kinematic viscosity of 1.0 a ⁇ 10 mm 2 / s and% C P is 70 or more and 250 ° C. at 100 ° C. as a whole base oil as long as it is 15 mass% or more, a kinematic viscosity of 1.0 ⁇ 10mm 2 / s at 100 ° C. and% C P is NOACK evaporation amount in it and 250 ° C.
  • 70 or more in the one at least 15 wt% may be used a base oil component alone, NOACK evaporation amount is 15 mass% or more at and% C P is the kinematic viscosity of 1.0 ⁇ 10mm 2 / s is 70 or more and 250 ° C. at 100 ° C. may be a mixture of two or more base oils, also and% C P is the kinematic viscosity at 100 ° C. is 1.0 ⁇ 10 mm 2 / s is not less than 70 and NOACK evaporation at 250 ° C. And one or more base oil amount is 15 mass% or more, NOACK evaporation amount in or 250 ° C. or% C P kinematic viscosity is not 1.0 ⁇ 10mm 2 / s is less than 70 at 100 ° C. It may be a mixture with one or more base oils of less than 15% by weight.
  • 100 kinematic viscosity at ° C. is 1.0 ⁇ 10mm 2 / s and% C P is 70 or more at and and 250 ° C.
  • Other base oils NOACK evaporation is combined with the base oil is at least 15 mass% in the (the base oil NOACK evaporation loss is less than 15 wt% in either or 250 ° C. or% C
  • P kinematic viscosity is not 1.0 ⁇ 10mm 2 / s is less than 70) at 100 ° C.
  • the mineral oil base oil include solvent refined mineral oil, hydrocracked mineral oil, hydrorefined mineral oil, solvent dewaxed base oil having a kinematic viscosity at 100 ° C.
  • the synthetic base oil examples include the above-described synthetic base oils whose kinematic viscosity at 100 ° C. is outside the range of 1.0 to 10 mm 2 / s.
  • the NOACK evaporation amount in and% C P is the kinematic viscosity of 1.0 ⁇ 10 mm 2 / s is 70 or more and 250 ° C. at 100 ° C. 15 wt % or more in a base oil and a base oil NOACK evaporation loss is less than 15 wt% in either or 250 ° C. or% C P kinematic viscosity is not 1.0 ⁇ 10mm 2 / s is less than 70 at 100 ° C. If a mixed base oil of, NOACK evaporation amount of the mixed base kinematic viscosity at 100 ° C.
  • the proportion of the base oil that is at least mass% is preferably at least 30 mass%, more preferably at least 50 mass%, and even more preferably at least 70 mass%.
  • the content of the lubricating base oil according to the second embodiment is usually 75% by mass or more, preferably 85% by mass or more, and usually 95% by mass or less based on the total amount of the lubricating oil composition.
  • the lubricating oil composition according to the first embodiment of the present invention is (A) kinematic viscosity thickening effect A at 100 ° C. represented by the following formula (1) and 150 ° C. represented by the following formula (2).
  • the ratio A / B with the HTHS viscosity thickening effect B is less than 2.4
  • the lubricating oil composition according to the first embodiment of the present invention can improve fuel efficiency by containing the viscosity index improver according to the first embodiment.
  • the lubricating oil composition according to the second embodiment of the present invention has (A) kinematic viscosity thickening effect A at 100 ° C. represented by the following formula (1) and 150 ° C. represented by the following formula (2).
  • the ratio A / B with the HTHS viscosity thickening effect B is less than 2.4, and the kinematic viscosity thickening effect C at 150 ° C. represented by the following formula (3) and the following formula (2):
  • Polymethacrylate viscosity index improver having a ratio C / B of HTHS viscosity increase effect B at 150 ° C. of less than 1.4, PSSI of 5 or less, and molecular weight of 10,000 to 400,000 (Hereinafter referred to as “viscosity index improver according to the second embodiment” for convenience) 0.1 to 30% by mass.
  • the lubricating oil composition according to the second embodiment of the present invention can improve fuel efficiency by containing the viscosity index improver according to the second embodiment.
  • the structure of the viscosity index improver compound according to the first and second embodiments is not particularly limited.
  • Specific examples of the compound include non-dispersed or dispersed poly (meth) acrylate viscosity index improvers, (meth) acrylate-olefin copolymers, and mixtures thereof.
  • A XX 0 (1)
  • A represents a thickening effect of kinematic viscosity at 100 ° C.
  • X represents a hydrocracking base oil YUBASE (registered trademark) 4 manufactured by SK Lubricants
  • the viscosity index improver 6 kinematic viscosity at 100 ° C.
  • B Y ⁇ Y 0 (2)
  • B represents the effect of increasing the HTHS viscosity at 150 ° C.
  • Y represents the HTHS viscosity at 150 ° C. (unit: mPa ⁇ s) of the mixture comprising the reference base oil and the viscosity index improver 6% by mass. s)
  • Y 0 represents the HTHS viscosity (unit: mPa ⁇ s) of the reference base oil at 150 ° C.
  • C Z ⁇ Z 0 (3)
  • C represents a thickening effect of kinematic viscosity at 150 ° C.
  • Z represents a kinematic viscosity at 150 ° C. (unit: mm 2 ) of a mixture composed of the reference base oil and the viscosity index improver 6% by mass / 0 )
  • Z 0 represents the kinematic viscosity (unit: mm 2 / s) of the reference base oil at 150 ° C. ]
  • SK Base Lubricants hydrocracked base oil YUBASE (registered trademark) 4 which is a reference base oil used for measuring the thickening effect, is a commercially available mineral oil system. It is a base oil and its properties are as shown in Table 1 below.
  • the thickening effects A, B, and C of the viscosity index improver are the kinematic viscosities X 0 , X, and 150 ° C. at 100 ° C. before and after adding 6 mass% of the viscosity index improver to the reference base oil.
  • the HTHS viscosity Y 0 , Y, and kinematic viscosity Z 0 , Z at 150 ° C. can be measured, respectively, and the difference XX 0 , YY 0 , and ZZ 0 can be calculated.
  • the ratio A / B of the thickening effect of the viscosity index improver needs to be less than 2.4 as described above, preferably 2.3 or less, and more preferably 2.1 or less.
  • the lower limit of the ratio A / B is not particularly limited, but is preferably 1.3 or more, more preferably 1.5 or more.
  • the ratio C / B of the thickening effect of the viscosity index improver needs to be less than 1.4, preferably 1.3 or less, and more preferably 1.25 or less.
  • the lower limit of the ratio C / B is not particularly limited, but is preferably 0.4 or more, more preferably 0.6 or more.
  • the viscosity index improver according to the first and second embodiments is a poly (%) in which the proportion of the structural unit represented by the following general formula (1) in the total monomer units in the polymer is 10 to 90 mol%. It is preferable to contain a (meth) acrylate viscosity index improver.
  • R 1 represents hydrogen or a methyl group
  • R 2 represents a linear or branched hydrocarbon group having 1 to 6 carbon atoms.
  • the proportion of the (meth) acrylate structural unit represented by the general formula (1) in the polymer is preferably 10 to 90 mol%, more preferably Is 80 mol% or less, more preferably 70 mol% or less. More preferably, it is 20 mol% or more, More preferably, it is 30 mol% or more, Especially preferably, it is 40 mol% or more.
  • the viscosity index improver according to the first and second embodiments is a copolymer having another (meth) acrylate structural unit in addition to the (meth) acrylate structural unit represented by the general formula (1). May be.
  • Such a copolymer includes one or more monomers represented by the following general formula (2) (hereinafter referred to as “monomer (M-1)”) and other than the monomer (M-1). It can be obtained by copolymerizing with a monomer.
  • R 3 represents a hydrogen atom or a methyl group
  • R 4 represents a linear or branched hydrocarbon group having 1 to 6 carbon atoms.
  • the monomer to be combined with the monomer (M-1) is arbitrary, but for example, a monomer represented by the following general formula (3) (hereinafter referred to as “monomer (M-2)”) is preferable.
  • the copolymer of the monomer (M-1) and the monomer (M-2) is a so-called non-dispersed poly (meth) acrylate viscosity index improver.
  • R 5 represents a hydrogen atom or a methyl group
  • R 6 represents a linear or branched hydrocarbon group having 7 or more carbon atoms.
  • R 6 in the monomer (M-2) represented by the formula (3) is a linear or branched hydrocarbon group having 7 or more carbon atoms as described above, and preferably a linear chain having 10 or more carbon atoms. Or it is a branched hydrocarbon, More preferably, it is a linear or branched hydrocarbon with 15 or more carbon atoms, More preferably, it is a branched hydrocarbon group with 18 or more carbon atoms. Moreover, the upper limit of the carbon number of the hydrocarbon group represented by R 6 is not particularly limited, but is preferably a linear or branched hydrocarbon group having a carbon number of 50,000 or less.
  • it is a linear or branched hydrocarbon group of 500 or less, more preferably a linear or branched hydrocarbon group of 100 or less, particularly preferably 50 or less.
  • a hydrocarbon group most preferably a branched hydrocarbon group of 25 or less.
  • a comb-shaped poly (meth) acrylate can be exemplified.
  • the comb-shaped poly (meth) acrylate here is a copolymer of the monomer (M-1) and the monomer (M-2), and the monomer (M-2) is R 6 in the formula (3).
  • Mn number average molecular weight
  • a macromonomer for example, a macromonomer derived from a hydride of polyolefin obtained by copolymerizing butadiene and isoprene can be employed.
  • the viscosity index improver there is only one (meth) acrylate structural unit corresponding to the monomer (M-2) represented by the general formula (3) in the polymer. It may be a combination of two or more.
  • the proportion of the structural unit corresponding to the monomer (M-2) represented by the general formula (3) in the total monomer units in the polymer is preferably 0.5 to 70 mol%, more preferably It is 60 mol% or less, more preferably 50 mol% or less, particularly preferably 40 mol% or less, and most preferably 30 mol% or less.
  • the proportion of the structural unit corresponding to the monomer (M-2) represented by the general formula (3) in the total monomer units in the polymer exceeds 70 mol%, the effect of improving the viscosity temperature characteristics and the low temperature viscosity characteristics If the amount is less than 0.5 mol%, the effect of improving the viscosity temperature characteristic may be inferior.
  • monomers to be combined with the monomer (M-1) include a monomer represented by the following general formula (4) (hereinafter referred to as “monomer (M-3)”) and a general formula (5)
  • One or more selected from monomers (hereinafter referred to as “monomer (M-4)”) are preferred.
  • the copolymer of the monomer (M-1) and the monomer (M-3) and / or (M-4) is a so-called dispersion type poly (meth) acrylate viscosity index improver.
  • the dispersion type poly (meth) acrylate viscosity index improver may further contain a monomer (M-2) as a constituent monomer.
  • R 7 represents a hydrogen atom or a methyl group
  • R 8 represents an alkylene group having 1 to 18 carbon atoms
  • E 1 represents 1 to 2 nitrogen atoms and 0 to 0 oxygen atoms
  • 2 represents an amine residue or heterocyclic residue
  • a represents 0 or 1.
  • alkylene group having 1 to 18 carbon atoms represented by R 8 include ethylene group, propylene group, butylene group, pentylene group, hexylene group, heptylene group, octylene group, nonylene group, decylene group, Examples include an undecylene group, a dodecylene group, a tridecylene group, a tetradecylene group, a pentadecylene group, a hexadecylene group, a heptadecylene group, and an octadecylene group (these alkylene groups may be linear or branched).
  • Specific examples of the group represented by E 1 include a dimethylamino group, a diethylamino group, a dipropylamino group, a dibutylamino group, an anilino group, a toluidino group, a xylidino group, an acetylamino group, a benzoylamino group, and a morpholino group.
  • R 9 represents a hydrogen atom or a hydrocarbon group
  • E 2 represents an amine residue or a complex containing 1 to 2 hydrocarbon groups or nitrogen atoms and 0 to 2 oxygen atoms. A ring residue is indicated.
  • Specific examples of the group represented by E 2 include a dimethylamino group, a diethylamino group, a dipropylamino group, a dibutylamino group, an anilino group, a toluidino group, a xylidino group, an acetylamino group, a benzoylamino group, and a morpholino group.
  • the monomers (M-3) and (M-4) specifically, dimethylaminomethyl methacrylate, diethylaminomethyl methacrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, 2-methyl-5-vinylpyridine, Examples thereof include morpholinomethyl methacrylate, morpholinoethyl methacrylate, N-vinylpyrrolidone, and mixtures thereof.
  • the method for producing the viscosity index improver according to the first and second embodiments is arbitrary.
  • the monomer (M-1) and / or (M ⁇ 2) and at least one selected from monomers (M-3) to (M-4) can be easily obtained by radical solution polymerization.
  • the PSSI (Permanent Shear Stability Index) in the diesel injector method of the viscosity index improver according to the first and second embodiments is 5 or less, more preferably 4 or less, still more preferably 3 or less, particularly preferably 2 Hereinafter, it is most preferably 1 or less.
  • PSSI Permanent Shear Stability Index
  • the lower limit of PSSI of the viscosity index improver according to the first and second embodiments is not particularly limited, but is usually more than zero.
  • the viscosity index improver according to the first embodiment has a weight average molecular weight (Mw) of 10,000 to 500,000, preferably 20,000 or more, more preferably 50,000 or more, Preferably it is 100,000 or more, Most preferably, it is 120,000 or more. Moreover, it is preferably 400,000 or less, more preferably 300,000 or less, and further preferably 200,000 or less.
  • the viscosity index improver according to the second embodiment has a weight average molecular weight (Mw) of 10,000 to 400,000, preferably 20,000 or more, more preferably 50,000 or more, Preferably it is 100,000 or more, Most preferably, it is 120,000 or more.
  • the weight average molecular weight is less than the above lower limit, not only the viscosity index improving effect when dissolved in the lubricating base oil is small, but the fuel economy and low temperature viscosity characteristics are inferior, and the cost may increase.
  • the weight average molecular weight exceeds the above upper limit, the effect of increasing the viscosity becomes too large, and not only the fuel saving property and the low temperature viscosity property are inferior, but also shear stability, solubility in lubricating base oil, storage Stability deteriorates.
  • the ratio of the weight average molecular weight and the PSSI (Mw / PSSI) of the viscosity index improvers according to the first and second embodiments is preferably 1.0 ⁇ 10 4 or more, more preferably 2.0 ⁇ 10 6. 4 or more, more preferably 5.0 ⁇ 10 4 or more, and particularly preferably 8.0 ⁇ 10 4 or more.
  • Mw / PSSI is less than 1.0 ⁇ 10 4 , fuel economy and low temperature startability, that is, viscosity temperature characteristics and low temperature viscosity characteristics may be deteriorated.
  • the ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the viscosity index improver according to the first and second embodiments is preferably 4.0 or less, more preferably 3 0.5 or less, more preferably 3.0 or less, particularly preferably 2.0 or less, and most preferably 1.5 or less.
  • Mw / Mn is 1.0 or more, More preferably, it is 1.05 or more, More preferably, it is 1.1 or more.
  • the content of the viscosity index improver according to the second embodiment is 0.1 to 30% by mass based on the total amount of the composition. Preferably it is 0.5 mass% or more, More preferably, it is 1 mass% or more, More preferably, it is 2 mass% or more. Moreover, it is preferable that it is 50 mass% or less, More preferably, it is 20 mass% or less, More preferably, it is 15 mass%.
  • the content is less than 0.1% by mass, the fuel efficiency is deteriorated and the low temperature characteristics may be insufficient.
  • the content exceeds 30% by mass the fuel efficiency of the composition is decreased. May deteriorate and shear stability may deteriorate.
  • the lubricating oil composition of the present invention may be a general non-dispersion type or dispersion type poly (meth) acrylate, non-dispersion type or dispersion type.
  • An ethylene- ⁇ -olefin copolymer or a hydrogenated product thereof, polyisobutylene or a hydrogenated product thereof, a styrene-diene hydrogenated copolymer, a styrene-maleic anhydride ester copolymer, and a polyalkylstyrene may further be contained. .
  • the lubricating oil composition of the present invention contains 0.01 to 2.0% by mass of (B) a friction modifier based on the total amount of the composition. Thereby, fuel-saving performance can be improved.
  • the friction modifier is preferably at least one friction modifier selected from organic molybdenum compounds and ashless friction modifiers.
  • organic molybdenum compound examples include organic molybdenum compounds containing sulfur such as molybdenum dithiophosphate and molybdenum dithiocarbamate (MoDTC); molybdenum compounds (eg, molybdenum oxide such as molybdenum dioxide and molybdenum trioxide, orthomolybdic acid, para-molybdenum) Acids, molybdic acids such as (poly) sulfurized molybdic acid, metal salts of these molybdates, molybdates such as ammonium salts, molybdenum disulfide, molybdenum trisulfide, molybdenum pentasulfide, molybdenum sulfide such as polysulfide molybdenum, molybdenum sulfide Acid, metal salts of sulfur molybdate or amine salts, molybdenum halides such as molybdenum chloride, etc.) and sulfur-containing sulfur
  • organic molybdenum compound an organic molybdenum compound that does not contain sulfur as a constituent element can be used.
  • organic molybdenum compounds that do not contain sulfur as a constituent element include molybdenum-amine complexes, molybdenum-succinimide complexes, molybdenum salts of organic acids, and molybdenum salts of alcohols. Complexes, molybdenum salts of organic acids and molybdenum salts of alcohols are preferred.
  • the (B) friction modifier when an organic molybdenum compound is used as the (B) friction modifier, its content is 0.01 to 2.0% by mass based on the total amount of the composition.
  • the content of the organic molybdenum compound in terms of molybdenum element is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, and still more preferably 0.01% by mass or more, based on the total amount of the lubricating oil composition. In particular, it is 0.03% by mass or more, preferably 0.2% by mass or less, more preferably 0.1% by mass or less, still more preferably 0.08% by mass or less, particularly preferably 0.06%. It is below mass%.
  • a compound usually used as a friction modifier for lubricating oil can be used without any particular limitation.
  • the ashless friction modifier that can be used in the lubricating oil composition of the present invention include, for example, one having at least one heteroelement selected from an oxygen atom, a nitrogen atom, and a sulfur atom in the molecule and having 6 to 50 carbon atoms.
  • the compound of this is mentioned. More specifically, at least one alkyl group or alkenyl group having 6 to 30 carbon atoms, particularly a straight chain alkyl group, straight chain alkenyl group, branched alkyl group, or branched alkenyl group having 6 to 30 carbon atoms in the molecule.
  • ashless friction modifiers such as amine compounds, fatty acid esters, fatty acid amides, fatty acids, aliphatic alcohols, aliphatic ethers, urea compounds, hydrazide compounds, and the like.
  • the content of the ashless friction modifier in the lubricating oil composition of the present invention is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0, based on the total amount of the lubricating oil composition. .3% by mass or more, preferably 2% by mass or less, more preferably 1% by mass or less. If the content of the ashless friction modifier is less than 0.01% by mass, the effect of reducing friction due to the addition tends to be insufficient, and if it exceeds 2% by mass, the effect of an anti-wear additive or the like. Tends to be inhibited, or the solubility of the additive tends to deteriorate.
  • the friction modifier (B) is preferably an organic molybdenum friction modifier, more preferably an organic molybdenum compound containing sulfur, and even more preferably molybdenum dithiocarbamate.
  • the lubricating oil composition of the present invention can contain other additives generally used in lubricating oils depending on the purpose.
  • additives include metal detergents, ashless dispersants, antiwear agents (or extreme pressure agents), antioxidants, corrosion inhibitors, rust inhibitors, demulsifiers, metal deactivators, Examples thereof include additives such as an antifoaming agent.
  • Metal detergents include alkali metal sulfonates or alkaline earth metal sulfonates, alkali metal phenates or alkaline earth metal phenates, and normal salts, basic salts or overbased salts such as alkali metal salicylates or alkaline earth metal salicylates. Etc.
  • one or more alkali metal or alkaline earth metal detergents selected from the group consisting of these, particularly alkaline earth metal detergents can be preferably used.
  • a magnesium salt and / or a calcium salt is preferable, and a calcium salt is more preferably used.
  • an ashless dispersant used for lubricating oil can be used without any particular limitation.
  • the ashless dispersant that can be used in the present invention include mono- or bissuccinimide having at least one linear or branched alkyl group or alkenyl group having 40 to 400 carbon atoms in the molecule, and 40 to 40 carbon atoms.
  • antioxidants examples include ashless antioxidants such as phenols and amines, and metal antioxidants such as copper and molybdenum.
  • phenol-based ashless antioxidants include 4,4′-methylenebis (2,6-di-tert-butylphenol) and 4,4′-bis (2,6-di-tert-butylphenol).
  • amine-based ashless antioxidants include phenyl- ⁇ -naphthylamine, alkylphenyl- ⁇ -naphthylamine, and dialkyldiphenylamine.
  • the antiwear agent used in the lubricating oil can be used without particular limitation.
  • sulfur-based, phosphorus-based, sulfur-phosphorus extreme pressure agents and the like can be used.
  • addition of a sulfur-based extreme pressure agent is preferable, and sulfurized fats and oils are particularly preferable.
  • corrosion inhibitor examples include benzotriazole, tolyltriazole, thiadiazole, and imidazole compounds.
  • rust preventive examples include petroleum sulfonate, alkylbenzene sulfonate, dinonylnaphthalene sulfonate, alkenyl succinate, and polyhydric alcohol ester.
  • demulsifier examples include polyalkylene glycol nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, and polyoxyethylene alkyl naphthyl ether.
  • metal deactivators include imidazoline, pyrimidine derivatives, alkylthiadiazoles, mercaptobenzothiazoles, benzotriazoles or derivatives thereof, 1,3,4-thiadiazole polysulfide, 1,3,4-thiadiazolyl-2,5-bis.
  • metal deactivators include imidazoline, pyrimidine derivatives, alkylthiadiazoles, mercaptobenzothiazoles, benzotriazoles or derivatives thereof, 1,3,4-thiadiazole polysulfide, 1,3,4-thiadiazolyl-2,5-bis.
  • Examples thereof include dialkyldithiocarbamate, 2- (alkyldithio) benzimidazole, and ⁇ - (o-carboxybenzylthio) propiononitrile.
  • antifoaming agents examples include silicone oils having a kinematic viscosity at 25 ° C. of 1000 to 100,000 mm 2 / s, alkenyl succinic acid derivatives, esters of polyhydroxy aliphatic alcohols and long chain fatty acids, methyl salicylates, and , O-hydroxybenzyl alcohol and the like.
  • the content thereof is preferably 0.01 to 10% by mass based on the total amount of the lubricating oil composition.
  • the kinematic viscosity at 100 ° C. of the lubricating oil composition of the present invention is preferably 4.0 to 12 mm 2 / s, more preferably 9.0 mm 2 / s or less, still more preferably 8.0 mm 2 / s or less. Particularly preferably, it is 7.0 mm 2 / s or less, and most preferably 6.8 mm 2 / s or less. Further, it is more preferably 4.5 mm 2 / s or more, further preferably 5.0 mm 2 / s or more, particularly preferably 5.5 mm 2 / s or more, and most preferably 6.0 mm 2 / s or more.
  • the kinematic viscosity at 100 ° C. here refers to the kinematic viscosity at 100 ° C. as defined in ASTM D-445. If the kinematic viscosity at 100 ° C. of the lubricating oil composition is less than 4.0 mm 2 / s, there is a risk of insufficient lubricity. If it exceeds 12 mm 2 / s, the necessary low temperature viscosity and sufficient fuel saving Performance may not be obtained.
  • the kinematic viscosity at 40 ° C. of the lubricating oil composition of the present invention is preferably 4.0 to 50 mm 2 / s, more preferably 40 mm 2 / s or less, still more preferably 35 mm 2 / s or less, particularly preferably. It is 32 mm 2 / s or less, and most preferably 30 mm 2 / s or less. Further, it is more preferably 15 mm 2 / s or more, further preferably 18 mm 2 / s or more, still more preferably 20 mm 2 / s or more, particularly preferably 22 mm 2 / s or more, and most preferably 25 mm 2 / s or more.
  • the kinematic viscosity at 40 ° C. here refers to the kinematic viscosity at 40 ° C. as defined in ASTM D-445.
  • the kinematic viscosity at 40 ° C. of the lubricating oil composition is less than 4 mm 2 / s, there is a risk of insufficient lubricity, and when it exceeds 50 mm 2 / s, the necessary low temperature viscosity and sufficient fuel saving performance are obtained. May not be obtained.
  • the viscosity index of the lubricating oil composition of the present invention is preferably 140 to 400, more preferably 150 or more, still more preferably 160 or more, and particularly preferably 165 or more.
  • the viscosity index of the lubricating oil composition is less than 140, it may be difficult to improve fuel economy while maintaining the HTHS viscosity at 150 ° C., and further, low temperature (for example, the viscosity grade of fuel economy oil) It may be difficult to reduce the viscosity at -35 ° C., which is the CCS viscosity measurement temperature defined in SAE viscosity grade 0W-X, which is known as Further, when the viscosity index of the lubricating oil composition exceeds 400, the evaporability may be deteriorated, and further, there may be a problem due to insufficient solubility of the additive and compatibility with the sealing material. is there.
  • the HTHS viscosity at 100 ° C. of the lubricating oil composition of the present invention is preferably 5.5 mPa ⁇ s or less, more preferably 5.0 mPa ⁇ s or less, still more preferably 4.9 mPa ⁇ s or less, particularly preferably. 4.8 mPa ⁇ s or less. Further, it is preferably 3.0 mPa ⁇ s or more, more preferably 3.5 mPa ⁇ s or more, further preferably 4.0 mPa ⁇ s or more, and particularly preferably 4.5 mPa ⁇ s or more. In the present application, the HTHS viscosity at 100 ° C.
  • the HTHS viscosity at 150 ° C. of the lubricating oil composition of the present invention is preferably 4.0 mPa ⁇ s or less, more preferably 3.0 mPa ⁇ s or less, still more preferably 2.7 mPa ⁇ s or less, particularly preferably. 2.5 mPa ⁇ s or less. Further, it is preferably 2.0 mPa ⁇ s or more, more preferably 2.1 mPa ⁇ s or more, further preferably 2.2 mPa ⁇ s or more, and particularly preferably 2.25 mPa ⁇ s or more. In the present application, the HTHS viscosity at 150 ° C.
  • HTHS viscosity at 150 ° C. means a high temperature high shear viscosity at 150 ° C. as defined in ASTM D4683. If the HTHS viscosity at 150 ° C. is less than 2.0 mPa ⁇ s, the lubricity may be insufficient, and if it exceeds 4.0 mPa ⁇ s, sufficient fuel saving performance may not be obtained.
  • the evaporation loss amount of the lubricating oil composition according to the first embodiment of the present invention is preferably 20% by mass or less, more preferably 16% by mass or less, as NOACK evaporation amount at 250 ° C., 15 It is particularly preferable that the content is not more than mass%.
  • the NOACK evaporation amount of the lubricating base oil component exceeds 20% by mass, the evaporation loss of the lubricating oil is large, which causes an increase in viscosity and the like, which is not preferable.
  • the NOACK evaporation amount is a value obtained by measuring the evaporation amount of the lubricating oil measured in accordance with ASTM D 5800.
  • the lower limit of the NOACK evaporation amount at 250 ° C. of the lubricating oil composition is not particularly limited, but is usually 5% by mass or more.
  • the NOACK evaporation amount at 250 ° C. of the lubricating oil composition according to the second embodiment of the present invention is preferably 15% by mass or more, more preferably 20% by mass or more, and 25% by mass or more. More preferably.
  • the upper limit of the NOACK evaporation amount is not particularly limited, but is typically 50% by mass or less, and preferably 40% by mass or less.
  • the kinematic viscosity at 40 ° C. and the kinematic viscosity at 100 ° C. are sufficiently lowered from the beginning to the long term while maintaining the HTHS viscosity at 150 ° C. Moreover, the viscosity drop after shearing can be sufficiently suppressed, and the durability, fuel saving property, and volatilization prevention property are excellent.
  • the kinematic viscosity at 40 ° C. and the kinematic viscosity at 100 ° C. are sufficiently lowered from the beginning to the long term while maintaining the HTHS viscosity at 150 ° C.
  • the lubricating oil composition of the present invention having such excellent characteristics can be suitably used as fuel-saving engine oils such as fuel-saving gasoline engine oil and fuel-saving diesel engine oil.
  • Examples 1 to 8 Comparative Examples 1 to 9> Using the base oils and additives shown below, the lubricating oil compositions (Examples 1 to 4) and the comparative lubricating oil compositions (Comparative Examples 1 to 5) according to the first embodiment of the present invention were respectively used. Prepared. In addition, the lubricating oil compositions according to the second embodiment of the present invention (Examples 5 to 8) and comparative lubricating oil compositions (Comparative Examples 6 to 9) were prepared, respectively. Table 2 shows the properties of the base oils O-1 to O-4.
  • a thickening effect A to C measured for a mixture obtained by adding 6.0% by mass of each viscosity index improver to YUBASE (registered trademark) 4 manufactured by SK Lubricants Co., and a ratio A / B thereof, C / B is shown in Table 3.
  • Tables 4 and 5 show the compositions and properties of the lubricating oil compositions of Examples 1 to 8 and Comparative Examples 1 to 9 (kinematic viscosity at 40 ° C. or 100 ° C., viscosity index, HTHS viscosity at 100 ° C. or 150 ° C.).
  • mass% represents mass% based on the total amount of the base oil
  • mass% represents mass% based on the total amount of the composition
  • mass ppm represents mass based on the total amount of the composition. Represents ppm.
  • Base oil Base oil
  • Base oil O-1 base oil 1
  • base oil 2 base oil 2
  • base oil 3 base oil 3
  • base oil 4 base oil 4
  • B-1 MoDTC (the alkyl group is a combination of an alkyl group having a chain length of C8 and an alkyl group having a chain length of C13, Mo content: 10% by mass, sulfur content: 11% by mass)
  • C-1 Performance additive package A (additive package containing succinimide dispersant, ZnDTP, antioxidant, antiwear agent, pour point depressant, antifoaming agent, etc.).
  • D-1 Metal-based detergent A (overbased calcium salicylate, base number 170 mgKOH / g, Ca content 6.3% by mass)
  • D-2 Metal-based detergent B (overbased calcium borate salicylate, base number 190 mgKOH / g, Ca content 6.8% by mass, B content 2.7% by mass)
  • the lubricating oil compositions of Examples 1 to 8 and Comparative Examples 1 to 9 were measured for kinematic viscosity at 40 ° C. or 100 ° C., viscosity index, and HTHS viscosity at 100 ° C. or 150 ° C. Further, engine motoring friction tests were conducted on the lubricating oil compositions of Examples 1 to 8 and Comparative Examples 1 to 2, 5, 6 to 7, and 9.
  • the measuring method is as follows. (1) Kinematic viscosity: measured according to ASTM D-445. (2) Viscosity index: measured in accordance with JIS K 2283-1993. (3) HTHS viscosity: measured in accordance with ASTM D-4683.
  • Friction torque was measured at an oil temperature of 60 to 95 ° C. and a rotation speed of 750 to 3,000 rpm using an inline 4-cylinder, 1,800 cc, roller rocker type engine.
  • Table 4 shows the average motoring friction improvement rate calculated using Comparative Example 1 as the reference oil.
  • Table 5 shows the motoring friction average improvement rate calculated using Comparative Example 5 as the reference oil.
  • the lubricating oil compositions of Examples 1 to 4 according to the first embodiment of the present invention have the same HTHS viscosity at 150 ° C., but do not contain the component (A). Compared to the engine oil compositions of 4 to 4, the kinematic viscosity was low and the fuel economy was excellent. Further, the motoring friction improvement rate of the lubricating oil composition of Comparative Example 5 containing no component (B) was remarkably inferior.
  • the lubricating oil compositions of Examples 1 to 4 according to the second embodiment of the present invention have the same HTHS viscosity at 150 ° C., but do not contain the component (A) Comparative Example 6 Compared to the engine oil compositions of 8 to 8, the kinematic viscosity was low and the fuel economy was excellent. Further, the motoring friction improvement rate of the lubricating oil composition of Comparative Example 9 containing no component (B) was remarkably inferior.
  • the lubricating oil composition of the present invention can be suitably used as a lubricating oil composition for internal combustion engines such as gasoline engines, diesel engines, and gas engines for motorcycles, automobiles, power generation, cogeneration, and the like.
  • it can be suitably used as transmission oil, ATF, CVTF, MTF, hydraulic oil, and the like, and further, lubricating oil compositions for various engines using fuel with a sulfur content of 50 mass ppm or less, for ships, It is also useful as a lubricating oil composition for various engines for outboard motors.

Landscapes

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

Abstract

La présente invention concerne une huile lubrifiante qui contient : une huile de base d'huile lubrifiante présentant une viscosité cinématique allant de 1 à 10 mm2/s à 100 °C et un % CP supérieur ou égal à 70 ; (A) de 0,1 à 30 % en masse d'un agent améliorant l'indice de viscosité à base poly(méth)acrylate ayant un rapport A/B inférieur à 2,4, A représentant l'effet épaississant de la viscosité cinématique à 100 °C et B représentant l'effet épaississant de la viscosité de cisaillement à la haute température (HTHS) à 150 °C, un rapport C/B inférieur à 1,4, C représentant l'effet épaississant de la viscosité cinématique à 150 °C et B représentant l'effet épaississant de la viscosité HTHS à 150 °C, une valeur de PSSI inférieure ou égale à 5, et une masse moléculaire moyenne en poids allant de 10 000 à 500 000 ; et (B) de 0,01 à 2,0 % en masse d'un agent d'ajustement à la friction.
PCT/JP2016/060239 2015-03-31 2016-03-29 Composition d'huile lubrifiante WO2016159006A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/561,670 US20180072962A1 (en) 2015-03-31 2016-03-29 Lubricating oil composition
JP2017510054A JPWO2016159006A1 (ja) 2015-03-31 2016-03-29 潤滑油組成物
CN201680005061.4A CN107207991A (zh) 2015-03-31 2016-03-29 润滑油组合物

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-074368 2015-03-31
JP2015074368 2015-03-31
JP2015-074362 2015-03-31
JP2015074362 2015-03-31

Publications (1)

Publication Number Publication Date
WO2016159006A1 true WO2016159006A1 (fr) 2016-10-06

Family

ID=57005872

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/060239 WO2016159006A1 (fr) 2015-03-31 2016-03-29 Composition d'huile lubrifiante

Country Status (4)

Country Link
US (1) US20180072962A1 (fr)
JP (1) JPWO2016159006A1 (fr)
CN (1) CN107207991A (fr)
WO (1) WO2016159006A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018212339A1 (fr) 2017-05-19 2018-11-22 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante pour machine à combustion interne
WO2018212340A1 (fr) 2017-05-19 2018-11-22 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante pour machine à combustion interne
WO2019031404A1 (fr) * 2017-08-10 2019-02-14 出光興産株式会社 Composition d'huile lubrifiante, moteur à combustion interne et procédé de lubrification de moteur à combustion interne
WO2020203524A1 (fr) * 2019-03-29 2020-10-08 出光興産株式会社 Composition d'huile de graissage
WO2021200045A1 (fr) * 2020-03-31 2021-10-07 出光興産株式会社 Composition d'huile lubrifiante et procédé d'utilisation d'huile lubrifiante
US11649413B2 (en) 2018-05-18 2023-05-16 Eneos Corporation Lubricating oil composition for internal combustion engine
US20230183591A1 (en) * 2021-06-25 2023-06-15 Eneos Corporation Lubricating oil composition for internal combustion engine
JP7442287B2 (ja) 2019-09-26 2024-03-04 Ｅｎｅｏｓ株式会社 内燃機関用潤滑油組成物

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11085006B2 (en) 2019-07-12 2021-08-10 Afton Chemical Corporation Lubricants for electric and hybrid vehicle applications
US20220064564A1 (en) * 2020-08-31 2022-03-03 Eneos Corporation Lubricating oil composition for internal combustion engine
US11326123B1 (en) 2020-12-01 2022-05-10 Afton Chemical Corporation Durable lubricating fluids for electric vehicles
US11634655B2 (en) 2021-03-30 2023-04-25 Afton Chemical Corporation Engine oils with improved viscometric performance
CN113174285B (zh) * 2021-04-27 2022-08-30 中国石油化工股份有限公司 发动机油组合物及其制备方法以及提高发动机的节能性和/或轴承抗磨损性能的方法
US11814599B2 (en) 2022-03-31 2023-11-14 Afton Chemical Corporation Durable magnet wires and lubricating fluids for electric and hybrid vehicle applications
US11912955B1 (en) 2022-10-28 2024-02-27 Afton Chemical Corporation Lubricating compositions for reduced low temperature valve train wear
US11939551B1 (en) 2023-06-27 2024-03-26 Afton Chemical Corporation Lubricating fluid for an electric motor system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009167277A (ja) * 2008-01-15 2009-07-30 Nippon Oil Corp 潤滑油組成物
JP2009191246A (ja) * 2008-01-15 2009-08-27 Nippon Oil Corp 潤滑油組成物
JP2009191247A (ja) * 2008-01-15 2009-08-27 Nippon Oil Corp 潤滑油組成物
JP2010280820A (ja) * 2009-06-04 2010-12-16 Jx Nippon Oil & Energy Corp 潤滑油組成物

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105255562B (zh) * 2007-12-05 2018-02-13 吉坤日矿日石能源株式会社 润滑油组合物
CN103525515A (zh) * 2009-06-04 2014-01-22 吉坤日矿日石能源株式会社 润滑油组合物及其制造方法
JP5689592B2 (ja) * 2009-09-01 2015-03-25 Ｊｘ日鉱日石エネルギー株式会社 潤滑油組成物
JP2011140572A (ja) * 2010-01-07 2011-07-21 Jx Nippon Oil & Energy Corp 潤滑油組成物
JP6059531B2 (ja) * 2012-12-28 2017-01-11 Ｊｘエネルギー株式会社 潤滑油組成物
BR112015028641A2 (pt) * 2013-05-14 2017-07-25 Lubrizol Corp composição e método de lubrificação de uma transmissão de lubrificação

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009167277A (ja) * 2008-01-15 2009-07-30 Nippon Oil Corp 潤滑油組成物
JP2009191246A (ja) * 2008-01-15 2009-08-27 Nippon Oil Corp 潤滑油組成物
JP2009191247A (ja) * 2008-01-15 2009-08-27 Nippon Oil Corp 潤滑油組成物
JP2010280820A (ja) * 2009-06-04 2010-12-16 Jx Nippon Oil & Energy Corp 潤滑油組成物

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11168281B2 (en) 2017-05-19 2021-11-09 Eneos Corporation Lubricating oil composition for internal combustion engine
WO2018212340A1 (fr) 2017-05-19 2018-11-22 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante pour machine à combustion interne
WO2018212339A1 (fr) 2017-05-19 2018-11-22 Ｊｘｔｇエネルギー株式会社 Composition d'huile lubrifiante pour machine à combustion interne
CN110662825A (zh) * 2017-05-19 2020-01-07 Jxtg能源株式会社 内燃机用润滑油组合物
US11680221B2 (en) 2017-05-19 2023-06-20 Eneos Corporation Lubricating oil composition for internal combustion engine
JPWO2018212339A1 (ja) * 2017-05-19 2020-03-19 Ｊｘｔｇエネルギー株式会社 内燃機関用潤滑油組成物
JPWO2018212340A1 (ja) * 2017-05-19 2020-03-26 Ｊｘｔｇエネルギー株式会社 内燃機関用潤滑油組成物
JP7198748B2 (ja) 2017-05-19 2023-01-04 Ｅｎｅｏｓ株式会社 内燃機関用潤滑油組成物
JP7093343B2 (ja) 2017-05-19 2022-06-29 Ｅｎｅｏｓ株式会社 内燃機関用潤滑油組成物
WO2019031404A1 (fr) * 2017-08-10 2019-02-14 出光興産株式会社 Composition d'huile lubrifiante, moteur à combustion interne et procédé de lubrification de moteur à combustion interne
JP7098623B2 (ja) 2017-08-10 2022-07-11 出光興産株式会社 潤滑油組成物、内燃機関、及び内燃機関の潤滑方法
CN110892052B (zh) * 2017-08-10 2022-08-02 出光兴产株式会社 润滑油组合物、内燃机、和内燃机的润滑方法
JPWO2019031404A1 (ja) * 2017-08-10 2020-07-02 出光興産株式会社 潤滑油組成物、内燃機関、及び内燃機関の潤滑方法
CN110892052A (zh) * 2017-08-10 2020-03-17 出光兴产株式会社 润滑油组合物、内燃机、和内燃机的润滑方法
US11326120B2 (en) 2017-08-10 2022-05-10 Idemitsu Kosan Co., Ltd. Lubricating oil composition, internal combustion engine, and lubrication method for internal combustion engine
US11649413B2 (en) 2018-05-18 2023-05-16 Eneos Corporation Lubricating oil composition for internal combustion engine
US11965142B2 (en) 2019-03-29 2024-04-23 Idemitsu Kosan Co., Ltd. Lubricating oil composition
WO2020203524A1 (fr) * 2019-03-29 2020-10-08 出光興産株式会社 Composition d'huile de graissage
JP7457695B2 (ja) 2019-03-29 2024-03-28 出光興産株式会社 潤滑油組成物
JP7442287B2 (ja) 2019-09-26 2024-03-04 Ｅｎｅｏｓ株式会社 内燃機関用潤滑油組成物
WO2021200045A1 (fr) * 2020-03-31 2021-10-07 出光興産株式会社 Composition d'huile lubrifiante et procédé d'utilisation d'huile lubrifiante
US20230183591A1 (en) * 2021-06-25 2023-06-15 Eneos Corporation Lubricating oil composition for internal combustion engine

Also Published As

Publication number Publication date
CN107207991A (zh) 2017-09-26
JPWO2016159006A1 (ja) 2018-01-25
US20180072962A1 (en) 2018-03-15

Similar Documents

Publication Publication Date Title
JP5483662B2 (ja) 潤滑油組成物
JP5345808B2 (ja) エンジン油組成物
WO2016159006A1 (fr) Composition d'huile lubrifiante
JP5689592B2 (ja) 潤滑油組成物
WO2010140446A1 (fr) Composition d'huile lubrifiante
JP5809582B2 (ja) 潤滑油組成物
WO2011083601A1 (fr) Composition lubrifiante
JP5630954B2 (ja) 潤滑油組成物
JP2009167278A (ja) 潤滑油組成物
WO2011083602A1 (fr) Composition lubrifiante
WO2010140392A1 (fr) Composition d'huile lubrifiante
JP2016020498A (ja) 潤滑油組成物
WO2012153548A1 (fr) Composition d'huile lubrifiante
JP5744771B2 (ja) 潤滑油組成物
WO2012153547A1 (fr) Composition d'huile lubrifiante
JP5711871B2 (ja) 潤滑油組成物
JP2011021056A (ja) 潤滑油組成物
JP6310798B2 (ja) 潤滑油組成物
JP2010090252A (ja) 潤滑油組成物
JP5815809B2 (ja) 潤滑油組成物
JP2014205858A (ja) 潤滑油組成物
JP5788917B2 (ja) 潤滑油組成物
JP5750218B2 (ja) 潤滑油組成物
JP2014133902A (ja) 潤滑油組成物
JP2014101527A (ja) 潤滑油組成物

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16772887

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017510054

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 15561670

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16772887

Country of ref document: EP

Kind code of ref document: A1