WO2005007787A1 - 内燃機関用潤滑油組成物 - Google Patents
内燃機関用潤滑油組成物 Download PDFInfo
- Publication number
- WO2005007787A1 WO2005007787A1 PCT/JP2004/007340 JP2004007340W WO2005007787A1 WO 2005007787 A1 WO2005007787 A1 WO 2005007787A1 JP 2004007340 W JP2004007340 W JP 2004007340W WO 2005007787 A1 WO2005007787 A1 WO 2005007787A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- acid
- carbon atoms
- branched
- composition
- Prior art date
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
- 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
-
- 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
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
-
- 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
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
- C10M2207/146—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings having carboxyl groups bound to carbon atoms of six-membeered aromatic rings having a hydrocarbon substituent of thirty or more carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/262—Overbased carboxylic acid salts derived from hydroxy substituted aromatic acids, e.g. salicylates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/282—Esters of (cyclo)aliphatic oolycarboxylic acids
- C10M2207/2825—Esters of (cyclo)aliphatic oolycarboxylic acids 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
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/04—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic 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
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
- C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
- C10M2215/064—Di- and triaryl amines
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- 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
- 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
- C10N2030/56—Boundary lubrication or thin film lubrication
-
- 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
- C10N2030/58—Elastohydrodynamic lubrication, e.g. for high compressibility layers
-
- 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
Definitions
- the present invention relates to a lubricating oil composition for an internal combustion engine, and more particularly, to a lubricating oil composition for an internal combustion engine capable of maximizing a friction reducing effect by using a specific ester-based lubricating base oil. About.
- Ester lubricating base oils are generally expected to be used for high-performance engine oils because of their high heat resistance and high viscosity index.
- the amount of ester base oil is limited to about 20% by mass or less in order to inhibit the effect of the friction modifier (for example, Patent Documents 1 to 7 below).
- the ester base oil tends to hinder the effect of the friction modifier in the boundary lubrication region. It is in a situation where the blending amount has to be limited.
- Patent Document 1 JP-A-5-279686
- Patent Document 2 JP-A-8-183985
- Patent Document 3 Japanese Patent Application Laid-Open No. 10-95474
- Patent Document 4 Japanese Patent Application Laid-Open No. 2001-34859-1
- Patent Document 5 U.S. Patent No. 4208292 specification
- Patent Document 6 U.S. Pat.No. 4,259,254
- Patent Document 7 U.S. Pat.No. 4,442,881
- the friction in the fluid lubrication region must be reduced. It is important that reducing the friction of the entire engine has a significant effect on the net fuel economy.
- the above technique is not suitable for friction in the boundary lubrication area, such as the SRV friction test. With only reduction in mind, no practical fuel-saving performance, especially in the fluid lubrication area, has been evaluated at all.More practically, when a large amount of ester base oil is blended, The fuel-saving performance is completely unknown.
- a lubricant composition for an internal combustion engine which has reduced friction in both the boundary lubrication region and the fluid lubrication region and has excellent fuel-saving performance in practical use, particularly an ester oil.
- an ester oil At present, practically no lubricating oil composition for internal combustion engines that can exhibit the characteristics of the base oil has been found.
- the present invention has been made in view of the above circumstances, and has as its object to provide a lubricating oil composition for an internal combustion engine containing an ester base oil capable of maximally exhibiting a friction reducing effect in a fluid lubrication region and a boundary lubrication region. I do.
- the present inventors have conducted intensive studies to solve the above problems, and as a result, a composition obtained by blending a specific ester base oil and a friction modifier is excellent in a friction reducing effect in a fluid lubrication region and a boundary lubrication region. This led to the completion of the present invention.
- the present invention provides (A) a kinematic viscosity at 100 ° C. of 3 to 8 mm 2 Z s, a viscosity index of 140 or more, a saponification value of 30 OmgKOHZg or less, and a total acid value of 0.
- a lubricating base oil containing an ester lubricating base oil of not more than 2 mg K OHZg contains at least a friction modifier selected from (B) ashless friction modifier and (C) molybdenum friction modifier.
- a lubricating oil composition for an internal combustion engine comprising one compounded oil.
- the lubricating base oil preferably contains (D) a mineral oil base oil and a polyolefin base oil having a kinematic viscosity at 100 ° C. of 1 to 8 mm 2 Zs.
- the content of the ester-based lubricating base oil is preferably at least 20% by mass based on the total amount of the base oil.
- the composition has a kinematic viscosity at 100 ° C of 4 to 9.3 mm 2 / s, a TBS viscosity at 150 ° C of 2.0 to 2.8 mPas, and a NOACK evaporation of 2 It is preferably adjusted to 5% by mass or less.
- the (B) ashless friction modifier is selected from ester, amine, amide, and ether friction modifiers having at least one alkyl or alkenyl group having 6 to 30 carbon atoms. Or two or more friction modifiers, wherein the (C) The molybdenum dicarbamate having an alkyl group having 8 to 13 carbon atoms is preferred as the molybdenum-based friction modifier.
- the composition preferably contains (E) 0.005 to 0.08% by mass of a phosphorus-containing wear inhibitor in terms of a phosphorus element.
- the (A) ester base oil in the lubricating oil composition for an internal combustion engine of the present invention needs to have a kinematic viscosity at 100 ° C. of 3 to 8 mm 2 / s, preferably 7 mm 2 / s. / s or less, more preferably 6 mm 2 / s or less, particularly preferably 5.5 mm 2 / s or less, and desirably 3.5 mm 2 / s or more.
- the kinematic viscosity at 100 ° C is less than 3 mm 2 Zs, there is a concern that the fuel-saving performance will deteriorate due to evaporation loss. If the kinematic viscosity exceeds 8 mm 2 Zs, the friction reduction performance in the fluid lubrication region may not be sufficient. Each is not preferred.
- the viscosity index of the ester base oil must be 140 or more, preferably 150 or more, more preferably 170 or more, and particularly preferably 200 or more.
- the upper limit of the viscosity index is not particularly limited, but is usually 300 or less, preferably 250 or less. If the viscosity index of the ester base oil is less than 140, the friction reducing performance in the fluid lubrication region may not be sufficiently obtained.
- the saponification value of the ester base oil must be 30 OmgKOHZg or less, preferably 26 OmgKOHZg or less, and the lower limit is not particularly limited, but is preferably 5 OmgKOH / g or more. It is more preferably 100 mg KOHZg or more.
- the ester base oil in the present invention it is desirable to use an ester base oil having a saponification value of more than 200 mgKOH / g and 300 mgKOH / g or less, and in some cases 200 mgKOH / g or less.
- the total acid value of the ester base oil is 0.2 mg KOHZg or less, preferably 0.1 mg KOHZg or less, more preferably 0.05 mg KOHZg or less.
- the total acid value of the ester base oil is more than 0.1 SmgKOH // g, it is not preferable because it is difficult to maintain the friction reducing effect for a long time.
- the (A) ester base oil in the lubricating oil composition for an internal combustion engine of the present invention is not particularly limited as long as it has the above-mentioned properties, and may be selected depending on synthesis conditions and raw material selection. Can be manufactured. Further, the ester base oil (A) having the above properties may be used alone, and as long as the mixture satisfies the above properties, a mixed ester base oil further blended with an ester base oil not satisfying the above properties It is good.
- the ester referred to here is an organic acid ester, and specific examples include esters of the following monohydric alcohols or polyhydric alcohols with monobasic acids or polybasic acids.
- the monohydric alcohol or polyhydric alcohol includes a monohydric alcohol or polyhydric alcohol having a hydrocarbon group having 1 to 30 carbon atoms, preferably 4 to 20 carbon atoms, and more preferably 6 to 18 carbon atoms. And the like.
- a monobasic acid or polybasic acid a monobasic acid or polybasic having a hydrocarbon group having 1 to 30 carbon atoms, preferably 4 to 20 carbon atoms, more preferably 6 to 18 carbon atoms Acids.
- hydrocarbon group having 1 to 30 carbon atoms examples include hydrocarbon groups such as an alkyl group, an alkenyl group, an alkylene group, a cycloalkyl group, an alkylcycloalkyl group, an aryl group, an alkylaryl group, and an arylalkyl group. Is mentioned.
- alkyl group examples include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a straight-chain or branched pentyl group, a straight-chain or Branched hexyl group, straight or branched heptyl group, straight or branched octyl group, straight or branched nor group, straight or branched decyl group, straight or branched chain Branched decyl group, linear or branched dodecyl group, linear or branched tridecyl group, linear or branched tetradecyl group, linear or branched pentadecyl group, Chain or branched hexadecyl group, straight or branched heptadecyl group, straight or branched o
- alkenyl group examples include a butyl group, a linear or branched propenyl group, a linear or branched butenyl group, a linear or branched pentenyl group, a linear or branched hexenyl group, a linear or branched Branched or heptyl group, straight or branched otathenyl group, straight or branched nonenyl group, straight or branched decenyl group, straight or branched decenyl group, straight or branched decenyl group, straight or branched chain Branched dodecenyl group, straight or branched tridecenyl group, straight or branched tetradecenyl group, straight or branched pentadecenyl group, straight or branched hexadecenyl group, straight or branched chain Ptadecenyl group, linear or branched octadeceny
- cycloalkynole group examples include a cycloalkyl group having 3 to 30 carbon atoms such as a pentyl group, a hexyl group, a cyclohexyl group, and a cyclooctyl group, preferably a cycloalkyl group having 4 to 20 carbon atoms. And particularly preferably a cycloalkyl group having 5 to 8 carbon atoms.
- alkylcycloalkyl group examples include a methylcyclopentyl group, a dimethylcyclopentyl group (including all structural isomers), a methylethylcyclopentyl group (including all structural isomers), a getylcyclopentyl group (including all structural isomers).
- Structural isomers are included.
- the aryl group is an aryl group having 6 to 20 carbon atoms, preferably an aryl group having 6 to 10 carbon atoms, such as f:!: Nyl group and naphthyl group.
- alkylaryl group examples include a tolyl group (including all structural isomers), an ethylphenyl group (including all structural isomers), a linear or branched propylphenyl group (including all structural isomers).
- the alkyl group further includes an aryl group, an alkylaryl group, and an arylalkyl group. And all the structural isomers are included.
- an alkylaryl group having 7 to 30 carbon atoms preferably an alkylaryl group having 7 to 20 carbon atoms, and particularly preferably. Is an alkylaryl group having 7 to 12 carbon atoms.
- arylalkyl group examples include a benzyl group, a phenylethyl group, a phenylpropyl group (including an isomer of a propyl group), a phenylbutyl group (including an isomer of a butyl group), a phenylpentyl group (an isomer of a pentyl group) N) aralkyl group having 7 to 30 carbon atoms, such as n-hexyl group (including isomers of hexyl group), preferably carbon number?
- arylalkyl groups particularly preferably an arylalkyl group having 7 to 12 carbon atoms.
- the hydrocarbon group having 1 to 30 carbon atoms is preferably an alkyl group or an alkenyl group.
- the hydrocarbon group having 1 to 30 carbon atoms is preferably an alkyl group or an alkenyl group. 4 007340
- Specific examples of the above monohydric alcohols include methanol, ethanol, propanol (1-propanol, 2-propanol), and butanol (1-butanol, 2-butanol, 2-methyl-1-prononol).
- Alkyl alcohols (these alkyl groups may be linear or branched); ethenol, propenol, butenonole, hexenonole, octenonole, decenenole, dodecennole, octadecenol (oleyl alcohol) Etc.) Monovalent alkenyl alcohols having 2 to 40 carbon atoms (these alkenyl groups may be linear or branched, and the position of the double bond is arbitrary. ) And mixtures thereof.
- polyhydric alcohols include ethylene glycol, ethylene glycol, polyethylene glycol, propylene glycol, dipropylene dalicol, polypropylene glycol, neopentyl glycol, 1,3-butanepandiol, 1,4-butanediol, 1,2-butanediol, 2-methylone 1,3-propanediol, 1,5-pentanedioyl / le, 1,6-hexanediole, 2-ethinole 2-methinole 1, 3-propanediole, 2-methinole 2,4-pentanediol, 1,7-heptanediole, 2-methyl-2-propynolee 1,3-propanediol, 2,2-jetinolee 1,3 1-propanediol, 1,8-octanediol, 1,9-nonanediol, 2-butyl-2-ethy
- Trimethylonolenolecan such as glycerin, trimethylolethane, trimethylolpropane, and trimethylolonebutane; 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanthriol, 1,2,3,4-butantetronore, sonorebitonere, ad Nitol, arabitol, xylitol, mannitol, etc., and polymers or condensates thereof (Eg, glycerin such as diglycerin, triglycerin, tetraglycerin
- Condensed compounds such as dioctamers, dimermethylolpropanes, etc., trimethylolpropane dimers, octamers, dipentaerythritols, etc., pentaerythritol dimers, tetramers, etc., sorbitan, sorbitol glycerin condensates Internal condensation compound, intermolecular condensation compound or self-condensation compound)).
- the alcohols may be added with alkylene oxides having 2 to 6 carbon atoms, preferably 2 to 4 carbon atoms, or a polymer or copolymer thereof to convert the hydroxyl groups of the alcohols into hydrocarbyl ethers or hydroxyl groups.
- Drocarbier esters may be used.
- alkylene oxides having 2 to 6 carbon atoms include ethylene oxide, propylene oxide, 1,2-epoxybutane ( ⁇ -butylene oxide), 2,3-epoxybutane (—butylene oxide), 2-epoxy-1-methylpropane, 1,2-epoxyheptane, 1,2-epoxyhexane and the like.
- the polymerization form of the oxyalkylene group is not particularly limited, and may be random copolymerization or block copolymerization.
- the alkylene oxide may be added to all of the hydroxyl groups or may be added to only a part of the hydroxyl groups. Good.
- the monobasic acids include methane acid, ethanoic acid (acetic acid), propanoic acid (propionic acid), butanoic acid (butyric acid, isobutyric acid, etc.), and pentanoic acid (valeric acid, isovaleric acid, pivalic acid, etc.).
- polybasic acids examples include ethanenic acid (oxalic acid), propanedioic acid (malonic acid, etc.), butanedioic acid (succinic acid, methylmalonic acid, etc.), pentanedioic acid (daltaric acid, ethylmalonic acid, etc.), Hexandioic acid (such as adipic acid), heptane diacid (such as pimelic acid), octane diacid (such as suberic acid), nonanniic acid (such as azelaic acid), decane diacid (such as sebacic acid), propene diacid, and butene 2-3 carbons such as diacid (maleic acid, fumaric acid, etc.), pentenedioic acid (citraconic acid, mesaconic acid, etc.), hexenedioic acid, heptenedioic acid, octenic acid, nonenniic acid, decened
- a saturated or unsaturated aliphatic dicarboxylic acid of 0 (these saturated or unsaturated aliphatics may be linear or branched, and the position of the unsaturated bond is also arbitrary); propanetrical Saturated or unsaturated aliphatic tricarboxylic acids such as carboxylic acid, butanetricarboxylic acid, pentanetricarboxylic acid, hexanetricarboxylic acid, heptanetricarboxylic acid, octanetricarboxylic acid, nonanetricarboxylic acid, and decanetricarbonic acid Or the unsaturated aliphatic may be linear or branched, and the position of the unsaturated bond is also arbitrary.); Saturated or unsaturated aliphatic tetracarboxylic acid (the saturated aliphatic or unsaturated aliphatic is It may be linear or branched, and the position of the unsaturated bond is also arbitrary.).
- ester base oil
- the most preferred ester base oil (A) in the present invention is a monovalent saturated or unsaturated fatty acid having 6 to 18 carbon atoms, preferably 12 to 18 carbon atoms. These fatty acids may be linear or branched, and the position of the double bond is arbitrary. ) And a C6 to C18, preferably C6 to C12, monovalent saturated or unsaturated fatty alcohol (these aliphatics may be linear or branched, and The bond position is arbitrary.) An ester with a divalent saturated or unsaturated fatty acid having 6 to 18 carbon atoms, preferably 6 to 12 carbon atoms (these fatty acids may be linear or branched.
- the position of the double bond is arbitrary.
- Saturated fatty acids (these fatty acids may be linear or branched, and the position of the double bond is arbitrary) and Esters with a monovalent saturated aliphatic alcohol having 6 to 18 primes, preferably 6 to 12 carbons (these aliphatics may be linear or branched), and 6 to 18 carbons, preferably Is a divalent saturated fatty acid having 6 to 12 carbon atoms (these fatty acids may be linear or branched) and a monovalent saturated aliphatic having 6 to 18 carbon atoms, preferably 6 to 12 carbon atoms.
- the ester is selected from esters with alcohols (these aliphatics may be linear or branched), and monounsaturated fatty acids having 12 to 18 carbon atoms (these fatty acids are The chain may be linear or branched, and the position of the double bond is arbitrary.) And a monovalent saturated aliphatic alcohol having 9 to 12 carbon atoms (these aliphatics may be linear or branched).
- divalent saturated fatty acids having 6 to 12 carbon atoms (E.g., dodecyl oleate, etc.), divalent saturated fatty acids having 6 to 12 carbon atoms (these fatty acids are linear, May be branched.) And a monovalent saturated branched aliphatic alcohol having 10 to 12 carbon atoms (e.g., diisononyl sebacate).
- the pour point of the ester base oil (A) in the present invention is not particularly limited, but is preferably 120 ° C or lower, more preferably 130 ° C or lower, and particularly preferably 1 ° C or lower. 40 ° C or less. By setting the pour point at 120 ° C. or lower, it is possible to obtain a composition having excellent low-friction properties in a low-temperature region, and excellent in starting properties or fuel-saving performance immediately after starting.
- the content of the ester base oil (A) is not particularly limited, but is preferably 20% by mass or more, more preferably 25% by mass or more based on the total amount of the lubricating oil base oil. , 50% by mass or more, more preferably 70% by mass It is particularly preferable that the content is not less than 100% by mass, but from the viewpoint of the sealing material swelling performance, the content of the ester base oil is preferably not more than 95% by mass, and not more than 90% by mass. It is more preferable that the content be 85% by mass or less.
- mineral oil-based base oils and ester-based oils that do not satisfy the above (A) ester-based oils may be blended as lubricating oil base oils other than the above-mentioned ester-based oils constituting the lubricating oil base oil.
- Synthetic base oils other than base oils and ester base oils may be mentioned.
- a mineral base oil specifically, lubricating oil fractions obtained by depressurizing distillation of atmospheric residual oil obtained by atmospheric distillation of crude oil are subjected to solvent removal, solvent extraction, and hydrocracking. , Refined by one or more treatments such as solvent dewaxing, hydrorefining, etc., or mineral oils with wax insensitivity, base oils produced by isomerizing GTL WAX (gas to liquid wax), etc. Can be exemplified.
- The% ⁇ 4 of the mineral base oil is not particularly limited, but is preferably 10% by mass or less, more preferably 6% by mass or less, still more preferably 3% by mass or less, and particularly preferably 2% by mass or less. is there. If the base oil has a percentage of more than 10% by mass, it is difficult to maintain the friction reducing effect for a long time, which is not preferable.
- the total aromatic content indicates the percentage of the number of aromatic carbons to the total number of carbons measured by ASTM D3238-85.
- the sulfur content of the mineral base oil is not particularly limited, but is preferably 0.05% by mass or less, more preferably 0.01% by mass or less, and more preferably 0.01% by mass or less. It is particularly preferred that the content is not more than 0.5% by mass.
- synthetic base oils other than ester base oils include polybutene or hydrides thereof; 1-polyolefins such as mono-otaten oligomers and 1-decene oligomers or hydrides thereof; alkylnaphthalene, alkylbenzene Or mixtures thereof.
- the kinematic viscosity at 100 ° C. of the lubricating base oil other than the (A) ester base oil is not particularly limited, but is preferably l S mn ⁇ Z s, and is preferably 2 to 6 mm 2 Z Particularly preferred is s.
- the viscosity index of the lubricating base oil other than the (A) ester base oil is not particularly limited, but is preferably 80 or more, and more preferably. Is 95 or more, particularly preferably 120 or more.
- the mineral base oil, the synthetic base oil, or an arbitrary mixture of two or more lubricating oils selected from these can be used.
- examples include one or more mineral base oils, one or more synthetic base oils, and a mixed oil of one or more mineral base oils and one or more synthetic base oils. It is preferable to use a base oil and Z or a polyolefin base oil.
- kinematic viscosity of the lubricating base oils containing components is not particularly limited kinematic viscosity of the lubricating base oils containing components, kinematic viscosity at its 100 ° C (212 ° F), preferably not more than 20 mm 2 / s, more preferably 1 0 mm 2 / s or less, more preferably 5 mm 2 / s, particularly preferably 4.3 mm 2 / s.
- the kinematic viscosity is preferably 2 mm 2 Zs or more, more preferably 3 m 2 Zs or more, and particularly preferably 3.5 mm 2 / s or more.
- the kinematic viscosity of the lubricating base oil at 100 ° C exceeds 2 OmmV s, the low-temperature viscosity characteristics deteriorate, while if the kinematic viscosity is less than 2 mm 2 / s, the oil film at the lubricating point Insufficient formation leads to poor lubricity, and large loss of evaporation of the lubricating base oil is undesirable.
- the evaporation loss of the lubricating base oil containing the component (A) is preferably 25% by mass or less, more preferably 22% by mass or less, and more preferably 20% by mass or less in NOACK evaporation amount. Is particularly preferred. If the NOACK evaporation amount of the lubricating base oil exceeds 25% by mass, the evaporation loss of the lubricating oil is large, which leads to the deterioration of the fuel-saving performance due to the increase in viscosity.
- the NO ACK evaporation here is measured according to ASTM D 5800, and 60 g of a lubricating oil sample is reduced at 250 ° C and a reduced pressure of 20 mmH 2 O (196 Pa). And the amount of evaporation after holding for 1 hour.
- the viscosity index of the lubricating base oil containing the component (A) is not particularly limited, but is preferably 80 or more, more preferably 1 or more, so as to obtain excellent viscosity characteristics from a low temperature to a high temperature. 00 or more, and more preferably 120 or more. If the viscosity index is less than 80, the low-temperature viscosity characteristics deteriorate, which is not preferable.
- the friction modifier used in the lubricating oil composition for an internal combustion engine of the present invention is selected from (B) an ashless friction modifier and (C) a molybdenum friction modifier which have an effect of reducing the friction coefficient. Modifiers are included.
- the ashless friction modifier any compound usually used as a friction modifier for lubricating oils can be used. Examples of these include a straight-chain alkyl or straight-chain alkenyl group having 6 to 30 carbon atoms, preferably an alkyl group or an alkenyl group, particularly a straight-chain alkyl or alkenyl group having 6 to 30 carbon atoms, preferably 12 to 18 carbon atoms. Fatty acid esters, amines, amides, ethers, etc., having at least one in the molecule.
- alkyl group or alkenyl group having 6 to 30 carbon atoms examples include a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, a pendecyl group, a dodecyl group, a tridecyl group, and a tetradecyl group.
- Alkyl groups such as alkyl groups (these alkyl groups may be linear or branched); hexenyl group, heptenyl group, octyl group, nonenyl group, decenyl group, pendecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group Group, pentadecenyl group, hex Senyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, icoseny
- Fatty acid esters include glycerin monoolate, glycerin diolate, glycerin triolate, glycerin monostearate, glycerin distearate, sorbitan monoolate, sorbitandiolate, sorbitan triolate, sorbitan monostearate, etc. And esters of a linear or branched, preferably linear, fatty acid having 7 to 31 carbon atoms with an aliphatic monohydric alcohol or an aliphatic polyhydric alcohol.
- Examples of the amine include linear or branched, preferably linear, aliphatic monoamines having 6 to 30 carbon atoms, such as dodecyljetanolamine, oleyljetanolamine, dodecylamine, oleylamine, and stearylamine. Examples thereof include linear or branched, preferably linear aliphatic polyamines, or alkylene oxide adducts of these aliphatic amines.
- Examples of the amide include linear or branched, preferably oleyl amides, amides of oleic acid and oleylamine, stearyl amides, and amides of stearic acid and stearyl lamines, each having 6 to 30 carbon atoms. Examples thereof include amides of a linear fatty acid and an amine, for example, ammonia, and an amide of a linear or branched, preferably linear, aliphatic amine having 1 to 30 carbon atoms.
- ether examples include linear or branched, preferably linear aliphatic ethers having 6 to 30 carbon atoms, such as glycerin monooleyl ether and glycerin monostealyl ether.
- Preferred examples of the (C) molybdenum-based friction modifier include a sulfur-containing molybdenum complex, specifically, molybdenum dithiocarbamate, molybdenum dithiophosphate, and other sulfur-containing molybdenum complexes.
- a sulfur-containing molybdenum complex specifically, molybdenum dithiocarbamate, molybdenum dithiophosphate, and other sulfur-containing molybdenum complexes.
- molybdenum dithiophosphate specifically, for example, a compound represented by the following general formula (1) can be used.
- I 11 , R 12 , R 13 and R 14 may be the same or different, and each have 2 to 30 carbon atoms, preferably 5 to 18 carbon atoms. It preferably represents an alkyl group having 5 to 12 carbon atoms or a hydrocarbon group such as an (alkyl) aryl group having 6 to 18 carbon atoms, preferably 10 to 15 carbon atoms.
- ⁇ 1 ⁇ 2 , ⁇ 3 and ⁇ 4 each represent a sulfur atom or an oxygen atom.
- alkyl group examples include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, pendecyl, dodecyl, tridecyl, tetradecyl, and pentadecyl.
- a hexadecyl group, a heptadecyl group, an octadecyl group, etc. which may be a primary alkyl group, a secondary alkyl group, or a tertiary alkyl group, and may be linear or branched.
- Preferred examples of the (alkyl) aryl group include phenyl, tolyl, and ethyl.
- the alkyl group may be a primary alkyl group, a secondary alkyl group, or a tertiary alkyl group, and may be linear or branched. Further, these (alkyl) aryl groups include all substituted isomers in which the substitution position of the alkyl group on the aryl group is different.
- molybdenum dithiophosphate examples include molybdenum disulfide dithiophosphate, molybdenum dipropyl dithiophosphate, molybdenum dibutyl dithiophosphate, molybdenum dipentyl dithiophosphate, and molybdenum dihexyl dithiophosphate.
- molybdenum sulfide molybdenum dioctyl dithiophosphate, molybdenum didodecyl dithiophosphate, molybdenum didodecyl dithiophosphate, molybdenum sulfide (butylphenyl) dithiophosphate, sulphide molybdenum disulfide phosphate Oxymolybdenum dibutyldithiophosphate, oxymolybdenum dibutyl dithiophosphate, oxymolybdenum sulfide Oxymolybdenum dipentyldithiophosphate, oxymolybdenum disulfide hexyldithiophosphate, oxymolybdenum dioctyldithiophosphate, oxymolybdenum didecyldithiophosphate, oxymolybdenum disulfide Dodecyldithiophosphate, oxymol
- the position is arbitrary.), And mixtures thereof.
- these molybdenum dithiophosphates compounds having hydrocarbon groups with different numbers of carbon atoms and / or structures in one molecule can also be preferably used.
- the molybdenum dicarbamate for example, a compound represented by the following general formula (2) can be used.
- R 15 , R 16 , R 17 and R 18 may be the same or different and each have 2 to 24 carbon atoms, preferably 4 to 13 carbon atoms. It represents an alkyl group or a hydrocarbon group such as a (alkyl) aryl group having 6 to 24 carbon atoms, preferably 10 to 15 carbon atoms.
- the ⁇ 5, ⁇ 6, ⁇ 7 and Upsilon 8 are each represents a sulfur atom or an oxygen atom.
- alkyl group examples include ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, pendecyl, dodecyl, tridecyl, tetradecyl, and pentadecyl.
- a hexadecyl group, a heptadecyl group, an octadecyl group, etc. which may be a primary alkyl group, a secondary alkyl group, or a tertiary alkyl group, and may be linear or branched.
- the (alkyl) aryl group include phenyl, tolyl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, octylphenyl, nonylphenyl, and decynolephenyl.
- an alkyl group such as an undecyl phenyl group and a dodecyl phenyl group.
- the alkyl group may be a primary alkyl group, a secondary alkyl group or a tertiary alkyl group, and may be linear or branched.
- these (alkyl) alkyl groups include all substituted isomers in which the alkyl group is substituted on the aryl group at different positions.
- dithiocarbamate groups such as those disclosed in WO98 / 26030 or WO99 / 313113 are used. Having a coordinated structure.
- molybdenum dithiocarbamate examples include molybdenum disulfide dithiocarbamate, molybdenum dipropyl dithiocarbamate, molybdenum dibutyl dithiocarbamate, molybdenum dipentyl dithiocarbamate, and molybdenum dihexyldicarbamate.
- molybdenum dithiocarbamates compounds having a different number of carbon atoms and different hydrocarbon groups of Z or structure in one molecule can be preferably used.
- sulfur-containing organic molybdenum complexes include molybdenum compounds (for example, molybdenum oxide, molybdenum oxide such as molybdenum trioxide, ortho molybdic acid, paramolybdic acid, molybdic acid such as (poly) molybdenum sulfide, etc.
- molybdic acid molybdenum salts such as ammonium salt, molybdenum disulfide, molybdenum trisulfide, molybdenum pentasulfide, molybdenum sulfide such as polymolybdenum sulfide, molybdenum sulfide, metal salts of molybdenum sulfide or amide salts , Molybdenum halides such as molybdenum chloride) and sulfur-containing organic compounds (for example, alkyl (thio) xanthate, thiadiazole, mercaptothiadiazole, thiocarbonate, tetrahydrocarbylthiuram disulfide, bis ( (Chio) Hyde port Cal bilge Chio phosphonate) disulfide, organic (poly) Sarufuai de, leaving at be mentioned complexes of the sulfide ester), or other organic compounds.
- component (C) of the present invention an arbitrary mixing ratio of one or more molybdenum dithiophosphates selected from the above and one or more molybdenum dithiocarbamates or other sulfur-containing molybdenum complexes Can also be used as preferred.
- molybdenum dithiocarbamate particularly molybdenum dithiocarbamate having an alkyl group having 8 to 13 carbon atoms, is particularly preferable because it can exhibit an excellent friction reducing effect stably for a long period of time.
- the content of the component (C) is not particularly limited, but is usually from 100 to 200 ppm by mass in terms of molybdenum element based on the total amount of the composition. 100 to 1500 mass ppm, particularly preferably 200 to 100 mass ppm. When the content of the component (C) exceeds 2000 mass ppm, it is difficult to obtain a friction reduction effect commensurate with the content, increase ash and sulfur content, and may be inferior in storage stability.
- the lubricating oil composition of the present invention preferably contains (E) a phosphorus-containing antiwear agent.
- the phosphorus-containing wear inhibitor is not particularly limited as long as it contains phosphorus in the molecule, and examples thereof include, for example, ester phosphite having 1-3 hydrocarbon groups having 1 to 30 carbon atoms, Phosphoric acid monothioester, Phosphoric acid dithioester, Trithiophosphorous acid ester, Phosphoric acid ester, Phosphoric acid ester, Phosphonic acid monothioester, Phosphonic acid monothioester, Phosphonic acid monothioester, Phosphonic acid ester, Phosphonic acid monothioester, Phosphonic acid monothioester Phosphonic acid monothioester Phosphorus-containing compounds such as dithioester and phosphonate trithioester; and amine salts or metal salts thereof; and carboxylic acid derivatives.
- ester phosphite having 1-3 hydrocarbon groups having 1 to 30 carbon atoms
- the hydrocarbon group having 1 to 30 carbon atoms referred to herein includes an alkyl group, an alkenyl group, and an alkylene group having 1 to 30 carbon atoms, preferably 3 to 18 carbon atoms, and more preferably 4 to 12 carbon atoms.
- hydrocarbon groups such as cycloalkyl group, alkylcycloalkyl group, aryl group, alkylaryl group and arylalkyl group.
- Examples of the amine include ammonia, a linear or branched, preferably linear, aliphatic monoamine having 1 to 30 carbon atoms, and a linear or branched aliphatic monoamine. Examples thereof include linear aliphatic polyamines and alkylene oxide adducts of these aliphatic amines.
- the metals mentioned here include lithium metal such as lithium, sodium, potassium and cesium, alkaline earth metals such as calcium, magnesium and barrier, zinc, copper, iron, lead, nickel, silver and manganese. And heavy metals such as molybdenum. Of these, alkaline earth metals such as lithium, calcium and magnesium and zinc, particularly zinc, are preferred.
- the carboxylic acid derivative referred to herein includes those obtained by adding the above phosphorus-containing compound to a carboxylic acid having 1 to 30 carbon atoms, preferably 2 to 8 carbon atoms, and particularly preferably 3 to 4 carbon atoms.
- Examples thereof include dithiophosphorylated propionic acid and metal salts thereof.
- preferred are zinc dithiophosphate and zinc phosphate having a primary or secondary alkyl group having 4 to 8 carbon atoms, such as zinc dithiophosphate having a secondary alkyl group. Is particularly preferred.
- the content of (E) the phosphorus-containing wear inhibitor is not particularly limited, but is usually 0.05 to 0.1 mass% in terms of phosphorus element based on the total amount of the composition. 0.05-0.08 mass. / 0 , more preferably 0.01 to 0.05 mass%.
- the phosphorus content is set to 0.08% by mass or less, or less than 0.08% by mass, the influence on the exhaust gas purification catalyst can be reduced as much as possible, and the fuel-saving performance can be easily maintained for a long period of time.
- any additives generally used for lubricating oils can be added according to the purpose in order to further improve the performance.
- additives examples include metal detergents, ashless dispersants, antioxidants, wear inhibitors other than the component (E), viscosity index improvers, corrosion inhibitors, antioxidants, demulsifiers, Additives such as a metal deactivator, an antifoaming agent, and a coloring agent are mentioned.
- metal-based detergent examples include, for example, alkali metal sulfonate or alkaline earth metal sulfonate, alkali metal phenate or alkaline earth metal phenate, alkali metal salicylate or alkaline earth metal salicylate, alkali Examples include metal phosphonates, alkaline earth metal phosphonates, and mixtures thereof.
- alkali metal or alkaline earth metal sulfonate for example, an alkyl aromatic compound having a molecular weight of 100 to 150, preferably 200 to 700 is used.
- Alkali metal salts or alkaline earth metal salts particularly magnesium salts and Z or calcium salts of alkyl aromatic sulfonic acids obtained by the conversion are preferably used.
- alkyl aromatic sulfonic acids so-called petroleum sulfonic acids are used. ⁇ Synthetic sulfonic acid and the like.
- the petroleum sulfonic acid generally, a so-called mahoganic acid, which is obtained by sulfonating an alkyl aromatic compound of a lubricating oil fraction of a mineral oil and is by-produced during the production of white oil.
- synthetic sulfonic acids include, for example, alkyl Alkylene benzene having a linear or branched alkyl group, which is obtained as a by-product from a benzene production plant or obtained by alkylating polyolefin to benzene, which is sulfonated or dinonyl Sulfonated naphthalene or the like is used.
- the sulfonating agent for sulfonating these alkyl aromatic compounds is not particularly limited, but fuming sulfuric acid or sulfuric acid is usually used.
- alkali metal or alkaline earth metal phenate more specifically, an alkylphenol having at least one linear or branched alkyl group having 4 to 30 carbon atoms, preferably 6 to 18 carbon atoms
- the alkali metal or alkaline earth metal salicylate includes at least one straight-chain or branched alkyl group having 4 to 30 carbon atoms, preferably 6 to 18 carbon atoms.
- Alkali metal salts or alkaline earth metal salts of alkylsalicylic acid, particularly magnesium salts and / or calcium salts, are preferably used.
- Alkali metal or alkaline earth metal sulfonates, alkali metal or alkaline earth metal phenates and alkali metal or alkaline earth metal salicylates include alkyl aromatic sulfonic acids, alkyl phenols, and alkyl phenol sulphites. , Mannich reaction products of alkylphenols, alkylsalicylic acid, etc., directly with metal salts such as oxides or hydroxides of alkali metals or alkaline earth metals, or once sodium salts, potassium salts, etc.
- neutral salts obtained by, for example, substituting an alkaline earth metal salt with an alkaline earth metal salt, but also these neutral salts (normal salts) and excess alkali metal or alkaline earth salt Metal salt, Al metal or Al earth metal base (Al metal or Al earth) Hydroxides and oxides) in the presence of water, and neutral salts (normal salts) in the presence of carbon dioxide gas or boric acid or borate.
- Overbased salts (ultrabasic salts) obtained by reacting with a base such as a hydroxide of a metal or an alkaline earth metal are also included. These reactions are usually carried out in a solvent The reaction is performed in an aliphatic hydrocarbon solvent such as xane, an aromatic hydrocarbon solvent such as xylene, a light lubricating oil or a base oil.
- Metal-based detergents are usually commercially available in a diluted state with a light lubricating base oil or the like, and are available, but generally have a metal content of 1.0 to 20% by mass. It is desirable to use those having 2.0 to 16% by mass.
- the total base number of the metal detergent is generally 0 to 500 mgKOHZg, preferably 20 to 450 mgKOHZg.
- the total base number as used herein means the total base number by the perchloric acid method measured in accordance with JIS K 2501 “Petroleum products and lubricating oil-neutralization number test method” 7.
- one or more metal-based detergents selected from alkali metal or alkaline earth metal sulfonates, phenates, salicylates and the like can be used.
- a metal-based detergent Alrikari metal or Alrioli earth metal salicylate is particularly preferable in that a friction reducing effect can be stably obtained over a long period of time.
- the upper limit of the content of the metal-based detergent is not particularly limited, but is usually 0.5% by mass in terms of a metal element based on the total amount of the composition. It is preferable to adjust the amount together with other additives so as to be 1.2% by mass or less. From such a viewpoint, the upper limit value of the content of the metal-based detergent is more preferably 0.3% by mass in terms of a metal element, more preferably 0.3% by mass, based on the total amount of the composition.
- the content is 25% by mass, particularly preferably 0.2% by mass.
- the lower limit is not particularly limited, but is 0.01% by mass, preferably 0.02% by mass, and particularly preferably 0.05% by mass. / 0 .
- any ashless dispersant used in lubricating oils can be used.
- a linear or branched alkyl group having 40 to 400 carbon atoms or an alkylene group may be used in the molecule.
- at least one nitrogen-containing compound or a derivative thereof, or a modified product of alkenylsuccinic acid imide may be blended.
- This alkyl group or alkenyl group has 40 to 400 carbon atoms, preferably 60 to 400 carbon atoms.
- the alkyl group or the alkenyl group may be linear or branched, but is preferably, for example, a derivative derived from an oligomer of an olefin such as propylene, 1-butene or isobutylene, or a oligomer of ethylene and propylene. Such as a branched alkyl group and a branched alkenyl group.
- ashless dispersant examples include the following compounds. One or more compounds selected from these can be used.
- Succinic acid imid having at least one alkyl or alkenyl group having 40 to 400 carbon atoms in the molecule, or a derivative thereof
- examples of the a) succinic acid imide include compounds represented by the following general formulas (3) and (4).
- R 2 ° represents an alkyl group or an alkenyl group having 40 to 400 carbon atoms, preferably 60 to 350 carbon atoms, and h represents an integer of 1 to 5, preferably 2 to 4.
- R 21 and R 22 each independently represent an alkyl group or an alkenyl group having 40 to 400, preferably 60 to 350 carbon atoms, and a polybutenyl group It is preferable that i represents an integer of 0 to 4, preferably 1 to 3.
- succinic acid imid is a so-called monotype succinic acid imid represented by formula (3) in which succinic anhydride is added to one end of a polyamine, and a succinic anhydride added to both ends of polyamine.
- the force S containing the so-called bis-type succinic acid imid represented by (4), the composition of the present invention may include any of them, or a mixture thereof.
- the method for producing these succinic imides is not particularly limited.
- a compound having an alkyl group or an alkenyl group having 40 to 400 carbon atoms is reacted with maleic anhydride at 100 to 20 ° C. It can be obtained by reacting the alkyl succinic acid or alkenyl succinic acid thus obtained with a polyamine.
- the polyamine include diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine.
- benzylamine may be a compound represented by the following general formula (5).
- R 2 3 the number 4 0-4 0 0 atoms, preferably represents a 6 0-3 5 0 alkyl or alkenyl group, j is:! To 5, preferably an integer of 2 to 4.
- a polyolefin such as a propylene oligomer, a polybutene, or an ethylene- ⁇ -olefin copolymer is reacted with a phenol to form an alkylphenol. It can be obtained by reacting formaldehyde with a polyamine such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine by a Mannich reaction.
- examples of the c) polyamine include compounds represented by the following general formula (6).
- R 2 4 the number 4 0-4 0 0 atoms, preferably 6 0-3 5 0 alkyl
- k represents an integer of 1 to 5, preferably 2 to 4.
- the method for producing this polyamine is not limited at all.
- the chlorinated polyamine is added to ammonia, ethylenediamine, diethylenetol. It can be obtained by reacting a polyamine such as liamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine.
- Examples of the derivative of the nitrogen-containing compound mentioned as an example of the ashless dispersant include, for example, monocarboxylic acid (fatty acid or the like) having 1 to 30 carbon atoms, oxalic acid, phthalic acid, trimellit, So-called acid denaturation by neutralizing or amidating some or all of the remaining amino group and ⁇ or imino group by the action of a polycarboxylic acid having 2 to 30 carbon atoms such as an acid or pyromellitic acid Compound: a so-called boron-modified compound in which boric acid acts on the above-mentioned nitrogen-containing compound to neutralize or amidate some or all of the remaining amino and / or imino groups; And a modified compound obtained by combining the above-mentioned nitrogen-containing compound with two or more kinds of modifications selected from acid modification, boron modification, and sulfur yellow modification.
- the boron-modified compound of alkenyl succinic acid imid is excellent in heat resistance and antioxidant
- the ashless dispersant When the ashless dispersant is contained in the lubricating oil composition of the present invention, its content is usually 0.01 to 20% by mass, preferably 0.1 to 10% by mass, based on the total amount of the lubricating oil composition. mass. /. It is. When the content of the ashless dispersant is less than 0.01% by mass, the effect on the base number maintenance at high temperatures is small, while when it exceeds 20% by mass, the low-temperature fluidity of the lubricating oil composition is low. It is not preferable because it greatly deteriorates.
- the antioxidant any one generally used in lubricating oils such as a funinol antioxidant, a diamine antioxidant, and a metal antioxidant can be used.
- antioxidants include 4,4, -methylenebis (2,6-di-tert-ptinolephenol), 4,4'-bis (2,6-di-tert-butynolephenol) , 4,4'-bis (2-methynole 6-tert-butynolephenol), 2,2,1-methylenebis (4-ethynole 6-tert-ptynolepheneno), 2,2, -methylenebis (4-methyl-6-) tert-butylphenol, 4,4,1-butylidenebis (3-methyl-6-tert-butylphenylenole),, 4'-isopropylidenebis (2,6-ditert-butyl / lephenol), 2, 2, -Methylenebis (4-methyl-6-noerphenol), 2,2, -isobutylidenebis (4,
- amine-based antioxidant examples include phenyl-2- ⁇ -naphthylamine, alkylphenyl ⁇ -naphthylamine, and dialkyldiphenylamine. These may be used in combination of two or more.
- the above phenolic antioxidants and amine antioxidants may be used in combination.
- an antioxidant When an antioxidant is contained in the lubricating oil composition of the present invention, its content is usually not more than 5.0% by mass, preferably not more than 3.0% by mass, based on the total amount of the lubricating oil composition. It is preferably at most 2.5% by mass. If the content exceeds 5.0% by mass, it is not preferable because sufficient antioxidant properties cannot be obtained in proportion to the compounding amount. On the other hand, its content is preferably at least 0.1% by mass, more preferably 1% by mass, based on the total amount of the lubricating oil composition in order to further enhance the base number retention and high-temperature detergency during the lubricating oil deterioration process. That is all.
- antiwear agent other than the component (E) examples include disulfides, sulfides, sulfurized fats and oils, and sulfur-containing compounds such as zinc dithiocarbamate and dithiocarbamate. Usually, these can be contained in the range of 0.05 to 5% by mass based on the total amount of the lubricating oil composition as long as the performance of the composition of the present invention is not significantly impaired.
- the viscosity index improver examples include a so-called non-dispersion type viscosity index improver such as a polymer or copolymer of one or more monomers selected from various methacrylates or a hydrogenated product thereof. Or a so-called dispersion type viscosity index improver obtained by copolymerizing various methacrylates containing a nitrogen compound, a non-dispersion type or dispersion type ethylene-olefin copolymer (propylene is used as ⁇ -olefin, 1 Butene, 11-pentene, etc.) or its hydride, polyisobutylene or its hydrogenated product, hydrogenated styrene-one-gen copolymer, styrene-mono-maleic anhydride copolymer, polyalkylstyrene, etc. Is mentioned.
- a so-called non-dispersion type viscosity index improver such as a polymer or copolymer of one or
- the number average molecular weight of the viscosity index improver is usually from 5,000 to 1,000, 000, preferably 100, in the case of dispersion type and non-dispersion type polymethacrylate. , 000 to 900, 000, when polyisobutylene or a hydride thereof is used, it is usually 800 to 5,000, preferably 1, 000 to 4> 0000.
- the product is an ethylene- ⁇ -olefin copolymer or a hydride thereof, a product of usually 800 to 500,000, preferably 3,000 to 200,000 is used.
- a lubricating oil composition having particularly excellent fuel-saving performance can be obtained.
- One or more compounds arbitrarily selected from the above viscosity index improvers can be contained in optional amounts.
- the content of the viscosity index improver is usually 0.1 to 20% by mass based on the total amount of the composition.
- corrosion inhibitor examples include benzotriazole-based, tolyltriazole-based, thiadiazole-based, and imidazole-based compounds.
- fire retardant 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 deactivator examples include, for example, imidazoline, pyrimidine derivative, alkinorethiadiazole, mercaptobenzothiazole, benzotriazonole or its derivative, 1,3,4-thiadiazole polysulfide, 1,3,4-thiadiazolinolate 2 , 5-bisdialkyldithiocarbamate, 2- (alkinoresitio) benzoimidazole, and j3_ (o-carboxybenzylthio) propionnitrile.
- antifoaming agent examples include silicone, fluorosilicole, and fluoroalkyl ether.
- the content is 0.005 to 5% by mass for each of the corrosion inhibitor, the antioxidant, and the demulsifier based on the total amount of the composition, and the metal inertness. It is usually selected in the range of 0.005 to 1% by mass for the agent and 0.0005 to 1% by mass for the defoaming agent.
- the lubricating oil composition for an internal combustion engine of the present invention has a kinematic viscosity at 100 ° C of 4 to 9.3 mm 2 Zs, preferably 8.5 mm 2 / s or less, and a TBS viscosity at 150 ° C of 2. 0 to 2.8 mPa's, preferably 2.3 to 2.7 mPa's, the NOACK evaporation amount is desirably adjusted to 25% by mass or less, preferably 20% by mass or less. .
- the friction reduction effect in the fluid lubrication region is small, which is not preferable. If the kinematic viscosity at 00 ° C is less than 4 mm 2 Zs and the NOACK evaporation exceeds 25% by mass, the evaporation loss of the lubricating oil will be greater, which is not preferable. Is less than 2. OmP a ⁇ s, which is not preferable because it does not have sufficient oil film retention.
- the lubricating oil composition for an internal combustion engine of the present invention can reduce the friction in both the fluid lubrication region and the boundary lubrication region to the maximum, and cannot be realized with a conventional fuel-efficient lubricating oil mixed with an ester-based base oil. It has the effect that it has.
- the lubricating oil composition for an internal combustion engine of the present invention is useful not only as a lubricating oil composition for an internal combustion engine such as gasoline engine oil, gas engine oil, and diesel engine oil, but also for other fuel-saving or low-friction properties.
- Suitable as lubricating oil requiring performance for example, lubricating oil for drive system such as automatic or manual transmission, grease, hydraulic oil, turbine oil, compressor oil, bearing oil, refrigerating oil, etc. Can be used.
- the friction torque improvement rate was evaluated based on the composition of Comparative Example 1. Although the composition of Comparative Example 1 was excellent in the friction reduction performance in the boundary lubrication region, the friction reduction performance in the fluid lubrication region was inadequate. When the frictional torque reduction rate in the fluid lubrication region shows a positive value, it indicates that the composition is excellent in both friction reduction performance, and when it shows a negative value, it indicates that the friction has increased. Show.
- a 20% by mass of polyphenol (hydrogenated 1-decene oligomer) having a kinematic viscosity of 4 mm 2 / s at 100 ° C was added to a base oil consisting of 20% by mass, a friction modifier (glycerin monoester), metal System detergent (overbased potassium salicylate), ashless dispersant (imido succinate), extreme pressure agent (zinc dithiophosphate with secondary alkyl group), antioxidant (alkylated diphenylamine) ),
- a viscosity index improver disersion type polymethacrylate
- an antifoaming agent sicone
- Example 3 A composition was prepared that was identical to Example 1 except that oleyl jetanolamine was used instead of glycerin monoolate. (Example 3)
- Example 2 The same composition as in Example 1 was prepared except that molybdenum dithiocarbamate having an alkyl group having 8 to 13 carbon atoms was used instead of glycerin monoolate.
- the kinematic viscosity at 100 ° C is 4 mm 2 / s
- the viscosity index is 225
- the saponification value is 126 mgKOH / g
- the total acid value is 0.0 lmgKOH / g. except that the dodecyl O rate using 80 mass 0/0 was prepared by the same composition and the actual ⁇ 3.
- Example 2 The same composition as in Example 1 was prepared except that 100% by mass of poly- ⁇ -olefin was used as a base oil.
- Example 1 As base oil, instead of diisononyl sebacate, trimethylolpropane and kinematic viscosity at 100 ° C of 4 mm 2 Zs, viscosity index of 130, saponification value of 28 OmgKOH / g, and total acid value of 0.03 mgKOHZg are used.
- the same composition as in Example 1 was prepared except that 80% by mass of an ester with carboxylic acid (chemical mixture) of Formulas 8, 10 and 12 was used.
- the kinematic viscosity at 100 ° C is 4 mm 2 / s
- the viscosity index is 150
- the saponification value is 330 mg KO HZ g
- the total acid value is 0.03 mgKOH / g
- Example 1 Example 2 Example 3
- Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3
- Type SEHA "SIN ⁇ SEHA" Synthesis ⁇ Sinic acid ⁇ 'T'Syl ⁇ ⁇ Gelicerin triesi ⁇ Isono :: Luc'Isononyl S ⁇ Isononyl oleate C8, G10, C1
- NOACK evaporation% 18 1 8 18 18 18 18 18 18 18 Engine motoring friction 700 rpm, 100 ° C% 0 0 +1.0 +1.3 0 (reference) 0 -1.0 Test (friction torque reduction rate) 3500 rpm, 60 ° C% +1.5 +1.5 +1.5 +1.8 0 (base) +0.2 +1.3
- compositions of Examples 3 and 4 were different from the composition of Comparative Example 1 in the fluid lubrication region of high engine speed and low oil temperature, as well as the boundary lubrication region of low engine speed and high oil temperature. It can be seen that the friction torque reduction rate is further excellent in the range.
- the composition of Comparative Example 2 using an ester base oil that does not satisfy the requirements of the present invention was inferior in the friction torque reduction rate in the fluid lubrication region to the composition of Comparative Example 3 as compared with the composition according to the present invention. It can be seen that the material has the same friction reduction rate in the fluid lubrication region as the composition according to the present invention, but the friction reduction ratio in the boundary lubrication region is negative (increased friction).
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003277523A JP2005041998A (ja) | 2003-07-22 | 2003-07-22 | 内燃機関用潤滑油組成物 |
JP2003-277523 | 2003-07-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005007787A1 true WO2005007787A1 (ja) | 2005-01-27 |
Family
ID=34074643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/007340 WO2005007787A1 (ja) | 2003-07-22 | 2004-05-21 | 内燃機関用潤滑油組成物 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2005041998A (ja) |
WO (1) | WO2005007787A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1818043B (zh) * | 2004-11-01 | 2011-01-19 | 英菲诺姆国际有限公司 | 润滑油组合物 |
WO2015099907A1 (en) * | 2013-12-23 | 2015-07-02 | Exxonmobil Research And Engineering Company | Low viscosity ester lubricant and method for using |
CN105154179A (zh) * | 2008-02-28 | 2015-12-16 | 日本能源株式会社 | 省燃耗型机油组合物 |
CN114806683A (zh) * | 2022-03-28 | 2022-07-29 | 龙蟠润滑新材料(天津)有限公司 | 船舶上中速筒状活塞柴油机用润滑油组合物及其制备方法 |
CN115340899A (zh) * | 2022-09-15 | 2022-11-15 | 福建黑狮润滑油有限公司 | 一种可自行调节粘度的高性能内燃机油及其制备方法 |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006291142A (ja) * | 2005-04-14 | 2006-10-26 | San Corporation Kk | 潤滑剤組成物 |
JP5027426B2 (ja) * | 2006-02-17 | 2012-09-19 | 昭和シェル石油株式会社 | 潤滑剤組成物 |
US7902131B2 (en) * | 2006-04-26 | 2011-03-08 | R.T. Vanderbilt Company, Inc. | Antioxidant synergist for lubricating compositions |
JP2008024845A (ja) * | 2006-07-21 | 2008-02-07 | Cosmo Sekiyu Lubricants Kk | エンジン油 |
JP5839767B2 (ja) * | 2007-03-30 | 2016-01-06 | Jx日鉱日石エネルギー株式会社 | 潤滑油組成物 |
JP5041885B2 (ja) * | 2007-06-11 | 2012-10-03 | Jx日鉱日石エネルギー株式会社 | 内燃機関摩擦損失低減方法 |
JP5319996B2 (ja) * | 2008-09-16 | 2013-10-16 | 三井化学株式会社 | 低粘度エンジン油組成物 |
JP2010095665A (ja) * | 2008-10-17 | 2010-04-30 | Cosmo Oil Lubricants Co Ltd | エンジン油 |
JP5777238B2 (ja) * | 2008-10-17 | 2015-09-09 | コスモ石油ルブリカンツ株式会社 | エンジン油 |
JP5777237B2 (ja) * | 2008-10-17 | 2015-09-09 | コスモ石油ルブリカンツ株式会社 | エンジン油 |
JP5507933B2 (ja) * | 2009-09-07 | 2014-05-28 | Jx日鉱日石エネルギー株式会社 | エンジン油組成物 |
JP5658066B2 (ja) | 2011-03-23 | 2015-01-21 | 昭和シェル石油株式会社 | 潤滑油組成物 |
JP5801174B2 (ja) | 2011-12-07 | 2015-10-28 | 昭和シェル石油株式会社 | 潤滑油組成物 |
JP6270226B2 (ja) * | 2013-08-16 | 2018-01-31 | Jxtgエネルギー株式会社 | 内燃機関用潤滑油組成物 |
JP6218695B2 (ja) * | 2013-12-16 | 2017-10-25 | 富士フイルム株式会社 | 乗用および商用の四輪自動車の内燃機関用潤滑油組成物 |
US20190309237A1 (en) * | 2016-12-16 | 2019-10-10 | Castrol Limited | Ether-Based Lubricant Compositions, Methods and Uses |
US20230051184A1 (en) * | 2019-12-27 | 2023-02-16 | Idemitsu Kosan Co.,Ltd. | Lubricating oil composition |
CN114106920A (zh) * | 2021-12-08 | 2022-03-01 | 东营市东滨石油技术服务有限公司 | 汽车用润滑油 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05279686A (ja) * | 1992-03-31 | 1993-10-26 | Tonen Corp | 内燃機関用潤滑油組成物 |
JPH0680981A (ja) * | 1992-08-31 | 1994-03-22 | Tonen Corp | 内燃機関用潤滑油組成物 |
JPH10130673A (ja) * | 1996-10-25 | 1998-05-19 | New Japan Chem Co Ltd | 潤滑油基油 |
JP2003119482A (ja) * | 2001-10-10 | 2003-04-23 | New Japan Chem Co Ltd | 潤滑油 |
-
2003
- 2003-07-22 JP JP2003277523A patent/JP2005041998A/ja active Pending
-
2004
- 2004-05-21 WO PCT/JP2004/007340 patent/WO2005007787A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05279686A (ja) * | 1992-03-31 | 1993-10-26 | Tonen Corp | 内燃機関用潤滑油組成物 |
JPH0680981A (ja) * | 1992-08-31 | 1994-03-22 | Tonen Corp | 内燃機関用潤滑油組成物 |
JPH10130673A (ja) * | 1996-10-25 | 1998-05-19 | New Japan Chem Co Ltd | 潤滑油基油 |
JP2003119482A (ja) * | 2001-10-10 | 2003-04-23 | New Japan Chem Co Ltd | 潤滑油 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1818043B (zh) * | 2004-11-01 | 2011-01-19 | 英菲诺姆国际有限公司 | 润滑油组合物 |
CN105154179A (zh) * | 2008-02-28 | 2015-12-16 | 日本能源株式会社 | 省燃耗型机油组合物 |
WO2015099907A1 (en) * | 2013-12-23 | 2015-07-02 | Exxonmobil Research And Engineering Company | Low viscosity ester lubricant and method for using |
US10208269B2 (en) | 2013-12-23 | 2019-02-19 | Exxonmobil Research And Engineering Company | Low viscosity ester lubricant and method for using |
CN114806683A (zh) * | 2022-03-28 | 2022-07-29 | 龙蟠润滑新材料(天津)有限公司 | 船舶上中速筒状活塞柴油机用润滑油组合物及其制备方法 |
CN115340899A (zh) * | 2022-09-15 | 2022-11-15 | 福建黑狮润滑油有限公司 | 一种可自行调节粘度的高性能内燃机油及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2005041998A (ja) | 2005-02-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2005007787A1 (ja) | 内燃機関用潤滑油組成物 | |
JP3841687B2 (ja) | 潤滑油組成物 | |
JP4578115B2 (ja) | 潤滑油組成物 | |
JP6896384B2 (ja) | 潤滑油組成物 | |
WO2012066823A1 (ja) | アルミニウム系材料を備えた摺動部用潤滑油組成物及び潤滑方法 | |
JP5330716B2 (ja) | 潤滑油組成物 | |
WO2020095970A1 (ja) | 潤滑油組成物 | |
JP4663288B2 (ja) | 鉛含有金属材料と接触する潤滑油組成物 | |
JP6730123B2 (ja) | 潤滑油組成物 | |
JP4889179B2 (ja) | 潤滑油組成物 | |
JP2005220197A (ja) | 鉛含有金属材料と接触する潤滑油組成物 | |
WO2004013265A1 (ja) | 潤滑油組成物 | |
WO2004111162A1 (ja) | 内燃機関用潤滑油組成物 | |
JP4303037B2 (ja) | 潤滑油組成物 | |
JP4335587B2 (ja) | 潤滑油組成物 | |
JP4528286B2 (ja) | 潤滑油組成物 | |
JP4486338B2 (ja) | 潤滑油組成物 | |
EP2548939B1 (en) | Lubricant composition | |
JP7454947B2 (ja) | 潤滑油組成物 | |
WO2004013264A1 (ja) | 潤滑油組成物 | |
JP2008266367A (ja) | 潤滑油組成物 | |
JP2004067808A (ja) | 潤滑油組成物 | |
JP4612393B2 (ja) | 鉛含有金属材料に好適な潤滑油組成物 | |
JP7446807B2 (ja) | ギヤ油組成物 | |
JP2004067811A (ja) | 潤滑油組成物 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
122 | Ep: pct application non-entry in european phase |