EP3050945A1 - Schmierölzusammensetzung für ein fahrantriebsgetriebe - Google Patents

Schmierölzusammensetzung für ein fahrantriebsgetriebe Download PDF

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Publication number
EP3050945A1
EP3050945A1 EP14848142.7A EP14848142A EP3050945A1 EP 3050945 A1 EP3050945 A1 EP 3050945A1 EP 14848142 A EP14848142 A EP 14848142A EP 3050945 A1 EP3050945 A1 EP 3050945A1
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EP
European Patent Office
Prior art keywords
lubricating oil
carbon atoms
amine
oil composition
group
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP14848142.7A
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English (en)
French (fr)
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EP3050945A4 (de
Inventor
Hidetoshi Koga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Kosan Co Ltd
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Idemitsu Kosan Co Ltd
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Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Publication of EP3050945A1 publication Critical patent/EP3050945A1/de
Publication of EP3050945A4 publication Critical patent/EP3050945A4/de
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
    • C10M141/10—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic phosphorus-containing compound
    • 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
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/02—Well-defined hydrocarbons
    • C10M105/04—Well-defined hydrocarbons aliphatic
    • 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
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/34—Esters of monocarboxylic acids
    • 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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/68—Esters
    • C10M129/76—Esters containing free hydroxy or carboxyl groups
    • 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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/06—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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M133/10—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to acyclic or cycloaliphatic carbon atoms cycloaliphatic
    • 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
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M133/12—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to a carbon atom of a six-membered aromatic ring
    • 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
    • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
    • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
    • C10M137/04—Phosphate esters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/04—Well-defined cycloaliphatic compounds
    • C10M2203/045—Well-defined cycloaliphatic compounds 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
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • 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
    • C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
    • C10M2207/2815—Esters of (cyclo)aliphatic monocarboxylic 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C10M2215/065—Phenyl-Naphthyl amines
    • 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
    • C10M2215/08—Amides
    • 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
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/223—Five-membered rings containing nitrogen and carbon only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/28—Amides; Imides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/02—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
    • C10M2219/024—Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds of esters, e.g. fats
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/02—Unspecified siloxanes; Silicones
    • 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
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/52—Base number [TBN]
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/045—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for continuous variable transmission [CVT]

Definitions

  • the present invention relates to a lubricating oil composition for traction drive transmission.
  • PTL 1 proposes a lubricating oil composition containing an antioxidant composed of a specified hindered phenol compound.
  • PTL 2 proposes a lubricating oil composition containing an acidic phosphate ester.
  • the lubricating oil composition of PTL 1 may exhibit a good oxidation stability of the lubricating oil composition by the hindered phenol compound; however, the seizure resistance is not studied.
  • the lubricating oil composition of PTL 2 may exhibit a good wear resistance of the lubricating oil composition by the acidic phosphate ester; however, the seizure resistance and the oxidation stability are not studied.
  • the acidic phosphate ester to the lubricating oil composition, for the purpose of suppressing corrosion to be caused due to an increase of acidity, it is required to take balance by adding a base to the lubricating oil composition.
  • a base (monoamine compound) disclosed in PTL 2 to the lubricating oil composition, there was a concern that the acidic phosphate ester reacts with the instant amine to generate precipitation.
  • the lubricating oil composition of PTL 2 is used for machine tools, but any lubricating oil composition for automobile transmission is not described at all.
  • the lubricating oil compositions for traction drive transmission are demanded to have a high traction coefficient.
  • a balance between the traction coefficient and other performances is not studied at all.
  • any lubricating oil composition for traction drive transmission capable of satisfying improvement of oxidation stability, preservation of seizure resistance, prevention of generation of precipitation to be caused due to addition of a base, and inhibition of a lowering of traction coefficient has not been proposed yet.
  • the present invention has been made, and an object thereof is to provide a lubricating oil composition for traction drive transmission capable of improving oxidation stability by allowing a base number to remain, preserving seizure resistance, preventing generation of precipitation to be caused due to addition of a base, and inhibiting a lowering of traction coefficient.
  • the present invention is to provide the following lubricating oil composition for traction drive transmission.
  • a lubricating oil composition for traction drive transmission preparing by blending (A) a base oil, (B) a phosphate ester-based compound, (C) an antioxidant, and (D) an amine represented by the following general formula (I) and/or an amine oxide of the amine:
  • the lubricating oil composition for traction drive transmission of the present invention is capable of preserving seizure resistance while improving oxidation stability by allowing a base number to remain, preventing generation of precipitation to be caused due to addition of a base, and inhibiting a lowering of traction coefficient.
  • the lubricating oil composition for traction drive transmission of the present invention preparing by blending (A) a base oil, (B) a phosphate ester-based compound, (C) an antioxidant, and (D) an amine represented by the general formula (I) and/or an amine oxide of the amine.
  • the composition prescribed as "the lubricating oil composition preparing by blending (A) a base oil, (B) a phosphate ester-based compound, (C) an antioxidant, and (D) an amine represented by the general formula (I) and/or an amine oxide of the amine” includes not only a “composition comprising the (A) to (D) components” but also a “composition comprising, in place of at least one of the (A) to (D) components, a modified material resulting from modification of the at least one of the (A) to (D) components” and a “composition comprising a reaction product resulting from reaction of at least a part of the (A) to (D) components with each other".
  • lubricating oil composition for traction drive transmission of the present invention will be sometimes referred to as “lubricating oil composition”.
  • a mineral oil and/or a synthetic oil is used as the base oil in the lubricating oil composition.
  • mineral oil examples include paraffin-based mineral oils, intermediate-based mineral oils, and naphthene-based mineral oils, all of which are obtained by usual purification methods, such as solvent purification, hydrogenation purification, etc., and the like; and those prepared by isomerizing wax produced through Fischer-Tropsch process (gas-to-liquid waxes) or mineral oil-based wax; and the like.
  • Examples of the synthetic oil include hydrocarbon-based synthetic oils, ether-based synthetic oils, and the like.
  • hydrocarbon-based synthetic oil examples include ⁇ -olefin oligomers or hydrides thereof, such as polybutene, polyisobutylene, a 1-octene oligomer, a 1-decene oligomer, an ethylene-propylene copolymer, etc.; aromatic compounds, such as an alkylbenzene, an alkylnaphthalene, etc.; naphthene ring-containing compounds, such as compounds having one naphthene ring, e.g., cyclopentane, cyclohexane, etc., compounds having two or more naphthene rings, e.g., phychtelite, oleanane, 2,4-dicyclohexyl-2-methylpentane, bicyclo[2.2.1]heptane, a hydride of a dimer of bicyclo[2.2.1]heptane ring compound, octahydrometanonaphthalene,
  • ether-based synthetic oil examples include polyoxyalkylene glycols, polyphenyl ethers, and the like.
  • the base oil only one of the aforementioned mineral oils and/or the aforementioned synthetic oils may be used, or two or more thereof may also be used. Furthermore, at least one mineral oil and at least one synthetic oil may be used in combination.
  • naphthene-based mineral oils or naphthene ring-containing compounds are preferred from the viewpoint of increasing the traction coefficient.
  • naphthene-based synthetic oils are more preferred, and especially, naphthene-based synthetic oils having two or more naphthene rings are still more preferred.
  • bicyclo[2.2.1]heptane and a hydride of a dimer or trimer of bicyclo[2.2.1]heptane ring compound are suitable, with a dimer being especially preferred.
  • bicyclo[2.2.1]heptane ring compound examples include compounds having a bicyclo[2.2.1]heptane ring, on which at least one alkyl group having 1 to 3 carbon atoms may be substituted, and having a molecular weight of 200 to 500.
  • dimer of the instant compound examples include endo-2-methyl-exo-3-methyl-exo-2-[(exo-3-methylbicyclo[2.2.1]hept-exo-2-yl)methyl]bicyclo[2.2.1]heptane, endo-2-methyl-exo-3-methyl-exo-2- [(exo-2-methylbicyclo[2.2.1]hept-exo-3-yl)methyl]bicyclo[2.2.1]heptane, endo-2-methyl-exo-3-methyl-exo-2-[(endo-3-methylbicyclo[2.2.1]hept-endo-2-yl)methyl]bicyclo[2.2.1]heptane, endo-2-methyl-exo-3-methyl-exo-2-[(endo-2-methylbicyclo[2.2.1]hept-endo-3-yl)methyl]bicyclo[2.2.1]heptane, and the like.
  • trimer of the instant compound examples include 3-methyl-2-[(3-methylbicyclo[2.2.1]hept-2-yl)methyl]-2-[(2,3-dimethylbicyclo[2.2.1]hept-2-yl)methyl]bicyclo[2.2.1]heptane, 2-[(bicyclo[2.2.1]hept-2-yl)methyl]-2-[(2-methylbicyclo[2.2.1]hept-2-yl)methyl]bicyclo[2.2.1]heptane, 2-[(bicyclo[2.2.1]hept-2-yl)ethyl]-2-[(2-ethylbicyclo[2.2.1]hept-2-yl)ethyl]bicyclo[2.2.1]heptane, and the like.
  • a blending amount of the base oil that is the (A) component is preferably 80 to 99% by mass, and more preferably 90 to 95% by mass relative to the total amount of the lubricating oil composition from the viewpoint of keeping a high traction coefficient while ensuring the blending proportions of other components.
  • a phosphate ester-based compound is used as the B component.
  • the phosphate ester-based compound has a role of preserving the seizure resistance.
  • phosphate ester-based compound examples include phosphate esters, such as orthophosphate esters, acidic phosphate esters, phosphite esters, etc. At least one of these phosphate esters may be used. Among these phosphate esters, phosphite esters are suitable, but they may be properly selected according to the purpose.
  • orthophosphate ester for example, those represented by the following general formula (II) are useful.
  • each of R 7 to R 9 represents an alkyl group having 4 to 24 carbon atoms, an alkenyl group having 4 to 24 carbon atoms, or a hetero atom-containing group having 4 to 24 carbon atoms which contains an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom in the aforementioned alkyl group or alkenyl group.
  • alkyl group and the alkenyl group represented by R 7 to R 9 may be linear, branched, or cyclic, they are preferably linear. Furthermore, the alkyl group and the alkenyl group represented by R 7 to R 9 have preferably 6 to 20 carbon atoms, and more preferably 7 carbon atoms.
  • R 7 to R 9 are each a hetero atom-containing group
  • the number of hetero atoms is preferably 1 to 4, and the hetero atom is preferably a sulfur atom.
  • Examples of the alkyl group represented by R 7 to R 9 include an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an eicosyl group, a heneicosyl group, a docosyl group, a tricosyl group, and a tetracosyl group. These may be linear, branched, or cyclic.
  • alkenyl group examples include an octenyl group, a nonenyl group, a decenyl group, an undecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group, an octadecenyl group, a nonadecenyl group, an eicosenyl group, a heneicosenyl group, a docosenyl group, a tricosenyl group, and a tetracosenyl group. These may be linear, branched, or cyclic, and a position of the double bond is arbitrary.
  • acidic phosphate ester for example, those represented by the following general formula (III) are useful.
  • R 10 represents a hydrogen atom, an alkyl group having 4 to 24 carbon atoms, an alkenyl group having 4 to 24 carbon atoms, or a hetero atom-containing group having 4 to 24 carbon atoms which contains an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom in the aforementioned alkyl group or alkenyl group.
  • an alkyl group, an alkenyl group, or a hetero atom-containing group is preferable.
  • R 11 represents an alkyl group having 4 to 24 carbon atoms, an alkenyl group having 4 to 24 carbon atoms, or a hetero atom-containing group having 4 to 24 carbon atoms and containing an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom in the aforementioned alkyl group or alkenyl group.
  • alkyl group and the alkenyl group represented by R 10 and R 11 may be linear, branched, or cyclic, they are preferably linear. Furthermore, the alkyl group and the alkenyl group represented by R 10 and R 11 have preferably 6 to 20 carbon atoms.
  • alkyl group and the alkenyl group represented by R 10 and R 11 are the same as those in R 7 to R 9 .
  • the number of hetero atoms is preferably 1 to 4, and the hetero atom is preferably a sulfur atom.
  • phosphite ester for example, those represented by the following general formula (IV) are useful.
  • R 12 represents a hydrogen atom, an alkyl group having 4 to 24 carbon atoms, an alkenyl group having 4 to 24 carbon atoms, or a hetero atom-containing group having 4 to 24 carbon atoms and containing an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom in the aforementioned alkyl group or alkenyl group.
  • an alkyl group, an alkenyl group, or a hetero atom-containing group is preferable.
  • R 13 represents an alkyl group having 4 to 24 carbon atoms, an alkenyl group having 4 to 24 carbon atoms, or a hetero atom-containing group having 4 to 24 carbon atoms and containing an atom selected from an oxygen atom, a nitrogen atom, and a sulfur atom in the aforementioned alkyl group or alkenyl group.
  • alkyl group and the alkenyl group represented by R 12 and R 13 may be linear, branched, or cyclic, they are preferably linear. Furthermore, the alkyl group and the alkenyl group represented by R 12 and R 13 have preferably 6 to 20 carbon atoms, and more preferably 6 to 12 carbon atoms.
  • the number of hetero atoms is preferably 1 to 4, and the hetero atom is preferably a sulfur atom.
  • alkyl group and the alkenyl group represented by R 12 and R 13 are the same as those in R 7 to R 9 .
  • a blending amount of the phosphate ester-based compound as the B component is preferably 0.05 to 10% by mass, and more preferably 0.5 to 8% by mass relative to the total amount of the lubricating oil composition from the viewpoints of improving the seizure resistance and inhibiting a lowering of the traction coefficient.
  • an antioxidant is used as the C component.
  • the antioxidant include amine-based antioxidants, phenol-based antioxidants, and sulfur-based antioxidants.
  • amine-based antioxidant examples include dialkyldiphenylamines (the carbon number of the alkyl group is 1 to 20), such as 4,4'-dibutyldiphenylamine, 4,4'-dioctyldiphenylamine, 4,4'-dinonyldiphenylamine, etc and naphthylamines, such as phenyl- ⁇ -naphthylamine, octylphenyl- ⁇ -naphthylamine, nonylphenyl- ⁇ -naphthylamine, etc.
  • dialkyldiphenylamines (the carbon number of the alkyl group is 1 to 20)
  • 4,4'-dibutyldiphenylamine 4,4'-dioctyldiphenylamine, 4,4'-dinonyldiphenylamine, etc
  • naphthylamines such as phenyl- ⁇ -naphthylamine, octy
  • phenol-based antioxidant examples include monophenol-based antioxidants, such as 2,6-di-tert-butyl-4-methylphenol, 2.6-di-tert-butyl-4-ethylphenol, etc.; and diphenol-based antioxidants, such as 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,2'-methylenebis(4-ethyl-6-tert-butylphenol), etc.
  • sulfur-based antioxidant examples include phenothiazine, pentaerythritol-tetrakis-(3-laurylthiopropionate), bis(3,5-tert-butyl-4-hydroxybenzyl)sulfide, thiodiethylenebis(3-(3,5-di-tert-butyl-4-hydroxyphenyl))propionate, 2,6-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazine-2-methylamino)phenol, and the like.
  • the aforementioned antioxidants may be used alone, or may be used in combination of two or more thereof.
  • a combination of the phenol-based antioxidant with the amine-based antioxidant or sulfur-based antioxidant is preferably used, and a combination of the phenol-based antioxidant with the amine-based antioxidant is optimum.
  • a blending amount of the antioxidant as the C component is preferably 0.1 to 1.6% by mass, and more preferably 0.5 to 1% by mass relative to the total amount of the lubricating oil composition from the viewpoints of improving the oxidation stability and inhibiting a lowering of the traction coefficient.
  • an amine represented by the general formula (I) and/or an amine oxide of the instant amine (hereinafter sometimes referred to as "amine of the D component") is used as the D component.
  • amine of the D component an amine represented by the general formula (I) and/or an amine oxide of the instant amine
  • Either of the amine represented by the general formula (I) and the amine oxide of the instant amine may bring the effects of the present invention, but the amine represented by the general formula (I) is preferable from the viewpoints that it is likely to allow the base number to remain and that it is excellent in maintenance of the oxidation stability.
  • each of R 1 and R 2 independently represents a linear, branched, or cyclic alkyl group having 1 to 26 carbon atoms, a linear, branched, or cyclic alkenyl group having 1 to 26 carbon atoms, (R 4 -O) m -H, or (R 5 -O) n1 -(R 6 -O) n2 -H, and R 1 and R 2 may be the same as or different from each other; each of R 4 to R 6 independently represents an alkylene group having 2 to 3 carbon atoms; each of m, n1, and n2 independently represents a number of 2 to 25; and R 3 represents a substituted or unsubstituted, linear, branched, or cyclic alkyl group having 1 to 26 carbon atoms, or a substituted or unsubstituted, linear, branched, or cyclic alkenyl group having 1 to 26 carbon atoms.
  • the amine as the D component plays a role of not only neutralizing the acidity which has been increased by the addition of the phosphate ester-based compound as the B component, to inhibit corrosion of the metal but also inhibiting oxidation of the lubricating oil composition, to improve the oxidation stability.
  • a metal-based detergent, a primary amine, and a second amine might be thought.
  • the metal-based detergent is excessively high in reactivity, so that the effect for preserving the seizure resistance of the phosphate ester-based compound as the B component is impaired.
  • the primary amine and the secondary amine there is a concern that such an amine reacts with the phosphate ester-based compound to generate precipitation.
  • each of R 1 to R 3 is preferably an alkyl group, and more preferably an unsubstituted linear alkyl group from the viewpoint of improving the stability.
  • the sum total of carbon number of R 1 to R 3 is preferably 10 to 40, more preferably 11 to 23, and still more preferably 12 to 22.
  • the amine as the D component may be allowed to remain as an effective component for a long period of time, and when the sum total of carbon number is 40 or less, the addition amount of the amine as the D component may be suppressed while ensuring the basic effective component in a certain proportion.
  • R 1 and R 2 are a methyl group, and it is more preferred that both of R 1 and R 2 are a methyl group.
  • R 3 is preferably an unsubstituted linear alkyl group having 8 to 22 carbon atoms, and more preferably an unsubstituted linear alkyl group having 10 to 20 carbon atoms.
  • the amine as the D component may be used alone, or may be used in admixture of two or more thereof.
  • the amine as the D component from the viewpoint of inhibiting a lowering of the traction coefficient, its base number is preferably one at which the blending amount of the D component becomes small, and the base number is preferably 50 mgKOH/g or more, and more preferably 100 mgKOH/g or more. It is to be noted that the base number as referred to in the present invention refers to a value measured by the hydrochloric acid method in conformity with JIS K2501.
  • a blending amount of the amine as the D component is preferably 0.05 to 4% by mass, more preferably 0.1 to 0.8% by mass, and still more preferably 0.15 to 0.5% by mass relative to the total amount of the lubricating oil composition from the viewpoints of appropriate neutralization and inhibition of a lowering of the traction coefficient.
  • the phosphate ester-based compound as the B component and the amine as the D component are preferably blended in a mass ratio of 35/1 to 2/1, and more preferably blended in a mass ratio of 20/1 to 3/1.
  • a mass ratio 35/1 to 2/1
  • a mass ratio of 20/1 to 3/1 By blending these components in such a mass ratio, it is possible to improve a balance between the seizure resistance and the inhibition of corrosion favorable.
  • a lubricating oil additive may be further blended as an E component in the composition of the A to D components.
  • lubricating oil additive examples include a viscosity index improver, a friction modifier, other lubricating oil additives, and the like. It is preferred to blend one or two or more lubricating oil additives selected from the foregoing additives.
  • the friction modifier examples include partial ester compounds obtained through reaction between a fatty acid and an aliphatic polyhydric alcohol.
  • the fatty acid is preferably a fatty acid having a linear or branched hydrocarbon group having 6 to 30 carbon atoms, and the carbon number of the hydrocarbon group is more preferably 8 to 24, and especially preferably 10 to 20.
  • fatty acid examples include saturated fatty acids, such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, etc.; and unsaturated fatty acids, such as myristoleic acid, palmitoleic acid, oleic acid, linoleic acid, etc., with oleic acid being preferred.
  • saturated fatty acids such as caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid, lignoceric acid, etc.
  • unsaturated fatty acids such as myristoleic acid, palmitoleic acid, oleic acid, linoleic acid, etc., with oleic acid being preferred.
  • the aforementioned aliphatic polyhydric alcohol is an alcohol having a valence of 2 to 6, and examples thereof include ethylene glycol, glycerin, trimethylolpropane, pentaerythritol, sorbitol, sorbitan, and the like, with sorbitan being preferred.
  • These partial ester compounds may be used alone, or may be used in combination of two thereof.
  • a fatty acid saturated monoamine and an unsaturated monoamine each having about 10 to 20 carbon atoms may also be suitably used as the friction modifier.
  • Examples of other lubricating oil additives include an antifoaming agent, a metal deactivator, an ultraviolet absorber, a rust-preventive agent, a pour-point depressant, and the like.
  • Examples of the antifoaming agent include a silicone oil, a fluorinated silicone oil, and the like
  • examples of the metal deactivator include copper deactivators, such as an N-[N,N'-dialkylaminomethyl] triazole (the carbon number of the alkyl group is 3 to 12), etc., and the like.
  • a blending amount of the lubricating oil additive varies with a performance to be added, and hence, it may not be unequivocally defined. However, it is preferably 3% by mass or less, and more preferably 0.1 to 1% by mass relative to the total amount of the lubricating oil composition.
  • the lubricating oil composition does not substantially contain a primary or secondary aliphatic amine.
  • What the lubricating oil composition does not substantially contain a primary or secondary aliphatic amine means that the amount of the primary or secondary aliphatic amine is 0.1% by mass or less, preferably 0.01% by mass or less, and more preferably 0% by mass on the basis of the total amount of the lubricating oil composition. It is to be noted that even a primary or secondary amine may be added within the range where the effects of the present invention are not impaired. For example, so long as a primary or secondary amine having more than 20 carbon atoms is concerned, it tends to hardly generate a precipitate while it depends on a kind of the base oil.
  • the traction drive transmission of the present invention is one using the aforementioned lubricating oil composition for traction drive transmission of the present invention as a lubricating oil composition contained in a traction drive transmission.
  • a main body of the traction drive transmission those which are conventionally known may be used.
  • the lubricating oil composition contained in the traction drive transmission the aforementioned lubricating oil composition for traction drive transmission of the present invention is used.
  • the traction drive transmission of the present invention is excellent in remaining properties of the base number, and hence, it has thorough oxidation stability, preserves seizure resistance, and is free from an obstruction by a precipitate, high in a traction coefficient, and excellent in power transmission.
  • a base number of a lubricating oil composition (new oil) was measured the hydrochloric acid method in conformity with JIS K2501.
  • a base number of a lubricating oil composition which had been subjected to an oxidation stability test under conditions at 150°C for 240 hours in conformity with CEC L-48-A-00[B] was measured by the hydrochloric acid method in conformity with JIS K2501.
  • the measurement of the traction coefficient at 100°C was performed by using a two-cylinder friction tester. That is, the traction coefficient was determined with two cylinders each having the same size and coming into contact with each other (which had a diameter of 40 mm and a thickness of 20 mm and which were composed of a drum-shaped driven cylinder with a curvature radius of 20 mm and a flat driving cylinder without crowning) by rotating either one of the cylinders at a constant velocity while continuously varying a rotational velocity of the other, applying a load of 147.1 N to the contact portion of the both cylinders by a weight, and measuring a tangent force generating between the both cylinders, that is, the objective traction force.
  • the cylinders were made of chromium molybdenum steel SCM420 and mirror-finished, an average circumferential velocity was 6.8 m/s, and a maximum hertz contact pressure was 1.24 GPa.
  • the traction coefficient was measured under conditions at a slip ratio of 5%.
  • a decrease ratio of the traction coefficient of each of the Examples and Comparative Examples relative to the traction coefficient of Comparative Example 1 was calculated based on the traction coefficients thus obtained above.
  • Phosphate ester-based compound (phosphorus content: 920 ppm, total acid number: 1.95 mgKOH/g)
  • the lubricating oil compositions of the Examples could allow the base number to thoroughly remain even after the long-term use under high-temperature circumstances. This matter means that the base always exists even in the use under severe conditions, and the oxidation stability is favorable.
  • the lubricating oil compositions of the Examples could preserve the seizure resistance without causing seizure even at a load of 13,340 N and did not generate precipitation by the addition of the base.
  • the lubricating oil compositions of the Examples were less in a lowering of the traction coefficient relative to Comparative Example 1 as a reference and could inhibit a lowering of the traction coefficient.
  • the lubricating oil compositions of Comparative Examples 1 to 7, 9 to 10, and 12 to 15 could not allow the base number to thoroughly remain after the long-term use under high-temperature circumstances. This matter means that the amount of the base is not sufficient in the use under severe conditions, and the oxidation stability is not satisfactory.
  • Comparative Examples 7 and 8 in view of the fact that the primary amine or secondary amine was used, the precipitation was generated.
  • Comparative Examples 9 to 11 in view of the fact that the metal-based detergent dispersant was used, the effect for preserving the seizure resistance of the phosphate ester-based compound as the B component was impaired.
  • the present invention it is possible to provide a lubricating oil composition capable of improving oxidation stability by allowing a base number to remain, preserving seizure resistance, preventing generation of precipitation to be caused due to addition of a base, and inhibiting a lowering of traction coefficient.
  • the lubricating oil composition of the present invention is able to be effectively utilized as a lubricating oil composition for traction drive transmission (T-CVT).

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