EP1930400B1 - Lubricant composition - Google Patents

Lubricant composition Download PDF

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Publication number
EP1930400B1
EP1930400B1 EP06810740A EP06810740A EP1930400B1 EP 1930400 B1 EP1930400 B1 EP 1930400B1 EP 06810740 A EP06810740 A EP 06810740A EP 06810740 A EP06810740 A EP 06810740A EP 1930400 B1 EP1930400 B1 EP 1930400B1
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EP
European Patent Office
Prior art keywords
acid
composition
grease composition
mass
base oil
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.)
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Application number
EP06810740A
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German (de)
English (en)
French (fr)
Japanese (ja)
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EP1930400A1 (en
EP1930400A4 (en
Inventor
Yukitoshi Fujinami
Hideto Kamimura
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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Publication of EP1930400A1 publication Critical patent/EP1930400A1/en
Publication of EP1930400A4 publication Critical patent/EP1930400A4/en
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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
    • 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
    • C10M141/06—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 nitrogen-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
    • 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
    • C10M169/06—Mixtures of thickeners 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
    • C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
    • C10M2203/102—Aliphatic fractions
    • C10M2203/1025—Aliphatic fractions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M2207/02—Hydroxy compounds
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two 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
    • 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/106—Carboxylix acids; Neutral salts thereof used as thickening agents
    • 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
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
    • C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
    • 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
    • C10M2207/142—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings polycarboxylic
    • C10M2207/1426—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings polycarboxylic used as thickening agent
    • 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
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M2215/006—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions used as thickening agents
    • 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
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening 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
    • C10M2215/22—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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/046—Overbasedsulfonic acid salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/04—Molecular weight; Molecular weight distribution
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • 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
    • C10N2030/08—Resistance to extreme temperature
    • 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
    • C10N2030/74—Noack Volatility
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • 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
    • C10N2040/02—Bearings
    • 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
    • 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
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy

Definitions

  • the present invention relates to a lubricating composition and, more particularly, to a high temperature grease composition used for the lubrication of various machines and apparatuses such as automobiles, electric appliances, construction machines and machine tools as well as bearings and to a lubricating oil composition used for a long period of time under high temperatures in oil hydraulic, compression and vacuum pumps, bearings, gears, etc.
  • a lubricating composition is widely used in various machines such as automobiles, electric appliances, construction machines and machine tools. Such machines have been demanded year by year for meeting requirements of compact size, high output, light weight and simple maintenance. As a consequence, lubricating conditions of lubricating compositions become severe more and more.
  • To make a machine compact in size and high in output is to reduce the dimension thereof when the output thereof is the same. When the dimension is reduced, the heat energy discharged from surfaces of the machine is reduced to cause an increase of the temperature of a lubrication section thereof.
  • a material that has low heat conductivity such as a non-metal. This results in a further increase of the temperature.
  • Simple maintenance has the same meaning as extension of service life. To extend the oxidation life, the lubrication characteristics must be kept for a long time. In this circumstance, there is a demand for a lubricating composition having a long oxidation life so that the lubricating characteristics thereof can be maintained for a long period of time, particularly a high temperature grease composition having a high dropping point and a high temperature lubricating oil composition.
  • Patent Document 1 discloses a grease containing a metal deactivator for plastics and a lithium salt of a hydroxyfatty acid, a dilithium salt of an aliphatic dicarboxylic acid or a lithium salt of an aliphatic monocarboxylic acid.
  • Patent Document 2 discloses a grease composition including a base oil of a synthetic lube oil, a thickening agent of a urea compound, (a) an aromatic amine compound and (b) a hindered ester compound and further containing (c) at least one compound selected from phthalimide compounds and phosphoric ester compounds having an aromatic ring.
  • Patent Document 3 discloses a grease composition containing a base oil, a thickening agent, an antioxidant and an aromatic dibasic acid or a metal salt of an aromatic dibasic acid (excluding lithium terephthalate).
  • Patent Document 4 discloses a grease composition obtained by compounding a thickening agent composed of a C 12 to C 24 fatty acid having at least one hydroxyl group and a lithium salt of a C 2 to C 12 aliphatic dicarboxylic acid into a base oil which contains, as essential ingredients, a mineral oil having a kinematic viscosity at 40°C of 300 to 500 mm 2 /s and a synthetic hydrocarbon oil having a kinematic viscosity at 40°C of 20 to 300 mm 2 /s and which has a kinematic viscosity at 40°C of 60 to 200 mm 2 /s.
  • Patent Document 5 discloses a lubricating composition for rolling bearings which contains (a) a urethane prepolymer having an isocyanate group content of 6 to 10 % by weight, (b) a grease selected from a metal soap type grease and a non-metal soap type grease, and (c) an amine curing agent, and which has a hardness after curing of 60 to 85 in International Rubber Hardness Degree (IRHD).
  • IRHD International Rubber Hardness Degree
  • Patent Document 6 proposes the use of a styrenized diphenylamine, particularly 4,4'-bis( ⁇ -methylbenzyl)diphenylamine, as an antioxidant for a lubricating composition.
  • Patent Document 6 does not at all consider the conjoint use thereof with other antioxidants.
  • Patent Document 7 proposes an antiwear bearing oil composition in which an alkylated diphenylamine or a hindered phenol compound is incorporated as an antioxidant into a base oil together with a nonionic surfactant and an anti-wear agent for the purpose of improving anti-wearing property and stability against oxidation.
  • Patent Document 7 does not at all suggest the conjoint use of an amine-type antioxidant and a phenol compound for the purpose of improving the service life at high temperatures.
  • no sufficient studies have been made to develop an advantageous combination of an amine-type antioxidant with a phenol-type antioxidant in order to improve the effect of the prevention of deterioration by oxidation of the lubricating oil at high temperatures.
  • the present invention has been made for solving the above-mentioned problems and has as its object the provision of a lubricating composition, particularly a grease composition and a lubricating oil composition, which are hardly decomposed or volatilized even at high temperatures and have a long oxidation life so that the lubricating characteristics thereof can be maintained for a long period of time.
  • the present inventors have made an earnest study with a view toward accomplishing the above objects and have found that the objects can be fulfilled by compounding an aralkylated diphenylamine and a specific phenol compound into a base oil.
  • the present invention provides a lubricating grease composition having a dropping point of not less than 230°C and which comprises 10 to 30% by mass of a thickening agent, 0.01 to 10 % by mass of an aralkylated diphenylamine0.01 to 10 % by mass of octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and a base oil having a flash point of not lower than 180°C, as measured in accordance with JIS K2265, Cleveland open cup method; the relative proportions of the components being based on the grease composition; the aralkylated diphenylamine being represented by the following chemical formula (1): wherein R 1 and R 4 each independently represent a C 0 to C 24 alkyl group and R 2 and R 3 each independently represent a C 1 to C 5 alkylene group.
  • a base oil used in the lubricating composition of the present invention is not specifically limited. Any customarily employed mineral oil or synthetic oil may be used.
  • Examples of usable base oil include mineral oils such as paraffinic mineral oils, intermediate base mineral oils and naphthenic mineral oils; refined mineral oils obtained by processing the above mineral oils by solvent deasphalting, solvent extraction, hydrocracking, solvent dewaxing, hydrodewaxing or hydrorefining; mineral oils produced by isomerization of waxes; hydrocarbon synthetic oils such as poly- ⁇ -olefins; fats and oils; synthetic esters; and synthetic ethers.
  • the refined mineral oils and synthetic oils are preferred.
  • base oils having a flash point of 180°C or higher are preferred.
  • a base oil having a flash point of 180°C or higher can be suitably used for a high temperature grease composition.
  • the base oil have a % C A of 1 or less, more preferably 0.5 or less.
  • C A represents an aromatic content as determined by the n-d-M ring analysis method (ASTM D 3238).
  • the term "% C A of a base oil” is intended to refer to C A of the base oil in terms of % by mass. It is further preferred that the base oil have a sulfur content of 20 ppm or less, more preferably 10 ppm or less.
  • poly- ⁇ -olefin used as the base oil in the present invention there may be used various kinds of ⁇ -olefin polymers.
  • ⁇ -olefin polymers Generally used are polymers of a C 6 to C 16 ⁇ -olefin having a lubrication viscosity. From the standpoint of thermal stability, sealing property and lubricity, polymers of 1-dodecene, 1-decene or 1-octene are preferred.
  • hydrogen-treated poly- ⁇ -olefins are particularly suitably used. These poly- ⁇ -olefns may be used singly or as a mixture of two or more thereof.
  • the kinematic viscosity of the base oil is not specifically restricted.
  • the kinematic viscosity of the base oil is generally suitably selected from a range of 2 mm 2 /s to 600 mm 2 /s at 40°C, more preferably 10 mm 2 /s to 400 mm 2 /s.
  • R 1 and R 4 each independently represent a C 0 to C 24 alkyl group
  • R 2 and R 3 each independently represent a C 1 to C 5 alkylene group, more preferably a C 1 to C 3 alkylene group.
  • C 0 means that the corresponding substituent R 1 or R 4 is not present.
  • Specific examples of the aralkylated diphenylamine include 4,4'-bis( ⁇ , ⁇ -dimethylbenzyl)diphenylamine, 4,4'-bisbenzyldiphenylamine, 4,4'-diphenethyldiphenylamine and 4,4'-bis( ⁇ -methylbenzyl)diphenylamine.
  • 4,4'-bis( ⁇ , ⁇ -dimethylbenzyl)diphenylamine is preferred.
  • the aralkylated diphenylamine is used in an amount of 0.01 to 10 % by mass, more preferably 0.1 to 5 % by mass, particularly preferably 0.1 to 2 % by mass, based on the lubricating composition.
  • the amount is 0.01 % by mass or greater, deterioration by oxidation can be effectively prevented.
  • An amount of 10 % by mass or less is economically advantageous.
  • Octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (molecular weight: 520.89) improves the effect of the prevention of deterioration by oxidation.
  • This phenol compound is used in an amount of 0.01 to 10 % by mass, more preferably 0.1 to 5 % by mass, particularly preferably 0.1 to 3 % by mass, based on the lubricating composition.
  • the amount is 0.01 % by mass or more, the effect of the prevention of deterioration by oxidation is obtainable.
  • An amount of 10 % by mass or less is advantageous from the standpoint of economy.
  • the thickening agent used in the present invention is not specifically restricted.
  • a soap thickening agent or a non-soap thickening agent may be used.
  • Preferably used is a thickening agent which can provide a grease composition having a dropping point of 230°C or higher.
  • a possibility of causing problems in relation to lubrication such as softening at high temperatures and resulting leakage or baking can be suppressed.
  • the soap thickening agent there may be mentioned a metal soap obtained by saponifying a carboxylic acid or its ester with a metal hydroxide such as an alkali metal hydroxide or an alkaline earth metal hydroxide.
  • Examples of the metal include sodium, calcium, lithium and aluminum.
  • Examples of the carboxylic acid include fats and oils, crude fatty acids obtained by hydrolyzing fats and oils and removing glycerin therefrom, monocarboxylic acids such as stearic acid, monohydroxycarboxylic acids such as 12-hydroxystearic acid, dibasic carboxylic acids such as azelaic acid, and aromatic carboxylic acids such as terephthalic acid, salicylic acid and benzoic acid.
  • These soap thickening agents may be used singly or in combination.
  • a preferred example of the soap thickening agent is a lithium soap using 12-hydroxystearic acid.
  • the soap thickening agent As another type of the soap thickening agent, there may be mentioned various complex soaps.
  • the complex soap include a lithium complex soap, an aluminum complex soap and a calcium complex soap.
  • the lithium complex soap may be obtained by reacting a fatty acid, such as stearic acid, oleic acid or palmitic acid, and/or a C 12 to C 24 hydroxyfatty acid having at least one hydroxyl group with a lithium compound, such as lithium hydroxide, together with an aromatic carboxylic acid and/or C 2 to C 12 (more preferably C 4 to C 9 ) aliphatic dicarboxylic acid.
  • a lithium complex soap is a more preferable thickening agent because of its superior heat resistance as compared with a lithium soap.
  • C 12 to C 24 hydroxyfatty acid 12-hydroxystearic acid is most preferred, though any other hydroxyfatty acid may be used.
  • Such other hydroxyfatty acids may be, for example, 12-hydroxylauric acid and 16-hydroxypalmitic acid.
  • aromatic carboxylic acid there may be mentioned benzoic acid, o-phthalic acid, m-phthalic acid, terephthalic acid, trimellitic acid, pyromellitic acid, salicylic acid and p-hydroxybenzoic acid.
  • azelaic acid is most preferred, though any other aliphatic dicarboxylic acid may be used.
  • Such other aliphatic dicarboxylic acid may be, for example, sebacic acid, oxalic acid, malonic acid, succinic acid, adipic acid, pimelic acid, suberic acid, undecanedicarboxylic acid and dodecanedicarboxylic acid. It is preferred that the aromatic carboxylic acid and/or C 2 to C 12 aliphatic dicarboxylic acid be present in an amount of 20 to 90 % by mass based on a total mass of the fatty acid and/or C 12 to C 24 hydroxyfatty acid having at least one hydroxyl group and the aromatic carboxylic acid and/or C 2 to C 12 aliphatic dicarboxylic acid. This is because a thickening agent having good thermal stability may be obtained and a grease composition having a long service life at high temperatures may be advantageously obtainable when the amount is within the range of 20 to 90 % by mass.
  • a urea compound or bentonite treated with an organic compound may be used.
  • the urea compound used as the thickening agent there may be mentioned a diurea compound, a triurea compound, a tetraurea compound and a urea-urethane compound. Because the urea compound has excellent heat resistance and water resistance and is particularly excellent in stability at high temperatures, it is suitably used in a high temperature environment.
  • the diurea compound there may be mentioned, for example, a compound represented by the formula R 8 NHCONHR 9 NHCONHR 8 (wherein R 8 represents a straight chained or branched, saturated or unsaturated C 6 to C 24 alkyl group and R 9 represents a divalent C 6 to C 15 aromatic hydrocarbon group).
  • the typical diurea compound may be obtained by reaction of a diisocyanate with a monoamine.
  • the diisocyanate may be, for example, diphenylmethane diiocyanate, phenylene diisocyanate, diphenyl diisocyanate, phenyl diisocyanate or tolylene diisocyanate.
  • the monoamine may be, for example, octylamine, dodecylamine, hexadecylamine, cyclohexylamine, aniline, toluidine, octadecylamine or oleylamine.
  • Conventionally known urea thickening agents may also be suitably used.
  • the complex soaps and urea compounds are preferred.
  • the complex soaps and urea compounds may be used singly or in combination of two or more thereof.
  • the compounding amount of the thickening agent in the grease composition is 10 to 30 % by mass, more preferably 10 to 20 % by mass, based on the grease composition.
  • the thickening agent used in the grease composition of the present invention serves to impart a desired consistency thereto. When the amount of the thickening agent is excessively small, a desired consistency is not obtainable. When the compounding amount is excessively large, the lubricity of the grease is reduced.
  • the grease composition of the present invention contains a base oil having a flash point of 180°C or higher, an aralkylated diphenylamine, the above phenol compound and, additionally, a thickening agent for reasons of maintaining the lubricating characteristics at high temperatures for a long period of time.
  • the grease composition and lubricating oil composition according to the present invention may optionally contain an additive or additives such as an anti-corrosive agent, an extreme pressure agent, a metal deactivator, a metallic detergent, a non-metallic detergent, an antifoaming agent, a viscosity increasing agent, a colorant and a water repellent agent.
  • an additive or additives such as an anti-corrosive agent, an extreme pressure agent, a metal deactivator, a metallic detergent, a non-metallic detergent, an antifoaming agent, a viscosity increasing agent, a colorant and a water repellent agent.
  • an additive or additives such as an anti-corrosive agent, an extreme pressure agent, a metal deactivator, a metallic detergent, a non-metallic detergent, an antifoaming agent, a viscosity increasing agent, a colorant and a water repellent agent.
  • the anti-corrosive agent there may be mentioned a metallic sulfonate and
  • a lubricating composition particularly a grease composition and a lubricating oil composition, which are hardly decomposed or volatilized even at high temperatures and which have a long oxidation life so that the lubricating characteristics thereof can be maintained for a long period of time.
  • Flash point was measured in accordance with JIS K2265 (Cleveland open cup method).
  • the oxidation life is a time period taken for the ratio (I 720 )/(I 1710 ) of the transmittance at 720 cm -1 to the transmittance at 1710cm -1 to be 1.2 or more.
  • Oil separation was measured in accordance with JIS K2220, but using a measuring temperature of 180°C.
  • a tester (ASTM D3336) was continuously operated at 10,000 rpm and at 180°C.
  • the bearing life is a time period (in hours) for the tester to become no longer operable due to "burning".
  • a sample (1 g) was allowed to stand in the vessel at 170°C for 48 hours.
  • the amount of the oil remaining in the vessel was then measured, from which an oil remaining percent was calculated.
  • air was continuously fed to the vessel at a flow rate of 10 L/hr. The greater the oil remaining percent, the less likely the thermal decomposition is to occur, i.e. the better is the stability at high temperatures.
  • the lubricating oil was allowed to stand and cool at room temperature.
  • the vessel was then slanted to determine the fluidity with naked eyes.
  • the grease compositions of Example. 1 and Comparative Examples 3, 6 and 8 were each measured for the above-described bearing life.
  • the bearing life was found to be 530 in the case of the grease composition of Example 1, 410 in the case of the grease composition of Comparative Example 8, 130 in the case of the grease composition of Comparative Example 3, and 145 in the case of the grease composition of Comparative Example 6.
  • the grease composition of the present invention has a long bearing life.
  • the lubricating composition of the present invention which has long oxidation life and can maintain its lubricating characteristics for a long time even when exposed to high temperatures, is suitably used, as a high temperature lubricating composition, particularly as a high temperature grease composition and as a high temperature lubricating oil composition, for lubrication of various machines and apparatuses such as automobiles, electric appliances, construction machines and machine tools as well as bearings.
  • the lubricating composition is suitably used for lubrication in internal combustion engines, torque converters, fluid couplings, radial bearings, rolling bearings, oil retaining bearings, fluid bearings, compressors, chain drives, gears, oil hydraulic circuits, vacuum pumps, clock parts, hard disk apparatuses, refrigerators, cutting, rolling, metal drawing, form rolling, forging, heat treatment, heat media, washing, shock absorbers, corrosion prevention, brake members and sealing devices.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
EP06810740A 2005-09-29 2006-09-28 Lubricant composition Active EP1930400B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005284217 2005-09-29
PCT/JP2006/319293 WO2007037322A1 (ja) 2005-09-29 2006-09-28 潤滑組成物

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EP1930400A1 EP1930400A1 (en) 2008-06-11
EP1930400A4 EP1930400A4 (en) 2009-02-18
EP1930400B1 true EP1930400B1 (en) 2011-08-03

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JP (1) JP5249584B2 (zh)
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WO (1) WO2007037322A1 (zh)

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JP5765806B2 (ja) * 2011-07-29 2015-08-19 昭和シェル石油株式会社 グリース組成物
CN103254966B (zh) * 2012-02-21 2015-05-20 中国石油化工股份有限公司 一种复合钙基四聚脲润滑脂及其制备方法
CN103254969B (zh) * 2012-02-21 2015-05-20 中国石油化工股份有限公司 一种复合钙基四聚脲润滑脂及其制备方法
CN103254968B (zh) * 2012-02-21 2015-03-18 中国石油化工股份有限公司 一种复合钙基四聚脲润滑脂及其制备方法
CN103289784B (zh) * 2012-02-22 2015-05-20 中国石油化工股份有限公司 一种复合钙基六聚脲润滑脂及其制备方法
CN103289786B (zh) * 2012-02-22 2015-05-20 中国石油化工股份有限公司 一种复合钙基八聚脲润滑脂及其制备方法
CN103289783B (zh) * 2012-02-22 2015-05-20 中国石油化工股份有限公司 一种复合钙基八聚脲润滑脂及其制备方法
JP5988376B2 (ja) * 2012-12-03 2016-09-07 協同油脂株式会社 鉄道車両の主電動機軸受用グリース組成物及び軸受
JP6744708B2 (ja) * 2015-01-21 2020-08-19 セイコーインスツル株式会社 転がり軸受用グリース、転がり軸受、転がり軸受装置及び情報記録再生装置
CN105802716B (zh) * 2015-01-21 2020-03-24 精工电子有限公司 滚动轴承用润滑脂、滚动轴承、滚动轴承装置以及信息记录重放装置
CN106753694A (zh) * 2016-11-23 2017-05-31 江苏金戈光电玻璃技术有限公司 一种电机润滑油添加剂
CN106635368A (zh) * 2016-12-16 2017-05-10 东莞市粤钢不锈钢制品有限公司 拉丝环保润滑剂及其制备、使用方法
CN108130179A (zh) * 2017-12-18 2018-06-08 上海摩克润滑油技术有限公司 一种汽车液压制动系统润滑脂
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EP3757195A1 (en) 2019-06-27 2020-12-30 TE Connectivity Germany GmbH Dispensable grease sealants, method for producing same, crimp connection, method for producing same, and use of the dispensable grease sealants

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JPWO2007037322A1 (ja) 2009-04-09
EP1930400A1 (en) 2008-06-11
EP1930400A4 (en) 2009-02-18
CN101278036B (zh) 2011-04-20
WO2007037322A1 (ja) 2007-04-05
CN101278036A (zh) 2008-10-01
US20090170738A1 (en) 2009-07-02
JP5249584B2 (ja) 2013-07-31

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