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
• • 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
  • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
  • C10M2201/14—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds
  • C10M2201/145—Inorganic compounds or elements as ingredients in lubricant compositions inorganic compounds surface treated with organic compounds 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
  • C10M2207/127—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 polycarboxylic
• • 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
  • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
  • C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains 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
  • C10M2207/28—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
  • 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
  • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
  • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
  • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
  • C10M2209/1055—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only 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
  • C10M2215/22—Heterocyclic nitrogen compounds
  • C10M2215/221—Six-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
  • C10M2215/22—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
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
  • C10N2020/01—Physico-chemical properties
  • C10N2020/02—Viscosity; Viscosity index
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • 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
  • C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• • 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
  • C10N2030/36—Seal compatibility, e.g. with rubber
• • 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 grease composition for use in a harness.
• a lubricant a grease composition obtained by adding a thickening agent to a base oil and then forming the resulting blend into a semi-solid product
• it should satisfy, for instance, the following requirements: it should have excellent corrosion resistance and oxidation stability in order that these parts can be used over a long period of time or in order to extend the service life of the parts.
• olefinic elastomers have recently been substituted for the polyvinyl chloride as a coating material for metallic parts for the purpose of reducing the quantity of materials which may not be environment-friendly and accordingly, it has been desired to design such a grease composition while taking into consideration the compatibility thereof with the coating materials for such parts.
• Patent Document 1 JP-B-6-99702
• this grease composition employs a purified mineral oil as a base oil and therefore, this grease composition is considered to have low compatibility with, for instance, olefinic elastomers and this composition is not designed to take into sufficient consideration the corrosion resistance and the oxidation stability.
• the inventors of this invention have thus conducted various studies to eliminate the foregoing drawbacks associated with the foregoing conventional techniques concerning grease compositions for, in particular, harnesses, have found that the foregoing drawbacks can efficiently be eliminated by the use of a base oil containing a specific component and specific compounds as additives for the grease composition and have thus completed the present invention.
• a grease composition for use in harnesses which comprises a thickening agent, a base oil and additives, wherein the base oil comprises a polyoxyalkylene glycol ether and the additives comprise a quinoline compound and a benzotriazole compound.
• the thickening agent is at least one member selected from the group consisting of lithium soaps and bentonite materials modified with organic compounds (organically modified bentonite materials).
• the polyoxyalkylene glycol ether has a kinematic viscosity as determined at a temperature of 40° C. ranging from 30 to 400 mm 2 /s.
• the content of the quinoline compound ranges from 0.1 to 10% by mass on the basis of the total mass of the grease composition
• the content of the benzotriazole compound ranges from 0.1 to 10% by mass on the basis of the total mass of the grease composition.
• the grease composition of the present invention makes use of a polyoxyalkylene glycol ether-containing base oil and comprises, as additives, a quinoline compound and a benzotriazole compound and therefore, the grease composition is excellent in the compatibility with the coating materials for parts of harnesses such as olefinic elastomers, the corrosion resistance and the resistance to oxidation.
• the grease composition of the present invention is characterized in that it uses, as a base oil, one containing a polyoxyalkylene glycol ether, which does not adversely affect the olefinic materials too much.
• a polyoxyalkylene glycol ether which does not adversely affect the olefinic materials too much.
• polyoxyalkylene glycol ethers represented by the following general formula I: R 1 O—(CH 2 CHR 2 O) n —R 3 Formula I
• R 1 and R 3 each independently represents a hydrogen atom or an alkyl group having 1 to 20, preferably 1 to 6 carbon atoms (such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a pentyl group or a hexyl group);
• R 2 represents an alkyl group having 1 to 10, preferably 1 to 4 carbon atoms (such as a methyl group, an ethyl group, a propyl group or a butyl group); and
• n represents a numeral ranging from 5 to 30 and preferably 8 to 20, provided that R 1 and R 3 do not simultaneously represent hydrogen atoms.
• polyoxyalkylene moieties of the polyoxyalkylene glycol ethers represented by the general formula I include polyoxyethylene, polyoxypropylene, poly(oxypropylene-oxyethylene), poly(oxybutylene-oxyethylene), poly(oxybutylene-oxypropylene), poly(oxypentylene-oxyethylene) and poly(oxypentylene-oxypropylene).
• the polyoxyalkylene glycol ethers represented by the general formula I usable herein may be a mono-ether or a di-ether and specific examples thereof include polyoxypropylene monopropyl ether, polyoxypropylene monobutyl ether, polyoxybutylene monobutyl ether, polyoxyethylene oxypropylene monopropyl ether, polyoxyethylene oxypropylene monobutyl ether, polyoxyethylene oxypropylene monopentyl ether, and polyoxypropylene dimethyl ether.
• Preferred are polyoxypropylene monobutyl ether, and polyoxypropylene dimethyl ether, most preferred is polyoxypropylene dimethyl ether.
• the base oil used in the present invention comprises a polyoxyalkylene glycol ether in an amount of preferably not less than 50% by mass, more preferably not less than 80% by mass and most preferably 100% by mass on the basis of the total mass of the base oil.
• the base oil used in the present invention may further comprise other base oil materials currently used in the grease composition such as mineral oils, synthetic hydrocarbon oils, and alkyl diphenyl ether oils in addition to the polyoxyalkylene glycol ether, but the amount thereof is preferably less than 10% by mass on the basis of the total mass of the base oil.
• the kinematic viscosity of the polyoxyalkylene glycol ether as determined at 40° C. preferably ranges from 30 to 400 mm 2 /s and more preferably 80 to 120 mm 2 /s.
• thickening agent used in the grease composition for harnesses according to the present invention there may be listed, for instance, those conventionally known in this art such as metal salts of fatty acids, bentonite modified with organic compounds and PTFE, with metal salts of fatty acids and bentonite modified with organic compounds being particularly preferably used herein.
• constituent fatty acids of the foregoing metal salts of fatty acids preferably used herein are those having 10 to 30 and more preferably 16 to 20 carbon atoms and examples thereof preferably used herein are lauric acid, myristic acid, palmitic acid, stearic acid, 12-hydroxy stearic acid and oleic acid.
• metal salts of these fatty acids there may be mentioned, for instance, alkali metal salts such as sodium and lithium salts, alkaline earth metal salts such as barium and calcium salts and trivalent metal salts such as aluminum salts.
• Usable herein further include, for instance, salts of mixtures each comprising at least two fatty acids including dibasic acids with metals such as aluminum, calcium and lithium, or complex metallic soaps.
• metals such as aluminum, calcium and lithium
• metal salts of fatty acids most preferably used herein is lithium 12-hydroxy stearate because of its excellent water resistance, heat resistance and mechanical stability.
• the amount of the thickening agent to be incorporated into the grease composition of the present invention preferably ranges from 2 to 35 parts by mass and more preferably 5 to 15 parts by mass per 100 parts by mass of the base oil. This is because, if the amount thereof is less than 2 parts by mass, there would be observed such a tendency that the resulting grease composition is in a highly fluidized state and it is thus too soft, while if the amount thereof exceeds 35 parts by mass, the resulting composition is liable to be too hard to use as a grease composition for harnesses.
• quinoline compounds used in the grease composition for harnesses according to the present invention are compounds represented by the following general formula II, such as trimethyl dihydro-quinoline oligomer.
• R 4 , R 5 and R 6 may be the same or different and each preferably represents an alkyl group preferably having 1 to 10 and more preferably 1 to 3 carbon atoms and n is a numeral preferably ranging from 1 to 10 and more preferably 1 to 5.
• the amount of these quinoline compounds to be incorporated into the grease composition of the present invention preferably ranges from 0.1 to 10% by mass, more preferably 0.5 to 5% by mass and most preferably 1.0 to 3% by mass on the basis of the total mass of the grease composition.
• the grease composition of the present invention may further comprise other anti-oxidants, for instance, a phenolic compound such as 2,6-di-t-butyl cresol and/or an amine compound such as phenyl- ⁇ -naphthyl-amine, in combination with the foregoing components.
• a phenolic compound such as 2,6-di-t-butyl cresol
• an amine compound such as phenyl- ⁇ -naphthyl-amine
• the grease composition for harnesses according to the present invention may comprise a benzotriazole compound as the corrosion inhibitor.
• benzotriazole compounds preferably used herein are those represented by the following general formula III:
• R 7 represents a hydrogen atom or an alkyl group having 1 to 10 and preferably 1 to 3 carbon atoms such as a methyl, ethyl or propyl group
• R 8 and R 9 each independently represents a hydrogen atom or an alkyl group having 1 to 20 and preferably 1 to 10 carbon atoms such as a methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, hexyl, heptyl or octyl group.
• Particularly preferably used herein are, for instance, benzotriazole compounds represented by the general formula III in which R 7 represents a methyl group and R 8 and R 9 each represents a 2-ethylhexyl group.
• the content of the benzotriazole compound present in the grease composition of the present invention preferably ranges from 0.1 to 10% by mass, more preferably 0.3 to 5% by mass and most preferably 0.5 to 3% by mass on the basis of the total mass of the grease composition.
• the grease composition of the present invention may comprise a corrosion inhibitor other than the foregoing benzotriazole compound, such as succinic acid compound, typical of an alkenyl succinic acid anhydride, and/or sulfonic acid compound represented by an alkyl naphthalene-sulfonic acid in combination with the triazole type one and the amount thereof to be used is desirably not more than 5.0% by mass on the basis of the total mass of the grease composition.
• a corrosion inhibitor other than the foregoing benzotriazole compound such as succinic acid compound, typical of an alkenyl succinic acid anhydride, and/or sulfonic acid compound represented by an alkyl naphthalene-sulfonic acid in combination with the triazole type one and the amount thereof to be used is desirably not more than 5.0% by mass on the basis of the total mass of the grease composition.
• Lithium soap (lithium 12-hydroxy-stearate)
• Dioctyl sebacate Kinematic viscosity (at 40° C.): 12 mm 2 /s.
• Benzotriazole compound (a mixture comprising 1-[N,N-bis(2-ethylhexyl)-aminomethyl]-4-methyl benzotriazole and 1-[N,N-bis(2-ethylhexyl)-aminomethyl]-5-methyl benzotriazole);
• Phenolic compound (octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate);
• Succinic acid compound (alkenyl succinic acid anhydride).
• a candidate grease composition was applied onto the lower half of the surface of a copper sheet, a brass sheet or tin-plated sheet, in a thickness of 2 mm, followed by allowing each sheet to stand at 60° C., 80% RH for 168 hours and the subsequent confirmation of whether each test material underwent any external color change or not.
• the corrosion resistance of each test material was evaluated according to the following evaluation criteria:
• test material is not subjected to any corrosion
• A represents the volume of each elastomer observed prior to the immersion test and B the volume thereof observed after the immersion test.
• Each sample was evaluated on the basis of the following criteria:
• the sample elastomer has a volume change of less than ⁇ 10%
• the sample elastomer has a volume change of not less than ⁇ 10%.

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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)

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Cited By (5)

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• 2005
  • 2005-03-14 JP JP2005071455A patent/JP2006249376A/ja active Pending
• 2006
  • 2006-03-07 US US11/368,681 patent/US20060205613A1/en not_active Abandoned
  • 2006-03-14 DE DE102006011666A patent/DE102006011666A1/de not_active Withdrawn

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