US20100323934A1 - Grease composition for constant velocity joint and constant velocity joint - Google Patents

Grease composition for constant velocity joint and constant velocity joint Download PDF

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Publication number
US20100323934A1
US20100323934A1 US12/521,347 US52134707A US2010323934A1 US 20100323934 A1 US20100323934 A1 US 20100323934A1 US 52134707 A US52134707 A US 52134707A US 2010323934 A1 US2010323934 A1 US 2010323934A1
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United States
Prior art keywords
constant velocity
velocity joint
grease composition
component
oil
Prior art date
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Abandoned
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US12/521,347
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English (en)
Inventor
Shinya Kondo
Akira Taniguchi
Ko Tanimura
Shinichi Takabe
Takaaki Shibata
Shinya Chuujou
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.)
NTN Corp
Kyodo Yushi Co Ltd
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NTN Corp
Kyodo Yushi Co Ltd
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Assigned to NTN CORPORATION, KYODO YUSHI CO., LTD. reassignment NTN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHUUJOU, SHINYA, SHIBATA, TAKAAKI, TAKABE, SHINICHI, TANIGUCHI, AKIRA, KONDO, SHINYA, TANIMURA, KO
Publication of US20100323934A1 publication Critical patent/US20100323934A1/en
Abandoned 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
    • 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
    • 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
    • C10M105/36—Esters of polycarboxylic 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
    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • 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
    • 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
    • C10M141/12—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 compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • 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
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • C10M2201/066—Molybdenum sulfide
    • 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
    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/084—Inorganic acids or salts thereof containing sulfur, selenium or tellurium
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/003—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/02—Well-defined aliphatic compounds
    • C10M2203/0206—Well-defined aliphatic 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
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/12—Oxidised hydrocarbons, i.e. oxidised subsequent to macromolecular formation
    • 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
    • C10M2207/2805—Esters 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
    • C10M2207/284—Esters of aromatic monocarboxylic acids
    • C10M2207/2845—Esters of aromatic 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
    • C10M2207/285—Esters of aromatic polycarboxylic acids
    • C10M2207/2855—Esters of aromatic polycarboxylic acids used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/006—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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/047—Thioderivatives not containing metallic elements
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/046—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for 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
    • 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 which reduces the low-temperature rotational torque and which provides an improved boot resistance, heat resistance and temperature control performance, and to a constant velocity joint wherein the grease composition is filled. More particularly, the present invention relates to a grease composition which provides improved high-speed durability of a constant velocity joint, a reduced low-temperature starting rotational torque, an enhanced boot resistance due to improvement of the swelling property of rubber and an improved temperature control performance, and to a constant velocity joint wherein the grease composition is filled.
  • FF vehicles Today, in the automotive industry, production of FF vehicles are increasing from the view points of weight saving and sufficiency of the interior space. Further, 4WD vehicles are also increasing from the view point of their functionality.
  • transmittance of power and steering is attained with front wheels, so that, in order to attain smooth transmittance of the power even, for example, in the state where the steering wheel is fully turned, a drive shaft composed of a constant velocity joint capable of transmitting rotational movement at a constant rate irrespective of various changes in the crossing angle between the two crossing axes is used.
  • FR vehicles and 4WD vehicles have a structure wherein the power from the engine is transmitted to the drive shaft for rear wheels through a propeller shaft which is known to act as a source and channel for transmission of noise and vibration.
  • a propeller shaft composed of conventionally used Cardan joint and a sliding spline a propeller shaft composed of a constant velocity joint capable of sliding axially while rotating at a constant rate at an operating angle is now becoming widely used.
  • the load torque on a propeller shaft is lower than that on a drive shaft
  • the operating condition of a propeller shaft is different from that of a propeller shaft: for example, a propeller shaft is used with faster rotation. Therefore, the grease used for a constant velocity joint is required to exhibit improved high-speed performance such as high-speed durability and low vibration at high speed.
  • the amount of heat (amount of rise in temperature) generated upon rotation of a constant velocity joint may be employed as an index for its high-speed performance, which amount of rise in temperature enables expectation of the critical operating condition. Since the amount of the heat generated tends to depend on the friction coefficient of the grease, development of a grease which exerts an excellent temperature control performance at high temperature is desired.
  • a grease composition containing a grease composed of a specific trimellitate and a thickener, in which grease a compound having a sulfur atom is included, has also been proposed (see, for example, Patent Document 3).
  • the rotational resistance of a constant velocity joint of an automobile is largely affected not only by the internal resistance of the constant velocity joint but also by the hardness of the boot. Especially, at low temperature, increase in the starting torque and the rotational resistance lead to decrease in operability in terms of steering and the like.
  • a constant velocity joint having, for the purpose of keeping the rotational resistance of the constant velocity joint low a boot for preventing grease leakage from the inside of the constant velocity joint and invasion of foreign matters, silicone rubber and chloroprene rubber boot materials satisfying the conditions of not more than 55 at normal temperature (25° C.) and not more than 85 at low temperature ( ⁇ 40° C.) according to JIS K 6253 durometer hardness A type have been proposed (see, for example, Patent Document 6).
  • Patent Document 1 JP 10-273691 A
  • Patent Document 2 JP 10-273692 A
  • Patent Document 3 JP 11-131082 A
  • Patent Document 4 JP 2001-11481 A
  • Patent Document 5 JP 2003-165988 A
  • Patent Document 6 JP 2005-214395 A
  • Patent Document 7 JP 2005-226038 A
  • An object of the present invention is to provide a grease composition which enhances the temperature control performance of a constant velocity joint, reduces the low-temperature rotational torque and improves the boot resistance in the working range of 150° C. to ⁇ 40° C.
  • Another object of the present invention is to provide a constant velocity joint wherein the above grease composition is filled.
  • the present inventors intensively studied to achieve the above objects to discover that a grease composition containing specific components may control generation of heat from a constant velocity joint, reduce the low-temperature rotational torque and improve the boot resistance in the working range of 150° C. to ⁇ 40° C.
  • the grease composition of the present invention for a constant velocity joint was completed based on this discovery.
  • the present invention provides the following grease composition for a constant velocity joint and a constant velocity joint.
  • a grease composition for a constant velocity joint which grease composition comprises the following components (A) to (E):
  • the grease composition for a constant velocity joint according to the above item 1, wherein the synthetic hydrocarbon oil of the component (A) is a poly- ⁇ -olefin. 3.
  • 4. The grease composition for a constant velocity joint according to any one of the above items 1 to 3, wherein the thickener of the component (B) is a urea compound. 5.
  • the grease composition for a constant velocity joint according to any one of the above items 1 to 4, wherein each of the contents of molybdenum disulfide of the component (C), molybdenum dialkyldithiocarbamate of the component (D) and zinc dithiophosphate of the component (E) is 0.1 to 10% by mass based on the total mass of the grease composition. 6.
  • a constant velocity joint wherein the grease composition according to any one of the above items 1 to 5 is filled.
  • the grease composition of the present invention enhances the temperature control performance of a constant velocity joint, reduces the low-temperature rotational torque and improves the boot resistance in the working range of 150° C. to ⁇ 40° C. Therefore, faster rotation of a propeller shaft becomes possible, and an automobile may be started under a low temperature condition, enabling to avoid a trouble in the constant velocity joint in an extremely cold region.
  • the grease composition of the present invention reduces deterioration of a boot material, so that a longer life thereof may be achieved.
  • the grease composition of the present invention may be used more preferably for a cross groove constant velocity joint which is especially suitable for reducing backlash at high speed rotation.
  • the grease composition of the present invention for a constant velocity joint is characterized in that it contains the above components (A) to (E) as indispensable components. Each of these components will now be described.
  • the base oil used in the present invention containing 10 to 95% by mass of an ester synthetic oil and 90 to 5 weight percent of a synthetic hydrocarbon oil may also be a mixture with other synthetic oils and/or mineral oils.
  • the other synthetic oils include ether synthetic oils such as alkyl diphenyl ether and polypropylene glycol; silicone oils and fluorinated oils.
  • Preferred examples of the synthetic hydrocarbon oils used for the component (A) include poly- ⁇ -olefins and polybutenes.
  • ester synthetic oils used for the component (A) are ester synthetic oils which may be produced from a C 6 -C 22 , preferably C 6 -C 10 aliphatic alcohol and a C 8 -C 22 , preferably C 8 -C 12 aromatic carboxylic acid having 2 to 6 carboxyl groups.
  • C 6 -C 22 aliphatic alcohol examples include aliphatic alcohols such as 1-hexanol, 2-hexanol, 3-hexanol, 1-heptanol, 4-methyl-2-pentanol, 2-heptanol, 3-heptanol, 1-octanol, 2-octanol, 2-ethyl-1-hexanol, 1-nonanol, nonane-2-ol, 3,5,5-trimethyl-1-hexanol, 1-decanol, 1-undecanol, lauryl alcohol, myristyl alcohol, cetyl alcohol, 14-methylhexadecane-1-ol, stearyl alcohol, oleyl alcohol, 16-methyloctadecanol, icosanol, isodecyl alcohol, 18-methylnonadecanol, 18-methylicosanol, docosanol, 20-methylhenicosanol and 2-
  • Preferred among these are 1-hexanol, 2-ethyl-1-butanol, 1-octanol, 1-heptanal, 2-octanol, 2-ethyl-1-hexanol, nonane-2-ol, 2-ethyl-1-octanol, isodecyl alcohol and 2-octyldodecanol.
  • C 8 -C 12 aromatic carboxylic acids having 2 to 6 carboxyl groups include phthalic acid, isophthalic acid, terephthalic acid, 5-methylisophthalic acid, 4,5-dimethoxyphthalic acid, hemimellitic acid, trimellitic acid, trimesic acid, mellophanic acid, prehnitic acid, pyromellitic acid and mellitic acid.
  • Preferred among these are 5-methylisophthalic acid, trimellitic acid and pyromellitic acid.
  • ester synthetic oils produced from the above aliphatic alcohol and aromatic carboxylic acid include hexyl phthalate, 2-ethylbutyl phthalate, octyl phthalate, heptyl phthalate, 2-octyl phthalate, 2-ethylhexyl phthalate, nonane-2-ol phthalate, 2-ethyloctyl phthalate, nonane-2-ol isophthalate, 2-ethyloctyl isophthalate, octyl 5-methyl isophthalate, nonane-2-ol 5-methyl isophthalate, hexyl terephthalate, octyl terephthalate, hexyl trimellitate, octyl trimellitate, heptyl trimellitate, 2-ethylbutyl trimellitate, 2-ethylhexyltrimellitate, nonane-2-ol trimellitate, isodecyl phthal
  • the total amount of the ester synthetic oils and the synthetic hydrocarbon oils of the component A is not less than 40% by mass, preferably not less than 60% by mass, more preferably not less than 80% by mass and most preferably 100% by mass, based on the total base oil.
  • Preferred examples of the thickener of the component (B) used in the present invention include diurea thickeners represented by the following General Formula (I).
  • R 1 and R 2 may be the same or different and may be C 8 -C 20 , preferably C 8 -C is alkyl; C 6 -C 12 , preferably C 6 -C 7 aryl; or C 6 -C 12 , preferably C 6 -C 7 cycloalkyl.
  • the diurea thickeners may be obtained for example by reacting a prescribed diisocyanate and a prescribed monoamine.
  • Preferred examples of the diisocyanates include diphenylmethane-44′-diisocyanate.
  • Preferred examples of the monoamines include aliphatic amines, aromatic amines, alicyclic amines and mixtures thereof.
  • Specific examples of the aliphatic amines include octylamine, dodecylamine, hexadecylamine, octadecylamine and oleylamine.
  • Specific examples of the aromatic amines include aniline and p-toluidine.
  • Specific examples of the alicyclic amines include cyclohexylamine.
  • the component B is preferably an aliphatic urea thickener obtained using, among the above-described monoamines, octylamine, dodecylamine, hexadecylamine, octadecylamine or oleylamine or a mixture thereof.
  • the content of the thickener of the component (B) may be an amount with which a necessary consistency can be obtained, and is normally preferably 1 to 30% by mass, more preferably 5 to 20% by mass based on the total mass of the grease composition.
  • the component (C), molybdenum disulfide, used in the present invention is widely used as a solid lubricant in a constant velocity joint.
  • the lubrication mechanism thereof it is known to have a layer lattice structure which is easily delaminated due to slide motion to decrease frictional resistance. It is also effective for prevention of seizing of a constant velocity joint.
  • the content of the component (C) is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass based on the total mass of the grease composition.
  • component (D), molybdenum dialkyldithiocarbamate, used in the present invention include those represented by the following General Formula (2).
  • the content of the component (D), molybdenum dialkyldithiocarbamate, is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass based on the total mass of the grease composition.
  • Examples of the component (E), zinc dithiophosphate, used in the present invention include those represented by the following General Formula (3).
  • R 5 represents C 1 -C 24 alkyl or C 6 -C 30 aryl, preferably C 1 -C 5 alkyl.
  • the content of the component (E), zinc dithiophosphate, is preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass based on the total mass of the grease composition.
  • additives normally used for a grease composition such as other extreme pressure additives, antioxidants, rust inhibitors and corrosion inhibitor, may be included in the grease composition of the present invention.
  • Examples of a constant velocity joint wherein the torque transmission member of the constant velocity joint of the present invention is spherical include fixed type constant velocity joints such as those of the Rzeppa type, Birfield type and the like and sliding type constant velocity joints such as those of the double offset type, cross groove type and the like. These have a structure wherein a ball is used as the torque transmission member, which ball is arranged on tracks formed on an outer race and an inner race of the constant velocity joint and incorporated via a cage.
  • Examples of a constant velocity joint wherein the constant velocity joint of the present invention is a fixed type constant velocity joint include the above mentioned fixed type constant velocity joints such as those of the Rzeppa type, Birfield type and the like.
  • Examples of a constant velocity joint wherein the constant velocity joint of the present invention is a plunging type constant velocity joint include the above mentioned plunging type constant velocity joints such as those of the double offset type, cross groove type and the like, which may be at an operating angle while being capable of sliding axially.
  • Viscosity of the base oil at 100° C. was measured.
  • the starting torque at ⁇ 40° C. was measured.
  • the evaluation criterion is as follows.
  • the evaluation criterion is as follows.
  • the evaluation criterion is as follows.
  • Joint temperature less than 120° C. Good ⁇ Joint temperature 120° C. or more Bad X
  • Example 1 Example 2 Example 3
  • Example 4 A Base oil 81 81 81 81 81 Ester synthetic oil (a) (20) Ester synthetic oil (b) (20) Ester synthetic oil (c) (20) Ester synthetic oil (d) (20) Ester synthetic oil (e) Ester synthetic oil (f) Synthetic hydrocarbon (80) (80) (80) (80) oil (g)
  • Example 8 A. Base oil 83.5 83.5 83.5 83.5 83.5 Ester synthetic oil (a) Ester synthetic oil (b) (20) Ester synthetic oil (c) (100) (20) (20) Ester synthetic oil (d) Ester synthetic oil (e) Ester synthetic oil (f) Synthetic hydrocarbon oil (g) (80) (80) (80) B. Thickener 15 15 15 15 C. MoS 2 0 0 0 0 D. MoDTC 0.5 0.5 0.5 0 E.
  • the grease compositions of Examples 1 to 4 of the present invention for a constant velocity joint wherein a base oil (A) containing 10 to 95% by mass of an ester synthetic oil produced from an aliphatic alcohol and an aromatic carboxylic acid and 90 to 5 weight percent of a synthetic hydrocarbon oil is used and the components (C) to (E) are included as additives, are excellent in low-temperature performance, boot resistance and temperature control performance and show low friction coefficients.
  • a base oil (A) containing 10 to 95% by mass of an ester synthetic oil produced from an aliphatic alcohol and an aromatic carboxylic acid and 90 to 5 weight percent of a synthetic hydrocarbon oil is used and the components (C) to (E) are included as additives, are excellent in low-temperature performance, boot resistance and temperature control performance and show low friction coefficients.
  • Comparative Example 1 wherein an ester synthetic oil produced from an aliphatic alcohol and an aliphatic carboxylic acid was used instead of the component (A) of the present invention, shows poorer low-temperature performance and boot resistance.
  • Comparative Example 2 of the present invention which does not contain the component (A) shows poorer low-temperature performance.
  • Comparative Examples 3 and 5 wherein only an ester synthetic oil was used as the base oil shows poorer boot resistance and temperature control performance.
  • Comparative Example 4 wherein only a synthetic hydrocarbon oil was used as the base oil shows poorer boot resistance and temperature control performance.
  • Comparative Examples 6 to 7 which do not contain molybdenum disulfide show poorer temperature control performance.
  • Comparative Example 8 which does not contain MoDTC and ZnDTP shows poorer temperature control performance and causes seizing.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)
US12/521,347 2006-12-28 2007-12-28 Grease composition for constant velocity joint and constant velocity joint Abandoned US20100323934A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006354712A JP5165887B2 (ja) 2006-12-28 2006-12-28 等速ジョイント用グリース組成物及び等速ジョイント
JP2006-354712 2006-12-28
PCT/JP2007/075247 WO2008081918A1 (ja) 2006-12-28 2007-12-28 等速ジョイント用グリース組成物及び等速ジョイント

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US14/258,495 Abandoned US20140228135A1 (en) 2006-12-28 2014-04-22 Grease composition for constant velocity joint and constant velocity joint

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JP (1) JP5165887B2 (ja)
DE (1) DE112007003204B4 (ja)
WO (1) WO2008081918A1 (ja)

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Publication number Priority date Publication date Assignee Title
US20150133353A1 (en) * 2012-06-05 2015-05-14 Jx Nippon Oil & Energy Corporation Grease composition
WO2023016908A1 (de) * 2021-08-12 2023-02-16 Klueber Lubrication Muenchen Se & Co. Kg Verwendung von hemimellitsäureester als basisöl für schmierstoffzusammensetzungen
WO2023111706A1 (en) * 2021-12-17 2023-06-22 3M Innovative Properties Company Compositions for use in low surface-energy applications

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KR20220064397A (ko) * 2019-09-18 2022-05-18 게케엔 드리펠린 인터나쇼날 게엠베하 이황화 몰리브덴 및/또는 이황화 텅스텐과 황화아연을 포함하는 등속 조인트용 그리스 조성물
CN114630887B (zh) 2019-10-30 2023-02-17 Gkn动力传动国际有限公司 用于等速万向节的包含硫化锌和硫化铜以及二硫化钼和/或二硫化钨的润滑脂组合物
CN116134117A (zh) * 2020-07-22 2023-05-16 株式会社捷太格特 润滑脂的原料、润滑脂的原料的制造方法、润滑脂的制造方法和润滑脂
JP7294546B2 (ja) 2021-03-24 2023-06-20 Dic株式会社 粒子含有グリース組成物

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US6333297B2 (en) * 2000-01-07 2001-12-25 Ntn Corporation Constant-velocity universal joint for propeller shaft
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US20060068996A1 (en) * 2004-09-30 2006-03-30 Toyoda Koki Kabushiki Kaisha Grease composition for ball type constant velocity joints and ball type constant velocity joints containing the grease composition
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US20150133353A1 (en) * 2012-06-05 2015-05-14 Jx Nippon Oil & Energy Corporation Grease composition
WO2023016908A1 (de) * 2021-08-12 2023-02-16 Klueber Lubrication Muenchen Se & Co. Kg Verwendung von hemimellitsäureester als basisöl für schmierstoffzusammensetzungen
WO2023111706A1 (en) * 2021-12-17 2023-06-22 3M Innovative Properties Company Compositions for use in low surface-energy applications

Also Published As

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JP2008163201A (ja) 2008-07-17
DE112007003204T5 (de) 2009-12-31
US20140228135A1 (en) 2014-08-14
DE112007003204B4 (de) 2020-08-06
WO2008081918A1 (ja) 2008-07-10
JP5165887B2 (ja) 2013-03-21

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