US20060154833A1 - Lubricating grease composition - Google Patents

Lubricating grease composition Download PDF

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Publication number
US20060154833A1
US20060154833A1 US11/300,676 US30067605A US2006154833A1 US 20060154833 A1 US20060154833 A1 US 20060154833A1 US 30067605 A US30067605 A US 30067605A US 2006154833 A1 US2006154833 A1 US 2006154833A1
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US
United States
Prior art keywords
fatty acid
metal salts
lubricating grease
use according
grease composition
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.)
Abandoned
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US11/300,676
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English (en)
Inventor
Tetsuya Katou
Koichi Numazawa
Kazushige Oomura
Keiji Tanaka
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Shell USA Inc
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Individual
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Publication date
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Assigned to SHELL OIL COMPANY reassignment SHELL OIL COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KATOU, TETSUYA, NUMAZAWA, KOICHI, OOMURA, KAZUSHIGE, TANAKA, KEIJI
Publication of US20060154833A1 publication Critical patent/US20060154833A1/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
    • C10M169/02—Mixtures of base-materials and thickeners
    • 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
    • C10M123/00—Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential
    • C10M123/02—Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential at least one of them being a non-macromolecular compound
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M123/00—Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential
    • C10M123/04—Lubricating compositions characterised by the thickener being a mixture of two or more compounds covered by more than one of the main groups C10M113/00 - C10M121/00, each of these compounds being essential at least one of them being a macromolecular compound
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
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    • C10M2215/10—Amides of carbonic or haloformic acids
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    • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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    • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2217/045—Polyureas; Polyurethanes
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    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
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    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
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    • 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
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/042—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for automatic transmissions
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C10N2040/045—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives for continuous variable transmission [CVT]
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    • 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
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    • 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 grease composition with improved fretting characteristics.
  • Fretting corrosion in grease lubrication differs from general chemical corrosive abrasion. It is a species of the mechanical abrasion phenomenon. Various studies of lubricating agents have been made in order to constrain or prevent it.
  • Fretting refers to the case where microvibrations or microscopic sliding occur between two bodies opposed to each other, and the abrasion dust generated by the microvibrations between steel and steel turns, in the atmosphere, into a fine, brown iron oxide powder which then mixes with the grease, so that the grease turns a brown colour.
  • the abrasion generated by these relative microvibrations is called fretting or microvibration abrasion and, because it is accompanied by oxidation in the atmosphere, it may be called fretting corrosion.
  • Laid-open Japanese Patent Application 2003-231893 describes a grease composition which has excellent low-torque performance, anti-fretting performance and low out-gas performance, being a grease composition containing an alkali metal salt or an alkaline earth metal salt of a higher fatty acid as a thickening agent, two types of carbonic acid ester compounds having different kinematic viscosities, and a metal salt of an organic sulphonic acid where the metal salt is from an alkali metal, an alkaline earth metal or zinc.
  • Laid-open Japanese Patent Application 2002-265970 describes a grease composition capable of improving acoustic performance and anti-fretting performance of ball bearings simultaneously, being a grease composition comprised of a base oil and a thickening agent as the principal constituents, where the thickening agent is comprised of a mixture of a urea compound and a lithium soap.
  • EP-A-1314774 describes a lubricating grease composition for use in constant velocity joints (CVJs) which is said to have anti-flaking and anti-seizure properties.
  • Said lubricating grease composition comprises lubricant base oil, 0.01 to 10% by mass of a fatty acid salt, 0.01 to 10% by mass of carbonate; 2 to 30% by mass of a thickener; and 0.1 to 20% by mass of a sulphur type extreme-pressure agent.
  • EP-A-0767237 discloses a lubricating grease composition for a constant velocity joint containing a base oil, a thickener, boron nitride powders, and a sulphur-phosphorus containing extreme pressure agent.
  • EP-A-0767237 states that said lubricating grease composition exhibits superior anti-flaking performance and can prolong the lifetime of a constant velocity joint.
  • said lubricating grease composition may further comprise an organic compound such as zinc dithiophosphate, zinc salts of fatty acids and zinc naphthenate, in order to further improve the anti-flaking performance.
  • EP-A-0761806 describes a lubricating grease composition
  • a lubricating grease composition comprising a major amount of an oil of lubricating viscosity, a thickener selected from the group consisting of monoureas, diureas, triureas and polyureas, or mixtures thereof, and an oil soluble neutral or overbased zinc salt of a carboxylic acid selected from the group consisting of zinc salts of fatty acids, the zinc salts of hydrocarbyl-substituted salicyclic acids and zinc glyoxylates.
  • a lubricating grease composition comprising:
  • the base oil in the lubricating grease composition may be selected from mineral oil, synthetic oil or mixtures thereof. Synthetic oils are particularly preferred.
  • the mineral oils that may be conveniently used are the refined residues of lubricating oils obtained by vacuum distillation of atmospheric-pressure residual oils obtained by atmospheric distillation of crude oil, examples of which are paraffin oils, naphthene oils or normal paraffin.
  • synthetic oils examples include poly- ⁇ -olefins (PAOs), ether oils or ester oils.
  • PAOs poly- ⁇ -olefins
  • Base oils of the type manufactured by the hydroisomerisation of wax, such as those sold by the Shell group under the trade designation “XHVI” may also be used.
  • Poly- ⁇ -olefins include oligomers of alkenes such as decene, dodecene or 1-tetradecene, which oligomers comprise oligomer mixtures of di- to hexamers.
  • PAOs may be conveniently selected according to viscosity and degree of polymerisation.
  • alkyldiphenyl ethers may be conveniently used.
  • Said ethers are the addition reaction products of 1 mol ordinary diphenyl ether and from 1 to 3 mol of ⁇ -olefins having from 10 to 22 carbons.
  • the characteristics of ⁇ -olefins differ according to the number of carbons and the mole numbers used, but they are generally colourless to transparent liquids, and are themselves known products. Specifically, it is possible to use those disclosed in Japanese Patent Publication 51-44263, Japanese Patent Publication 52-1722 and Japanese Patent Publication 52-24628.
  • alkyldiphenyl ether oils which are commercially available, include those available under the trade designations “Moresco Hilube LB-15”, “Moresco Hilube LB-22”, “Moresco Hilube LB-32”, “Moresco Hilube LB-46”, “Moresco Hilube LB-68” and “Moresco Hilube LB-100” from Matsumura Oil Research Corporation.
  • ester oils diester oils, triester oils and tetraester oils may be conveniently used.
  • the diester oils may be expressed by the general formula (1): R 1 OCO(—CH 2 —) n COOR 2 (1) wherein R 1 and R 2 denote aliphatic hydrocarbon groups having from 3 to 18 carbon atoms and n is an integer from 3 to 12.
  • ester oils examples include di-2-ethylhexyl sebacate, di-2-ethylhexyl azelate, di-2-ethylhexyl adipate, di-n-octyl sebacate, di-n-octyl azelate and di-n-octyl adipate.
  • the triester oils may be expressed by the general formula (2): R 1 —C(—CH 2 —COOR 2 ) 3 (2) wherein R 1 denotes a hydrogen atom or an aliphatic hydrocarbon group having from 1 to 10 carbons and R 2 denotes an aliphatic hydrocarbon group having from 3 to 18 carbon atoms. It is particularly preferred if R 2 is an aliphatic hydrocarbon group having from 3 to 10 carbon atoms.
  • the triesters may be reaction products of fatty acids and trihydric alcohols such as trimethylolpropane and glycerine.
  • the tetraester oils may be expressed by the general formula (3): C(—CH 2 —COOR 1 ) 4 (3) wherein R 1 denotes an aliphatic hydrocarbon group having from 3 to 18 carbon atoms. It is particularly preferred if R 1 is an aliphatic hydrocarbon group having from 3 to 10 carbon atoms.
  • the tetraesters may be reaction products of fatty acids and tetrahydric alcohols such as pentaerythritol.
  • the base oil (A) is preferable for the base oil (A) to have a kinematic viscosity in the range of from 10 to 40 mm 2 /s (40° C.).
  • the one or more urea compounds (B) in the lubricating grease composition may be conveniently chosen from the urea compounds used as thickening agents in typical lubricating grease compositions.
  • Preferred urea compounds are diurea compounds, triurea compounds and tetraurea compounds.
  • the diurea compounds are reaction products of diisocyanates and monoamines which may be aliphatic amines, alicyclic amines and/or aromatic amines.
  • Examples of the monoamines that may be conveniently used include octylamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, oleylamine, aniline, p-toluidine, cyclohexylamine.
  • diisocyanates examples include aliphatic diisocyanates, alicyclic diisocyanates and aromatic diisocyanates: for example, 4,4′-diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI), naphthalene diisocyanate, p-phenylene diisocyanate, trans-1,4-cyclohexane diisocyanate (CHDI), 1,3-bis-(isocyanatomethyl-benzene), 4,4′-dicyclohexylmethane diisocyanate (H12MDI), 1,3-bis-(isocyanatomethyl)-cyclohexane (H6XDI), hexamethylene diisocyanate (HDI), 3-isocyanatomethyl-3,3,5′-trimethylcyclohexylisocyanate (IPDI), phenylene diisocyanate, m-tetramethylxylene
  • MDI 4,4′
  • MDI 4-4′-diphenylmethane diisocyanate
  • TDI tolylene diisocyanate
  • CHDI trans-1,4-cyclohexane diisocyanate
  • H12MDI 4,4′-dicyclohexylmethane diisocyanate
  • the triurea compounds may be expressed by the general formula (4): wherein R 1 and R 2 denote hydrocarbylene groups, and R 3 and R 4 denote hydrocarbyl groups.
  • These compounds are reaction products of 2 mol aliphatic, alicyclic or aromatic diisocyanate, 1 mol aliphatic, alicyclic or aromatic diamine, 1 mol aliphatic, alicyclic or aromatic amine and 1 mol aliphatic, alicyclic or aromatic alcohol. They are obtained by mixing the aforementioned compounds in base oil so as to give the respective aforementioned proportions, and effecting the reaction. For example, they may be obtained by reacting 2 mol tolylene diisocyanate, 1 mol ethylene diisocyanate, 1 mol octadecylamine and 1 mol octadecyl alcohol in a base oil.
  • aliphatic, alicyclic or aromatic diisocyanates examples include 4,4′-diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI), naphthalene diisocyanate, p-phenylene diisocyanate, trans-1,4-cyclohexane diisocyanate (CHDI), 1,3-bis-(isocyanatomethyl-benzene), 4,4′-dicyclohexylmethane diisocyanate (H12MDI), 1,3-bis-(isocyanatomethyl)-cyclohexane (H6XDI), hexamethylene diisocyanate (HDI), 3-isocyanatomethyl-3,3,5′-trimethylcyclohexylisocyanate (IPDI), phenylene diisocyanate, m-tetramethylxylene diisocyanate (m-TMXDI) and p-tetra
  • MDI 4-4′-diphenylmethane diisocyanate
  • TDI tolylene diisocyanate
  • CHDI trans-1,4-cyclohexane diisocyanate
  • H12MDI 4,4′-dicyclohexylmethane diisocyanate
  • monoamines examples include aliphatic, alicyclic and aromatic monoamines.
  • Aliphatic monoamines are preferably saturated or unsaturated aliphatic amines with from 8 to 24 carbon atoms and may be used in branched or straight-chain forms, but straight-chain forms are particularly preferred.
  • Octylamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, oleylamine, aniline, p-toluidine, cyclohexylamine are preferred.
  • Aliphatic, alicyclic or aromatic diamines, aliphatic diamines that may be conveniently used are ethylenediamine, trimethylenediamine, tetramethylenediamine, hexamethylenediamine, octamethylenediamine and decamethylenediamine, alicyclic diamines such as diaminocyclohexane, and aromatic diamines such as phenylenediamine, benzidine, diaminostilbene and tolidine, which are all diamines with from 2 to 12 carbon atoms therein.
  • monoalcohols examples include aliphatic, alicyclic or aromatic alcohols branched or straight-chain.
  • Aliphatic alcohols which are C 8 to C 24 saturated or unsaturated aliphatic alcohols may be conveniently used.
  • Straight-chain forms are particularly preferred.
  • octyl alcohol decyl alcohol, dodecyl alcohol, tetradecyl alcohol, hexadecyl alcohol, octadecyl alcohol and oleyl alcohol are preferred.
  • An example of an alicyclic alcohol that may be conveniently used is cyclohexyl alcohol.
  • aromatic alcohols that may be conveniently used include benzyl alcohol, salicyl alcohol, phenethyl alcohol, cinnamyl alcohol and hydrocinnamyl alcohol.
  • the tetraurea compounds may be expressed by the general formula (5): wherein R 1 and R 2 denote hydrocarbylene groups and R 3 denotes a hydrocarbyl group.
  • These compounds are reaction products of 2 mol aliphatic, alicyclic or aromatic diisocyanate, 1 mol aliphatic, alicyclic or aromatic diamine and 2 mol aliphatic, alicyclic or aromatic amine. They are obtained by mixing the aforementioned compounds in a normal base oil so as to give the respective aforementioned proportions, and effecting the reaction. For example, they may be obtained by reacting 2 mol tolylene diisocyanate, 1 mol ethylenediamine and 2 mol octadecylamine in base oil.
  • diisocyanates examples include aliphatic diisocyanates, alicyclic diisocyanates and aromatic diisocyanates: for example, 4,4′-diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI), naphthalene diisocyanate, p-phenylene diisocyanate, trans-1,4-cyclohexane diisocyanate (CHDI), 1,3-bis-(isocyanatomethyl-benzene), 4,4′-dicyclohexylmethane diisocyanate (H12MDI), 1,3-bis-(isocyanatomethyl)-cyclohexane (H6XDI), hexamethylene diisocyanate (HDI), 3-isocyanatomethyl-3,3,5′-trimethylcyclohexylisocyanate (IPDI), phenylene diisocyanate, m-tetramethylxylene diis
  • MDI 4,
  • MDI 4-4′-diphenylmethane diisocyanate
  • TDI tolylene diisocyanate
  • CHDI trans-1,4-cyclohexane diisocyanate
  • H12MDI 4,4′-dicyclohexylmethane diisocyanate
  • aliphatic diamines such as ethylenediamine, trimethylenediamine, tetramethylenediamine, hexamethylenediamine, octamethylenediamine and decamethylenediamine
  • alicyclic diamines such as diaminocyclohexane
  • aromatic diamines such as phenylenediamine, benzidine, diaminostilbene and tolidine, which are all diamines with from 2 to 12 carbon atoms, may be conveniently used.
  • aliphatic, alicyclic and aromatic monoamines may be conveniently used.
  • Branched or straight-chain aliphatic monoamines which are saturated or unsaturated aliphatic amines with from 8 to 24 carbon atoms are preferred.
  • Straight-chain saturated or unsaturated aliphatic amines with from 8 to 24 carbon atoms are particularly preferred.
  • cyclohexylamine may be cited.
  • aromatic monoamines examples include aniline and p-toluidine.
  • the one or more urea compounds (B) are preferably blended in an amount in the range of from 2 to 30% by weight, and more preferably in the range of from 2 to 20% by weight, based on the total weight of the lubricating grease composition. If the amount of said one or more urea compounds (B) is less than 2% by weight, then the effect of the thickening agent may be too small and the consistency may not be that of a grease. If the amount of said one or more urea compounds (B) exceeds 30% by weight, then the grease may become too hard and sufficient lubricating effect may not be obtained.
  • the one or more metal salts of a fatty acid in the lubricating grease composition are preferably metal salts which are comprised of saturated or unsaturated fatty acids having from 4 to 18 carbon atoms, which may also comprise one or more hydroxyl groups, wherein the metal is selected from the group comprised of aluminium, magnesium, zinc, calcium and mixtures thereof.
  • Metal salts of a fatty acid wherein the metal is selected from zinc, aluminium and magnesium are preferred.
  • Particularly preferred metal salts of a fatty acid are those wherein the metal is selected from zinc and aluminium.
  • Fatty acids that may be conveniently used for the metal salts of a fatty acid include: as straight-chain saturated acids, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid and 12-hydroxystearic acid; as branched saturated acids, 4-6-dimethyloctanoic acid, 2-methylundecanoic acid, 2-methyltetradecanoic acid and 2-ethylpentadecanoic acid; as unsaturated acids, 3-octenoic acid, 2-decenoic acid, caproleinic acid, myristoleinic acid, 2-methyl-2-dodecenoic acid, oleic acid, elaidic acid, linolic acid, linolenoic acid and risinolic acid.
  • Lubricating grease compositions having extremely good anti-fretting properties are obtained by blending preferably in the range of from 0.1 to 25% by weight, more preferably in the range of from 0.5 to 20% by weight, of said one or more metal salts of fatty acid wherein metals selected from the group comprising aluminium, magnesium, zinc, calcium and mixtures thereof, based on the total weight of the lubricating grease composition.
  • said one or more metal salts of a fatty acid are present in an amount of less than 0.1% by weight, then the effect of the anti-fretting properties may be inadequate, and if it exceeds 25% by weight, then the effect of the one or more metal salts of a fatty acid may become too powerful and the effect of the anti-fretting properties may diminish.
  • the lubricating grease composition may contain, as required, additional additives such as anti-oxidants, rust inhibitors, metal corrosion inhibitors, oiliness agents (also known as friction modifiers), anti-wear agents, extreme-pressure additives and solid lubricant additives.
  • additional additives such as anti-oxidants, rust inhibitors, metal corrosion inhibitors, oiliness agents (also known as friction modifiers), anti-wear agents, extreme-pressure additives and solid lubricant additives.
  • additives include anti-oxidants such as 2,6-ditertiary-butyl-4-methylphenol, N-phenyl- ⁇ -naphthylamine and 2,6-ditertiary-butyl para-cresol, rust inhibitors such as oxidised paraffin, aminoimidazoline, N,N′-trimethylenediamine diolate, sorbitan monoolate, metal sulphonates, alkenyl succinates and derivatives thereof, ester-type rust inhibitors or amine-type rust inhibitors, anti-wear or extreme-pressure additives such as sulphur compounds, for example, olefin sulphide, sulphurised oils and fats, diphenyl disulphide and dibenzyl disulphide, chlorine compounds such as chlorinated diphenyl or chlorinated paraffin, dithiophosphates such as zinc dithiophosphate and molybdenum dithiophosphate, dithiocarbamates such as zinc dithiocarbamate and
  • the present invention further provides a method of reducing fretting corrosion in devices such as bearings, splines, couplings and leaf springs, said method comprising lubricating said devices with a lubricating grease composition as hereinbefore described.
  • a lubricating grease composition capable of greatly improving anti-fretting properties, and bearings, splines, couplings and leaf springs using said lubricating grease composition.
  • diurea compounds used as the thickening agent in the lubricating grease compositions are shown by general formula (6): and:
  • the base oils used in the lubricating grease compositions that were tested were:
  • Lubricating grease compositions were obtained by mixing and heating the thickening agents, base oils and additives shown in Table 1 in the proportions shown in Table 1.
  • Mg-St The fretting abrasion inhibition effect was large.
  • a lubricating grease composition was obtained by mixing, at room temperature, 7% by weight of Aliphatic A as the diurea compound and 1% by weight of aluminium stearate with 92% by weight of Mineral Oil A.
  • this lubricating grease composition was 276 and the dropping point was above 250 (°C.).
  • the anti-fretting abrasion inhibition effect at room temperature was extremely large (0.3 mg).
  • the amount of aluminium stearate added should preferably be in the range of from 0.1 to 20% by weight and that its effect is particularly large when present in the range of from 0.1 to 5% by weight.
  • Example Example 40 41 42 Thickening Diurea compound: agent Aliphatic A 7 7 7 Base oil Synthetic Oil A 92 92 92 Additives Mg-St 1 Zn-St 1 Al-St 1 Headings Penetration (dmm) 285 288 286 Dropping point ° C. >250 >250 >250 Anti-fretting ⁇ ⁇ ⁇ grade, low temperature Anti-fretting 3.8 1.6 0.5 result (mg), low temperature
  • tetraurea compound For the tetraurea compound, a uniform solution was made by adding 7.49 g of tolylene diisocyanate to 100 g of base oil, and heating to 50° C. To this solution were added 11.75 g of oleylamine and 1.29 g of ethylenediamine dissolved in 80 g of base oil. When the mixture was agitated a gel-like substance was immediately produced.
  • triurea compound a uniform solution was made by adding 9.20 g of tolylene diisocyanate and 7.14 g of stearyl alcohol to 100 g of base oil, and heating to 50° C.

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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Rolling Contact Bearings (AREA)
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US20090233824A1 (en) * 2006-03-30 2009-09-17 Nippon Steel Chemical Co., Ltd. Lubricant Base Oil
US20110136709A1 (en) * 2008-07-07 2011-06-09 Keiji Tanaka Grease composition
US20110160105A1 (en) * 2008-07-07 2011-06-30 Keiji Tanaka Grease composition
CN102372655A (zh) * 2010-08-26 2012-03-14 中国石油化工股份有限公司 一种碳酰四胺化合物及其制备方法
US20120195678A1 (en) * 2009-10-05 2012-08-02 Ntn Corporation Grease composition and constant velocity joint
US20140193110A1 (en) * 2011-09-26 2014-07-10 Nsk Ltd Grease Composition and Wheel Supporting Rolling Bearing Unit Having Grease Composition Packed Therein
WO2019083816A1 (en) * 2017-10-23 2019-05-02 Epitracker, Inc. FATTY ACID ANALOGUES AND THEIR USE IN THE TREATMENT OF STATES RELATED TO METABOLIC SYNDROME
US11643615B2 (en) 2017-12-25 2023-05-09 Nsk Ltd. Lubricant composition
US11767488B2 (en) 2017-12-25 2023-09-26 Nsk Ltd. Lubricant composition and rolling bearing having same sealed therein
US11992473B2 (en) 2018-05-23 2024-05-28 Epitracker, Inc. Compositions and methods for diagnosis and treatment of conditions related to the quality of aging and longevity

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JP5403989B2 (ja) 2008-10-16 2014-01-29 株式会社ジェイテクト 潤滑剤組成物とそれを用いた減速機および電動パワーステアリング装置
FR2942627B1 (fr) * 2009-02-27 2011-05-06 Total Raffinage Marketing Composition de graisse
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JP2013166901A (ja) * 2012-02-17 2013-08-29 Nsk Ltd 潤滑油、及びそれを含む転がり軸受
JP5931510B2 (ja) * 2012-03-05 2016-06-08 Ｊｘエネルギー株式会社 グリース組成物
KR101496527B1 (ko) * 2012-12-27 2015-02-26 우정훈 온도 특성 및 마모 특성이 우수한 그리스 조성물
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JP6741518B2 (ja) * 2015-08-25 2020-08-19 株式会社ジェイテクト 車両用転動装置
WO2018101432A1 (ja) * 2016-11-30 2018-06-07 ミネベアミツミ株式会社 グリース組成物および転がり軸受
JP2018090783A (ja) * 2016-11-30 2018-06-14 ミネベアミツミ株式会社 グリース組成物および転がり軸受
DE102016125289A1 (de) * 2016-12-21 2018-06-21 Fuchs Petrolub Se Verwendung von Calcium-Komplex- und Calcium-Sulfonat-Komplex-Schmierfetten zur Schmierung von Drahtseilen
CN109913287B (zh) * 2019-03-28 2022-05-20 中国石油化工股份有限公司 一种四脲润滑脂及制备方法
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PL440408A1 (pl) * 2022-02-17 2023-05-15 Jerzy Antoni Raszkiewicz Kompozycja smaru plastycznego i sposób jej wytwarzania

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US20090233824A1 (en) * 2006-03-30 2009-09-17 Nippon Steel Chemical Co., Ltd. Lubricant Base Oil
US8153569B2 (en) * 2006-03-30 2012-04-10 Nippon Steel Chemical Co., Ltd. Lubricant base oil
US20110136709A1 (en) * 2008-07-07 2011-06-09 Keiji Tanaka Grease composition
US20110160105A1 (en) * 2008-07-07 2011-06-30 Keiji Tanaka Grease composition
US20120195678A1 (en) * 2009-10-05 2012-08-02 Ntn Corporation Grease composition and constant velocity joint
CN102372655A (zh) * 2010-08-26 2012-03-14 中国石油化工股份有限公司 一种碳酰四胺化合物及其制备方法
US20140193110A1 (en) * 2011-09-26 2014-07-10 Nsk Ltd Grease Composition and Wheel Supporting Rolling Bearing Unit Having Grease Composition Packed Therein
WO2019083816A1 (en) * 2017-10-23 2019-05-02 Epitracker, Inc. FATTY ACID ANALOGUES AND THEIR USE IN THE TREATMENT OF STATES RELATED TO METABOLIC SYNDROME
US10792266B2 (en) 2017-10-23 2020-10-06 Epitracker, Inc. Fatty acid analogs and their use in the treatment of conditions related to metabolic syndrome
US11951088B2 (en) 2017-10-23 2024-04-09 Epitracker, Inc. Fatty acid analogs and their use in the treatment of conditions related to metabolic syndrome
US11643615B2 (en) 2017-12-25 2023-05-09 Nsk Ltd. Lubricant composition
US11767488B2 (en) 2017-12-25 2023-09-26 Nsk Ltd. Lubricant composition and rolling bearing having same sealed therein
US11992473B2 (en) 2018-05-23 2024-05-28 Epitracker, Inc. Compositions and methods for diagnosis and treatment of conditions related to the quality of aging and longevity

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AU2005315557A1 (en) 2006-06-22
AU2005315557B2 (en) 2009-04-23
JP2006169386A (ja) 2006-06-29
BRPI0519092A2 (pt) 2008-12-23
ZA200704729B (en) 2008-06-25
EP1828356A1 (en) 2007-09-05
KR20070092741A (ko) 2007-09-13
CN101111591A (zh) 2008-01-23
MX2007007175A (es) 2007-08-14
WO2006064053A1 (en) 2006-06-22

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