WO2013108887A1 - Composition de graisse et roulement - Google Patents

Composition de graisse et roulement Download PDF

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Publication number
WO2013108887A1
WO2013108887A1 PCT/JP2013/050968 JP2013050968W WO2013108887A1 WO 2013108887 A1 WO2013108887 A1 WO 2013108887A1 JP 2013050968 W JP2013050968 W JP 2013050968W WO 2013108887 A1 WO2013108887 A1 WO 2013108887A1
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WIPO (PCT)
Prior art keywords
grease composition
mass
bearing
oil
composition according
Prior art date
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PCT/JP2013/050968
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English (en)
Japanese (ja)
Inventor
理 齊田
裕次 大貫
山本　正道
Original Assignee
協同油脂株式会社
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Publication date
Application filed by 協同油脂株式会社 filed Critical 協同油脂株式会社
Priority to DE112013000604.9T priority Critical patent/DE112013000604B4/de
Priority to CN201380005510.1A priority patent/CN104053757A/zh
Priority to US14/363,913 priority patent/US20140336090A1/en
Publication of WO2013108887A1 publication Critical patent/WO2013108887A1/fr

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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
    • C10M169/04—Mixtures of base-materials and additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • 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
    • C10M105/38—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
    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/26—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms containing a nitrogen-to-nitrogen double bond
    • 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
    • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
    • C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
    • C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the 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
    • 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
    • C10M2207/04—Ethers; Acetals; Ortho-esters; Ortho-carbonates
    • C10M2207/0406—Ethers; Acetals; Ortho-esters; Ortho-carbonates 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms 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
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/123—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms polycarboxylic
    • C10M2207/1236—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms 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
    • C10M2207/10—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
    • C10M2207/1256—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 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
    • C10M2207/10—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
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C10M2207/2835—Esters of polyhydroxy 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/18—Containing nitrogen-to-nitrogen bonds, e.g. hydrazine
    • 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
    • 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
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • 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
    • 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 containing a base oil, a thickener, a specific antioxidant and a metal deactivator. Specifically, the present invention relates to a grease composition with an improved lubrication life suitable for use in a rolling bearing under a high temperature condition, and a bearing in which the grease composition is enclosed.
  • Patent Document 1 A grease that improves the lubrication life of a rolling bearing under high-temperature conditions by containing a base oil, a compound having an alkylthiocarbamoyl group in a thickener, and an amine-ketone condensate antioxidant has been proposed ( Patent Document 1).
  • Patent Document 2 There has been proposed a fatigue life improving lubricant in which the fatigue life is improved by adding a compound having an alkylthiocarbamoyl group and a molybdenum compound to the lubricating base material, or further adding an ester compound (see, for example, Patent Document 2).
  • a lubricating oil (b) a lithium salt of an aliphatic monocarboxylic acid having 12 to 24 carbon atoms containing at least one hydroxyl group, a dilithium salt of an aliphatic dicarboxylic acid having 2 to 12 carbon atoms, and At least one compound selected from the group consisting of lithium salts of aliphatic monocarboxylic acids having 12 to 24 carbon atoms, and (c) 3- (N-salicyloyl) amino-1,2,4-triazole and decamethylene-di
  • a lithium grease composition containing at least one compound selected from the group consisting of carboxylic acid-disalicyloyl hydrazide has been proposed (see, for example, Patent Document 4). However, even if the grease composition using these additives is used for a rolling bearing under a high temperature condition, thermal oxidation stability and lubrication life are insufficient, and a product satisfying the user has not yet been obtained. Is the current situation.
  • JP 2007-238755 A Japanese Patent Publication No.03-31760 JP 2005-509732 A Japanese Patent No. 2936084
  • An object of the present invention is to provide a grease composition that is suitable for a rolling bearing under a high temperature condition and that exhibits stable lubricity for a long period of time. That is, to provide a grease composition having excellent thermal oxidation stability and lubrication life. Another object of the present invention is to provide a bearing in which the grease composition is enclosed.
  • the present invention provides the following grease composition and bearing. [1] (a) base oil, (b) thickener, (c) compound having alkylthiocarbamoyl group represented by formula (1), (d) hindered phenol antioxidant, and (e) metal A grease composition comprising an inactivating agent.
  • R 1 , R 2 , R 3 and R 4 independently represent an alkyl group having 1 to 20 carbon atoms, and X represents S, S—S, S—CH 2 —S, S—CH 2. CH 2 —S or S—CH 2 CH 2 CH 2 —S is shown.
  • X represents S, S—S, S—CH 2 —S, S—CH 2. CH 2 —S or S—CH 2 CH 2 CH 2 —S is shown.
  • [6] Compound having (a) 50% by mass or more of base oil, (b) 1 to 30% by mass of thickener, and (c) alkylthiocarbamoyl group represented by formula (1) with respect to the entire grease composition [1] to [5] containing 0.1 to 10% by mass, (d) 0.1 to 10% by mass of a hindered phenol antioxidant, and (e) 0.1 to 10% by mass of a metal inert.
  • [7] A bearing in which the grease composition according to any one of [1] to [6] is enclosed.
  • the grease composition of the present invention has improved thermal oxidation stability and lubrication life, is suitable for use in rolling bearings under high temperature conditions, and exhibits stable lubricity for a long time. Useful.
  • the grease composition of the present invention also maintains a constant consistency over a long period of time even when used at high temperatures, and does not harden or soften significantly.
  • Base oil Mineral oil, synthetic oil, and mixed oils thereof can be used as the base oil of the grease composition of the present invention.
  • Synthetic oils include ester synthetic oils typified by diesters and polyol esters, poly- ⁇ -olefins, synthetic hydrocarbon oils typified by polybutene, alkyl diphenyl ethers, ether synthetic oils typified by polypropylene glycol, and silicone oils. And fluorinated oils.
  • a mixed oil is preferably used, a mixed oil of two or more kinds of synthetic oils is more preferable, a mixed oil of ester-based synthetic oils is more preferable, and a polyol ester-based synthetic oil and an alkyl diphenyl ether particularly excellent in heat resistance.
  • the kinematic viscosity at 40 ° C. of the base oil is preferably 30 to 300 mm 2 / s. If the kinematic viscosity at 40 ° C. is less than 30 mm 2 / s, it is not preferable because a long life cannot be expected due to a decrease in lubricity due to an increase in evaporation amount and a decrease in oil film thickness. On the other hand, if the kinematic viscosity at 40 ° C. exceeds 300 mm 2 / s, the viscous resistance increases, causing an increase in torque, which is not preferable.
  • the grease composition of the present invention contains (a) a base oil, preferably 50% by mass or more, more preferably 60% by mass or more, based on the entire grease composition.
  • the thickener of the grease composition of the present invention all thickeners can be used. Specifically, soap thickeners represented by lithium soap and composite lithium soap, urea thickeners represented by diurea, inorganic thickeners represented by organoclay and silica, and PTFE And organic thickeners.
  • the composite lithium soap usable in the present invention is preferably composed of a hydroxy fatty acid having 12 to 24 carbon atoms having one or more hydroxyl groups and a lithium salt of a fatty acid dicarboxylic acid having 2 to 12 carbon atoms.
  • the hydroxy fatty acid include 12-hydroxystearic acid, 12-hydroxylauric acid, 16-hydroxypalmitic acid and the like.
  • 12-hydroxystearic acid is preferred.
  • the aliphatic dicarboxylic acid include azelaic acid, sebacic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, speric acid, undecanedioic acid, and dodecanedioic acid.
  • Azelaic acid is most preferred.
  • a soap-based thickener is preferable, and lithium soap and composite lithium soap are more preferable because of excellent heat resistance.
  • the composite lithium soaps 12-hydroxystearic acid and the lithium salt of azelaic acid are most preferred.
  • Lithium soap and composite lithium soap are preferable because they can provide a longer lubrication life than urea compounds when applied to a main motor that requires a cylindrical roller bearing.
  • the grease composition of the present invention contains (b) a thickener, preferably 1 to 30% by mass, more preferably 5 to 20% by mass, based on the entire grease composition. If the amount of the thickener is too large, the grease becomes hard and the stirring resistance may increase. Conversely, if the amount of thickener is too small, the grease may soften and leak.
  • the grease composition of the present invention contains (c) a compound (ATC) having an alkylthiocarbamoyl group represented by the formula (1) and (d) a hindered phenol antioxidant as antioxidants.
  • the grease composition of the present invention further contains (e) a metal deactivator.
  • R 1 , R 2 , R 3 and R 4 each independently represents a linear or branched alkyl group having 1 to 20 carbon atoms, preferably a linear or branched alkyl group having 1 to 8 carbon atoms. .
  • R 1 to R 4 are preferably all the same group.
  • X represents S, S—S, S—CH 2 —S, S—CH 2 CH 2 —S or S—CH 2 CH 2 CH 2 —S. Of these, S—CH 2 —S is preferred.
  • Examples of the compound represented by the formula (1) include bis (dimethylthiocarbamoyl) monosulfide, bis (dimethylcarbamoyl) disulfide, methylenebis (dimethyldithiocarbamate), methylenebis (di-n-butyldithiocarbamate), and the like. Of these, methylenebis (di-n-butyldithiocarbamate) is preferred.
  • the compound having an alkylthiocarbamoyl group represented by the formula (1) (c) is preferably 0.1 to 10% by mass, more preferably 0.8%, based on the entire grease composition. 5 to 5% by mass is contained. When the amount of (c) exceeds 10% by mass, the effect of preventing oxidative degradation is saturated, and when the amount of (c) is less than 0.1% by mass, the effect of addition cannot be obtained.
  • hindered phenol antioxidants examples include 2,6-di-tert-butyl-4-methylphenol, pentaerythritol tetrakis (3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propionate), benzenepropanoic acid, 3,5-bis (1,1-dimethyl-ethyl) -4-hydroxy C7-C9 side chain alkyl ester, and octadecyl-3- (3,5-di-t-butyl-4 -Hydroxyphenyl) propionate and one or more selected from the group consisting of propionate. Of these, 2,6-di-tert-butyl-4-methylphenol is preferred.
  • the grease composition of the present invention contains (d) a hindered phenolic antioxidant, preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, based on the entire grease composition. .
  • a hindered phenolic antioxidant preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, based on the entire grease composition.
  • Examples of the metal deactivator include oxalic acid derivatives, salicylic acid derivatives, hydrazine derivatives, and the like. Specifically, 3- (N-salicyloyl) amino-1,2 represented by the formula (2) , 4-triazole, decamethylenecarboxylic acid disalicyloyl hydrazide (MCSH) represented by formula (3), N, N-bis [3- (3,5-di-t represented by formula (4) -Butyl-4-hydroxyphenyl) propionyl] hydrazine, bis (2-phenoxypropionylhydrazide) isophthalate, N-formyl-N'-salicyloylhydrazine, 2,2-oxamide bis- [ethyl-3- (3,5 -Di-t-butyl-4-hydroxyphenyl) propionate], oxalyl-bis-benzylidene-hydrazide and the like. Of these, decamethylene carboxylic acid dis
  • the grease composition of the present invention contains (e) a metal deactivator, preferably 0.1 to 10% by mass, more preferably 0.1 to 5% by mass, based on the entire grease composition.
  • a metal deactivator preferably 0.1 to 10% by mass, more preferably 0.1 to 5% by mass, based on the entire grease composition.
  • antioxidants other than the antioxidant which is an essential component of the present invention, for example, quinoline antioxidants, amine antioxidants; rust inhibitors; metal corrosion inhibitors; oil agents; antiwear agents; Extreme pressure agents; and solid lubricants.
  • the grease composition of the present invention comprises (a) a base oil of 50% by mass or more, preferably 60% by mass or more, and (b) a thickener 1-30% by mass, preferably 5-20%, based on the entire grease composition. (C) 0.1 to 10% by mass, preferably 0.5 to 5% by mass of a compound having an alkylthiocarbamoyl group represented by the formula (1), (d) a hindered phenol antioxidant It is particularly preferred to contain 1 to 10% by weight, preferably 0.5 to 5% by weight, and (e) a metal deactivator 0.1 to 10% by weight, preferably 0.1 to 5% by weight.
  • the penetration of the grease composition of the present invention is preferably 200 to 400, more preferably 250 to 350. Leakage tends to occur when the penetration level exceeds 400. On the other hand, when the penetration is less than 200, the stirring resistance increases.
  • a rolling bearing particularly a roller bearing, particularly a cylindrical roller bearing is suitable.
  • a bearing used for a fully closed type motor particularly a bearing used for a fully closed type main motor for a railway vehicle is preferable.
  • the material of the bearing is not particularly limited, but is preferably copper.
  • Grease for Test Grease compositions of Examples 1 to 7 and Comparative Examples 1 to 6 were prepared according to the formulation shown in Tables 1 and 2. The amount of each component is mass% based on the total mass of the grease composition.
  • a solution prepared by adding 11.9 g of lithium hydroxide monohydrate to 60 g of water and dissolving it by heating was added thereto, and saponification reaction of azelaic acid was performed with vigorous stirring. About 60 minutes later, it was confirmed by infrared spectroscopy that no unreacted fatty acid was observed, and the saponification reaction was terminated.
  • the heating process was started and the contents were gradually heated to 200 ° C. When the temperature reached 200 ° C., the remaining base oil (400.2 g) was added and cooled to room temperature as it was, and a three-stage roll was passed twice to obtain a lithium complex grease. The final content was 1000 g.
  • Base oils include ether oil (alkyl diphenyl ether: kinematic viscosity 40 ° C 100mm 2 / s, 100 ° C 12.5mm 2 / s) and ester oil (pentaerythritol ester: kinematic viscosity 40 ° C 102mm 2 / s, 100 ° C 12.9mm 2 / s) and a 1: 1 mixture (mass ratio) was used (kinematic viscosity 40 ° C. 101 mm 2 / s).
  • Examples 1 to 7 containing the components (a) to (e) were excellent in thermal oxidation stability with little change in the total acid number, achieved all the standards for bearing lubrication life, and passed the overall evaluation.
  • Comparative Examples 1, 2, and 3 that do not contain (d), (c), and (e) of Example 1 have a large change in total acid value, inferior thermal oxidation stability, and a short bearing lubrication life. It took.
  • Comparative Examples 4 and 5 containing a quinoline antioxidant and an amine antioxidant, respectively have a large change in total acid value, and are inferior in thermal oxidation stability.
  • the bearing lubrication life was also short.
  • Comparative Example 6 containing a quinoline-based antioxidant and an amine-based antioxidant instead of (d) in Example 1, the change in the total acid value is similarly large, and the thermal oxidation stability is inferior. The lubrication life was also short.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Lubricants (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

La présente invention concerne une composition de graisse qui contient (a) une huile de base, (b) un agent épaississant, (c) un composé représenté par la formule (1) et comprenant un groupe alkylthiocarbamoyle, (d) un antioxydant de type phénol encombré et (e) un agent de désactivation de métal. (Dans la formule (1), R1, R2, R3 et R4 représentent chacun indépendamment un groupe alkyle comprenant de 1 à 20 atomes de carbone ; et X représente S, S-S, S-CH2-S, S-CH2CH2-S ou S-CH2CH2CH2-S).
PCT/JP2013/050968 2012-01-18 2013-01-18 Composition de graisse et roulement WO2013108887A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112013000604.9T DE112013000604B4 (de) 2012-01-18 2013-01-18 Schmiermittelzusammensetzung und dessen Verwendung für Lager
CN201380005510.1A CN104053757A (zh) 2012-01-18 2013-01-18 润滑脂组合物及轴承
US14/363,913 US20140336090A1 (en) 2012-01-18 2013-01-18 Grease composition and bearing

Applications Claiming Priority (2)

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JP2012008027A JP5872300B2 (ja) 2012-01-18 2012-01-18 グリース組成物及び軸受
JP2012-008027 2012-01-18

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JP6646379B2 (ja) * 2015-08-10 2020-02-14 Ntn株式会社 グリース組成物およびグリース封入転がり軸受
JP6845633B2 (ja) * 2016-08-04 2021-03-17 協同油脂株式会社 グリース組成物
WO2023201327A1 (fr) * 2022-04-15 2023-10-19 Vgp Ipco Llc Graisse pour véhicule électrique

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JPS5911397A (ja) * 1982-06-09 1984-01-20 Idemitsu Kosan Co Ltd 疲労寿命改良潤滑剤
JPS63162791A (ja) * 1986-12-26 1988-07-06 Kyodo Yushi Kk グリ−ス組成物
US4880551A (en) * 1988-06-06 1989-11-14 R. T. Vanderbilt Company, Inc. Antioxidant synergists for lubricating compositions
JPH0586392A (ja) * 1991-09-26 1993-04-06 Kyodo Yushi Kk リチウムグリース組成物
JPH08188790A (ja) * 1995-01-13 1996-07-23 Hitachi Ltd 潤滑油組成物及びグリース組成物
JPH11116981A (ja) * 1997-10-21 1999-04-27 Nippon Oil Co Ltd 転がり軸受用グリース組成物
JP2007099856A (ja) * 2005-10-03 2007-04-19 Nsk Ltd 耐水性グリース組成物、並びにウォータポンプ用転がり軸受、波力発電機用転がり軸受及び浚渫機用転がり軸受
JP2007238755A (ja) * 2006-03-08 2007-09-20 Kyodo Yushi Co Ltd グリース組成物及び軸受

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US2647824A (en) * 1949-01-26 1953-08-04 Standard Oil Dev Co Stabilized compositions containing hydrogenated quinolines with oxidation inhibitors
EP0072349B1 (fr) * 1981-08-10 1987-05-13 Ciba-Geigy Ag Tétrahydroquinoline comme agent anti-oxydant pour lubrifiant
US6726855B1 (en) * 1998-12-02 2004-04-27 Uniroyal Chemical Company, Inc. Lubricant compositions comprising multiple antioxidants
US6235686B1 (en) * 2000-08-16 2001-05-22 R.T. Vanderbilt Company, Inc. Lubricating compositions containing aromatized 1,2-dihydro-2,2,4-trimethylquinoline polymers
WO2003044139A1 (fr) 2001-11-19 2003-05-30 R.T. Vanderbilt Company, Inc. Compositions ameliorees d'additifs antioxydants, anti-usure/extreme pression et compositions lubrifiantes contenant celles-ci
JP4982059B2 (ja) 2005-08-12 2012-07-25 出光興産株式会社 潤滑油組成物及びそれを用いた含浸軸受

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JPS5911397A (ja) * 1982-06-09 1984-01-20 Idemitsu Kosan Co Ltd 疲労寿命改良潤滑剤
JPS63162791A (ja) * 1986-12-26 1988-07-06 Kyodo Yushi Kk グリ−ス組成物
US4880551A (en) * 1988-06-06 1989-11-14 R. T. Vanderbilt Company, Inc. Antioxidant synergists for lubricating compositions
JPH0586392A (ja) * 1991-09-26 1993-04-06 Kyodo Yushi Kk リチウムグリース組成物
JPH08188790A (ja) * 1995-01-13 1996-07-23 Hitachi Ltd 潤滑油組成物及びグリース組成物
JPH11116981A (ja) * 1997-10-21 1999-04-27 Nippon Oil Co Ltd 転がり軸受用グリース組成物
JP2007099856A (ja) * 2005-10-03 2007-04-19 Nsk Ltd 耐水性グリース組成物、並びにウォータポンプ用転がり軸受、波力発電機用転がり軸受及び浚渫機用転がり軸受
JP2007238755A (ja) * 2006-03-08 2007-09-20 Kyodo Yushi Co Ltd グリース組成物及び軸受

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DE112013000604T8 (de) 2014-12-31
JP5872300B2 (ja) 2016-03-01
DE112013000604T5 (de) 2014-10-23
CN104053757A (zh) 2014-09-17
JP2013147548A (ja) 2013-08-01
DE112013000604B4 (de) 2022-03-24
US20140336090A1 (en) 2014-11-13

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