WO2018030090A1 - 潤滑グリース組成物 - Google Patents

潤滑グリース組成物 Download PDF

Info

Publication number
WO2018030090A1
WO2018030090A1 PCT/JP2017/026102 JP2017026102W WO2018030090A1 WO 2018030090 A1 WO2018030090 A1 WO 2018030090A1 JP 2017026102 W JP2017026102 W JP 2017026102W WO 2018030090 A1 WO2018030090 A1 WO 2018030090A1
Authority
WO
WIPO (PCT)
Prior art keywords
lubricating grease
grease composition
calcium carbonate
base oil
oil
Prior art date
Application number
PCT/JP2017/026102
Other languages
English (en)
French (fr)
Inventor
渉 澤口
孝平 松本
Original Assignee
Nokクリューバー株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nokクリューバー株式会社 filed Critical Nokクリューバー株式会社
Priority to JP2018532896A priority Critical patent/JP7105693B2/ja
Priority to DE112017003959.2T priority patent/DE112017003959B4/de
Priority to CN201780047237.7A priority patent/CN109563429A/zh
Publication of WO2018030090A1 publication Critical patent/WO2018030090A1/ja
Priority to US16/269,890 priority patent/US10899990B2/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00Lubricating 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
    • C10M169/02Mixtures of base-materials and thickeners
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M101/00Lubricating compositions characterised by the base-material being a mineral or fatty oil
    • C10M101/02Petroleum fractions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/02Hydrocarbon polymers; Hydrocarbon polymers modified by oxidation
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M117/00Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M125/00Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/10Metal oxides, hydroxides, carbonates or bicarbonates
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00Lubricating 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
    • C10M169/06Mixtures of thickeners and additives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M105/00Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/02Well-defined hydrocarbons
    • C10M105/04Well-defined hydrocarbons aliphatic
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M117/00Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06Metal compounds
    • C10M2201/062Oxides; Hydroxides; Carbonates or bicarbonates
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06Metal compounds
    • C10M2201/062Oxides; Hydroxides; Carbonates or bicarbonates
    • C10M2201/0623Oxides; Hydroxides; Carbonates or bicarbonates used as base material
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/12Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/1206Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms used as thickening agents
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/12Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125Carboxylix 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
    • C10M2207/1256Carboxylix 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
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/12Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125Carboxylix 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
    • C10M2207/126Carboxylix 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 monocarboxylic
    • C10M2207/1265Carboxylix 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 monocarboxylic used as thickening agent
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10Carboxylix acids; Neutral salts thereof
    • C10M2207/12Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125Carboxylix 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
    • C10M2207/128Carboxylix 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
    • C10M2207/1285Carboxylix 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
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/02Groups 1 or 11
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00Metal present as such or in compounds
    • C10N2010/04Groups 2 or 12
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01Physico-chemical properties
    • C10N2020/02Viscosity; Viscosity index
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01Physico-chemical properties
    • C10N2020/055Particles related characteristics
    • C10N2020/06Particles of special shape or size
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/02Bearings
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10Semi-solids; greasy

Definitions

  • the present invention relates to lubricating grease compositions having a high coefficient of static friction while maintaining excellent low temperature torque properties, high temperature shear stability and high temperature oil separation properties.
  • grease is used as a lubricant used for gears and sliding parts.
  • resin members are often used in gears and sliding parts for the purpose of weight reduction and cost reduction in automobile parts, home appliances, electronic information devices, OA devices and the like.
  • grease used for sliding parts between resin members or between a resin member and a metal member is required to be excellent in low temperature torque characteristics, high temperature shear stability and high temperature oil separation characteristics.
  • grease is also required to have a high static friction coefficient.
  • the present applicant has proposed a lubricating grease composition to be used for sliding parts of resin members or between a resin member and a metal member in Patent Document 1.
  • the lubricating grease composition disclosed in Patent Document 1 was developed as a lubricating grease composition having both a lubricating function (having a low coefficient of dynamic friction) and a stationary function (having a high coefficient of static friction), the coefficient of static friction is 0 As small as about .07, there was room for improvement. In addition, it has not been developed in consideration of low temperature torque characteristics, high temperature shear stability and high temperature oil separation characteristics.
  • the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a lubricating grease composition having a high static friction coefficient while maintaining excellent low temperature torque characteristics, high temperature shear stability and high temperature oil separation characteristics. To aim.
  • the lubricating grease composition of the present invention is a lubricating grease composition comprising a base oil, a thickener and a solid lubricant, wherein the solid lubricant is calcium carbonate, and the blending amount of the calcium carbonate There is from 1 to 60 wt% based on the total weight of the lubricating grease composition, the average particle diameter of the calcium carbonate is the 0.1 ⁇ 30 [mu] m, 18 in kinematic viscosity 40 ° C. of the base oil ⁇ 300 mm 2 / S, characterized in that the worked penetration is 240 to 320.
  • the base oil is at least one of a mineral oil and a synthetic hydrocarbon oil.
  • the said thickener is at least 1 sort (s) of a metal soap type compound and a composite metal soap type compound.
  • the lubricating grease composition of the present invention has a high coefficient of static friction while maintaining excellent low temperature torque properties, high temperature shear stability and high temperature oil separation properties.
  • it is suitable for use in sliding parts of resin members or between resin members and metal members.
  • the lubricating grease composition according to the present invention comprises a base oil, a thickener and a solid lubricant.
  • the base oil used in the present invention is not particularly limited, and examples thereof include mineral oil and synthetic hydrocarbon oil.
  • the base oils may be used alone or in combination.
  • Examples of the mineral oil include paraffinic hydrocarbons, naphthenic hydrocarbons, aromatic hydrocarbons and olefinic hydrocarbons.
  • Examples of synthetic hydrocarbon oils include poly ⁇ -olefins, ethylene / ⁇ -olefin copolymers, polybutenes, alkyl benzenes, alkyl naphthalenes and the like. Among these, poly ⁇ -olefins are preferred.
  • the kinematic viscosity of the base oil is 18 to 300 mm 2 / s at 40 ° C.
  • the kinematic viscosity of the base oil is less than 18 mm 2 / s at 40 ° C.
  • the high temperature oil separation property is degraded.
  • the kinematic viscosity of the base oil exceeds 300 mm 2 / s at 40 ° C.
  • the low temperature torque characteristic is inferior and the sliding does not occur smoothly in a low temperature environment.
  • the kinematic viscosity of the base oil can be measured in accordance with JIS K 2283.
  • the thickener used for this invention is not specifically limited, For example, a metal soap type compound and a composite metal soap type compound are mentioned.
  • the thickeners may be used alone or in combination.
  • the metal soap compound include Li soap, Ca soap and aluminum soap. Among these, Li soap is preferable.
  • the Li soap include lithium salts of aliphatic monocarboxylic acids having 12 to 24 carbon atoms, lithium salts of aliphatic monocarboxylic acids having 12 to 24 carbon atoms having at least one hydroxy group, and stearic acid. Lithium salts and lithium 12-hydroxystearate are particularly preferred.
  • Li complex soaps examples include lithium salts of aliphatic monocarboxylic acids and aliphatic dicarboxylic acids, and lithium salts of two or more aliphatic monocarboxylic acids.
  • Li complex soaps examples include salts of aliphatic dicarboxylic acids and carboxylic acid amides.
  • the solid lubricant used in the present invention is calcium carbonate.
  • the content of calcium carbonate is 1 to 60% by weight based on the total weight of the lubricating grease composition.
  • the compounding amount of calcium carbonate is less than 1% by weight with respect to the total weight of the lubricating grease composition, the static friction coefficient of the lubricating grease composition is small, and in sliding parts between resin members or between resin members and metal members. When used, it can not prevent slippage at rest.
  • the compounding amount of calcium carbonate exceeds 60% by weight with respect to the total weight of the lubricating grease composition, the lubricating grease composition becomes too hard and the low temperature torque characteristics deteriorate.
  • the average particle size of calcium carbonate is 0.1 to 30 ⁇ m.
  • the average particle diameter of calcium carbonate is less than 0.1 ⁇ m, the coefficient of static friction of the lubricating grease composition is small, and when it is used for sliding parts of resin members or between resin members and metal members, It can not be prevented.
  • the average particle size of calcium carbonate exceeds 30 ⁇ m, calcium carbonate can not be dispersed uniformly in the lubricating grease composition, the worked penetration becomes high, and the high-temperature oil separation property decreases.
  • the lubricating grease composition according to the present invention has a worked penetration of 240 to 320. If the worked penetration is less than 240, the low temperature torque characteristics will be poor, and it will not slide smoothly in a low temperature environment. On the other hand, when the worked penetration exceeds 320, the high-temperature oil separation characteristics are degraded.
  • the worked penetration can be measured according to the measurement method defined in JIS K 22207.
  • the lubricating grease composition according to the present invention may contain an additive as long as the effect is not affected.
  • an additive for example, known antioxidants, extreme pressure agents, rust inhibitors, corrosion inhibitors, viscosity index improvers and the like can be appropriately selected and contained.
  • antioxidants examples include phenol-based antioxidants such as 2,6-di-tert-butyl-4-methylphenol, 4,4'-methylenebis (2,6-di-tert-butylphenol), alkyl diphenylamine, triphenyl And amine antioxidants such as amines, phenyl- ⁇ -naphthylamines, phenothiazines, alkylated phenyl- ⁇ -naphthylamines, alkylated phenothiazines, and further, phosphoric acid based antioxidants, sulfur based antioxidants and the like.
  • phenol-based antioxidants such as 2,6-di-tert-butyl-4-methylphenol, 4,4'-methylenebis (2,6-di-tert-butylphenol), alkyl diphenylamine, triphenyl And amine antioxidants such as amines, phenyl- ⁇ -naphthylamines, phenothiazines, alky
  • phosphorus compounds such as phosphoric acid ester, phosphorous acid ester, phosphoric acid ester amine salt, sulfur compounds such as sulfides and disulfides, metal salts of dialkyl dithiophosphates, metal salts of dialkyl dithiocarbamates, etc.
  • sulfur based metal salts, chlorinated paraffins, chlorinated compounds such as chlorinated diphenyl and the like can be mentioned.
  • rust inhibitor examples include fatty acids, fatty acid amines, metal sulfonates, metal salts of alkyl sulfonates, amine salts of alkyl sulfonates, oxidized paraffins, polyoxyethylene alkyl ethers, and the like.
  • corrosion inhibitor examples include benzotriazole, benzimidazole, thiadiazole, sodium sebacate and the like.
  • viscosity index improver examples include polymethacrylates, ethylene-propylene copolymers, polyisobutylenes, polyalkylstyrenes and hydrogenated styrene-isoprene copolymers.
  • the lubricating grease composition according to the present invention contains a base oil, a thickener and a solid lubricant, the solid lubricant is calcium carbonate, and the blending amount of calcium carbonate is the total weight of the lubricating grease composition.
  • the average particle diameter of calcium carbonate is 0.1 to 30 ⁇ m
  • the base oil has a kinematic viscosity of 18 to 300 mm 2 / s at 40 ° C., and a worked penetration of 240 to By being 320, it has a high coefficient of static friction while maintaining excellent low temperature torque properties, high temperature shear stability and high temperature oil separation properties. In particular, it is suitable for use in sliding parts of resin members or between resin members and metal members.
  • Lubricating Grease Composition A lubricating grease composition (sample oil) was prepared so that each component shown below had the compounding amount (% by weight) shown in Table 1 and Table 2.
  • Poly ⁇ -olefin A Product name “DURASYN 164” (manufactured by Ineos Oligomers Japan, 40 ° C. dynamic viscosity 18 mm 2 / s)
  • Poly ⁇ -olefin B Product name “DURASYN 166” (manufactured by Ineos Oligomers Japan, 40 ° C. kinematic viscosity 30 mm 2 / s)
  • Poly ⁇ -olefin C Product name “DURASYN 174” (manufactured by Ineos Oligomers Japan, 40 ° C.
  • a sample oil containing thickener A in preparation of a sample oil containing thickener A, first, base oil, 12-hydroxystearic acid and lithium hydroxide were added to a mixing and stirring vessel. The blending amount of 12-hydroxystearic acid and lithium hydroxide was adjusted to be 88% by weight of 12-hydroxystearic acid and 12% by weight of lithium hydroxide based on the total amount of thickener. The mixture was stirred while heating at about 80 to 130 ° C. to perform a saponification reaction. After carrying out the saponification reaction, it was heated to 200 ° C. and then cooled. The remaining components were added to the formed gel-like substance and stirred, and then kneaded using a roll mill or a high-pressure homogenizer to obtain a sample oil.
  • a base oil, sebacic acid and sebacic acid monostearylamide were added to a mixing and stirring vessel and stirred while heating at about 80 to 200 ° C.
  • Barium hydroxide was added to carry out a saponification reaction.
  • the combined amounts of sebacic acid, sebacic acid monostearylamide and barium hydroxide are 27.5% by weight of sebacic acid, 41.5% by weight of sebacic acid monostearylamide, 31% by weight of barium hydroxide with respect to the total amount of thickener. Adjusted to be a percentage. It cooled after performing saponification reaction. The remaining components were added to the formed gel-like substance and stirred, and then kneaded using a roll mill or a high-pressure homogenizer to obtain a sample oil.
  • the base oil, 12-hydroxystearic acid and lithium hydroxide were added to the mixing and stirring vessel.
  • the mixture was stirred while heating at about 80 to 130 ° C. to perform a saponification reaction.
  • Azelaic acid was added, and the mixture was stirred while heating at 80 to 200 ° C. to perform a saponification reaction again.
  • the blending amounts of 12-hydroxystearic acid, azelaic acid and lithium hydroxide are 63.5% by weight of 12-hydroxystearic acid, 19% by weight of azelaic acid and 17.5% by weight of lithium hydroxide based on the total amount of thickener. Adjusted to be a percentage. It cooled after performing saponification reaction. The remaining components were added to the formed gel-like substance and stirred, and then kneaded using a roll mill or a high-pressure homogenizer to obtain a sample oil.
  • Shear viscosity was measured with a rheometer (manufactured by Anton Paar) at a measurement temperature of 100 ° C. The viscosity when the shear viscosity, the angle 2 between ° cone and plate sandwiched sample oil, gradually increased shear rate from 0 s -1 to 600s -1, shear rate 600s -1 It is.
  • the blending amount of calcium carbonate is 1 to 60% by weight with respect to the total weight of the lubricating grease composition, and the average particle diameter of calcium carbonate is 0.1 to 30 ⁇ m.
  • the base oil has a kinematic viscosity of 18 to 300 mm 2 / s at 40 ° C. and a worked penetration of 240 to 320, it has excellent low temperature torque characteristics, high temperature shear stability and high temperature oil separation characteristics, and high static friction. It was found to have coefficients.
  • Comparative Example 1 since the average particle diameter of calcium carbonate is less than 0.1 ⁇ m, the static friction coefficient was as low as 0.12.
  • Comparative Example 2 since the average particle size of calcium carbonate is larger than 30 ⁇ m, the oil separation degree is as high as 4.3% by weight, the shear viscosity is as low as 800 mPa ⁇ s, and the high temperature oil separation property and the high temperature shear stability are inferior. I understand.
  • Comparative Example 3 since the blending amount of calcium carbonate is less than 1% by weight based on the total weight of the lubricating grease composition, the static friction coefficient was as low as 0.12.
  • Comparative Example 4 it was found that the low temperature torque was as high as 70 N ⁇ cm and the low temperature torque characteristics were inferior because the compounding amount of calcium carbonate was more than 60% by weight with respect to the total weight of the lubricating grease composition.
  • Comparative Example 5 since the thickener was not contained, the shear viscosity was as low as 100 mPa ⁇ s, resulting in poor high-temperature shear stability.
  • Comparative Example 6 the static friction coefficient was as low as 0.07 because PTFE and MCA were contained instead of calcium carbonate. Further, in Comparative Example 7, in the same manner as Comparative Example 6, PTFE and MCA were contained instead of calcium carbonate, and the blending amount of PTFE and MCA was further increased, so the worked consistency decreased.
  • the low temperature torque was as high as 50 N ⁇ cm, the low temperature torque characteristics were inferior, and the static friction coefficient was as low as 0.12.
  • Comparative Example 8 since the worked penetration was larger than 320, the oil separation degree was as high as 5.5% by weight, and it was found that the high-temperature oil separation property was inferior.
  • Comparative Example 9 since the worked penetration was less than 240, the low temperature torque was as high as 60 N ⁇ cm, and it was found that the low temperature torque characteristics were inferior.
  • Comparative Example 10 since the kinematic viscosity of the base oil was higher than 300 mm 2 / s at 40 ° C., it was found that the low temperature torque was as high as 95 N ⁇ cm, and the low temperature torque characteristics were inferior.
  • Comparative Example 11 since the kinematic viscosity of the base oil was lower than 18 mm 2 / s at 40 ° C., the oil separation degree was as high as 5.7% by weight, and it was found that the high-temperature oil separation characteristics were inferior. In Comparative Example 12, it is found that the oil separation degree is as high as 6.5% by weight, the shear viscosity is as low as 80 mPa ⁇ s, and the high-temperature oil separation characteristics and the high-temperature shear stability are inferior since no thickener is contained.
  • Comparative Example 12 it is found that the oil separation degree is as high as 6.5% by weight, the shear viscosity is as low as 80 mPa ⁇ s, and the high-temperature oil separation characteristics and the high-temperature shear stability are inferior since no thickener is contained.
  • the lubricating grease composition according to the present invention is a lubricating grease composition comprising a base oil, a thickener and a solid lubricant, wherein the solid lubricant is calcium carbonate and calcium carbonate amount the lubricating 1 to 60 wt% based on the total weight of the grease composition, the average particle diameter of calcium carbonate is the 0.1 ⁇ 30 [mu] m, 18 ⁇ in the kinematic viscosity of the base oil is 40 ° C. 300 mm 2 / S, with a worked penetration of 240 to 320, has a high coefficient of static friction while maintaining excellent low temperature torque properties, high temperature shear stability and high temperature oil separation properties.
  • the lubricating grease composition according to the present invention is particularly suitable for use in sliding parts between resin members or between resin members and metal members, it is applied to devices and parts in various industrial fields. can do.
  • parts for office equipment such as copying machines and printers, reduction gears and speed-up gears, power transmission devices such as gears, chains and motors, traveling parts, braking parts such as ABS, steering parts, and transmissions Drive system parts such as machines, automotive reinforcing parts such as power window motors, power seat motors, sunroof motors, electronic information devices, hinge parts such as mobile phones, food and medicine industry, steel, construction, glass industry, cement industry, films
  • bearings such as rolling bearings, thrust bearings, dynamic pressure bearings, resin bearings, linear motion devices, and the like.

Landscapes

  • 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)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

本発明の目的は、優れた低温トルク特性、高温剪断安定性および高温離油特性を維持しつつ、高い静摩擦係数を有する潤滑グリース組成物を提供することである。 本発明の潤滑グリース組成物は、基油と、増ちょう剤と、固体潤滑剤とを含有する潤滑グリース組成物であって、前記固体潤滑剤が、炭酸カルシウムであり、前記炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1~60重量%であり、前記炭酸カルシウムの平均粒子径が0.1~30μmであり、前記基油の動粘度が40℃で18~300mm/sであり、混和ちょう度が240~320であることを特徴とする。

Description

潤滑グリース組成物
 本発明は、優れた低温トルク特性、高温剪断安定性および高温離油特性を維持しつつ、高い静摩擦係数を有する潤滑グリース組成物に関する。
 従来より、歯車および摺動部に使用される潤滑剤としてグリースが使用されている。近年、自動車部品、家電製品、電子情報機器、OA機器等では、軽量化、低コスト化を目的として、歯車および摺動部に樹脂部材が使用されることが多くなってきている。その中で、樹脂部材同士、又は、樹脂部材と金属部材との摺動部分に使用されるグリースには、低温トルク特性、高温剪断安定性および高温離油特性に優れることが要求されている。また近年、自動車やOA機器の減速装置内の減速ギア部等において、静止時のすべり防止のため、グリースには高い静摩擦係数を有することも要求されている。
 例えば、本出願人は、特許文献1において、樹脂部材同士または樹脂部材と金属部材との摺動部分に用いる潤滑グリース組成物を提案した。
特開2009-13351号公報
 しかしながら、特許文献1に開示されている潤滑グリース組成物は、潤滑機能(動摩擦係数が低いこと)と共に静止機能(静摩擦係数が高いこと)を併せ持つ潤滑グリース組成物として開発したものの、静摩擦係数が0.07程度と小さく、改良の余地があった。また、低温トルク特性、高温剪断安定性および高温離油特性を考慮して開発したものではない。
 そこで、本発明は上記事情に鑑みてなされたものであり、優れた低温トルク特性、高温剪断安定性および高温離油特性を維持しつつ、高い静摩擦係数を有する潤滑グリース組成物を提供することを目的とする。
 本発明の潤滑グリース組成物は、基油と、増ちょう剤と、固体潤滑剤とを含有する潤滑グリース組成物であって、前記固体潤滑剤が、炭酸カルシウムであり、前記炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1~60重量%であり、前記炭酸カルシウムの平均粒子径が0.1~30μmであり、前記基油の動粘度が40℃で18~300mm/sであり、混和ちょう度が240~320であることを特徴とする。
 前記基油が、鉱油および合成炭化水素油の少なくとも1種であることが好ましい。
 前記増ちょう剤が、金属石けん系化合物および複合金属石けん系化合物の少なくとも1種であることが好ましい。
 また、樹脂部材同士、又は、樹脂部材と金属部材との摺動部分に使用されることが好ましい。
 本発明の潤滑グリース組成物は、優れた低温トルク特性、高温剪断安定性および高温離油特性を維持しつつ、高い静摩擦係数を有する。特に、樹脂部材同士、又は、樹脂部材と金属部材との摺動部分に使用するのに適している。
 本発明に係る潤滑グリース組成物は、基油と、増ちょう剤と、固体潤滑剤を含有する。
 本発明に用いられる基油は特に限定されないが、例えば、鉱油、合成炭化水素油が挙げられる。基油は、それぞれ単独で用いてもよいし、混合して用いてもよい。鉱油としては、例えば、パラフィン系炭化水素、ナフテン系炭化水素、芳香族系炭化水素、オレフィン系炭化水素が挙げられる。合成炭化水素油としては、例えば、ポリα-オレフィン、エチレン・α-オレフィン共重合体、ポリブテン、アルキルベンゼン、アルキルナフタレン等が挙げられる。この中では、ポリα-オレフィンが好ましい。
 基油の動粘度は、40℃で18~300mm/sである。基油の動粘度が40℃で18mm/s未満であると、高温離油特性が低下する。一方、基油の動粘度が40℃で300mm/sを超えると、低温トルク特性が劣り、低温環境下でスムーズに摺動しなくなる。なお、基油の動粘度は、JIS K 2283に準拠して測定することができる。
 本発明に用いられる増ちょう剤は特に限定されないが、例えば、金属石けん系化合物、複合金属石けん系化合物が挙げられる。増ちょう剤は、それぞれ単独で用いてもよいし、混合して用いてもよい。金属石けん系化合物としては、Li石けん、Ca石けん、アルミニウム石けんが挙げられるが、この中ではLi石けんが好ましい。Li石けんとしては、例えば、炭素数12~24の脂肪族モノカルボン酸のリチウム塩、少なくとも1個のヒドロキシ基を有する炭素数12~24の脂肪族モノカルボン酸のリチウム塩が挙げられ、ステアリン酸リチウム塩や12-ヒドロキシステアリン酸リチウム塩が特に好ましい。また、複合金属石けん系化合物としては、Li複合石けん、Ca複合石けん、Ba複合石けんが挙げられるが、この中では、Li複合石けん、Ba複合石けんが好ましい。Li複合石けんとしては、例えば、脂肪族モノカルボン酸と脂肪族ジカルボン酸とのリチウム塩、2種以上の脂肪族モノカルボン酸のリチウム塩が挙げられる。Ba複合石けんとしては、例えば、脂肪族ジカルボン酸とカルボン酸アミドとの塩が挙げられる。
 本発明に用いられる固体潤滑剤は、炭酸カルシウムである。炭酸カルシウムの配合量は潤滑グリース組成物の重量全体に対して1~60重量%である。炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1重量%未満であると、潤滑グリース組成物の静摩擦係数が小さく、樹脂部材同士又は樹脂部材と金属部材との摺動部分に使用した場合に、静止時のすべりを防止することができない。一方、炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して60重量%を超えると、潤滑グリース組成物が硬くなり過ぎて、低温トルク特性が低下する。また、炭酸カルシウムの平均粒子径は0.1~30μmである。炭酸カルシウムの平均粒子径が0.1μm未満であると、潤滑グリース組成物の静摩擦係数が小さく、樹脂部材同士又は樹脂部材と金属部材との摺動部分に使用した場合に、静止時のすべりを防止することができない。一方、炭酸カルシウムの平均粒子径が30μmを超えると、潤滑グリース組成物中に炭酸カルシウムが均一に分散できず、混和ちょう度が高くなり、高温離油特性が低下する。
 本発明に係る潤滑グリース組成物は、混和ちょう度が240~320である。混和ちょう度が240未満であると、低温トルク特性が劣り、低温環境下でスムーズに摺動しなくなる。一方、混和ちょう度が320を超えると、高温離油特性が低下する。なお、混和ちょう度は、JIS K 2220 7に規定された測定方法に従い測定することができる。
 本発明に係る潤滑グリース組成物は、その効果に影響を与えない範囲で添加剤を含有していてもよい。例えば、公知の酸化防止剤、極圧剤、防錆剤、腐食防止剤、粘度指数向上剤等を適宜選択して含有させることができる。
 酸化防止剤としては、例えば2,6-ジ第3ブチル-4-メチルフェノール、4,4′-メチレンビス(2,6-ジ第3ブチルフェノール)等のフェノール系酸化防止剤、アルキルジフェニルアミン、トリフェニルアミン、フェニル-α-ナフチルアミン、フェノチアジン、アルキル化フェニル-α-ナフチルアミン、アルキル化フェノチアジン等のアミン系酸化防止剤、さらにはリン酸系酸化防止剤、硫黄系酸化防止剤等が挙げられる。
 極圧剤としては、例えばリン酸エステル、亜リン酸エステル、リン酸エステルアミン塩等のリン系化合物、スルフィド類、ジスルフィド類等の硫黄化合物、ジアルキルジチオリン酸金属塩、ジアルキルジチオカルバミン酸金属塩等の硫黄系金属塩、塩素化パラフィン、塩素化ジフェニル等の塩素化合物などが挙げられる。
 防錆剤としては、例えば脂肪酸、脂肪酸アミン、金属スルホネート、アルキルスルホン酸金属塩、アルキルスルホン酸アミン塩、酸化パラフィン、ポリオキシエチレンアルキルエーテル等が挙げられる。
 腐食防止剤としては、例えばベンゾトリアゾール、ベンゾイミダゾール、チアジアゾール、セバシン酸ナトリウム等が挙げられる。
 粘度指数向上剤としては、ポリメタクリレート、エチレン-プロピレン共重合体、ポリイソブチレン、ポリアルキルスチレン、スチレン-イソプレン共重合体水素化物等が挙げられる。
 本発明に係る潤滑グリース組成物は、基油と、増ちょう剤と、固体潤滑剤とを含有し、固体潤滑剤が炭酸カルシウムであり、炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1~60重量%であり、炭酸カルシウムの平均粒子径が0.1~30μmであり、基油は、40℃動粘度が18~300mm/sであり、混和ちょう度が240~320であることにより、優れた低温トルク特性、高温剪断安定性および高温離油特性を維持しつつ、高い静摩擦係数を有する。特に、樹脂部材同士、又は、樹脂部材と金属部材との摺動部分に使用するのに適している。
 以下、実施例及び比較例に基づいて、本発明の好適な実施の形態を具体的に説明するが、本発明はこれら実施例に限定されるものではない。
(1)潤滑グリース組成物の調製方法
 以下の各成分が表1及び表2で示す配合量(重量%)になるよう、潤滑グリース組成物(試料油)を調製した。
<基油>
 ポリα-オレフィンA:製品名「DURASYN164」(イネオスオリゴマーズジャパン社製、40℃動粘度18mm/s)
 ポリα-オレフィンB:製品名「DURASYN166」(イネオスオリゴマーズジャパン社製、40℃動粘度30mm/s)
 ポリα-オレフィンC:製品名「DURASYN174」(イネオスオリゴマーズジャパン社製、40℃動粘度390mm/s)
 ポリα-オレフィンD:製品名「DURASYN162」(イネオスオリゴマーズジャパン社製、40℃動粘度5mm/s)
<増ちょう剤>
 増ちょう剤A:Li石けん(12-ヒドロキシステアリン酸リチウム塩)
 増ちょう剤B:Ba複合石けん(セバシン酸とカルボン酸モノステアリルアミドのバリウム塩)
 増ちょう剤C:Li複合石けん(12-ヒドロキシステアリン酸とアゼライン酸のリチウム塩)
<固体潤滑剤>
 炭酸カルシウムA:製品名「#2000」(三共精粉社製、平均粒子径1.8μm)
 炭酸カルシウムB:製品名「#200」(三共精粉社製、平均粒子径4.0μm)
 炭酸カルシウムC:製品名「一級」(三共精粉社製、平均粒子径20μm)
 炭酸カルシウムD:製品名「SFT-2000」(三共精粉社製、平均粒子径30μm)
 炭酸カルシウムE:製品名「白艶華CC」(白石カルシウム社製、平均粒子径0.05μm)
 炭酸カルシウムF:製品名「G-120」(三共精粉社製、平均粒子径50μm)
 炭酸カルシウムG:製品名「カルシテックVIGOT-10」(白石カルシウム社製、平均粒子径0.1μm)
 ポリエチレンワックス:製品名「CERAFLOUR929」(ビックケミ-社製)
 ポリテトラフルオロエチレン(表中「PTFE」):製品名「ダイニオンTF9207Z」(住友スリーエム社製)
 メラミンシアヌレート(表中「MCA」):製品名「MC-6000」(日産化学社製)
 なお、三共精粉社製の炭酸カルシウムの平均粒子径は、島津製作所社製SALD-2200(レーザー回折式、湿式)で測定した値である。また、白石カルシウム社製の炭酸カルシウムの平均粒子径は、Malvern社製マスターサイザー3000(レーザー回折式、湿式)で測定した値である。
<酸化防止剤>
 フェニルナフチルアミン:製品名「VANLUBE81」(三洋化成工業社製)
<防錆剤>
 中性カルシウムスルホネート:製品名「NA-SUL CA-1089」(KING社製)
 具体的に、増ちょう剤Aを含有する試料油の調製において、まず、基油と12-ヒドロキシステアリン酸と水酸化リチウムを混合攪拌釜に加えた。なお、12-ヒドロキシステアリン酸と水酸化リチウムの配合量は、増ちょう剤全量に対して12-ヒドロキシステアリン酸88重量%、水酸化リチウム12重量%の割合になるよう調整した。約80~130℃で加熱しながら攪拌し、けん化反応を行った。けん化反応を行った後、200℃まで加熱し、その後、冷却した。生成したゲル状物質に、残りの成分を加え攪拌した後、ロールミル又は高圧ホモジナイザーで混練し、試料油を得た。
 また、増ちょう剤Bを含有する試料油の調製において、まず、基油とセバシン酸とセバシン酸モノステアリルアミドを混合攪拌釜に加え、約80~200℃で加熱しながら攪拌した。水酸化バリウムを加え、けん化反応を行った。なお、セバシン酸とセバシン酸モノステアリルアミドと水酸化バリウムの配合量は、増ちょう剤全量に対してセバシン酸27.5重量%、セバシン酸モノステアリルアミド41.5重量%、水酸化バリウム31重量%の割合になるよう調整した。けん化反応を行った後、冷却した。生成したゲル状物質に、残りの成分を加え攪拌した後、ロールミル又は高圧ホモジナイザーで混練し、試料油を得た。
 また、増ちょう剤Cを含有する試料油の調製において、まず、基油と12-ヒドロキシステアリン酸と水酸化リチウムを混合攪拌釜に加えた。約80~130℃で加熱しながら攪拌し、けん化反応を行った。アゼライン酸を加え、80~200℃で加熱しながら攪拌し、再度けん化反応を行った。なお、12-ヒドロキシステアリン酸とアゼライン酸と水酸化リチウムの配合量は、増ちょう剤全量に対して12-ヒドロキシステアリン酸63.5重量%、アゼライン酸19重量%、水酸化リチウム17.5重量%の割合になるよう調整した。けん化反応を行った後、冷却した。生成したゲル状物質に、残りの成分を加え攪拌した後、ロールミル又は高圧ホモジナイザーで混練し、試料油を得た。
(2)評価方法
(2-1)高温離油特性
 JIS K 2220:2013に規定される「11離油度試験方法」に従い、試験温度120℃、試験時間24時間の条件下で離油度を算出した。
(2-2)低温トルク特性
 JIS K 2220:2013に規定される「18低温トルク試験方法」に従い、試験温度-40℃の条件下で起動トルクを測定した。
(2-3)高温剪断安定性
 レオメーター(Anton Paar社製)で、測定温度100℃の条件下で剪断粘度を測定した。なお、剪断粘度とは、角度2°のコーンとプレートとの間に試料油を挟み、剪断速度を0s-1から600s-1まで徐々に上げていき、剪断速度が600s-1の時の粘度である。
(2-4)静摩擦係数
 往復動試験機を用い、下部試験片上に試料油を塗布し、上から上部試験片を押しつけ往復動させた。往復動させた時の上部試験片と下部試験片との間に発生する摩擦力から静摩擦係数を測定した。試験条件を以下に示す。
 上部試験片:直径10mmのポリオキシメチレン(POM)ボール
 下部試験片:炭素鋼(S45C)プレート
 試験荷重:3kgf
 試料油の塗布量:0.05g
 摺動速度:1mm/sec
 試験温度:80℃
 摺動距離:10mm
(3)評価結果
 評価結果を、表1および表2に示す。
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
 表1より、実施例1~13では、炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1~60重量%であり、炭酸カルシウムの平均粒子径が0.1~30μmであり、基油の動粘度が40℃で18~300mm/sであり、混和ちょう度が240~320であるため、低温トルク特性、高温剪断安定性および高温離油特性に優れ、かつ、高い静摩擦係数を有することが分かった。
 一方、比較例1では、炭酸カルシウムの平均粒子径が0.1μm未満であるため、静摩擦係数が0.12と低かった。比較例2では、炭酸カルシウムの平均粒子径が30μmより大きいため、離油度が4.3重量%と高く、剪断粘度が800mPa・sと低く、高温離油特性及び高温剪断安定性に劣ることが分かった。比較例3では、炭酸カルシウムの配合量が潤滑グリース組成物の重量全体に対して1重量%未満であるため、静摩擦係数が0.12と低かった。比較例4では、炭酸カルシウムの配合量が潤滑グリース組成物の重量全体に対して60重量%より多いため、低温トルクが70N・cmと高く、低温トルク特性に劣ることが分かった。比較例5では、増ちょう剤が含まれていないため、剪断粘度が100mPa・sと低く、高温剪断安定性に劣る結果となった。比較例6では、炭酸カルシウムの代わりにPTFEとMCAを含有させたため、静摩擦係数が0.07と低かった。また、比較例7では、比較例6と同様に、炭酸カルシウムの代わりにPTFEとMCAを含有させ、さらにPTFEとMCAの配合量を増加させたため、混和ちょう度が小さくなった。また、低温トルクが50N・cmと高く、低温トルク特性に劣り、静摩擦係数も0.12と低かった。比較例8では、混和ちょう度が320より大きいため、離油度が5.5重量%と高く、高温離油特性に劣ることが分かった。比較例9では、混和ちょう度が240より小さいため、低温トルクが60N・cmと高く、低温トルク特性に劣ることが分かった。比較例10では、基油の動粘度が40℃で300mm/sより高いため、低温トルクが95N・cmと高く、低温トルク特性に劣ることが分かった。比較例11では、基油の動粘度が40℃で18mm/sより低いため、離油度が5.7重量%と高く、高温離油特性に劣ることが分かった。比較例12では、増ちょう剤が含まれていないため、離油度が6.5重量%と高く、剪断粘度が80mPa・sと低く、高温離油特性及び高温剪断安定性に劣ることが分かった。
 以上より、本発明に係る潤滑グリース組成物は、基油と、増ちょう剤と、固体潤滑剤とを含有する潤滑グリース組成物であって、固体潤滑剤が、炭酸カルシウムであり、炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1~60重量%であり、炭酸カルシウムの平均粒子径が0.1~30μmであり、基油の動粘度が40℃で18~300mm/sであり、混和ちょう度が240~320であることにより、優れた低温トルク特性、高温剪断安定性および高温離油特性を維持しつつ、高い静摩擦係数を有する。
 本発明に係る潤滑グリース組成物は、特に、樹脂部材同士、又は、樹脂部材と金属部材との摺動部分に使用するのに適していることから、種々の産業分野における機器・部品等に適用することができる。
 具体的には、複写機、プリンター等の事務機器用部品、減速機・増速機、ギヤ、チェーン、モーター等の動力伝達装置、走行系部品、ABS等の制動系部品、操舵系部品、変速機等の駆動系部品、パワーウィンドウモーター、パワーシートモーター、サンルーフモーター等の自動車補強部品、電子情報機器、携帯電話等のヒンジ部品、食品・薬品工業、鉄鋼、建設、ガラス工業、セメント工業、フィルムテンター等の化学・ゴム・樹脂工業、環境・動力設備、製紙・印刷工業、木材工業、繊維・アパレル工業における各種部品や相対運動する機械部品等に広く適用可能である。また、転がり軸受、スラスト軸受、動圧軸受、樹脂軸受、直動装置等の軸受等にも適用可能である。

Claims (4)

  1.  基油と、増ちょう剤と、固体潤滑剤とを含有する潤滑グリース組成物であって、
     前記固体潤滑剤が、炭酸カルシウムであり、
     前記炭酸カルシウムの配合量が、潤滑グリース組成物の重量全体に対して1~60重量%であり、
     前記炭酸カルシウムの平均粒子径が0.1~30μmであり、
     前記基油の動粘度が40℃で18~300mm/sであり、
     混和ちょう度が240~320であることを特徴とする、潤滑グリース組成物。
  2.  前記基油が、鉱油および合成炭化水素油の少なくとも1種であることを特徴とする、請求項1に記載の潤滑グリース組成物。
  3.  前記増ちょう剤が、金属石けん系化合物および複合金属石けん系化合物の少なくとも1種であることを特徴とする、請求項1又は2に記載の潤滑グリース組成物。
  4.  樹脂部材同士、又は、樹脂部材と金属部材との摺動部分に使用されることを特徴とする、請求項1から3のいずれか1項に記載の潤滑グリース組成物。
PCT/JP2017/026102 2016-08-08 2017-07-19 潤滑グリース組成物 WO2018030090A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2018532896A JP7105693B2 (ja) 2016-08-08 2017-07-19 潤滑グリース組成物
DE112017003959.2T DE112017003959B4 (de) 2016-08-08 2017-07-19 Schmierfettzusammensetzung und deren Verwendung
CN201780047237.7A CN109563429A (zh) 2016-08-08 2017-07-19 润滑脂组合物
US16/269,890 US10899990B2 (en) 2016-08-08 2019-02-07 Lubricating grease composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-155404 2016-08-08
JP2016155404 2016-08-08

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/269,890 Continuation US10899990B2 (en) 2016-08-08 2019-02-07 Lubricating grease composition

Publications (1)

Publication Number Publication Date
WO2018030090A1 true WO2018030090A1 (ja) 2018-02-15

Family

ID=61162438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/026102 WO2018030090A1 (ja) 2016-08-08 2017-07-19 潤滑グリース組成物

Country Status (5)

Country Link
US (1) US10899990B2 (ja)
JP (1) JP7105693B2 (ja)
CN (1) CN109563429A (ja)
DE (1) DE112017003959B4 (ja)
WO (1) WO2018030090A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210095816A1 (en) * 2019-09-27 2021-04-01 Nabtesco Corporation Container, lubricant feeder, grease gun, and connecting member
WO2023277044A1 (ja) * 2021-06-30 2023-01-05 出光興産株式会社 グリース組成物
US20240084853A1 (en) * 2019-10-10 2024-03-14 Ntn Corporation Axle bearing, grease composition and rolling ball bearing

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022123601A (ja) * 2021-02-12 2022-08-24 Nokクリューバー株式会社 潤滑グリース組成物
CN115521818A (zh) * 2022-09-29 2022-12-27 无锡飞天润滑油科技股份有限公司 一种阀门执行器润滑脂及其制备方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1135963A (ja) * 1997-07-17 1999-02-09 Nippon Kouyu:Kk 潤滑グリース組成物
JPH11124591A (ja) * 1997-08-13 1999-05-11 Oiles Ind Co Ltd 摺動部材と相手部材との組合わせ
JPH11131086A (ja) * 1997-10-28 1999-05-18 Nippon Koyu:Kk 潤滑グリ−ス組成物
JP2003013083A (ja) * 2001-07-03 2003-01-15 Cosmo Sekiyu Lubricants Kk グリース組成物
JP2003301190A (ja) * 2002-02-06 2003-10-21 Nsk Ltd グリース組成物及び転動装置
JP2004176774A (ja) * 2002-11-26 2004-06-24 Nsk Ltd 転動装置
JP2008094991A (ja) * 2006-10-13 2008-04-24 Cosmo Sekiyu Lubricants Kk ウレアグリース組成物
JP2008274091A (ja) * 2007-04-27 2008-11-13 Cosmo Sekiyu Lubricants Kk 耐火性グリース組成物
JP2009155443A (ja) * 2007-12-26 2009-07-16 Nsk Ltd 潤滑剤の劣化判断方法
JP2009209179A (ja) * 2008-02-29 2009-09-17 Nsk Ltd グリース組成物及び転動装置
JP2009209180A (ja) * 2008-02-29 2009-09-17 Kyodo Yushi Co Ltd グリース組成物及びその製造方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5093015A (en) * 1990-06-11 1992-03-03 Jet-Lube, Inc. Thread sealant and anti-seize compound
JP3272973B2 (ja) * 1997-03-18 2002-04-08 協同油脂株式会社 高温塑性加工用潤滑剤
US6919301B2 (en) 2001-10-16 2005-07-19 Nsk Ltd. Grease composition and rolling apparatus
JP2003155493A (ja) * 2001-11-21 2003-05-30 Matsumura Sekiyu Kenkyusho:Kk 高塩基化添加剤組成物
US8507415B2 (en) * 2005-05-03 2013-08-13 Southwest Research Institute Lubricant oils and greases containing nanoparticle additives
CN100587046C (zh) * 2006-09-29 2010-02-03 中国石油化工股份有限公司 一种抗水润滑脂及其制备方法
JP5450935B2 (ja) 2007-07-06 2014-03-26 Nokクリューバー株式会社 グリース組成物
EP2133407A1 (en) 2008-06-13 2009-12-16 Castrol Limited Fire resistant lubricating grease composition
WO2010044386A1 (ja) * 2008-10-17 2010-04-22 Nokクリューバー株式会社 潤滑グリース組成物およびその製造法
FR2942627B1 (fr) * 2009-02-27 2011-05-06 Total Raffinage Marketing Composition de graisse
JP5473627B2 (ja) * 2010-01-21 2014-04-16 Nokクリューバー株式会社 グリース組成物
JP5826626B2 (ja) * 2011-12-22 2015-12-02 昭和シェル石油株式会社 グリース組成物
CN104560290B (zh) * 2013-10-28 2017-11-03 中国石油化工股份有限公司 一种复合钡基润滑脂组合物及其制备方法
JP6077610B2 (ja) * 2015-08-07 2017-02-08 ミネベア株式会社 樹脂潤滑用グリース組成物
CN105255542A (zh) * 2015-10-23 2016-01-20 中国石油化工股份有限公司 含有碳酸钙晶须的复合铝基润滑脂组合物及制备方法

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1135963A (ja) * 1997-07-17 1999-02-09 Nippon Kouyu:Kk 潤滑グリース組成物
JPH11124591A (ja) * 1997-08-13 1999-05-11 Oiles Ind Co Ltd 摺動部材と相手部材との組合わせ
JPH11131086A (ja) * 1997-10-28 1999-05-18 Nippon Koyu:Kk 潤滑グリ−ス組成物
JP2003013083A (ja) * 2001-07-03 2003-01-15 Cosmo Sekiyu Lubricants Kk グリース組成物
JP2003301190A (ja) * 2002-02-06 2003-10-21 Nsk Ltd グリース組成物及び転動装置
JP2004176774A (ja) * 2002-11-26 2004-06-24 Nsk Ltd 転動装置
JP2008094991A (ja) * 2006-10-13 2008-04-24 Cosmo Sekiyu Lubricants Kk ウレアグリース組成物
JP2008274091A (ja) * 2007-04-27 2008-11-13 Cosmo Sekiyu Lubricants Kk 耐火性グリース組成物
JP2009155443A (ja) * 2007-12-26 2009-07-16 Nsk Ltd 潤滑剤の劣化判断方法
JP2009209179A (ja) * 2008-02-29 2009-09-17 Nsk Ltd グリース組成物及び転動装置
JP2009209180A (ja) * 2008-02-29 2009-09-17 Kyodo Yushi Co Ltd グリース組成物及びその製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210095816A1 (en) * 2019-09-27 2021-04-01 Nabtesco Corporation Container, lubricant feeder, grease gun, and connecting member
US11859763B2 (en) * 2019-09-27 2024-01-02 Nabtesco Corporation Container, lubricant feeder, grease gun, and connecting member
US20240084853A1 (en) * 2019-10-10 2024-03-14 Ntn Corporation Axle bearing, grease composition and rolling ball bearing
WO2023277044A1 (ja) * 2021-06-30 2023-01-05 出光興産株式会社 グリース組成物

Also Published As

Publication number Publication date
DE112017003959B4 (de) 2024-01-18
CN109563429A (zh) 2019-04-02
JPWO2018030090A1 (ja) 2019-06-06
JP7105693B2 (ja) 2022-07-25
DE112017003959T5 (de) 2019-04-25
US10899990B2 (en) 2021-01-26
US20190169522A1 (en) 2019-06-06

Similar Documents

Publication Publication Date Title
JP7105693B2 (ja) 潤滑グリース組成物
JP5330774B2 (ja) 樹脂潤滑用グリース組成物
JP5330773B2 (ja) 樹脂潤滑用グリース組成物
JP5450935B2 (ja) グリース組成物
WO2011102037A1 (ja) 無段変速機用潤滑油組成物
JP2009286950A (ja) 潤滑剤組成物
JP6703849B2 (ja) プロペラシャフトスプライン用グリース組成物およびプロペラシャフトスプライン
JP2024028640A (ja) 樹脂潤滑用グリース組成物
JP5411457B2 (ja) 潤滑剤組成物
CA2980987C (en) Lubricating grease composition of mixed oils, soap and resin
JP6269122B2 (ja) 潤滑グリース組成物
JP6229522B2 (ja) 潤滑グリース組成物
JP6775770B1 (ja) 潤滑グリース組成物
US10907113B2 (en) Lubricating grease composition, clutch and power window motor
US11274263B2 (en) Hybrid grease with low friction coefficients and high wearing protection
JP6133148B2 (ja) 駆動系変速装置用潤滑油組成物
JP5476076B2 (ja) 樹脂潤滑用グリース組成物
JP5486246B2 (ja) 潤滑剤組成物
JP2011021149A (ja) 潤滑剤組成物
JPWO2016158070A1 (ja) 潤滑グリース組成物
WO2015080046A1 (ja) 潤滑剤組成物

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17839163

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2018532896

Country of ref document: JP

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 17839163

Country of ref document: EP

Kind code of ref document: A1