US20250243424A1 - Grease composition - Google Patents

Grease composition

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Publication number
US20250243424A1
US20250243424A1 US18/855,045 US202318855045A US2025243424A1 US 20250243424 A1 US20250243424 A1 US 20250243424A1 US 202318855045 A US202318855045 A US 202318855045A US 2025243424 A1 US2025243424 A1 US 2025243424A1
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US
United States
Prior art keywords
nhconh
thickener
diurea
grease
group
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.)
Pending
Application number
US18/855,045
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English (en)
Inventor
Tadaaki KONNO
Masaki Hashimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyodo Yushi Co Ltd
Original Assignee
Kyodo Yushi Co Ltd
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 Kyodo Yushi Co Ltd filed Critical Kyodo Yushi Co Ltd
Assigned to KYODO YUSHI CO., LTD. reassignment KYODO YUSHI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KONNO, Tadaaki, HASHIMOTO, MASAKI
Publication of US20250243424A1 publication Critical patent/US20250243424A1/en
Pending 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
    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • 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
    • C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen 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
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • 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
    • C10M2215/10—Amides of carbonic or haloformic acids
    • C10M2215/102—Ureas; Semicarbazides; Allophanates
    • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/019—Shear stability
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/02—Viscosity; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
    • C10N2020/055—Particles related characteristics
    • 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
    • C10N2030/68—Shear stability
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/04—Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy

Definitions

  • the present invention relates to a grease composition that can be suitably used for lubricating portions that require shear stability of the grease, such as lubricating portions of machine parts having steel lubricated portions that perform rolling motion and rolling/sliding motion.
  • Grease is a semi-solid or semi-liquid substance obtained by dispersing a thickener in a liquid lubricating oil (base oil).
  • base oil liquid lubricating oil
  • Grease unlike lubricating oil, does not flow under an external force such as gravity; it begins to flow when a significant external force exceeding the yield value is applied, and when it begins to flow, it exhibits the same lubricating action as lubricating oil.
  • This characteristic allows for miniaturization of equipment thanks to the advantage of simplifying the structure around the lubricating portion; therefore, grease is used in all industrial fields, including automobiles, electrical appliances, information equipment, railway vehicles, industrial machinery, and aerospace equipment.
  • the degree of semi-solid or solid state (hardness) that appears in the definition of grease is expressed by “consistency” and is graded according to the range of “worked penetration,” which is the penetration after a specified number of reciprocating mixing cycles.
  • a grease with an appropriate consistency is selected from the viewpoints of ease of handling and leakage suppression. For example, for rolling bearing grease, No. 2 grade with a worked penetration of 265 to 295 is relatively often used; when supplying grease by centralized lubrication, No. 0 grade with a worked penetration of 355 to 385 is often used.
  • Non Patent Literature 1 “Fundamentals and Applications of Lubricating Grease” edited by the Grease Research Committee of the Japan Society of Tribologists, P. 39 (2007), Yokendo
  • Non Patent Literature 2 “A Simple Story of Grease,” P. 27 (2010), Juntsu Publishing Co., Ltd.
  • An object of the present invention is to provide a grease composition having excellent shear stability.
  • a grease composition comprising
  • the grease composition of the present invention has excellent shear stability.
  • FIG. 1 illustrates an X-ray diffraction pattern.
  • the solid line is the diffraction pattern of the grease produced in Example 1, and the broken line is the diffraction pattern of the grease produced in Comparative Example 2.
  • the thickener that can be used in the present invention contains a mixture of diurea compounds represented by the following formulas (I), (II), and (III):
  • R1 is a cyclohexyl group
  • R2 is a C6-15 divalent aromatic hydrocarbon group
  • R3 is a C8-20 linear or branched alkyl group or alkenyl group
  • a ratio of the number of moles of the cyclohexyl group to the total number of moles of the cyclohexyl group and the alkyl group or alkenyl group [ ⁇ R1/(R1+R3) ⁇ 100] hereinafter sometimes referred to as “cyclohexyl %” or “CH %” is 90 to 0 mol %, preferably 80 to 0 mol %.
  • a thickener having a cyclohexyl % of 0 mol % is called an aliphatic diurea thickener and as is synthesized from a diisocyanate such as diphenylmethane-4,4′-diisocyanate and a monoamine having a C8-20 linear or branched alkyl group or alkenyl group.
  • a diisocyanate such as diphenylmethane-4,4′-diisocyanate
  • a monoamine having a C8-20 linear or branched alkyl group or alkenyl group As the aliphatic diurea, a compound synthesized from diphenylmethane-4,4′-diisocyanate and octylamine, octadecylamine, or a mixture thereof is preferable.
  • the structural formulas of more preferable aliphatic diureas are shown below.
  • a thickener having a cyclohexyl % of more than 0 mol % and 90 mol % or less is called an alicyclic-aliphatic diurea and is synthesized from a diisocyanate such as diphenylmethane-4,4′-diisocyanate, cyclohexylamine, and a monoamine having a C8-20 linear or branched alkyl group or alkenyl group.
  • alicyclic-aliphatic diurea Since alicyclic-aliphatic diurea is synthesized using two different amines, it is a mixture of an alicyclic diurea represented by formula (I), an aliphatic diurea represented by formula (II), and an alicyclic-aliphatic diurea represented by formula (III).
  • a more preferable alicyclic-aliphatic diurea is a mixture of the following structural formulas (I-1) to (III-1).
  • aliphatic diurea is preferable.
  • aliphatic diurea synthesized from diphenylmethane-4,4′-diisocyanate and octylamine or octadecylamine is preferable.
  • Aliphatic diurea synthesized from diphenylmethane-4,4′-diisocyanate and octylamine or octadecylamine is preferable from the viewpoints of shear stability and fluidity.
  • the content of the thickener in the grease composition of the present invention is not particularly limited, but is preferably 3 to 20 mass %, more preferably 6 to 18 mass %, and even more preferably 9 to 16 mass %, based on the total mass of the composition, from the viewpoints of fluidity and durability.
  • the base oil usable in the present invention is not particularly limited.
  • Mineral oil, synthetic oil, or a mixture thereof can be used.
  • mineral oils include paraffinic mineral oils and naphthenic mineral oils.
  • synthetic oils include ester-based synthetic oils such as diesters and polyol esters; synthetic hydrocarbon oils such as poly- ⁇ -olefin and polybutene; ether-based synthetic oils such as alkyldiphenyl ether and polypropylene glycol; silicone oils; and fluorinated oils.
  • the synthetic oil may be a so-called biomass oil produced from biological resources as raw materials derived from animals and plants.
  • biomass ester oils synthesized from various fatty acids and alcohols derived from vegetable oils as raw materials, and biomass hydrocarbon oils using vegetable oils such as palm oil, corn oil, and soybean oil.
  • the base oil may be used alone or in admixture of two or more.
  • mineral oil As the base oil of the present invention, mineral oil, poly- ⁇ -olefin, polyol ester, and alkyldiphenyl ether are preferable, and it is more preferable to contain mineral oil and poly- ⁇ -olefin.
  • the mineral oil is preferably a paraffinic mineral oil, and is more preferably a Group II paraffinic mineral oil (i.e., sulfur content of 0.03 mass % or less, saturates of 90 vol % or more, viscosity index of 80 or more and less than 120) or a Group III paraffinic mineral oil (i.e., sulfur content of 0.03 mass % or less, saturates of 90 vol % or more, viscosity index of 120 or more) in the American Petroleum Institute classification.
  • Group II paraffinic mineral oil i.e., sulfur content of 0.03 mass % or less, saturates of 90 vol % or more, viscosity index of 80 or more and less than 120
  • Group III paraffinic mineral oil i
  • the entirety preferably contains 50 mass % or more, more preferably 80 mass % or more, and even more preferably 90 mass % or more of mineral oil and/or poly- ⁇ -olefin based on the total mass of the base oil.
  • the kinematic viscosity of the base oil used in the present invention is not particularly limited, but the kinematic viscosity at 100° C. is preferably 5 to 30 mm 2 /s, more preferably 7 to 20 mm 2 /s, and even more preferably 10 to 16 mm 2 /s.
  • the kinematic viscosity of the base oil is in such a range, it is preferable from the viewpoints of durability and heat generation.
  • the content of the base oil is preferably 50 to 95 mass %, more preferably 70 to 95 mass %, and even more preferably 80 to 90 mass %, based on the total mass of the composition.
  • the proportion of the base oil is in such a range, it is preferable from the viewpoint of fluidity.
  • the penetration is preferably 280 to 360, more preferably 300 to 350, and particularly preferably 300 to 330 from the viewpoint of handling properties.
  • penetration means 60-stroke worked penetration measured according to JIS K2220 7. In addition, unless otherwise specified, it refers to the penetration of unused grease.
  • the shear stability of grease can be evaluated using the penetration after the roll stability test as a criterion. Unused grease is used for the roll stability test.
  • the penetration after the roll stability test is preferably 440 or less. It is more preferably 420 or less, and even more preferably 400 or less. It is particularly preferably 380 or less, and most preferably 360 or less.
  • the shear stability of grease is determined by the structural stability of the thickener, and the structural stability of the thickener depends on the type of thickener and the state of the crystal.
  • the crystal structure of the urea-based thickener has a stable type or a metastable type (a type that easily transitions to the stable type by applying energy), and when the thickener has a stable type structure, the grease exhibits good shear stability.
  • the metastable type since the molecules are connected straight to form crystals, a peak is detected at a position of the molecular cell size close to the molecular size (maximum value) geometrically calculated in theory; however, in the stable type, since the molecules are connected obliquely to form crystals, a peak is detected at a position of a smaller molecular cell size away from the molecular size (maximum value) geometrically calculated in theory.
  • the diurea thickener when the diurea thickener has a peak in which the value obtained by dividing the molecular cell size of the diurea thickener measured by X-ray diffraction by the molecular cell size of the diurea thickener represented by the same chemical formula obtained by geometric calculation is in the range of 0.7 to 0.4, it is determined that the crystal structure is in a stable form and the grease has better shear stability.
  • the calculation was performed by the molecular mechanics method using MMFF94 (Merck Molecular Force Field 94) as the molecular force field.
  • the molecular shape in the single molecule state was determined using the energy optimization function of the molecular editor software “Avogadro,” and the molecular size was calculated.
  • the thickener to be measured by X-ray diffraction is a diurea thickener contained in the grease before use (that is, before being sheared at the lubrication portion).
  • the urea-based grease to which the grease composition of the present invention belongs is generally produced through a step of reacting an isocyanate and an amine, and then a step of growing a urea crystal structure by heating and holding the reaction product.
  • the molecular-level structure of the thickener is determined
  • the crystal-level structure of the thickener is determined.
  • the target grease is obtained through a step of dispersing the thickener.
  • a size more macro than the crystal level is controlled.
  • the reaction temperature in the reaction step is 80° C. or lower, and the heating temperature in the growth step is 120 to 180° C.; however, in the present invention, by setting the heating temperature in the growth step higher than usual and changing the subsequent holding time from the conventional one, a grease composition containing a thickener having a stable crystal structure was successfully obtained.
  • the heating temperature is preferably higher than 190° C., more preferably 195° C. or higher, preferably 220° C. or lower, and more preferably 210° C. or lower.
  • the holding time after heating is preferably 1 hour or less, and more preferably 30 minutes or less, although it depends on the heating temperature. The holding time may be 0 hours.
  • the grease composition of the present invention can contain additives commonly used in various lubricating oils and greases.
  • Commonly used additives include the following:
  • the grease composition of the present invention can be used, for example, for machine parts having steel lubricated portions that perform rolling motion and rolling/sliding motion, and typical examples thereof include rolling bearings, gears, ball screws, linear guide bearings, joints, and cams.
  • rolling bearings used in various motors for industrial machinery, various motors for office equipment, and various motors for automobiles; rolling bearings used in automotive electrical components and auxiliary components such as automotive wheel bearings, alternators, electromagnetic clutches, idler pulleys, and timing belt tensioners; gears used in reducers and speed increasers of wind turbines, robots, and automobiles; ball screws used in electric power steering and machine tools; linear guide bearings used in industrial equipment and electronic equipment; and constant velocity joints used in automotive drive shafts and propeller shafts. It is particularly suitable for use in reducers, speed increasers, drive shafts, and propeller shafts.
  • a base oil and 1 mole of diphenylmethane-4,4′-diisocyanate were placed in a vessel, and the mixture was heated to 70 to 80° C.
  • a base oil and 2 moles of amine were placed in a separate vessel, heated to 70 to 80° C., and then added to the previous vessel, followed by reaction for 30 minutes with good stirring. Then, the temperature was raised to the temperature described in Tables 1 and 2 with stirring, held for about 30 minutes, and then allowed to cool to obtain a base grease.
  • an amine-based antioxidant was added in an amount of 1 mass % based on the total mass of the finally obtained grease, a base oil was added as appropriate, and the resulting mixture was adjusted to a penetration of 300 using a three-roll mill.
  • the raw materials used for the preparation of the grease are as follows:
  • the shear stability of the grease compositions of Examples and Comparative Examples obtained above was evaluated by a roll stability test.
  • the roll stability was measured by the method specified in ASTM D 1831. However, the temperature and test time were changed to 120° C. and 24 hours. The results are shown in Tables 1 and 2.
  • the penetration used as the criterion is the penetration after 60 strokes of working after the roll stability test.
  • the shear stability of the grease compositions of Examples and Comparative Examples obtained above was evaluated by X-ray diffraction.
  • An X-ray diffractometer (XRD, D8 DISCOVER, manufactured by Bruker) was used for the measurement.
  • the calculation was performed by the molecular mechanics method using MMFF94 as the molecular force field, as described above.
  • the grease compositions were evaluated by the presence or absence of a peak corresponding to the above formula (A) among peaks measured by X-ray diffraction. The results are shown in Tables 1 and 2. Further, the X-ray diffraction patterns of Example 1 and Comparative Example 2 are shown in FIG. 1 .
  • Example 1 Example 2
  • Example 3 Example 4 Thickener Aliphatic Aliphatic Aliphatic Alicyclic- Diurea Diurea Diurea Aliphatic (C18) (C18) (C8) Diurea Base Oil Mineral Oil Mineral Oil Mineral Oil Mineral Oil Base Grease 195° C. 200° C. 170° C. 170° C. Heating Condition Shear Stability ⁇ ⁇ ⁇ ⁇ 328 362 349 385 X-ray Present, Present, — — Diffraction Approx. 0.63 Approx. 0.63
  • Example 2 Example 3 Thickener Aliphatic Aliphatic Aliphatic Diurea Diurea Diurea (C8/C18) (C18) (C18) Base Oil Mineral Oil Mineral Oil Mineral Oil Base Grease 170° C. 170° C. 190° C. Heating Condition Shear X X X Stability 440 ⁇ 440 ⁇ 440 ⁇ X-ray — Absent, Absent, Diffraction Approx. 0.77 Approx. 0.77

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
US18/855,045 2022-04-11 2023-04-11 Grease composition Pending US20250243424A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2022065105 2022-04-11
JP2022-065105 2022-04-11
PCT/JP2023/014691 WO2023199911A1 (ja) 2022-04-11 2023-04-11 グリース組成物

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US20250243424A1 true US20250243424A1 (en) 2025-07-31

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US18/855,045 Pending US20250243424A1 (en) 2022-04-11 2023-04-11 Grease composition

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US (1) US20250243424A1 (https=)
EP (1) EP4509586A4 (https=)
JP (1) JPWO2023199911A1 (https=)
KR (1) KR20250006029A (https=)
CN (1) CN119013380A (https=)
WO (1) WO2023199911A1 (https=)

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59124997A (ja) * 1983-01-05 1984-07-19 Kyodo Yushi Kk グリ−スの製造方法
JPS60231796A (ja) * 1984-05-02 1985-11-18 Showa Shell Sekiyu Kk ウレアグリ−ス組成物
JPS63162790A (ja) * 1986-12-26 1988-07-06 Kyodo Yushi Kk ウレアグリ−ス組成物
JP2553142B2 (ja) * 1988-04-21 1996-11-13 協同油脂株式会社 ウレアグリース組成物
JPH0776353B2 (ja) * 1988-09-16 1995-08-16 日本グリース株式会社 円すいころ軸受用ウレアグリース組成物
JP2942287B2 (ja) * 1989-10-02 1999-08-30 住友電気工業株式会社 アンボンドｐｃ鋼より線用防錆潤滑剤
JPH0747753B2 (ja) * 1990-02-08 1995-05-24 株式会社日本▲砿▼油 低騒音ウレアグリース組成物の製法
JP2864473B2 (ja) * 1992-06-29 1999-03-03 昭和シェル石油株式会社 ウレア系グリース組成物
AU721723B2 (en) * 1995-08-24 2000-07-13 Lubrizol Corporation, The Polyurea-thickened grease composition
JP3988897B2 (ja) * 1996-06-07 2007-10-10 協同油脂株式会社 等速ジョイント用グリース組成物
JP4976795B2 (ja) * 2006-09-21 2012-07-18 昭和シェル石油株式会社 ウレアグリース組成物
JP5267074B2 (ja) * 2008-11-26 2013-08-21 日本精工株式会社 正逆回転モータ用転がり軸受ユニット
JP5390849B2 (ja) * 2008-12-18 2014-01-15 昭和シェル石油株式会社 ポリアミドまたはポリアセタール樹脂製ギヤ潤滑用ウレアグリース組成物。
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
JP6223863B2 (ja) * 2014-02-27 2017-11-01 昭和シェル石油株式会社 グリース組成物
JP6546727B2 (ja) * 2014-08-29 2019-07-17 協同油脂株式会社 グリース組成物
JP6348050B2 (ja) * 2014-11-05 2018-06-27 日本グリース株式会社 風力発電機用生分解性グリース組成物
JP6726487B2 (ja) * 2016-03-08 2020-07-22 協同油脂株式会社 グリース組成物
CN111073725A (zh) * 2018-10-18 2020-04-28 中国石油化工股份有限公司 光致发光润滑脂组合物、光致发光材料和它们的制备方法

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WO2023199911A1 (ja) 2023-10-19
EP4509586A1 (en) 2025-02-19
EP4509586A4 (en) 2025-07-09
CN119013380A (zh) 2024-11-22
KR20250006029A (ko) 2025-01-10
JPWO2023199911A1 (https=) 2023-10-19

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