WO2009104790A1 - グリース組成物及び軸受 - Google Patents
グリース組成物及び軸受 Download PDFInfo
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- WO2009104790A1 WO2009104790A1 PCT/JP2009/053168 JP2009053168W WO2009104790A1 WO 2009104790 A1 WO2009104790 A1 WO 2009104790A1 JP 2009053168 W JP2009053168 W JP 2009053168W WO 2009104790 A1 WO2009104790 A1 WO 2009104790A1
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- base oil
- grease composition
- oil
- bearing
- grease
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/02—Mixtures of base-materials and thickeners
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- 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
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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
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- 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
- C10M2207/28—Esters
- C10M2207/283—Esters of polyhydroxy compounds
- C10M2207/2835—Esters of polyhydroxy compounds used as base material
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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
- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
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- 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
- C10N2030/36—Seal compatibility, e.g. with rubber
-
- 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 and a bearing, and more particularly, to a grease composition suitable for use in a rolling bearing for automobile electrical equipment and auxiliary equipment, and a rolling bearing for automobile electrical equipment and auxiliary equipment in which the grease composition is enclosed.
- the seals used in bearings are mainly made of materials based on polyacrylic rubber (ACM), which has higher heat resistance than the conventional resin and rubber materials. It is coming. Under such circumstances, grease is required to have a long bearing lubrication life at high temperatures and to have excellent compatibility with a sealing material, that is, an ACM material.
- ACM polyacrylic rubber
- Patent Document 1 discloses a diurea compound represented by the following general formula as a thickener in a base oil containing an ether-based synthetic oil in an amount exceeding 50% by mass. A grease composition using is described.
- R 1 represents a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms
- R 2 and R 3 are the same or different groups, and are a cyclohexyl group, a cyclohexyl derivative group having 7 to 12 carbon atoms, or Represents an alkyl group having 8 to 20 carbon atoms
- the ratio of the number of moles of the cyclohexyl group and its derivative group to the total number of moles of the cyclohexyl group, the cyclohexyl derivative group having 7 to 12 carbon atoms and the alkyl group having 8 to 20 carbon atoms is 50 ⁇ 100%.
- this grease composition lacks compatibility between the base oil and the thickener, and lacks inflow properties, so that the bearing life is not satisfactory.
- the present invention provides the following grease composition and a bearing in which the grease composition is enclosed. 1.
- the base oil contains a synthetic hydrocarbon oil, and the content of the synthetic hydrocarbon oil in the base oil is 20% by mass or more of the whole base oil.
- R 1 NHCONH—R 2 —NHCONH—R 3
- R 2 represents a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms
- R 1 and R 3 are the same or different groups, and are a cyclohexyl group, a straight chain having 8 to 18 carbon atoms, This represents a branched alkyl group, and the number of moles of the cyclohexyl group relative to the total number of moles of R 1 and R 3 is 60 to 95%.
- the base oil further comprises an ether-based synthetic oil. 3.
- the grease composition of the present invention uses a specific cycloaliphatic / aliphatic diurea as a thickener, the inflow of the grease composition to the lubricating part is ensured, and a synthetic hydrocarbon oil is used as the base oil.
- a base oil in which the content of the synthetic hydrocarbon oil in the base oil is 20% by mass or more of the whole base oil, and the content of the ester-based oil in the base oil is 20% by mass or less of the whole base oil Therefore, heat resistance and acrylic rubber resistance are secured. Therefore, the grease composition of the present invention, when used in a bearing, can extend the life of the bearing even in a high temperature environment, and has excellent acrylic rubber resistance. It is an alternator, an electromagnetic clutch for a car air conditioner, an intermediate pulley, an idler. It is particularly suitable as a grease composition used for electrical equipment and auxiliary machinery bearings such as pulleys and tension pulleys.
- the carbon number of the linear or branched alkyl group having 8 to 18 carbon atoms to be combined is also related to the fluidity of the grease, and therefore preferably has 16 to 18 carbon atoms. These may be a mixture of two or more kinds having different carbon numbers.
- the base oil of the grease composition of the present invention contains a synthetic hydrocarbon oil, and the content of the synthetic hydrocarbon oil is 20% by mass or more, preferably 40% by mass or more of the whole base oil.
- base oils other than synthetic hydrocarbon oils all base oils including mineral oil can be used.
- ester synthetic oils represented by diesters and polyol esters, alkyl diphenyl ethers, ether synthetic oils represented by polypropylene glycol, silicone synthetic oils, and fluorine synthetic oils can be used.
- ester-based synthetic oil increases the fluidity of the grease and is effective in extending the bearing lubrication life, but it swells and deteriorates acrylic rubber, so it is better not to use ester-based synthetic oil. In such a case, the content is 20% by mass or less based on the entire base oil.
- additives usually used in grease compositions can be added as necessary.
- additives include antioxidants typified by amines and phenols, inorganic passivating agents such as sodium nitrite, sulfonates, succinic acids, amines, and carboxylates.
- Rust inhibitors, metal corrosion inhibitors typified by benzotriazole, oiliness agents typified by fatty acids, fatty acid esters and phosphate esters, antiwear and extreme pressure agents typified by phosphorus, sulfur and organometallics
- solid lubricants typified by metal oxide salts and molybdenum disulfide.
- additives for suppressing hydrogen brittle exfoliation such as passivating agents (for example, those described in Japanese Patent No. 2878749), organic sulfonates, thiocarbamates and the like (for example, those described in Japanese Patent Application Laid-Open No. 2007-262300) ) Can also be added.
- Examples 1 to 6 and Comparative Examples 1 to 6 Preparation of test grease In a base oil, a predetermined amount of amine (cyclohexylamine, stearylamine, p-toluidine) is reacted with aromatic diisocyanate (diphenylmethane diisocyanate) so that the penetration is 280 (JIS K2220). A base grease was prepared by diluting with oil. Additives were added to this grease to prepare grease compositions of Examples 1 to 6 and Comparative Examples 1 to 6.
- amine cyclohexylamine, stearylamine, p-toluidine
- aromatic diisocyanate diphenylmethane diisocyanate
- Thickener Content of cyclohexyl group (CH) (mol%) [ ⁇ (number of moles of cyclohexyl group) / (number of moles of cyclohexyl group) + (number of moles of alkyl group) ⁇ ⁇ 100]
- Thickener C Aromatic diurea (using p-toluidine)
- the prepared grease composition was evaluated by the following test method. The results are shown in Tables 1 and 2.
- Bearing lubrication life test (according to ASTM D3336) Inner ring rotation test to evaluate bearing life at high temperatures. Operation was performed under the following conditions, and when the motor overcurrent or the temperature increased by 15 ° C. from the specified temperature, the life was judged.
- Acrylic rubber immersion test (JIS K-6258) After measuring the volume of the test rubber before the test, the test rubber is immersed in grease packed in a bottle and left in a constant temperature bath at a specified temperature. After reaching the specified time, the volume of the test rubber is measured and the volume change rate is calculated. Test temperature: 180 ° C Test time: 72 hours Volume change rate: Change rate 20% or less Acceptable comprehensive evaluation Bearing lubrication life test 600 hours or more pass Acrylic rubber immersion test Volume change rate 20% or less Acceptable penetration: (Consistency is unified to 280)
- the synthetic hydrocarbon oil is contained, the content of the synthetic hydrocarbon oil in the base oil is 20% by mass or more of the whole base oil, and the content of the ester oil in the base oil is 20% by mass or less of the whole base oil.
- the grease compositions of Examples 1 to 6 in which the proportion of cyclohexyl groups in the thickener is in the range of 60 to 95% have a long bearing lubrication life and excellent acrylic rubber resistance.
- the grease compositions of Comparative Examples 1-3 and 6 in which the ratio of cyclohexyl groups in the thickener is outside the range of 60 to 95% have a bearing lubrication life of less than 600 hours, and the base oil It can be seen that the acrylic rubber resistance of the grease composition of Comparative Example 4-6 in which the content of the ester-based synthetic oil is 20% or more is lowered.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
使用環境の高温下に伴い、軸受に使用されているシールも、従来から使用されていた樹脂材やゴム材から、より耐熱性の高いポリアクリルゴム(ACM)をベースとした材料が主流となってきている。このような環境の中、グリースには高温下で軸受潤滑寿命が長く、且つシール材すなわちACM材との適合性に優れることが求められている。
しかしながらこれらのグリースは、基油や増ちょう剤の耐熱性が不足したり、グリースの潤滑部への流入性が不足したりして、高温下での軸受寿命は決して満足するものではない。
一方、増ちょう剤により流入性を向上させた例として、特許文献1には、50質量%を超える量のエーテル系合成油を含む基油に、増ちょう剤として下記一般式で表わされるジウレア化合物を使用したグリース組成物が記載されている。
R1-NHCONH-R2-NHCONH-R3
式中、R1は炭素数6~15の2価の芳香族炭化水素基を示し、R2およびR3は同一若しくは異なる基であって、シクロヘキシル基、炭素数7~12のシクロヘキシル誘導体基または炭素数8~20のアルキル基を示し、シクロヘキシル基、炭素数7~12のシクロヘキシル誘導体基及び炭素数8~20のアルキル基の総モル数に対するシクロヘキシル基及びその誘導体基のモル数の割合が50~100%である。
しかし、このグリース組成物は、基油と増ちょう剤の相溶性が不足し、また流入性に欠け、軸受寿命は満足するものではない。
本発明の他の目的は、上記グリース組成物を封入した軸受を提供することである。
1.増ちょう剤と基油を含むグリース組成物において、基油が合成炭化水素油を含み、基油中の合成炭化水素油の含有量が基油全体の20質量%以上であり、基油中のエステル系油の含有量が基油全体の20質量%以下であり、増ちょう剤が下記式(I)で示されるジウレア化合物を含むことを特徴とするグリース組成物。
(I) R1-NHCONH-R2-NHCONH-R3
式中、R2は炭素数6~15の2価の芳香族炭化水素基を示し、R1およびR3は、同一または異なる基であり、シクロヘキシル基、または炭素数8~18の直鎖又は分岐アルキル基を示し、R1およびR3の合計モル数に対するシクロヘキシル基のモル数は60~95%である。
2.基油がさらにエーテル系合成油を含む上記1記載のグリース組成物。
3.R1およびR3の合計モル数に対するシクロヘキシル基のモル数が70~90%である上記1又は2記載のグリース組成物。
4.軸受用である上記1~3のいずれか1項記載のグリース組成物。
5.軸受が自動車電装・補機用転がり軸受である上記4記載のグリース組成物。
6.自動車電装・補機用転がり軸受が、外輪回転軸受である上記5記載のグリース組成物。
7.上記1~6のいずれか1項記載のグリース組成物を封入した軸受。
本発明では、電装・補機用転がり軸受のような高温・高速軸受に使用されるグリース組成物とてして、式(I)において、R1およびR3の合計モル数に対するシクロヘキシル基のモル数を60~95%、好ましくは70~90%とすることにより、適度な流動性を確保している。
上記に加え、組み合わせる炭素数8~18の直鎖又は分岐アルキル基の炭素数もグリースの流動性に関与するので、好ましくは炭素数16~18である。これらは炭素数の異なる2種以上のものの混合物であっても良い。
試験グリースの調製
基油中で、芳香族ジイソシアネート(ジフェニルメタンジイソシアネート)に所定量のアミン(シクロヘキシルアミン、ステアリルアミン、p-トルイジン)を反応させ、混和ちょう度が280(JIS K2220)になるように基油で希釈してベースグリースを調製した。このグリースに添加剤を加え、実施例1~6及び比較例1~6のグリース組成物を調製した。
シクロヘキシル基(CH)の含有率(モル%)=[{(シクロヘキシル基のモル数)/(シクロヘキシル基のモル数)+(アルキル基のモル数)}×100]
増ちょう剤A:脂環式・脂肪族ジウレア
増ちょう剤B:脂環式ジウレア
増ちょう剤C:芳香族ジウレア(p-トルイジン使用)
調製したグリース組成物を、下記の試験方法により評価した。結果を表1及び表2に示す。
軸受潤滑寿命試験(ASTM D3336準拠)
高温下での軸受寿命を評価する内輪回転の試験。下記の条件で運転し、モータの過電流もしくは規定の温度よりも+15℃上昇した場合に寿命と判断した。
試験前に試験ゴムの体積を測定後、ビンに詰めたグリース中に試験ゴムを浸漬させ規定温度の恒温槽に静置する。規定時間に到達した後、試験ゴムの体積を測定し、体積変化率を算出する。
試験温度 :180℃
試験時間 :72時間
体積変化率:変化率20%以下合格
総合評価
軸受潤滑寿命試験 600時間以上合格
アクリルゴム浸漬試験 体積変化率20%以下合格
混和ちょう度:(ちょう度は280に統一した。)
合成炭化水素油を含み、基油中の合成炭化水素油の含有量が基油全体の20質量%以上であり、基油中のエステル系油の含有量が基油全体の20質量%以下であり、増ちょう剤中のシクロヘキシル基の割合が60~95%の範囲にある実施例1~6のグリース組成物は、軸受潤滑寿命が長く、且つ耐アクリルゴム性に優れている。
これに対して増ちょう剤中のシクロヘキシル基の割合が60~95%の範囲外にある比較例1-3及び比較例6のグリース組成物は、軸受潤滑寿命が600時間未満であり、基油中のエステル系合成油の含有率が20%以上である比較例4-6のグリース組成物では、耐アクリルゴム性が低下することがわかる。
Claims (7)
- 増ちょう剤と基油を含むグリース組成物において、基油が合成炭化水素油を含み、基油中の合成炭化水素油の含有量が基油全体の20質量%以上であり、基油中のエステル系油の含有量が基油全体の20質量%以下であり、増ちょう剤が下記式(I)で示されるジウレア化合物を含むことを特徴とするグリース組成物。
(I) R1-NHCONH-R2-NHCONH-R3
式中、R2は炭素数6~15の2価の芳香族炭化水素基を示し、R1およびR3は、同一または異なる基であり、シクロヘキシル基、または炭素数8~18の直鎖又は分岐アルキル基を示し、R1およびR3の合計モル数に対するシクロヘキシル基のモル数は60~95%である。 - 基油がさらにエーテル系合成油を含む請求項1記載のグリース組成物。
- R1およびR3の合計モル数に対するシクロヘキシル基のモル数が70~90%である請求項1又は2記載のグリース組成物。
- 軸受用である請求項1~3のいずれか1項記載のグリース組成物。
- 軸受が自動車電装・補機用転がり軸受である請求項4記載のグリース組成物。
- 自動車電装・補機用転がり軸受が、外輪回転軸受である請求項5記載のグリース組成物。
- 請求項1~6のいずれか1項記載のグリース組成物を封入した軸受。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980106002.6A CN101952401B (zh) | 2008-02-22 | 2009-02-23 | 润滑脂组合物以及轴承 |
EP09713396.1A EP2264132B1 (en) | 2008-02-22 | 2009-02-23 | Grease composition and bearings |
KR1020107014308A KR101245687B1 (ko) | 2008-02-22 | 2009-02-23 | 그리스 조성물 및 베어링 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2008041764A JP5467727B2 (ja) | 2008-02-22 | 2008-02-22 | グリース組成物及び軸受 |
JP2008-041764 | 2008-02-22 |
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WO2009104790A1 true WO2009104790A1 (ja) | 2009-08-27 |
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PCT/JP2009/053168 WO2009104790A1 (ja) | 2008-02-22 | 2009-02-23 | グリース組成物及び軸受 |
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EP (1) | EP2264132B1 (ja) |
JP (1) | JP5467727B2 (ja) |
KR (1) | KR101245687B1 (ja) |
CN (1) | CN101952401B (ja) |
WO (1) | WO2009104790A1 (ja) |
Cited By (3)
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WO2011105601A1 (ja) * | 2010-02-26 | 2011-09-01 | 協同油脂株式会社 | アンギュラ玉軸受を使用したハブユニット軸受用グリース組成物及びハブユニット軸受 |
WO2012053575A1 (ja) * | 2010-10-20 | 2012-04-26 | 協同油脂株式会社 | グリース組成物 |
JP2014088527A (ja) * | 2012-10-31 | 2014-05-15 | Kyodo Yushi Co Ltd | ハブユニット軸受用グリース組成物 |
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US9487726B2 (en) | 2011-01-06 | 2016-11-08 | Jx Nippon Oil & Energy Corporation | Imide compound, method for producing same, thickening agent for grease, and grease composition |
JP2012172066A (ja) * | 2011-02-22 | 2012-09-10 | Kyodo Yushi Co Ltd | グリース組成物 |
EP2975105B1 (en) * | 2013-03-14 | 2020-10-14 | Idemitsu Kosan Co., Ltd | Grease composition for bearing |
JP6845633B2 (ja) | 2016-08-04 | 2021-03-17 | 協同油脂株式会社 | グリース組成物 |
US11421176B2 (en) * | 2016-09-28 | 2022-08-23 | Jtekt Corporation | Grease composition and hub unit |
WO2021060232A1 (ja) | 2019-09-24 | 2021-04-01 | 株式会社ジェイテクト | グリース組成物および転がり軸受 |
JP2023151691A (ja) * | 2022-03-31 | 2023-10-16 | 出光興産株式会社 | グリース組成物 |
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WO2011105601A1 (ja) * | 2010-02-26 | 2011-09-01 | 協同油脂株式会社 | アンギュラ玉軸受を使用したハブユニット軸受用グリース組成物及びハブユニット軸受 |
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JP2014088527A (ja) * | 2012-10-31 | 2014-05-15 | Kyodo Yushi Co Ltd | ハブユニット軸受用グリース組成物 |
Also Published As
Publication number | Publication date |
---|---|
EP2264132A1 (en) | 2010-12-22 |
EP2264132A4 (en) | 2012-05-02 |
KR101245687B1 (ko) | 2013-03-25 |
KR20100103809A (ko) | 2010-09-28 |
JP2009197162A (ja) | 2009-09-03 |
EP2264132B1 (en) | 2014-09-10 |
CN101952401B (zh) | 2014-02-26 |
JP5467727B2 (ja) | 2014-04-09 |
CN101952401A (zh) | 2011-01-19 |
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