EP0987312A1 - Composition de graisse pour pallier - Google Patents

Composition de graisse pour pallier Download PDF

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Publication number
EP0987312A1
EP0987312A1 EP99115246A EP99115246A EP0987312A1 EP 0987312 A1 EP0987312 A1 EP 0987312A1 EP 99115246 A EP99115246 A EP 99115246A EP 99115246 A EP99115246 A EP 99115246A EP 0987312 A1 EP0987312 A1 EP 0987312A1
Authority
EP
European Patent Office
Prior art keywords
grease composition
bearing grease
bearing
carbonate
carbon atoms
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.)
Granted
Application number
EP99115246A
Other languages
German (de)
English (en)
Other versions
EP0987312B1 (fr
Inventor
Yasuhiro c/o Nippon Grease Co. Ltd. Miyamoto
Motoharu c/o Minebea Co. Ltd. Akiyama
Seiji c/o Nippon Grease Co. Ltd. Okamura
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.)
Minebea Co Ltd
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Minebea Co Ltd
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Filing date
Publication date
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Publication of EP0987312A1 publication Critical patent/EP0987312A1/fr
Application granted granted Critical
Publication of EP0987312B1 publication Critical patent/EP0987312B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/48—Esters of carbonic acid
    • 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
    • C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
    • C10M117/02—Lubricating 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
    • C10M117/04—Lubricating 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 containing hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/124—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms containing hydroxy groups; Ethers thereof
    • C10M2207/1245—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms containing hydroxy groups; Ethers thereof used as thickening agent
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
    • C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/32—Esters of carbonic acid
    • 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
    • C10M2207/32—Esters of carbonic acid
    • C10M2207/325—Esters of carbonic acid used as base 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
    • C10N2010/00—Metal present as such or in compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/02—Groups 1 or 11
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • 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
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/16—Dielectric; Insulating oil or insulators
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/17—Electric or magnetic purposes for electric contacts
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/175—Pantographs, i.e. printing devices
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/18—Electric or magnetic purposes in connection with recordings on magnetic tape or disc
    • 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
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/185—Magnetic fluids
    • 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
    • C10N2040/30—Refrigerators lubricants or compressors lubricants
    • 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
    • C10N2040/32—Wires, ropes or cables lubricants
    • 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
    • C10N2040/34—Lubricating-sealants
    • 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
    • C10N2040/36—Release agents or mold release agents
    • 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
    • C10N2040/38—Conveyors or chain belts
    • 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
    • C10N2040/40—Generators or electric motors in oil or gas winning field
    • 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
    • C10N2040/42—Flashing oils or marking oils
    • 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
    • C10N2040/44—Super vacuum or supercritical use
    • 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
    • C10N2040/50—Medical uses

Definitions

  • the present invention relates to a bearing grease composition for hard disc drive or the like. More particularly, the invention relates to a bearing grease composition for spindle motors which are used under clean environment, as in memories such as hard disc drive (HDD) or floppy disc drive (FDD) in computers.
  • HDD hard disc drive
  • FDD floppy disc drive
  • performances required for a bearing grease composition used in memories, for examples, HDD or FDD in computers are that dust generation (scatter) is low, torque is small, acoustic performance is excellent and life is long.
  • dust generation scatter
  • torque is small
  • acoustic performance is excellent and life is long.
  • fine particles of gaseous oil or grease scattered from the inside of a bearing during revolution contaminates the surface of a disc, resulting in cause of wrong operation. Therefore, it is considered to be most important to suppress the amount of scatter.
  • a sodium complex soap-based grease comprising a mineral oil as a base oil or a lithium soap-based grease comprising as a base oil, a synthetic ester (diester oil or polyol ester oil) which is a reaction product of an organic acid and an alcohol has conventionally been used as HDD bearing grease.
  • a synthetic ester diester oil or polyol ester oil
  • the sodium complex soap-based grease comprising a mineral oil as a base oil has been used for a long time with appreciation that the amount of scatter is small.
  • the grease had the problems that dispersion of a thickening agent in the grease is poor, and it is difficult to form a homogeneous mixture, so that acoustic and vibrating performances during evolution of the bearing is not good; moisture absorption is high, and the grease cures with the passage of time, so that flowability of the grease in the bearing becomes poor, causing defective lubrication.
  • the lithium soap-based grease comprising as a base oil, a synthetic ester (diester or polyol ester oil) which is a reaction product of an organic acid and an alcohol had no problem due to that dispersibility of the lithium soap is good, and low torque property was good.
  • a synthetic ester diester or polyol ester oil
  • the lithium soap-based grease tends to scatter,and if the grease is used as it is, there is the great possibility to damage a hard disc. Therefore, in order to prevent the damage, the grease is used in combination with an expensive magnetic fluid seal which is used in a motor. This rather results in increase of cost of a motor and prevents the motor from being miniaturized. Further, for example, due to the demand of high speed revolution and high precision of the motor, this grease does not sufficiently withstand acoustic performance and torque, disorder has sometimes occurred in acoustic performance or torque.
  • an object of the present invention is to provide a grease composition which can maintain stable low torque property, low noise property and low scatter property even at high speed revolution.
  • a bearing grease composition comprising:
  • the branched alkyl group R and R' in the carbonate compound represented by the formula (I) is represented by the following formula (II): wherein n is a number of 13 to 15 and m is a number of 0 to 6.
  • the bearing grease composition of the present invention preferably comprises 70 to 95 parts by weight of component (a) of the carbonate compound, and 5 to 30 parts by weight of component (b) of the alkali metal salt and/or alkaline earth metal salt .
  • component (b) of the alkali metal salt and/or alkaline earth metal salt is less than 5 parts by weight, a worked penetration becomes soft, and as a result, the grease composition leaks or scatters during revolution of a bearing, resulting in possibility of contaminating HDD, FDD and the like.
  • the bearing grease composition according to the present invention can contain, in addition to the components (a) and (b) described above, lubricants other than the component (a), and various additives, as a third component.
  • Examples of the lubricants used in the present invention include mineral oils, synthesized hydrocarbon oils, ether oils and ester oils, which are generally used as a base oil of grease compositions.
  • the additives used in the present invention are additives generally used in grease composition, and the examples thereof include antioxidants and rust inhibitors.
  • the grease composition of the present invention may further contain one or more of thickening agents.
  • the carbonate compound can be used alone or as mixtures thereof.
  • this carbonate is hereinafter referred to as "carbonate oil A” alone, or a mixed oil of a carbonate containing commercially available organic carbonate having different structure of an alkyl group (CYCRANT T-394, trade name, a product of Mitsui Petrochemical Industries, Ltd.) (this ester is hereinafter referred to as "carbonate ester oil B") and the carbonate ester oil A was mixed with lithium stearate and/or lithium 12 hydroxystearate in the proportions as shown in Table 1 such that the sum of those was 100 mass%.
  • the resulting mixture was heated to 220-230 °C while stirring until the whole of mixture became liquid.
  • the liquid thus obtained was poured into a stainless steel vessel at a depth of 3-5 mm.
  • the liquid was cooled at 50 °C or less and then homogenized with three rollers to obtain a grease composition.
  • Grease compositions were obtained in the same manner as in Examples 1 to 6 above except that an alkyl diphenyl ether or a polyol ester was further used as a third component other than components (a) and (b) in the proportion as shown in Table 1.
  • Grease compositions were obtained in the same manner as in Examples 1-6 except that a base oil and a lithium soap were used in the proportions as shown in Table 2.
  • the worked penetration was measured according to JIS K2220, 5.3, and the dropping point was measured according to JIS K2220, 5.4.
  • the motor characteristic test was conducted such that a bearing having included therein a grease composition to be tested was incorporated in a spindle motor, the motor was rotated at 10,000 rpm at a normal temperature, and noise generated, amount of evaporation (scatter) and rotating torque were measured.
  • Noise was measured with a microphone at a place which is 30 cm apart from a hub edge of the motor during rotation of motor.
  • the amount of evaporation (scatter) was determined by the difference between weight of motor before rotation and weight of motor after rotation.
  • the torque was determined by measuring electric current value at the rotation of motor with an ammeter, and the torque stability was determined by the difference between the maximum electric current value and the minimum electric current value.
  • the bearing grease composition of the present invention shows low evaporation (scatter), low noise, low torque property and stable torque.

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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)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Lubricants (AREA)
EP99115246A 1998-08-22 1999-08-02 Composition de graisse pour pallier Expired - Lifetime EP0987312B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10274238A JP2000063874A (ja) 1998-08-22 1998-08-22 Ｈｄｄ用等軸受グリース組成物
JP27423898 1998-08-22

Publications (2)

Publication Number Publication Date
EP0987312A1 true EP0987312A1 (fr) 2000-03-22
EP0987312B1 EP0987312B1 (fr) 2004-06-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99115246A Expired - Lifetime EP0987312B1 (fr) 1998-08-22 1999-08-02 Composition de graisse pour pallier

Country Status (4)

Country Link
US (3) US20020111279A1 (fr)
EP (1) EP0987312B1 (fr)
JP (1) JP2000063874A (fr)
DE (1) DE69918007T2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083213A1 (fr) * 1999-09-08 2001-03-14 Minebea Co., Ltd. Composition de graisse pour palier d'un moteur
EP1083353A3 (fr) * 1999-09-08 2003-05-14 Minebea Co., Ltd. Palier à faible ondulation de couple, à faible bruit et à durée de vie élevée
EP1083352A3 (fr) * 1999-09-08 2003-05-14 Minebea Co., Ltd. Palier pour moteur électrique à haut rendement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3978998B2 (ja) * 2000-11-14 2007-09-19 日本精工株式会社 転がり軸受
JP2002265970A (ja) 2001-03-14 2002-09-18 Koyo Seiko Co Ltd グリース組成物およびそのグリース組成物で潤滑した転がり軸受
CN101473021B (zh) * 2006-06-15 2012-07-18 日本电产株式会社 防止润滑剂劣化的方法、润滑剂和动压轴承装置
US7998913B2 (en) * 2007-06-11 2011-08-16 Hitachi Global Storage Technologies Netherlands B.V. Flow modifiers for improved magnetic recording device
CN102796589A (zh) * 2012-07-24 2012-11-28 北京金骄生物质化工有限公司 一种环境友好合成润滑油及其制备方法

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US2739127A (en) * 1952-07-02 1956-03-20 Exxon Research Engineering Co Lubricating grease containing organic carbonates
EP0482693A1 (fr) * 1990-10-19 1992-04-29 AGIP PETROLI S.p.A. Compositions lubrifiantes pour traction d'automobiles
US5714444A (en) * 1994-11-18 1998-02-03 Nsk Ltd. Grease composition

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JPS6044593A (ja) * 1983-08-23 1985-03-09 Idemitsu Kosan Co Ltd 汎用グリ−ス組成物
IT1230064B (it) * 1989-04-18 1991-09-27 Euron Spa Fluido lubrificante per la laminazione a freddo dell'acciaio.
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JP2000063874A (ja) 2000-02-29
DE69918007T2 (de) 2005-07-07
EP0987312B1 (fr) 2004-06-16
US20020111279A1 (en) 2002-08-15
US20030013622A1 (en) 2003-01-16
US20050054544A1 (en) 2005-03-10
DE69918007D1 (de) 2004-07-22

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