JP3290752B2 - Grease composition - Google Patents

Grease composition

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Publication number
JP3290752B2
JP3290752B2 JP11835993A JP11835993A JP3290752B2 JP 3290752 B2 JP3290752 B2 JP 3290752B2 JP 11835993 A JP11835993 A JP 11835993A JP 11835993 A JP11835993 A JP 11835993A JP 3290752 B2 JP3290752 B2 JP 3290752B2
Authority
JP
Japan
Prior art keywords
grease
oil
scattering
grease composition
thickener
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.)
Expired - Lifetime
Application number
JP11835993A
Other languages
Japanese (ja)
Other versions
JPH06330070A (en
Inventor
道治 中
淳 倉石
賢一 磯
哲夫 土谷
幸洋 尾崎
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.)
NSK Ltd
Showa Shell Sekiyu KK
Original Assignee
NSK Ltd
Showa Shell Sekiyu KK
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 NSK Ltd, Showa Shell Sekiyu KK filed Critical NSK Ltd
Priority to JP11835993A priority Critical patent/JP3290752B2/en
Priority to GB9410283A priority patent/GB2278612B/en
Publication of JPH06330070A publication Critical patent/JPH06330070A/en
Application granted granted Critical
Publication of JP3290752B2 publication Critical patent/JP3290752B2/en
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
    • 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
    • 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
    • C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
    • C10M2203/06—Well-defined aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • 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
    • C10M2205/026—Butene
    • 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
    • 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
    • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
    • C10M2207/1225—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic 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
    • C10M2207/121—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
    • C10M2207/126—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 monocarboxylic
    • C10M2207/1265—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 monocarboxylic used as thickening agent
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
    • C10M2207/1285—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof used as thickening agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/129—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of thirty or more carbon atoms
    • 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
    • C10M2207/16—Naphthenic acids
    • C10M2207/166—Naphthenic acids 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/18—Tall oil acids
    • C10M2207/186—Tall oil acids 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/20—Rosin acids
    • C10M2207/206—Rosin acids 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
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/24—Epoxidised acids; Ester derivatives thereof
    • C10M2207/246—Epoxidised acids; Ester derivatives thereof used as thickening 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
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/02—Bearings

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】この発明は、飛散性，摩擦トルク
性能，音響性能に優れたグリース組成物に係り、特に、
電子計算機軸受に好適なグリース組成物に関する。 BACKGROUND OF THE INVENTION This invention, scattering properties, friction torque
For grease compositions with excellent performance and acoustic performance,
The present invention relates to a grease composition suitable for a computer bearing.

【０００２】[0002]

【従来の技術】電子計算機軸受用グリース組成物に対す
る要求性能としては、飛散量が少ないこと、トルクが小
さいこと、音響性能が優れていることがあげられる。こ
の中で最大の要求性能は、軸受からのグリース飛散量の
少ないことである。飛散したグリースで記録媒体が汚損
されエラー発生の原因となるのを避けるためである。2. Description of the Related Art Performance requirements for grease compositions for computer bearings include a small amount of scattering, a small torque, and excellent acoustic performance. Among them, the greatest required performance is that the amount of grease scattered from the bearing is small. This is to prevent the recording medium from being soiled by the scattered grease and causing an error.

【０００３】従来の電子計算機軸受用グリース組成物と
しては、アンドックＣ（商品名）として良く知られたナ
トリウム石けん系グリース（鉱油を基油とし、増ちょう
剤にナトリウムコンプレックス石けんを用いたナトリウ
ムコンプレックス石けん−鉱油系グリース）が、その飛
散性を評価されて２０年以上にわたり殆ど独占的に使用
されてきた。[0003] As a conventional grease composition for computer bearings, there is known a sodium soap-based grease (mineral oil as a base oil and a sodium complex soap using a sodium complex soap as a thickener) well-known as ANDOK C (trade name). Mineral oil-based greases) have been used almost exclusively for over 20 years because of their dispersibility.

【０００４】また、最近の代表的な先行技術としては、
特開平５−９４８９号公報に示されたものがある。[0004] Recent representative prior arts include:
There is one disclosed in JP-A-5-9489.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、ナトリ
ウムコンプレックス石けん−鉱油系グリースは、石けん
のグリース中での分散が悪く、均質でないため軸受回転
初期における音響・振動性能が良くない。さらに、ナト
リウムコンプレックス石けんは吸水性が強く、時間の経
過とともにグリースが硬化して軸受中での流動性が悪く
なり、潤滑不良を来して軸受の保持器音が発生し易くな
るという問題点があった。However, sodium complex soap-mineral oil grease has poor sound and vibration performance in the initial stage of bearing rotation because the soap is not well dispersed in the grease and is not homogeneous. In addition, sodium complex soap has a strong water absorption property, and the grease hardens with the lapse of time, and the fluidity in the bearing deteriorates, resulting in poor lubrication and easy generation of bearing cage noise. there were.

【０００６】そのため、特に低騒音・低振動が重視され
る場合は、リチウム石けん−エステル系グリースに代表
される低騒音・低トルクグリースが使用されている。し
かしこのリチウム石けん−エステル系グリースは、飛散
し易く、そのまま使用した場合は記録媒体を汚損するお
それが大きいという問題点があった。その飛散を防止す
るため磁性流体シールと併用することもおこなわれる
が、高価で製品のコストアップを招くとともに、磁性流
体シールの取付スペースが必要で小型化の妨げになる。[0006] Therefore, when low noise and low vibration are particularly important, low noise and low torque grease represented by lithium soap-ester grease is used. However, this lithium soap-ester grease has a problem that it is easily scattered, and when used as it is, there is a great possibility that the recording medium is stained. In order to prevent the scattering, the magnetic fluid seal may be used in combination, but it is expensive and causes an increase in the cost of the product, and a space for mounting the magnetic fluid seal is required, which hinders miniaturization.

【０００７】また、特開平５−９４８９号公報の技術
は、４０℃において８〜１８０ｃＳｔの動粘度を有する
鉱油，合成炭化水素油およびポリフェニルエーテル油の
群から選ばれた少なくとも１種の基油７０〜８０ｗｔ％
と、化学構造式中に水酸基を含まないＣ12〜Ｃ24高級脂
肪酸のリチウム塩２０〜３０ｗｔ％とを含有し、特定の
防錆剤を加えた電子計算機用グリース組成物である。し
かしこの技術は、常温で優れた飛散性を示すが電子計算
機用軸受の最大使用温度である約７０℃の高温で飛散量
が多くなるという欠点があった。Further, the technique disclosed in Japanese Patent Application Laid-Open No. Hei 5-9489 discloses at least one base oil selected from the group consisting of a mineral oil, a synthetic hydrocarbon oil and a polyphenyl ether oil having a kinematic viscosity of 8 to 180 cSt at 40 ° C. 70-80wt%
And a lithium salt of a C 12 -C 24 higher fatty acid containing no hydroxyl group in the chemical structural formula, and 20 to 30 wt%, and a grease composition for an electronic computer to which a specific rust inhibitor is added. However, this technique exhibits excellent scattering properties at room temperature, but has the disadvantage that the amount of scattering increases at a high temperature of about 70 ° C., which is the maximum operating temperature of bearings for electronic computers.

【０００８】そこで本発明は、従来技術における常温で
の優れた飛散性を維持し、かつ約７０℃の高温でも飛散
量が少なく、しかも音響特性，トルク性能も共に優れて
いる電子計算機軸受に好適なグリース組成物を提供する
ことを目的としている。Accordingly, the present invention is suitable for a computer bearing which maintains the excellent scattering properties at ordinary temperature in the prior art, has a small amount of scattering even at a high temperature of about 70 ° C., and is excellent in both acoustic characteristics and torque performance. It is intended to provide a suitable grease composition.

【０００９】[0009]

【課題を解決するための手段】前記目的を達成するた
め、本発明は次のような構成からなる。すなわち、本発
明に係る請求項１に記載のグリース組成物は、４０℃に
おいて８〜１８０ｃＳｔの動粘度を有する鉱油および合
成炭化水素油から選ばれた少なくとも１種の基油７０〜
８０ｗｔ％と、増ちょう剤２０〜３０ｗｔ％と、を含有
してなり、不混和ちょう度が１９０〜２５０であり、前
記増ちょう剤は、化学構造式中に１個の水酸基を含むＣ
12〜Ｃ24の高級脂肪酸のリチウム塩１０〜４０ｗｔ％
と、化学構造式中に水酸基を含まないＣ12〜Ｃ24の高級
脂肪酸のリチウム塩６０〜９０ｗｔ％と、で構成される
ことを特徴とする。また、本発明に係る請求項２に記載
のグリース組成物は、請求項１に記載のグリース組成物
において、前記基油が鉱油３０〜７０ｗｔ％および合成
炭化水素油３０〜７０ｗｔ％からなることを特徴とす
る。さらに、本発明に係る請求項３に記載のグリース組
成物は、請求項１又は２に記載のグリース組成物におい
て、前記基油の４０℃における動粘度を１６〜１００ｃ
Ｓｔとしたことを特徴とする。In order to achieve the above object, the present invention has the following arrangement. That is, the grease composition according to claim 1 according to the present invention has at least one base oil selected from a mineral oil and a synthetic hydrocarbon oil having a kinematic viscosity of 8 to 180 cSt at 40 ° C.
80 wt% and a thickener of 20 to 30 wt%, the immiscible consistency is 190 to 250, and the thickener contains one hydroxyl group in the chemical structural formula.
12 -C lithium salts of higher fatty acids 24 10 to 40 wt%
And 60 to 90 wt% of a lithium salt of a C 12 -C 24 higher fatty acid containing no hydroxyl group in the chemical structural formula. The grease composition according to claim 2 of the present invention is characterized in that, in the grease composition according to claim 1, the base oil is composed of 30 to 70 wt% of a mineral oil and 30 to 70 wt% of a synthetic hydrocarbon oil. Features. Furthermore, the grease composition according to claim 3 according to the present invention is characterized in that, in the grease composition according to claim 1 or 2, the kinematic viscosity of the base oil at 40 ° C is 16 to 100 c.
St.

【００１０】さらに、本発明に係る請求項４に記載のグ
リース組成物は、請求項１〜３のいずれかに記載のグリ
ース組成物において、用途を電子計算機軸受用としたこ
とを特徴とする。 Further, the grease composition according to claim 4 of the present invention is the grease composition according to any one of claims 1 to 3, wherein the grease composition is used for a bearing for an electronic computer.
And features.

【００１１】[0011]

【作用】本発明のグリース組成物は増ちょう剤にリチウ
ム石けんを用いている。リチウム石けんは増ちょう剤の
中でも比較的潤滑性が良く、グリース中で均一かつ十分
に分散することにより優れた軸受の音響特性・トルク性
能が得られる。また、増ちょう剤を短繊維構造としたう
え、化学構造式中に水酸基を含まないリチウム石けん
（以後、リチウム石けん（Ａ）と呼ぶ）と化学構造式中
に１個の水酸基を含むリチウム石けん（以後、リチウム
石けん（Ｂ）と呼ぶ）とを混合して用いた。そのため、
リチウム石けんと基油によるミセル構造がより安定化
し、緻密な構造が得られるためグリースの離油度を低減
できる。その結果、グリースの飛散量は少なくなった。
しかし、グリースの離油度が小さくても、リチウム石け
ん（Ａ）とリチウム石けん（Ｂ）との混合比率が所定の
範囲でなければ７０℃の温度条件での飛散量は大幅には
少なくならないことが分かった。The grease composition of the present invention uses lithium soap as a thickener. Lithium soap has relatively good lubricity among thickeners, and excellent acoustic properties and torque performance of a bearing can be obtained by uniformly and sufficiently dispersing it in grease. In addition, the thickener has a short fiber structure, and lithium soap having no hydroxyl group in the chemical structural formula (hereinafter referred to as lithium soap (A)) is referred to as lithium soap having one hydroxyl group in the chemical structural formula ( Hereafter, lithium soap (B) will be used. for that reason,
The micellar structure of lithium soap and base oil is more stabilized, and a dense structure is obtained, so that the degree of oil release of grease can be reduced. As a result, the amount of grease scattered was reduced.
However, even if the degree of oil release of the grease is small, the amount of scattering under the temperature condition of 70 ° C. is not significantly reduced unless the mixing ratio of the lithium soap (A) and the lithium soap (B) is within a predetermined range. I understood.

【００１２】特に、増ちょう剤中のリチウム石けん
（Ｂ）の混合比率が増えると、ちょう度収率が高くなり
硬いグリースとなるため、音響・トルク性能に問題が生
じてくる。本発明者らは、リチウム石けんグリースの増
ちょう剤量を通常より多くするとともに、短繊維構造と
することが有効であることを見いだしていたが、今回、
増ちょう剤にリチウム石けん（Ａ）とリチウム石けん
（Ｂ）を、基油に鉱油と合成炭化水素油あるいはそれら
の混合油を用いることにより、高温での飛散性に優れた
本発明のグリース組成物に至った。In particular, when the mixing ratio of lithium soap (B) in the thickener increases, the consistency yield increases and the grease becomes hard, which causes a problem in sound and torque performance. The present inventors have found that it is effective to increase the thickening agent amount of lithium soap grease than usual and to have a short fiber structure.
By using lithium soap (A) and lithium soap (B) as a thickener and mineral oil and synthetic hydrocarbon oil or a mixed oil thereof as a base oil, the grease composition of the present invention is excellent in flying property at high temperatures. Reached.

【００１３】本発明のグリース組成物に使用される基油
としては、鉱油と合成炭化水素油を単独に又は混合して
用いることができる。両者を混合して用いると、特に高
温時のグリース飛散性が良くなる。なお、両者の混合比
率は鉱油が３０〜７０ｗｔ％が好ましく、鉱油が約５０
ｗｔ％のときが最も好ましい。鉱油はいわゆる石油から
の高度精製油が望ましいが、粘度指数は問わない。合成
炭化水素油としてはポリαオレフィン、液状ポリブテン
などのオレフィン重合油およびアルキル芳香族油のいず
れも使用できる。その中では、ポリαオレフィン例えば
１−Ｄｅｃｅｎｅ（CH3(CH2)7CH=CH2 ) のオリゴマーや
エチレンとポリαオレフィンとの共重合体などが好まし
い。As the base oil used in the grease composition of the present invention, mineral oil and synthetic hydrocarbon oil can be used alone or as a mixture. When both are used in combination, the grease scattering property particularly at high temperatures is improved. The mixing ratio of the two is preferably 30 to 70 wt% for mineral oil, and about 50% for mineral oil.
Most preferably, it is wt%. The mineral oil is desirably a highly refined oil derived from petroleum, but the viscosity index is not limited. As the synthetic hydrocarbon oil, any of olefin polymerized oil such as poly-α-olefin and liquid polybutene and alkyl aromatic oil can be used. Among them, a poly-α-olefin such as an oligomer of 1-decene (CH 3 (CH 2 ) 7 CH = CH 2 ) or a copolymer of ethylene and a poly-α-olefin is preferred.

【００１４】本発明のグリース組成物に用いる基油の粘
度については、４０℃において８〜１８０ｃＳｔの動粘
度を有するものが使用可能である。８ｃＳｔ未満では高
温で蒸発しやすく、グリースの製造が困難であり、一
方、１８０ｃＳｔを超えると摩擦トルクを増大させるだ
けでなく飛散量も増加するので好ましくない。本発明者
らの研究によれば、どちらかといえば基油粘度は低い方
が飛散性の点で有利であることが確認されており、その
点を考慮すれば４０℃における粘度として１６〜１００
ｃＳｔが好ましいといえる。With respect to the viscosity of the base oil used in the grease composition of the present invention, those having a kinematic viscosity of 8 to 180 cSt at 40 ° C. can be used. If it is less than 8 cSt, it tends to evaporate at a high temperature and it is difficult to produce grease. According to the study of the present inventors, it has been confirmed that a base oil having a relatively low viscosity is more advantageous in terms of dispersibility, and in consideration of this, the viscosity at 40 ° C. is 16 to 100.
It can be said that cSt is preferable.

【００１５】本発明のグリース組成物に使用される増ち
ょう剤は、分散性が良く良好な音響性能が得やすいＣ12
〜Ｃ24の高級脂肪酸のリチウム塩である。その高級脂肪
酸塩としては、例えばステアリン酸リチウムや牛脂脂肪
酸リチウム塩などのような化学構造式中に水酸基を含ま
ないリチウム石けん（Ａ）と１２−ヒドロキシステアリ
ン酸リチウムのような１個の水酸基を含むリチウム石け
ん（Ｂ）とを所定の比率で混合して用いることが必要で
ある。なぜならば、ステアリン酸リチウムと１２−ヒド
ロキシステアリン酸リチウムを所定の混合比率の範囲で
適当に組み合わせて用いることにより高温時の飛散量を
かなり減少させることができるからである。１個の水酸
基を含むリチウム石けん（Ｂ）の混合比率が大きくなり
過ぎると、特に高温時の飛散量が顕著に増える。The thickener used in the grease composition of the present invention has good dispersibility easy to obtain good acoustic performance C 12
It is a lithium salt of a higher fatty acid of ~C 24. The higher fatty acid salt includes, for example, lithium soap (A) having no hydroxyl group in a chemical structural formula such as lithium stearate and lithium tallow fatty acid salt, and one hydroxyl group such as lithium 12-hydroxystearate. It is necessary to mix and use lithium soap (B) at a predetermined ratio. This is because the use of lithium stearate and lithium 12-hydroxystearate in an appropriate combination within a predetermined mixing ratio can significantly reduce the amount of scattering at high temperatures. If the mixing ratio of the lithium soap (B) containing one hydroxyl group becomes too large, the amount of scattering particularly at high temperature increases remarkably.

【００１６】本発明のグリース組成物に用いるＣ12〜Ｃ
24の高級脂肪酸のリチウム塩からなる増ちょう剤は、基
油に対する配合量がグリース組成物の飛散性に影響を及
ぼす。従来のリチウム石けん系グリースでは、増ちょう
剤の配合量は、８〜１８ｗｔ％が一般的である。これに
対して本発明の場合は、実験結果に基づいて増ちょう剤
の配合量を２０〜３０ｗｔ％の範囲にしている。好まし
くは、２３〜２７重量％である。たとえば増ちょう剤の
混合量が３０ｗｔ％を上回ったり２０ｗｔ％を下回った
場合は高温時の飛散性が悪くなる。さらにリチウム石け
ん系増ちょう剤の配合量は、グリース組成物の飛散性の
みでなく、音響・トルク性能の向上にも重要な要素であ
る。C 12 -C used in the grease composition of the present invention
The thickener comprising the lithium salt of the higher fatty acid of No. 24 affects the dispersibility of the grease composition depending on the blending amount with respect to the base oil. In the conventional lithium soap-based grease, the compounding amount of the thickener is generally 8 to 18 wt%. On the other hand, in the case of the present invention, the compounding amount of the thickener is set in the range of 20 to 30 wt% based on the experimental results. Preferably, it is 23 to 27% by weight. For example, when the mixing amount of the thickener is more than 30 wt% or less than 20 wt%, the scattering property at high temperature becomes poor. Further, the blending amount of the lithium soap-based thickener is an important factor not only for the flyability of the grease composition but also for improving the sound and torque performance.

【００１７】グリースの飛散は軸受の回転により発生し
たグリースの微粒子が飛び散るものであり、飛散性を向
上させるために適度の硬さのグリースが要求される。一
方、グリースはあまり硬いと軸受内部での流動性が低下
し、保持器音が発生するなど悪影響を及ぼす。つまりグ
リースの硬さは飛散性や音響性能に非常に関係する因子
でもある。そこで、本発明者らはグリース組成物のちょ
う度についても検討を加えた結果、不混和ちょう度を１
９０〜２５０の範囲とすることが望ましいとの結論を得
た。不混和ちょう度が１９０未満であると硬すぎて音響
・トルク性能が顕著に悪化する。一方、ちょう度が２５
０を超えると飛散量が増加して、電子計算機の記録媒体
が汚損される。The grease is scattered because grease particles generated by the rotation of the bearing are scattered, and grease having an appropriate hardness is required to improve the scatterability. On the other hand, if the grease is too hard, the fluidity inside the bearing is reduced, and adverse effects such as generation of retainer noise are caused. In other words, the hardness of the grease is also a factor that is greatly related to the scattering property and the acoustic performance. Then, the present inventors also examined the consistency of the grease composition and found that the immiscible consistency was 1%.
It was concluded that it is desirable to be in the range of 90 to 250. If the degree of immiscibility is less than 190, it is too hard and the sound / torque performance is remarkably deteriorated. On the other hand, the consistency is 25
If it exceeds 0, the scattering amount increases, and the recording medium of the electronic computer is soiled.

【００１８】[0018]

【実施例】次に、本発明の実施例と比較例について説明
する。表１，表２に示す実施例１〜１８のグリース組成
物と表３に示す比較例１〜１５のグリース組成物を用い
て、ちょう度，飛散量，軸受音響，トルク等を測定し
た。Next, examples of the present invention and comparative examples will be described. Using the grease compositions of Examples 1 to 18 shown in Tables 1 and 2 and the grease compositions of Comparative Examples 1 to 15 shown in Table 3, the consistency, scattering amount, bearing sound, torque, and the like were measured.

【００１９】[0019]

【表１】 [Table 1]

【００２０】[0020]

【表２】 [Table 2]

【００２１】[0021]

【表３】 [Table 3]

【００２２】ちょう度は不混和ちょう度と混和ちょう度
とをＪＩＳ Ｋ２２２０（５．３）により測定し、離油
度はＪＩＳ Ｋ２２２０（５．７）により測定した。飛
散量，軸受音響，トルクの各物性値の測定は、有機溶媒
により完全に脱脂した内径５mm，外径１４mmの非接触ゴ
ムシール付単列深みぞ玉軸受に被検体のグリース組成物
を１９ｍｇ封入し、予圧1.5 Kgｆで常温（約２５℃）お
よび７０℃（飛散量のみ）の条件下で行った。The consistency was determined by measuring the immiscibility and the mixing consistency according to JIS K2220 (5.3), and the oil separation was measured according to JIS K2220 (5.7). The measurement of the physical properties such as the amount of scattering, bearing sound, and torque was performed by filling 19 mg of the grease composition of the subject in a single-row deep groove ball bearing with a non-contact rubber seal of 5 mm in inner diameter and 14 mm in outer diameter completely degreased with an organic solvent. And a preload of 1.5 Kgf at normal temperature (about 25 ° C.) and 70 ° C. (only the amount of scattering).

【００２３】飛散量測定装置の概要を図１に示す。この
装置を室温または７０℃の条件下に置き、グリース組成
物を封入した軸受Ａを３６００ｒｐｍで２０分間回転さ
せながら、図１の容器Ｂ中に清浄空気を流し、0.01cfの
体積の空気量毎にその中に含まれた0.3 μｍ以上の飛散
物の数をパーティクルカウンターを用いて測定した。表
１，表２および表３には軸受回転２０分後の飛散量を示
した。FIG. 1 shows an outline of the scattering amount measuring apparatus. The apparatus was placed under the condition of room temperature or 70 ° C., and while rotating the bearing A containing the grease composition at 3600 rpm for 20 minutes, clean air was flowed into the container B of FIG. The number of scattered particles of 0.3 μm or more contained therein was measured using a particle counter. Tables 1, 2 and 3 show the scattering amounts after 20 minutes of bearing rotation.

【００２４】軸受の音響測定は、アンデロンメータを用
い、１８００ｒｐｍで被検体軸受を回転させたときの保
持器音の有無を聴覚にて判定した。判定結果を、保持器
音が発生しないときは○、ほとんど発生しないときは
△、ときどきもしくは常時発生するときは×で表示し
た。トルク測定装置の概略を図２に示す。被検体軸受Ａ
を３６００ｒｐｍで回転させストレインゲージＣを用い
て測定したトルク値をレコーダに記録し、回転１０分後
のトルクがほぼ安定した時の値を表１，表２および表３
に示した。なお、図２において、Ｄはエアスピンドル、
Ｅはアーバ、Ｆはアルミキャップ、Ｇはエアベアリング
である。The acoustic measurement of the bearing was performed by using an Anderon meter, and the presence or absence of the retainer sound when the subject bearing was rotated at 1800 rpm was judged by hearing. The judgment results are indicated by ○ when no cage sound is generated, Δ when hardly generated, and × when occasionally or constantly generated. FIG. 2 shows an outline of the torque measuring device. Subject bearing A
Was rotated at 3600 rpm, and the torque value measured using the strain gauge C was recorded on the recorder. The values when the torque was almost stabilized after 10 minutes of rotation were shown in Tables 1, 2 and 3.
It was shown to. In FIG. 2, D is an air spindle,
E is an arbor, F is an aluminum cap, and G is an air bearing.

【００２５】実施例１〜１８のグリースは、どのグリー
ス組成物も全て飛散性，音響性能ともに良好であったの
に対して、比較例１〜１５のグリースは飛散性，音響性
能の少なくともいずれかに問題があった。以下、増ちょ
う剤，基油の動粘度，基油の種別，基油と増ちょう剤と
の比率，ちょう度等とグリース組成物との関連につい
て、各表中のデータを比較検討してみる。The greases of Examples 1 to 18 were all good in both the scattering property and the acoustic performance, whereas the greases of Comparative Examples 1 to 15 were at least one of the scattering property and the acoustic performance. Had a problem. The data in the tables below are compared and examined for the relationship between the thickener, the kinematic viscosity of the base oil, the type of the base oil, the ratio of the base oil to the thickener, the consistency, and the grease composition. .

【００２６】増ちょう剤に関しては、ステアリン酸リチ
ウムと１２−ヒドロキシステアリン酸リチウムをそれぞ
れ単独で用いた比較例１，４，７，８，１０，１１と両
者を混合して用いた実施例１〜１８とを比較すると、実
施例の方が７０℃の時の飛散量が比較例よりかなり少な
くなっている。特に、１２−ヒドロキシステアリン酸リ
チウムを単独で用いた比較例４は、２５℃の時の飛散量
も遙に多くなっており、単独での使用は不適当である。
また、増ちょう剤中の１２−ヒドロキシステアリン酸リ
チウムの比率が大きくなると飛散量が増え、増ちょう剤
中のこの比率が７０％の比較例２，３は実施例１，４，
７，８，１３と比較すると離油度は小さいが７０℃での
飛散量がなり多くなっている。また、ステアリン酸リチ
ウムと１２−ヒドロキシステアリン酸リチウムとをある
範囲内の混合比率で混合して用いることにより、７０℃
での飛散量を少なくすることができた。これは、リチウ
ム石けん（Ａ）とリチウム石けん（Ｂ）を適度に混合し
たことにより、緻密で安定したグリース構造が得られた
ためであると考えられる。As to the thickener, Comparative Examples 1, 4, 7, 8, 10, and 11 using lithium stearate and lithium 12-hydroxystearate alone, and Examples 1 to 4 using a mixture of both were used. In comparison with No. 18, the amount of scattering at 70 ° C. in the example is considerably smaller than that in the comparative example. In particular, in Comparative Example 4 using lithium 12-hydroxystearate alone, the amount of scattering at 25 ° C. was much larger, and it was inappropriate to use it alone.
Further, when the ratio of lithium 12-hydroxystearate in the thickener increases, the amount of scattering increases. In Comparative Examples 2 and 3 where the ratio in the thickener is 70%, Examples 1 and 4,
Compared with 7, 8, and 13, the degree of oil separation is small, but the scattering amount at 70 ° C. is large. Further, by mixing lithium stearate and lithium 12-hydroxystearate at a mixing ratio within a certain range and using them, 70 ° C.
The amount of scatter at the site was reduced. This is presumably because lithium soap (A) and lithium soap (B) were appropriately mixed to obtain a dense and stable grease structure.

【００２７】基油の動粘度に関しては、４０℃における
動粘度が８〜１８０ｃＳｔである実施例１〜８と、４０
℃における動粘度を２００ｃＳｔまで上げた比較例５と
を比べると、比較例は離油度は小さいが７０℃での飛散
量が多くなり、音響・トルク性能も実施例より劣ってい
る。基油の種別に関しては、鉱油，ポリαオレフィン油
あるいはそれらを混合して用いた実施例１〜１８は、常
温および７０℃の温度条件下において良好な飛散量を示
す。ジエステル油とポリオールエステル油を使用した比
較例１４，１５と比べても、実施例の方が格段に優れた
飛散量を示すことがわかる。この結果から、増ちょう剤
と同様に基油についても、鉱油，ポリαオレフィン油あ
るいはそれらの混合油を用いることが飛散量を減少させ
るのに有効であることが分かった。Regarding the kinematic viscosity of the base oil, Examples 1 to 8 in which the kinematic viscosity at 40 ° C. is 8 to 180 cSt,
When compared with Comparative Example 5 in which the kinematic viscosity at 200C was increased to 200 cSt, the oil separation degree of the Comparative Example was small, but the scattering amount at 70C was large, and the sound and torque performance was inferior to the Examples. With respect to the type of base oil, Examples 1 to 18 using mineral oil, poly-α-olefin oil or a mixture thereof show a good amount of scattering under normal temperature and 70 ° C temperature conditions. It can be seen that even in Comparative Examples 14 and 15 using the diester oil and the polyol ester oil, the Example shows a much superior scattering amount. From these results, it was found that the use of mineral oil, poly-α-olefin oil, or a mixed oil thereof was effective in reducing the amount of scattering for the base oil as well as the thickener.

【００２８】基油と増ちょう剤との比率に関しては、実
施例１２，１３と比較例６〜９とを比べると、増ちょう
剤にステアリン酸リチウムと１２−ヒドロキシステアリ
ン酸リチウムを混合して用いても、グリース中の増ちょ
う剤量が３５ｗｔ％の比較例６は音響・トルク性能に問
題があり、一方増ちょう剤量が１０ｗｔ％の比較例９は
飛散性に問題がある。この結果から、グリース中の増ち
ょう剤量が飛散・音響・トルク性能を良くするために重
要であることがわかる。With respect to the ratio between the base oil and the thickener, a comparison between Examples 12 and 13 and Comparative Examples 6 to 9 shows that a mixture of lithium stearate and lithium 12-hydroxystearate was used as the thickener. However, Comparative Example 6, in which the amount of the thickener in the grease is 35 wt%, has a problem in the sound and torque performance, whereas Comparative Example 9, in which the amount of the thickener is 10 wt%, has a problem in the scattering properties. From these results, it is understood that the amount of the thickener in the grease is important for improving the scattering, sound and torque performance.

【００２９】また、基油に鉱油とポリαオレフィンを、
増ちょう剤にステアリン酸リチウムと１２−ヒドロキシ
ステアリン酸リチウムをそれぞれ混合して用いた実施例
１４〜１８は、７０℃のときの飛散量が特に少なくなっ
ている。ちょう度に関しては、同一組成であってもちょ
う度が１９０〜２５０の範囲にある実施例１５と、ちょ
う度が２５０以上の比較例１２および１８０以下の比較
例１３とを比べると、比較例１２は７０℃の時の飛散量
が多くなり、比較例１３は音響・トルク性能が悪化して
いることがわかる。Further, mineral oil and poly-α-olefin are used as base oils,
In Examples 14 to 18 in which lithium stearate and lithium 12-hydroxystearate were mixed and used as the thickener, the amount of scattering at 70 ° C. was particularly small. Concerning the consistency, even when the consistency is the same, Example 15 in which the consistency is in the range of 190 to 250 is compared with Comparative Example 12 in which the consistency is 250 or more and Comparative Example 13 in which the consistency is 180 or less. Shows that the scattering amount at 70 ° C. is large, and it can be seen that the sound and torque performance of Comparative Example 13 is deteriorated.

【００３０】[0030]

【発明の効果】以上説明したように、本発明の電子計算
機軸受に好適なグリース組成物は、室温のみでなく、よ
り高温の７０℃の条件下でも優れた飛散性を示し、かつ
軸受の音響トルク性能に有効な成果が得られる。As described above, the grease composition suitable for the computer bearing of the present invention exhibits excellent scattering properties not only at room temperature but also at a higher temperature of 70.degree. Effective results for torque performance can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図１】飛散量測定装置の概略図である。FIG. 1 is a schematic diagram of a scattering amount measuring device.

【図２】トルク測定装置の概略図である。FIG. 2 is a schematic diagram of a torque measuring device.

【符号の説明】[Explanation of symbols]

Ａ （被検用）軸受 A (test) bearing

フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ１０Ｍ 117:04） Ｃ１０Ｍ 117:04） Ｃ１０Ｎ 10:02 Ｃ１０Ｎ 10:02 20:02 20:02 40:02 40:02 50:10 50:10 (72)発明者 土谷 哲夫 東京都千代田区霞が関３丁目２番５号 昭和シェル石油株式会社内 (72)発明者 尾崎 幸洋 東京都千代田区霞が関３丁目２番５号 昭和シェル石油株式会社内 (58)調査した分野(Int.Cl.7，ＤＢ名) C10M 169/02 Continued on the front page (51) Int.Cl. 7 Identification code FI C10M 117: 04) C10M 117: 04) C10N 10:02 C10N 10:02 20:02 20:02 40:02 40:02 50:10 50: 10 (72) Inventor Tetsuo Tsuchiya 3-2-5 Kasumigaseki, Chiyoda-ku, Tokyo Showa Shell Sekiyu KK (72) Inventor Yukihiro Ozaki 3-5-2 Kasumigaseki, Chiyoda-ku, Tokyo Showa Shell Sekiyu KK 58) Field surveyed (Int. Cl. 7 , DB name) C10M 169/02

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 ４０℃において８〜１８０ｃＳｔの動粘
度を有する鉱油および合成炭化水素油から選ばれた少な
くとも１種の基油７０〜８０ｗｔ％と、増ちょう剤２０
〜３０ｗｔ％と、を含有してなり、不混和ちょう度が１９０〜２５０であり、 前記増ちょう剤は、化学構造式中に１個の水酸基を含む
Ｃ12〜Ｃ24の高級脂肪酸のリチウム塩１０〜４０ｗｔ％
と、化学構造式中に水酸基を含まないＣ12〜Ｃ24の高級
脂肪酸のリチウム塩６０〜９０ｗｔ％と、で構成される
ことを特徴とするグリース組成物。1. 70 to 80 wt% of at least one base oil selected from a mineral oil and a synthetic hydrocarbon oil having a kinematic viscosity of 8 to 180 cSt at 40 ° C., and a thickener 20
And also contains a 30 wt%, a degree of non-worked penetration is 190 to 250, wherein the thickener is a lithium salt of a higher fatty acid C 12 -C 24 containing one hydroxy group in the chemical structural formula 10-40% by weight
And a lithium salt of a C 12 -C 24 higher fatty acid containing no hydroxyl group in the chemical structural formula, 60-90 wt%. 【請求項２】 前記基油が鉱油３０〜７０ｗｔ％および
合成炭化水素油３０〜７０ｗｔ％からなることを特徴と
する請求項１に記載のグリース組成物。2. The grease composition according to claim 1, wherein the base oil comprises 30 to 70% by weight of a mineral oil and 30 to 70% by weight of a synthetic hydrocarbon oil. 【請求項３】 前記基油の４０℃における動粘度を１６
〜１００ｃＳｔとしたことを特徴とする請求項１又は２
に記載のグリース組成物。3. The kinematic viscosity at 40 ° C. of the base oil is 16
3. The method according to claim 1, wherein the pressure is set to 100 cSt.
3. The grease composition according to item 1. 【請求項４】 用途を電子計算機軸受用としたことを特
徴とする請求項１〜３のいずれかに記載のグリース組成
物。 4. The invention is characterized in that it is used for electronic computer bearings.
The grease composition according to any one of claims 1 to 3, wherein
object.
JP11835993A 1993-05-20 1993-05-20 Grease composition Expired - Lifetime JP3290752B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11835993A JP3290752B2 (en) 1993-05-20 1993-05-20 Grease composition
GB9410283A GB2278612B (en) 1993-05-20 1994-05-20 Grease composition for bearings of electronic computers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11835993A JP3290752B2 (en) 1993-05-20 1993-05-20 Grease composition

Publications (2)

Publication Number Publication Date
JPH06330070A JPH06330070A (en) 1994-11-29
JP3290752B2 true JP3290752B2 (en) 2002-06-10

Family

ID=14734759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11835993A Expired - Lifetime JP3290752B2 (en) 1993-05-20 1993-05-20 Grease composition

Country Status (2)

Country Link
JP (1) JP3290752B2 (en)
GB (1) GB2278612B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3324628B2 (en) * 1994-11-18 2002-09-17 日本精工株式会社 Low dusting grease composition
JP3356194B2 (en) * 1995-02-07 2002-12-09 日本精工株式会社 Grease composition
JP3385458B2 (en) * 1998-09-09 2003-03-10 ミネベア株式会社 Spindle motor
US6232278B1 (en) 1998-12-22 2001-05-15 Kyodo Yushi Co., Ltd. Lubricating grease composition
JP4986341B2 (en) * 2001-06-11 2012-07-25 株式会社ジェイテクト Lubricating grease composition
US7998913B2 (en) 2007-06-11 2011-08-16 Hitachi Global Storage Technologies Netherlands B.V. Flow modifiers for improved magnetic recording device
CN103476911B (en) 2011-04-15 2016-06-22 Thk株式会社 Grease composition and motion guide device lubricated with the grease composition
JP6754565B2 (en) * 2015-01-21 2020-09-16 セイコーインスツル株式会社 Grease, rolling bearings, rolling bearing devices and information recording / playback devices
JP6858501B2 (en) * 2016-07-11 2021-04-14 セイコーインスツル株式会社 Grease, rolling bearings, rolling bearing devices and information recording / playback devices

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB652017A (en) * 1948-10-18 1951-04-11 Bataafsche Petroleum Improvements in or relating to lubricants
US2591586A (en) * 1950-09-30 1952-04-01 Standard Oil Dev Co High-temperature lubricating greases
US2810695A (en) * 1954-04-07 1957-10-22 Exxon Research Engineering Co Lubricating grease compositions containing polyethylene
GB785509A (en) * 1955-12-02 1957-10-30 Socony Mobil Oil Co Inc Grease composition
GB842661A (en) * 1957-08-27 1960-07-27 Socony Mobil Oil Co Inc Lubricating greases
GB1548165A (en) * 1975-07-11 1979-07-04 British Gas Corp Lubricated bearings
JPS6044593A (en) * 1983-08-23 1985-03-09 Idemitsu Kosan Co Ltd General-purpose grease composition
NZ213008A (en) * 1984-08-22 1989-04-26 Mobil Oil Corp Grease compositions containing diol/boron compound reaction products

Also Published As

Publication number Publication date
GB9410283D0 (en) 1994-07-13
GB2278612B (en) 1997-08-06
JPH06330070A (en) 1994-11-29
GB2278612A (en) 1994-12-07

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