JPH10102081A - Grease composition - Google Patents
Grease compositionInfo
- Publication number
- JPH10102081A JPH10102081A JP25888896A JP25888896A JPH10102081A JP H10102081 A JPH10102081 A JP H10102081A JP 25888896 A JP25888896 A JP 25888896A JP 25888896 A JP25888896 A JP 25888896A JP H10102081 A JPH10102081 A JP H10102081A
- Authority
- JP
- Japan
- Prior art keywords
- boron nitride
- grease
- grease composition
- hexagonal boron
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車用のホイー
ルベアリング、等速ジョイントグリース等に用いられる
自動車用グリース、或いは製鉄設備用のグリース等のい
ろいろな用途で用いられる高温・高速軸受用に適するグ
リース組成物に関し、とりわけ等速ジョイントに好適な
グリース組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for high-temperature and high-speed bearings used in various applications such as automotive grease used for wheel bearings and constant velocity joint greases for automobiles, and grease for steelmaking facilities. The present invention relates to a grease composition, and particularly to a grease composition suitable for a constant velocity joint.
【０００２】[0002]
【従来の技術】グリースは、自動車等の輸送機械、製鉄
用機械、或いは建設機械を始めとするいろいろな機械の
摺動部分の潤滑剤として用いられているが、これら機械
の一層の高性能化、高効率化に伴い、更に特性の優れる
ものが要求されている。2. Description of the Related Art Grease is used as a lubricant for sliding parts of various machines including transportation machines such as automobiles, iron making machines, and construction machines. As the efficiency increases, there is a demand for one having even better characteristics.
【０００３】特に、最近の自動車の高性能化の要求はめ
ざましく、例えば、ＦＦ車に使用される等速ジョイント
用グリースについては、精製鉱油にリチウム石鹸あるい
はウレア系化合物を増ちょう剤として加えたベースグリ
ースに、二硫化モリブデンと硫黄−リン系化合物、鉛系
化合物等を添加したものが用いられている。また、上記
ベースグリースに窒化硼素粉体を含有させて、特にフレ
ーキング性に優れた等速ジョイント用グリースが開発さ
れている（特開平４−２７９６９８号公報参照）。In particular, recent demands for higher performance of automobiles are remarkable. For example, for grease for constant velocity joints used for FF vehicles, base grease obtained by adding lithium soap or a urea compound as a thickener to refined mineral oil. Grease to which molybdenum disulfide and a sulfur-phosphorus compound, a lead compound or the like are added is used. In addition, a grease for a constant velocity joint having particularly excellent flaking properties has been developed by adding boron nitride powder to the base grease (see Japanese Patent Application Laid-Open No. 4-279798).
【０００４】[0004]
【発明が解決しようとする課題】しかし、それらのグリ
ース性能は充分でなく、特に摩擦係数の安定性が良好で
あり、安定な運転が可能なグリースが切望されている。
即ち、本発明者らが上記事情に鑑みていろいろ検討した
結果、窒化硼素粉のグリース組成物中での凝集状態を特
定するときに低い摩擦係数を有し、しかも長期間にわた
り優れた安定性を示すという格別の効果を奏することを
実験的に見いだし、本発明に至ったものであり、本発明
の目的は、摩擦係数の安定性に優れ、例えば等速ジョイ
ント、或いは高温・高速軸受に用いて良好で、機械・装
置の長期間の安定な運転が可能なグリース組成物を提供
することにある。However, their grease performance is not sufficient, and there is a strong demand for greases that have good friction coefficient stability and can be operated stably.
That is, as a result of various studies by the present inventors in view of the above circumstances, when specifying the state of aggregation of the boron nitride powder in the grease composition, it has a low friction coefficient, and has excellent stability over a long period of time. It has been found experimentally that it has a special effect of showing, which has led to the present invention, and the object of the present invention is to have excellent stability of the coefficient of friction, for example, using a constant velocity joint or a high-temperature / high-speed bearing. An object of the present invention is to provide a grease composition which is favorable and enables stable long-term operation of machines and devices.
【０００５】[0005]
【課題を解決する為の手段】本発明は、基油に、増ちょ
う剤及び六方晶窒化硼素粉を含有し、前記六方晶窒化硼
素の平均粒子径が１μｍ以上３０μｍ以下であり、しか
も二次粒子の最大径が３０μｍ以下であることを特徴と
するグリース組成物である。The present invention provides a base oil containing a thickener and a hexagonal boron nitride powder, wherein the hexagonal boron nitride has an average particle diameter of 1 μm or more and 30 μm or less, A grease composition characterized in that particles have a maximum diameter of 30 μm or less.
【０００６】また、本発明は、増ちょう剤がリチウム石
鹸であることを特徴とする前記のグリース組成物であ
り、前記六方晶窒化硼素粉の黒鉛化指数が４以下である
ことを特徴とする前記のグリース組成物であり、またこ
れらを用いた等速ジョイント用グリース組成物である。Further, the present invention provides the grease composition wherein the thickener is lithium soap, wherein the hexagonal boron nitride powder has a graphitization index of 4 or less. The grease composition described above, and a grease composition for a constant velocity joint using the same.
【０００７】[0007]
【発明の実態の形態】以下、本発明を詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
【０００８】窒化硼素としては、立方晶、稜面体、六方
晶等のいろいろな結晶系に属するもの或いはＰＢＮ、ｔ
−ＢＮ等いろいろのものが公知であるが、本発明では、
六方晶窒化硼素である。これは、六方晶窒化硼素のみ
が、その結晶構造に由来して滑り性能を有するためであ
る。[0008] As boron nitride, those belonging to various crystal systems such as cubic, rhombohedral and hexagonal, or PBN, t
-BN and the like are known, but in the present invention,
Hexagonal boron nitride. This is because only hexagonal boron nitride has sliding performance due to its crystal structure.
【０００９】六方晶窒化硼素の粒子の大きさについて
は、マイクロトラックによる粒子径の評価方法が公知で
あり、本発明の平均粒子径も前記方法で測定したもので
ある。With respect to the size of the hexagonal boron nitride particles, a method for evaluating the particle size using a microtrack is known, and the average particle size of the present invention is also measured by the above method.
【００１０】ところで、小さな平均粒子径を有する窒化
硼素は、一般の微細粒子を含む粉体と同様に、その一部
の粒子が凝集して二次粒子を構成することが多い。本発
明において、前記平均粒子径の測定とともに、二次粒子
の大きさ、特に二次粒子の最大径を測定することが重要
である。二次粒子の最大径は、光学顕微鏡を用いて容易
にすることができる。即ち、窒化硼素を含有するグリー
スの少量を２枚のスライドガラスに挟み、光を透過させ
ながら光学顕微鏡で２００〜４００倍の倍率で観察する
と、微細な粒子が凝集している二次粒子は粒子内が暗色
となる。このとき粒子内部が明色のものは二次粒子でな
く、粒子同士の凝集のない一次粒子である。視野中の前
記二次粒子について、その長径と短径（長径と直角方向
の径）を測定し、短径の最大値をもって二次粒子の最大
径とする。By the way, boron nitride having a small average particle diameter often forms secondary particles by aggregating some of the particles, similarly to powder containing general fine particles. In the present invention, it is important to measure the size of the secondary particles, particularly the maximum diameter of the secondary particles, together with the measurement of the average particle size. The maximum diameter of the secondary particles can be facilitated using an optical microscope. That is, when a small amount of grease containing boron nitride is sandwiched between two slide glasses and observed with an optical microscope at a magnification of 200 to 400 times while transmitting light, secondary particles in which fine particles are aggregated are particles. Inside is dark. At this time, those having a bright color inside of the particles are not secondary particles, but are primary particles without aggregation of the particles. The major axis and minor axis (diameter in the direction perpendicular to the major axis) of the secondary particles in the visual field are measured, and the maximum value of the minor axis is defined as the maximum diameter of the secondary particles.
【００１１】本発明者らは実験的に検討し、前記六方晶
窒化硼素について、グリース組成中で窒化硼素粒子相互
の凝集が生じないことが安定したグリース特性を発揮す
るために特に重要であるという知見を得て、本発明に至
ったものである。The present inventors have studied experimentally, and have found that it is particularly important for the hexagonal boron nitride that the boron nitride particles do not agglomerate in the grease composition in order to exhibit stable grease characteristics. Based on the findings, the present invention has been accomplished.
【００１２】即ち、六方晶窒化硼素はグリース組成物に
含まれて実際にグリースとして用いられる際に、上記し
たとおりの窒化硼素固有の滑り性能を発揮する為には、
その粒子は大きいほうが良いが、一方で二つの摺動面の
間に容易に入り込むようにはその粒子は小さい方が良
い。更に、窒化硼素の一次粒子は一般に偏平な形状であ
るが、一部は凝集して二次粒子を形成する場合がある。
この二次粒子は、一次粒子と比較して偏平ではないこと
から、摺動面の間には進入しにくいので、結果的にグリ
ースの摩擦特性が劣化する。また、二次粒子を構成する
一次粒子間の隙間に充分にベースグリースが浸透しづら
く、空気が二次粒子内部に残り易いという問題がある。
空気の残留があると、窒化硼素周囲のベースグリースの
量が不足するので、結果的に充分な量のグリースが摺動
面に供給されず、摩擦係数が変動する現象を生じる。That is, when hexagonal boron nitride is contained in a grease composition and actually used as a grease, in order to exhibit the above-described sliding performance inherent to boron nitride,
The larger the particle, the better the particle is, on the other hand, so that it can easily enter between the two sliding surfaces. Further, the primary particles of boron nitride generally have a flat shape, but some of them may aggregate to form secondary particles.
Since the secondary particles are not flat compared to the primary particles, they do not easily enter between the sliding surfaces, and as a result, the friction characteristics of the grease deteriorate. In addition, there is a problem that the base grease does not sufficiently penetrate into the gaps between the primary particles constituting the secondary particles, and air tends to remain inside the secondary particles.
If air remains, the amount of the base grease around the boron nitride becomes insufficient. As a result, a sufficient amount of grease is not supplied to the sliding surface, and a phenomenon occurs in which the friction coefficient fluctuates.
【００１３】以上説明の通り、グリース組成物中の六方
晶窒化硼素の粒子については、その粉体集合体としての
粒子径並びに二次粒子径について適切な大きさが存在
し、本発明者らの実験的検討の結果によれば、粒子径の
大きさについては平均径で１μｍ以上３０μｍ以下であ
り、二次粒子については最大で３０μｍ以下、好ましく
は２０μｍ以下である。粒子径の平均径が１μｍ未満の
場合や３０μｍを超える場合には、粒子が小さくて窒化
硼素固有の滑り特性が十分には発揮されなかったり、摺
動面の間に窒化硼素粒子が供給されない等の理由で、グ
リースの摩擦係数が十分に低下しない或いは安定して、
長期間に渡って低い摩擦係数を維持できないという問題
が発生することがある。二次粒子の最大径については、
これが小さいほど摩擦係数の変動は抑えられ、二次粒子
の最大径が３０μｍ以下、好ましくは２０μｍ以下、で
あれば一層に摩擦抵抗の安定性が増し、長期の渡って安
定な摺動特性を達成できるので良好である。尚、二次粒
子の最大径の下限値については、本発明の主旨からこれ
を特定する必要がないことは明らかである。As described above, with respect to the particles of hexagonal boron nitride in the grease composition, there are appropriate sizes for the particle size and the secondary particle size as a powder aggregate, and According to the results of the experimental study, the average particle size is 1 μm or more and 30 μm or less, and the maximum size of the secondary particles is 30 μm or less, preferably 20 μm or less. When the average particle diameter is less than 1 μm or more than 30 μm, the particles are too small to exhibit sufficient boron nitride-specific sliding properties, or boron nitride particles are not supplied between sliding surfaces. For the reason, the coefficient of friction of the grease does not decrease sufficiently or stably,
A problem may occur that a low coefficient of friction cannot be maintained over a long period of time. Regarding the maximum diameter of secondary particles,
The smaller this is, the more the fluctuation of the friction coefficient is suppressed, and if the maximum diameter of the secondary particles is 30 μm or less, preferably 20 μm or less, the stability of frictional resistance is further increased, and stable sliding characteristics are achieved over a long period of time. Good because it can. It is apparent that the lower limit of the maximum diameter of the secondary particles does not need to be specified from the gist of the present invention.
【００１４】六方晶の窒化硼素は、滑り形成能の面か
ら、結晶が発達したものが望ましい。六方晶の窒化硼素
の結晶の発達程度を知る指数として、化１式で表される
黒鉛化指数が公知である。It is desirable that the hexagonal boron nitride has developed crystals in terms of slip forming ability. As an index for knowing the degree of development of the hexagonal boron nitride crystal, a graphitization index represented by Formula 1 is known.
【００１５】[0015]
【化１】 黒鉛化指数＝（Ｉa＋Ｉｂ）／Iｃ ここで、Ｉaは（１００）、Ｉｂは（１０１）、Iｃは
（１０２）のＸ線回折におけるピーク面積を示し、黒鉛
化指数が小さいほど結晶性は良好である。Embedded image Graphitization index = (Ia + Ib) / Ic where Ia is the peak area in X-ray diffraction of (100), Ib is (101), and Ic is (102). The smaller the graphitization index, the better the crystallinity. is there.
【００１６】本発明においては、黒鉛化指数が４以下の
窒化硼素に限定するとき、摩擦係数の安定性が良好で、
一層好ましいグリース特性を有するグリース組成物が得
られる。In the present invention, when the graphitization index is limited to boron nitride of 4 or less, the stability of the coefficient of friction is good,
A grease composition having more favorable grease properties is obtained.
【００１７】また、窒化硼素素の含有量は、グリース組
成物全量中に０．５〜２０重量％、好ましくは１〜１０
重量％の範囲である。０．５重量％未満では窒化硼素の
充分な量が摺動面に供給されず、２０重量％を越えると
グリース組成物の粘度が高くなり過ぎて充分な潤滑性能
を発揮することができない。用途に応じて要求される摺
動特性は異なるので、前記範囲内で用途毎に選択する
が、特に１〜１０重量％の範囲では広範囲の用途に用い
て、低い摩擦係数が安定して達成され好適である。The content of boron nitride is 0.5 to 20% by weight, preferably 1 to 10% by weight, based on the total amount of the grease composition.
% By weight. If the amount is less than 0.5% by weight, a sufficient amount of boron nitride is not supplied to the sliding surface, and if the amount exceeds 20% by weight, the viscosity of the grease composition becomes too high to exhibit sufficient lubricating performance. Since the required sliding characteristics are different depending on the application, it is selected for each application within the above range. In particular, in the range of 1 to 10% by weight, it is used for a wide range of applications, and a low friction coefficient is stably achieved. It is suitable.
【００１８】本発明に用いる基油としては、石油系潤滑
油や合成油の各種潤滑油を用いることができる。前記石
油系潤滑油としては、例えば、原油を常圧や減圧で蒸留
して得られる潤滑油留分を、いろいろな精製処理を組み
合せて得られるパラフィン系、ナフテン系等の潤滑油が
好ましい。また合成油としては、ポリブテン等のα−オ
レフィン、アルキルベンゼン、アルキルナフタレン、ジ
トリデシルグルタレート等のジエステル、ポリオールエ
ステル、ポリオキシアルキレングリコール、ポリフェニ
ルエーテル、シリコーン油、パーフルオロアルキルエー
テル等が挙げらる。前記基油は使用に際して単独若しく
は混合物として用いることができる。As the base oil used in the present invention, various lubricating oils such as petroleum-based lubricating oils and synthetic oils can be used. As the petroleum-based lubricating oil, for example, a lubricating oil such as a paraffinic or naphthenic oil obtained by combining various refining treatments with a lubricating oil fraction obtained by distilling crude oil at normal pressure or reduced pressure is preferable. Examples of the synthetic oil include α-olefins such as polybutene, diesters such as alkylbenzene, alkylnaphthalene, and ditridecylglutarate, polyol esters, polyoxyalkylene glycol, polyphenylether, silicone oil, and perfluoroalkylether. . The base oil can be used alone or as a mixture when used.
【００１９】本発明に用いる増ちょう剤としては、ウレ
ア基を有する化合物（いわゆるウレア系増ちょう剤）や
金属石鹸等が用いることができ、その添加量は基油と増
ちょう剤からなるべースグリース全量中の２〜２５重量
％が一般的である。前記ウレア系増ちょう剤としては、
例えば４，４’ビス（３オクチルウレイド）ジフェニル
メタン等の脂肪族ジウレア、その他に脂環族ジウレア、
芳香族ジウレア、トリウレア、テトラウレア等いろいろ
知られているが、いずれも用いることができる。また、
前記金属石鹸としては、例えばナトリウム石鹸、カルシ
ウム石鹸、アルニウム石鹸、及び例えばリチウム−１２
ヒドロキシステアレート等のリチウム石鹸等を用いるこ
とができる。更に、これらのウレア系増ちょう剤、金属
石鹸はそれぞれ単独で或いはウレア系増ちょう剤同士、
金属石鹸同士を混合して用いることができる。また、前
記ウレア基を有する化合物は、ジイソシアネートと第１
級アミンや第２級アミンの化合物とを混合し、基油中で
１０〜２００℃で反応させることで得ることもできる。As the thickener used in the present invention, a compound having a urea group (so-called urea thickener), metal soap, or the like can be used, and the amount of addition is a base grease comprising a base oil and a thickener. 2 to 25% by weight of the total amount is common. As the urea thickener,
For example, aliphatic diurea such as 4,4'bis (3-octylureido) diphenylmethane, and other alicyclic diurea;
Various types are known, such as aromatic diurea, triurea, and tetraurea, and any of them can be used. Also,
Examples of the metal soap include sodium soap, calcium soap, alnium soap, and lithium-12, for example.
Lithium soap such as hydroxystearate can be used. Further, these urea thickeners, metal soaps may be used alone or with each other,
A mixture of metal soaps can be used. Further, the compound having a urea group may be a diisocyanate and a first isocyanate.
It can also be obtained by mixing a compound of a secondary amine or a secondary amine and reacting it at 10 to 200 ° C. in a base oil.
【００２０】また、前記増ちょう剤に関して、本発明者
らの検討によれば、摩擦係数の安定性は、窒化硼素と増
ちょう剤との組み合わせにも影響を受け、窒化硼素を含
有する本発明のグリース組成物においては、リチウム石
鹸を用いるが一層摩擦係数が低く、安定するので良好で
ある。According to the present inventors' studies on the thickener, the stability of the friction coefficient is also affected by the combination of boron nitride and the thickener. In the grease composition of (1), lithium soap is used, but the friction coefficient is lower and the stability is more favorable.
【００２１】本発明においては、基油、増ちょう剤、六
方晶窒化硼素以外の成分を、グリース特性が劣化しない
範囲で添加することができる。前記成分の例として、黒
鉛、フッ化黒鉛、二硫化モリブデン、ポリテトラフロロ
エチレン、硫化アンチモン、アルカリ金属やアルカリ土
類金属のほう酸塩等の固体潤滑剤や、いおう系化合物や
リン系化合物で代表されるいろいろな極圧剤、フェノー
ル系化合物やアミン系化合物で代表されるいろいろな酸
化防止剤、更にはラウリルアミン等の油性剤、ポリメタ
クリレート等の粘度指数向上剤、さび止め防止剤等があ
げられる。In the present invention, components other than the base oil, the thickener, and the hexagonal boron nitride can be added as long as the grease characteristics are not deteriorated. Examples of the components include graphite, fluorinated graphite, molybdenum disulfide, polytetrafluoroethylene, antimony sulfide, solid lubricants such as borates of alkali metals and alkaline earth metals, and sulfur compounds and phosphorus compounds. Various extreme pressure agents, various antioxidants represented by phenolic compounds and amine compounds, oily agents such as laurylamine, viscosity index improvers such as polymethacrylate, and rust inhibitors. Can be
【００２２】以下実施例に基づき、本発明をさらに詳細
に説明する。Hereinafter, the present invention will be described in more detail with reference to Examples.
【００２３】[0023]
〔実施例１〜５〕パラフィン系鉱油を基油とし、これに
増ちょう剤として脂肪族ジウレア系化合物（４，４’ビ
ス（３オクチルウレイド）ジフェニルメタン）またはリ
チウム石鹸（リチウム−１２ヒドロキシステアレート）
を全量中に１８重量％となるように添加したベースグリ
ースを用いて、一次粒子の平均径、二次粒子の最大径及
び黒鉛化指数が異なるいろいろな六方晶窒化硼素をグリ
ース組成物中に３重量％となるように配合し、３段ロー
ルミルにて混合していろいろなグリース組成物を作製し
た。[Examples 1 to 5] A paraffinic mineral oil was used as a base oil, and an aliphatic diurea-based compound (4,4'bis (3-octylureido) diphenylmethane) or lithium soap (lithium-12 hydroxystearate) was used as a thickener.
Is added to the grease composition in an amount of 18% by weight in the total amount, and various hexagonal boron nitrides having different average diameters of primary particles, maximum diameters of secondary particles, and graphitization indexes are added to the grease composition. % By weight and mixed with a three-stage roll mill to produce various grease compositions.
【００２４】前記のグリース組成物について、シェル式
四球試験機（神鋼造機株式会社製「高速四球形摩擦試験
機」）を用い、ＡＳＴＭＤ４１７２に基づいて、 試験荷重 ： ４０ｋｇｆ 回転速度 ：１２００ｒｐｍ グリース温度： ７５℃ 試験時間 ： ６０ｍｉｎ の条件で摺動試験を行なった。The above grease composition was tested using a shell-type four-ball testing machine ("High-Speed Four-Sphere Friction Testing Machine" manufactured by Shinko Zoki Co., Ltd.) based on ASTM D4172. C. Test time: A sliding test was performed under the conditions of 60 min.
【００２５】摩擦係数の安定性を調べる為に、モニター
される摩擦係数について、試験開始後１５ｍｉｎから６
０ｍｉｎまでの間の摩擦係数を次の式により、その変動
率を算出した。 変動率＝（最大値−最小値）／平均値×１００（％） ここで、摩擦係数の最大値、最小値はいずれも前記期間
中に示した摩擦係数の最大値と最小値を示し、平均値は
前記期間中での摩擦係数の最頻値である。この結果を表
１に示すIn order to examine the stability of the friction coefficient, the monitored friction coefficient was changed from 15 minutes after the start of the test to 6 minutes.
The rate of change of the friction coefficient up to 0 min was calculated by the following equation. Fluctuation rate = (maximum value−minimum value) / average value × 100 (%) Here, the maximum value and the minimum value of the friction coefficient indicate the maximum value and the minimum value of the friction coefficient shown during the period, respectively. The value is the mode of the coefficient of friction during the period. The results are shown in Table 1.
【００２６】[0026]
【表１】[Table 1]
【００２７】〔比較例〕比較例として、二次粒子の最大
径が大きな窒化硼素を用いたこと以外は実施例１〜５と
同一の操作でグリース組成物を作製し、また同一の評価
試験を行なった。この結果を表１に併せて記載した。Comparative Example As a comparative example, a grease composition was prepared in the same manner as in Examples 1 to 5 except that boron nitride having a large maximum diameter of secondary particles was used, and the same evaluation test was performed. Done. The results are shown in Table 1.
【００２８】[0028]
【発明の効果】本発明のグリース組成物は、摩擦係数の
安定性が優れるので、自動車ホイールベアリング、等速
ジョイント等に用いる自動車用グリース、或いは製鉄設
備用のグリース等、いろいろな用途で用いられる高温・
高速軸受用グリース等に適し、これらの安定な運転に役
立ち、産業上有用である。The grease composition of the present invention has excellent friction coefficient stability and can be used in various applications such as grease for automobiles used for automobile wheel bearings, constant velocity joints, etc., or grease for steelmaking facilities. high temperature·
Suitable for grease for high-speed bearings, etc., is useful for these stable operations, and is industrially useful.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ１０Ｎ 10:02 20:06 30:06 30:08 40:02 40:04 50:10 (72)発明者 和田 徹也 福岡県大牟田市新開町１番地 電気化学工 業株式会社大牟田工場内──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C10N 10:02 20:06 30:06 30:08 40:02 40:04 50:10 (72) Inventor Tetsuya Wada Omuta, Fukuoka Prefecture No. 1 Shinkaicho, Okayama, Japan
Claims (4)
含有し、前記六方晶窒化硼素の平均粒子径が１μｍ以上
３０μｍ以下であり、しかも二次粒子の最大径が３０μ
ｍ以下であることを特徴とするグリース組成物。1. A composition comprising a base oil, a thickener and hexagonal boron nitride, wherein the average particle size of the hexagonal boron nitride is 1 μm or more and 30 μm or less, and the maximum size of secondary particles is 30 μm.
m or less.
特徴とする請求項１記載のグリース組成物。2. The grease composition according to claim 1, wherein the thickener is lithium soap.
あることを特徴とする請求項２記載のグリース化合物。3. The grease compound according to claim 2, wherein the graphitization index of hexagonal boron nitride is 4 or less.
等速ジョイント用グリース組成物。4. The grease composition for a constant velocity joint according to claim 1, 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25888896A JP3238634B2 (en) | 1996-09-30 | 1996-09-30 | Grease composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25888896A JP3238634B2 (en) | 1996-09-30 | 1996-09-30 | Grease composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10102081A true JPH10102081A (en) | 1998-04-21 |
| JP3238634B2 JP3238634B2 (en) | 2001-12-17 |
Family
ID=17326430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25888896A Expired - Fee Related JP3238634B2 (en) | 1996-09-30 | 1996-09-30 | Grease composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3238634B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006298963A (en) * | 2005-04-15 | 2006-11-02 | Ntn Corp | Grease for constant velocity joint and constant velocity joint |
| KR100679242B1 (en) | 2005-04-22 | 2007-02-05 | 한국마그네슘기술연구조합 | A Lubricant and A making method for extruding magnesium alloy |
| JP2014526578A (en) * | 2011-09-15 | 2014-10-06 | クリューバー リュブリケーション ミュンヘン ソシエタス ヨーロピア ウント コンパニー コマンディートゲゼルシャフト | Heat resistant grease |
| JP2016212218A (en) * | 2015-05-07 | 2016-12-15 | キヤノン株式会社 | Electrophotographic photoreceptor, process cartridge, and electrophotographic device |
| CN108822939A (en) * | 2018-07-19 | 2018-11-16 | 广州联博科技发展有限公司 | A kind of white and prepares method at lithium base grease |
| CN115477974A (en) * | 2022-08-12 | 2022-12-16 | 广州诺拜因化工有限公司 | BN additive-containing extreme high temperature resistant composite lithium-based grease |
-
1996
- 1996-09-30 JP JP25888896A patent/JP3238634B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006298963A (en) * | 2005-04-15 | 2006-11-02 | Ntn Corp | Grease for constant velocity joint and constant velocity joint |
| KR100679242B1 (en) | 2005-04-22 | 2007-02-05 | 한국마그네슘기술연구조합 | A Lubricant and A making method for extruding magnesium alloy |
| JP2014526578A (en) * | 2011-09-15 | 2014-10-06 | クリューバー リュブリケーション ミュンヘン ソシエタス ヨーロピア ウント コンパニー コマンディートゲゼルシャフト | Heat resistant grease |
| JP2016212218A (en) * | 2015-05-07 | 2016-12-15 | キヤノン株式会社 | Electrophotographic photoreceptor, process cartridge, and electrophotographic device |
| CN108822939A (en) * | 2018-07-19 | 2018-11-16 | 广州联博科技发展有限公司 | A kind of white and prepares method at lithium base grease |
| CN115477974A (en) * | 2022-08-12 | 2022-12-16 | 广州诺拜因化工有限公司 | BN additive-containing extreme high temperature resistant composite lithium-based grease |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3238634B2 (en) | 2001-12-17 |
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