JP2000104091A - Grease for sliding contact - Google Patents
Grease for sliding contactInfo
- Publication number
- JP2000104091A JP2000104091A JP28866898A JP28866898A JP2000104091A JP 2000104091 A JP2000104091 A JP 2000104091A JP 28866898 A JP28866898 A JP 28866898A JP 28866898 A JP28866898 A JP 28866898A JP 2000104091 A JP2000104091 A JP 2000104091A
- Authority
- JP
- Japan
- Prior art keywords
- grease
- contact
- sliding
- sliding contact
- present
- 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
Landscapes
- Lubricants (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、摺動式電気接点に
使用される接点用グリ−スに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grease for a contact used for a sliding electric contact.
【０００２】[0002]
【従来の技術】自動車、産業機械、家電製品等及びそれ
らを構成する各部品は、近年ますます小型化、高速化
し、その内部や周辺に設置される摺動式電気接点（以
下、単に摺動接点という）の雰囲気温度は従来よりも更
に上昇する傾向にある。通常、摺動接点には接点部品の
摩耗、腐食等の防止のためグリ−スが塗布されている。
この摺動接点用グリ−スは電気的には絶縁物質であり、
接点部が開いた状態の時は通電させず、接点部が閉じた
状態の時には絶縁物質であるこのグリ−スが接点部品間
に介在していても通電の障害とならないことが要求され
ている。2. Description of the Related Art In recent years, automobiles, industrial machines, home electric appliances, etc. and their constituent parts have been increasingly miniaturized and operated at high speed, and sliding electric contacts (hereinafter simply referred to as "sliding electric contacts") installed inside and around the same. The ambient temperature of the contact point) tends to be higher than before. Normally, grease is applied to the sliding contacts to prevent wear and corrosion of the contact components.
This grease for a sliding contact is an electrically insulating substance,
It is required that when the contact portion is open, the current is not supplied, and when the contact portion is closed, the grease, which is an insulating material, does not obstruct the current supply even if interposed between the contact parts. .
【０００３】一般に、摺動接点用グリ−スとしては、α
−オレフィン（ＰＡＯ）油を基油とし、リチウム石けん
を増ちょう剤としたグリ−ス（ＰＡＯ／Ｌｉ石けんグリ
−ス）が広く用いられており、雰囲気温度およそ１００
℃以下の環境下では長時間安定して使用できる。しかし
ながら、このＰＡＯ／Ｌｉ石けんグリ−スは、雰囲気温
度が１００℃を超える高温環境下では基油及び増ちょう
剤が極めて短期間のうちに劣化し、グリ−スは黒色に変
色し、さらには軟化、流出または著しく硬化してしま
い、所望の性能を得ることができない。このように、雰
囲気温度が１００℃を超える高温環境下ではＰＡＯ／Ｌ
ｉ石けんグリ−スは摺動接点用グリ−スとしては使用で
きない。[0003] Generally, grease for sliding contacts is α
Grease (PAO / Li soap grease) using olefin (PAO) oil as a base oil and lithium soap as a thickener is widely used, and the ambient temperature is about 100
It can be used stably for a long time under the environment below ° C. However, in the PAO / Li soap grease, the base oil and the thickener deteriorate in a very short period of time in a high temperature environment in which the ambient temperature exceeds 100 ° C., and the grease turns black, and It softens, flows out or hardens significantly, and the desired performance cannot be obtained. Thus, under the high temperature environment where the ambient temperature exceeds 100 ° C., PAO / L
i Soap grease cannot be used as grease for sliding contacts.
【０００４】一方、高温環境下において極めて良好な安
定性を示すグリ−スとして、パ−フルオロポリエ−テル
（ＰＦＰＥ）油を基油とし、ポリテトラフルオロエチレ
ン（ＰＴＦＥ）粒子を増ちょう剤とした、いわゆるフッ
素グリ−スが知られている。一般に、フッ素グリ−ス
は、ちょう度グレ−ドＮｏ．００〜２の通常使用される
グリ−スの硬さを得るためには、ＰＡＯ／Ｌｉ石けんグ
リ−ス中の増ちょう剤であるリチウム石けんに比較して
非常に多くの量のＰＴＦＥ粒子を添加しなければなら
ず、また、その粒径もリチウム石けん粒子に比較して大
きい。このＰＴＦＥ粒子は不導体であり、このようなフ
ッ素グリ−スを摺動接点に塗布すると、ＰＴＦＥ粒子が
接点部品間の接触を妨害し、通電の障害となる。以上の
ように、フッ素グリ−スは高温環境下において極めて良
好な安定性を示すが、摺動接点用グリ−スとしては好ま
しくない。On the other hand, as a grease exhibiting extremely good stability in a high temperature environment, perfluoropolyether (PFPE) oil is used as a base oil, and polytetrafluoroethylene (PTFE) particles are used as a thickener. So-called fluorine grease is known. In general, fluorine grease is a consistency grade No. In order to obtain a hardness of 00 to 2 commonly used grease, a very large amount of PTFE particles is added compared to lithium soap which is a thickener in PAO / Li soap grease. And its particle size is larger than that of lithium soap particles. The PTFE particles are non-conductive, and if such fluorine grease is applied to the sliding contact, the PTFE particles hinder the contact between the contact parts, and hinder the conduction. As described above, fluorine grease exhibits extremely good stability in a high-temperature environment, but is not preferred as grease for sliding contacts.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記の種々
の問題点を解決するために為されたものであり、その目
的とするところは、雰囲気温度１００℃を超える高温環
境下において長期間使用可能な摺動接点用グリ−スを提
供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned various problems, and an object of the present invention is to provide a high-temperature environment in which the ambient temperature exceeds 100 ° C. for a long time. An object of the present invention is to provide a grease for a sliding contact that can be used.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明における摺動接点用グリ−スは、４０℃で１
５〜５１０ｍｍ2 ／s の動粘度を有するパ−フルオロポ
リエ−テル油の群から選択される１種または２種以上の
混合物９０．０〜９９．５質量％と、ＢＥＴ法による比
表面積が８０ｍ2 ／ｇ以上のシリカ及び酸化アルミニウ
ムの群から選択される１種または２種以上の混合物０．
５〜１０質量％からなることを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, the grease for a sliding contact according to the present invention is one grease at 40.degree.
90.0 to 99.5% by mass of one or more mixtures selected from the group of perfluoropolyether oils having a kinematic viscosity of 5 to 510 mm 2 / s, and a specific surface area by a BET method of 80 m 2 / g or more of one or more mixtures selected from the group consisting of silica and aluminum oxide.
It is characterized by comprising 5 to 10% by mass.
【０００７】[0007]
【発明の実施の形態】以下、本発明をより詳細に説明す
る。 （１）摺動接点用グリースの構成成分及びその配合割合 本発明の摺動接点用グリースは、特定の基油と増ちょう
剤とからなる基グリースに必要に応じ添加剤を配合して
なるものである、以下、各成分について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. (1) Components of Grease for Sliding Contacts and Their Mixing Ratio The grease for sliding contacts of the present invention is obtained by blending additives as necessary with a base grease comprising a specific base oil and a thickener. Hereinafter, each component will be described.
【０００８】（ａ）基油 本発明に用いられる基油は、４０℃で１５〜５１０ｍｍ
2 ／ｓの動粘度を有し、且つ、下記一般式(1) 、(2) ま
たは(3) で示される化合物からなる群から選択されたパ
−フルオロポリエ−テル油である。また、前記パ−フル
オロポリエ−テル油を２種以上混合して使用してもよ
い。パ−フルオロポリエ−テル油の動粘度が、１５ｍｍ
2 ／ｓ未満の場合は蒸発減量が大きく、５１０ｍｍ2 ／
ｓを超える場合は流動点が高く、低温性能が良くないた
め、本発明の摺動接点用グリースには適さない。 一般式(1) ＣＦ3 −［( Ｏ−ＣＦ2 −ＣＦ2)m −（０−
ＣＦ2)n ］−Ｏ−ＣＦ3 一般式(2) ＣＦ3 −［( Ｏ−ＣＦＣＦ3 −ＣＦ2)p −
（０−ＣＦ2)q ］−Ｏ−ＣＦ3 一般式(3) Ｆ−( ＣＦＣＦ3 −ＣＦ2 −Ｏ)r−ＣＦ2 −
ＣＦ3 (A) Base oil The base oil used in the present invention is 15 to 510 mm at 40 ° C.
A perfluoropolyether oil having a kinematic viscosity of 2 / s and selected from the group consisting of compounds represented by the following general formulas (1), (2) and (3). Further, two or more kinds of the above-mentioned perfluoropolyether oils may be mixed and used. The kinematic viscosity of the perfluoropolyether oil is 15 mm
When it is less than 2 / s, the evaporation loss is large and 510 mm 2 /
If it exceeds s, the pour point is high and the low-temperature performance is not good, so that it is not suitable for the sliding contact grease of the present invention. Formula (1) CF 3 - [( O-CF 2 -CF 2) m - (0-
CF 2 ) n ] -O-CF 3 General formula (2) CF 3 -[(O-CFCF 3 -CF 2 ) p-
(0-CF 2) q] -O-CF 3 Formula (3) F- (CFCF 3 -CF 2 -O) r -CF 2 -
CF 3
【０００９】（ｂ）増ちょう剤 本発明に用いられる増ちょう剤は、ＢＥＴ法による比表
面積が８０ｍ2 ／ｇ以上のシリカ及び酸化アルミニウム
の群から選択される１種または２種以上の混合物であ
る。ＢＥＴ法による比表面積が８０ｍ2 ／ｇ未満のシリ
カまたは酸化アルミニウムを使用した場合は、前記フッ
素グリ−スのＰＴＦＥ粒子の場合と同様に、グリ−ス中
に比較的大きな粒子を多量に含むことになり、その粒子
が接点部品間の接触を妨害し、通電の障害となり、本発
明の摺動接点用グリースには適さない。(B) Thickener The thickener used in the present invention is one or a mixture of two or more selected from the group consisting of silica and aluminum oxide having a specific surface area of at least 80 m 2 / g by the BET method. . When silica or aluminum oxide having a specific surface area of less than 80 m @ 2 / g according to the BET method is used, the grease contains a large amount of relatively large particles in the grease as in the case of the PTFE particles of the fluorine grease. The particles hinder the contact between the contact parts, causing an obstacle to energization, and are not suitable for the sliding contact grease of the present invention.
【００１０】本発明に用いられる上記シリカ、酸化アル
ミニウムは、それぞれ単独でも使用することができる
が、シリカ５〜９５質量％、酸化アルミニウム９５〜５
質量％の配合比、好ましくは、シリカ１０〜９０質量
％、酸化アルミニウム９０〜１０質量％の配合比で混合
して使用すると、例えば、湿度９５％ＲＨのような湿潤
環境下での通電の安定性が更に良好となる。The above-mentioned silica and aluminum oxide used in the present invention can be used alone, but silica 5 to 95% by mass, aluminum oxide 95 to 5
When mixed and used in a compounding ratio of 10% to 90% by mass of silica, preferably 90 to 10% by mass of aluminum oxide, for example, the stability of energization in a humid environment such as a humidity of 95% RH can be obtained. The properties are further improved.
【００１１】本発明の摺動接点用グリ−スは、上記シリ
カ、及び酸化アルミニウムの群から選択される１種また
は２種以上の混合物を０．５〜１０質量％含有すること
を特徴とする。この含有量が０．５質量％未満である場
合はグリ−スが流動状となり接点部に保持できず、ま
た、この含有量が１０質量％を超えるとグリ−スが硬く
なり過ぎるため、本発明の摺動接点用グリースには適さ
ない。The grease for a sliding contact of the present invention is characterized in that it contains 0.5 to 10% by mass of one or a mixture of two or more members selected from the group consisting of silica and aluminum oxide. . If the content is less than 0.5% by mass, the grease becomes fluid and cannot be held at the contact portion. If the content exceeds 10% by mass, the grease becomes too hard. It is not suitable for the grease for sliding contacts of the invention.
【００１２】本発明の摺動接点用グリ−スは、たとえ
ば、次のような方法により製造することができる。即
ち、各原料を適当な大きさの容器に秤り取り、良く攪拌
した後、３段ロ−ルミルを２回通過させることにより、
本発明の摺動接点用グリ−スを得ることができる。ま
た、本発明の摺動接点用グリ−スには、その性能を損な
うことなしに酸化防止剤、金属不活性剤等の添加剤を添
加することができる。The grease for a sliding contact of the present invention can be manufactured, for example, by the following method. That is, each raw material is weighed into a container of an appropriate size, stirred well, and then passed twice through a three-stage roll mill, whereby
The grease for a sliding contact of the present invention can be obtained. Further, additives such as an antioxidant and a metal deactivator can be added to the grease for a sliding contact of the present invention without impairing its performance.
【００１３】[0013]
【実施例】以下、実施例により本発明の摺動接点用グリ
−スを更に詳細に説明する。表１、表２及び表３に本発
明の実施例及び比較例に用いたグリ−スの配合を示す。
実施例１〜実施例１２及び比較例１〜比較例５のグリ−
スは、各原料を秤り取り、良く混合した後、３段ロ−ル
ミルを２回通過させて製造したグリ−スである。比較例
１及び比較例２のグリ−スは従来のフッ素グリ−スに相
当するものであり、比較例６及び比較例７のグリ−スは
摺動接点用グリ−スとして市販されているＰＡＯ／Ｌｉ
石けんグリ−スである。The grease for a sliding contact of the present invention will be described in more detail with reference to the following examples. Tables 1, 2 and 3 show the blending of greases used in Examples and Comparative Examples of the present invention.
Grease of Examples 1 to 12 and Comparative Examples 1 to 5
Grease is a grease manufactured by weighing and mixing each raw material and passing the raw material twice through a three-stage roll mill. The greases of Comparative Examples 1 and 2 correspond to conventional fluorine greases, and the greases of Comparative Examples 6 and 7 are commercially available greases for sliding contacts. / Li
Soap grease.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】[0016]
【表３】 [Table 3]
【００１７】実施例及び比較例の各グリ−スを次の試験
方法で評価した。 （１）混和ちょう度 ＪＩＳ Ｋ−２２２０の「5.3 ちょう度測定法」に準
拠した。 （２）接点耐環境試験 １０×１２×１ｍｍの銀板に試験グリ−スを膜厚０．２
ｍｍで塗布し、試験前１５０℃の恒温槽に５００ｈｒ静
置後の平均接触抵抗及びグリ−スの変色度合いを測定
し、また、前記銀板に試験グリ−スを膜厚０．２ｍｍで
塗布し、湿度９５％ＲＨで８０℃の恒湿恒温槽に５００
ｈｒ静置後の平均接触抵抗及びグリ−スの変色を測定し
た。平均接触抵抗は、荷重９０ｇｆ〜１００ｇｆ〜９０
ｇｆまでの平均接触抵抗値を求めた。接触抵抗測定部分
の概略を図１に、測定結果の一例を図２及び図３に示
す。 〈接触抵抗測定条件〉銅製半球型リベットを試験片に接
触させ、接触抵抗を測定する。 荷重：０ｇｆ〜１００ｇｆ〜０ｇｆを２分間で連続的に
変化させる。 摺動：摺動幅１ｍｍを１ｍｍ／ｍｉｎの速度で１往復さ
せる。 負荷電圧、電流：１２Ｖ １０ｍＡEach grease of Examples and Comparative Examples was evaluated by the following test methods. (1) Incorporation consistency Based on JIS K-2220 “5.3 Consistency measurement method”. (2) Contact environment resistance test A test grease was applied to a silver plate of 10 × 12 × 1 mm with a film thickness of 0.2.
Before testing, measure the average contact resistance and the degree of grease discoloration after standing in a thermostat at 150 ° C. for 500 hours. 500% in a constant temperature and humidity chamber of 80 ° C at 95% RH
The average contact resistance and the discoloration of the grease after standing for hr were measured. The average contact resistance is 90 gf to 100 gf to 90 load.
The average contact resistance up to gf was determined. FIG. 1 shows an outline of the contact resistance measurement portion, and FIGS. 2 and 3 show an example of the measurement results. <Contact resistance measurement condition> A copper hemispherical rivet is brought into contact with a test piece, and the contact resistance is measured. Load: 0 gf to 100 gf to 0 gf are continuously changed in 2 minutes. Sliding: A sliding width of 1 mm is reciprocated once at a speed of 1 mm / min. Load voltage, current: 12V 10mA
【００１８】表１、表２及び表３に試験結果を示す如
く、接触抵抗値が低いほど接点部品間にグリ−スが介在
していても通電の障害とはなりにくく、摺動接点用グリ
−スとしては良好であることを示す。試験結果から、実
施例１〜実施例１２に示した本発明の摺動接点用グリ−
スは、１５０℃で５００ｈｒ加熱しても、酸化劣化等に
よる変色は少なく、低い接触抵抗値を示し、摺動接点用
グリ−スとして良好な性能を有している。また、実施例
５〜実施例１２のグリ−スのようにシリカ５〜９５質量
％、酸化アルミニウム９５〜５質量％の配合比で混合し
て用いることにより、シリカまたは酸化アルミニウム単
独で用いた実施例１〜実施例４のグリ−スよりも、湿度
９５％ＲＨの湿潤環境下において低い接触抵抗値が得ら
れ、通電安定性は更に良好であった。As shown in the test results in Tables 1, 2 and 3, as the contact resistance value is lower, even if grease is interposed between the contact parts, it is less likely to cause an obstacle to energization. -Indicates good. From the test results, the sliding contact grease of the present invention shown in Examples 1 to 12 was used.
The grease, even when heated at 150 ° C. for 500 hours, shows little discoloration due to oxidative deterioration and the like, shows a low contact resistance value, and has good performance as grease for sliding contacts. Further, by using a mixture of 5 to 95% by mass of silica and 95 to 5% by mass of aluminum oxide as in the greases of Examples 5 to 12, silica or aluminum oxide is used alone. Compared to the greases of Examples 1 to 4, a lower contact resistance value was obtained in a humid environment at a humidity of 95% RH, and the current-carrying stability was even better.
【００１９】比較例１、比較例２のグリ−スは従来のフ
ッ素グリ−スに相当するグリ−スであるため、１５０℃
で５００ｈｒ加熱しても変色は少なく、良好な熱安定性
を有するが、接触抵抗は試験前の時点から大きく、１５
０℃で５００ｈｒ加熱後も同様に大きい。このようなグ
リ−スは、摺動接点用グリ−スとしては使用できない。
比較例３〜比較例７のグリ−スは１５０℃で５００ｈｒ
加熱により、著しく変色、硬化し、接触抵抗が大きくな
り、雰囲気温度１００℃を超える高温環境下では摺動接
点用グリ−スとしては使用できない。Since the greases of Comparative Examples 1 and 2 are greases corresponding to the conventional fluorine grease, the grease was heated at 150 ° C.
At 500 h for less discoloration and good thermal stability, but the contact resistance was higher than before the test,
It is also large after heating at 0 ° C. for 500 hours. Such grease cannot be used as grease for sliding contacts.
The grease of Comparative Examples 3 to 7 was 500 hours at 150 ° C.
Heating causes significant discoloration and hardening, increasing contact resistance, and cannot be used as grease for sliding contacts in a high-temperature environment exceeding 100 ° C.
【００２０】[0020]
【発明の効果】本発明の摺動接点用グリ−スは、雰囲気
温度１００℃を超える高温環境下において、長期間使用
できるという効果を有する。The grease for a sliding contact of the present invention has an effect that it can be used for a long time in a high-temperature environment exceeding an ambient temperature of 100 ° C.
【図１】接点耐環境試験の接触抵抗測定に用いられる機
器の接触抵抗測定部分の概略図である。FIG. 1 is a schematic view of a contact resistance measuring portion of a device used for measuring contact resistance in a contact environment resistance test.
【図２】本実施例の摺動接点用グリ−スを用いた場合の
接触抵抗測定結果を示す図である。FIG. 2 is a view showing a measurement result of contact resistance when the grease for a sliding contact of the present embodiment is used.
【図３】比較例の摺動接点用グリ−スを用いた場合の接
触抵抗測定結果を示す図である。FIG. 3 is a view showing a measurement result of contact resistance when a grease for a sliding contact of a comparative example is used.
１ 試験グリ−ス ２ 銀板 ３ 銅製半球型リベット 1 Test grease 2 Silver plate 3 Copper hemispherical rivet
フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ１０Ｍ 113:08） Ｃ１０Ｎ 10:06 30:08 40:02 40:14 50:10 Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat II (reference) C10M 113: 08) C10N 10:06 30:08 40:02 40:14 50:10
Claims (1)
度を有するパ−フルオロポリエ−テル油の群から選択さ
れる１種または２種以上の混合物９０．０〜９９．５質
量％と、ＢＥＴ法による比表面積が８０ｍ2 ／ｇ以上の
シリカ及び酸化アルミニウムの群から選択される１種ま
たは２種以上の混合物０．５〜１０質量％からなること
を特徴とする摺動接点用グリ−ス。1. A mixture of 90.0 to 99.5% by weight of one or more mixtures selected from the group of perfluoropolyether oils having a kinematic viscosity at 40 ° C. of from 15 to 510 mm 2 / s, A grease for a sliding contact, wherein the grease for the sliding contact comprises 0.5 to 10% by mass of a mixture of at least one selected from the group consisting of silica and aluminum oxide having a specific surface area of at least 80 m @ 2 / g by the BET method. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28866898A JP4112094B2 (en) | 1998-09-28 | 1998-09-28 | Sliding contact grease |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28866898A JP4112094B2 (en) | 1998-09-28 | 1998-09-28 | Sliding contact grease |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000104091A true JP2000104091A (en) | 2000-04-11 |
| JP4112094B2 JP4112094B2 (en) | 2008-07-02 |
Family
ID=17733141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28866898A Expired - Fee Related JP4112094B2 (en) | 1998-09-28 | 1998-09-28 | Sliding contact grease |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4112094B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002250353A (en) * | 2000-12-18 | 2002-09-06 | Nsk Ltd | Rolling bearing |
| US20140155306A1 (en) * | 2011-06-17 | 2014-06-05 | KLUBER LUBRICATION MUNCHEN SE & Co. KG | Lubricating Grease Based On Perfluoropolyether |
-
1998
- 1998-09-28 JP JP28866898A patent/JP4112094B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002250353A (en) * | 2000-12-18 | 2002-09-06 | Nsk Ltd | Rolling bearing |
| JP4599769B2 (en) * | 2000-12-18 | 2010-12-15 | 日本精工株式会社 | Rolling bearing |
| US20140155306A1 (en) * | 2011-06-17 | 2014-06-05 | KLUBER LUBRICATION MUNCHEN SE & Co. KG | Lubricating Grease Based On Perfluoropolyether |
| JP2014519542A (en) * | 2011-06-17 | 2014-08-14 | 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 | Lubricating grease based on perfluoropolyether |
| US9309479B2 (en) * | 2011-06-17 | 2016-04-12 | KLUBER LUBRICATION MUNCHEN SE & Co. KG | Lubricating grease based on perfluoropolyether |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4112094B2 (en) | 2008-07-02 |
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