JP4892282B2 - Lubricating composition for electrical contacts - Google Patents
Lubricating composition for electrical contacts Download PDFInfo
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- JP4892282B2 JP4892282B2 JP2006160911A JP2006160911A JP4892282B2 JP 4892282 B2 JP4892282 B2 JP 4892282B2 JP 2006160911 A JP2006160911 A JP 2006160911A JP 2006160911 A JP2006160911 A JP 2006160911A JP 4892282 B2 JP4892282 B2 JP 4892282B2
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本発明は電気接点用潤滑組成物に関し、特に、電子機器などの機構部品（スイッチ、エンコーダーなど）の摺動電気接点やそれに近接する摺動部分に用いられる電気接点用の潤滑組成物に関する。 The present invention relates to a lubricating composition for electrical contacts, and more particularly to a lubricating composition for electrical contacts used for sliding electrical contacts of mechanical parts such as electronic devices (switches, encoders, etc.) and sliding portions adjacent thereto.
従来の電子機器などの機構部品（スイッチ、エンコーダーなど）の摺動電気接点の保護、及びそれに近接する摺動部分に用いられる潤滑組成物は、シリコーンオイルや合成油をシリカ粉や金属石鹸で増稠した潤滑剤である。電気的に安定な接続を得るためには、シリコーンオイルを用いた潤滑剤が有効であるが、硫化水素のような腐食性ガスを遮断する特性に欠けるので、これを補うために通常硫化防止剤を用いる（特許文献１）。
しかしながら、硫化防止剤の添加によって電気接点の表面に皮膜を形成するため潤滑性は良くなるものの接触抵抗は不安定となり、静止状態の接続安定性は確保されても、外部からの衝撃振動や摺動時のような動的な接続安定性は劣化してしまう。また、接触抵抗を重視して硫化防止を無視したとしても金属同士の接触が強くなるため、摩耗が生じてしまい電気接点の作動寿命が短くなり、昨今の１００万回を越える長寿命の要求を満足しなくなる。 However, the addition of an anti-sulfurizing agent forms a film on the surface of the electrical contact, which improves the lubricity, but the contact resistance becomes unstable, and even if the connection stability in the stationary state is ensured, external impact vibration and sliding Dynamic connection stability such as when moving will deteriorate. Even if the prevention of sulfidization is ignored with an emphasis on contact resistance, the metal-to-metal contact becomes strong, resulting in wear and shortening the operating life of the electrical contact. I'm not satisfied.
同様に、炭化水素油を始めとした合成油の場合には、シリコーンオイルに比較して潤滑油膜が強く、潤滑性やガス遮断性は良好であるが、接触抵抗は安定し難い傾向にある。過去のアナログ回路では静止接続の安定性だけも機能してきたが、近年のデジタル信号処理が電子回路の主流となっている中では使用に耐えない。特に近年の軽薄短小化の電気・電子機器の動向にあって、接触荷重も軽量化し、軽い操作が必要とされるようになって来ると一層この要求は高くなっている。 Similarly, in the case of synthetic oils such as hydrocarbon oils, the lubricating oil film is stronger and the lubricity and gas barrier properties are better than silicone oil, but the contact resistance tends to be difficult to stabilize. In the past analog circuits, only the stability of the static connection has been functioning, but it cannot be used while the digital signal processing in recent years has become the mainstream of electronic circuits. In particular, with the recent trend of light and thin electrical and electronic devices, this demand is further heightened when the contact load is reduced in weight and light operation is required.
これらの要求を溝足するために潤滑剤に研磨剤などを加えると、摺動部の摩耗が著しくなり電気接点の要求作動寿命を満足しない。一方で、シリコーン系潤滑剤は接触安定性に優れた特性は持つものの、シロキサンガスの懸念から使用に当たって制約が設けられる。このため、シリコーンオイルを用いない潤滑剤であって接触の安定性が確保できるものが必要となっている。しかしながら、接触抵抗を安定化することのできる電気接点用潤滑剤が存在しないため、接点の接触力を上げる方法を採らざるを得ないのが実状である。すなわち、２０ｇ以下程度の軽荷重接点において、電気的な接続の安定性を静止状態、摺動状態、及び外的な振動が印加される状態においても確保でき、かつ作動寿命が長い電気接点用潤滑組成物が求められている。 If an abrasive or the like is added to the lubricant in order to satisfy these demands, the sliding portion will be worn significantly and the required operating life of the electrical contacts will not be satisfied. On the other hand, silicone-based lubricants have characteristics excellent in contact stability, but are restricted in use due to concerns about siloxane gas. For this reason, a lubricant that does not use silicone oil and that can ensure the stability of contact is required. However, since there is no electrical contact lubricant capable of stabilizing the contact resistance, the actual situation is that a method for increasing the contact force of the contact must be employed. That is, for light load contacts of about 20 g or less, the electrical connection stability can be ensured even in a stationary state, a sliding state, and a state where external vibration is applied, and the operating life is long. There is a need for a composition.
本発明はかかる点に鑑みてなされたものであり、軽荷重接点においても電気接点部の接触抵抗の安定化及び耐硫化性を損なうことなく、作動寿命を改良した電気接点用潤滑組成物を提供することを目的とする。 The present invention has been made in view of the above points, and provides a lubricating composition for electrical contacts that has improved operating life without impairing the stabilization and sulfidation resistance of the electrical contact portion even at light load contacts. The purpose is to do.
本発明の電気接点用潤滑組成物は、炭化水素油１００重量部と、金属石鹸０．１重量部〜２０重量部と、フッ素オイルを１．０重量部〜１０．０重量部と、フッ素樹脂微粉末０．０１重量部〜５．０重量部と、シリカ微粉末０．０１重量部〜３．０重量部と、一般式Ｒ１ＳＨ（式中、Ｒ１は炭素数１０〜２０の飽和又は不飽和の１価の炭化水素基を示す）及び一般式ＨＳＲ２ＳＨ（式中、Ｒ２は炭素数３〜１６の飽和又は不飽和の２価の炭化水素基を示す）で表わされる化合物からなる群より選ばれるオルガノチオール化合物０．０１重量部〜０．１重量部と、を含有することを特徴とする。 The lubricating composition for electrical contacts of the present invention comprises 100 parts by weight of hydrocarbon oil, 0.1 to 20 parts by weight of metal soap, 1.0 to 10.0 parts by weight of fluoro oil, and fluororesin 0.01 to 5.0 parts by weight of fine powder, 0.01 to 3.0 parts by weight of fine silica powder, and general formula R 1 SH (wherein R 1 is saturated with 10 to 20 carbon atoms) Or an unsaturated monovalent hydrocarbon group) and a compound represented by the general formula HSR 2 SH (wherein R 2 represents a saturated or unsaturated divalent hydrocarbon group having 3 to 16 carbon atoms). An organothiol compound selected from the group consisting of 0.01 parts by weight to 0.1 parts by weight.
この構成によれば、電子機器などの機構部品（スイッチ、エンコーダーなど）の摺動電気接点、及びそれに近接する摺動部分に用いた場合に、電気接点部の接触抵抗の安定化及び耐硫化性を損なうことなく長期の作動耐久性を格段に向上させることができる。 According to this configuration, when used in sliding electrical contacts of mechanical parts such as electronic equipment (switches, encoders, etc.) and sliding parts adjacent thereto, the contact resistance of the electrical contact part is stabilized and sulfide resistance is maintained. The long-term operating durability can be remarkably improved without impairing.
本発明の電気接点用潤滑組成物においては、前記炭化水素油は、脂肪族炭化水素油であって９８．９℃における粘度が１ｃＳｔ〜２０ｃＳｔであることが好ましい。 In the lubricating composition for electrical contacts of the present invention, the hydrocarbon oil is preferably an aliphatic hydrocarbon oil and has a viscosity at 98.9 ° C. of 1 cSt to 20 cSt.
本発明の電気接点用潤滑組成物においては、前記炭化水素油がポリαオレフィンオイルであることが好ましい。 In the lubricating composition for electrical contacts of the present invention, the hydrocarbon oil is preferably a polyalphaolefin oil.
本発明の電気接点用潤滑組成物においては、前記炭化水素油がエチレンとα−オレフィンとのオリゴマーを含むことが好ましい。 In the lubricating composition for electrical contacts of the present invention, the hydrocarbon oil preferably contains an oligomer of ethylene and α-olefin.
本発明の電気接点用潤滑組成物においては、前記金属石鹸がリチウム石鹸であることが好ましい。この場合において、前記リチウム石鹸がリチウムハイドロオキシステアレートであることが好ましい。 In the lubricating composition for electrical contacts of the present invention, the metal soap is preferably lithium soap. In this case, the lithium soap is preferably lithium hydroxystearate.
本発明の電気接点用潤滑組成物においては、前記フッ素オイルがパーフルオロポリエーテルであることが好ましい。 In the lubricating composition for electrical contacts of the present invention, the fluorine oil is preferably perfluoropolyether.
本発明の電気接点用潤滑組成物においては、前記シリカ微粉末の含有量が前記オルガノチオール化合物の含有量よりも多いことが好ましい。 In the lubricating composition for electrical contacts of the present invention, the content of the silica fine powder is preferably larger than the content of the organothiol compound.
本発明の電気接点用潤滑組成物は、炭化水素油１００重量部と、金属石鹸０．１重量部〜２０重量部と、フッ素オイルを１．０重量部〜１０．０重量部と、フッ素樹脂微粉末０．０１重量部〜５．０重量部と、シリカ微粉末０．０１重量部〜３．０重量部と、一般式Ｒ１ＳＨ（式中、Ｒ１は炭素数１０〜２０の飽和又は不飽和の１価の炭化水素基を示す）及び一般式ＨＳＲ２ＳＨ（式中、Ｒ２は炭素数３〜１６の飽和又は不飽和の２価の炭化水素基を示す）で表わされる化合物からなる群より選ばれるオルガノチオール化合物０．０１重量部〜０．１重量部と、を含有するので、電子機器などの機構部品の摺動電気接点、及びそれに近接する摺動部分に用いた場合に、電気接点部の接触抵抗の安定化及び耐硫化性を損なうことなく長期の作動耐久性を格段に向上せしめる効果がある。 The lubricating composition for electrical contacts of the present invention comprises 100 parts by weight of hydrocarbon oil, 0.1 to 20 parts by weight of metal soap, 1.0 to 10.0 parts by weight of fluoro oil, and fluororesin 0.01 to 5.0 parts by weight of fine powder, 0.01 to 3.0 parts by weight of fine silica powder, and general formula R 1 SH (wherein R 1 is saturated with 10 to 20 carbon atoms) Or an unsaturated monovalent hydrocarbon group) and a compound represented by the general formula HSR 2 SH (wherein R 2 represents a saturated or unsaturated divalent hydrocarbon group having 3 to 16 carbon atoms). When containing 0.01 to 0.1 parts by weight of an organothiol compound selected from the group consisting of, when used for sliding electrical contacts of mechanical parts such as electronic devices, and sliding parts adjacent thereto In addition, stabilization of the contact resistance of the electrical contact part and long-term resistance There is an effect that the operating durability is remarkably improved.
以下、本発明の実施の形態について詳細に説明する。
本発明の電気接点用潤滑組成物は、炭化水素油１００重量部と、金属石鹸０．１重量部〜２０重量部と、フッ素オイルを１．０重量部〜１０．０重量部と、フッ素樹脂微粉末０．０１重量部〜５．０重量部と、シリカ微粉末０．０１重量部〜３．０重量部と、一般式Ｒ１ＳＨ（式中、Ｒ１は炭素数１０〜２０の飽和又は不飽和の１価の炭化水素基を示す）及び一般式ＨＳＲ２ＳＨ（式中、Ｒ２は炭素数３〜１６の飽和又は不飽和の２価の炭化水素基を示す）で表わされる化合物からなる群より選ばれるオルガノチオール化合物０．０１重量部〜０．１重量部と、を含有することを特徴とする。
Hereinafter, embodiments of the present invention will be described in detail.
The lubricating composition for electrical contacts of the present invention comprises 100 parts by weight of hydrocarbon oil, 0.1 to 20 parts by weight of metal soap, 1.0 to 10.0 parts by weight of fluoro oil, and fluororesin 0.01 to 5.0 parts by weight of fine powder, 0.01 to 3.0 parts by weight of fine silica powder, and general formula R 1 SH (wherein R 1 is saturated with 10 to 20 carbon atoms) Or an unsaturated monovalent hydrocarbon group) and a compound represented by the general formula HSR 2 SH (wherein R 2 represents a saturated or unsaturated divalent hydrocarbon group having 3 to 16 carbon atoms). An organothiol compound selected from the group consisting of 0.01 parts by weight to 0.1 parts by weight.
本発明の電気接点用潤滑組成物において、基油としては、炭化水素油を用いる。炭化水素油としては、脂肪族炭化水素油でも良く、芳香族炭化水素油でも良い。脂肪族炭化水素油としては、流動パラフィン、ポリα−オレフィンオイル、エチレンとα−オレフィンとのオリゴマー、オレフィンコポリマーなどを挙げることができる。この脂肪族炭化水素油は、潤滑性能、揮発性、粘性抵抗などを考慮して、９８．９℃における粘度が１ｃＳｔ〜２０ｃＳｔのものが好適である。例えば、脂肪族炭化水素油としては、下記一般式（１）で表わされるポリα−オレフィンオリゴマーにおいて、有機基Ｒ4として、メチル基、エチル基、プロピル基、ブチル基、アミル基、ヘキシル基、オクチル基などの炭素数が１〜６のアルキル基を含むものが挙げられる。
芳香族炭化水素油としては、ポリフェニルエーテルなどが挙げられる。なお、これらの基油は、それぞれ単独で用いても良く、混合して用いても良い。 Examples of the aromatic hydrocarbon oil include polyphenyl ether. These base oils may be used alone or in combination.
本発明の電気接点用潤滑組成物において、基油に適度の稠度を付与する増稠剤としては、金属石鹸を用いる。金属石鹸としては、アルミニウムステアレート、リチウムステアレート、リチウムヒドロキシステアレート、アルミニウムオレエート、リチウムオレエート、リチウムコンプレックス石鹸などが挙げられる。金属石鹸の中でも、リチウムヒドロキシステアレートは広い温度域で安定した潤滑性、性状安定性を示すので好ましい。これらの増稠剤は、塗布に適した稠どや潤滑性、接触抵抗を考慮して、基油成分１００重量部に対して０．１重量部〜２０重量部の範囲で含まれる。 In the lubricating composition for electrical contacts of the present invention, a metal soap is used as a thickener that imparts an appropriate consistency to the base oil. Examples of the metal soap include aluminum stearate, lithium stearate, lithium hydroxystearate, aluminum oleate, lithium oleate, and lithium complex soap. Among metal soaps, lithium hydroxystearate is preferable because it exhibits stable lubricity and property stability in a wide temperature range. These thickeners are included in the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the base oil component in consideration of consistency, lubricity and contact resistance suitable for application.
本発明の電気接点用潤滑組成物に含まれるフッ素オイルとしては、パーフルオロアルカン、ポリ３フッ化エチレン、パーフルオロポリエーテルなどが挙げられる。パーフルオロポリエーテルは、比較的炭化水素油と混合し易く、化学的性質も安定であることから接触抵抗の安定性、性状の安定性にも優れている。フッ素オイルは、フッ素オイルの種類や基油である炭化水素油の粘度を考慮して、基油成分１００重量部に対して１．０重量部〜１０．０重量部の範囲で含まれる。 Examples of the fluorine oil contained in the lubricating composition for electrical contacts of the present invention include perfluoroalkane, polytrifluorinated ethylene, and perfluoropolyether. Perfluoropolyethers are relatively easy to mix with hydrocarbon oils and are stable in chemical properties, so that they have excellent contact resistance stability and property stability. The fluorine oil is included in the range of 1.0 to 10.0 parts by weight with respect to 100 parts by weight of the base oil component in consideration of the type of the fluorine oil and the viscosity of the hydrocarbon oil as the base oil.
本発明の電気接点用潤滑組成物に含まれるフッ素樹脂微粉末は、潤滑性能、特に６０℃を越える温度域での潤滑性に効果があり、潤滑性能の安定化に必要である。フッ素樹脂微粉末としては、電気接点に異物として障害にならないことを考慮して、平均粒径０．０５μｍ〜２０μｍのものが好ましい。フッ素樹脂微粉末は、接触抵抗の安定化、経済性を考慮して、基油成分１００重量部に対して０．０１重量部〜５．０重量部の範囲で含まれる。なお、フッ素樹脂微粉末の代わりに、グラファイトなどの他の固体潤滑剤を用いても良い。 The fluororesin fine powder contained in the lubricating composition for electrical contacts of the present invention is effective for lubrication performance, particularly lubricity in a temperature range exceeding 60 ° C., and is necessary for stabilization of lubrication performance. The fluororesin fine powder is preferably one having an average particle diameter of 0.05 μm to 20 μm in consideration of the fact that the electric contact does not become an obstacle as a foreign matter. The fluororesin fine powder is contained in the range of 0.01 to 5.0 parts by weight with respect to 100 parts by weight of the base oil component in consideration of stabilization of contact resistance and economy. Other solid lubricants such as graphite may be used instead of the fluororesin fine powder.
本発明の電気接点用潤滑組成物に含まれるシリカ微粉末としては、煙霧質シリカ、沈殿シリカ、シリカエアロゲルなどが挙げられる。シリカ微粉末は、接触抵抗、性状安定化、摺動摩耗などを考慮して、基油成分１００重量部に対して０．０１重量部〜３．０重量部の範囲で含まれる。これらのシリカ微粉末としては、オルガノシラン、ポリオルガノシロキサン、オルガノシラザンなどで表面処理したものを用いても良い。 Examples of the silica fine powder contained in the lubricating composition for electrical contacts of the present invention include fumed silica, precipitated silica, silica airgel, and the like. The silica fine powder is contained in the range of 0.01 to 3.0 parts by weight with respect to 100 parts by weight of the base oil component in consideration of contact resistance, property stabilization, sliding wear, and the like. As these silica fine powders, those treated with organosilane, polyorganosiloxane, organosilazane, etc. may be used.
本発明の電気接点用潤滑組成物に含まれるオルガノチオール化合物は、一般式Ｒ1ＳＨで表わされるオルガノチオール化合物（オルガノメルカプタン）であり、Ｒ1が炭素数１０〜２０、好ましくは１４〜１８の範囲の飽和又は不飽和の１価の炭化水素基である。この炭素数は蒸気圧や接触抵抗を考慮して選択する。これらの条件を満たすオルガノメルカプタンとしては、デシルメルカプタン、ドデシルメルカプタン、テトラデシルメルカプタン、ヘキサデシルメルカプタン、オクタデシルメルカプタン、β−ナフタレンチオールなどが挙げられる。 The organothiol compound contained in the lubricating composition for electrical contacts of the present invention is an organothiol compound (organomercaptan) represented by the general formula R 1 SH, and R 1 has 10 to 20 carbon atoms, preferably 14 to 18 carbon atoms. A saturated or unsaturated monovalent hydrocarbon group in a range. This carbon number is selected in consideration of vapor pressure and contact resistance. Examples of the organomercaptan that satisfies these conditions include decyl mercaptan, dodecyl mercaptan, tetradecyl mercaptan, hexadecyl mercaptan, octadecyl mercaptan, and β-naphthalenethiol.
また、本発明の電気接点用潤滑組成物に含まれるオルガノチオール化合物は、耐硫化性を発揮する成分であり、一般式ＨＳＲ2ＳＨで表わされるオルガノジチオールであり、Ｒ2が炭素数３〜１６の範囲の飽和又は不飽和の２価の炭化水素基である。この炭素数は蒸気圧や接触抵抗を考慮して選択する。これらの条件を満たすオルガノジチオールとしては、１，３−トリメチレンジチオール、１，４−テトラメチレンジチオール、１，５−ペンタメチレンジチオール、１，６−ヘキサメチレンジチオール、１，８−オクタメチレンジチオール、１，１０−デカメチレンジチオールなどが挙げられる。 Moreover, the organothiol compound contained in the lubricating composition for electrical contacts of the present invention is a component that exhibits sulfidation resistance, is an organodithiol represented by the general formula HSR 2 SH, and R 2 has 3 to 16 carbon atoms. And a saturated or unsaturated divalent hydrocarbon group in the range of This carbon number is selected in consideration of vapor pressure and contact resistance. Examples of the organodithiol satisfying these conditions include 1,3-trimethylenedithiol, 1,4-tetramethylenedithiol, 1,5-pentamethylenedithiol, 1,6-hexamethylenedithiol, 1,8-octamethylenedithiol, 1,10-decamethylenedithiol and the like can be mentioned.
オルガノチオール化合物は、耐硫化性、接触抵抗などを考慮して、基油成分１００重量部に対して０．０１重量部〜０．１重量部の範囲で含まれる。また、接触抵抗をより安定化するためには、シリカ微粉末の含有量がオルガノチオール化合物の含有量よりも多いことが好ましい。 The organothiol compound is included in the range of 0.01 parts by weight to 0.1 parts by weight with respect to 100 parts by weight of the base oil component in consideration of resistance to sulfidation, contact resistance and the like. Moreover, in order to stabilize contact resistance more, it is preferable that content of a silica fine powder is larger than content of an organothiol compound.
本発明の電気接点用潤滑組成物は、基油成分及び増稠剤成分を加熱混合し、そこにフッ素オイル、フッ素樹脂微粉末、シリカ微粉末及びオルガノチオール化合物を加えて調合する。また、本発明の電気接点用潤滑組成物においては、本発明の効果を損なわない量的、質的範囲内で、他の添加物、例えば酸化防止剤などを混合しても良い。 The lubricating composition for electrical contacts of the present invention is prepared by heating and mixing a base oil component and a thickener component, and adding fluorine oil, fluororesin fine powder, silica fine powder and organothiol compound thereto. Further, in the lubricating composition for electrical contacts of the present invention, other additives such as an antioxidant may be mixed within a quantitative and qualitative range that does not impair the effects of the present invention.
本発明の電気接点用潤滑組成物において、フッ素オイルは、基油である炭化水素油と増稠剤である金属石鹸とで構成されるベースオイルと混合し難い成分である。そして、このフッ素オイルは、ベースオイルに対して上記混合量、すなわち少量加えている。ベースオイルについては、その潤滑性を向上させるためには、油膜の強度を高める必要があるが、油膜の強度を高めると、荷重に対する油切れが悪くなる。例えば、２０ｇ以下の荷重の電気接点においては、油膜の強度を高くして潤滑性を高くすると、油膜の切れが悪くなり、接触の確実性が低下する恐れがある。したがって、本発明においては、ベースオイルに混ざり難いオイルを積極的に比較的少量加えて、油切れを良くしている。これにより接触抵抗の安定化を図ることが可能となる。なお、ベースオイルに対して混ざり難いオイルであれば、フッ素オイル以外のオイルを用いても良い。 In the lubricating composition for electrical contacts of the present invention, fluorine oil is a component that is difficult to mix with a base oil composed of a hydrocarbon oil as a base oil and a metal soap as a thickener. The fluorine oil is added to the base oil in the amount of the above mixture, that is, a small amount. In order to improve the lubricity of the base oil, it is necessary to increase the strength of the oil film. However, if the strength of the oil film is increased, the oil shortage with respect to the load becomes worse. For example, in an electrical contact having a load of 20 g or less, if the strength of the oil film is increased to increase the lubricity, the oil film may be broken and the reliability of contact may be reduced. Therefore, in the present invention, a relatively small amount of oil that is difficult to mix with the base oil is positively added to improve oil shortage. As a result, the contact resistance can be stabilized. An oil other than fluorine oil may be used as long as it is difficult to mix with the base oil.
本発明の電気接点用潤滑組成物において、シリカ微粉末は、研磨材としての役割を果たし、ベースオイルやフッ素オイルを物理的に油切れする。したがって、上記フッ素オイルとシリカ微粉末とにより、油切れを良好に起こさせて、２０ｇ以下程度の低荷重でも接触抵抗の安定化を図ることができる。また、このシリカ微粉末は、研磨効果を有するので、ごく微量加えることにより、電気接点の作動寿命を長くすることができる。なお、シリカ微粉末の代わりに、フラーレン粒子などを用いても良い。さらに、シリカ微粉末は、ベースオイルとフッ素オイルのような混ざり難いオイルに対してチクソ性を持たせる働きがある。 In the lubricating composition for electrical contacts of the present invention, the silica fine powder plays a role as an abrasive and physically drains the base oil and fluorine oil. Therefore, the fluorine oil and the silica fine powder can cause oil shortage and stabilize the contact resistance even at a low load of about 20 g or less. In addition, since this silica fine powder has a polishing effect, the working life of the electrical contact can be extended by adding a very small amount. In addition, fullerene particles may be used instead of silica fine powder. Further, the silica fine powder has a function of imparting thixotropy to difficult-to-mix oils such as base oil and fluorine oil.
このように、本発明の電気接点用潤滑組成物は、電子機器などの機構部品の摺動電気接点、及びそれに近接する摺動部分に用いた場合に、フッ素オイル及びシリカ微粉末により電気接点部の接触抵抗の安定化を図ることができ、オルガノチオール化合物により耐硫化性を発揮することができる。また、各成分の含有量を調整することにより、接触抵抗の安定化や耐硫化性を損なわずに長期の作動耐久性を格段に向上させることができる。 Thus, the lubricating composition for electrical contacts of the present invention, when used for sliding electrical contacts of mechanical parts such as electronic devices, and sliding parts adjacent thereto, the electrical contact part by fluorine oil and silica fine powder. The contact resistance can be stabilized, and the organothiol compound can exhibit sulfidation resistance. Further, by adjusting the content of each component, long-term operation durability can be remarkably improved without impairing contact resistance stabilization or sulfidation resistance.
次に、本発明の効果を明確にするために行った実施例について説明する。なお、本発明は以下の実施例に限定されるものではない。
（実施例１）
１０ｃＳｔのポリα―オレフィンオイル１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを５重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（パーフルオロアルカン（ダイキン社製、デムナム））を１重量部、フッ素樹脂粉末１重量部、βナフタレンチオール（芳香族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．０５重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例１）。なお、各成分の組成については、下記表１に示す。
Next, examples performed for clarifying the effects of the present invention will be described. In addition, this invention is not limited to a following example.
Example 1
100 parts by weight of 10 cSt poly α-olefin oil was placed in a stainless steel cup, and 5 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 1 part by weight of fluorine oil (perfluoroalkane (Daikin, demnum)), 1 part by weight of fluororesin powder, β-naphthalenethiol (aromatic) 0. 1 part by weight and 0.05 part by weight of silica fine powder (atomaceous silica with a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed 5 times while applying shear using a three-roll mill to obtain a lubricating composition for electrical contacts (Example 1). The composition of each component is shown in Table 1 below.
得られた電気接点用潤滑組成物（実施例１）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に示す。作動寿命試験については、図１に示すエンコーダのスイッチ基板１と摺動子２との間に電気接点用潤滑組成物を塗布し、エンコーダのスイッチを毎分約１００回転動作する専用試験装置で動作させ、動作回数１０万回、１００万回の時点での接触抵抗値及びノイズの発生で判定した。判定においては、３０ｍΩ以下かつノイズ無しを◎とし、５０ｍΩ以下かつノイズ無しを○とし、１００ｍΩ以下かつノイズ小を△とし、１００ｍΩ以上かつノイズ大を×とした。
The obtained lubricating composition for electrical contacts (Example 1) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are shown in Table 2 below. For the operating life test, a lubricant composition for electrical contacts is applied between the encoder switch board 1 and the
高温放置試験については、汎用の恒温槽（タバイ社製ＰＲ−１Ｇ）を８５℃に設定し、 ２５０時間、５００時間放置後の接触抵抗値及びノイズの発生で判定した。判定においては、３０ｍΩ以下かつノイズ無しを◎とし、５０ｍΩ以下かつノイズ無しを○とし、１００ｍΩ以下かつノイズ小を△とし、１００ｍΩ以上かつノイズ大を×とした。 For the high temperature storage test, a general-purpose thermostatic chamber (PR-1G manufactured by Tabai Co., Ltd.) was set to 85 ° C., and the contact resistance value and noise generation after being left for 250 hours and 500 hours were determined. In the judgment, ◎ is 30 mΩ or less and no noise is ◎, 50 mΩ or less and no noise is ○, 100 mΩ or less and noise is △, and 100 mΩ or more and noise is ×.
硫化試験については、山崎精機社製硫化試験機を用い１ｐｐｍの濃度で４０℃、７０％ＲＨに設定し、硫化水素１ｐｐｍ、４０℃、相対湿度７０％〜７５％の環境に２４０時間放置した後の接触抵抗値及び接点部の変色状態から判定した。判定においては、５０ｍΩ以下かつ変色軽微を◎とし、１００ｍΩ以下かつ変色小を○とし、２００ｍΩ以下かつ変色中を△とし、２００ｍΩ以上かつ変色大を×とした。 For the sulfidation test, using a sulfidation tester manufactured by Yamazaki Seiki Co., Ltd. at a concentration of 1 ppm, set to 40 ° C. and 70% RH, and left for 240 hours in an environment of 1 ppm hydrogen sulfide, 40 ° C. and relative humidity 70% to 75% The contact resistance value and the discoloration state of the contact part were judged. In the judgment, ◎ is 50 mΩ or less and slight discoloration, ◯ is 100 mΩ or less and small color change, ○ is 200 mΩ or less and during discoloration, and 200 mΩ or more and large discoloration is ×.
なお、接触抵抗の測定は、ＹＨＰ社ミリオームメーター４３３８Ｂを用いた。ノイズについては、５Ｖ、５００μＡでオシロスコープを用いてバウンス状態を測定した。また、変色の程度は目視で判断した。 The contact resistance was measured using a YHP milliohm meter 4338B. About noise, the bounce state was measured using an oscilloscope at 5 V and 500 μA. The degree of discoloration was judged visually.
（実施例２）
１０ｃＳｔのポリα―オレフィンオイル１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを５重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（ポリ３フッ化塩化エチレン（ダイキン社製、ダイフロイル））を３重量部、フッ素樹脂粉末３重量部、βナフタレンチオール（芳香族系）０．０５重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．２重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例２）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例２）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 2)
100 parts by weight of 10 cSt poly α-olefin oil was placed in a stainless steel cup, and 5 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 3 parts by weight of fluorine oil (polytrifluoroethylene chloride (Daikin Co., Ltd., Daifroyl)), 3 parts by weight of fluororesin powder, β-naphthalenethiol (aromatics) ) 0.05 part by weight and 0.2 part by weight of silica fine powder (hazy silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed five times while applying shear using a three-roll mill to obtain a lubricating composition for electrical contacts (Example 2). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 2) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例３）
６ｃＳｔのエチレンとα−オレフィンのオリゴマー（ルーカント）１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを５重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（ポリ３フッ化塩化エチレン（ダイキン社製、ダイフロイル））を３重量部、フッ素樹脂粉末１重量部、ステアリルメルカプタン（脂肪族系）０．０５重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．１重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例３）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例３）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 3)
100 parts by weight of 6 cSt ethylene and α-olefin oligomer (Lucant) was placed in a stainless steel cup, and 5 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 3 parts by weight of fluorine oil (polytrifluoroethylene chloride (manufactured by Daikin, Daifroyl)), 1 part by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0.05 parts by weight and 0.1 parts by weight of silica fine powder (atomaceous silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed 5 times while applying shear using a three-roll mill to obtain a lubricating composition for electrical contacts (Example 3). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 3) was subjected to an operating life test, a high temperature storage test, and a sulfurization property test. The results are also shown in Table 2 below.
（実施例４）
フェニルエーテル（１５．８ｍｍ2／ｓ、４０℃）１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを３重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（ポリ３フッ化塩化エチレン（ダイキン社製、ダイフロイル））を５重量部、フッ素樹脂粉末１重量部、ステアリルメルカプタン（脂肪族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．２重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例４）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例４）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
Example 4
100 parts by weight of phenyl ether (15.8 mm 2 / s, 40 ° C.) was put in a stainless steel cup, and further 3 parts by weight of lithium hydroxystearate was added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 5 parts by weight of fluorine oil (polytrifluoroethylene chloride (manufactured by Daikin, Daifroyl)), 1 part by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0.1 part by weight and 0.2 part by weight of silica fine powder (hazy silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, a lubricating composition for electrical contacts was obtained by passing 5 times while applying shear using a three-roll mill (Example 4). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 4) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例５）
１０ｃＳｔのポリα―オレフィンオイル８０重量部とフェニルエーテル（１５．８ｍｍ2／ｓ、４０℃）２０重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを５重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（パーフルオロアルカン（ダイキン社製、デムナム））を５重量部、フッ素樹脂粉末３重量部、ステアリルメルカプタン（脂肪族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．１重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例５）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例５）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 5)
80 parts by weight of 10 cSt poly α-olefin oil and 20 parts by weight of phenyl ether (15.8 mm 2 / s, 40 ° C.) were placed in a stainless steel cup, and 5 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 5 parts by weight of fluorine oil (perfluoroalkane (Daikin, demnum)), 3 parts by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0.1 Part by weight and 0.1 part by weight of silica fine powder (atomaceous silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed 5 times while applying shear using a three roll mill to obtain a lubricating composition for electrical contacts (Example 5). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 5) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例６）
６ｃＳｔのエチレンとα−オレフィンのオリゴマー（ルーカント）１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを５重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（パーフルオロアルカン（ダイキン社製、デムナム））を５重量部、フッ素樹脂粉末３重量部、ステアリルメルカプタン（脂肪族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．２重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例６）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例６）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 6)
100 parts by weight of 6 cSt ethylene and α-olefin oligomer (Lucant) was placed in a stainless steel cup, and 5 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 5 parts by weight of fluorine oil (perfluoroalkane (Daikin, demnum)), 3 parts by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0.1 Part by weight and 0.2 part by weight of silica fine powder (atomaceous silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, a lubricating composition for electrical contacts was obtained by passing 5 times while applying shear using a three-roll mill (Example 6). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 6) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例７）
１０ｃＳｔのポリα―オレフィンオイル１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを５重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（パーフルオロポリエーテル（アウジモント社製、フォンブリン））を３重量部、フッ素樹脂粉末１重量部、βナフタレンチオール（芳香族系）０．０５重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．１重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例７）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例７）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 7)
100 parts by weight of 10 cSt poly α-olefin oil was placed in a stainless steel cup, and 5 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 3 parts by weight of fluoro oil (perfluoropolyether (Audigmont, Fomblin)), 1 part by weight of fluororesin powder, β-naphthalenethiol (aromatic) 0.05 parts by weight and 0.1 parts by weight of silica fine powder (atomaceous silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed 5 times while applying shear using a three roll mill to obtain a lubricating composition for electrical contacts (Example 7). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 7) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例８）
６ｃＳｔのエチレンとα−オレフィンのオリゴマー（ルーカント）１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを３重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（パーフルオロポリエーテル（アウジモント社製、フォンブリン））を５重量部、フッ素樹脂粉末３重量部、ステアリルメルカプタン（脂肪族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．０５重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例８）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例８）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 8)
100 parts by weight of 6 cSt ethylene and α-olefin oligomer (Lucant) was placed in a stainless steel cup, and 3 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 5 parts by weight of fluoro oil (perfluoropolyether (Augmont Co., Fomblin)), 3 parts by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0 .1 part by weight and 0.05 part by weight of silica fine powder (hazy silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed five times while applying shear using a three-roll mill to obtain a lubricating composition for electrical contacts (Example 8). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 8) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例９）
１０ｃＳｔのポリα―オレフィンオイル１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを３重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（パーフルオロポリエーテル（アウジモント社製、フォンブリン））を５重量部、フッ素樹脂粉末５重量部、ステアリルメルカプタン（脂肪族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．１重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例９）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例９）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
Example 9
100 parts by weight of 10 cSt poly α-olefin oil was placed in a stainless steel cup, and 3 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 5 parts by weight of fluoro oil (perfluoropolyether (Augmont, Fomblin)), 5 parts by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0 0.1 part by weight and 0.1 part by weight of silica fine powder (hazy silica with a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed 5 times while applying shear using a three roll mill to obtain a lubricating composition for electrical contacts (Example 9). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 9) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（実施例１０）
６ｃＳｔのエチレンとα−オレフィンのオリゴマー（ルーカント）１００重量部をステンレスカップに入れ、さらにリチウムハイドロオキシステアレートを３重量部加えた。次いで、これをマントルヒーターで２３０℃までゆっくりと撹拌しながら加温した。２００℃を越えると白濁していた液体が透明になり完全に溶解した。次いで、これを冷却し、６０℃程度になったところでフッ素オイル（ポリ３フッ化塩化エチレン（ダイキン社製、ダイフロイル））を５重量部、フッ素樹脂粉末１重量部、ステアリルメルカプタン（脂肪族系）０．１重量部、及びシリカ微粉末（比表面積２００ｍ2／ｇの煙霧質シリカ）０．１重量部をその順に加えてよく撹拌して混合した。室温まで冷却したところで、三本ロールミルを用いて剪断を加えながら５回通して電気接点用潤滑組成物を得た（実施例１０）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（実施例１０）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Example 10)
100 parts by weight of 6 cSt ethylene and α-olefin oligomer (Lucant) was placed in a stainless steel cup, and 3 parts by weight of lithium hydroxystearate was further added. Next, this was heated with a mantle heater to 230 ° C. with slow stirring. When the temperature exceeded 200 ° C, the cloudy liquid became transparent and completely dissolved. Next, this was cooled, and when the temperature reached about 60 ° C., 5 parts by weight of fluorine oil (polytrifluoroethylene chloride (manufactured by Daikin, Daifroyl)), 1 part by weight of fluororesin powder, stearyl mercaptan (aliphatic) 0.1 part by weight and 0.1 part by weight of silica fine powder (hazy silica having a specific surface area of 200 m 2 / g) were added in that order and mixed well with stirring. When cooled to room temperature, it was passed 5 times while applying shear using a three-roll mill to obtain a lubricating composition for electrical contacts (Example 10). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Example 10) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（比較例１）
フッ素オイルを含有しないこと以外は、実施例１と同様にして、電気接点用潤滑組成物を得た（比較例１）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（比較例１）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Comparative Example 1)
A lubricating composition for electrical contacts was obtained in the same manner as in Example 1 except that no fluorine oil was contained (Comparative Example 1). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Comparative Example 1) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
（比較例２）
フッ素樹脂粉末を含有しないこと、βナフタレンチオールの変わりにステアリルメルカプタンを用いること以外は、実施例３と同様にして、電気接点用潤滑組成物を得た（比較例２）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（比較例２）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Comparative Example 2)
A lubricating composition for electrical contacts was obtained in the same manner as in Example 3 except that it did not contain fluororesin powder and that stearyl mercaptan was used instead of β naphthalenethiol (Comparative Example 2). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Comparative Example 2) was subjected to an operating life test, a high temperature storage test, and a sulfurization property test. The results are also shown in Table 2 below.
（比較例３）
オルガノチオール化合物が過剰に加えられたこと以外は、実施例６と同様にして、電気接点用潤滑組成物を得た（比較例３）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（比較例３）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Comparative Example 3)
A lubricating composition for electrical contacts was obtained in the same manner as in Example 6 except that the organothiol compound was added excessively (Comparative Example 3). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Comparative Example 3) was subjected to an operating life test, a high temperature storage test, and a sulfurization property test. The results are also shown in Table 2 below.
（比較例４）
シリカ微粉末を含有しないこと以外は、実施例４と同様にして、電気接点用潤滑組成物を得た（比較例４）。なお、各成分の組成については、下記表１に併記した。得られた電気接点用潤滑組成物（比較例４）について、作動寿命試験、高温放置試験及び硫化特性試験を行った。その結果を下記表２に併記した。
(Comparative Example 4)
A lubricating composition for electrical contacts was obtained in the same manner as in Example 4 except that no silica fine powder was contained (Comparative Example 4). The composition of each component is also shown in Table 1 below. The obtained lubricating composition for electrical contacts (Comparative Example 4) was subjected to an operating life test, a high temperature storage test and a sulfurization property test. The results are also shown in Table 2 below.
表２から分かるように、本発明の電気接点用潤滑組成物（実施例１〜実施例１０）は、電気接点部の接触抵抗の安定化及び耐硫化性を損なうことなく、長い作動寿命を示した。一方、フッ素オイルを含まない電気接点用潤滑組成物（比較例１）は、接触抵抗の安定性が悪く、フッ素樹脂粉末を含まない電気接点用潤滑組成物（比較例２）は、１００万回での作動寿命や硫化特性が悪く、オルガノチオール化合物が過剰に加えられた電気接点用潤滑組成物（比較例３）やシリカ微粉末を含有しない電気接点用潤滑組成物（比較例４）は、接触抵抗の安定化及び耐硫化性がいずれも悪かった。 As can be seen from Table 2, the lubricating compositions for electrical contacts of the present invention (Examples 1 to 10) show a long operating life without impairing the stabilization of contact resistance and sulfidation resistance of the electrical contacts. It was. On the other hand, the lubricating composition for electrical contacts that does not contain fluorine oil (Comparative Example 1) has poor contact resistance stability, and the lubricating composition for electrical contacts that does not contain fluororesin powder (Comparative Example 2) has 1 million cycles. The working life and sulfurization characteristics of the above were poor, and the lubricating composition for electrical contacts (Comparative Example 3) in which the organothiol compound was excessively added and the lubricating composition for electrical contacts (Comparative Example 4) containing no silica fine powder were: Both the contact resistance stabilization and sulfidation resistance were poor.
本発明は上記実施の形態に限定されず、種々変更して実施することが可能である。例えば、構成成分や含有量、配合手順などについては、本発明の範囲を逸脱しない範囲で種々変更して実施することができる。 The present invention is not limited to the embodiment described above, and can be implemented with various modifications. For example, the component, content, blending procedure, and the like can be implemented with various changes without departing from the scope of the present invention.
１ スイッチ基板
２ 摺動子
1
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| JP2000109862A (en) * | 1998-10-07 | 2000-04-18 | Kyodo Yushi Co Ltd | Grease composition for electrical contact |
| JP2005232433A (en) * | 2004-01-19 | 2005-09-02 | Ge Toshiba Silicones Co Ltd | Grease composition for electrical contact |
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2006
- 2006-06-09 JP JP2006160911A patent/JP4892282B2/en active Active
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| US9622947B2 (en) | 2002-10-25 | 2017-04-18 | Foamix Pharmaceuticals Ltd. | Foamable composition combining a polar solvent and a hydrophobic carrier |
| US10117812B2 (en) | 2002-10-25 | 2018-11-06 | Foamix Pharmaceuticals Ltd. | Foamable composition combining a polar solvent and a hydrophobic carrier |
| US8362091B2 (en) | 2003-08-04 | 2013-01-29 | Foamix Ltd. | Foamable vehicle and pharmaceutical compositions thereof |
| US8486374B2 (en) | 2003-08-04 | 2013-07-16 | Foamix Ltd. | Hydrophilic, non-aqueous pharmaceutical carriers and compositions and uses |
| US8795693B2 (en) | 2003-08-04 | 2014-08-05 | Foamix Ltd. | Compositions with modulating agents |
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| JP2007326996A (en) | 2007-12-20 |
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