JP2007204547A - Grease composition for electric contact - Google Patents

Grease composition for electric contact Download PDF

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JP2007204547A
JP2007204547A JP2006022956A JP2006022956A JP2007204547A JP 2007204547 A JP2007204547 A JP 2007204547A JP 2006022956 A JP2006022956 A JP 2006022956A JP 2006022956 A JP2006022956 A JP 2006022956A JP 2007204547 A JP2007204547 A JP 2007204547A
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grease composition
electrical contacts
grease
electrical contact
electrical
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Kyosuke Ikuma
亨介 伊熊
Takashi Okaniwa
隆志 岡庭
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Kyodo Yushi Co Ltd
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Kyodo Yushi Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a grease composition for electric contact capable of effectively reducing the abrasion of copper surface, copper alloy surface and noble metal surface(e.g. silver-plated surface, gold-plated surface) without causing chattering(voltage drop) even at a contact with fine current when used at low temperatures. <P>SOLUTION: The grease composition for electric contact comprises a thickening agent, a base oil and an additive, wherein the additive comprises a quaternary ammonium salt of hectorite. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、電気接点用グリース組成物に関する。さらに詳細には、電気製品、OA機器、車載電装部品等の通電する電流が微小電流でも低接触抵抗を維持し、低温領域でも電圧降下を生じることなく、表面摩耗を抑制する電気接点用グリース組成物に関する。   The present invention relates to a grease composition for electrical contacts. More specifically, a grease composition for electrical contacts that maintains low contact resistance even when the current applied to electrical products, OA equipment, vehicle-mounted electrical components, etc. is very small, and suppresses surface wear without causing a voltage drop even at low temperatures. Related to things.

電気製品、OA機器、車載電装部品や各種設備用機器などの各種摺動電気接点には摩耗防止の目的でグリースが塗布され使用されている。最近、この分野の電気接点は、電気信号を断続させる微小電流で使用されている。接点材料としては、以前は銅、銅合金接点が多く使用されていたが、最近では良好な導電性を確保するため、金属の中で最も導電性が優れ、また酸化されない銀メッキや耐腐食性が優れる金メッキなど貴金属のメッキを施した接点材料が主流となってきた。一般的には、これら貴金属メッキの下地金属には、銅または銅合金が使用されている。   Grease is applied to various sliding electrical contacts such as electrical products, office automation equipment, in-vehicle electrical components and various equipment for the purpose of preventing wear. Recently, electrical contacts in this field have been used with minute currents that interrupt electrical signals. Previously, many copper and copper alloy contacts were used as contact materials. Recently, in order to ensure good conductivity, silver plating and corrosion resistance are the best among metals, and are not oxidized. However, contact materials with precious metal plating such as gold plating have become mainstream. Generally, copper or a copper alloy is used as the base metal for these noble metal platings.

従来は、大電流用のグリースがそのまま微小電流接点にも使用されていた。微小電流用接点グリースには接点材料を摩耗から保護する性能が求められる。しかし、従来のグリースは摩耗抑制効果が弱いため、高い摩擦を受けている接点材料表面、特に貴金属表面接点の貴金属メッキを摩耗させてしまう。また、摩耗により下地金属が表れた場合、銅および銅合金は貴金属と異なり酸化皮膜を形成し易く不導通膜となって電気接点としての機能が失われてしまう。また、接点材料の表面が銀メッキの場合は、空気中に極僅かに存在する硫化性ガスによっても容易に侵され、接触安定性を損なう厚く強固な硫化皮膜を生成するため、銀表面を大気中に存在する硫化性ガスから保護しなければならない。さらに、低温使用時には塗布した接点グリースが増粘により硬くなり過ぎ、そのグリースの絶縁性と相俟って皮膜抵抗となり、通電性を損ない電圧降下(チャタリング)が発生する。   Conventionally, grease for large current has been used as it is for minute current contacts. The contact grease for minute current is required to protect the contact material from abrasion. However, since the conventional grease has a weak wear-inhibiting effect, the contact material surface subjected to high friction, particularly the noble metal plating on the noble metal surface contact, is worn. In addition, when a base metal appears due to wear, copper and copper alloy easily form an oxide film unlike a noble metal, and become a non-conductive film and lose the function as an electrical contact. In addition, when the surface of the contact material is silver-plated, the silver surface is exposed to the atmosphere in order to generate a thick and strong sulfide film that is easily eroded by sulfide gas present in the air and impairs contact stability. It must be protected from sulfurous gases present in it. Furthermore, when used at low temperatures, the applied contact grease becomes too hard due to thickening, and in combination with the insulating properties of the grease, it becomes a film resistance, causing a drop in voltage (chattering) that impairs electrical conductivity.

このような課題に対し、チタネート系カップリング剤及びアルミニウム系カップリング剤からなる群から選ばれる少なくとも1種の添加剤を含む電気接点用グリース組成物が知られている(例えば、特許文献1参照)。また、水酸基を含む脂肪酸および水酸基を含む脂肪酸エステルを含有したグリースが提案されている(例えば、特許文献2参照)。
一方、電気スイッチ用グリースとして、アルキレンオキサイド−多価アルコール付加重合オリゴマーと鎖状炭化水素オリゴマーを含む基油、リチウム石けん及び第4級アンモニウム塩含有粘度鉱物を含むプラスチック潤滑用グリース組成物が提案されている(特許文献3)。
また、脂肪族炭化水素基油、リチウムヒドロキシステアレート、ポリ3弗化塩化エチレン及びコハク酸を含有する電気接点用潤滑組成物も提案されている(特許文献4)。
For such a problem, a grease composition for an electrical contact containing at least one additive selected from the group consisting of a titanate coupling agent and an aluminum coupling agent is known (see, for example, Patent Document 1). ). Further, a grease containing a fatty acid containing a hydroxyl group and a fatty acid ester containing a hydroxyl group has been proposed (see, for example, Patent Document 2).
On the other hand, a grease composition for plastic lubrication containing a base oil containing an alkylene oxide-polyhydric alcohol addition polymerization oligomer and a chain hydrocarbon oligomer, lithium soap, and a viscosity mineral containing a quaternary ammonium salt has been proposed as an electrical switch grease. (Patent Document 3).
In addition, a lubricating composition for electrical contacts containing an aliphatic hydrocarbon base oil, lithium hydroxystearate, poly (3) fluorochloroethylene and succinic acid has been proposed (Patent Document 4).

しかし、近年の厳しい使用条件下では、接点表面の摩耗抑制効果や低温域でのチャタリング性が不十分なケースが発生している。特に、微小電流の接点材料として銀メッキ材を使用した場合、硫化性ガスからの保護、摩耗抑制効果の改善および低温域でのチャタリング性(電圧降下)に充分に効果的なグリースはない。   However, under severe usage conditions in recent years, there have been cases where the contact surface wear-inhibiting effect and chattering properties at low temperatures are insufficient. In particular, when a silver plating material is used as a contact material with a minute current, there is no grease that is sufficiently effective for protection from sulfide gas, improvement of wear suppression effect, and chattering (voltage drop) in a low temperature range.

特開平11−61172JP-A-11-61172 特開2004−67711JP 2004-67711 A 特公平6−43594JP 6-43594 特開昭59−142293JP 59-142293 A

本発明は、微小電流の接点でも低温域での使用においてチャタリング(電圧降下)を発生させることなく、銅表面、銅合金表面、貴金属表面(銀メッキ表面、金メッキ表面等)の摩耗を有効に低減し得る電気接点用グリース組成物を提供することである。   The present invention effectively reduces wear on copper surfaces, copper alloy surfaces, and precious metal surfaces (silver-plated surfaces, gold-plated surfaces, etc.) without causing chattering (voltage drops) even when using contacts at very low currents. It is to provide a grease composition for electrical contacts.

本発明者らは、鋭意研究の結果、特定の添加剤を含むグリース組成物により、上記目的が達成できることを見出し、本発明を完成させるに至った。   As a result of intensive studies, the present inventors have found that the above object can be achieved by a grease composition containing a specific additive, and have completed the present invention.

即ち、本発明は、下記の電気接点用グリース組成物及びその摺動電気接点における使用を提供するものである。
1.増ちょう剤、基油、及び添加剤を含む電気接点用グリース組成物において、添加剤としてヘクトライトの第4級アンモニウム塩を含む電気接点用グリース組成物。
2.第4級アンモニウム塩が、下記の式で表される上記1記載の電気接点用グリース組成物。
1234+
式中R1、R2、R3、及びR4は、同一でも異なっていても良く、炭素原子数1〜22のアルキル基、炭素原子数7のアルアルキル基である。
3.式中R1、R2、R3、及びR4は、同一でも異なっていても良く、炭素原子数1〜22のアルキル基である上記2記載の電気接点用グリース組成物。
4.基油が合成炭化水素油を含む上記1〜3のいずれか1項記載の電気接点用グリース組成物。
5.合成炭化水素油がポリ‐α‐オレフィンである上記3項記載の電気接点用グリース組成物。
6.増ちょう剤がリチウム石けんである上記1〜5のいずれか1項記載の電気接点用グリース組成物。
7.増ちょう剤が12‐ヒドロキシステアリン酸リチウムである上記6記載の電気接点用グリース組成物。
8.合成炭化水素油の40℃における動粘度が9〜40mm2/sである上記4〜7のいずれか1項記載の電気接点用グリース組成物。
9.銅、銅合金又は貴金属表面を有する摺動電気接点用の上記1〜8のいずれか1項記載の電気接点用グリース組成物。
10.銀メッキ表面又は金メッキ表面を有する摺動電気接点用の上記1〜8のいずれか1項記載の電気接点用グリース組成物。
11.銅、銅合金又は貴金属表面を有する摺動電気接点における上記1〜10のいずれか1項記載の電気接点用グリース組成物の使用。
That is, the present invention provides the following grease composition for electrical contacts and its use in sliding electrical contacts.
1. An electrical contact grease composition comprising a thickener, a base oil, and an additive, the electrical contact grease composition comprising a quaternary ammonium salt of hectorite as an additive.
2. The grease composition for electrical contacts according to 1 above, wherein the quaternary ammonium salt is represented by the following formula.
R 1 R 2 R 3 R 4 N +
In the formula, R 1 , R 2 , R 3 and R 4 may be the same or different and are an alkyl group having 1 to 22 carbon atoms and an aralkyl group having 7 carbon atoms.
3. 3. The grease composition for electrical contacts as described in 2 above, wherein R 1 , R 2 , R 3 , and R 4 may be the same or different and are alkyl groups having 1 to 22 carbon atoms.
4). 4. The grease composition for electrical contacts according to any one of 1 to 3 above, wherein the base oil contains a synthetic hydrocarbon oil.
5). 4. The grease composition for electrical contacts as described in 3 above, wherein the synthetic hydrocarbon oil is poly-α-olefin.
6). 6. The grease composition for electrical contacts according to any one of 1 to 5 above, wherein the thickener is lithium soap.
7). 7. The grease composition for electrical contacts as described in 6 above, wherein the thickener is lithium 12-hydroxystearate.
8). 8. The grease composition for an electrical contact according to any one of 4 to 7 above, wherein the synthetic hydrocarbon oil has a kinematic viscosity at 40 ° C. of 9 to 40 mm 2 / s.
9. The grease composition for electrical contacts according to any one of the above 1 to 8 for sliding electrical contacts having a copper, copper alloy or noble metal surface.
10. 9. The grease composition for electrical contacts according to any one of the above 1 to 8 for sliding electrical contacts having a silver-plated surface or a gold-plated surface.
11. Use of the grease composition for an electrical contact according to any one of the above 1 to 10 in a sliding electrical contact having a copper, copper alloy or noble metal surface.

本発明の電気接点用グリース組成物は、微小電流の接点でも低温域での使用においてチャタリング(電圧降下)を発生させることなく、銅表面、銅合金表面、貴金属表面(銀メッキ表面、金メッキ表面等)の摩耗を有効に低減し得る。   The grease composition for electrical contacts of the present invention does not cause chattering (voltage drop) when used in a low temperature region even at a contact point of a minute current, and has a copper surface, a copper alloy surface, a noble metal surface (a silver plating surface, a gold plating surface, etc.) ) Wear can be effectively reduced.

以下本発明について詳細に説明する。
本発明のグリース組成物に使用されるヘクトライトの第4級アンモニウム塩としては、第4級アンモニウム塩が、下記の式で表されるものが好ましい。
1234+
式中R1、R2、R3、及びR4は、同一でも異なっていても良く、炭素原子数1〜22、好ましくは1〜18のアルキル基、炭素原子数7のアルアルキル基である。
具体例としては、トリアルキルアルアルキルアンモニウムヘクトライト(例えば、ジメチルオクタデシルベンジルアンモニウム((CH3)2(C18H37)BnN)ヘクトライト)、ジメチルペンチルオクタデシルアンモニウム((CH3)2(C5H11)(C18H37)N)ヘクトライト)、テトラアルキルアンモニウムヘクトライト(例えば、ジメチルジオクタデシルアンモニウム((CH3)2(C18H37)2N)ヘクトライト)、ジメチルジドコサニルアンモニウム((CH3)2(C22H45)2N)ヘクトライト)、等が挙げられる。
本発明のグリース組成物中、ヘクトライトの第4級アンモニウム塩の含有量は、低温時のチャタリング防止の観点から、グリース組成物全体に対して、好ましくは0.3〜20質量%、さらに好ましくは0.5〜15質量%、最も好ましくは1.0〜10質量%である。
The present invention will be described in detail below.
As the quaternary ammonium salt of hectorite used in the grease composition of the present invention, a quaternary ammonium salt represented by the following formula is preferable.
R 1 R 2 R 3 R 4 N +
In the formula, R 1 , R 2 , R 3 , and R 4 may be the same or different, and are an alkyl group having 1 to 22 carbon atoms, preferably 1 to 18 carbon atoms, and an aralkyl group having 7 carbon atoms. .
Specific examples include trialkylaralkylammonium hectorites (eg, dimethyloctadecylbenzylammonium ((CH 3 ) 2 (C 18 H 37 ) BnN) hectorite), dimethylpentyl octadecyl ammonium ((CH 3 ) 2 (C 5 H 11 ) (C 18 H 37 ) N) hectorite), tetraalkylammonium hectorite (eg, dimethyldioctadecylammonium ((CH 3 ) 2 (C 18 H 37 ) 2 N) hectorite), dimethyldidocosanil Ammonium ((CH 3 ) 2 (C 22 H 45 ) 2 N) hectorite), and the like.
The content of the quaternary ammonium salt of hectorite in the grease composition of the present invention is preferably from 0.3 to 20% by mass, more preferably from the viewpoint of chattering prevention at low temperatures, based on the entire grease composition. Is 0.5 to 15% by mass, most preferably 1.0 to 10% by mass.

本発明のグリース組成物に使用する増ちょう剤としては、既知の脂肪酸金属塩、好ましくは炭素原子数16〜20の脂肪酸金属塩が挙げられる。脂肪酸金属塩の具体例としては、炭素数12のラウリン酸、炭素数14のミリスチン酸、炭素数16のパルミチン酸、炭素数18のステアリン酸、12−ヒドロキシステアリン酸、オレイン酸等の脂肪酸とNa,Liなどの1価の金属塩、Ba,Caなどの2価の金属塩あるいはアルミニウム(Al)などの3価の金属塩が挙げられる。また二塩基酸を含む2種以上の脂肪酸とAl,Ca,Liなどの金属塩、すなわちコンプレックス石けんも挙げられる。リチウム石けん、特に12−ヒドロキシステアリン酸リチウムは、その耐水性、耐熱性および機械安定性が優れており、最も好ましい。
本発明のグリース組成物中、増ちょう剤の含有量は、通常3〜30質量%であり、好ましくは5〜25質量%、さらに好ましくは、5〜15質量%である。これは、本発明のグリース組成物の硬さ(ちょう度)200〜400を得るためのものであり、増ちょう剤の含有量が3質量%以下では得られたグリースは流動状で軟らかすぎ、30質量%を超えると硬すぎる傾向がある。
The thickener used in the grease composition of the present invention includes known fatty acid metal salts, preferably fatty acid metal salts having 16 to 20 carbon atoms. Specific examples of the fatty acid metal salt include fatty acids such as lauric acid having 12 carbon atoms, myristic acid having 14 carbon atoms, palmitic acid having 16 carbon atoms, stearic acid having 18 carbon atoms, 12-hydroxystearic acid, oleic acid, and Na. Monovalent metal salts such as Li and Li, divalent metal salts such as Ba and Ca, and trivalent metal salts such as aluminum (Al). Further, two or more fatty acids containing dibasic acids and metal salts such as Al, Ca, Li, that is, complex soaps are also included. Lithium soap, in particular lithium 12-hydroxystearate, is most preferred because of its excellent water resistance, heat resistance and mechanical stability.
In the grease composition of the present invention, the content of the thickener is usually 3 to 30% by mass, preferably 5 to 25% by mass, and more preferably 5 to 15% by mass. This is for obtaining a hardness (consistency) of 200 to 400 of the grease composition of the present invention. When the content of the thickener is 3% by mass or less, the obtained grease is fluid and too soft, When it exceeds 30% by mass, it tends to be too hard.

本発明に基油として使用する合成炭化水素油としては、例えば、PAO(ポリα‐オレフィン)、ポリブデン、ポリエチレン、α‐オレフィンとエチレンの共重合体などのオレフィン重合物が挙げられる。基油として合成炭化水素油を使用することにより、本発明のグリース組成物は耐樹脂性に優れており、接点周辺で使用されている樹脂材に応力割れを発生させることがない。本発明のグリース組成物の基油には、合成炭化水素油以外の基油(例えば、鉱物油、動植物油、エステル油、エーテル油、ポリグリコール油、シリコーン油)を含むこともできるが、その量は、少ない方が良く、5.0質量%以下、好ましくは3.0%以下、さらに好ましくは1.0質量%以下であり、合成炭化水素油のみであることが最も好ましい。
本発明に使用する基油は、40℃の動粘度が9〜40mm2/sであり、好ましくは17〜30mm2/sである。動粘度が低すぎると、基油が蒸発しやすくなり、耐熱性が低下する。また、動粘度が高すぎると、潤滑油膜が厚くなり電気が通り難くなる。即ち、低温領域で基油の粘度増加が大きく、接触安定性に悪影響を与え、チャタリング(電圧降下)が発生し易くなる。
本発明のグリース組成物が適用される電気接点の材料は、特に限定されないが、銅、銅合金、金、銀等の貴金属、あるいは銅や銅合金の表面に金メッキや銀メッキ等の貴金属メッキを施したものが好ましい。
Examples of the synthetic hydrocarbon oil used as the base oil in the present invention include olefin polymers such as PAO (poly α-olefin), polybutene, polyethylene, and a copolymer of α-olefin and ethylene. By using a synthetic hydrocarbon oil as the base oil, the grease composition of the present invention is excellent in resin resistance and does not cause stress cracking in the resin material used around the contact. The base oil of the grease composition of the present invention may contain a base oil other than the synthetic hydrocarbon oil (for example, mineral oil, animal and vegetable oil, ester oil, ether oil, polyglycol oil, silicone oil). The amount is preferably as small as possible, 5.0% by mass or less, preferably 3.0% or less, more preferably 1.0% by mass or less, and most preferably only synthetic hydrocarbon oil.
The base oil used in the present invention has a kinematic viscosity of 40 ° C. is 9~40mm 2 / s, preferably 17~30mm 2 / s. If the kinematic viscosity is too low, the base oil tends to evaporate, and the heat resistance is reduced. On the other hand, if the kinematic viscosity is too high, the lubricating oil film becomes thick and it becomes difficult to pass electricity. That is, the increase in the viscosity of the base oil is large in a low temperature region, adversely affects the contact stability, and chattering (voltage drop) is likely to occur.
The material of the electrical contact to which the grease composition of the present invention is applied is not particularly limited, but a noble metal such as copper, copper alloy, gold or silver, or noble metal plating such as gold plating or silver plating on the surface of copper or copper alloy. What has been applied is preferred.

本発明のグリース組成物には、その他の添加剤を含有させてもよい。例えば、酸化防止剤、錆止め剤、金属不活性化剤、清浄分散剤、極圧添加剤、消泡剤、抗乳化剤、油性向上剤など、グリースに通常使用される添加剤を単独又は2種以上混合して用いることができる。なお、これら添加剤の添加量は、必要に応じて0.1〜10質量%添加するが、本発明の目的を損なわない程度であれば特に限定されるものではない。
以下、実施例によって本発明をさらに具体的に説明する。
The grease composition of the present invention may contain other additives. For example, antioxidants, rust inhibitors, metal deactivators, detergent dispersants, extreme pressure additives, antifoaming agents, demulsifiers, oiliness improvers, etc. It can be used by mixing. In addition, although the addition amount of these additives adds 0.1-10 mass% as needed, if it is a grade which does not impair the objective of this invention, it will not specifically limit.
Hereinafter, the present invention will be described more specifically with reference to examples.

実施例1〜4、比較例1〜3
下記の表1に示すように、増ちょう剤、基油、添加剤を含有するグリース組成物を調製し、その特性を下記の方法により評価した。結果を表1に示す。表中の数字は質量部である。
実施例及び比較例のグリース組成物に使用した各成分は以下のとおりである。
Examples 1-4, Comparative Examples 1-3
As shown in Table 1 below, grease compositions containing a thickener, a base oil, and additives were prepared, and their characteristics were evaluated by the following methods. The results are shown in Table 1. The numbers in the table are parts by mass.
Each component used for the grease composition of an Example and a comparative example is as follows.

増ちょう剤
1: リチウム石けん(12−ヒドロキシステアリン酸リチウム)
2: ジメチルジオクタデシルアンモニウム((CH3)2(C18H37)2N)ベントナイト
基油: PAO1:動粘度(40℃) 18mm2/s
添加剤
1:ジメチルオクタデシルベンジルアンモニウム((CH3)2(C18H37)BnN)ヘクトライト
2:ジメチルジオクタデシルアンモニウム((CH3)2(C18H37)2N)ヘクトライト
3:ジメチルジオクタデシルアンモニウム((CH3)2(C18H37)2N)ベントナイト
4:ひまし油
Thickener 1: Lithium soap (lithium 12-hydroxystearate)
2: Dimethyldioctadecylammonium ((CH 3 ) 2 (C 18 H 37 ) 2 N) Bentonite base oil: PAO1: Kinematic viscosity (40 ° C.) 18 mm 2 / s
Additive 1: Dimethyloctadecylbenzylammonium ((CH 3 ) 2 (C 18 H 37 ) BnN) hectorite 2: Dimethyl dioctadecyl ammonium ((CH 3 ) 2 (C 18 H 37 ) 2 N) hectorite 3: Dimethyl Dioctadecyl ammonium ((CH 3 ) 2 (C 18 H 37 ) 2 N) bentonite 4: castor oil

摩擦摩耗試験
銀メッキプレートに厚さ0.5mmのグリースを塗布し、トライボギア試験機(新東科学製)に銀メッキリベットと銀メッキプレートをセットし、規定の荷重、摺動速度、摺動距離、温度条件で10万回往復摺動させた後の銀メッキプレートの摩耗深さを測定する。
測定条件
荷重:200gf 摺動速度:70mm/s
摺動距離(片道):20mm 試験温度:25℃
摺動回数:10万回
Friction and wear test Apply 0.5 mm thick grease to the silver plated plate, set the silver plated rivet and silver plated plate on the tribogear testing machine (manufactured by Shinto Kagaku), specified load, sliding speed, sliding distance The wear depth of the silver-plated plate after being reciprocated 100,000 times under temperature conditions is measured.
Measurement condition
Load: 200 gf Sliding speed: 70 mm / s
Sliding distance (one way): 20mm Test temperature: 25 ° C
Number of sliding times: 100,000 times

低温チャタリング試験
銀メッキプレートに厚さ0.5mmのグリースを塗布し、2連型接点環境試験機(山崎精機研究所製)に銀メッキリベットおよび銀メッキプレートをセットする。規定の荷重、電圧・電流をかけ、規定の温度で2時間静置した後、10往復摺動させる(慣らし運転)。再び規定温度で30分保持した後、1摺動目のチャタリング発生時間を測定する。
測定条件
荷重:80gf 摺動速度:70mm/s 摺動距離(片道):20mm
電圧:5V 電流:10mA 試験温度:−40℃
Low temperature chattering test 0.5mm thick grease is applied to a silver plated plate, and a silver plated rivet and a silver plated plate are set in a dual contact environment tester (manufactured by Yamazaki Seiki Laboratories). Apply the specified load, voltage and current, leave it at the specified temperature for 2 hours, and slide it 10 times (break-in operation). After holding again at the specified temperature for 30 minutes, the chattering occurrence time of the first slide is measured.
Measurement condition load: 80 gf Sliding speed: 70 mm / s Sliding distance (one way): 20 mm
Voltage: 5V Current: 10mA Test temperature: -40 ° C

実施例1〜4、比較例1〜7の成分及び試験結果を表1に示す。

Figure 2007204547
Table 1 shows the components and test results of Examples 1 to 4 and Comparative Examples 1 to 7.
Figure 2007204547

添加剤としてヘクトライトの第4級アンモニウム塩を含む実施例1〜4のグリース組成物は、銀メッキプレートにおいて摩耗深さが小さく、低温域でのチャタリング(電圧降下)の発生時間が短い。
これに対して、添加剤としてベントナイトの第4級アンモニウム塩を含む比較例1では、摩耗深さが大きい。添加剤及び増ちょう剤としてベントナイトの第4級アンモニウム塩を含む比較例2では、摩耗深さが大きい。添加剤としてひまし油を含む比較例3では、摩耗深さは小さいが、低温域でのチャタリング(電圧降下)の発生がある。
The grease compositions of Examples 1 to 4 containing hectorite quaternary ammonium salts as additives have a small wear depth in the silver-plated plate and a short chattering (voltage drop) occurrence time in a low temperature region.
In contrast, in Comparative Example 1 containing bentonite quaternary ammonium salt as an additive, the wear depth is large. In Comparative Example 2 containing bentonite quaternary ammonium salt as an additive and thickener, the wear depth is large. In Comparative Example 3 containing castor oil as an additive, the wear depth is small, but chattering (voltage drop) occurs in a low temperature range.

Claims (11)

増ちょう剤、基油、及び添加剤を含む電気接点用グリース組成物において、添加剤としてヘクトライトの第4級アンモニウム塩を含む電気接点用グリース組成物。   An electrical contact grease composition comprising a thickener, a base oil, and an additive, the electrical contact grease composition comprising a quaternary ammonium salt of hectorite as an additive. 第4級アンモニウム塩が、下記の式で表される請求項1記載の電気接点用グリース組成物。
1234+
式中R1、R2、R3、及びR4は、同一でも異なっていても良く、炭素原子数1〜22のアルキル基、炭素原子数7のアルアルキル基である。
The grease composition for electrical contacts according to claim 1, wherein the quaternary ammonium salt is represented by the following formula.
R 1 R 2 R 3 R 4 N +
In the formula, R 1 , R 2 , R 3 and R 4 may be the same or different and are an alkyl group having 1 to 22 carbon atoms and an aralkyl group having 7 carbon atoms.
式中R1、R2、R3、及びR4は、同一でも異なっていても良く、炭素原子数1〜22のアルキル基である請求項2記載の電気接点用グリース組成物。 The grease composition for electrical contacts according to claim 2 , wherein R 1 , R 2 , R 3 and R 4 may be the same or different and are alkyl groups having 1 to 22 carbon atoms. 基油が合成炭化水素油を含む請求項1〜3のいずれか1項記載の電気接点用グリース組成物。   The grease composition for electrical contacts according to any one of claims 1 to 3, wherein the base oil contains a synthetic hydrocarbon oil. 合成炭化水素油がポリ‐α‐オレフィンである請求項3項記載の電気接点用グリース組成物。   The grease composition for electrical contacts according to claim 3, wherein the synthetic hydrocarbon oil is poly-α-olefin. 増ちょう剤がリチウム石けんである請求項1〜5のいずれか1項記載の電気接点用グリース組成物。   The grease composition for electrical contacts according to any one of claims 1 to 5, wherein the thickener is lithium soap. 増ちょう剤が12‐ヒドロキシステアリン酸リチウムである請求項6記載の電気接点用グリース組成物。   The grease composition for electrical contacts according to claim 6, wherein the thickener is lithium 12-hydroxystearate. 合成炭化水素油の40℃における動粘度が9〜40mm2/sである請求項4〜7のいずれか1項記載の電気接点用グリース組成物。 The grease composition for an electrical contact according to any one of claims 4 to 7, wherein the synthetic hydrocarbon oil has a kinematic viscosity at 40 ° C of 9 to 40 mm 2 / s. 銅、銅合金又は貴金属表面を有する摺動電気接点用の請求項1〜8のいずれか1項記載の電気接点用グリース組成物。   The grease composition for an electrical contact according to any one of claims 1 to 8, which is for a sliding electrical contact having a copper, copper alloy or noble metal surface. 銀メッキ表面又は金メッキ表面を有する摺動電気接点用の請求項1〜8のいずれか1項記載の電気接点用グリース組成物。   The grease composition for electrical contacts according to any one of claims 1 to 8, which is for sliding electrical contacts having a silver-plated surface or a gold-plated surface. 銅、銅合金又は貴金属表面を有する摺動電気接点における請求項1〜10のいずれか1項記載の電気接点用グリース組成物の使用。   Use of the grease composition for an electrical contact according to any one of claims 1 to 10 in a sliding electrical contact having a copper, copper alloy or noble metal surface.
JP2006022956A 2006-01-31 2006-01-31 Grease composition for electric contact Pending JP2007204547A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013517A1 (en) 2009-04-21 2010-10-28 NOK Klüber Co., Ltd. Fluorine-based lubricant composition
US8399899B2 (en) 2009-07-01 2013-03-19 Sharp Kabushiki Kaisha Light emitting device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01152197A (en) * 1987-12-08 1989-06-14 Tokai Rika Co Ltd Conductive grease for sliding switch
JPH01182397A (en) * 1988-01-12 1989-07-20 Tokai Rika Co Ltd Grease composition
JPH0337297A (en) * 1989-07-04 1991-02-18 Tokai Rika Co Ltd Grease for use in copper contact

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01152197A (en) * 1987-12-08 1989-06-14 Tokai Rika Co Ltd Conductive grease for sliding switch
JPH01182397A (en) * 1988-01-12 1989-07-20 Tokai Rika Co Ltd Grease composition
JPH0337297A (en) * 1989-07-04 1991-02-18 Tokai Rika Co Ltd Grease for use in copper contact

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010013517A1 (en) 2009-04-21 2010-10-28 NOK Klüber Co., Ltd. Fluorine-based lubricant composition
US8247361B2 (en) 2009-04-21 2012-08-21 Nok Kluber Co., Ltd. Fluorine-based lubricant composition
US8399899B2 (en) 2009-07-01 2013-03-19 Sharp Kabushiki Kaisha Light emitting device

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