JPH0229115B2 - DENKISETSUTENYOGURIISU - Google Patents
DENKISETSUTENYOGURIISUInfo
- Publication number
- JPH0229115B2 JPH0229115B2 JP7989781A JP7989781A JPH0229115B2 JP H0229115 B2 JPH0229115 B2 JP H0229115B2 JP 7989781 A JP7989781 A JP 7989781A JP 7989781 A JP7989781 A JP 7989781A JP H0229115 B2 JPH0229115 B2 JP H0229115B2
- Authority
- JP
- Japan
- Prior art keywords
- group
- weight
- parts
- carbon atoms
- grease
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004519 grease Substances 0.000 claims description 33
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 125000004432 carbon atom Chemical group C* 0.000 claims description 16
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 150000001336 alkenes Chemical class 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 125000003342 alkenyl group Chemical group 0.000 claims description 4
- 239000003925 fat Substances 0.000 claims description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 4
- 235000019871 vegetable fat Nutrition 0.000 claims description 4
- 239000008158 vegetable oil Substances 0.000 claims description 4
- 239000010775 animal oil Substances 0.000 claims description 3
- QJAOYSPHSNGHNC-UHFFFAOYSA-N octadecane-1-thiol Chemical compound CCCCCCCCCCCCCCCCCCS QJAOYSPHSNGHNC-UHFFFAOYSA-N 0.000 claims description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 description 17
- -1 fatty acid esters Chemical class 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 229920002545 silicone oil Polymers 0.000 description 6
- 238000005486 sulfidation Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- 235000019737 Animal fat Nutrition 0.000 description 2
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 description 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- 235000021314 Palmitic acid Nutrition 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 235000020778 linoleic acid Nutrition 0.000 description 2
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 235000021313 oleic acid Nutrition 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NUGJYPZRNLPNDM-UHFFFAOYSA-N 16-methylheptadecane-1-thiol Chemical compound CC(C)CCCCCCCCCCCCCCCS NUGJYPZRNLPNDM-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- NNZMLOHQRXHPOZ-UHFFFAOYSA-N docosane-1-thiol Chemical compound CCCCCCCCCCCCCCCCCCCCCCS NNZMLOHQRXHPOZ-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 235000019197 fats Nutrition 0.000 description 1
- YYHYWOPDNMFEAV-UHFFFAOYSA-N icosane-1-thiol Chemical compound CCCCCCCCCCCCCCCCCCCCS YYHYWOPDNMFEAV-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Landscapes
- Lubricants (AREA)
Description
本発明は、電子機器などに用いられる接点用シ
リコーングリースに関するものである。
従来、電子接点用グリースとして、鉱油系のグ
リース、ポリエーテル、ジエステルなどの合成油
系のグリースとともに、シリコーングリースが使
用されてきたが、近年、シリコーングリースの使
用量が多くなつている。その理由は、良好な電気
的性質と化学的安定性をもつうえ、広い温度領域
で使用しうるからである。
しかし、これらの性質のみでは、真に満足され
るとは言えず、種々の改良がなされている。例え
ば、特公昭51−33254号公報は、ポリオルガノシ
ロキサンの脂肪酸エステルとメルカプタン類を添
加することによつて、耐硫化性と接触抵抗の安定
性を改良し、性能不良となつた接点の性能を復活
させる機能を有した電気接点用シリコーングリー
スを提案している。このシリコーングリースは、
種々の接点材料の潤滑剤として優れた効果を発揮
できるが、以下のような問題点を有していること
がわかつた。
電子機器における接点は、電流の接続、切り換
え、音量の調節、その他の目的に使用するが、使
用される条件の一つとして動作寿命がある。接点
圧の高い接点の場合、シリコーングリースでは
5000回程度の反覆動作により、接点が摩耗しはじ
め、接触抵抗の不安定化が生じてくる。更に動作
回数を増すと、接点部分が削られてなくなつてし
まうこともある。これは、シリコーンオイルのみ
の潤滑性能では潤滑膜が保てないことや、シリコ
ーングリース中のシリカ粉が接点材料を摩耗させ
ることが原因と推測される。しかし、接点用グリ
ースとしてシリコーンオイルを用いないと、上述
したとおり良好な電気的性質と化学的安定性が得
られないばかりでなく、広い温度範囲での使用が
できなくなつてしまう。又、シリカ粉などの増稠
剤を用いないとシリコーンオイルのみとなり、シ
リコーンオイルが潤滑部から流れ出て、潤滑性を
損つてしまう。
又、スイツチにおいては、接点圧をより軽くし
たものが市場の主流を占め始めてきている。しか
し、接点圧が軽すぎると、シリコーングリースの
経時的な潤滑性低下により、スイツチを押した
後、スイツチが戻らなくなる現象（この現象をカ
ジリという）が起こる。70℃付近の温度でスイツ
チを操作した場合にも、カジリの現象が発生す
る。
本発明者らは、前述の特公昭51−33254号公報
によつて提案されたシリコーングリースの耐硫化
性及び接触抵抗の安定性を損うことなく、スイツ
チの軽負荷の接点圧でのカジリの防止作用の付与
された電気接点用シリコーングリースを発明し、
更に、このシリコーングリースがボリユームなど
の接点圧の高い接点の動作寿命に対しても効果の
あることを見出して本発明を成すに致つた。
即ち、本発明は、
(A) 平均式
The present invention relates to silicone grease for contacts used in electronic devices and the like. Conventionally, silicone grease has been used as grease for electronic contacts, along with mineral oil-based grease and synthetic oil-based grease such as polyether and diester, but in recent years, the amount of silicone grease used has been increasing. This is because it has good electrical properties and chemical stability, and can be used in a wide temperature range. However, these properties alone cannot be said to be truly satisfactory, and various improvements have been made. For example, Japanese Patent Publication No. 51-33254 improves the sulfidation resistance and stability of contact resistance by adding fatty acid esters of polyorganosiloxane and mercaptans, and improves the performance of contacts with poor performance. We are proposing a silicone grease for electrical contacts that has the function of restoring electrical contacts. This silicone grease
Although it can exhibit excellent effects as a lubricant for various contact materials, it has been found that it has the following problems. Contacts in electronic devices are used for connecting and switching current, adjusting volume, and other purposes, and one of the conditions for their use is their operating life. For contacts with high contact pressure, silicone grease
After about 5,000 repetitions, the contacts begin to wear out and the contact resistance becomes unstable. If the number of operations is increased further, the contact portion may be worn away. This is presumed to be because the lubricating performance of silicone oil alone cannot maintain a lubricating film, and because the silica powder in silicone grease wears out the contact material. However, if silicone oil is not used as the contact grease, not only will it not be possible to obtain good electrical properties and chemical stability as described above, but the product will not be able to be used over a wide temperature range. Moreover, if a thickener such as silica powder is not used, only silicone oil will be left, and the silicone oil will flow out from the lubricated part, impairing lubricity. In addition, switches with lighter contact pressure are beginning to dominate the market. However, if the contact pressure is too light, the lubricity of the silicone grease decreases over time, causing a phenomenon in which the switch does not return after being pressed (this phenomenon is called galling). The galling phenomenon also occurs when the switch is operated at temperatures around 70°C. The present inventors have proposed the silicone grease proposed in Japanese Patent Publication No. 51-33254, which prevents galling under light load contact pressure of a switch, without impairing the sulfidation resistance and stability of contact resistance. Invented silicone grease for electrical contacts that has a preventive effect,
Furthermore, we have discovered that this silicone grease is effective for extending the operating life of contacts with high contact pressure, such as volumetric greases, and have thus completed the present invention. That is, the present invention provides (A) average formula
【式】（ただし、R1
はハロゲン化フエニル基、R2は炭素数３以下
のアルキル基、アルケニル基、及びアリール基
から成る群から選ばれる１価の基、ａ＋ｂは
1.9〜2.7の数で、ａ＋ｂに対するａの比は0.001
〜0.1を満たす数を示し、ｎは下記の粘度を満
足させる正数である）で表わされ、25℃におけ
る粘度が10〜100000cStであるポリオルガノシ
ロキサン又は混合ポリオルガノシロキサン100
重量部、
(B) 一般式
又は
（ただし、R3は炭素数１〜18のアルキル基及
びアルケニル基から成る群より選ばれた１価の
基、R4は炭素数３以下のアルキル基、フエニ
ル基、及びハロゲン化フエニル基から成る群よ
り選ばれる１価の基、ｍは正数を示す）で表わ
されるポリオルガノシロキサンの脂肪酸エステ
ル1.0〜50重量部、
(C) シリカ微粉末0.01〜８重量部、
(D) 一般式R5SH（ただし、R5は炭素数10〜22の
飽和又は不飽和の脂肪族炭化水素基を示す）で
表わされるオルガノメルカプタン0.01〜３重量
部、及び
(E) 動植物油脂又はオレフインの硫化物0.01〜10
重量部
から成ることを特徴とする電気接点用グリースに
関する。
本発明において、グリースの主成分を成す(A)の
ポリオルガノシロキサンは、通常ハロゲン化フエ
ニルシリコーン油と呼ばれるものである。ケイ素
原子に結合せる有機基R1のハロゲン化フエニル
基としては塩素化フエニル基、臭素化フエニル
基、ヨウ素化フエニル基などが例示され、R2と
してはメチル基、エチル基、プロピル基、ビニル
基、アリル基、及びフエニル基が例示され、互い
に同一でも相異なつていてもよい。又、(A)につい
て示された前述の平均式を満足するような、上記
の有機基を含むポリオルガノシロキサンの混合物
を用いてもよく、その場合、例えばポリジメチル
シロキサン、ポリメチルフエニルシロキサン等を
一方の成分として用いても差支えない。分子構造
としては、その主体となるものはジオルガノシロ
キサン単位であり、その他の成分としてモノオル
ガノシロキサン単位、SiO2単位を含んでいても
よく、分子の末端がトリオルガノシリル期で停止
されたものであるが、ａ＋ｂの値が1.9より小さ
いとグリースが硬くなるので使用できず、2.7よ
り大きいと後述の(A)成分の粘度範囲が得られな
い。又、ａ／ａ＋ｂが0.001より小さい場合は経時的
に接触抵抗が不安定となり、0.1より大きい場合
は低温時の流動性が悪くなるので不適当である。
ｎは正数であり、下記の粘度を満足させる数であ
ることが必要である。これらポリオルガノシロキ
サンは温度25℃において10〜100000cStの粘度を
有することが必要であり20〜10000cStの粘度を有
することが好ましい。10cSt未満では、シリコー
ン油の揮発性が大きくなり、且つ得られたグリー
スが流れやすく、事故の原因になるので不適当で
ある。又、100000cStを越えると、粘性抵抗が大
きくなり、接点の潤滑性に悪影響を及ぼしやすい
傾向が認められる。
本発明に用いる(B)成分は、シリコーングリース
の接触抵抗の安定化、潤滑性の向上及び接点の復
活性に役立つばかりでなく、グリースの流れを防
止する働きを持つており、グリースの安定化にも
寄与する。(B)成分の添加量は、(A)成分100重量部
に対して1.0〜50重量部の範囲であり、好ましく
は５〜20重量部の範囲である。添加量が1.0重量
部未満では添加配合の効果が認められず、50重量
部を越えた場合には、添加配合の効果が同効的
で、使用した際電気接点の変色の改良の点からも
好結果は得られない。(B)成分の一般式中のR3と
してはステアリル基等の炭素数１〜18のアルキル
期等が例示され、又R4としては前記(A)成分の平
均式中のR2、R1と同様の基が例示される。
本発明で使用される(C)成分は、接点表面にでき
た絶縁体を研磨して清浄する効果があり、煙霧質
シリカ、シリカエアロゲル、沈澱シリカなどのシ
リカ微粉末であり、比表面積50m2／ｇ以上のもの
が一般に用いられる。比表面積がこれより小さい
と接点の摩耗が起こりやすい。これらのシリカ
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されたものを用
いてもよい。(C)成分の配合量は、(A)成分100重量
部に対して0.01〜８重量部である。８重量部より
多いと、見掛粘度が大きくなり、接点の動作に追
随できないだけでなく、潤滑性の低下を招く。
又、0.01重量部より少ないと、接点材料の表面が
周囲の雰囲気で酸化・硫化されて絶縁体を作つた
際に、表面を研磨して清浄にする効果がないため
接点不良をもたらす。
本発明の(D)の飽和又は不飽和の脂肪族メルカプ
タンは、炭素数10〜22、好ましくは18〜22の範囲
で選ばれる。このようなオルガノメチルカプタン
としては、ステアリルメルカプタン、イソステア
リルメルカプタン、オレイルメルカプタン、エイ
コシルメルカプタン、ドコシルメルカプタンなど
が例示される。炭素数が10未満では蒸気圧が低い
ため、室温において揮発しやすいので不適当であ
り、炭素数が16以下では耐硫化性が十分でないば
かりでなく、70℃付近の温度まで使用されるチユ
ーナー、スイツチの電子機器類においては、経時
的に蒸発していき、安定な耐硫化性を与えるだけ
の量が維持されなくなるからである。又、炭素数
24以上の飽和又は不飽和の脂肪族メルカプタン
は、(A)のポリオルガノシロキサンとの溶解性が著
しく悪く、シリコーングリースの中で均一に分散
することが困難である。更に、炭素数24以上の高
級脂肪酸メルカプタンを使つたシリコーングリー
スは、接触抵抗がはなはだ不安定となる傾向があ
るので、不適当である。又、炭素数が奇数のアル
キルメルカプタンは、工業的に得にくい。本発明
では、工業的に得られやすい点、取扱いが容易な
点で特にステアリルメルカプタンが好ましい。こ
のような(D)成分は、(A)成分100重量部に対して
0.01〜３重量部の範囲内で用いることが必要であ
るが、一般に0.1〜0.5重量部の範囲で用いること
が好ましい。0.01重量部未満では添加配合の効果
が認められない。又、３重量部を越える量では、
飽和又は不飽和の脂肪族メルカプタンを配合した
グリースの接触抵抗が０℃付近以下の温度で著し
く不安定になること、銀接点の摩耗が激しくな
り、導電不良となる機会が多くなる。
本発明の(E)成分は、本発明の目的である電気接
点の潤滑寿命を長くするために必要な成分であつ
て、動物性油脂、植物性油脂、又はオレフインを
イオウと反応させて得られる硫化物である。(E)成
分は、(A)成分100重量部に対して0.01〜10重量部
の範囲で用いることが必要であり、更に0.1〜３
重量部の範囲内で用いることが好ましい。添加量
が0.01重量部未満では添加配合の効果が認められ
ない。又、10重量部を越える量では、電気接点部
の接触抵抗が不安定になるばかりでなく、シリコ
ーングリースの特微である広範囲の温度下での使
用が著しく損なわれることから不適当である。
又、本発明では、(D)成分と(E)成分を同時に添加
して用いることが必要であり、そのどちらか一方
の成分がなくても本発明の目的であるスイツチの
動作寿命を長くすることはできない。
本発明によるグリースは、接点の耐硫化性、接
触抵抗の安定性に優れ、更に、スイツチの軽負荷
の接点圧でのカジリの防止機能が付与された電気
接点用シリコーングリースである。又、接点圧の
高い接点の動作寿命に対しても有効である。
以下、実施例によつて、本発明の説明を行う。
実施例中、部は全て重量部を示し、粘度は25℃に
おける値である。
実施例 １
ベースオイルとして第１表に示すポリオルガノ
シロキサンを用いた。[Formula] (where R 1 is a halogenated phenyl group, R 2 is a monovalent group selected from the group consisting of an alkyl group having 3 or less carbon atoms, an alkenyl group, and an aryl group, a+b is
A number between 1.9 and 2.7, the ratio of a to a+b is 0.001
Polyorganosiloxane or mixed polyorganosiloxane 100 with a viscosity of 10 to 100,000 cSt at 25°C, represented by a number satisfying ~0.1, where n is a positive number satisfying the following viscosity.
Parts by weight, (B) General formula or (However, R 3 is a monovalent group selected from the group consisting of an alkyl group and an alkenyl group having 1 to 18 carbon atoms, and R 4 is an alkyl group having 3 or less carbon atoms, a phenyl group, and a halogenated phenyl group. (C) 0.01-8 parts by weight of silica fine powder, (D) General formula R 5 0.01 to 3 parts by weight of an organomercaptan represented by SH (R 5 represents a saturated or unsaturated aliphatic hydrocarbon group having 10 to 22 carbon atoms), and (E) 0.01 to 3 parts by weight of sulfide of animal or vegetable oil or fat or olefin. Ten
The present invention relates to a grease for electrical contacts, characterized in that it consists of a heavy weight part. In the present invention, the polyorganosiloxane (A) that constitutes the main component of the grease is usually called halogenated phenyl silicone oil. Examples of the halogenated phenyl group as the organic group R 1 to be bonded to the silicon atom include chlorinated phenyl group, brominated phenyl group, and iodinated phenyl group, and as R 2 , methyl group, ethyl group, propyl group, and vinyl group. , allyl group, and phenyl group, which may be the same or different from each other. It is also possible to use mixtures of polyorganosiloxanes containing the above-mentioned organic groups, which satisfy the above-mentioned average formula shown for (A), in which case, for example, polydimethylsiloxane, polymethylphenylsiloxane, etc. may be used as one of the components. The molecular structure is mainly composed of diorganosiloxane units, and may contain monoorganosiloxane units and SiO 2 units as other components, and the terminal end of the molecule is terminated with a triorganosilyl stage. However, if the value of a+b is less than 1.9, the grease becomes hard and cannot be used, and if it is larger than 2.7, the viscosity range of component (A) described below cannot be obtained. Further, if a/a+b is smaller than 0.001, the contact resistance becomes unstable over time, and if it is larger than 0.1, fluidity at low temperatures deteriorates, which is unsuitable.
n is a positive number and needs to be a number that satisfies the following viscosity. These polyorganosiloxanes need to have a viscosity of 10 to 100,000 cSt at a temperature of 25°C, and preferably have a viscosity of 20 to 10,000 cSt. If it is less than 10 cSt, the volatility of the silicone oil will increase and the obtained grease will flow easily, which may cause an accident, so it is unsuitable. Moreover, when it exceeds 100,000 cSt, the viscous resistance increases, which tends to have an adverse effect on the lubricity of the contact. Component (B) used in the present invention not only stabilizes the contact resistance of silicone grease, improves lubricity, and restores the contact, but also has the function of preventing grease flow, thereby stabilizing the grease. It also contributes to The amount of component (B) added is in the range of 1.0 to 50 parts by weight, preferably in the range of 5 to 20 parts by weight, per 100 parts by weight of component (A). If the amount added is less than 1.0 parts by weight, the effect of the additive formulation is not recognized, and if it exceeds 50 parts by weight, the effect of the additive formulation is the same, and it is also effective in terms of improving the discoloration of electrical contacts when used. No good results are obtained. R 3 in the general formula of component (B) is exemplified by an alkyl group having 1 to 18 carbon atoms such as a stearyl group, and R 4 is R 2 and R 1 in the average formula of component (A). Groups similar to are exemplified. Component (C) used in the present invention has the effect of polishing and cleaning the insulator formed on the contact surface, and is fine silica powder such as fumed silica, silica airgel, and precipitated silica, and has a specific surface area of 50 m 2 /g or more is generally used. If the specific surface area is smaller than this, contact wear is likely to occur. These silicas include organosilanes, polyorganosiloxanes,
A material whose surface has been treated with organosilazane or the like may also be used. The blending amount of component (C) is 0.01 to 8 parts by weight per 100 parts by weight of component (A). When the amount is more than 8 parts by weight, the apparent viscosity increases, and not only does it become impossible to follow the movement of the contact, but it also causes a decrease in lubricity.
If the amount is less than 0.01 part by weight, the surface of the contact material will be oxidized and sulfurized in the surrounding atmosphere to form an insulator, but it will not have the effect of polishing and cleaning the surface, resulting in contact failure. The saturated or unsaturated aliphatic mercaptan (D) of the present invention is selected from a range of 10 to 22 carbon atoms, preferably 18 to 22 carbon atoms. Examples of such organomethylcaptan include stearyl mercaptan, isostearyl mercaptan, oleyl mercaptan, eicosyl mercaptan, and docosyl mercaptan. If the number of carbon atoms is less than 10, the vapor pressure will be low and it will easily volatilize at room temperature, making it unsuitable. If the number of carbon atoms is less than 16, not only will the sulfidation resistance be insufficient, but also tuners that can be used up to temperatures around 70℃, This is because in electronic devices such as switches, it evaporates over time and cannot maintain a sufficient amount to provide stable sulfidation resistance. Also, the number of carbons
A saturated or unsaturated aliphatic mercaptan of 24 or more has extremely poor solubility in the polyorganosiloxane (A), and is difficult to uniformly disperse in silicone grease. Furthermore, silicone greases using higher fatty acid mercaptans having 24 or more carbon atoms are unsuitable because their contact resistance tends to be extremely unstable. Furthermore, alkyl mercaptans having an odd number of carbon atoms are difficult to obtain industrially. In the present invention, stearyl mercaptan is particularly preferred because it is easily obtained industrially and is easy to handle. Such component (D) shall be added to 100 parts by weight of component (A).
It is necessary to use it in the range of 0.01 to 3 parts by weight, but it is generally preferable to use it in the range of 0.1 to 0.5 parts by weight. If the amount is less than 0.01 part by weight, the effect of addition and blending will not be observed. In addition, in an amount exceeding 3 parts by weight,
The contact resistance of greases containing saturated or unsaturated aliphatic mercaptans becomes extremely unstable at temperatures below around 0° C., and the wear of silver contacts increases, increasing the chances of poor conductivity. Component (E) of the present invention is a necessary component for extending the lubricating life of electrical contacts, which is the object of the present invention, and is obtained by reacting animal fat, vegetable fat, or olefin with sulfur. It is a sulfide. Component (E) needs to be used in an amount of 0.01 to 10 parts by weight per 100 parts by weight of component (A), and further 0.1 to 3 parts by weight.
It is preferable to use within the range of parts by weight. If the amount added is less than 0.01 part by weight, no effect of the addition blend will be observed. Further, if the amount exceeds 10 parts by weight, it is not appropriate because not only the contact resistance of the electrical contact portion becomes unstable, but also the use under a wide range of temperatures, which is a characteristic of silicone grease, is significantly impaired. In addition, in the present invention, it is necessary to add and use components (D) and (E) at the same time, and even if one of these components is not present, the purpose of the present invention is to extend the operating life of the switch. It is not possible. The grease according to the present invention is a silicone grease for electrical contacts that has excellent contact sulfidation resistance and stability of contact resistance, and is further provided with a function to prevent galling under light load contact pressure of a switch. It is also effective for increasing the operating life of contacts with high contact pressure. The present invention will be explained below with reference to Examples.
In the examples, all parts are by weight, and the viscosity is the value at 25°C. Example 1 Polyorganosiloxanes shown in Table 1 were used as base oils.
【表】
又、動植物油脂又はオレフインの硫化物として
は、第２表に示すものを用いた。表中、Ｓ−１は
ミリスチン酸、パルミチン酸、ステアリン酸、オ
レイン酸及びリノール酸から成る動物性油脂にイ
オウを高温反応させて作つた硫化油脂、Ｓ−２は
パルミチン酸、ステアリン酸、オレイン酸、リノ
ール酸及びリノレン酸から成る植物性油脂にイオ
ウを高温反応させて作つた硫化油脂、Ｓ−３は
C12〜C18の混合α−オレフインとイオウを高温反
応させて作つた硫化オレフインである。[Table] Furthermore, as the sulfides of animal and vegetable oils and fats or olefins, those shown in Table 2 were used. In the table, S-1 is a sulfurized fat made by reacting sulfur with animal fat consisting of myristic acid, palmitic acid, stearic acid, oleic acid, and linoleic acid at high temperature, and S-2 is palmitic acid, stearic acid, and oleic acid. , S-3 is a sulfurized oil made by reacting sulfur with vegetable oil consisting of linoleic acid and linolenic acid at high temperature.
This is a sulfurized olefin made by reacting C12 to C18 mixed α-olefin and sulfur at high temperature.
【表】
第３表に示すような成分でシリコーングリース
１〜11を調製した。ただし、グリース９〜11は比
較例である。シリカ微粉末は、オクタメチルシク
ロテトラシロキサンで表面処理した比表面積200
m2／ｇの煙霧質シリカである。数字は各成分の部
数を示す。又、ポリジメチルシロキサンのステア
リン酸エステルは、下記の分子式のもので、粘度
は28cStである。
これらのグリースを用いて、りん青銅に銀を約
3μの厚さにメツキした接点荷重10ｇのスイツチ
接点の動作力変化及び接触抵抗の変化を測定し
た。その結果を第３表にあわせて示す。動作力
は、スイツチ部品からバネを取り除いて測定し
た。[Table] Silicone greases 1 to 11 were prepared using the ingredients shown in Table 3. However, Greases 9 to 11 are comparative examples. Fine silica powder has a specific surface area of 200 after surface treatment with octamethylcyclotetrasiloxane.
m 2 /g of fumed silica. Numbers indicate the number of copies of each component. Furthermore, the stearate ester of polydimethylsiloxane has the following molecular formula and a viscosity of 28 cSt. Use these greases to add approximately silver to phosphor bronze.
Changes in operating force and changes in contact resistance were measured for a switch contact plated to a thickness of 3μ with a contact load of 10g. The results are also shown in Table 3. Actuation forces were measured with the spring removed from the switch components.
Claims (1)
３以下のアルキル基、アルケニル基、及びアリ
ール基から成る群から選ばれる１価の基、ａ＋
ｂは1.9〜2.7の数で、ａ＋ｂに対するａの比は
0.001〜0.1を満たす数を示し、ｎは下記の粘度
を満足させる正数である）で表わされ、25℃に
おける粘度が10〜100000cStであるポリオルガ
ノシロキサン又は混合ポリオルガノシロキサン
100重量部、 (B) 一般式 又は （ただし、R3は炭素数１〜18のアルキル基及
びアルケニル基から成る群より選ばれた１価の
基、R4は炭素数３以下のアルキル基、フエニ
ル基、及びハロゲン化フエニル基から成る群よ
り選ばれる１価の基、ｍは正数を示す）で表わ
されるポリオルガノシロキサンの脂肪酸エステ
ル1.0〜50重量部、 (C) シリカ微粉末0.01〜８重量部、 (D) 一般式R5SH（ただし、R5は炭素数10〜22の
飽和又は不飽和の脂肪族炭化水素基を示す）で
表わされるオルガノメルカプタン0.01〜３重量
部、及び (E) 動植物油脂又はオレフインの硫化物0.01〜10
重量部 から成ることを特徴とする電気接点用グリース。 ２ (A)の25℃における粘度が20〜10000cStであ
る、特許請求の範囲第１項記載のグリース。 ３ (B)の添加量が５〜20重量部である、特許請求
の範囲第１項記載のグリース。 ４ (D)が炭素数18〜22のオルガノメルカプタンで
ある、特許請求の範囲第１項記載のグリース。 ５ (D)がステアリルメルカプタンである、特許請
求の範囲第２項記載のグリース。 ６ (D)の添加量が0.1〜0.5重量部である、特許請
求の範囲第１項記載のグリース。 ７ (E)の添加量が0.1〜３重量部である、特許請
求の範囲第１項記載のグリース。[Scope of Claims] 1 (A) Average formula [Formula] (where R 1 is a halogenated phenyl group, R 2 is 1 selected from the group consisting of an alkyl group having 3 or less carbon atoms, an alkenyl group, and an aryl group) valence group, a+
b is a number from 1.9 to 2.7, and the ratio of a to a+b is
Polyorganosiloxane or mixed polyorganosiloxane, represented by a number satisfying 0.001 to 0.1, where n is a positive number satisfying the following viscosity, and having a viscosity of 10 to 100,000 cSt at 25°C
100 parts by weight, (B) General formula or (However, R 3 is a monovalent group selected from the group consisting of an alkyl group and an alkenyl group having 1 to 18 carbon atoms, and R 4 is an alkyl group having 3 or less carbon atoms, a phenyl group, and a halogenated phenyl group. (C) 0.01-8 parts by weight of silica fine powder, (D) General formula R 5 0.01 to 3 parts by weight of an organomercaptan represented by SH (R 5 represents a saturated or unsaturated aliphatic hydrocarbon group having 10 to 22 carbon atoms), and (E) 0.01 to 3 parts by weight of sulfide of animal or vegetable oil or fat or olefin. Ten
Grease for electrical contacts characterized by consisting of a heavy part. 2. The grease according to claim 1, wherein (A) has a viscosity of 20 to 10,000 cSt at 25°C. 3. The grease according to claim 1, wherein the amount of (B) added is 5 to 20 parts by weight. 4. The grease according to claim 1, wherein (D) is an organomercaptan having 18 to 22 carbon atoms. 5. The grease according to claim 2, wherein (D) is stearyl mercaptan. 6. The grease according to claim 1, wherein the amount of (D) added is 0.1 to 0.5 parts by weight. 7. The grease according to claim 1, wherein the amount of (E) added is 0.1 to 3 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7989781A JPH0229115B2 (en) | 1981-05-26 | 1981-05-26 | DENKISETSUTENYOGURIISU |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7989781A JPH0229115B2 (en) | 1981-05-26 | 1981-05-26 | DENKISETSUTENYOGURIISU |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57195198A JPS57195198A (en) | 1982-11-30 |
| JPH0229115B2 true JPH0229115B2 (en) | 1990-06-27 |
Family
ID=13703061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7989781A Expired - Lifetime JPH0229115B2 (en) | 1981-05-26 | 1981-05-26 | DENKISETSUTENYOGURIISU |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0229115B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63309589A (en) * | 1987-06-12 | 1988-12-16 | Furukawa Electric Co Ltd:The | Lubricant composition for electric contact |
| JP2559901B2 (en) * | 1990-10-30 | 1996-12-04 | 東芝シリコーン株式会社 | Lubrication / sealant for key cylinder |
| JP4687036B2 (en) * | 2004-08-31 | 2011-05-25 | パナソニック株式会社 | Click section grease |
| JP4892282B2 (en) * | 2006-06-09 | 2012-03-07 | アルプス電気株式会社 | Lubricating composition for electrical contacts |
-
1981
- 1981-05-26 JP JP7989781A patent/JPH0229115B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57195198A (en) | 1982-11-30 |
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