Shin-etsu Chemical Co., Ltd.

Tomiyoshi Tsuchida

Masaharu Takahashi

Yoshio Inoue

Tsutomu Nakamura

Naoki Omura

Hiroshi Matsukawa

An expandable conductive-silicone rubber composition includes (A) an organopolysiloxane having at least two alkenyl groups, (B) conductive carbon black, (C) an organic peroxide of the formula: ##STR1## wherein R.sup.2 and R.sup.3 each are a monovalent C.sub.3 -C.sub.10 hydrocarbon group or a group of --SiR.sup.4.sub.3 wherein R.sup.4 is methyl, ethyl or phenyl, X is --(CH.sub.2).sub.n --, --CH.sub.2 --C(CH.sub.3).sub.2 --CH.sub.2 -- or --(C.sub.2 H.sub.4 O).sub.m --C.sub.2 H.sub.4 -- wherein n=2 to 8 and m=1 to 4, (D) an organohydrogenpolysiloxane, (E) a platinum catalyst, and (F) a blowing agent. It is fully stable during shelf storage, has a long pot life, and is rapidly expandable and curable through hot air vulcanization into conductive silicone rubber foam having high conductivity and improved fatigue endurance of sponge cells when the foam is used as a sponge roll.

Expandable conductive silicone rubber composition and conductive sponge

A compound having a group --N.dbd.N-- is added to a conductive silicone rubber composition comprising an organopolysiloxane, conductive carbon black, and an organic peroxide. The composition allows for atmospheric hot air vulcanization with the aid of an organic peroxide irrespective of the inclusion of carbon black and is significantly improved in shelf stability. The conductive silicone rubber resulting therefrom is free of voids or surface tack and has improved heat resistance and conductivity.

Conductive silicone rubber composition

A conductive silicone rubber composition comprising (A) an organopolysiloxane, (B) conductive carbon black, and (C) an organic peroxide is improved in shelf stability by adding (D) a fatty acid or an acid anhydride thereto. The composition is subject to atmospheric hot air vulcanization to form a conductive silicone rubber having improved conductivity and physical properties.

Conductive silicone rubber composition and conductive silicone rubber

A silicone rubber composition comprising (A) an organopolysiloxane, (B) an organic peroxide and (C) carbon black cures under anaerobic conditions into silicone rubber having improved physical properties. A composition further comprising (D) an organopolysiloxane copolymer consisting essentially of M and Q units in a molar M/Q ratio of 6/10 to 9/10 forms an anaerobic adhesive composition which is a useful sealant.

Silicone rubber curing and anaerobic silicone rubber composition therefor

A silicone rubber composition comprising (A) an alkenyl-containing organopolysiloxane, (B) a polycyclic aromatic compound having at least two phenyl groups, and (C) finely divided silica is easy to process and cures to silicone rubber having low hardness while retaining good physical properties.

Low hardness silicone rubber compositions

A conductive silicone rubber composition comprises a conductive silicone rubber composition comprising:

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Annaka, Japan

Tomiyoshi Tsuchida