Japan Synthetic Rubber Co., Ltd.

Toshiba Silicone Co., Ltd.

Masaaki Takashima

Junichiro Watanabe

Yasuhiko Takemura

Kiyoshi Takeda

Itsuki Umeda

Yoshiaki Zama

Yuichi Funabashi

Makoto Matsumoto

Hiromichi Yoshida

A rubber composition obtained by compounding (B) from 0.005 to 50 parts by weight of an polyorganohydrogensiloxane and (C) from 0.00001 to 1 part by weight of a compound of a transition metal belonging to the group VIII with (A) 100 parts by weight of a rubber-forming polymer mainly comprising (I) from 3 to 70% by weight of a polyorganosiloxane represented by the formula: ##EQU1## wherein R represents a substituted or unsubstituted monovalent organic group, 0.02 to 10 mole % of which being a vinyl group; and a represents a number of from 1.900 to 2.004,

Rubber composition, and oil seal and rubber hose obtained therefrom

A rubber composition that is prepared by reacting an organic peroxide, under shear deformation, with 3-70 parts by weight of silicone rubber (I), 30-97 parts by weight of a saturated elastomer (II) that substantially fails to be crosslinked with an organic peroxide when it is used alone, and 0-20 parts by weight of another elastomer (III) that is co-crosslinkable with component (I) in the presence of an organic peroxide and which is also co-crosslinkable or highly miscible with component (II) [where (I)+(II)+(III)=100 parts by weight].

Rubber composition and vulcanized rubber product

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Tokyo, Japan

Masaaki Takashima