Shin-etsu Chemical Co., Ltd.

Mitsui Chemicals, Inc.

Atsuhito Kashima

Osamu Hayashida

Kazuhiro Oishi

Noriyuki Meguriya

Yoshiaki Koike

Takao Uno

Kenji Iida

Masakatsu Hotta

Akira Sannomiya

A fluorosilicone rubber composition is provided comprising (A) a fluorosilicone gum having an aliphatic unsaturated monovalent hydrocarbon group content of 0.03-1 mol % based on the total of monovalent hydrocarbon groups and a residual alkali metal content of up to 20 ppm, (B) reinforcing silica having a specific surface area of 50-100 m/g, and (C) an organic peroxide catalyst. The composition is molded into silicone rubber parts which are improved in compression set even after immersion in &#x3b5;-caprolactam.

Fluorosilicone rubber composition

A fluorosilicone rubber composition comprising (A) an alkenyl-rich fluorosilicone gum, (B) an alkenyl-poor fluorosilicone gum, (C) reinforcing silica, and (D) a curing catalyst cures into a product which experiences little change of physical strength even after immersion in alcohol-containing fuel oil.

A fluorosilicone rubber composition is provided. This composition comprises (A) 100 parts by weight of a fluorosilicone rubber compound, (B) 0.1 to 10 parts by weight of an activated carbon at a pH of up to 9, and (C) a catalytic amount of a curing catalyst. The fluorosilicone rubber composition of the invention can be used in producing a fluorosilicone rubber molded article (cured article) which is less likely to experience loss of its physical properties when brought in contact with an amine antiaging agent. Such fluorosilicone rubber molded article is suitable for use in applications such as rubber parts used near cargo plane engines.

Fluorosilicone rubber compound and rubber part for use near cargo plane engines

A crosslinkable rubber composition includes, as essential components: wherein n is an integer of 0 to 10, Ris H or an alkyl group, and Ris H or an alkyl group, wherein Ris H or an alkyl group, and which has a viscosity of not less than 10 Pa&#xb7;s and less than 1,000 Pa&#xb7;s at 25&#xb0; C. under a shear rate of 10 s; wherein Ris a monovalent hydrocarbon group;

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Annaka, Japan

Atsuhito Kashima