Shin-Etsu Chemical Co., Ltd.

Kenichi Takita

Masaharu Takahashi

Kunio Itoh

Takeo Yoshida

Susumu Sekiguchi

Kunihiko Mita

Takao Uno

A fluorosilicone rubber composition is provided comprising (A) a first organopolysiloxane having the formula: RRRSiOwherein Ris trifluoropropyl, Ris an aliphatic unsaturated hydrocarbon group, Ris an aliphatic saturated hydrocarbon or aromatic hydrocarbon group, (B) a silica filler, (C) a second organopolysiloxane having formula (2) wherein Ris an aliphatic unsaturated hydrocarbon group or the like, and (D) a cure catalyst. The fluorosilicone rubber composition affords satisfactory adhesion at the interface with dimethylsilicone rubber even when the molding pressure is low. 

Fluorosilicone rubber composition and molded rubber article

In a fluorosilicone rubber composition comprising (A) an organopolysiloxane having trifluoropropyl and (B) a silica filler, there are included (C) an organic peroxide of percarbonate type as a crosslinking agent and (D) a compound having a molecular weight of up to 10,000 and bearing in a molecule at least two substituents selected from among allyl, acryloyl, methacryloyl, epoxy and alkoxy groups as a co-crosslinking agent, whereby the vulcanization molding time is substantially reduced without detracting from physical properties.

Fluorosilicone rubber compositions

To a fluorosilicone rubber composition comprising an organopolysiloxane having trifluoropropyl groups, a microparticulate silica filler, and a curing agent, there is added a specific amount of a linear organopolysiloxane oil having trifluoropropylmethylsiloxy groups in its backbone and having no crosslinked points in its molecule. The composition cures into fluorosilicone rubber experiencing minimized swell upon immersion in fuel oil and having satisfactory mechanical strength.

An oil-bleeding silicone rubber composition comprising (A) an alkenyl-containing organopolysiloxane, (B) finely divided silica, (C) a silicone bleed oil having methyl and phenyl groups attached to substantially all silicon atoms, and (D) another silicone bleed oil. When molded in a mold, the composition satisfies both the requirements of minimized mold contamination and smooth mold release.

Oil-bleeding silicone rubber compositions

The present invention provides nonflammable silicone rubber compositions which exhibit a superior non-inflammability and a reduced toxicity due to by-products generated during vulcanization and forming processes.

Nonflammable silicone rubber compositions

A self-adhering silicone composition comprising;

Growing community of inventors

Annaka, Japan

Kenichi Takita