Dow Corning Toray Company, Ltd.

Dow Toray Co., Ltd.

Takayoshi Otomo

Tomoko Tasaki

Yuichi Tsuji

Keiji Yoshida

Yoshihiro Yamana

Hidekazu Saito

Katsumi Kihara

Yuji Saito

Kazumasa Hattori

A silicone rubber composition is disclosed. The silicone rubber composition comprises: (A) an organosiloxane having at least two alkenyl groups in each molecule; (B) a silica filler; (C) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in each molecule; (D) a hydrosilylation reaction catalyst; and (F) an adhesion promoter. Component (B) is prepared by surface-treating a silica filler with (E) a surface treatment agent in the presence of part or all of component (A). The silicone rubber composition generally exhibits excellent adhesion to various organic resins in contact during curing while simultaneously exhibiting excellent mold releasability with respect to a mold used for the molding thereof.

Silicone rubber composition and composite obtained using the same

A silicone rubber composition comprises: (A) an organopolysiloxane having at least two alkenyl groups in a molecule and free of an aryl group; (B) (B-1) an organosiloxane having in a molecule at least one aryl group, at least one silicon-bonded hydrogen atom, and free of an alkenyl group, or a mixture of components (B-1) and (B-2) an organosiloxane having in a molecule at least one aryl group and at least one alkenyl group; (C) an acrylic compound or a methacrylic compound; (D) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in a molecule and free of an aryl group and an alkenyl group; and (E) a hydrosilylation reaction catalyst. The silicone rubber composition exhibits excellent adhesive properties with respect to diverse organic resins it comes into contact with during its cure, and at the same time possesses excellent mold-release properties with respect to metal dies used for its molding.

Silicone rubber composition and composite made therefrom

A liquid silicone rubber composition comprising an alkenyl group-containing liquid organopolysiloxane, a reinforcing silica filler, an organohydrogenpolysiloxane, a platinum group catalyst, a liquid organopolysiloxane that is free of crosslinking groups and is compatible with the alkenyl group-containing liquid organopolysiloxane, and a liquid organopolysiloxane that is free of crosslinking groups and is incompatible with the alkenyl group-containing liquid organopolysiloxane, wherein the cured material therefrom has a JIS type A durometer hardness of 15 to 26 and a tensile stress at 100% elongation of 0.25 to 0.60 MPa. Also, a through hole-containing sealing member comprising this cured material.

Curable liquid silicone rubber composition for forming a sealing member and sealing member

The present invention provides a polyurethane which is non-sticky, exhibits superior handling properties and superior moldability, and has superior adhesive properties with silicones even if a surface activation treatment is not carried out beforehand. The polyurethane of the present invention contains polyol units and organic polyisocyanate units. The polyol units contain an alkenyl group-containing organopolysiloxane structure in an amount ranging from 0.01 to 20% by weight with respect to the weight of the aforementioned polyurethane.

Polyurethane and manufacturing method therefor, master batch, ink binder, ink composition, thermoplastic polymer composition for molding, molded body, and composite molded body and manufacturing method therefor

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Chiba, Japan

Takayoshi Otomo