Toray Silicone Company Limited

Dow Corning Toray Silicone

Ohi Seisakusho Co., Ltd.

Tadao Ishida

Miyoji Fukayama

Noriyuki Suganuma

Susumu Tanaka

A room temperature-curable organopolysiloxane composition which does not suffer from surface fissuring even when subjected to external stress (e.g., tensile stress, flexural stress) during the course of its cure was prepared and has a composition of a hydroxyl-terminated polydiorganosiloxane, a hydrophobic silica with a silanol titer not exceeding 2.0 mL, a dry-method silica with a silanol titer of at least 5.0 mL, and an oxime group-containing silane or siloxane.

Room temperature-curable organopolysiloxane composition

A room temperature vulcanizable silicone rubber composition is prepared by mixing hydroxyl or alkoxyl endblocked polydiorganosiloxane, crosslinking agent containing at least two water-hydrolyzable radicals, namely alkoxy, ketoximo, alkenyloxy, aminoxy, amino, and amido, and a spindle-shaped calcium carbonate. Curing the composition results in a silicone rubber with improved thermal stability.

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Chiba, Japan

Tadao Ishida