Shin-Etsu Chemical Co., Ltd.

Tokyo Metropolitan University

Shoichi Hasebe

Tsuneo Kimura

Hiroyoshi Kawakami

A room temperature curable organopolysiloxane composition is provided. The composition comprises (I) an organopolysiloxane which is a condensation product of component (A) (an organopolysiloxane comprising RSiOunit and SiOunit and containing 0.02 to 0.12 mol/100 g of hydroxy group bonded to the silicon atom) and component (B) (a diorganopolysiloxane raw rubber having hydroxy group on opposite ends thereof), (II) an organosilane compound having at least 2 hydrolyzable groups bonded to the silicon atom on average per molecule, and/or its partial hydrolytic condensate, (III) a solvent, and (IV) a silica nano particle having its surface modified by a branch structure. The composition is capable of providing a high strength film without incorporating reinforcement fillers, with no curing inhibition by the inorganic nano particles, and without inhibiting gas separation performance realized by the inorganic nano particles.

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Tokyo, Japan

Shoichi Hasebe