Shin-etsu Chemical Co., Ltd.

Morio Oohasi

Hironao Fujiki

Shinichi Sato

Hiroshi Inomata

Mitsuaki Igarashi

A mold releasing resin composition is provided which contains at least one fluorinated compound end-blocked with a dimethylhydrogensiloxane group and optionally having a fluorinated polyether linkage. The composition is applied to the inner surface of a silicone rubber mold and cured thereat before a curable resin is admitted into the mold, cured therein, and then removed from the mold.

Mold releasing resin composition and molding of curable resin using the

A mold-releasable curable organopolysiloxane composition suitable for use as a material of a matrix mold having excellent durability of mold releasability in the preparation of replicas by resin casting is disclosed. The composition comprises, in addition to the conventional ingredients including a vinyl-containing diorganopolysiloxane, an organohydrogenpolysiloxane as a crosslinking agent of the diorganopolysiloxane, a reinforcing silica filler and a platinum compound as a catalyst, a strongly alkaline compound of an alkali metal such as potassium hydroxide, potassium siliconate, lithium siliconate and the like in a limited amount.

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Annaka, Japan

Morio Oohasi