Mold-releasable curable organopolysiloxane composition

Details Mold-releasable curable organopolysiloxane composition Mold-releasable curable organopolysiloxane composition

1991-12-16

1994-02-22

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524861, 524863, 524779, 524847, C08K 336, C08K 322

Patent

active

052887952

ABSTRACT:
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.

REFERENCES:
patent: 3574651 (1971-04-01), Nitzsche et al.
patent: 4258102 (1981-03-01), Traver et al.
patent: 4433096 (1984-02-01), Bokerman et al.
patent: 4467068 (1984-08-01), Maruyama et al.
patent: 4782107 (1988-11-01), Lagarde
patent: 5028653 (1991-07-01), Desmonceau et al.
patent: 5118754 (1992-06-01), Miyakoshi et al.

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