Method for the preparation of silicone rubber composition

Details Method for the preparation of silicone rubber composition Method for the preparation of silicone rubber composition

1989-07-28

1991-05-07

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523209, 523212, 528 15, C08K 906

Patent

active

050137727

ABSTRACT:
A novel method is proposed for the preparation of a curable organopolysiloxane composition which is suitable as a material of a mold-making having excellent mechanical properties and durability in use for replica molding. The method comprises (a) blending a vinyl-containing organopolysiloxane with a hydrophobic reinforcing silica filler and hexamethyl disilazane, optionally, together with water each in a limited amount, (b) subjecting the blend to a heat treatment and (c) admixing the heat-treated blend with an organohydrogenpolysiloxane as a crosslinking agent of the vinyl-containing organopolysiloxane and a platinum compound as a catalyst for promoting the addition reaction between the silicon-bonded vinyl groups and the silicon-bonded hydrogen atoms.

REFERENCES:
patent: 4427801 (1984-01-01), Sweet
patent: 4764577 (1988-08-01), Inoue et al.

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