Room temperature vulcanizable silicon rubber composition

Details Room temperature vulcanizable silicon rubber composition Room temperature vulcanizable silicon rubber composition

1990-04-26

1992-05-12

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523212, 524847, C08K 906

Patent

active

051128853

ABSTRACT:
A room temperature vulcanizable silicone rubber composition is described. The composition comprises an organopolysiloxane which is blocked with a hydroxyl group or hydrolyzable group at ends of the molecular chain thereof, fumed silica which is surface treated with a monoorganosilane of the general formula, R.sup.1 SiY.sub.3, or a monoorganopolysilazane of the general compositional formula, R.sup.1 Si(NH).sub.3/2, wherein R.sup.1 in each formula represents a monovalent hydrocarbon group and each Y represents a hydrolyzable group and which has a specific area of not less than 50 m.sup.2 /g, and an organosilicon compound of the general formula, R.sup.2.sub.1 SiZ.sub.4-1, wherein R.sup.2 represents an unsubstituted or substituted monovalent hydrocarbon group, Z represents a hydrolyzable group, and 1 is a value of 0 or 1, or its partially hydrolyzed product. The composition may further comprise a promoter for the vulcanization.

REFERENCES:
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patent: 3868345 (1975-02-01), Kratel et al.
patent: 4043969 (1977-08-01), Sporck
patent: 4341842 (1982-07-01), Lampe
patent: 4360610 (1982-11-01), Murray et al.
patent: 4384068 (1983-05-01), Bouverot et al.
patent: 4985477 (1991-01-01), Collins et al.

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