Method for the preparation of fine spherical particles of silico

Details Method for the preparation of fine spherical particles of silico Method for the preparation of fine spherical particles of silico

Filed on

1987-04-30

Date issued

1988-08-02

Examiner

Marquis, Melvyn I.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

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

Other Related Categories

524588, 524861, 528 15, 528 31, 528 32, 525478, C08L 8304

Type

Patent

Status

active

Patent number

047614544

Description

ABSTRACT:
Fine spherical particles of cured silicone elastomer can be prepared by spray-drying an aqueous emulsion of a curable organopolysiloxane composition having a particle diameter not exceeding 20 .mu.m. The organopolysiloxane composition comprises preferably an organopolysiloxane having silicon-bonded vinyl groups, an organohydrogenpolysiloxane having silicon-bonded hydrogen atoms and a platinum catalyst so that curing of the composition may take place in the emulsion before spray-drying or in the course of spray-drying by the addition reaction between the silicon-bonded vinyl groups and the silicon-bonded hydrogen atoms.

REFERENCES:
patent: 4433007 (1984-02-01), Marwitz et al.
patent: 4594134 (1986-06-01), Hanada et al.
patent: 4663397 (1987-05-01), Morita et al.

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