Non-agglomerating elastomeric organopolysiloxane particulates pr

Details Non-agglomerating elastomeric organopolysiloxane particulates pr Non-agglomerating elastomeric organopolysiloxane particulates pr

1990-01-19

1991-07-02

Hoke, Veronica P.

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...

523209, 524493, 524588, 524745, C08K 336

Patent

active

050286536

ABSTRACT:
Non-agglomerating elastomeric organopolysiloxane particulates having a mean particle size ranging from 50 .mu.m to 3 mm, uniformly coated with silica powder on the face surfaces thereof and well adapted as a soft filler material for natural or synthetic polymers or as a controlled release dosage form, are produced by (a) forming an oil-in-water emulsion of silicone oils, silica powder, a platinum curing catalyst and, optionally, an active principle such as a medicament or an agrochemical, and then (b) breaking and polyaddition crosslinking such emulsion into the desired particles by heating it to a temperature ranging from 40.degree. to 100.degree. C.

REFERENCES:
patent: 4248751 (1981-02-01), Willing
patent: 4370160 (1983-01-01), Ziemelis
patent: 4594134 (1986-06-01), Hanada et al.
patent: 4761454 (1988-08-01), Oba et al.

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