Non-agglomerating elastomeric organopolysiloxane particulates pr

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

1990-01-19

1991-11-12

Michl, Paul R.

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...

524837, 524801, 524705, C08J 704

Patent

active

050648942

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 .alpha.,.omega.-dihydroxydiorganopolysiloxane oils, silica powder, a platinum curing catalyst and, optionally, an active principle such as a medicament or an agrochemical, and then (b) breaking and polycondensation crosslinking such emulsion into the desired particles by heating it to a temperature ranging from 40.degree. to 100.degree. C.

REFERENCES:
patent: 4100124 (1978-07-01), Ichikawa et al.
patent: 4590220 (1986-05-01), Bauman et al.
The Merck Index, 9th edition; 1976.

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