Ethylene-propylene organopolysiloxane rubber composition

Details Ethylene-propylene organopolysiloxane rubber composition Ethylene-propylene organopolysiloxane rubber composition

1989-03-30

1990-12-11

Ivy, C. Warren

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524506, C08K 1304, C08L 2316, C08L 8307

Patent

active

049772007

ABSTRACT:
A rubber composition, which forms a vulcanizate having excellent surface properties such as pleasant feeling of touch and slipperiness or lubricity, comprises, in addition to conventional ingredients such as an ethylene-propylene copolymer, organopolysiloxane, reinforcing silica filler, process oil and curing agent, a powder of spherical particles, such as a poly(methyl silsesquioxane) powder, in the form having a particle diameter of 0.1 .mu.m to 50 .mu.m in a limited amount. The rubber composition forms a spongy rubber vulcanizate when vulcanized in the presence of a blowing agent which, by virtue of excellent surface properties, is useful as powder puffs for make-up.

REFERENCES:
patent: 4341675 (1982-07-01), Nakamura
patent: 4376184 (1983-03-01), Itoh
patent: 4761452 (1988-08-01), Itoh

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