Method of improving heat stability of pigmentable silicone elast

Details Method of improving heat stability of pigmentable silicone elast Method of improving heat stability of pigmentable silicone elast

1982-07-30

1987-06-30

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524445, 524447, 524493, C08K 336

Patent

active

046771417

ABSTRACT:
A method of improving the heat stability of silicone elastomers is disclosed. An improved pigmentable silicone elastomeric composition is produced by mixing a silicone elastomer composition having a vinyl radical content of from 0.01 to 0.1 percent by weight with a pretreated, white clay having a surface area of less than 50 m.sup.2 /g, said surface containing olefinic unsaturated siloxy groups, and an organic peroxide vulcanizing agent. The improved silicone elastomeric composition is formed, then heated to vulcanize, to yield a silicone elastomer having improved resistance to the effects of elevated temperatures. The improved silicone elastomeric composition is also claimed. The improved silicone elastomeric composition can be pigmented.

REFERENCES:
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patent: 3050491 (1962-08-01), Nitzsche et al.
patent: 3070567 (1962-12-01), Nitzche et al.
patent: 3341489 (1967-09-01), Simpson
patent: 3588318 (1971-06-01), Ollis
patent: 4265800 (1981-05-01), Newton
Ritchie, P. D., Plasticizers, Stabilizers, and Fillers, Iliffe Books, Ltd, London, England, p. 261.
"Silane Coupling Agents in Mineral-Reinforced Elastomers," Union Carbide Corporation, marked F-44715B.

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