Heat-curable silicone rubber compositions

Details Heat-curable silicone rubber compositions Heat-curable silicone rubber compositions

1994-10-20

1996-10-29

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524210, 524211, 524588, 524714, 524796, 524862, 528 15, 528 22, C08K 554, C08L 8307, C08G 7706

Patent

active

055696880

ABSTRACT:
To a heat-curable silicone rubber composition comprising (a) an organopolysiloxane having at least two alkenyl groups in a molecule, (b) an organohydrogenpolysiloxane having at least two hydrogen atoms in a molecule, and (c) a platinum catalyst is added (d) ammonia or an ammonia precursor so that ammonia or ammonia precursor is present in an amount of 10 to 500 parts by weight of nitrogen per million parts by weight of the total of components (a), (b) and (c) in a cured product of the heat-curable silicone rubber composition. The composition cures into a silicone rubber having minimized compression set without a need for secondary vulcanization.

REFERENCES:
patent: 3950299 (1976-04-01), Itoh et al.
patent: 4163081 (1979-07-01), Schulz
patent: 4785047 (1988-11-01), Jensen

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