Curable fluorosilicone rubber composition

Details Curable fluorosilicone rubber composition Curable fluorosilicone rubber composition

1987-02-10

1988-05-03

Marquis, Melvyn I.

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...

524268, 524493, 524731, 528 15, 528 31, 528 32, 528 24, 528 42, C08K 554

Patent

active

047421010

ABSTRACT:
A curable fluorosilicone rubber composition comprising particular organopolysiloxane having a fluoroalkyl group and having a viscosity of 1,000 cP or more at 25.degree. C., reinforcing silica powder having a specific surface area of 50 m.sup.2 /g or more, and a vulcanizing agent; which further comprises, as a fluid for bleed, a fluid organopolysiloxane compound represented by General Formula: ##STR1## wherein some R' represent methyl groups and other R' represent phenyl groups; the ratio of the number of the methyl group to the number of the phenyl group in the molecule ranges between 70/30 and 25/75; and n is an integer of 0 to 5.
Rubber obtained by curing of this composition has excellent oil and solvent resistance, thermal resistance and low-temperature resistance which are inherent in ordinary fluorosilicone rubber, and moreover has a good fluid-bleeding property.

REFERENCES:
patent: 4089833 (1978-05-01), Simpson
patent: 4317899 (1982-03-01), Bluestein
patent: 4525528 (1985-06-01), Bush et al.

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