Curable fluoropolyether rubber compositions and rubber articles

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...

Reexamination Certificate

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C528S031000, C528S025000, C525S479000, C556S445000

Reexamination Certificate

active

06979710

ABSTRACT:
A curable fluoropolyether rubber composition comprising (A) a straight-chain fluoropolyether compound having at least two alkenyl groups and a perfluoropolyether structure, (B) an organosilicon compound having at least two SiH groups, (C) a perfluoroparaffin or derivative in powder form, at least 80% by weight of which volatilizes off when held in a drier at 200° C. for 4 hours, and which has a melting point of at least 50° C., and (D) a hydrosilylation catalyst cures into a product that exhibits solvent resistance, chemical resistance, weather resistance, water repellency, oil repellency and heat resistance, and is improved in mold release and compression set.

REFERENCES:
patent: 5665846 (1997-09-01), Sato et al.
patent: 5837774 (1998-11-01), Tarumi et al.
patent: 6160074 (2000-12-01), Matsuda et al.
patent: 0 725 113 (2000-09-01), None
patent: 8-199070 (1996-08-01), None
patent: 2990646 (1999-10-01), None
Patent Abstracts of Japan, vol. 2003, No. 12, corresponding to JP 2003 292761 A, Oct. 15, 2003.

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