Patent ID: 7838616

Claim:
A perfluoropolyether rubber composition, comprising (A) 100 parts by weight of an alkenyl-containing perfluoropolyether having a backbone skeleton of formula (1): —(Rf—O) q — (1) wherein Rf is a straight or branched perfluoroalkylene group of 1 to 6 carbon atoms and q is an integer of 1 to 500, and containing at least two alkenyl groups in total per molecule, (B) 20 to 400 parts by weight of a silicon-oxygen crosslinked structure having ionic conduction, which is obtained by simultaneously effecting oxidation and hydrolysis on an organoxysilane having an epoxy group and an organoxysilane having a sulfur atom-containing group convertible into a sulfonic group through oxidation for thereby converting the sulfur atom-containing group into the sulfonic group, to form a sulfonic group-containing siloxane and neutralizing it with a nitrogen-containing compound, and (C) 0.1 to 10 parts by weight of a crosslinker in the form of a peroxide.