Patent ID: 7332538

Claim:
A heat-curable fluoropolyether rubber composition comprising (A) 100 parts by weight of a straight-chain perfluoropolyether compound represented by the general formula (1): wherein X 1 and X 2 each are hydrogen, methyl, phenyl, or allyl, at least three of Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , and Y 6 are alkenyl groups, the remaining Y groups are substituted or unsubstituted monovalent hydrocarbon groups, r is an integer of 2 to 6, and m and n each are integers such that the number average molecular weight of the compound of formula (1) is 5000 to 25,000, wherein component (A) is one of the compounds represented by the following formulae (1-2) to (1-5) or a mixture thereof: and the alkenyl content in the compound is 0.008 to 0.12 mol/100 grams, (B) 1 to 100 parts by weight of a reinforcing filler, and (C) 0.1 to 5 parts by weight of an organic peroxide.