Patent ID: 8865820

Claim:
A fluorine-containing curable composition comprising (a) 100 parts by weight of a straight chain fluorine-containing polymer having at least two alkenyl groups per molecule represented by the following formula (1): wherein R 1 is independently vinyl group or an alkyl group containing 1 to 4 carbon atoms, R 2 is an alkylene group containing 1 to 6 carbon atoms, R 3 is independently hydrogen atom or an alkyl group containing 1 to 4 carbon atoms which is optionally substituted with fluorine, Rf 1 is a group having a perfluoroalkylene group or a divalent group having perfluoropolyether structure, said polymer having a number average molecular weight of 1,000 to 100,000; (b) a fluorine-containing organosilicon compound having at least 2 hydrogen atoms bonded to the silicon atom per molecule at an amount such that a molar ratio of hydrosilyl group (SiH group) in the component (b) to the alkenyl group in the component (a) is in the range of 0.4 to 5.0; (c) a catalytic amount of a hydrosilylation catalyst; and (d) 1 to 100 parts by weight of a silica filler.