Fluorine-containing curable composition and rubber article

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 R1 is independently vinyl group or an alkyl group containing 1 to 4 carbon atoms, R2 is an alkylene group containing 1 to 6 carbon atoms, R3 is independently hydrogen atom or an alkyl group containing 1 to 4 carbon atoms which is optionally substituted with fluorine, Rf1 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.