Curable fluoropolyether compositions and integral molded resin/rubber articles

A curable fluoropolyether composition comprising

• (a) 100 parts by weight of a polyfluorodialkenyl compound having at least two alkenyl groups per molecule,
• (b) a fluorinated organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms (i.e., SiH groups) per molecule in a sufficient amount to provide 0.5 to 5.0 moles of SiH groups per mole of alkenyl groups available from component (a),
• (c) a platinum group compound in an amount to provide 0.1 to 500 ppm of platinum group metal based on the total weight of components (a) and (b),
• (d) 5 to 50 parts by weight of hydrophobic silica powder, and
• (e) 0.01 to 30 parts by weight of a tackifier in the form of at least one silicon compound selected from the general formulae (I), (II), and (III):
• A-(D-B)x-D-A (I)
• C—(B-D)x-B—C (II)
• A-E (III)
• wherein A and B each are a silane or siloxane linkage having at least one silicon-bonded hydrogen atom and optionally a silicon-bonded substituent group, said substituent group, if present, is an unsubstituted hydrocarbon group of 1 to 20 carbon atoms or a monovalent organic group of 1 to 20 carbon atoms having perfluoroalkyl or perfluoropolyether group, A is a monovalent linkage, B is a divalent linkage,
• C, D and E each are a linkage containing at least one group selected from the following formulae (1) to (13) and optionally another group, said other group, if present, is an alkyl and/or alkylene group, C and E are monovalent linkages and D is a divalent linkage, with the proviso that E is a monovalent linkage in which the total number of atoms other than hydrogen and halogen atoms is at least 8,
• x is 0 or a positive number,
• wherein R1 to R9 are each independently a monovalent group selected from the class consisting of hydrogen, halogen, hydroxyl, unsubstituted monovalent hydrocarbon or alkoxy groups of 1 to 20 carbon atoms, and monovalent organic groups of 1 to 20 carbon atoms having perfluoroalkyl or perfluoropolyether group,
• X is a divalent group represented by the formula:
• wherein R10 to R11 are each independently selected from the class consisting of hydrogen, halogen, unsubstituted monovalent hydrocarbon groups of 1 to 20 carbon atoms, and monovalent organic groups of 1 to 20 carbon atoms having perfluoroalkyl or perfluoropolyether group, or R10 to R11, taken together, may form a carbocyclic or heterocyclic ring, and “n” is an integer of at least 2.