Fluoroelastomer composition

A fluoroelastomer composition comprising:

• 1) a fluoroelastomer consisting essentially of tetrafluoroethylene units, perfluoro(alkyl vinyl ether) units and cyano group containing perfluorovinyl ether units, provided that the alkyl of the perfluoro (alkyl vinyl ether) has 1 to 5 carbon atoms;
• 2) at least one silane coupling agent selected from among compounds represented by the following general formula (I) or (II):
• 20
• wherein each of R represents an alkoxy or alkyl group having 1 to 5 carbon atoms, said alkoxy or alkyl group having a chain in which at least one ether bond may be contained, provided that at least two of the R are alkoxy groups, and
• A represents an alkyl group having 1 to 10 carbon atoms, to which at least one functional group selected from the group consisting of an amino group, a mercapto group, an epoxy group, a vinyl group, a methacryloxy group and halogens is bonded,
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• wherein each of R represents an alkoxy or alkyl group having 1 to 5 carbon atoms, said alkoxy or alkyl group having a chain in which at least one ether bond may be contained, provided that at least two of the R are alkoxy groups,
• R1 represents an alkylene group having 1 to 10 carbon atoms, optionally containing a sulfide group, an ether group or a nitrogen atom bonded with a carbonyl group or sulfonyl group, said carbonyl or sulfonyl group having a chain optionally containing RF defined below,
• B represents:
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• or a carbon to carbon bond directly bonding R1 with RF, and
• RF is a perfluoroalkyl group having 1 to 10 carbon atoms;
• 3) a crosslinking agent;
• and
• 4) an inorganic filler.