Fluoroelastomer composition, useful for production of molded articles, comprises fluoroelastomer containing cyano groups, silane coupling agent, crosslinking agent and inorganic filler

摘要

A fluoroelastomer composition comprises a fluoroelastomer containing cyano groups, a silane coupling agent, a cross-linking agent and an inorganic filler. a fluoro-elastomer composition (I) comprises: (A) a fluoroelastomer consisting of tetrafluoroethylene units, perfluoro(alkyl vinylether) units and cyano group containing perfluoro vinylether units, where the perfluoro(alkyl vinylether) contains a 1-5C alkyl group; (B) a silane coupling agent of formula (1) or (2); (C) a cross-linking agent; and (D) an inorganic filler. Si(R)(R)(R)-A (1) Si(R)(R)(R)-R1-B-Rf (2) R = 1-5C alkoxy or alkyl, optionally containing an ether linkage, where at least 2 R groups are alkoxy; A = 1-10C alkyl containing amine, mercapto, ethoxy , vinyl, methacryloxy or halogen; R1 = 1-10C alkylene, optionally containing a sulfide, ether, carbonyl or sulfonyl bonded N atom; B = -C(O)O-, -C(O)S-, -C(O)NH- or -S(O)2-NH- or a carbon-carbon bond; Rf = 1-10C perfluoroalkyl