| 摘要 |
PURPOSE:To obtain the titled composition having excellent vulcanization properties, etc., and giving a vulcanized product having small compession set and high heat-resistance, etc., by compounding a specific fluoroelastomer copolymer with an iminium salt-type vulcanization accelerator, a polyol-type crosslinking agent, a sulfone-type vulcanization accelerating assistant, etc. CONSTITUTION:The objective composition is produced by compounding (A) 100pts.(wt.) of an elastomer composition containing vinylidene fluoride unit and one or more other fluorine-containing monomer units with (B) 0.05-2pts. of an iminium salt-type is vulcanization accelerator of formula I (X<-> is halogen ion, etc.), (C) 0.1-10pts. of a polyol-type crosslinking agent (e.g. bisphenol AF), (D) 0.05-10pts. of the compound of formula II (R<1> and R<2> are 1-20C alkyl, etc., which may be substituted with a neutral group, and (E) 0.5-30pts. of a bivalent metal oxide and/or bivalent metal hydroxide.
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