| abstract |
A crosslinkable fluororubber composition comprising (A) a perfluoro compound having at least two alkenyl groups and a divalent perfluoroalkylene or perfluoropolyether structure in the backbone or a polymer obtained by adding a compound having at least two hydrosilyl groups in the molecule to some alkenyl groups on the perfluoro compound, (B) a reinforcing filler, (C) a addition reaction crosslinking agent having a hydrosilyl group or a peroxide crosslinking agent, and(D) a surface treating agent having at least one fluoroalkyl or fluoropolyalkyl ether group and silanol groups is improved in heat resistance in the cured state by adding thereto (E) a heat resistance modifier selected from carbon black, metal oxides and metal hydroxides. |