Acrylic rubber composition

摘要

An active halogen-containing acrylic rubber composition for molding oil filter-gaskets, which comprises an active halogen-containing acrylic rubber and a metal phosphonate represented by the following general formula: RR'nPO(OH)(OM) wherein R is an alkyl group having 1 to 32 carbon atoms, a polyfluorocarbon group or a perfluoropolyether group; R' is an alkylene group having 1 to 6 carbon atoms, a phenylene group, an oxyphenylene group or a sulfonamide group; M is an alkali metal; and n is 0 or 1, gives oil filter-gaskets having a distinguished durable protection against fixation without lowering of high temperature sealability, even if used in engine oil.