An elastic fluorocopolymer comprises repeating units (1) based on a fluoromonomer such as tetrafluoroethylene, hexafluoropropylene, vinylidene fluoride or CF2=CF-O-Rf (wherein Rf is a C1-8 saturated perfluoroalkyl group or a perfluoro(alkoxyalkyl) group) and repeating units (m) based on the formula CR1R2=CR3COOCH=CH2 (wherein each of R1 and R2 is a hydrogen atom, a C1-10 alkyl group or a C1-10 alkoxyalkyl group containing an etheric oxygen atom, and R3 is a hydrogen atom, a fluorine atom or a methyl group) in a molar ratio of (m)/((l) =0.0001 to 0.1. Further, an elastic fluorocopolymer composition comprises (A) the above elastic fluorocopolymer, (B) an unsaturated multifunctional compound and (C) a bivalent metal oxide and/or hydroxide. The elastic fluorocopolymer and the elastic fluorocopolymer composition are excellent in the crosslinkability and can provide a crosslinked rubber thereof excellent in crosslinked rubber properties.
一种弹性含
氟聚合物包括基于
氟单体如
四氟乙烯、
六氟丙烯、
偏氟乙烯或
CF2=CF-O-Rf(其中Rf为C1-8饱和
全氟烷基或
全氟(烷氧基)烷基)的重复单元(1)和基于式CR1R2=CR3COOCH=
CH2(其中R1和R2各自为氢原子、C1-10烷基或含醚氧原子的C1-10烷氧基烷基,R3为氢原子、
氟原子或甲基)的重复单元(m)、C1-10烷基或含醚氧原子的C1-10烷氧基烷基,R3为氢原子、
氟原子或甲基),摩尔比为(m)/((l)=0.0001至0.1。进一步地,一种弹性含
氟聚合物组合物包括 (A) 上述弹性含
氟聚合物、(B) 不饱和多功能化合物和 (C) 二价金属氧化物和/或氢氧化物。弹性含
氟聚合物和弹性含
氟聚合物组合物具有优异的交联性,可提供交联橡胶性能优异的交联橡胶。