A copolymer for an fluorine-containing elastomer having excellent low temperature resistance and alcohol resistance comprises vinylidene fluoride units and fluorovinyl ether units having the formula CF2=CFOX (X represents a C3 - C9 perfluoroalkyl group which has ether bond having 1 - 3 oxygen atom) at a molar ratio of vinylidene fluoride units to fluorovinyl ether units of 95 : 5 to 50 : 50 and at a total content of the units of at least 80 mole %..
一种用于含
氟弹性体的共聚物,具有优异的耐低温性和耐
酒精性,由
偏氟乙烯基单元和
氟乙烯基醚单元组成,其式为
CF2=CFOX (X 代表 C3 - C9
全氟烷基,其醚键具有 1 - 3 个氧原子),
偏氟乙烯基单元与
氟乙烯基醚单元的摩尔比为 95 : 5 至 50 : 50,单元总含量至少为 80 摩尔 %。