Patent ID: 6300446
Filing Date: 2001-10-09
Classification: C08F,C08L

Abstract:
A fluorine-containing copolymer, which comprises:from 30 to 70 mol % of polymer units based on (A) tetrafluoroethylene;from 0.1 to 40 mol % of polymer units based on (B) of at least one member selected from the group consisting of vinyl fluoride and chloride; andfrom 20 to 69.9 mol % of polymer units based on (C) a polymerizable compound selected from the group consisting of a fluorine-containing olefin, an alkyl vinyl ether, a hydrocarbon olefin and a fluorine-containing vinyl ether selected from the group consisting of a perfluorovinyl ether having the formula:CF.sub.2.dbd.CFO(CF.sub.2 CFXO).sub.n R.sup.f,wherein R.sup.f is a C.sub.1-12 perfluoroalkyl group, X is a fluorine atom or a trifluoromethyl group and n is 0 or an integer of 1 to 6, a non-perfluorinated vinyl ether having the formula:CF.sub.2.dbd.CFO(CF.sub.2).sub.p H,wherein p is an integer ranging from 2 to 8 and a fluorinated vinyl ether of the formula:CF.sub.2.dbd.CFOCH.sub.2 (CF.sub.2).sub.q F,wherein q is an integer ranging from 1 to 7, said copolymer having a Mooney viscosity ML.sub.1+10 (100.degree. C.) ranging from 10 to 200 as an index of molecular weight of the copolymer.