Novel fluorine-containing non-crystalline copolymer.

摘要

a fluorine-containing non-crystalline copolymer comprising 10 to 90 % by mole of repeating units derived from tetrafluoroethylene and 90 to 10 % by mole of repeating units derived from a fluorovinyl ether of the formula: CH2=CHOCH2(CF2)nX (I) wherein X is a halogen atom or a hydrogen atom and n is a number of 2 to 8, and a copolymer comprising repeating units derived from tetrafluoroethylene, the fluorovinyl ether (I) and a third monomer selected from the group consisting of vinylidene fluoride and ethylene in which the content of repeating units derived from the third monomer is from 1 to 80 % by mole in case of vinylidene fluoride or from 10 to 60 % by mole in case of ethylene, and the reminder consists of the repeating unites derived from tetrafluoroethylene and the fluorovinyl ether (I) in a molar ratio of 1:9 to 9:1, which have good low temperature properties as well as resistance to heat, oil and chemicals.