Fluorine-containing copolymer used as thermoplastic material, e.g. for tubing, sealing material, films or foils

摘要

Fluorine-containing copolymer comprises: (a) 0.05-20 mol.%polymer units based on a fluorinated comonomer selected from XRfCY=CH2 (1), XRfOCF=CF2 (2) and CF3(CF2)n(OCF(CF3)CF2)mOCF=CF2 (3) (where Y = F or H; Rf = divalent 2-12C fluorinated organic group; X = F, Cl, or H; n = 0-3; and m = 1-4); (b) 30-85 mol.% polymer units based on tetrafluoroethylene; (c) 1-30 mol.% polymer units based on propylene; and (d) 5-68.5 mol.% polymer units based on vinylidene fluoride.