Tetrafluoroethylene thermoprocessable copolymers

摘要

Tetrafluoroethylene (TFE) thermoprocessable copolymers, consisting of: (A) from 0.1 to 15% by moles of a fluorodioxol of formula wherein RF is a perfluoroalkyl having from 1 to 5 carbon atoms; X1 and X2, equal to or different from each other, are -F or -CF3; Z is selected from -F, -H and -Cl; (B) from 0 to 15% by moles of a perfluorinated monomer selected from hexafluoropropene (HFP) and a perfluoralkylvinylether of formula CF2=CF-OR'f wherein R'f is a perfluoroalkyl C2-C4 or their mixtures; excluding the value 0 for the amount of the monomer (B); and (C) TFE forming the remaining part to 100%; with the proviso that the total amount of the monomers (A) and (B) is lower than or equal to 20% by mole.