Patent ID: 6066707
Filing Date: 2000-05-23
Classification: C08F

Abstract:
Tetrafluoroethylene (TFE) thermoprocessable copolymers, consisting of:(A) from 0.1 to 15% by moles of a fluorodioxol of formula ##STR14## wherein R.sub.F is a perfluoroalkyl having from 1 to 5 carbon atoms; X.sub.1 and X.sub.2, equal to or different from each other, are --F or --CF.sub.3 ; 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 CF.sub.2 .dbd.CF--OR'.sub.f wherein R'.sub.f is a perfluoroalkyl C.sub.2 -C.sub.4 or their mixtures; 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, and excluding the value 0 for the amount of the monomer (B).