Melt-processible perfluoropolymer having improved thermal and mechanical properties after heat treatment

摘要

The present invention, tetrafluoroethylene (TFE) copolymer and 0.5 wt% to 13 wt%, preferably from 0.6 wt% to 11 wt% and more preferably from 0.8 wt% to 9 wt% containing at least one ethylenically of one or more perfluorinated comonomer [comonomer (F)] because formed at least one melt-processible perfluoropolymer containing an unsaturated [polymer (F)] in an amount composition a method for heat-treating the composition (C)], a step of heat treatment in the absence of temperature and melt flowable polytetrafluoroethylene least 260 the composition (C) It relates to a method including at least. The present invention, tetrafluoroethylene (TFE) copolymer and 0.5 wt% to 13 wt%, at least preferably in an amount of 0.6 wt% to 11 wt% and more preferably from 0.8 wt% to 9 wt% a single ethylenically of one or more perfluorinated comonomer [comonomer (F)] and are formed from a melt-processible perfluoropolymer containing an unsaturated polymer (F1)], the comonomers (F) further relates to melt-processible perfluoropolymer [polymer (F1)] the specific relationship is satisfied between the content and the first melting point of the polymer (F1).BACKGROUND