Patent ID: 9475899
Filing Date: 2016-10-25
CPC Classification: C08F,H01M,Y02E,Y02P

Claim Text:
1. A process for heat treating a composition (C) which contains at least one polymer (F), wherein polymer (F) is a melt-processible perfluoropolymer formed of tetrafluoroethylene (TFE) copolymer with one or more perfluorinated comonomer (F) containing at least one unsaturation of ethylene type in amounts from 0.5% to 13% by weight; the process comprising heat-treating composition (C) at a temperature of at least 260° C. and in the absence of a melt flowable polytetrafluoroethylene (PTFE): for at least 24 hours, and/or wherein the maximum temperature of heat-treating composition (C) is: