70815-05-3 Ethanesulfinic acid, 2-(1-(difluoro((trifluoroethenyl)oxy)methyl)-1,2,2,2-tetrafluoroethoxy)-1,1,2,2-tetrafluoro-, polymer with tetrafluoroethene Tetrafluoro-2-(trifluoro-1-(trifluoromethyl)-2-((trifluorovinyl)oxy)ethoxy)ethanesulfinic acid, tetrafluoroethylene polymer