141256-21-5 155421-05-9 177529-56-5 193098-76-9 26655-00-5 50923-04-1 65216-30-0 78690-67-2 97709-05-2 99551-00-5 Propane, 1,1,1,2,2,3,3-heptafluoro-3-((trifluoroethenyl)oxy)-, polymer with tetrafluoroethene