103735-87-1 103735-88-2 11111-61-8 127536-81-6 138361-71-4 159551-40-3 25684-76-8 37360-96-6 39429-57-7 52683-03-1 53988-89-9 56258-05-0 56573-01-4 57459-93-5 58449-59-5 92768-97-3 Ethene, tetrafluoro-, polymer with 1,1-difluoroethene