| abstract |
Perfluoroelastomers, curable by peroxidic route, obtainable by polymerizing the following monomers: n a) tetrafluoroethylene (TFE); n b) fluorovinylethers of general formula: n CFX═CXOCF 2 OR (I) n c) bis-olefins having general formula: n R I 1 R I 2 C═CR I 3 —Z—CR I 4 ═CR I 5 R I 6 (IA) n d) optionally, one or more fluorinated olefinic comonomers selected from C 2 -C 8 perfluoroolefins, perfluoroalkylvinylethers (PAVE) CF 2 ═CFOR 2 f , perfluoro-oxyalkylvinylethers CF 2 ═CFOX a , n said perfluoroelastomers comprising iodine and/or bromine atoms in the chain and/or in end position, said halogen atoms deriving from “cure site” comonomers and/or from chain transfer agents used in polymerization. |