| abstract |
Perfluoroelastomers, curable by peroxidic route, obtainable by polymerizing the following monomers: a) tetrafluoroethylene (TFE); b) fluorovinylethers of general formula: CFX=CXOCF2OR c) bis-olefins having general formula: R<I> 1R<I> 2 C=CR<I> 3-Z-CR<I> 4=CR<I> 5R<I> 6 d) optionally, one or more fluorinated olefinic comonomers selected from C2-C8 perfluoroolefins, perfluoroalkylvinylethers (PAVE) CF2=CFOR<2>f, perfluoro-oxyalkylvinylethers CF2=CFOX<a>, 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. |