| abstract |
Perfluoroelastomers, curable by peroxidic route, obtainable bynpolymerizing the following monomers:n a) tetrafluoroethylene (TFE); b) fluorovinylethers of general formula:n CFX=CXOCF 2 OR 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 d) optionally, one or more fluorinated olefinic comonomersnselected from C 2 -C 8 perfluoroolefins, perfluoroalkylvinylethersn(PAVE) CF 2 =CFOR 2 f , perfluoro-oxyalkylvinylethersnCF 2 =CFOX a , nsaid perfluoroelastomers comprising iodine and/or brominenatoms in the chain and/or in end position, said halogen atomsnderiving from "cure site" comonomers and/or from chainntransfer agents used in polymerization. |