US Patent 7101943 Peroxide-curable fluoroelastomers

Fluoroelastomers, curable by peroxidic route, obtainable by polymerizing the following monomers:a) C2–C8 hydrogenated fluoroolefins;b) fluorovinylethers of general formula:CFX═CXOCF2OR   (I)c) bis-olefins having general formula:RI1RI2C═CRI3—Z—CRI4═CRI5RI6   (IA)and optionally:d) one or more fluorinated olefinic comonomers selected from perfluoroalkylvinylethers (PAVE) CF2═CFOR2f, perfluorooxyalkylvinylethers CF2═CFOXa,e) C2–C8 perfluorolefins;f) one or more C2–C8 non fluorinated olefinic comonomers said fluoroelastomers comprising iodine and/or bromine atoms in the chain and/or in end position.