HEXAFLUOROPROPENE-BASED FLUOROSULFONATED ELASTOMERS WITH A LOW GLASS TRANSITION TEMPERATURE, CONTAINING NEITHER TETRAFLUOROETHYLENE NOR A SILOXANE GROUP
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United States of America Patent
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app pub date -
Apr 18, 2012
filing date -
Dec 29, 1999
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Abstract
The present invention describes the synthesis of new fluorinated elastomers with very low glass transition temperatures (Tg), a good resistance to bases, gasoline and other carburants and good workability properties, these elastomers contain hexafluoropropene (HFP), perfluoro(4-methyl-3,6-dioxaoct-7-ene) sulfonyl fluoride (PFSO2F), vinylidene fluoride (VDF) and/or at least one fluorinated alkene and/or one vinyl perfluorinated ether. In a precise case, they are prepared by radical polymerisation of HFP and PFSO2F or by radical terpolymerisation HFP, PFSO2F and VDF in the presence of different organic initiator, such as peroxides, peresters or diazo compounds.
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