Bromosulphonated fluorinated cross-linkabke elastomers based on vinylidene fluoride having low t9 and processes for their preparation
申请人:——
公开号:US20030181615A1
公开(公告)日:2003-09-25
Compounds corresponding to formula (I)
F
2
C═CFX(CY
2
)
n
Br (I)
in which:
X represents an atom of oxygen or no atom;
Y represents an atom of hydrogen or of fluorine; and
n is a whole natural number ranging from 0 to 10 inclusive,
excluding bromotrifluoroethylene, 3-bromo-perfluoropropene, 4-bromo-1,1,2,-trifluorobutene, 4-bromo-perfluorobutene-1 and perfluoro(2-bromo-ethylvinyl ester), and their use in the synthesis of fluorinated copolymers then in the synthesis of homosulphonated fluorinated elastomers, exhibiting a low glass transition temperature.
化合物对应于公式(I)F2C═CFX(CY2)nBr (I)其中:X表示氧原子或无原子;Y表示氢原子或氟原子;n是0至10的自然数,不包括三氟溴乙烯、3-溴全氟丙烯、4-溴-1,1,2-三氟丁烯、4-溴全氟丁烯-1和全氟(2-溴乙烯基酯),以及它们在合成氟共聚物时的使用,然后在合成具有低玻璃转移温度的氟弹性体时使用。