| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorine-containing elastomeric material excellent in processability and crosslinkability while keeping mechanical properties and thermal resistance, and to provide a composition for crosslinking. SOLUTION: The fluorine-containing elastomeric copolymer is obtained by copolymerizing (A) a fluorine-containing vinyl ether monomer mixture which is a mixture of a fluorine-containing vinyl ether monomer (Ia) expressed by formula (I) (wherein Rf is a perfluoroalkylidene group or a perfluorooxyalkylidene group; X is a CN group, COOH group or COOR group) and having a peak at -143 to -145 ppm in<SP>19</SP>F-NMR, and a fluorine-containing vinyl ether monomer (Ib) being a structural isomer of the monomer (Ia) and having a peak at -141 to -142 ppm in<SP>19</SP>F-NMR, where the mixing ratio (Ib)/(Ia) in terms of the peak intensity at -141 to -142 ppm/the peak intensity at -143 to -145 ppm of≥0.02, (B) a fluorine-containing vinyl monomer excluding the fluorine-containing vinyl ether monomers (Ia) and (Ib), and optionally (C) a non-fluorine-based monomer. COPYRIGHT: (C)2003,JPO
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