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.
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 19F-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 19F-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.
MORIKAWA TATSUYA
OGATA SHINTARO
NISHIBAYASHI HIROFUMI
YAMASOTO TAKAFUMI
NOGUCHI TAKESHI
KISHINE MITSURU
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