发明授权
US5902868A Fluorine-containing copolymer elastomer, process for producing the same and composition containing the same 失效
含氟共聚物弹性体,其制造方法和含有它的组合物

Fluorine-containing copolymer elastomer, process for producing the same
and composition containing the same
摘要:
A novel fluorine-containing copolymer elastomer having bromine groups as cross-linkable groups, which comprises about 45 to about 80% by mole of tetrafluoroethylene, about 50 to about 20% by mole of a perfluoro(vinylether) represented by following general formula:CF.sub.2 .dbd.CFO(CF.sub.2).sub.2 (OCF.sub.2)nOCF.sub.3where n is an integer of 1 to 5, and about 0.2 to about 5% by mole of a bromine-containing unsaturated monomer compound, sum total being 100% by mole, gives vulcanization products having distinguished resistances to chemicals, low temperature and heat.
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