CATGION EXCHANGE POLYMERS,MEMBRANES THEREOF,THEIR PRODUCTION AND THEIR USE

摘要

Fluorinated cation exchange polymers are obtained from intermediate fluorinated polymers containing pendant sulfonyl halide groups which are reacted with a di- or polyamine and subjected to elevated temperature of the order of 170 DEG to 300 DEG C. The polymers are desirably employed with pendant side groups in the salt form. The polymers possess perm-selectivity giving desirable performance in electrolytic cells such as chlor-alkali cells as well as membrane ion exchanger and reverse osmosis devices.