WEAKLY ACIDIC CATION EXCHANGE RESINS AND PROCESS FOR PRODUCING SAME

摘要

Weakly acidic cation exchange resins obtained by rereacting glyoxylic acid and a polyvinyl alcohol cross-linked by cross-linking groups each containing two or more carbon atoms, and having an exchange capacity of 3 meq/g or more and a swelling volume of 10 ml/g or less, as well as a process for producing such cation exchange resins are described.