Cation exchange membrane

摘要

A cation exchange membrane prepared from a blend of two different fluorinated polymers, each containing cation exchange groups selected from carboxylic acid groups, sulfonamide groups, N-monosubstituted sulfonamide groups and sulfonic acid groups, having different exchange capacities with a difference of at least 200 therebetween in terms of equivalent weight. This membrane has been found to be useful in the electrolysis of an aqueous alkali metal halide solution and can give improved results in such an electrolysis.