Patent ID: 8846773
Filing Date: 2014-09-30
Classification: B01J,C02F,C08F

Abstract:
1. A method for manufacturing a cation exchange resin, the method comprising: (1) copolymerizing a monovinyl aromatic monomer and a cross-linkable aromatic monomer, then crosslinking, to obtain a cross-linked copolymer; (2) specifying a content of a leachable compound or oligomer represented by formula (I) to be 400 μg or less relative to 1 g of the cross-linked copolymer, wherein: Z represents a hydrogen atom or an alkyl group; l represents a natural number; and the specifying comprises at least two steps selected from the group consisting of (3) sulfonating the cross-linked copolymer to form a sulfonylated cross-linked copolymer.