Patent ID: 9321047
Filing Date: 2016-04-26
CPC Classification: B01D,B01J,C08F,C08J,Y02A

Claim Text:
1. An anion exchange membrane, comprising, as main elements: a mixture of a block copolymer (P), and a nonionic vinyl alcohol homopolymer or nonionic vinyl alcohol copolymer (Q), wherein the block copolymer (P) comprises a vinyl alcohol polymer block (A) and a cationic-group comprising polymer block (B) as components, and wherein the polymer block (B) comprises a repeating unit of formula (3): wherein R R X wherein said nonionic vinyl alcohol homopolymer or nonionic vinyl alcohol copolymer (Q) has a polymerization degree of 200 to 8000 and a saponification degree of 80 mol % or more, wherein a mass ratio (P/Q) of said block copolymer (P) to said nonionic vinyl alcohol homopolymer or nonionic vinyl alcohol copolymer (Q) is 3/97 or more, and wherein the anion exchange membrane is crosslinked, and wherein said membrane is formed by: heating a film obtained from a solution comprising said block copolymer (P) and said nonionic vinyl alcohol homopolymer or nonionic vinyl alcohol copolymer (Q); and crosslinking the film.