METAL-NEUTRALIZED SULFONATED BLOCK COPOLYMERS, PROCESS FOR PREPARING THEM AND THEIR USE

摘要

PROBLEM TO BE SOLVED: To provide: a process for neutralizing a sulfonated block copolymer with a metal compound; metal-neutralized block copolymers; and various articles comprising the metal-neutralized block copolymers in the form of a water vapor permeable membrane which comprises the metal-neutralized block copolymers.SOLUTION: A process for obtaining a neutralized sulfonated block copolymer comprises: obtaining a solution prepared by dissolving a non-neutralized sulfonated block copolymer in an organic solvent, forming micelles of a non-neutralized sulfonated block copolymer, and immuring a polar component in the micelles; and adding at least one metal compound to the solution.