Patent ID: 8710176
Filing Date: 2014-04-29
Classification: C08J,H01B,H01M,Y02E,Y02P

Abstract:
1. A method for producing a sulfonated polyarylether block copolymer, said copolymer comprising a hydrophobic segment having a structural unit represented by formula (5) and a hydrophilic segment having a structural unit with sulfonic acid groups or derivative thereof incorporated into a structure represented by formula (6), wherein, D Ar wherein, D Ar the method comprising block copolymerizing a hydrophilic segment prepolymer represented by formula (18) and a hydrophobic segment prepolymer, the block copolymerization being conducted through ether exchange reaction, wherein D Ar a is an integer of from 20 to 1,000; p and q are independently an integer of 0, 1 or 2; and p+q≧1, wherein the hydrophilic segment prepolymer is prepared from a 3,3′-disulfo-4,4′-dichlorodiphenylsulfonate, and wherein the sulfonated polyarylether block copolymer has an ion-exchange capacity of 0.5 mmol/g to 3.0 mmol/g.