Patent ID: 7595373

Claim:
A sulfonated block copolymer comprising sulfonated polyaryletherketone blocks comprising structural units of formula polyethersulfone blocks comprising structural units of formula wherein R 1 , R 2 , R 3 and R 4 are independently C 1 -C 10 alkyl, C 3 -C 12 cycloalkyl, C 6 -C14 aryl, allyl, alkenyl, alkoxy, halo, or cyano; Z and Z 1 are independently a direct bond or O, S, (CH2) r ; (CF2) r , C(CH 3 ) 2 , C(CF 3 ) 2 , or a combination thereof; M is H, a metal cation, a non-metallic inorganic cation, an organic cation or a mixture thereof a is 0 or an integer from 1 to 3; b, c and d are independently 0 or an integer from 1 to 4; m and n are independently 0 or 1; and r is an integer from 1 to 5.