Patent ID: 7993792
Filing Date: 2011-08-09
Classification: C08G,H01M,Y02E

Abstract:
1. A block copolymer having formula 1a or formula 1b: wherein A is a first polymer segment that is repeated m times to form first polymer block A B is a second polymer segment that is repeated n times to form second polymer block B C is a third polymer segment that is repeated s times to form third polymer block C at least one of A, B, and C is described by formula 2 Y R R m, n, and s are each independently an integer from 1 to 200; p is an integer from 1 to 20; i is an integer from 1 to 6; T Y R R M is a metal, ammonium, or alkylammonium; and j is an integer from 0 to 30; with the proviso that when j>1, the Y 2 between sequential aromatic rings are the same or different; the R 5 , R 6 , R 7 , R 8 , and R 9 on sequential aromatic rings are the same or different; and at least one of R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , and R 13 is —SO 3 H, —SO 3 − M + , —COOH, —COO − M + , —PO 3 H 2 , —PO 3 H − M + , —PO 3 2− M 2 + , or —PO 3 2− M 2+ , wherein at least one of A, B, or C comprises a component selected from the group consisting of polymer segments having formulae 8, 9, 10, and 11, and salts thereof: