Patent ID: 7615599

Claim:
A noncrosslinked, covalently crosslinked and/or ionically crosslinked polymer effective for use in membrane processes, the polymer having repeating units of the general formula (1) —K—R— (1) in which K is a bond, oxygen, sulphur, the radical R is a divalent radical of an aromatic or heteroaromatic compound, wherein a) the radical R has at least in part substituents of the general formula (4I), (4J), (4K), (4L), (4M), (4N), (4O), (4P), (4Q), or (4R), where the radicals R 1 independently of one another are a bond or a group having 1 to 40 carbon atoms, or an alkylated aryl group, M is hydrogen, a metal cation, or an alkylated ammonium ion, and X is a halogen or an alkylated amino group, wherein b) the radical R at least in part substituents of the general formula (5E) and/or (5F) in which R 2 , R 3 , R 4 and R 5 independently of one another are hydrogen, a group having from 1 to 40 carbon atoms, or an alkylated aryl group, it being possible for at least two of the radicals R 2 , R 3 and R 4 to be closed to form an aromatic ring, and/or the radical R is at least in part a group of the general formula (5C) and/or (5D)