Patent ID: 7202319

Claim:
Water-soluble copolymers based on olefinic sulfonic acids, characterized in that they contain a) 5 to 93 wt.-% structural units of formula (Ia) and/or (Ib) in which R 1 =hydrogen or C 1 –C 5 alkyl, R 2 =C 1 –C 20 alkylene, carboxy-C 1 –C 20 -alkylene, carboamido-C 1 –C 20 -alkylene or phenylene M=hydrogen, ammonium or a monovalent, divalent or trivalent metal cation and x=1 to 3 b) 1 to 50 wt.-% structural units of formula (IIa) and/or (IIb) in which R 3 and R 4 =—COO − (M x+ ) 1/x or are together R 5 =—COO − (M x+ ) 1/x , M=hydrogen, ammonium or a monovalent, divalent or trivalent metal cation and x=1 to 3 c) 5 to 93 wt-% structural units of formula (III) in which R 6 =hydrogen or C 1 –C 5 alkyl R 7 and R 8 =hydrogen or C 1 –C 10 alkyl or are together —(CH 2 ) y —, and y=3 to 7 d) 1 to 25 wt.-% structural units of formula (IVa) and/or (IVb) and/or (IVc) in which R 9 hydrogen or C 1 –C 5 alkyl R 10 =C 1 –C 10 alkyl, C 1 –C 10 aminoalkyl, C 1 –C 20 hydroxyalkyl, C 1 –C 4 alkyl or hydroxyl-terminated mono- or poly-C 2 –C 3 -alkyleneoxy (containing 1 to 400 alkyleneoxy units), C 7 –C 20 alkylaryl, C 7 –C 20 hydroxyalkylaryl, C 6 –C 10 aryl, C 6 –C 10 hydroxyaryl R 11 , R 12 and R 13 =hydrogen or C 1 –C 5 alkyl, and R 14 =hydrogen, C 1 –C 20 alkyl, C 1 –C 10 aminoalkyl, C 1 –C 20 hydroxyalkyl, C 1 –C 4 alkyl or hydroxyl-terminated mono- or poly-C 2 –C 3 -alkyleneoxy (containing 1 to 400 alkyleneoxy units), C 7 –C 20 alkylaryl, C 7 –C 20 hydroxyalkylaryl, C 6 –C 10 aryl, C 6 –C 10 hydroxyaryl or C 1 –C 20 alkylenesulfonic acids optionally substituted with hydroxyl group(s) and ammonium, alkali or alkaline earth salts thereof R 16 =H, CH 3 X=O, NH n=1 to 6 r, s=0 to 5 t=1 or 2 u=1 to 50 and R 6 has the above-mentioned meaning and that the components a) to d) add up to 100 wt.-%.