Water-soluble sulfonic group-containing copolymers and terpolymers the production thereof and water-based painting and coating systems

A water-soluble copolymer or terpolymer which contains sulfo groups and has a number average molecular weight of from 50,000 to 20,000,000 g/mol and comprises:

• a) from 3 to 96 mol % of a structural group of formula I
• wherein R1 is hydrogen or methyl,
• R2, R3, R4 is hydrogen, an aliphatic hydrocarbon residue having from 1 to 6 carbon atoms, or a phenyl residue which may be unsubstituted or substituted by methyl groups,
• V is NH or oxygen,
• M is hydrogen, a monovalent or divalent metal cation, ammonium or an organic amine residue,
• N is 1 to 5,
• A is ½ or 1,
• b) from 3 to 96 mol % of a structural group of formula II
• wherein W is —CO(O)—(CH2)x— or —CO—NR2—(CH2)x—,
• x is from 1 to 6,
• R5 and R6 are independently hydrogen, a substituted or unsubstituted aliphatic hydrocarbon residue having from 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon residue having from 5 to 8 carbon atoms, or an aryl residue having from 6 to 14 carbon atoms, and
• R1 and R2 are as defined above,
• and/or
• c) from 0.05 to 75 mol % of a structural group of formula III
• wherein Y is O, NH or NR5,
• V is —(CH2)x—,
• R7 is R5 or R6, —(CH3)xSO3⊖Ma,
• X is halogen, C1-C4-alkylsulfate or C1-C4-alkylsulfonate,
• and R1, R5, R6, M, a and x are as defined above.