Patent ID: 7732548

Claim:
A composition that is an aqueous building material system, a water-based paint or coating system comprising a sufficient amount of a bipolymer or terpolymer to provide a stabilizing effect, wherein the bipolymer or terpolymer is water-soluble, contains sulfo groups and has a number average molecular weight of from 50,000 to 20,000,000 g/mol and consists of: a) from 3 to 96 mol % of a structural group of formula I wherein R 1 is hydrogen or methyl, R 2 , R 3 , R 4 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 from 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)—(CH 2 ) x — or —CO—NR 2 —(CH 2 ) x —, x is from 1 to 6, R 5 and R 6 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 R 1 and R 2 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 NR 5 , V is —(CH 2 ) x —, R 7 is R 5 or R 6 , —(CH 2 ) x —SO 3 ⊖ M a , X is halogen, C 1 -C 4 -alkylsulfate of C 1 -C 4 -alkylsulfonate, and R 1 , R 5 , R 6 , M, a and x are as defined above.