Patent ID: 7410939

Claim:
A cleaner composition comprising A) at least one surfactant, B) at least one builder and C) at least one nitrogen-containing polymer with repeat units of the formula III, wherein R 2 is a chemical bond or C 1 -C 20 -alkanediyl which is optionally interrupted by a double bond and/or an imino group and/or is optionally, completely or partially, a constituent of one or more saturated or unsaturated carbocyclic 5- to 8-membered rings, where the alkanediyl may carry one or more hydroxyl groups and/or amino groups, R 3 is C 2 -C 8 -alkanediyl or is —CH 2 —CHR 4 O—CH 2 —CHR 4 q X is O, NH or C 1 -C 6 -alkylamino, Z 3 is C 1 -C 6 -alkyl, phenyl or phenyl-C 1 -C 4 -alkyl, if k=0, together with N—R 3 —X can form a 5- to 7-membered saturated heterocyclic ring having 2 nitrogen atoms or, if k=1, the two radicals Z 3 can together with N—CH 2 —CH 2 —N form a 5- to 7-membered saturated heterocyclic ring having 2 nitrogen atoms, R 4 is hydrogen or C 1 -C 10 -alkyl, q is a number from 1 to 20, k is 0 or 1; or reaction products thereof with neutralizing agents or quaternizing agents.