Patent ID: 7635672

Claim:
A liquid cleaning composition comprising: (a) a hydrophilizing polymer comprising a water soluble or water dispersible copolymer comprising a reaction product of: (I) at least one monomer having the following structure (I): wherein R 1 and R 4 independently represent a hydrogen atom or a linear or branched C 1 -C 6 alkyl group: R 2 and R 3 independently represent an alkyl, hydroxyalkyl or amino alkyl group in which the alkyl group is a linear or branched C 1 -C 6 chain; n and m independently represent integers between 1 and 3; X − represents a counterion; and (II) at least one hydrophilic monomer having an acidic function which is copolymerizable with (a) and capable of ionizing in the medium of use; and wherein the molar ratio of monomers (a)/(b) is from about 60/40 to about 5/95. (b) a surfactant, (c) an acid, selected from the group consisting of citric acid, lactic acid, maleic acid, malic acid, glycolic acid, succinic acid, glutaric acid, adipic acid, sulphuric acid, sulfamic acid, chlorohydric acid, phosphoric acid, nitric acid, and mixtures thereof and (d) a solvent comprising propylene glycol N-butyl ether.