The present invention relates to the use and application of a water-soluble or water-dispersible copolymer comprising:a) at least a monomer compound of general formula i:in which R1 is a hydrogen atom, a methyl or ethyl group R2, R3, R4, R5 and R6, which are identical or different, are linear or branched C1-C6, alkyl, hydroxyalkyl or aminoalkyl groups m is an integer from 0 to 10 n is an integer from 1 to 6 Z represents a —C(O)O— or —C(O)NH— group or an oxygen atom A represents a (CH2)p group, p being an integer from 1 to 6 B represents a linear or branched C2-C12, polymethylene chain optionally interrupted by one or more heteroatoms or heterogroups, and optionally substituted by one or more hydroxyl or amino groups X, which are identical or different, represent counterions and (b) at least one hydrophilic monomer carrying a functional acidic group which is copolymerizable with (a) and which is capable of being ionized in the application medium (c) optionally at least one monomer compound with ethylenic unsaturation with a neutral charge which is copolymerizable with (a) and (b), preferably a hydrophilic monomer compound with ethylenic unsaturation with a neutral charge, carrying one or more hydrophilic groups, which is copolymerizable with (a) and (b).Said polymer is a particularly good agglomerating agent and can preferentially be used in cleaning operations.
