| abstract |
The present invention relates to the the use of water-soluble copolymers based on acrylamidoalkylenesulfonic acid, vinylacetamide and, if appropriate, other monomers, comprising 5-90% by weight of structural units of the formula <IMAGE> (I) in which R1 is hydrogen or methyl, R2 is C2-C10-alkylene, preferably C2-C6-alkylene, particularly preferably C4-alkylene, and Me is ammonium or an alkali metal ion, 5-95% by weight of structural units of the formula <IMAGE> (II) in which R3 and R4 independently of one another are hydrogen, methyl or ethyl, or R3 and R4 together are a propylene group which, including a radical <IMAGE> form a pyrrolidone radical, 0-90% by weight of structural units of the formula <IMAGE> (III) in which X is a halogen, preferably chloride, R5 and R6 independently of one another are C1-C6-alkyl, prefrably C1-C3-alkyl, in particular methyl or ethyl, and 0-90% by weight of structural units of the formula -CHR7-CHR8-in which R7 is hydrogen or methyl and R8 is CONH2, CON(CH3)2, cyano, SO3H, SO3Me, C6H4SO3H, C6H4SO3Me, CH2SO3H, CH2SO3Mr, COOH, COOMe or an ester group COOR, in which R is C1-C15-alkyl, preferably C1-C8-alkyl, as a detergent additive for preventing reabsorption of detached dyestuffs and dyestuff degradation products. |