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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 ##STR1## in which R.sup.1 is hydrogen or methyl, R.sup.2 is C.sub.2 -C.sub.10 -alkylene, preferably C.sub.2 -C.sub.6 -alkylene, particularly preferably C.sub.4 -alkylene, and Me is ammonium or an alkali metal ion, 5-95% by weight of structural units of the formula ##STR2## in which R.sup.3 and R.sup.4 independently of one another are hydrogen, methyl or ethyl, or R.sup.3 and R.sup.4 together are a propylene group which, including a radical ##STR3## form a pyrrolidone radical, 0-90% by weight of structural units of the formula ##STR4## in which X is a halogen, preferably chloride, R.sup.5 and R.sup.6 independently of one another are C.sub.1 -C.sub.6 -alkyl, prefrably C.sub.1 -C.sub.3 -alkyl, in particular methyl or ethyl, and 0-90% by weight of structural units of the formula --CHR.sup.7 -CHR.sup.8 -- in which R.sup.7 is hydrogen or methyl and R.sup.8 is CONH.sub.2, CON(CH.sub.3).sub.2, cyano, SO.sub.3 H, SO.sub.3 Me, C.sub.6 H.sub.4 SO.sub.3 H, C.sub.6 H.sub.4 SO.sub.3 Me, CH.sub.2 SO.sub.3 H, CH.sub.2 SO.sub.3 Mr, COOH, COOMe or an ester group COOR, in which R is C.sub.1 -C.sub.15 -alkyl, preferably C.sub.1 -C.sub.8 -alkyl, as a detergent additive for preventing reabsorption of detached dyestuffs and dyestuff degradation products.

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First Claim