| abstract |
The invention relates to water-soluble, acid-containing grafted copolymers with at least partial biodegradability based on sugars and monoethylenically unsaturated carboxylic acids, sulfonic acids and / or phosphonic acids or salts of these acids, as well as, if necessary, other monomers. The invention further relates to a method for producing these grafted copolymers by radical initiated polymerization at temperatures up to 200 ° C, wherein a total mixture of 5-60 wt.% Of mono-, di- and oligosaccharides, their derivatives or mixtures thereof, is polynerised wt.% monomer mixture, which contains at least one monoethylenically unsaturated carboxylic acid, at least one monoethylenically unsaturated sulfonic acid, monoethylenically unsaturated sulfuric acid ester and / or vinylphosphonic acid or salts of these acids with one valent cations, and, if necessary, other monomers. The invention further relates to the use of grafted copolymers in aqueous systems, for the binding of multivalent metal ions |