| abstract |
The subject of the invention has a molecular weight of less than 500,000 compared to the total weight of the copolymerizate; a) monomer units containing 20 to 95% of the weight sulfonic acid or sulfonate groups, b) monomer units containing 4 to 80% of the weight N-Methylol or N-Alkoxymethyl groups, c) 0.1% to weight 20% water-insoluble, containing hydrophobic monomer units from unsaturated bond groups and starting materials or hydrophobic end groups of regulatory molecules, and containing sulfonic acid / sulfonate groups relative to the weight of the monomer units; a) up to 50% of the weight of the monomer units, d) monomer units containing carboxyl groups, or e) water soluble, copolymerizable, which can be used with monomer units containing amide groups. |