abstract |
The invention relates to a water soluble, hydrophobic associating copolymer, comprising a monoethylenic unsaturated, water soluble, surface active monomer (a), and a monoethylenic unsaturated, hydrophilic monomer (b) different from monomer (a). The copolymer is produced in the presence of a non-polymerizable tenside and has pronounced thickening properties in aqueous systems. |