HYDROPHOBICALLY ASSOCIATED POLYMERS IN WATER-IN-WATER POLYMER DISPERSIONS

摘要

The invention relates to a method for manufacturing a water-in-water polymer dispersion which comprises subjecting an aqueous reaction mixture comprising (i) a cationic polymeric dispersant and (ii) a monomer composition containing a) 45 to 99 mole.-% of one or more non-ionic ethylenically unsaturated monomers, based on the total molar amount of monomers; and b) 0.001 to 50 mole.-% of one or more cationic ethylenically unsaturated monomers, based on the total molar amount of monomers; and c) 0.001 to 27.5 mole.-% of one or more hydrophobic monomers according to general Formula (I) wherein R1 means hydrogen or C1-C-3-alkyl; R2 means C5-C24-alkyl; and Z0 means O, NH or NR3 with R3 being C1-C3-alkyl, based on the total molar amount of monomers; to a free radical polymerization reaction such that the resulting water-in-water polymer dispersion contains a cationic copolymer.