| abstract |
Water-soluble branched block copolymers of polymeric backbone chains of quaternary ammonium units of the general formula I With R 1 = H, alkyl (C 1 -C 8), X - = matching counterion, wherein the backbone chains are linked together by individual units of the general formula I by polyalkylene glycol blocks of units of the general formula II With R 2 = H, methyl, ethyl, X - = matching counterion, n = independently of each other 1 to 3, a = 6 to 100 and b = 0 or a = 6 to 40 and b = 6 to 40 are replaced and the mass fraction of the units of the general formula II is between 0.01 and 20 wt .-%, based on the total block copolymer. |