Abstract: The present invention relates to thickener polymers which comprise the following structural elements 1-3: a) as structural feature 1 at least one betainic monomer unit according to the formula below with a proportion by weight of from 0.1 to 99.9% by weight, based on the copolymer in which the mutually independent definitions are as follows: m=integer?1; R1?H, C1-3 alkyl, —COOH; R2?H, C1-3 alkyl; R3=n- or isoalkylene of the formula —(CxH2x)—, in which x is an integer from 1 to 30; R4=—H, cycloalkyl, n- or isoalkyl, aryl; R5=n- or isoalkylene of the formula —(CyH2y)—, in which y is an integer from 1 to 30; A=—S—, —O—, —NR2, in which R2?H, C1-3 alkyl; b) as structural feature 2 at least one anionically charged monomer unit according to the following formula with a proportion by weight of from 0.1 to 99.

Abstract: The present invention relates to hydrophilically terminated amphiphilic polycondensates with a content of from 1 wt. % of copolymerized diol based on hydrogenated and doubly dehydrated aldo- and ketohexoses and use thereof in combination with polyester and polyester-containing surfaces.