Hydroxy-functional binder components

Reaction products of

• hydroxy-functional binder components containing a linear or branched main chain which has a polymethylene structure —(CH2)n— or a polyester structure or a structure derived from fatty acid esters of glycerol or other polyhydric alcohols, characterised in that they have cyclic imide structures grafted on to the main chain, the imide nitrogen atom carrying a hydroxyalkyl group or a hydroxyalkyl-aryl group as substituent, and
• compounds selected from the group consisting of
• compounds D′ containing acid groups, wherein the reaction is an esterification reaction, and wherein water is removed, and wherein the reaction products contain at least one acid group per molecule, and of
• compounds D″ selected from the group consisting of compounds having at least one isocyanate group and one acid group, and of compounds having at least one isocyanate group and at least one olefinically unsaturated group, wherein the reaction is an addition reaction, and wherein the reaction products have a urethane, an urea, or a thiourea structure, and wherein the reaction products contain, per molecule, at least one acid group, or at least one olefinically unsaturated group.