| abstract |
A carboxyl-group-containing polyester having an acid number of from 30 to 150, a hydroxyl number of from 20 to 150 and a Patton alkyd constant of from 0.9 to 1.2 which contain in co-condensed form (a) saturated alcohols selected from the group consisting of dihydric aliphatic, polyhydric aliphatic, dihydric cycloaliphatic, and polyhydric cycloaliphatic alcohols, (b) dicarboxylic acids selected from the group consisting of aliphatic, aromatic and cycloaliphatic dicarboxylic acids, (c) cyclic carboxylic acids selected from the group consisting of tribasic and polybasic cyclic carboxylic, characterized in that of the co-condensed compounds (c), which are only attached to the polyester through a carboxyl group, at least one other carboxyl group is condensed with a compound selected from the group consisting of aliphatic monoalcohols having from 3 to 20 carbon atoms, cycloaliphatic monoalcohols having from 3 to 20 carbon atoms and secondary amines containing from 6 to 36 carbon atoms, a process for its preparation, and an aqueous coating composition containing it. |