Vandfortyndbare polyestere med cyclisk imidstruktur

摘要

Polyesterpolyols having cyclic imide groups are new. Polyesterpolyols (I) containing structural units of formula (1) and (2) are new. (Structure (II), Independent claims are included for: (1) a process for the preparation of the polyesterpolyols (I) by reaction of an anhydride of trimellitic acid and/or pyromellitic acid with a cyclic lactam, addition of an alcohol component containing at least one (cyclo)aliphatic 3-10C polyol having a functionality greater than 2, at least one (cyclo)aliphatic 2-18C diol and optionally at least one (cyclo)aliphatic or araliphatic monofunctional 1-18C alcohol as well as an acid component containing at least one difunctional carboxylic acid or their anhydride and/or at least one polyfunctional carboxylic acid or their anhydride and optionally at least one monocarboxylic acid to form a hydroxyfunctional polyester; (2) an aqueous or solvent borne binding agent (II) containing a polyesterpolyol (I); (3) a coating agent (III) containing a polyesterpolyol (I); (4) a process for the preparation of the coating agent (III) by addition of a polyisocyanate component and optionally other binding agents to the binding agent (II); (5) a process for the production of coated substrates by use of the coating agent (III); (6) a process for the adhesion of substrates by use of the coating agent (III); and (7) substrates having a coating containing the cross-linked polyesterpolyols (I).