Patent ID: 6946515

Claim:
A coating material comprising (I) a component comprising at least one oligomeric or polymeric resin containing functional groups which react with isocyanate groups, as binder (A), (II) a component comprising at least one polyisocyanate as crosslinking agent (B), and (III) a component which comprises water, wherein at least one of component (I) or (III) comprise at least one substantially unbranched, hydrophobic polyester (C) comprising at least two hydroxyl groups in the molecule, an OH number of from 56 to 500 mg KOH/g, an acid number <10 mg KOH/g and a number-average molecular weight Mn of from 300 to 2 000 daltons wherein the substantially unbranched, hydrophobic polyester has the general formula 1. [R 1 —CH(OH)—CH 2 —OOC—] 2 R (1) wherein: R=substituted or unsubstituted divalent C 1 to C 20 alkanediyl, C 2 to C 20 alkenediyl, C 4 to C 20 cycloalkanediyl or cycloalkenediyl, C 6 to C 12 arylidene, divalent C 6 to C 20 arylalkyl, arylalkenyl, arylcycloalkyl or arylcycloalkenyl radical; or substituted or unsubstituted divalent aliphatic, cycloaliphatic, acyclic or cyclic olefinically unsaturated, aromatic, aliphatic-aromatic, cycloaliphatic-aromatic, acyclic unsaturated aromatic or cyclic unsaturated aromatic radical which contains at least one carboxylic ester group; R1=hydrogen atom or monovalent substituted or unsubstituted C1 to C20 alkyl, C2 to C20 alkenyl, C4 to C12 cycloalkyl or cycloalkenyl, C6 to C12 aryl or C6 to C20 arylalkyl, arylalkenyl, arylcycloalkyl, arylcycloalkenyl, alkylaryl, alkenylaryl, cycloalkylaryl, cycloalkenylaryl, alkylcycloalkyl, alkylcycloalkenyl, alkenylcycloalkyl, alkenylcycloalkenyl, cycloalkylalkyl, cycloalkenylalkyl, cycloalkylalkenyl or cycloalkenylalkenyl radical.