Patent ID: 7659341

Claim:
FDA-compliant aqueous coating compositions comprising A) one or more water-dilutable polyester polyols having an OH number of from 20 to 300 mg KOH/g and an acid number of from 20 to 80 mg KOH/g, obtained by reacting a) 49 to 40 mol % of a carboxylic acid component comprising a1) one or more aliphatic, cycloaliphatic, araliphatic and/or aromatic carboxylic acids with a COOH functionality ≧2 or anhydrides thereof and a2) if desired, aromatic, cycloaliphatic and/or aliphatic monocarboxylic acids with b) 51 to 60 mol % of an alcohol component comprising b1) one or more aliphatic, cycloaliphatic and/or araliphatic polyols with a number-average molecular weight of from 62 to 272 g/mol and an average OH functionality ≧2 and b2) if desired, aliphatic, cycloaliphatic and/or araliphatic monoalcohols, B) one or more OH-reactive crosslinkers selected from the group consisting of phenolic resins, hexamethoxymethylmelamine resins, and benzoguanidine resins each having a functionality (based on OH-reactive groups) of ≧2 C) water, D) neutralizing agents and E) optionally solvents, auxiliaries and additives.