Patent ID: 7019070

Claim:
An aqueous coating composition having a pH of 6.0–10 and comprising 30% to 70% by weight of film-forming binder and correspondingly 70% to 30% by weight of an aqueous liquid carrier for the binder; wherein the binder comprises a. 20% to 95% by weight, based on the weight of the binder, of a urethane oligomer having a weight average molecular weight of 300–2500 consisting of the reaction product of an aliphatic polyisocyanate, a hydroxy functional aliphatic carboxylic acid and a monohydric alcohol selected from the group consisting of aliphatic monohydric alcohol and cycloaliphatic monohydric alcohol, wherein the acid groups formed thereon are neutralized with an amine to provide a water-dispersible product; and b. 5% to 80% by weight, based on the weight of the binder, of a water-soluble or water-dispersible alkylated melamine crosslinking agent.