Patent ID: 7087672
Filing Date: 2006-08-08
Classification: C08L,C09D

Abstract:
1. An aqueous coating composition having a VOC of less than 0.12 kg/L (1.0 pounds/gallon) comprises 25% to 70% by weight of film-forming binder and correspondingly, 75% to 30% by weight of an aqueous liquid carrier for the binder and containing pigment in a pigment to binder weight ratio of 5/100 to 150/100 and having a pH of 7-10; wherein the binder comprises a. 50% to 95% by weight, based on the weight of the binder, of a blend of polymers comprising a dispersed acrylic polymer, a dispersed polyester having an acid value of 15 to 60, a number average molecular weight from 1500 to 7000 and further having a hydroxyl value with the hydroxyl value being not more than 95 and a hydroxy terminated component selected from the group consisting of a polyalkylene ether polyol, a urethane diol, or a mixture of the above, and; b. 10% to 50% by weight, based on the weight of the binder, of a water-compatible alkylated melamine formaldehyde crosslinking agent; and wherein a hydroxy functional alkyl amine is used to neutralize the binder and adjust the pH of the composition.