Patent ID: 6680356
Filing Date: 2004-01-20
Classification: C08G,C09D,Y10T

Abstract:
A pigmented coating composition, containing a film forming binder and a volatile organic liquid carrier for the binder, wherein the binder contains(A) a hydroxyl component comprising at least one hydroxyl-containing acrylic polymer and at least one hydroxyl-terminated polyester oligomer; and (B) an organic polyisocyanate component, at least a portion of which comprises a trimer of isophorone diisocyanate; wherein the ratio of equivalents of isocyanate per equivalent of hydroxyl groups in the binder is in the range of about 0.5/1 to 3.0/1; wherein the composition further contains (C) a catalyst system for the binder comprising about (i) 0.005-0.2% by weight, based on the weight of the binder, of organotin catalyst, (ii) 0.01-1% by weight, based on the weight of the binder, of tertiary amine catalyst, and (iii) 0.005-1%, based on the weight of the binder, of organic carboxylic acid catalyst wherein the coating composition cures at ambient temperatures to a water spot free and sand and buff state within 4 hours after application.