Patent ID: 8293321
Filing Date: 2012-10-23
Classification: B05D,C08G,C08L,C09D

Abstract:
1. A process for repairing a clear coat of a clear coat/color coat coating composition which comprises applying a layer of a clear coating composition to the clear coat and curing the layer of the applied clear coating composition, wherein, said clear coating composition contains a film forming binder and a volatile organic liquid carrier for the binder, wherein the film forming binder contains: (A) a hydroxyl polymer component comprising at least one hydroxyl-containing acrylic polymer; (B) at least one hydroxyl-terminated component selected from the group consisting of (1) an organic diol having the formula (C) an organic polyisocyanate component, at least a portion of which comprises a trimer selected from the group consisting of a trimer of isophorone diisocyanate and a trimer of hexamethylene diisocyanate and any mixtures thereof, wherein the organic polyisocyanate component further comprises at least one of an asymmetric hexamethylene diisocyanate trimer, a biuret of hexamethylene diisocyanate, a biuret of isophorone diisocyanate and any mixtures thereof; wherein the clear coating composition further contains (D) a catalyst system for the binder comprising wherein the clear coating composition cures at ambient temperatures to a water spot free state within 2 hours after application; wherein the hydroxyl containing acrylic polymer comprises 5 to 50% by weight, based on the weight of the acrylic polymer, of a hydroxyl acrylic polymer having a weight average molecular weight of above 10,000 to 20,000, 20-60% by weight, based on the weight of the acrylic polymer, of a hydroxyl acrylic polymer having a weight average molecular weight of above 7,000 and up to 10,000 and 20-70% by weight by weight, based on the weight of the acrylic polymer, of a hydroxyl acrylic polymer having a weight average molecular weight of 2,000 up to 7,000.