Patent ID: 6103816
Filing Date: 2000-08-15
Classification: C08F,C08L,C09D

Abstract:
An aqueous-based curable liquid film-forming composition comprising (1) 50 to 90 percent by weight based on weight of resin solids in the film-forming composition of a material selected from the group consisting of polyesters, polyurethanes or mixtures thereof containing a plurality of terminal or pendant carbamate groups only of the structure: ##STR3## where X is --O and R is H; and (2) 10 to 50 percent by weight based on weight of resin solids in the film-forming composition of an aminoplast crosslinking agent containing methylol and/or methylol ether groups; said film-forming composition being crosslinkable through reaction of said pendant or terminal groups with said methylol and/or methylol ether groups; said film-forming composition being further characterized as having a calculated hydroxyl value less than 50 based on solid weight of said film-forming composition, excluding any hydroxyl functionality associated with N-methylol groups so as to result in a crosslinked coating which has a substantial number of urethane crosslinks arising from said reaction of pendant or terminal groups with said methylol and/or methylol ether groups, giving said crosslinked coating a high level of acid etch resistance.