PPG patents aqueous coating

December 4, 2012

U.S. 8,143,341 B2
PPG Industries has been granted a patent for an aqueous coating composition comprised of water, coloring agent, a film-forming polymer containing functional groups, a curing agent for the film forming polymer having functional groups that are reactive with the functional groups and a linear adjuvant resin having hydroxyl groups reactive with the functional groups, wherein the hydroxyl groups are located at the terminal ends of the adjuvant resin; and wherein the adjuvant resin further is comprised of a hydrocarbon moiety comprised of from 16-40 contiguous carbon atoms positioned between the hydroxyl groups; and wherein the hydroxyl groups are derived from a polyol and the hydrocarbon moiety is derived from a linear dicarboxylic acid; the adjuvant resin having a hydroxyl group equivalent weight of from 100-500 and an acid value less than 5.