Patent ID: 7049357
Filing Date: 2006-05-23
Classification: C08K

Abstract:
1. An ambient dry paint coating composition substantially free of volatile organic coalescing solvent, the paint having a film forming polymeric binder comprising by weight: an aqueous emulsion polymeric film forming matrix polymer of copolymerized ethylenically unsaturated monomers; and at least 3% of a low molecular weight poly(hydroxy alkanoic acid) oligomer of copolymerized hydroxy alkanoic acid having from 2 to 4 carbon atoms and being an external modifier of the matrix polymer, the oligomer having number average molecular weight between about 300 and 10,000 and a Tg below about 0° C., the oligomer having terminal alkyl aliphatic ester groups where the alkyl chain has from 3 to 20 carbon atoms, where the mixture of the oligomer and the matrix polymer are film forming and provide an air dry coating composition substantially free of organic coalescing solvent.