Patent ID: 9238747
Filing Date: 2016-01-19
CPC Classification: C09D

Claim Text:
1. An aqueous coating composition for blocking stains, comprising: an aqueous dispersion comprising a single stage emulsion copolymer having a glass transition temperature (Tg) of from 0° C. to 45° C. and derived from a single stage emulsion polymerization of ethylenically unsaturated nonionic monomers comprising 30 to 60% by weight styrene, 15 to 65% by weight 2-ethylhexyl acrylate, 0 to 35% by weight butyl acrylate, and 0.5 to 5% by weight ureido functional monomer, greater than 0 and less than 1.5% by weight of an ethylenically unsaturated strong acid monomer or salt thereof, and greater than 1.5% and less than 3% by weight of methacrylic acid or salt thereof, wherein all the copolymers in the dispersion derived from an alkyl ester of acrylic acid or methacrylic acid have a glass transition temperature (Tg) of from 0° C. to 45° C.