Aqueous stain-blocking coating composition
AssigneeRohm and Haas Company
InventorsHai Deng, Kirti Deshmukh, Aurelia de la Cuesta Sheppard, Mark Robert Winkle
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Abstract
An aqueous stain-blocking coating composition including an aqueous emulsion copolymer having a glass transition temperature (Tg) from −20° C. to 60° C. and including, as polymerized units, at least one ethylenically unsaturated nonionic monomer and 1.5-6%, by weight based on the dry weight of the copolymer, ethylenically unsaturated strong acid monomer, such as a Phosphorous-containing strong acid monomer, or salts thereof is provided. Also provided is a method for blocking stains by applying the aqueous stain-blocking coating composition to a substrate bearing a stain; and drying, or allowing to dry, the aqueous composition.
Claims4
A method for blocking stains comprising
- (a) forming an aqueous coating composition consisting essentially of an aqueous emulsion copolymer, said copolymer having a glass transition temperature (Tg) from −20° C. to 60° C. and said copolymer comprising as polymerized units at least one ethylenically unsaturated nonionic monomer and 1.5-6%, by weight based on the dry weight of said copolymer, ethylenically unsaturated strong acid monomer, or salts thereof;
- (b) applying said aqueous composition to a substrate bearing a stain;
- and
- (c) drying, or allowing to dry, said aqueous composition.
Dependencies are inferred from the claim text.