The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2002
Filed:
Apr. 10, 2001
Hai Deng, Downingtown, PA (US);
Kirti Deshmukh, Warminster, PA (US);
Aurelia de la Cuesta Sheppard, Newtown, PA (US);
Mark Robert Winkle, Lansdale, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
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.