Patent ID: 6942898

Claim:
A method for coating a friable surface comprising forming an aqueous coating composition comprising an emulsion polymer having a glass transition temperature of −20° C. to 100° C. and an average particle diameter less than 120 nanometers, said emulsion polymer consisting essentially of at least one copolymerized ethylenically unsaturated nonionic monomer, each of said nonionic monomer(s) having a water solubility less than 8% by weight, and at least one copolymerized acid monomer, such that the acid number of said emulsion polymer is 30 to 100, and 0.5-10%, by weight based on said emulsion polymer weight, water-soluble alkoxylated amine; applying said aqueous coating composition to a friable surface; and drying, or allowing to dry, said aqueous coating composition.