Patent ID: 6509064
Filing Date: 2003-01-21
Classification: C08F,C08L,C09D,C09J

Abstract:
A method for producing a coating on a friable surface comprising:(1) applying to said friable surface a layer of an aqueous coating composition comprising a plurality of polymeric particles, each of said particles consisting essentially of: (a) at least one polymer A having a glass transition temperature of âˆ’20Â° C. to 100Â° C., wherein said polymer A is an emulsion polymer consisting essentially of: (i) at least one copolymerized ethylenically unsaturated nonionic monomer having a water solubility at 25Â° C. less than 8% by weight, based on the weight of water; and (ii) at least one copolymerized acid monomer, such that the acid number of said polymer A is 13 to 260 mg of KOH per g of polymer; and (b) at least one polymer B having a glass transition temperature of âˆ’20Â° C. to 100Â° C., wherein said polymer B is an emulsion polymer comprising, as polymerized units, at least one ethylenically unsaturated nonionic monomer, wherein said particles have an average particle diameter less than 120 nanometers; and (2) drying said coating composition.