Patent ID: 6488983
Filing Date: 2002-12-03
Classification: C08F

Abstract:
A method for coating a substrate with an aqueous composition to provide an elastomeric coating on a substsrate comprising:forming said aqueous composition comprising a predominantly acrylic aqueous emulsion polymer, said polymer having a glass transition temperature (Tg) from âˆ’40Â° C. to 20Â° C., formed by the free radical polymerization of at least one ethylenically unsaturated nonionic acrylic monomer and 0.5-5%, by weight based on the total weight of said polymer, ethylenically unsaturated carboxylic acid monomer until 90-99.7% of said monomers by weight, based on the total weight of said polymer, has been converted to polymer, and subsequently polymerizing at least half of the remaining monomer to polymer in the presence of 0.1-1.0%, by weight based on the total weight of said polymer, t-amyl hydroperoxide; applying said aqueous composition to said substrate; and drying, or allowing to dry, said aqueous composition.