AQUEOUS EMULSION COATINGS COMPOSITION COMPRISING SELF-EMULSIFIABLE EPOXY ESTER COPOLYMER MIXTURE

摘要

A nongelled hydroxy ester copolymer composition substantially free of oxirane functionality comprising an acidic copolymer-epoxy resin hydroxy ester reaction product, the epoxy resin being a mixture containing at least 5% by weight of aromatic polyether which is difunctional in oxirane functionality which is consumed by reaction with the acidic copolymer and the acidic copolymer being a solution copolymer of monoethylenically unsaturated monomers comprising at least about 20% of monoethylenically unsaturated carboxylic acid, based on the total weight of monomers, the epoxy resin mixture constituting at least about 40% of the total resin solids content and providing oxirane functionality in a stoichiometric deficiency with respect to carboxyl functionality in the acidic copolymer of from 1:2 to 1:20, at least a portion of the carboxyl functionality in the copolymer-epoxy resin hydroxy ester reaction product being reacted with a base to render the reaction product self-emulsifiable in water.