Water-based epoxy acrylic coating compositions

A water-based sealer composition comprising:

• A. an emulsion of a partially-solubilized polymeric binder in water, wherein the polymeric binder comprises:
• 1. from about 25 to about 75 percent by weight of polymer solids of an acrylic interpolymer derived from an alkyl acrylate or methacrylate ester, an ethylenically unsaturated carboxylic acid, and, optionally, at least one other copolymerizable ethylenically unsaturated monomer, wherein at least part of the acid carboxylic groups have been iminated with an alkylenimine, wherein said interpolymer is partially solubilized with a solubilizing agent, and wherein said acrylic interpolymer prior to partial solubilization with said solubilizing agent has an acid number of from about 25 to about 100;
• and
• 2. from about 25 to about 75 percent by weight of polymer solids of a high molecular weight epoxy resin having the structure:
• ##EQU6## wherein n is an integer sufficient to provide the resin with a molecular weight of at least about 20,000;
• R.sub.1 is a divalent aromatic radical selected from the group consisting of bisphenol A, substituted bisphenol A, bis-phenol F, and substituted bisphenol F;
• R.sub.2 is a C.sub.1 to C.sub.5 alkyl;
• and R.sub.3, R.sub.4, and R.sub.5 are individually selected from the group consisting of hydrogen and a C.sub.1 to C.sub.5 alkyl.