Water-based coating compositions containing hydroxides and oxides of calcium, strontium and barium

A water-based coating composition comprising:

• a mixture of Part A and Part B components;
• said Part A component comprising a mixture of polyaldehyde chosen from the group consisting of glyoxal, glutaraldehyde and derivatives of either of these which retain free aldehyde groups, and an aqueous component selected from the group consisting of (I) epoxy resin emulsions, (II) an aqueous component other than an epoxy resin emulsion selected from the group consisting of synthetic latexes stable at pH 7 or less, low molecular weight resin emulsions, epoxy ester emulsions, water emulsified alkyds, and cationic-, anionic- and non-ionic asphalt emulsions, and (III) mixtures of (I) and (II);
• and
• said Part B component comprising the non-gel reaction product of (I) urea-formaldehyde ether monomer, urea-formaldehyde phenol monomer, urea-nonylphenol formaldehyde monomer, thiourea-formaldehyde ether monomer, melamine formaldehyde ether monomer hexamethoxymethyl melamine, with (II) a polyamine chosen from the group consisting of primary amines, and secondary amines and amide-amines, and with (III) a hydroxide or an oxide of calcium, strontium or barium.