Alkaline resistant organic coatings for corrosion susceptible substrates I

Claim 1

A solvent based, pigmented primer composition, especially suitable for use in retarding corrosion of susceptible substrates without requiring chromate inhibiting pigments, which is an intimate admixture of film forming ingredients which consist essentially of: (A) A non-carboxy-ester linked epoxy reactant that has an average of aat least about two epoxy groups per molecule; (B) An amine reactant selected from the group consisting of primary, secondary and primary and secondary amines having a total of up to about 20 carbons per amino nitrogen and comprising at least about 75 mole percent hydroxy amine containing one or more primary hydroxy groups removed at least one carbon from any amino nitrogen; (C) Di or polyhydroxy compound having a boiling point exceeding about 150° C.; (D) An amine aldehyde resin at about 5-35% by weight of the combined weight of (A), (B) and (C) wherein the ratio of (A) to (B) is such that there is about 0.9-1 amine equivalent per 0.9-1 epoxy equivalent.