Article coated with aqueous dispersion of fluoropolymers in combination with epoxy-type film formers

An article coated with a cured coating of an aqueous coating composition having a dispersed phase which consists essentially of:

• (A) 90 to 10% by weight, based on the weight of (A) plus (B), of the reaction product of:
• (1) at least 50%, based on the weight of (1) plus (2), of an epoxy resin containing, on the average, two terminal 1,2-epoxy groups per molecule and having an epoxy equivalent weight of 750-5000;
• (2) a carboxyl-functional polymer in an amount sufficient to provide at least 2.50 equivalents of carboxyl groups, when the source of the carboxyl group is a mono-protic acid, and at least 4.0 equivalents of carboxyl groups, when the source of such groups is a diprotic acid, per equivalent of 1,2-epoxy groups in the epoxy resin, said polymer having a weight average molecular weight (determined by light scattering) of about 10,000-160,000 and an acid number of 200-500;
• (3) an aqueous solution of at least 1.50 equivalents of a tertiary amine per equivalent of 1,2-epoxy groups in the epoxy resin, said tertiary amine being selected from the group consisting of R.sub.1 R.sub.2 R.sub.3 N, pyridine, N-methylpyrrole, N-methyl piperidine, N-methyl pyrrolidine, N-methyl morpholine, and mixtures thereof and wherein R.sub.1 and R.sub.2 are substituted or unsubstituted monovalent alkyl groups containing one or two carbon atoms in the alkyl portion and R.sub.3 is a substituted or unsubstituted monovalent alkyl group containing 1-4 carbon atoms;
• and
• (4) 10-90% of the amount required for stoichiometric reaction with the carboxyl-functional polymer of (2), of at least one primary, secondary or tertiary amine or monofunctional quaternary ammonium hydroxide, such that the pH of the reaction product of (A) is greater than 8.5;
• Y being at least about 6+0.75 (2.sup.x), where Y is the milliequivalent of carboxyl groups neutralized by primary, secondary or tertiary amine or monofunctional quaternary ammonium hydroxide per 100 grams of acid polymer plus epoxy, and X is the epoxy equivalent weight divided by 1000;
• and wherein for increasing ratios of carboxyl groups to 1,2-epoxy groups, the amount of amine is increased to keep the carboxyl-functional polymer water dispersible;
• (B) 10-90% by weight, based on the weight of (A) plus (B), of a fluorocarbon polymer;
• and
• (C) optionally, up to 20% by weight, based on the weight of (A), of a nitrogen or phenolic crosslinking agent.