Highly crosslinking coating formulation for can interior surfaces

The present invention relates to a water-based interior can coating based on a copolymer or a Copolymerenmischung at least one aliphatic and acyclic alkene with at least one α, β-unsaturated carboxylic acid in water-dispersed form, the internal can coating a water-soluble curing agent selected from inorganic compounds of the elements Zr and / or Ti can be largely dispensed with so that organic hardener systems. Furthermore, the present invention relates to a process for internal coating of tin-plate or aluminum cans, wherein the above-mentioned doses inner coating is applied directly to the metallic inner surfaces of the can and cured, without the need for paint adhesion improving conversion treatment of the inner surfaces of the cans must be made before.