Simulated weathered-copper coatings for metal

Abstract

Processes for the application of new water-reducible and solvent-based coatings to various substrates to simultaneously impart copper-like metal and patina coloration to achieve a simulated weathered copper appearance are described, as well as the articles produced thereby. The coatings are preferably applied to a primed metal substrate, especially coil coating stock, in a two-step process comprising a first application of a base coat containing a dominant patina-color-producing colorant followed by application of a top coat applied to the cured base coat, the top coat containing a copper-color-producing colorant. After final cure, the substrate exhibits both a copper metallic appearance by reflection of incident light from the top coat and a patina appearance by transmission of light to and reflection from the base coat.

Dependencies are inferred from the claim text.