Chromate-free black-coated metal plate
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsAtsushi Morishita, Kimitaka Hayashi, Masahiro Fuda
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Abstract
An inexpensive chromate-free black metal sheet not containing the high environmental load hexavalent chromium and extremely excellent in finish (coloring power and concealing power including worked parts), moisture resistance, corrosion resistance, formability, scratch resistance, chemical resistance, etc. The present invention is a chromate-free black-coated metal plate characterized by comprising a metal sheet on at least one surface of which is formed a black coating (α), containing a polyester resin (A1) containing sulfonic acid groups cured by a curing agent (B) and carbon black (C), of a thickness of 2 to 10 μm.
Claims20
A chromate-free black-coated metal plate characterized by comprising a metal sheet on at least one surface of which is formed a black coating (α), comprising a polyester resin (A1) containing sulfonic acid groups cured by a curing agent (B) and carbon black (C), of a thickness of 2 to 10 μm, wherein said black coating (α) is formed by coating a water-based black paint containing a polyester resin (A1) containing sulfonic acid groups, a curing agent (B), and carbon black (C) on a metal sheet, and heating the coated metal sheet to dry.
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Dependencies are inferred from the claim text.