# US 5,704,995 A · Method for forming a black, adherent coating on a metal substrate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,995 A - Document ID: US5704995A - Status: Granted - Kind: A - Application number: 08/682,928 - Filed: 1996-07-16 - Granted: 1998-01-06 - Earliest claimed: 1996-07-16 - Assignees: Globe Motors, a Division of Labinal Components and Systems, Inc. - Inventors: Johnny LaDell Bradley - Web page: https://patentgrep.com/patent/US5704995A ## CPC - C23C 22/63: Treatment of copper or alloys based thereon - B05D 7/14: to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) - C08L 67/08: Polyesters modified with higher fatty oils or their acids, or with resins or resin acids - C08L 71/02: Polyalkylene oxides - C09D 5/08: Anti-corrosive paints - C23C 22/60: using alkaline aqueous solutions with pH greater than 8 - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) ## Abstract A black uniform coating with excellent adhesion, bend flexibility, and cosion resistant characteristics can be formed on metals such as aluminum and its alloys, zinc and its alloys, and copper and its alloys such as brass, with the deposition of zinc and antimony compounds through a base solution and sealed with a water base sealer. The water based sealer comprises an organic film forming resin, an organic solvent, and emulsifying agents and an alkyd resin. ## Claims ### Claim 1 A method for forming a black coating on a metallic substrate comprising the steps of: a) contacting said substrate with a blackening treatment comprising zinc and antimony; b) drying said substrate c) contacting said substrate with a sealing treatment comprising an organic film forming resin component, an organic solvent, and lacquer; and d) drying said substrate to thereby provide a dry, black coating on said substrate. ### Claim 2 (depends on 1) Method as recited in claim 1 further comprising after said step b), contacting said substrate with a corrosion treatment comprising a solution or dispersion including hexavalent chromium. ### Claim 3 (depends on 1) Method as recited in claim 1 wherein said organic film forming resin component comprises an acrylic polymer. ### Claim 4 (depends on 3) Method as recited in claim 3 wherein said acrylic polymer comprises a styrene/acrylic copolymer. ### Claim 5 (depends on 1) Method as recited in claim 1 wherein said organic solvent comprises a member selected from the group consisting of mono and dialkyl ethers of ethylene glycol and mixtures thereof. ### Claim 6 (depends on 5) Method as recited in claim 5 wherein said sealing treatment further comprises an alkyd resin. ### Claim 7 (depends on 5) Method as recited in claim 5 wherein said sealing treatment further comprises N-methylpyrrolidone. ### Claim 8 (depends on 5) Method as recited in claim 5 wherein said sealing treatment further comprises a compound containing hexavalent chromium. ### Claim 9 (depends on 1) Method as recited in claim 1 wherein said metallic substrate comprises aluminum or aluminum alloy. ### Claim 10 (depends on 1) Method as recited in claim 1 wherein said metallic substrate comprises copper or copper alloy. ### Claim 11 (depends on 10) Method as recited in claim 10 wherein said copper alloy is brass. ### Claim 12 Method of forming a black coating on a metallic substrate, said method comprising the steps of: a) contacting said metallic substrate with a basic blackening treatment solution or dispersion comprising zinc and antimony; b) forming a sealing treatment by the steps of: i) providing an emulsion including an organic film forming resin component; ii) providing a lacquer; iii) mixing said emulsion i) and lacquer ii) and adding water to said mixture of i) and ii) to form said sealing treatment, c) drying said metallic substrate after said step a); and then d) contacting said metallic substrate with said sealing treatment; and drying said metallic substrate. ### Claim 13 (depends on 12) Method as recited in claim 12 wherein said lacquer further comprises a hexavalent chromium compound. ### Claim 14 (depends on 12) Method as recited in claim 12 wherein said method is devoid of a heating step. ### Claim 15 (depends on 14) Method as recited in claim 14 wherein said organic film forming resin component comprises an acrylic polymer. ### Claim 16 (depends on 15) Method as recited in claim 15 wherein said acrylic polymer comprises a styrene/acrylic copolymer. ### Claim 17 (depends on 12) Method as recited in claim 12 further comprising, prior to said step (a), cleaning said metallic substrate. ### Claim 18 (depends on 12) Method as recited in claim 12 further comprising subsequent to said step (a) and prior to said step (d), an additional step of contacting said metallic substrate with a corrosion inhibiting treatment comprising hexavalent chromium. ### Claim 19 (depends on 12) Method as recited in claim 12 wherein said zinc and antimony are present in said blackening treatment solution or dispersion in elemental, particle form, said zinc being present relative to said antimony in an amount of 2:1.