# US 2019/0168256 A1 · Painted metal plate and method for manufacturing same

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- Number: US 2019/0168256 A1
- Document ID: US20190168256A1
- Status: Published application
- Kind: A1
- Application number: 16/323,042
- Filed: 2017-04-11
- Published: 2019-06-06
- Earliest claimed: 2016-08-02
- Assignees: Nisshin Steel Co., Ltd.
- Applicants: Nisshin Steel Co., Ltd.
- Inventors: Masaki SATOU; Seiju SUZUKI; Masaru HIRAKU; Shuichi SUGITA
- Web page: https://patentgrep.com/patent/US20190168256A1

## CPC

- B05D 3/08: by flames
- B05D 1/28: performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
- B32B 15/082: comprising vinyl resins; comprising acrylic resins
- B32B 15/09: comprising polyesters
- C09D 133/04: Homopolymers or copolymers of esters {(C09D143/04 takes precedence)}
- C09D 167/00: Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain (based on polyester-amides C09D177/12; based on polyester-imides C09D179/08); Coating compositions based on derivatives of such polymers
- B05D 3/142: {Pretreatment}
- B05D 7/14: to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23)
- B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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

The purpose of the present invention is to provide a method for manufacturing a painted metal plate which is resistant to surface stain due to rain streaks. The painted metal plate manufacturing method comprises: a step of forming a coating film on a surface of a metal plate, the coating film having an arithmetic mean roughness Ra of 0.3 to 3.0 μm as calculated according to JIS B0601:2013, and a surface Si atomic concentration of less than 1.0 atm % as measured by X-ray electron spectroscopy using an AlKα beam as an X-ray source; and a step of subjecting the coating film to flame processing at 30 to 1000 kJ/m2.

## Claims

### Claim 1

A method for manufacturing a coated metal sheet, the method comprising:
forming a coating on a surface of a metal sheet, the coating having arithmetic average roughness Ra of 0.3 to 3.0 μm and silicon atom concentration of less than 1.0 atm % on a surface of the coating, the arithmetic average roughness Ra being calculated in accordance with JIS B0601:2013, and the silicon atom concentration being measured by X-ray electron spectroscopy using an AlKα ray as an X-ray source; and
subjecting the coating to flame treatment at 30 to 1,000 kJ/m2.

### Claim 2 (depends on 1)

The method for manufacturing a coated metal sheet according to claim 1, wherein:
the coating contains a polyester resin or an acrylic resin.

### Claim 3

A coated metal sheet, comprising:
a metal sheet; and
a coating having arithmetic average roughness Ra of 0.3 to 3.0 μm, silicon atom concentration of less than 1.0 atm % on a surface of the coating, and a methylene iodide sliding angle of 15° or more and 45° or less on the surface, the coating being disposed on the metal sheet, the arithmetic average roughness Ra being calculated in accordance with JIS B0601:2013, and the silicon atom concentration being measured by X-ray electron spectroscopy using an AlKα ray as an X-ray source,
wherein the coating is subjected to frame treatment.

### Claim 4 (depends on 3)

The coated metal sheet according to claim 3, wherein:
the coating contains a polyester resin or an acrylic resin.