METHOD FOR FORMING MULTILAYER COATED FILM

• US 20160288164A1
• Filed: 03/30/2016
• Published: 10/06/2016
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Kansai Paint Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Kansai Paint Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: SATO, Kazuhide, UKAI, Yoshiaki, AMBO, Keiji, ITO, Katsunori, TSUKAMOTO, Akiyo, MURATA, Hiroshi
• Granted Patent: US 10,441,970 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B05D 5/068 achieved by multilayers B05D5/066 takes precedence
• CPC Class Codes: B05D 7/576 each layer being cured, at least partially, separately

Abstract

A method for forming a multilayer coated film on an object includes steps (1) to (3) below. A first colored coating material is applied to the object, thereby forming a first colored coated film (step (1)). The first colored coating material includes an iron-oxide-coated aluminum pigment and a quinacridone pigment and has a light reflectance property at specific wavelengths. A second colored coating material is applied to the first colored coated film, thereby forming a second colored coated film (step (2)). The second colored coating material includes a perylene pigment and has a specific hue. A clear coating material is applied to the second colored coated film (step (3)). A color difference ΔE between the first colored coated film and the multilayer coated film is in a range of 20 to 30.

Claims

1. A method for forming a multilayer coated film on an object to be coated, the object to be coated having undergone electrodeposition coating and intermediate coating, the method comprising the following steps (1) to (3):

step (1);

applying a first colored coating material to the object, thereby forming a first colored coated film, the first colored coating material containing an iron-oxide-coated aluminum pigment and a quinacridone pigment and giving a cured coated film which, when having a thickness of 10 μ

m, has a light reflectance in a range of 30% to 35% at wavelengths of 650 nm to 700 nm and has a light reflectance in a range of 15% or less at wavelengths of 410 nm to 440 nm and at wavelengths of 510 nm to 590 nm,

step (2);

applying a second colored coating material to the first colored coated film, thereby forming a second colored coated film, the second colored coating material containing a perylene pigment and giving a cured coated film which, when having a thickness of 7 μ

m, has a hue in a range of 35°

±

5°

in terms of hue angle h according to L*C*h color system chromaticity diagram, and

step (3);

applying a clear coating material to the second colored coated film, thereby forming a clear coated film,

wherein a color difference AF between the first colored coated film and the multilayer coated film obtained by the steps (1) to (3) is in a range of 20 to 30.

2. The method for forming a multilayer coated film according to claim 1, wherein the first colored coated film has a thickness in a range of 5 μ

m to 15 μ

m in terms of the thickness of the cured coated film.

3. The method for forming a multilayer coated film according to claim 1, wherein the second colored coated film has a thickness in a range of 4 μ

m to 10 μ

m in terms of the thickness of the cured coated film.

4. A coated article obtained by the method for forming a multilayer coated film according to claim 1.