Method for forming a glossy multi-layer coating film

Abstract

To provide a multilayer coating film formation method which enables formation of a coating film having less unevenness and excellent brightness even under a normal temperature drying condition.SOLUTION: A brilliant multilayer coating film formation method includes a step (1) of coating a coloring coating material (I) containing a coloring pigment and a resin component onto a base material surface so that a thickness of a colored coating film is equal to or thicker than a covering film thickness, and drying the coloring coating material and providing a colored coating film, and a step (2) of coating a brilliant coating material (II) containing a brilliant pigment and a resin component onto the colored coating film obtained in the step (1), drying the brilliant coating material, and forming a brilliant coating film, in which the colored coating film does not contain a brilliant pigment or has a content of the brilliant pigment smaller than that of the brilliant coating film, and the brilliant coating film contains 0.05-15 mass% of the brilliant pigment and is thinner than a covering film thickness.SELECTED DRAWING: None

Claims

1. Step (1) involves applying a colored coating (I) containing colored pigments and resin components to the substrate surface such that the thickness of the colored coating film is equal to or greater than the opacity film thickness, and drying it to form a colored coating film, and The process includes step (2), in which a glossy paint (II) containing a glossy pigment and a resin component is applied to the colored coating obtained in step (1), and dried to form a glossy coating. The aforementioned colored coating film either does not contain a lustrous pigment or contains less lustrous pigment than the aforementioned lustrous coating film. The aforementioned glossy paint (II) is a multi-component paint comprising a main component and a curing agent component, and further comprising a main component comprising a hydrolyzable silyl group-containing acrylic resin, polysiloxane resin, epoxy resin and glossy pigment, and a curing agent component comprising an amino group-containing alkoxysilane compound, A method for creating a glossy multilayer coating film in which the glossy coating film contains glossy pigment in the range of 0.05 to 10% by mass and has a thickness less than the opacity film thickness.

2. The method for forming a glossy multi-layer coating film according to claim 1, wherein the substrate surface is the substrate surface of a building.

3. The method for forming a glossy multilayer coating film according to claim 1 or 2, wherein the colored paint (I) is a room-temperature drying type paint.

4. The colored paint (I) has a lightness (L ＊ ) is within the range of 40 to 95, and saturation (C ＊ A method for forming a glossy multilayer coating film according to any one of claims 1 to 3, wherein the coating film has a density of 40 or less.

5. A method for forming a glossy multilayer coating film according to any one of claims 1 to 4, wherein a colored coating film made of a colored paint (I) is formed by a roller.

6. A method for forming a lustrous multilayer coating film according to any one of claims 1 to 5, wherein the lustrous pigment is an aluminum flake pigment and / or a light-interfering pigment.

7. The method for forming a lustrous multilayer coating film according to claim 6, wherein the lustrous pigment includes an aluminum flake pigment, and the aluminum flake pigment is of the non-leafing type or the leafing type.

8. A method for forming a lustrous multilayer coating film according to claim 6 or 7, wherein the lustrous pigment includes an aluminum flake pigment, and the average particle size of the aluminum flake pigment is in the range of 5 to 250 μm.

9. A method for forming a lustrous multilayer coating film according to any one of claims 6 to 8, wherein the lustrous pigment includes a light-coherent pigment, and the average particle size of the light-coherent pigment is in the range of 5 to 250 μm.

10. A method for forming a lustrous multilayer coating film according to any one of claims 6 to 9, wherein the lustrous pigment comprises an aluminum flake pigment and a light-interfering pigment in a mass ratio of 10 / 90 to 90 / 10 of the former to the latter.

11. A method for forming a glossy multilayer coating film according to any one of claims 1 to 10, wherein the glossy coating (II) further comprises an organic solvent and / or a curing catalyst.

12. A method for forming a glossy multilayer coating film according to any one of claims 1 to 11, wherein a glossy coating film made of glossy paint (II) is formed by a roller.

13. A method for forming a glossy multi-layer coating according to any one of claims 1 to 12, further comprising step (3) of applying a clear coating (III) different from the glossy coating (II) on top of the glossy coating formed in step (2).

14. The method for forming a glossy multilayer coating film according to claim 13, wherein a clear coating film made of clear paint (III) is formed by a roller.

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