Coated metal sheet, method for manufacturing same, and exterior building material

A coated metal sheet comprising:

• a metal sheet,
• an intercoat coating film disposed on the metal sheet, and
• an overcoat coating film disposed on the intercoat coating film,
• wherein the overcoat coating film comprises a resin, a gloss adjusting agent which is particles having micropores, and a matting agent which is primary particles,
• wherein a content of the gloss adjusting agent in the overcoat coating film is from 0.01 to 15 vol %,
• wherein a content of the matting agent in the overcoat coating film is from 0.01 to 15 vol %, and
• wherein the coated metal sheet satisfies the following equations:
• D197.5/T≤0.7
• Ru≤1.2T
• R≥1.0
• 5.0≤D297.5/T≤7.0
• 3≤T≤20
• wherein R (μm) is a number average particle diameter of the gloss adjusting agent, T (μm) is a film thickness of the overcoat coating film, D197.5 (μm) is a 97.5% particle diameter in an accumulated particle size distribution of the gloss adjusting agent based on the number of particles, D297.5 (μm) is a 97.5% particle diameter in an accumulated particle size distribution of the matting agent based on the number of particles, and Ru (μm) is an upper limit particle diameter in a number particle size distribution of the gloss adjusting agent.

A method for producing a coated metal sheet comprising a metal sheet and an overcoat coating film to be disposed on the metal sheet, comprising the steps of:

• applying an overcoat coating material containing a resin, a gloss adjusting agent, and a matting agent onto the metal sheet;
• and
• curing the coating film of the overcoat coating material to form the overcoat coating film;
• wherein a content of the gloss adjusting agent in the overcoat coating film is from 0.2 to 15 vol %, and a content of the matting agent in the overcoat coating film is from 0.2 to 15 vol %,
• wherein the gloss adjusting agent is particles having micropores, and the matting agent is primary particles, and
• wherein the gloss adjusting agent and the matting agent which satisfy the following equations are employed:
• D197.5/T≤0.7
• Ru≤1.2T
• R≥1.0
• 2.0≤D297.5/T≤7.0
• 13≤T≤20
• wherein R (μm) is a number average particle diameter of the gloss adjusting agent, T (μm) is a film thickness of the overcoat coating film, D197.5 (μm) is a 97.5% particle diameter in an accumulated particle size distribution of the gloss adjusting agent based on the number of particles, D297.5 (μm) is a 97.5% particle diameter in an accumulated particle size distribution of the matting agent based on the number of particles, and Ru (μm) is an upper limit particle diameter in a number particle size distribution of the gloss adjusting agent.

A method for producing a coated metal sheet comprising a metal sheet and an overcoat coating film to be disposed on the metal sheet, comprising the steps of:

• applying an overcoat coating material containing a resin, a gloss adjusting agent, and a matting agent onto the metal sheet;
• and
• curing the coating film of the overcoat coating material to form the overcoat coating film;
• wherein a content of the gloss adjusting agent in the overcoat coating film is from 0.01 to 15 vol %, and a content of the matting agent in the overcoat coating film is from 0.01 to 15 vol %,
• wherein the gloss adjusting agent is particles having micropores, and the matting agent is primary particles, and
• wherein the gloss adjusting agent and the matting agent which satisfy the following equations are employed:
• D197.5/T≤0.7
• Ru≤1.2T
• R≥1.0
• 5.0≤D297.5/T≤7.0
• 3≤T≤20
• wherein R (μm) is a number average particle diameter of the gloss adjusting agent, T (μm) is a film thickness of the overcoat coating film, D197.5 (μm) is a 97.5% particle diameter in an accumulated particle size distribution of the gloss adjusting agent based on the number of particles, D297.5 (μm) is a 97.5% particle diameter in an accumulated particle size distribution of the matting agent based on the number of particles, and Ru (μm) is an upper limit particle diameter in a number particle size distribution of the gloss adjusting agent.