Nisshin Steel Co., Ltd.

Nippon Steel Nisshin Co., Ltd.

Kenji Sakato

Taketo Hara

Kazuhiko Takahashi

Koichiro Ueda

Hirokazu Yano

Hiroki Yamaguchi

Provided is a coated metal sheet for exterior use, having a metal sheet, and a top coat film situated on the metal sheet. The top coat film contains a resin, 0.2-15 volume percent of a gloss control agent composed of porous particles, and a delustering agent composed of primary particles. The coated metal sheet satisfies the following expressions in which, in the number-size distribution of the gloss control agent and the delustering agent, R is the number-average particle diameter (&#x3bc;m) of the gloss control agent, D1and D2are 97.5% particle diameter values (&#x3bc;m) of the gloss control agent and the delustering agent, Ru is the upper limit particle diameter (&#x3bc;m) of the gloss control agent, and T is the film thickness (&#x3bc;m) of the top coat film.1&#x2264;0.7&#x2264;1.2&#x2265;1.02.0&#x2264;2&#x2264;7.013&#x2264;&#x2264;20.

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

This coated metal sheet for exterior covering has a metal sheet and a top coating layer disposed on the metal sheet, the top coating layer is configured from a fluororesin and contains a gloss control agent comprising 0.01-15 vol % of microporous particles and a matte agent comprising primary particles, and the coated metal sheet satisfies the belowmentioned formulae. In the number-based particle size distribution of the gloss control agent and the matte agent, R is the number average particle size (&#x3bc;m) of the gloss control agent, D1and D2represent the 97.5% particle size (&#x3bc;m) of the gloss control agent and the matte agent, Ru is the upper limit particle size (&#x3bc;m) of the gloss control agent, and T is the top coating layer thickness (&#x3bc;m).1&#x2264;0.9Ru&#x2264;1.2TR&#x2265;1.00.5&#x2264;2&#x2264;7.03&#x2264;T&#x2264;40.

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

The coated metal plate pertaining to the present invention is a coated metal plate for exterior use, and has a metal plate and a top coating film disposed on the metal plate. The top coating film contains 0.01-15 vol % of porous particles as a gloss adjusting agent, and the coated metal plate satisfies the expressions below. In the expressions below, R is the number-average particle diameter (&#x3bc;m), Dis the diameter (&#x3bc;m) of 97.5% of the particles, Ru is the upper limit particle diameter (&#x3bc;m), and T is the film thickness (&#x3bc;m) of the top coating film in the number particle size distribution of the gloss adjusting agent. D/T&#x2264;0.7; Ru&#x2264;1.2T; R&#x2265;1.0; 3&#x2264;T&#x2264;20.

This coated metal plate is a chromate-free coated metal plate for exterior applications, which comprises a metal plate and a coating film that is arranged on the metal plate. The coating film contains 0.2-15 vol % of porous particles as a gloss control agent, and contains 0.2-15 vol % of primary particles as a matting agent. If R1 (&#x3bc;m) is the number average particle diameter of the gloss control agent, R2 (&#x3bc;m) is the number average particle diameter of the matting agent, T (&#x3bc;m) is the film thickness of the coating film, &#x3c3;1 (&#x3bc;m) is the standard deviation of the number-based particle size distribution of the gloss control agent and &#x3c3;2 (&#x3bc;m) is the standard deviation of the number-based particle size distribution of the matting agent, the coated metal plate satisfies the following formulae.(1+2&#x3c3;1)/&#x2264;0.71&#x2265;2.02.0&#x2264;(2+2&#x3c3;2)/&#x2264;7.013&#x2264;&#x2264;20.

Coated metal plate and exterior building material

This coated metal plate is a chromate-free coated metal plate for exterior applications, which comprises a metal plate and a coating film that is arranged on the metal plate. The coating film contains 0.01-15% by volume of porous particles as a gloss control agent. If R (&#x3bc;m) is the number average particle diameter of the gloss control agent, T (&#x3bc;m) is the film thickness of the coating film, and &#x3c3; is the standard deviation of the number-based particle size distribution of the gloss control agent, the coated metal plate satisfies the following formulae. (R+2&#x3c3;)/T&#x2264;0.7 R&#x2265;2.0 9&#x2264;T&#x2264;19.

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Chiba, Japan

Kenji Sakato