| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated metal plate and an exterior building material having intended designability with modified glossiness and excellent flatness part corrosion resistance similar to or more than that of a coated metal plate containing a chromate rustproof treated metal plate even with chromate free.SOLUTION: The coated metal plate is a coated metal plate for exterior, has a metal plate and a top coating coated film placed on the metal plate and the top coating coated film consists of a fluorine resin and contains pore particles of 0.01 to 15 vol.% as a glossiness modifier and a matting agent as a primary particle and the coated metal plate satisfies the following formula. R is number-average particle diameter (μm) of the glossiness modifier, Dand D2are 97.5% particle diameter (μm) of the glossiness modifier and the matting agent, Ru is upper limit particle diameter (μm) of the glossiness modifier, and T is film thickness (μm) of the top coating coated film in a number particle size distribution of the glossiness modifier and the matting agent. D1/T≤0.9, Ru≤1.2T, R≥1.0, 0.5≤D2/T≤7.0, 3≤T≤40.SELECTED DRAWING: None |
