涂装金属板以及外装建材;COATED METAL PLATE AND EXTERIOR BUILDING MATERIAL

摘要

本发明的涂装金属板为外装用无铬酸盐的涂装金属板，且包含金属板与配置于所述金属板上的表层涂膜。所述表层涂膜含有0.2体积%~15体积%的细孔粒子作为光泽调整剂，且含有0.2体积%~15体积%的一次粒子作为消光剂。当将光泽调整剂的个数平均粒径设为R1(μm)，将消光剂的个数平均粒径设为R2(μm)，将表层涂膜的膜厚设为T(μm)，将光泽调整剂的个数粒度分布的标准偏差设为σ1(μm)，及将消光剂的个数粒度分布的标准偏差设为σ2(μm)时，所述涂装金属板满足下述式：(R1+2σ1)/T≦0.7 R1≧2.0 2.0≦(R2+2σ2)/T≦7.0 13≦T≦20。 A coated metal plate according to the invention is a chromate-free coated metal plate for exterior use, including a metal plate and a top coating film arranged on the metal plate. The top coating film contains 0.2 to 15 volume% of pore particles as a gloss adjusting agent, and 0.2 to 15 volume% of primary particles as a matting agent. When a number average particle diameter of the gloss adjusting agent is represented by R1 (μm), a number average particle diameter of the matting agent is represented by R2 (μm), a film thickness of the top coating film is represented by T (μm), a standard deviation of number particle size distribution of the gloss adjusting agent is represented by σ1 (μm), and a standard deviation of number particle size distribution of the matting agent is represented by σ2 (μm), the coated metal plate satisfies the following formulae: (R1+2σ1)/T ≦; R1 ≧; 2.0 ≦ (R2+2σ2)/T ≦; 13 ≦ T ≦