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公开(公告)号：EP4227087A1
公开(公告)日：2023-08-16
申请号：EP21891627.8
申请日：2021-10-22
Applicant: MAZDA MOTOR CORPORATION
Inventor： YAMANE Takakazu , OKAMOTO Keiichi , TERAMOTO Kouji , NONAKA Ryuji , TAMAI Kazuteru , KAWASE Eiichi , FUJIMOTO Tomohiro , NAKAMOTO Takayoshi
Abstract: A multilayer coating film includes a lustrous layer directly or indirectly formed on a surface of a coating target and containing a luster material, and a colored layer stacked on the lustrous layer, containing a reddish coloring agent, and having translucency. For the lustrous layer, when a light incident angle (an angle with respect to a line perpendicular to the surface of the lustrous layer) is 45° and L ∗ (θ) represents the L* value of the lightness index of reflected light measured at a light receiving angle (the angle of inclination toward a light source side from a specular reflection direction) θ, L ∗ (θ) at 45° ≤ θ ≤ 80° and 100° ≤ θ ≤ 110° is 10 or less, and when the luster material is projected onto the bottom surface of the lustrous layer, the percentage of the projected area of the luster material on the bottom surface is 3% or more to 70% or less per unit area.
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公开(公告)号：EP4227086A1
公开(公告)日：2023-08-16
申请号：EP21891626.0
申请日：2021-10-22
Applicant: MAZDA MOTOR CORPORATION
Inventor： YAMANE Takakazu , OKAMOTO Keiichi , TERAMOTO Kouji , NONAKA Ryuji , TAMAI Kazuteru , KAWASE Eiichi , FUJIMOTO Tomohiro , NAKAMOTO Takayoshi
Abstract: A multilayer coating film includes a lustrous layer directly or indirectly formed on a surface of a coating target and containing a luster material and a blackish coloring agent, and a colored layer stacked on the lustrous layer, containing a reddish coloring agent, and having translucency. A slope of a tangent of a spectrum of a spectral transmittance, defined as an absolute value, of the colored layer at the wavelength of 620 nm is 0.02 nm -1 or more and 0.06 nm -1 or less, the spectral transmittance being obtainable by dividing a spectral reflectance measured for the colored layer stacked on the lustrous layer at the light receiving angle of 15° in the case of the light incident angle of 45°, by a spectral reflectance measured for the lustrous layer from which the colored layer is removed and a surface of which is therefore exposed, at the light receiving angle of 15° in the case of the light incident angle of 45°.
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公开(公告)号：EP4223517A1
公开(公告)日：2023-08-09
申请号：EP21891625.2
申请日：2021-10-22
Applicant: MAZDA MOTOR CORPORATION
Inventor： YAMANE Takakazu , OKAMOTO Keiichi , TERAMOTO Kouji , NONAKA Ryuji , TAMAI Kazuteru , KAWASE Eiichi , FUJIMOTO Tomohiro , NAKAMOTO Takayoshi
Abstract: A multilayer coating film includes a lustrous layer directly or indirectly formed on a surface of a coating target and containing a luster material, and a colored layer stacked on the lustrous layer, containing a reddish coloring agent, and having translucency. Regarding a Y value of an XYZ colorimetric system calibrated with a standard white plate, when a light incident angle (an angle with respect to a line perpendicular to a surface of the lustrous layer) is 45°, Y(5°) represents a Y value of reflected light measured at a light receiving angle (the angle of inclination toward a light source side from a specular reflection direction) of 5°, and Y(15°) represents a Y value of reflected light measured at a light receiving angle of 15°, the lustrous layer satisfies the following: Y(5°) is 30 or more to 700 or less; Y(15°) = k × Y(5°) (where k is a coefficient); and k is 0.01 or more to 0.3 or less. The concentration of the reddish coloring agent in the colored layer is 1 mass% or more to 17 mass% or less.
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