Coated article and method for producing same

Abstract

Provided are a coated article having an excellent color depth sensation and a method for producing the same. A coated article having an object to be coated, and a multilayer coating film having a brilliant coating film containing a brilliant pigment, a colored coating film containing a colored pigment, and a clear coating film, in which the ratio (L * 15 / L * 110) of the lightness L * 15 to the lightness L * 110 is 5-9, inclusive, and the ratio (L * 15 / L * 110) of the lightness L * 15 to the lightness L * 110 is 5-9, inclusive. The lightness L * 15 is the lightness based on the spectral reflectance obtained by receiving light I45 irradiated from an angle of 45 degrees to the surface of the multilayer coating film at an angle of 15 degrees with respect to regular reflection light, and the lightness L * 110 is the lightness based on the spectral reflectance obtained by receiving the light I45 at an angle of 110 degrees with respect to regular reflection light; the ratio (C * 15 / C * 110) of the chroma C * 15, which is the chroma in an L * C * h color system based on the spectral reflectance obtained by receiving the light I45 at an angle of 15 degrees with respect to the regular reflection light, to the chroma C * 110, which is the chroma in the L * C * h color system based on the spectral reflectance obtained by receiving the light I45 at an angle of 110 degrees with respect to the regular reflection light, is from 8 to 12 (inclusive).

Description

Technical Field

[0001] The present invention relates to a coated article and a method for manufacturing the same. Background Art

[0002] In the field of industrial products such as automotive painting, rich colors and designability are required according to the preferences of users. As an example of such a design, a multilayer coating film in which a colored transparent coating film containing a coloring pigment is laminated on a coating film containing a brightening pigment and / or a coloring pigment (Patent Document 1) can be cited.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2014-042891 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] For such a multilayer coating film, the color and / or reflected light of the lower coating film can be visually confirmed through the colored transparent coating film provided on the upper layer, and thus the depth of color can be felt.

[0008] An object of the present invention is to provide a coated article having a further excellent sense of color depth and a method for manufacturing the same.

[0009] Solutions for Solving the Problems

[0010] To solve the above problems, the present invention provides the following mode.

[0011] [1] A coated article having a substrate and a multilayer coating film, wherein,

[0012] The multilayer coating film has:

[0013] A brightening coating film formed on the substrate and containing a brightening pigment,

[0014] A coloring coating film formed on the brightening coating film and containing a coloring pigment, and

[0015] A transparent coating film formed on the coloring coating film,

[0016] Lightness L * 15 The ratio (L * 110 / L * 15 ) is 5 or more and 9 or less, and the lightness L * 110 ) is 5 or more and 9 or less, and the lightness L * 15is based on the light I irradiated onto the surface of the multi-layer coating film at an angle of 45 degrees 45 The lightness of the spectral reflectance obtained by receiving at an angle of 15 degrees with respect to the specularly reflected light, the lightness L * 110 is based on the light I 45 The lightness of the spectral reflectance obtained by receiving at an angle of 110 degrees with respect to the specularly reflected light

[0017] Chroma C * 15 The ratio with chroma C * 110 (C * 15 / C * 110 ) is 8 or more and 12 or less, the chroma C * 15 is based on the light I 45 The L of the spectral reflectance obtained by receiving at an angle of 15 degrees with respect to the specularly reflected light * C * The chroma in the LCh color system, the chroma C * 110 is based on the light I 45 The L of the spectral reflectance obtained by receiving at an angle of 110 degrees with respect to the specularly reflected light * C * The chroma in the LCh color system

[0018] [2] The coated article according to the above [1], wherein the lightness GL * 15 The ratio with the lightness GL * 110 (GL * 15 / GL * 110 ) is 15 or more and 25 or less, the lightness GL * 15 is based on the light GI irradiated onto the surface of the glossy coating film at an angle of 45 degrees 45 The lightness of the spectral reflectance obtained by receiving at an angle of 15 degrees with respect to the specularly reflected light, the lightness GL * 110 is based on the light GI 45 The lightness of the spectral reflectance obtained by receiving at an angle of 110 degrees with respect to the specularly reflected light

[0019] Chroma GC * 15 The ratio with chroma GC * 110 (GC* 15 / GC * 110 ) is 15 or more and 35 or less, and the chroma GC * 15 is based on the spectral reflectance of the light GI 45 received at an angle of 15 degrees with respect to the specularly reflected light, and the L in the L * C * h color system, and the chroma GC * 110 is based on the spectral reflectance of the light GI 45 received at an angle of 110 degrees with respect to the specularly reflected light, and the L in the L * C * h color system.

[0020] [3] The coated article according to the above [1] or [2], wherein the thickness of the glossy coating film is 3 μm or more and 7 μm or less.

[0021] [4] The coated article according to any one of the above [1] to [3], wherein the glossy pigment contains flaky aluminum particles.

[0022] [5] The coated article according to the above [4], wherein

[0023] the average particle diameter of the flaky aluminum particles is 8 μm or more and 13 μm or less, and the thickness is 0.08 μm or more and 0.2 μm or less.

[0024] [6] The coated article according to any one of the above [1] to [5], wherein the glossy pigment contains vapor-deposited chromium oxide.

[0025] [7] A method for manufacturing a coated article, which has

[0026] a step of coating a glossy pigment dispersion containing a glossy pigment on an object to be coated to form an uncured glossy coating film,

[0027] a step of coating a colored coating containing a colored pigment on the uncured glossy coating film to form an uncured colored coating film,

[0028] a step of coating a transparent coating on the uncured colored coating film to form an uncured transparent coating film, and

[0029] a step of curing the uncured glossy coating film, the uncured colored coating film, and the uncured transparent coating film to obtain a multilayer coating film,

[0030] Brightness L * 15Ratio with lightness L * 110 is 5 or more and 9 or less (L * 15 / L * 110 ), and the lightness L * 15 is the lightness based on the spectral reflectance obtained by receiving light I irradiated on the surface of the multilayer coating film from an angle of 45 degrees 45 at an angle of 15 degrees with respect to the specularly reflected light. The lightness L * 110 is the lightness based on the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light.

[0031] Chroma C * 15 Ratio with chroma C * 110 is 8 or more and 12 or less (C * 15 / C * 110 ), and the chroma C * 15 is the chroma in the L 45 C * C * h color system based on the spectral reflectance obtained by receiving the light I * 110 at an angle of 15 degrees with respect to the specularly reflected light. The chroma C 45 is the chroma in the L * C * h color system based on the spectral reflectance obtained by receiving the light i

[0032] [8] The manufacturing method of the coated article according to [7] above, wherein the solid content ratio of the bright pigment dispersion is 16% by mass or more and 20% by mass or less.

[0033] [9] The manufacturing method of the coated article according to [7] or [8] above, wherein

[0034] the transparent coating is a two-component type coating containing a hydroxyl group-containing resin and a polyisocyanate compound.

[0035] Effects of the Invention

[0036] According to the present invention, a coated article having a particularly excellent sense of color depth and a manufacturing method thereof can be provided.

[0037] Brief Description of the Drawings

[0038] Figure 1 This is a diagram illustrating the light-receiving angle. Detailed implementation mode

[0039] [Coated article]

[0040] The "depth" of the color, in other words, for example, is the "color depth (depth)" or "three-dimensionality" of the color. If the brightness (lightness) and vividness (chroma) of the color change significantly depending on the viewing angle, the color depth or three-dimensionality of the color can be felt, and it can be felt as a dark color.

[0041] Lightness and chroma respectively represent the properties (attributes) of different colors. Generally speaking, if the lightness increases, the chroma decreases. That is, there is an inverse relationship between the change rate of lightness and the change rate of chroma.

[0042] The coated article of the present disclosure achieves a balance between a large lightness change rate and a large chroma change rate. The coated article of the present disclosure has an object to be coated and a multi-layer coating film. The multi-layer coating film has a brightening coating film formed on the object to be coated and containing brightening pigments, a coloring coating film formed on the brightening coating film and containing coloring pigments, and a transparent coating film formed on the coloring coating film. Based on the lightness L of the spectral reflectance obtained by receiving the light I irradiated on the surface of the multi-layer coating film at an angle of 45 degrees at an angle of 15 degrees with respect to the specularly reflected light 45 and the lightness L obtained thereby * 15 and the lightness L of the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light * 110 The ratio (L * 15 / L * 110 ) is 5 or more and 9 or less. Furthermore, based on the L of the spectral reflectance obtained by receiving the light I 45 at an angle of 15 degrees with respect to the specularly reflected light * C * The chroma C in the LCh color system * 15 and the L of the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light * C * The chroma C in the LCh color system * 110 The ratio (C * 15 / C * 110 ) is 8 or more and 12 or less. Thus, an excellent sense of color depth can be obtained.

[0043] (Brightness L * 15 、L * 110 )

[0044] In the present disclosure, the change rate of the brightness of the multilayer coating film is represented by the ratio of the brightness L * 15 to the brightness L * 110 (L * 15 / L * 110 ). In the present disclosure, L * 15 / L * 110 is 5 or more and 9 or less. L * 15 / L * 110 is in this range, which indicates that the brightness L changes greatly depending on the viewing angle.

[0045] Brightness L * 15 is the L 45 calculated from the spectral reflectance obtained by receiving the light I * C * incident on the multilayer coating film at an incident angle of 45° from the transparent coating film side at an angle of 15° with respect to its specularly reflected light in the L * Chroma color system. Brightness L * 110 is also the L 45 calculated from the spectral reflectance obtained by receiving the light I * C * incident on the multilayer coating film at an incident angle of 45° from the transparent coating film side at an angle of 110° with respect to its specularly reflected light in the L * Chroma color system.

[0046] In the L * C * Chroma color system, L * represents brightness, C * represents chroma, and h represents the hue angle. As the value of the brightness L * increases, the brightness of the measured substance increases, and as the value decreases, the darkness increases.

[0047] L * 15 / L * 110 can be 5.5 or more, can be 6 or more, can be 6.5 or more. L *15 / L * 110 It can be below 8.5, it can be below 8, it can be below 7.5.

[0048] L * C * h color system based on CIEL * a * b Color system (CIE1976L * a * b * Color space) calculation. CIE1976L * a * b * The color space can be obtained according to JIS Z 8781-4. CIEL * a * bThe color system is defined by the International Commission on Illumination and is described in Section 4.2 of CIE Publication 15.2 (1986). * 15 and lightness L * 110 For example, it can be obtained using a multi-angle colorimeter (for example, BYK-mac i, manufactured by BYK-Gardner).

[0049] The light receiving angle of 15° is the so-called high light condition. Compared with the shading and surface conditions, the brightness L * Easy to become higher. Lightness L * 15 It can be said that it indicates the brightness under conditions where brightness is more easily perceived. * 15 Considering that the rate of change of brightness is likely to be large, it can be 10 or more, or 15 or more. * 15 From the same viewpoint, it may be 30 or less, or 25 or less.

[0050] The light receiving angle of 110° is the so-called shading condition, and the brightness L * 110 It can be said that it indicates the brightness under conditions where it is more difficult to perceive brightness. * 110 From the same point of view, it can be 0 or more, or 2 or more. * 110 From the same viewpoint, it may be 6 or less, or 4 or less.

[0051] (Chroma * 15 , C *110 )

[0052] In the present disclosure, the chroma C * 15 and the chroma C * 110 ratio (C * 15 / C * 110 ) represents the change rate of the chroma of the multilayer coating film. In the present disclosure, C * 15 / C * 110 of the multilayer coating film is 8 or more and 12 or less. C * 15 / C * 110 is in this range, and it can be said that the chroma C changes greatly depending on the viewing angle.

[0053] The chroma C * 15 is calculated from the spectral reflectance obtained by receiving the light I incident on the multilayer coating film at an incident angle of 45° from the transparent coating film side 45 at an angle of 15° with respect to its specularly reflected light, and is the chroma C * in the L * C * h colorimetric system. The chroma C * 110 is also calculated from the spectral reflectance obtained by receiving the light I incident on the multilayer coating film at an incident angle of 45° from the transparent coating film side 45 at an angle of 110° with respect to its specularly reflected light, and is the chroma C * C * in the L * h colorimetric system.

[0054] In the L * C * h colorimetric system, the larger the chroma C * , the more vivid the color becomes, and as the chroma C * becomes smaller, the dullness increases.

[0055] C * 15 / C * 110 can be 8.5 or more and can be 9 or more. C * 15 / C * 110 can be 11 or less and can be 10 or less.

[0056] Considering that the change rate of the chroma easily becomes large, the chroma C* 15 It can be 35 or more, and can be 40 or more. From the same perspective, the chroma C * 15 can be 55 or less, and can be 50 or less.

[0057] From the same perspective, the chromaticity C * 110 can be 1 or more, and can be 3 or more. From the same perspective, the chromaticity C * 110 can be 9 or less, and can be 7 or less.

[0058] Figure 1 is a diagram illustrating the light-receiving angle. The light I irradiated onto the surface of the multilayer coating film at an angle of 45 degrees 45 has its specularly reflected light represented by R0. The light received at an angle of 15 degrees with respect to the specularly reflected light of the light I 45 is represented by R 15 . The lightness L 15 and the chroma C * 15 are calculated from the spectral reflectance of the light R * 15 . The light received at an angle of 110 degrees with respect to the specularly reflected light of the light I 45 is represented by R 110 . The lightness L 110 and the chroma C * 110 are calculated from the spectral reflectance of the light R * 110 .

[0059] (Particle feeling Si 15 )

[0060] To enhance the sense of color depth, it is desirable that the diffuse reflection of light based on the multilayer coating film is small. For example, light incident on the multilayer coating film at an incident angle of 15° is photographed from the normal direction of the multilayer coating film and analyzed using a specific image analysis algorithm, and the value obtained thereby (hereinafter referred to as particle feeling Si 15 .) is 4 or less, the sense of color depth is further enhanced. In the above image analysis algorithm, a histogram of brightness levels can be used.

[0061] Particle feeling Si 15 can be obtained using a multi-angle colorimeter (for example, BYK-maci, manufactured by BYK-Gardner). The Si 15 value is the average of the particle feelings Si 15 of 5 different specimens.

[0062] Particle feeling Si 15It can be 3.6 or less, and can be 3.3 or less. Particulate feeling Si 15 It can be 2.4 or more, and can be 2.7 or more.

[0063] (Object to be coated)

[0064] As the object to be coated, for example, at least a part of the body of a sedan, a truck, a bus, etc. can be cited. As the material of the object to be coated, for example, metals such as iron, copper, aluminum, tin, zinc or alloys containing them can be cited. The object to be coated can be plate-shaped or can have a three-dimensional shape. The coated article of the present disclosure constitutes at least a part of an automobile, for example.

[0065] The object to be coated can be degreased and / or surface-treated. As the surface treatment, for example, phosphate treatment, chromate treatment, zirconium conversion treatment, composite oxide treatment can be cited. After the surface treatment of the metal material, it can be undercoated with an electrodeposition coating. The electrodeposition coating can be cationic or anionic.

[0066] (Glossy coating film)

[0067] The glossy coating film contains a glossy pigment. The glossy coating film conceals the texture and color of the object to be coated, and imparts a metallic texture to the multi-layer coating film. The change rates of the lightness and chroma of the glossy coating film affect the change rates of the lightness and chroma of the multi-layer coating film. The glossy coating film is formed using a glossy pigment dispersion (X). The glossy pigment dispersion (X) will be described later.

[0068] <Lightness GL * 15 、GL * 110 >

[0069] The change rate of the lightness of the glossy coating film can be represented by using the ratio of lightness GL * 15 to lightness GL * 110 (GL * 15 / GL * 110 ).

[0070] Lightness GL * 15 is the lightness L calculated from the spectral reflectance obtained by receiving the light GI incident on the glossy coating film at an incident angle of 45° at an angle of 15° with respect to its specularly reflected light 45 in the L * C * h colorimetric system. Lightness GL * . Lightness GL * 110is also the L calculated from the spectral reflectance obtained by receiving light GI incident on the glossy coating film at an incident angle of 45° 45 at an angle of 110° with respect to its specularly reflected light * C * in the h color system * . The lightness GL * can be measured using a coated panel on which only the cured glossy coating film is disposed

[0071] The lightness GL of the glossy coating film * 15 The ratio (GL * 110 / GL * 15 ) is, for example, 15 or more and 25 or less. If GL * 110 / GL * 15 / GL * 110 is within this range, the change rate of the lightness of the multilayer coating film is likely to become larger

[0072] GL * 15 / GL * 110 can be 17 or more, can be 18 or more. GL * 15 / GL * 110 can be 24 or less, can be 23 or less

[0073] Considering that the change rate of lightness is likely to increase, the lightness GL * 15 can be 35 or more, can be 40 or more. From the same point of view, the lightness GL * 15 can be 55 or less, can be 50 or less

[0074] From the same point of view, the lightness GL * 110 can be 1 or more, can be 2 or more. From the same point of view, the lightness GL * 110 can be 11 or less, can be 9 or less

[0075] <The chroma GC * 15 、GC * 110 >

[0076] The change rate of the chroma of the glossy coating film can be determined using the chroma GC* 15 and the chroma GC * 110 ratio (C * 15 / C * 110 ).

[0077] The chroma GC * 15 is calculated from the spectral reflectance obtained by receiving the light GI incident on the glossy coating film at an incident angle of 45° 45 at an angle of 15° with respect to its specularly reflected light, and is the chroma C in the L * C * h color system * . The chroma GC * 110 is similarly calculated from the spectral reflectance obtained by receiving the light GI incident on the glossy coating film at an incident angle of 45° 45 at an angle of 110° with respect to its specularly reflected light, and is the chroma C in the L * C * h color system * . The chroma GC * can be measured using a coated plate on which only the cured glossy coating film is disposed on the object to be coated

[0078] GC * 15 / GC * 110 For example, it is 15 or more and 35 or less. If GC * 15 / GC * 110 is within this range, the change rate of the chroma of the multilayer coating film is likely to become larger

[0079] GC * 15 / GC * 110 can be 18 or more, can be 20 or more, can be 22 or more. GC * 15 / GC * 110 can be 32 or less, can be 30 or less, can be 27 or less

[0080] Considering that the change rate of the chroma is likely to increase, the chroma GC * 15 can be 15 or more, can be 20 or more. From the same point of view, the chroma GC * 15 can be 35 or less, can be 30 or less

[0081] From the same perspective, the chroma GC * 110 can be 0 or more, and can be 0.5 or more. From the same perspective, the chroma GC * 110 can be 2 or less, and can be 1.5 or less.

[0082] In particular, the lightness GL of the bright coating film * 15 and the lightness GL * 110 ratio (GL * 15 / GL * 110 ) can be 15 or more and 25 or less, and the chroma GC * 15 and the chroma GC * 110 ratio (GC * 15 / GC * 110 ) can be 5 or more and 35 or less.

[0083] <Hiding power>

[0084] The higher the hiding power of the bright coating film, the more the depth sense of the color can be improved. This is because the influence of the color of the substrate (coated object) becomes smaller.

[0085] The hiding power of the bright coating film can be evaluated using the black-and-white hiding film thickness, for example. The black-and-white hiding film thickness can be measured using a hiding rate test paper according to JIS K 5600-4-1(b). On the 2×2 cm square black-and-white grid pattern of the hiding rate measurement paper, the bright pigment dispersion is spray-coated in such a way as to form a gradient of the dry film thickness, and then heated and cured. Then, by visual inspection, the film part where the black-and-white grid pattern cannot be seen through is determined, and the film thickness of this part is measured. The measured film thickness is the black-and-white hiding film thickness. It can be said that the smaller the black-and-white hiding film thickness, the higher the hiding power.

[0086] The black-and-white hiding film thickness of the bright coating film can be 9 μm or less, can be 7 μm or less, and can be 6 μm or less. In this case, it can be said that the bright coating film has high hiding power.

[0087] <Light transmittance>

[0088] The desired light transmittance is low. The light resistance of an electrodeposited coating film usually formed on a metallic object to be coated is low. The light transmittance of a bright coating film is low, whereby the amount of light reaching the electrodeposited coating film can be reduced, and the deterioration of the electrodeposited coating film can be suppressed. Thereby, peeling at the interface between the bright coating film and the electrodeposited coating film can be suppressed.

[0089] The transmittance of light with a wavelength of 400 to 700 nm of the bright coating film can be 0.25% or less, can be 0.15% or less, and can be 0.10% or less. In this case, it can be said that the bright coating film has a low light transmittance. At any wavelength in the range of 400 to 700 nm, the light transmittance can be 0.15% or less.

[0090] The light transmittance of the bright coating film can be measured as follows: For a film formed from a bright pigment dispersion (cured bright coating film monomer), using a spectrophotometer (U-3310 manufactured by Hitachi, Ltd.), light with a wavelength of 400 to 700 nm is irradiated, and the measurement is performed every 10 nm.

[0091] <Bright pigment>

[0092] The bright pigment is not particularly limited as long as it reflects light.

[0093] As the bright pigment, for example, metal particles can be cited. Specifically, particles of aluminum, copper, zinc, iron, nickel, tin, aluminum oxide, chromium oxide, and alloys containing them can be cited. They can be used alone, or two or more of them can be used in combination. The bright pigment can also be colored.

[0094] From the viewpoint of easily suppressing diffuse reflection, it can be a scaly bright pigment, and can be scaly metal particles. The aspect ratio of the scaly bright pigment is, for example, 2 or more. The aspect ratio is the ratio of the major axis of one main surface of the scaly bright pigment to the distance (thickness) between the two main surfaces of the scaly bright pigment (major axis / thickness). The aspect ratio of the scaly bright pigment can be 10 or more and 1000 or less.

[0095] The bright coating film can also contain, in addition to the scaly bright pigment, other bright pigments (bright pigments with an aspect ratio of less than 2) other than the scaly bright pigment. However, the content of the other bright pigments can be 10% by mass or less, and can be 5% by mass or less, based on all the bright pigments.

[0096] From the viewpoint of obtaining a high bright feeling with a small amount, it can be scaly aluminum particles, and can be scaly chromium oxide (evaporated chromium oxide) obtained by pulverizing after film formation by the evaporation method.

[0097] Scaly aluminum particles can be used in combination with vapor-deposited chromium oxide. In this case, the mixing ratio can be scaly aluminum particles / vapor-deposited chromium oxide = 99 / 1 to 90 / 10 on a mass basis.

[0098] Considering that the glossiness is easily improved, the average particle size of the scaly aluminum particles can be 8 μm or more and 13 μm or less. The average particle size of the scaly aluminum particles can be 8.2 μm or more, and can be 8.5 μm or more. The average particle size of the scaly aluminum particles can be 12.8 μm or less, and can be 12.5 μm or less.

[0099] The average particle size refers to the volume average particle size D50. The volume average particle size D50 is the 50% average particle size (D50) in the volume-based particle size distribution measured by a particle size distribution measuring device using the laser diffraction / scattering method (for example, manufactured by Nikkiso Co., Ltd., "MICROTRAC UPA150").

[0100] The thickness of the scaly aluminum particles can be 0.08 μm or more and 0.2 μm or less. Thereby, the thickness of the glossy coating film can be made thinner, and the glossiness can be further improved. The thickness of the scaly aluminum particles can be 0.09 μm or more, and can be 0.1 μm or more. The thickness of the scaly aluminum particles can be 0.19 μm or less, and can be 0.18 μm or less.

[0101] The thickness of the scaly glossy pigment can also be calculated by observing the cross-section in the thickness direction of the multilayer coating film with an electron microscope. In the observation field of view, the area corresponding to the glossy pigment and the area other than that are binarized using image processing software. Then, 20 glossy pigments are arbitrarily selected, and the length of the thickest part of each is measured. The average value of these measured values is the thickness of the scaly glossy pigment.

[0102] The average particle size of the scaly aluminum particles can be 8 μm or more and 13 μm or less, and the thickness can be 0.08 μm or more and 0.2 μm or less.

[0103] The average particle size of the vapor-deposited chromium oxide can be 10 μm or more and 20 μm or less. The average particle size of the vapor-deposited chromium oxide can be 11.0 μm or more, and can be 12.0 μm or more. The average particle size of the vapor-deposited chromium oxide can be 19.0 μm or less, and can be 16.0 μm or less.

[0104] The thickness of the vapor-deposited chromium oxide can be 0.01 μm or more and 0.3 μm or less. The thickness of the vapor-deposited chromium oxide can be 0.012 μm or more, and can be 0.013 μm or more. The thickness of the vapor-deposited chromium oxide can be 0.28 μm or less, and can be 0.25 μm or less.

[0105] <Thickness>

[0106] The thickness of the brightening coating film can be 3 μm or more and 7 μm or less. Thereby, the orientation of the brightening pigment can be improved. The thickness of the brightening coating film can be 3.5 μm or more and can be 4 μm or more. The thickness of the brightening coating film can be 6.5 μm or less and can be 6 μm or less. The thickness of the brightening coating film is the thickness after drying or curing.

[0107] The thickness of the coating film is measured, for example, using an electromagnetic film thickness gauge. The thickness of the brightening coating film is the average value of the thicknesses of the brightening coating films of 5 different specimens. The thicknesses of other layers can also be measured and calculated in the same manner.

[0108] (Colored coating film)

[0109] The colored coating film contains a coloring pigment. The colored coating film imparts the desired color to the coated article. The colored coating film is formed using a coloring paint (Y). The coloring paint (Y) will be described later.

[0110] <Coloring pigment>

[0111] Examples of the coloring pigment include organic coloring pigments such as azo chelate pigments, insoluble azo pigments, condensed azo pigments, diketopyrrolopyrrole pigments, benzimidazolone pigments, phthalocyanine pigments, indigo pigments, perinone pigments, perylene pigments, dioxane pigments, quinacridone pigments, isoindolinone pigments, and metal complex pigments; and inorganic coloring pigments such as chrome yellow, yellow iron oxide, iron oxide, carbon black, and titanium dioxide. They can be used alone or in combination of two or more.

[0112] From the viewpoint of hiding power, the primary particle size of the coloring pigment can be 10 nm or more and 300 nm or less. The primary particle size of the coloring pigment can be 30 nm or more. The primary particle size of the coloring pigment can be 100 nm or less. The primary particle size can be measured based on an electron microscope image of the cross-section of the multilayer coating film using image processing software.

[0113] <Thickness>

[0114] The thickness of the colored coating film is, for example, 4 μm or more and 20 μm or less. The thickness of the colored coating film can be 6 μm or more and can be 8 μm or more. The thickness of the colored coating film can be 17 μm or less and can be 15 μm or less.

[0115] (Transparent coating film)

[0116] The transparent coating film protects the brightening coating film and the colored coating film. The transparent coating film is not particularly limited and has the same constitution as the conventionally known transparent coating film. The transparent coating film is formed using a transparent paint (Z). The transparent paint (Z) will be described later.

[0117] <Thickness>

[0118] From the viewpoint of improving scratch resistance and preventing the loss of the depth of color, the thickness of the transparent coating film can be 10 μm or more and 50 μm or less. The thickness of the transparent coating film can be 15 μm or more. The thickness of the transparent coating film can be 40 μm or less.

[0119] [Method for manufacturing a coated article]

[0120] The coated article of the present disclosure can be manufactured by successively forming a bright coating film, a colored coating film, and a transparent coating film on a substrate. When forming the colored coating film, the bright coating film may be cured or uncured. When forming the transparent coating film, the colored coating film may be cured or uncured. Among them, from the viewpoint of further improving the depth of color, it is preferable to laminate the three uncured coating films without curing each coating film and then heat them to simultaneously cure the three uncured coating films. According to this method, productivity, adhesion, and water resistance can also be improved.

[0121] The coated article of the present disclosure is manufactured, for example, by the following method, which includes: a step of coating a bright pigment dispersion (X) on a substrate to form an uncured bright coating film; a step of coating a colored paint on the uncured bright coating film to form an uncured colored coating film; a step of coating a transparent paint on the uncured colored coating film to form an uncured transparent coating film; and a step of curing the uncured colored coating film, the uncured bright coating film, and the uncured transparent coating film to obtain a multilayer coating film.

[0122] The L of the formed multilayer coating film * 15 / L * 110 is 5 or more and 9 or less, and C * 15 / C * 110 is 8 or more and 12 or less.

[0123] (1) Step of forming an uncured bright coating film

[0124] Coat a bright pigment dispersion (X) on a substrate to form an uncured bright coating film.

[0125] As a coating method, for example, air spray coating, airless spray coating, rotary atomization coating, and curtain coating can be cited. These methods can also be combined with electrostatic coating. Among them, from the viewpoint of coating efficiency, rotary atomization electrostatic coating is preferred. In rotary atomization electrostatic coating, for example, a rotary atomization electrostatic coater generally called "mikuro·mikuro bell (μμ bell)", "micro bell (μ bell)", "metallic bell (meta bell)" can be used.

[0126] The brightening pigment dispersion (X) is coated, for example, in such a manner that the thickness of the brightening coating film in the obtained multilayer coating film becomes 3 μm or more and 7 μm or less.

[0127] After coating the brightening pigment dispersion (X), pre-drying can also be performed. Thereby, the fluidity of the brightening coating film rapidly decreases, and the flow of the brightening pigment is easily suppressed. Furthermore, through pre-drying, it is possible to suppress the mixing of the uncured brightening coating film and the colored coating (Y) coated thereon, and it is difficult to form a mixed layer. Therefore, the appearance of the obtained multilayer coating film can be improved.

[0128] As pre-drying, for example, a method of leaving for 15 minutes or more and 30 minutes or less under a temperature condition of 20 °C or more and 25 °C or less, or a method of heating for 30 seconds or more and 10 minutes or less under a temperature condition of 50 °C or more and 100 °C or less can be cited.

[0129] (Brightening pigment dispersion (X))

[0130] The brightening coating film is formed using the brightening pigment dispersion (X). The brightening pigment dispersion (X) can be water-based or solvent-based. Water-based means that the proportion of water in all solvents is 50% by mass or more. Solvent-based means that the proportion of organic solvents in all solvents is 50% by mass or more.

[0131] The brightening pigment dispersion (X) contains the above-mentioned brightening pigment. As needed, the brightening pigment dispersion (X) contains a resin component, a solvent, and the like. The brightening pigment dispersion (X) can be prepared by diluting a mixture of the brightening pigment, and further a resin component and various additives with a solvent.

[0132] The viscosity of the brightening pigment dispersion (X) measured by a B-type viscometer at 20 °C can be, for example, 3000 cps / 6 rpm or more and 15000 cps / 6 rpm or less.

[0133] The solid content ratio of the brightening pigment dispersion (X) affects the discharge amount of the coating composition during coating. If the discharge amount changes, the size of the droplets of the coating composition also changes, which affects the orientation of the brightening pigment. From the perspective of easily achieving GL *15 / GL * 110 Adjust to be above 15 and below 25, and adjust GC * 15 / GC * 110 Considering the adjustment to be above 15 and below 35, the solid content ratio of the brightening pigment dispersion (X) can be 16% by mass or more and 20% by mass or less. Thus, it is particularly easy to adjust GL * 15 / GL * 110 Adjust to be above 15 and below 25. The solid content ratio of the brightening pigment dispersion (X) can be 16.5% by mass or more, and can be 17% by mass or more. The solid content ratio of the brightening pigment dispersion (X) can be 19.5% by mass or less, and can be 19% by mass or less. The solid content of the brightening pigment dispersion (X) is all components obtained by removing the solvent from the brightening pigment dispersion (X).

[0134] The PWC (pigment mass concentration) of the brightening pigment can be 5.0% by mass or more and 25.0% by mass or less. The PWC of the brightening pigment can be 7.0% by mass or more, and can be 10.0% by mass or more. The PWC of the brightening pigment can be 23.0% by mass or less, can be 20.0% by mass or less, and can be 15.0% by mass or less.

[0135] PWC (pigment mass concentration) is the mass ratio of the pigment to the total mass of the solid component mass of the resin contained in the coating and the target pigment (the brightening pigment in the above case). The solid component of the resin refers to the solid component of the resin component contained in the coating (refer to the following).

[0136] · Resin component

[0137] The brightening pigment dispersion (X) can contain a resin component. As the resin component, for example, a thermosetting resin can be cited. As the resin component, a curing agent can further be included.

[0138] The content of the resin component can be, for example, 30% by mass or more and 75% by mass or less of all the solid components of the brightening pigment dispersion (X). The above content of the resin component can be 35% by mass or more, and can be 40% by mass or more. The above content of the resin component can be 70% by mass or less, and can be 66% by mass or less.

[0139] The thermosetting resin can be formed by using, for example, a crosslinkable functional group and a base resin. As the crosslinkable functional group, for example, a carboxyl group, a hydroxyl group, an epoxy group, a silanol group, and a (meth)acryloyl group can be cited.

[0140] As the base resin, for example, acrylic resins, polyester resins, alkyd resins, polyurethane resins, epoxy resins, and fluororesins can be mentioned. The epoxy resin can be a polyurethane-modified epoxy resin. The polyester resin can be a polyurethane-modified polyester resin. The acrylic resin can be a polyurethane-modified acrylic resin. Each polyurethane-modified resin has a urethane bond in the resin skeleton. They can be used alone, or two or more of them can be used in combination. Among them, from the viewpoint of improving chip resistance, it can be an acrylic resin and a polyurethane-modified polyester.

[0141] The acrylic resin can be obtained, for example, by copolymerizing an α,β-ethylenically unsaturated carboxylic acid, a (meth)acrylate having a functional group such as a hydroxyl group, an amide group, or a hydroxymethyl group, and other (meth)acrylates, and styrene.

[0142] The polyurethane-modified polyester can be obtained by the reaction of a hydroxyl group-containing polyester with an aliphatic diisocyanate compound. The hydroxyl group-containing polyester can be prepared by polycondensing an acid component such as a polycarboxylic acid and / or an acid anhydride with a polyol. As the aliphatic diisocyanate compound, for example, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, cyclohexane-1,4-diisocyanate, dicyclohexylmethane-4,4-diisocyanate, and methylcyclohexane diisocyanate can be mentioned.

[0143] When water is used as the solvent, a thermosetting resin having a hydrophilic group can also be used. By neutralizing the hydrophilic group of the thermosetting resin and forming an alkali salt, the thermosetting resin is solubilized or dispersed in water. As the hydrophilic group, for example, a carboxyl group, a hydroxyl group, a hydroxymethyl group, an amino group, a sulfonic acid group, and a polyoxyethylene bond can be mentioned. As the neutralizing agent, for example, basic substances such as sodium hydroxide and amine compounds can be mentioned.

[0144] The thermosetting resin can be prepared in a state of being dispersed in water by subjecting the raw material monomers of the thermosetting resin to emulsion polymerization in the presence of a surfactant and a water-soluble resin. Alternatively, the thermosetting resin can be dispersed in water using an emulsifier. In these cases, the thermosetting resin may not contain a hydrophilic group, or may contain a small amount of a hydrophilic group.

[0145] As the curing agent, for example, amino resins, urea resins, polyisocyanate compounds, epoxy group-containing compounds, carboxyl group-containing compounds, carbodiimide group-containing compounds, hydrazide group-containing compounds, and semicarbazide group-containing compounds can be mentioned. The polyisocyanate compound includes a blocked polyisocyanate compound in which the isocyanate group is blocked by a blocking agent. They can be used alone, or two or more of them can be used in combination. Among them, from the aspects of various properties and cost of the obtained coating film, it can be an amino resin and / or a polyisocyanate compound.

[0146] An amino resin can be obtained, for example, by condensing an amino compound such as melamine, benzoguanamine, or urea with formaldehyde and then etherifying it with a lower monohydric alcohol. Details of the polyisocyanate compound will be described later.

[0147] The content of the curing agent is not particularly limited. From the viewpoint of curability, the solid component mass of the curing agent can be 10% by mass or more and 40% by mass or less of the total mass of the solid component mass of the thermosetting resin and the solid component mass of the curing agent. The above solid component mass of the curing agent can be 15% by mass or more. The above solid component mass of the curing agent can be 30% by mass or less, and can be 25% by mass or less.

[0148] The content of the thermosetting resin is not particularly limited. When a curing agent is contained, the solid component mass of the thermosetting resin can be 60% by mass or more and 90% by mass or less of the total mass of the solid component mass of the thermosetting resin and the solid component mass of the curing agent. The above solid component mass of the thermosetting resin can be 70% by mass or more. The above solid component mass of the thermosetting resin can be 85% by mass or less.

[0149] · Solvent

[0150] The solvent can be water (deionized water), can be an organic solvent, or can be a combination thereof. Among them, from the viewpoint of low VOC (Volatile Organic Compounds), it can be water. That is, the bright pigment dispersion (X) can be aqueous. In the aqueous bright pigment dispersion (X), the proportion of water in the solvent is 50% by mass or more, and can be 80% by mass or more.

[0151] As the organic solvent, for example, ester solvents such as ethyl acetate, butyl acetate, isopropyl acetate, ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate can be cited;

[0152] ether solvents such as propylene glycol monomethyl ether, ethylene glycol monomethyl ether, methyl methoxybutanol, ethoxypropanol, ethylene glycol isopropyl ether, ethylene glycol - tert - butyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, methoxybutanol, and propylene glycol monobutyl ether; alcohol solvents such as methanol, ethanol, butanol, and propanol; ketone solvents such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; aliphatic hydrocarbon solvents such as Swazol, Shellsol, and mineral spirits; aromatic solvents such as xylene, toluene, Solvesso - 100 (S - 100), and Solvesso - 150 (S - 150). They can be used alone, or two or more of them can be used in combination.

[0153] A solvent is added so that the solid content of, for example, the bright pigment dispersion (X) is 16% by mass or more and 20% by mass or less.

[0154] · Other pigments

[0155] Depending on properties such as hiding power, the bright pigment dispersion (X) may contain pigments other than the bright pigment. Examples of other pigments include rust-preventive pigments, coloring pigments, and extender pigments. Examples of coloring pigments include the same pigments as those exemplified for the coloring pigments used in the colored coating film. Examples of extender pigments include calcium carbonate, barium sulfate, clay, and talc. They can be used alone or in combination of two or more.

[0156] · Additives

[0157] As needed, the bright pigment dispersion (X) may contain various additives. Examples of additives include ultraviolet absorbers, antioxidants, defoamers, viscosity regulators, anti-settling agents, dispersants, surface regulators, and anti-pinhole agents. They can be used alone or in combination of two or more.

[0158] (2) Step of forming an uncured colored coating film

[0159] A colored coating (Y) is applied onto the uncured bright coating film to form an uncured colored coating film.

[0160] The colored coating (Y) is applied, for example, such that the thickness of the cured colored coating film becomes 5 μm or more and 15 μm or less.

[0161] As the coating method, for example, the same method as the coating method of the bright pigment dispersion (X) can be used. Among them, from the viewpoint of coating efficiency, rotary atomization electrostatic coating is preferred.

[0162] After applying the colored coating (Y), pre-drying (also called preheating) can also be performed. Thereby, in the curing step, the sudden boiling of the solvent contained in the colored coating film can be suppressed, and the generation of boiling can be easily suppressed. The conditions for pre-drying are not particularly limited and can be the same as those for pre-drying the bright pigment dispersion (X).

[0163] (Colored coating (Y))

[0164] The colored coating film is formed using the colored coating (Y). The colored coating (Y) can be water-based or solvent-based. The colored coating (Y) can be a one-component type coating or a multi-component type coating such as a two-component type coating.

[0165] The colored coating (Y) contains the above-described coloring pigment. The colored coating (Y) optionally contains a resin component, a solvent, and the like. The colored coating (Y) is prepared by diluting a mixture of the coloring pigment, and further the resin component and various additives, etc. with a solvent.

[0166] The viscosity of the colored coating (Y) measured by a B-type viscometer at 20°C can be, for example, 500 cps / 6 rpm or more and 6000 cps / 6 rpm or less.

[0167] The solid content ratio of the colored coating (Y) can be 10% by mass or more and 40% by mass or less. The solid components of the colored coating (Y) are all the components remaining after removing the solvent from the colored coating (Y).

[0168] The PWC of the coloring pigment can be, for example, 50% by mass or less and 0.1% by mass or more. The PWC of the coloring pigment can be 20% by mass or less.

[0169] · Resin component

[0170] The colored coating (Y) can contain a resin component. As the resin component, for example, the same components as those exemplified for the resin component of the brightening pigment dispersion (X) can be cited (representatively, thermosetting resins and curing agents).

[0171] The content of the resin component can be, for example, 50% by mass or more and 95% by mass or less of all the solid components of the colored coating (Y). The above content of the resin component can be 60% by mass or more, and can be 65% by mass or more. The above content of the resin component can be 90% by mass or less, and can be 85% by mass or less.

[0172] · Solvent

[0173] The solvent can be water (deionized water), can be an organic solvent, or can be a combination thereof. Among them, from the viewpoint of low VOC, it can be water. That is, the colored coating (Y) can be aqueous. In the aqueous colored coating (Y), the proportion of water in the solvent is 50% by mass or more, and can be 80% by mass or more. As the organic solvent, the same organic solvents as those exemplified for the organic solvent of the brightening pigment dispersion (X) can be cited.

[0174] · Other pigments

[0175] The colored coating (Y) can further contain other pigments depending on the hiding power, etc. As the other pigments, for example, anti-rust pigments and the above-described extender pigments can be cited. They can be used alone as one kind, or two or more kinds can be used in combination.

[0176] · Additives

[0177] As needed, the coloring paint (Y) may contain various additives. As additives, substances exemplified as additives for the brightening pigment dispersion (X) can be cited as the same additives.

[0178] (3) Step of forming an uncured transparent coating film

[0179] A transparent paint (Z) is applied onto the uncured colored coating film to form an uncured transparent coating film.

[0180] As a coating method, for example, the same method as the coating method of the coloring paint can be cited. Among them, from the viewpoint of coating efficiency, rotary atomization electrostatic coating is preferred.

[0181] The transparent paint (Z) is applied, for example, in such a manner that the thickness of the cured transparent coating film becomes 25 μm or more and 45 μm or less.

[0182] (Transparent paint (Z))

[0183] The transparent coating film can be formed using the transparent paint (Z). The transparent paint (Z) can be a powder, can be water-based, or can be solvent-based. The transparent paint (Z) can be a one-component type paint or a multi-component type paint such as a two-component type paint. From the viewpoint that the physical properties of the coating film are easily improved, the transparent paint (Z) can be a two-component type.

[0184] The transparent paint (Z) contains a resin component. The transparent paint (Z) contains a solvent as needed. The transparent paint (Z) can be prepared by diluting a mixture of the resin component, and further various additives, etc. with a solvent.

[0185] The viscosity of the transparent paint (Z) measured with a B-type viscometer at 20°C can be, for example, 500 cps / 6 rpm or more and 6000 cps / 6 rpm or less.

[0186] The solid content ratio of the transparent paint (Z) can be, for example, 40 mass% or more and 60 mass% or less. The solid content of the transparent paint (Z) is all components after removing the solvent from the transparent paint (Z).

[0187] · Resin component

[0188] The transparent paint (Z) contains a resin component. As the resin component, for example, components exemplified as the resin component of the brightening pigment dispersion (X) can be cited as the same components. The transparent paint (Z) can contain a thermosetting resin and a curing agent as the resin component. Such a transparent paint (Z) is a so-called two-component type paint.

[0189] From the viewpoint of easily improving the physical properties of the coating film, the two-component type transparent coating (Z) may contain a hydroxyl group-containing resin as a thermosetting resin and a polyisocyanate compound as a curing agent.

[0190] As the hydroxyl group-containing resin, specifically, a hydroxyl group-containing acrylic resin, a hydroxyl group-containing polyester resin, a hydroxyl group-containing polyether resin, and a hydroxyl group-containing polyurethane resin can be cited. They can be used alone, or two or more of them can be used in combination. Among them, it can be a hydroxyl group-containing acrylic resin and a hydroxyl group-containing polyester resin, or it can be a hydroxyl group-containing acrylic resin.

[0191] The hydroxyl value of the hydroxyl group-containing acrylic resin can be, for example, 80 mgKOH / g or more and 200 mgKOH / g or less. Thereby, the abrasion resistance and water resistance of the obtained coating film can be improved. The hydroxyl value of the hydroxyl group-containing acrylic resin can be 100 mgKOH / g or more. The hydroxyl value of the hydroxyl group-containing acrylic resin can be 180 mgKOH / g or less.

[0192] The weight average molecular weight of the hydroxyl group-containing acrylic resin can be 2500 or more and 40000 or less. Thereby, the acid resistance and smoothness of the obtained coating film can be improved. The weight average molecular weight of the hydroxyl group-containing acrylic resin can be 5000 or more. The weight average molecular weight of the hydroxyl group-containing acrylic resin can be 30000 or less.

[0193] The weight average molecular weight can be calculated based on the chromatogram measured by gel permeation chromatography, with the molecular weight of standard polystyrene as a reference. As the gel permeation chromatography, for example, HLC8120GPC (manufactured by Tosoh Corporation) can be used. As the chromatographic column, TSKgelG-4000HXL, TSKgelG-3000HXL, TSKgelG-2500HXL, and TSKgelG-2000HXL (all manufactured by Tosoh Corporation) can be used. The chromatography is carried out, for example, using tetrahydrofuran as the mobile phase, using a differential refractive index detector (RI) as the detector, at a measurement temperature of 40 °C and a flow rate of 1 cc / minute.

[0194] The polyisocyanate compound has at least two isocyanate groups in one molecule. As the polyisocyanate compound, for example, an aliphatic polyisocyanate, an alicyclic polyisocyanate, an aliphatic polyisocyanate having an aromatic ring not bonded to the isocyanate group in the molecule (aromatic aliphatic polyisocyanate), an aromatic polyisocyanate, and derivatives of these polyisocyanates can be cited. They can be used alone, or two or more of them can be used in combination.

[0195] As aliphatic polyisocyanates, for example, there can be mentioned aliphatic diisocyanates such as trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, pentamethylene diisocyanate, 1,2-propylene diisocyanate, 1,2-butylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate, 2,4,4- or 2,2,4-trimethylhexamethylene diisocyanate, dimer acid diisocyanate, methyl 2,6-diisocyanatohexanoate (common name: lysine diisocyanate), etc.; aliphatic triisocyanates such as 2-isocyanatoethyl 2,6-diisocyanatohexanoate, 1,6-diisocyanato-3-isocyanatomethylhexane, 1,4,8-triisocyanatooctane, 1,6,11-triisocyanatoundecane, 1,8-diisocyanato-4-isocyanatomethyloctane, 1,3,6-triisocyanatohexane, 2,5,7-trimethyl-1,8-diisocyanato-5-isocyanatomethyloctane, etc.

[0196] As alicyclic polyisocyanates, for example, there can be mentioned alicyclic diisocyanates such as 1,3-cyclopentene diisocyanate, 1,4-cyclohexane diisocyanate, 1,3-cyclohexane diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate (common name: isophorone diisocyanate), 4-methyl-1,3-cyclohexylene diisocyanate (common name: hydrogenated TDI), 2-methyl-1,3-cyclohexylene diisocyanate, 1,3- or 1,4-bis(isocyanatomethyl)cyclohexane (common name: hydrogenated xylylene diisocyanate) or a mixture thereof, methylene bis(4,1-cyclohexylene) diisocyanate (common name: hydrogenated MDI), norbornane diisocyanate, 4,4'-methylenebis(cyclohexyl isocyanate), etc.; alicyclic triisocyanates such as 1,3,5-triisocyanatocyclohexane, 1,3,5-trimethylisocyanatocyclohexane, 2-(3-isocyanatopropyl)-2,5-bis(isocyanatomethyl)-bicyclo(2.2.1)heptane, 2-(3-isocyanatopropyl)-2,6-bis(isocyanatomethyl)-bicyclo(2.2.1)heptane, 3-(3-isocyanatopropyl)-2,5-bis(isocyanatomethyl)-bicyclo(2.2.1)heptane, 5-(2-isocyanatoethyl)-2-isocyanatomethyl-3-(3-isocyanatopropyl)-bicyclo(2.2.1)heptane, 6-(2-isocyanatoethyl)-2-isocyanatomethyl-3-(3-isocyanatopropyl)-bicyclo(2.2.1)heptane, 5-(2-isocyanatoethyl)-2-isocyanatomethyl-2-(3-isocyanatopropyl)-bicyclo(2.2.1)-heptane, 6-(2-isocyanatoethyl)-2-isocyanatomethyl-2-(3-isocyanatopropyl)-bicyclo(2.2.1)heptane, etc.

[0197] As the aromatic aliphatic polyisocyanate, for example, there can be cited aromatic aliphatic diisocyanates such as methylene bis(4,1-phenylene) diisocyanate (common name: MDI), 1,3- or 1,4-xylene diisocyanate or a mixture thereof, ω,ω'-diisocyanato-1,4-diethylbenzene, 1,3- or 1,4-bis(1-isocyanato-1-methylethyl)benzene (common name: tetramethylxylylene diisocyanate) or a mixture thereof; aromatic aliphatic triisocyanates such as 1,3,5-triisocyanatomethylbenzene.

[0198] As the aromatic polyisocyanate, for example, there can be cited aromatic diisocyanates such as m-phenylene diisocyanate, p-phenylene diisocyanate, 4,4'-diphenyl diisocyanate, 1,5-naphthalene diisocyanate, 2,4-toluene diisocyanate (common name: 2,4-TDI) or 2,6-toluene diisocyanate (common name: 2,6-TDI) or a mixture thereof, 4,4'-toluidine diisocyanate, 4,4'-diphenyl ether diisocyanate; aromatic triisocyanates such as triphenylmethane-4,4′,4″-triisocyanate, 1,3,5-triisocyanatobenzene, 2,4,6-triisocyanatotoluene; aromatic tetraisocyanates such as 4,4'-diphenylmethane-2,2’,5,5’-tetraisocyanate.

[0199] As the derivative of the polyisocyanate, for example, there can be cited dimers, trimers, biurets, allophanates, 1,3-diazetidine-2,4-diones (uretdiones), uretimines, isocyanurates, oxadiazinetriones, polymethylene polyphenyl polyisocyanates (crude MDI, polymeric MDI), crude TDI of the above-mentioned polyisocyanates.

[0200] From the viewpoints of adhesion and compatibility, etc., it can be hexamethylene diisocyanate, 4,4'-methylene bis(cyclohexyl isocyanate), and can be a derivative of hexamethylene diisocyanate.

[0201] As the polyisocyanate compound, a prepolymer of the above-mentioned polyisocyanate or its derivative can also be used. The prepolymer can be obtained by reacting the polyisocyanate or its derivative with a compound capable of reacting therewith under the condition of excess isocyanate groups. The compound capable of reacting with the polyisocyanate or its derivative is a compound having an active hydrogen group such as a hydroxyl group or an amino group. As the above-mentioned compound, for example, there can be cited polyols, low molecular weight polyester resins, amines, water.

[0202] As the polyisocyanate compound, a blocked polyisocyanate compound may also be used. The blocked polyisocyanate compound can be obtained by blocking the isocyanate groups in the above polyisocyanate or its derivative with a blocking agent.

[0203] As the blocking agent, for example, phenolic compounds, lactam compounds, alcohols, ethers, oxime compounds, compounds having an active methylene group, thiol compounds, amide compounds, imide compounds, amine compounds, imidazole compounds, urea compounds, urethanes, imine compounds, sulfites, azole compounds, and ketone compounds can be cited.

[0204] From the viewpoints of curability and abrasion resistance of the coating film, the equivalent ratio (=OH / NCO) of the hydroxyl group of the hydroxyl group-containing resin to the isocyanate group of the polyisocyanate compound can be 0.5 or more and 2.0 or less. The above equivalent ratio (=OH / NCO) can be 0.8 or more. The above equivalent ratio (=OH / NCO) can be 1.5 or less.

[0205] · Solvent

[0206] The solvent can be water (deionized water), can be an organic solvent, or can be a combination thereof. Among them, from the viewpoint of low VOC, it can be water. That is, the transparent coating (Z) can be aqueous. In the aqueous transparent coating (Z), the proportion of water in the solvent is 50% by mass or more, and can be 80% by mass or more. As the organic solvent, the same organic solvents as those exemplified for the organic solvent of the bright pigment dispersion (X) can be cited.

[0207] · Pigment

[0208] The transparent coating (Z) can contain pigments within a range that does not impair transparency. As the pigments, for example, the above bright pigments, coloring pigments, and extender pigments can be cited. They can be used alone or in combination of two or more. The addition amount of the pigment is not particularly limited. The PWC of the pigment can be 30% by mass or less, and can be 10% by mass or less. The PWC of the pigment can be 0.01% by mass or more.

[0209] · Additive

[0210] The transparent coating (Z) can contain various additives as needed. As the additives, the same substances as those exemplified for the additives of the bright pigment dispersion (X) can be cited.

[0211] (4) Curing step

[0212] The uncured bright coating film, the uncured colored coating film, and the uncured transparent coating film are cured at one time. Each coating film can be cured by heating.

[0213] The heating conditions are appropriately set according to the composition of each coating film, etc. The heating temperature is, for example, 70°C or higher and 150°C or lower, and can be 80°C or higher and 140°C or lower. The heating time is, for example, 10 minutes or longer and 40 minutes or shorter, and can be 20 minutes or longer and 30 minutes or shorter. As the heating device, for example, drying furnaces such as hot blast furnaces, electric furnaces, and infrared induction heating furnaces can be cited.

[0214] Examples

[0215] Hereinafter, examples and comparative examples are given to more specifically illustrate the present invention. However, the present invention is not limited to these examples. It should be noted that both "parts" and "%" are based on mass basis.

[0216] [Example 1]

[0217] (I) Preparation of the object to be coated

[0218] As the object to be coated, a phosphated steel sheet with a cured electrodeposition coating film was prepared. The cured electrodeposition coating film was formed by electrodeposition coating a cationic electrodeposition coating composition "POWERNIX" manufactured by Nippon Paint Co., Ltd. on the phosphated steel sheet so that the dry film thickness became 20 μm, and then heating at 160°C for 30 minutes.

[0219] (II) Preparation of the coating material

[0220] · Preparation of the bright pigment dispersion (X)

[0221] In 0.86 parts of scaly aluminum (Al) particles A, 0.09 parts of scaly Al particles B, 0.03 parts of chromium oxide vapor-deposited, 13.7 parts of aluminum dissolution diluent, 0.99 parts of carbon black pigment, 1.04 parts of perylene pigment, 0.09 parts of iron oxide pigment, 3.50 parts of a hydroxyl group-containing acrylic emulsion resin, 3.50 parts of a thermosetting resin, 0.24 parts of phosphoric acid, 0.33 parts of a surface modifier, 0.37 parts of an amine, and 0.03 parts of an antifoaming agent, deionized water was added so that the solid content ratio became 18.0% and stirred to obtain the bright pigment dispersion (X).

[0222] Scaly Al particles A: Trade name "Z0684N", manufactured by Toyo Aluminum Co., Ltd., thickness 0.15 μm, average particle diameter 12 μm

[0223] Scaly Al particles B: Trade name "FD-5090", manufactured by Asahi Kasei Corporation, thickness 0.11 μm, average particle diameter 9 μm

[0224] Chromium oxide vapor-deposited: Trade name "METALURE Liquid Black", manufactured by Eckart Co., Ltd., thickness 0.015 - 0.2 μm, average particle diameter 14 μm

[0225] · Preparation of Coloring Coating (Y)

[0226] Deionized water was added to 1.01 parts of perylene pigment, 0.27 parts of iron oxide pigment, 7.57 parts of hydroxy-containing acrylic emulsion resin, 1.71 parts of acrylic resin, 4.81 parts of thermosetting resin, 0.26 parts of surface modifier, 0.47 parts of amine, and 0.01 part of defoamer so that the total amount became 100 parts, and the mixture was stirred to obtain coloring coating (Y) with a solid content rate of 23.0%.

[0227] (Manufacture of Hydroxy-Containing Acrylic Resin Emulsion)

[0228] In a reaction vessel for the usual manufacture of acrylic resin emulsion equipped with a stirrer, thermometer, dropping funnel, reflux condenser, nitrogen inlet tube, etc., 445 parts of water and 5 parts of Newcol 293 (manufactured by Nippon Emulsifier Co., Ltd.) were charged, and while stirring them, the temperature was raised to 75°C. A monomer mixture containing 145 parts of methyl methacrylate, 50 parts of styrene, 220 parts of ethyl acrylate, 70 parts of 2-hydroxyethyl methacrylate, and 15 parts of methacrylic acid, 240 parts of water, and 30 parts of Newcol 293 (manufactured by Nippon Emulsifier Co., Ltd.) was emulsified using a homogenizer to obtain a monomer pre-emulsion. While stirring in the above reaction vessel, the monomer pre-emulsion was added dropwise over 3 hours. Simultaneously with the dropwise addition of the monomer pre-emulsion, an aqueous solution in which 1 part of APS (ammonium persulfate) was dissolved in 50 parts of water as a polymerization initiator was uniformly added dropwise to the above reaction vessel until the dropwise addition of the monomer pre-emulsion was completed. After the dropwise addition of the monomer pre-emulsion was completed, the reaction was further continued at 80°C for 1 hour. After cooling the reaction product, an aqueous solution obtained by dissolving 2 parts of dimethylaminoethanol in 20 parts of water was added to the above reaction vessel to obtain a hydroxy-containing acrylic resin emulsion with a solid content rate of 40.6 mass%.

[0229] For the solid content of the obtained hydroxy-containing acrylic resin emulsion, the acid value was 20 mgKOH / g, the hydroxyl value was 60 mgKOH / g, and the glass transition temperature (Tg) was 30°C. The solid content rate was measured according to the heating residue measurement method of JIS K 5601-1-2.

[0230] · Preparation of Transparent Coating (Z)

[0231] As the transparent coating (Z), PU Excel O-3100-6 (manufactured by Nippon Paint Co., Ltd., two-component transparent coating, containing a hydroxy-containing resin and a polyisocyanate compound) was prepared.

[0232] (III) Formation Process of Uncured Glossy Coating Film

[0233] On the object to be coated with an electrodeposited coating film, a brightening pigment dispersion (X) is applied using metabell.

[0234] (IV) Formation step of uncured colored coating film

[0235] On the uncured brightening coating film, a colored paint (Y) is applied using metabell.

[0236] (V) Formation step of uncured transparent coating film

[0237] On the uncured colored coating film, a transparent paint (Z) is applied using micomibel.

[0238] (VI) Curing step

[0239] After the formation step (V) of the transparent coating film, it is heated at 140 °C for 20 minutes to obtain an object to be coated with a multilayer coating film A1. In the multilayer coating film A1, the thickness of the brightening coating film is 5 μm, the thickness of the colored coating film is 10 μm, and the thickness of the transparent coating film is 30 μm.

[0240] [Comparative Example 1]

[0241] An object to be coated with a multilayer coating film B1 is obtained in the same manner as in Example 1, except that a brightening pigment dispersion (x1) prepared as follows is used.

[0242] · Preparation of brightening pigment dispersion (x1)

[0243] To 0.95 parts of scaly A1 particles C, 0.03 parts of vapor-deposited chromium oxide, 13.7 parts of aluminum dissolution diluent, 0.99 parts of carbon black pigment, 1.04 parts of perylene pigment, 0.09 parts of iron oxide pigment, 3.50 parts of hydroxy group-containing acrylic emulsion resin, 3.50 parts of thermosetting resin, 0.24 parts of phosphoric acid, 0.33 parts of surface modifier, 0.37 parts of amine, and 0.03 parts of antifoaming agent, deionized water is added in such a manner that the solid content ratio becomes 18% and stirred to obtain a brightening pigment dispersion (x1).

[0244] Scaly Al particles C: Trade name "WM-2068", manufactured by Asahi Kasei Corporation, thickness 0.15 μm, average particle size 16 μm

[0245] [Comparative Example 2]

[0246] An object to be coated with a multilayer coating film B2 is obtained in the same manner as in Example 1, except that a brightening pigment dispersion (x2) prepared as follows is used.

[0247] · Preparation of brightening pigment dispersion (x2)

[0248] In 0.95 parts of flaky Al particle D, 0.03 parts of vapor-deposited chromium oxide, 13.7 parts of aluminum dissolution diluent, 0.99 parts of carbon black pigment, 1.04 parts of perylene pigment, 0.09 parts of iron oxide pigment, 3.50 parts of hydroxyl group-containing acrylic emulsion resin, 3.50 parts of thermosetting resin, 0.24 parts of phosphoric acid, 0.33 parts of surface modifier, 0.37 parts of amine, and 0.03 parts of antifoaming agent, deionized water was added so that the solid content ratio became 18%, and the mixture was stirred to obtain a bright pigment dispersion (x2).

[0249] Flaky Al particle D: Trade name “TCR-3080”, manufactured by Toyo Aluminum Co., Ltd., thickness 0.33 μm, average particle size 13 μm

[0250] [Comparative Example 3]

[0251] An article with a multilayer coating film B3 was obtained in the same manner as in Example 1, except that the thickness of the bright coating film was 2 μm.

[0252] [Comparative Example 4]

[0253] An article with a multilayer coating film B4 was obtained in the same manner as in Example 1, except that the thickness of the bright coating film was 10 μm.

[0254] [Comparative Example 5]

[0255] An article with a multilayer coating film B5 was obtained in the same manner as in Example 1, except that the solid content ratio of the bright pigment dispersion was adjusted to 15.0%.

[0256] [Comparative Example 6]

[0257] An article with a multilayer coating film B6 was obtained in the same manner as in Example 1, except that the solid content ratio of the bright pigment dispersion was adjusted to 25.0%.

[0258] [Evaluation]

[0259] The obtained multilayer coating film or bright coating film was evaluated as follows. The evaluation results are shown in Table 1.

[0260] (1) Thickness of the bright coating film

[0261] Using an electromagnetic film thickness gauge (FISCHERSCOPE (registered trademark) MMS PC2, manufactured by FisherInstruments Co., Ltd.), the thickness of the cured bright coating film was measured. The average value of 5 different specimens was taken as the thickness of the bright coating film. The thickness of the other coating films was measured in the same manner.

[0262] (2) Lightness L * 15 、Lightness L* 110

[0263] As a test panel, a painted article having a multi-layer coating film formed thereon was used.

[0264] Using a variable-angle colorimeter (Gonio-Pectrophotometer GSP-1, manufactured by Murakami Color Research Laboratory Co., Ltd.), light I irradiated from the transparent coating film side to the multi-layer coating film at an angle of 45 degrees was obtained. 45 L values when received at angles of 15 degrees and 110 degrees with respect to the specularly reflected light. * C * Lightness L in the LCh color system. * 15 And lightness L. * 110 The average values of five different specimens were set as lightness L. * 15 And lightness L. * 110 The lightness L of Example 1. * 15 Was 20.0, and the lightness L. * 110 Was 2.9.

[0265] (3) Chroma C * 15 Chroma C. * 110

[0266] In the same manner as in (2), L. * C * Chroma C in the LCh color system. * 15 And chroma C. * 110 The average values of five different specimens were set as chroma C. * 15 And chroma C. * 110 The chroma C of Example 1. * 15 Was 44.1, and the chroma C. * 110 Was 4.6.

[0267] (4) Lightness GL * 15 Lightness GL. * 110

[0268] Apply a bright pigment dispersion on the object to be coated and heat it at 140 °C for 20 minutes. Use the resulting substance as a test panel. Except for irradiating light on the surface of the obtained bright coating film from an angle of 45 degrees, obtain the L of the bright coating film in the same manner as in (2). * C * Lightness GL in the h colorimetric system * 15 and lightness GL * 110 . Set the average value of 5 different specimens as lightness GL * 15 and lightness GL * 110 . The lightness GL of Example 1 * 15 is 46.4, and the lightness GL * 110 is 2.3.

[0269] (5) Chroma GC * 15 , GC * 110

[0270] In the same manner as in (4), obtain the chroma GC * C * in the h colorimetric system * 15 and chroma GC * 110 . Set the average value of 5 different specimens as chroma GC * 15 and chroma GC * 110 . The chroma GC of Example 1 * 15 is 23.4, and the chroma GC * 110 is 1.0.

[0271] (6) Particle feeling Si 15 value

[0272] Use a multi-angle colorimeter (BYK-maci, manufactured by BYK-Gardner). Take a picture and analyze the light irradiated from a direction inclined 15 degrees from the normal direction of the multilayer coating film in the normal direction of the multilayer coating film, thereby obtaining the particle feeling Si 15 . Set the average value of 5 different specimens as the particle feeling Si 15 .

[0273] (7) Masking property of the bright coating film

[0274] A masking rate test paper (manufactured by Nippon Test Panel Co., Ltd.) based on JIS K 5600-4-1(b) was used. On the black-and-white square pattern with a size of 2×2 cm of the masking rate test paper, a bright pigment dispersion was sprayed to form a gradient of dry film thickness, and then it was heated and cured. Next, the film coating part where the boundary of the black-and-white square pattern could not be seen through was visually determined, and the film thickness of this part was measured. The measured film thickness was set as the black-and-white masking film thickness. Based on the obtained black-and-white masking film thickness and the following evaluation criteria, the masking property of the bright film coating was evaluated.

[0275] (Evaluation Criteria)

[0276] Good: The black-and-white masking film thickness is 6 μm or less

[0277] Poor: The black-and-white masking film thickness exceeds 6 μm

[0278] (8) Light transmittance

[0279] A bright pigment dispersion was coated on the substrate for peeling, and heated at 140 °C for 20 minutes. Next, the formed film coating was peeled off from the substrate to obtain a film. Light with a wavelength of 400 to 700 nm was irradiated on this film using a spectrophotometer (U-3310 manufactured by Hitachi, Ltd.), and the light transmittance was measured every 10 nm.

[0280] (Evaluation Criteria)

[0281] Good: The light transmittance is 0.25% or less at any wavelength

[0282] Poor: The light transmittance exceeds 0.25% at any wavelength [Table 1]

[0283]

[0284] This disclosure includes the following aspects.

[0285] [1] A coated article having an object to be coated and a multi-layer film coating, wherein,

[0286] The multi-layer film coating has:

[0287] A bright film coating formed on the object to be coated and containing bright pigments, a colored film coating formed on the bright film coating and containing colored pigments, and

[0288] A transparent film coating formed on the colored film coating,

[0289] Lightness L * 15 With lightness L * 110 The ratio (L * 15 / L* 110 ) is 5 or more and 9 or less, and the lightness L * 15 is the lightness based on the spectral reflectance obtained by receiving light I irradiated on the surface of the multilayer coating film from an angle of 45 degrees 45 at an angle of 15 degrees with respect to the specularly reflected light, and the lightness L * 110 is based on the light I 45 at an angle of 110 degrees with respect to the specularly reflected light, and the lightness based on the spectral reflectance obtained by receiving it

[0290] Chroma C * 15 and the chroma C * 110 ratio (C * 15 / C * 110 ) is 8 or more and 12 or less, and the chroma C * 15 is based on the light I 45 at an angle of 15 degrees with respect to the specularly reflected light, and the L * C * chroma in the LCH color system, and the chroma C * 110 is based on the light I 45 at an angle of 110 degrees with respect to the specularly reflected light, and the L * C * chroma in the LCH color system.

[0291] [2] The coated article according to [1] above, wherein the lightness GL * 15 and the lightness GL * 110 ratio (GL * 15 / GL * 110 ) is 15 or more and 25 or less, and the lightness GL * 15 is the lightness based on the spectral reflectance obtained by receiving light GI irradiated on the surface of the glossy coating film from an angle of 45 degrees 45 at an angle of 15 degrees with respect to the specularly reflected light, and the lightness GL * 110 is the lightness based on the spectral reflectance obtained by receiving the light GI 45 at an angle of 110 degrees with respect to the specularly reflected light,

[0292] Chroma GC* 15 and the chroma GC * 110 ratio (GC * 15 / GC * 110 ) is 15 or more and 35 or less, and the chroma GC * 15 is the chroma in the L 45 C * C * h colorimetric system based on the spectral reflectance obtained by receiving the light GI * 110 at an angle of 15 degrees with respect to the specularly reflected light, and the chroma GC 45 is the chroma in the L * C * h colorimetric system based on the spectral reflectance obtained by receiving the light GI

[0293] [3] The coated article according to [1] or [2] above, wherein the thickness of the glossy coating film is 3 μm or more and 7 μm or less.

[0294] [4] The coated article according to any one of [1] to [3] above, wherein the glossy pigment contains flaky aluminum particles.

[0295] [5] The coated article according to [4] above, wherein the average particle diameter of the flaky aluminum particles is 8 μm or more and 13 μm or less, and the thickness is 0.08 μm or more and 0.2 μm or less.

[0296] [6] The coated article according to any one of [1] to [5] above, wherein the glossy pigment contains vapor-deposited chromium oxide.

[0297] [7] A method for manufacturing a coated article, comprising:

[0298] a step of coating a glossy pigment dispersion containing a glossy pigment on an object to be coated to form an uncured glossy coating film,

[0299] a step of coating a coloring paint containing a coloring pigment on the uncured glossy coating film to form an uncured colored coating film,

[0300] a step of coating a transparent paint on the uncured colored coating film to form an uncured transparent coating film, and

[0301] a step of curing the uncured glossy coating film, the uncured colored coating film, and the uncured transparent coating film to obtain a multilayer coating film.

[0302] Brightness L * 15 With the brightness L * 110 Ratio (L * 15 / L * 110 ) is 5 or more and 9 or less, and the brightness L * 15 is the brightness based on the spectral reflectance obtained by receiving the light I irradiated on the surface of the multilayer coating film from an angle of 45 degrees 45 at an angle of 15 degrees with respect to the specularly reflected light, and the brightness L * 110 is the brightness based on the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light,

[0303] Chroma C * 15 With the chroma C * 110 Ratio (C * 15 / C * 110 ) is 8 or more and 12 or less, and the chroma C * 15 is the chroma in the L 45 C * C * h color system based on the spectral reflectance obtained by receiving the light I * 110 at an angle of 15 degrees with respect to the specularly reflected light, and the chroma C 45 is the chroma in the L * C * h color system based on the spectral reflectance obtained by receiving the light I

[0304] [8] The method for manufacturing a coated article according to [7] above, wherein the solid content ratio of the bright pigment dispersion is 16% by mass or more and 20% by mass or less.

[0305] [9] The method for manufacturing a coated article according to [7] or [8] above, wherein the transparent coating is a two-component type coating containing a hydroxyl group-containing resin and a polyisocyanate compound.

[0306] Industrial availability

[0307] The coated article of the present invention is particularly suitable as an outer panel of an automobile body.

[0308] This application claims the priority based on Japanese Patent Application No. 2022-192243 filed on November 30, 2022, the entire contents of which are incorporated herein by reference.

Claims

1. A coated article having a substrate to be coated and a multi-layer coating film, wherein: The multi-layer coating film has: A bright coating film formed on the substrate to be coated and containing bright pigments, A colored coating film formed on the bright coating film and containing colored pigments, and A transparent coating film formed on the colored coating film, Brightness L* 15 and the brightness L* 110 ratio (L* 15 / L* 110 ) is 5 or more and 9 or less, and the brightness L* 15 is the brightness based on the spectral reflectance obtained by receiving the light I 45 irradiated onto the surface of the multilayer coating film at an angle of 45 degrees at an angle of 15 degrees with respect to the specularly reflected light, and the brightness L* 110 is the brightness based on the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light. Chroma C* 15 and the chroma C* 110 The ratio (C* 15 / C* 110 ) is 8 or more and 12 or less, and the chroma C* 15 is the chroma in the L*C*h colorimetric system based on the spectral reflectance obtained by receiving the light I 45 at an angle of 15 degrees with respect to the specularly reflected light, and the chroma C* 110 is the chroma in the L*C*h colorimetric system based on the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light.

2. The coated article according to claim 1, wherein, Lightness GL* 15 The ratio with the lightness GL* 110 is 15 or more and 25 or less (GL* 15 / GL* 110 ), and the lightness GL* 15 is the lightness based on the spectral reflectance obtained by receiving the light GI 45 irradiated on the surface of the light-reflective coating film at an angle of 45 degrees at an angle of 15 degrees with respect to the specularly reflected light. The lightness GL* 110 is the lightness based on the spectral reflectance obtained by receiving the light GI 45 at an angle of 110 degrees with respect to the specularly reflected light. Chroma GC* 15 and chroma GC* 110 The ratio (GC* 15 / GC* 110 ) is 15 or more and 35 or less, and the chroma GC* 15 is the chroma in the L*C*h colorimetric system based on the spectral reflectance obtained by receiving the light GI 45 at an angle of 15 degrees with respect to the specularly reflected light, and the chroma GC* 110 is the chroma in the L*C*h colorimetric system based on the spectral reflectance obtained by receiving the light GI 45 at an angle of 110 degrees with respect to the specularly reflected light.

3. The coated article according to claim 1 or 2, wherein The thickness of the bright coating film is 3 μm or more and 7 μm or less.

4. The coated article according to any one of claims 1 to 3, wherein, The bright pigments contain flaky aluminum particles.

5. The coated article according to claim 4, wherein, The average particle size of the flaky aluminum particles is 8 μm or more and 13 μm or less, and the thickness is 0.08 μm or more and 0.2 μm or less.

6. The coated article according to any one of claims 1 to 5, wherein, The bright pigments contain vapor-deposited chromium oxide.

7. A method for manufacturing a coated article, having: A step of coating a bright pigment dispersion containing bright pigments on a substrate to be coated to form an uncured bright coating film, A step of coating a colored paint containing colored pigments on the uncured bright coating film to form an uncured colored coating film, A step of coating a transparent paint on the uncured colored coating film to form an uncured transparent coating film, and A step of curing the uncured bright coating film, the uncured colored coating film, and the uncured transparent coating film to obtain a multi-layer coating film, Brightness L* 15 The ratio with the brightness L* 110 (L* 15 / L* 110 ) is 5 or more and 9 or less, and the brightness L* 15 is the brightness based on the spectral reflectance obtained by receiving the light I irradiated on the surface of the multilayer coating film from an angle of 45 degrees 45 at an angle of 15 degrees with respect to the specularly reflected light, and the brightness L* 110 is the brightness based on the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light. Chroma C* 15 and the chroma C* 110 The ratio (C* 15 / C* 110 ) is 8 or more and 12 or less, and the chroma C* 15 is the chroma in the L*C*h colorimetric system based on the spectral reflectance obtained by receiving the light I 45 at an angle of 15 degrees with respect to the specularly reflected light, and the chroma C* 110 is the chroma in the L*C*h colorimetric system based on the spectral reflectance obtained by receiving the light I 45 at an angle of 110 degrees with respect to the specularly reflected light.

8. The manufacturing method of the coated article according to claim 7, wherein, The solid content ratio of the bright pigment dispersion is 16% by mass or more and 20% by mass or less.

9. The manufacturing method of the painted article according to claim 7 or 8, wherein, The transparent paint is a two-component type paint containing a hydroxyl group-containing resin and a polyisocyanate compound.

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