JP2000126678A - Coated metallic sheet coated with heat shieldable coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coated metallic sheet which has an excellent reflection characteristic in a near IR region, is, therefore, capable of preventing the temperature rise of the coated metallic sheet and has excellent weatherability as well in spite of the metallic sheet coated with a coating material of black or dark color. SOLUTION: The coated metallic sheet consists of the coated metallic sheet formed by coating the metallic sheet selected from a cold rolled steel sheet, galvanized steel sheet, aluminum plated steel sheet, aluminum-zinc plated steel sheet, aluminum-manganese plated steel sheet, aluminum sheet, stainless steel sheet and copper sheet with the heat shieldable coating material containing at least one kind of colored pigments which exhibit absorption in a visible region and exhibit reflection in a near IR region and coloring pigments of >=12% in the solar radiation reflectivity defined by JIS A 5759 or above, a vehicle having the excellent weatherability and a white pigment at need.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coated metal plate having a shielding effect against solar heat and the like.

[0002]

2. Description of the Related Art From the viewpoint of energy saving and the like, many proposals have been made on painted metal plates having a shielding effect against solar heat or the like. However, many of them are examples of using a white or near-light colored paint as a paint applied to a metal plate, and not a black or nearly dark colored paint. Pigments such as carbon black and iron black are usually used for dark-colored paints.However, compared to light-colored paints, these pigments can easily absorb sunlight in a wide wavelength range from the ultraviolet to the near-infrared region. The temperature rises indoors or the like from the film through the metal plate. Further, thermal degradation of the resin in the coating film causes chalking, discoloration and the like of the coating film. These phenomena are particularly pronounced in dark and matte coatings.

As a prior art relating to a metal plate coated with a heat-shielding paint of black or dark color, any one of red, orange, yellow, green, blue and violet pigments exhibiting high reflectance in the ultraviolet and near-infrared regions is known. Japanese Patent Laid-Open No. 4-25 / 1994 discloses a coating structure obtained by applying a black paint of Munsell symbol N-1 by additive color mixing.
No. 5,769. With this technology, a coated structure that does not show absorption in the near infrared region can be obtained and the temperature rise can be suppressed, but on the other hand, the weather resistance of the additively mixed pigments is different, so that the pigments with low weather resistance during use Has a problem that the color of the entire coating film changes from the original black color to purple, green, orange, or the like due to discoloration. Further, it is extremely difficult to adjust black of the Munsell symbol N-1 by additive color mixture.

[0004]

As described above, a conventional metal plate coated with a black or dark colored heat-shielding paint is:
The coating film was insufficient in terms of weather resistance, color retention, and the like, and it was difficult to adjust the hue of the coating. Accordingly, the present invention provides a novel metal plate coated with black or dark color paint, which has excellent reflection characteristics in the near-infrared region, and therefore can prevent a rise in temperature of the coated metal plate and has excellent weather resistance. A painted metal plate is provided.

[0005]

According to the present invention, there is provided a pigment which absorbs in the visible region and reflects in the near infrared region, and has a solar reflectance of 12% as defined in JIS A 5759. At least one or more of the above-mentioned coloring pigments, a vehicle having excellent weather resistance, and a heat-shielding paint containing a white pigment as necessary, and a coated metal plate obtained by coating a metal plate. .

[0006] The metal sheet may be a cold-rolled steel sheet, a galvanized steel sheet, an aluminum-plated steel sheet, an aluminum sheet.
Galvanized steel sheet, aluminum-manganese coated steel sheet,
It is a metal plate selected from an aluminum plate, a stainless steel plate, and a copper plate.

[0007] The metal plate is made of JIS A575.
9 is a metal plate having a solar reflectance of 60% or more.

[0008] Further, the present invention provides the above-mentioned metal plate, wherein the metal plate is a metal plate containing 50% by weight or more of aluminum or a metal plate plated with a metal containing 50% by weight or more of aluminum, and the solar reflection defined in JIS A 5759. It is a metal plate having a ratio of 60% or more.

[0009]

Embodiments of the present invention will be described below in detail.

First, the heat-shielding paint constituting the coated metal sheet of the present invention will be described. The heat-shielding paint is characterized by using a pigment that absorbs in the visible region and reflects in the near-infrared region (hereinafter referred to as a dark-colored reflective pigment). Since it shows absorption in the visible region, it exhibits dark colors such as black and dark brown, like conventional carbon black and the like. However, since there is no light absorption in the near infrared region and it has a high reflectance,
Since there is no absorption of heat energy, thermal deterioration of the coating film can be suppressed, and temperature rises of the coating film and the metal plate can be prevented.

As the above-mentioned deep-color reflective pigment, any pigment which absorbs in the ultraviolet and visible regions and reflects in the near-infrared region can be used without particular limitation. Among them, JIS A 5759 Architecture 350-2100nm defined by heat ray shielding and glass shatterproof film
The pigment having a solar reflectance of 15% or more in the region of (1) is preferably used. The solar reflectance data of this patent is
It is measured in a sufficiently concealed state, specifically, a coating film having a concealment ratio of about 1.0.

Further, the dark-colored reflective pigment has a solar reflectance of 15%.
% And at the same time is not less than, L ^* value in CIE1976L ^* a ^* b ^* color space used as a 24 or less. An L ^* value of 24 or less means that the color is black or a dark color close to it. Specific examples of pigments satisfying the above conditions include Chromo Fine Black A-11.
03 (manufactured by Dainichi Seika Kogyo Co., Ltd.).

The content of the dark reflective pigment in the paint can be appropriately set in consideration of the use of the metal plate coated with the paint, weather resistance, and the like. However, if the content is small, the hiding power is insufficient. As a result, the paint cannot fulfill its original aesthetic role, and the undercoating tends to deteriorate. Conversely, if the content is large, the coating film becomes brittle and the cost increases. 7 to 110 parts by weight per part is preferred.

Further, the heat-shielding paint is characterized by using a vehicle having excellent weather resistance. The vehicle excellent in weather resistance as referred to herein means a vehicle excellent in yellowing resistance, color retention, gloss retention, chemical resistance, chalking resistance, etc., water-soluble type and solvent type, or at room temperature. Both a drying type and a baking type can be used. By using such a vehicle together with the above-mentioned dark-colored reflective pigment, it is possible to obtain excellent heat shielding properties and weather resistance of the coating film and the coated metal plate as a whole.

Specific examples of the vehicle having excellent weather resistance include acrylic resin, polyester resin, silicone-modified polyester resin, silicon-modified acrylic resin, alkyd resin, vinyl chloride resin, and fluorine-based resin as main components. Among them, polyester resins and fluorine-based resins are preferably used. If necessary, a curing agent such as various isocyanates and melamine resins can be used.

The coating material includes at least one coloring pigment excluding the conventional black pigments such as carbon black and iron black, in addition to the above-described dark-colored reflecting pigment, and a white pigment (hereinafter, referred to as a pigment).
And the like). The white pigment may be used as needed. Therefore, as a pigment other than the deeply colored reflective pigment, a case of using only a colored pigment and a case of using a colored and white pigment are applicable. By containing a coloring pigment or the like, paints of various colors can be adjusted. Compared to the conventional case where a black pigment such as carbon black is mixed, the coating film absorbs less heat energy, so that discoloration and the like are less likely to occur.

As the above-mentioned coloring pigment, various kinds of commonly used pigments can be applied. Among them, JIS A
Pigments having a solar reflectance of 12% or more in the region of 350 to 2100 nm defined in 5759 are preferably used. It should be noted that the solar reflectance data of this patent is measured on fully concealed coatings. Examples of the coloring pigment satisfying this condition include yellow pigments such as monoazo yellow (trade name: Hoster Palm Yellow H3G: manufactured by Hoechst Co., Ltd.);
Iron oxide (trade name: Todacolor 120ED: Toda Kogyo Co., Ltd.)
Quinacridone red (Hostaperm Re)
d Red pigments such as E2B70: manufactured by Hoechst Co., Ltd.)
Phthalocyanine Blue (trade name: Cyanin Blue SPG-
8: manufactured by Dai Nippon Ink Co., Ltd.), and green pigments such as phthalocyanine green (trade name: Shinin Green 5310: manufactured by Dainichi Seika Kogyo Co., Ltd.).

The white pigment is not particularly limited, and specific examples thereof include pigments such as titanium oxide and zinc white. Titanium oxide can be applied to both rutile type and anatase type, but rutile type titanium oxide is particularly preferably used.

When the dark reflective pigment and the coloring pigment are used in combination, the content is 7 to 110 parts by weight of the dark reflective pigment and 7 to 110 parts by weight of the colored pigment per 100 parts by weight of the resin solid content of the paint. 110 parts by weight and 40 parts of white pigment
It is preferable to set it to 230 parts by weight. If the content is outside the above range, the concealing power is insufficient if the content is small, and the coating workability and durability are poor if the content is large.

The content of the pigment as a whole is preferably 7 to 150 parts by weight based on 100 parts by weight of the resin solid content of the paint. If the content is less than the predetermined amount, sufficient hiding power of the coating film cannot be obtained and sunlight or the like is easily transmitted, so that the temperature rises and causes deterioration of the coating film. On the other hand, if the film thickness is increased to obtain the hiding power, it is not suitable because the coating workability is hindered. Conversely, if the amount is more than the predetermined amount, the pigment on the surface of the coating film is partially exposed, so that the smoothness is lowered, and the resistance to moisture, light, heat and the like is significantly impaired.

The degree of dispersion of the above-mentioned dark-colored reflective pigments and colored pigments in the dispersion step in preparing the paint can be set according to the kind of the paint, the use of the coated metal plate, etc., and is not particularly limited. No, but average particle size is 50 μm
It is preferable that the particles be dispersed so as to be less than or equal to 10 μm. When the thickness is 50 μm or more, the surface of the coating film becomes uneven and the appearance is impaired, and dust and the like easily adhere to the rough coating film surface, and the coating film temperature easily rises, resulting in weather resistance, stain resistance, color stability, and the like. Is unsuitable because it deteriorates.

It is preferable to use a medium other than iron as a dispersion medium for dispersing the pigment. Iron dispersion media are unsuitable because they reduce the solar reflectance of the pigment due to color contamination. Specific examples of the dispersion medium other than iron include ceramics, glass beads, flint stone, and the like.
Among them, glass beads are easily used and excellent in economical efficiency, and thus are preferably used. The particle size of the dispersing medium, the filling amount, the type of the pigment dispersing machine, etc. are not particularly limited. However, as a specific example of the embodiment, glass beads of 3 to 1.5 mm are filled to about 80% of the capacity of the sand grind mill. Can be mentioned.

The heat-shielding paint may contain an aggregate having a reflecting function and a heat insulating function, in addition to the pigment and the vehicle described above. Shirasu balloon, as a specific example of the aggregate,
Hollow particles such as polystyrene balloons and ceramic balloons are exemplified. Since these aggregates have a reflecting function and a heat insulating function, in combination with the above-mentioned deeply colored reflecting pigment, the heat shielding property and the weather resistance of the coating film and the coated metal plate can be further improved.

Among the above aggregates, a ceramic balloon made of silicon boride or the like is preferably used because it can reflect sunlight and the like in the surface layer and in the shell, and is hollow and excellent in heat insulation. Further, the ceramic balloon is preferably used together with a structure retaining agent. The paint containing the ceramic balloon and the structure retaining agent described herein has been already proposed by the present inventors in Japanese Patent Application No. 10-130742. Since the ceramic balloon has a specific gravity of less than 1, when it is used alone, it tends to float on the surface of the paint, so that the solvent in the paint surface layer volatilizes, causing a so-called skinning phenomenon, resulting in poor storage stability. However, by including the structure-retaining agent, structural viscosity is imparted to the paint, the balloons can be uniformly distributed, and the storage stability is improved. Further, since the coating film containing the balloon has water resistance, the overall weather resistance can be further improved.

The conditions applicable to the present invention, such as the type and content of the ceramic balloon and the structure retaining agent, are the same as those disclosed in Japanese Patent Application No. 10-130742.
In addition, the following conditions are preferably used in order to obtain optimum weather resistance by a synergistic effect with the deeply colored reflective pigment.
That is, the particle size of the balloon is preferably 5 to 110 μm. If it is larger than 110 μm, the coating film becomes uneven, which is not suitable. Particle size distribution is 30-65μ in the total 50% area
m, it is preferably 50 to 110 μm in total of 90%. The specific gravity of the balloon is preferably from 0.16 to 0.6. Further, the strength of the balloon is preferably in the range of ^{20 to} 750 kgf / cm ² . If it is smaller than this range, the balloon is liable to be destroyed during the production of the coating material. Further, as the type of the structure retaining agent, a fatty acid amide / fine silica composite system, an organic bentonite / fine silica composite system, a fatty acid amide / organic bentonite / fine silica composite system,
A composite system of oxidized polyethylene wax / fine silica and a material obtained by removing fine silica from the above composite system are preferably used.

Further, the coating material used in the present invention can contain various additives which are usually used. Specifically, color separation preventive, sediment preventive, surface conditioner, lubricant, plasticizer, defoamer, preservative, antifreeze, hardener, pigment dispersant, emulsifier, desiccant, ultraviolet absorber , Fungicides,
Antibacterial agents and the like can be mentioned.

The metal plate to be coated with the above heat-shielding paint is not particularly limited, and a metal plate made of a single metal or alloy can be used. Also, a metal-plated plate can be used.
Single metals and alloys are applicable. Specifically, cold-rolled steel sheet, galvanized steel sheet, aluminum-plated steel sheet, aluminum-galvanized steel sheet, aluminum-manganese-plated steel sheet, aluminum sheet, stainless steel sheet,
Examples include a copper plate, an iron plate, a tin plate, and a titanium alloy plate.

The metal plate used for the coated metal plate of the present invention preferably has a high solar reflectance by itself. The heat energy transmitted through the coating film is further reflected by the metal plate, so that the temperature does not increase as a whole of the coated metal plate and the heat shielding property is improved. It also contributes to preventing thermal deterioration of the coating film. The specific value of the solar reflectance is preferably 60% or more. Examples of the metal plate satisfying this condition include a 5% aluminum-zinc plated steel plate, a 55% aluminum-zinc plated steel plate, a 75% aluminum-manganese plated steel plate, a stainless steel plate, and an aluminum plate.

Further, among the above metal plates having a solar reflectance of 60% or more, a metal plate containing 50% by weight or more of aluminum or a metal plate plated with a metal containing 50% by weight or more of aluminum has a high solar reflectance. It is particularly preferably used because it is easily obtained. If aluminum is contained at 50 wt% or more, aluminum alone or an alloy may be used. Components other than aluminum in the case of an alloy are not particularly limited as long as the reflectance of the metal plate is not impaired, and metals such as zinc and manganese and nonmetals such as silicon can be applied.

In coating, the above-mentioned metal plate can be subjected to a pretreatment. As a specific pre-processing method,
Chemical conversion treatment, pickling, degreasing, rust removal by polishing, and the like,
Further, examples of the chemical conversion treatment include an iron phosphate treatment, a zinc phosphate treatment, a reaction type chromate treatment, and a coating type chromate treatment. What kind of processing method is used
It can be appropriately selected depending on the type of metal plate, economy, required performance, and the like. By performing the pretreatment, the protective function by coating can be improved, the adhesion between the coating film and the metal plate, the corrosion resistance can be improved, and the durability can be obtained.

The method of coating may be appropriately selected according to the purpose, and specific examples include brush coating, roller coating, spray coating, electrostatic coating, and dipping. Further, a method of drying and forming a coating film after coating can be appropriately selected depending on the properties of the coating material, such as natural drying and baking.

In particular, a precoated metal plate can be obtained using a roll coater, a curtain flow coater or the like. This method is advantageous for obtaining a large amount of heat-insulating coated metal plates quickly.

The thickness of the coating film can be appropriately set depending on the properties of the paint and the metal plate, etc., but it is preferable to apply the coating so as to have a thickness of 8 μm or more, more preferably 10 μm or more. When the thickness is 8 μm or less, the hiding power is insufficient, and when the coating contains ceramic balloons, the balloons tend to be unevenly distributed and sufficient heat shielding performance tends not to be obtained.
On the other hand, if the thickness is too large, pinholes are generated in the case of a baked paint, and sagging of the paint is caused in the case of a normal-dry type, which is inappropriate.

In applying the heat-shielding paint to the metal plate, an undercoat can be applied in advance. The undercoat is performed for the purpose of preventing rust, improving the adhesion of the paint to the metal plate, and improving the adhesion to the overcoat, and a conventionally known undercoat can be used as appropriate. As a specific type of the undercoat paint, a resin obtained by adding titanium oxide, a rust preventive pigment, an extender pigment, or the like to a resin such as an epoxy resin, an alkyd resin, an epoxy urethane resin, or a polyester resin is preferably used. The thickness of the coating film can be appropriately determined in consideration of the metal plate, the type of overcoat, the required performance and the like. By applying the undercoat, the adhesion of the paint is enhanced, the durability of the coating film is improved, and the applicable range of the overcoat can be expanded.

After the heat-shielding paint is applied, a top coat such as a contamination-preventing clear can be applied. The overcoating can improve the adhesion, water resistance and the like of the coating film, and can prevent contamination by dust in the air and prevent a decrease in solar reflectance. Further, a glossy coating film can be provided. Acrylic-based, polyester-based clearing agents for preventing contamination, etc. can be used as the top coating.
In particular, an organic-inorganic composite resin to which an ultraviolet inhibitor is added or an extender such as precipitated barium sulfate is dispersed and added has an excellent effect of preventing contamination and is preferably used. Furthermore, the thickness of the overcoat is not particularly limited as long as it can completely cover the heat-shielding paint, but is preferably about 5 to 50 μm.

The undercoat and the overcoat described above can be applied alone or both. Also, an intermediate coating can be applied as needed. Since the intermediate coating thickens the coating film, it has an effect of improving corrosion resistance and imparting resistance to cracking, peeling, and the like of the coating film. What kind of coating system is used depends on the application, required performance (durability, weather resistance),
It is appropriately selected in consideration of economy and the like.

The application of the coated metal sheet obtained by the above method is not particularly limited as long as it is intended to provide a heat shielding function. Specifically, it can be applied to a house, a factory, a cold storage warehouse, and the like. Such as buildings, transport vehicles such as cars, trains, benches, refrigerated vehicles, storage tanks, roofs of structures such as tankers,
A ceiling, an outer wall, an inner wall and the like can be mentioned.

Particularly, the play-coated metal sheet is suitable for use as a material for roofs and outer walls of buildings because of its light weight, excellent economy and safety.

[0039]

The present invention will be described in more detail with reference to the following Examples and Reference Examples, but it should not be construed that the invention is limited thereto.

(Example 1) Table 1 shows the raw materials of the heat-shielding paint applied to the metal plate.

[0041]

[Table 1]

2. Preparation of paint (1) The raw materials were mixed at the ratio shown in Table 2 first with the resin L, the solvent, and the respective pigments.
It was adjusted to 0 ± 5 KU to give G1 to G8. The pigment is 1
0 μm or less, and the dispersion medium at that time has a particle size of 2.1.
mm glass beads (trade name: Hibee D10) were used. In the dispersion step, 500 g of a dispersion medium and 300 g of a premix paste were dispersed using a table-top batch type SG mill.

[0043]

[Table 2]

(2) G1 to G8, resin and the like were mixed at the ratios shown in Table 3 to obtain paint samples P1 to P3 and C1.

[0045]

[Table 3]

3. Production of Painted Metal Plate A painted metal plate was produced under the production conditions of Table 4 using G1, G2 of Table 2 and the paint of Table 3. In addition, the following three types of metal plates having a thickness of 0.8 mm were used as metal plates serving as a base material.・ Cold rolled steel sheet (S) specified in JIS G 3141
PCC) ・ Austenitic stainless steel sheet (SUS304) specified in JIS G4305 ・ Aluminum sheet specified in JIS H4000 (A
1100P) The cold-rolled steel sheet was subjected to hot-dip galvanizing, Al plating, Al-Zn alloy hot-dip plating with 5% and 55% Al content, and 75% Al-25% Mn molten salt electrolytic plating on its surface, respectively. And those without plating were used. The above metal plate was subjected to the following pretreatment upon painting. -Iron phosphate treatment (SPCC)-Coating-type chromate treatment (other metal plates) As shown in Table 4, each metal plate was coated with a primer and a heat-shielding paint with a bar coater, and baked to produce a coated plate. . The printing conditions at that time are shown below. The undercoat paint is composed of an epoxy urethane resin, titanium oxide, a rust preventive pigment, and an extender pigment.・ Undercoat maximum temperature 190 ± 10 ℃ ・ Heat-blocking paint maximum temperature 210 ± 10 ℃

4. The following test was performed on the coated metal plate obtained in Test Method 3. (1) Reflectance chart The wavelength dependence of the reflectance of the coated metal plate was measured using a spectrophotometer. The measurement results are shown in FIGS. (2) Solar reflectance The solar reflectance of the coated metal plate was measured as the solar reflectance in the range of 350 to 2100 nm defined in JIS A 5759. Table 4 shows the results. (3) Temperature of coated metal plate The temperature of the coated metal plate by lamp irradiation was measured. First,
A painted metal plate was processed in a U-shape as shown in FIG. 8, two processed products were arranged in the width direction, and a 200 W Toshiba reflex lamp was irradiated from a height of 130 mm from the processed product. In addition, a, b, and c in FIG. 8 represent the dimensions of the processed product, and a = 2
20 mm, b = 110 mm, and c = 45 mm. The temperature of the coated metal plate was measured by the temperature sensor 2 attached to the center of the back side of the processed product. Since the temperature became substantially constant 15 to 20 minutes after the start of lamp irradiation, the temperature after 20 minutes was used as the measured value.
Table 4 shows the measurement results. (4) L ^* values CIE 1976 L ^* a ^* b ^* L in the color space ^*, it was determined by Karakomu C spectrophotometer (Dainichiseika Color & Chemicals Mfg. Co., Ltd.). Table 4 shows the results.

[0048]

[Table 4]

From the temperatures of the coated steel sheets in Table 4, it is clear that the coated steel sheets of the present invention can be kept at a temperature of 10 ° C. or more lower than those of the comparative examples, and are excellent in heat shielding properties.

The sample No. As is clear from 3, 6, and 7, when the aluminum content in the plating applied to the metal plate is increased, the solar reflectance when the coated metal plate is formed is increased, and the temperature is suppressed.

Sample No. 10 also has excellent heat insulation,
Since the thickness of the coating film is relatively thin, 8 μm, part of the thermal energy passes through the coating film. The solar reflectance of SPCC itself is 55%, which is relatively low. It is slightly higher than the example.

Reference Example 1 A metal plate having a thickness of 0.8 mm shown below was used as a base material.・ Cold rolled steel sheet (S) specified in JIS G 3141
PCC) ・ Austenitic stainless steel sheet (SUS304) specified in JIS G4305 ・ Aluminum sheet specified in JIS H4000 (A
110P) Cold-rolled steel sheet is hot-dip galvanized on its surface, hot-dip galvanized Al-Zn alloy with variously changed Al content, 75% A
Those subjected to 1-25% Mn molten salt electrolytic plating and those not subjected to plating were used.

The solar reflectance of the above metal plate was measured. Table 5 shows the measurement results.

[0054]

[Table 5]

It can be seen that the solar reflectance of each metal plate in Table 5 correlates with the measurement result of the coated metal plate in Table 4.

[0056]

As described above, the coated metal plate of the present invention has excellent reflection characteristics in the near-infrared region even if it is a metal plate coated with a black or dark colored heat-shielding paint. It can prevent a rise in the temperature of the plate and is excellent in weather resistance.

Further, by using a metal plate having a high reflectance for the metal plate to be coated, the reflection performance of the coating film and the metal plate is combined, so that the heat shielding property can be further improved.

[Brief description of the drawings]

FIG. 6 is a graph showing the wavelength dependence of the reflectance in Example 2.

FIG. 6 is a graph showing the wavelength dependence of the reflectance in No. 3;

FIG. 6 is a graph showing the wavelength dependence of the reflectance in No. 6.

FIG. 7 is a graph showing the wavelength dependence of the reflectance in FIG.

FIG. 8 is a graph showing the wavelength dependence of the reflectance in FIG.

FIG. 11 is a graph showing the wavelength dependence of the reflectance at 11;

FIG. 12 is a graph showing the wavelength dependence of the reflectance in No. 12.

FIG. 8 is a diagram showing a method of irradiating a lamp.

[Explanation of symbols]

 1 Painted steel plate 2 Temperature sensor a Dimension of processed product b Dimension of processed product c Dimension of processed product

Claims (4)

[Claims] An excellent weather resistance, comprising a pigment that absorbs in the visible region and reflects in the near infrared region and at least one colored pigment having a solar reflectance of 12% or more defined in JIS A 5759. A coated metal plate obtained by coating a metal plate with a heat-shielding paint containing a vehicle and, if necessary, a white pigment. 2. The metal sheet according to claim 1, wherein the metal sheet is selected from a cold-rolled steel sheet, a galvanized steel sheet, an aluminum-plated steel sheet, an aluminum-galvanized steel sheet, an aluminum-manganese-plated steel sheet, an aluminum sheet, a stainless steel sheet, and a copper sheet. A coated metal plate, which is a plate. 3. The JIS A metal plate according to claim 1,
A coated metal plate having a solar reflectance defined by 5759 of 60% or more. 4. The metal plate according to claim 1, wherein the metal plate contains 50 wt% or more of aluminum or aluminum.
A coated metal plate, which is a metal plate plated with a metal containing 0 wt% or more and having a solar reflectance of 60% or more defined in JIS A 5759.