JP2000129172A - Heat-shielding coating and its coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heat-shielding coating having excellent reflection characteristics in the near IR light region and capable of preventing the rise in the temperature of coating films, even when the coating is a black or dark color coating, by adding a specific pigment and a vehicle having excellent weather resistance. SOLUTION: This heat-shielding coating contains (A) a pigment capable of absorbing light in the visible light region but reflecting light in the near IR light region and (B) a vehicle having excellent weather resistance (preferably an acrylic resin or the like). The component A is a pigment having a solar light reflection factor of >=15% defined by JIS A 5759 and a L' value of <=24 in a CIE 1976 L'a'b' color space, and is contained in an amount of 7-110 pts.wt. per 100 pts.wt. of the resin solid content of the coating. It is preferable that the coating contains at least one of colored pigments having solar light reflection factors of >=12% defined by JIS A 5759 and, if necessary, a white pigment in addition to the above pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-shielding paint having a shielding effect against solar heat and the like, and a coating method therefor. More specifically, the present invention relates to a heat-shielding paint which exhibits low weather absorption even if it is a deep-colored paint and therefore exhibits excellent weather resistance, and a method of applying the same.

[0002]

2. Description of the Related Art From the viewpoint of energy saving and the like, many proposals have been made on heat-shielding paints having a shielding effect against solar heat or the like. However, many of them are limited to white or near light colors, and not to black or near dark colors. 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 through the membrane. 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.

[0003] As a prior art relating to black or dark colored heat-shielding paints, two or more of red, orange, yellow, green, blue and violet pigments exhibiting high reflectance in the ultraviolet and near infrared regions are used.
Japanese Patent Application Laid-Open No. 4-255768 discloses a technique for making the Munsell symbol N-1 black by additive color mixing. With this technology, a coating film 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, since the weather resistance of each additive-mixed pigment is different, a pigment with weak weather resistance during use can be used. There is 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 the discoloration. Further, it is extremely difficult to adjust black of the Munsell symbol N-1 by additive color mixture.

[0004]

As described above, conventional heat-shielding paints of black or dark color are insufficient in terms of weather resistance, color retention and the like, and also have difficulty in adjusting the hue of the paint. there were. Therefore, the present invention provides a novel heat-shielding paint having excellent reflection characteristics in the near-infrared region even if it is a black or dark-colored paint, thereby preventing a rise in temperature of the coating film and having excellent weather resistance. It is. It is another object of the present invention to provide a coating method capable of more effectively exhibiting the weather resistance of the heat-shielding paint.

[0005]

In order to solve the above-mentioned problems, the present invention provides a paint containing a pigment that absorbs in the visible region and reflects in the near-infrared region, and a vehicle having excellent weather resistance. It is characterized by.

[0006] In the present invention, the pigment may be JIS A
The solar reflectance defined in 5759 is 15% or more, and L in the CIE1976 L ^* a ^* b ^* color space
^* It is a pigment having a value of 24 or less.

Further, the present invention is characterized in that the content of the pigment is 7 to 110 parts by weight based on 100 parts by weight of the resin solid content of the paint.

[0008] The present invention further relates to the above-mentioned pigment,
It is characterized by containing at least one or more color pigments having a solar reflectance of 12% or more as defined in SA5759, and a white pigment.

The content of the pigment, which absorbs in the visible region and reflects in the near-infrared region, the color pigment, and the white pigment is 7 to 110 parts by weight with respect to 100 parts by weight of the resin solid content of the paint. Parts, 7-100 parts by weight, and 40-23 parts
It is preferably 0 parts by weight.

As the white pigment, a titanium oxide pigment is preferably used.

Further, the heat-shielding paint of the present invention is characterized in that the pigment contained therein is dispersed in an average particle size of 50 μm or less.

Further, the pigment is dispersed in a dispersion medium other than iron. As a result, coloring contamination due to the dispersion medium can be prevented, and higher reflection performance can be obtained.

As a dispersion medium other than iron, glass beads are preferably used.

The heat-shielding paint of the present invention is characterized in that it contains an aggregate having a reflecting function or a heat insulating function. By using these aggregates in combination with the pigment, the reflection performance of the coating film can be further enhanced.

Further, the present invention is characterized by containing a ceramic balloon and a structure retaining agent. Thereby, high reflection performance can be obtained, and functions such as heat insulation and waterproofness can be provided.

The vehicle having excellent weather resistance used in the present invention includes at least one of an acrylic resin, a polyester resin, a silicon-modified polyester resin, a silicon-modified acrylic resin, an alkyd resin, a vinyl chloride resin, and a fluororesin. Accordingly, it is characterized by containing at least one of isocyanate and melamine resin.

Further, the present invention provides that the above-mentioned heat-shielding paint is applied so that the coating film thickness becomes 8 μm or more.
This is a method for applying a heat-shielding paint, which comprises applying an undercoat and / or an overcoat. By applying the undercoat and / or the overcoat, the durability, weather resistance, stain resistance and the like of the whole coating film can be further improved.

[0018]

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

The paint of the present invention is characterized by using a pigment which absorbs in the visible region and reflects in the near-infrared region (hereinafter referred to as a dark-color 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 high reflectivity, there is no absorption of heat energy, so that a rise in the temperature of the coating film can be prevented. Therefore, thermal deterioration of the coating film can be suppressed.

As the above-mentioned deep-color reflective pigment, any pigment that 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 deep-color reflective pigment in the paint can be appropriately set in consideration of the use of the paint, weather resistance, and the like. Cannot sufficiently fulfill the role of, and deterioration of the undercoating or the like is liable to occur. Conversely, if the content is large, the coating film becomes brittle and the cost becomes high. ~ 110 parts by weight are preferred.

Further, the heat-shielding paint of the present invention 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 reflective pigment, it is possible to obtain excellent weather resistance of the entire coating film.

Specific examples of the above-mentioned 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 paint of the present invention includes, in addition to the above-mentioned dark reflective pigment, at least one or more coloring pigments excluding conventional black pigments such as carbon black and iron black, and a white pigment (hereinafter referred to as a coloring pigment, etc.). ). 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 coloring pigment, various pigments which are usually used can be applied, and 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 pigments such as titanium oxide and zinc white can be used as appropriate. 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 based on 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 from 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 for forming a paint can be set according to the kind and use of the paint, and is not particularly limited. Preferably, the particles are dispersed so that the diameter is 50 μm or less, and most preferably 10 μm or less. 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 used 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 of the present invention may contain an aggregate having a reflecting function and a heat insulating function, in addition to the pigment and the vehicle described above. Specific examples of the aggregate include hollow particles such as shirasu balloons, polystyrene balloons, and ceramic balloons. Since these aggregates have a reflecting function and a heat insulating function, they can further improve the heat shielding property and the weather resistance of the coating film in combination with the above-mentioned deeply colored reflecting pigment.

Among the above-mentioned additives, a ceramic balloon made of silicon boride or the like is preferably used because it can reflect sunlight and the like in its surface layer and shell, is hollow, and has excellent heat insulating properties. 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 paint of 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.

The material to which the above paint is applied is not particularly limited, and various materials such as wood, concrete, asbestos, metal and resin can be selected. The application of the coating can be applied to a place where it is desired to provide a heat shielding function, for example, a house, a factory, a building such as a cold storage warehouse, a car,
Roofs, ceilings, outer walls, inner walls, and the like of structures such as transportation vehicles such as trains, benches, and refrigerated vehicles, storage tanks, and tankers.

The method of coating may be appropriately selected according to the purpose, and specific examples include brush coating, roller coating, spraying, and roll coater coating. Depending on the object to be applied, electrostatic coating, curtain coating, dipping, and the like can also be applied. Further, the method of drying after application to form a coating film can be appropriately selected depending on the properties of the coating material, such as natural drying and baking.

The thickness of the coating film can be appropriately set depending on the properties of the coating material and the material, but is preferably applied so as to be 8 μm or more, more preferably 10 μm or more. When the thickness is 8 μm or less, the concealing power is insufficient, and when the ceramic balloon is contained, the balloon tends to be unevenly distributed so that sufficient heat shielding performance cannot 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 coating material of the present invention to a material, an undercoat can be applied in advance. The undercoating is performed for the purpose of preventing rust, improving the adhesion to the material of the paint of the present invention, 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 material, type of overcoat, required performance, and the like.
By applying the undercoat, the adhesion of the paint of the present invention is enhanced, the durability of the coating film is improved, and the application range of the overcoat can be expanded.

Further, after applying the coating material of the present invention, an overcoating such as a stain prevention clear can be applied. The overcoating can improve the adhesion of the coating film, the water resistance, etc., and can prevent the contamination by dust in the atmosphere and prevent the solar reflectance from lowering. 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. Further, the thickness of the overcoat is not particularly limited as long as it can completely cover the coating material of the present invention, 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.

[0042]

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

1. Raw materials Table 1 shows the raw materials of the coating materials produced in the examples.

[0044]

[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.

[0046]

[Table 2]

(2) G1 to G8, resin, etc. were mixed in the proportions shown in Table 3 and paint samples P1 to P3, C1, and C
2 was obtained.

[0048]

[Table 3]

3. Production of Test Plate A test plate was produced using the coating materials shown in Tables 2 and 3 and under the conditions for producing a coated plate shown in Table 4. The undercoat paint is composed of an epoxy urethane resin, titanium oxide, a rust preventive pigment, and an extender pigment. The top coat is P3 in Table 3. Further, the coating method was performed using a bar coater, and the baking was performed using an electric convection oven. The printing conditions are as follows. Undercoat Furnace temperature 150 ° C x 15 minutes Main paint Furnace temperature 150 ° C x 20 minutes Clear Furnace temperature 150 ° C x 20 minutes

4. Test method (1) Reflectance chart The wavelength dependence of the reflectance was measured using a spectrophotometer. The measurement results are shown in FIGS. (2) Solar reflectance The solar reflectance of the coating film 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) 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. (4) Coated plate temperature The coated plate temperature by lamp irradiation was measured. First, a U-shaped coated plate 1 as shown in FIG. 13 is molded, and two molded products are arranged in the width direction.
Irradiation from a height of mm. In addition, a, b, and c in FIG. 13 represent the dimensions of the molded product, and a = 220 mm,
b = 110 mm and c = 45 mm. The temperature of the coated plate was measured by a temperature sensor 2 attached to the center of the back side of the coated plate.
Since the temperature becomes 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. (5) QUV 1900 hours Δ after irradiation with accelerated exposure tester QUV for 1900 hours
E ^* was measured. Table 4 shows the measurement results. (6) Carbon contamination test A 5% aqueous solution of carbon pigment is applied to the coating film, left at 20 ° C. for 24 hours, and gently rubbed with a sponge scrub while washing with water to remove carbon. The color difference before and after the test was measured as ΔL ^* value. Table 4 shows the measurement results. (7) 5% NaOH test The test plate was immersed in a 5% NaOH aqueous solution at 20 ° C. for 24 hours, and the state of the coating film thereafter was observed. The observation results were evaluated according to the following criteria. ○ There is no abnormality △ There is some blister on the coating film × There is remarkable blister on the coating film Observed. The results were evaluated according to the following criteria. ◎ Good without balloon surface floating ○ Good balloon surface floating but no problem in practicality × Balloon surface floating and practically problematic

[0051]

[Table 4]

[Table 5]

From the above results, the paint of the present invention has a coating plate temperature of 10 ° C. as compared with the case where a conventional black pigment is used.
The QUV measurement revealed that the weather resistance was excellent. This is suggested from the fact that the paint of the present invention has a large reflectance in the near infrared region of the reflectance chart.

It is clear that the inclusion of the ceramic balloon and the structure-retaining agent improves the reflection performance and the weather resistance, as can be seen from E12 and E13 in Table 4.

Further, in Table 4, E7 and E8, and E9 and E1
It is clear from comparison with No. 1 that the application of a top coat such as a stain prevention clear improves the stain resistance, weather resistance and the like.

Further, from E16 in Table 4, it is clear that when iron is used as the dispersion medium, the heat shielding property deteriorates.

It is also apparent from Table 5 that the structure-retaining agent prevents the balloon from floating and greatly improves the storage stability.

[0057]

As described above, according to the present invention, it is possible to obtain a paint having excellent reflection characteristics in the near-infrared region and a low heat energy absorption, which is excellent in weather resistance, while being black or a dark color close thereto. Was. The coating method of the present invention
The excellent weather resistance of the paint can be most effectively brought out.

[Brief description of the drawings]

FIG. 1 is a graph showing the wavelength dependence of the reflectance of a sample E1.

FIG. 2 is a graph showing the wavelength dependence of the reflectance of a sample E2.

FIG. 3 is a graph showing the wavelength dependence of the reflectance of a sample E3.

FIG. 4 is a graph showing the wavelength dependence of the reflectance of sample E4.

FIG. 5 is a graph showing the wavelength dependence of the reflectance of Sample E5.

FIG. 6 is a graph showing the wavelength dependence of the reflectance of sample E6.

FIG. 7 is a graph showing the wavelength dependence of the reflectance of Sample E7.

FIG. 8 is a graph showing the wavelength dependence of the reflectance of Sample E12.

FIG. 9 is a graph showing the wavelength dependence of the reflectance of Sample E13.

FIG. 10 is a graph showing the wavelength dependence of the reflectance of Sample E14.

FIG. 11 is a graph showing the wavelength dependence of the reflectance of Sample E15.

FIG. 12 is a graph showing the wavelength dependence of the reflectance of Sample E16.

FIG. 13 is a diagram showing a method of irradiating a lamp.

[Explanation of symbols]

 1 Coated plate 2 Temperature sensor a Dimension of molded product b Dimension of molded product c Dimension of molded product

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09D 133/02 C09D 133/02 133/04 133/04 143/04 143/04 161/28 161/28 167 / 00 167/00 175/04 175/04 (72) Inventor Noriyasu Noda 4-1-1, Higashiogu, Arakawa-ku, Tokyo Inside Nagashima Special Paint Co., Ltd. No. 12 Housetech Co., Ltd. F-term (reference) 4D075 CA18 EC13 EC35

Claims (13)

[Claims] 1. A heat-shielding paint comprising a pigment which absorbs in the visible region and reflects in the near-infrared region and a vehicle having excellent weather resistance. 2. The pigment has a solar reflectance of 15% or more as defined in JIS A 5759, and has a CIE
The heat-shielding paint according to claim 1, wherein the pigment has an L ^* value of 24 or less in a 1976 L ^* a ^* b ^* color space. 3. The heat-shielding paint according to claim 1, wherein the content of the pigment is 7 to 110 parts by weight based on 100 parts by weight of the resin solid content of the paint. 4. In addition to the pigment, JIS A 575
The heat-shielding paint according to any one of claims 1 to 3, further comprising at least one color pigment having a solar reflectance of 12% or more as defined in No. 9, and optionally a white pigment. 5. The resin according to claim 1, wherein the content of the pigment, the color pigment, and the white pigment is 1% of the resin solid content of the paint.
7 to 110 parts by weight, 7 to
The heat-shielding paint according to claim 4, wherein the amount is 110 parts by weight and 40 to 230 parts by weight. 6. The heat-shielding paint according to claim 4, wherein the white pigment is a titanium oxide pigment. 7. The heat-shielding paint according to claim 1, wherein the pigment is dispersed in the paint to have an average particle size of 50 μm or less. 8. The heat-shielding paint according to claim 1, wherein the pigment is dispersed using a dispersion medium other than iron. 9. The heat-shielding paint according to claim 8, wherein the dispersion medium other than iron is glass beads. 10. The heat-shielding paint according to claim 1, further comprising an aggregate having a reflecting function or a heat insulating function. 11. The heat-shielding paint according to claim 1, further comprising a ceramic balloon and a structure-retaining agent. 12. A vehicle having excellent weather resistance includes at least one of an acrylic resin, a polyester resin, a silicon-modified polyester resin, a silicon-modified acrylic resin, an alkyd resin, a vinyl chloride resin, and a fluororesin, and if necessary, an isocyanate. And at least one melamine resin.
12. The heat-shielding paint according to any one of claims 11 to 11. 13. The heat-shielding paint according to claim 1, wherein the heat-shielding paint is applied so that the coating thickness becomes 8 μm or more, and undercoating and / or overcoating is applied as necessary. Painting method.