JP6844921B2 - Heat shield material, heat shield composition, heat shield film and heat shield building material - Google Patents

Description

The present invention relates to a heat shield material, a heat shield composition, a heat shield film, and a heat shield building material.

Conventionally, attempts have been made to suitably suppress an increase in surface temperature due to irradiation with sunlight or the like by providing a heat shield film on the surface of electronic parts such as the back sheet of a solar cell or the outer wall of a building. Has been done.

For example, as a heat shield material that reflects near-infrared light to shield heat, a compound containing Cr such as Cu—Cr composite oxide and Fe—Cr composite oxide (for example, Patent Document 1 (Japanese Unexamined Patent Publication No. 2000-246439)). (See Gazette), etc.) is known, and it is said that a heat shield film formed of these heat shield materials can preferably shield heat.

Japanese Unexamined Patent Publication No. 2000-264639

However, a heat shield material containing Cr is generally difficult to use in consideration of the environment, and is used as a heat shield material because the manufacturing process is complicated and the manufacturing cost tends to be high, and the raw material cost is high. In that case, the cost tends to be high, and it is difficult to use it in large quantities for general-purpose products.

In addition, since a blackish heat shield film generally easily absorbs heat, it is difficult to use a carbon-based material as a heat shield material. Therefore, when selecting a constituent material of the heat shield material, a material is used. There was a tendency to narrow the range of choices even further.

Therefore, an object of the present invention is to provide a black heat-shielding material which is inexpensive and has excellent heat-shielding properties, and also provides a heat-shielding composition, a heat-shielding film, and a heat-shielding building material containing the heat-shielding material. To do.

Under such circumstances, the present inventors have diligently studied and have come up with the idea of using petroleum coke as the above-mentioned heat shield material.
Since petroleum coke is classified as a carbon-based material, it has been thought that it cannot be used in fields where heat insulation is required. On the other hand, as a result of examination by the present inventors, etc., surprisingly, the composition containing the pulverized petroleum coke containing a specific amount of volatile matter has excellent heat-shielding property even though it exhibits a black color. We have found that it can be exerted and can be effectively used as an inexpensive heat shield, and have completed the present invention based on this finding.

That is, the present invention
(1) A heat shield material comprising a crushed petroleum coke having a volatile content of 4 to 20% by mass.
(2) The heat shield material according to (1) above, wherein the sulfur content of the crushed petroleum coke is 0.1 to 12% by mass.
(3) The heat shield material according to (1) or (2) above, wherein the true density of the pulverized petroleum coke is 1.2 to 2.0 g / cm ^3.
(4) The heat shield material according to any one of (1) to (3) above, wherein the pulverized petroleum coke has a brightness of 25 or less and a reflectance of 10% or more at a wavelength of 2000 nm.
(5) The heat shield material according to any one of (1) to (4) above, wherein the crushed petroleum coke is composed of a pyrolyzed residue of the pyrolyzed raw material oil, which is dried at 50 to 500 ° C.
(6) A heat-shielding composition comprising the heat-shielding material according to any one of (1) to (5) above, and at least one selected from a solvent and a resin.
(7) A heat-shielding film comprising the heat-shielding material according to any one of (1) to (5) above, and (8) a heat-shielding film according to any one of (1) to (5) above. A heat-shielding building material, which is characterized by containing a heat material,
Is to provide.

According to the present invention, it is possible to provide a black heat-shielding material which is inexpensive and has excellent heat-shielding properties, and also provides a heat-shielding composition, a heat-shielding film, and a heat-shielding building material containing the heat-shielding material. ..

First, the heat shield material (material having a heat shield function) according to the present invention will be described.
The heat shield material according to the present invention is characterized by being composed of a pulverized petroleum coke having a volatile content of 4 to 20% by mass.
In the heat shield material according to the present invention, petroleum coke is produced by thermally decomposing the thermal decomposition raw material oil produced in the petroleum refining process with a thermal decomposition apparatus, and a light component is collected by the above thermal decomposition treatment. It means a residue remaining afterwards, and the petroleum coke crushed product means the above-mentioned petroleum coke crushed product.

In the heat shield material according to the present invention, the volatile content of the pulverized petroleum coke is 4 to 20% by mass, preferably 5 to 19% by mass, and more preferably 6 to 18% by mass.
When the volatile matter is within the above range, the irradiation light including near infrared rays can be easily reflected and the desired heat shielding effect can be easily exhibited.

Conventionally, the volatile content of crushed petroleum coke varies depending on the composition of the raw material oil at the time of petroleum coke production and the thermal decomposition conditions, and may also vary depending on the drying and firing treatment conditions after being taken out from the thermal decomposition apparatus. The relationship between the content and the properties of petroleum coke crushed products, especially the relationship with the heat-shielding properties, has not been paid attention to.
However, according to the study by the present inventors, when the volatile content of the petroleum coke crushed product is within a specific range, a high photorefractive index such as a naphthyl group or a phenyl group is exhibited on the surface of the petroleum coke crushed product. We have found that a certain amount of functional groups are present, and these functional groups exert a reflective effect on irradiation light including near infrared rays and are useful as a heat shield, and completed the present invention based on this finding. It came to be done.

In this application document, the volatile content means a value measured in accordance with JIS M 8812.

In the heat shield material according to the present invention, the sulfur content of the pulverized petroleum coke is preferably 0.1 to 12% by mass, more preferably 0.4 to 11% by mass, and 5 to 10% by mass. Is more preferable.
Since the sulfur content in the petroleum coke crushed product, that is, the sulfur atom and the thiol group also have a high refractive index, the sulfur content of the petroleum coke crushed product is within the above range, so that the irradiation light including near infrared rays is emitted. It exhibits a high refractive index, preferably exhibits a light reflection effect, and can easily exhibit a desired heat shielding effect.
In this application document, the sulfur content of crushed petroleum coke means a value measured in accordance with JIS M 8819.

In the heat shield material according to the present invention, the hydrogen content of the pulverized petroleum coke is preferably 1.0 to 5.0% by mass, more preferably 2.0 to 5.0% by mass. It is more preferably 2.0 to 4.0% by mass.
In this application document, the hydrogen content means a value measured in accordance with JIS M 8813.

In the heat shield material according to the present invention, the carbon content of the pulverized petroleum coke is preferably 80 to 95% by mass, more preferably 80 to 93% by mass, and 80 to 90% by mass. Is even more preferable.
Further, in the heat shield material according to the present invention, the nitrogen content of the crushed petroleum coke is preferably 0.1 to 3.0% by mass, more preferably 0.2 to 2.9% by mass. It is preferably 0.3 to 2.8% by mass, and more preferably 0.3 to 2.8% by mass.
Further, in the heat shield material according to the present invention, the fixed carbon content of the pulverized petroleum coke is preferably 70 to 95% by mass, more preferably 72 to 93% by mass, and 75 to 90% by mass. Is more preferable.
In this application document, the carbon content and the nitrogen content mean the values measured according to JIS M 8813, and the fixed carbon content means the values measured according to JIS M 8812.

In the heat shield material according to the present invention, in the pulverized petroleum coke, the ratio (H / C molar ratio) of the atomically converted molar number of the hydrogen content to the atomically converted molar number of the carbon content is 0.1. It is preferably ~ 1.0, more preferably 0.2 to 0.9, and even more preferably 0.2 to 0.8.
When the H / C molar ratio is within the above range, the petroleum coke pulverized product tends to contain a functional group such as a naphthyl group having a large light refractive index on the surface, so that the desired light reflectance can be easily exhibited. it can.
In this application document, the H / C molar ratio can be calculated from the atomically converted number of moles of hydrogen content with respect to the atomically converted number of moles of carbon content measured in accordance with JIS M 8813.

In the heat shield material according to the present invention, the ash content of the crushed petroleum coke is preferably 0.5% by mass or less, more preferably 0.4% by mass or less, and 0.3% by mass or less. Is even more preferable.
In the application documents, the ash content means a value measured in accordance with JIS M 8812.

In the heat shield material according to the present invention, the water content of the pulverized petroleum coke is preferably 0.5% by mass or less, more preferably 0.4% by mass or less, and 0.3% by mass or less. Is even more preferable.
In this application document, water content means a value measured in accordance with JIS M 8812.

In thermal material barrier according to the present invention, the true density of petroleum coke pulverized product is preferably 1.2~2.0cm ³ / g, more preferably 1.3~1.8cm ³ / g , 1.4 to 1.7 cm ³ / g, more preferably.
When the true density of the crushed petroleum coke is within the above range, the density difference with the base material becomes small when preparing the heat-shielding composition and the heat-shielding building material described later, and good dispersibility without causing sedimentation and the like. It is possible to easily form a homogeneous heat-shielding film, heat-shielding building material, or the like.
In this application document, the true density of crushed petroleum coke can be measured according to ATSM D2840.

In the heat shield material according to the present invention, the 50% particle size (D50) of the pulverized petroleum coke is preferably 20 μm or less, more preferably 10 μm or less, further preferably 7 μm or less, and 5 μm. The following is more preferable.
The lower limit of D50 is not particularly limited, but is usually 0.1 μm or more.
In the heat shield material according to the present invention, the 10% particle size (D10) of the pulverized petroleum coke is preferably 0.01 μm or more, more preferably 0.02 μm or more, and more preferably 0.03 μm or more. Is even more preferable.
The upper limit of D10 is not particularly limited, but is usually 5 μm or less.
In the heat shield material according to the present invention, the 90% particle size (D90) of the pulverized petroleum coke is preferably 100 μm or less, more preferably 80 μm or less, further preferably 60 μm or less, and even more preferably 50 μm. The following is more preferable.
The lower limit of D90 is not particularly limited, but is usually 1 μm or more.

In the heat shield material according to the present invention, when D50, D10 and D90 of the petroleum coke crushed product satisfy the above specifications, the dispersibility is easily improved at the time of preparing the heat shield composition, the heat shield building material and the like described later. Therefore, a homogeneous heat shield film, heat shield building material, or the like can be easily formed.

In the heat shield material according to the present invention, the following formula (1):
Span = (D90-D10) / D50 (1)
The span represented by is preferably 0.3 to 7.0, more preferably 0.3 to 6.5, and even more preferably 0.3 to 6.0.
Since the span calculated by the formula (1) is within the above range, the compounding conditions of the heat shield material can be easily designed when preparing the heat shield composition, the heat shield building material, etc., which will be described later, and the heat shield material can be easily designed. It is possible to easily provide a uniform heat-shielding film, heat-shielding building material, or the like, which has excellent dispersibility.

In the documents of this application, D50, D10 and D90 of the pulverized petroleum coke are each the integrated particle size 50 obtained by the volume frequency particle size distribution measurement measured by the laser diffraction scattering type particle size distribution measuring device based on JIS Z 8825. %, The integrated particle size is 10%, and the integrated particle size is 90%.

In the heat shield material according to the present invention, the lightness (L ^* ) of the pulverized petroleum coke is preferably 25 or less, more preferably 23 or less, and further preferably 20 or less.
The lower limit of the brightness (L ^* ) is not particularly limited, but is usually 5 or more.
In the heat shield material according to the present invention, a certain amount of functional groups such as naphthyl groups and phenyl groups exhibiting a high photorefractive index are present on the surface of the pulverized petroleum coke, and these functional groups have a reflection effect on near infrared rays and the like. It is considered that it is useful as a heat shield material and can easily exhibit excellent blackness, and the lightness (L ^* ) of the petroleum coke crushed product satisfies the above regulation, so that the color development property is exhibited. A heat-shielding film or a heat-shielding building material having excellent (blackness) can be easily formed.
In this application document, the lightness (L ^* ) means a value calculated according to JIS 8781-4 measured by using a color meter (ZE6000 manufactured by Nippon Denshoku Kogyo Co., Ltd.) conforming to JIS Z 8722.

In the heat shield material according to the present invention, the light reflectance of the pulverized petroleum coke product at a wavelength of 2000 nm is preferably 10% or more, more preferably 15% or more, still more preferably 20% or more. , 25% or more is more preferable.
The upper limit of the light reflectance of the petroleum coke pulverized product at a wavelength of 2000 nm is not particularly limited, but is usually 70% or less.

Further, in the heat shield material according to the present invention, the light reflectance of the pulverized petroleum coke product at a wavelength of 1500 nm is preferably 8% or more, more preferably 10% or more, and more preferably 12% or more. It is more preferably 14% or more, and even more preferably 14% or more.
The upper limit of the light reflectance of the pulverized petroleum coke product at a wavelength of 1500 nm is not particularly limited, but is usually 60% or less.

Further, in the heat shield material according to the present invention, the light reflectance of the pulverized petroleum coke product at a wavelength of 1000 nm is preferably 3% or more, more preferably 4% or more, and more preferably 5% or more. It is more preferably 7% or more, and even more preferably 7% or more.
The upper limit of the light reflectance of the pulverized petroleum coke product at a wavelength of 1000 nm is not particularly limited, but is usually 50% or less.

In the heat shield material according to the present invention, when the light reflectance of the pulverized petroleum coke product at wavelengths of 2000 nm, 1500 nm, and 1000 nm satisfies the above-mentioned regulations, the desired heat shield performance can be easily exhibited.

In the documents of this application, the light reflectance of the pulverized petroleum coke at wavelengths of 2000 nm, 1500 nm, and 1000 nm is determined by an ultraviolet-visible near-infrared spectrophotometer (V-570 manufactured by JASCO Corporation) and an integrating sphere device (JASCO Corporation (JASCO Corporation) It means a value measured by INS-470) manufactured by JASCO Corporation.

As described above, in the present application documents, petroleum coke is produced by thermally decomposing the thermal decomposition raw material oil obtained in the petroleum refining process with a thermal decomposition apparatus, and after collecting the light component by the above thermal decomposition treatment. It means a residual residue, and the petroleum coke crushed product means the above-mentioned petroleum coke crushed product.

Examples of the pyrolyzed raw material oil to be pyrolyzed include atmospheric distillation residual oil after atmospheric distillation of crude oil, vacuum distillation residual oil after vacuum distillation of atmospheric distillation residual oil, and atmospheric distillation residual oil. Examples thereof include a mixed oil of a vacuum distillation residual oil, and a mixed oil of one or more of the atmospheric distillation residual oil and the vacuum distillation residual oil and another hydrocarbon oil (1).

The atmospheric distillation residual oil related to the pyrolysis raw material oil is not particularly limited as long as it is the residual oil after the crude oil is distilled at atmospheric pressure and the evaporated fraction is separated. The vacuum distillation residual oil related to the pyrolysis raw material oil is not particularly limited as long as it is the residue after the atmospheric distillation residual oil is distilled under reduced pressure to separate the evaporated fraction.
The pyrolysis raw material oil may be a mixed oil of atmospheric distillation residual oil and vacuum distillation residual oil. When the thermal decomposition raw material oil is a mixed oil of the atmospheric distillation residual oil and the vacuum distillation residual oil, the mixing ratio of the atmospheric distillation residual oil and the vacuum distillation residual oil is not particularly limited and may be appropriately adjusted.

The crude oil used as a raw material for distillation of atmospheric distillation residual oil is not particularly limited, and the crude oil types include, for example, Arabian Heavy, Arabian Medium, Arabian Light, Arabian Extra Light, Kuwait, Basra, Oman, Marvan, and Mubaras Blend. , Zakum, Upper Zakum, Qatar Land, Qatar Marine, Umshaif, Silly, Kafuji, Espo and the like, and may be any one type or a combination of two or more types.

The thermal decomposition raw material oil is a mixture of one or more of the atmospheric distillation residual oil and the vacuum distillation residual oil and another hydrocarbon oil (1), that is, the atmospheric distillation residual oil and the other hydrocarbon oil. Mixed oil with (1), mixed oil of vacuum distillation residual oil and other hydrocarbon oil (1), or mixed oil of atmospheric distillation residual oil, vacuum distillation residual oil and other hydrocarbon oil (1) It may be.
When the thermal decomposition raw material oil is a mixed oil of one or more of atmospheric pressure distillation residual oil and vacuum distillation residual oil and another hydrocarbon oil (1), the other hydrocarbon oil (1) is the present invention. Any hydrocarbon oil may be used as long as it exhibits the effect of the above, and examples thereof include slurry oils for fluid contact decomposition treatment, ethylene cracker residual oils, and the like.

The thermal decomposition treatment temperature of the thermal decomposition raw material oil is preferably 490 to 510 ° C, more preferably 495 to 505 ° C. The pressure (gauge pressure) for the thermal decomposition treatment of the thermal decomposition raw material oil is preferably 0.01 to 0.6 MPaG, more preferably 0.05 to 0.4 MPaG.
The pyrolysis treatment atmosphere of the pyrolysis feedstock is usually steam, and if excessive foaming is observed during the pyrolysis treatment of the pyrolysis feedstock, a defoaming agent may be added. As the defoaming agent, a silicon-based defoaming agent or the like can be generally used.

The petroleum coke produced by the thermal decomposition treatment of the thermal decomposition raw material oil is crushed by a water jet or the like after the thermal decomposition treatment, and is taken out from the thermal decomposition apparatus. The petroleum coke taken out from the pyrolysis apparatus includes a petroleum coke generally called shot coke having a granular shape and a sponge coke generally having a large porous shape, which constitutes the heat shield material according to the present invention. The crushed petroleum coke to be produced may be composed of the above-mentioned shot coke, sponge coke, or a mixture thereof.

The sulfur content of the petroleum coke is preferably 0.1 to 12% by mass, more preferably 0.4 to 11% by mass, and even more preferably 5 to 10% by mass.
When the sulfur content of the petroleum coke is within the above range, the petroleum coke crushed product obtained by further pulverizing and drying the petroleum coke easily reflects the irradiation light including near infrared rays and is desired. The heat shield effect can be easily exhibited.
In this application document, the sulfur content of petroleum coke is measured by measuring the mass of petroleum coke in a dry state obtained by drying petroleum coke at 200 ° C. ± 10 ° C. for 4 hours (according to JIS M 8811). It means a value calculated in accordance with JIS M 8819 based on the mass of dry petroleum coke. That is, in the present application documents, the sulfur content of petroleum coke means the mass ratio of the sulfur content present in the dry petroleum coke.

The hydrogen content of the petroleum oil coke is preferably 1 to 10% by mass, more preferably 1 to 8% by mass, and even more preferably 2 to 5% by mass.

The carbon content of the petroleum coke is preferably 80 to 90% by mass, more preferably 80 to 88% by mass, and even more preferably 80 to 85% by mass.
The nitrogen content of the petroleum coke is preferably 0.1 to 3% by mass, more preferably 0.3 to 2.5% by mass, and further preferably 0.5 to 2% by mass. preferable.
The fixed carbon content of the petroleum coke is preferably 70 to 95% by mass, more preferably 72 to 93% by mass, and even more preferably 75 to 90% by mass.

The petroleum coke preferably has a ratio (H / C molar ratio) of the number of moles of the hydrogen content converted to atoms to the number of moles of the carbon content converted to atoms of 0.1 to 1.0. It is more preferably 0.2 to 0.9, and even more preferably 0.2 to 0.8.

The ash content of the petroleum coke is preferably 0.5% by mass or less.
It is more preferably 0.4% by mass or less, and further preferably 0.3% by mass or less.

The volatile content of the petroleum coke is preferably 6 to 20% by mass, more preferably 7 to 19% by mass, and even more preferably 8 to 18% by mass. When the volatile content of petroleum coke is within the above range, the petroleum coke crushed product obtained by further crushing and drying the petroleum coke easily reflects the irradiation light including near infrared rays to block it as desired. The thermal effect can be easily exerted.

In the heat shield material according to the present invention, the crushed petroleum coke is, for example, dried and then crushed the petroleum coke taken out from the pyrolyzer, or crushed the petroleum coke taken out from the pyrolyzer. , Then it can be obtained by drying.

The drying temperature of the petroleum coke is preferably 50 ° C. to 500 ° C., more preferably 70 ° C. to 400 ° C., further preferably 80 ° C. to 300 ° C., further preferably 100 to 250 ° C., and even more preferably 100 to 200 ° C. ..
If the drying temperature is less than 50 ° C., the water content tends to be high, and if it exceeds 500 ° C., the drying cost is significantly increased, and naphthyl groups, phenyl groups, etc. existing on the surface of petroleum coke are added. Functional groups exhibiting a high light refractive index are likely to disappear as volatile components, and it becomes difficult to exhibit heat shielding properties due to a desired light reflection effect.
The drying time is appropriately selected, but is preferably 0.5 to 10 hours, more preferably 1 to 8 hours.
The dry atmosphere may be performed by shutting off the oxygen source in an inert gas atmosphere such as nitrogen gas, helium gas, or argon gas, or in the presence of an air atmosphere or a trace amount of oxygen source.

The pulverizing means for pulverizing petroleum coke is not particularly limited, and it may be dry or wet. Further, the number of crushing means, the number of times of crushing, and the like are not particularly limited.
Examples of the crushing means include one or more crushers selected from a jaw crusher, a joylet crusher, a cone crusher, a hammer crusher, a self-made crusher, a ball mill, a roller mill, a high-speed rotary mill, a jet mill and the like.
The pulverization treatment conditions are appropriately selected depending on the average particle size of the target finely pulverized product, other particle size characteristics, pulverization means, the number of pulverizations, and the like. The pulverized product that has been pulverized is classified as necessary.

The heat shield material according to the present invention may contain a trace amount of additives or impurities.
The heat shield material according to the present invention preferably contains 80 to 100% by mass of crushed petroleum coke, more preferably 90 to 100% by mass, and further preferably composed only of crushed petroleum coke. ..

The heat shield material according to the present invention can be effectively used as a filler for a heat shield film provided on the surface of an electronic component or an outer wall, a filler for a heat shield building material such as a pavement material or a block material, and the like.

The petroleum coke crushed product constituting the heat shield material according to the present invention is low because it is obtained by subjecting inexpensive petroleum coke, which was conventionally considered to have low added value, to a simple treatment of crushing and drying. It can be manufactured at a cost.
Therefore, it is possible to provide a heat-shielding material which is inexpensive and has excellent heat-shielding property, color-developing property, and the like.

Next, the heat-shielding composition (composition having a heat-shielding function) according to the present invention will be described.
The heat-shielding composition according to the present invention is characterized by containing the heat-shielding material according to the present invention and at least one selected from a solvent and a resin.

In the heat shield composition according to the present invention, the content of the heat shield material according to the present invention is preferably 0.1 to 80% by mass, more preferably 1 to 70% by mass, and 5 to 60% by mass. It is more preferably 10% by mass, further preferably 10 to 50% by mass, further preferably 15 to 40% by mass, and particularly preferably 20 to 30% by mass.
When the blending amount of the heat-shielding material according to the present invention is within the above range, it is possible to easily provide a heat-shielding composition which is inexpensive and has excellent heat-shielding property and color-developing property.

In the heat shield composition according to the present invention, the details of the heat shield material are as described above.

In the heat-shielding composition according to the present invention, the solvent constituting the heat-shielding composition is water.
One or more selected from an aqueous organic solvent, a volatile organic solvent, and a non-volatile organic solvent can be mentioned, and may be appropriately selected according to the purpose of use.

Examples of the water-soluble organic solvent include one or more selected from alcohols such as ethanol and n-propanol, polyhydric alcohols such as diethylene glycol and glycerin, and pyrrolidone-based solvents.

Examples of the volatile organic solvent include high boiling point and low volatile polyhydric alcohols such as glycerin, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, polyethylene glycol and polypropylene glycol. One or more selected from those monoether products, diether products, esterified products and the like can be mentioned. Specifically, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether and diethylene glycol mono One or more selected from ethyl ether, diethylene glycol monobutyl ether and the like can be mentioned.
Examples of the volatile organic solvent include N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, monoethanolamine, dimethylaminoethanol, diethylaminoethanol, diethanolamine, N-butyldiethanolamine, and tri. One or more selected from nitrogen-containing organic solvents such as isopropanolamine and triethanolamine can be mentioned.

Examples of the non-volatile organic solvent include silicone oils such as dimethyl silicone oil, fluorosilicone oil and amino-modified silicone oil, and one or more selected from fluorine oil, liquid paraffin, glycerin and the like.

Examples of the resin include one or more selected from thermoplastic resins and thermosetting resins, and are not particularly limited. In the case of two or more kinds of mixed resins, a polymer alloy or a polymer blend in which an arbitrarily selected resin is physically or chemically blended in a predetermined composition ratio may be used. Further, the resin may be a modified product, or may be a copolymer in which two or more kinds of monomers are polymerized at a predetermined ratio. Examples of the copolymer include one or more selected from random copolymers, block copolymers, alternating copolymers and graft copolymers.

Examples of the thermoplastic resin include polyolefin resins, polyarylene sulfide resins, polyoxymethylene resins, polyamide resins, polyimide resins, polyester resins, polyether resins, acrylic resins, butyral resins, polyurethane resins, alkyd resins, and celluloses. , Polyvinyl alcohol resin, siloxane resin, fluorine-containing polymer, sulfur-containing polymer, styrene resin and the like.

Examples of the polyolefin resin include α-olefin homopolymers, copolymers with dissimilar monomers containing α-olefin as a main component, and polyunsaturated compounds such as conjugated diene or non-conjugated diene with α-olefin. One or more selected from copolymers with acrylic acid, methacrylic acid, vinyl acetate, etc. can be mentioned, and specifically, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene. One or more selected from -4-methyl-1-pentene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, chlorinated polyethylene, polystyrene, acrylonitrile, butadiene, styrene and the like can be mentioned.

Further, as the polyolefin-based resin, for example, there are many α-olefin-based homopolymers, copolymers with dissimilar monomers containing α-olefin as a main component, α-olefin and conjugated diene or non-conjugated diene, and the like. One or more selected from unsaturated compounds, copolymers with acrylic acid, methacrylic acid, vinyl acetate, etc. can be mentioned. Specifically, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-butene can be mentioned. One or more selected from polymers, ethylene-4-methyl-1-pentene copolymers, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, chlorinated polyethylene, polystyrene, acrylonitrile, butadiene, styrene, etc. Can be mentioned.

Examples of the polyamide resin include one or more selected from polyamide 11 (PA11), polyamide 12 (PA12), polyamide 46 (PA46), polyamide 6 (PA6), polyamide 66 (PA66), and the like. One or more selected from PA6 and PA66 are preferable.

Examples of the polyimide resin include one or more selected from polyimide (PI), polyamideimide (PAI), bismaleimide, polyetherimide (PEI) and the like, and one or more selected from PI and PEI are preferable.

Examples of the polyester resin include polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polycyclo, hexane, dimethylene, terephthalate (PCT), polyallylate (PAR), polybutylene terephthalate (PBN), and polyethylene naphthalate (PBN). One or more selected from PEN), liquid crystal polymer (LCP), polycarbonate (PC) and the like can be mentioned, and one or more selected from PBT, PET, PAR, PEN, LCP, PC and the like are preferable.

Examples of the polyether resin include polyacetal (POM), polyethernitrile (PENT), polyetheretherketone (PEEK), polyetherketone (PEK), polyketone (PK), polyetherketoneketone (PEKK), and polyphenylene ether. (PPE), one or more selected from modified PPE and the like can be mentioned, and one or more selected from POM, PENT, PEEK, PEK, modified PPE and the like are preferable.

Examples of the fluorine-containing polymer include polytetrafluoroethylene (PTFE), polytetrafluoroethylene ethylene (tetrafluoroethylene / ethylene copolymer, ETFE), polychlorotrifluoroethylene (PCTFE), and polyfluoroalkyl vinyl ether. One or more selected from (PFA) and the like can be mentioned, and one or more selected from PTFE, PFA and the like are preferable.

Examples of the sulfur-containing polymer include one or more selected from polyphenylene sulfide (PPS), polyethersulfone (PES), polysulfone (PSF) and the like.

Examples of the copolymer include, in addition to the above-mentioned copolymer, one or more selected from acrylate, styrene, acrylonitrile (AAS), acrylonitrile styrene (AS), styrene maleimide, and the like.

On the other hand, examples of the thermosetting resin include one or more selected from epoxy resin, benzoguanamine resin, rosin-modified maleic acid resin, rosin-modified fumaric acid resin, melamine resin, urea resin, isocyanurate resin, phenol resin and the like.

Examples of the epoxy resin include a combination of a main agent such as phenol-based glycidyl ether such as bisphenol A, bisphenol F and phenol novolac, and alcohol-based glycidyl ether such as polypropylene glycol, and a curing agent.
Examples of the curing agent include amine compounds such as aliphatic polyamines, modified aliphatic polyamines, polyamide amines, polyamides, alicyclic polyamines, modified alicyclic polyamines, modified aromatic polyamines, and tertiary amines. These curing agents may be used alone or in combination of two or more.
Further, a reaction accelerator that promotes the reaction between the main agent and the curing agent can also be used.
Examples of the reaction accelerator include phenol, pt-butylphenol, dit-butylphenol, cresol, triphenylphosphine, salicylic acid, triethanolamine and the like. These reaction accelerators may be used alone or in combination of two or more.

The heat-shielding composition according to the present invention may contain additives such as lubricants, plasticizers, antioxidants, ultraviolet absorbers, and various stabilizers, if necessary.

The heat shield composition according to the present invention preferably has a lightness (L ^* ) of 25 or less, more preferably 24 or less, and even more preferably 23 or less.
The lower limit of the brightness (L ^* ) is not particularly limited, but is usually 5 or more.
When the lightness (L ^* ) of the heat-shielding composition satisfies the above-mentioned regulations, it is possible to exhibit a color-developing property (blackness) suitable for the heat-shielding composition.

Examples of the heat-shielding composition according to the present invention include heat-shielding paints and heat-shielding inks.

When the heat-shielding composition according to the present invention is a heat-shielding coating material, the content of the heat-shielding material according to the present invention is preferably 0.3 to 50% by mass, preferably 0.5 to 40% by mass. It is more preferably 5 to 35% by mass, further preferably 10 to 30% by mass, further preferably 15 to 30% by mass, and 20 to 30% by mass. Is particularly preferable. When the blending amount of the heat-shielding material according to the present invention is within the above range, it is possible to easily provide a heat-shielding coating material which is inexpensive and has excellent heat-shielding property and color-developing property.

Examples of the heat-shielding paint according to the present invention include oil-based paints, water-based paints, high-solid paints, powder paints, and the like.

In the documents of the present application, the oil-based paint means a paint containing the heat-shielding material according to the present invention, a resin, and an organic solvent as a main liquid component.
In the documents of the present application, the water-based paint means a paint containing the heat-shielding material according to the present invention, a resin, and water as a main liquid component.
In the documents of the present application, the water-based paint means a water-based paint containing the heat-shielding material according to the present invention, a resin, and water containing a trace amount of an organic solvent as a main liquid component.
In the application documents, the high-solid paint includes a heat-shielding material according to the present invention, and has a high non-volatile content (solid content) at the time of painting (for example, about 15 to 25% higher) than conventional paints. means.
The oil-based paint, the water-based paint, and the high-solid paint include the heat-shielding material according to the present invention, and can be manufactured and used by a general method.

Further, in the application documents, the powder coating material means a powder coating material containing the heat-shielding material according to the present invention, but does not contain an organic solvent or water in the coating material, and is composed only of a coating film-forming component.
The powder coating material means a coating material obtained by cooling a dispersion obtained by uniformly heating and kneading the heat insulating material and the resin according to the present invention, finely pulverizing the dispersion to a predetermined particle size, and classifying the dispersion. The powder coating material can be applied to an object to be coated by using, for example, an electrostatic coating machine.

Examples of organic solvents used in oil-based paints, water-based paints, and high-solid paints include hydrocarbon solvents such as toluene and xylene, ester solvents such as ethyl acetate and butyl acetate, and alcohol solvents such as isopropyl alcohol and butanol. Examples thereof include one or more selected from ketone solvents such as ethyl methyl ketone and isobutyl methyl ketone.

Resins used for oil-based paints, water-based paints, and high-solid paints include vinyl chloride resin, alkyd resin, petroleum resin, phenol resin, acrylic resin, polyamide resin, polyurethane resin, epoxy resin, silicon resin, and fluorine-based resin. One or more selected ones can be mentioned, but the present invention is not limited to these, and any commonly used resin can be appropriately used.

When the powder coating is a thermosetting powder coating, the resin used for the powder coating (resin for forming a coating film) is, for example, an epoxy resin, an epoxy-polyester resin, a polyester resin, or an acrylic resin. , Acrylic-polyester resin, phenol resin, fluorine resin, etc. When the powder coating material is a thermoplastic powder coating material, for example, one or more selected from vinyl-based resin, polyethylene-based resin, polyamide-based resin, fluorine-based resin, modified polyolefin-based resin, and the like can be mentioned.
When a thermosetting resin is used as the coating film forming resin, it is preferable to contain a curing agent and a curing accelerator. As the curing agent and the curing accelerator, those suitable for the resin to be used may be appropriately selected.

The lightness (L ^* ) of the heat-shielding paint is preferably 25 or less, more preferably 20 or less, and even more preferably 19 or less.
The lower limit of the brightness (L ^* ) is not particularly limited, but is usually 5 or more.
When the lightness (L ^* ) of the heat-shielding paint satisfies the above-mentioned regulation, it is possible to exhibit the color development property (blackness) suitable for the heat-shielding paint.

When the heat-shielding composition according to the present invention is a heat-shielding ink, the content of the heat-shielding material according to the present invention is preferably 0.1 to 30% by mass, preferably 0.3 to 25% by mass. More preferably, it is more preferably 0.5 to 20% by mass.
When the blending amount of the heat-shielding material according to the present invention is within the above range, it is possible to easily provide a heat-shielding ink which is inexpensive and has excellent heat-shielding property and color-developing property.

Examples of the heat-shielding ink include oil-based ink, solvent-based ink, and water-based ink.

In the documents of the present application, the oil-based ink means an ink containing the heat-shielding material according to the present invention and a non-volatile organic solvent as a main liquid component.
The non-volatile organic solvent can be appropriately selected from those described above.

In the application documents, the solvent ink means an ink containing the heat shield material according to the present invention and a volatile organic solvent as a main liquid component.
The volatile organic solvent can be appropriately selected from those described above.

In the present application documents, the water-based ink means an ink containing the heat-shielding material according to the present invention and one or more selected from water and a water-soluble organic solvent as main liquid components.
The water-soluble organic solvent can be appropriately selected from those described above.

The brightness (L ^* ) of the heat-shielding ink is preferably 25 or less, more preferably 20 or less, and even more preferably 19 or less.
The lower limit of the brightness (L ^* ) is not particularly limited, but is usually 5 or more.
When the lightness (L ^* ) of the heat-shielding ink satisfies the above-mentioned regulation, it is possible to exhibit the color development property (blackness) suitable for the heat-shielding ink.

According to the present invention, it is possible to provide a heat-shielding composition containing a heat-shielding material which is inexpensive and has excellent heat-shielding properties.

Next, the heat-shielding film (film having a heat-shielding function) according to the present invention will be described.
The heat-shielding film according to the present invention is characterized by containing the heat-shielding material according to the present invention.

The heat-shielding film according to the present invention preferably has a heat-shielding material content of 1 to 99% by mass, more preferably 10 to 90% by mass, and 15 to 80% by mass. Some are even more preferred.
When the blending amount of the heat-shielding material according to the present invention is within the above range, it is possible to easily provide a heat-shielding film which is inexpensive and has excellent heat-shielding property and color-developing property.

The heat shield film according to the present invention preferably has an average thickness of 1 to 100 μm, more preferably 5 to 80 μm, and even more preferably 10 to 50 μm.
The average thickness of the heat-shielding film according to the present invention means an arithmetic mean value when the thickness of the heat-shielding film is measured at six locations with a micrometer.

The heat-shielding film according to the present invention can be easily produced by applying the heat-shielding composition according to the present invention to an object to be treated.

The method for applying the heat-shielding composition according to the present invention is not particularly limited, and for example, the desired thickness can be obtained by applying the heat-shielding composition on the object to be coated with a brush or a spray, or by applying a dipping method or a spin coating method. A method of appropriately drying after forming the coating film can be mentioned.
The above coating and drying treatments may be repeated, and by repeating the coating and drying treatments, a heat shield film having a desired thickness can be easily formed.
Examples of the object to be processed include various electronic parts and outer wall materials.
By the above method, the target heat shield film can be formed.

The heat shield film according to the present invention preferably has a brightness (L ^* ) of 25 or less, more preferably 24 or less, and even more preferably 23 or less.
The lower limit of the brightness (L ^* ) is not particularly limited, but is usually 5 or more.
When the lightness (L ^* ) of the heat-shielding film satisfies the above-mentioned regulation, it is possible to exhibit the color development property (blackness) suitable for the heat-shielding film.

According to the present invention, it is possible to provide a heat-shielding film containing a heat-shielding material which is inexpensive and has excellent heat-shielding properties.

The heat-shielding film according to the present invention is used in fields where heat-shielding properties are required, for example, coating films for outer walls and roofs of buildings, coating films for roads and sideways, coating films for exteriors and interiors of automobiles and railroad vehicles, oil and the like. It can be suitably used as a coating film on the wall of a storage tank, a colored film to be attached to a window glass of a vehicle or a building, a back sheet of a solar cell, or the like.

Next, the heat-shielding building material (building material having a heat-shielding function) according to the present invention will be described.
The heat-shielding building material according to the present invention is characterized by containing the heat-shielding material according to the present invention.

The heat-shielding building material according to the present invention preferably has a heat-shielding material content of 1 to 50% by mass, more preferably 5 to 40% by mass, and 10 to 30% by mass. Some are even more preferred.
When the blending amount of the heat-shielding material according to the present invention is within the above range, it is possible to easily provide a heat-shielding building material which is inexpensive and has excellent heat-shielding property and color-developing property.

As the heat-shielding building material according to the present invention, a mixture obtained by mixing the heat-shielding material according to the present invention with various base materials is formed into a desired shape and heat-treated as appropriate, or the heat-shielding material according to the present invention is applied to various base materials. It can be formed by applying the mixed mixture onto the object to be treated.

Examples of the heat-shielding building material according to the present invention include floor materials, wall materials, roofing materials and the like having heat-shielding properties. Specifically, the heat-shielding material according to the present invention is mixed with the viscosity of the base material. The present invention is applied to a heat-shielding asphalt, a base material, rubber, etc. formed by applying a mixture obtained by mixing the heat-shielding material according to the present invention to a heat-shielding block, a base material, asphalt, etc. A heat-shielding elastic pavement material formed by constructing a mixture obtained by mixing the heat-shielding materials according to the above can be mentioned.
Since these heat-shielding building materials include the heat-shielding material according to the present invention, the temperature of the surface can be easily lowered even when irradiated with sunlight or the like, and when the surface is worn by wind and rain or the like. Even if it has a certain thickness, the heat shielding effect can be maintained for a long period of time.

The heat-shielding building material according to the present invention preferably has a brightness (L ^* ) of 25 or less, more preferably 24 or less, and even more preferably 23 or less.
The lower limit of the brightness (L ^* ) is not particularly limited, but is usually 5 or more.
When the lightness (L ^* ) of the heat-shielding building material satisfies the above-mentioned regulation, it is possible to exhibit the color development property (blackness) suitable for the heat-shielding building material.

According to the present invention, it is possible to provide a heat-shielding building material containing a heat-shielding material which is inexpensive and has excellent heat-shielding properties.

(Example)
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

<Petroleum coke A, petroleum coke B, petroleum coke C and petroleum coke D>
Petroleum coke A and petroleum coke are obtained by pyrolyzing residual oil under reduced pressure and slurry oil as the pyrolysis raw material oil under the conditions of 500 ° C. and 0.1 MPaG, and then pulverizing with a water jet after the pyrolysis treatment. B, petroleum coke C and petroleum coke D were obtained. Table 1 shows the properties of petroleum coke A, petroleum coke B, petroleum coke C and petroleum coke D.

The CHN content representing the content of water, carbon, hydrogen and nitrogen, the H / C molar ratio, the sulfur content, the ash content, the volatile content, and the fixed carbon content shown in Table 1 are as follows. It means the value measured by the method.

(moisture)
Measured according to JIS M 8812.
(CHN minutes, H / C)
Measured according to JIS M 8813.
(Sulfur content)
Measured according to JIS M 8819.
(ash)
Measured according to JIS M 8812.
(Vaporized content)
Measured according to JIS M 8812.
(Fixed carbon content) Measured according to JIS M 8812.

(Example 1)
The above petroleum coke A was dried in a dryer (HOT AIR DRYING OVEN NEW manufactured by Nagano Kagaku Kikai Seisakusho Co., Ltd.) at 100 ° C. for 4 hours in a nitrogen gas atmosphere to obtain a dried product of petroleum coke A.
10 kg of the dried product of petroleum coke A is supplied to a cutter mill (Orient Vertical Crusher manufactured by Orient Crusher Co., Ltd., VM-16K (using a 2 mm screen)) and roughly crushed to 9.5 kg. A crude pulverized product of petroleum coke A was obtained (yield 95% by mass).
Next, the obtained coarsely pulverized coke A was supplied using a jet mill (Jet Mill STJ-200 manufactured by Seishin Co., Ltd.) with a supply amount of 10 kg, a push nozzle pressure of 0.64 MPa, and a crush nozzle pressure of 0.64 MPa. By treating under the condition of a speed of 4 kg / hour, a heat shield 1 made of 5 kg of pulverized petroleum coke was obtained (yield 50% by mass). Table 2 shows the properties of the obtained crushed petroleum coke (heat shield 1).

The CHN content, H / C molar ratio, sulfur content, ash content, volatile content, and fixed carbon content, which indicate the contents of water, carbon, hydrogen, and nitrogen in Table 2, are the above-mentioned petroleum coke A to petroleum coke D. It means a value measured by the same method. The true density, particle size characteristics, reflectance, and hue in Table 2 mean values measured by the following methods.
(True density)
Measured according to ATSM D2840.
(Particle size characteristics)
The volume frequency particle size distribution was measured by the laser diffraction / scattering method using a laser diffraction / scattering type particle size distribution measuring device (MICROTRAC FRA, manufactured by NIKKISO) based on JIS Z 8825. From the obtained volume frequency particle size distribution measurement results, the particle size of the integrated particle size of 10% (D10), the particle size of the integrated particle size of 50% (D50), and the particle size of the integrated particle size of 90% (D90) were calculated.
(Reflectance)
Using an ultraviolet-visible near-infrared spectrophotometer (V-570 manufactured by JASCO Corporation) and an integrating sphere device (INS-470 manufactured by JASCO Corporation), the measurement wavelength range is 250 nm, 500 nm, 1,000 nm, 1, Spectral reflectances at 500 nm and 2,000 nm were measured.
(Hue)
Color meter conforming to JIS Z 8722 (manufactured by Nippon Denshoku Kogyo Co., Ltd.)
It was measured using ZE6000), and the color index (L ^* , a ^* , b ^* ) was determined according to JIS 8781-4.

(Example 2) The petroleum coke B is dried in a dryer (HOT AIR DRYING OVEN NEW manufactured by Nagano Kagaku Kikai Seisakusho Co., Ltd.) at 100 ° C. for 4 hours in a nitrogen gas atmosphere to dry the petroleum coke B. I got something.
10 kg of the dried product of petroleum coke B is supplied to a cutter mill (Orient Vertical Crusher manufactured by Orient Crusher Co., Ltd., VM-16K (using a 2 mm screen)) and roughly crushed to 9.5 kg. A crude pulverized product of petroleum coke B was obtained (yield 95% by mass).
Next, the obtained coarsely pulverized coke B was supplied using a jet mill (Jet Mill SJ-500 manufactured by Nisshin Engineering Co., Ltd.) with a supply amount of 0.8 kg, a push nozzle pressure of 0.75 MPa, and a crush nozzle pressure of 0. By treating under the conditions of 75 MPa and a supply rate of 4 kg / hour, a heat shield 2 made of 0.7 kg of pulverized petroleum coke was obtained (yield 86% by mass). The properties of the obtained crushed petroleum coke (heat shield 2) were measured in the same manner as in Example 1. The results are shown in Table 2.

(Example 3) A heat shield material 3 made of crushed petroleum coke was obtained in the same manner as in Example 1 except that the drying temperature was changed from 100 ° C. to 500 ° C. (yield 93% by mass). The properties of the obtained crushed petroleum coke (heat shield material 3) were measured in the same manner as in Example 1. The results are shown in Table 2.

(Comparative Example 1)
As the comparative heat shield material 1, a commercially available carbon black (manufactured by Denka Co., Ltd., Denka Black) was used, and its properties were measured in the same manner as in Example 1. The results are shown in Table 3.
Since the comparative heat shield material 1 is produced by firing a carbon material at a high temperature, the volatile content is substantially 0% by mass.

(Comparative Example 2)
The above petroleum coke C is dried at 25 ° C. for 24 hours, and 10 kg is supplied to a cutter mill (Orient Vertical Crusher manufactured by Orient Crusher Co., Ltd., VM-16K (using a 2 mm screen)) for rough crushing. A crude pulverized product of 9.5 kg of petroleum coke C was obtained (yield 95% by mass).
The crude pulverized petroleum coke C is fired at 900 ° C. for 2 hours in a nitrogen gas atmosphere, and then a jet mill (Jet mill SJ-2500 manufactured by Nisshin Engineering Co., Ltd.) is used to supply 9 kg and push nozzle pressure. By treating under the conditions of 0.75 MPa, pulverized nozzle pressure 0.75 MPa, and supply rate 16 kg / hour, a comparative heat shield 2 composed of 7 kg of pulverized petroleum coke was obtained (yield 76% by mass). The properties of the petroleum coke crushed product (comparative heat shield material 2) were measured in the same manner as in Example 1. The results are shown in Table 3.

(Comparative Example 3)
The above petroleum coke D is dried at 25 ° C. for 24 hours, and 50 kg is supplied to a cutter mill (Orient Vertical Crusher manufactured by Orient Crusher Co., Ltd., VM-16K (using a 2 mm screen)) for rough crushing. A crude pulverized product of 47 kg of petroleum coke D was obtained (yield 95% by mass).
The crude pulverized petroleum coke D is fired at 1400 ° C. for 2 hours in a nitrogen gas atmosphere, and then a jet mill (Jet mill SJ-2500 manufactured by Nisshin Engineering Co., Ltd.) is used to supply 20 kg and push nozzle pressure. By treating under the conditions of 0.75 MPa, pulverized nozzle pressure 0.75 MPa, and supply rate 14 kg / hour, a comparative heat shield 3 composed of 15 kg of pulverized petroleum coke was obtained (yield 75% by mass). The properties of the obtained petroleum coke crushed product (comparative heat shield material 3) were measured in the same manner as in Example 1. The results are shown in Table 3.

(Example 4)
Weigh 10 g of polyurethane resin (TA24-503A) manufactured by Hitachi Chemical Co., Ltd. and 20 g of toluene (domestic first grade) manufactured by Domestic Chemical Co., Ltd. in a 100 cc beaker at room temperature, and stir and mix with a stirrer for 5 minutes to make it uniform. Solution was obtained. Then, using a rotation / revolution mixer (Awatori Rentaro ARV-310 manufactured by THINKY Co., Ltd.), 10 g of the heat shield 1 obtained in Example 1 was stirred and mixed with the prepared solution. , A heat shield paint 1 was obtained.
The mass ratio of the polyurethane resin, toluene, and the heat shield material 1 is polyurethane resin: toluene: heat shield material 1 = 10: 20:10. Table 4 shows the heat-shielding performance and hue of the obtained heat-shielding paint 1.

The heat shield performance and hue shown in Table 4 mean values measured by the following methods. (Heat shield performance)
The heat-shielding paint is dropped onto an aluminum plate with a length of 23 cm, a width of 15 cm, and a thickness of 1 mm, and a glass rod with a diameter of 7 mm and a length of 27 cm is pressed to apply the paint horizontally to the aluminum plate. A test coated plate was obtained by preparing the coated plate and then drying it for a whole day and night.
The test coating plate was attached to a window having a diameter of 5 cm installed on the side of a cardboard measuring container having a length of 52 cm, a width of 38 cm, and a depth of 52 cm, and a 100 W incandescent ball was irradiated into the measuring container from a distance of 13 cm from the window. The heat shielding performance was evaluated by measuring the temperature (initial temperature and temperature after 60 minutes) of the aluminum portion on the back side of the attached test coating plate.
(Hue)
The above test coating plate was measured using a color meter conforming to JIS Z 8722 (ZE6000 manufactured by Nippon Denshoku Kogyo Co., Ltd.), and the color index (L ^* , a ^* , b ^* ) was measured according to JIS 8781-4. I asked.

(Example 5)
The heat-shielding paint 2 was obtained in the same manner as in Example 4 except that the heat-shielding material 2 obtained in Example 2 was used instead of the heat-shielding material 1. The heat-shielding performance and hue of the heat-shielding paint 2 were measured in the same manner as in Example 4. The results are shown in Table 4.

(Comparative Example 4)
The comparative heat shield material 1 is used instead of the heat shield material 1, and the mass ratio of the polyurethane resin, toluene, and the comparative heat shield material 1 is set to polyurethane resin: toluene: comparative heat shield material 1 = 10: 70: 5. A comparative thermal barrier coating material 1 was obtained in the same manner as in Example 4. The heat-shielding performance and hue of the comparative heat-shielding paint 1 were measured in the same manner as in Example 4. The results are shown in Table 4.

(Comparative Example 5)
A comparative heat-shielding paint 2 was obtained in the same manner as in Example 4 except that the comparative heat-shielding material 2 was used instead of the heat-shielding material 1. The heat-shielding performance and hue of the comparative heat-shielding paint 2 were measured in the same manner as in Example 4. The results are shown in Table 4.

(Comparative Example 6)
A comparative heat-shielding paint 3 was obtained in the same manner as in Example 4 except that the comparative heat-shielding material 3 was used instead of the heat-shielding material 1. The heat-shielding performance and hue of the comparative heat-shielding paint 3 were measured in the same manner as in Example 4. The results are shown in Table 4.

From Table 2, the heat shields 1 to 3 obtained in Examples 1 to 3 are made of crushed petroleum coke having a volatile content of 4 to 20% by mass. It can be seen that the reflectance in the outer region is high, excellent heat shielding properties can be exhibited even in black, and the hue is sufficient, and excellent color development (blackness) can be exhibited.
This means that, as shown in Table 4, a coating film (heat-shielding film) having a thickness of 25 μm to 37 μm composed of the heat-shielding paint 1 and the heat-shielding paint 2 obtained in Examples 4 and 5 was used for 60 minutes. It is also clear from the fact that the temperature rise after the lapse can be suppressed to 46.9 ° C to 48.5 ° C.
Further, from Table 4, the coating plate using the heat-shielding paint 1 and the heat-shielding paint 2 obtained in Examples 4 and 5 has a brightness (L ^* ) value of 25 or less, and has sufficient color development (black color). It can also be seen that it has a degree).

On the other hand, from Table 3, the comparative heat shield materials 1 to the comparative heat shield materials 3 obtained in Comparative Examples 1 to 3 are not made of crushed petroleum coke (Comparative Example 1), or have a volatile content of 4. Since it is less than mass% (Comparative Examples 2 to 3), it can be seen that the reflectance in the near-infrared region is insufficient and sufficient heat shielding performance cannot be exhibited.
This means that, as shown in Table 4, the coating film made of the comparative heat-shielding paint 1 obtained in Comparative Example 4 has almost the same average thickness as the coating film made of the heat-shielding paint 1 and the heat-shielding paint 2. Despite having (33 μm), the temperature rise after 60 minutes was as high as 53.5 ° C., and the average of the coating materials was similar to that of the coating film made of the comparative thermal barrier coating material 3 obtained in Comparative Example 6. It is also clear from the fact that by increasing the thickness to 50 μm, the temperature rise after 60 minutes can be suppressed to the same level as in Examples 4 and 5 (47.8 ° C.).

According to the present invention, it is possible to provide a black heat-shielding material which is inexpensive and has excellent heat-shielding properties, and also provides a heat-shielding composition, a heat-shielding film, and a heat-shielding building material containing the heat-shielding material.

Claims (8)

A heat shield characterized by being composed of crushed petroleum coke having a volatile content of 4 to 20% by mass. The heat shield material according to claim 1, wherein the sulfur content of the crushed petroleum coke is 0.1 to 12% by mass. The heat shield according to claim 1 or 2, wherein the true density of the pulverized petroleum coke is 1.2 to 2.0 g / cm ^3. The heat shield material according to any one of claims 1 to 3, wherein the pulverized petroleum coke has a brightness of 25 or less and a reflectance of 10% or more at a wavelength of 2000 nm. The heat shield material according to any one of claims 1 to 4, wherein the petroleum coke pulverized product comprises a pyrolyzed raw material oil dry at 50 to 500 ° C.. A heat-shielding composition comprising the heat-shielding material according to any one of claims 1 to 5, and at least one selected from a solvent and a resin. A heat-shielding film comprising the heat-shielding material according to any one of claims 1 to 5. A heat-shielding building material comprising the heat-shielding material according to any one of claims 1 to 5.