CN110511638B - Functional heat-insulating environment-friendly coating material and preparation method thereof - Google Patents
Functional heat-insulating environment-friendly coating material and preparation method thereof Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
- C08K2003/166—Magnesium halide, e.g. magnesium chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention discloses a functional heat-insulating environment-friendly coating material and a preparation method thereof, belonging to the technical field of coatings, wherein the functional environment-friendly coating material comprises the following main raw materials: 15-45% of acrylic resin, 4-18% of titanium dioxide nanotube, 5-22% of heavy calcium carbonate powder, 2-8% of kaolin, 10-20% of hollow filler, 5-14% of silicone resin, 3-12% of silicon carbide powder, 1-5% of magnesium fluoride, 10-30% of water, and a proper amount of dispersing agent, toughening agent, thickening agent and defoaming agent. The preparation method of the coating comprises the following steps: adding titanium dioxide nanotubes, heavy calcium powder and kaolin into water, and uniformly stirring; adding the hollow filler and the acrylic resin, and uniformly stirring; adding silicon carbide powder and magnesium fluoride and stirring uniformly; adding silicon resin, and stirring to obtain the heat-insulating environment-friendly coating material. The thermal insulation of the material is a significant improvement over conventional reflective materials.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a functional heat-insulating environment-friendly coating material and a preparation method thereof.
Background
With the continuous improvement and development of the social industry level of each country, the emission of carbon dioxide is higher and higher, and the global warming and the polar iceberg thawing problems caused by the emission of carbon dioxide threaten all mankind. The increasing exhaust emissions from automobiles and the rapidly increasing power consumption of air conditioners further exacerbate the above problems. How to effectively reduce the surface and internal temperature of buildings, factories, equipment and the like in summer becomes one of important methods for saving commercial electricity, industrial electricity and civil electricity.
The heat-insulating coating material is the first choice of heat-insulating materials due to the advantages of light weight, protection, corrosion resistance, water resistance, attractive appearance and the like. Thermal barrier coating materials can be divided into two categories, the first category reflects most of the solar radiant heat back into the space by reflection, avoiding rapid temperature rise of the coated buildings and equipment facilities. At present, the heat insulation coating materials in the market mainly use the materials, the reflectivity of sunlight is different from 65% to 85%, the heat insulation effect can reach about 15 ℃ at most, and the effect is obvious. The second kind of heat insulating coating material has heat insulating effect lower than that of reflecting coating material, and the heat insulating effect is about 5 deg.c. The radiation heat-insulation coating material has higher requirements on the formula and raw materials, only European and American countries and other scientific and technological strong countries have related products, and the research in the field is less in China. In addition, the optimal radiation wavelength of the radiation type coating material should be limited to 8-13 um, because the radiation type coating material is an atmospheric window, infrared rays in the wave band can penetrate through the atmosphere and enter the space, the infrared rays are prevented from being reflected back to the earth again, and the radiation type coating material has important significance for reducing the earth temperature.
Disclosure of Invention
The invention mainly aims to provide a functional heat-insulating environment-friendly coating material which has the advantages of good heat-insulating property, strong radiation heat-dissipating capacity, good ductility, corrosion resistance, good waterproofness and long service life, and the radiation wavelength range corresponds to an atmospheric window.
The above object of the present invention is achieved by:
a functional heat-insulating environment-friendly coating material mainly comprises the following components in percentage by mass:
15 to 45 percent of water-based acrylic resin,
4 to 18 percent of titanium dioxide nanotube,
5 to 22 percent of coarse whiting powder,
2 to 8 percent of kaolin,
10 to 20 percent of hollow filler,
5 to 14 percent of silicon resin,
3 to 12 percent of silicon carbide powder,
1 to 5 percent of magnesium fluoride,
10 to 30 percent of water,
and one or more (1-10%) of dispersing agent, toughening agent, thickening agent and defoaming agent.
The raw materials are all commercial products.
Optionally, the titanium dioxide nanotubes have a surface area of 340m2/g～420m2The pipe has a size characteristic of 300-1000 nm of pipe length and 20-50 nm of pipe diameter, and is purchased from Aladdin company.
The titanium dioxide nanotube replaces the traditional titanium dioxide, has stronger covering power and large specific surface area (340 m)2/g～420m2And/g), has wider response range (300 nm-500 nm) to the wavelength of sunlight, and can effectively degrade small organic molecules such as benzene, formaldehyde and the like in a closed space.
Among other things, the silicone resin serves to improve the flexibility of the coating. The silicone resin can be used in common.
Preferably, the hollow filler comprises hollow nano ceramic, hollow silicon dioxide, hollow glass beads and hollow zirconia beads, and the mass ratio of the hollow nano ceramic to the hollow silicon dioxide is 55:12:13:20, and the sizes of the hollow nano ceramic, the hollow silicon dioxide, the hollow glass beads and the hollow zirconia beads are 0.5-10 um, 2-14 um, 5-20 um and 50-200 um respectively.
Preferably, the sizes of the silicon carbide powder and the magnesium fluoride powder are limited to 7-10 um. The two materials have a synergistic effect after being mixed, can exert the function of radiating energy outwards, and the average emissivity of the radiation energy with the wavelength of 6-15 um reaches about 0.9.
Among them, silicon carbide powder mainly plays a role of radiating infrared rays, but because of its weak polarity and weak polarity of C — Si bond (covalent bond), the uniform dispersibility in the resin emulsion is greatly affected, and isotropy is difficult to achieve. The magnesium fluoride material has extremely strong polarity (ionic bond), and is compounded with silicon carbide, so that the uniform distribution of silicon carbide powder in the emulsion (the magnesium fluoride wraps the silicon carbide) is realized. More importantly, the magnesium fluoride has very excellent transmittance and low refractive index in the range of 7.5 mu m from vacuum ultraviolet 110nm to infrared, and the magnesium fluoride can realize radiation to the external space in cooperation with most infrared rays radiated to the outside by the silicon carbide.
Preferably, the toughening agent is selected from one or more of acrylate rubber, carboxyl nitrile rubber, chloroprene rubber and chlorosulfonated polyethylene.
Preferably, the dispersant is selected from sodium dodecylbenzene sulfonate or sodium dodecylbenzene sulfonate.
Preferably, the thickener is selected from one or both of diatomaceous earth or bentonite.
Preferably, the dispersing agent is selected from one or more of vinyl bis stearamide, ammonium polyacrylate salt and oxidized polyethylene wax.
The preparation method of the functional heat-insulating environment-friendly coating material comprises the following steps:
firstly, adding silicon carbide and magnesium fluoride into a ball mill, and carrying out ball milling for 5-10 min at a rotating speed of 200-300 r/min to obtain a mixture for later use.
Mixing a proper amount of dispersant and a flexibilizer defoamer, adding deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, adding titanium dioxide nanotubes, heavy calcium carbonate powder and kaolin into water, and stirring at 1200r/min for 10-20 minutes; then adding the hollow filler and acrylic resin, and stirring for 15-30 minutes at 300 r/min; then adding the mixture of the silicon carbide powder and the magnesium fluoride after ball milling, and stirring for 40-60 minutes at a speed of 600 r/min; and finally, adding silicon resin, and stirring for 30-50 minutes at a speed of 500r/min to obtain a final product.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts the titanium dioxide nanotube to replace the conventional titanium dioxide powder, and under the condition of the same other components, the solar reflectivity is improved by 5 percent, and the hemispherical emissivity is improved by 3 percent, so the titanium dioxide nanotube is used in the heat insulation material, and compared with the conventional reflection material, the invention can make remarkable progress.
(2) The titanium dioxide nanotube, the hollow filler, the silicon carbide, the magnesium fluoride and the like are compounded for use, wherein the hollow filler mainly has the effects of reducing the thermal conductivity, the titanium oxide nanotube improves the reflectivity, and the silicon carbide and the magnesium fluoride have the infrared radiation capability.
(3) According to the invention, silicon carbide and magnesium fluoride are mainly selected to improve the infrared radiation capability, the radiation emissivity of the composite material in the wavelength of 6-15 um is high, absorbed heat energy can be radiated in a long wave form, heat can be radiated outwards even at night without the sun, the wavelength band belongs to an atmospheric window, and the infrared rays in the wavelength band can penetrate the atmosphere and enter the space, so that the composite material has a beneficial effect on climate.
Detailed Description
15 to 45 percent of water-based acrylic resin,
4 to 18 percent of titanium dioxide nanotube,
5 to 22 percent of coarse whiting powder,
2 to 8 percent of kaolin,
10 to 20 percent of hollow filler,
5 to 14 percent of silicon resin,
3 to 12 percent of silicon carbide powder,
1 to 5 percent of magnesium fluoride,
10 to 30 percent of water,
proper amount of dispersant, toughening agent, thickener and defoaming agent (2-10%).
Wherein the solid content of the water-based acrylic resin is 45-55%.
Titanium dioxide nanotubes, purchased from Aladdin, having a specific surface area of 340m2/g～420m2The length of the tube is 300-1000 nm, and the diameter of the tube is 20-50 nm.
The hollow filler is prepared by mixing hollow nano ceramic (0.5-10 um), hollow silicon dioxide (2-14 um), hollow glass beads (5-20 um) and hollow zirconia beads (50-200 um) according to a mass ratio of 55:12:13: 20.
Before preparing the functional heat-insulating environment-friendly coating material, adding silicon carbide and magnesium fluoride into a ball mill, ball-milling at the rotating speed of 200-300 r/min for 5-10 min, and obtaining a mixture for later use after ball-milling.
Example 1
A functional heat-insulating environment-friendly coating material comprises the following components in percentage by mass:
mixing a proper amount of dispersing agent, toughening agent and defoaming agent (6%), adding 15% of deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, reducing the rotating speed to 200r/min, adding 10% of titanium dioxide nanotube, 12% of heavy calcium powder and 4% of kaolin, fully stirring, adding 15% of hollow filler and 26% of acrylic resin, adding a mixture of 3% of silicon carbide powder and 2% of magnesium fluoride after uniform mixing, and stirring at 600r/min for 40 minutes; finally, adding silicone resin, and stirring for 30 minutes at 500r/min to obtain a final product.
Example 2
A functional heat-insulating environment-friendly coating material comprises the following components in percentage by mass:
after mixing a proper amount of dispersant, toughening agent and defoaming agent (3%), adding 10% of deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, reducing the rotating speed to 200r/min, adding 18% of titanium dioxide nanotube, 5% of heavy calcium powder and 2% of kaolin, fully stirring, adding 10% of hollow filler and 41% of acrylic resin, after uniformly mixing, supplementing a mixture of 4% of silicon carbide powder and 1% of magnesium fluoride, and stirring at 600r/min for 40 minutes; adding silicone resin, keeping stirring for 30min, adding 1% thickening agent, and stirring for 30min to complete the preparation.
Example 3
A functional heat-insulating environment-friendly coating material comprises the following components in percentage by mass:
mixing a proper amount of dispersing agent, toughening agent and defoaming agent (5%), adding 26% of deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, reducing the rotating speed to 200r/min, adding 6% of titanium dioxide nanotube, 20% of heavy calcium powder and 8% of kaolin, fully stirring, adding 10% of hollow filler and 15% of acrylic resin, adding a mixture of 3% of silicon carbide powder and 1% of magnesium fluoride after uniform mixing, and stirring at 600r/min for 40 minutes; adding silicone resin, keeping stirring for 30min, adding 1% thickening agent, and stirring for 30min to complete the preparation.
Example 4
A functional heat-insulating environment-friendly coating material comprises the following components in percentage by mass:
mixing a proper amount of dispersing agent, toughening agent and defoaming agent (4%), adding 14% of deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, reducing the rotating speed to 200r/min, adding 6% of titanium dioxide nanotube, 8% of heavy calcium powder and 2% of kaolin, fully stirring, adding 20% of hollow filler and 15% of acrylic resin, adding a mixture of 12% of silicon carbide powder and 5% of magnesium fluoride after uniform mixing, and stirring at 600r/min for 40 minutes; adding silicone resin, and stirring at 500r/min for 30 minutes to obtain the final product.
Example 5
A functional heat-insulating environment-friendly coating material comprises the following components in percentage by mass:
mixing a proper amount of dispersing agent, toughening agent and defoaming agent (5%), adding 15% of deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, reducing the rotating speed to 200r/min, adding 10% of titanium dioxide nanotube, 10% of heavy calcium powder and 4% of kaolin, fully stirring, adding 14% of hollow filler and 23% of acrylic resin, adding 8% of silicon carbide powder, 3% of magnesium fluoride and the mixture after uniformly mixing, and stirring at 600r/min for 40 minutes; and finally, adding the silicon resin, and keeping stirring for 30min to finish the preparation.
Example 6 (preferred)
Is prepared from the following components in percentage by mass: after mixing a proper amount of dispersing agent, toughening agent and defoaming agent (5%), adding 16% of deionized water, stirring at a constant temperature of 25 ℃ at 1400r/min until the mixture is uniformly dispersed, reducing the rotating speed to 200r/min, adding 13% of titanium dioxide nanotube, 8% of heavy calcium powder and 4% of kaolin, fully stirring, adding 14% of hollow filler and 20% of acrylic resin, after uniformly mixing, supplementing a mixture of 8% of silicon carbide powder and 3% of magnesium fluoride, and stirring at 600r/min for 40 minutes; adding silicone resin, stirring at 500r/min for 30min, adding appropriate amount of thickener (1%), and stirring for 30min to obtain the final product.
TABLE 1
The coating materials prepared in the embodiments 1 to 6 are coated to a coating thickness of 380um, and performance detection is performed after drying, and the detection results are shown in table 2.
TABLE 2
The test standards of the solar light reflectivity and the hemispherical emissivity are as follows: JG/T235-2014
The coatings prepared in the embodiments 1-6 of the invention have far infrared ray emission capability, and the average emissivity in the wavelength range of 6-14 μm of radiation reaches 0.9.
The functional heat-insulating environment-friendly coating material prepared by the invention has the solar reflectance (88-92%) and the heat conductivity coefficient (0.031-0.037 Wm)～1K～1) The hemispherical emissivity (86-88%) and the average emissivity of the radiation wavelength range of 6-14 um reach 0.9, and all parameters exceed the national standard.
The approximate proportions of the functional fillers such as the dispersing agent, the toughening agent, the defoaming agent and the thickening agent are optimized through orthogonal experiments as above, and the details are not repeated again.
Comparative example 1
Comparative example 1 is different from example 1 in that: replacement of titanium dioxide nanotubes with TiO2Powder (rutile type), other operations were the same as in example 1.
Comparative example 2
Comparative example 2 differs from example 1 in that: the titanium dioxide nanotubes were replaced with titanium dioxide-coated mica, and the other operations were the same as in example 1.
Comparative example 3
Comparative example 3 differs from example 1 in that: the titanium dioxide nanotubes were replaced with alumina, and the other operations were the same as in example 1.
Comparative example 4
Comparative example 4 is different from example 1 in that: the same procedure as in example 1 was repeated except that silicon carbide powder was not contained and magnesium fluoride was used instead of silicon carbide.
Comparative example 5
Comparative example 5 differs from example 1 in that: the same procedure as in example 1 was repeated except that silicon carbide powder was not contained and titanium dioxide was used instead of silicon carbide.
Comparative examples 6 to 7
Compared with the embodiment 1, the comparative examples 6 to 7 are different in that: the procedure of example 1 was otherwise the same as that of example 1 except that magnesium fluoride was not contained and magnesium fluoride was replaced with silicon carbide and titanium dioxide.
Coating the coating material prepared in the comparative examples 1-7 to the coating thickness of 380um, drying, and performing performance detection, wherein the detection results are shown in Table 3.
Table 3:
the raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in all kinds of fields suitable for this invention, and further modifications can be readily made by those skilled in the art, so that the invention is not limited to the specific details and embodiments shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (3)
1. A functional heat-insulating environment-friendly coating material is characterized in that: the raw materials are calculated according to the mass percentage,
15-45% of acrylic resin, 4-18% of titanium dioxide nanotubes, 5-22% of heavy calcium powder, 2-8% of kaolin, 10-20% of hollow filler, 5-14% of silicon resin, 3-12% of silicon carbide powder, 1-5% of magnesium fluoride, 10-30% of water and the balance of auxiliary agents;
the specific surface area of the titanium dioxide nanotube is 340m2/g~420m2The length of the tube is 300-1000 nm, and the diameter of the tube is 20-50 nm;
the hollow filler is hollow nano ceramic, hollow silicon dioxide, hollow glass beads and hollow zirconia beads, and the mass ratio of the hollow filler to the hollow silica beads to the hollow zirconia beads is 55:12:13: 20;
the acrylic resin is water-based acrylic resin, and the solid content is 45-55%.
2. The functional thermal-insulating environment-friendly coating material according to claim 1, characterized in that: the auxiliary agent comprises one or more of a dispersing agent, a toughening agent, a thickening agent and a defoaming agent.
3. The method for preparing the functional heat-insulating environment-friendly coating material according to claim 1 or 2, characterized in that: the preparation steps are as follows:
(1) firstly, silicon carbide powder and magnesium fluoride are mixed through ball milling and are reserved after mixing;
(2) adding the auxiliary agent, the titanium dioxide nanotube, the heavy calcium carbonate powder and the kaolin into water, and stirring for 10-20 minutes;
(3) adding the hollow filler and the acrylic resin, and continuously stirring for 15-30 minutes;
(4) and supplementing the mixture of the silicon carbide powder and the magnesium fluoride after stirring, stirring for 40-60 minutes, finally adding the silicon resin, and stirring for 30-50 minutes to obtain the final product of the heat-insulating coating material.
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