Aerogel heat insulation coating capable of being coated at temperature and preparation method of aerogel heat insulation coating

Abstract

The invention provides an aerogel heat insulation coating capable of being coated at a temperature and a preparation method of the aerogel heat insulation coating. The thermal insulation coating comprises the following components in parts by weight: 5-10 parts of an organic solvent, 5-10 parts of deionized water, 0.1-1 part of a defoaming agent, 0.1-1 part of a rheological additive, 10-15 parts of a high-hardness styrene-acrylic copolymer emulsion, 15-20 parts of a flexible acrylic polymer emulsion, 10-15 parts of a water-based organic silicon emulsion, 20-30 parts of aerogel slurry and 10-30 parts of functional filler. A special siloxane structure in the water-based organic silicon emulsion enables the water-based organic silicon emulsion to have thermal stability, thermal oxidation stability and heat and humidity resistance; the high-molecular-weight flexible acrylic polymer emulsion can endow the coating with flexibility; in the curing process of the high-hardness styrene-acrylic copolymer emulsion, a hard monomer migrates to a base material to form a compact coating, a soft monomer fills the interior, the adhesive force is remarkably improved, and the three emulsions cooperate with one another to be cured into a film, so that the coating has good heat resistance, high adhesive force and good flexibility; the requirements that the coating is coated at the temperature of 80-120 DEG C and can resist the high temperature of 200 DEG C for a long time are met.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation coatings, and in particular to an aerogel thermal insulation coating capable of being applied at a temperature and a preparation method thereof. Background Art

[0002] With the rapid development of society and the advancement of science and technology, demand for functional thermal insulation materials is increasing across all industries. The thermal insulation materials market is experiencing rapid growth, with a compound annual growth rate of 12%. If related equipment and facilities are improperly insulated, significant heat loss can occur. For example, thermal transmission pipelines in thermal systems operate in a corrosive environment of high temperatures ranging from 80°C to 180°C for extended periods of time, consuming significant amounts of energy annually due to heat dissipation. To minimize heat loss and conserve energy, thermal insulation measures are essential.

[0003] Traditional thermal insulation materials, such as rock wool, are prone to water absorption, increasing their thermal conductivity and significantly reducing their insulation effectiveness. They also suffer from poor workability, corrosion beneath the insulation layer, and rusting of the protective layer. Furthermore, due to water absorption and corrosion, these materials are no longer usable, and discarded, they generate solid waste and cause significant environmental pollution. Aerogel water-based thermal insulation coatings offer stable thermal conductivity and are easy to apply. Compared to solvent-based insulation coatings, they are non-toxic and contain no harmful ingredients, making them more environmentally friendly. In recent years, they have been widely used in the petroleum and petrochemical industries.

[0004] To minimize downtime and energy consumption, thermal transmission pipelines require continuous painting during the coating process, requiring warm-air painting. To maintain proper operation, the pipeline temperature must be maintained above 80°C. Existing water-based paints are prone to foaming during warm-air painting. This results in noticeable unevenness on the paint film during application, directly impacting the aesthetics of the coated part and the durability of subsequent device protection.

[0005] CN118344791A proposes a compressor warm-brush coating, its preparation, and application. The warm-brush coating comprises the following components by weight: 30-40 parts water-based resin, 1-10 parts amino resin, 1-10 parts black slurry, 40-55 parts organic solvent, 1-10 parts water, and 1-9 parts additive. The coating has advantages such as no blistering or marking, excellent adhesion, and ease of preparation. While it can be warm-brush applied, it cannot withstand prolonged high temperatures. Summary of the Invention

[0006] In view of this, the present invention aims to propose an aerogel thermal insulation coating that can be applied at temperature and a preparation method thereof, so as to solve the problem that the coating in the prior art cannot be applied at a temperature of 80 to 120°C on the substrate surface and cannot withstand high temperature for a long time.

[0007] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0008] On the one hand, the present invention proposes an aerogel thermal insulation coating that can be applied at room temperature, comprising the following components in parts by weight: 5 to 10 parts of an organic solvent, 5 to 10 parts of deionized water, 0.1 to 1 part of a defoaming agent, 0.1 to 1 part of a rheological additive, 10 to 15 parts of a high-hardness styrene-acrylate copolymer emulsion, 15 to 20 parts of a flexible acrylic polymer emulsion, 10 to 15 parts of an aqueous silicone emulsion, 20 to 30 parts of an aerogel slurry, and 10 to 30 parts of a functional filler.

[0009] Furthermore, the organic solvent is ethylene glycol.

[0010] Furthermore, the ratio of ethylene glycol to deionized water is 1:1.

[0011] Furthermore, the defoaming agent is selected from at least one of the organic silicon defoaming agent TEGO Foamex 810 and the polyether siloxane copolymer defoaming agent TEGO Airex 901W.

[0012] Furthermore, the rheological additive is selected from at least one of organically modified montmorillonite clay rheological additive DE, polyether polyurethane rheological additive DVK-299, and water-based acrylic acid associative alkali swelling thickener SV-125.

[0013] Furthermore, the functional filler includes 5 to 15 parts of vacuum ceramic microspheres and 5 to 15 parts of hollow glass microspheres.

[0014] Furthermore, the vacuum ceramic microspheres are made of soda lime borosilicate glass, and D50=3 μm.

[0015] Furthermore, the hollow glass microspheres are made of soda-lime borosilicate glass, and D50=55 μm.

[0016] Furthermore, the high-hardness styrene-acrylic copolymer emulsion is high-hardness styrene-acrylic copolymer emulsion 7199, the flexible acrylic polymer emulsion is flexible acrylic polymer emulsion 1002, and the water-based silicone emulsion is water-based silicone emulsion SH-9608.

[0017] The special siloxane structure in the water-based silicone emulsion gives it excellent thermal stability, thermal oxidation stability, and moisture and heat resistance; the high molecular weight flexible acrylic polymer emulsion can give the coating better flexibility; the high hardness styrene acrylic copolymer emulsion contains more hard monomer structures. During the curing process, the hard monomers migrate to the substrate to form a dense coating, and the soft monomers fill the interior, significantly improving the adhesion of the coating. These three emulsions work together to cure into a film, giving the coating good heat resistance, high adhesion and good flexibility.

[0018] Ethylene glycol with a higher boiling point is selected and mixed with water. The use of ethylene glycol significantly slows down the volatilization rate of the solvent and avoids the boiling of the solvent. The coating surface is intact and free of bubbles during warm coating, meeting the requirement that the coating can be coated on the substrate surface at 80-120°C.

[0019] The aerogel slurry in the component is a lightweight and porous nanomaterial with high specific surface area, low density and extremely low thermal conductivity. It can be used as a thermal insulation filler and exhibits excellent thermal insulation performance when used in thermal insulation coatings.

[0020] The added large-particle hollow glass microspheres and small-particle vacuum ceramic microspheres are used as functional fillers. Due to their different particle sizes, they can work together to tightly fill and form a uniform and dense coating, avoiding the shortcomings of aerogel coatings such as poor mechanical properties and easy cracking. When the thickness of a single coat of coating can reach 5mm dry film, the coating remains intact and does not crack. The dried coating has good mechanical properties and chemical resistance.

[0021] On the other hand, the present invention also provides a method for preparing the above-mentioned aerogel thermal insulation coating that can be applied at a temperature, the preparation method comprising the following steps:

[0022] Accurately weigh each component, add organic solvent, deionized water and defoaming agent in sequence, adjust the speed to 300-600 r / min, and disperse for 5-10 minutes to obtain a mixed clear solution;

[0023] Add rheological additives to the mixed clear solution, adjust the speed to 500-1000 r / min, and disperse for 10-15 minutes;

[0024] Add high-hardness styrene-acrylic copolymer emulsion, flexible acrylic polymer emulsion, and water-based silicone emulsion, adjust the speed to 500-800 r / min, and disperse for 5-10 minutes. Add aerogel slurry while stirring, adjust the speed to 600-800 r / min, and disperse for 5-10 minutes.

[0025] Add vacuum ceramic microbeads and hollow glass microbeads in sequence under stirring, adjust the rotation speed to 600-800 r / min, disperse for 10-20 minutes, disperse the functional filler evenly, filter, and package.

[0026] Compared with the prior art, the aerogel thermal insulation coating capable of being applied at a temperature and the preparation method thereof described in the present invention have the following advantages:

[0027] (1) The three emulsions, namely, water-based silicone emulsion, high molecular weight flexible acrylic polymer emulsion, and high hardness styrene acrylic copolymer emulsion, work together to form a film, giving the coating good heat resistance, high adhesion, and good flexibility.

[0028] (2) Ethylene glycol with a higher boiling point is selected and mixed with water. The use of ethylene glycol significantly slows down the volatilization rate of the solvent and avoids the boiling of the solvent. When the coating is applied at a temperature of 80 to 120°C, the surface of the coating is intact and free of bubbles, meeting the requirement that the coating can be applied at a temperature of 80 to 120°C on the substrate surface.

[0029] (3) Aerogel slurry is a lightweight and porous nanomaterial with high specific surface area, low density and extremely low thermal conductivity. It can be used as a thermal insulation filler and exhibit excellent thermal insulation performance when used in thermal insulation coatings.

[0030] (4) The functional fillers have different particle sizes and can work together to fill tightly to form a uniform and dense coating, avoiding the shortcomings of aerogel coatings such as poor mechanical properties and easy cracking. When the thickness of a single coating layer can reach 5mm dry film, the coating remains intact and does not crack. The dried coating has good mechanical properties and chemical resistance.

[0031] (5) The aerogel thermal insulation coating of the present invention, which can be applied at a temperature of 80 to 120°C, has excellent thermal insulation performance, good chemical resistance, high adhesion, and good flexibility. The coating can be applied to various storage tanks, buildings, pipelines, and other equipment and facilities for thermal insulation. It can meet the requirements of thermal coating at a temperature of 80 to 120°C and can withstand high temperatures of 200°C for a long time, helping enterprises reduce production costs and equipment energy consumption. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with specific embodiments. It should be noted that the data in the following experimental examples are obtained by the inventor through a large number of experiments. Due to space limitations, only a portion thereof is shown in the specification, and those skilled in the art can understand and implement the present invention under these data. These embodiments are merely intended to illustrate the present invention and are not intended to limit the scope of the present invention. It should also be understood that, after having read the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these changes or modifications also fall within the scope protected by this application.

[0033] The invention discloses an aerogel thermal insulation coating that can be applied at room temperature. The coating comprises the following components in parts by weight: 5 to 10 parts of an organic solvent, 5 to 10 parts of deionized water, 0.1 to 1 part of a defoamer, 0.1 to 1 part of a rheological additive, 10 to 15 parts of a high-hardness styrene-acrylic copolymer emulsion, 15 to 20 parts of a flexible acrylic polymer emulsion, 10 to 15 parts of an aqueous organic silicone emulsion, 20 to 30 parts of an aerogel slurry, 5 to 15 parts of vacuum ceramic microbeads, and 5 to 15 parts of hollow glass microbeads.

[0034] The heat-insulating coating of the present invention has the advantages of excellent heat-insulating performance, good mechanical properties and chemical resistance through the interaction between various components.

[0035] The aerogel slurry used in the examples and comparative examples of the present invention is nano aerogel slurry provided by Shenzhen Zhongning Company.

[0036] Example 1

[0037] The components of Example 1 are: 5.2 parts of deionized water, 5.2 parts of ethylene glycol, 0.5 parts of silicone defoamer TEGOFoamex 810, 0.2 parts of organically modified montmorillonite clay rheological additive DE, 12.6 parts of styrene-acrylate copolymer emulsion 7199, 16.8 parts of flexible acrylic polymer emulsion 1002, 12.6 parts of water-based silicone emulsion SH-9608, 26 parts of aerogel slurry, 10.4 parts of soda-lime borosilicate glass with D50=3 μm, and 10.4 parts of soda-lime borosilicate glass with D50=55 μm.

[0038] Accurately weigh the components according to the above formula, add ethylene glycol, deionized water and silicone defoamer TEGO Foamex 810 to the pull cylinder in sequence, adjust the speed to 500 r / min, and disperse for 8 minutes to obtain a mixed clear liquid; add the organic modified montmorillonite clay rheological additive DE to the mixed clear liquid, adjust the speed to 800 r / min, and disperse for 12 minutes; then add styrene acrylic copolymer emulsion 7199, flexible acrylic polymer emulsion 1002, and water-based silicone emulsion SH-9608, adjust the speed to 600 r / min, and disperse for 8 minutes; add the aerogel slurry while stirring, adjust the speed to 700 r / min, and disperse for 8 minutes; then add soda lime borosilicate glass and soda lime borosilicate glass in sequence while stirring, adjust the speed to 700 r / min, and disperse for 15 minutes to evenly disperse the functional filler; filter and package to obtain the thermal insulation coating.

[0039] Example 2

[0040] The components of Example 2 are: 5 parts of deionized water, 5 parts of ethylene glycol, 0.1 parts of polyether siloxane copolymer defoamer TEGOAirex 901W, 0.1 parts of polyether polyurethane rheological additive DVK-299, 10 parts of styrene acrylic copolymer emulsion 7199, 15 parts of flexible acrylic polymer emulsion 1002, 10 parts of water-based silicone emulsion SH-9608, 20 parts of aerogel slurry, 5 parts of soda lime borosilicate glass with D50 = 3 μm, and 15 parts of soda lime borosilicate glass with D50 = 55 μm.

[0041] Accurately weigh the components according to the above formula, add ethylene glycol, deionized water and polyether siloxane copolymer defoamer TEGO Airex 901W to the pull cylinder in sequence, adjust the speed to 300 r / min, and disperse for 5 minutes to obtain a mixed clear liquid; add polyether polyurethane rheological additive DVK-299 to the mixed clear liquid, adjust the speed to 500 r / min, and disperse for 10 minutes; then add styrene acrylic copolymer emulsion 7199, flexible acrylic polymer emulsion 1002, and water-based silicone emulsion SH-9608, adjust the speed to 800 r / min, and disperse for 10 minutes; add aerogel slurry while stirring, adjust the speed to 600 r / min, and disperse for 5 minutes; then add soda lime borosilicate glass and soda lime borosilicate glass in sequence while stirring, adjust the speed to 600 r / min, and disperse for 10 minutes to evenly disperse the functional filler; filter and package to obtain the thermal insulation coating.

[0042] Example 3

[0043] The components of Example 3 are: 10 parts of deionized water, 10 parts of ethylene glycol, 1 part of polyether siloxane copolymer defoamer TEGOAirex 901W, 1 part of aqueous acrylic associative alkali swelling thickener SV-125, 15 parts of styrene-acrylic copolymer emulsion 7199, 20 parts of flexible acrylic polymer emulsion 1002, 15 parts of aqueous silicone emulsion SH-9608, 30 parts of aerogel slurry, 15 parts of soda-lime borosilicate glass with D50=3 μm, and 5 parts of soda-lime borosilicate glass with D50=55 μm.

[0044] Accurately weigh the components according to the above formula, add ethylene glycol, deionized water and polyether siloxane copolymer defoamer TEGOAirex 901W to the pull cylinder in sequence, adjust the speed to 600 r / min, and disperse for 10 minutes to obtain a mixed clear liquid; add water-based acrylic associative alkali-swellable thickener SV-125 to the mixed clear liquid, adjust the speed to 1000 r / min, and disperse for 15 minutes; then add styrene-acrylic copolymer emulsion 7199, flexible acrylic polymer emulsion 1002, and water-based silicone emulsion SH-9608, adjust the speed to 500 r / min, and disperse for 5 minutes; add aerogel slurry while stirring, adjust the speed to 800 r / min, and disperse for 10 minutes; then add soda-lime borosilicate glass and soda-lime borosilicate glass in sequence while stirring, adjust the speed to 800 r / min, and disperse for 20 minutes to evenly disperse the functional filler; filter and package to obtain the thermal insulation coating.

[0045] Comparative Example 1

[0046] The formula composition, dosage and preparation method of Comparative Example 1 are the same as those of Example 1, except that the dosage of soda-lime borosilicate glass is 20.8 parts and no soda-lime borosilicate glass is added.

[0047] Comparative Example 2

[0048] The formula composition, dosage and preparation method of Comparative Example 1 are the same as those of Example 1, except that the dosage of soda lime borosilicate glass is 16.6 parts and the dosage of soda lime borosilicate glass is 5.2 parts.

[0049] Comparative Example 3

[0050] The formula composition, dosage and preparation method of Comparative Example 3 are the same as those of Example 1, except that no acrylic copolymer emulsion is added, the dosage of styrene acrylic copolymer emulsion 7199 is 21 parts, and the dosage of water-based silicone emulsion SH-9608 is 21 parts.

[0051] Comparative Example 4

[0052] The formula composition, dosage and preparation method of Comparative Example 4 are the same as those of Example 1, except that the styrene-acrylic copolymer emulsion is not added, the dosage of acrylic copolymer emulsion 1002 is 29.4 parts, and the dosage of water-based silicone emulsion SH-9608 is 12.6 parts.

[0053] Comparative Example 5

[0054] The formula composition, dosage and preparation method of Comparative Example 5 are the same as those of Example 1, except that no water-based silicone emulsion is added, the dosage of styrene-acrylic copolymer emulsion 7199 is 12.6 parts, and the dosage of acrylic copolymer emulsion 1002 is 29.4 parts.

[0055] Comparative Example 6

[0056] The formula composition, dosage and preparation method of Comparative Example 6 are the same as those of Example 1, except that the dosage of ethylene glycol is 1.04 parts, the dosage of deionized water is 9.36 parts, and the dosage ratio of ethylene glycol to deionized water is 1:9.

[0057] Comparative Example 7

[0058] The formula composition, dosage and preparation method of Comparative Example 7 are the same as those of Example 1, except that the dosage of ethylene glycol is 3.12 parts, the dosage of deionized water is 7.28 parts, and the dosage ratio of ethylene glycol to deionized water is 3:7.

[0059] Comparative Example 8

[0060] The formula composition, dosage and preparation method of Comparative Example 8 are the same as those of Example 1, except that the dosage of diethylene glycol butyl ether is 5.2 parts, the dosage of deionized water is 5.2 parts, and the dosage ratio of diethylene glycol butyl ether to deionized water is 1:1.

[0061] Comparative Example 9

[0062] The formula composition, dosage and preparation method of Comparative Example 9 are the same as those of Example 1, except that ethylene glycol is not added and the dosage of deionized water is 10.4 parts.

[0063] Comparative Example 10

[0064] The formula composition, dosage and preparation method of Comparative Example 10 are the same as those of Example 1, except that the dosage of ethylene glycol is 7.28 parts, the dosage of deionized water is 3.12 parts, and the dosage ratio of ethylene glycol to deionized water is 7:3.

[0065] Comparative Example 11

[0066] The formula composition, dosage and preparation method of Comparative Example 11 are the same as those of Example 1, except that deionized water is not added and the dosage of ethylene glycol is 10.4 parts.

[0067] Test panels were prepared according to the requirements of HG / T 5182-2017. The coatings prepared in Examples 1-3 and Comparative Examples 1-11 were brush-coated on treated tinplate and sandblasted steel plates, respectively. After surface drying, they were cured at room temperature for one week, achieving a dry film thickness of 1 mm. The performance data for the thermal insulation coatings of Examples 1-3 are shown in Table 1. The performance data for the coatings formulated with different emulsions and functional fillers in Comparative Examples 1-5 are shown in Table 2. The performance data for the coatings formulated with different solvents in Comparative Examples 6-11 are shown in Table 3.

[0068] Table 1

[0069]

[0070]

[0071] Table 2

[0072]

[0073]

[0074] Table 3

[0075]

[0076]

[0077] Comparing Tables 1 and 2, it can be seen that in Comparative Example 1, only hollow glass microspheres were used as the functional filler, which failed to interact with the vacuum ceramic microspheres to increase the density of the coating. As a result, the acid, alkali, and salt spray resistance were inferior to those of Examples 1-3, and the adhesion performance was also reduced. Although both hollow glass microspheres and vacuum ceramic microspheres were added in Comparative Example 2, the excessive amount of vacuum ceramic microspheres may have caused uneven coating of the functional filler by the emulsion, which was detrimental to the coating's acid and alkali resistance.

[0078] The film-forming materials of Comparative Examples 3 to 5 were each made with only two of the high-hardness styrene-acrylic copolymer emulsion, the flexible acrylic polymer emulsion, and the water-based organosilicon emulsion. The synergistic effect of the three emulsions could not be exerted during the curing process. The impact resistance of the coating of Comparative Example 3 decreased, the adhesion of the coating of Comparative Example 4 decreased, and the heat resistance of the coating of Comparative Example 5 was poor. When applied at 120°C, the coating was uneven and had bubbles. The acid resistance, alkali resistance, and salt spray resistance were also affected. The film-forming materials of Examples 1 to 3 were three types. The dried coatings had good heat resistance, high adhesion, and good flexibility.

[0079] Table 3 further examines the effects of different solvents on coating performance. Ethylene glycol has a relatively high boiling point of 197.4°C. Adding an appropriate amount of ethylene glycol can significantly reduce the solvent volatilization rate, avoiding the generation of a large number of bubbles on the paint film surface due to solvent boiling and excessive volatilization during the warm coating process. Too little ethylene glycol is difficult to play its role, such as in Comparative Examples 6 and 7. However, when too much ethylene glycol is added (such as Comparative Examples 10 and 11) or when diethylene glycol butyl ether, a solvent with a higher boiling point, is added (such as Comparative Example 8), the boiling point of diethylene glycol butyl ether is 230°C. Although the coating surface is intact during the 120°C warm coating process, the high boiling point of the solvent makes it difficult to volatilize, the coating drying rate is slow, and the time required for surface drying and actual drying is long, which is not conducive to construction. Adding ethylene glycol in Examples 1 to 3 can effectively suppress bubbles on the coating surface, and when the mass ratio of ethylene glycol to water is 1:1, the coating surface is intact and there is no blistering during the 120°C warm coating process.

[0080] The present invention's heat-applicable aerogel thermal insulation coating offers excellent thermal insulation, good chemical resistance, strong adhesion, and good flexibility. The coating is suitable for thermal insulation of various storage tanks, buildings, pipelines, and other equipment and facilities. It can be applied at temperatures between 80 and 120°C and can withstand long-term temperatures up to 200°C, helping companies reduce production costs and energy consumption.

[0081] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A thermal insulation coating that can be applied at room temperature, characterized in that: The invention comprises the following components in parts by weight: 5-10 parts of organic solvent, 5-10 parts of deionized water, 0.1-1 part of defoaming agent, 0.1-1 part of rheological additive, 10-15 parts of high hardness styrene-acrylate copolymer emulsion, 15-20 parts of flexible acrylic polymer emulsion, 10-15 parts of water-based organic silicone emulsion, 20-30 parts of aerogel slurry and 10-30 parts of functional filler.

2. The aerogel thermal insulation coating that can be applied at a temperature according to claim 1 is characterized in that: The organic solvent is ethylene glycol.

3. The aerogel thermal insulation coating that can be applied at a temperature according to claim 2 is characterized in that: The ratio of the ethylene glycol to the deionized water is 1:

1.

4. The aerogel thermal insulation coating that can be applied at a temperature according to claim 1 is characterized in that: The defoaming agent is selected from at least one of the organic silicon defoaming agent TEGO Foamex 810 and the polyether siloxane copolymer defoaming agent TEGO Airex 901W.

5. The aerogel thermal insulation coating capable of being applied at a temperature according to claim 1 is characterized in that: The rheological additive is selected from at least one of organic modified montmorillonite clay rheological additive DE, polyether polyurethane rheological additive DVK-299, and water-based acrylic acid associative alkali swelling thickener SV-125.

6. The aerogel thermal insulation coating capable of being applied at a temperature according to claim 1 is characterized in that: The functional filler comprises 5 to 15 parts of vacuum ceramic microspheres and 5 to 15 parts of hollow glass microspheres.

7. The aerogel thermal insulation coating capable of being applied at a temperature according to claim 6 is characterized in that: The vacuum ceramic microspheres are made of soda lime borosilicate glass, and D50=3 μm.

8. The aerogel thermal insulation coating capable of being applied at a temperature according to claim 6 is characterized in that: The hollow glass microspheres are made of soda-lime borosilicate glass, and D50=55 μm.

9. The aerogel thermal insulation coating capable of being applied at a temperature according to claim 1, characterized in that: The high-hardness styrene-acrylic copolymer emulsion is high-hardness styrene-acrylic copolymer emulsion 7199, the flexible acrylic polymer emulsion is flexible acrylic polymer emulsion 1002, and the water-based silicone emulsion is water-based silicone emulsion SH-9608.

10. A method for preparing the aerogel thermal insulation coating capable of being applied at a temperature as claimed in any one of claims 1 to 9, characterized in that: The steps include: Accurately weigh each component, add organic solvent, deionized water and defoaming agent in sequence, adjust the speed to 300-600 r / min, and disperse for 5-10 minutes to obtain a mixed clear solution; Add rheological additives to the mixed clear solution, adjust the speed to 500-1000 r / min, and disperse for 10-15 minutes; Add high-hardness styrene-acrylic copolymer emulsion, flexible acrylic polymer emulsion, and water-based silicone emulsion, adjust the speed to 500-800 r / min, and disperse for 5-10 minutes. Add aerogel slurry while stirring, adjust the speed to 600-800 r / min, and disperse for 5-10 minutes. Add vacuum ceramic microbeads and hollow glass microbeads in sequence under stirring, adjust the rotation speed to 600-800 r / min, disperse for 10-20 minutes, disperse the functional filler evenly, filter, and package.

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