Weather-resistant external wall thermal insulation coating and preparation method thereof

Abstract

The invention belongs to the technical field of coating preparation, and particularly relates to a weather-resistant external wall thermal insulation coating and a preparation method thereof. The coral powder, the expanded vermiculite and the nano clay are added, so that the heat conductivity coefficient of the coating is increased, and the heat preservation effect of the coating is further enhanced; by reasonably compounding the polyvinyl butyral emulsion, the amino silicon oil, the cyclohexanone, the starch ether, the microcrystalline cellulose, the sodium silicate and the phosphonate, not only are the water retention and crack resistance of the coating improved, but also the capabilities of the coating for resisting ultraviolet rays, temperature change, humidity and chemical substance erosion are enhanced, namely the weather resistance of the coating is enhanced. Therefore, according to the technical scheme, a scientific formula is provided for the weather-resistant thermal insulation coating, the application market of the weather-resistant thermal insulation coating is widened, and the practicability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of coating preparation, and in particular relates to a weather-resistant exterior wall thermal insulation coating and a preparation method thereof. Background Art

[0002] Coatings play a very important role in construction, industry and daily life. Their main functions include: (1) protecting the substrate from corrosion, water and pollution; (2) beautifying the appearance; (3) providing multiple functions such as thermal insulation, fire prevention and antibacterial. Therefore, the application market prospects of coatings are very broad.

[0003] Although there are reports on thermal insulation coatings in the prior art, they generally tend to develop thermal insulation performance, and thus often ignore the weather resistance of the coating, which leads to the coating's weak ability to resist ultraviolet rays, temperature changes, humidity and chemical corrosion, thus limiting the rapid application of exterior wall thermal insulation coatings. It can be seen that how to develop an exterior wall thermal insulation coating with strong weather resistance is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a weather-resistant exterior wall thermal insulation coating and a preparation method thereof. The coating not only has good thermal insulation effect but also has excellent weather resistance.

[0005] The present invention provides a weather-resistant exterior wall thermal insulation coating, which comprises the following raw materials in parts by weight:

[0006] 20-28 parts of coral powder, 30-35 parts of expanded vermiculite, 13-18 parts of polyvinyl butyral emulsion, 0.3-0.8 parts of amino silicone oil, 6-8 parts of cyclohexanone, 1-1.5 parts of starch ether, 0.5-0.8 parts of microcrystalline cellulose, 2-3 parts of sodium silicate, 4-5 parts of phosphonate, 8-12 parts of nano clay, 9-11 parts of defoaming agent and 200-300 parts of water.

[0007] Preferably, the following raw materials are included by weight:

[0008] 25 parts of coral powder, 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nano clay, 10 parts of defoamer and 280 parts of water;

[0009] Preferably, the following raw materials are included by weight:

[0010] 28 parts of coral powder, 35 parts of expanded vermiculite, 13 parts of polyvinyl butyral emulsion, 0.8 parts of amino silicone oil, 7 parts of cyclohexanone, 2 parts of starch ether, 0.6 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 12 parts of nano clay, 10 parts of defoaming agent and 300 parts of water.

[0011] Preferably, the fineness of the coral powder and expanded vermiculite is 800-1000 mesh respectively.

[0012] Preferably, the coral powder includes: red coral powder and / or white coral powder.

[0013] Preferably, when the coral powder includes red coral powder and white coral powder, the mass ratio of the red coral powder to the white coral powder is 1:1-2.

[0014] The present invention provides a method for preparing the weather-resistant exterior wall thermal insulation coating described in the above technical solution, comprising the following steps:

[0015] Coral powder, expanded vermiculite, polyvinyl butyral emulsion, amino silicone oil, cyclohexanone, starch ether, microcrystalline cellulose, sodium silicate, phosphonate, nano clay and defoamer are sequentially added into water to obtain a mixture; the mixture is sequentially heated and cooled to obtain a weather-resistant exterior wall thermal insulation coating.

[0016] Preferably, the heating temperature is 50-55°C and the heating time is 40-60 minutes.

[0017] Preferably, the heating process is accompanied by stirring; the stirring speed is 800-1200 rpm.

[0018] Preferably, the cooling temperature is 20-30°C.

[0019] Beneficial effects:

[0020] The invention provides a weather-resistant exterior wall thermal insulation coating, which comprises the following raw materials in parts by weight: 20-28 parts of coral powder, 30-35 parts of expanded vermiculite, 13-18 parts of polyvinyl butyral emulsion, 0.3-0.8 parts of amino silicone oil, 6-8 parts of cyclohexanone, 1-1.5 parts of starch ether, 0.5-0.8 parts of microcrystalline cellulose, 2-3 parts of sodium silicate, 4-5 parts of phosphonate, 8-12 parts of nano clay, 9-11 parts of defoaming agent and 200-300 parts of water. By reasonably mixing coral powder, expanded vermiculite and nano-clay, the thermal conductivity and thermal insulation effect of the coating are improved; by reasonably compounding polyvinyl butyral emulsion, amino silicone oil, cyclohexanone, starch ether, microcrystalline cellulose, sodium silicate and phosphonate, not only the thermal insulation performance of the coating is guaranteed, but also the water retention and crack resistance of the coating are improved, which is beneficial for the coating to resist the erosion of ultraviolet rays, temperature changes, humidity and chemicals, and enhances the weather resistance of the coating.

[0021] Based on the above technical advantages, the present invention also provides a method for preparing a weather-resistant exterior wall thermal insulation coating, which is simple and quick. Therefore, the technical solution provided by the present invention not only provides a scientific formula for the weather-resistant thermal insulation coating, but also helps to broaden the application market of the weather-resistant thermal insulation coating, and has strong practicality. DETAILED DESCRIPTION

[0022] In the present invention, unless otherwise specified, the reagents and equipment used are conventional reagents and equipment.

[0023] In order to further illustrate the present invention, the technical solutions provided by the present invention are described in detail below in conjunction with embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0024] Example 1

[0025] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0026] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0027] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0028] Example 2

[0029] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0030] (1) preparing raw materials: 28 parts of coral powder (red coral powder), 35 parts of expanded vermiculite, 13 parts of polyvinyl butyral emulsion, 0.8 parts of amino silicone oil, 7 parts of cyclohexanone, 2 parts of starch ether, 0.6 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 12 parts of nano clay, 10 parts of defoaming agent and 300 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0031] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0032] Example 3

[0033] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0034] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0035] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 55° C. for 50 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0036] Comparative Example 1

[0037] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0038] (1) preparing raw materials: 10 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0039] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0040] Comparative Example 2

[0041] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0042] (1) Prepare raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded perlite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded perlite is 800 mesh respectively;

[0043] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0044] Comparative Example 3

[0045] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0046] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 1.5 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nano clay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0047] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0048] Comparative Example 4

[0049] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0050] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nano clay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 600 mesh respectively;

[0051] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0052] Comparative Example 5

[0053] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0054] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of acrylic emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0055] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0056] Comparative Example 6

[0057] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0058] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 20 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0059] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0060] Comparative Example 7

[0061] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0062] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:5), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0063] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 40° C. for 60 minutes with stirring during the heating process; cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0064] Comparative Example 8

[0065] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0066] (1) preparing raw materials: 25 parts of coral powder (red coral powder and white coral powder are mixed in a mass ratio of 1:1), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nanoclay, 10 parts of defoaming agent and 150 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0067] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0068] Comparative Example 9

[0069] A method for preparing a weather-resistant exterior wall thermal insulation coating, comprising the following steps:

[0070] (1) preparing raw materials: 25 parts of coral powder (black coral powder), 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nano clay, 10 parts of defoaming agent and 280 parts of water; wherein the fineness of the coral powder and the expanded vermiculite is 800 mesh respectively;

[0071] (2) Preparing a coating: adding the raw materials in step (1) to water in sequence to obtain a mixture; heating the mixture to 50° C. for 60 min, stirring the mixture during the heating process (stirring speed is 1000 rpm), and cooling the mixture to 25° C. after heating to obtain a weather-resistant exterior wall thermal insulation coating.

[0072] Application Example 1 Thermal Conductivity Detection

[0073] The thermal conductivity of the weather-resistant exterior wall thermal insulation coatings prepared in Examples 1-3 of the present invention and Comparative Examples 1-8 was tested respectively. The above-mentioned weather-resistant exterior wall thermal insulation coatings were placed in the sample slot of the thermal conductivity tester to fill it up. The filling thickness of each weather-resistant exterior wall thermal insulation coating was 2 mm. The results are shown in Table 1.

[0074] Table 1 Thermal conductivity of different treatments

[0075] deal with Thermal conductivity (W / mK) Example 1 0.38 Example 2 0.35 Example 3 0.40 Comparative Example 1 0.57 Comparative Example 2 0.54 Comparative Example 3 0.61 Comparative Example 4 0.68 Comparative Example 5 0.48 Comparative Example 6 0.42 Comparative Example 7 0.58 Comparative Example 8 0.66 Comparative Example 9 0.59

[0076] From the data in Table 1, it can be seen that after the weather-resistant thermal insulation coating is prepared by the technical solution provided by the present invention, its thermal conductivity is good, and the thermal conductivity coefficient is 0.35-0.40W / mK; however, after adjusting the amount of a certain component, replacing a certain component or adjusting the preparation parameters, the thermal conductivity coefficient of the weather-resistant thermal insulation coating will increase, which is not conducive to heat maintenance of the corresponding product and the thermal insulation effect is poor.

[0077] Application Example 2

[0078] Dumbbell I-type specimens were prepared using the weather-resistant exterior wall insulation coatings prepared in Examples 1-3 of the present invention and Comparative Examples 1-8, respectively. The treated coatings were placed in an environment with a temperature of 23±2°C and a humidity of 40%-60% on the 1st to 7th days, and the treated coatings were placed in an environment with a temperature of 35±2°C and a humidity of 40%-60% on the 8th to 15th days. The treated coatings were placed in an environment with a temperature of 23±2°C and a humidity of 20%-30% on the 16th to 23rd days, and the treated coatings were placed in an environment with a temperature of 35±2°C and a humidity of 20%-30% on the 24th to 30th days. The phenotypic changes of the treated coatings were then observed, and the results are shown in Table 2.

[0079] Table 2 Phenotypic changes in different treatments

[0080] deal with Description of phenotypic changes Example 1 No powdering, no yellowing Example 2 No powdering, no yellowing Example 3 No powdering, no yellowing Comparative Example 1 Slightly powdery, no yellowing Comparative Example 2 Slightly powdery, no yellowing Comparative Example 3 No powdering, slight yellowing Comparative Example 4 Slight powdering, yellowing Comparative Example 5 Slight powdering, slight yellowing Comparative Example 6 Slight powdering, slight yellowing Comparative Example 7 Powdering, slight yellowing Comparative Example 8 Slight powdering, slight yellowing Comparative Example 9 Slight powdering, yellowing

[0081] Combining the phenotypic changes of each coating in Table 2, it can be seen that the coating prepared by the technical solution of the present invention has no powdering and no yellowing after being placed in environments with different temperatures and humidities, and has good weather resistance; while the coating provided in the comparative example may powder or yellow. It can be seen that the present invention improves the weather resistance of the coating by refining the raw material formula and the addition amount in the coating.

[0082] In summary, the weather-resistant exterior wall thermal insulation coating provided by the present invention not only has good thermal conductivity, which is beneficial to the improvement of thermal insulation performance, but also can maintain the original appearance of the coating after being impacted by changes in the external environment, without powdering or yellowing, and has excellent weather resistance and better practical performance.

[0083] Although the above embodiment describes the present invention in detail, it is only a part of the embodiments of the present invention, not all of the embodiments. People can also obtain other embodiments based on this embodiment without creativity, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A weather-resistant exterior wall thermal insulation coating, characterized in that: By weight, it includes the following raw materials: 20-28 parts of coral powder, 30-35 parts of expanded vermiculite, 13-18 parts of polyvinyl butyral emulsion, 0.3-0.8 parts of amino silicone oil, 6-8 parts of cyclohexanone, 2-2.5 parts of starch ether, 0.5-0.8 parts of microcrystalline cellulose, 2-3 parts of sodium silicate, 4-5 parts of phosphonate, 8-12 parts of nano clay, 9-11 parts of defoaming agent and 200-300 parts of water.

2. The weather-resistant exterior wall thermal insulation coating according to claim 1, characterized in that: By weight, it includes the following raw materials: 25 parts of coral powder, 30 parts of expanded vermiculite, 15 parts of polyvinyl butyral emulsion, 0.5 parts of amino silicone oil, 8 parts of cyclohexanone, 2 parts of starch ether, 0.5 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 10 parts of nano clay, 10 parts of defoaming agent and 280 parts of water.

3. The weather-resistant exterior wall thermal insulation coating according to claim 1, characterized in that: By weight, it includes the following raw materials: 28 parts of coral powder, 35 parts of expanded vermiculite, 13 parts of polyvinyl butyral emulsion, 0.8 parts of amino silicone oil, 7 parts of cyclohexanone, 2 parts of starch ether, 0.6 parts of microcrystalline cellulose, 3 parts of sodium silicate, 5 parts of phosphonate, 12 parts of nano clay, 10 parts of defoaming agent and 300 parts of water.

4. The weather-resistant exterior wall thermal insulation coating according to any one of claims 1 to 3, characterized in that: The fineness of the coral powder and expanded vermiculite is 800-1000 meshes respectively.

5. The weather-resistant exterior wall thermal insulation coating according to any one of claims 1 to 3, characterized in that: The coral powder includes: red coral powder and / or white coral powder.

6. The weather-resistant exterior wall thermal insulation coating according to claim 5, characterized in that: When the coral powder includes red coral powder and white coral powder, the mass ratio of the red coral powder to the white coral powder is 1:1-2.

7. The method for preparing the weather-resistant exterior wall thermal insulation coating according to any one of claims 1 to 3, characterized in that: The steps include: Adding coral powder, expanded vermiculite, polyvinyl butyral emulsion, amino silicone oil, cyclohexanone, starch ether, microcrystalline cellulose, sodium silicate, phosphonate, nano clay and defoamer into water in sequence to obtain a mixture; The mixture is heated and cooled in sequence to obtain a weather-resistant exterior wall thermal insulation coating.

8. The preparation method according to claim 7, characterized in that: The heating temperature is 50-55°C and the heating time is 40-60 minutes.

9. The preparation method according to claim 7 or 8, characterized in that: The heating process is accompanied by stirring; the stirring speed is 800-1200 rpm.

10. The preparation method according to claim 7, characterized in that: The cooling temperature is 20-30°C.