CN112341931A - A kind of water-based reflective thermal insulation coating and preparation method and use thereof - Google Patents

Abstract

The invention provides a water-based reflective heat-insulating coating and a preparation method and application thereof, wherein the water-based reflective heat-insulating coating comprises the following components in parts by weight: 30-45 parts of fluorosilicone emulsion, 20-35 parts of silicone-acrylic emulsion, 9-18 parts of filler, 15-25 parts of nano titanium dioxide, 0.2-3 parts of waterborne floating aluminum paste, 0.2-3 parts of waterborne non-floating aluminum paste, 0.9-4.5 parts of film-forming assistant and 0.1-0.8 part of bacteriostatic agent.

Description

A kind of water-based reflective thermal insulation coating and preparation method and use thereof

technical field

The invention relates to the field of coatings, in particular to a water-based reflective heat-insulating coating and a preparation method and application thereof.

Background technique

Under the scorching sun in summer, the atmospheric temperature is generally above 30°C. When the outer surfaces of building materials such as cement, concrete, ceramic tiles, metal, thermal insulation bricks, and glass are exposed to the sun for a long time, their temperature can reach 40-50°C. , and when the color steel plate, waterproof material, etc. are exposed to the sun for a long time, the temperature can even reach the scalding temperature of 60-70 ℃. The above situation adversely affects normal human habitation, material storage, and equipment safety.

It is known in the art that using reflective heat-insulating paint on the surface of a building can effectively reduce the temperature on the surface and inside of the building, and can alleviate the temperature change on the surface of the building, and has a good protective effect on the building. This is mainly due to the high reflection of the heat rays of sunlight and the high emission of high far-infrared rays after the reflective thermal insulation coating is formed into a film, thereby effectively isolating solar radiation, reducing indoor temperature and saving refrigeration and air conditioning. effect of power consumption. Reflective thermal insulation coating is a new material for building energy saving, and it has now been applied to actual building energy saving projects. However, most of the current reflective energy-saving paints are acrylic paints, which have the disadvantage of not being stained with time. Generally speaking, the reflective effect of acrylic paint will decrease by 50% within 3 years. In some cities with severe air pollution, the reflective effect will decrease faster, and the reflective effect will usually decrease by 50% in less than 2 years.

At present, the strategy of “saving expenditure and reducing consumption” is being implemented in the field of railway facility construction and maintenance, and the energy saving of a large number of stations and houses is one of its contents. However, since the construction scale of railway passenger station buildings is generally large, oversized metal roofs are generally used, and people are densely populated, the requirements for indoor temperature comfort and energy saving are relatively high. Therefore, there is a need in the art to provide a reflective thermal insulation coating, the performance of which is significantly improved compared with the existing reflective thermal insulation coatings, and is especially suitable for railway station roofs.

SUMMARY OF THE INVENTION

In view of the above problems, the purpose of the present invention is to provide a water-based reflective heat-insulating paint and its preparation method and application. The coating provided by the invention has excellent adhesion, is especially suitable for railway station roofs, can reduce indoor temperature and improve the waterproof effect of station buildings, is convenient and quick to use, and has significantly improved durability and service life.

The technical solution for achieving the above purpose is as follows.

In one aspect, the present invention provides a water-based reflective heat-insulating paint, wherein, in parts by weight, the water-based reflective heat-insulating paint comprises the following components: 30-45 parts of fluorosilicone emulsion, 20-35 parts of silicone-acrylic emulsion, 9-18 parts of filler, 15-25 parts of nano-titanium dioxide, 0.2-3 parts of water-based floating aluminum-silver paste, 0.2-3 parts of water-based non-floating aluminum-silver paste, 0.9-4.5 parts of film-forming aids, and 0.1- 0.8 servings;

Preferably, in parts by weight, the water-based reflective thermal insulation coating comprises the following components: 33-38 parts of fluorosilicone emulsion, 25-32 parts of silicone-acrylic emulsion, 13.5-16.5 parts of filler, 15-18 parts of nano-titanium dioxide, 0.5-3 parts of water-based floating aluminum-silver paste, 0.5-3 parts of water-based non-floating aluminum-silver paste, 1.5-3 parts of film-forming aids, and 0.2-0.5 parts of bacteriostatic agents;

More preferably, in parts by weight, the water-based reflective heat-insulating coating comprises the following components: 38 parts of fluorosilicon emulsion, 25 parts of silicone-acrylic emulsion, 13.5 parts of filler, 18 parts of nano-titanium dioxide, and 1.5 parts of water-based floating aluminum-silver paste parts, 1.5 parts of water-based non-floating aluminum silver paste, 2.1 parts of film-forming aids, and 0.4 parts of bacteriostatic agents;

Preferably, the fluorosilicone emulsion is SD-5681 fluorosilicone emulsion;

Preferably, the silicon-acrylic emulsion is SD-528 silicon-acrylic emulsion;

Preferably, the filler comprises hollow ceramic microbeads, phase change microparticles, and nano aerogel micropowder; further preferably, the weight ratio of the hollow ceramic microbeads, phase change microparticles and nano aerogel micropowder is 1:1: 1; Still further preferably, the average particle size of the hollow ceramic microbeads is 50 μm; still further preferably, the phase change particles are organic phase change material microcapsules, the average particle size is 40 μm, and the phase change temperature is 35° C. ; Further preferably, the nano aerogel micropowder can be KPore-G200 nano aerogel micropowder;

Preferably, the nano titanium dioxide is rutile titanium dioxide;

Preferably, the particle size of the water-based floating aluminum-silver paste is 800 meshes;

Preferably, the particle size of the water-based non-floating aluminum-silver paste is 800 meshes;

Preferably, the weight ratio of the water-based floating aluminum-silver paste to the water-based non-floating aluminum-silver paste is 1:1;

NC多聚磷酸钠盐分散剂；又进一步优选地，所述消泡剂为DH-202消泡剂；更进一步优选地，所述流变助剂为RHEOLATE299水性流变助剂；Preferably, the film-forming aid comprises a dispersant, a defoamer and a rheology aid; further preferably, the weight ratio of the dispersant, the defoamer and the rheology aid is 1:1:1; Further preferably, the dispersant is

NC polyphosphate sodium salt dispersant; further preferably, the defoamer is DH-202 defoamer; further preferably, the rheology aid is RHEOLATE299 aqueous rheology aid;

Preferably, the bacteriostatic agent is DEUADD MB-11 aqueous preservative;

In some specific embodiments of the present invention, in the water-based reflective thermal insulation coating of the present invention, the fluorosilicon emulsion is purchased from Nantong Shengda Chemical Co., Ltd., industrial grade. Silicone-acrylic emulsion was purchased from Nantong Shengda Chemical Co., Ltd., industrial grade. The hollow ceramic microspheres were purchased from Shanghai Huijing Sub-nano New Materials Co., Ltd., with an average particle size of 50 μm. The phase change particles were purchased from Hubei Thermo New Energy Technology Co., Ltd., the model is TH-ME35, the average particle size is 40 μm, and the phase change temperature is 35 °C. Nano aerogel powder was purchased from Suzhou Tongxuan New Materials Co., Ltd. Nano-titanium dioxide was purchased from Japan Ishihara Company. The water-based floating aluminum-silver paste and the water-based non-floating aluminum-silver paste were purchased from Suzhou Mantebo Alloy Materials Co., Ltd., and the weight ratio of the two was 1:1. The dispersant was purchased from Shanghai Tongyang Chemical Co., Ltd., the defoamer was purchased from Shanghai Dinghe Chemical Technology Co., Ltd., the rheological additive was purchased from Shanghai Kaiyin Chemical Co., Ltd., and the bacteriostatic agent was purchased from Guangzhou Jinshengji Chemical Co., Ltd.

On the other hand, the present invention also provides a preparation method of the above-mentioned water-based reflective thermal insulation coating, the method comprising the following steps:

1) Place the pre-weighed fluorosilicone emulsion, silicone acrylic emulsion, water-based floating aluminum-silver paste, water-based non-floating aluminum-silver paste, film-forming aids, and bacteriostatic agents in a container, at a rate of 1000-1200 r/min. The stirring speed is dispersed for 10-15 minutes to obtain a premix;

2) In a stirring state, add filler and nano-titanium dioxide to the premix obtained in step 1), then stir and disperse for 20-30 minutes at a rate of 1000-1500 r/min, and grind to obtain.

Preferably, in step 1), the stirring rate is 1100-1200r/min, preferably 1200r/min;

Preferably, in step 1), the dispersion time is 12-14 minutes, preferably 14 minutes;

Preferably, in step 2), the stirring rate is 1300-1450r/min, preferably 1400r/min;

Preferably, in step 2), the dispersion time is 24-28 minutes, preferably 26 minutes.

In yet another aspect, the present invention also provides a thermal insulation system, wherein, when applied to a non-metallic base surface, the thermal insulation system comprises a sealing layer and a reflective thermal insulation coating; when applied to a metal base surface, the thermal insulation system The thermal insulation system includes an anti-corrosion primer layer and a reflective thermal insulation coating; wherein, the reflective thermal insulation coating is formed from the above-mentioned water-based reflective thermal insulation coating by scraping or spraying.

Preferably, the sealing layer is formed by scraping or spraying an epoxy-based sealing primer; according to a specific embodiment of the present invention, the epoxy-based sealing primer is a water-based epoxy sealing primer, purchased from Langfang Santong Chemical Industry Co., Ltd.

Preferably, the anti-corrosion primer layer is ZD800 (W) water-based epoxy zinc-rich primer; according to a specific embodiment of the present invention, the ZD800 (W) water-based epoxy zinc-rich primer is purchased from Tianjin Shuangshi Paint Ltd.

Preferably, the blade or spray thickness of the reflective heat-insulating coating is 800-1500 μm; more preferably 900-1300 μm; further preferably 1000 μm.

In another aspect, the present invention also provides the use of the water-based reflective heat-insulating paint of the present invention in the protection of the building surface and the surface of the ballastless track structure.

In yet another aspect, the present invention provides an application method of the above-mentioned water-based reflective thermal insulation coating, the method comprising:

1) Scratch or spray the sealing layer/anti-corrosion primer layer on the base surface to be protected;

2) Scratch or spray the above water-based reflective heat-insulating paint on the sealing layer/anti-corrosion primer layer of step 1).

Preferably, the sealing layer is formed by scraping or spraying epoxy sealing primer;

Preferably, the anti-corrosion primer layer is ZD800(W) water-based epoxy zinc-rich primer.

The water-based reflective heat-insulating paint provided by the present invention has at least the following advantages:

1. The water-based reflective heat-insulating paint provided by the present invention has the effect of reflecting sunlight. When used on the roof, it can reduce the temperature rise caused by sunlight, reduce the indoor ambient temperature, and significantly promote energy saving and consumption reduction. In addition, the water-based reflective heat-insulating paint provided by the present invention has excellent physical and mechanical properties, adhesion and ultraviolet radiation properties, and will not cause damage such as discoloration, cracking and peeling after long-term use, and can play an efficient protective role.

2. The water-based reflective heat-insulating paint provided by the present invention adopts appropriate proportions of fluorosilicon emulsion, silicone-acrylic emulsion, filler, nano-titanium dioxide, water-based floating aluminum-silver paste, and water-based non-floating aluminum-silver paste, among which the fluorosilicon emulsion It is mixed with silicone-acrylic emulsion as a film-forming substance of the coating, so that the obtained coating film has the effects of anti-fouling, dust-proof and weather resistance, and at the same time, after the coating film is cured, a hydrophobic layer can be formed on the surface to avoid freeze-thaw damage; water-based The non-floating aluminum-silver paste can make the aluminum powder form a sheet at the middle or bottom of the reflective heat-insulating coating formed by the water-based reflective heat-insulating coating of the present invention, and the water-based floating aluminum-silver paste can make the aluminum powder in the reflective heat-insulating coating of the present invention. The surface position of the coating is in flakes, thereby forming a "double aluminum film" reflection. At the same time, the rutile-type nano-titanium dioxide also has a good reflection effect on sunlight, which greatly improves the sunlight reflectivity of the water-based reflective heat-insulating paint of the present invention under multiple effects. In addition, the use of silicone-acrylic emulsion and fluorosilicone emulsion to form a film can effectively improve the anti-fouling, dust-proof and other effects, and avoid the reduction of reflection effect caused by the adhesion of pollutants over time; the addition of silicone-acrylic emulsion to fluorosilicone The modification of the emulsion can also greatly improve the adhesion of the reflective thermal insulation coating to solid particles (particle fillers) and primers (ie sealer/anti-corrosion primer layer), and at the same time can improve the overall thermal insulation system formed. performance. The combined use of hollow ceramic microbeads, phase change particles, and nano-aerogel micropowders can greatly reduce the thermal conductivity of the coating, especially the addition of phase change particles, which can absorb heat when the phase transition temperature is exceeded and maintain the reflection. The temperature of the thermal insulation coating system is below the set temperature, which can effectively control the peak temperature in extreme high temperature weather and ensure the energy saving effect of the water-based reflective thermal insulation coating of the present invention.

3. The water-based reflective heat-insulating paint provided by the present invention can also be used for the surface protection of the ballastless track structure. When it is painted on the surface of the concrete track slab under the rail or the surface of the ballast slab, the water-based reflective heat-insulating paint can reduce the amount of heat generated by the water-based reflective heat-insulating paint. The temperature difference between day and night caused by the accumulation of sunlight and heat can reduce the warpage of the track slab, reduce or even eliminate the damage of the slab corner seam or the arch of the track slab. sex.

4. The water-based reflective heat-insulating paint provided by the present invention can be applied to the surface of the substrate to be protected by spraying and brushing. Various equipment can be used for construction, and the staff can more easily select the appropriate one according to the actual situation of on-site painting. construction equipment. It can be seen that the water-based reflective heat-insulating paint provided by the present invention is more convenient to use.

5. The thermal insulation system provided by the present invention makes the surface of the substrate form a sealing layer/anti-corrosion primer layer and a reflective thermal insulation layer from bottom to top, which ensures the reliable adhesion of the reflective thermal insulation coating system.

Description of drawings

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of a roof color steel base surface after being coated with the water-based reflective heat-insulating paint of the present invention.

Detailed ways

The present invention will be described below with reference to specific examples. Those skilled in the art can understand that these examples are only for illustrating the present invention, and they do not limit the scope of the present invention in any way.

The experimental methods in the following examples are conventional methods unless otherwise specified. The raw materials, reagent materials, etc. used in the following examples are all commercially available products unless otherwise specified.

In the following examples, the fluorosilicon emulsion used was purchased from Nantong Shengda Chemical Co., Ltd., industrial grade. Silicone-acrylic emulsion was purchased from Nantong Shengda Chemical Co., Ltd., industrial grade. The hollow ceramic microspheres were purchased from Shanghai Huijing Sub-nano New Materials Co., Ltd., with an average particle size of 50 μm. The phase change particles were purchased from Hubei Thermo New Energy Technology Co., Ltd., the model is TH-ME35, the average particle size is 40 μm, and the phase change temperature is 35 °C. Nano aerogel powder was purchased from Suzhou Tongxuan New Materials Co., Ltd. Nano-titanium dioxide was purchased from Japan Ishihara Company. The water-based floating aluminum-silver paste and the water-based non-floating aluminum-silver paste were purchased from Suzhou Mantebo Alloy Materials Co., Ltd., and the weight ratio of the two was 1:1. The dispersant was purchased from Shanghai Tongyang Chemical Co., Ltd., the defoamer was purchased from Shanghai Dinghe Chemical Technology Co., Ltd., the rheological additive was purchased from Shanghai Kaiyin Chemical Co., Ltd., and the bacteriostatic agent was purchased from Guangzhou Jinshengji Chemical Co., Ltd.

The anti-corrosion primer used was ZD800 (W) water-based epoxy zinc-rich primer, purchased from Tianjin Shuangshi Paint Co., Ltd.

Example 1 Water-based reflective thermal insulation coating

In this example, in parts by weight, the prepared water-based reflective thermal insulation coating is made of the following components: 30 parts of fluorosilicone emulsion, 35 parts of silicone-acrylic emulsion, 3 parts of hollow ceramic microbeads, and 3 parts of phase change particles parts, 3 parts of nano aerogel powder, 20 parts of nano titanium dioxide, 0.35 parts of water-based floating aluminum silver paste, 0.35 parts of water-based non-floating aluminum silver paste, 1.5 parts of dispersant, 1.5 parts of defoamer, 1.5 parts of rheology additives part, 0.8 part of bacteriostatic agent;

Its preparation method is as follows:

Put fluorosilicone emulsion, silicone acrylic emulsion, water-based floating aluminum silver paste, water-based non-floating aluminum silver paste, film-forming aids, and bacteriostatic agents in a container, and disperse at a stirring speed of 1200 r/min for 14 minutes to obtain a mixture. Add filler and nano-titanium dioxide to the premix while stirring, and then stir and disperse at 1400 r/min for 26 minutes, and grind to obtain.

Examples 2 to 6 and Comparative Examples 1 to 5: Waterborne Reflective Thermal Insulation Coatings

Examples 2 to 6 and Comparative Examples 1 to 5 were all prepared according to the preparation method in Example 1, and the specific component compositions are shown in Table 1.

Table 1: Component composition of the water-based reflective thermal insulation coatings prepared in Examples 1-6 and Comparative Examples 1-5.

Example 7: Performance Test

1. Preparation of test samples

In order to better simulate the actual application conditions, in this example, the thermal insulation system of "anti-corrosion primer layer + reflective thermal insulation coating" is used for performance test, the test sample is 3mm sandblasted steel plate, and the anti-corrosion primer is ZD800(W) water-based Epoxy zinc-rich primer (Tianjin Shuangshi Coating Co., Ltd.), according to different test requirements, scrape the reflective thermal insulation coating for performance testing, among which the supporting reflective thermal insulation coating for salt spray resistance and sunlight reflection ability test The layer thickness is 1.0 mm.

The method for preparing the reflective thermal barrier coating test panel is as follows:

Step 1: Clean up the floating dust and dirt on the surface of the base surface, and spray the anti-corrosion primer after the surface is dry;

Step 2: After spraying the anti-corrosion primer for 24 hours or after the primer is dry, brush the water-based reflective thermal insulation coating;

Step 3: After brushing the water-based reflective heat-insulating paint for 24 hours or after the reflective heat-insulating paint is dry, it is obtained.

In this embodiment, the thickness of the anti-corrosion primer layer is to completely cover the base surface, the dry film thickness of the water-based reflective heat insulation layer is 1300 μm, and the specific coating structure of the present invention is shown in FIG. 1 .

The test panels prepared from the water-based reflective thermal insulation coatings of Examples 1 to 6 and Comparative Examples 1 to 5 were named as Samples 1-6 and Comparative Samples 1-5, respectively.

2. Performance test

The performance test results of samples 1-6 and comparative samples 1-5 are shown in Table 2. in,

The applicable period shall be tested according to the provisions of TB/T1527-2011;

Low temperature flexibility (-40℃) is tested according to GB/T 6742-2007;

Adhesion is tested according to GB/T 5210-2006;

Solar reflectance, near-infrared reflectance, hemispheric emissivity, change rate of solar reflectance after pollution, change rate of sunlight reflectance after artificial weathering, and thermal insulation temperature difference are tested according to the provisions of JG/T 235-2014;

The resistance to artificial accelerated aging shall be tested according to the provisions of GB/T14522-2008;

After testing, the pot life of samples 1-6 and comparative samples 1-5 is more than 90min, which can meet the operation requirements.

Table 2 Performance test results of Examples 1-6 and Comparative Examples 1-5

It can be seen from the above content that the reflective thermal insulation layer formed by the water-based reflective thermal insulation coating provided by the present invention has good adhesion, heat reflection and thermal insulation performance, its resistance to artificial accelerated aging can reach more than 3000h, and the solar reflectance ratio exceeds 90. %, these excellent properties can well ensure the service durability of the reflective thermal insulation coating of the present invention, and can effectively prevent the temperature rise/temperature difference deformation of components.

Table 2 shows that the properties of Examples 1-6 are significantly better than those of Comparative Examples 1-5, especially the artificial accelerated aging resistance and the outstanding solar reflectance, which can effectively improve the durability and structural stability of the protective base surface. protection.

In a word, the above description of the specific embodiments of the present invention does not limit the present invention, and those skilled in the art can make various changes or modifications according to the present invention, as long as they do not depart from the spirit of the present invention, they should all belong to the scope of the appended claims of the present invention .

Claims (9)

1. A water-based reflective heat-insulating paint, wherein, in parts by weight, the water-based reflective heat-insulating paint comprises the following components: 30-45 parts of fluorosilicone emulsion, 20-35 parts of silicone-acrylic emulsion, 9-18 parts of filler parts, 15-25 parts of nano titanium dioxide, 0.2-3 parts of water-based floating aluminum-silver paste, 0.2-3 parts of water-based non-floating aluminum-silver paste, 0.9-4.5 parts of film-forming aids, and 0.1-0.8 parts of bacteriostatic agents. 2. The water-based reflective heat-insulating paint according to claim 1, wherein, in parts by weight, the water-based reflective heat-insulating paint comprises the following components: 33-38 parts of fluorosilicone emulsion, 25-32 parts of silicon-acrylic emulsion , 13.5-16.5 parts of filler, 15-18 parts of nano-titanium dioxide, 0.5-3 parts of water-based floating aluminum silver paste, 0.5-3 parts of water-based non-floating aluminum silver paste, 1.5-3 parts of film-forming aids, 0.2 parts of bacteriostatic agent - 0.5 servings; Preferably, in parts by weight, the water-based reflective heat-insulating paint comprises the following components: 38 parts of fluorosilicon emulsion, 25 parts of silicone-acrylic emulsion, 13.5 parts of filler, 18 parts of nano-titanium dioxide, and 1.5 parts of water-based floating aluminum-silver paste , 1.5 parts of water-based non-floating aluminum silver paste, 2.1 parts of film-forming aids, and 0.4 parts of bacteriostatic agent. 3. The water-based reflective thermal insulation coating according to claim 1 or 2, wherein the fluorosilicon emulsion is SD-5681 fluorosilicon emulsion; Preferably, the silicon-acrylic emulsion is SD-528 silicon-acrylic emulsion; Preferably, the filler comprises hollow ceramic microbeads, phase change microparticles, and nano aerogel micropowder; further preferably, the weight ratio of the hollow ceramic microbeads, phase change microparticles and nano aerogel micropowder is 1:1: 1; Still further preferably, the average particle size of the hollow ceramic microbeads is 50 μm; still further preferably, the phase change particles are organic phase change material microcapsules, the average particle size is 40 μm, and the phase change temperature is 35° C. ; Further preferably, the nano aerogel micropowder can be KPore-G200 nano aerogel micropowder; Preferably, the nano titanium dioxide is rutile titanium dioxide; Preferably, the particle size of the water-based floating aluminum-silver paste is 800 meshes; Preferably, the particle size of the water-based non-floating aluminum-silver paste is 800 meshes; Preferably, the weight ratio of the water-based floating aluminum-silver paste to the water-based non-floating aluminum-silver paste is 1:1; Preferably, the film-forming aid comprises a dispersant, a defoamer and a rheology aid; further preferably, the weight ratio of the dispersant, the defoamer and the rheology aid is 1:1:1; Further preferably, the dispersant is

Sodium polyphosphate dispersant; further preferably, the defoamer is DH-202 defoamer; further preferably, the rheology aid is RHEOLATE299 aqueous rheology aid; Preferably, the bacteriostatic agent is DEUADD MB-11 aqueous preservative. 4. the preparation method of the water-based reflective thermal insulation coating described in any one of claim 1-3, described method comprises the steps: 1) Place the pre-weighed fluorosilicone emulsion, silicone acrylic emulsion, water-based floating aluminum-silver paste, water-based non-floating aluminum-silver paste, film-forming aids, and bacteriostatic agents in a container, at a rate of 1000-1200 r/min. The stirring speed is dispersed for 10-15 minutes to obtain a premix; 2) In a stirring state, add filler and nano-titanium dioxide to the premix obtained in step 1), then stir and disperse for 20-30 minutes at a rate of 1000-1500 r/min, and grind to obtain. 5. The preparation method according to claim 4, wherein, in step 1), the stirring rate is 1100-1200r/min; preferably 1200r/min; Preferably, in step 1), the dispersion time is 12-14 minutes, more preferably 14 minutes; Preferably, in step 2), the stirring rate is 1300-1450r/min, more preferably 1400r/min; Preferably, in step 2), the dispersion time is 24-28 minutes, more preferably 26 minutes. 6. A thermal insulation system, wherein, when applied to a non-metallic base, the thermal insulation system comprises a sealing layer and a reflective thermal insulation coating; when applied to a metallic base, the thermal insulation system comprises an anti-corrosion base A paint layer and a reflective thermal insulation coating, wherein the reflective thermal insulation coating is formed from the water-based reflective thermal insulation coating according to any one of claims 1 to 3 by scraping or spraying. 7. The thermal insulation system according to claim 6, wherein the sealing layer is formed by blade coating or spraying of epoxy sealing primer; Preferably, the anti-corrosion primer layer is ZD800 (W) water-based epoxy zinc-rich primer; Preferably, the blade or spray thickness of the reflective thermal insulation coating is 800-1500 μm; more preferably 900-1300 μm; further preferably 1000 μm. 8. Use of the water-based reflective thermal insulation coating according to any one of claims 1 to 3 or the thermal insulation system of claims 6 to 7 in the protection of building surfaces and surfaces of ballastless track structures. 9. The application method of the water-based reflective thermal insulation coating of any one of claims 1-3, the method comprising: 1) Scratch or spray the sealing layer/anti-corrosion primer layer on the base surface to be protected; 2) scraping or spraying the water-based reflective heat-insulating paint described in any one of claims 1-3 on the sealing layer/anti-corrosion primer layer of step 1); Preferably, the sealing layer is formed by scraping or spraying epoxy sealing primer; Preferably, the anti-corrosion primer layer is ZD800(W) water-based epoxy zinc-rich primer.

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