Self-cleaning high-weatherability high-radiation refrigeration coating and preparation method thereof

Abstract

The application relates to a self-cleaning high-weather-resistance high-radiation refrigeration coating and a preparation method thereof, which comprises the following components: a self-cleaning fluorocarbon emulsion, hydroxyethyl cellulose, an electroless refrigeration powder, modified rare earth oxide, a covering polymer emulsion, an additive and water; wherein the self-cleaning fluorocarbon emulsion is a core-shell structure self-cleaning fluorocarbon emulsion; in the core-shell structure, the core structure is obtained by polymerization of acrylate monomers; and the shell structure is obtained by reaction of fluorine-containing acrylate monomers, a silane coupling agent and acrylate monomers. The fluorocarbon chain segments in the multiple components can be physically entangled, synergistic effect is achieved, the strength of the film layer net structure is further improved, and the coating film is endowed with excellent weather resistance, stain resistance and a longer service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular to a self-cleaning high-weather-resistant high-radiation refrigeration coating and a preparation method thereof. BACKGROUND

[0002] With the acceleration of industrialization and urbanization, global greenhouse gas emissions have surged, triggering climate warming. Extreme weather events such as heat waves, droughts, and floods occur frequently, seriously threatening human society and the natural ecosystem. At the same time, global energy consumption is rising, especially the widespread use of fossil fuels, which not only triggers an energy crisis but also exacerbates environmental damage and climate anomalies.

[0003] In the face of this challenge, developing energy-saving green building materials has become an effective strategy for the construction industry to cope with climate change, resource scarcity, and health needs. Energy-saving green coatings are designed to improve building energy efficiency and reduce environmental impact, saving resources and energy throughout the life cycle and improving living comfort. With increasingly severe climate and energy problems, energy-saving green coatings are increasingly valued in new building construction and existing building renovation, and have become an important means of achieving green transformation in the construction industry. However, the existing new energy-saving green coating, radiation refrigeration coating, has the following three problems: first, the solar reflectance of the coating film is low, and the radiation cooling performance is poor; second, the weather resistance of the coating film is poor, greatly shortening the service life of the coating film and affecting its large-scale popularization and use; third, the coating film has poor self-cleaning and poor stain resistance, and after pollution, the reflectance of sunlight and near-infrared is greatly reduced, affecting its radiation and heat insulation performance.

[0004] Therefore, it is urgent to develop a self-cleaning, high-weather-resistant radiation refrigeration coating to meet the practical needs of modern green buildings. SUMMARY

[0005] Based on this, the present application develops a self-cleaning high-weather-resistant high-radiation refrigeration coating and a preparation method thereof. The coating not only solves the problem of poor radiation cooling performance of existing products, with the solar reflectance of the coating film increased from the existing 86% to 95%, but also solves the problems of poor weather resistance and stain resistance, thereby improving the service life of the paint film. At the same time, it is particularly emphasized that the self-cleaning high-weather-resistant radiation refrigeration coating provided by the present application has excellent weather resistance and stain resistance, can give the coating film a long service life, and brings all-round decoration and protection to the facade of the building.

[0006] One object of the present application is to provide a self-cleaning high-weather-resistant high-radiation refrigeration coating, which comprises the following components in mass fraction:

[0007]

[0008]

[0009] The self-cleaning fluorocarbon emulsion is a self-cleaning fluorocarbon emulsion with a core-shell structure.

[0010] In the core-shell structure, the core structure is obtained by polymerization of an acrylate monomer;

[0011] The shell structure is obtained by reaction of a fluorine-containing acrylate monomer, a silane coupling agent and an acrylate monomer.

[0012] The modified rare earth oxide is a methacrylic acid dodecafluoroheptyl ester modified rare earth oxide.

[0013] Further, the acrylate monomer is selected from one or more of n-butyl acrylate, hydroxypropyl methacrylate, butyl acrylate, methyl methacrylate, and hydroxypropyl acrylate.

[0014] The present application uses electroless refrigeration powder and rare earth oxide as thermal insulation filler. The electroless refrigeration powder is a special electroless refrigeration composite pigment composed of high band gap and high refractive index nano inorganic materials, which replaces traditional rutile titanium dioxide with low band gap and strong absorption of ultraviolet rays in sunlight, achieving high reflectivity of full-band solar radiation including ultraviolet, visible and near-infrared, emitting absorbed solar radiation energy to cold outer space, and achieving all-weather refrigeration effect. At the same time, the modified rare earth oxide not only has good hiding power, but also has excellent thermal insulation performance. It converts light energy into heat energy through the change of active valence of rare earth oxide, and then radiates heat energy to achieve good thermal insulation effect. The thermal insulation principle of traditional thermal insulation titanium dioxide is different. The two work together to further improve the refrigeration effect of the coating film.

[0015] Specifically, the hiding polymer emulsion is selected from one or more of Dow E, Ross HE-380, and Wanhua H400.

[0016] In particular, the hiding polymer emulsion has a hollow structure of polymer, which can improve the hiding power, thermal insulation and rheological property of the paint film.

[0017] The present application selects a hiding polymer emulsion as an auxiliary filler, which not only improves the hiding power of the coating film, but also further improves the thermal insulation performance of the coating film and improves the rheological property of the coating due to its hollow structure, thereby improving the workability and refrigeration effect of the coating.

[0018] Further, the auxiliary agent is selected from one or more of a dispersing agent, a wetting agent, a defoaming agent, a pH adjusting agent, a film forming aid, an antifreeze agent, a thickening agent, a leveling agent, and an antiseptic and bactericidal agent.

[0019] Specifically, the rare earth oxide is selected from one or more of lanthanum oxide, cerium oxide, and samarium oxide.

[0020] In particular, the hydroxyethyl cellulose has a viscosity of 150-500 CPS, which can impart the product with good flowability and leveling property, while having good sag resistance and storage property.

[0021] In particular, the dispersant has super strong dispersing capacity and excellent stability, while improving the water resistance of the product.

[0022] In particular, the wetting agent is selected from one or more of alkyl benzene sulfonate, fatty alcohol polyoxyethylene ether sulfate, or polyoxyethylene alkyl phenol ether.

[0023] In particular, the pH adjuster is selected from one of an aqueous organic amine solution, an aqueous organic silicon solution, or an aqueous hydroxide solution.

[0024] In particular, the electroless refrigeration powder has extremely high reflectivity to ultraviolet light, visible light, and near-infrared light, and also has high hiding power and high atmospheric window emissivity, thereby imparting the paint film with excellent radiation refrigeration properties.

[0025] In particular, the rare earth oxide has good hiding power and heat insulation properties, and can especially absorb ultraviolet light, visible light, and infrared light, and convert the light energy into heat energy through the change of the active valence of the rare earth oxide, and then radiate the heat energy to achieve good heat insulation effect.

[0026] In particular, the thickening agent is selected from a polyurethane thickening agent, which has excellent phase compatibility, thickening leveling property, and water and alkali resistance.

[0027] In particular, the leveling agent is selected from one of a silicone leveling agent or an acrylic leveling agent.

[0028] In particular, the preservative bactericide is selected from one of a benzisothiazolinone or a methylisothiazolinone.

[0029] Another object of the present application is to provide a preparation method of the self-cleaning high-weather-resistant high-radiation-refrigeration paint.

[0030] S1. uniformly mixing several kinds of acrylate monomers to obtain a core prepolymer mixture;

[0031] S2. uniformly mixing fluorine-containing acrylate monomers, a silane coupling agent, and acrylate monomers to obtain a shell prepolymer mixture;

[0032] S3. adding the core prepolymer mixture into a solvent, adding an initiator and an emulsifier, and heating to react to obtain a seed emulsion;

[0033] S4. The shell prepolymer mixture and initiator are added to the seed emulsion, and the reaction is heated to obtain a self-cleaning fluorocarbon emulsion;

[0034] S5. The rare earth oxide is reacted with the silane coupling agent, and then methyl methacrylate dodecafluoroheptyl ester and an initiator are added, and the reaction is heated to obtain a modified rare earth oxide;

[0035] S6. The self-cleaning fluorocarbon emulsion, modified rare earth oxide, and other ingredients are blended to obtain a self-cleaning high-weathering high-radiation refrigeration coating.

[0036] Specifically, the self-cleaning fluorocarbon emulsion imparts good hydrophobic self-cleaning effect to the coating film, which can significantly improve the stain resistance of the coating film, thereby effectively solving the problem of poor weather resistance and stain resistance of existing products.

[0037] Further, in step S3, the heating temperature is 80-95℃.

[0038] Further, in step S4, the heating temperature is 75-85℃.

[0039] Further, in step S5, the heating temperature is 80-85℃.

[0040] Further, the emulsifier is a mixture of sodium dodecyl sulfate and alkylphenol polyoxyethylene ether.

[0041] Further, the initiator is selected from potassium persulfate.

[0042] Specifically, the mass ratio of sodium dodecyl sulfate (SDS) to alkylphenol polyoxyethylene ether (OP-10) is 1-2:2-3.

[0043] Further, the initiator is selected from one or more of potassium persulfate, ammonium persulfate.

[0044] The present application has the following beneficial effects:

[0045] The present application adopts self-cleaning fluorocarbon emulsion with core-shell structure and methyl methacrylate dodecafluoroheptyl ester modified rare earth oxide as the components of the coating; firstly, the rare earth oxide is modified by silane coupling agent, and then polymerization reaction is carried out with methyl methacrylate dodecafluoroheptyl ester under the action of initiator, so that fluorine-containing acrylate segment is introduced into the modified rare earth oxide, thereby improving the compatibility of the modified rare earth oxide and the components such as fluorocarbon emulsion, which is conducive to reducing the surface energy and improving the isolation effect on external light and heat; secondly, the product of polymerization of various acrylate monomers is used as the core structure, and then the product of reaction of fluorine-containing acrylate monomer, silane coupling agent and acrylate monomer is used as the shell structure, so as to obtain self-cleaning fluorocarbon emulsion with core-shell structure, wherein the fluorine-containing group, silane group and acrylate segment are introduced into the shell structure, which not only improves the compatibility between the components and is conducive to the improvement of stability, but also improves the hydrophobicity and self-cleaning performance of the coating; and the fluorocarbon segments in the various components can be physically entangled, so as to play a synergistic effect and further improve the strength of the membrane layer network structure, thereby endowing the coating film with excellent weather resistance, stain resistance and longer service life. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the technical solutions of the present application, the following examples are listed. The raw materials, reactions and post-treatment means appearing in the examples are all common raw materials on the market and technical means familiar to those skilled in the art, unless otherwise stated.

[0047] The words "preferred", "preferably", "more preferred" and the like in the present application refer to the embodiments of the present application which can provide certain beneficial effects in certain cases. However, other embodiments can also be preferred in the same or other cases. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not usable, nor is it intended to exclude other embodiments from the scope of the present application.

[0048] It should be understood that, except in any operational example or otherwise indicated, all numbers appearing in the specification and claims, expressing amounts of components as used for example, are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, numerical parameters set forth in the following specification and attached claims are approximations that can vary depending on the desired properties sought to be obtained in accordance with the present application.

[0049] Hydroxyethyl cellulose with a viscosity of 150-500 CPS, Plus 330 cellulose, purchased from Ashland Chemical Co., Ltd.

[0050] Electroless refrigeration powder, SC100A, purchased from Shanghai Xinsu Additives Co., Ltd.

[0051] Rare earth oxide, lanthanum oxide.

[0052] Latex, HE-380, purchased from Ross New Materials Technology Co., Ltd.

[0053] Dispersant, 731A, purchased from Dow Chemical.

[0054] Wetting agent, CA90, purchased from Dow Chemical.

[0055] Mineral oil defoamer, NXZ, purchased from Nopco Chemicals Co., Ltd.

[0056] pH regulator, AR-95, purchased from Shanghai Aolun Chemical Co., Ltd.

[0057] Film forming aid, TEXANOL alcohol ester twelve, purchased from Eastman Chemical.

[0058] Antifreeze, ethylene glycol, purchased from Guangdong Weida Chemical Co., Ltd.

[0059] Thickening agent, polyurethane thickening agent, 817W, purchased from Gote Waterborne Additives Co., Ltd.

[0060] Silicone defoamer, SN157, purchased from Nopco Chemicals Co., Ltd.

[0061] Leveling agent, NHS 300E, purchased from Ashland Chemical Co., Ltd.

[0062] Antiseptic and fungicide, MBS5050, purchased from Tor Speciality Chemicals Co., Ltd.

[0063] Initiator, potassium persulfate.

[0064] Emulsifier, a mixture of sodium dodecyl sulfate (SDS) and alkyl phenol polyoxyethylene ether (OP-10) with a mass ratio of 1:2.

[0065] Silane coupling agent aqueous solution, a 10% mass fraction of KH570 aqueous solution.

[0066] Example 1

[0067] A self-cleaning high-weatherability high-radiation refrigeration coating, comprising ingredients in mass fractions as follows:

[0068]

[0069]

[0070] The preparation method of the above-mentioned self-cleaning high-weatherability high-radiation refrigeration coating is as follows:

[0071] S1. Mix 53.4 g of n-butyl acrylate, 30.2 g of methyl methacrylate and 21.072 g of hydroxypropyl methacrylate uniformly to obtain a core prepolymer mixture;

[0072] S2. Mix 4.53 g of dodecafluoroheptyl methacrylate, 40 ml of 25 wt% silane coupling agent aqueous solution, 26.72 g of butyl acrylate, 15.104 g of methyl methacrylate and 10.536 g of hydroxypropyl acrylate uniformly to obtain a shell prepolymer mixture;

[0073] S3. Add the core prepolymer mixture into 400 g of deionized water, add 40 mL of 0.006 g / mL initiator solution (aqueous solution of potassium persulfate), after the dropwise addition is completed, warm to 50°C, add 4.8 g of emulsifier, after the emulsifier is completely dissolved, warm to 80°C and react for 2 h to obtain a seed emulsion;

[0074] S4. Slowly drop the shell prepolymer mixture and 160 mL of 0.006 g / mL aqueous solution of potassium persulfate into the above seed emulsion (dropwise addition is completed within 1 h), react for 2 h at 80°C, after cooling, adjust the pH value of the emulsion to 7 with an aqueous solution of potassium hydroxide to obtain a self-cleaning fluorocarbon emulsion;

[0075] S5-1. Mix the rare earth oxide with the aqueous solution of silane coupling agent, heat to 35°C, react for 30 min, then heat to 50°C, react for 3 h, after drying, obtain a pretreated rare earth oxide;

[0076] The amount of the silane coupling agent is 1 wt% of the mass of the rare earth oxide;

[0077] S5-2. Under the protection of nitrogen, disperse 10 g of the pretreated rare earth oxide in 150 ml of deionized water, add 8 g of dodecafluoroheptyl methacrylate, 0.5 g of potassium persulfate, heat to react at 80°C for 3 h, filter and wash, and dry to obtain a modified rare earth oxide;

[0078] S6. Blend the self-cleaning fluorocarbon emulsion, the modified rare earth oxide and other ingredients according to the above mass fractions to obtain a self-cleaning high-weather-resistance high-radiation refrigeration coating.

[0079] Example 2

[0080] A self-cleaning high-weather-resistance high-radiation refrigeration coating includes the following ingredients in mass fractions:

[0081]

[0082]

[0083] The preparation method of the above self-cleaning high-weather-resistance high-radiation refrigeration coating is:

[0084] S1. Mix 53.4 g of n-butyl acrylate, 30.2 g of methyl methacrylate and 21.072 g of hydroxypropyl methacrylate uniformly to obtain a core prepolymer mixture;

[0085] S2. Mix 4.53 g of dodecafluoroheptyl methacrylate, 40 ml of a 25 wt% aqueous silane coupling agent solution, 26.72 g of butyl acrylate, 15.104 g of methyl methacrylate and 10.536 g of hydroxypropyl acrylate uniformly to obtain a shell prepolymer mixture;

[0086] S3. Add the core prepolymer mixture to 400 g of deionized water, add 40 mL of a 0.006 g / mL initiator solution (aqueous potassium persulfate solution), and after the dropwise addition is complete, warm to 50°C, add 4.8 g of an emulsifier, and after the emulsifier is completely dissolved, warm to 80°C and react for 2 h to obtain a seed emulsion;

[0087] S4. Slowly drop the shell prepolymer mixture and 160 mL of a 0.006 g / mL aqueous potassium persulfate solution into the above seed emulsion (dropwise addition is completed within 1 h), react at 80°C for 2 h, and after cooling, adjust the pH of the emulsion to 7 with an aqueous potassium hydroxide solution to obtain a self-cleaning fluorocarbon emulsion;

[0088] S5-1. Mix the rare earth oxide with the aqueous silane coupling agent solution, heat to 35°C, react for 30 min, then heat to 50°C, react for 3 h, and after drying, obtain a pretreated rare earth oxide;

[0089] The amount of the silane coupling agent is 1 wt% of the mass of the rare earth oxide;

[0090] S5-2. Under the protection of nitrogen, disperse 10 g of the pretreated rare earth oxide in 150 ml of deionized water, add 8 g of dodecafluoroheptyl methacrylate, 0.5 g of potassium persulfate, heat to react at 80°C for 3 h, filter and wash, and after drying, obtain a modified rare earth oxide;

[0091] S6. Blend the self-cleaning fluorocarbon emulsion, the modified rare earth oxide and other ingredients according to the above mass fractions to obtain a self-cleaning high-weather-resistance high-radiation refrigeration coating.

[0092] Example 3

[0093] A self-cleaning high-weather-resistance high-radiation refrigeration coating includes ingredients in mass fractions as follows:

[0094]

[0095] The preparation method of the above self-cleaning high-weather-resistance high-radiation refrigeration coating is as follows:

[0096] S1. Mix 53.4 g of n-butyl acrylate, 30.2 g of methyl methacrylate and 21.072 g of hydroxypropyl methacrylate uniformly to obtain a core prepolymer mixture;

[0097] S2. Mix 4.53 g of dodecafluoroheptyl methacrylate, 40 ml of a 25wt% silane coupling agent aqueous solution, 26.72 g of butyl acrylate, 15.104 g of methyl methacrylate and 10.536 g of hydroxypropyl acrylate uniformly to obtain a shell prepolymer mixture;

[0098] S3. Add the core prepolymer mixture to 400 g of deionized water, add 40 mL of a 0.006 g / mL initiator solution (aqueous solution of potassium persulfate), and after the dropwise addition is completed, warm to 50°C, add 4.8 g of an emulsifier, and after the emulsifier is completely dissolved, warm to 80°C and react for 2 h to obtain a seed emulsion;

[0099] S4. Slowly drop the shell prepolymer mixture and 160 mL of a 0.006 g / mL aqueous solution of potassium persulfate into the above seed emulsion (dropwise addition is completed within 1 h), react at 80°C for 2 h, and after cooling, adjust the pH of the emulsion to 7 with an aqueous potassium hydroxide solution to obtain a self-cleaning fluorocarbon emulsion;

[0100] S5-1. Mix the rare earth oxide with the silane coupling agent aqueous solution, heat to 35°C, react for 30 min, then heat to 50°C, react for 3 h, and after drying, obtain a pretreated rare earth oxide;

[0101] The amount of the silane coupling agent is 1wt% of the mass of the rare earth oxide;

[0102] S5-2. Under the protection of nitrogen, disperse 10 g of the pretreated rare earth oxide in 150 ml of deionized water, add 8 g of dodecafluoroheptyl methacrylate, 0.5 g of potassium persulfate, heat to react at 80°C for 3 h, filter and wash, and after drying, obtain a modified rare earth oxide;

[0103] S6. Blend the self-cleaning fluorocarbon emulsion, the modified rare earth oxide and other ingredients according to the above mass fractions to obtain a self-cleaning high-weathering high-radiation refrigeration coating.

[0104] Comparative Example 1

[0105] The difference between this comparative example and Example 3 is that the self-cleaning fluorocarbon emulsion is replaced with a commonly used fluorocarbon emulsion on the market (purchased from Shanghai Baolijia Chemical Co., Ltd., model SX-988) in equal mass, and the other ingredients and preparation methods are the same.

[0106] Comparative Example 2

[0107] The difference between the present comparative example and Example 3 is that step S5 is removed, i.e. the modified rare earth oxide is replaced by rare earth oxide of the same mass, and other components and preparation methods are the same.

[0108] Test Example 1

[0109] The self-cleaning high-weather-resistant high-radiation refrigeration coatings prepared in Examples 1-3 and Comparative Examples 1-2 were subjected to performance testing.

[0110] Test method:

[0111] Stain resistance: The test was detected according to the provisions of Chapter 5 of GB / T 9780-2013, i.e. the coating layer stain resistance test method for exterior wall coatings Brushing B method (oven rapid) for two cycles of test.

[0112] Artificial weathering resistance: detected according to GB / T 9755-2014 standard.

[0113] Solar reflectance, hemispherical emissivity, and change rate of solar reflectance after pollution: detected according to the provisions of JG / T 235-2014 standard.

[0114] Surface temperature test of asbestos fiber cement board: the coatings of Example 1 and Comparative Example 1-2 were respectively coated on the asbestos fiber cement board of 300*300mm at a dosage of 0.30kg / m 2 , and then the surface temperature of each asbestos fiber cement board was tested after outdoor exposure on the roof in summer for 2h at an atmospheric temperature of 36℃.

[0115] The test results are shown in Table 1.

[0116] Table 1 Performance test results of the coatings of Examples 1-3 and Comparative Examples 1-2

[0117]

[0118]

[0119] From the above experimental results of Examples 1-3 and Comparative Examples 1-2, the following experimental conclusions can be drawn:

[0120] The coating of the embodiments 1-3 of the present application has higher solar reflectance and hemispherical emittance, the solar reflectance (TSR) can reach more than 95%, and has lower surface temperature, which can be lower than the atmospheric temperature, the solar radiation energy effectively absorbed is emitted to the cold outer space, and the all-weather refrigeration effect is achieved; secondly, from the data of the change rate of solar reflectance after contamination, the self-cleaning effect of the product is obvious; in addition, the artificial climate aging resistance is also far superior to the prior art product, and the weather resistance and stain resistance of the coating film are obvious, the change rate of solar reflectance after contamination is obviously reduced, the performance of solar reflectance and hemispherical emittance is obviously improved, and the surface temperature of the asbestos-free fiber cement board through actual application is further known, the refrigeration effect of the embodiments 1-3 of the present application is outstanding, and the surface temperature can be lower than the atmospheric temperature. The fluorocarbon emulsion and modified rare earth oxide with core-shell structure can significantly improve the stain resistance and weather resistance of the product, and can effectively reduce the surface temperature of the coating together with the heat insulation filler.

[0121] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than by the foregoing description, and it is intended that all changes which come within the meaning and range of equivalency of the claims are resolvable position the present application.

[0122] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A self-cleaning, highly weather-resistant, and high-radiation cooling coating, characterized in that, The self-cleaning, high-weather-resistant, high-radiation cooling coating comprises the following components in parts by weight: 16-20 parts of self-cleaning fluorocarbon emulsion Hydroxyethyl cellulose 0.1-0.2 parts 45-50 parts of non-electric refrigerant powder 6-10 parts of modified rare earth oxides 10-15 parts of covering polymer emulsion 1-10 parts of auxiliary agent Water 7.5-9 parts; The self-cleaning fluorocarbon emulsion is a self-cleaning fluorocarbon emulsion with a core-shell structure. In the core-shell structure, the core structure is obtained by polymerization of acrylate monomers; The shell structure is obtained by reacting fluorinated acrylate monomers, silane coupling agents and acrylate monomers; The modified rare earth oxide is a rare earth oxide modified with dodecyl fluoroheptyl methacrylate. The acrylate monomer is selected from one or more of n-butyl acrylate, hydroxypropyl methacrylate, methyl methacrylate, and hydroxypropyl acrylate. The preparation method of the self-cleaning, high-weather-resistant, high-radiation cooling coating includes the following steps: S1. Mix several acrylate monomers evenly to obtain a core prepolymer mixture; S2. Mix the fluorinated acrylate monomer, silane coupling agent and acrylate monomer evenly to obtain a shell prepolymer mixture; S3. Add the prepolymer mixture to the solvent, add the initiator and emulsifier, heat to react, and obtain the seed emulsion; S4. Add the shell prepolymer mixture and initiator to the seed emulsion, heat and react to obtain a self-cleaning fluorocarbon emulsion; S5. React rare earth oxides with silane coupling agents, then add dodecafluoroheptyl methacrylate and an initiator, and heat the reaction to obtain modified rare earth oxides; S6. Blend self-cleaning fluorocarbon emulsion, modified rare earth oxides and other components to obtain a self-cleaning, high weather-resistant, high-radiation refrigeration coating; The additives are selected from one or more of the following: dispersants, wetting agents, defoamers, pH adjusters, film-forming aids, antifreeze agents, thickeners, leveling agents, and preservatives and bactericides. The rare earth oxide is selected from one or more of lanthanum oxide, cerium oxide, and samarium oxide.

2. The self-cleaning, high-weather-resistant, high-radiation cooling coating according to claim 1, characterized in that, In step S3, the heating temperature is 80-95℃.

3. The self-cleaning, high-weather-resistant, high-radiation cooling coating according to claim 1, characterized in that, In step S4, the heating temperature is 75-85℃.

4. The self-cleaning, high-weather-resistant, high-radiation cooling coating according to claim 1, characterized in that, In step S5, the temperature of the heating reaction is 80-85℃.

5. The self-cleaning, high-weather-resistant, high-radiation cooling coating according to claim 1, characterized in that, The emulsifier is a mixture of sodium dodecyl sulfate and alkylphenol polyoxyethylene ether.

6. The self-cleaning, high-weather-resistant, high-radiation cooling coating according to claim 1, characterized in that, The initiator is selected from one or more of potassium persulfate and ammonium persulfate.

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