阅读说明：本技术 气雾剂型水性纳米相变储能隔热保温外墙涂料及其制备方法 (Aerosol-type aqueous nano phase-change energy-storage heat-insulation exterior wall coating and preparation method thereof ) 是由 金立新 汪火胜 于 2021-07-12 设计创作，主要内容包括：本发明提供一种气雾剂型水性纳米相变储能隔热保温外墙涂料及其制备方法。本发明的气雾剂型水性纳米相变储能隔热保温外墙涂料利用纳米相变胶囊在温度高于相变点时熔化吸收热量,在温度下降低于相变点时发生逆向结晶释放热量的特性,对建筑物体的温度在高温(夏天)和低温(冬天)状态下进行有效平衡调节,从而有效提高隔热保温效果。另外,利用水性纳米氟碳树脂的超耐沾污性和超强耐老化性可有效提高隔热保温涂层的持久性。本发明的气雾剂型水性纳米相变储能隔热保温外墙涂料的制备方法简单,采用二元包装结构的气雾罐,破解了常规水性聚合物树脂与抛射剂相容性差以及水性内容物腐蚀金属罐的难题,并避免了常规气雾剂产品易燃易爆的问题。(The invention provides an aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating and a preparation method thereof. The aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating disclosed by the invention utilizes the characteristic that the nano phase change capsules are melted and absorb heat when the temperature is higher than a phase change point and reversely crystallize to release heat when the temperature is reduced to be lower than the phase change point, so that the temperature of a building body is effectively balanced and regulated in high-temperature (summer) and low-temperature (winter) states, and the heat insulation and preservation effect is effectively improved. In addition, the durability of the heat insulation coating can be effectively improved by utilizing the super stain resistance and the super aging resistance of the aqueous nano fluorocarbon resin. The aerosol type aqueous nano phase change energy storage heat insulation external wall coating disclosed by the invention is simple in preparation method, adopts the aerosol can with a binary packaging structure, solves the problems of poor compatibility of the conventional aqueous polymer resin and a propellant and corrosion of an aqueous content on a metal can, and avoids the problems of flammability and explosiveness of the conventional aerosol product.)

1. An aerosol type aqueous nanometer phase change energy storage heat insulation exterior wall coating is characterized by comprising: 25-35 parts of nano aqueous fluorocarbon resin emulsion, 10-15 parts of nano phase change capsules, 5-10 parts of cenospheres, 10-20 parts of titanium dioxide, 0.2-0.5 part of preservative, 0.2-0.5 part of mildew preventive, 4-6 parts of opaque covering polymer, 1-2 parts of alcohol ester, 20-30 parts of filler, 2.9-6 parts of auxiliary agent, 0.1-0.2 part of PH regulator, 2-5 parts of propellant and 5-10 parts of deionized water.

2. The aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating of claim 1, wherein the solid content of the nano aqueous fluorocarbon resin emulsion is 45-55%, the particle size is less than 100nm, and the lowest film forming temperature is 25-30 ℃.

3. The aerosol type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating as claimed in claim 1, wherein the core material of the nano phase-change capsule is n-tetradecane, the capsule wall is urea resin, and the particle size is 90-110 nm.

4. The aerosol type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating as claimed in claim 1, wherein the hollow microspheres are made of ceramic with a particle size of 450-550 meshes; the titanium dioxide is rutile type titanium dioxide; the preservative is kasong; the product model of the mildew preventive is EPW, and the supplier is Suzhou hongjia environmental protection technology limited company; the opaque covering polymer is provided with a commodity model of UD8280, and the supplier is Kodeli chemical technology Co., Ltd, in Foshan; the alcohol ester is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate; the pH regulator is AMP 95; the propellant is nitrogen.

5. The aerosol-type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating of claim 1, wherein the filler comprises 10-15 parts by weight of calcium carbonate and 10-15 parts by weight of mica powder; the granularity of the calcium carbonate is 700-800 meshes, and the granularity of the mica powder is 750-850 meshes.

6. The aerosol-type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating as claimed in claim 1, wherein the auxiliary agent comprises 0.5-1 part by weight of dispersing agent, 0.2-0.5 part by weight of wetting agent, 1-2 parts by weight of propylene glycol, 0.2-0.5 part by weight of defoaming agent and 1-2 parts by weight of thickening agent.

7. The aerosol type aqueous nano phase change energy storage thermal insulation exterior wall coating as claimed in claim 6, wherein the dispersant is a copolymer high molecular dispersant; the wetting agent is aryl polyether, and the HLB value is 10-13; the thickening agent comprises a hydrophobic modified polyurethane thickening agent and a hydrophobic modified alkali swelling thickening agent; in the thickening agent, 0.5-1 part by weight of the hydrophobic modified polyurethane thickening agent and 0.5-1 part by weight of the hydrophobic modified alkali swelling thickening agent are added; the defoaming agent is polyether modified organic silicon defoaming agent.

8. A preparation method of an aerosol type aqueous nano phase change energy storage heat insulation exterior wall coating is characterized by comprising the following steps:

step S1, placing the nano water-based fluorocarbon resin emulsion and deionized water into a container, adding a dispersing agent, a wetting agent, propylene glycol, a defoaming agent and a hydrophobic modified polyurethane thickening agent in sequence under low-speed stirring, and then stirring at medium speed to obtain a first uniformly dispersed mixed solution;

step S2, slowly adding titanium dioxide and filler into the first mixed solution under low-speed stirring, and then stirring at high speed to obtain a second mixed solution which is uniformly dispersed;

step S3, slowly adding a preservative, a mildew preventive, an opaque covering polymer, alcohol ester and a nano aqueous fluorocarbon resin emulsion into the second mixed solution under low-speed stirring, uniformly stirring, slowly adding hollow microspheres and nano phase change capsules under low-speed stirring, uniformly stirring and mixing, adding a pH regulator and a hydrophobic modified alkali swelling thickener, and regulating to a proper viscosity to obtain the aqueous nano phase change energy storage heat insulation outer wall coating;

step S4, providing a binary package aerosol filling device, packaging an aerosol valve with a bag on an aerosol tank body by using the binary package aerosol filling device, and simultaneously filling propellants outside the bag of the aerosol valve and in the aerosol tank body; and then filtering the aqueous nano phase-change energy-storage heat-insulation external wall coating, filling the aqueous nano phase-change energy-storage heat-insulation external wall coating into a bag of an aerosol valve by using the binary packaging aerosol filling equipment, and finally installing an aerosol nozzle on the aerosol valve to prepare the aerosol type aqueous nano phase-change energy-storage heat-insulation external wall coating.

9. The preparation method of the aerosol-type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating material as claimed in claim 8, wherein in the step S1, the nano aqueous fluorocarbon resin emulsion is 12.5-17.5 parts by weight, the deionized water is 5-10 parts by weight, the dispersant is 0.5-1 part by weight, the wetting agent is 0.2-0.5 part by weight, the propylene glycol is 1-2 parts by weight, the defoamer is 0.2-0.5 part by weight, and the hydrophobic modified polyurethane thickener is 0.5-1 part by weight;

in the step S2, the titanium dioxide is 10-20 parts by weight, and the filler comprises 10-15 parts by weight of calcium carbonate and 10-15 parts by weight of mica powder;

in the step S3, the preservative is 0.2 to 0.5 weight part, the mildew preventive is 0.2 to 0.5 weight part, the opaque masking polymer is 4 to 6 weight parts, the alcohol ester is 1 to 2 weight parts, and the nano aqueous fluorocarbon resin emulsion is 12.5 to 17.5 weight parts; 5-10 parts of hollow microspheres and 10-15 parts of nano phase change capsules; 0.1-0.2 part of pH regulator and 0.5-1 part of hydrophobic modified polyurethane thickener;

in the step S4, the propellant is nitrogen, and the propellant is 2-5 parts by weight;

the step S1 is the same as the step S3 in parts by weight of the nano aqueous fluorocarbon resin emulsion.

10. The method for preparing the aerosol-type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating material as claimed in claim 8, wherein the low-speed stirring speed is 400-600r/min, the medium-speed stirring speed is 700-900r/min, and the high-speed stirring speed is 1800-2200 r/min;

in the step S2, the fineness of the second mixed solution is below 50 micrometers;

in the step S3, the suitable viscosity is 250-350 CST;

in step S4, the aerosol canister is made of tinplate.

Technical Field

The invention relates to the technical field of heat insulation coatings, in particular to an aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating and a preparation method thereof.

Background

With the rapid development of the building industry in China and the increasingly prominent energy crisis, the energy saving and consumption reduction of buildings are especially important to realize the established targets of carbon peak reaching 2030 and carbon neutralization 2060 in China, so that the green and environment-friendly building materials must be vigorously developed.

The energy consumption of buildings is large, and exceeds 20 percent in national energy consumption, wherein the vast majority of the energy consumption is the energy consumption of heating in winter and cooling in summer. Therefore, the research and development of the building heat insulation coating have great economic benefit, environmental benefit and social benefit. The coating with the heat insulation function used on the outer wall of the building not only can realize the original functions of decoration, protection, mildew prevention and the like of the coating, but also can ensure that the coating has the heat insulation function, can keep the indoor temperature constant, increases the indoor and outdoor temperature difference, reduces the energy consumption of the temperature difference in summer and reduces the heating cost in winter. Therefore, the realization of energy conservation and emission reduction of buildings is an important means for realizing carbon neutralization, and the development of heat-insulating and heat-preserving paint is an important part of an energy-saving and emission-reducing system in the building industry.

The exterior wall heat insulation coating popular in the market at present mainly takes a reflection-type heat insulation coating as a main material, the coating reflects infrared rays of sunlight to prevent heat conduction so as to achieve a heat insulation effect, and phenomena of poor heat insulation effect and poor heat insulation durability (for example, the phenomena of color deepening and aging and degradation of film forming substances caused by poor stain resistance of the coating so as to reduce the reflection heat insulation effect and further have poor heat insulation durability) generally exist. In addition, the local repair of the heat insulation coating of the building outer wall in the market is mainly carried out by brushing or air spraying repair by adopting a multi-coating system method, and the method has the problems of inconvenient construction, poor adhesion with a substrate, large material waste and the like. Therefore, how to improve the heat insulation effect and durability is an important problem to be researched and solved when the heat insulation coating is used.

Disclosure of Invention

The invention aims to provide an aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating which has the advantages of good heat insulation and preservation effect, lasting heat preservation, stable performance, good storage stability and good construction performance, and meets the requirements of environmental protection.

The invention also aims to provide a preparation method of the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating, which can prepare the heat insulation and preservation exterior wall coating with good heat insulation and preservation effect and lasting heat preservation; and avoids the problem that the conventional aerosol product is inflammable and explosive.

In order to achieve the purpose, the invention provides an aerosol type aqueous nano phase change energy storage heat insulation exterior wall coating, which comprises: 25-35 parts of nano aqueous fluorocarbon resin emulsion, 10-15 parts of nano phase change capsules, 5-10 parts of cenospheres, 10-20 parts of titanium dioxide, 0.2-0.5 part of preservative, 0.2-0.5 part of mildew preventive, 4-6 parts of opaque covering polymer, 1-2 parts of alcohol ester, 20-30 parts of filler, 2.9-6 parts of auxiliary agent, 0.1-0.2 part of PH regulator, 2-5 parts of propellant and 5-10 parts of deionized water.

The solid content of the nano aqueous fluorocarbon resin emulsion is 45-55%, the particle size is less than 100nm, and the lowest film forming temperature is 25-30 ℃.

The core material of the nano phase change capsule is n-tetradecane, the capsule wall is urea resin, and the particle size is 90-110 nanometers.

The hollow microspheres are made of ceramic and have the particle size of 450-550 meshes; the titanium dioxide is rutile type titanium dioxide; the preservative is kasong; the product model of the mildew preventive is EPW, and the supplier is Suzhou hongjia environmental protection technology limited company; the opaque covering polymer is provided with a commodity model of UD8280, and the supplier is Kodeli chemical technology Co., Ltd, in Foshan; the alcohol ester is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate; the pH regulator is AMP 95; the propellant is nitrogen.

The filler comprises 10-15 parts by weight of calcium carbonate and 10-15 parts by weight of mica powder; the granularity of the calcium carbonate is 700-800 meshes, and the granularity of the mica powder is 750-850 meshes.

The auxiliary agent comprises 0.5-1 part by weight of dispersant, 0.2-0.5 part by weight of wetting agent, 1-2 parts by weight of propylene glycol, 0.2-0.5 part by weight of defoaming agent and 1-2 parts by weight of thickening agent.

The dispersant is a copolymer high-molecular dispersant; the wetting agent is aryl polyether, and the HLB value is 10-13; the thickening agent comprises a hydrophobic modified polyurethane thickening agent and a hydrophobic modified alkali swelling thickening agent; in the thickening agent, 0.5-1 part by weight of the hydrophobic modified polyurethane thickening agent and 0.5-1 part by weight of the hydrophobic modified alkali swelling thickening agent are added; the defoaming agent is polyether modified organic silicon defoaming agent.

The invention also provides a preparation method of the aerosol type aqueous nano phase change energy storage heat insulation exterior wall coating, which comprises the following steps:

step S1, placing the nano water-based fluorocarbon resin emulsion and deionized water into a container, adding a dispersing agent, a wetting agent, propylene glycol, a defoaming agent and a hydrophobic modified polyurethane thickening agent in sequence under low-speed stirring, and then stirring at medium speed to obtain a first uniformly dispersed mixed solution;

step S2, slowly adding titanium dioxide and filler into the first mixed solution under low-speed stirring, and then stirring at high speed to obtain a second mixed solution which is uniformly dispersed;

step S3, slowly adding a preservative, a mildew preventive, an opaque covering polymer, alcohol ester and a nano aqueous fluorocarbon resin emulsion into the second mixed solution under low-speed stirring, uniformly stirring, slowly adding hollow microspheres and nano phase change capsules under low-speed stirring, uniformly stirring and mixing, adding a pH regulator and a hydrophobic modified alkali swelling thickener, and regulating to a proper viscosity to obtain the aqueous nano phase change energy storage heat insulation outer wall coating;

step S4, providing a binary package aerosol filling device, packaging an aerosol valve with a bag on an aerosol tank body by using the binary package aerosol filling device, and simultaneously filling propellants outside the bag of the aerosol valve and in the aerosol tank body; and then filtering the aqueous nano phase-change energy-storage heat-insulation external wall coating, filling the aqueous nano phase-change energy-storage heat-insulation external wall coating into a bag of an aerosol valve by using the binary packaging aerosol filling equipment, and finally installing an aerosol nozzle on the aerosol valve to prepare the aerosol type aqueous nano phase-change energy-storage heat-insulation external wall coating.

In the step S1, the nano aqueous fluorocarbon resin emulsion is 12.5 to 17.5 parts by weight, the deionized water is 5 to 10 parts by weight, the dispersant is 0.5 to 1 part by weight, the wetting agent is 0.2 to 0.5 part by weight, the propylene glycol is 1 to 2 parts by weight, the defoamer is 0.2 to 0.5 part by weight, and the hydrophobic modified polyurethane thickener is 0.5 to 1 part by weight;

in the step S2, the titanium dioxide is 10-20 parts by weight, and the filler comprises 10-15 parts by weight of calcium carbonate and 10-15 parts by weight of mica powder;

in the step S3, the preservative is 0.2 to 0.5 weight part, the mildew preventive is 0.2 to 0.5 weight part, the opaque masking polymer is 4 to 6 weight parts, the alcohol ester is 1 to 2 weight parts, and the nano aqueous fluorocarbon resin emulsion is 12.5 to 17.5 weight parts; 5-10 parts of hollow microspheres and 10-15 parts of nano phase change capsules; 0.1-0.2 part of pH regulator and 0.5-1 part of hydrophobic modified polyurethane thickener;

in the step S4, the propellant is nitrogen, and the propellant is 2-5 parts by weight;

the step S1 is the same as the step S3 in parts by weight of the nano aqueous fluorocarbon resin emulsion.

The low-speed stirring speed is 400-600r/min, the medium-speed stirring speed is 700-900r/min, and the high-speed stirring speed is 1800-2200 r/min;

in the step S2, the fineness of the second mixed solution is below 50 micrometers;

in the step S3, the suitable viscosity is 250-350 CST;

in step S4, the aerosol canister is made of tinplate.

The invention has the beneficial effects that: the invention provides an aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating and a preparation method thereof. The invention adopts nano aqueous fluorocarbon resin as a film forming substance, and adds nano phase change capsules, titanium dioxide, filler, auxiliary agent, opaque covering polymer, hollow microspheres, deionized water and other materials to prepare the aqueous nano phase change energy storage thermal insulation exterior wall coating with good thermal insulation effect and lasting thermal insulation. The aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating disclosed by the invention utilizes the characteristic that the nano phase change capsules are melted and absorb heat when the temperature is higher than a phase change point and reversely crystallize to release heat when the temperature is reduced to be lower than the phase change point, so that the temperature of a building body is effectively balanced and regulated in high-temperature (summer) and low-temperature (winter) states, and the heat insulation and preservation effect is effectively improved. In addition, the durability of the heat insulation coating can be effectively improved by utilizing the super stain resistance and the super aging resistance of the aqueous nano fluorocarbon resin. The aerosol type aqueous nano phase change energy storage heat insulation external wall coating disclosed by the invention is simple in preparation method, adopts the aerosol can with a binary packaging structure, solves the problems of poor compatibility of the conventional aqueous polymer resin and a propellant and corrosion of an aqueous content on a metal can, and avoids the problems of flammability and explosiveness of the conventional aerosol product.

Detailed Description

To further illustrate the technical means adopted by the present invention and the effects thereof, the following detailed description is given with reference to the preferred embodiments of the present invention.

The invention provides an aerosol type aqueous nano phase change energy storage heat insulation exterior wall coating, which comprises: 25-35 parts of nano aqueous fluorocarbon resin emulsion, 10-15 parts of nano phase change capsules, 5-10 parts of cenospheres, 10-20 parts of titanium dioxide, 0.2-0.5 part of preservative, 0.2-0.5 part of mildew preventive, 4-6 parts of opaque covering polymer, 1-2 parts of alcohol ester, 20-30 parts of filler, 2.9-6 parts of auxiliary agent, 0.1-0.2 part of PH regulator, 2-5 parts of propellant and 5-10 parts of deionized water.

Specifically, the solid content of the nano aqueous fluorocarbon resin emulsion is 45-55%, the particle size is less than 100nm, and the minimum film-forming temperature (MFT) is 25-30 ℃.

Preferably, the solid content of the nano aqueous fluorocarbon resin emulsion is 50%.

Specifically, the core material of the nano phase change capsule is n-tetradecane, the capsule wall is urea-formaldehyde resin, and the nano phase change capsule is prepared by adopting an in-situ polymerization method; the particle size is 90-110 nm, preferably 100nm, and the phase transition material has extremely high phase transition latent heat energy, good mechanical stability and thermal stability.

Specifically, the material of the hollow microsphere is ceramic, and the particle size is 450-550 meshes, and preferably 500 meshes.

Specifically, the titanium dioxide is rutile titanium dioxide, and the rutile titanium dioxide is prepared by adopting a chlorination method.

In particular, the preservative is cason.

Specifically, the mildew preventive is available under the trade model of EPW, and the supplier is Suzhou hongjia environmental protection technology limited.

Specifically, the opaque masking polymer is available under the trade designation UD8280 from the supplier of cody chemical technology ltd, of foshan.

Specifically, the alcohol ester is 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate.

Specifically, the filler comprises 10-15 parts by weight of calcium carbonate and 10-15 parts by weight of mica powder, and the particle size of the calcium carbonate is 700-800 meshes. The particle size of the mica powder is 750-850 meshes, and is preferably 800 meshes.

Specifically, the auxiliary agent comprises 0.5-1 part by weight of dispersing agent, 0.2-0.5 part by weight of wetting agent, 1-2 parts by weight of propylene glycol, 0.2-0.5 part by weight of defoaming agent and 1-2 parts by weight of thickening agent.

Specifically, the dispersant is a copolymer polymeric dispersant, preferably a polymeric ammonium polycarboxylate salt with good water resistance.

Specifically, the wetting agent is aromatic-based polyether, the HLB (Hydrophilile-Lipophile Balance Number) value is 10-13, APEO (alkylphenol polyoxyethylene ether compound) is not contained, and the standard of FDA (Food and Drug Administration) is met.

Preferably, the wetting agent is available under the trade designation aryl polyether wetting agent CF-10, available from the Dow chemical supplier.

Preferably, the defoaming agent is polyether modified organic silicon defoaming agent, the product model is DF2680, and the supplier is Defeng defoaming agent Co.

Specifically, the thickener comprises a hydrophobically modified polyurethane thickener and a hydrophobically modified alkali swelling thickener. In the thickener, 0.5-1 part by weight of the hydrophobic modified polyurethane thickener and 0.5-1 part by weight of the hydrophobic modified alkali swelling thickener are added.

The product model of the hydrophobic modified polyurethane thickener is RM-8W, and the supplier is Rohm and Haas; the commercial model of the hydrophobic modified alkali swelling thickener is TT-935, and the supplier is Rohm and Haas.

Specifically, the pH regulator is AMP95 (2-amino-2-methyl-1-propanol, with a structural formula of (CH)₃)₂C(NH₂)CH₂OH)。

Specifically, the propellant is nitrogen.

It should be noted that, the invention adopts nano aqueous fluorocarbon resin as film forming substance, adds nano phase change capsule, titanium dioxide, filler, auxiliary agent, opaque covering polymer, hollow micro-bead and deionized water, etc. to prepare a water-based nano phase change energy storage heat insulation exterior wall coating with good heat insulation effect and lasting heat insulation, the coating is filled into an aerosol can with a binary packaging structure to prepare the aerosol-type water-based nano phase change energy storage heat insulation exterior wall coating with stable performance and better construction performance, the main efficacy of the product is as follows:

1. the characteristic that the nano phase change capsules melt and absorb heat when the temperature is higher than a phase change point and reverse crystallization is carried out to release heat when the temperature is lower than the phase change point is utilized, so that the temperature of a building is effectively balanced and adjusted in high-temperature (summer) and low-temperature (winter) states, and the heat insulation effect is effectively improved. In addition, the durability of the heat insulation coating can be effectively improved by utilizing the super stain resistance and the super aging resistance of the aqueous nano fluorocarbon resin.

2. The aerosol can with the binary packaging structure is utilized, nitrogen is used as a propellant, the content of the aqueous nano phase-change energy-storage heat-insulation outer wall coating is filled into an independent bag in the aerosol can, the aqueous nano phase-change energy-storage heat-insulation outer wall coating forms a non-contact isolated body with the metal aerosol can and the propellant, and the coating content is atomized and sprayed out through an atomizing nozzle by the extrusion of the nitrogen when a valve is pressed, so that the problems of poor compatibility of conventional aqueous polymer resin and the propellant and corrosion of the aqueous content on the metal can are solved, and the problems of flammability and explosion of conventional aerosol products are avoided. The aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating prepared by the invention has good storage stability and constructability, is widely applied to surface coating application of building exterior walls, and is a high-efficiency, environment-friendly, low-carbon and energy-saving building material product.

Based on the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating, the invention also provides a preparation method of the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating, which comprises the following steps:

step S1, placing the nano water-based fluorocarbon resin emulsion and deionized water into a container, adding the dispersing agent, the wetting agent, the propylene glycol, the defoaming agent and the hydrophobic modified polyurethane thickener in sequence under low-speed stirring, and then stirring at medium speed to obtain a first mixed solution which is uniformly dispersed.

Specifically, the nano water-based fluorocarbon resin emulsion is 12.5-17.5 parts by weight, the deionized water is 5-10 parts by weight, the dispersing agent is 0.5-1 part by weight, the wetting agent is 0.2-0.5 part by weight, the propylene glycol is 1-2 parts by weight, the defoaming agent is 0.2-0.5 part by weight, and the hydrophobic modified polyurethane thickener is 0.5-1 part by weight.

Specifically, the speed of the low-speed stirring is 400-600r/min, preferably 500 r/min.

Specifically, the speed of the medium-speed stirring is 700-900r/min, preferably 800 r/min; the stirring time at medium speed is 4-6min, preferably 5min, so as to ensure that the first mixed solution is uniformly dispersed.

And step S2, slowly adding titanium dioxide and filler into the first mixed solution under low-speed stirring, and then stirring at high speed to obtain a second mixed solution which is uniformly dispersed.

Specifically, the titanium dioxide is 10-20 parts by weight, and the filler is 20-30 parts by weight.

Specifically, the high-speed stirring speed is 1800-2200r/min, preferably 2000 r/min; the high-speed stirring time is 20-30min, and the second mixed solution is ensured to be uniformly dispersed. The fineness of the second mixed solution is below 50 microns.

And step S3, slowly adding the preservative, the mildew preventive, the opaque covering polymer, the alcohol ester and the nano aqueous fluorocarbon resin emulsion into the second mixed solution under low-speed stirring, uniformly stirring, slowly adding the hollow microspheres and the nano phase-change capsules under low-speed stirring, uniformly stirring and mixing, then adding the pH regulator and the hydrophobic modified alkali swelling thickener, and regulating to proper viscosity to obtain the aqueous nano phase-change energy-storage heat-insulation exterior wall coating.

Specifically, the preservative is 0.2-0.5 part by weight, the mildew preventive is 0.2-0.5 part by weight, the opaque masking polymer is 4-6 parts by weight, the alcohol ester is 1-2 parts by weight, and the aqueous fluorocarbon resin emulsion is 12.5-17.5 parts by weight. 5-10 parts of hollow microspheres and 10-15 parts of nano phase change capsules; 0.1-0.2 part of PH regulator and 0.5-1 part of hydrophobic modified polyurethane thickener.

Preferably, in step S1 and step S3, the weight parts of the nano aqueous fluorocarbon resin emulsion are the same.

Specifically, the speed of the low-speed stirring is 400-600r/min, preferably 500 r/min.

Specifically, the suitable viscosity is 250-,

step S4, providing a binary package aerosol filling device, packaging an aerosol valve with a bag on an aerosol tank body by using the binary package aerosol filling device, and simultaneously filling propellants outside the bag of the aerosol valve and in the aerosol tank body; and then filtering the aqueous nano phase-change energy-storage heat-insulation external wall coating, filling the aqueous nano phase-change energy-storage heat-insulation external wall coating into a bag of an aerosol valve by using the binary packaging aerosol filling equipment, and finally installing an aerosol nozzle on the aerosol valve to prepare the aerosol type aqueous nano phase-change energy-storage heat-insulation external wall coating.

Specifically, the propellant is nitrogen, and the propellant is 2-5 parts by weight. The water-based nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating is filtered by a filter screen with 350 meshes, preferably 325 meshes. The aerosol can is made of tinplate.

The following are preferred embodiments of the invention:

the first embodiment:

the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating of the first embodiment of the invention adopts the following raw materials in parts by weight: 28 parts of nano aqueous fluorocarbon resin emulsion, 15 parts of nano phase change capsules, 10 parts of 500-mesh ceramic cenospheres, 10 parts of rutile titanium dioxide, 0.3 part of kasong, 0.4 part of mildew preventive EPW, 5 parts of opaque covering polymer UD8280, 1.5 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 10 parts of 800-mesh mica powder, 10 parts of 800-mesh calcium carbonate, 0.8 part of copolymer macromolecular dispersant, 0.3 part of aromatic hydrocarbon wetting agent CF-10, 2 parts of propylene glycol, 0.3 part of polyether modified organic silicon type defoaming agent, 0.7 part of hydrophobic modified polyurethane thickener RM-8W, 0.7 part of hydrophobic modified alkali swelling thickener TT-935, 0.15 part of AMP95, 2 parts of nitrogen gas, And 6.85 parts by weight of deionized water.

Correspondingly, the preparation method of the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating of the first embodiment of the invention comprises the following steps:

and step S1, putting 50 percent (namely 14 weight parts) of the nano aqueous fluorocarbon resin emulsion and deionized water into a container according to the proportion, sequentially adding the dispersing agent, the wetting agent, the propylene glycol, the defoaming agent and the hydrophobic modified polyurethane thickener according to the proportion under the low-speed stirring of 500r/min, and then stirring at the medium speed of 800r/min for 5min to obtain a first uniformly dispersed mixed solution.

And step S2, slowly adding titanium dioxide and filler into the first mixed solution according to the proportion under the low-speed stirring of 500r/min, and then carrying out high-speed stirring of 2000r/min for 20-30min to obtain a second mixed solution with uniform dispersion and fineness of below 50 microns.

And step S3, slowly adding the preservative, the mildew preventive, the opaque covering polymer, the alcohol ester and the rest nano aqueous fluorocarbon resin emulsion (14 parts by weight) into the second mixed solution according to the proportion under the low-speed stirring of 500r/min, uniformly stirring, slowly adding the hollow microspheres and the nano phase change capsules under the low-speed stirring of 500r/min, uniformly stirring and mixing, then adding the PH regulator and the hydrophobic modified alkali swelling thickener, and regulating the viscosity to 300CST to obtain the aqueous nano phase change energy storage heat insulation outer wall coating.

Step S4, providing a binary package aerosol filling device, and packaging an aerosol valve with a bag (500 ml in volume) in a tinplate aerosol can (with the size of 500ml) by using the binary package aerosol filling device ) On the body, 8g of nitrogen is filled outside the bag of the aerial fog valve and in the aerial fog tank body; and (4) filtering 400g of the aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating prepared in the step (S3) by using a 325-mesh filter screen, filling the aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating into a bag of an aerosol valve by using the binary packaging aerosol filling equipment, and finally installing an aerosol nozzle on the aerosol valve to prepare the aerosol-type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating.

Second embodiment:

the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating of the second embodiment of the invention adopts the following raw materials in parts by weight: 30 parts of nano aqueous fluorocarbon resin emulsion, 13 parts of nano phase change capsules, 7 parts of 500-mesh ceramic cenospheres, 10 parts of rutile titanium dioxide, 0.3 part of kasong, 0.4 part of mildew preventive EPW, 5 parts of opaque covering polymer UD8280, 1.5 parts of 2,2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 10 parts of 800-mesh mica powder, 10 parts of 800-mesh calcium carbonate, 0.8 part of copolymer macromolecular dispersant, 0.3 part of aromatic hydrocarbon wetting agent CF-10, 2 parts of propylene glycol, 0.3 part of polyether modified organic silicon type defoaming agent, 0.7 part of hydrophobic modified polyurethane thickener RM-8W, 0.7 part of hydrophobic modified alkali swelling thickener TT-935, 0.15 part of AMP95, 2 parts of nitrogen gas, And 9.85 parts by weight of deionized water.

Correspondingly, the preparation method of the aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating of the second embodiment of the invention comprises the following steps:

and step S1, putting 50 percent (namely 15 weight parts) of the nano aqueous fluorocarbon resin emulsion and deionized water into a container according to the proportion, sequentially adding the dispersing agent, the wetting agent, the propylene glycol, the defoaming agent and the hydrophobic modified polyurethane thickener according to the proportion under the low-speed stirring of 500r/min, and then stirring at the medium speed of 800r/min for 5min to obtain a first uniformly dispersed mixed solution.

And step S2, slowly adding titanium dioxide and filler into the first mixed solution according to the proportion under the low-speed stirring of 500r/min, and then carrying out high-speed stirring of 2000r/min for 20-30min to obtain a second mixed solution with uniform dispersion and fineness of below 50 microns.

And step S3, slowly adding the preservative, the mildew preventive, the opaque covering polymer, the alcohol ester and the rest nano aqueous fluorocarbon resin emulsion (15 parts by weight) into the second mixed solution according to the proportion under the low-speed stirring of 500r/min, uniformly stirring, slowly adding the hollow microspheres and the nano phase change capsules under the low-speed stirring of 500r/min, uniformly stirring and mixing, then adding the PH regulator and the hydrophobic modified alkali swelling thickener, and regulating the viscosity to 300CST to obtain the aqueous nano phase change energy storage heat insulation outer wall coating.

Step S4, providing a binary package aerosol filling device, and packaging an aerosol valve with a bag (400 ml in volume) in a tinplate aerosol can (with the size of 400ml) by using the binary package aerosol filling device ) BodyMeanwhile, 6g of nitrogen is filled outside the bag of the aerosol valve and in the aerosol tank; and (5) filtering 300g of the aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating prepared in the step S3 by using a 325-mesh filter screen, filling the aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating into a bag of an aerosol valve by using the binary packaging aerosol filling equipment, and finally installing an aerosol nozzle on the aerosol valve to prepare the aerosol-type aqueous nano phase-change energy-storage heat-insulation and heat-preservation exterior wall coating.

In conclusion, the invention provides an aerosol type aqueous nano phase change energy storage heat insulation exterior wall coating and a preparation method thereof. The invention adopts nano aqueous fluorocarbon resin as a film forming substance, and adds nano phase change capsules, titanium dioxide, filler, auxiliary agent, opaque covering polymer, hollow microspheres, deionized water and other materials to prepare the aqueous nano phase change energy storage thermal insulation exterior wall coating with good thermal insulation effect and lasting thermal insulation. The aerosol type aqueous nano phase change energy storage heat insulation and preservation exterior wall coating disclosed by the invention utilizes the characteristic that the nano phase change capsules are melted and absorb heat when the temperature is higher than a phase change point and reversely crystallize to release heat when the temperature is reduced to be lower than the phase change point, so that the temperature of a building body is effectively balanced and regulated in high-temperature (summer) and low-temperature (winter) states, and the heat insulation and preservation effect is effectively improved. In addition, the durability of the heat insulation coating can be effectively improved by utilizing the super stain resistance and the super aging resistance of the aqueous nano fluorocarbon resin. The aerosol type aqueous nano phase change energy storage heat insulation external wall coating disclosed by the invention is simple in preparation method, adopts the aerosol can with a binary packaging structure, solves the problems of poor compatibility of the conventional aqueous polymer resin and a propellant and corrosion of an aqueous content on a metal can, and avoids the problems of flammability and explosiveness of the conventional aerosol product.

As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.