CN106752526B - Water-based light-reflection industrial heat-insulating coating and preparation method thereof - Google Patents

Abstract

The invention relates to an industrial coating, a water-based industrial thermal insulation coating with light reflection heat insulation and anti-corrosion effects and a preparation method thereof. By weight percentage of coating, 25%-50% polymer emulsion, 5%-30% light reflective filler, 1%-5% nano-filler, 5%-10% thermal insulation filler, 5%-10% anti-corrosion filler, 5%-10% %～8% common filler, 0%～10% curing agent, 1%～5% dispersant, 0.1%～4% film forming aid, 0.1%～2% thickener, 0%～1% defoamer , 0.01%-0.5% PH regulator, 0.1%-2% wetting agent, 0.5%-1% antifreeze, and the balance is deionized water. The coating of the present invention has the effects of sunlight reflection, thermal barrier and anti-corrosion at the same time, can be used in the fields of storage tanks, pipelines, outdoor equipment, containers, etc., and has the characteristics of safety, non-toxicity, environmental protection and pollution-free. Excellent weather resistance, stain resistance, salt spray resistance and scrub resistance.

Description

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

technical field

The invention relates to an industrial coating, a water-based industrial thermal insulation coating with light reflection heat insulation and anti-corrosion effects and a preparation method thereof.

Background technique

Coatings, as the most commonly used finishing materials, are gradually developing from simple protection, decoration and other uses to broader functional applications in the field. Traditional industrial coatings are generally mainly applied to the surface of steel structure materials such as storage tanks, pipelines, containers, outdoor equipment, load-bearing devices, etc., to play the role of anti-corrosion and decoration. Since the 13th Five-Year Plan, "reducing the discharge of three wastes", "improving intrinsic safety" and "saving energy consumption" have become major issues to be solved urgently and hot topics of concern in today's industrial field. It will have high economic value to develop industrial coatings that integrate thermal insulation, anti-corrosion, self-cleaning, UV resistance and other functions.

The storage tank is the main construction object of industrial coatings. Due to its long-term exposure to the summer sun, the high temperature environment causes the surface and internal temperature of the storage tank to rise rapidly. Most of the heat is concentrated in the surface layer of the oil interface, which accelerates the evaporation of oil products. , resulting in oil "small breathing" loss and overpressure danger.

The traditional cooling methods include the use of thermal insulation layers, water spray cooling and other methods. The above two methods have certain limitations. In recent years, the thermal insulation and cooling of storage tanks are mainly realized by coating thermal insulation coatings. Aluminum powder paint is the earliest thermal insulation coating product put into use. The aluminum powder paint film has a smooth mirror effect, can reflect most of the sunlight, and is cheap. It has become the preferred product of manufacturers for a period of time. However, due to the poor corrosion resistance and weather resistance of aluminum powder paint, it often loses its effect after one year of painting, and needs to be repainted. The inconvenience caused by repeated construction and the unsatisfactory application effect make these products gradually eliminated. Solvent-based light reflective composite coating system has become a substitute for aluminum powder paint. This product has the advantages of good cooling effect and good weather resistance, but its price is relatively expensive and the construction is relatively complicated. The construction period is long and the construction safety is poor. With the improvement of my country's environmental protection requirements for coating materials and the general trend of water-based industrial coatings in my country, solvent-based products will gradually be eliminated in the future market.

Chinese Patent No. 201210510347.1 discloses an anti-corrosion, heat-insulating and heat-reflecting coating for storage tanks, and at the same time, a preparation method is given. The coating has a high reflection efficiency of 85% to sunlight and strong resistance to salt spray. However, it uses a large amount of organic solvent as a carrier and does not have the characteristics of environmental friendliness. Chinese Patent No. 200510028388.7 discloses a method for preparing a solar reflective paint for buildings. The formula uses pure acrylic resin and titanium dioxide, barium sulfate, kaolinite powder, sepiolite, etc. as the main raw materials, and the prepared paint has a reflectivity of 90%. Chinese patent 201410336222.0 provides a method for preparing an infrared energy-saving coating, which uses alumina micropowder, ferromanganese spinel powder, iron-chromium spinel powder, vanadium pentoxide and other raw materials as functional fillers to prepare a coating with high infrared radiation capability, At room temperature, the full-wavelength integrated emissivity reaches 0.95. The common disadvantage of the above two reflective coatings is that they only have the ability to reflect and radiate infrared light, but do not have the effect of blocking heat conduction, and the scope of application is narrow. Chinese Patent No. 200810021667.4 discloses a water-based elastic thermal insulation coating, mentioning the application on storage tanks and pipelines, but it does not give data on corrosion resistance and weather resistance. Therefore, it is of great significance to develop a water-based light-reflecting industrial energy-saving paint with both thermal insulation and anti-corrosion effects, as well as safe and convenient construction.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an environment-friendly water-based light-reflecting industrial thermal insulation coating with both thermal insulation and anti-corrosion effects and a preparation method thereof.

To achieve the above object, the technical scheme adopted in the present invention is:

A water-based industrial thermal insulation coating, by weight percentage, 25%-50% polymer emulsion, 5%-30% light reflective filler, 1%-5% nano-filler, 5%-10% thermal insulation filler, 5%- 10% anti-corrosion filler, 5%-8% ordinary filler, 0%-10% curing agent, 1%-5% dispersant, 0.1%-4% film-forming aid, 0.1%-2% thickener, 0% ～1% defoamer, 0.01%～0.5% PH adjuster, 0.1%～2% wetting agent, 0.5%-1% antifreeze, the balance is deionized water.

The polymer emulsion is one of polyacrylic acid emulsion, acrylic acid-styrene copolymer emulsion, fluorocarbon emulsion, polyurethane emulsion, ethylene-vinyl acetate copolymer emulsion, organopolysiloxane emulsion, hydroxyl acrylic emulsion, epoxy emulsion, or several;

Among them, the organopolysiloxane emulsion is a copolymer emulsion of various siloxanes with a highly cross-linked network structure, and the structural units mainly include methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, methyl phenyldichlorosilane.

Hydroxy acrylic emulsion is a copolymer of acrylic acid, methyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate and other monomers.

Fluorocarbon emulsions are emulsions of fluoroolefins or fluoroolefins copolymerized with other monomers. According to the monomer composition, it can be divided into polytetrafluoroethylene fluorocarbon emulsion, polyvinylidene fluoride emulsion and chlorotrifluoroethylene-vinyl ether copolymer emulsion.

The light-reflecting filler is one or more of titanium dioxide, zirconium oxide, magnesium oxide, zinc oxide, aluminum oxide, and aluminum powder;

The nano-filler is one or more of nano-silicon dioxide, nano-tin antimony oxide and nano-indium tin oxide;

The insulating filler is one or more of aerogel powder, hollow microspheres, ceramic microspheres, sepiolite, closed-cell expanded perlite, vermiculite, and potassium silicate whiskers; It is one or more of hollow glass microspheres, hollow corundum microspheres and hollow floating beads;

The common filler is a mixture of two or more of heavy calcium carbonate, kaolin, and mica powder;

The anti-corrosion filler is one or more of zinc powder, iron oxide, zinc phosphate, barium sulfate and graphene;

The curing agent is isocyanate or polyamine; wherein, polyamine is polyamine including aliphatic polyamine or aromatic polyamine; aliphatic polyamine includes ethylenediamine, diethylenetriamine, hexamethylenediamine, etc.; aromatic polyamine Polyamine 4,4'-dimethyldiphenylmethane, m-phenylenediamine, etc.

The dispersant is a nonionic dispersant;

The film-forming aid is one or more of alcohol lipid-12, ethylene glycol butyl ether, propylene glycol phenyl ether, propylene glycol butyl ether, and 2-amino-2 methyl-1 propanol;

The thickener is one or more of polyurethane, polyacrylate, polyvinyl alcohol, and cellulose;

The defoamer is natural mineral oil, polysiloxane, polydimethylsiloxane or an aqueous solution of siloxane-polyester copolymer;

Described pH regulator is ammonia water and/or 5% sodium hydroxide aqueous solution.

Described wetting agent is sodium hexametaphosphate solution and/or polyoxyethyl nonylphenol;

The antifreeze agent is ethylene glycol and/or propylene glycol.

Among the above-mentioned components, the preferred polymer emulsion is one or more of polyacrylic acid emulsion, acrylic acid-styrene copolymer emulsion, ethylene-vinyl acetate copolymer emulsion, polyurethane emulsion, fluorocarbon emulsion, and hydroxyacrylic acid emulsion;

The preferred light-reflecting filler is one or more of titanium dioxide, zinc oxide, and aluminum oxide; further preferred is one of zinc oxide and aluminum oxide.

The preferred insulating filler is one or more of aerogel powder, hollow microspheres and ceramic microspheres;

Preferred nonionic dispersants are polyethylene glycol, polyethylene oxide, polypropylene oxide, polyvinyl alcohol, ethylene oxide-propylene oxide diblock polymers, ethylene oxide-propylene oxide - A mixture of two or more of ethylene oxide triblock polymers and polyethylene oxide-polyacrylate block polymers.

The rutile phase content in the titanium dioxide is not less than 99%, the pH of the aqueous suspension is 6.5-8.5, and the particle size is 200-300 nm;

The particle size of nano-silicon dioxide in the nano-filler is 100-300 nm; the particle size of nano-tin antimony oxide and nano-indium tin oxide is 50-200 nm;

The thermal conductivity of the aerogel powder is 0.015-0.025w/(m·k), the density is 100-300kg/m ³ , the specific surface area is 150-500m ² /g, and the particle size is 1-10 μm;

The hollow glass microspheres have a density of 0.1-0.3 g/cm ³ , a compressive strength of not less than 20 MPa, and a particle size of 10-70 μm.

The main component α-Al ₂ O ₃ of the hollow corundum microsphere is not less than 99%, the particle size is 0.7-3 μm, and the wall thickness is 0.1-0.3 μm.

The compressive strength of ceramic microspheres is not less than 400MPa, the density is 2-2.6g/cm ³ , and the average particle size is 3-5 microns.

The floating bead density is 0.3-0.5 g/cm ³ , and the particle size is 80-120 μm.

The mica powder is sericite; the particle size is 10-20 μm;

Described graphene is graphene prepared by redox method, and the number of layers is 5-20 layers;

The zinc powder is 200 mesh scaly zinc powder, the iron oxide is 500 mesh mica iron oxide, and the barium sulfate is 1200 mesh precipitated barium sulfate.

The fibrous α crystal form in sepiolite is not less than 90%, and the density is 2.5-3 g/cm ³ .

The particle size of expanded perlite is 10-30 μm, and the volume expansion rate is 5-20 times.

The particle size of ground calcium carbonate is 3-10 μm, the particle size of barium sulfate is 5-10 μm, and the particle size of kaolin is 5-10 μm;

A preparation method of a water-based industrial thermal insulation coating, comprising the following steps:

(1) Slurry mixing: add water, dispersant, antifreeze and some defoamer to the paint dispersion tank according to the above formula, and add light reflective filler, heat insulation filler, anticorrosion filler and common filler after mixing evenly. Disperse at 1000-2000 rpm for 20-40 minutes to obtain slurry;

(2) Slurry grinding: use a horizontal sand mill to grind the above energy-saving slurry, mix the slurry prepared in the above step (1) with the grinding medium in a volume ratio of 1:0.8 to 1.2, and adjust the rotation speed to After grinding at 300-5000 rpm for 30-60 minutes, filter out the material;

(3) Preparation of water-based industrial thermal insulation coating: add polymer emulsion, thickener, film-forming aid, wetting agent, PH modifier and remaining defoamer into the reactor according to the above proportions, respectively, at 1000-2000 rpm Disperse for 10-30 minutes at a rotational speed per minute until the system is uniform, slowly add nano-filler, the ground slurry and curing agent in the above step (2), and continue to disperse for 10-30 minutes to obtain a water-based industrial thermal insulation coating.

The advantages of the present invention:

By using a reasonable composite dispersant system, proper feeding sequence and grinding process, the present invention effectively fuses and compounds various fillers with different polarities and different surface properties, and finally forms a coating system with good compatibility. In the system, nano-scale fillers, meso-scale infrared reflective fillers and large-scale anti-corrosion fillers with a specific lamellar structure fill the gaps of polymer materials in an orderly manner in a reasonable proportion. It not only ensures high light reflection function and thermal barrier effect, but also improves the salt spray resistance of the coating, and at the same time ensures the strong toughness of the coating film, so that the coating of the present invention has both good thermal insulation and anti-corrosion functions. It can avoid the disadvantage of separate construction of conventional thermal insulation and anti-corrosion coatings, reduce construction difficulty and improve application efficiency.

Furthermore, the coating of the present invention has the functions of thermal insulation and anti-corrosion at the same time, and can be fully applied to objects such as storage tanks, pipelines, containers, outdoor equipment and the like. With extremely low VOCs, high solar reflectance, near-infrared reflectance and hemispheric emissivity, it can effectively inhibit the absorption of most solar energy in hot summer and achieve cooling effect by radiating heat to the outside. In addition, The coating of the invention has good weather resistance, stain resistance and scrub resistance, and can satisfy the requirement of ensuring excellent use effect in a long period of time.

Detailed ways

The present invention will be further described in detail below through specific embodiments. The following examples are only used to illustrate the present invention, but are not intended to limit the scope of implementation of the present invention. All technical solutions obtained by adopting equivalent replacement or equivalent transformation methods fall within the protection scope of the present invention.

The coating of the present invention has the effects of sunlight reflection, thermal barrier and anti-corrosion at the same time, can be used in the fields of storage tanks, pipelines, outdoor equipment, containers, etc., and has the characteristics of safety, non-toxicity, environmental protection and pollution-free. Excellent weather resistance, stain resistance, salt spray resistance and scrub resistance.

The invention also discloses a preparation method of the coating, which is simple in preparation process, extremely low in cost, good in product stability, and easy to realize industrialized production.

Example 1

The formula composition of water-based industrial thermal insulation coatings is shown in the following table:

Among them, the thermal conductivity of the aerogel powder in the above table is 0.02w/(m·k), the density is 240kg/m ³ , the specific surface area is 220m ² /g, the particle size is 3-8 μm, and the average particle size of silica is 150 nm, and the average particle size of titanium dioxide is 300 nm.

Preparation of paint:

(1) Slurry mixing: add deionized water, dispersant, antifreeze and a part of defoamer to the paint dispersion tank according to the above formula, and add light reflection filler, heat insulation filler, anticorrosion filler and common filler after mixing evenly , dispersed at 1000 rpm for 30 minutes to obtain a slurry;

(2) Slurry grinding: use a horizontal sand mill to grind the above energy-saving slurry, and mix the energy-saving slurry prepared in the above step (1) with the grinding medium (zirconia beads) in a volume ratio of 1:1.2 , adjust the speed to 2000 rpm, grind for 30 minutes, filter and discharge;

(3) Preparation of water-based industrial thermal insulation coating: add the polyacrylic acid emulsion, thickener, alcohol fat-12, wetting agent, ammonia water and the remaining part of the defoamer to the reactor according to the above proportions, and at a speed of 1000 rpm Disperse for 30 minutes until the system is uniform, slowly add nano-filler, and then add the ground slurry in the above step (2), and continue to disperse for 20 minutes to obtain a water-based industrial thermal insulation coating.

Example 2

The formula composition of water-based industrial thermal insulation coatings is shown in the following table:

In the above table, the particle size of tin and antimony oxide is 70 nm, and the average particle size of titanium dioxide is 300 nm.

Preparation of paint:

(1) Slurry mixing: add water, dispersant, antifreeze and a part of defoamer to the paint dispersion tank according to the above formula, add light reflective filler, anti-corrosion filler and common filler after mixing evenly, at 1200 rpm Disperse at rotating speed for 30 minutes to obtain slurry;

(2) Slurry grinding: use a horizontal sand mill to grind the above energy-saving slurry, mix the energy-saving slurry prepared in the above step (1) with the grinding medium in a volume ratio of 1:1.1, and adjust the rotation speed to 2000 After 60 minutes of grinding, the material is filtered and discharged;

(3) Preparation of water-based industrial thermal insulation coating: add hydroxyacrylic acid emulsion, thickener, alcohol fat-12, wetting agent, ammonia water and the remaining part of defoamer to the reactor according to the above proportions, and at 1000 rpm Disperse for 30 minutes until the system is uniform, slowly add nano-fillers and heat-insulating fillers, then add the ground slurry in the above step (2), and continue to disperse for 20 minutes to obtain a water-based industrial thermal insulation coating.

Example 3

The formula composition of water-based industrial thermal insulation coatings is shown in the following table:

The thermal conductivity of the aerogel powder in the above table is 0.02w/(m·k), the density is 240kg/m ³ , the specific surface area is 220m ² /g, the particle size is 3-8 μm, and the particle size of tin and antimony oxide is The average particle size of 70 nm titanium dioxide is 300 nm.

Preparation of paint:

(1) Slurry preparation: add water, dispersant, antifreeze and a part of defoaming agent to the paint dispersion tank according to the above formula, add light reflective filler, heat insulation filler, anticorrosion filler and common filler after mixing evenly. Disperse at 1200 rpm for 30 minutes to obtain slurry;

(2) Slurry grinding: use a horizontal sand mill to grind the above energy-saving slurry, mix the energy-saving slurry prepared in the above step (1) with the grinding medium in a volume ratio of 1:1.1, and adjust the rotation speed to 2000 After grinding for 40 minutes at rpm, the material is filtered and discharged;

(3) Preparation of water-based industrial thermal insulation coating: add hydroxyacrylic acid, thickener, ethylene glycol butyl ether, wetting agent, ammonia water and the remaining part of the defoamer into the reactor according to the above proportions, and at 1000 rpm Disperse for 20 minutes until the system is uniform, slowly add nano-filler, then add the ground slurry and curing agent in the above step (2), and continue to disperse for 20 minutes to obtain a water-based industrial thermal insulation coating.

Example 4

The formula composition of water-based industrial thermal insulation coatings is shown in the following table:

The particle size of indium tin oxide in the above table is 100 nm, the average particle size of titanium dioxide is 300 nm, and the average number of sheets of graphene is 7-8 layers.

Preparation of paint:

(1) Slurry preparation: add water, dispersant, antifreeze and a part of defoaming agent to the paint dispersion tank according to the above formula, add light reflective filler, heat insulation filler and common filler after mixing evenly, at 1200 rpm/ Disperse for 30 minutes at minute speed to obtain slurry;

(2) Slurry grinding: use a horizontal sand mill to grind the above energy-saving slurry, mix the energy-saving slurry prepared in the above step (1) with the grinding medium in a volume ratio of 1:1.1, and adjust the rotation speed to 2000 After grinding for 40 minutes at rpm, the material is filtered and discharged;

(3) Preparation of water-based industrial thermal insulation coating: add hydroxyacrylic acid, thickener, alcohol fat-12, wetting agent, ammonia water and the remaining part of the defoamer into the reactor according to the above ratios, and disperse at 1000 rpm. 20 minutes until the system is uniform, disperse the anti-corrosion filler with a dispersant, and slowly add it into the system after sonicating for 30 minutes, then add the slurry and curing agent after grinding in the above step (2), and continue to disperse for 20 minutes. Thermal Insulation Coatings.

Example 5

The formula composition of water-based industrial thermal insulation coatings is shown in the following table:

The thermal conductivity of the aerogel powder in the above table is 0.02w/(m·k), the density is 240kg/m ³ , the specific surface area is 220m ² /g, the particle size is 3-8μm, and the average particle size of titanium dioxide is 300nm .

Preparation of paint:

(1) Slurry preparation: add water, dispersant, antifreeze and a part of defoaming agent to the paint dispersion tank according to the above formula, add light reflective filler, heat insulation filler and common filler after mixing evenly, at 1200 rpm/ Disperse for 30 minutes at minute speed to obtain slurry;

(2) Slurry grinding: use a horizontal sand mill to grind the above energy-saving slurry, mix the energy-saving slurry prepared in the above step (1) with the grinding medium in a volume ratio of 1:1.1, and adjust the rotation speed to 2000 After grinding for 40 minutes at rpm, the material is filtered and discharged;

(3) Preparation of water-based industrial thermal insulation coating: add hydroxyacrylic acid, thickener, alcohol fat-12, wetting agent, ammonia water and the remaining part of the defoamer into the reactor according to the above ratios, and disperse at 1000 rpm. 20 minutes until the system is uniform, disperse the anti-corrosion filler with a dispersant, and slowly add it into the system after sonicating for 30 minutes, then add the slurry and curing agent after grinding in the above step (2), and continue to disperse for 20 minutes. Thermal Insulation Coatings.

Comparative Example 1 is a commercially available water-based energy-saving industrial coating.

Comparative Example 2 is a commercially available solvent-based energy-saving paint.

performance test

The above examples were painted to prepare standard test panels, and the scrub resistance of the coatings was tested according to GB/T9266, the stain resistance was tested according to GB/T9780, and the artificial weathering resistance was tested according to GB/T 9755-1997. According to JC/T 235-2014, the coatings are tested for solar reflectance, hemispherical emissivity and thermal insulation temperature difference.

Table 1 Test results of water-based industrial energy-saving coatings

It can be seen from the above Table 1 that the water-based industrial thermal insulation coating of the embodiment of the present invention has higher solar reflectance, infrared emissivity and infrared reflectance in terms of heat insulation and cooling, which can effectively suppress the temperature rise of the coated object in summer and reduce the storage material. Volatile loss, improve the intrinsic safety of stored materials, and reduce water spraying; in addition, the coating has good weather resistance, stain resistance, and scrub resistance. Examples 1-3 have extremely high solar reflectance, infrared reflectance and hemispherical emissivity, and the corresponding cooling effect is extremely excellent. In Example 4, due to the addition of graphene material, a part of the reflectivity for sunlight is sacrificed, but it relies on higher hemispheric emissivity and infrared reflection ratio, the heat insulation and cooling effect is still very ideal, and has better salt resistance. Fog and aging resistance. The light-reflecting filler of Example 5 only adds titanium dioxide, does not use the preferred zinc oxide, does not use the preferred graphene and mica iron oxide for the anti-corrosion filler, and does not add nano-filler formula. The ability to reflect and radiate infrared light is slightly inferior to that of the preferred formula. And the salt spray resistance and aging resistance are also slightly inferior to the preferred formulation, but still higher than that of Comparative Example 1, which is also a water-based paint.

Comparative Example 1 has no salt spray resistance and poor weather resistance; Comparative Example 2 has the ability to reflect sunlight, but because it is a solvent-based product, the VOCs are too high, and it is easy to cause danger during construction.

Claims (2)

1. A water-based industrial heat-insulating coating with light reflection heat insulation and corrosion prevention effects is characterized in that:

the formula comprises the following components: 40g of high-molecular emulsion, 35g of light-reflecting filler, 3g of anticorrosive filler, 2g of heat-insulating filler, 2g of common filler, 6g of curing agent, 0.5g of nano filler, 4g of dispersing agent, 3g of film-forming assistant, 0.5g of thickening agent, 0.2g of defoaming agent, 0.5g of wetting agent, 2g of antifreezing agent and 25g of deionized water; the light reflection filler is 30g of titanium dioxide and 5g of zinc oxide; the dispersing agent is 1g of ethylene oxide-propylene oxide-ethylene oxide triblock polymer and 3g of polyethylene oxide-polyacrylate block polymer;

the polymer emulsion is hydroxyl acrylic emulsion; the anticorrosive filler is mica iron oxide; the heat insulation filler is aerogel powder; the common filler is mica powder; the curing agent is isocyanate; the nano filler is tin antimony oxide; the film-forming auxiliary agent is ethylene glycol butyl ether; the thickening agent is polyurethane; the defoaming agent is polydimethylsiloxane; the wetting agent is sodium hexametaphosphate; the antifreezing agent is propylene glycol;

the aerogel powder has the thermal conductivity coefficient of 0.02W/(m.K) and the density of 240kg/m³A specific surface area of 220m²(ii)/g, the particle size is 3-8 μm; the grain size of the tin antimony oxide is 70nm, and the average grain size of the titanium dioxide is 300 nm.

2. A water-based industrial heat-insulating coating with light reflection heat insulation and corrosion prevention effects is characterized in that:

the formula comprises the following components: 50g of high-molecular emulsion, 35g of light-reflecting filler, 3g of anticorrosive filler, 5g of heat-insulating filler, 18g of common filler, 6g of curing agent, 4g of nano filler, 4g of dispersing agent, 2g of film-forming assistant, 0.3g of thickening agent, 0.2g of defoaming agent, 0.5g of wetting agent, 2g of antifreezing agent and 30g of deionized water; the light reflection filler is 30g of titanium dioxide and 5g of zinc oxide; the common filler comprises 5g of ground calcium carbonate, 5g of mica powder and 8g of barium sulfate; the dispersing agent is 1g of ethylene oxide-propylene oxide-ethylene oxide triblock polymer and 3g of polyethylene oxide-polyacrylate block polymer;

the polymer emulsion is hydroxyl acrylic emulsion; the anticorrosive filler is graphene; the heat insulation filler is hollow glass microspheres; the curing agent is isocyanate; the nano filler is indium tin oxide; the film-forming additive is alcohol ester-12; the thickening agent is polyurethane; the defoaming agent is polydimethylsiloxane; the wetting agent is sodium hexametaphosphate; the antifreezing agent is propylene glycol;

the particle size of the indium tin oxide is 100nm, the average particle size of the titanium dioxide is 300nm, and the average number of graphene sheets is 7-8.