CN114316737A - Water-based high-performance flexible ceramic coating and preparation method thereof - Google Patents
Water-based high-performance flexible ceramic coating and preparation method thereof Download PDFInfo
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Images
Abstract
The invention discloses a water-based high-performance flexible ceramic coating, which comprises the following components in parts by weight and g: 40-55g of epoxy emulsion, 5-15g of organic silicon resin emulsion, 5-10g of silicon dioxide hollow microspheres, 1-2g of water-based dispersing agent, 0.2-0.5g of water-based base material wetting agent, 0.5-3g of pH regulator, 0.1-1g of water-based rheological additive, 0.1-0.5g of water-based defoaming agent, 5-10g of deionized water, 5-8g of filler and 4-8g of water-based epoxy curing agent. The paint prepared by the invention has excellent salt mist resistance, acid and alkali resistance, good adhesion, high temperature resistance and oil resistance, expands the space for the technical application of the water-based ceramic paint, and provides a new research and development idea.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to a water-based high-performance flexible ceramic coating and a preparation method thereof.
Background
The water-based ceramic coating is a novel environment-friendly nontoxic coating with low VOC emission, has the advantages of non-adhesion, high temperature resistance, high hardness, super weather resistance, self-cleaning, corrosion resistance, high temperature oxidation resistance and the like, and is an ideal coating. In recent years, the trend of industrial and commercial application of ceramic coatings in the fields of chemical corrosion prevention, aviation, automobiles, kitchen equipment and the like is more and more obvious, and research work of the ceramic coatings becomes a hot spot of great interest.
CN1415681A discloses an epoxy ceramic coating, which is prepared by uniformly mixing a component A consisting of epoxy resin, a leveling agent, quartz powder and an anti-settling agent and a component B consisting of a curing agent, a toughening agent, the leveling agent and the anti-settling agent in a ratio of 1: 1. The paint has the advantages of high strength, high adhesion, high elasticity, etc., and may be cured at normal temperature and constructed at normal temperature. CN101074340 adopts ceramic powder, modified epoxy resin, diluent and dispersant to form a first component, modified amine curing agent is a second component, and the epoxy ceramic coating is obtained by rolling and mixing evenly. The coating has high surface hardness and high corrosion resistance in acid-base environments, and solves the problem that the conventional heavy-duty anticorrosive coating cannot achieve the wear resistance, acid resistance and alkali resistance. CN10184526A in order to solve the problems of low hardness, poor scratch resistance, further improvement of corrosion resistance and the like of the fluorocarbon coating, a high-hardness ceramic coating with excellent corrosion resistance is prepared by adopting bisphenol A epoxy resin, submicron ceramic powder, titanium dioxide, amino, an epoxy resin curing agent and a high molecular dispersing agent. Wherein the epoxy resin, the phenolic resin and the amino resin are cured at high temperature to form the coating. The coating can provide effective protection for metal surfaces such as aluminum alloy and the like. The coating made of the paint has excellent corrosion resistance and mechanical property. The mechanical property is 4H, the adhesive force is 1 grade, the hardness of the common epoxy coating is 2H, and the coating is more suitable for the fields of aerospace, marine ships, chemistry and chemical engineering and the like.
Although the ceramic coating has the advantages, the common ceramic coating on the market at present contains a large amount of organic solvents, so that the environment is polluted, and the health of construction workers is damaged. Meanwhile, the traditional ceramic coating is of a highly crosslinked inorganic IPN structure after being cured into a film, so that the coating has more hardness and insufficient toughness, and the coating is likely to be damaged when being contacted with slight collision or impact, so that the construction requirements of some special workpieces (bending and corner parts) cannot be met. At present, the ceramic paint is focused and applied in the fields of kitchenware, rail transit, transportation pipelines and the like, and if the defects of the paint can be overcome, the application market of the ceramic paint can be greatly expanded.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the technical problems in the prior art, the invention provides a water-based high-performance flexible ceramic coating and a preparation method thereof.
In order to achieve the purpose, the invention discloses a water-based high-performance flexible ceramic coating which is characterized by comprising the following components in parts by weight and g: 40-55 parts of epoxy emulsion, 5-15 parts of organic silicon resin emulsion, 5-10 parts of silicon dioxide hollow microspheres, 1-2 parts of water-based dispersing agent, 0.2-0.5 part of water-based base material wetting agent, 0.5-3 parts of pH regulator, 0.1-1 part of water-based rheological additive, 0.1-0.5 part of water-based defoaming agent, 5-10 parts of deionized water, 5-8 parts of filler and 4-8 parts of water-based epoxy curing agent.
Specifically, the silica hollow microsphere is prepared by the following steps:
dissolving a certain amount of nonionic surfactant and hydrochloric acid in deionized water to uniformly form a water phase, dissolving the nonionic surfactant in cyclohexane, uniformly mixing to obtain an oil phase, taking out a half of the oil phase mixture, preferably, slowly dripping the water phase into a flask containing the rest oil phase at room temperature, stirring for reaction, preferably, stirring at the speed of 1200rap for 30min to form a uniform water-in-oil reverse phase miniemulsion, measuring a certain amount of tetraethyl silicate, uniformly mixing with the oil phase, aging, adjusting the rotation speed to 500 and 600rap in a water bath condition at 20-25 ℃, pouring the oil phase mixture of the tetraethyl silicate into the reverse phase miniemulsion at one time, continuously reacting for 20-24h, centrifuging, washing with anhydrous ethanol, and performing vacuum drying treatment at 40-45 ℃, obtaining the white powdery silicon dioxide hollow microspheres.
Preferably, the nonionic surfactant is a composition of one or more of span-80, Tween-60, Tween-61 and Tween-80. The hydrophilic and lipophilic surfactants are adopted respectively to help the surface tension of oil-water two phases to be close so as to form a water-in-oil structure with good dispersibility and stable structure.
Wherein, in the preparation of the silicon dioxide hollow microsphere, the components are as follows according to the parts by weight: 0.6-1 part of surfactant, 3-5 parts of deionized water, 0.6-1.5 parts of hydrochloric acid, 70-90 parts of cyclohexane and 6-8 parts of tetraethyl silicate.
The waterborne epoxy emulsion is a composition of one or more of Zhanxin BECKOPOX VEP 2381W/55WA, Fuqisen AQUAER-3012 or Xinghua E-11, and is benzyl modified waterborne epoxy resin emulsion with good weather resistance.
The organic silicon resin emulsion is watt MPF 52E or MP 50E. The organic silicon resin emulsion is benzyl organic silicon resin emulsion containing methoxy functional groups, the solid content of the emulsion is 57-63%, the high temperature resistance of the emulsion after film forming can reach 350 ℃, and the high temperature resistance and the corrosion resistance of the coating can be effectively improved.
The aqueous dispersant is BYK-190, TEGO-760 or VX-6208, and can effectively disperse pigments and fillers in the formula and enhance the stability of the system. The pH regulator is dimethylethanolamine or AMP-95, and the storage stability of the coating system is improved by stabilizing the pH of the coating system within the range of 8-9. The water-based substrate wetting agent is TEGO-4000, SURFYNOL 104E or BYK-345, so that the substrate wettability is effectively improved, the shrinkage cavity is prevented, and the generation of micro bubbles is reduced; the aqueous rheological additive is Ming Ling PUR-44 or Rohm and Haas 8W, and can improve the static viscosity and dynamic rheological property of the coating.
The water-based defoaming agent is TEGO-901W or BYK-024, and bubbles and microbubbles generated by a surfactant in the process of dispersing and grinding the coating are eliminated; the filler is one or a combination of more of kaolin, titanium dioxide or talcum powder, and the mica powder has the advantages of acid and alkali resistance, good chemical stability, good insulation, heat resistance, incombustibility and corrosion resistance. Kaolin has the advantages of insulation, flame retardance, fire resistance, weather resistance, stable chemical performance, high light scattering rate and the like. The titanium dioxide has the characteristics of strong covering property and excellent weather resistance.
The water-based epoxy curing agent is Houxian 6008 or Fuqisen AQUAEPO-3125, and the water-dispersible amine curing agent reacts with the water-based epoxy resin to generate a compact cross-linked reticular coating film, so that various physical properties of the coating film are effectively improved.
The invention further provides a preparation method of the water-based high-performance flexible ceramic coating, which comprises the following steps:
s1: sequentially adding the water-based dispersing agent, the water-based defoaming agent and the filler into deionized water under a stirring state, and then stirring and dispersing at a high speed until the mixture is uniform and free of agglomeration; then transferring the slurry into a sand mill, and grinding the slurry until the fineness of the slurry is less than or equal to 50 mu m;
s2: sequentially adding the water-based epoxy emulsion, the organic silicon resin emulsion, the silicon dioxide hollow microspheres, the pH regulator, the water-based base material wetting agent and the water-based defoaming agent into the slurry prepared in the S1, and quickly and uniformly stirring; then adding an aqueous rheological additive to adjust the system viscosity to 70-90KU, thus obtaining the aqueous high-performance flexible ceramic coating;
s3: mixing the water-based high-performance flexible ceramic coating and the water-based epoxy curing agent according to a certain proportion, uniformly dispersing, adding deionized water for diluting until the viscosity is 30-45KU, spraying the coating on a substrate, and curing at 120 ℃ for 30min to obtain the water-based high-performance flexible ceramic coating.
Has the advantages that: compared with the prior art, the invention adopts benzyl modified waterborne epoxy resin emulsion with excellent adhesive force and good weather resistance as a matrix, and is matched with organic silicon resin emulsion with excellent corrosion-resistant medium and more flexible molecular chain, the Si-O-Si bond in the organic silicon resin has higher energy and excellent corrosion resistance, and simultaneously, because the surface energy of the organic silicon is lower, the organic silicon continuously migrates to the surface of a coating in the film forming process, the surface tension of an interface can be effectively reduced, and the contamination resistance effect of the coating is improved; finally, self-made silica hollow microspheres are introduced into the filler, and the microspheres have a hollow structure and good contraction elasticity, so that the stress contraction of the coating can be effectively overcome by uniformly distributing and inserting the hollow microspheres among the high-molecular main chains, and the toughness and the impact resistance of the coating are improved. The coating obtained by the invention belongs to a sustainable green and environment-friendly product, not only ensures the excellent performance of the product, but also reduces the pollution of coating construction to the environment and the physical harm of constructors for a customer unit, and has the characteristics of non-combustion, non-explosion and the like. According to the technology, the silica hollow microspheres and the water-based organic silicon resin emulsion are introduced to modify the water-based epoxy resin, so that the defect of insufficient flexibility of the product in the past is overcome, and the characteristics of excellent salt mist resistance, acid and alkali resistance, good adhesion, high temperature resistance and oil-resistant medium of the product are further improved, so that the space is expanded for the technical application of the water-based ceramic coating, and a new research and development idea is provided.
Drawings
FIG. 1 is an electron micrograph of hollow silica microspheres prepared in example 2.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which will help understanding the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
(1) Preparing hollow silica microspheres:
the dosage of the components is as follows: surfactant span-800.5 g, surfactant Tween-800.5 g, deionized water 4g, TEOS 8g, cyclohexane 86g and hydrochloric acid 1 g.
The method comprises the following steps: 0.2g of span-80, 0.2g of Tween-80 and HCl are mutually dissolved in deionized water according to the proportion to form a water phase, 0.3g of span-80 and 0.3g of Tween-80 are dissolved in cyclohexane to be used as an oil phase, and then 43.6g of oil phase mixture is taken out. Slowly adding the water phase into the rest 43g of oil phase, stirring at 1200rap for 30min to form a uniform water-in-oil reverse phase fine emulsion, and uniformly mixing the tetraethyl silicate and the certain amount (43.6g) of oil phase for later use. And then carrying out aging reaction under the condition of water bath at the temperature of 20 ℃, regulating the rotation speed to 600rap, pouring the oil phase mixture of the tetraethyl silicate into the inverse miniemulsion, continuing to react for 24 hours, then centrifuging, washing with absolute ethyl alcohol, and carrying out vacuum drying treatment to obtain white powdery silicon dioxide hollow microspheres.
(2) And (3) preparation of the water-based high-performance flexible ceramic coating.
Proportioning: 55g of epoxy emulsion (Zhanxin BECKOPOX VEP 2381W/55WA), 12g of silicone resin emulsion (Wake MPF 52E), 8g of the silica hollow microspheres, 1.5g of water-based dispersant (TEGO-760), 0.5g of water-based base material wetting agent (TEGO TWIN 4000), 0.8g of pH regulator (AMP-95), 1g of water-based rheological additive (MINGLINPUR-44), 0.2g of water-based defoamer (TEGO-901W), 9g of deionized water, 4g of titanium dioxide (Bailey-BiH BLR-698), 2g of mica powder (morning brocade 800 meshes), 1g of kaolin (Aokay 1250 meshes) and 5g of water-based epoxy curing agent (AQUAEPO-3125).
The preparation method comprises the following steps:
s1: sequentially adding a dispersant TEGO-760, a defoaming agent TEGO-901W, Bailey BLR-698 titanium dioxide, morning brocade 800-mesh mica powder and Okay 1250-mesh kaolin into deionized water in a stirring state, stirring for 400-600rap, and stirring for 10-15min until the mixture is uniformly dispersed without agglomeration; then the slurry is transferred to a sand mill and ground at the rotating speed of 1800 plus 2000rap until the fineness of the slurry is less than or equal to 50 mu m;
s2: sequentially adding the water-based epoxy emulsion (Zhanxin BECKOPOX VEP 2381W/55WA) and the silicon dioxide hollow microspheres prepared from silicone resin Wake MPF 52E, S1, a pH regulator AMP-95, a water-based base material wetting agent TEGO TWIN 4000 and a water-based antifoaming agent TEGO-901W into the slurry prepared from the S1 according to the proportion, and stirring for 20-25min at 800-; then reducing the rotating speed to 600rap, adding an aqueous rheological additive PUR-44 to adjust the system viscosity to 70-90KU, and obtaining the aqueous high-performance flexible ceramic coating;
s3: and (2) mixing the water-based high-performance flexible ceramic coating with a water-based epoxy curing agent AQUAEPO-3125 according to the above-mentioned proportion, uniformly dispersing, adding deionized water to dilute until the viscosity is 35-45KU, spraying the above-mentioned coating on a base material, curing at 120 deg.C for 30min so as to obtain the water-based high-performance flexible ceramic coating.
Example 2
(1) Preparing hollow silica microspheres:
the dosage of the components is as follows: surfactant span-800.7 g, Tween-800.3 g, deionized water 4g, TEOS 8g, cyclohexane 86g and hydrochloric acid 1 g;
the method comprises the following steps: 0.4g of span-80, 0.1g of Tween-80 and HCl are mutually dissolved in deionized water according to the proportion to form a water phase, 0.3g of span-80 and 0.2g of Tween-80 are dissolved in cyclohexane to be used as an oil phase, and then 43g of the oil phase mixture is taken out. Slowly adding the water phase into the rest 44g of oil phase, stirring at 1200rap for 30min to form a uniform water-in-oil reverse phase fine emulsion, and uniformly mixing the tetraethyl silicate and the oil phase according to the proportion for later use. And then carrying out aging reaction under the condition of water bath at the temperature of 20 ℃, regulating the rotation speed to 600rap, pouring the oil phase mixture of the tetraethyl silicate into the inverse miniemulsion, continuing to react for 24 hours, then centrifuging, washing with absolute ethyl alcohol, and carrying out vacuum drying treatment to obtain white powdery silicon dioxide hollow microspheres.
(2) And (3) preparation of the water-based high-performance flexible ceramic coating.
The dosage of the components is as follows: 55g of epoxy emulsion (Zhanxin BECKOPOX VEP 2381W/55WA), 12g of silicone resin emulsion (Wake MPF 52E), 8g of the self-made silica hollow microspheres, 1.5g of water-based dispersant (TEGO-760), 0.5g of water-based base material wetting agent (TEGO TWIN 4000), 0.8g of pH regulator (AMP-95), 1g of water-based rheological additive (MINGLINPUR-44), 0.2g of water-based defoamer (TEGO-901W), 9g of deionized water, 4g of titanium dioxide (Bailey Bin BLR-698), 2g of mica powder (morning brocade 800 meshes), 1g of kaolin (Okay 1250 meshes) and 5g of water-based epoxy curing agent (AQUAEPO-3125).
The preparation method is the same as example 1.
Example 3
(1) Preparing hollow silica microspheres:
the dosage of the components is as follows: surfactant span-800.3 g, Tween-800.7 g, deionized water 4g, TEOS 8g, cyclohexane 86g and hydrochloric acid 1 g;
the preparation method comprises the following steps: 0.1g of span-80, 0.3g of Tween-80 and HCl are mutually dissolved in deionized water according to the proportion to form a water phase, 0.2g of span-80 and 0.4g of Tween-80 are dissolved in cyclohexane to be used as an oil phase, and then 43g of the oil phase mixture is taken out. Slowly adding the water phase into the rest 44g of oil phase, stirring at 1200rap for 30min to form a uniform water-in-oil reverse phase fine emulsion, and uniformly mixing the tetraethyl silicate and the oil phase according to the proportion for later use. And then carrying out aging reaction under the condition of water bath at the temperature of 20 ℃, regulating the rotation speed to 600rap, pouring the oil phase mixture of the tetraethyl silicate into the inverse miniemulsion, continuing to react for 24 hours, then centrifuging, washing with absolute ethyl alcohol, and carrying out vacuum drying treatment to obtain white powdery silicon dioxide hollow microspheres.
(2) And (3) preparation of the water-based high-performance flexible ceramic coating.
The dosage of the components is as follows: 55g of epoxy emulsion (Zhanxin BECKOPOX VEP 2381W/55WA), 12g of silicone resin emulsion (Wake MPF 52E), 8g of the self-made silica hollow microspheres, 1.5g of water-based dispersant (TEGO-760), 0.5g of water-based base material wetting agent (TEGO TWIN 4000), 0.8g of pH regulator (AMP-95), 1g of water-based rheological additive (MINGLINPUR-44), 0.2g of water-based defoamer (TEGO-901W), 9g of deionized water, 4g of titanium dioxide (Bailey Bin BLR-698), 2g of mica powder (morning brocade 800 meshes), 1g of kaolin (Okay 1250 meshes) and 5g of water-based epoxy curing agent (AQUAEPO-3125).
The preparation method comprises the following steps: same as example 1
Example 4
(1) Preparing hollow silica microspheres:
the dosage of the components is as follows: surfactant span-800.7 g, Tween-800.3 g, deionized water 4g, TEOS 8g, cyclohexane 86g and hydrochloric acid 1 g;
the preparation method comprises the following steps: the same as in example 2.
(2) And (3) preparation of the water-based high-performance flexible ceramic coating.
The dosage of the components is as follows: 55g of epoxy emulsion (Zhanxin BECKOPOX VEP 2381W/55WA), 15g of silicone resin emulsion (Wake MPF 52E), 5g of the self-made silica hollow microspheres, 1.5g of a water-based dispersing agent (TEGO-760), 0.5g of a water-based base material wetting agent (TEGO TWIN 4000), 0.8g of a pH regulator (AMP-95), 1g of a water-based rheological additive (MINGLINPUR-44), 0.2g of a water-based antifoaming agent (TEGO-901W), 9g of deionized water, 4g of titanium dioxide (Bailey Bin BLR-698), 2g of mica powder (morning brocade 800 meshes), 1g of kaolin (Okay 1250 meshes) and 5g of a water-based epoxy curing agent (AQUAEPO-3125).
The preparation method comprises the following steps: same as example 1
Example 5
And (3) preparation of the water-based high-performance flexible ceramic coating.
The dosage of the components is as follows: 55g of epoxy emulsion (Zhanxin BECKOPOX VEP 2381W/55WA), 15g of silicone resin emulsion (Wake MPF 52E), 5g of commercially available hollow silica microspheres, 1.5g of water-based dispersant (TEGO-760), 0.5g of water-based base material wetting agent (TEGO TWIN 4000), 0.8g of pH regulator (AMP-95), 1g of water-based rheological additive (MINGLINPUR-44), 0.2g of water-based defoamer (TEGO-901W), 9g of deionized water, 4g of titanium dioxide (Bailey Bin BLR-698), 2g of mica powder (morning brocade 800 meshes), 1g of kaolin (Okay 1250 meshes) and 5g of water-based epoxy curing agent (AQUAEPO-3125).
The preparation method comprises the following steps: same as example 1
The particle sizes of the self-made silica hollow microspheres of examples 1, 2 and 3 were measured and analyzed, and the results are shown in table 1.
TABLE 1 average particle size of hollow silica microspheres
As can be seen from the data in Table 1, when the ratio of the two nonionic surfactants is 1:1 or 3:7, the silica microspheres have large particle size and wide distribution, which is probably caused by the uneven surface tension of the interface between the water phase and the oil phase due to the surfactant in the ratio, so that the dispersibility of the microspheres is poor and local agglomeration is easily generated. When the ratio of the two nonionic surfactants is close to 7:3, the average particle size distribution of the silica hollow microspheres is narrow and the particle size is smaller by about 5 μm, which shows that the addition amount of the surfactants in the ratio can make the surface tension of the water phase and the oil phase close to balance, the system can form a stable water-in-oil structure more easily, and the particle sizes of the silica hollow microspheres are more uniform and stable.
The aqueous high-performance flexible ceramic coatings of examples 1-5 were tested according to the performance test criteria and the results are shown in table 2:
TABLE 2 Performance testing of waterborne high Performance Flexible ceramic coatings
As can be seen from the data in Table 2, when the commercially available silica microspheres are added into the water-based ceramic coating, the solid structure of the silica microspheres leads to excessive hardness of the coating, insufficient toughness and poor impact resistance. Meanwhile, the heat insulation performance is poor due to the solid structure, so that the high-temperature resistance test of the coating is unqualified. When the particle sizes of the silicon dioxide microspheres are different, when the microspheres with larger particle sizes are added into an aqueous ceramic coating system, the flexibility of the coating does not achieve an ideal effect, and the coating cracks in a bending test and an impact test. When the silica hollow microspheres with smaller particle sizes are added into a coating system, the silica hollow microspheres with smaller particle sizes are smaller and uniformly distributed, so that the silica hollow microspheres are more uniformly dispersed in the system and can fill up to tiny gaps in a continuous phase, and after a coating is impacted, the self cavities can be used for absorbing and slowly releasing stress, so that the ceramic coating is endowed with excellent flexibility. Meanwhile, the addition amount of the silica hollow microspheres also influences the weather resistance of the ceramic coating, and when the addition amount is more than 5%, the salt spray resistance, the high temperature resistance and the alkali resistance of the coating do not reach the standard, which is probably because the silica is not alkali-resistant, and excessive addition also influences the compactness of the coating film, so that the organosilicon resin is adopted to replace part of the silica hollow microspheres, and the weather resistance and the alkali resistance of the water-based ceramic coating can be effectively improved.
Compared with the traditional ceramic coating in the market, the product belongs to a sustainable green environment-friendly product, not only ensures the excellent performance of the product, but also reduces the pollution of coating construction to the environment and the physical harm of constructors for a customer unit, and has the characteristics of non-combustion, non-explosion and the like. According to the technology, the silica hollow microspheres and the water-based organic silicon resin emulsion are introduced to modify the water-based epoxy resin, so that the defect of insufficient flexibility of the product in the past is overcome, and the characteristics of excellent salt mist resistance, acid and alkali resistance, good adhesion, high temperature resistance and oil-resistant medium of the product are further improved, so that the space is expanded for the technical application of the water-based ceramic coating, and a new research and development idea is provided.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. The water-based high-performance flexible ceramic coating is characterized by comprising the following components in parts by weight: 40-55 parts of epoxy emulsion, 5-15 parts of organic silicon resin emulsion, 5-10 parts of silicon dioxide hollow microspheres, 1-2 parts of water-based dispersing agent, 0.2-0.5 part of water-based base material wetting agent, 0.5-3 parts of pH regulator, 0.1-1 part of water-based rheological additive, 0.1-0.5 part of water-based defoaming agent, 5-10 parts of deionized water, 5-8 parts of filler and 4-8 parts of water-based epoxy curing agent.
2. The aqueous high-performance flexible ceramic coating according to claim 1, wherein the silica hollow microspheres are prepared by the following steps:
dissolving a certain amount of nonionic surfactant and hydrochloric acid in deionized water to uniformly form a water phase, dissolving the nonionic surfactant in cyclohexane, uniformly mixing to obtain an oil phase, taking out a certain amount of oil phase mixture, slowly dripping the water phase into a flask containing the rest oil phase at room temperature, stirring for reaction, stirring at 1200rap speed for 30min to form a uniform water-in-oil reverse phase miniemulsion, measuring a certain amount of tetraethyl silicate, uniformly mixing with the oil phase for later use, carrying out aging reaction, regulating the rotation speed to 500-600rap under the condition of water bath at 20-25 ℃, pouring the oil phase mixture of the tetraethyl silicate into the reverse phase miniemulsion at one time, continuously reacting for 20-24h, centrifuging, washing with absolute ethyl alcohol, and carrying out vacuum drying treatment at 40-45 ℃, obtaining the white powdery silicon dioxide hollow microspheres.
3. The aqueous high-performance flexible ceramic coating according to claim 3, wherein the non-ionic surfactant is a combination of one or more of span-80, Tween-60, Tween-61 and Tween-80.
4. The water-based high-performance flexible ceramic coating according to claim 3, wherein in the preparation of the silica hollow microspheres, the components are as follows by weight: 0.6-1 part of surfactant, 3-5 parts of deionized water, 0.6-1.5 parts of hydrochloric acid, 70-90 parts of cyclohexane and 6-8 parts of tetraethyl silicate.
5. The waterborne high performance flexible ceramic coating of claim 1, wherein the waterborne epoxy emulsion is a composition of one or more of Zhanxin BECKOPOX VEP 2381W/55WA, Fuqisen AQUAER-3012 or Xinghua E-11.
6. The aqueous high-performance flexible ceramic coating according to claim 1, wherein the silicone resin emulsion is wacker MPF 52E or MP 50E.
7. The aqueous high performance flexible ceramic coating of claim 1, wherein the aqueous dispersant is BYK-190, TEGO-760 or VX-6208; the pH regulator is dimethylethanolamine or AMP-95; the water-based base material wetting agent is TEGO-4000, SURFYNOL 104E or BYK-345; the aqueous rheological additive is Ming Ling PUR-44 or Rohm and Haas 8W.
8. The aqueous high-performance flexible ceramic coating according to claim 1, wherein the aqueous defoamer is TEGO-901W or BYK-024; the filler is one or a combination of more of kaolin, titanium dioxide and talcum powder.
9. The water-based high-performance flexible ceramic paint as claimed in claim 1, wherein the water-based epoxy curing agent is Houxian 6008 or Fuqisen AQUAEPO-3125.
10. The method for preparing the aqueous high-performance flexible ceramic coating according to any one of claims 1 to 9, comprising the steps of:
s1: sequentially adding the water-based dispersing agent, the water-based defoaming agent and the filler into deionized water under a stirring state, and then stirring and dispersing at a high speed until the mixture is uniform and free of agglomeration; then transferring the slurry into a sand mill, and grinding the slurry until the fineness of the slurry is less than or equal to 50 mu m;
s2: sequentially adding the water-based epoxy emulsion, the organic silicon resin emulsion, the silicon dioxide hollow microspheres, the pH regulator, the water-based base material wetting agent and the water-based defoaming agent into the slurry prepared in the S1, and quickly and uniformly stirring; then adding an aqueous rheological additive to adjust the system viscosity to 70-90KU, thus obtaining the aqueous high-performance flexible ceramic coating;
s3: mixing the water-based high-performance flexible ceramic coating and the water-based epoxy curing agent according to a certain proportion, uniformly dispersing, adding deionized water for diluting until the viscosity is 30-45KU, spraying the coating on a substrate, and curing at 120 ℃ for 30min to obtain the water-based high-performance flexible ceramic coating.
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