A self-drying quick-setting encapsulating insulating coating for power systems and its preparation process

Abstract

The invention discloses a self-drying quick-setting encapsulated insulating coating for power systems and a preparation process thereof. The insulating coating comprises a film-forming substance, a pigment, a solvent, a quick-setting agent, a curing agent and a catalyst, wherein the film-forming substance comprises a bismaleimide resin, a tetrafluoroethylene copolymer resin, γ-trifluoropropyl methyl silicone rubber and a hydroxy-terminated nitrile butadiene latex, the quick-setting agent comprises an organic bentonite, α-butyl cyanoacrylate and polyacrylonitrile, and the curing agent comprises hexamethylene diisocyanate, diphenylmethane diisocyanate and methyl triallyloxysilane. The preparation process disclosed in the invention requires the steps of pre-mixing, grinding, dispersing, pre-polymerization, blending, mixing, molding and packaging. The insulating coating of the invention can form an insulating layer of 1 mm to 5 mm in a single coating, thereby improving not only the insulating ability of the coating but also the comprehensive performance in various aspects such as electrical performance, acid and alkali resistance and weather aging resistance, and can solve the insulation technology problem of on-site molding in various fields such as power system distribution network, high voltage, ultra-high voltage and extra-high voltage.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings and relates to an insulating coating, in particular to a self-drying quick-setting encapsulated insulating coating for a power system and a preparation process thereof. Background Art

[0002] Insulating materials, capable of separating conductors of unequal potential, are widely used in power systems. Insulating coatings, a type of insulating material, are commonly used in high-voltage, extra-high-voltage, and ultra-high-voltage systems due to their on-site molding capabilities. However, distribution networks and low-voltage transmission systems, long neglected, face a more pressing need for insulating coatings to address insulation issues.

[0003] Distribution networks and low-voltage transmission systems are the terminals that complete the closed-loop power supply chain, crucial for delivering electricity to consumers through the "last mile." 10kV overhead lines in distribution networks often experience tripping, equipment damage, and exposed equipment or conductors due to foreign objects such as plastic sheeting, kite strings, or wire, as well as conflicts between trees and lines. These problems impact the network's normal operation. In recent years, improvements in the ecological environment have significantly increased the number of animals, such as birds and voles, leading to a rise in the number of distribution network faults caused by animal activity.

[0004] The most convenient and effective way to resolve these faults is to encapsulate exposed conductive points on-site with a high-insulation coating. This coating quickly forms a fully enclosed insulating layer on the surface of the conductor, allowing the solid dielectric layer to withstand high voltages and eliminate faults caused by air shorts. However, the film thickness of a single application of insulating coating is thin, only 30 to 50 μm. Even high-viscosity insulating coatings can only achieve a film thickness of around 100 μm. The insulation encapsulation of exposed conductive points in high-voltage equipment requires calculating the thickness of the insulation layer in millimeters based on the voltage level. Due to the low insulation performance of existing insulating coatings, they cannot meet the insulation requirements of a single application and rapid encapsulation. Multiple re-applications are required to maintain the film thickness and increase the insulation layer thickness to meet insulation requirements. This results in prolonged repair times for power system faults, severely disrupting normal life and production activities, and causing significant social impact and economic losses.

[0005] Therefore, there is an urgent need for an insulating coating with a one-time coating thickness sufficient to meet the insulation packaging requirements of exposed points of high-voltage equipment, which can be quickly packaged and formed and has high insulation performance. Summary of the Invention

[0006] The purpose of the present invention is to provide a self-drying quick-setting encapsulating insulating coating for power systems and a preparation process thereof, which can achieve a one-time coating thickness that meets the insulation encapsulation requirements of exposed points of high-voltage equipment.

[0007] The technical solution adopted by the present invention is a self-drying quick-setting encapsulated insulating coating for power systems, which comprises a film-forming substance, a pigment, a solvent, a quick-setting agent, a curing agent and a catalyst. The key is that the above-mentioned film-forming substance includes bismaleimide resin, tetrafluoroethylene copolymer resin, γ-trifluoropropyl methyl silicone rubber and terminal hydroxy-butyl nitrile latex; the above-mentioned quick-setting agent includes organic bentonite, α-cyanoacrylate and polyacrylonitrile; the above-mentioned curing agent includes hexamethylene diisocyanate, diphenylmethane diisocyanate and methyl triallyloxysilane.

[0008] Furthermore, the pigments and fillers include rutile titanium dioxide, silicon dioxide, perchloropentacyclopentane, triphenyl phosphate, aluminum oxide, calcium carbonate and kaolin; the catalyst includes dibutyltin dilaurate and tetraisopropyl titanate; and the solvent includes methyl isobutyl ketone, N-methylpyrrolidone, dimethylacetamide and xylene.

[0009] Furthermore, the composition further comprises, by weight, 0.1 to 0.5 parts of a defoaming agent, 2 to 5 parts of a coupling agent, 0.5 to 1 part of a stabilizer, 0.5 to 1 part of a wetting and dispersing agent, 0.5 to 2 parts of a matting agent and 0 to 3 parts of a color paste.

[0010] Preferably, the film-forming substance comprises, by weight, 30 to 60 parts of bismaleimide resin liquid, 20 to 50 parts of tetrafluoroethylene copolymer resin liquid, 30 to 60 parts of γ-trifluoropropyl methyl silicone rubber, and 2 to 10 parts of hydroxy-terminated nitrile butadiene rubber latex; the accelerator comprises 3 to 10 parts of organic bentonite slurry, 1 to 5 parts of α-cyanoacrylate butyl ester, and 1 to 5 parts of polyacrylonitrile pulp; the curing agent comprises 6 to 12 parts of hexamethylene diisocyanate, 3 to 8 parts of diphenylmethane diisocyanate, and 2 to 6 parts of methyl triallyloxysilane; The above-mentioned pigments and fillers include 3-8 parts of rutile titanium dioxide, 5-25 parts of silicon dioxide, 10-20 parts of perchloropentacyclopentane, 5-15 parts of triphenyl phosphate, 10-30 parts of aluminum oxide, 5-20 parts of calcium carbonate and 5-15 parts of kaolin; the above-mentioned catalyst includes 0.5-2 parts of dibutyltin dilaurate and 0.5-1.5 parts of tetraisopropyl titanate; the above-mentioned solvent includes 25-50 parts of methyl isobutyl ketone, 30-60 parts of N-methylpyrrolidone, 35-60 parts of dimethylacetamide and 25-50 parts of xylene.

[0011] A preparation process of a self-drying quick-setting encapsulated insulating coating for power systems includes the steps of dispersion, prepolymerization, blending, mixing, molding and packaging. The key point is that it also includes pre-mixing and grinding steps before the dispersion step.

[0012] Specifically, the above-mentioned pre-refining step is to add the pigments and fillers in sequence to the double-cone mixing reactor, control the rotation speed to 10r / min~60r / min, heat to 105℃~165℃, mix, react, and dry for 60min~180min; add the film-forming material in sequence to the stirring kettle, stir and mix evenly; the mixed film-forming material and the dried pigments and fillers are continuously fed into the twin-screw extruder, the aspect ratio of the twin-screw extruder is in the range of 20~50:1, and pre-refining is carried out under mechanical extrusion pressure, the friction temperature is raised to 70℃~100℃, and the material residence time is 90s~180s.

[0013] Specifically, the above-mentioned grinding steps are as follows: the material after pre-refining is sent into the spiral tube impregnator, the material moves downward in the spiral tube, the impregnation time is 2h to 4h, and the material after impregnation enters the self-unloading roller machine, the material film thickness is adjusted to 30μm to 100μm, and reciprocating grinding is performed 2 to 3 times.

[0014] Furthermore, the above-mentioned dispersion step is specifically as follows: adding the ground material into a stirring and dispersing kettle, adding solvents in turn, stirring and beating, shearing and dispersing at a line speed of 1000m / min~3000m / min for 0.5h~1h, controlling the temperature ≤70°C, and then re-dispersing through a homogenizing fluid pump to obtain a basic stock solution.

[0015] Furthermore, the above-mentioned prepolymerization step is specifically as follows: the dispersed material is fed into a prepolymerization reactor, cooled to ≤40°C, a stabilizer, a wetting dispersant, and a matting agent are added in sequence, and the reaction is maintained for 0.5h to 1h; then a defoaming agent and a coupling agent are added and the reaction is continued for 0.5h to 1h to obtain a prepolymerization reaction liquid.

[0016] Furthermore, the above-mentioned blending step is specifically as follows: feeding the pre-polymerized material into a paint mixing kettle, adding an accelerating agent under stirring, stirring for 15 minutes to 30 minutes, and beating the slurry evenly;

[0017] The above-mentioned preparation steps are specifically as follows: testing the viscosity of the blended material and controlling the viscosity to 80 mPa·s to 300 mPa·s by adding solvent;

[0018] The above-mentioned molding and packaging are specifically as follows: the prepared coating is filtered, measured, and packaged into component A; the curing agent and catalyst are compounded, measured, and packaged into component B; component B is added to component A, stirred or shaken evenly, and then it can be used; the above-mentioned use can be carried out by spraying, brushing or roller coating.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention has excellent self-drying and curing properties. After spraying or other coating methods, it can quickly gel and adhere to the surface of exposed conductive parts of electrical equipment. One coating can form an insulation layer of 1mm to 5mm, thereby improving the insulation capacity of the solid insulating medium and achieving the effect of efficient and rapid establishment of insulation protection. It can meet the insulation technical requirements of on-site forming in various fields such as distribution networks, high voltage, ultra-high voltage and ultra-high voltage.

[0021] 2. This invention utilizes a combination of film-forming materials, including bismaleimide resin liquid, tetrafluoroethylene copolymer resin liquid, and γ-trifluoropropyl methyl silicone rubber, to produce an insulating coating with electrical properties far superior to conventional insulating materials. The dielectric strength of this invention can reach over 30 kV / mm, twice that of conventional insulating materials. The use of fluorinated insulating materials also enhances the coating's weathering resistance. The combination of hydroxy-terminated nitrile butadiene rubber latex and fluorinated polymer further improves the insulating coating's oil and corrosion resistance.

[0022] 3. The combination of pigments, fillers and film-forming materials in the present invention improves the mechanical strength, flame retardancy, arc resistance and electrical erosion resistance of the insulating coating; the quick-setting agent of the present invention has no viscosity-increasing side effect during the coating process, has low shear force and low spraying power requirements; the present invention has strong adaptability to different electrical equipment and diverse and flexible coating methods

[0023] 4. The preparation process of the present invention is unique. The smooth progress of the process is ensured by "pre-refining and grinding". The entire process improves the dispersion effect of the material, overcomes the agglomeration and precipitation of pigments and fillers, and the prepared insulating coating has high quality stability and good uniformity.

[0024] In summary, the present invention has a wide range of application scenarios and can solve the insulation technology problems of on-site forming in the fields of power system distribution network, high voltage, extra high voltage and ultra-high voltage. DETAILED DESCRIPTION

[0025] The present invention provides a self-drying, quick-setting, encapsulated insulating coating for power systems and its preparation process. The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments represent only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0026] Example 1 to Example 12

[0027] (1) Components and dosage implementation

[0028] The specific names and amounts (in parts by mass) of the components in each combination are shown in Table 1, wherein the defoaming agent, coupling agent, stabilizer, wetting and dispersing agent, matting agent and color paste are all commonly used additives in this field and are industrial products that can be directly purchased on the market.

[0029] Table 1: Name and amount of each component in the embodiment (unit: part)

[0030]

[0031] Table 1: Name and dosage of each component in the embodiment (unit: part)

[0032]

[0033] Table 1: Name and dosage of each component in the embodiment (unit: part)

[0034]

[0035] (2) Preparation process implementation method

[0036] The specific operation steps of the preparation process are as follows. The specific parameters of each implementation scheme are shown in Table 2:

[0037] S1: Pre-training

[0038] (1) Add pigments and fillers into a double cone mixing reactor in sequence, control the speed and heat according to the requirements of Table 2, mix, react and dry;

[0039] (2) Add the film-forming substances into the stirring tank in sequence and stir to mix evenly;

[0040] (3) The mixed film-forming material and the dried pigment and filler are continuously fed into a twin-screw extruder. The aspect ratio of the twin-screw extruder is shown in Table 2. The material is heated by friction under mechanical extrusion pressure and stays for a certain period of time.

[0041] S2: Grinding

[0042] (1) The material after pre-refining is sent into the spiral tube infiltrator. Under the action of thrust and deadweight, the material moves downward in the spiral tube and is infiltrated in the spiral tube for a certain period of time;

[0043] (2) Send the soaked material into the self-unloading roller mill, adjust the film thickness according to the requirements of Table 2 and grind it back and forth.

[0044] S3: Decentralized

[0045] (1) The ground material is added to a stirring and dispersing kettle, and the solvent is added in sequence. After stirring and beating, shear dispersion is carried out at the linear speed required in Table 2 for a certain time and the process temperature is controlled;

[0046] (2) The above materials are dispersed again by a homogenizing fluid pump to obtain a basic stock solution, which enters the next process.

[0047] S4: Pre-gathering

[0048] (1) The dispersed base stock solution is fed into a prepolymerization reactor, the reactor is cooled, and a stabilizer, a wetting dispersant, and a matting agent are added in sequence, and the reaction is maintained for a certain period of time;

[0049] (2) Add defoaming agent and coupling agent and continue the reaction for a certain period of time to obtain a prepolymerization reaction liquid.

[0050] S5: Harmony

[0051] The prepolymerization reaction liquid is fed into the paint mixing kettle, and the accelerating agent is added while stirring, and the mixture is stirred and beaten until uniform to form a quick-setting fluid with suspension properties.

[0052] S6: Provisioning

[0053] (1) Test the viscosity of the quick-setting fluid and adjust the viscosity to the range shown in Table 2 by adding an appropriate amount of solvent;

[0054] (2) You can choose the color you want and add color paste, stir evenly to get the paint that meets the requirements.

[0055] S7: Forming and packaging

[0056] (1) The prepared coating is filtered, measured, and packaged to form component A;

[0057] (2) After compounding the curing agent and catalyst according to the dosage in Table 1, package them into component B.

[0058] When using, add component B to component A and stir or shake evenly.

[0059] Table 2: Process parameters of the preparation process of each embodiment

[0060]

[0061] Table 2: Process parameters of the preparation process of each embodiment

[0062]

[0063] (3) Application method

[0064] Application method 1: spray once as usual.

[0065] Application method 2: Apply once with a regular brush.

[0066] Application method 3: Conventional roller coating once.

[0067] Application method 4: Use an insulated boom truck for live spraying.

[0068] Specifically, a miniaturized complete set of spraying equipment is composed of a small screw air compressor, a mobile power supply, a high-pressure silo, a spray gun and an insulating rod; the small complete set of spraying equipment is placed in a lifting truck bucket, and the operators enter together; the insulated bucket truck is lifted, and the live spraying operation is carried out on the insulating platform.

[0069] Application method 5: Use pedal operation for charged spraying

[0070] Specifically, the charged spraying of the quick-setting encapsulating insulating coating is carried out with an insulating operating rod. The charged spraying of the quick-setting encapsulating insulating coating is carried out with an insulating operating rod.

[0071] Carry out implementation according to Table 3 to obtain corresponding embodiments.

[0072] Table 3: Comparison of components, preparation methods and application methods of each embodiment

[0073]

[0074] Analysis and testing

[0075] Samples 1 to 12 were analyzed and tested. For specific analysis items and methods, see Table 4.

[0076] Table 4: Analysis and test items and methods

[0077]

[0078] The test results of each embodiment are shown in Table 5.

[0079] Table 5: Summary of Example Analysis and Test Results

[0080]

[0081] Comparative Example

[0082] Comparative Example 1

[0083] The materials used in Comparative Example 1 refer to Combination 1, and the preparation process uses Scheme 1, except that the type and amount of film-forming substances used are different from those in Combination 1 (see Table 6).

[0084] Table 6: Type and amount of film-forming materials used in Comparative Example 1 (unit: part)

[0085]

[0086] Comparative combinations 1-1 to 1-6 were applied using application methods 1 to 5, respectively. It was found that the wet film thickness of a single coat of application methods 1 to 3 ranged from 90 μm to 350 μm, the wet film thickness of application method 4 ranged from 250 μm to 400 μm, and the wet film thickness of application method 5 ranged from 300 μm to 550 μm. None of these achieved the requirement of a wet film thickness of at least 1 mm. Furthermore, the dielectric strength, oil resistance, corrosion resistance, and aging resistance of comparative combinations 1-1 to 1-6 were found to be reduced to varying degrees. The test results for some indicators of comparative combinations 1-1 to 1-6 are shown in Table 7.

[0087] Table 7: Summary of test results of some indicators of comparative example 1

[0088]

[0089]

[0090] As shown in Table 7, the present invention not only improves the wet film thickness of the disposable coating, but also improves the dielectric strength of the coating, improves the insulation capacity of the coating, and can quickly establish insulation protection when in use. In addition, it was also found in the test process that the hydroxy-terminated nitrile latex is used in combination with a fluoropolymer to further improve the oil resistance and corrosion resistance of the insulating material. Therefore, the present invention can meet the insulation technology requirements of on-site molding in various fields such as power system distribution network, high voltage, ultra-high voltage and ultra-high voltage.

[0091] Comparative Example 2

[0092] The materials used in Comparative Example 2 refer to Combination 1, and the preparation process uses Scheme 1, except that the type and amount of pigments and fillers used are different from those in Combination 1 (see Table 8).

[0093] Table 8: Types and amounts of pigments and fillers used in Comparative Example 2 (unit: part)

[0094]

[0095] Comparative combinations 2-1 to 2-4 were analyzed and tested, and it was found that their mechanical strength, flame retardancy, arc resistance and electrical erosion resistance were reduced to varying degrees. Some of the test results are shown in Table 9.

[0096] Table 9: Summary of test results of some indicators of comparative example 2

[0097]

[0098]

[0099] Comparative Example 3

[0100] The materials used in Comparative Example 3 refer to Combination 1, and the preparation process selects Scheme 1, except that the type and amount of the accelerating agent used are different from those in Combination 1 (see Table 10).

[0101] Table 10: Type and dosage of accelerator used in Comparative Example 3 (unit: part)

[0102]

[0103] It was found in the experiment that the quick-setting agent used in the present invention not only has a good quick-setting effect, but also has many advantages such as no side effect of viscosity increase, low shear force value, and low spraying power requirement.

[0104] Comparative Example 4

[0105] The materials used in Comparative Example 4 refer to Combination 1, and the preparation process uses Scheme 1, except that the types and amounts of the curing agent and catalyst are different from those in Combination 1 (see Table 11).

[0106] Table 11: Types and amounts of curing agents and catalysts used in Comparative Example 4 (unit: part)

[0107]

[0108] The comparative combinations 4-1 to 4-6 were analyzed and tested, and the specific results are shown in Table 12.

[0109] Table 12: Summary of test results of some indicators of comparative example 4

[0110]

[0111] As can be seen from the results in Table 12, the present invention not only ensures that a one-time coating can reach more than 1 mm, but also further improves the coating's high and low temperature resistance, corrosion resistance under acid and alkali conditions, moisture and heat resistance, and wear resistance by adding a variety of pigments and fillers and the combined effect of the pigments and fillers used and film-forming substances.

[0112] Comparative Example 5

[0113] The materials used in Comparative Example 5 refer to Combination 1 and Scheme 1 of the preparation process. The difference is that steps S1 and S2 are not performed during the preparation process compared to Scheme 1. When performing step S3, the film-forming material and pigment filler are added to the stirring and dispersing kettle in sequence, and then the solvent is added in sequence. After stirring and slurrying, it is found that a large amount of material is agglomerated and precipitated, and cannot be used for subsequent preparation.

[0114] This is because the materials used in the present invention are diverse in type and complex in nature. Due to the interaction between the materials, problems such as agglomeration and precipitation are very likely to occur. Special treatment is required to ensure the smooth progress of the process and to fully utilize the characteristics of each material to prepare an insulating coating that meets the requirements.

Claims

1. A self-drying quick-setting encapsulating insulating coating for power systems, comprising a film-forming substance, a pigment, a solvent, a quick-setting agent, a curing agent and a catalyst, characterized in that: The film-forming material includes bismaleimide resin, tetrafluoroethylene copolymer resin, γ-trifluoropropyl methyl silicone rubber and hydroxy-terminated nitrile latex; the accelerating agent includes organic bentonite, α-butyl cyanoacrylate and polyacrylonitrile; the curing agent includes hexamethylene diisocyanate, diphenylmethane diisocyanate and methyl triallyloxysilane; The pigments and fillers include rutile titanium dioxide, silicon dioxide, perchloropentacyclopentane, triphenyl phosphate, aluminum oxide, calcium carbonate and kaolin; the catalyst includes dibutyltin dilaurate and tetraisopropyl titanate; the solvent includes methyl isobutyl ketone, N-methylpyrrolidone, dimethylacetamide and xylene; It also includes, by mass, 0.1 to 0.5 parts of defoaming agent, 2 to 5 parts of coupling agent, 0.5 to 1 part of stabilizer, 0.5 to 1 part of wetting and dispersing agent, 0.5 to 2 parts of matting agent and 0 to 3 parts of color paste; In parts by mass, the film-forming substance comprises 30-60 parts of bismaleimide resin liquid, 20-50 parts of tetrafluoroethylene copolymer resin liquid, 30-60 parts of γ-trifluoropropyl methyl silicone rubber and 2-10 parts of hydroxy-terminated nitrile latex; the accelerator comprises 3-10 parts of organic bentonite slurry, 1-5 parts of α-cyanoacrylate butyl and 1-5 parts of polyacrylonitrile pulp; the curing agent comprises 6-12 parts of hexamethylene diisocyanate, 3-8 parts of diphenylmethane diisocyanate and 2-6 parts of methyl triallyloxysilane; the The pigments and fillers include 3-8 parts of rutile titanium dioxide, 5-25 parts of silicon dioxide, 10-20 parts of perchloropentacyclopentane, 5-15 parts of triphenyl phosphate, 10-30 parts of aluminum oxide, 5-20 parts of calcium carbonate and 5-15 parts of kaolin; the catalyst includes 0.5-2 parts of dibutyltin dilaurate and 0.5-1.5 parts of tetraisopropyl titanate; the solvent includes 25-50 parts of methyl isobutyl ketone, 30-60 parts of N-methylpyrrolidone, 35-60 parts of dimethylacetamide and 25-50 parts of xylene.

2. The preparation process of the self-drying quick-setting encapsulating insulating coating for power systems according to claim 1 comprises the steps of dispersion, prepolymerization, blending, mixing, molding and packaging, and is characterized in that: Before the dispersion step, it also includes pre-mixing and grinding steps.

3. The preparation process according to claim 2, characterized in that The pre-refining step specifically comprises the following steps: sequentially adding pigments and fillers into a double-cone mixing reactor, controlling the rotation speed at 10 r / min to 60 r / min, heating to 105°C to 165°C, mixing, reacting, and drying for 60 min to 180 min; sequentially adding film-forming substances into a stirring kettle, stirring and mixing uniformly; and continuously feeding the mixed film-forming substances and dried pigments and fillers into a twin-screw extruder with an aspect ratio of 20 to 50:

1. Pre-refining is carried out under mechanical extrusion pressure, frictionally heating to 70°C to 100°C, and the material residence time is 90 s to 180 s.

4. The preparation process according to claim 2, characterized in that The grinding step is specifically as follows: the material after pre-refining is sent into a spiral tube impregnator, the material moves downward in the spiral tube, the impregnation time is 2 hours to 4 hours, the material after impregnation enters a self-unloading roller mill, the material film thickness is adjusted to 30 μm to 100 μm, and reciprocating grinding is performed 2 to 3 times.

5. The preparation process according to claim 2, characterized in that: The dispersion step is specifically as follows: adding the ground material into a stirring and dispersing kettle, adding solvents in sequence, stirring and beating, shearing and dispersing at a line speed of 1000 m / min to 3000 m / min for 0.5 h to 1 h, controlling the temperature to be ≤70°C, and then redispersing through a homogenizing fluid pump to obtain a basic stock solution.

6. The preparation process according to claim 2, characterized in that: The prepolymerization step is specifically as follows: the dispersed material is fed into a prepolymerization reactor, cooled to ≤40°C, a stabilizer, a wetting dispersant, and a matting agent are added in sequence, and the reaction is maintained for 0.5 h to 1 h; a defoaming agent and a coupling agent are then added and the reaction is continued for 0.5 h to 1 h to obtain a prepolymerization reaction liquid.

7. The preparation process according to claim 2, characterized in that: The specific steps of the blending step are as follows: feeding the pre-polymerized material into a paint mixing kettle, adding an accelerating setting agent while stirring, stirring for 15 minutes to 30 minutes, and beating the material to make it uniform; the specific steps of the preparation step are as follows: testing the viscosity of the prepared material, and controlling the viscosity to be 80 mPa·s to 300 mPa·s by adding a solvent; the specific steps of the molding and packaging step are as follows: filtering, measuring, and packaging the prepared coating to obtain component A; compounding the curing agent and the catalyst, measuring, and packaging to obtain component B; adding component B to component A, stirring or shaking the mixture to make it uniform, and then using the mixture; Application is by spraying, brushing or roller.

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