Light-cured flame-retardant antistatic coating and preparation method thereof

Abstract

The invention provides a photocuring flame-retardant antistatic coating and a preparation method thereof, and the photocuring flame-retardant antistatic coating comprises the following components in parts by weight: 30-50 parts of epoxy resin, 15-25 parts of modified polyacrylate emulsion, 2-5 parts of a photoinitiator, 1-3 parts of a leveling agent, 1-3 parts of a defoaming agent, 3-6 parts of a flame retardant, 1.5-3.5 parts of an antistatic agent and 20-25 parts of a solvent. The modified polyacrylate emulsion is a hydrogenated rosin modified epoxy group-containing agglomerated acrylate emulsion; the flame retardant is a sarcandra glabra extract modified by hollow glass beads and nano attapulgite; the antistatic agent is formed by compounding 1-vinyl-2-pyrrolidone with graphene. The photocureable coating with good flame retardant and antistatic properties is prepared by the preparation method disclosed by the invention.

Description

Technical Field

[0001] This invention belongs to the field of coating preparation technology, specifically relating to a photocurable flame-retardant and antistatic coating and its preparation method. Background Technology

[0002] Coatings are materials used to protect, decorate, and impart specific functions to the surface of objects. They are widely used in construction, industry, automotive, shipbuilding, aerospace, and many other fields. The main components of coatings include film-forming substances (resins), pigments, solvents, and additives. These components work together to give coatings different properties and uses.

[0003] UV-curable coatings are coatings that cure rapidly through a chemical reaction triggered by ultraviolet (UV) light irradiation. Under UV light, the photoinitiator in the coating absorbs the UV radiation energy and splits into free radicals. The outer electrons of these free radicals jump, generating active centers in a very short time. These active centers then interact with the unsaturated groups in the resin, causing the double bonds in the UV-curable resin and reactive diluent molecules to break. This triggers polymerization, cross-linking, and grafting reactions in the prepolymer, curing it into a network polymer in a very short time.

[0004] UV-curable coatings transform from a liquid to a solid state within seconds, forming a film-forming substance. They cure quickly, and the cured film has high hardness, good wear resistance, and low energy consumption. Therefore, UV curing technology has been widely adopted on various substrates, especially in the fields of wood, metal, plastic, leather, paper, electronics, and chemicals.

[0005] Patent CN118389035A discloses a method for preparing a UV-curable waterborne coating, comprising mixing itaconic acid, tartaric acid, a polyol, a catalyst p-toluenesulfonic acid, and a polymerization inhibitor p-hydroxyanisole, and then reacting them at 150°C under a nitrogen atmosphere to obtain a prepolymer reaction solution; the polyol is one or a mixture of two of castor oil and isosorbide; adding a polycondensation catalyst dibutyltin dilaurate to the prepolymer reaction solution, and reacting it under vacuum at 150°C to obtain an itaconic acid-based unsaturated polyester; mixing the itaconic acid-based unsaturated polyester with deionized water, then stirring and heating to 40-60°C and adding triethylamine dropwise, followed by adding a photoinitiator and continuing stirring to obtain a UV-curable waterborne coating. The UV-curable waterborne coating obtained by this invention has excellent strength, toughness, is pollution-free, and environmentally friendly.

[0006] Patent CN119242109A provides a weather-resistant and waterproof UV-curable coating and its preparation method, including raw materials: mixed resin, photoinitiator, mixed filler, superhydrophobic additive, bio-based defoamer, modified polymer thickener, and plant-based solvent; the preparation method is as follows: weigh the mixed resin, photoinitiator, mixed filler, superhydrophobic additive, bio-based defoamer, modified polymer thickener, and plant-based solvent by weight for later use; mix the mixed resin and mixed filler evenly and then filter; add the photoinitiator, superhydrophobic additive, bio-based defoamer, modified polymer thickener, and plant-based solvent sequentially to the premix, mix and stir again, and filter to obtain the desired weather-resistant and waterproof UV-curable coating. The weather-resistant and waterproof UV-curable coating prepared by this invention has high waterproof and weather-resistant properties.

[0007] However, existing UV-curable coatings need to possess good antistatic and flame-retardant properties in certain working environments. Therefore, developing a UV-curable coating that combines good flame-retardant and antistatic effects is of practical significance. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing photocurable coatings in terms of flame retardancy and antistatic properties by providing a photocurable flame retardant and antistatic coating and its preparation method. The coating uses epoxy resin, modified polyacrylate emulsion, etc. as the matrix, hollow glass microspheres and nano-attapulgite modified coral extract as flame retardants, and 1-vinyl-2-pyrrolidone composite graphene as an antistatic agent to prepare a photocurable coating with good flame retardant and antistatic properties.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A photocurable flame-retardant and antistatic coating comprises, by weight, the following components: 30-50 parts epoxy resin, 15-25 parts modified polyacrylate emulsion, 2-5 parts photoinitiator, 1-3 parts leveling agent, 1-3 parts defoamer, 3-6 parts flame retardant, 1.5-3.5 parts antistatic agent, and 20-25 parts solvent.

[0011] Furthermore, the modified polyacrylate emulsion is a hydrogenated rosin-modified polyacrylate emulsion containing epoxy groups.

[0012] Furthermore, the flame retardant is hollow glass microspheres and nano-attapulgite modified coral extract.

[0013] Furthermore, the antistatic agent is 1-vinyl-2-pyrrolidone composite graphene.

[0014] Furthermore, the photoinitiator is one of benzophenone, dialkoxyacetophenone, or α-hydroxyalkyl acetophenone; the leveling agent is BYK333 or BYK349; the defoamer is tributyl phosphate; and the solvent is n-butyl ether.

[0015] A method for preparing a photocurable flame-retardant and antistatic coating includes the following steps:

[0016] S1: Prepare modified polyacrylate emulsion, flame retardant and antistatic agent respectively;

[0017] S2: Mix 30-50 parts epoxy resin, 15-25 parts modified polyacrylate emulsion, 2-5 parts photoinitiator, 1-3 parts leveling agent, 1-3 parts defoamer, 3-6 parts flame retardant, 1.5-3.5 parts antistatic agent and 20-25 parts solvent, and reflux at 160-170℃ for 40-60 minutes.

[0018] S3: Then raise the temperature to 180-190℃, control the vacuum degree to 0.03-0.05MPa, continue the reaction for 1-3 hours, and after cooling, the photocurable flame retardant and antistatic coating can be obtained.

[0019] Furthermore, the preparation process of the modified polyacrylate emulsion in step S1 is as follows: take 5-10 parts of butyl acrylate, 1-3 parts of hydroxyethyl acrylate, 10-20 parts of glycidyl methacrylate, 2-5 parts of hydrogenated rosin and 30-50 parts of purified water, mix them, and emulsify them at a temperature of 60-70℃ and a rate of 500-700 r / min for 20-40 min.

[0020] Furthermore, the preparation process of the flame retardant in step S1 is as follows: take 2-4 parts of hollow glass microspheres and 1-3 parts of nano-attapulgite and add them to 20-30 parts of coral grass extract, and stir the mixture at a rate of 300-400 r / min at a temperature of 40-50℃ for 50-70 min.

[0021] The nano-attapulgite is further processed by a blending solution. The specific preparation method is as follows:

[0022] S01: Heat-treat the nano-attapulgite at 210-230℃ for 10-15 min, then cool it to 55℃ at a rate of 2-5℃ / min and hold it at that temperature;

[0023] S02: Add 2-4 parts boron nitride agent and 1-3 parts silicon carbide to 5-8 parts of 5% (w / w) dopamine hydrochloride solution, then add 2-3 parts silane coupling agent KH550 and stir thoroughly to obtain a mixed solution;

[0024] The preparation method of boron nitride is as follows:

[0025] S021: Calcium sulfate whisker solution is obtained by thoroughly mixing 2-5 parts of calcium sulfate whiskers, 1-3 parts of yttrium oxide, 5-8 parts of sodium alginate solution with a mass fraction of 5%, and 2-3 parts of hydroxyapatite.

[0026] S022: Boron nitride and calcium sulfate whisker solution were ultrasonically treated at a weight ratio of 2:5, with an ultrasonic power of 350-400W for 1 hour. After ultrasonication, the solution was filtered and dried to obtain boron nitride agent.

[0027] S03: Mix the heat-insulating nano-attapulgite and the blending liquid at a weight ratio of 2:5, stirring at a speed of 450-500 r / min for 1 hour. After stirring, filter and dry.

[0028] Nano-attapulgite is heat-treated at 210-230℃ for 10-15 minutes, then cooled to 55℃ at a rate of 2-5℃ / min to optimize the interlayer spacing and improve the activity of the nano-attapulgite. Simultaneously, it is further improved by stirring in a blending solution. The boron nitride agent, silicon carbide, dopamine hydrochloride solution, and silane coupling agent KH550 in the blending solution are synergistically improved. The boron nitride agent is further optimized by co-forming specific raw materials such as calcium sulfate whiskers, yttrium oxide, and hydroxyapatite, resulting in better synergistic effects in the specific blending solution. This further optimizes the flame retardant and antistatic effects of the blended nano-attapulgite, improves the acid corrosion resistance and cold resistance of the system, and optimizes the product's performance efficiency.

[0029] Furthermore, the preparation process of the antistatic agent in step S1 is as follows: 1.5-2.5 parts of sheet graphene are placed in a proton irradiation chamber and irradiated for 30-50 minutes at an irradiation power of 500-700W; then 2-4 parts of 1-vinyl-2-pyrrolidone and 25-35 parts of sodium dodecyl sulfate solution are added and ultrasonically treated at a temperature of 50-60℃ for 25-35 minutes.

[0030] Hydrogenated rosin-modified epoxy-containing polyacrylate emulsion is a composite material that combines the advantages of a natural product (hydrogenated rosin) and a synthetic polymer (epoxy-containing polyacrylate). This combination aims to utilize the good adhesion and water resistance of hydrogenated rosin, along with the excellent mechanical properties and chemical stability of polyacrylate, and further enhances its crosslinking ability and environmental stability by introducing epoxy groups.

[0031] Hollow glass microspheres are hollow spherical particles made of borosilicate glass, characterized by their lightweight, high strength, and low thermal conductivity. They are spherical or nearly spherical with an internal cavity structure and a thin layer of borosilicate glass on the outer wall. Their diameter typically ranges from 10 to 300 micrometers, while the wall thickness is generally between 1 and 5 micrometers. Hollow glass microspheres have a low density, typically between 0.15 and 0.60 g / cm³.3 between.

[0032] Nano-attapulgite is a naturally occurring layered silicate mineral whose crystal structure consists of silicon-oxygen tetrahedra and aluminum-oxygen octahedra, exhibiting a unique needle-like or fibrous morphology; it also possesses high mechanical strength and chemical inertness.

[0033] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0034] This invention uses 1-vinyl-2-pyrrolidone composite graphene to prepare an antistatic agent, hollow glass microspheres and nano-attapulgite modified coral extract as flame retardants, and hydrogenated rosin modified epoxy group polyacrylate emulsion. These are added together with aromatic epoxy resin during the preparation of a UV-curable coating. Under the action of a UV photoinitiator, a cross-linking polymerization reaction can occur, thereby increasing the UV curing speed and reducing the UV curing time. The rigid benzene rings of the side chains form a spatial network structure through cross-linking polymerization, enhancing rigidity and strength, and improving the impact strength and flexural strength of the coating. It also exhibits good flame retardant and antistatic properties. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The raw materials used in this invention are as follows:

[0037] Epoxy resin (Nanjing Zhongchun Biotechnology Co., Ltd., Product Catalog 253); Butyl acrylate (Shandong Langcheng Chemical Co., Ltd., Product Catalog 92); Hydroxyethyl acrylate (Shandong Yonglida New Material Technology Co., Ltd., Product Catalog 299); Glycidyl methacrylate (Shandong Xinhe New Material Co., Ltd., Product Catalog 426); Hydrogenated rosin (Hubei Wande Chemical Co., Ltd., Product No. WD4721); Hollow glass microspheres (China Steel Group Maanshan Mining Institute New Material Technology Co., Ltd., Product Catalog 50); Nano-attapulgite (Shanghai Jieshikai Biotechnology Co., Ltd., Product Catalog 432); Coralwort extract (Wuhan Pushida Biotechnology Co., Ltd., Product Catalog 3190); 1-Vinyl-2-pyrrolidone (Xinmaiqi Materials Co., Ltd., Product Catalog 51).

[0038] Example 1

[0039] This embodiment provides a method for preparing a photocurable flame-retardant and antistatic coating, comprising the following steps:

[0040] S1: Take 5g butyl acrylate, 1g hydroxyethyl acrylate, 10g glycidyl methacrylate, 2g hydrogenated rosin and 30g purified water, mix them, and emulsify them at 60℃ and 500r / min for 20min to obtain modified polyacrylate emulsion.

[0041] Take 2g of hollow glass microspheres and 1g of nano-attapulgite and add them to 20g of coral extract. Stir the mixture at 300r / min for 50min at 40℃ to obtain a flame retardant.

[0042] 1.5g of sheet graphene was placed in a proton irradiation chamber and irradiated for 30min at an irradiation power of 500W; then 2g of 1-vinyl-2-pyrrolidone and 25g of sodium dodecyl sulfate solution were added and ultrasonically treated for 25min at a temperature of 50℃ and a power of 350W to obtain an antistatic agent.

[0043] S2: Take 30g epoxy resin, 15g modified polyacrylate emulsion, 2g photoinitiator benzophenone, 1g leveling agent BYK333, 1g defoamer tributyl phosphate, 3g flame retardant, 1.5g antistatic agent and 20g solvent n-butyl ether, mix them, heat to 160℃ and reflux for 40min.

[0044] S3: Then raise the temperature to 180℃, control the vacuum degree to 0.03MPa, continue the reaction for 1 hour, and after cooling, the photocurable flame retardant and antistatic coating can be obtained.

[0045] Example 2

[0046] This embodiment provides a method for preparing a photocurable flame-retardant and antistatic coating, comprising the following steps:

[0047] S1: Take 10g butyl acrylate, 3g hydroxyethyl acrylate, 20g glycidyl methacrylate, 5g hydrogenated rosin and 50g purified water, mix them, and emulsify them at 70℃ and 700r / min for 40min to obtain modified polyacrylate emulsion.

[0048] Take 4g of hollow glass microspheres and 3g of nano-attapulgite and add them to 30g of coral grass extract. Stir the mixture at 400r / min for 70min at 50℃ to obtain a flame retardant.

[0049] 2.5g of sheet graphene was placed in a proton irradiation chamber and irradiated for 50 minutes at an irradiation power of 700W; then 4g of 1-vinyl-2-pyrrolidone and 35g of sodium dodecyl sulfate solution were added and ultrasonically treated for 35 minutes at a temperature of 60℃ and a power of 500W to obtain an antistatic agent.

[0050] S2: Take 50g epoxy resin, 25g modified polyacrylate emulsion, 5g photoinitiator dialkoxyacetophenone, 3g leveling agent BYK349, 3g defoamer tributyl phosphate, 6g flame retardant, 3.5g antistatic agent and 25g solvent n-butyl ether, mix them, heat to 170℃ and reflux for 60min.

[0051] S3: Then raise the temperature to 190℃, control the vacuum degree to 0.05MPa, continue the reaction for 3 hours, and after cooling, the photocurable flame retardant and antistatic coating can be obtained.

[0052] Example 3

[0053] This embodiment provides a method for preparing a photocurable flame-retardant and antistatic coating, comprising the following steps:

[0054] S1: Take 8g butyl acrylate, 2g hydroxyethyl acrylate, 15g glycidyl methacrylate, 3g hydrogenated rosin and 45g purified water, mix them, and emulsify them at 65℃ and 600r / min for 30min to obtain modified polyacrylate emulsion.

[0055] Take 3g of hollow glass microspheres and 2g of nano-attapulgite and add them to 25g of coral extract. Stir the mixture at 350r / min for 60min at 45℃ to obtain a flame retardant.

[0056] 2g of sheet graphene was placed in a proton irradiation chamber and irradiated for 45 minutes at an irradiation power of 600W; then 3g of 1-vinyl-2-pyrrolidone and 30g of sodium dodecyl sulfate solution were added and ultrasonically treated at 55℃ for 30 minutes to obtain an antistatic agent.

[0057] S2: Take 45g epoxy resin, 20g modified polyacrylate emulsion, 4g photoinitiator α-hydroxyalkyl phenyl ketone, 2g leveling agent BYK333, 2g defoamer tributyl phosphate, 4g flame retardant, 3g antistatic agent and 22g solvent n-butyl ether, mix them, heat to 165℃ and reflux for 55min.

[0058] S3: Then raise the temperature to 185℃, control the vacuum degree to 0.045MPa, continue the reaction for 2.5h, and after cooling, the photocurable flame retardant and antistatic coating can be obtained.

[0059] Example 4: Based on Example 3, the nano-attapulgite was further prepared by a blending solution. The specific preparation method is as follows:

[0060] S01: The nano-attapulgite is first heat-treated at 220℃ for 12 min, and then cooled to 55℃ at a rate of 3.5℃ / min and held at that temperature;

[0061] S02: Add 3 parts boron nitride agent and 2 parts silicon carbide to 6.5 parts of 5% (w / w) dopamine hydrochloride solution, then add 2.5 parts silane coupling agent KH550, and stir thoroughly to obtain a mixed solution;

[0062] The preparation method of boron nitride is as follows:

[0063] S021: 3.5 parts of calcium sulfate whiskers, 2 parts of yttrium oxide, 6.5 parts of sodium alginate solution with a mass fraction of 5% and 2.5 parts of hydroxyapatite are thoroughly mixed to obtain calcium sulfate whisker solution;

[0064] S022: Boron nitride and calcium sulfate whisker solution were ultrasonically treated at a weight ratio of 2:5, ultrasonic power 375W, ultrasonic for 1 hour, after ultrasonication was completed, filtered and dried to obtain boron nitride agent.

[0065] S03: Mix the heat-insulating nano-attapulgite and the blending liquid at a weight ratio of 2:5, stirring at a speed of 470 r / min for 1 hour. After stirring, filter and dry.

[0066] Comparative Example 1

[0067] The difference between this comparative example and Example 1 is that no modified polyacrylate emulsion is added in step S1, while the other steps are the same.

[0068] Comparative Example 2

[0069] The difference between this comparative example and Example 1 is that hollow glass microspheres and nano-attapulgite are not added in step S1, while the other steps are the same.

[0070] Comparative Example 3

[0071] The difference between this comparative example and Example 1 is that 1-vinyl-2-pyrrolidone is not added in step S1, while the other steps are the same.

[0072] Comparative Example 4

[0073] The difference between this comparative example and Example 1 is that sheet graphene is not added in step S1, while the other steps are the same.

[0074] Comparative Example 5

[0075] The difference between this comparative example and Example 1 is that the vacuum degree in step S3 is 0.1 MPa, while the other steps are the same.

[0076] Performance testing:

[0077] The photocurable flame-retardant and antistatic coatings prepared in each embodiment and comparative example were coated on PVC boards with a coating thickness of 5 μm and dried at 65°C for 10 min. The coatings were then introduced into the light source area at a speed of 2 m / min, accumulating a radiation of 500 mJ / cm². 2PVC boards with coatings were obtained. The volume resistivity of the coating was tested according to GB / T15662-1995; the combustion test was performed on the coating according to GB / T 2408-2008; and the surface hardness was measured according to HG / T2006-2006. The results are shown in the table below.

[0078] Table 1 Performance Test Results

[0079]

[0080]

[0081] The performance test results above show that the photocurable flame-retardant and antistatic coatings prepared in Examples 1-4 have excellent hardness, flame retardancy, and antistatic properties; in particular, the comprehensive performance of Example 4 is the most outstanding. The performance of the nano-attapulgite in Example 4 was further improved after being treated with a blending liquid. Comparative Examples 1-5, however, did not employ the necessary technical solutions, resulting in significantly worse performance than the examples in the corresponding tests. The above experimental results further demonstrate the importance of the technical solutions defined in this invention for its technical effect.

[0082] The products from Examples 1-4 were placed under 2% hydrochloric acid mist for 12 hours, and then placed at -5°C for 12 hours. The corrosion resistance and cold resistance stability of the products were tested as follows:

[0083] test hardness Surface intrinsic resistivity Ω Oxygen Index Example 1 1H <![CDATA[2.3×10 4 ]]> 30 Example 2 1H <![CDATA[2.0×10 4 ]]> 31 Example 3 1H <![CDATA[1.9×10 4 ]]> 33 Example 4 1H <![CDATA[1.3×10 4 ]]> 40

[0084] The products in Examples 1-4 showed significant performance stability under acidic and cold conditions, with the product in Example 4 exhibiting the most significant performance stability.

[0085] To further investigate the effect of nano-attapulgite being blended with a blending solution on product performance, the following tests were conducted:

[0086] Comparative Experiment 1

[0087] The difference between this comparative example and Example 4 is that boron nitride was not added to the mixture.

[0088] Comparative Experiment 2

[0089] The difference between this comparative example and Example 4 is that calcium sulfate whisker solution was not added during the preparation of the boron nitride agent.

[0090] Comparative Experiment 3

[0091] The difference between this comparative example and Example 4 is that hydroxyapatite and yttrium oxide were not added to the calcium sulfate whisker solution.

[0092] Comparative Experiment 4

[0093] The difference between this comparative example and Example 4 is that no silicon carbide and silane coupling agent were added to the mixture.

[0094] Based on the product's corrosion resistance and cold resistance stability tests, the following tests were conducted:

[0095]

[0096] The performance tests above show that the performance of the products deteriorated to varying degrees when boron nitride was not added to the blending solution, calcium sulfate whisker solution was not added during the preparation of the boron nitride, hydroxyapatite and yttrium oxide were not added to the calcium sulfate whisker solution, and silicon carbide and silane coupling agent were not added to the blending solution. Only the nano-attapulgite clay blended with the blending solution obtained by the method of this invention showed the most significant performance improvement. Other methods were not as effective as the method of this invention.

[0097] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A photocurable flame-retardant and antistatic coating, characterized in that, By weight, it comprises the following components: 30-50 parts epoxy resin, 15-25 parts modified polyacrylate emulsion, 2-5 parts photoinitiator, 1-3 parts leveling agent, 1-3 parts defoamer, 3-6 parts flame retardant, 1.5-3.5 parts antistatic agent, and 20-25 parts solvent.

2. The photocurable flame-retardant and antistatic coating according to claim 1, characterized in that, The modified polyacrylate emulsion is a hydrogenated rosin-modified polyacrylate emulsion containing epoxy groups.

3. The photocurable flame-retardant and antistatic coating according to claim 1, characterized in that, The flame retardant is hollow glass microspheres and nano-attapulgite modified coral extract.

4. The photocurable flame-retardant and antistatic coating according to claim 1, characterized in that, The antistatic agent is 1-vinyl-2-pyrrolidone composite graphene.

5. The photocurable flame-retardant and antistatic coating according to claim 1, characterized in that, The photoinitiator is one of benzophenone, dialkoxyacetophenone, or α-hydroxyalkylacetophenone.

6. The photocurable flame-retardant and antistatic coating according to claim 1, characterized in that, The leveling agent is BYK333 or BYK349; the defoamer is tributyl phosphate; and the solvent is n-butyl ether.

7. A method for preparing a photocurable flame-retardant and antistatic coating, characterized in that, Includes the following steps: S1: Prepare modified polyacrylate emulsion, flame retardant and antistatic agent respectively; S2: Mix 30-50 parts epoxy resin, 15-25 parts modified polyacrylate emulsion, 2-5 parts photoinitiator, 1-3 parts leveling agent, 1-3 parts defoamer, 3-6 parts flame retardant, 1.5-3.5 parts antistatic agent and 20-25 parts solvent, and reflux at 160-170℃ for 40-60 minutes. S3: Then raise the temperature to 180-190℃, control the vacuum degree to 0.03-0.05MPa, continue the reaction for 1-3 hours, and after cooling, the photocurable flame retardant and antistatic coating can be obtained.

8. The method for preparing a photocurable flame-retardant and antistatic coating according to claim 7, characterized in that, The preparation process of the modified polyacrylate emulsion in step S1 is as follows: take 5-10 parts of butyl acrylate, 1-3 parts of hydroxyethyl acrylate, 10-20 parts of glycidyl methacrylate, 2-5 parts of hydrogenated rosin and 30-50 parts of purified water, mix them, and emulsify them at a temperature of 60-70℃ and a rate of 500-700 r / min for 20-40 min.

9. The method for preparing a photocurable flame-retardant and antistatic coating according to claim 7, characterized in that, The preparation process of the flame retardant in step S1 is as follows: take 2-4 parts of hollow glass microspheres and 1-3 parts of nano-attapulgite and add them to 20-30 parts of coral grass extract, and stir the mixture at a rate of 300-400 r / min at a temperature of 40-50℃ for 50-70 min. The nano-attapulgite is further processed by a blending solution. The specific preparation method is as follows: S01: Heat-treat the nano-attapulgite at 210-230℃ for 10-15 min, then cool it to 55℃ at a rate of 2-5℃ / min and hold it at that temperature; S02: Add 2-4 parts boron nitride agent and 1-3 parts silicon carbide to 5-8 parts of 5% (w / w) dopamine hydrochloride solution, then add 2-3 parts silane coupling agent KH550 and stir thoroughly to obtain a mixed solution; The preparation method of boron nitride is as follows: S021: Calcium sulfate whisker solution is obtained by thoroughly mixing 2-5 parts of calcium sulfate whiskers, 1-3 parts of yttrium oxide, 5-8 parts of sodium alginate solution with a mass fraction of 5%, and 2-3 parts of hydroxyapatite. S022: Boron nitride and calcium sulfate whisker solution were ultrasonically treated at a weight ratio of 2:5, with an ultrasonic power of 350-400W for 1 hour. After ultrasonication, the solution was filtered and dried to obtain boron nitride agent. S03: Mix the heat-insulating nano-attapulgite and the blending liquid at a weight ratio of 2:5, stirring at a speed of 450-500 r / min for 1 hour. After stirring, filter and dry.

10. The method for preparing a photocurable flame-retardant and antistatic coating according to claim 7, characterized in that, The preparation process of the antistatic agent in step S1 is as follows: 1.5-2.5 parts of sheet graphene are placed in a proton irradiation chamber and irradiated for 30-50 minutes at an irradiation power of 500-700W; then 2-4 parts of 1-vinyl-2-pyrrolidone and 25-35 parts of sodium dodecyl sulfate solution are added and ultrasonically treated at a temperature of 50-60℃ for 25-35 minutes.

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