Waterborne acrylate antistatic coating as well as preparation method and application thereof

Abstract

The invention discloses a water-based acrylate antistatic coating as well as a preparation method and application thereof. Comprising the following steps: 1, mixing styrene, methyl methacrylate, butyl acrylate, ethyl acrylate, acrylic acid, lauryl sodium sulfate, a composite filler and deionized water, and carrying out high-speed shearing and pre-emulsification to form a monomer emulsion; 2, sodium bicarbonate, deionized water and ammonium persulfate are mixed, the temperature is increased to 75-80 DEG C, the monomer emulsion is slowly dropwise added, heat preservation is conducted for 1-2 h after dropwise adding is completed, the temperature is reduced to 40-50 DEG C, the pH is adjusted to 7-8, deionized water is added according to the volume ratio of 1: 1, and the waterborne acrylate antistatic coating is obtained. The preparation method has the beneficial effects that based on monomers such as styrene and methyl methacrylate, a composite filler is introduced to participate in emulsion polymerization, so that the waterborne acrylate antistatic coating is obtained; according to the method, the antistatic performance of the material is remarkably improved, and the mechanical strength and flame retardance of the material are effectively enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and specifically relates to an aqueous acrylate antistatic coating, a preparation method thereof, and an application thereof. Background Art

[0002] In recent years, with the development of fields such as the electronics industry and aerospace, the demand for antistatic coatings has been increasing day by day. Traditional antistatic coatings usually achieve antistatic performance by adding conductive fillers (such as carbon nanotubes, metal particles, or conductive polymers), but these methods have obvious defects. For example, although carbon nanotubes have excellent conductivity, they are prone to agglomeration and poor dispersibility, which affect the uniformity and stability of the coating; metal fillers have high costs and large densities, and are prone to sedimentation, resulting in uneven coating performance. In addition, the mechanical strength and flame retardant performance of existing aqueous acrylate coatings are often insufficient and difficult to meet the requirements of high-end application scenarios.

[0003] Currently, some studies have attempted to improve the comprehensive performance of coatings through composite modification, but most of the solutions still have limitations. For example, it is difficult to achieve a stable conductive network by simply physically blending fillers, and the durability of the antistatic effect is poor; while introducing a flame retardant may damage the mechanical properties or environmental friendliness of the coating. In addition, the surface modification process of fillers in the existing technology is complex, or the compatibility with the matrix is not good, resulting in easy cracking of the coating and a decrease in adhesion.

[0004] Therefore, to solve the above problems, the present invention provides an aqueous acrylate antistatic coating, a preparation method thereof, and an application thereof. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an aqueous acrylate antistatic coating, a preparation method thereof, and an application thereof.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A preparation method of an aqueous acrylate antistatic coating includes the following steps:

[0008] Step 1: Mix styrene, methyl methacrylate, butyl acrylate, ethyl acrylate, acrylic acid, sodium dodecyl sulfate, composite filler, and deionized water, and perform high-speed shear pre-emulsification to form a monomer emulsion;

[0009] Step 2: Mix sodium bicarbonate, deionized water, and ammonium persulfate, raise the temperature to 75 - 80 °C, slowly dropwise add the monomer emulsion, after the dropping is completed, keep warm for 1 - 2 h, cool down to 40 - 50 °C, adjust the pH to 7 - 8, and add deionized water according to a volume ratio of 1:1 to obtain the aqueous acrylate antistatic coating.

[0010] Preferably, the raw materials of the aqueous acrylate antistatic coating include the following components by weight: 25-30 parts of styrene, 20-25 parts of methyl methacrylate, 30-35 parts of butyl acrylate, 10-15 parts of ethyl acrylate, 2-5 parts of acrylic acid, 1-2 parts of sodium dodecyl sulfate, 5-10 parts of composite filler, 0.1-0.3 parts of sodium bicarbonate, 0.5-1 part of ammonium persulfate, and 185-200 parts of deionized water.

[0011] Preferably, the preparation process of the composite filler is as follows:

[0012] A1: Disperse nano-silica in tetrahydrofuran, add γ-aminopropyltriethoxysilane, raise the temperature to 70-80 °C under a protective atmosphere, react for 3-4 h, then wash the product and dry it under vacuum to obtain amino-functionalized silica.

[0013] A2: Add the amino-functionalized silica, 2,5-dimethoxybenzene-1,4-dicarboxaldehyde, and 1,3,5-tris(4-aminophenyl)benzene to a mixed solvent of o-dichlorobenzene and n-butanol, add acetic acid, raise the temperature to 120-130 °C, react for 48 h, and centrifuge, wash, and dry the product to obtain pre-coated silica.

[0014] A3: Add the pre-coated silica to dimethylformamide, ultrasonically disperse for 20-30 min, add a modifier, raise the temperature to 40-50 °C, react for 2-3 h to obtain modified pre-coated silica.

[0015] A4: Add the modified pre-coated silica and carboxylated carbon nanotubes to dimethylformamide, add 1-ethyl-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, raise the temperature to 70-80 °C, ultrasonically mix for 6-8 h, filter and dry to obtain the composite filler.

[0016] In the scheme, first, under acidic conditions, the amino group of 1,3,5-tris(4-aminophenyl)benzene reacts with the aldehyde group in 2,5-dimethoxybenzene-1,4-dicarboxaldehyde, and at the same time, the amino group on the surface of the amino-functionalized silica also participates in the reaction to form a core-shell structure composite material. Subsequently, the remaining amino groups further react with the aldehyde groups in the modifier to obtain modified pre-coated silica.

[0017] Preferably, the raw materials of the amino-functionalized silica include the following components by weight: 0.5-1 part of nano-silica, 100-120 parts of tetrahydrofuran, and 2-3 parts of γ-aminopropyltriethoxysilane.

[0018] The pre-coated silica raw material includes the following components: by weight, 4-5 parts of aminated silica, 2-3 parts of 2,5-dimethoxybenzene-1,4-dicarbaldehyde, 3-4 parts of 1,3,5-tris(4-aminophenyl)benzene, 180-200 parts of o-dichlorobenzene, 120-150 parts of n-butanol, and 70-80 parts of acetic acid.

[0019] The modified pre-coated silica raw material includes the following components: by weight, 10-12 parts of pre-coated silica, 100-120 parts of dimethylformamide, and 5-8 parts of modifier.

[0020] More preferably, the composite filler raw material includes the following components: by weight, 5-6 parts of pre-coated silica, 10-12 parts of carboxylated carbon nanotubes, and 150-180 parts of dimethylformamide.

[0021] More preferably, the preparation process of the modifier is as follows:

[0022] S1: Under a protective atmosphere, diphenylurea, dichlorophenylphosphine, and aluminum chloride are mixed, the temperature is raised to 30-40 °C, and the reaction is carried out for 10-12 h. After cooling to room temperature, hydrolysis is carried out using a hydrochloric acid solution, extraction, washing, and vacuum distillation are carried out to obtain intermediate A;

[0023] S2: 3-allylsalicylaldehyde, triethylamine, and ethyl acetate are stirred and mixed, intermediate A is added, the temperature is raised to 60-70 °C, and the reaction is carried out for 3-4 h. After cooling to room temperature, filtration, washing, and drying are carried out to obtain the modifier.

[0024] In the scheme, under the catalysis of aluminum chloride (Lewis acid), dichlorophenylphosphine acylates the aromatic ring of diphenylurea to generate intermediate A containing a phosphonate ester structure. The specific reaction process is as follows:

[0025]

[0026] In the scheme, in the presence of triethylamine, the phenolic hydroxyl group in 3-allylsalicylaldehyde is deprotonated to generate a nucleophile, which reacts with intermediate A. The structural formula of the obtained modifier is as follows:

[0027]

[0028] More preferably, the intermediate A raw material includes the following substances: by weight, 21-22 parts of diphenylurea, 35-40 parts of dichlorophenylphosphine, and 2-3 parts of aluminum chloride;

[0029] The modifier raw material includes the following substances: by weight, 49-50 parts of intermediate A, 32-40 parts of 3-allylsalicylaldehyde, 12-15 parts of triethylamine, and 350-400 parts of ethyl acetate.

[0030] Advantages of the present invention:

[0031] Based on monomers such as styrene and methyl methacrylate, the present invention obtains a waterborne acrylate antistatic coating by introducing composite fillers to participate in emulsion polymerization. This method not only significantly improves the antistatic performance of the material, but also effectively enhances its mechanical strength and flame retardancy. Specifically as follows:

[0032] First: In the solution, by coating covalent organic frameworks on the surface of silica to form a core-shell structure; its high specific surface area and rigid structure effectively improve the tensile strength of the coating. At the same time, through the further combination of the aldehyde groups on the surface of the modifier and the amino groups contained on the surface of the covalent organic framework, phosphorus- and nitrogen-containing functional groups are introduced, significantly improving the flame retardancy of the material. Moreover, the nano-silica coated with covalent organic frameworks has excellent thermal stability and barrier properties, and can form a physical barrier during combustion to prevent the transfer of heat and oxygen, and cooperate with the phosphorus-nitrogen structure to achieve double flame retardancy in the gas phase and condensed phase;

[0033] Second: In the solution, some carboxylated carbon nanotubes are covalently bonded to the remaining amino groups on the surface of silica coated with covalent organic framework (COF) through the EDC / NHS activation system, and the rest are fixed on the surface or pores of the COF by hydrogen bonding and van der Waals forces. This design realizes the multi-point anchoring of carbon nanotubes: when the modified pre-coated silica is in direct contact with carbon nanotubes, electrons can directly transition through chemical bonds (such as amide bonds); when the distance between the two is large, the π-conjugated structure (such as imine bonds) in the COF skeleton can assist electron tunneling at the nanoscale through the superexchange effect. This electron transport mechanism combining covalent bond binding and π-conjugation significantly improves the antistatic performance of the composite material. Specific embodiments

[0034] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0035] Example 1: A preparation method of a waterborne acrylate antistatic coating, comprising the following steps:

[0036] Step 1: Mix 5 parts of styrene, 20 parts of methyl methacrylate, 30 parts of butyl acrylate, 10 parts of ethyl acrylate, 2 parts of acrylic acid, 1 part of sodium dodecyl sulfate, 5 parts of composite filler, and 50 parts of deionized water, and perform high-speed shear pre-emulsification to form a monomer emulsion;

[0037] Step 2: Mix 0.1 part of sodium bicarbonate, 20 parts of deionized water, and 0.5 part of ammonium persulfate, raise the temperature to 75 °C, slowly dropwise add the monomer emulsion, keep the temperature for 1 h after the addition is completed, cool down to 40 °C, adjust the pH to 7, and add deionized water in a volume ratio of 1:1 to obtain a waterborne acrylate antistatic coating;

[0038] Among them, the preparation process of the composite filler is as follows:

[0039] A1: Disperse 0.5 part of nano-silica in 100 parts of tetrahydrofuran, add 2 parts of γ-aminopropyltriethoxysilane, under a protective atmosphere, raise the temperature to 70 °C, react for 3 h, then wash and vacuum dry the product to obtain amino-functionalized silica;

[0040] A2: Add 4 parts of amino-functionalized silica, 2 parts of 2,5-dimethoxybenzene-1,4-dicarboxaldehyde, and 3 parts of 1,3,5-tris(4-aminophenyl)benzene to a mixed solvent of 180 parts of ortho-dichlorobenzene and 120 parts of n-butanol, add 70 parts of acetic acid, raise the temperature to 120 °C, react for 48 h, and centrifuge, wash, and dry the product to obtain pre-coated silica;

[0041] A3: Add 10 parts of pre-coated silica to 100 parts of dimethylformamide, ultrasonically disperse for 20 min, add 5 parts of the modifier, raise the temperature to 40 °C, react for 2 h to obtain modified pre-coated silica;

[0042] A4: Add 5 parts of modified pre-coated silica and 10 parts of carboxylated carbon nanotubes to dimethylformamide, add 0.1 part of 1-ethyl-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 0.1 part of N-hydroxysuccinimide, raise the temperature to 70 °C, ultrasonically mix for 6 h, filter and dry to obtain the composite filler;

[0043] Among them, the preparation process of the modifier is as follows:

[0044] S1: Mix 21 parts of diphenylurea and 35 parts of dichlorophenylphosphine, under a nitrogen atmosphere, add 2 parts of aluminum chloride, raise the temperature to 30 °C, react for 10 h, cool to room temperature, hydrolyze with a 10% (by volume) hydrochloric acid solution, extract, wash, and vacuum distill to obtain intermediate A;

[0045] S2: Add 32 parts of 3-allylsalicylaldehyde, 12 parts of triethylamine, and 350 parts of ethyl acetate to a three-necked flask, stir and mix, add 49 parts of intermediate A, raise the temperature to 60 °C, react for 3 h, cool to room temperature, filter, wash, and dry to obtain the modifier.

[0046] Example 2: A preparation method of a waterborne acrylate antistatic coating, comprising the following steps:

[0047] Step 1: Mix 30 parts of styrene, 25 parts of methyl methacrylate, 35 parts of butyl acrylate, 15 parts of ethyl acrylate, 5 parts of acrylic acid, 2 parts of sodium dodecyl sulfate, 10 parts of composite filler, and 70 parts of deionized water, and perform high-speed shear pre-emulsification to form a monomer emulsion;

[0048] Step 2: Mix 0.3 parts of sodium bicarbonate, 30 parts of deionized water, and 1 part of ammonium persulfate, raise the temperature to 80 °C, slowly dropwise add the monomer emulsion, keep warm for 2 h after the dropping is completed, cool down to 50 °C, adjust the pH to 7, and add deionized water in a volume ratio of 1:1 to obtain an aqueous acrylate antistatic coating;

[0049] Among them, the preparation process of the composite filler is as follows:

[0050] A1: Disperse 1 part of nano-silica in 120 parts of tetrahydrofuran, add 3 parts of γ-aminopropyltriethoxysilane, under a protective atmosphere, raise the temperature to 80 °C, react for 4 h, then wash the product and dry it under vacuum to obtain amino-functionalized silica;

[0051] A2: Add 5 parts of amino-functionalized silica, 3 parts of 2,5-dimethoxybenzene-1,4-dicarboxaldehyde, and 4 parts of 1,3,5-tris(4-aminophenyl)benzene to a mixed solvent of 200 parts of o-dichlorobenzene and 150 parts of n-butanol, add 80 parts of acetic acid, raise the temperature to 130 °C, react for 48 h, and centrifuge, wash, and dry the product to obtain pre-coated silica;

[0052] A3: Add 12 parts of pre-coated silica to 120 parts of dimethylformamide, ultrasonically disperse for 30 min, add 8 parts of modifier, raise the temperature to 50 °C, react for 3 h to obtain modified pre-coated silica;

[0053] A4: Add 6 parts of modified pre-coated silica and 12 parts of carboxylated carbon nanotubes to dimethylformamide, add 0.2 parts of 1-ethyl-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 0.2 parts of N-hydroxysuccinimide, raise the temperature to 80 °C, ultrasonically mix for 8 h, filter and dry to obtain the composite filler;

[0054] Among them, the preparation process of the modifier is as follows:

[0055] S1: Mix 22 parts of diphenylurea and 40 parts of dichlorophenylphosphine, under a nitrogen atmosphere, add 3 parts of aluminum chloride, raise the temperature to 40 °C, react for 12 h, cool to room temperature, perform hydrolysis with a 10% volume ratio of hydrochloric acid solution, extract, wash, and vacuum distill to obtain intermediate A;

[0056] S2: Add 40 parts of 3 - allylsalicylaldehyde, 15 parts of triethylamine, and 400 parts of ethyl acetate into a three - necked flask, stir and mix them, add 50 parts of intermediate A, raise the temperature to 70 °C, react for 4 h, after cooling to room temperature, filter, wash, and dry to obtain the modifier.

[0057] Example 3: A preparation method of an aqueous acrylate antistatic coating, comprising the following steps:

[0058] Step 1: Mix 17.5 parts of styrene, 22.5 parts of methyl methacrylate, 32.5 parts of butyl acrylate, 12.5 parts of ethyl acrylate, 3.5 parts of acrylic acid, 1.5 parts of sodium dodecyl sulfate, 7.5 parts of composite filler, and 60 parts of deionized water, and perform high - speed shear pre - emulsification to form a monomer emulsion;

[0059] Step 2: Mix 0.2 part of sodium bicarbonate, 25 parts of deionized water, and 0.75 part of ammonium persulfate, raise the temperature to 77.5 °C, slowly dropwise add the monomer emulsion, after the dropping is completed, keep the temperature for 1.5 h, cool down to 45 °C, adjust the pH to 7, add deionized water in a volume ratio of 1:1 to obtain the aqueous acrylate antistatic coating;

[0060] Among them, the preparation process of the composite filler is as follows:

[0061] A1: Disperse 0.75 part of nano - silica in 110 parts of tetrahydrofuran, add 2.5 parts of γ - aminopropyltriethoxysilane, under a protective atmosphere, raise the temperature to 75 °C, react for 3.5 h, then wash and vacuum - dry the product to obtain amino - functionalized silica;

[0062] A2: Add 4.5 parts of amino - functionalized silica, 2.5 parts of 2,5 - dimethoxybenzene - 1,4 - dialdehyde, and 3.5 parts of 1,3,5 - tris(4 - aminophenyl)benzene into a mixed solvent of 190 parts of ortho - dichlorobenzene and 135 parts of n - butanol, add 75 parts of acetic acid, raise the temperature to 125 °C, react for 48 h, and centrifuge, wash, and dry the product to obtain pre - coated silica;

[0063] A3: Add 11 parts of pre - coated silica into 110 parts of dimethylformamide, ultrasonically disperse for 25 min, add 6.5 parts of the modifier, raise the temperature to 45 °C, react for 2.5 h to obtain modified pre - coated silica;

[0064] A4: Add 5.5 parts of modified pre - coated silica and 11 parts of carboxylated carbon nanotubes into dimethylformamide, add 0.15 part of 1 - ethyl - (3 - dimethylaminopropyl) - 3 - ethylcarbodiimide hydrochloride and 0.15 part of N - hydroxysuccinimide, raise the temperature to 75 °C, ultrasonically mix for 7 h, filter and dry to obtain the composite filler;

[0065] Wherein, the preparation process of the modifier is:

[0066] S1: 21.5 parts of diphenylurea and 38 parts of dichlorophenylphosphine were mixed, 2.5 parts of aluminum chloride were added under nitrogen atmosphere, the temperature was raised to 35°C, the reaction was carried out for 11 hours, the mixture was cooled to room temperature, hydrolyzed with 10% by volume hydrochloric acid solution, extracted, washed, and vacuum distilled to obtain intermediate A;

[0067] S2: Add 38 parts of 3-allyl salicylaldehyde, 13 parts of triethylamine and 380 parts of ethyl acetate into a three-necked flask, stir and mix, add 49.5 parts of intermediate A, increase the temperature to 65°C, react for 3.5 hours, cool to room temperature, filter, wash and dry to obtain a modifier.

[0068] Comparative Example 1: No composite filler was added during the preparation process, and the rest was the same as Example 3, as follows:

[0069] Step 1: 17.5 parts of styrene, 22.5 parts of methyl methacrylate, 32.5 parts of butyl acrylate, 12.5 parts of ethyl acrylate, 3.5 parts of acrylic acid, 1.5 parts of sodium lauryl sulfate, and 60 parts of deionized water are mixed and pre-emulsified by high-speed shearing to form a monomer emulsion;

[0070] Step 2: Mix 0.2 parts of sodium bicarbonate, 25 parts of deionized water, and 0.75 parts of ammonium persulfate, raise the temperature to 77.5°C, slowly drop the monomer emulsion, keep warm for 1.5 hours after the addition is completed, cool to 45°C, adjust the pH to 7, add deionized water at a volume ratio of 1:1, and obtain a water-based acrylic antistatic coating.

[0071] Comparative Example 2: Only carbon nanotubes were added during the preparation process, and the rest was the same as in Example 3, as follows:

[0072] Step 1: 17.5 parts of styrene, 22.5 parts of methyl methacrylate, 32.5 parts of butyl acrylate, 12.5 parts of ethyl acrylate, 3.5 parts of acrylic acid, 1.5 parts of sodium dodecyl sulfate, 7.5 parts of carbon nanotubes, and 60 parts of deionized water are mixed and pre-emulsified at high speed shear to form a monomer emulsion;

[0073] Step 2: Mix 0.2 parts of sodium bicarbonate, 25 parts of deionized water, and 0.75 parts of ammonium persulfate, raise the temperature to 77.5°C, slowly drop the monomer emulsion, keep warm for 1.5 hours after the addition is completed, cool to 45°C, adjust the pH to 7, add deionized water at a volume ratio of 1:1, and obtain a water-based acrylic antistatic coating.

[0074] Testing: The water-based acrylic antistatic coating obtained in the examples and comparative examples was uniformly coated on the surface of the pretreated tinplate using a coater, and after curing, a performance test was performed.

[0075] (1) Prepare specimens (100×10×2 mm) of standard size from the resin films obtained in the examples and comparative examples, and conduct tests at a tensile speed of 6 mm / min, and record the tensile strength;

[0076] (2) Determine the limiting oxygen index (LOI) of the resin films obtained in the examples and comparative examples according to ASTM D2863;

[0077] (3) Measure the hardness of the examples and comparative examples according to GB / T 6739-2022;

[0078] (4) Measure the resistivity of the examples and comparative examples according to GB / T 3048.5-2007; The data obtained are shown in the following table:

[0079]

[0080] Table 1

[0081] Conclusion: The waterborne acrylate antistatic coating prepared by the present invention by introducing composite fillers significantly improves the antistatic performance, mechanical strength and flame retardancy of the material. Experimental data show that the tensile strength of Examples 1 to 3 all exceeds 12 MPa, the limiting oxygen index (LOI) reaches 55-58, the hardness is 6H, and the resistivity is as low as 4.2×10 4 Ω, while the tensile strength of Comparative Example 1 (without composite filler) is only 8.51 MPa, the LOI is 24, and the resistivity is 5.2×10 5 Ω, the tensile strength of Comparative Example 2 (only containing carbon nanotubes) is 9.71 MPa, the LOI is 26, and the resistivity is 4.5×10 4 Ω. This shows that the addition of composite fillers not only greatly improves the mechanical properties and flame retardancy of the coating, but also significantly reduces the resistivity, making it have excellent antistatic performance.

[0082] In the description of the specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0083] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology make various modifications or supplements to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A preparation method of an aqueous acrylate antistatic coating, characterized in that: It includes the following steps: Step 1: Mix styrene, methyl methacrylate, butyl acrylate, ethyl acrylate, acrylic acid, sodium dodecyl sulfate, composite filler, and deionized water, and perform high-speed shear pre-emulsification to form a monomer emulsion. Step 2: Mix sodium bicarbonate, deionized water, and ammonium persulfate, raise the temperature to 75 - 80 °C, slowly dropwise add the monomer emulsion, keep warm for 1 - 2 h after the addition is completed, cool down to 40 - 50 °C, adjust the pH to 7 - 8, and add deionized water in a volume ratio of 1:1 to obtain an aqueous acrylate antistatic coating.

2. The preparation method of an aqueous acrylate antistatic coating according to claim 1, characterized in that: The raw materials of the aqueous acrylate antistatic coating include the following components: by weight, 25 - 30 parts of styrene, 20 - 25 parts of methyl methacrylate, 30 - 35 parts of butyl acrylate, 10 - 15 parts of ethyl acrylate, 2 - 5 parts of acrylic acid, 1 - 2 parts of sodium dodecyl sulfate, 5 - 10 parts of composite filler, 0.1 - 0.3 parts of sodium bicarbonate, 0.5 - 1 part of ammonium persulfate, and 185 - 200 parts of deionized water.

3. The preparation method of an aqueous acrylate antistatic coating according to claim 1, characterized in that: The preparation process of the composite filler is as follows: A1: Disperse nano-silica in tetrahydrofuran, add γ-aminopropyltriethoxysilane, under a protective atmosphere, raise the temperature to 70 - 80 °C, react for 3 - 4 h, then wash the product and dry it under vacuum to obtain amino-functionalized silica. A2: Add amino-functionalized silica, 2,5-dimethoxybenzene-1,4-dicarbaldehyde, and 1,3,5-tris(4-aminophenyl)benzene to a mixed solvent of o-dichlorobenzene and n-butanol, add acetic acid, raise the temperature to 120 - 130 °C, react for 48 h, and centrifuge, wash, and dry the product to obtain pre-coated silica. A3: Add pre-coated silica to dimethylformamide, ultrasonically disperse for 20 - 30 min, add a modifier, raise the temperature to 40 - 50 °C, react for 2 - 3 h to obtain modified pre-coated silica. A4: Add modified pre-coated silica and carboxylated carbon nanotubes to dimethylformamide, add 1-ethyl-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, raise the temperature to 70 - 80 °C, ultrasonically mix for 6 - 8 h, filter and dry to obtain the composite filler.

4. The preparation method of an aqueous acrylate antistatic coating according to claim 3, characterized in that: The raw materials of the amino-functionalized silica include the following components: by weight, 0.5 - 1 part of nano-silica, 100 - 120 parts of tetrahydrofuran, and 2 - 3 parts of γ-aminopropyltriethoxysilane. The raw materials of the pre-coated silica include the following components: by weight, 4 - 5 parts of amino-functionalized silica, 2 - 3 parts of 2,5-dimethoxybenzene-1,4-dicarbaldehyde, 3 - 4 parts of 1,3,5-tris(4-aminophenyl)benzene, 180 - 200 parts of o-dichlorobenzene, 120 - 150 parts of n-butanol, and 70 - 80 parts of acetic acid. The raw materials of the modified pre-coated silica include the following components: by weight, 10 - 12 parts of pre-coated silica, 100 - 120 parts of dimethylformamide, and 5 - 8 parts of modifier.

5. The preparation method of an aqueous acrylate antistatic coating according to claim 3, characterized in that: The composite filler raw materials include the following components: by weight, 5-6 parts of pre-coated silica, 10-12 parts of carboxylated carbon nanotubes, and 150-180 parts of dimethylformamide.

6. The preparation method of an aqueous acrylate antistatic coating according to claim 3, characterized in that: The preparation process of the modifier is as follows: S1: Under a protective atmosphere, diphenylurea, dichlorophenylphosphine, and aluminum chloride are mixed, the temperature is raised to 30-40 °C, and the reaction is carried out for 10-12 h. After cooling to room temperature, hydrolysis is carried out using a hydrochloric acid solution, extraction, washing, and vacuum distillation are carried out to obtain intermediate A; S2: 3-allylsalicylaldehyde, triethylamine, and ethyl acetate are stirred and mixed, intermediate A is added, the temperature is raised to 60-70 °C, and the reaction is carried out for 3-4 h. After cooling to room temperature, filtration, washing, and drying are carried out to obtain the modifier.

7. The preparation method of an aqueous acrylate antistatic coating according to claim 6, characterized in that: The raw materials of intermediate A include the following substances, by weight, 21-22 parts of diphenylurea, 35-40 parts of dichlorophenylphosphine, and 2-3 parts of aluminum chloride; The raw materials of the modifier include the following substances, by weight, 49-50 parts of intermediate A, 32-40 parts of 3-allylsalicylaldehyde, 12-15 parts of triethylamine, and 350-400 parts of ethyl acetate.

8. An aqueous acrylate antistatic coating obtained by the preparation method of an aqueous acrylate antistatic coating according to any one of claims 1-7.

9. The application of the aqueous acrylate antistatic coating according to claim 8 in wood coatings.

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