One-component waterborne epoxy dip coating for sheet heat sinks

Abstract

The application belongs to the technical field of paint and discloses a single-component water-based epoxy dip-coating paint for sheet type radiators. A single-component water-based epoxy dip-coating paint for sheet type radiators is prepared by adding carbon nanotube modified fullerene ceramic heat-conducting material, anticorrosive pigment, pigment and filler, self-made defoaming and suppressing agent, and additives to YBEP-405E single-component water-based epoxy emulsion as a main film-forming material. The carbon nanotube modified fullerene ceramic heat-conducting material cooperates with the anticorrosive pigment to improve the heat conductivity and salt mist resistance of the coating, and the self-made defoaming and suppressing agent eliminates the problem of continuous bubble generation of the coating in construction engineering. The application solves the technical problems of heat conductivity, corrosion resistance and bubble-free construction of the single-component water-based epoxy dip-coating paint for sheet type radiators in the prior art.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and specifically to a single-component water-based epoxy dip coating for plate heat sinks. Background Technology

[0002] Plate-type radiators are widely used in transformer structures in power engineering. They feature a unique structure with numerous, wide, and short-spaced plates, and their coating process also has distinct characteristics. Due to these factors, traditional air spraying methods struggle to create a uniform coating between the plates. Against this backdrop, radiator dip coating technology has emerged. Traditional plate-type radiator coatings use oil-based epoxy ester amino paints. However, oil-based dip coatings result in excessive solvent evaporation during use, requiring prolonged high-temperature baking, which negatively impacts air quality, pollutes water, and consumes a lot of energy. In contrast, water-based dip coatings offer advantages such as no solvent evaporation, reduced energy consumption, and improved energy efficiency, representing the future trend.

[0003] Currently, water-based dip coatings for plate radiators include two-component and one-component water-based systems. However, two-component water-based coatings tend to have a short activation period during the dip coating process for plate radiators, leading to a series of problems such as poor adhesion. Therefore, one-component water-based epoxy dip coatings for plate radiators have emerged to meet practical needs.

[0004] Compared to two-component waterborne epoxy coatings, which suffer from cumbersome operation, short adaptation period, and relatively high price, single-component waterborne epoxy coatings not only retain the excellent properties of epoxy resins but also offer advantages such as simple operation, long trial period, and relatively low price. However, in practical applications, single-component waterborne epoxy dip coatings for radiator panels exhibit poor salt spray resistance, typically not exceeding 240 hours, and are prone to blistering during application, affecting coating quality. Therefore, there is an urgent need to address these technical issues. Summary of the Invention

[0005] Purpose of the invention: To address the shortcomings of the prior art, the present invention solves the problems of easy bubble generation during the dip coating process of single-component water-based epoxy dip coating for plate heat sinks, good salt spray resistance (≥1000h) after complete curing of the dip coating, and excellent thermal conductivity of the plate heat sink coating during operation.

[0006] Technical Solution: This invention provides a single-component waterborne epoxy dip-coating for plate-type heat sinks, comprising the following components by weight: 45-60 parts of single-component waterborne epoxy emulsion; 0.5-1 parts of fumed silica; 0.5-1 parts of nano-aluminum silicate; 0.5-1 parts of carbon nanomaterials; 0.5-1 parts of fullerene materials; 2-5 parts of waterborne epoxy phosphate ester; 1.5-3 parts of anhydrous ethanol; 1.5-2 parts of film-forming aid; 1-2 parts of dispersant; 0.3-0.5 parts of wetting agent; 0.05-0.3 parts of self-made defoamer and defoamer suppressant; 0.5-1 parts of polyurethane thickener; 6-12 parts of deionized water; 10-22 parts of titanium dioxide; 4-10 parts of zinc phosphate; 4-10 parts of aluminum tripolyphosphate; 2-5 parts of modified aluminum phosphate molecular sieve; and 4-10 parts of wet-milled sericite powder.

[0007] Specifically, the single-component aqueous epoxy emulsion is a macromolecular epoxy emulsion, preferably YBEP-405E. The single-component aqueous epoxy emulsion is a high-molecular-weight epoxy emulsion with a solid content of 40%.

[0008] The present invention optimizes and improves the single-component waterborne epoxy dip coating; it enables the coating to have excellent defoaming and inhibition properties during the dip coating process. At the same time, the self-made ceramic-like thermal conductive material combined with anti-corrosion pigments improves the thermal conductivity and salt spray resistance of the coating, so that the coating has excellent thermal conductivity and long-term corrosion resistance.

[0009] This invention provides a method for preparing a single-component water-based epoxy dip-coating for plate heat sinks, comprising the following steps:

[0010] Fumed silica, aqueous epoxy phosphate, nano-aluminum silicate, carbon nanomaterials and fullerene materials are added to anhydrous ethanol and dispersed at a stirring speed of 2500-3500 r / min for 0.5-1.5 h, and then ultrasonically dispersed for 20-40 min to obtain a ceramic-like thermal conductive material.

[0011] In a deionized aqueous phase, a single-component aqueous epoxy emulsion, the above-mentioned ceramic-like thermal conductive material, film-forming aid, self-made defoamer and defoaming agent, wetting agent and dispersant are added in sequence, and stirred evenly at a speed of 1500-2500 r / min at room temperature. While stirring, titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-milled sericite powder and modified aluminum phosphate molecular sieve are added, and stirring is continued at a speed of 1500-2500 r / min for 30-40 min to disperse the components evenly and obtain a mixture.

[0012] The above mixture is ground in a grinder for 0.5 to 1 hour until the fineness is less than 30 μm. Then, the polyurethane thickener is added and stirred evenly to obtain the single-component water-based epoxy dip coating for the plate heat sink.

[0013] This invention utilizes a self-made ceramic-like thermally conductive material, which, in conjunction with an epoxy emulsion, forms a fullerene-like ceramic structure during the curing process. This structure is formed by the combination of fullerenes with aluminum ions in anti-rust pigments under the catalysis of carbon nanotubes, creating a fullerene-aluminum ceramic structure. This structure exhibits excellent thermal conductivity. Simultaneously, this fullerene-like ceramic structure also synergistically combines with other anti-rust pigments, resulting in a single-component water-based epoxy dip-coating for plate-type heat sinks that, while possessing good corrosion resistance (1000h, unidirectional erosion at scratches <2m), also exhibits excellent thermal conductivity and corrosion resistance. Regarding the anti-rust pigments, this invention incorporates zinc phosphate, aluminum tripolyphosphate, and modified aluminum phosphate molecular sieves during the preparation process. The synergistic effect of these three components enhances the coating and passivation corrosion resistance of the paint film against rust.

[0014] Specifically, the single-component aqueous epoxy emulsion is a macromolecular epoxy emulsion, preferably YBEP-405E. The single-component aqueous epoxy emulsion is a high-molecular-weight epoxy emulsion with a solid content of 40%.

[0015] Specifically, the average particle size of the nano-aluminum silicate is 20 nm. The carbon nanomaterial is preferably TNIM190F.

[0016] Specifically, the fullerene material is C60 from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences.

[0017] Specifically, the homemade defoamer is obtained by the following method: Tetrahydrofuran, dodecaacetylenic diol polyvinyl ether, and a coupling agent are added sequentially to a reactor under stirring. After thorough mixing, the mixture is heated to reflux and maintained at reflux for 4 hours. Tetrahydrofuran is then removed by vacuum distillation to obtain the homemade defoamer. The content of each component in the homemade defoamer is as follows:

[0018] Dodecynediol polyvinyl ether 30%–50%

[0019] Coupling agent 30%–50%

[0020] Tetrahydrofuran 20%–40%.

[0021] The self-made defoaming and antifoaming agent used in this application can achieve excellent defoaming and antifoaming properties in the coating during dip coating, improve the smoothness of the paint film surface, and benefit the decorative effect of the next dip coating layer.

[0022] Specifically, the film-forming aid in the component is one or two of dipropylene glycol methyl ether, dipropylene glycol n-butyl ether, and propylene glycol phenyl ether, preferably propylene glycol phenyl ether. The polyurethane thickener is a polyurethane associative thickener.

[0023] In this invention, the selection of wetting agents and dispersants plays a significant role. During dip coating, the coating material is required to have good substrate wetting properties so that it can fully wet the rust layer and effectively seal the porous rust. Therefore, selecting an ideal wetting agent to impart suitable surface tension to the coating, improve leveling and substrate wetting, and enhance the wettability and appearance of the coating film is essential. Thus, the dispersant in this invention is one or both of polymeric block copolymers and alkyl polyoxyethylene dispersants, with polymeric block copolymer dispersants being preferred. The wetting agent selected in this application has a lower surface tension and better anti-cratering and substrate wetting functions. The wetting agent is a polysiloxane, preferably TEGO4100.

[0024] Beneficial effects: 1. This application optimizes and improves the composition of single-component waterborne epoxy coatings by adding waterborne epoxy phosphate, fumed silica, nano-alumina silicate, carbon nanomaterials, and fullerene materials to form a fullerene-like ceramic structure. This structure is formed by the combination of fullerene with aluminum ions in anti-rust pigments under the catalysis of carbon nanotubes, resulting in a fullerene-alumina ceramic structure with excellent thermal conductivity. At the same time, this fullerene-like ceramic structure also closely combines with other anti-rust pigments to synergistically enhance the single-component waterborne epoxy dip coating for plate radiators, providing good corrosion resistance (1000h, unidirectional erosion at scratches <2m), as well as good thermal conductivity and corrosion resistance.

[0025] 2. The single-component water-based epoxy dip coating for plate radiators disclosed in this application can achieve excellent defoaming and inhibition properties during the dip coating process, improve the smoothness of the paint film surface, and benefit the decorative effect of the next dip coating layer.

[0026] 3. The single-component waterborne epoxy dip coating for plate radiators disclosed in this application also contains rust-preventive pigments such as modified aluminum phosphate molecular sieve, zinc phosphate, and aluminum tripolyphosphate, which work synergistically to coat the ceramic-like structure of waterborne epoxy phosphate ester, preventing further oxidation of the paint film and improving the rust-preventive ability of the coating. Detailed Implementation

[0027] The following are embodiments to illustrate the present invention in detail, but the scope of protection of the present invention is not limited to the embodiments described.

[0028] This application discloses a single-component water-based epoxy dip coating for plate radiators. This coating can be dip-coated onto the surface of plate radiators without generating bubbles during the dip-coating process, exhibiting good workability. Furthermore, the coating possesses a fullerene-alumina ceramic structure, which exhibits excellent adhesion to the substrate and superior thermal conductivity. Simultaneously, this fullerene-alumina ceramic structure also synergistically combines with other anti-rust pigments, resulting in a single-component water-based epoxy dip coating for plate radiators that, while possessing good corrosion resistance (1000h, unidirectional corrosion propagation at scratches <2m), also exhibits excellent thermal conductivity and corrosion protection.

[0029] Example 1:

[0030] The coating comprises the following components in parts by weight:

[0031] 45 parts single-component aqueous epoxy emulsion; 0.5 parts fumed silica; 0.5 parts nano-aluminum silicate; 0.5 parts carbon nanomaterials; 0.5 parts fullerene materials; 2 parts aqueous epoxy phosphate ester; 1.5 parts anhydrous ethanol; 1.5 parts film-forming aid; 1 part dispersant; 0.3 parts wetting agent; 0.3 parts BYK-022 defoamer; 0.5 parts polyurethane thickener; 12 parts deionized water; 22 parts titanium dioxide; 4 parts zinc phosphate; 4 parts aluminum tripolyphosphate; 2 parts modified aluminum phosphate molecular sieve; 4 parts wet-milled sericite powder;

[0032] The components include: a single-component aqueous epoxy emulsion (YBEP-405E from a Shanghai company); fumed silica (Wacker HDK H18); carbon nanomaterials (TNIM190F from a Chengdu company); fullerene material (C60 from a Chengdu company); film-forming aid (propylene glycol phenyl ether); dispersant (BYK polymer block copolymer dispersant); wetting agent (TEGO4100); defoamer (BYK-022 defoamer); and nano-aluminum silicate with an average particle size of 20 nm, which can be selected from nano-aluminum silicate from a Beijing company.

[0033] During production, the components can be prepared first, using existing mixing production methods or other methods.

[0034] This component is produced through the following steps:

[0035] Step S101: Add the fumed silica, the aqueous epoxy phosphate, the nano aluminum silicate, the carbon nanomaterial and the fullerene material to the anhydrous ethanol, disperse at a stirring speed of 2500-3500 r / min for 0.5-1.5 h, and then ultrasonically disperse for 20-40 min to obtain a ceramic-like thermal conductive material.

[0036] Step S102: Add the following components in sequence to the deionized aqueous phase: the ceramic-like thermal conductive material, the film-forming aid, the BYK-022 defoamer, the wetting agent, and the dispersant. Stir the mixture evenly at 1500–2500 r / min at room temperature. While stirring, add the titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-milled sericite powder, and modified aluminum phosphate molecular sieve. Continue stirring at 1500–2500 r / min for 30–40 min to ensure uniform dispersion of all components, thus obtaining a mixture.

[0037] Step S103: Grind the mixture from step 2 using a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then add the polyurethane thickener and stir evenly to obtain the single-component waterborne epoxy dip coating A for the plate heat sink.

[0038] Example 2:

[0039] The coating comprises the following components in parts by weight:

[0040] 45 parts single-component aqueous epoxy emulsion; 0.5 parts fumed silica; 2 parts aqueous epoxy phosphate ester; 1.5 parts anhydrous ethanol; 1.5 parts film-forming aid; 1 part dispersant; 0.3 parts wetting agent; 0.3 parts homemade defoamer and foam suppressant; 0.5 parts polyurethane thickener; 12 parts deionized water; 22 parts titanium dioxide; 4 parts zinc phosphate; 4 parts aluminum tripolyphosphate; 2 parts modified aluminum phosphate molecular sieve; 4 parts wet-milled sericite powder;

[0041] The single-component aqueous epoxy emulsion in the composition is YBEP-405E from a company in Shanghai; the fumed silica is Wacker HDK H18 fumed silica; the carbon nanomaterial is TNIM190F from a company in Chengdu; the fullerene material is C60 from a company in Chengdu; the film-forming aid is propylene glycol phenyl ether; the dispersant is BYK polymer block copolymer dispersant; the wetting agent is TEGO4100; and the nano-aluminum silicate has an average particle size of 20 nm, and can be selected from nano-aluminum silicate from a company in Beijing.

[0042] The defoamer is a self-made defoaming and foam-suppressing agent.

[0043] During production, the components can be prepared first, using existing mixing production methods or other methods.

[0044] This component is produced through the following steps:

[0045] Step S201: The content of each component of the self-made defoamer and its preparation method

[0046] Dodecynediol polyvinyl ether 30%–50%

[0047] Coupling agent 30%–50%

[0048] Tetrahydrofuran 20%–40%

[0049] Tetrahydrofuran, dodecaacetylenol polyethylene ether, and coupling agent were added sequentially to the reactor under stirring. After stirring until homogeneous, the mixture was heated to reflux and kept at reflux for 4 hours. Tetrahydrofuran was removed by vacuum distillation to obtain the self-made defoaming and foam-suppressing agent.

[0050] Step S202: Add the following to the deionized aqueous phase in sequence: the film-forming aid, the self-made defoaming and defoaming agent, the wetting agent, and the dispersant. Stir the mixture evenly at 1500-2500 r / min at room temperature. While stirring, add the titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-milled sericite powder, and modified aluminum phosphate molecular sieve. Continue stirring at 1500-2500 r / min for 30-40 min to ensure uniform dispersion of all components and obtain a mixture.

[0051] Step S203: Grind the mixture from step 2 using a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then add the polyurethane thickener and stir evenly to obtain the single-component water-based epoxy dip coating B for the plate heat sink;

[0052] Example 3:

[0053] The coating comprises the following components in parts by weight:

[0054] 45 parts single-component aqueous epoxy emulsion; 0.5 parts fumed silica; 0.5 parts nano-aluminum silicate; 0.5 parts carbon nanomaterials; 0.5 parts fullerene materials; 2 parts aqueous epoxy phosphate ester; 1.5 parts anhydrous ethanol; 1.5 parts film-forming aid; 1 part dispersant; 0.3 parts wetting agent; 0.3 parts self-made defoamer and foam suppressant; 0.5 parts polyurethane thickener; 12 parts deionized water; 22 parts titanium dioxide; 4 parts zinc phosphate; 4 parts aluminum tripolyphosphate; 2 parts modified aluminum phosphate molecular sieve; 4 parts wet-milled sericite powder;

[0055] The single-component aqueous epoxy emulsion in the composition is YBEP-405E from a company in Shanghai; the fumed silica is Wacker HDK H18 fumed silica; the carbon nanomaterial is TNIM190F from a company in Chengdu; the fullerene material is C60 from a company in Chengdu; the film-forming aid is propylene glycol phenyl ether; the dispersant is BYK polymer block copolymer dispersant; the wetting agent is TEGO4100; and the nano-aluminum silicate has an average particle size of 20 nm, and can be selected from nano-aluminum silicate from a company in Beijing.

[0056] The defoamer is a self-made defoaming and foam-suppressing agent.

[0057] During production, the components can be prepared first, using existing mixing production methods or other methods.

[0058] This component is produced through the following steps:

[0059] Step S301: Add the fumed silica, the aqueous epoxy phosphate, the nano aluminum silicate, the carbon nanomaterial and the fullerene material to the anhydrous ethanol, disperse at a stirring speed of 2500-3500 r / min for 0.5-1.5 h, and then ultrasonically disperse for 20-40 min to obtain a ceramic-like thermal conductive material.

[0060] Step S302: The content of each component of the self-made defoamer and its preparation method

[0061] Dodecynediol polyvinyl ether 30%–50%

[0062] Coupling agent 30%–50%

[0063] Tetrahydrofuran 20%–40%

[0064] Tetrahydrofuran, dodecaacetylenol polyethylene ether, and coupling agent were added sequentially to the reactor under stirring. After stirring until homogeneous, the mixture was heated to reflux and kept at reflux for 4 hours. Tetrahydrofuran was removed by vacuum distillation to obtain the self-made defoaming and foam-suppressing agent.

[0065] Step S303: Add the following to the deionized aqueous phase in sequence: the ceramic-like thermal conductive material, the film-forming aid, the self-made defoaming and antifoaming agent, the wetting agent, and the dispersant. Stir the mixture evenly at 1500-2500 r / min at room temperature. While stirring, add the titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-milled sericite powder, and modified aluminum phosphate molecular sieve. Continue stirring at 1500-2500 r / min for 30-40 min to ensure uniform dispersion of all components and obtain a mixture.

[0066] Step S304: Grind the mixture from step 2 using a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then add the polyurethane thickener and stir evenly to obtain the single-component water-based epoxy dip coating C for the plate heat sink;

[0067] Example 4 (Comparative Example):

[0068] The coating comprises the following components in parts by weight:

[0069] 45 parts single-component aqueous epoxy emulsion; 2 parts aqueous epoxy phosphate ester; 1.5 parts anhydrous ethanol; 1.5 parts film-forming aid; 1 part dispersant; 0.3 parts wetting agent; 0.3 parts BYK-022 defoamer; 0.5 parts polyurethane thickener; 12 parts deionized water; 22 parts titanium dioxide; 4 parts zinc phosphate; 4 parts aluminum tripolyphosphate; 2 parts modified aluminum phosphate molecular sieve; 4 parts wet-milled sericite powder;

[0070] The components include: a single-component aqueous epoxy emulsion (YBEP-405E from a Shanghai company); fumed silica (Wacker HDK H18); carbon nanomaterials (TNIM190F from a Chengdu company); fullerene material (C60 from a Chengdu company); film-forming aid (propylene glycol phenyl ether); dispersant (BYK polymer block copolymer dispersant); wetting agent (TEGO4100); defoamer (BYK-022 defoamer); and nano-aluminum silicate with an average particle size of 20 nm, which can be selected from nano-aluminum silicate from a Beijing company.

[0071] During production, the components can be prepared first, using existing mixing production methods or other methods.

[0072] This component is produced through the following steps:

[0073] Step S401: Add the following to the deionized aqueous phase in sequence: the film-forming aid, the defoamer, the wetting agent, and the dispersant. Stir the mixture at 1500-2500 r / min at room temperature until homogeneous. While stirring, add the titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-milled sericite powder, and modified aluminum phosphate molecular sieve. Continue stirring at 1500-2500 r / min for 30-40 min to ensure uniform dispersion of all components and obtain a mixture.

[0074] Step S402: Grind the mixture from step 2 using a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then add the polyurethane thickener and stir evenly to obtain the single-component waterborne epoxy dip coating D for the plate heat sink;

[0075] The properties of the various coatings and their coatings in Examples 1 to 4 above are shown in the following table:

[0076]

[0077] The data in Table 1 shows that paint C is the best, with 0 air bubbles per cubic meter during application. 2The thermal conductivity is 80 W / m·K. This invention provides a single-component water-based epoxy dip coating for plate radiators, which can be dip-coated onto plate radiators without generating bubbles during the dip-coating process, exhibiting excellent workability and effectively solving the problem of bubble generation during the application of existing coatings for plate radiators. Furthermore, the fullerene-alumina ceramic structure of this coating provides excellent adhesion to the substrate and superior thermal conductivity. The coating demonstrates excellent thermal conductivity during the operation of the plate radiator, significantly improving its thermal efficiency. Simultaneously, this fullerene-alumina ceramic structure also synergistically combines with other rust-inhibiting pigments, resulting in a single-component water-based epoxy dip coating for plate radiators that, while possessing good corrosion resistance (1000h, unidirectional corrosion propagation at scratches <2m), also exhibits excellent thermal conductivity and corrosion protection.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application.

Claims

1. A single-component water-based epoxy impregnation coating for plate-type heat sinks, characterized in that, It comprises the following components in parts by weight: 45–60 parts of a single-component aqueous epoxy emulsion; 0.5–1 part of fumed silica; 0.5–1 part of nano-aluminum silicate; and 0.5–1 part of carbon nanomaterials. 0.5–1 part fullerene material; 2–5 parts aqueous epoxy phosphate ester; 1.5–3 parts anhydrous ethanol; 1.5–2 parts film-forming aid; 1–2 parts dispersant; 0.3–0.5 parts wetting agent; 0.05–0.3 parts self-made defoamer and defoamer inhibitor; 0.5–1 part polyurethane thickener; 6–12 parts deionized water; 10–22 parts titanium dioxide; 4–10 parts zinc phosphate; 4–10 parts aluminum tripolyphosphate; 2–5 parts modified aluminum phosphate molecular sieve; 4–10 parts wet-milled sericite powder; The coating is obtained by the following method: Fumed silica, aqueous epoxy phosphate, nano-aluminum silicate, carbon nanomaterials and fullerene materials are added to anhydrous ethanol and dispersed at a stirring speed of 2500-3500 r / min for 0.5-1.5 h, and then ultrasonically dispersed for 20-40 min to obtain a ceramic-like thermal conductive material. In a deionized aqueous phase, a single-component aqueous epoxy emulsion, the above-mentioned ceramic-like thermal conductive material, film-forming aid, self-made defoamer and defoaming agent, wetting agent and dispersant are added in sequence, and stirred evenly at a speed of 1500-2500 r / min at room temperature. While stirring, titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-milled sericite powder and modified aluminum phosphate molecular sieve are added, and stirring is continued at a speed of 1500-2500 r / min for 30-40 min to disperse the components evenly and obtain a mixture. The above mixture is ground in a grinder for 0.5 to 1 hour until the fineness is less than 30 μm. Then, the polyurethane thickener is added and stirred evenly to obtain the single-component water-based epoxy dip coating for the plate heat sink. The content of each component in the self-made defoamer / antifoaming agent is as follows: Dodecynediol polyvinyl ether 30%–50% Coupling agent 30%–50% Tetrahydrofuran 20%–40%.

2. The single-component water-based epoxy dip coating for plate-type heat sinks according to claim 1, characterized in that, The single-component aqueous epoxy emulsion is a high molecular weight epoxy emulsion with a solid content of 40%.

3. The method for preparing a single-component water-based epoxy dip-coating for plate-type heat sinks according to claim 1, characterized in that, The self-made defoamer and defoaming agent is obtained by the following method: under stirring, tetrahydrofuran, dodecaacetylenic diol polyethylene ether, and coupling agent are added to the reactor in sequence and stirred evenly. The mixture is then heated to reflux and kept at reflux for 4 hours. The tetrahydrofuran is removed by vacuum distillation to obtain the self-made defoamer and defoaming agent.

4. The preparation method of the single-component water-based epoxy dip-coating coating for plate heat sinks according to claim 3, characterized in that, The average particle size of the nano-aluminum silicate is 20 nm.

5. The method for preparing a single-component water-based epoxy dip-coating for plate-type heat sinks according to claim 3, characterized in that, The carbon nanomaterial is TNIM190F.

6. The method for preparing a single-component water-based epoxy dip-coating for a plate-type heat sink according to claim 3, characterized in that, The film-forming aid in the component is one or two of dipropylene glycol methyl ether, dipropylene glycol n-butyl ether, and propylene glycol phenyl ether; the polyurethane thickener is a polyurethane associative thickener.

7. The method for preparing a single-component water-based epoxy dip-coating for plate-type heat sinks according to claim 3, characterized in that, The dispersant is one or both of polymeric block copolymers and alkyl polyoxyethylene compounds; the wetting agent is polysiloxane.

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