Single-component waterborne epoxy dip-coating paint for finned radiator

Abstract

The invention belongs to the technical field of coatings, and discloses a single-component waterborne epoxy dip-coating coating for a finned radiator. A YBEP-405E single-component waterborne epoxy emulsion is used as a main film-forming substance, and a carbon nanotube modified fullerene ceramic heat-conducting material, an anticorrosive pigment, a pigment filler, a self-made defoaming and foam-inhibiting agent, an auxiliary agent and the like are added to prepare the single-component waterborne epoxy dip-coating paint for the finned radiator. The carbon nano tube modified fullerene ceramic heat conduction material is matched with the anti-corrosion pigment, so that the heat conductivity and the salt fog resistance of the coating are improved, and the self-made defoaming foam inhibitor eliminates the problem that the coating continuously generates bubbles in construction engineering. The single-component waterborne epoxy dip-coating paint for the finned radiator solves the technical problems of thermal conductivity, corrosion resistance and no bubble in construction of the single-component waterborne epoxy dip-coating paint for the finned radiator in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a single-component water-based epoxy dipping coating for a sheet-type radiator. Background Art

[0002] Plate radiators are widely used in transformer structures in power engineering. They have special structures such as a large number of plates, large plate width, and short plate spacing. Their coating process also has distinctive characteristics. Due to these factors, it is difficult to form a uniform coating between plates using traditional air spraying methods. Against this background, the radiator dip coating construction process came into being. Traditional plate radiators use oily epoxy ester amino coatings, but oily dip coatings will cause excessive solvent volatilization during use, and long-term baking at medium and high temperatures will affect air quality, pollute the water environment, and consume high energy. In comparison, water-based dip coatings have certain advantages. There is no solvent volatilization, which reduces energy consumption and improves energy utilization. It is the trend of future development.

[0003] At present, the water-based dip coatings for fin radiators include two-component water-based systems and one-component water-based systems. However, the two-component water-based system coatings will have a short activation period during the fin radiator dipping process, resulting in a series of problems such as poor adhesion. Therefore, the one-component water-based epoxy dip coating for fin radiators has emerged to meet actual needs.

[0004] Compared with the problems faced by two-component waterborne epoxy coatings during use, such as cumbersome operation, short adaptation period and relatively high price, one-component waterborne epoxy coatings not only retain the excellent performance of epoxy resins, but also have the advantages of simple operation, long trial period and relatively low price. However, in the actual application process of one-component waterborne epoxy dip coatings for plate radiators, its salt spray resistance is poor and usually not higher than 240h, and bubbles are easily generated in the coating during the construction process, affecting the coating quality. Therefore, it is urgent to solve the corresponding technical problems. Summary of the invention

[0005] Purpose of the invention: In view of the deficiencies in the prior art, the present invention solves the problem that the single-component water-based epoxy dip coating for the plate-type heat sink in the prior art is prone to generate bubbles during the dipping process, and the technical problem that the dip coating has good salt spray resistance (≥1000h) after being fully cured, and the plate-type heat sink has an excellent thermal conductive coating during operation.

[0006] Technical solution: The present invention provides a one-component water-based epoxy dip coating for a plate-type radiator, comprising the following components in parts by weight: 45 to 60 parts of a one-component water-based epoxy emulsion; 0.5 to 1 part of fumed silica; 0.5 to 1 part of nano-aluminum silicate; 0.5 to 1 part of carbon nanomaterial; 0.5 to 1 part of fullerene material; 2 to 5 parts of water-based epoxy phosphate; 1.5 to 3 parts of anhydrous ethanol; 1.5 to 2 parts of a film-forming aid; 1 to 2 parts of a dispersant; 0.3 to 0.5 parts of a wetting agent; 0.05 to 0.3 parts of a homemade defoaming and antifoaming agent; 0.5 to 1 part of a polyurethane thickener; 6 to 12 parts of deionized water; 10 to 22 parts of titanium dioxide; 4 to 10 parts of zinc phosphate; 4 to 10 parts of aluminum tripolyphosphate; 2 to 5 parts of a modified aluminum phosphate molecular sieve; and 4 to 10 parts of wet-ground sericite powder.

[0007] Specifically, the one-component waterborne epoxy emulsion is a macromolecular epoxy emulsion, preferably YBEP-405E. The one-component waterborne epoxy emulsion is a macromolecular epoxy emulsion with a solid content of 40%.

[0008] The scheme described in the present invention optimizes and improves the single-component water-based epoxy dip coating; it can achieve good defoaming inhibition of the coating during the dipping process, and at the same time, the homemade ceramic-like thermal conductive material combined with the anti-corrosion pigment improves the thermal conductivity and salt spray resistance of the coating, so that the coating has good thermal conductivity and long-term corrosion resistance.

[0009] The present invention provides a method for preparing a single-component waterborne epoxy dip coating for a sheet radiator, the steps of which are as follows:

[0010] Adding fumed silica, aqueous epoxy phosphate, nano-aluminum silicate, carbon nanomaterials and fullerene materials into anhydrous ethanol, dispersing them at a stirring speed of 2500 to 3500 r / min for 0.5 to 1.5 hours, and then ultrasonically dispersing them for 20 to 40 minutes to obtain a ceramic-like thermal conductive material;

[0011] Adding a single-component water-based epoxy emulsion, the ceramic-like thermal conductive material, a film-forming aid, a homemade defoaming and defoaming agent, a wetting agent and a dispersant to a deionized water phase in sequence, and stirring the mixture uniformly at a speed of 1500 to 2500 r / min at room temperature, adding titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-ground sericite powder and modified aluminum phosphate molecular sieve under stirring, and continuing to stir the mixture at a speed of 1500 to 2500 r / min for 30 to 40 minutes to uniformly disperse the components to obtain a mixture;

[0012] The mixture is ground with a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, and then the polyurethane thickener is added and stirred evenly to obtain the one-component waterborne epoxy dip coating for the fin-type radiator.

[0013] The self-made ceramic-like heat-conducting material of the present invention forms a fullerene-like ceramic structure in the curing of the paint film in combination with epoxy emulsion. The structure is formed by combining fullerene with aluminum ions in the anti-rust pigment under the catalytic action of carbon nanotubes, and the fullerene aluminum-like ceramic structure has excellent heat conduction efficiency. At the same time, the fullerene-like ceramic structure is also closely combined with other anti-rust pigments to synergistically make the obtained sheet-type radiator use a single-component water-based epoxy dip coating coating with good anti-corrosion performance (1000h, unidirectional corrosion expansion at the scratch <2m), and has good thermal conductivity and anti-corrosion effect. In terms of the anti-rust pigment, the present invention adds zinc phosphate and aluminum tripolyphosphate, as well as modified aluminum phosphate molecular sieves in the preparation process. Under the synergistic action of the three, the anti-corrosion performance of the paint film on rust coating and passivation is improved.

[0014] Specifically, the one-component waterborne epoxy emulsion is a macromolecular epoxy emulsion, preferably YBEP-405E. The one-component waterborne epoxy emulsion is a macromolecular 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 self-made defoamer is obtained by the following method: tetrahydrofuran, dodecyne diol polyethylene ether, and coupling agent are added to the reactor in sequence under stirring, stirred evenly, and then heated to reflux, kept at reflux for 4 hours, and tetrahydrofuran is removed by reduced pressure distillation to obtain the self-made defoamer and defoamer. The content of each component of the self-made defoamer and defoamer is:

[0018] Dodecyne glycol polyethylene ether 30%~50%

[0019] Coupling agent 30%~50%

[0020] Tetrahydrofuran 20%~40%.

[0021] The homemade defoaming and antifoaming agent used in this application can achieve good defoaming and antifoaming properties of the paint during the dipping process, improve the smoothness of the paint film surface, and is beneficial to the decorative effect of the next dipping coating.

[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 the present invention, the selection of wetting agent and dispersant also plays a big role, because in dip coating, the coating is required to have good substrate wetting performance, so that the coating can fully wet the rust layer and produce a good sealing effect on the porous rust layer; so it is necessary to select an ideal wetting agent to give the coating a suitable surface tension, improve leveling and substrate wetting, and improve the wettability and surface performance of the coating film. Therefore, the dispersant in the present invention is one or two of a polymer block copolymer and an alkyl polyoxyethylene, preferably a polymer block copolymer dispersant. The wetting agent selected in this application has a lower surface tension, and its anti-shrinkage and substrate wetting functions are better. The wetting agent is a polysiloxane, preferably TEGO4100.

[0024] Beneficial effects: 1. The present application optimizes and improves the composition of the single-component water-based epoxy coating, and adds water-based epoxy phosphate, fumed silica, nano-aluminum silicate, carbon nanomaterials and fullerene materials to form a fullerene ceramic structure. This structure is formed by the fullerene combining with the aluminum ions in the anti-rust pigment under the catalytic action of carbon nanotubes to form a fullerene aluminum ceramic structure, which has excellent thermal conductivity. At the same time, this fullerene ceramic structure will also be closely combined with other anti-rust pigments to work synergistically so that the obtained single-component water-based epoxy dip coating for the sheet radiator has good anti-corrosion performance (1000h, unidirectional corrosion expansion at the scratch <2m), and has good thermal conductivity and anti-corrosion effect.

[0025] 2. The single-component water-based epoxy dip coating for the plate-type radiator disclosed in the present application can achieve good defoaming inhibition during the dipping process, improve the smoothness of the paint film surface, and facilitate the decorative effect of the next dip coating.

[0026] 3. The single-component water-based epoxy dip coating for the plate-type radiator disclosed in the present application also adds anti-rust pigments such as modified aluminum phosphate molecular sieve, zinc phosphate, and aluminum tripolyphosphate to act synergistically, covering the ceramic-like structure of the water-based epoxy phosphate, preventing further oxidation reaction of the paint film, and improving the anti-rust ability of the coating. DETAILED DESCRIPTION

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

[0028] The embodiment of the present application discloses a one-component water-based epoxy dip coating for a fin-type radiator. The coating can be dip-coated on the surface of the fin-type radiator. No bubbles are generated during the dipping process, and the coating has good workability. At the same time, the coating has a fullerene aluminum ceramic structure, which has excellent adhesion to the substrate and excellent thermal conductivity efficiency. At the same time, the fullerene ceramic structure will also be closely combined with other anti-rust pigments to work synergistically so that the obtained one-component water-based epoxy dip coating for the fin-type radiator has good thermal conductivity and anti-corrosion effect on the basis of good anti-corrosion performance (1000h, unidirectional corrosion expansion at the scratch <2m).

[0029] Embodiment 1:

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

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

[0032] Among them, the single-component water-based epoxy emulsion in the components is YBEP-405E of a company in Shanghai; the fumed silica is Wacker fumed silica HDK H18; the carbon nanomaterial is TNIM190F of a company in Chengdu; the fullerene material is C60 of a company in Chengdu; the film-forming aid is propylene glycol phenyl ether; the dispersant is a polymer block copolymer dispersant BYK; the wetting agent is TEGO4100; the defoamer is BYK-022 defoamer; the average particle size of the nano-aluminum silicate is 20nm, and the nano-aluminum silicate of a company in Beijing can be selected;

[0033] During production, the components can be produced first, and the existing stirring production method can be adopted, or other production methods can be adopted.

[0034] The composition consists of the following steps:

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

[0036] Step S102: adding the ceramic-like thermal conductive material, the film-forming aid, the BYK-022 defoamer, the wetting agent and the dispersant to the deionized water phase in order, and stirring them uniformly at a speed of 1500 to 2500 r / min at room temperature, adding the titanium dioxide, the zinc phosphate, the aluminum tripolyphosphate, the wet-ground sericite powder and the modified aluminum phosphate molecular sieve under stirring, and continuing to stir at a speed of 1500 to 2500 r / min for 30 to 40 minutes to disperse the components uniformly to obtain a mixture;

[0037] Step S103: grinding the mixture of step 2 with a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then adding the polyurethane thickener, and stirring evenly to obtain the one-component waterborne epoxy dip coating A for the plate-type heat sink;

[0038] Embodiment 2:

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

[0040] 45 parts of one-component water-based epoxy emulsion; 0.5 parts of fumed silica; 2 parts of water-based epoxy phosphate; 1.5 parts of anhydrous ethanol; 1.5 parts of film-forming aid; 1 part of dispersant; 0.3 parts of wetting agent; 0.3 parts of homemade defoaming and antifoaming agent; 0.5 parts of polyurethane thickener; 12 parts of deionized water; 22 parts of titanium dioxide; 4 parts of zinc phosphate; 4 parts of aluminum tripolyphosphate; 2 parts of modified aluminum phosphate molecular sieve; 4 parts of wet-ground sericite powder;

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

[0042] The defoamer is a homemade defoamer and foam suppressor.

[0043] During production, the components can be produced first, and the existing stirring production method can be adopted, or other production methods can be adopted.

[0044] The composition consists of the following steps:

[0045] Step S201: Content of each component of the self-made defoaming and defoaming agent and its preparation method

[0046] Dodecyne glycol polyethylene ether 30%~50%

[0047] Coupling agent 30%~50%

[0048] Tetrahydrofuran 20%~40%

[0049] Tetrahydrofuran, dodecynediol polyethylene ether and a coupling agent were added to the reactor in sequence under stirring, and the mixture was evenly stirred and then heated to reflux. The mixture was kept at reflux for 4 hours, and the tetrahydrofuran was removed by reduced pressure distillation to obtain a self-made defoaming and antifoaming agent.

[0050] Step S202: adding the film-forming aid, the homemade defoaming and antifoaming agent, the wetting agent and the dispersant to the deionized water phase in order, and stirring them uniformly at a speed of 1500 to 2500 r / min at room temperature, adding the titanium dioxide, the zinc phosphate, the aluminum tripolyphosphate, the wet-ground sericite powder and the modified aluminum phosphate molecular sieve under stirring, and continuing to stir at a speed of 1500 to 2500 r / min for 30 to 40 minutes to disperse the components uniformly to obtain a mixture;

[0051] Step S203: grinding the mixture of step 2 with a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then adding the polyurethane thickener, and stirring evenly to obtain the one-component waterborne epoxy dip coating B for the plate-type heat sink;

[0052] Embodiment 3:

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

[0054] 45 parts of one-component water-based epoxy emulsion; 0.5 parts of fumed silica; 0.5 parts of nano-aluminum silicate; 0.5 parts of carbon nanomaterials; 0.5 parts of fullerene materials; 2 parts of water-based epoxy phosphate; 1.5 parts of anhydrous ethanol; 1.5 parts of film-forming aids; 1 part of dispersant; 0.3 parts of wetting agent; 0.3 parts of homemade defoaming and antifoaming agent; 0.5 parts of polyurethane thickener; 12 parts of deionized water; 22 parts of titanium dioxide; 4 parts of zinc phosphate; 4 parts of aluminum tripolyphosphate; 2 parts of modified aluminum phosphate molecular sieve; 4 parts of wet-ground sericite powder;

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

[0056] The defoamer is a homemade defoamer and foam suppressor.

[0057] During production, the components can be produced first, and the existing stirring production method can be adopted, or other production methods can be adopted.

[0058] The composition consists of the following steps:

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

[0060] Step S302: Content of each component of the self-made defoaming and defoaming agent and its preparation method

[0061] Dodecyne glycol polyethylene ether 30%~50%

[0062] Coupling agent 30%~50%

[0063] Tetrahydrofuran 20%~40%

[0064] Tetrahydrofuran, dodecynediol polyethylene ether and a coupling agent were added to the reactor in sequence under stirring, and the mixture was evenly stirred and then heated to reflux. The mixture was kept at reflux for 4 hours, and the tetrahydrofuran was removed by reduced pressure distillation to obtain a self-made defoaming and antifoaming agent.

[0065] Step S303: adding the ceramic-like thermal conductive material, the film-forming aid, the homemade defoaming and antifoaming agent, the wetting agent and the dispersant to the deionized water phase in order, and stirring them uniformly at a speed of 1500 to 2500 r / min at room temperature, adding the titanium dioxide, the zinc phosphate, the aluminum tripolyphosphate, the wet-ground sericite powder and the modified aluminum phosphate molecular sieve under stirring, and continuing to stir at a speed of 1500 to 2500 r / min for 30 to 40 minutes to disperse the components uniformly to obtain a mixture;

[0066] Step S304: grinding the mixture of step 2 with a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then adding the polyurethane thickener, and stirring evenly to obtain the one-component waterborne epoxy dip coating C for the plate-type heat sink;

[0067] Embodiment 4 (comparative example):

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

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

[0070] Among them, the single-component water-based epoxy emulsion in the components is YBEP-405E of a company in Shanghai; the fumed silica is Wacker fumed silica HDK H18; the carbon nanomaterial is TNIM190F of a company in Chengdu; the fullerene material is C60 of a company in Chengdu; the film-forming aid is propylene glycol phenyl ether; the dispersant is a polymer block copolymer dispersant BYK; the wetting agent is TEGO4100; the defoamer is BYK-022 defoamer; the average particle size of the nano-aluminum silicate is 20nm, and the nano-aluminum silicate of a company in Beijing can be selected;

[0071] During production, the components can be produced first, and the existing stirring production method can be adopted, or other production methods can be adopted.

[0072] The composition consists of the following steps:

[0073] Step S401: adding the film-forming aid, the defoaming agent, the wetting agent and the dispersant to the deionized water phase in order, and stirring them uniformly at a speed of 1500-2500 r / min at room temperature, adding the titanium dioxide, the zinc phosphate, the aluminum tripolyphosphate, the wet-ground sericite powder and the modified aluminum phosphate molecular sieve under stirring, and continuing to stir at a speed of 1500-2500 r / min for 30-40 minutes to disperse the components uniformly to obtain a mixture;

[0074] Step S402: grinding the mixture of step 2 with a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, then adding the polyurethane thickener, and stirring evenly to obtain the one-component waterborne epoxy dip coating D for the plate-type heat sink;

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

[0076]

[0077] From the data in Table 1, it can be seen that coating C is the best, with 0 bubbles / m during the construction process. 2, thermal conductivity 80W / m·K. The one-component water-based epoxy dip coating for the plate radiator of the present invention can be dip-coated on the plate radiator, and no bubbles are generated during the dipping process. It has good construction properties and effectively solves the problem of easy generation of bubbles in the construction process of the existing coating for the plate radiator; at the same time, the fullerene aluminum ceramic structure of the coating has excellent adhesion to the substrate and excellent thermal conductivity. The coating exhibits good thermal conductivity during the operation of the plate radiator, which greatly improves the thermal conductivity of the plate radiator. At the same time, this fullerene ceramic structure will also be closely combined with other anti-rust pigments to work synergistically, so that the obtained one-component water-based epoxy dip coating for the plate radiator has good thermal conductivity and anti-corrosion effect on the basis of good anti-corrosion performance (1000h, unidirectional corrosion expansion at the scratch <2m).

[0078] The above description is only a preferred embodiment of the present application and is not intended to limit the present application.

Claims

1. A one-component waterborne epoxy dip coating for a fin radiator, characterized in that: The invention comprises the following components in parts by weight: 45 to 60 parts of a single-component water-based epoxy emulsion; 0.5 to 1 part of fumed silicon dioxide; 0.5 to 1 part of nano-aluminum silicate; and 0.5 to 1 part of carbon nano-material. 0.5 to 1 parts of fullerene material; 2 to 5 parts of water-based epoxy phosphate; 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 homemade defoaming and antifoaming agent; 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; 4-10 parts of wet-ground sericite powder.

2. The one-component waterborne epoxy dip coating for a fin type radiator according to claim 1, characterized in that: The one-component water-based epoxy emulsion is a high molecular weight epoxy emulsion with a solid content of 40%.

3. A method for preparing a one-component waterborne epoxy dip coating for a fin radiator, characterized in that: Adding fumed silica, aqueous epoxy phosphate, nano-aluminum silicate, carbon nanomaterials and fullerene materials into anhydrous ethanol, dispersing them at a stirring speed of 2500 to 3500 r / min for 0.5 to 1.5 hours, and then ultrasonically dispersing them for 20 to 40 minutes to obtain a ceramic-like thermal conductive material; Adding a single-component water-based epoxy emulsion, the ceramic-like thermal conductive material, a film-forming aid, a homemade defoaming and defoaming agent, a wetting agent and a dispersant to a deionized water phase in sequence, and stirring the mixture uniformly at a speed of 1500 to 2500 r / min at room temperature, adding titanium dioxide, zinc phosphate, aluminum tripolyphosphate, wet-ground sericite powder and modified aluminum phosphate molecular sieve under stirring, and continuing to stir the mixture at a speed of 1500 to 2500 r / min for 30 to 40 minutes to uniformly disperse the components to obtain a mixture; The mixture is ground with a grinder for 0.5 to 1 hour until the fineness is less than 30 μm, and then the polyurethane thickener is added and stirred evenly to obtain the one-component waterborne epoxy dip coating for the fin-type radiator.

4. The method for preparing a one-component waterborne epoxy dip coating for a fin-type radiator according to claim 3, characterized in that: The self-made defoamer is obtained by the following method: tetrahydrofuran, dodecyne diol polyethylene ether and a coupling agent are sequentially added into a reactor under stirring, stirred evenly, and then heated to reflux, kept at reflux for 4 hours, and tetrahydrofuran is removed by reduced pressure distillation to obtain the self-made defoamer and defoamer.

5. According to the method for preparing a one-component waterborne epoxy dip coating for a fin-type radiator according to claim 3, the content of each component of the homemade defoaming and defoaming agent is: Dodecyne glycol polyethylene ether 30%~50% Coupling agent 30%~50% Tetrahydrofuran 20%~40%.

6. The method for preparing a one-component waterborne epoxy dip coating for a fin-type heat sink according to claim 3, characterized in that: The one-component water-based epoxy emulsion is YBEP-405E.

7. The method for preparing a one-component waterborne epoxy dip coating for a fin-type radiator according to claim 3, characterized in that: The average particle size of the nano aluminum silicate is 20 nm.

8. The method for preparing a one-component waterborne epoxy dip coating for a fin-type heat sink according to claim 3, characterized in that: The carbon nanomaterial is TNIM190F.

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

10. The method for preparing a one-component waterborne epoxy dip coating for a fin-type heat sink according to claim 3, characterized in that: The dispersant is one or two of a high molecular block copolymer and an alkyl polyoxyethylene; the wetting agent is polysiloxane.

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