A water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating and a preparation method thereof

Abstract

The application relates to the technical field of paint, in particular to a water-based high-temperature-resistant inorganic nano silicon-aluminum insulation paint and a preparation method thereof. The water-based high-temperature-resistant inorganic nano silicon-aluminum insulation paint comprises the following raw materials in parts by weight: water-based nano tree 50-70 parts, color paste 18-23 parts, whisker silicon 12-18 parts, water-based dispersing agent 0.4-0.8 parts, water-based anti-graffiti additive 1-1.5 parts, leveling agent 0.5-0.9 parts, defoaming agent 0.4-0.8 parts, cosolvent 3-5 parts, neutralizing agent 0.2-0.8 parts and deionized water 6-16 parts. The obtained paint film has good insulation, good hydrophobicity, lotus effect, safety, environmental protection, non-toxicity, super-high heat resistance, heat resistance reaching above 800 DEG C, and no odor and smoke in the case of high temperature or combustion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, and in particular to a water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating and a preparation method thereof. BACKGROUND

[0002] The vehicle-mounted power battery has wide application prospects, in order to enhance the safety performance of the vehicle-mounted power battery, a battery cover plate or a battery shell is usually arranged on the vehicle-mounted power battery, and a high-temperature-resistant insulation coating is coated on the battery cover plate to form a high-temperature-resistant insulation coating. When the battery has an accident and generates high temperature, the high-temperature-resistant insulation coating can well protect the battery cover plate, reduce the possibility of deformation of the battery cover plate, effectively maintain the structural stability of the battery cover plate, reduce the diffusion speed and diffusion area of high temperature and heat, and thus improve the safety performance of the vehicle-mounted power battery.

[0003] However, the existing insulation coating has the following technical defects, which cannot well meet the application requirements of the vehicle-mounted power battery:

[0004] 1. The coating contains a large amount of harmful substances such as dibutyl tin, benzene, xylene and other organic solvents, and has poor environmental protection.

[0005] 2. The heat resistance is insufficient, the coating cannot meet the super-high heat resistance requirement, and when the temperature reaches 400 DEG C, the paint film is completely destroyed, and the structural stability of the battery cover cannot be well maintained.

[0006] 3. The main organic silicon coating will produce smoke and odor when the temperature exceeds 400 DEG C or in the case of open flame combustion, and the safety is low. SUMMARY

[0007] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating, which has good insulation, good hydrophobicity, achieves lotus effect, is safe, environmentally friendly and non-toxic, has super-high heat resistance, and the heat resistance temperature reaches 800 DEG C or more, and the coating remains odorless and smokeless in the case of high temperature or combustion.

[0008] The purpose of the present application is achieved by the following technical scheme: a water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating, comprising the following raw materials by weight:

[0009]

[0010] The water-based dispersant is BYK-190 dispersant.

[0011] The water-based anti-graffiti additive is DiGao 5100 anti-graffiti additive.

[0012] The leveling agent is AMORSO-328 leveling agent produced by Shanghai Jiyanshi Industry Co., Ltd.

[0013] The defoaming agent is Silok-4075 defoaming agent.

[0014] The cosolvent is ethylene glycol monobutyl ether.

[0015] The neutralizing agent is Hymens DMAE ammonia neutralizing agent.

[0016] The water-based nano resin comprises the following raw materials in parts by weight:

[0017]

[0018]

[0019] The catalyst is a mixture of formic acid and acetic acid with a mass ratio of 2-4:1-2.

[0020] The wet leveling agent is DiGu 4100 leveling agent.

[0021] The water-based nano resin of the present application uses silica sol and aluminum sol as main materials, and various raw materials are synergistically matched, and the heat resistance is excellent, and the heat resistance temperature can reach more than 1000 DEG C, which can effectively improve the heat resistance of the insulating coating of the present application.

[0022] The color paste comprises the following raw materials in parts by weight:

[0023]

[0024] The auxiliary agent is Hymens Decon 299 water-based thickening agent.

[0025] The toner is copper-chromium black powder.

[0026] The dispersing agent is BYK-190 dispersing agent.

[0027] The present application uses the above self-developed color paste, and the thermal stability is good, the heat resistance is good, the heat resistance temperature reaches 800 DEG C, which can effectively improve the heat resistance of the insulating coating of the present application.

[0028] The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above comprises the following steps: 1) preparing a water-based nano-resin for standby; 2) preparing a color paste for standby; 3) stirring and mixing the water-based nano-resin and a cosolvent uniformly to obtain a first mixture; 4) mixing the water-based dispersing agent, the defoaming agent, the leveling agent and part of the deionized water uniformly, then adding the first mixture, stirring and mixing uniformly to obtain a second mixture; 5) adding the water-based anti-graffiti additive, the color paste and the whisker silicon into the second mixture, stirring and mixing uniformly to obtain a third mixture; 6) adding the neutralizing agent and the remaining deionized water into the third mixture, stirring and mixing uniformly to obtain the insulation coating.

[0029] The stirring speed in step 3) is 300-400 r / min, and the stirring time is 13-17 min.

[0030] The stirring speed in step 4) is 450-500 r / min, and the stirring time is 12-14 min.

[0031] The stirring speed in step 5) is 550-600 r / min, and the stirring time is 25-35 min.

[0032] The stirring speed in step 6) is 550-650 r / min, and the stirring time is 20-30 min.

[0033] The preparation of the water-based nano-resin comprises the following steps: adding the silica sol, the aluminum sol, the deionized water and the catalyst into a reaction kettle, stirring and reacting sufficiently, the stirring speed is 500-800 r / min, and the stirring time is 10-30 min; then adding the methyltrimethoxysilane, the phenyltrimethoxysilane and the tetraethyl orthosilicate, stirring and reacting sufficiently, the stirring speed is 500-800 r / min, and the stirring time is 2-3 h; after cooling, adding the wetting leveling agent, stirring and mixing uniformly, the stirring speed is 300-400 r / min, and the stirring time is 5-10 min, to obtain the water-based nano-resin.

[0034] The preparation of the color paste comprises the following steps: adding the deionized water into a stirring kettle, adding the dispersing agent while stirring, stirring and mixing uniformly, the stirring speed is 80-120 r / min, and the stirring time is 5-10 min; adding the color powder and the whisker silicon while stirring, stirring and mixing uniformly, the stirring speed is 600-1000 r / min, and the stirring time is 10-30 min; adding the additives while stirring, stirring and mixing uniformly, the stirring speed is 500-1000 r / min, and the stirring time is 10-30 min, to obtain a semi-finished color paste; adding the semi-finished color paste into a grinder, grinding the fineness to below 10 um, to obtain the color paste.

[0035] The use method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above comprises the following steps: uniformly spraying the insulation coating on the surface of a substrate to form a coating layer, and baking the substrate with the coating layer in an environment at 180-230 DEG C for 30-40 min to obtain a dry paint film.

[0036] During high-temperature baking, the raw material components of the insulation coating of the present application cross-link, the color paste, the water-based nano-resin and the rest synergistically cooperate to further improve the heat resistance of the insulation coating, and the dry paint film formed has super-high heat resistance and will not be damaged by high temperature without powdering at a temperature of 800 DEG C or above.

[0037] Before spraying, the coating preparation step of stirring and dispersing the insulation coating and then filtering with a #100-150 stainless steel filter screen is further included.

[0038] The thickness of the dry paint film after spraying is controlled at 50-80 mu m.

[0039] The present application has the following advantages:

[0040] The water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating of the present application has a paint film with good insulation and good surface hydrophobicity, so that water cannot penetrate the coating layer to achieve the lotus effect; the existing ordinary heat-resistant coating mainly uses organic silicon coating, which will produce smoke and odor at more than 400 DEG C or in the case of open flame, but the coating of the present application does not contain harmful substances such as dibutyl tin, benzene, xylene and other organic solvents, and all kinds of reagents used are water-based reagents, and the obtained insulation coating is a water-based coating, which has a very low VOC compared with the existing insulation paint, is safe, environmentally friendly and non-toxic, and the coating remains odorless and smokeless in the case of high temperature or burning; the heat resistance of the existing insulation paint after film formation can only reach 400 DEG C, while the present application has super-high heat resistance and can reach a heat resistance of 800 DEG C or above, which can well meet the needs of vehicle-mounted power batteries and improve the safety of vehicle-mounted power batteries.

[0041] The preparation method of the present application is simple to operate and suitable for wide promotion, and the insulation coating produced has a paint film with good insulation and good hydrophobicity, achieves the lotus effect, is safe, environmentally friendly and non-toxic, has super-high heat resistance, and has a heat resistance of 800 DEG C or above, and the coating remains odorless and smokeless in the case of high temperature or burning.

[0042] The method for using the insulating paint of the present application is simple in operation, and the obtained paint film has good insulating property, good hydrophobicity, lotus effect, safety, environmental protection, no toxicity, super high heat resistance, and heat resistance of above 800 DEG C. In the case of high temperature or combustion, the coating remains odorless and smokeless. DETAILED DESCRIPTION

[0043] For the convenience of those skilled in the art, the present application is further described below in combination with examples, and the content mentioned in the embodiments is not a limitation of the present application.

[0044] Example 1

[0045] A water-based high-temperature-resistant inorganic nano-silicon aluminum insulating paint comprises the following raw materials by weight:

[0046]

[0047] The water-based dispersant is BYK-190 dispersant.

[0048] The water-based anti-graffiti aid is DiGu 5100 anti-graffiti aid.

[0049] The leveling agent is AMORSO-328 leveling agent produced by Shanghai Jiyanchi Industry Co., Ltd. The defoaming agent is Silok-4075 defoaming agent.

[0050] The cosolvent is ethylene glycol monobutyl ether.

[0051] The neutralizing agent is Haimings DMAE ammonia neutralizing agent.

[0052] The water-based nano-resin comprises the following raw materials by weight:

[0053]

[0054]

[0055] The catalyst is a mixture of formic acid and acetic acid in a mass ratio of 2:1.

[0056] The wetting leveling agent is DiGu 4100 leveling agent.

[0057] The color paste comprises the following raw materials by weight:

[0058]

[0059] The aid is Haimingsdeqian 299 water-based thickening agent.

[0060] The color powder is copper-chromium black powder.

[0061] The dispersant is BYK-190 dispersant.

[0062] The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above comprises the following steps: 1) preparing a water-based nano-resin for standby; 2) preparing a color paste for standby; 3) stirring and mixing the water-based nano-resin and a cosolvent uniformly to obtain a first mixture; 4) mixing the water-based dispersant, the defoaming agent, the leveling agent and part of the deionized water uniformly, then adding the first mixture, stirring and mixing uniformly to obtain a second mixture; 5) adding the water-based anti-graffiti additive, the color paste and the whisker silicon into the second mixture, stirring and mixing uniformly to obtain a third mixture; 6) adding the neutralizing agent and the remaining deionized water into the third mixture, stirring and mixing uniformly to obtain the insulation coating.

[0063] The stirring speed in step 3) is 300 r / min, and the stirring time is 13 min.

[0064] The stirring speed in step 4) is 450 r / min, and the stirring time is 12 min.

[0065] The stirring speed in step 5) is 550 r / min, and the stirring time is 25 min.

[0066] The stirring speed in step 6) is 550 r / min, and the stirring time is 20 min.

[0067] The preparation of the water-based nano-resin comprises the following steps: adding the silica sol, the aluminum sol, the deionized water and the catalyst into a reaction kettle, stirring and reacting sufficiently, the stirring speed is 500 r / min, and the stirring time is 10 min; then adding the methyltrimethoxysilane, the phenyltrimethoxysilane and the tetraethyl orthosilicate, stirring and reacting sufficiently, the stirring speed is 500 r / min, and the stirring time is 2 h; after cooling, adding the wetting and leveling agent, stirring and mixing uniformly, the stirring speed is 300 r / min, and the stirring time is 5 min, to obtain the water-based nano-resin.

[0068] The preparation of the color paste comprises the following steps: adding the deionized water into a stirring kettle, adding the dispersant while stirring, stirring and mixing uniformly, the stirring speed is 80 r / min, and the stirring time is 5 min; adding the color powder and the whisker silicon while stirring, stirring and mixing uniformly, the stirring speed is 600 r / min, and the stirring time is 10 min; adding the additives while stirring, stirring and mixing uniformly, the stirring speed is 500 r / min, and the stirring time is 10 min, to obtain a semi-finished color paste; adding the semi-finished color paste into a grinder, grinding the fineness to below 10 um, to obtain the color paste.

[0069] A method for using the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above, comprising the following steps: uniformly spraying the insulation coating on the surface of the substrate to form a coating, and baking the substrate with the coating in an environment of 180℃ for 40min to obtain a dry paint film.

[0070] The coating preparation step before spraying includes stirring and dispersing the insulation coating, and then filtering with a #100 stainless steel filter screen.

[0071] The thickness of the dry paint film after spraying is controlled at 50μm.

[0072] Example 2

[0073] A water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating, comprising the following raw materials by weight:

[0074]

[0075]

[0076] The water-based dispersant is BYK-190 dispersant.

[0077] The water-based anti-graffiti additive is Diago 5100 anti-graffiti additive.

[0078] The leveling agent is AMORSO-328 leveling agent produced by Shanghai Jirun Industry Co., Ltd. The defoaming agent is Silok-4075 defoaming agent.

[0079] The cosolvent is ethylene glycol monobutyl ether.

[0080] The neutralizing agent is Hymens DMAE ammonia neutralizing agent.

[0081] The water-based nano-resin comprises the following raw materials by weight:

[0082]

[0083] The catalyst is a mixture of formic acid and acetic acid in a mass ratio of 1:1.

[0084] The wetting leveling agent is Diago 4100 leveling agent.

[0085] The color paste comprises the following raw materials by weight:

[0086]

[0087] The additive is Hymens Tecnic 299 water-based thickening agent.

[0088] The toner is copper-chromium black powder.

[0089] The dispersant is BYK-190 dispersant.

[0090] The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above comprises the following steps: 1) preparing a water-based nano-resin for standby; 2) preparing a color paste for standby; 3) stirring and mixing the water-based nano-resin and a cosolvent uniformly to obtain a first mixture; 4) mixing the water-based dispersant, the defoaming agent, the leveling agent and part of the deionized water uniformly, then adding the first mixture, stirring and mixing uniformly to obtain a second mixture; 5) adding the water-based anti-graffiti additive, the color paste and the whisker silicon into the second mixture, stirring and mixing uniformly to obtain a third mixture; 6) adding the neutralizing agent and the remaining deionized water into the third mixture, stirring and mixing uniformly to obtain the insulation coating.

[0091] The stirring speed in step 3) is 350 r / min, and the stirring time is 15 min.

[0092] The stirring speed in step 4) is 470 r / min, and the stirring time is 13 min.

[0093] The stirring speed in step 5) is 580 r / min, and the stirring time is 30 min.

[0094] The stirring speed in step 6) is 600 r / min, and the stirring time is 25 min.

[0095] The preparation of the water-based nano-resin comprises the following steps: adding the silica sol, the aluminum sol, the deionized water and the catalyst into a reaction kettle, stirring and reacting sufficiently, the stirring speed is 650 r / min, and the stirring time is 20 min; then adding the methyltrimethoxysilane, the phenyltrimethoxysilane and the tetraethyl orthosilicate, stirring and reacting sufficiently, the stirring speed is 650 r / min, and the stirring time is 2.5 h; after cooling, adding the wetting and leveling agent, stirring and mixing uniformly, the stirring speed is 350 r / min, and the stirring time is 8 min, to obtain the water-based nano-resin.

[0096] The preparation of the color paste comprises the following steps: adding the deionized water into a stirring kettle, adding the dispersant while stirring, stirring and mixing uniformly, the stirring speed is 100 r / min, and the stirring time is 8 min; adding the color powder and the whisker silicon while stirring, stirring and mixing uniformly, the stirring speed is 800 r / min, and the stirring time is 20 min; adding the additive while stirring, stirring and mixing uniformly, the stirring speed is 750 r / min, and the stirring time is 20 min, to obtain a semi-finished color paste; adding the semi-finished color paste into a grinder, grinding the fineness to below 10 um, to obtain the color paste.

[0097] A method for using the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above, comprising the following steps: uniformly spraying the insulation coating on the surface of the substrate to form a coating, and baking the substrate sprayed with the coating in an environment of 200℃ for 35min to obtain a dry paint film.

[0098] The coating preparation step before spraying includes stirring and dispersing the insulation coating, and then filtering with a #150 stainless steel filter screen; when spraying, the nozzle diameter of the spray gun is 1.8mm, and the spraying pressure is 0.25MPa.

[0099] The thickness of the dry paint film after spraying is controlled at 65μm.

[0100] Example 3

[0101] A water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating, comprising the following raw materials by weight:

[0102]

[0103] The water-based dispersant is BYK-190 dispersant.

[0104] The water-based anti-graffiti aid is Diago 5100 anti-graffiti aid.

[0105] The leveling agent is AMORSO-328 leveling agent produced by Shanghai Jirun Industry Co., Ltd.

[0106] The defoaming agent is Silok-4075 defoaming agent.

[0107] The cosolvent is ethylene glycol monobutyl ether.

[0108] The neutralizing agent is Hymens DMAE ammonia neutralizing agent.

[0109] The water-based nano-resin comprises the following raw materials by weight:

[0110]

[0111] The catalyst is a mixture of formic acid and acetic acid in a mass ratio of 3:2.

[0112] The wetting leveling agent is Diago 4100 leveling agent.

[0113] The color paste comprises the following raw materials by weight:

[0114]

[0115] The aid is Hymens Tecnic 299 water-based thickening agent.

[0116] The color powder is copper-chromium black powder.

[0117] The dispersant is BYK-190 dispersant.

[0118] The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above comprises the following steps: 1) preparing a water-based nano-resin for standby; 2) preparing a color paste for standby; 3) stirring and mixing the water-based nano-resin and a cosolvent uniformly to obtain a first mixture; 4) mixing the water-based dispersant, the defoaming agent, the leveling agent and part of the deionized water uniformly, then adding the first mixture, stirring and mixing uniformly to obtain a second mixture; 5) adding the water-based anti-graffiti additive, the color paste and the whisker silicon into the second mixture, stirring and mixing uniformly to obtain a third mixture; 6) adding the neutralizing agent and the remaining deionized water into the third mixture, stirring and mixing uniformly to obtain the insulation coating.

[0119] The stirring speed in step 3) is 400 r / min, and the stirring time is 17 min.

[0120] The stirring speed in step 4) is 500 r / min, and the stirring time is 14 min.

[0121] The stirring speed in step 5) is 600 r / min, and the stirring time is 35 min.

[0122] The stirring speed in step 6) is 650 r / min, and the stirring time is 30 min.

[0123] The preparation of the water-based nano-resin comprises the following steps: adding the silica sol, the aluminum sol, the deionized water and the catalyst into a reaction kettle, stirring and reacting sufficiently, the stirring speed is 800 r / min, and the stirring time is 30 min; then adding the methyltrimethoxysilane, the phenyltrimethoxysilane and the tetraethyl orthosilicate, stirring and reacting sufficiently, the stirring speed is 800 r / min, and the stirring time is 3 h; after cooling, adding the wetting and leveling agent, stirring and mixing uniformly, the stirring speed is 400 r / min, and the stirring time is 10 min, to obtain the water-based nano-resin.

[0124] The preparation of the color paste comprises the following steps: adding the deionized water into a stirring kettle, adding the dispersant while stirring, stirring and mixing uniformly, the stirring speed is 120 r / min, and the stirring time is 10 min; adding the color powder and the whisker silicon while stirring, stirring and mixing uniformly, the stirring speed is 1000 r / min, and the stirring time is 30 min; adding the additives while stirring, stirring and mixing uniformly, the stirring speed is 1000 r / min, and the stirring time is 30 min, to obtain a semi-finished color paste; adding the semi-finished color paste into a grinder, grinding the fineness to below 10 um, to obtain the color paste.

[0125] The use method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating as described above comprises the following steps: uniformly spraying the insulation coating on the surface of a substrate to form a coating layer, and baking the substrate with the coating layer in an environment at 230 DEG C for 40 min to obtain a dry paint film.

[0126] The coating preparation step before spraying is further included: stirring and dispersing the insulation coating, and then filtering the insulation coating by using a #150 stainless steel filter screen; when spraying, the nozzle diameter of the spray gun is 2 mm, and the spraying pressure is 0.3 MPa.

[0127] The thickness of the dry paint film after spraying is controlled at 80 μm.

[0128] The dry paint films obtained in Examples 2-3 are subjected to the following performance tests, and the test results are recorded in the following table:

[0129] Test items:

[0130] 1. Adhesion test: a 3M adhesive tape with a thickness of 1 mm and a width of 10 mm is attached to the surface of the dry paint film, and a rubber eraser is used to wipe the attached area back and forth, the attached length is 3 cm, then the adhesive tape is quickly torn off at a 90 DEG angle, and the test is repeated 5 times in the same attached area, and the attached area is qualified if there is no paint and no color change.

[0131] 2. Corrosion resistance test: respectively placed in high-concentration hydrogen sulfide, hydrogen dioxide and nitrogen dioxide acid gas environments for 30 days, the surface color of the dry paint film has no change, and the dry paint film is qualified if there is no corrosion phenomenon.

[0132] 3. Salt spray test: the dry paint film is immersed in 5% neutral salt water for 500 hours, and the dry paint film is qualified if there is no bubble and no paint falling.

[0133] 4. Electrolyte resistance test: the dry paint film is immersed in battery electrolyte for 24 hours, and the coating layer has no bubble, the surface has no change, and the dry paint film is qualified if there is no color difference.

[0134] 5. Heat resistance test: the dry paint film is placed in an environment at 800 DEG C for 24 hours, and the dry paint film is qualified if there is no bubble, no crack and no powdering.

[0135] 6. Insulation test: a voltage of 3500 V is applied to the dry paint film, the current is detected, and whether the dry paint film is broken down is observed; the dry paint film is qualified if it is not broken down and the current is less than 10 mA.

[0136]

[0137]

[0138] It can be seen from the detection result that the paint film obtained by the application has super-high heat resistance, the heat resistance reaches 800 DEG C or above, in the case of high temperature or combustion, the paint layer still remains complete, has no bubble, no crack, and no powdering phenomenon, and the paint film obtained by the insulating paint has good adhesion, excellent acid corrosion resistance, electrolyte resistance and salt resistance, good insulation performance and excellent high-voltage electric shock resistance.

[0139] The above embodiment is a preferred implementation scheme of the application, and the application can also be implemented in other manners, and any obvious replacement without departing from the concept of the application is within the protection scope of the application.

Claims

1. A waterborne high temperature resistant inorganic nano-silicon aluminum insulation coating, characterized in that: The water-based nano-resin is composed of the following raw materials by weight: The water-based nano-resin is composed of the following raw materials by weight: The color paste contains the following raw materials by weight: The catalyst is a mixture of formic acid and acetic acid in a mass ratio of 2-4:1-2; the adjuvant is a thickening agent.

2. The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating according to claim 1, characterized in that: The method comprises the following steps: 1) preparing a water-based nano-resin for standby; 2) preparing a color paste for standby; 3) stirring and mixing the water-based nano-resin and the cosolvent uniformly to obtain a primary mixture; 4) mixing the water-based dispersant, the defoaming agent, the leveling agent, and part of the deionized water uniformly, then adding the primary mixture, and stirring and mixing uniformly to obtain a secondary mixture; 5) adding the water-based anti-graffiti adjuvant, the color paste, and the whisker silicon into the secondary mixture, and stirring and mixing uniformly to obtain a tertiary mixture; 6) adding the neutralizing agent and the remaining deionized water into the tertiary mixture, and stirring and mixing uniformly to obtain the insulating coating.

3. The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating according to claim 2, characterized in that: The preparation of the water-based nano-resin comprises the following steps: adding the silica sol, the aluminum sol, the deionized water, and the catalyst into a reaction kettle, and stirring and reacting sufficiently; then adding the methyltrimethoxysilane, the phenyltrimethoxysilane, and the tetraethyl orthosilicate, and stirring and reacting sufficiently; after cooling, adding the wetting and leveling agent, and stirring and mixing uniformly to obtain the water-based nano-resin.

4. The preparation method of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating according to claim 2, characterized in that: The preparation of the color paste comprises the following steps: adding the deionized water into a stirring kettle, adding the dispersant while stirring, and stirring and mixing uniformly; adding the color powder and the whisker silicon while stirring, and stirring and mixing uniformly; adding the adjuvant while stirring, and stirring and mixing uniformly to obtain a semi-finished color paste; adding the semi-finished color paste into a grinder, and grinding the fineness to less than 10 um to obtain the color paste.

5. The use of the water-based high-temperature-resistant inorganic nano-silicon aluminum insulation coating according to claim 1, characterized in that: The method comprises the following steps: The insulating coating is uniformly sprayed on the surface of the substrate to form a coating layer, the substrate with the coating layer is placed in an environment at 180-230°C for baking for 30-40 min to obtain a dry paint film.

6. The use of the waterborne high temperature resistant inorganic nano-silicon aluminum insulation coating according to claim 5, characterized in that: Before spraying, the method further comprises a coating preparation step: stirring and dispersing the insulating coating, and then filtering by using a stainless steel filter screen with a mesh size of #100-150; when spraying: the nozzle diameter of the spray gun is 1.5-2 mm, and the spraying pressure is 0.2-0.3 MPa.

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