Anti-mildew water-based paint, preparation method thereof and application of anti-mildew water-based paint in high-humidity environment

Abstract

The invention relates to the field of water-based paint, in particular to anti-mildew water-based paint as well as a preparation method and application thereof in a high-humidity environment. The mould water-based paint is prepared from the following raw materials in parts by mass: matrix resin emulsion, modified resin emulsion, a dispersing agent, a defoaming agent, a mould inhibitor, a coalescing agent, a polymer composition, deionized water and the like. The finally prepared anti-mildew water-based paint can not only realize resistance to mildew and water-based environment, but also can greatly improve the aging resistance, air permeability, corrosion resistance and other properties of the paint on this basis, solves the contradiction point of the existing water-based paint in multiple performance directions, and has a wide application prospect. Therefore, the water-based paint meets the application environment requirements of the existing water-based paint, meets the ever-increasing comprehensive performance requirements of consumers on the water-based paint, and has very wide application potential.

Description

Technical Field

[0001] The present application relates to the field of water-based coatings, and more specifically to an anti-mildew water-based coating, a preparation method thereof, and an application thereof in a high humidity environment. Background Art

[0002] With the rapid development of the construction, home and industrial fields, the demand for functional coatings is increasing, especially in humid environments or high humidity conditions, the waterproof and anti-mildew properties of coatings have become key indicators. Although traditional solvent-based coatings have good waterproofness and durability, they contain a large amount of volatile organic compounds (VOCs), which are harmful to the environment and human health. In this context, anti-mildew waterproof water-based coatings have attracted widespread attention due to their excellent performance. This coating combines the dual properties of waterproof and anti-mildew, and can effectively resist moisture penetration and mold growth. It is particularly suitable for building exterior walls, basements, bathrooms, kitchens and other places in high humidity areas or long-term exposure to humid environments.

[0003] Anti-mold and waterproof water-based paint has emerged as a new type of hybrid functional paint. This paint uses water as a solvent or dispersion medium. Compared with traditional organic solvent-based paints, it has lower volatile organic compound emissions and is more environmentally friendly. On the other hand, this type of paint can inhibit the growth of mold. Due to its excellent waterproof performance, it can effectively prevent moisture from invading the interior of the wall, thereby improving the quality and service life of the paint. In addition, anti-mold and waterproof water-based paint should also have good air permeability, allowing the gas in the wall to be discharged, further reducing the possibility of mold growth.

[0004] However, although anti-mildew and waterproof water-based coatings have made significant progress, current technologies still face some challenges. For example, durability and aging resistance are poor. Although the coatings can provide effective protection in the short term, these components may gradually become ineffective during long-term use, or the coatings may experience a significant drop in performance and coating shedding due to rapid aging. On the other hand, in actual applications, coatings are often exposed to corrosive environments, which can greatly damage the coatings, thereby rendering the anti-mildew and waterproof properties ineffective, greatly reducing the performance of the coatings. Summary of the invention

[0005] Therefore, in order to effectively solve the above existing problems, the present application provides an anti-mold water-based paint and a preparation method thereof. The anti-mold water-based paint finally prepared by the present application can not only achieve resistance to mold and water-based environment, but also can, on this basis, greatly improve the aging resistance, air permeability and corrosion resistance of the paint, solve the contradictions of the existing water-based paint in multiple performance directions, thereby adapting to the application environment requirements of the existing water-based paint, meeting the growing comprehensive performance requirements of consumers for water-based paint, and having a very wide range of application potential.

[0006] The raw materials of the anti-fungal water-based paint, calculated by mass, are: 20-35 parts of base resin emulsion, 10-20 parts of modified resin emulsion, 0.8-1.4 parts of dispersant, 0.3-0.6 parts of defoaming agent, 1-2 parts of mildewproofing agent, 2-4 parts of film-forming aid, 0.5-1.5 parts of wetting agent, 3-8 parts of polymer composition, 5-10 parts of filler and 35-55 parts of deionized water.

[0007] As a preferred embodiment, the mass ratio of the base resin emulsion, the modified resin emulsion and the polymer composition is (24-32): (11-17): (4-7).

[0008] As a preferred embodiment, the mass ratio of the base resin emulsion, the modified resin emulsion and the polymer composition is (26-30): (13-16): (5-6).

[0009] As a preferred embodiment, the base resin emulsion is an acrylic resin emulsion.

[0010] As a preferred embodiment, the solid content of the matrix resin emulsion is 45-50%.

[0011] As a preferred embodiment, the preparation method of the modified resin emulsion specifically includes the following steps: S1: adding a base resin emulsion, α-methylstyrene, hexafluorobutyl acrylate and acetoacetoxyethyl acrylate to deionized water, adding sodium dodecyl sulfate for emulsification, and stirring at a speed of 1500-2000 rpm for 30-40 minutes to obtain a pre-emulsion; S2: transferring the pre-emulsion to a reactor, replacing the air with nitrogen, heating to 75-80°C, dissolving ammonium persulfate in deionized water and slowly dripping it into the reactor through a constant pressure dropping funnel within 1-1.5 hours, controlling the reaction temperature to 70-75°C, and keeping the temperature at 75-80°C for continuous reaction for 3-4 hours after the dripping is completed; S3: cooling to room temperature after the reaction is completed, slowly dripping ammonia water to adjust the pH to 7.5-8, and then filtering through a 300-400 mesh filter to obtain.

[0012] As a preferred embodiment, the mass ratio of the base resin emulsion, α-methylstyrene, hexafluorobutyl acrylate and acetoacetoxyethyl acrylate is (8-9.5): (1.4-1.8): (0.8-1): (0.5-0.6).

[0013] As a preferred embodiment, the mass ratio of the base resin emulsion, α-methylstyrene, hexafluorobutyl acrylate and acetoacetoxyethyl acrylate is 9:1.5:0.8:0.6.

[0014] The addition of modified resin can effectively improve the waterproofness, aging resistance and corrosion resistance of anti-mold water-based coatings, and help improve its anti-mold performance in high humidity environments. The modified resin introduces methyl groups on the benzene ring to increase steric hindrance, increase the rigidity of the polymer chain, and significantly increase the glass transition temperature. The rigid surface formed can greatly reduce the physical adsorption of microorganisms (such as mold), and further hinder the thermal motion of the polymer chain segments through the methyl group, reducing the diffusion coefficient of water molecules; on the other hand, the fluorinated chain segments are enriched on the coating surface during the film formation process to form a dense fluorinated layer, thereby inhibiting the enzyme activity secreted by molds, and then the acetoacetoxy group forms an internal strong cross-linked three-dimensional network, which resists the penetration of water molecules through the denser internal cross-linked network, increases the penetration resistance and diffusion path length of water molecules, and inhibits the humidity conditions required for mold growth, thereby greatly improving the overall comprehensive performance of water-based coatings.

[0015] As a preferred embodiment, the dispersant is at least one of sodium polycarboxylate, ammonium polyacrylate, sodium styrene-maleic anhydride copolymer and fatty alcohol polyoxyethylene ether phosphate.

[0016] As a preferred embodiment, the dispersant is sodium polycarboxylate.

[0017] As a preferred embodiment, the defoaming agent is at least one of silicone defoaming agents.

[0018] As a preferred embodiment, the mildew inhibitor is a combination of benzisothiazolinone and zinc pyrithione.

[0019] As a preferred embodiment, the mass ratio of benzisothiazolinone to zinc pyrithione is (2-2.4):(0.6-1).

[0020] As a preferred embodiment, the mass ratio of benzisothiazolinone to zinc pyrithione is 2.2:0.8.

[0021] As a preferred embodiment, the film-forming aid is at least one of dipropylene glycol butyl ether, dodecanol ester, tetradecanol ester, propylene glycol phenyl ether, ethylene glycol phenyl ether and diethylene glycol monobutyl ether.

[0022] As a preferred embodiment, the film-forming aid is a composition of dodecyl alcohol ester and propylene glycol phenyl ether.

[0023] As a preferred embodiment, the mass ratio of the dodecyl alcohol ester to the propylene glycol phenyl ether is (1.5-2): (1-1.4).

[0024] As a preferred embodiment, the mass ratio of the dodecyl alcohol ester to the propylene glycol phenyl ether is 1.8:1.2.

[0025] As a preferred embodiment, the wetting agent is at least one of alkylphenol polyoxyethylene ether, polyoxyethylene sorbitan monolaurate, dioctyl sulfosuccinate sodium salt or non-ionic polyether modified siloxane.

[0026] As a preferred embodiment, the wetting agent is nonylphenol polyoxyethylene ether-10.

[0027] As a preferred embodiment, the polymer composition is a composition of polyurethane, water-based epoxy emulsion and polyester polyol.

[0028] As a preferred embodiment, the solid content of the aqueous epoxy emulsion is 35-40%. As a preferred embodiment, the weight average molecular weight of the aqueous epoxy emulsion is 1500~3000Da.

[0029] As a preferred embodiment, the polyester polyol is an isophthalic acid-based polyester polyol.

[0030] As a preferred embodiment, the mass ratio of the polyurethane, the aqueous epoxy emulsion and the polyester polyol is (3-4): (2-2.5): (1.4-1.6).

[0031] As a preferred embodiment, the filler is pretreated talcum powder.

[0032] As a preferred embodiment, the preparation method of the pretreated talc powder specifically comprises the following steps: mixing talc powder with stearic acid, stirring at a high speed of 1000-1200 rpm at 80-90° C. for 1-2 hours, and grinding to a desired particle size after drying.

[0033] As a preferred embodiment, the mass ratio of talc to stearic acid is (8-9): (1-1.5).

[0034] As a preferred embodiment, the D50 particle size of the pretreated talc is 4-5.5 μm.

[0035] The present application also provides a method for preparing the above-mentioned antifungal water-based coating, which specifically includes the following steps: S1: mixing deionized water, dispersant, wetting agent and defoaming agent, stirring at 500-600 rpm for 20-30 minutes, then adding filler, increasing the rotation speed to 1300-1500 rpm, and stirring and dispersing at high speed for 30-35 minutes; S2: adding the remaining materials except the polymer composition, stirring at 300-400 rpm for 20-30 minutes, and finally adding the polymer composition, adjusting the viscosity to KU=90-100, and after completion, controlling the pH value to 8-8.5, and then filtering to remove large particles and agglomerates to obtain.

[0036] The present application further limits the use of the anti-mildew water-based coating in high humidity environments such as bathrooms, kitchens and basements.

[0037] The beneficial effects of this application are: 1. The anti-mildew water-based paint provided in the present application can not only achieve resistance to mildew and aqueous environments, but also, on this basis, greatly improve the aging resistance, air permeability and corrosion resistance of the paint, thereby resolving the contradictions in multiple performance directions of existing water-based paints, thereby adapting to the application environment requirements of existing water-based paints, and meeting consumers' growing comprehensive performance requirements for water-based paints, and has very broad application potential.

[0038] 2. The antifungal water-based paint provided in the present application can effectively improve the waterproofness, aging resistance and corrosion resistance of the antifungal water-based paint by adding modified resin, and help improve its antifungal performance in high humidity environment. The modified resin introduces methyl groups on the benzene ring to increase the steric hindrance, improve the rigidity of the polymer chain, and significantly increase the glass transition temperature. The rigid surface formed can greatly reduce the physical adsorption of microorganisms (such as mold), and further hinder the thermal motion of the polymer chain segment through the methyl group, reducing the diffusion coefficient of water molecules.

[0039] 3. The anti-fungal water-based paint provided in the present application has a modified resin added thereto that can also be enriched on the coating surface through fluorinated segments during the film-forming process to form a dense fluorinated layer, thereby inhibiting the activity of enzymes secreted by molds, and then forming an internal strongly cross-linked three-dimensional network through the action of acetoacetoxy groups. The denser internal cross-linked network resists the penetration of water molecules, increases the penetration resistance and diffusion path length of water molecules, and inhibits the humidity conditions required for mold growth, thereby greatly improving the overall comprehensive performance of the water-based paint. DETAILED DESCRIPTION

[0040] In the specific implementation manner, specific implementation cases will be used to more intuitively display and illustrate the contents of the invention content of this application.

[0041] Example 1: Antifungal water-based paint, the raw materials are, by mass: 30 parts of base resin emulsion, 15 parts of modified resin emulsion, 0.9 parts of dispersant, 0.4 parts of defoaming agent, 1.4 parts of mildewproofing agent, 3.2 parts of film-forming aid, 0.8 parts of wetting agent, 5.8 parts of polymer composition, 5.6 parts of filler, and 40 parts of deionized water.

[0042] The matrix resin emulsion is an acrylic resin emulsion with a solid content of 50%, and is purchased from BASF of Germany, and is a product of model Acronal® S 760.

[0043] The preparation method of the modified resin emulsion specifically comprises the following steps, based on mass parts: S1: 90 parts of base resin emulsion, 15 parts of α-methylstyrene, 8 parts of hexafluorobutyl acrylate and 6 parts of acetoacetoxyethyl acrylate are mixed and added into 20 parts of deionized water, 0.3 parts of sodium dodecyl sulfate is added for emulsification, and the mixture is stirred at a speed of 1600 rpm for 32 minutes to obtain a pre-emulsion; S2: the pre-emulsion is transferred to a reactor, nitrogen is passed to replace the air, the temperature is raised to 75°C, 0.5 parts of ammonium persulfate is dissolved in 5 parts of deionized water, and the mixture is slowly dripped into the reactor through a constant pressure dropping funnel within 1.5 hours, the reaction temperature is controlled to be 70°C, and after the dripping is completed, the mixture is kept at 75°C for continuous reaction for 4 hours; S3: after the reaction is completed, the mixture is cooled to room temperature, ammonia water is slowly dripped to adjust the pH to 7.8, and then filtered through a 300-mesh filter to obtain the product.

[0044] The dispersant is sodium polycarboxylate, purchased from Nanjing Chuhai New Material Technology Co., Ltd., China, model DP5040; the defoamer is BYK-019; and the mildew preventer is a combination of benzisothiazolinone and zinc pyrithione, with a mass ratio of 2.2:0.8.

[0045] The film-forming aid is a composition of dodecyl alcohol ester and propylene glycol phenyl ether, with a mass ratio of 1.8:1.2.

[0046] The wetting agent is nonylphenol polyoxyethylene ether-10.

[0047] The polymer composition is a composition of polyurethane, water-based epoxy emulsion and polyester polyol, with a mass ratio of 3.8:2.2:1.5.

[0048] Polyurethane purchased the RM-2020 model product sold by Dow Chemical Company of the United States.

[0049] The waterborne epoxy emulsion had a solid content of 40% and was purchased from Shandong Poly Chemical Co., Ltd., China, and was sold as model WB6001.

[0050] The polyester polyol is an isophthalic acid type polyester polyol.

[0051] The preparation method of pretreated talc powder as a filler specifically comprises the following steps, based on mass parts: 9 parts of talc powder and 1.2 parts of stearic acid are mixed, stirred at 1000 rpm at 85° C. for 1 hour, and ground to D50=4.5 μm after drying.

[0052] The preparation method of anti-mildew water-based paint specifically includes the following steps: S1: deionized water, dispersant, wetting agent and defoamer are mixed, stirred at 600 rpm for 25 minutes, then fillers are added, the rotation speed is increased to 1500 rpm, and high-speed stirring and dispersion is performed for 30 minutes; S2: remaining materials except the polymer composition are added, stirred at 300 rpm for 20 minutes, and finally the polymer composition is added, the viscosity is adjusted to KU=100, and the pH value is controlled to 8 after completion, and then large particles and agglomerates are removed by filtering to obtain the paint.

[0053] Example 2: This example differs from Example 1 only in the following: The raw materials of the antifungal water-based paint, in parts by mass, are: 32 parts of base resin emulsion, 11 parts of modified resin emulsion, 0.9 parts of dispersant, 0.3 parts of defoaming agent, 1.1 parts of mildewproofing agent, 3.4 parts of film-forming aid, 0.9 parts of wetting agent, 6.5 parts of polymer composition, 6.1 parts of filler, and 40 parts of deionized water.

[0054] Example 3: This example differs from Example 1 only in the following: The raw materials of the antifungal water-based paint, in parts by mass, are: 25 parts of base resin emulsion, 17 parts of modified resin emulsion, 0.8 parts of dispersant, 0.4 parts of defoaming agent, 1.2 parts of mildewproofing agent, 2.8 parts of film-forming aid, 0.6 parts of wetting agent, 4.5 parts of polymer composition, 5.2 parts of filler, and 35 parts of deionized water.

[0055] Comparative Example 1 The only difference between this comparative example and Example 1 is as follows: the raw materials of the antifungal water-based paint, in parts by mass, are: 42 parts of base resin emulsion, 3 parts of modified resin emulsion, 0.9 parts of dispersant, 0.4 parts of defoaming agent, 1.4 parts of mildewproofing agent, 3.2 parts of film-forming aid, 0.8 parts of wetting agent, 5.8 parts of polymer composition, 5.6 parts of filler, and 40 parts of deionized water.

[0056] Comparative Example 2 The only difference between this comparative example and Example 1 is as follows: the raw materials of the antifungal water-based paint, in parts by mass, are: 30 parts of base resin emulsion, 15 parts of modified resin emulsion, 0.9 parts of dispersant, 0.4 parts of defoaming agent, 1.4 parts of mildewproofing agent, 3.2 parts of film-forming aid, 0.8 parts of wetting agent, 1.5 parts of polymer composition, 5.6 parts of filler, and 40 parts of deionized water.

[0057] Comparative Example 3 The only difference between this comparative example and Example 1 is that the polymer composition is a composition of polyurethane, water-based epoxy emulsion and polyester polyol, with a mass ratio of 1:3:2.

[0058] Comparative Example 4 The only difference between this comparative example and Example 1 is that the polymer composition is a composition of polyurethane, water-based epoxy emulsion and polyester polyol, and the mass ratio is 5:1:0.2.

[0059] Comparative Example 5 The only difference between this comparative example and Example 1 is as follows: the preparation method of the modified resin emulsion, calculated by mass, specifically comprises the following steps: S1: 120 parts of base resin emulsion, 10 parts of α-methylstyrene, 3 parts of hexafluorobutyl acrylate and 1.5 parts of acetoacetoxyethyl acrylate are mixed and added to 20 parts of deionized water, 0.3 parts of sodium dodecyl sulfate is added for emulsification, and the mixture is stirred at 1600 rpm for 32 minutes to obtain a pre-emulsion; S2: the pre-emulsion is transferred to a reactor, nitrogen is passed to replace the air, the temperature is raised to 75°C, 0.5 parts of ammonium persulfate is dissolved in 5 parts of deionized water, and then the mixture is slowly added to the reactor through a constant pressure dropping funnel within 1.5 hours, the reaction temperature is controlled to 70°C, and after the addition is completed, the mixture is kept at 75°C for continuous reaction for 4 hours; S3: after the reaction is completed, the mixture is cooled to room temperature, ammonia water is slowly added to adjust the pH to 7.8, and then filtered through a 300-mesh filter to obtain the mixture.

[0060] Comparative Example 6 The only difference between this comparative example and Example 1 is as follows: the preparation method of the modified resin emulsion, calculated by mass, specifically comprises the following steps: S1: 60 parts of base resin emulsion, 25 parts of α-methylstyrene, 14 parts of hexafluorobutyl acrylate and 12 parts of acetoacetoxyethyl acrylate are mixed and added to 20 parts of deionized water, 0.3 parts of sodium dodecyl sulfate are added for emulsification, and the mixture is stirred at 1600 rpm for 32 minutes to obtain a pre-emulsion; S2: the pre-emulsion is transferred to a reactor, nitrogen is passed to replace the air, the temperature is raised to 75°C, 0.5 parts of ammonium persulfate are dissolved in 5 parts of deionized water, and then the mixture is slowly added to the reactor through a constant pressure dropping funnel within 1.5 hours, the reaction temperature is controlled to 70°C, and after the addition is completed, the mixture is kept at 75°C for continuous reaction for 4 hours; S3: after the reaction is completed, the mixture is cooled to room temperature, ammonia water is slowly added to adjust the pH to 7.8, and then filtered through a 300-mesh filter to obtain the mixture.

[0061] Performance Evaluation 1. The water-resistant properties of the cured coatings of the water-based coatings prepared in the examples and comparative examples were tested with reference to ASTM D7334. The results were averaged from 10 tests and recorded in Table 1.

[0062] 2. The cured coatings of the water-based coatings prepared in the examples and comparative examples were tested for mildew resistance in accordance with ASTM G21. The results were averaged from 10 tests and recorded in Table 1.

[0063] 3. The cured coatings of the waterborne coatings prepared in the examples and comparative examples were tested for aging resistance with reference to ISO 11341. The results were averaged from 10 tests and recorded in Table 1.

[0064] 4. The cured coatings of the waterborne coatings prepared in the examples and comparative examples were tested for corrosion resistance with reference to ASTM B117. The results were averaged from 10 tests and recorded in Table 1.

[0065] Table 1 Performance test results

[0066] From the final performance test results of the embodiments and comparative examples, embodiments 1-3 achieved excellent results in waterproofing and mildew resistance.

[0067] In Comparative Examples 1-2, the mass ratio of the base resin emulsion, the modified resin emulsion and the polymer composition was adjusted, and the results showed that the water contact angle, gloss retention rate and corrosion width effects decreased to varying degrees compared with Examples 1-3; in Comparative Examples 3-4, the mass ratio of the aqueous epoxy emulsion and the polyester polyol composition was changed, and in Comparative Examples 5-6, the specific method of modifying the resin emulsion was changed, and the water contact angle, mildew resistance level, gloss retention rate and corrosion width effects were all worse than those of Examples 1-3. The above comparative experiments prove the superiority of the technical solution of the present invention.

Claims

1. An antifungal water-based paint, characterized in that: The raw materials are as follows: 20-35 parts of base resin emulsion, 10-20 parts of modified resin emulsion, 0.8-1.4 parts of dispersant, 0.3-0.6 parts of defoamer, 1-2 parts of mildewproofing agent, 2-4 parts of film-forming aid, 0.5-1.5 parts of wetting agent, 3-8 parts of polymer composition, 5-10 parts of filler, and 35-55 parts of deionized water. The matrix resin emulsion is an acrylic resin emulsion with a solid content of 45-50%; The preparation method of modified resin emulsion specifically comprises the following steps: S1: adding base resin emulsion, α-methylstyrene, hexafluorobutyl acrylate and acetoacetoxyethyl acrylate to deionized water, adding sodium dodecyl sulfate for emulsification, stirring at a speed of 1500-2000 rpm for 30-40 minutes to obtain pre-emulsion; S2: transferring the pre-emulsion to a reactor, replacing air with nitrogen, heating to 75-80°C, dissolving ammonium persulfate in deionized water and slowly dripping it into the reactor through a constant pressure dropping funnel within 1-1.5 hours, controlling the reaction temperature to 70-75°C, and keeping the temperature at 75-80°C for continuous reaction for 3-4 hours after the dripping is completed; S3: cooling to room temperature after the reaction is completed, slowly dripping ammonia water to adjust the pH to 7.5-8, and then filtering through a 300-400 mesh filter to obtain; The mass ratio of the base resin emulsion, α-methylstyrene, hexafluorobutyl acrylate and acetoacetoxyethyl acrylate is (8-9.5): (1.4-1.8): (0.8-1): (0.5-0.6).

2. The antifungal water-based paint according to claim 1, characterized in that: The mass ratio of the base resin emulsion, the modified resin emulsion and the polymer composition is (24-32): (11-17): (4-7).

3. The antifungal water-based paint according to claim 2, characterized in that: The dispersant is at least one of sodium polycarboxylate, ammonium polyacrylate, sodium styrene-maleic anhydride copolymer and fatty alcohol polyoxyethylene ether phosphate.

4. The antifungal water-based paint according to claim 3, characterized in that: The mildew preventer is a composition of benzisothiazolinone and zinc pyrithione, with a mass ratio of (2-2.4): (0.6-1).

5. The antifungal water-based paint according to claim 4, characterized in that: The film-forming aid is at least one of dipropylene glycol butyl ether, dodecanol ester, tetradecanol ester, propylene glycol phenyl ether, ethylene glycol phenyl ether and diethylene glycol monobutyl ether.

6. The antifungal water-based paint according to claim 5, characterized in that: The film-forming aid is a composition of dodecyl alcohol ester and propylene glycol phenyl ether, with a mass ratio of (1.5-2): (1-1.4).

7. The antifungal water-based paint according to claim 6, characterized in that: The polymer composition is a composition of polyurethane, water-based epoxy emulsion and polyester polyol, with a mass ratio of (3-4): (2-2.5): (1.4-1.6).

8. The antifungal water-based paint according to claim 7, characterized in that: The solid content of the waterborne epoxy emulsion is 35-40%; the weight average molecular weight of the waterborne epoxy emulsion is 1500-3000Da; and the polyester polyol is an isophthalic acid type polyester polyol.

9. A method for preparing the antifungal water-based coating according to any one of claims 1 to 8, characterized in that: The specific steps include: S1: Mix deionized water, dispersant, wetting agent and defoamer, stir at 500-600rpm for 20-30min, then add filler, increase the speed to 1300-1500rpm, and stir and disperse at high speed for 30-35min; S2: Add the remaining materials except the polymer composition, stir at 300-400rpm for 20-30min, and finally add the polymer composition, adjust the viscosity to KU=90-100, and after completion, control the pH value to 8-8.5, and then filter to remove large particles and agglomerates.

10. Use of the antifungal water-based paint according to any one of claims 1 to 8 in high humidity environments such as bathrooms, kitchens and basements.

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