A moisture-proof and stain-resistant acrylic resin coating and its preparation process

Abstract

This invention belongs to the field of coating technology, specifically relating to a moisture-proof and stain-resistant acrylic resin coating and its preparation process. The moisture-proof and stain-resistant acrylic resin coating comprises 100 parts by weight of a main agent and 20-25 parts by weight of a curing agent. The main agent comprises the following raw materials in weight percentages: dispersant 1.5-3%, butyl acetate 10-15%, xylene 5-10%, filler 10-20%, titanium dioxide 10-20%, carbon black 1-5%, cellulose acetate butyrate 1-2%, anti-settling agent 1-1.5%, leveling agent 0.5-1%, defoamer 0.1-0.5%, with the balance being acrylic resin. The moisture-proof and stain-resistant acrylic resin coating of this invention exhibits excellent comprehensive performance, high filling and sealing properties, strong adhesion to alloys, and good stain resistance, water resistance, and gloss retention.

Description

Technical Field

[0001] This invention belongs to the field of coating technology, specifically relating to a moisture-proof and stain-resistant acrylic resin coating and its preparation process. Background Technology

[0002] No-grind sealing paint is a special coating that can achieve multiple effects such as surface sealing, moisture protection, and stain protection without grinding. It can be widely used in the decoration and protection of automobiles, industrial machinery and equipment, etc.

[0003] However, traditional acrylic coatings still face several technical bottlenecks when applied to automotive alloy substrates. First, the low surface energy of the alloy surface leads to insufficient coating adhesion, making it prone to interfacial damage, especially in humid environments, thus affecting long-term protective performance. Second, the relatively poor molecular density of conventional acrylic coatings results in insufficient filling and sealing of the substrate, making it difficult to effectively block the penetration of corrosive media such as moisture and chloride ions, thus limiting water resistance and moisture-proof performance. While existing technologies have attempted to improve performance by adding waterproofing agents or modifying resins, these often compromise the coating's gloss retention.

[0004] Therefore, there is an urgent need to develop an acrylic resin coating that combines excellent adhesion, filling and sealing properties, water resistance, gloss retention, and anti-fouling functions to meet the demand for multifunctional integrated coating materials in the high-end metal protection field. Summary of the Invention

[0005] The purpose of this invention is to provide a moisture-proof and stain-resistant acrylic resin coating and its preparation process.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A moisture-proof and stain-resistant acrylic resin coating comprises 100 parts by weight of a main agent and 20-25 parts by weight of a curing agent; the main agent comprises the following raw materials in weight percentages: dispersant 1.5-3%, butyl acetate 10-15%, xylene 5-10%, filler 10-20%, titanium dioxide 10-20%, carbon black 1-5%, cellulose acetate butyrate 1-2%, anti-settling agent 1-1.5%, leveling agent 0.5-1%, defoamer 0.1-0.5%, and the balance being acrylic resin.

[0008] Preferably, the acrylic resin comprises hydroxyl acrylic resin, modified hydroxyl acrylic resin and thermosetting acrylic resin in a mass ratio of (1.2-1.5):1:(0.4-0.7).

[0009] Preferably, the solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g.

[0010] Preferably, the modified hydroxyl acrylic resin has a viscosity of 2000-5000 cps at 30°C, an acid value of 6-12 mgKOH / g, and a solid hydroxyl value of 80 mgKOH / g.

[0011] Preferably, the thermosetting acrylic resin has a viscosity of 2000-6000 cps at 30°C, an acid value of less than 8 mg KOH / g, and a solid hydroxyl value of 70 mg KOH / g.

[0012] This invention improves the adhesion of coatings to alloys by using a specific type of acrylic resin in a compound. Analysis shows that the functional groups in the compounded acrylic resin can form abundant hydrogen bonds and even chemical bonds with the alloy surface, thus achieving excellent adhesion. Simultaneously, the use of a specific type of acrylic resin in the compound improves the water resistance of the coating; after the three acrylic resins cross-link and cure, they form a dense network structure that effectively blocks the penetration of water molecules.

[0013] Preferably, the method for preparing the dispersant includes the following steps:

[0014] (1) Add pentadecylphenol, acrylic acid, catalyst, polymerization inhibitor and toluene to a dry four-necked flask, mix well, heat to reflux, react for 6-10 h, cool, wash, retain the organic phase, remove the solvent to obtain pentadecylphenyl acrylate;

[0015] (2) Add methacrylic acid, butyl acrylate, pentadecyl phenyl acrylate and toluene to the reactor, purge with nitrogen, heat to 75-80℃ to obtain the reaction system, dissolve the initiator and chain transfer agent in toluene, add dropwise to the reaction system, after the dropwise addition is complete, keep the reaction at 75-80℃ for 4-5 hours, cool to room temperature, discharge the material to obtain the dispersant.

[0016] Preferably, the mass ratio of methacrylic acid, butyl acrylate, and pentadecylbenzene acrylate is 4:(30-31):(4-5).

[0017] The use of the above-mentioned dispersant in the coating system of this invention can improve the filling and sealing properties of the coating. This invention reacts pentadecylphenol with acrylic acid to first synthesize pentadecylphenyl acrylate, which serves as a precursor for the "anchoring group" in subsequent polymerization. Then, pentadecylphenyl acrylate is copolymerized with methacrylic acid and butyl acrylate in a solvent to generate a random copolymer with an amphiphilic structure. The dispersant prepared by this invention provides excellent wetting and dispersing effects on the surface of fillers, pigments, and other particles, ensuring that these particles are uniformly and stably suspended in the resin. This results in a dense, defect-free paint film during film formation, significantly improving the filling and sealing effects. Simultaneously, because the dispersant of this invention better disperses pigments, fillers, and other particles, it reduces particle agglomeration, resulting in a smooth paint film surface and improved gloss.

[0018] Preferably, the filler is hollow microspheres.

[0019] Preferably, the curing agent is an aliphatic polyisocyanate curing agent.

[0020] A preparation process for a moisture-proof and stain-resistant acrylic resin coating includes the following steps:

[0021] (1) Mix acrylic resin, some dispersant, butyl acetate, xylene, filler, titanium dioxide, and carbon black, grind, and continue to add the remaining dispersant, cellulose acetate butyrate, anti-settling agent, leveling agent, and defoamer, mix evenly to obtain the main agent;

[0022] (2) The main agent and the curing agent are packaged separately to obtain a moisture-proof and stain-proof acrylic resin coating.

[0023] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0024] 1. This invention improves the adhesion of coatings to alloys by using a specific type of acrylic resin in a compound formulation. The groups in the compounded acrylic resin can form abundant hydrogen bonds and even chemical bonds with the alloy surface, thus achieving excellent adhesion. Simultaneously, the use of a specific type of acrylic resin in the compound formulation improves the water resistance of the coating. After the three acrylic resins cross-link and cure, they form a dense network structure that effectively blocks the penetration of water molecules.

[0025] 2. The use of the above-mentioned dispersant in the coating system of the present invention can improve the filling and sealing properties of the coating. The dispersant prepared by the present invention can play an excellent role in wetting and dispersing the fillers and pigments, so that these particles are uniformly and stably suspended in the resin, thereby forming a dense and defect-free paint film during film formation, greatly improving the filling and sealing effects. At the same time, because the dispersant of the present invention disperses pigments and fillers better, reduces particle agglomeration, and makes the paint film surface smoother, it improves gloss. Detailed Implementation

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] All raw materials used in the following embodiments of the present invention are commercially available products:

[0028] 3-Pentadecylphenol, CAS: 501-24-6, Jinan Qiansheng Chemical Co., Ltd.

[0029] Curing agent, model: Bayer curing agent N3390 BA / SN. Covestro Polymers (China) Co., Ltd.

[0030] Hollow microspheres, model number HS60, from Zhengzhou Shenglait Hollow Microsphere New Material Co., Ltd.

[0031] Titanium dioxide, Nanjing Tianxing New Materials Co., Ltd., model TSP-H10.

[0032] Carbon black, model N330, Jinan Zhongbei Fine Chemical Co., Ltd.

[0033] Cellulose acetate butyrate, product number C293125, Shanghai Aladdin Biochemical Technology Co., Ltd.

[0034] Anti-settling agent, model AKN-7010, Foshan Qianyou Chemical Co., Ltd.

[0035] Leveling agent, model AKN-3600, Foshan Qianyou Chemical Co., Ltd.

[0036] Defoamer, model AKN-3483, Foshan Qianyou Chemical Co., Ltd.

[0037] Example 1

[0038] This embodiment provides a moisture-proof and stain-resistant acrylic resin coating, comprising 100 parts by weight of a main agent and 25 parts by weight of a curing agent; the main agent comprises the following raw materials by weight percentage: dispersant 2%, butyl acetate 12%, xylene 8%, hollow microspheres 14%, titanium dioxide 16%, carbon black 4%, cellulose acetate butyrate 1.6%, anti-settling agent 1.2%, leveling agent 0.7%, defoamer 0.4%, and the balance being acrylic resin.

[0039] The acrylic resin includes hydroxyl acrylic resin, modified hydroxyl acrylic resin and thermosetting acrylic resin in a mass ratio of 1.3:1:0.6.

[0040] The solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g. Brand: Mitsui Chemicals, Japan; Model: Hydroxy Acrylic Resin OLESTER Q850.

[0041] The modified hydroxyl acrylic resin has a viscosity of 2000-5000 cps at 30℃, an acid value of 6-12 mgKOH / g, and a solid hydroxyl value of 80 mgKOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: MR1655.

[0042] The thermosetting acrylic resin has a viscosity of 2000-6000 cps at 30℃, an acid value of less than 8 mg KOH / g, and a solid hydroxyl value (OH) of 70 mg KOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: KDD®MR1636.

[0043] The method for preparing the dispersant includes the following steps:

[0044] (1) Add 304g pentadecylphenol, 108g acrylic acid, 6g catalyst (p-toluenesulfonic acid), 4g polymerization inhibitor (hydroquinone) and 200mL toluene to a dry four-necked flask (one neck of the four-necked flask is connected to the lower end of the water separator, and the lower end of the condenser is connected to the upper end of the water separator; the upper end of the water separator is connected to the outlet of the water separator). Stir until all solid substances are dissolved, mix evenly, heat to reflux, reaction temperature 115℃, reaction for 8h. The water produced by the reaction will form an azeotrope with toluene and evaporate. After condensation, drop it into the water separator. After the reaction is completed, the reaction product is obtained. Cool to 65℃, add 20mL of water, then wash the reaction solution with 5wt% sodium hydroxide aqueous solution until neutral, then wash with water 3 times, separate the aqueous phase, retain the organic phase, and dry with anhydrous magnesium sulfate for 12h. Filter to remove anhydrous magnesium sulfate. Distill the filtrate at atmospheric pressure to recover acrylic acid and most of the toluene. Finally, perform vacuum distillation to distill off the residual toluene to obtain the product pentadecylphenyl acrylate.

[0045] (2) Add 40g of methacrylic acid, 307.2g of butyl acrylate, 48g of pentadecylbenzene acrylate and 200g of toluene to the reactor, purge with nitrogen for 30min, heat to 78℃ to obtain the reaction system, dissolve 4.0g of initiator (azobisisobutyronitrile) and 3.2g of chain transfer agent (dodecyl mercaptan) in 200g of toluene, and add it to the reaction system at a rate of 2 drops / s. After the addition is complete, continue to keep the reaction at 78℃ for 5h, cool to room temperature, and discharge to obtain the dispersant.

[0046] The preparation process of the above-mentioned moisture-proof and stain-resistant acrylic resin coating includes the following steps:

[0047] (1) Mix acrylic resin, 1 / 3 of the dispersant, butyl acetate, xylene, hollow microspheres, titanium dioxide, and carbon black, grind until the fineness of the slurry is less than 10 μm, and continue to add the remaining dispersant, cellulose acetate butyrate, anti-settling agent, leveling agent, and defoamer, mix evenly to obtain the main agent;

[0048] (2) The main agent and the curing agent are packaged separately to obtain a moisture-proof and stain-proof acrylic resin coating.

[0049] Example 2

[0050] This embodiment provides a moisture-proof and stain-resistant acrylic resin coating, comprising 100 parts by weight of a main agent and 25 parts by weight of a curing agent; the main agent comprises the following raw materials by weight percentage: dispersant 2%, butyl acetate 12%, xylene 8%, hollow microspheres 14%, titanium dioxide 16%, carbon black 4%, cellulose acetate butyrate 1.6%, anti-settling agent 1.2%, leveling agent 0.7%, defoamer 0.4%, and the balance being acrylic resin.

[0051] The acrylic resin includes hydroxyl acrylic resin, modified hydroxyl acrylic resin and thermosetting acrylic resin in a mass ratio of 1.2:1:0.7.

[0052] The solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g. Brand: Mitsui Chemicals, Japan; Model: Hydroxy Acrylic Resin OLESTER Q850.

[0053] The modified hydroxyl acrylic resin has a viscosity of 2000-5000 cps at 30℃, an acid value of 6-12 mgKOH / g, and a solid hydroxyl value of 80 mgKOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: MR1655.

[0054] The thermosetting acrylic resin has a viscosity of 2000-6000 cps at 30℃, an acid value of less than 8 mg KOH / g, and a solid hydroxyl value (OH) of 70 mg KOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: KDD®MR1636. KDD®MR1636 is a general-purpose adhesion-enhancing resin polymerized from special monomers.

[0055] The method for preparing the dispersant includes the following steps:

[0056] (1) Add 304g pentadecylphenol, 108g acrylic acid, 6g catalyst (p-toluenesulfonic acid), 4g polymerization inhibitor (hydroquinone) and 200mL toluene to a dry four-necked flask (one neck of the four-necked flask is connected to the lower end of the water separator, and the lower end of the condenser is connected to the upper end of the water separator; the upper end of the water separator is connected to the outlet of the water separator). Stir until all solid substances are dissolved, mix evenly, heat to reflux, reaction temperature 115℃, reaction for 8h. The water produced by the reaction will form an azeotrope with toluene and evaporate. After condensation, drop it into the water separator. After the reaction is completed, the reaction product is obtained. Cool to 65℃, add 20mL of water, then wash the reaction solution with 5wt% sodium hydroxide aqueous solution until neutral, then wash with water 3 times, separate the aqueous phase, retain the organic phase, and dry with anhydrous magnesium sulfate for 12h. Filter to remove anhydrous magnesium sulfate. Distill the filtrate at atmospheric pressure to recover acrylic acid and most of the toluene. Finally, perform vacuum distillation to distill off the residual toluene to obtain the product pentadecylphenyl acrylate.

[0057] (2) Add 40g of methacrylic acid, 307.2g of butyl acrylate, 48g of pentadecylbenzene acrylate and 200g of toluene to the reactor, purge with nitrogen for 30min, heat to 80℃ to obtain the reaction system, dissolve 4.0g of initiator (azobisisobutyronitrile) and 3.2g of chain transfer agent (dodecyl mercaptan) in 200g of toluene, and add it to the reaction system at a rate of 2 drops / s. After the addition is complete, continue to keep the reaction at 78℃ for 5h, cool to room temperature, and discharge to obtain the dispersant.

[0058] The preparation process of the above-mentioned moisture-proof and stain-resistant acrylic resin coating includes the following steps:

[0059] (1) Mix acrylic resin, 1 / 3 of the dispersant, butyl acetate, xylene, hollow microspheres, titanium dioxide, and carbon black, grind until the fineness of the slurry is less than 10 μm, and continue to add the remaining dispersant, cellulose acetate butyrate, anti-settling agent, leveling agent, and defoamer, mix evenly to obtain the main agent;

[0060] (2) The main agent and the curing agent are packaged separately to obtain a moisture-proof and stain-proof acrylic resin coating.

[0061] Comparative Example 1

[0062] The difference between this comparative example and Example 1 is that the hydroxyl acrylic resin model has been replaced with MACRYNAL® SM516 / 70BAC. (Source: Zhanxin Resin (China) Co., Ltd.)

[0063] Comparative Example 2

[0064] The difference between this comparative example and Example 1 is that the acrylic resin includes hydroxyl acrylic resin and modified hydroxyl acrylic resin in a mass ratio of 1.3:1.

[0065] The solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g. Brand: Mitsui Chemicals, Japan; Model: Hydroxy Acrylic Resin OLESTER Q850.

[0066] The modified hydroxyl acrylic resin has a viscosity of 2000-5000 cps at 30℃, an acid value of 6-12 mgKOH / g, and a solid hydroxyl value of 80 mgKOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: MR1655.

[0067] Comparative Example 3

[0068] The difference between this comparative example and Example 1 is that the acrylic resin includes hydroxyl acrylic resin, modified hydroxyl acrylic resin and thermosetting acrylic resin in a mass ratio of 1.1:1.1:0.8.

[0069] The solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g. Brand: Mitsui Chemicals, Japan; Model: Hydroxy Acrylic Resin OLESTER Q850.

[0070] The modified hydroxyl acrylic resin has a viscosity of 2000-5000 cps at 30℃, an acid value of 6-12 mgKOH / g, and a solid hydroxyl value of 80 mgKOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: MR1655.

[0071] The thermosetting acrylic resin has a viscosity of 2000-6000 cps at 30℃, an acid value of less than 8 mg KOH / g, and a solid hydroxyl value (OH) of 70 mg KOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: KDD®MR1636. KDD®MR1636 is a general-purpose adhesion-enhancing resin polymerized from special monomers.

[0072] Comparative Example 4

[0073] The difference between this comparative example and Example 1 is that the acrylic resin includes hydroxyl acrylic resin, modified hydroxyl acrylic resin and thermosetting acrylic resin in a mass ratio of 1.6:0.9:0.3.

[0074] The solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g. Brand: Mitsui Chemicals, Japan; Model: Hydroxy Acrylic Resin OLESTER Q850.

[0075] The modified hydroxyl acrylic resin has a viscosity of 2000-5000 cps at 30℃, an acid value of 6-12 mgKOH / g, and a solid hydroxyl value of 80 mgKOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: MR1655.

[0076] The thermosetting acrylic resin has a viscosity of 2000-6000 cps at 30℃, an acid value of less than 8 mg KOH / g, and a solid hydroxyl value (OH) of 70 mg KOH / g. Brand: Guangdong Keding Functional Materials Co., Ltd., Model: KDD®MR1636. KDD®MR1636 is a general-purpose adhesion-enhancing resin polymerized from special monomers.

[0077] Comparative Example 5

[0078] The difference between this comparative example and Example 1 is that the dispersant is a commercially available product, model AKN-2210 dispersant, from Foshan Qianyou Chemical Co., Ltd.

[0079] Comparative Example 6

[0080] The difference between this comparative example and Example 1 is that the dispersant is a commercially available product, specifically EFKA-4010, brand: BASF.

[0081] Comparative Example 7

[0082] The difference between this comparative example and Example 1 is that the dispersant is a commercially available product, namely BYK-W966, manufactured by BYK Chemical Company, Germany.

[0083] Comparative Example 8

[0084] The difference between this comparative example and Example 1 is that the dispersant is a commercially available product, namely Afcona-5065, manufactured by Efcona Polymers Inc.

[0085] Comparative Example 9

[0086] The difference between this comparative example and Example 1 is that the total mass of methacrylic acid, butyl acrylate, and pentadecylbenzene acrylate remains unchanged, and the mass ratio of methacrylic acid, butyl acrylate, and pentadecylbenzene acrylate is 6:28:7.

[0087] Performance testing

[0088] The coatings of Examples 1-2 and Comparative Examples 1-9 were subjected to performance tests, as detailed in Tables 1-2.

[0089] Table 1 Technical Specifications of the Products

[0090]

[0091] Table 2. Performance test results of the coatings in Examples 1-2 and Comparative Examples 1-9

[0092]

[0093] As shown in Table 1, the coatings of Examples 1-2 have a smooth and even appearance, high filling and sealing properties, strong adhesion to alloys, good water resistance and gloss retention, and good anti-fouling effect.

[0094] The changes in the type and ratio of acrylic resin in Comparative Examples 1-4 resulted in a decrease in the adhesion and water resistance of the coatings on the alloy, indicating that only by using specific types of acrylic resin in specific ratios can ideal adhesion be achieved on the alloy.

[0095] In Comparative Examples 5-8, the commercially available dispersants used did not provide ideal dispersion of pigments and fillers in the coating system of this invention, resulting in decreased filling, sealing, and gloss properties of the coatings. In Comparative Example 9, the mass ratio of methacrylic acid, butyl acrylate, and pentadecylbenzene acrylate in the dispersant preparation was changed, leading to decreased filling, sealing, and gloss properties of the coatings. Analysis suggests that the polymer chains were not integrated into the copolymerization reaction according to the designed ratio, ultimately causing the copolymer to lose sufficient steric stabilization capabilities.

[0096] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A moisture-proof and stain-resistant acrylic resin coating, characterized in that, It comprises 100 parts by weight of main agent and 20-25 parts by weight of curing agent; the main agent comprises the following raw materials in weight percentages: dispersant 1.5-3%, butyl acetate 10-15%, xylene 5-10%, filler 10-20%, titanium dioxide 10-20%, carbon black 1-5%, cellulose acetate butyrate 1-2%, anti-settling agent 1-1.5%, leveling agent 0.5-1%, defoamer 0.1-0.5%, and the balance being acrylic resin; The acrylic resin comprises hydroxyl acrylic resin, modified hydroxyl acrylic resin, and thermosetting acrylic resin in a mass ratio of (1.2-1.5):1:(0.4-0.7). The solid hydroxyl value of the hydroxyl acrylic resin is 25-30 mg KOH / g; the viscosity of the modified hydroxyl acrylic resin at 30°C is 2000-5000 cps, and the solid hydroxyl value is 80 mg KOH / g; the viscosity of the thermosetting acrylic resin at 30°C is 2000-6000 cps, and the solid hydroxyl value is 70 mg KOH / g. The method for preparing the dispersant includes the following steps: (1) Add pentadecylphenol, acrylic acid, catalyst, polymerization inhibitor and toluene to a four-necked flask, mix well, heat to reflux, react for 6-10 h, cool after reaction, wash, retain organic phase, remove solvent to obtain pentadecylphenyl acrylate; (2) Add methacrylic acid, butyl acrylate, pentadecyl phenyl acrylate and toluene to a reaction vessel, purge with nitrogen, heat to 75-80℃ to obtain a reaction system, dissolve the initiator and chain transfer agent in toluene, add dropwise to the reaction system, after the dropwise addition is complete, react at 75-80℃ for 4-5 hours, cool to room temperature to obtain a dispersant; The mass ratio of methacrylic acid, butyl acrylate, and pentadecylbenzene acrylate is 4:(30-31):(4-5).

2. The moisture-proof and stain-resistant acrylic resin coating according to claim 1, characterized in that, The filler is hollow microspheres.

3. The moisture-proof and stain-resistant acrylic resin coating according to claim 1, characterized in that, The curing agent is an aliphatic polyisocyanate curing agent.

4. A preparation process for a moisture-proof and stain-resistant acrylic resin coating according to any one of claims 1-3, characterized in that, Includes the following steps: (1) Mix acrylic resin, some dispersant, butyl acetate, xylene, filler, titanium dioxide, and carbon black, grind, and continue to add the remaining dispersant, cellulose acetate butyrate, anti-settling agent, leveling agent, and defoamer, mix evenly to obtain the main agent; (2) The main agent and the curing agent are packaged separately to obtain a moisture-proof and stain-proof acrylic resin coating.

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