Wear-resistant anti-falling acid-resistant paint and preparation method thereof

Abstract

The application discloses a wear-resistant, anti-falling and acid-resistant paint and a preparation method thereof, and relates to the technical field of paints. In the application, dopamine is modified by methacryloyl chloride to promote the base to maintain an intact structure in an acidic environment, and the polar groups in the dopamine form Van der Waals force with the surface of the base material, so that the effects of wear resistance, anti-falling and acid resistance are achieved. In addition, m-xylylene diisocyanate is used as a hard segment, D-iditol and 3-aminopropyl pentamethyl disiloxane are used as soft segments, and a network cross-linking structure high polymer is prepared, so that the base is endowed with strong cohesive force, and the wear resistance and anti-falling performance are enhanced. In addition, the phenolic hydroxyl groups in the dopamine and the amino groups in the 3-aminopropyl pentamethyl disiloxane are oxidized and self-polymerized under weak alkaline conditions, so that the base can be attached to almost all substrates. Then, by increasing the content of isocyanate groups in the base, the molecular chain segments are closely packed, so that solvent molecules are difficult to penetrate, and the acid resistance effect is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular to a wear-resistant and acid-resistant paint and a preparation method thereof. BACKGROUND

[0002] For a long time, paint is widely used in various fields of the national economy as a simple, convenient, economical and effective means of corrosion and stain prevention, which is not restricted by the area and shape of the equipment, and has a certain decorative effect. However, with the rapid development of China's economy, factories fueled by resources such as coal and oil are scattered everywhere. With the development of science and technology, numerous power plants have been built, and the amount of coal burned has increased rapidly. Sulfur, an impurity in coal, emits acidic gases such as sulfur dioxide and nitrogen compounds into the atmosphere during combustion, which become sulfuric acid ions and nitric acid ions. When it rains, the suspended acid ions in the atmosphere will be carried by the rain and fall and adhere to the surface of various objects, causing the paint surface to age and fall off, thereby corroding objects exposed to the outdoors for a long time. Therefore, the performance requirements of paint in many industries are constantly improving, and people have increasingly high requirements for the environmental resistance and service life of paint. Conventional and single-function paints cannot meet the needs of society.

[0003] Nowadays, the research and development of high-performance composite paint with multiple functions have become an urgent need for social and economic development. Increasing the development of wear-resistant and anti-falling paint has a wide and profound significance for extending the service life of materials, increasing reliability, improving efficiency, saving energy and material competitiveness. Therefore, it is particularly necessary to invent a wear-resistant and acid-resistant paint. SUMMARY

[0004] The purpose of the present application is to provide a wear-resistant and acid-resistant paint and a preparation method thereof to solve the problems in the prior art.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a wear-resistant and acid-resistant paint, which is prepared by mixing modified dopamine, polyurethane, naphthenic acid soap, zinc stearate and sodium bisulfite.

[0006] Further, the modified dopamine is prepared from methyl acryloyl chloride modified dopamine.

[0007] Further, the polyurethane is synthesized using m-xylylene diisocyanate as a hard segment, D-iditol and 3-aminopropyl pentamethyl disiloxane as a soft segment.

[0008] Further, a preparation method of a wear-resistant and acid-resistant paint comprises the following preparation steps:

[0009] (1) mixing dopamine, methanol, triethylamine, cooling to 0-4℃, adding 20wt% methacryloyl chloride-tetrahydrofuran solution, warming to room temperature, stirring at 80-150rpm for 50-80min, adding ethyl acetate, stirring at 80-150rpm for 10-20min, filtering, taking the solid, drying with anhydrous sodium sulfate for 15-60min, obtaining modified dopamine;

[0010] (2) pretreating D-iditol, 3-aminopropyl pentamethyldisiloxane, adding m-xylylene diisocyanate under nitrogen atmosphere at 50-70℃, warming to 60-80℃, reacting for 1-2h, adding 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, stirring at 50-70℃ and 120-200rpm for 30-70min, adding modified dopamine, adding sodium hydroxide to adjust the solution pH to 7.5-8.5, adding methylene diisocyanate, stirring at 280-400rpm for 2.5-5h, then distilling under reduced pressure, adding naphthenic acid soap, zinc stearate, sodium bisulfite, stirring at 100-200rpm for 30-60min, obtaining wear-resistant, anti-shedding, acid-resistant paint.

[0011] Further, the rate of adding 20wt% methacryloyl chloride-tetrahydrofuran solution in step (1) is 1-5mL / s.

[0012] Further, the mass ratio of dopamine, methanol, triethylamine, 20wt% methacryloyl chloride-tetrahydrofuran solution, ethyl acetate in step (1) is 0.5-2.8:100:0.6-1.3:12-20:120.

[0013] Further, the pretreatment step in step (2) is dehydrating at 100℃ for 1.5-3h.

[0014] Further, the pressure of distilling under reduced pressure in step (2) is 100-500Pa, and the time is 3-8h.

[0015] Further, the mass ratio of D-iditol, 3-aminopropyl pentamethyldisiloxane, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, modified dopamine, methylene diisocyanate, naphthenic acid soap, zinc stearate, sodium bisulfite in step (2) is 5-15:1-5:25-35:7:2:1:3-7:1-5:0.5:1:0.2.

[0016] Further, the wear-resistant, anti-shedding, acid-resistant paint and deionized water are mixed at a mass ratio of 5:2 before being used for painting.

[0017] Compared with the prior art, the present application has the advantages of:

[0018] The coating of the present application is prepared by mixing modified dopamine and polyurethane, so as to achieve the effects of wear resistance, acid resistance and anti-falling.

[0019] Firstly, the amide bond formed by the reaction of the acyl chloride group of methacryloyl chloride and the amino group of dopamine can form stable hydrogen bonds with hydrogen ions, so that the methacryloyl dopamine can maintain the integrity of the structure in an acidic environment, the polar groups on the bond can form van der Waals force with the surface of the substrate, thereby enhancing the adhesion, achieving the effects of wear resistance, anti-falling and acid resistance, and when mixed with synthetic polyurethane, the unreacted hydroxyl groups can react to form ether bonds, the oxygen atoms in the ether bonds can stabilize the charge, have certain resistance to acid, and can form hydrogen bonds with many inorganic substrates, thereby providing good adhesion and enhancing the wear resistance, anti-falling and acid resistance.

[0020] Secondly, the polyurethane is synthesized by using m-xylylene diisocyanate as a hard segment, D-iditol and 3-aminopropyl pentamethyl disiloxane as soft segments, the isoplanar hydroxyl groups of D-iditol are gradually bonded with isocyanate groups to form a network cross-linked structure of high polymer, the dense cross-linking points can disperse stress, the three-dimensional structure is more stable in space, and the cross-linking chemical bonds are bound, so that the matrix has strong cohesive force and is less likely to fall off from the surface of the adherend when subjected to external force, thereby enhancing the wear resistance and anti-falling performance, and the phenolic hydroxyl groups in dopamine and the amino groups in 3-aminopropyl pentamethyl disiloxane are oxidized to self-polymerize under weak alkaline conditions, so that the matrix can be attached to almost all substrates through chelation, hydrogen bonding, hydrophobic interaction and electrostatic interaction, then, by adding methylene diisocyanate, the content of isocyanate groups in the matrix is increased, the molecular chain segments are arranged relatively regularly and closely packed, so that solvent molecules are difficult to penetrate into the matrix, thereby enhancing the acid resistance effect, under the assistance of water medium, the hydrophilic ionic groups are distributed on the surface of the matrix, the particles gradually accumulate when the film is formed, when the water interface disappears and the polymer-air interface is formed, the hydrophilic ionic groups are pulled back into the matrix by the polymer molecular chain, so that the low surface energy segments in 3-aminopropyl pentamethyl disiloxane migrate to the surface of the coating, thereby improving the acid resistance of the coating. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] In order to more clearly illustrate the method provided by the present application, the following examples are provided for detailed description, and the test methods of various indexes of the wear-resistant and anti-falling acid-resistant coating prepared in the following examples are as follows:

[0023] The wear-resistant and anti-falling acid-resistant coating and deionized water were mixed at a mass ratio of 5:2, coated on an iron plate, and naturally air-dried to a thickness of 0.3 mm.

[0024] Wear resistance: the same size of the examples and the comparative examples were taken, and a UMT-2Nano+MicroTribometer friction tester was used under the conditions of a load of 10 N, a rotation speed of 569 r / min, and a mileage of 1000 m to test the wear rate of the coating of the sample plate.

[0025] Anti-falling: the same size of the examples and the comparative examples were taken, and the adhesion test was performed according to GB / T5210.

[0026] Acid resistance: the same size of the examples and the comparative examples were taken, and the acid resistance test was performed by immersing the sample plate in a 30wt% sulfuric acid solution for 7 days, and observing the changes.

[0027] Example 1

[0028] (1) Dopamine, methanol, and triethylamine were mixed, and the temperature was lowered to 0°C. A 20wt% methacryloyl chloride-tetrahydrofuran solution was added at a rate of 1 mL / s, the temperature was raised to room temperature, and stirring was performed at 80 rpm for 50 min. Ethyl acetate was added, stirring was performed at 80 rpm for 10 min, filtration was performed, the solid was taken, and anhydrous sodium sulfate was used for drying for 15 min to obtain modified dopamine; the mass ratio of the dopamine, methanol, triethylamine, 20wt% methacryloyl chloride-tetrahydrofuran solution, and ethyl acetate was 0.5:100:0.6:12:120;

[0029] (2) D-Iditol, 3-aminopropyl pentamethyldisiloxane are heated to 100℃, dehydrated for 1.5h, under the atmosphere of nitrogen at 50℃, m-xylylene diisocyanate is added, heated to 60℃, reacted for 1h, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate are added, stirred at 50℃, 120rpm for 30min, modified dopamine is added, and sodium hydroxide is added to adjust the pH of the solution to 7.5, methylene diisocyanate is added, stirred at 280rpm for 2.5h, then distilled under the condition of 100Pa pressure for 3h, naphthenic acid soap, zinc stearate, sodium bisulfite are added, stirred at 100rpm for 30min, to obtain a wear-resistant, anti-falling, acid-resistant coating; the mass ratio of D-Iditol, 3-aminopropyl pentamethyldisiloxane, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, modified dopamine, methylene diisocyanate, naphthenic acid soap, zinc stearate, sodium bisulfite is 5:1:25:7:2:1:3:1:0.5:1:0.2;

[0030] Example 2

[0031] (1) Dopamine, methanol, triethylamine are mixed, cooled to 2℃, 20wt% methacryloyl chloride-tetrahydrofuran solution is added at 3mL / s, heated to room temperature, stirred at 120rpm for 60min, ethyl acetate is added, stirred at 100rpm for 15min, filtered, the solid is taken, dried with anhydrous sodium sulfate for 35min, to obtain modified dopamine; the mass ratio of dopamine, methanol, triethylamine, 20wt% methacryloyl chloride-tetrahydrofuran solution, ethyl acetate is 1.3:100:0.9:16:120;

[0032] (2) D-Iditol, 3-aminopropylpentamethyldisiloxane were heated to 100℃, dehydrated for 2h, under the atmosphere of nitrogen at 60℃, m-xylylene diisocyanate was added, heated to 70℃, reacted for 1.5h, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate were added, stirred at 60℃, 160rpm for 50min, modified dopamine was added, and sodium hydroxide was added to adjust the pH of the solution to 7.9, methylene diisocyanate was added, stirred at 340rpm for 3h, then distilled under the condition of 300Pa for 6h, naphthenic acid soap, zinc stearate, sodium bisulfite were added, stirred at 150rpm for 45min, to obtain the wear-resistant, anti-falling and acid-resistant coating; the mass ratio of D-Iditol, 3-aminopropylpentamethyldisiloxane, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, modified dopamine, methylene diisocyanate, naphthenic acid soap, zinc stearate, sodium bisulfite was 10:3:30:7:2:1:5:4:0.5:1:0.2.

[0033] Example 3

[0034] (1) Dopamine, methanol, triethylamine were mixed, cooled to 4℃, 20wt% methacryloyl chloride-tetrahydrofuran solution was added at 5mL / s, warmed to room temperature, stirred at 150rpm for 80min, ethyl acetate was added, stirred at 150rpm for 20min, filtered, the solid was taken, dried with anhydrous sodium sulfate for 60min, to obtain modified dopamine; the mass ratio of dopamine, methanol, triethylamine, 20wt% methacryloyl chloride-tetrahydrofuran solution, ethyl acetate was 2.8:100:1.3:20:120;

[0035] (2) D-iditol, 3-aminopropyl pentamethyldisiloxane is heated to 100℃, dehydrated for 3h, under the nitrogen atmosphere at 70℃, m-xylylene diisocyanate is added, heated to 80℃, reacted for 2h, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate are added, stirred at 70℃, 200rpm for 70min, modified dopamine is added, and sodium hydroxide is added to adjust the pH of the solution to 8.5, methylene diisocyanate is added, stirred at 400rpm for 5h, then distilled under the condition of 500Pa pressure for 8h, naphthenic acid soap, zinc stearate, sodium bisulfite are added, stirred at 200rpm for 60min, to obtain the wear-resistant, anti-falling, acid-resistant coating; the mass ratio of the D-iditol, 3-aminopropyl pentamethyldisiloxane, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, modified dopamine, methylene diisocyanate, naphthenic acid soap, zinc stearate, sodium bisulfite is 15:5:35:7:2:1:7:5:0.5:1:0.2.

[0036] Comparative Example 1

[0037] Comparative Example 1 is different from Example 2 in that there is no step (1); the rest of the steps are the same as Example 2.

[0038] Comparative Example 2

[0039] Comparative Example 2 is different from Example 2 in that there is no step (1), and step (2) is changed to: D-iditol, 3-aminopropyl pentamethyldisiloxane is heated to 100℃, dehydrated for 2h, under the nitrogen atmosphere at 60℃, m-xylylene diisocyanate is added, heated to 70℃, reacted for 1.5h, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate are added, stirred at 60℃, 160rpm for 50min, methylene diisocyanate is added, stirred at 340rpm for 3h, then distilled under the condition of 300Pa pressure for 6h, naphthenic acid soap, zinc stearate, sodium bisulfite are added, stirred at 150rpm for 45min, to obtain the wear-resistant, anti-falling, acid-resistant coating; the mass ratio of the D-iditol, 3-aminopropyl pentamethyldisiloxane, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, methylene diisocyanate, naphthenic acid soap, zinc stearate, sodium bisulfite is 10:3:30:7:2:1:4:0.5:1:0.2; the rest of the steps are the same as Example 2.

[0040] Comparative Example 3

[0041] The difference between Comparative Example 3 and Example 2 is that step (2) is different, and step (2) is changed to: D-iditol is heated to 100℃, dehydrated for 2h, under the atmosphere of nitrogen at 60℃, m-xylylene diisocyanate is added, heated to 70℃, reacted for 1.5h, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate are added, stirred at 160rpm for 50min at 60℃, modified dopamine is added, and sodium hydroxide is added to adjust the pH of the solution to 7.9, methylene diisocyanate is added, stirred at 340rpm for 3h, then distilled under the condition of 300Pa pressure for 6h, naphthenic acid soap, zinc stearate, sodium bisulfite are added, stirred at 150rpm for 45min, to obtain the wear-resistant, anti-falling and acid-resistant coating; the mass ratio of D-iditol, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, modified dopamine, methylene diisocyanate, naphthenic acid soap, zinc stearate, sodium bisulfite is 10:30:7:2:1:5:4:0.5:1:0.2; the rest of the steps are the same as Example 2.

[0042] Comparative Example 4

[0043] The difference between Comparative Example 4 and Example 2 is that step (2) is different, and step (2) is changed to: D-iditol, 3-aminopropyl pentamethyldisiloxane are heated to 100℃, dehydrated for 2h, under the atmosphere of nitrogen at 60℃, m-xylylene diisocyanate is added, heated to 70℃, reacted for 1.5h, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate are added, stirred at 160rpm for 50min at 60℃, modified dopamine is added, and sodium hydroxide is added to adjust the pH of the solution to 7.9, stirred at 340rpm for 3h, then distilled under the condition of 300Pa pressure for 6h, naphthenic acid soap, zinc stearate, sodium bisulfite are added, stirred at 150rpm for 45min, to obtain the wear-resistant, anti-falling and acid-resistant coating; the mass ratio of D-iditol, 3-aminopropyl pentamethyldisiloxane, m-xylylene diisocyanate, 4,4'-methylenebis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyltin dilaurate, modified dopamine, naphthenic acid soap, zinc stearate, sodium bisulfite is 10:3:30:7:2:1:5:0.5:1:0.2; the rest of the steps are the same as Example 2.

[0044] Effect Example

[0045] The performance analysis results of the wear-resistant, anti-falling and acid-resistant coating prepared by using Examples 1 to 3 and Comparative Examples 1 to 4 of the present application are shown in Table 1 below.

[0046] Table 1

[0047] Wear rate (%) Adhesion (MPa) Acid resistance Example 1 6 7.5 No change Example 2 5 7.9 No change Example 3 8 7.6 No change Comparative Example 1 10 7.3 Slight tarnish Comparative Example 2 13 6.9 Slight blistering Comparative Example 3 11 6.2 Moderate blistering Comparative Example 4 11 7.4 Moderate blistering

[0048] From the comparison of the experimental results of the examples and the comparative examples in Table 1, it can be found that the dopamine is modified by methacryloyl chloride in the present application, so that the substrate can maintain the integrity of the structure in an acidic environment, and the polar groups therein can form van der Waals force with the surface of the substrate, thereby enhancing the adhesion, achieving the effects of wear resistance, anti-falling and acid resistance, and when mixed with synthetic polyurethane, the unreacted hydroxyl groups can react to form ether bonds, thereby enhancing the wear resistance, anti-falling and acid resistance; the polyurethane is synthesized by using m-xylylene diisocyanate as a hard segment and D-iditol and 3-aminopropyl pentamethyl disiloxane as a soft segment, the isoplanar hydroxyl groups of D-iditol are gradually bonded with isocyanate groups to form a network cross-linked structure of high polymer, plus the restraint of cross-linking chemical bonds, so that the substrate has strong cohesive force and is less likely to fall off the surface of the adherend when subjected to external force, thereby enhancing the wear resistance and anti-falling performance, meanwhile, the phenolic hydroxyl groups in dopamine and the amino groups in 3-aminopropyl pentamethyl disiloxane can be oxidized to self-polymerize under weak alkaline conditions, so that the substrate can be attached to almost all substrates, then, by adding methylene diisocyanate, the molecular chain segments are arranged relatively regularly and closely packed, so that solvent molecules are difficult to penetrate into the substrate, thereby enhancing the acid resistance effect, under the assistance of water medium, the hydrophilic ionic groups are distributed on the surface of the substrate, the particles gradually accumulate when the film is formed, when the water interface disappears and the polymer-air interface is formed, the hydrophilic ionic groups will enter the interior of the substrate, so that the low surface energy segments migrate to the surface of the coating, thereby improving the acid resistance effect of the coating.

[0049] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and this application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any mark in the claims should not be considered as limiting the involved claims.

Claims

1. A wear-resistant, anti-falling, acid-resistant paint, characterized by, The wear-resistant anti-falling acid-resistant paint is prepared by mixing modified dopamine, polyurethane, naphthenic acid soap, zinc stearate and sodium bisulfite. The modified dopamine is prepared by modifying dopamine with methacryloyl chloride. The polyurethane is synthesized by using m-xylylene diisocyanate as a hard segment, D-iditol and 3-aminopropyl pentamethyl disiloxane as soft segments. The preparation method of the wear-resistant anti-falling acid-resistant paint comprises the following preparation steps: (1) Dopamine, methanol and triethylamine are mixed, and the temperature is lowered to 0-4 DEG C. 20wt% methacryloyl chloride-tetrahydrofuran solution is added, the temperature is raised to room temperature, and stirring is carried out at 80-150 rpm for 50-80 min. Ethyl acetate is added, stirring is carried out at 80-150 rpm for 10-20 min, filtration is carried out, the solid is taken out, dried with anhydrous sodium sulfate for 15-60 min, and modified dopamine is obtained. (2) D-iditol and 3-aminopropyl pentamethyl disiloxane are pretreated, and m-xylylene diisocyanate is added under nitrogen atmosphere at 50-70 DEG C. The temperature is raised to 60-80 DEG C, and reaction is carried out for 1-2 h. 4,4'-methylene bis(3-chloro-2,6-diethyl aniline), 1,4-butanediol and dibutyl tin dilaurate are added, stirring is carried out at 50-70 DEG C and 120-200 rpm for 30-70 min. Modified dopamine is added, sodium hydroxide is added to adjust the pH of the solution to 7.5-8.5, and methylene diisocyanate is added. Stirring is carried out at 280-400 rpm for 2.5-5 h, and then reduced pressure distillation is carried out. Naphthenic acid soap, zinc stearate and sodium bisulfite are added, and stirring is carried out at 100-200 rpm for 30-60 min, and the wear-resistant anti-falling acid-resistant paint is obtained.

2. The acid-resistant paint of claim 1, wherein the acid-resistant paint is an abrasion-resistant, anti-falling, acid-resistant paint. In step (1), the rate of adding 20wt% methacryloyl chloride-tetrahydrofuran solution is 1-5 mL / s.

3. The acid-resistant paint of claim 1, wherein the acid-resistant paint is an abrasion-resistant and anti-falling acid-resistant paint. In step (1), the mass ratio of dopamine, methanol, triethylamine, 20wt% methacryloyl chloride-tetrahydrofuran solution and ethyl acetate is 0.5-2.8:100:0.6-1.3:12-20:

120.

4. The acid-resistant paint of claim 1, wherein the acid-resistant paint is an abrasion-resistant and anti-falling acid-resistant paint. In step (2), the pretreatment step is carried out at 100 DEG C for 1.5-3 h.

5. The acid resistant wear-proof and anti-falling paint according to claim 1, characterized in that, In step (2), the pressure of reduced pressure distillation is 100-500 Pa, and the time is 3-8 h.

6. The acid resistant wear-proof and anti-falling paint according to claim 1, characterized in that, In step (2), the mass ratio of D-iditol, 3-aminopropyl pentamethyl disiloxane, m-xylylene diisocyanate, 4,4'-methylene bis(3-chloro-2,6-diethyl aniline), 1,4-butanediol, dibutyl tin dilaurate, modified dopamine, methylene diisocyanate, naphthenic acid soap, zinc stearate and sodium bisulfite is 5-15:1-5:25-35:7:2:1:3-7:1-5:0.5:1:0.

2.

7. The acid resistant paint of claim 1, wherein the acid resistant paint is an abrasion resistant paint that prevents falling. The wear-resistant anti-falling acid-resistant paint is mixed with deionized water at a mass ratio of 5:2, and then used for coating.