Acid-resistant and high-temperature-resistant silicon-based epoxy elastic anticorrosive coating and preparation method thereof

Abstract

The present invention belongs to the technical field of silicon-based epoxy elastic anti-corrosion coatings, specifically acid-resistant and high-temperature resistant silicon-based epoxy elastic anti-corrosion coatings and preparation methods thereof, comprising 85-115 parts of mixed resin materials, 30-50 parts of pigments, 15-20 parts of fillers, 5-10 parts of propylene carbonate, 15-20 parts of benzyl alcohol, 5-11 parts of adipic acid dihydrazide, 0.2-0.5 parts of modified acrylate leveling agents, 1.5-2 parts of hydroxypropyl methylcellulose and 20-30 parts of water. The present invention improves the raw materials of acid-resistant and high-temperature resistant silicon-based epoxy elastic anti-corrosion coatings, and is based on mixing silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder and silicon carbide-clay bonding powder into a mixed resin material. The mixed resin material helps to improve the adhesion of the coating, and still maintains high elasticity under the action of silicone resin and silicon carbide epoxy resin, meeting the characteristics of the coating following the thermal expansion and contraction of the substrate, so that the coating is not easy to fall off after coating.

Description

Technical Field

[0001] The present invention belongs to the technical field of silicon-based epoxy elastic anti-corrosion coatings, in particular to an acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating and a preparation method thereof. Background Art

[0002] In the construction industry, corrosion has always been a key factor affecting the safety and durability of steel structures. Steel structures are susceptible to corrosion in atmospheric environments, which can reduce their load-bearing capacity, shorten their service life, and even lead to serious safety accidents. Applying anti-corrosion coatings to steel structures is an effective anti-corrosion measure. The coating acts as an insulating layer, preventing the surface of the building steel structure from direct contact with the outside world (rain, air, etc.), thereby effectively protecting the building steel structure.

[0003] Since building steel structures are generally used outdoors, the high temperature in summer can cause the surface temperature of the building steel structures to reach above 50°C. The anti-corrosion coating on the surface is inconsistent with the thermal expansion coefficient of the steel structure itself, which will cause the anti-corrosion coating layer to slip against the surface of the steel structure. Long-term alternation of hot and cold will cause the anti-corrosion coating to fall off easily. Summary of the Invention

[0004] The purpose of the present invention is to provide an acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] Acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating, comprising, by weight:

[0007] 85-115 parts of mixed resin material, 30-50 parts of pigment, 15-20 parts of filler, 5-10 parts of propylene carbonate, 15-20 parts of benzyl alcohol, 5-11 parts of adipic acid dihydrazide, 0.2-0.5 parts of modified acrylate leveling agent, 1.5-2 parts of hydroxypropyl methylcellulose, and 20-30 parts of water.

[0008] The mixed resin material comprises: silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder, wherein the mass percentage of titanium hydride powder in the mixed resin material is 3% to 7%, preferably 4-4.6% by mass, and the mass percentage of the silicon carbide-clay dense powder in the mixed resin material is 3% to 6%, preferably 4.2-4.8% by mass.

[0009] The silicon carbide-clay dense powder is a nanometer-sized powder (1-100 nanometers), and preferably a silicon carbide-clay dense powder of 60-90 nanometers is used.

[0010] Among the raw materials of acid-resistant and high-temperature resistant silicon-based epoxy elastic anti-corrosion coatings, mixed resin materials are used as the main film-forming substances, which include silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder. Silicone resin and silicon carbide epoxy resin have good stability, weather resistance and oxidation resistance in high temperature environments. Titanium hydride powder and silicon carbide-clay dense powder have good stability. Moreover, titanium hydride powder can form a suspension with silicone resin and silicon carbide epoxy resin during the mixing process. The suspension can make the coating have high adhesion in subsequent use, and the coating as a whole still maintains high elasticity under the action of silicone resin and silicon carbide epoxy resin, meeting the characteristics of the coating following the thermal expansion and contraction of the substrate, which is reflected in the coating performance that it is not easy to fall off. Due to the high viscosity of the silicone resin, the titanium hydride powder may agglomerate during the mixing process, affecting the formation and stability of the suspension. Dimethyl carbonate solvent is used to adjust the fluidity of the titanium hydride powder during the mixing process of the silicone resin and silicon carbide epoxy resin to improve the overall performance of the mixed resin material. Considering the risk factors of titanium hydride powder during fire, the mass percentage of titanium hydride powder in the mixed resin material is controlled to 3% to 7%, preferably 4-4.6%. Silicon carbide-clay bonding powder is used to enhance the density of the suspension after film formation. Generally, the silicon carbide-clay bonding powder is a nano-scale powder (1-100 nanometers) to ensure the fluidity of the silicon carbide-clay bonding powder in the silicone resin and silicon carbide epoxy resin materials.

[0011] In the raw materials of acid-resistant and high-temperature resistant silicone-based epoxy elastic anti-corrosion coatings, adipic acid dihydrazide acts as a curing agent, and its long-term contact with oxygen, high temperature and other environments achieves the purpose of curing. Modified acrylic ester leveling agent is used to increase the uniformity of coating application. Hydroxypropyl methylcellulose is used to improve the internal properties of the material, so that the mixed resin materials, pigments, fillers, etc. have obvious integrity, avoiding the coating from cracking during use. Propylene carbonate and benzyl alcohol help improve the chemical resistance of the coating and enhance the coating's resistance to acids, alkalis and other chemicals, making it suitable for anti-corrosion coatings in harsh environments. It can also improve film-forming properties, help form a uniform and smooth coating, reduce coating defects and cracking, improve the coating's adhesion and mechanical strength, and can also adjust the drying speed.

[0012] Optionally, the mass ratio of the silicone resin to the silicon carbide epoxy resin in the mixed resin material is 1:0.9-1.1. The silicone resin and the silicon carbide epoxy resin can be mixed in a mass ratio of 1:1. The fluidity of the silicon carbide epoxy resin at room temperature is 3000-4600 mPa·s.

[0013] Optionally, the pigment is any one of iron oxide, titanium dioxide, phthalocyanine blue, and azo.

[0014] Optionally, the filler is any one of calcium carbonate, talc, barium sulfate, kaolin, wollastonite powder, mica powder, bentonite, aluminum hydroxide, and magnesium hydroxide.

[0015] The preparation method of the acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating comprises the following steps:

[0016] S1. Preparation of mixed resin material

[0017] S101, weighing equal amounts of organosilicon resin and silicon carbide epoxy resin, adding them to a reactor and mixing and stirring them, controlling the reactor temperature at 140-160° C., stirring at a speed of 100-300 rpm, and stirring for 10-25 min to obtain an intermediate product;

[0018] S102, preliminarily mixing dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder into a paste or paste, wherein the mass ratio of dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder is 1:1:1;

[0019] S103, the reactor is cooled to room temperature, and the paste or paste obtained in S102 is added to the reactor and stirred with the intermediate product at a stirring speed of 100 to 300 rpm;

[0020] S2. Preparation of coating

[0021] Resin material, pigment, filler, propylene carbonate, benzyl alcohol, adipic acid dihydrazide, modified acrylate leveling agent, hydroxypropyl methylcellulose and water are mixed in a reaction kettle according to proportion to obtain a silicon-based epoxy elastic anti-corrosion coating.

[0022] Optionally, the method for preparing the silicon carbide-clay dense powder comprises the following steps:

[0023] Silicon carbide powder and clay powder are mixed in a mass ratio of (60-80): (20-40), wherein the average particle size of the silicon carbide powder is 0.5-10 μm; the average particle size of the clay powder is 1-5 μm;

[0024] adding an organic binder and water to the mixed powder, and mixing them evenly to form a green body;

[0025] The green body is placed in a sintering furnace and sintered under a protective atmosphere at a sintering temperature of 1350°C to 1700°C, a heating rate of 1 to 5°C / min, and a holding time of 0.5 to 3 hours;

[0026] The sintered product is taken out and crushed to obtain nano-scale powder.

[0027] Optionally, the protective atmosphere is nitrogen, argon or a mixture thereof, and the gas flow rate is 10 to 50 L / min.

[0028] Optionally, the organic binder is any one of epoxy resin, carboxymethyl cellulose, and polyacrylamide.

[0029] Optionally, the mass of the paste or cream is 8% to 12% of the intermediate product.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention improves the raw materials of acid-resistant and high-temperature resistant silicon-based epoxy elastic anti-corrosion coating, and prepares a mixed resin material based on a mixture of organic silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder, and silicon carbide-clay bonding powder. The mixed resin material helps to improve the adhesion of the coating, and still maintains high elasticity under the action of the organic silicone resin and silicon carbide epoxy resin, meeting the characteristics of the coating expanding and contracting with the substrate, and is manifested in the coating performance as not easy to fall off; the selected raw materials organic silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder, and silicon carbide-clay bonding powder all have good stability, weather resistance and oxidation resistance in high-temperature environments, and the prepared coating has high-temperature resistance and acid resistance; the weather resistance of the organic silicone resin, the wear resistance of the silicon carbide epoxy resin, and the mixture of titanium hydride powder and silicon carbide-clay bonding powder make the coating have good comprehensive performance and be suitable for a variety of environments. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Example 1

[0034] The acid-resistant and high-temperature resistant silicone-based epoxy elastic anti-corrosion coating comprises, by weight: 85-115 parts of mixed resin material, 30-50 parts of pigment, 15-20 parts of filler, 5-10 parts of propylene carbonate, 15-20 parts of benzyl alcohol, 5-11 parts of adipic acid dihydrazide, 0.2-0.5 parts of modified acrylic ester leveling agent, 1.5-2 parts of hydroxypropyl methylcellulose, and 20-30 parts of water.

[0035] Preferably, it comprises, by weight: 95 parts of mixed resin material, 37 parts of pigment, 17 parts of filler, 8 parts of propylene carbonate, 17 parts of benzyl alcohol, 9 parts of adipic acid dihydrazide, 0.4 parts of modified acrylate leveling agent, 1.8 parts of hydroxypropyl methylcellulose, and 23 parts of water.

[0036] The mixed resin material includes: silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder, wherein the mass percentage of titanium hydride powder in the mixed resin material is 3% to 7%, and the mass percentage of the silicon carbide-clay dense powder in the mixed resin material is 3% to 6%.

[0037] The silicon carbide-clay dense powder is a nano-scale powder. The preparation method of the silicon carbide-clay dense powder includes the following steps:

[0038] Silicon carbide powder and clay powder are mixed in a mass ratio of (60-80): (20-40), wherein the average particle size of the silicon carbide powder is 0.5-10 μm; the average particle size of the clay powder is 1-5 μm;

[0039] Adding epoxy resin organic binder and water to the mixed powder, mixing evenly to form a green body;

[0040] The green body is placed in a sintering furnace and sintered under a protective atmosphere of nitrogen, with a gas flow rate of 10 to 50 L / min, a sintering temperature of 1350°C to 1700°C, a heating rate of 1 to 5°C / min, and a holding time of 0.5 to 3 hours.

[0041] The sintered product is taken out and crushed to obtain nano-scale powder.

[0042] The mass ratio of the organic silicon resin to the silicon carbide epoxy resin in the mixed resin material is 1:1, and the fluidity of the silicon carbide epoxy resin at room temperature is 3000-4600 mPa·s.

[0043] The pigment is any one of iron oxide, titanium dioxide, phthalocyanine blue, and azo.

[0044] The filler is any one of calcium carbonate, talc, barium sulfate, kaolin, wollastonite powder, mica powder, bentonite, aluminum hydroxide, and magnesium hydroxide.

[0045] Example 2

[0046] The preparation method of silicon carbide-clay dense powder comprises the following steps:

[0047] Silicon carbide powder and clay powder are mixed in a mass ratio of 67:24, wherein the average particle size of the silicon carbide powder is 0.5-10 μm; the average particle size of the clay powder is 1-5 μm; an epoxy resin organic binder and water are added to the mixed powder, and the epoxy resin organic binder and water are mixed in a mass ratio of 1:3, and the amount added is sufficient to ensure uniform mixing and easy molding, and a green body is formed after uniform mixing; the green body is then placed in a sintering furnace and sintered under a protective atmosphere of nitrogen, with a gas flow rate of 30 L / min, a sintering temperature of 1450°C, a heating rate of 4°C / min, and a holding time of 2.2 h; the sintered product is taken out and pulverized, and the particle size of the pulverized product is nano-scale powder.

[0048] Example 3

[0049] The silicon carbide-clay dense powder prepared in Example 2 was used to prepare a silicon-based epoxy elastic anti-corrosion coating.

[0050] Equal masses of silicone resin and silicon carbide epoxy resin were weighed and added to a reactor for mixing and stirring. The reactor temperature was controlled at 180° C. and stirring was carried out at 220 rpm for 18 minutes to obtain an intermediate product. Dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder were preliminarily mixed into a paste or paste. The ratio of dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder was 1:1:1. The reactor was cooled to room temperature. The obtained paste or paste was added to the reactor and stirred and mixed with the intermediate product at 220 rpm. The mass of the paste or paste accounted for 10% of the intermediate product.

[0051] A silicone-based epoxy elastic anti-corrosion coating was obtained by mixing 95 parts of a mixed resin material, 37 parts of a pigment, 17 parts of a filler, 8 parts of propylene carbonate, 17 parts of benzyl alcohol, 9 parts of adipic acid dihydrazide, 0.4 parts of a modified acrylic leveling agent, 1.8 parts of hydroxypropyl methylcellulose and 23 parts of water in a reactor in a ratio of parts by weight.

[0052] Example 4

[0053] Equal masses of silicone resin and silicon carbide epoxy resin were weighed and added to a reactor for mixing and stirring. The reactor temperature was controlled at 180° C. and stirring was performed at 220 rpm for 18 minutes to obtain an intermediate product. Dimethyl carbonate, titanium hydride powder, and silicon carbide powder were preliminarily mixed into a paste or paste, with the ratio of dimethyl carbonate, titanium hydride powder, and silicon carbide powder being 1:1:1. The reactor was cooled to room temperature, and the obtained paste or paste was added to the reactor and stirred and mixed with the intermediate product at 220 rpm. The mass of the paste or paste accounted for 9% of the intermediate product.

[0054] A silicone-based epoxy elastic anti-corrosion coating was obtained by mixing 95 parts of a mixed resin material, 37 parts of a pigment, 17 parts of a filler, 8 parts of propylene carbonate, 17 parts of benzyl alcohol, 9 parts of adipic acid dihydrazide, 0.4 parts of a modified acrylic leveling agent, 1.8 parts of hydroxypropyl methylcellulose and 23 parts of water in a reactor in a ratio of parts by weight.

[0055] Example 5

[0056] Equal masses of silicone resin and silicon carbide epoxy resin were weighed and added to a reactor for mixing and stirring. The reactor temperature was controlled at 180° C. and stirring was carried out at 220 rpm for 18 minutes to obtain an intermediate product. Dimethyl carbonate, titanium hydride powder, and clay powder were preliminarily mixed into a paste or paste in a ratio of 1:1:1. The reactor was cooled to room temperature. The obtained paste or paste was added to the reactor and stirred at 220 rpm with the intermediate product. The mass of the paste or paste accounted for 11% of the intermediate product.

[0057] A silicone-based epoxy elastic anti-corrosion coating was obtained by mixing 95 parts of a mixed resin material, 37 parts of a pigment, 17 parts of a filler, 8 parts of propylene carbonate, 17 parts of benzyl alcohol, 9 parts of adipic acid dihydrazide, 0.4 parts of a modified acrylic leveling agent, 1.8 parts of hydroxypropyl methylcellulose and 23 parts of water in a reactor in a ratio of parts by weight.

[0058] Example 6

[0059] The silicon carbide-clay dense powder prepared in Example 2 was used to prepare a silicon-based epoxy elastic anti-corrosion coating.

[0060] Equal masses of silicone resin and silicon carbide epoxy resin were weighed and added to a reactor for mixing and stirring. The reactor temperature was controlled at 180° C. and stirring was carried out at 220 rpm for 18 minutes to obtain an intermediate product. Dimethyl carbonate and silicon carbide-clay dense powder were preliminarily mixed into a paste or paste, and the ratio of dimethyl carbonate to silicon carbide-clay dense powder was 1:1. The reactor was cooled to room temperature, and the paste or paste was added to the reactor and stirred with the intermediate product at 220 rpm. The mass of the paste or paste accounted for 10% of the intermediate product.

[0061] A silicone-based epoxy elastic anti-corrosion coating was obtained by mixing 95 parts of a mixed resin material, 37 parts of a pigment, 17 parts of a filler, 8 parts of propylene carbonate, 17 parts of benzyl alcohol, 9 parts of adipic acid dihydrazide, 0.4 parts of a modified acrylic leveling agent, 1.8 parts of hydroxypropyl methylcellulose and 23 parts of water in a reactor in a ratio of parts by weight.

[0062] Example 7

[0063] Equal masses of silicone resin and silicon carbide epoxy resin are weighed and added to a reactor for mixing and stirring. The reactor temperature is controlled at 180° C. and stirring is performed at 220 rpm for 18 minutes to obtain an intermediate product. Dimethyl carbonate and titanium hydride powder are preliminarily mixed to form a paste or paste, with the ratio of dimethyl carbonate to titanium hydride powder being 1:1. The reactor is cooled to room temperature, and the paste or paste is added to the reactor and stirred with the intermediate product at 220 rpm. The mass of the paste or paste is 10% of the intermediate product.

[0064] A silicone-based epoxy elastic anti-corrosion coating was obtained by mixing 95 parts of a mixed resin material, 37 parts of a pigment, 17 parts of a filler, 8 parts of propylene carbonate, 17 parts of benzyl alcohol, 9 parts of adipic acid dihydrazide, 0.4 parts of a modified acrylic leveling agent, 1.8 parts of hydroxypropyl methylcellulose and 23 parts of water in a reactor in a ratio of parts by weight.

[0065] Performance test experiment:

[0066] The acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coatings obtained in Examples 3 to 7 were applied to a Q235 steel substrate that had been surface-polished in the same manner. The coating thickness was 85±5 μm. After naturally drying and curing for 2 to 3 days, the obtained test materials were tested for acid resistance, high-temperature resistance, and adhesion. The results are shown in Table 1:

[0067] Acid resistance test: Place the test material in a 3% hydrochloric acid solution, soak for 24 hours, then take it out for testing.

[0068] High temperature resistance test: Place the test material in a high temperature oven and set different temperature conditions at 80℃, 120℃, and 200℃, and treat it at each temperature for 2 hours.

[0069] Adhesion test: Place the test material in a high-temperature oven and heat it to 80°C, then cool it to -5°C. Repeat this process for more than 10 times, and then rinse it with a 3MPa high-pressure water gun for 5 minutes.

[0070] Table 1

[0071]

[0072] From the data comparison in Table 1, it can be seen that titanium hydride powder can improve the density of the mixed resin material, and exhibit good acid resistance during the acid resistance test, thereby preventing acidic substances from destroying the coating in a short time and causing corrosion to the metal plate. However, the high temperature resistance of titanium hydride powder is poor, and its high temperature resistance can be improved by adding a powder material containing clay powder. After repeated high and low temperature treatment, the acid-resistant and high-temperature resistant silicon-based epoxy elastic anti-corrosion coating containing titanium hydride powder and clay powder has insufficient elasticity, and the bonding part between the anti-corrosion coating and the steel structure is very dense. There is a difference in the thermal expansion coefficient of the anti-corrosion coating and the steel structure itself. During the repeated heating-cooling process, the problem of bonding failure occurs, and flaking and point-like falling off are prone to occur. The silicon carbide-clay dense powder prepared by sintering and pulverizing in Example 2 exhibits high adhesion test performance consistent with the titanium hydride powder particles. As can be seen from Table 1, the acid-resistant and high-temperature resistant silicon-based epoxy elastic anti-corrosion coating prepared in Example 3 has the best comprehensive performance.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating, characterized in that: Contains by weight: Mix 85-115 parts of resin material, 30-50 parts of pigment, 15-20 parts of filler, 5-10 parts of propylene carbonate, 15-20 parts of benzyl alcohol, 5-11 parts of adipic acid dihydrazide, 0.2-0.5 parts of modified acrylate leveling agent, 1.5-2 parts of hydroxypropyl methylcellulose and 20-30 parts of water; The mixed resin material comprises: silicone resin, silicon carbide epoxy resin, dimethyl carbonate, titanium hydride powder and silicon carbide-clay dense powder, wherein the mass percentage of titanium hydride powder in the mixed resin material is 3% to 7%, and the mass percentage of the silicon carbide-clay dense powder in the mixed resin material is 3% to 6%; The silicon carbide-clay dense powder is a nanometer-scale powder; The preparation method of the silicon carbide-clay dense powder comprises the following steps: Silicon carbide powder and clay powder are mixed in a mass ratio of (60-80): (20-40), wherein the average particle size of the silicon carbide powder is 0.5-10 μm; the average particle size of the clay powder is 1-5 μm; adding an organic binder and water to the mixed powder, and mixing them evenly to form a green body; The green body is placed in a sintering furnace and sintered under a protective atmosphere at a sintering temperature of 1350°C to 1700°C, a heating rate of 1 to 5°C / min, and a holding time of 0.5 to 3 hours; The sintered product is taken out and crushed to obtain nano-scale powder.

2. The acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating according to claim 1, characterized in that: The mass ratio of the organic silicon resin to the silicon carbide epoxy resin in the mixed resin material is 1:0.9-1.1, and the fluidity of the silicon carbide epoxy resin at room temperature is 3000-4600 mPa·s.

3. The acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating according to claim 1, characterized in that: The pigment is any one of iron oxide, titanium dioxide, phthalocyanine blue and azo.

4. The acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating according to claim 1, characterized in that: The filler is any one of calcium carbonate, talc, barium sulfate, kaolin, wollastonite powder, mica powder, bentonite, aluminum hydroxide, and magnesium hydroxide.

5. The method for preparing the acid-resistant and high-temperature-resistant silicon-based epoxy elastic anticorrosive coating according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Preparation of mixed resin material S101, weighing equal amounts of organosilicon resin and silicon carbide epoxy resin, adding them to a reactor and mixing and stirring them, controlling the reactor temperature at 140-160° C., stirring at a speed of 100-300 rpm, and stirring for 10-25 min to obtain an intermediate product; S102, preliminarily mixing dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder into a paste or paste, wherein the mass ratio of dimethyl carbonate, titanium hydride powder, and silicon carbide-clay dense powder is 1:1:1; S103, the reactor is cooled to room temperature, and the paste or paste obtained in S102 is added to the reactor and stirred with the intermediate product at a stirring speed of 100 to 300 rpm; S2. Preparation of coating The mixed resin material, pigment, filler, propylene carbonate, benzyl alcohol, adipic acid dihydrazide, modified acrylic ester leveling agent, hydroxypropyl methylcellulose and water are mixed in a reaction kettle according to proportion to obtain an acid-resistant and high-temperature-resistant silicon-based epoxy elastic anti-corrosion coating.

6. The method for preparing the acid-resistant and high-temperature-resistant silicon-based epoxy elastic anticorrosive coating according to claim 5, characterized in that: The protective atmosphere is nitrogen, argon or a mixture thereof, and the gas flow rate is 10 to 50 L / min.

7. The method for preparing the acid-resistant and high-temperature-resistant silicon-based epoxy elastic anticorrosive coating according to claim 5, characterized in that: The organic binder is any one of epoxy resin, carboxymethyl cellulose and polyacrylamide.

8. The method for preparing the acid-resistant and high-temperature-resistant silicon-based epoxy elastic anticorrosive coating according to claim 5, characterized in that: The mass of the paste or ointment is 8% to 12% of the intermediate product.

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