Organic sericite and application thereof in environment-friendly anticorrosive coating

Abstract

The invention relates to the technical field of anticorrosive paint, in particular to organic sericite and application thereof in an environment-friendly anticorrosive coating. According to the invention, the problem that traditional sericite is poor in compatibility with components when being applied to the environment-friendly anticorrosive coating, so that the anticorrosive effect of a cured anticorrosive coating is poor is solved. The sericite is subjected to surface organic treatment, and the surface of the sericite is treated by using aluminum triphosphate, chitosan, sodium alginate and silane; preparing water-based resin, and adding the synthesized nano-silver zeolite into the water-based resin; by adjusting the dosage of each component, the compatibility of the sericite, the water-based resin and other components is good, the water-based environment-friendly anticorrosive coating has good tolerance to acid, alkali and salt mist, and the water-based environment-friendly anticorrosive coating is suitable for outdoor building anticorrosive coatings.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-corrosion coatings, specifically to organically modified sericite and its application in environmentally friendly anti-corrosion coatings. Background Art

[0002] In the current fields of materials science and protection technology, with the development of industrial production and the advancement of infrastructure construction, the performance requirements for anti-corrosion coatings are increasing day by day. When facing complex and changeable corrosion environments, traditional anti-corrosion coatings gradually expose many deficiencies and are difficult to meet the high standards of modern industry and daily life.

[0003] Weathering, oxidation, etc. that building facilities are exposed to in the natural environment for a long time pose severe challenges to the durability, stability, and corrosion resistance of anti-corrosion coatings. Especially in the humid southern regions, mildew is likely to grow on the building surface, causing corrosion to the building. As a natural mineral material, sericite has shown great potential in the anti-corrosion field due to its unique structure and properties. Sericite is a fine-grained muscovite, presenting fine scaly shapes, with an aspect ratio ≥ 80, having good physical stability, anti-aging performance, and a relatively low cost. Its crystal can be split into extremely thin flakes, rich in elasticity, bendable, heat-resistant up to 600 °C, and resistant to acids and alkalis; moreover, the chemical composition, structure, and texture of sericite are similar to those of kaolin, with good suspension in water media and organic solvents, white color, fine particles, and viscosity. However, sericite is hydrophilic and oleophobic. Directly adding it to an organic coating will result in poor dispersibility, causing interfacial problems, and a large number of pores and cracks will form after the coating film is formed, unable to effectively enhance the coating density and shield corrosion media.

[0004] To solve the problem of poor interfacial compatibility between sericite and organic resin, various physical and chemical methods are currently often used for surface coating or surface grafting modification of fillers. However, for the chemical grafting modification process, the organic solvents used are less environmentally friendly; for the physical coating modification, the adsorption strength is weak and the improvement effect is limited. Therefore, it is crucial to develop an efficient, simple, and environmentally friendly method for organically modifying sericite so that it can be better applied to environmentally friendly anti-corrosion coatings. Applying organically modified sericite to environmentally friendly anti-corrosion coatings is expected to combine the excellent properties of sericite and environmental protection requirements to develop anti-corrosion coatings with excellent performance and environmental friendliness, meeting the urgent market demand for high-performance anti-corrosion materials.

[0005] Therefore, organically modified sericite and its application in environmentally friendly anti-corrosion coatings are proposed. Summary of the Invention

[0006] The object of the present invention is to provide organophilic sericite and its application in an environmentally friendly anti-corrosion coating. The surface of sericite is organically treated by using aluminum tripolyphosphate, chitosan, sodium alginate and silane; and an aqueous resin is prepared, and synthesized nano-silver zeolite is added to the aqueous resin; by adjusting the dosage of each component, the compatibility between sericite and components such as the aqueous resin is good, and the aqueous environmentally friendly anti-corrosion coating has good tolerance to acids, alkalis and salt spray.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The substance information used in the present invention is as follows: The sericite to be treated is a product produced by the company, specifically a product produced according to the method of the company's CN103111352B; carboxymethyl cellulose CAS: 9004-57-3; glycidyl methacrylate is purchased from Shandong Yukang Chemical Co., Ltd.; zeolite is purchased from Aus Catalytic Materials (Dalian) Co., Ltd.; talcum powder is purchased from Qingdao Kaiweier Powder Engineering Technology Co., Ltd.; nano-titanium dioxide is purchased from Xianfeng Nano Technology Co., Ltd.; polydimethylsiloxane is purchased from Jiangsu Runfeng Synthetic Technology Co., Ltd.; aluminum tripolyphosphate CAS: 29196-72-3; sodium alginate CAS: 9005-38-3; methyltrimethoxysilane CAS: 1185-55-3; methacryloxymethyltrimethoxysilane CAS: 54586-78-6; trimethoxysilylmethyl mercaptan CAS: 30817-94-8; phthalic anhydride CAS: 85-44-9; p-toluenesulfonic acid CAS: 104-15-4; methyl methacrylate CAS: 80-62-6; trifluoroethyl methacrylate CAS: 352-87-4; perfluorooctyl acrylate CAS: 307-98-2; allicin CAS: 539-86-6.

[0009] On the one hand, the present invention provides organophilic sericite, and the preparation method of the organophilic sericite is as follows:

[0010] Pure sericite is added to a dilute hydrochloric acid solution with a concentration of 5wt%, the solid-liquid ratio is controlled to be 1:5 - 1:10, and after centrifugation, it is washed and dried to obtain pretreated sericite; 85 - 110 parts of the pretreated sericite are added to deionized water to obtain a pretreated sericite dispersion; the pretreated sericite dispersion is added to an aluminum tripolyphosphate solution containing 8 - 12 parts of aluminum tripolyphosphate, and after reaction, a chitosan solution containing 4.5 - 6.0 parts of chitosan is added thereto, and then 2.0 - 3.5 parts of sodium alginate are added, and at the same time, 13 - 23 parts of a calcium chloride aqueous solution are added dropwise to obtain an organophilic sericite intermediate dispersion; the silane is hydrolyzed to obtain a silane hydrolysis solution; the organophilic sericite intermediate dispersion is added to the silane hydrolysis solution, and after reaction, it is filtered, washed with water and dried to obtain organophilic sericite;

[0011] The silane is one of methyltrimethoxysilane, methacryloxymethyltrimethoxysilane and trimethoxysilylmethanethiol.

[0012] Preferably, the preparation method of the pretreated sericite is as follows: crush the sericite to be treated to an average particle size of 800 mesh, remove impurity particles to obtain pure sericite; add the pure sericite to a dilute hydrochloric acid solution, and stir and react at 40 °C for 2 h; after the reaction is completed, centrifuge and wash with deionized water until the washing liquid is neutral to obtain the pretreated sericite.

[0013] Preferably, the preparation method of the organophilic sericite is as follows: take the pretreated sericite, add 1000 parts of deionized water and ultrasonicate for 30 min to obtain a pretreated sericite dispersion; dissolve aluminum tripolyphosphate in 500 parts of deionized water to obtain an aluminum tripolyphosphate solution; slowly add the pretreated sericite dispersion to the aluminum tripolyphosphate solution, and under the condition of a constant temperature water bath at 50 °C, stir and react at a speed of 300 rpm for 3 h to obtain a precursor dispersion of organophilic sericite; dissolve chitosan in 500 parts of deionized water containing 5% acetic acid, and fully dissolve to obtain a chitosan solution; add the chitosan solution and 0.5 part of concentrated sulfuric acid to the precursor dispersion of organophilic sericite to obtain a grafted precursor dispersion of organophilic sericite; in the above reaction system, add sodium alginate, and at the same time dropwise add an aqueous calcium chloride solution; the concentration of the aqueous calcium chloride solution is 1.1 wt%; at room temperature, stir and react at a speed of 200 rpm for 2 h to obtain an intermediate dispersion of organophilic sericite; take 6.5 - 9.5 parts of silane, add it to 500 parts of absolute ethanol, then add 6 parts of deionized water, add hydrochloric acid, adjust the pH to 2.5, and stir at room temperature for 1 h to hydrolyze the silane to obtain a silane hydrolysis solution; add the intermediate dispersion of organophilic sericite to the silane hydrolysis solution, and under the condition of 60 °C, stir and react at a speed of 350 rpm for 5 h, filter, wash with water and dry to obtain the organophilic sericite.

[0014] On the other hand, the present invention provides the application of the organophilic sericite in an environmentally friendly anti-corrosion coating, and the application of the organophilic sericite in the environmentally friendly anti-corrosion coating; the organophilic sericite is any one of the above; the preparation method of the environmentally friendly anti-corrosion coating is as follows: add 13 - 18 parts of the organophilic sericite, 3.0 - 5.0 parts of talc powder, 56 - 62 parts of a waterborne resin, 2.5 parts of nano-titanium dioxide, 1.5 - 2.5 parts of carboxyethyl cellulose, 1 part of polydimethylsiloxane and 14 - 18 parts of deionized water to a high-speed mixer, and mix and stir at 1000 rpm for 30 min to obtain the environmentally friendly anti-corrosion coating.

[0015] Preferably, the preparation method of the waterborne resin is as follows:

[0016] 50 parts of polyethylene glycol, 30 parts of butanediol, 45 parts of adipic acid and 25 parts of phthalic anhydride were added into the reaction system. Then, 1.0 part of p-toluenesulfonic acid catalyst was added. After stirring evenly, the temperature was raised to 180 °C, the reaction rotation speed was controlled at 200 rpm, the water generated during the reaction was collected, and polyester was obtained after reacting for 6 h.

[0017] 1.9 parts of sodium dodecyl sulfate was added to 1000 parts of deionized water to obtain an emulsion; 30.0 - 33.0 parts of methyl methacrylate, 32.0 - 35.0 parts of trifluoroethyl methacrylate, 44.8 - 46.5 parts of perfluorooctyl acrylate and 46.0 - 49.5 parts of allicin were mixed to obtain a mixture; the mixture was slowly added to the emulsion, and stirred at 300 rpm for 40 min to obtain a liquid to be polymerized; the liquid to be polymerized was raised to 60 - 70 °C, and 30 parts of an aqueous solution of potassium persulfate with a concentration of 3 wt% was added, and a polymerized liquid precursor was obtained after reacting for 4.0 - 5.0 h; 18.7 - 21.0 parts of glycidyl methacrylate and 10 parts of an aqueous solution of potassium persulfate were added to the polymerized liquid precursor, and the reaction continued for 1.5 h to obtain a polymerized liquid; the polyester was added to the polymerized liquid, and 0.5 part of concentrated sulfuric acid and KH560 hydrolysis solution were added, and after reacting for 2 h, an aqueous resin precursor was obtained; 8 - 12 parts of nano-silver zeolite was added to the aqueous resin precursor, and 6.0 - 6.5 parts of polycarbodiimide crosslinking agent was added, and the stirring reaction continued for 80 min to obtain an aqueous resin intermediate; after cooling to room temperature, it was continuously stirred at 1000 rpm for 15 min to obtain an aqueous resin.

[0018] Preferably, the preparation method of the KH560 hydrolysis solution is as follows: 6 parts of KH560 was taken, added to 12.8 parts of absolute ethanol and 3.2 parts of deionized water, the pH value was adjusted to 4, and stirred and hydrolyzed for 30 min to obtain the KH560 hydrolysis solution.

[0019] Preferably, the preparation method of nano silver zeolite is as follows: Disperse 50 parts of zeolite in 500 parts of deionized water and ultrasonicate for 30 min to obtain a uniformly distributed zeolite dispersion; Dissolve 10 - 14 parts of silver nitrate in deionized water to obtain a silver nitrate solution with a concentration of 4 wt%; Dissolve 5.0 - 6.0 parts of citric acid in deionized water to obtain a citric acid solution with a concentration of 5 wt%; Under a stirring speed of 300 rpm, slowly add the silver nitrate solution dropwise into the citric acid solution. After the addition is complete, raise the temperature to 70 - 80 °C and continuously react for 1.5 h to obtain nano silver sol; Add the nano silver sol into the zeolite dispersion preheated to 80 °C and continue stirring for 2 h to obtain a silver ion-loaded zeolite dispersion; After cooling to room temperature, add a sodium hydroxide solution with a concentration of 4 wt% dropwise into the silver ion-loaded zeolite dispersion until the pH is 10 - 11 to obtain a nano silver hydroxide-loaded zeolite dispersion; Then centrifuge, repeatedly wash the lower precipitate with deionized water, and finally vacuum dry at 60 °C for 70 - 80 h to obtain nano silver zeolite.

[0020] In this process, citric acid acts as both a reducing agent and a stabilizer. The hydroxyl and carboxyl groups in the citric acid molecule can complex with silver ions, and then reduce the silver ions to nano silver particles. At the same time, the citric acid molecules adsorb on the surface of the nano silver particles to prevent their aggregation, forming a stable nano silver sol.

[0021] Preferably, the zeolite is one of A-type zeolite and ZSM-5 zeolite.

[0022] Preferably, the zeolite is ZSM-5 zeolite.

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

[0024] 1. By soaking sericite in a dilute hydrochloric acid solution, the hydroxyl groups on its surface are activated. Then, the surface-activated pretreated sericite is subjected to an organic modification treatment. By introducing aluminum tripolyphosphate onto the surface of sericite, and then reacting with chitosan and sodium alginate, adding a calcium chloride solution for crosslinking and then adding a silane hydrolysis solution, the above substances are connected by chemical bonds and a crosslinked network structure is formed on the surface of sericite. The sericite surface contains a large number of active groups, which promotes its crosslinking with substances such as waterborne resins. Through the organic treatment of sericite, the environmentally friendly anti-corrosion coating has good corrosion resistance to acids, alkalis, and salts.

[0025] 2. By adding hydrolyzed silane during the preparation of organic sericite, screening the types and dosages of silane, so that its chemical bonds are bonded to the surface of sericite after hydrolysis; by preparing an aqueous resin precursor, adjusting the dosages of the raw materials trifluoroethyl methacrylate and perfluorooctyl acrylate used in the preparation, and adjusting the reaction time, so that unsaturated bonds copolymerize under the action of an initiator, introducing silicon and fluorine elements into the coating; the organic sericite and the aqueous resin cooperate, thereby further improving the anti-corrosion performance of the coating and enhancing the tolerance of the coating to the humid and hot environment.

[0026] 3. By adding allicin during the preparation of the aqueous resin intermediate, making it crosslink and polymerize with substances such as methyl methacrylate, and adding the prepared nano-silver zeolite after preparing the aqueous resin precursor, so that the nano-silver zeolite is connected to the aqueous resin precursor by chemical bonds; by adjusting the preparation method of the nano-silver zeolite, including adjusting the dosages of substances and the reaction time, so that nano-silver oxide particles are evenly dispersed in the nano-zeolite and have good binding properties with the nano-zeolite; the component nano-silver zeolite of the aqueous resin crosslinks with other components, making the prepared environmentally friendly anti-corrosion coating have a good inhibitory effect on molds.

[0027] 4. By adding methyl methacrylate during the preparation of the aqueous resin, after its copolymerization with other components, the adhesion of the coating is finally increased; by adding glycidyl methacrylate in segments during the preparation process, epoxy groups are introduced into the aqueous resin to avoid the destruction of the epoxy groups, and then it reacts with the surface groups of nano-silver zeolite and organic sericite through epoxy ring-opening reaction, improving the degree of polymerization of each component; and by reasonably proportioning the components of the epoxy anti-corrosion coating, the adhesion of the environmentally friendly anti-corrosion coating is increased, and the mechanical properties remain good after being corroded by acids, alkalis and salts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a graph showing the tensile strength retention rate results of the environmentally friendly anti-corrosion coatings of Examples 9, 12 - 14 and Comparative Examples 23 - 26 of the present invention after being corroded by acids, alkalis and salts. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figure 1, the present invention provides organophilic sericite and its application in an environmentally friendly anti-corrosion coating. The technical solution is as follows:

[0031] Example 1

[0032] The preparation method of organophilic sericite is as follows:

[0033] Crush the sericite to be treated to an average particle size of 800 mesh, remove impurity particles to obtain pure sericite; add the pure sericite to a dilute hydrochloric acid solution with a concentration of 5 wt%, control the solid-liquid ratio to 1:8, and stir and react at 40 °C for 2 h; after the reaction, perform solid-liquid separation by centrifugation, and wash the lower-layer solid with deionized water until the washing liquid is neutral to remove metal impurities on the surface of the sericite and activate the hydroxyl groups on its surface to obtain pretreated sericite;

[0034] Take 100 parts of pretreated sericite, add 1000 parts of deionized water and ultrasonicate for 30 min to obtain a pretreated sericite dispersion; dissolve 10 parts of aluminum tripolyphosphate in 500 parts of deionized water to obtain an aluminum tripolyphosphate solution; slowly add the pretreated sericite dispersion to the aluminum tripolyphosphate solution, and under the condition of a constant temperature water bath at 50 °C, stir and react at a speed of 300 rpm for 3 h to obtain a precursor dispersion of organophilic sericite; dissolve 5 parts of chitosan (degree of deacetylation 85%) in 500 parts of deionized water containing 5% acetic acid, and fully dissolve to obtain a chitosan solution; add the chitosan solution and 0.5 part of concentrated sulfuric acid to the precursor dispersion of organophilic sericite to obtain a grafted precursor dispersion of organophilic sericite; in the above reaction system, add 3 parts of sodium alginate, and simultaneously dropwise add 20 parts of an aqueous calcium chloride solution (concentration 1.1 wt%), and at room temperature, stir and react at a speed of 200 rpm for 2 h to obtain an intermediate dispersion of organophilic sericite; take 8 parts of silane trimethoxysilyl methanethiol, add it to 500 parts of absolute ethanol, then add 6 parts of deionized water, add hydrochloric acid, adjust the pH to 2.5, and stir at room temperature for 1 h to hydrolyze the silane to obtain a silane hydrolysis solution; add the intermediate dispersion of organophilic sericite to the silane hydrolysis solution, and under the condition of 60 °C, stir and react at a speed of 350 rpm for 5 h, filter, wash with water and dry to obtain organophilic sericite;

[0035] Add 50 parts of polyethylene glycol (molecular weight 400), 30 parts of butanediol, 45 parts of adipic acid and 25 parts of phthalic anhydride to the reaction system, then add 1.0 part of p-toluenesulfonic acid catalyst, stir evenly and raise the temperature to 180 °C, control the reaction speed to 200 rpm, collect the water generated during the reaction, and react for 6 h to obtain a polyester; the acid value at this time is 30 mg KOH / g;

[0036] 1.9 parts of sodium dodecyl sulfate was added to 1000 parts of deionized water to obtain an emulsion; 30.0 parts of methyl methacrylate, 33.6 parts of trifluoroethyl methacrylate, 45.4 parts of perfluorooctyl acrylate and 48.7 parts of allicin were mixed to obtain a mixture; the mixture was slowly added to the emulsion and stirred at 300 rpm for 40 min to obtain a polymerization solution to be polymerized; the polymerization solution to be polymerized was heated to 65 °C, and 30 parts of an aqueous solution of potassium persulfate with a concentration of 3 wt% was added, and after reacting for 4.5 h, a polymerization solution precursor was obtained; 18.7 parts of glycidyl methacrylate and 10 parts of an aqueous solution of potassium persulfate with a concentration of 3 wt% were added to the polymerization solution precursor, and the reaction was continued for 1.5 h to obtain a polymerization solution; polyester was added to the polymerization solution, and 0.5 part of concentrated sulfuric acid and KH560 hydrolysis solution were added, and after continuing to react for 2 h, an aqueous resin precursor was obtained; 10 parts of nano silver zeolite was added to the aqueous resin precursor, and 6 parts of polycarbodiimide crosslinking agent was added, and the stirring reaction was continued for 80 min to obtain an aqueous resin intermediate; after cooling to room temperature, stirring was continued at 1000 rpm for 15 min to obtain an aqueous resin;

[0037] 6 parts of coupling agent (KH560) was taken and added to 12.8 parts of absolute ethanol and 3.2 parts of deionized water, and the pH value was adjusted to 4 with hydrochloric acid, and stirred and hydrolyzed for 30 min to obtain KH560 hydrolysis solution;

[0038] The preparation method of nano silver zeolite is as follows:

[0039] 50 parts of zeolite was dispersed in 500 parts of deionized water, and ultrasonic treatment was carried out for 30 min to obtain a uniformly distributed zeolite dispersion; 10 parts of silver nitrate was added to deionized water and dissolved to obtain a silver nitrate solution with a concentration of 4 wt%; 5 parts of citric acid was dissolved in deionized water to obtain a citric acid solution with a concentration of 5 wt%; under a stirring speed of 300 rpm, the silver nitrate solution was slowly added dropwise to the citric acid solution, and after the addition was completed, the temperature was raised to 80 °C and the reaction was continued for 1.5 h to obtain nano silver sol; the nano silver sol was added to the zeolite dispersion preheated to 80 °C, and stirring was continued for 2 h to obtain a silver ion loaded zeolite dispersion; after cooling to room temperature, a sodium hydroxide solution with a concentration of 4 wt% was added dropwise to the silver ion loaded zeolite dispersion until the pH was 10 to obtain a nano silver hydroxide loaded zeolite dispersion; then centrifuged, the lower precipitate was repeatedly washed with deionized water, and finally vacuum dried at 60 °C for 72 h to obtain nano silver zeolite; the zeolite was ZSM-5 zeolite;

[0040] 15 parts of organicized sericite, 5 parts of talcum powder, 60 parts of aqueous resin, 2.5 parts of nano titanium dioxide, 1.5 parts of carboxyethyl cellulose, 1 part of polydimethylsiloxane and 15 parts of deionized water were added to a high-speed mixer and mixed and stirred at 1000 rpm for 30 min to obtain an environmentally friendly anti-corrosion coating.

[0041] Example 2-5

[0042] Different from Example 1, the preparation method of the organic sericite and the dosage of the organic sericite in the environmental protection anti-corrosion coating are changed, as shown in Table 1 specifically.

[0043] Table 1 Preparation method and dosage of organic sericite

[0044]

[0045] Comparative Example 1

[0046] Different from Example 1, the pure sericite is not treated by soaking in dilute hydrochloric acid.

[0047] Comparative Example 2

[0048] Different from Example 1, aluminum tripolyphosphate is not added.

[0049] Comparative Example 3

[0050] Different from Example 1, chitosan is not added.

[0051] Comparative Example 4

[0052] Different from Example 1, sodium alginate is not added.

[0053] Comparative Example 5

[0054] Different from Example 1, an aqueous calcium chloride solution is not added.

[0055] Comparative Example 6

[0056] Different from Example 1, the pretreated sericite is not organically treated, and the organic sericite in the environmental protection anti-corrosion coating is replaced with the same number of parts of pretreated sericite.

[0057] Comparative Example 7

[0058] Different from Example 1, no pretreated sericite or organic sericite is added to the environmental protection anti-corrosion coating.

[0059] Experimental Example 1

[0060] The anti-corrosion performance of the environmental protection anti-corrosion coatings prepared in Examples 1-5 and Comparative Examples 1-7 was tested. Specifically, refer to GB / T30790.6-2014 "Paints and varnishes - Corrosion protection of steel structures by protective paint systems - Part 6: Laboratory performance testing methods". Specifically, the time when phenomena such as dissolution, swelling, discoloration, and peeling began to appear was regularly checked in the chemical vapor prepared from 5% sulfuric acid solution, 5% sodium hydroxide solution, and 3% sodium chloride solution, and recorded in Table 2.

[0061] Table 2 Anti-corrosion performance test results of the environmentally friendly anti-corrosion coatings prepared in Examples 1-5 and Comparative Examples 1-7

[0062]

[0063]

[0064] The environmentally friendly anti-corrosion coating prepared by the present invention, under the conditions of Examples 1-5, has an acid fog resistance time of 740-770 h, an alkali fog resistance time of 980-1020 h, and a salt fog resistance time of 1240-1280 h. In Examples 1-5, by adjusting the solid-liquid ratio of the immersion of pure sericite and dilute hydrochloric acid solution, the metal impurities on the surface of sericite were removed, and the surface hydroxyl groups were activated, enabling sericite to better react with the substances added subsequently, enhancing its dispersibility in the coating and the binding force with other components, thereby improving the tolerance of the coating to acid, alkali, and salt fog; by using aluminum tripolyphosphate to perform surface treatment on the pretreated sericite, by controlling the dosage of the two, the hydrogen atoms of the hydroxyl groups on the sericite surface combine with the oxygen atoms of the phosphorus-oxygen groups in aluminum tripolyphosphate to generate water molecules, and new Si-O-P bonds are formed. In addition, aluminum tripolyphosphate bonds to the surface of the pretreated sericite through coordination with metal ions such as potassium and aluminum in the sericite lattice; then the hydroxyl groups of the introduced chitosan react with the phosphate groups, and an aqueous solution of sodium alginate and calcium chloride is added. The hydroxyl groups of sodium alginate react with the phosphate groups. At the same time, the carboxyl groups of sodium alginate carry out an esterification reaction with the hydroxyl groups on the surfaces of the pretreated sericite and chitosan, and the calcium ions in calcium chloride crosslink with sodium alginate; the subsequently added silane hydrolysis solution undergoes a dehydration condensation reaction with the hydroxyl groups in the system, thereby forming an organic protective layer on the pretreated sericite, forming a more complex and stable structure; by adjusting the dosage of the organically modified sericite, its crosslinking with the waterborne resin is promoted, improving the anti-corrosion effect. When corrosive ions in acid, alkali, or salt fog attempt to penetrate the coating, aluminum tripolyphosphate can undergo a chemical reaction with these ions, consuming the corrosive ions, thereby slowing down the corrosion of the coating and the substrate; the formed protective layer also has a good barrier effect on acid, alkali, or salt fog; the amino group of chitosan has a certain alkalinity and can neutralize part of the hydrogen ions in an acidic environment, playing a buffering role; sodium alginate reacts with calcium chloride to form a gel network structure, and after grafting with sericite, the denseness of the coating is further enhanced; it can effectively resist the erosion of corrosive substances, prevent the coating from peeling off and being damaged. In the face of acid, alkali, and salt fog, this gel network can effectively block the diffusion of corrosive substances. From the results in Table 2, it can be seen that the salt fog tolerance effect of the coating is higher than the alkali fog tolerance effect, and the acid fog tolerance effect is the worst. Acidic substances may have stronger corrosiveness to certain components in the coating, such as may undergo chemical reactions with metal ions, organic groups, etc. in the coating, resulting in a decline in the coating performance, so the acid resistance is relatively weak. In Comparative Example 1, without the dilute hydrochloric acid immersion treatment, the hydroxyl groups on the surface of pure sericite cannot be activated, and the grafting reaction cannot proceed well, resulting in a decline in the anti-corrosion effect; in Comparative Examples 2-5, without adding any one of aluminum tripolyphosphate, chitosan, sodium alginate, and calcium chloride aqueous solution, the anti-corrosion effect is reduced compared with that of the examples.In Comparative Example 6, the pretreated sericite was not organically treated, so the pretreated sericite could not be further crosslinked and fused with the system, and the anti-corrosion performance decreased further. Sericite itself has a flaky crystal structure. In the coating, these flaky particles can overlap and interleave with each other to form a structure similar to a "maze". When corrosive substances in acids, alkalis and salt mists, such as hydrogen ions, hydroxide ions, chloride ions, etc., try to penetrate the coating, they will constantly change their paths in this maze structure, greatly increasing the distance and difficulty of their diffusion, thus effectively blocking these corrosive substances from reaching the surface of the protected substrate. It is mainly composed of elements such as silicon, aluminum, and potassium, and its crystal structure is tight. Sericite itself is not easy to chemically react with these corrosive substances and pass through. In addition, sericite synergizes with other components in the system to jointly improve the anti-corrosion effect of the coating. In Comparative Example 7, sericite was not contained, and the anti-corrosion performance was greatly reduced.

[0065] Examples 6 - 8

[0066] Different from Example 3, the preparation method of the waterborne resin was changed, and the types and amounts of silanes in the organically treated sericite were changed, as shown in Table 3 specifically.

[0067] Table 3 Preparation method of waterborne resin and types and amounts of silanes

[0068]

[0069] Comparative Example 8

[0070] Different from Example 3, silane was not added during the preparation of the organically treated sericite.

[0071] Comparative Example 9

[0072] Different from Example 3, the silane was not hydrolyzed during the preparation of the organically treated sericite.

[0073] Comparative Example 10

[0074] Different from Example 3, trifluoroethyl methacrylate was not added.

[0075] Comparative Example 11

[0076] Different from Example 3, perfluorooctyl acrylate was not added.

[0077] Comparative Example 12

[0078] Different from Example 3, the reaction temperature was 70 °C and the reaction time was 2 h.

[0079] Comparative Example 13

[0080] Different from Example 3, the reaction temperature was 40 °C and the reaction time was 5 h.

[0081] Comparative Example 14

[0082] Trifluoroethyl methacrylate, perfluorooctyl acrylate and silane were not added.

[0083] Experimental Example 2

[0084] The environmentally friendly anti-corrosion coatings prepared in Examples 3, 6 - 8 and Comparative Examples 8 - 14 were subjected to anti-corrosion performance testing and waterproof performance testing; the testing method for anti-corrosion performance testing was carried out with reference to Experimental Example 1; the waterproof performance testing was carried out with reference to GB / T 1740 - 2007 "Determination of Damp Heat Resistance of Paint Films": The testing was carried out in a damp heat test chamber at a temperature of 47°C and a relative humidity of 96%. The blistering, rusting, discoloration, etc. of the coating were inspected at the specified time, and the time was recorded. The test results are shown in Table 4.

[0085] Table 4 Test Results of Anti-corrosion Performance and Waterproof Performance of Environmentally Friendly Anti-corrosion Coatings in Examples 3, 6 - 8 and Comparative Examples 8 - 14

[0086]

[0087] The environmentally friendly anti-corrosion coating prepared by the present invention, under the conditions of Examples 3 and 6-8, has an acid fog resistance time of 750-790 h, an alkali fog resistance time of 970-1030 h, a salt fog resistance time of 1260-1290 h, and a damp heat resistance time of 510-530 h. The results in Table 3 and Table 4 show that in Examples 3 and 6-8, by adjusting the type and dosage of silane, after the hydrolysis of methyltrimethoxysilane, its methoxy group will react with the hydroxyl groups on the surface of sericite to form siloxane bonds, making the surface of sericite organicized and enhancing its compatibility with other organic components in the coating; while in addition to achieving a similar surface organicization, the methacryloyloxymethyltrimethoxysilane contains methacryloyloxy groups that can participate in subsequent polymerization reactions, further enhancing the crosslinking degree and structural stability of the coating; the thiol group in trimethoxysilylmethyl mercaptan can interact with metal ions, and in a coating system containing a metal substrate, it can improve the adhesion between the coating and the substrate and enhance the stability of the coating in a damp heat and corrosive environment; by adjusting the raw materials, reaction temperature and time for preparing the aqueous resin precursor, the raw materials containing unsaturated double bonds copolymerize. The molecule of trifluoroethyl methacrylate contains fluorine atoms, and fluorine atoms have high electronegativity and small atomic radius; after participating in the polymerization reaction, it will enhance the interaction between polymer segments and form a more compact structure; in a damp heat environment, this compact structure can effectively block the penetration of moisture and improve the damp heat resistance of the coating. At the same time, the fluorine-containing structure can also enhance the chemical stability of the coating, making its resistance to corrosive substances such as acids and alkalis stronger and improving the anti-corrosion performance; the introduced perfluorooctyl acrylate contains a long perfluoroalkyl chain and has an extremely low surface energy. After participating in the polymerization, it will accumulate on the surface of the coating to form a low surface energy protective film; in a damp heat environment, this protective film can prevent the adsorption and spreading of moisture on the surface of the coating, reducing the chance of moisture entering the interior of the coating, thereby improving the damp heat resistance; due to its extremely low surface energy, corrosive substances are difficult to adhere to the surface of the coating, further enhancing the anti-corrosion performance of the coating. By adjusting the reaction temperature and time, the polymerization reaction is made complete. In Comparative Example 8, no silane was added, the surface of sericite was not completely organicized, and the anti-corrosion performance and damp heat resistance decreased; in Comparative Example 9, the silane was not hydrolyzed, the compatibility between the silane and sericite and the coating components became poor, and the coating performance decreased; in Comparative Examples 10 and 11, trifluoroethyl methacrylate and perfluorooctyl acrylate were not added respectively, and the anti-corrosion performance and damp heat resistance decreased; in Comparative Examples 12 and 13, the reaction temperature was too high or too low, and the reaction time was too long or too short, which were not conducive to the synthesis of the aqueous resin and reduced the coating performance; in Comparative Example 14, no compounds containing silicon and fluorine elements were added, and the anti-corrosion and damp heat resistance of the coating decreased significantly.

[0088] Examples 9-11

[0089] Different from Example 6, the preparation methods of the aqueous resin and the nano-silver zeolite were changed, as specifically shown in Table 5.

[0090] Table 5 Preparation methods of the aqueous resin and the nano-silver zeolite

[0091]

[0092] Comparative Example 15

[0093] Different from Example 6, allicin was not added.

[0094] Comparative Example 16

[0095] Different from Example 6, nano-silver zeolite was not added.

[0096] Comparative Example 17

[0097] Different from Example 6, the type of zeolite was A-type zeolite.

[0098] Comparative Example 18

[0099] Different from Example 6, the zeolite was not treated.

[0100] Comparative Example 19

[0101] Different from Example 6, silver nitrate was not added.

[0102] Comparative Example 20

[0103] Different from Example 6, citric acid was not added.

[0104] Comparative Example 21

[0105] Different from Example 6, the pH was 6.0.

[0106] Comparative Example 22

[0107] Different from Example 6, the vacuum drying time was 6 h.

[0108] Experimental Example 3

[0109] The antibacterial properties of the environmentally friendly anticorrosive coatings prepared in Example 6, Examples 9 - 11 and Comparative Examples 15 - 22 were measured. Specifically, it was carried out with reference to GB / T 1766 - 2008 "Rating method for the ageing of coatings of paints and varnishes". The final test results are shown in Table 6, where: Grade 0 indicates no mildew spots, Grade 1 indicates very few mildew spots, Grade 2 indicates sparse and few mildew spots, Grade 3 indicates a medium number of mildew spots, Grade 4 indicates a relatively large number of mildew spots, and Grade 5 indicates intensive mildew spots; at the same time, the anticorrosive performance of the environmentally friendly anticorrosive coating obtained in Example 9 was tested.

[0110] Table 6 Antibacterial performance test results of Examples 6, 9 - 11 and Comparative Examples 15 - 22

[0111] Mildew quantity level Mildew quantity level Example 6 0 Comparative Example 17 1 Example 9 0 Comparative Example 18 3 Example 10 0 Comparative Example 19 3 Example 11 0 Comparative Example 20 1 Comparative Example 15 1 Comparative Example 21 3 Comparative Example 16 4 Comparative Example 22 2

[0112] The environmentally friendly anti-corrosion coating prepared by the present invention has a mold growth quantity grade of 0 under the conditions of Examples 6, 9-11, with no mold growth and good antibacterial performance. The environmentally friendly anti-corrosion coating of Example 9 has an acid mist resistance time of 780 h, an alkali mist resistance time of 1020 h, a salt mist resistance time of 1290 h, and a damp heat resistance time of 520 h. In Examples 6, 9-11, by adjusting the dosage of allicin, adjusting the dosage of nano silver zeolite added, and selecting the type of zeolite and changing the preparation method of zeolite, the antibacterial performance of the environmentally friendly anti-corrosion coating is good. By adding allicin to the water-based resin, the unsaturated double bonds of allicin copolymerize with the double bonds of substances such as methyl methacrylate and trifluoroethyl methacrylate, thereby introducing allicin into the reaction system. By destroying cell membranes, inhibiting enzyme activity, interfering with energy metabolism, triggering oxidative stress reactions, inhibiting biosynthesis and spore germination, the growth of molds is inhibited; the nano silver particles in the nano silver zeolite can release silver oxide nanoparticles, which have high activity. It can interact with a variety of biomolecules in mold cells and can destroy the integrity and permeability of cell membranes. Zeolite has a special porous structure with a large specific surface area, which can provide a stable carrier for nano silver particles; this porous structure can not only make the nano silver particles evenly distributed inside and on the surface of the zeolite, improve the stability of the nano silver particles, and reduce their agglomeration phenomenon, but also make the nano silver particles more effectively contact mold cells, enhancing the antibacterial effect; and can achieve a lasting antibacterial effect. Before adding the nano silver zeolite to the water-based resin precursor, the silicon hydroxyl groups on the surface of the nano silver-loaded zeolite and the amino groups on the surface of the organically modified sericite form chemical bond connections through condensation and other reactions, and dehydrate and condense to form Si-N bonds, thereby integrating the nano silver zeolite with the organic resin through chemical bonds; by optimizing the preparation method of the nano silver zeolite, dropping silver nitrate solution into the citric acid solution, during the reaction process, citric acid serves as both a reducing agent and a stabilizer. Appropriate reaction temperature and time can fully reduce silver ions to nano silver particles and maintain their stability and dispersion. By adjusting the pH, the silver ions complexed with citric acid are converted into silver hydroxide. Finally, after vacuum drying, the hydrogen-oxygen bonds in the silver hydroxide molecules break, the hydrogen atoms combine with the oxygen atoms to form water molecules and escape, while the silver atoms recombine to form nano silver oxide, which has a good inhibitory effect on molds.In Comparative Example 15, allicin was not added, resulting in a decrease in the inhibitory effect on molds; in Comparative Example 16, the absence of nano-silver zeolite also led to a decrease in the inhibitory performance on molds; in Comparative Example 17, the type of zeolite was A-type zeolite, and the performance of inhibiting molds decreased. This is because A-type zeolite has a cubic crystal system (the crystal axes a, b, and c are perpendicular to each other and have equal lengths), while the type of zeolite in the examples is an orthorhombic crystal system. The crystal system of the zeolite in the examples has a certain similarity with the monoclinic crystal of sericite in terms of the axial directionality and angular relationship. This relatively closer structural feature makes it easier to adjust the arrangement of atoms or ions when forming a composite structure, thus possibly showing better compatibility and intercalation, and increasing the compatibility; in Comparative Example 18, the zeolite was not treated, resulting in poor compatibility with the components; in Comparative Example 19, nano-silver oxide that could be uniformly distributed on the zeolite could not be formed; in Comparative Example 20, citric acid was not added, resulting in poor loading of nano-silver oxide on the zeolite, which in turn affected the antibacterial effect; in Comparative Example 21, the pH of the system was too low to form silver hydroxide, and thus silver oxide was formed; in Comparative Example 22, the drying time was too short, and silver oxide could not be completely formed.

[0113] Examples 12 - 14

[0114] Different from Example 9, the preparation method of the waterborne resin was changed, and the component dosages of the environmentally friendly anti-corrosion coating were changed, as specifically shown in Table 7.

[0115] Table 7 Preparation of Waterborne Resin and Formulation of Environmentally Friendly Anti-Corrosion Coating

[0116]

[0117]

[0118] Comparative Example 23

[0119] Different from Example 9, methyl methacrylate was not added.

[0120] Comparative Example 24

[0121] Different from Example 9, (glycidoxy)ethyl methacrylate was directly mixed with methyl methacrylate, trifluoroethyl methacrylate, perfluorooctyl acrylate, and allicin for reaction, rather than being added and continuing to react for 1.5 h after the reaction ended.

[0122] Comparative Example 25

[0123] Different from Example 9, KH560 was not added.

[0124] Comparative Example 26

[0125] Different from Example 9, the dosage of the organically modified sericite is 25 parts, the dosage of the talcum powder is 10 parts, the dosage of the waterborne resin is 45 parts, the dosage of the nano-titanium dioxide is 2.5 parts, the dosage of the carboxyethyl cellulose is 5 parts, the dosage of the polydimethylsiloxane is 1 part, and the dosage of the deionized water is 7.5 parts.

[0126] Experimental Example 4

[0127] The adhesion of the environmentally friendly anti-corrosion coatings prepared in Example 9, Examples 12 - 14 and Comparative Examples 23 - 26 was tested. The adhesion test was carried out with reference to GB / T 9286 - 1998 "Cross-Cut Test for Paints and Varnishes - Films", and the adhesion grade decreases from 1 to 4 in sequence; and the anti-corrosion performance test was carried out to investigate the change of mechanical strength. The mechanical strength test was carried out with reference to GB / T 10654 - 2001 "Determination of Tensile Strength and Elongation at Break of High Polymer Porous Elastic Materials", and with reference to the test method of Experimental Example 1, the changes of the tensile strength and the elongation at break after 720 h of acid mist corrosion, 900 h of alkali mist corrosion and 1000 h of salt mist corrosion were respectively tested. The final test results are shown in Table 8 and Figure 1 as follows.

[0128] Table 8 Test Results of Adhesion and Anti-Corrosion Performance of Example 9, Examples 12 - 14 and Comparative Examples 23 - 26

[0129]

[0130]

[0131] For the environmentally friendly anti-corrosion coatings prepared by the present invention, under the conditions of Example 9, Examples 12 - 14, the adhesion grade is 0, and the tensile strength is 1.4 - 1.8 MPa. Table 8 and Figure 1It is shown that the retention rates of tensile strength after acid mist treatment, alkali mist treatment and salt mist treatment are 54%-56%, 73%-75% and 87%-91% respectively; the elongation at break is 360%-368%, and the elongation at break after acid mist treatment, alkali mist treatment and salt mist treatment are 198%-201%, 210%-212% and 223%-227% respectively. By adding glycidyl methacrylate to the component copolymerization and reacting for a period of time, substances containing polyethers and epoxy groups are introduced into the waterborne resin, avoiding the destruction of epoxy groups. Then, it reacts with the surface groups of nano-silver zeolite and organophilic sericite through epoxy ring-opening reaction, improving the degree of polymerization of each component, and rationally matching the dosages of substances such as talcum powder, waterborne resin, carboxyethyl cellulose and deionized water, so as to improve the adhesion of the environmental protection anti-corrosion coating and increase the anti-corrosion effect; methyl methacrylate participates in the polymerization reaction as the main monomer to form the main structure of the polymer, affecting the basic properties of the coating; its polymer has good hardness and glossiness, can make the coating surface smooth and flat, reduce the adhesion points of corrosive substances, and thus improve the anti-corrosion performance; at the same time, the structure formed by its copolymerization with other monomers helps to enhance the bonding force between the coating and the substrate, and has a promoting effect on adhesion; through free radical polymerization reaction, the carbon-carbon double bond of methyl methacrylate is opened and connected with the carbon-carbon double bonds of other monomers to form a long-chain polymer; in the coating, the interaction between polymer molecular chains and the interaction with the substrate surface, the ester group in the molecular structure has a certain polarity, and can form intermolecular forces (such as hydrogen bonds, van der Waals forces, etc.) with the polar groups on the substrate surface, thus enhancing the adhesion between the coating and the substrate; in Comparative Example 23, methyl methacrylate was not added, and the adhesion and anti-corrosion performance decreased. The epoxy group of glycidyl methacrylate has high reactivity and can participate in cross-linking reactions to form a three-dimensional network structure in the coating. The epoxy group will undergo ring-opening reaction and improve the adhesion and anti-corrosion effect after cross-linking polymerization with other components; in Comparative Example 24, glycidyl methacrylate was not finally added to react, and the cross-linking degree of the epoxy group with other components decreased, resulting in a decrease in the performance of the coating. The hydroxyl group contained after the hydrolysis of the coupling agent reacts with the carboxyl group in the system or reacts with other groups, improving the cross-linking degree of the system. At the same time, the introduction of silicon atoms further improves the anti-corrosion performance. In Comparative Example 25, KH560 was not added, and the coating performance decreased. Talcum powder has a flaky structure and is similar to organophilic sericite in the coating, and can overlap and arrange with each other to form a physical barrier layer. This barrier layer can block the penetration of moisture, oxygen and corrosive ions, etc.; at the same time, it can adjust the rheological properties of the coating, making the coating easier to be evenly coated during construction and improving the adhesion. In Comparative Example 26, the dosage ratio of each component was unreasonable, resulting in the worst adhesion of the coating, and its mechanical properties decreased greatly after acid, alkali and salt spray.

[0132] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Organized sericite, characterized by: The preparation method of the organic sericite is as follows: Add pure sericite to a 5wt% dilute hydrochloric acid solution, control the solid-liquid ratio to 1:5-1:10, centrifuge, wash and dry to obtain pretreated sericite; add 85-110 parts of the pretreated sericite to deionized water to obtain a pretreated sericite dispersion; add the treated sericite dispersion to an aluminum tripolyphosphate solution containing 8-12 parts of aluminum tripolyphosphate, add a chitosan solution containing 4.5-6.0 parts of chitosan after reaction, continue to add 2.0-3.5 parts of sodium alginate, and simultaneously drop 13-23 parts of a calcium chloride aqueous solution to obtain an organic sericite intermediate dispersion; hydrolyze silane to obtain a silane hydrolyzate; add the organic sericite intermediate dispersion to the silane hydrolyzate, filter, wash and dry after reaction to obtain the organic sericite; The silane is one of methyltrimethoxysilane, methacryloxymethyltrimethoxysilane and trimethoxysilylmethyl mercaptan.

2. The organized sericite according to claim 1, characterized in that: The preparation method of the pretreated sericite is as follows: crushing the sericite to be treated to an average particle size of 800 meshes, removing impurity particles, and obtaining the pure sericite; adding the pure sericite to the dilute hydrochloric acid solution, stirring and reacting at 40° C. for 2 hours; after the reaction is completed, centrifuging and washing with deionized water until the washing liquid is neutral, thereby obtaining the pretreated sericite.

3. The organized sericite according to claim 1, characterized in that: The preparation method of the organic sericite is as follows: taking the pretreated sericite, adding 1000 parts of the deionized water, and ultrasonicating for 30 minutes to obtain the pretreated sericite dispersion; dissolving the aluminum tripolyphosphate in 500 parts of the deionized water to obtain the aluminum tripolyphosphate solution; The pretreated sericite dispersion is slowly added to the aluminum tripolyphosphate solution, and the reaction is stirred at 300 rpm for 3 hours under a constant temperature water bath at 50°C to obtain an organic sericite precursor dispersion; the chitosan is dissolved in 500 parts of deionized water containing 5% acetic acid, and the chitosan solution is fully dissolved; the chitosan solution and 0.5 parts of concentrated sulfuric acid are added to the organic sericite precursor dispersion to obtain a grafted organic sericite precursor dispersion; the sodium alginate is added to the above reaction system, and the calcium chloride aqueous solution is added dropwise; the calcium chloride aqueous solution The concentration is 1.1wt%; at room temperature, the reaction is stirred at a speed of 200rpm for 2h to obtain the organic sericite intermediate dispersion; 6.5-9.5 parts of the silane are added to 500 parts of anhydrous ethanol, and then 6 parts of the deionized water are added, hydrochloric acid is added, the pH is adjusted to 2.5, and stirred at room temperature for 1h to hydrolyze the silane to obtain the silane hydrolyzate; the organic sericite intermediate dispersion is added to the silane hydrolyzate, and the reaction is stirred at a speed of 350rpm at 60°C for 5h, filtered, washed with water and dried to obtain the organic sericite.

4. The application of organic sericite in environmentally friendly anti-corrosion coatings is characterized by: The application of the organized sericite in the environmentally friendly anti-corrosion coating; the organized sericite is any one of claims 1-3; the preparation method of the environmentally friendly anti-corrosion coating is as follows: 13-18 parts of the organized sericite, 3.0-5.0 parts of talc, 56-62 parts of water-based resin, 2.5 parts of nano titanium dioxide, 1.5-2.5 parts of carboxyethyl cellulose, 1 part of polydimethylsiloxane and 14-18 parts of deionized water are added into a high-speed mixer, and mixed and stirred at 1000 rpm for 30 minutes to obtain the environmentally friendly anti-corrosion coating.

5. The use of the organic sericite in environmentally friendly anti-corrosion coating according to claim 4 is characterized by: The preparation method of the water-based resin is as follows: 50 parts of polyethylene glycol, 30 parts of butanediol, 45 parts of adipic acid and 25 parts of phthalic anhydride were added into the reaction system, and then 1.0 parts of p-toluenesulfonic acid catalyst was added. After stirring evenly, the temperature was raised to 180°C, the reaction speed was controlled to 200 rpm, and the water produced during the reaction was collected. The polyester was obtained after reacting for 6 hours. 1.9 parts of sodium dodecyl sulfate are added to 1000 parts of the deionized water to obtain an emulsion; 30.0-33.0 parts of methyl methacrylate, 32.0-35.0 parts of trifluoroethyl methacrylate, 44.8-46.5 parts of perfluorooctyl acrylate and 46.0-49.5 parts of allicin are mixed to obtain a mixture; the mixture is slowly added to the emulsion, and stirred at 300 rpm for 40 minutes to obtain a liquid to be polymerized; The temperature of the liquid to be polymerized is raised to 60-70° C., and 30 parts of a 3wt% potassium persulfate aqueous solution are added, and the reaction is continued for 4.0-5.0 hours to obtain a polymerization liquid precursor; 18.7-21.0 parts of methyl methacrylate (glycidyloxy)ethyl ester and 10 parts of the potassium persulfate aqueous solution are added to the polymerization liquid precursor, and the reaction is continued for 1.5 hours to obtain a polymerization liquid; the polyester is added to the polymerization liquid, and 0.5 parts of concentrated sulfuric acid and KH560 hydrolyzate are added, and the reaction is continued for 2 hours to obtain a water-based resin precursor; 8-12 parts of nano silver zeolite are added to the water-based resin precursor, and 6.0-6.5 parts of a polycarbodiimide crosslinking agent are added, and the reaction is continued with stirring for 80 minutes to obtain the water-based resin intermediate; after cooling to room temperature, stirring is continued at 1000 rpm for 15 minutes to obtain the water-based resin.

6. The use of the organic sericite in environmentally friendly anti-corrosion coating according to claim 5, characterized in that: The preparation method of the KH560 hydrolyzate is as follows: 6 parts of KH560 are added to 12.8 parts of anhydrous ethanol and 3.2 parts of the deionized water, the pH value is adjusted to 4, and the KH560 hydrolyzate is obtained by stirring and hydrolyzing for 30 minutes.

7. The use of the organic sericite in environmentally friendly anti-corrosion coating according to claim 5, characterized in that: The preparation method of the nano silver zeolite is as follows: 50 parts of zeolite are dispersed in 500 parts of deionized water, and ultrasonicated for 30 minutes to obtain a uniformly distributed zeolite dispersion; 10-14 parts of silver nitrate are added to the deionized water to dissolve to obtain a silver nitrate solution with a concentration of 4wt%; 5.0-6.0 parts of citric acid are dissolved in the deionized water to obtain a citric acid solution with a concentration of 5wt%; at a stirring speed of 300rpm, the silver nitrate solution is slowly dripped into the citric acid solution, and after the dripping is completed, the temperature is raised to 70 -80°C, continue the reaction for 1.5h to obtain nano silver sol; add the nano silver sol to the zeolite dispersion preheated to 80°C, continue stirring for 2h to obtain a silver ion loaded zeolite dispersion; after cooling to room temperature, dropwise add a 4wt% sodium hydroxide solution into the silver ion loaded zeolite dispersion until the pH is 10-11 to obtain a nano silver hydroxide loaded zeolite dispersion; then centrifuge, repeatedly wash the lower precipitate with deionized water, and finally vacuum dry at 60°C for 70-80h to obtain the nano silver zeolite.

8. The use of the organic sericite in environmentally friendly anti-corrosion coating according to claim 7, characterized in that: The zeolite is one of type A zeolite and ZSM-5 zeolite.

9. The use of the organic sericite in environmentally friendly anti-corrosion coating according to claim 8, characterized in that: The zeolite is the ZSM-5 zeolite.

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