A silicone high-temperature resistant anticorrosive coating composition and a preparation method thereof

Abstract

The present application belongs to the technical field of high-performance coating compositions, and particularly relates to a silicone high-temperature-resistant anticorrosive coating composition and a preparation method thereof. The preparation method of the silicone high-temperature-resistant anticorrosive coating composition comprises the following steps: S1, first, eugenol and epichlorohydrin are used as raw materials to prepare an eugenol epoxy intermediate, then the eugenol epoxy intermediate and methacryloyloxypropyl tris(trimethylsiloxy)silane are subjected to a polymerization reaction to obtain an eugenol epoxy silicone resin; S2, the eugenol epoxy silicone resin, a filler, a dispersing agent and a defoaming agent are added into a solvent and stirred uniformly to obtain component A, and a curing agent and cyclohexanone are mixed to obtain component B; S3, the component A and the component B are stirred and mixed, sprayed and formed, heated and cured to obtain the silicone high-temperature-resistant anticorrosive coating composition. The present application not only ensures that the coating has good high-temperature resistance, but also effectively improves salt spray resistance.

Description

Technical Field

[0001] This invention belongs to the technical field of high-performance coating compositions, specifically relating to an organosilicon high-temperature resistant anti-corrosion coating composition and its preparation method. Background Technology

[0002] The anti-corrosion principle of anti-corrosion coatings is to construct a physical or chemical barrier on the surface of the metal substrate, preventing the metal substrate from directly contacting the surrounding corrosive environment, thereby mitigating corrosion. To address the challenges of protecting substrates from harsh corrosive environments, research on the modification of anti-corrosion coatings is developing towards higher performance, more multifunctionality, and greater intelligence. Today, numerous advancements in modification technologies have greatly expanded the application boundaries of anti-corrosion coatings.

[0003] Organosilicon resin is mainly composed of silicon-oxygen bonds as the backbone, forming a complex and stable network structure through the connection of silicon atoms and organic groups. This structure gives it good heat resistance, chemical stability, excellent mechanical properties and electrical properties. Therefore, high-temperature resistant coatings prepared by using it as a film-forming material can still maintain good stability in harsh environments with high temperature, high pressure and strong chemical corrosion. Organosilicon anti-corrosion coatings have the following characteristics: (1) Excellent temperature resistance, because the bond energy of Si-O bonds in organosilicon resin is significantly higher than that of CO bonds and CC bonds, so it has excellent high temperature resistance; (2) Excellent corrosion resistance and weather resistance, the high bond energy of Si-O bonds in organosilicon molecules gives the coating extremely strong chemical stability; (3) Good insulation and hydrophobicity, the coating has excellent electrical insulation properties and low surface energy, so dust and dirt are not easy to adhere.

[0004] Chinese patent (publication number CN119979002A) discloses a composite organosilicon anti-corrosion coating and its preparation method. This composite organosilicon anti-corrosion coating, in addition to a solvent, includes the following raw materials in parts by weight: 80-95 parts of phenolic epoxy-modified organosilicon resin; 1.4-3.5 parts of an amine curing agent; 0.08-0.19 parts of lithium chloride; and 23-36 parts of filler. The amine curing agent includes polyamines. Under the action of the polyamine-containing amine curing agent and lithium chloride, the phenolic epoxy-modified organosilicon resin and filler are mixed and coated onto the metal surface, uniformly undergoing cross-linking curing of phenolic epoxy molecular chains (extension) and cross-linking curing of inter-chain branching of phenolic epoxy molecules, forming a composite organosilicon anti-corrosion coating. However, this patented technology focuses on improving the coating's impact resistance, hardness, and adhesion, lacking research on salt spray resistance, and its heat resistance also needs further optimization.

[0005] Therefore, there is an urgent need for a silicone high-temperature resistant and anti-corrosion coating composition, which uses modified silicone resin as the main component and works in conjunction with functional fillers to ensure that the coating has good high-temperature resistance and improve salt spray resistance. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a silicone high-temperature resistant anti-corrosion coating composition and its preparation method. The invention first prepares an eugenol epoxy intermediate using eugenol and epichlorohydrin as raw materials. Then, the eugenol epoxy intermediate and methacryloyloxypropyltris(trimethylsiloxane)silane are polymerized to obtain an eugenol epoxy silicone resin. Next, the eugenol epoxy silicone resin, filler, dispersant, and defoamer are added to a solvent and stirred until homogeneous to obtain component A. A curing agent and cyclohexanone are mixed to obtain component B. Finally, components A and B are stirred and mixed, sprayed, and cured by heating to obtain the silicone high-temperature resistant anti-corrosion coating composition.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: In a first aspect, the present invention provides a method for preparing an organosilicon high-temperature resistant anti-corrosion coating composition, comprising the following steps: S1. Eugenol epoxy intermediate is prepared by first using eugenol and epichlorohydrin as raw materials. Then, the eugenol epoxy intermediate and methacryloyloxypropyltris(trimethylsiloxane)silane are polymerized to obtain eugenol epoxy silicone resin. S2. Add the eugenol epoxy silicone resin, filler, dispersant and defoamer to the solvent and stir evenly to obtain component A. Mix the curing agent and cyclohexanone to obtain component B. S3. Mix the components A and B, spray the mixture onto a mold, and heat to cure it to obtain a silicone high-temperature resistant and anti-corrosion coating composition.

[0008] As a preferred technical solution of the present invention, component A in step S2 includes, by weight: 80-90 parts of eugenol epoxy silicone resin, 20-30 parts of filler, 1-3 parts of dispersant, 0.2-0.4 parts of defoamer, and 30-40 parts of solvent.

[0009] As a preferred embodiment of the present invention, component B in step S2 includes, by weight, 4-6 parts curing agent and 4-6 parts cyclohexanone.

[0010] As a preferred technical solution of the present invention, the components in step S3 are, by weight, 90-100 parts of component A and 8-12 parts of component B.

[0011] As a preferred technical solution of the present invention, the preparation steps of the eugenol epoxy intermediate in step S1 are as follows: by weight, 30-40 parts of eugenol and 50-60 parts of epichlorohydrin are mixed, then 1-2 parts of tetra-n-butylammonium bromide are added and heated to 90-100°C for 6-8 hours, then cooled to 55-65°C and 50-60 parts of sodium hydroxide solution with a mass concentration of 30% are added and kept warm for 6-8 hours, washed with water and dried to obtain the eugenol epoxy intermediate.

[0012] As a preferred embodiment of the present invention, the polymerization reaction in step S1 is as follows: by weight, 60-70 parts of methacryloyloxypropyltris(trimethylsiloxane), 20-30 parts of eugenol epoxy intermediate and 1.4-1.6 parts of azobisisobutyronitrile are added to 100-120 parts of xylene and sonicated for 50-60 minutes, then heated to 80-90°C and reacted for 24-30 hours, rotary evaporated and dried to obtain eugenol epoxy silicone resin.

[0013] This invention uses eugenol and epichlorohydrin as raw materials. First, tetra-n-butylammonium bromide is added as a catalyst and heated to carry out an etherification reaction. Then, sodium hydroxide solution is added at a lower temperature to carry out a ring-closing reaction, thereby forming an eugenol epoxy intermediate. Subsequently, the eugenol epoxy intermediate is mixed with methacryloyloxypropyltris(trimethylsiloxane)silane and subjected to free radical copolymerization under the action of azobisisobutyronitrile to finally obtain an eugenol epoxy silicone resin containing benzene rings and epoxy groups.

[0014] As a preferred embodiment of the present invention, the filler of component A in step S2 is selected from one or more of mica powder, talc powder, silicon carbide, silicon dioxide, and graphene.

[0015] The organosilicon high-temperature resistant anti-corrosion coating composition of the present invention can form a "maze effect" in the resin matrix by adding fillers. The fillers are uniformly dispersed and interspersed in the continuous organosilicon phase and randomly stacked, which completely blocks, twists and extends the original straight-through penetration channels inside the coating, constructs a tortuous barrier network, increases the penetration path of corrosive media, and improves the barrier ability of the coating.

[0016] As a preferred embodiment of the present invention, the filler for component A in step S2 is silicon dioxide and graphene; The mass ratio of silica to graphene in the filler is (1~2):1.

[0017] As a preferred embodiment of the present invention, the silica is amino-modified dendritic mesoporous silica with a specific surface area of ​​150~250 m². 2 / g, with an average pore size of 10~50nm.

[0018] As a preferred embodiment of the present invention, the graphene is fluorinated graphene with a fluorine content ≥60% and a particle size D. 50 Its diameter is 5~10μm, and its specific surface area is 200~300m². 2 / g, tap density is 0.1~0.2g / cm³ 3 .

[0019] The filler of the present invention preferably uses amino-modified dendritic mesoporous silica and fluorinated graphene in combination. The former has a dendritic pore structure and the connectivity between the pores is more complex and abundant, while the latter maintains the high strength performance of graphene and brings low surface energy due to the introduction of fluorine atoms. By controlling the mass ratio of the two, a good compounding effect is achieved, which significantly improves the overall performance of the material.

[0020] As a preferred embodiment of the present invention, the dispersant of component A in step S2 is selected from one or more of BYK-110, BYK-9076, and BYK-9010.

[0021] As a preferred embodiment of the present invention, the defoamer of component A in step S2 is BYK141 from BYK Chemical.

[0022] As a preferred embodiment of the present invention, the curing agent of component B in step S2 is selected from one or more of m-phenylenediamine, phenylenediamine, or 3,4'-diaminodiphenylmethane.

[0023] As a preferred technical solution of the present invention, the heating and curing conditions in step S3 are: curing at 180~200℃ for 1~2 hours.

[0024] A second aspect of the present invention provides an organosilicon high-temperature resistant and corrosion-resistant coating composition as described in the first aspect.

[0025] Compared with the prior art, the present invention has the following beneficial effects: (1) The eugenol epoxy silicone resin of the present invention can combine with the amino group of dendritic mesoporous silica during the curing process to achieve chemical bonding between inorganic silica and silicone resin, eliminate interface defects and greatly improve crosslinking density. Combined with the “sheet-sphere synergistic” structure formed by fluorinated graphene and mesoporous silica in space, the heat resistance and salt spray resistance of the anti-corrosion coating can be effectively improved through the synergistic effect of multiple components.

[0026] (2) The benzene ring structure in the eugenol epoxy silicone resin of the present invention has extremely high bond energy and rigidity. Under high temperature environment, the aromatic ring can effectively restrict the thermal movement of polymer chain segments as a heat-resistant skeleton. Combined with the high thermal stability of silicon-oxygen bonds, it significantly improves the heat resistance of anti-corrosion coatings. On the other hand, the eugenol epoxy intermediate is grafted onto the long chain of siloxane through free radical copolymerization to form a rigid-flexible interpenetrating network structure. The rigid benzene ring fills between the flexible siloxane chains, which greatly reduces the free volume, making it difficult for corrosive media to find a penetration channel, thereby achieving good salt spray resistance.

[0027] (3) The three-dimensional porous amino-modified dendritic mesoporous silica in the compound filler of the present invention can fill the two-dimensional interlayer gaps of fluorinated graphene, forming a particle-layer interlocking network, effectively inhibiting the thermal motion and degradation of organosilicon chains, and providing good heat resistance for anti-corrosion coatings; at the same time, the amino-modified dendritic mesoporous silica can effectively extend the diffusion path of corrosive media and play a physical shielding role due to its dendritic structure; the CF bond of fluorinated graphene endows the coating with excellent acid and alkali resistance and chemical resistance through extremely high bond energy, and the two work together to improve the salt spray resistance of the material. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram illustrating the preparation of the eugenol epoxy intermediate in Example 1 of the present invention.

[0030] Figure 2 This is a schematic diagram illustrating the preparation of eugenol epoxy silicone resin in Example 1 of the present invention.

[0031] Figure 3 The image shows the FTIR spectra of the eugenol epoxy silicone resin and the eugenol epoxy intermediate in Example 1 of this invention. Detailed Implementation

[0032] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0033] The sources of some components in the examples and comparative examples are as follows: Eugenol, CAS No. 579-60-2, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Epichlorohydrin, CAS No. 106-89-8, was purchased from Sinopharm Chemical Reagent Co., Ltd. Tetra-n-butylammonium bromide, CAS No. 1643-19-2, was purchased from Sinopharm Chemical Reagent Co., Ltd. Methacryloxypropyltris(trimethylsiloxane)silane, CAS No. 17096-07-0, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. Azobisisobutyronitrile, CAS No. 78-67-1, purchased from Sinopharm Chemical Reagent Co., Ltd. Commercially available silicone resin, product number SH-1041, was purchased from Hubei Longsheng Sihai New Materials Co., Ltd. Amino-modified dendritic mesoporous silica, product number 103699, with a specific surface area of ​​205 m². 2 / g, with an average pore size of 13nm, purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd.; Fluorinated graphene, catalog number 302105, fluorine content 64%, particle size D 50 It has a thickness of 7 μm and a specific surface area of ​​250 m². 2 / g, tap density is 0.15g / cm³ 3 Purchased from Xiamen Zhongke Xifu Technology Co., Ltd. Ordinary silica powder, item number S433669, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. Ordinary graphene powder, item number G476622, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd. m-Phenylenediamine, CAS No. 108-45-2, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. m-Phenylenediamine, CAS No. 1477-55-0, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd. 3,4'-Diaminodiphenylmethane, CAS No. 19430-83-2, was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0034] Example 1 This embodiment provides a method for preparing an organosilicon high-temperature resistant and anti-corrosion coating composition, including the following steps: S1. By weight, 40 parts of eugenol and 60 parts of epichlorohydrin are mixed, then 2 parts of tetra-n-butylammonium bromide are added and the mixture is heated to 100℃ and reacted for 6 hours. The mixture is then cooled to 65℃ and 60 parts of a 30% sodium hydroxide solution are added and kept at this temperature for 6 hours. After washing with water and drying, the eugenol epoxy intermediate is obtained (see schematic diagram for preparation). Figure 1As shown, eugenol and epichlorohydrin undergo an etherification reaction to obtain an eugenol epoxy intermediate; 70 parts of methacryloyloxypropyltris(trimethylsiloxane)silane, 30 parts of the eugenol epoxy intermediate, and 1.6 parts of azobisisobutyronitrile are added to 120 parts of xylene and sonicated for 60 min, then heated to 90℃ and reacted for 24 h. The mixture is then rotary evaporated and dried to obtain eugenol epoxy silicone resin (preparation schematic diagram shown). Figure 2 (As shown); Infrared spectra of eugenol epoxy intermediate and eugenol epoxy silicone resin are shown below. Figure 3 As shown.

[0035] S2. Add 90 parts of eugenol epoxy silicone resin, 30 parts of filler (20 parts of amino-modified dendritic mesoporous silica and 10 parts of fluorinated graphene), 3 parts of dispersant BYK-110, and 0.4 parts of defoamer BYK141 to 40 parts of solvent xylene and stir evenly to obtain component A. Mix 6 parts of curing agent m-phenylenediamine and 6 parts of cyclohexanone to obtain component B.

[0036] S3. Mix 100 parts of component A and 12 parts of component B, spray the mixture, and cure it at 200°C for 1 hour to obtain a silicone high-temperature resistant anti-corrosion coating composition.

[0037] Example 2 This embodiment provides a method for preparing an organosilicon high-temperature resistant and anti-corrosion coating composition, including the following steps: S1. By weight, 30 parts of eugenol and 50 parts of epichlorohydrin were mixed, and then 1 part of tetra-n-butylammonium bromide was added. The mixture was heated to 90°C and reacted for 8 hours. Then, the mixture was cooled to 55°C and 50 parts of sodium hydroxide solution with a mass concentration of 30% were added and kept at this temperature for 6 hours. The mixture was washed with water and dried to obtain eugenol epoxy intermediate. 60 parts of methacryloyloxypropyltris(trimethylsiloxane)silane, 20 parts of eugenol epoxy intermediate and 1.4 parts of azobisisobutyronitrile were added to 100 parts of xylene and sonicated for 60 minutes. Then, the mixture was heated to 80°C and reacted for 30 hours. The mixture was rotary evaporated and dried to obtain eugenol epoxy silicone resin.

[0038] S2. Add 80 parts of eugenol epoxy silicone resin, 20 parts of filler (10 parts of amino-modified dendritic mesoporous silica and 10 parts of fluorinated graphene), 1 part of dispersant BYK-9076, and 0.2 parts of defoamer BYK141 to 30 parts of solvent butyl acetate and stir evenly to obtain component A. Mix 4 parts of curing agent phenylenediamine and 4 parts of cyclohexanone to obtain component B.

[0039] S3. Mix 90 parts of component A and 8 parts of component B, spray the mixture, and cure it at 180°C for 2 hours to obtain a silicone high-temperature resistant anti-corrosion coating composition.

[0040] Example 3 This embodiment provides a method for preparing an organosilicon high-temperature resistant and anti-corrosion coating composition, including the following steps: S1. By weight, 35 parts of eugenol and 55 parts of epichlorohydrin were mixed, and then 1.6 parts of tetra-n-butylammonium bromide were added. The mixture was heated to 96°C and reacted for 7 hours. Then the temperature was lowered to 58°C and 55 parts of 30% sodium hydroxide solution were added and kept at this temperature for 7 hours. The mixture was washed with water and dried to obtain eugenol epoxy intermediate. 65 parts of methacryloyloxypropyltris(trimethylsiloxane)silane, 24 parts of eugenol epoxy intermediate and 1.5 parts of azobisisobutyronitrile were added to 110 parts of xylene and sonicated for 55 minutes. Then the mixture was heated to 85°C and reacted for 26 hours. The mixture was rotary evaporated and dried to obtain eugenol epoxy silicone resin.

[0041] S2. Add 85 parts of eugenol epoxy silicone resin, 25 parts of filler (15 parts of amino-modified dendritic mesoporous silica and 10 parts of fluorinated graphene), 2 parts of dispersant BYK-9010, and 0.3 parts of defoamer BYK141 to 35 parts of solvent xylene and stir evenly to obtain component A. Mix 5 parts of curing agent 3,4'-diaminodiphenylmethane and 5 parts of cyclohexanone to obtain component B.

[0042] S3. Mix 95 parts of component A and 10 parts of component B, spray the mixture, and cure it at 195°C for 1.5 hours to obtain a silicone high-temperature resistant anti-corrosion coating composition.

[0043] Comparative Example 1 The difference between this comparative example and Example 1 is that commercially available silicone resin (item number SH-1041) is used in component A instead of eugenol epoxy silicone resin.

[0044] Comparative Example 2 The difference between this comparative example and Example 1 is that the filler in component A is replaced with 30 parts of amino-modified dendritic mesoporous silica.

[0045] Comparative Example 3 The difference between this comparative example and Example 1 is that the filler in component A is replaced with 30 parts of fluorinated graphene.

[0046] Comparative Example 4 The difference between this comparative example and Example 1 is that the filler in component A is replaced with 20 parts of ordinary silica powder (item number S433669) and 10 parts of fluorinated graphene.

[0047] Comparative Example 5 The difference between this comparative example and Example 1 is that the filler in component A is replaced with 20 parts of amino-modified dendritic mesoporous silica and 10 parts of ordinary graphene powder (item number G476622).

[0048] The properties of the coating compositions provided in the above embodiments and comparative examples were tested using the following methods: (1) Pencil hardness: The test was conducted in accordance with the requirements of GB / T 6739-2022 Determination of paint film hardness by pencil method for paints and varnishes.

[0049] (2) Adhesion: The adhesion was tested in accordance with the requirements of GB / T 9286-2021 Paints and Varnishes Cross-cut Test.

[0050] (3) Heat resistance: The test was conducted in accordance with the requirements of GB / T 1735-2009 Determination of heat resistance of paints and varnishes. The substrate was steel plate, the coating thickness was 400μm, the heating temperature was 500℃, and the longest time that the coating layer remained without peeling or cracking was determined.

[0051] (4) Salt spray resistance: The test shall be conducted in accordance with the requirements of GB / T 31588.1-2015 Determination of resistance to cyclic corrosion environments of paints and varnishes - Part 1: wet (salt spray) / dry / moisture.

[0052] The performance test data above are shown in Table 1.

[0053] Table 1 Performance Test Results ; As can be seen from the above, the present invention first prepares an eugenol epoxy intermediate using eugenol and epichlorohydrin as raw materials, then polymerizes the eugenol epoxy intermediate with methacryloyloxypropyltris(trimethylsiloxane)silane to obtain eugenol epoxy silicone resin, then adds the eugenol epoxy silicone resin, filler, dispersant and defoamer to a solvent and stirs evenly to obtain component A, then mixes the curing agent and cyclohexanone to obtain component B, finally mixes component A and component B, sprays the mixture, heats and cures it to obtain a silicone high-temperature resistant anti-corrosion coating composition (Examples 1 to 3), which has better overall performance.

[0054] Compared to Example 1, component A uses commercially available silicone resin (item number SH-1041) instead of eugenol epoxy silicone resin. The lack of eugenol epoxy silicone resin results in poorer heat resistance and salt spray resistance (Comparative Example 1). Compared to Example 1, component A uses 30 parts of amino-modified dendritic mesoporous silica as filler. The lack of fluorinated graphene further worsens heat resistance and salt spray resistance (Comparative Example 2). Compared to Example 1, the filler in component A was changed to 30 parts of fluorinated graphene, lacking the compound of fluorinated amino-modified dendritic mesoporous silica, resulting in poorer heat resistance and salt spray resistance (Comparative Example 3); compared to Example 1, the filler in component A was changed to 20 parts of ordinary silica powder (item number S433669) and 10 parts of fluorinated graphene, lacking the effect of amino-modified dendritic mesoporous silica, resulting in poorer heat resistance and salt spray resistance (Comparative Example 4); compared to Example 1, the filler in component A was changed to 20 parts of amino-modified dendritic mesoporous silica and 10 parts of ordinary graphene powder (item number G476622), lacking the effect of fluorinated graphene, resulting in poorer heat resistance and salt spray resistance (Comparative Example 5).

Claims

1. A method for preparing an organosilicon high-temperature resistant anti-corrosion coating composition, characterized in that, Includes the following steps: S1. Eugenol epoxy intermediate is first prepared using eugenol and epichlorohydrin as raw materials. Then, the eugenol epoxy intermediate and methacryloyloxypropyltris(trimethylsiloxane)silane are polymerized to obtain eugenol epoxy silicone resin. S2. Add the eugenol epoxy silicone resin, filler, dispersant and defoamer to the solvent and stir evenly to obtain component A. Mix the curing agent and cyclohexanone to obtain component B. S3. Mix the component A and the component B, spray the mixture, and heat to cure it to obtain a silicone high-temperature resistant and anti-corrosion coating composition. In step S2, the filler for component A is silicon dioxide and graphene. The mass ratio of silica to graphene in the filler is (1~2):1; The silica is amino-modified dendritic mesoporous silica with a specific surface area of ​​150~250 m². 2 / g, with an average pore size of 10~50nm; The graphene is fluorinated graphene with a fluorine content ≥60%, a particle size D50 of 5~10μm, and a specific surface area of ​​200~300m². 2 / g, tap density is 0.1~0.2g / cm³ 3 .

2. The method for preparing an organosilicon high-temperature resistant anti-corrosion coating composition according to claim 1, characterized in that, In step S2, component A comprises, by weight: 80-90 parts eugenol epoxy silicone resin, 20-30 parts filler, 1-3 parts dispersant, 0.2-0.4 parts defoamer, and 30-40 parts solvent; In step S2, component B includes, by weight: 4-6 parts curing agent and 4-6 parts cyclohexanone; In step S3, the components are in parts by weight: 90-100 parts of component A and 8-12 parts of component B.

3. The method for preparing an organosilicon high-temperature resistant anti-corrosion coating composition according to claim 1, characterized in that, The preparation steps of the eugenol epoxy intermediate in step S1 are as follows: 30-40 parts by weight of eugenol and 50-60 parts by weight of epichlorohydrin are mixed, then 1-2 parts by weight of tetra-n-butylammonium bromide are added and the mixture is heated to 90-100℃ for 6-8 hours. The mixture is then cooled to 55-65℃ and 50-60 parts by weight of 30% sodium hydroxide solution are added and kept at this temperature for 6-8 hours. The mixture is then washed with water and dried to obtain the eugenol epoxy intermediate.

4. The method for preparing an organosilicon high-temperature resistant anti-corrosion coating composition according to claim 1, characterized in that, The polymerization reaction described in step S1 is as follows: by weight, 60-70 parts of methacryloyloxypropyltris(trimethylsiloxane), 20-30 parts of eugenol epoxy intermediate and 1.4-1.6 parts of azobisisobutyronitrile are added to 100-120 parts of xylene and sonicated for 50-60 min. Then the temperature is raised to 80-90℃ and reacted for 24-30 h. The mixture is then rotary evaporated and dried to obtain eugenol epoxy silicone resin.

5. The method for preparing an organosilicon high-temperature resistant anti-corrosion coating composition according to claim 1, characterized in that, In step S2, the curing agent of component B is selected from one or more of m-phenylenediamine, phenylenediamine, or 3,4'-diaminodiphenylmethane.

6. A silicone high-temperature resistant anti-corrosion coating composition, characterized in that, It is prepared by the preparation method according to any one of claims 1 to 5.

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