Preparation method of graphene self-cleaning alkyd anticorrosive paint

Abstract

The invention discloses a preparation method of graphene self-cleaning alkyd anticorrosive paint, and relates to the technical field of paint. The preparation method comprises the following steps: reacting alkyd resin with fluorine-containing diamine under the action of a condensing agent and an activating agent to obtain modified alkyd resin; the preparation method comprises the following steps: ultrasonically stirring and dispersing graphene and a silane coupling agent in ethanol to obtain a graphene dispersion liquid; and adding the graphene dispersion liquid and an auxiliary agent into the modified alkyd resin, and uniformly dispersing to obtain the graphene self-cleaning alkyd anticorrosive paint. The coating is good in self-cleaning effect and excellent in corrosion resistance, and has wide application value.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to a method for preparing a graphene self-cleaning alkyd anti-corrosion coating. Background Art

[0002] With the rapid development of industrialization and urbanization, the corrosion problem of industrial materials is becoming increasingly serious, especially in harsh environments such as marine, chemical, and bridge environments. Corrosion not only shortens the service life of materials but also causes huge economic losses and safety hazards. Therefore, the development of efficient and durable anti-corrosion coatings has become an important research direction in the field of materials science.

[0003] Alkyd resin coatings are widely used in corrosion protection due to their excellent adhesion, weather resistance, and cost-effectiveness. However, traditional alkyd resin coatings still suffer from insufficient corrosion protection and poor self-cleaning ability when exposed to harsh environments for a long time, limiting their application in demanding applications. Therefore, most commonly used alkyd anti-corrosion coatings today involve modification or other further treatment of the alkyd resin.

[0004] Graphene, an emerging functional nanomaterial, has been extensively researched in the field of anti-corrosion coatings due to its excellent properties. It can be used to enhance the overall performance of alkyd resin anti-corrosion coatings. However, due to graphene agglomeration and cost issues, the addition of graphene to alkyd resin anti-corrosion coatings generally does not exceed 2%, far lower than the typical addition of alkyd resin, which exceeds 50%. Furthermore, while conventional graphene alkyd resin anti-corrosion coatings exhibit a certain degree of hydrophobicity, they lack the ability to achieve a self-cleaning effect. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this application provides a method for preparing a graphene self-cleaning alkyd anti-corrosion coating. The method comprises reacting an alkyd resin with a fluorinated diamine in the presence of a condensing agent and an activator to produce a modified alkyd resin. Graphene and a silane coupling agent are then ultrasonically dispersed in ethanol to produce a graphene dispersion. The graphene dispersion and an additive are then added to the modified alkyd resin and uniformly dispersed to produce the graphene self-cleaning alkyd anti-corrosion coating. This coating exhibits excellent self-cleaning and anti-corrosion properties, is simple to prepare, and has broad application potential.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] A method for preparing a graphene self-cleaning alkyd anti-corrosion coating, comprising:

[0008] adding an alkyd resin to an organic solvent, stirring at a first set temperature for a first set time to dissolve the alkyd resin, thereby obtaining an alkyd resin solution;

[0009] adding a fluorinated diamine, a condensing agent, and an activator to an alkyd resin solution, heating the solution to a second set temperature under nitrogen protection, and reacting the solution for a second set time to obtain a modified alkyd resin;

[0010] ultrasonically stirring the graphene and the silane coupling agent in ethanol for a third set time to obtain a graphene dispersion;

[0011] Graphene dispersion and additives are added to the modified alkyd resin, and ultrasonic stirring is performed for a fourth set time to prepare the graphene self-cleaning alkyd anti-corrosion coating.

[0012] Beneficial technical effects:

[0013] The graphene self-cleaning alkyd anticorrosive coating provided by the application is on the one hand connected to the alkyd resin by chemical bond by the reaction between the amino group in the fluorinated diamine and the carboxyl group in the alkyd resin, and a modified alkyd resin is obtained. The presence of fluorinated groups greatly reduces the surface energy of the modified alkyd resin, and the modified alkyd resin is the main component of the prepared coating, thereby significantly improving the corrosion resistance and hydrophobicity of the prepared coating, and can achieve self-cleaning, solving the problem that the graphene alkyd anticorrosive coating of the prior art cannot achieve self-cleaning. On the other hand, by the modification of silane coupling agent, the graphene surface forms a layer of organic molecular layer, increases the steric hindrance between the graphene sheets, prevents its reunion, thereby improving the dispersibility and bonding force of graphene in the modified alkyd resin. The two aspects are combined, and graphene is evenly dispersed in the modified alkyd resin matrix to form a dense physical barrier layer, thereby effectively blocking the penetration of corrosive media such as oxygen and chloride ions, and the final coating anticorrosive and self-cleaning properties are fully improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the reaction for preparing modified alkyd resin.

[0015] Figure 2 It is a schematic diagram of the process of graphene self-cleaning alkyd anti-corrosion coating. DETAILED DESCRIPTION

[0016] In order to make the content of this application easier to understand, the technical solutions described in this application are further described below in conjunction with specific embodiments, but this application is not limited to these. Any equivalent transformation or simple replacement made based on the substantive content of this application should fall within the scope of protection of this application.

[0017] As used in this application, the singular forms "for," "or," "an," "any," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0018] This application adopts Figure 2 The technical solutions shown are as follows:

[0019] A method for preparing a graphene self-cleaning alkyd anti-corrosion coating, comprising:

[0020] adding an alkyd resin to an organic solvent, stirring at a first set temperature for a first set time to dissolve the alkyd resin, thereby obtaining an alkyd resin solution;

[0021] Add the fluorinated diamine, condensing agent and activator to the alkyd resin solution, heat it to the second set temperature under nitrogen protection, and react for the second set time to obtain a modified alkyd resin; the reaction diagram for preparing the modified alkyd resin is as shown in Figure 1 As shown;

[0022] ultrasonically stirring the graphene and the silane coupling agent in ethanol for a third set time to obtain a graphene dispersion;

[0023] Graphene dispersion and additives are added to the modified alkyd resin, and ultrasonic stirring is performed for a fourth set time to prepare the graphene self-cleaning alkyd anti-corrosion coating.

[0024] In one possible implementation, the structure of the alkyd resin includes:

[0025]

[0026] Here, n is an integer between 5 and 30, and R is an alkyl or alkenyl group having 8 to 16 carbon atoms.

[0027] In a possible implementation, the organic solvent includes any one of toluene and xylene.

[0028] In a possible implementation, the fluorine-containing diamine is 4,4-(hexafluoroisopropyl)bis(p-phenoxy)diphenylamine.

[0029] In a possible implementation, the condensing agent includes any one of dicyclohexylcarbodiimide and diisopropylcarbodiimide; and the activating agent is 4-dimethylaminopyridine.

[0030] In one possible implementation, the structure of the modified alkyd resin includes:

[0031]

[0032] Here, n is an integer between 5 and 30, and R is an alkyl or alkenyl group having 8 to 16 carbon atoms.

[0033] In a possible implementation, the silane coupling agent includes any one of KH550, APTES, and GPTMS.

[0034] In a possible implementation, the auxiliary agent includes a pigment, a filler, and a leveling agent.

[0035] In a possible implementation, the pigment includes any one of titanium dioxide, carbon black, red iron oxide, and yellow iron oxide.

[0036] In a possible implementation, the filler includes any one of nano-silicon dioxide and nano-titanium dioxide.

[0037] In a possible implementation, the leveling agent is an acrylate leveling agent.

[0038] In a possible implementation, the mass ratio of the alkyd resin, the organic solvent, the fluorinated diamine, the condensing agent, and the activator is (50-70): (20-40): (5-15): (1-5): (1-2).

[0039] In a possible implementation, the mass ratio of the graphene, the silane coupling agent and the ethanol is (1-5): (1-10): (85-90).

[0040] In a possible implementation, the mass ratio of the modified alkyd resin, graphene dispersion, pigment, filler and leveling agent is (40-60): (10-25): (10-20): (5-15): (1-3).

[0041] In a possible implementation, the first set temperature is 80-100°C, and the second set temperature is 120-150°C.

[0042] In a possible implementation, the first set time is 1 to 2 hours, the second set time is 3 to 5 hours, the third set time is 30 to 60 minutes, and the fourth set time is 1 to 2 hours.

[0043] The following will describe in detail a method for preparing a graphene self-cleaning alkyd anti-corrosion coating provided by the present application in combination with different embodiments.

[0044] Example 1:

[0045] like Figure 2 As shown, a method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0046] 1. Add 60g of alkyd resin to 30g of toluene and stir at 90°C for 1.5h to dissolve to obtain an alkyd resin solution;

[0047] 2. Add 7 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 2 g of dicyclohexylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 130°C under nitrogen protection, and react for 4 hours to obtain a modified alkyd resin;

[0048] 3. Ultrasonic stirring of 3 g of graphene and 7 g of KH550 in 90 g of ethanol for 45 min was performed to obtain a graphene dispersion;

[0049] 4. Add 20 g of graphene dispersion, 15 g of titanium dioxide, 10 g of nano-silica and 5 g of acrylic leveling agent to 50 g of modified alkyd resin and stir ultrasonically for 1.5 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0050] Example 2:

[0051] like Figure 2 As shown, a method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0052] 1. Add 55g of alkyd resin to 35g of xylene and stir at 80°C for 2h to dissolve to obtain an alkyd resin solution;

[0053] 2. Add 5 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 3 g of diisopropylcarbodiimide and 2 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 120°C under nitrogen protection, and react for 5 hours to obtain a modified alkyd resin;

[0054] 3. 2 g of graphene and 8 g of APTES were ultrasonically stirred in 90 g of ethanol for 60 min to obtain a graphene dispersion;

[0055] 4. Add 25 g of graphene dispersion, 20 g of carbon black, 5 g of nano-titanium dioxide and 5 g of acrylic leveling agent to 45 g of modified alkyd resin, and stir ultrasonically for 2 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0056] Example 3:

[0057] like Figure 2 As shown, a method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0058] 1. Add 70g of alkyd resin to 20g of toluene and stir at 100°C for 1h to dissolve to obtain an alkyd resin solution;

[0059] 2. Add 6 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 3 g of dicyclohexylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 150°C under nitrogen protection, and react for 3 hours to obtain a modified alkyd resin;

[0060] 3. 4 g of graphene and 6 g of GPTMS were ultrasonically stirred in 90 g of ethanol for 30 min to obtain a graphene dispersion;

[0061] 4. Add 15 g of graphene dispersion, 10 g of red iron oxide, 10 g of nano-silica and 5 g of acrylic leveling agent to 60 g of modified alkyd resin and stir ultrasonically for 1 hour to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0062] Example 4:

[0063] like Figure 2 As shown, a method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0064] 1. Add 50g of alkyd resin to 40g of xylene and stir at 85°C for 2h to dissolve to obtain an alkyd resin solution;

[0065] 2. Add 5 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 3 g of diisopropylcarbodiimide and 2 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 140°C under nitrogen protection, and react for 4.5 hours to obtain a modified alkyd resin;

[0066] 3. Ultrasonic stirring of 3 g of graphene and 7 g of KH550 in 90 g of ethanol for 50 min to obtain a graphene dispersion;

[0067] 4. Add 20 g of graphene dispersion, 15 g of iron oxide yellow, 10 g of nano-titanium dioxide and 5 g of acrylic leveling agent to 50 g of modified alkyd resin and stir ultrasonically for 2 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0068] Example 5:

[0069] like Figure 2 As shown, a method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0070] 1. Add 65g of alkyd resin to 25g of toluene and stir at 95°C for 1h to dissolve to obtain an alkyd resin solution;

[0071] 2. Add 6 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 3 g of dicyclohexylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 125°C under nitrogen protection, and react for 3.5 hours to obtain a modified alkyd resin;

[0072] 3. Ultrasonic stirring of 5 g of graphene and 5 g of APTES in 90 g of ethanol for 40 min to obtain a graphene dispersion;

[0073] 4. Add 20 g of graphene dispersion, 15 g of titanium dioxide, 5 g of nano-silica and 5 g of acrylic leveling agent to 55 g of modified alkyd resin and stir ultrasonically for 1 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0074] Example 6:

[0075] like Figure 2 As shown, a method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0076] 1. Add 58g of alkyd resin to 32g of xylene and stir at 88°C for 1.5h to dissolve to obtain an alkyd resin solution;

[0077] 2. Add 6 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 3 g of diisopropylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 135°C under nitrogen protection, and react for 4.5 hours to obtain a modified alkyd resin;

[0078] 3. 4 g of graphene and 6 g of GPTMS were ultrasonically stirred in 90 g of ethanol for 55 min to obtain a graphene dispersion;

[0079] 4. Add 25 g of graphene dispersion, 15 g of carbon black, 5 g of nano-titanium dioxide and 5 g of acrylic leveling agent to 50 g of modified alkyd resin, and stir ultrasonically for 1.5 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0080] Comparative Example 1:

[0081] A method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0082] 1. Add 60g of alkyd resin to 30g of toluene and stir at 90°C for 1.5h to dissolve to obtain an alkyd resin solution;

[0083] 2. Add 7 g of 2,2'-bis[4-(4-aminophenoxyphenyl)]propane, 2 g of dicyclohexylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 130°C under nitrogen protection, and react for 4 hours to obtain a modified alkyd resin;

[0084] 3. Ultrasonic stirring of 3 g of graphene and 7 g of KH550 in 90 g of ethanol for 45 min was performed to obtain a graphene dispersion;

[0085] 4. Add 20 g of graphene dispersion, 15 g of titanium dioxide, 10 g of nano-silica and 5 g of acrylic leveling agent to 50 g of modified alkyd resin and stir ultrasonically for 1.5 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0086] Comparative Example 2:

[0087] A method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0088] 1. Add 70g of alkyd resin to 20g of toluene and stir at 100°C for 1h to dissolve to obtain an alkyd resin solution;

[0089] 2. Add 6 g of 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine, 3 g of dicyclohexylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 150°C under nitrogen protection, and react for 3 hours to obtain a modified alkyd resin;

[0090] 3. Ultrasonic stirring of 4 g of graphene in 96 g of ethanol for 30 min to obtain a graphene dispersion;

[0091] 4. Add 15 g of graphene dispersion, 10 g of red iron oxide, 10 g of nano-silica and 5 g of acrylic leveling agent to 60 g of modified alkyd resin and stir ultrasonically for 1 hour to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0092] Comparative Example 3:

[0093] A method for preparing a graphene self-cleaning alkyd anti-corrosion coating comprises the following steps:

[0094] 1. Add 58g of alkyd resin to 32g of xylene and stir at 88°C for 1.5h to dissolve to obtain an alkyd resin solution;

[0095] 2. Add 6 g of 2,2'-bis[4-(4-aminophenoxyphenyl)]propane, 3 g of diisopropylcarbodiimide and 1 g of 4-dimethylaminopyridine to the alkyd resin solution, heat to 135°C under nitrogen protection, and react for 4.5 hours to obtain a modified alkyd resin;

[0096] 3. Ultrasonic stirring of 4 g of graphene in 96 g of ethanol for 55 min to obtain a graphene dispersion;

[0097] 4. Add 25 g of graphene dispersion, 15 g of carbon black, 5 g of nano-titanium dioxide and 5 g of acrylic leveling agent to 50 g of modified alkyd resin, and stir ultrasonically for 1.5 h to obtain a graphene self-cleaning alkyd anti-corrosion coating.

[0098] The self-cleaning and anti-corrosion performance tests were performed on the graphene self-cleaning alkyd anti-corrosion coatings prepared in Examples 1 to 6 and Comparative Examples 1 to 3.

[0099] According to GB / T 1410-2006, the surface resistivity of the prepared graphene self-cleaning alkyd anti-corrosion coating was tested, and the anti-corrosion performance of the prepared graphene self-cleaning alkyd anti-corrosion coating was evaluated based on the size of the surface resistivity.

[0100] The self-cleaning performance of the prepared graphene self-cleaning alkyd anti-corrosion coating was evaluated based on the measured contact angle.

[0101] The test results of the above tests are shown in Table 1.

[0102] Table 1 Test results of graphene self-cleaning alkyd anticorrosive coatings prepared in Examples and Comparative Examples

[0103] Surface resistivity (Ω) Contact angle (°) Example 1 <![CDATA[10 9 ]]> 156 Example 2 <![CDATA[10 8 ]]> 151 Example 3 <![CDATA[10 8 ]]> 153 Example 4 <![CDATA[10 8 ]]> 152 Example 5 <![CDATA[10 9 ]]> 154 Example 6 <![CDATA[10 9 ]]> 153 Comparative Example 1 <![CDATA[10 5 ]]> 123 Comparative Example 2 <![CDATA[10 6 ]]> 131 Comparative Example 3 <![CDATA[10 4 ]]> 116

[0104] As can be seen from Table 1, the surface resistivity and contact angle of Examples 1-6 are generally higher than those of Comparative Examples 1-3.

[0105] The main reason is that in the graphene self-cleaning alkyd anti-corrosion coatings prepared in Examples 1 to 6, the fluorinated diamine is chemically bonded to the alkyd resin through the reaction between the amino group in the fluorinated diamine and the carboxyl group in the alkyd resin, thereby obtaining a modified alkyd resin. The presence of the fluorinated group greatly reduces the surface energy of the modified alkyd resin, and the modified alkyd resin is the main component of the prepared coating, thereby significantly improving the corrosion resistance and hydrophobicity of the prepared coating and achieving self-cleaning. In addition, through the modification of the silane coupling agent, a layer of organic molecules is formed on the surface of the graphene, which increases the steric hindrance between the graphene sheets and prevents them from agglomerating, thereby improving the dispersibility and binding force of the graphene in the modified alkyd resin. The graphene is evenly dispersed in the modified alkyd resin matrix, forming a dense physical barrier layer, thereby effectively blocking the penetration of corrosive media such as oxygen and chloride ions, and fully improving the corrosion resistance and self-cleaning properties of the prepared coating.

[0106] In contrast, although a modified alkyd resin can also be prepared in Comparative Example 1, since 2,2'-bis[4-(4-aminophenoxyphenyl)]propane is used in Comparative Example 1 instead of 4,4-(hexafluoroisopropyl)bis(p-phenoxy)diphenylamine, the prepared modified alkyd resin does not contain a fluorine-containing group, and therefore the corrosion resistance and self-cleaning properties are not significantly improved.

[0107] Comparative Example 2 used 4,4-(hexafluoroisopropyl)bis(p-phenoxy)diphenylamine, resulting in a modified alkyd resin containing fluorinated groups, which improved its corrosion resistance and self-cleaning properties. However, in Comparative Example 2, no silane coupling agent was used in the preparation of the graphene dispersion; as a result, the graphene's dispersibility and binding strength in the modified alkyd resin were reduced, making it difficult to form a dense physical barrier layer. Ultimately, the resulting coating failed to fully enhance its corrosion resistance and self-cleaning properties.

[0108] In Comparative Example 3, neither 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine was used nor a silane coupling agent was added, so the overall performance of the graphene self-cleaning alkyd anti-corrosion coating obtained was the worst.

[0109] The above results show and describe the basic principles and main features of this application as well as the advantages of this application.

[0110] Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. Such changes and improvements are intended to fall within the scope of the present application. The scope of protection claimed in the present application is defined by the equivalents of the appended claims.

Claims

1. A method for preparing a graphene self-cleaning alkyd anti-corrosion coating, characterized in that: include: adding an alkyd resin to an organic solvent, stirring at a first set temperature for a first set time to dissolve the alkyd resin, thereby obtaining an alkyd resin solution; adding a fluorinated diamine, a condensing agent, and an activator to an alkyd resin solution, heating the solution to a second set temperature under nitrogen protection, and reacting the solution for a second set time to obtain a modified alkyd resin; ultrasonically stirring the graphene and the silane coupling agent in ethanol for a third set time to obtain a graphene dispersion; Graphene dispersion and additives are added to the modified alkyd resin, and ultrasonic stirring is performed for a fourth set time to prepare the graphene self-cleaning alkyd anti-corrosion coating.

2. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, wherein: The structure of the alkyd resin comprises: Here, n is an integer between 5 and 30, and R is an alkyl or alkenyl group having 8 to 16 carbon atoms.

3. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, wherein: The organic solvent includes any one of toluene and xylene.

4. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, wherein: The fluorine-containing diamine is 4,4-(hexafluoroisopropyl)bis(p-phenyloxy)diphenylamine.

5. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, wherein: The condensing agent includes any one of dicyclohexylcarbodiimide and diisopropylcarbodiimide; and the activating agent is 4-dimethylaminopyridine.

6. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, wherein: The structure of the modified alkyd resin comprises: Here, n is an integer between 5 and 30, and R is an alkyl or alkenyl group having 8 to 16 carbon atoms.

7. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, characterized in that: The silane coupling agent includes any one of KH550, APTES and GPTMS.

8. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, wherein: The auxiliary agents include pigments, fillers and leveling agents; the pigments include any one of titanium dioxide, carbon black, red iron oxide and yellow iron oxide; the fillers include any one of nano silicon dioxide and nano titanium dioxide; and the leveling agent is an acrylic leveling agent.

9. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 8, characterized in that: The mass ratio of the alkyd resin, organic solvent, fluorine-containing diamine, condensing agent and activator is (50-70): (20-40): (5-15): (1-5): (1-2); the mass ratio of the graphene, silane coupling agent and ethanol is (1-5): (1-10): (85-90); the mass ratio of the modified alkyd resin, graphene dispersion, pigment, filler and leveling agent is (40-60): (10-25): (10-20): (5-15): (1-3).

10. The method for preparing a graphene self-cleaning alkyd anti-corrosion coating according to claim 1, characterized in that: The first set temperature is 80-100° C., the second set temperature is 120-150° C.; the first set time is 1-2 hours, the second set time is 3-5 hours, the third set time is 30-60 minutes, and the fourth set time is 1-2 hours.

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