Static conductive polysiloxane coating, preparation method thereof and static conductive coating

Abstract

The invention discloses a static conductive polysiloxane coating and a preparation method and a static conductive coating thereof.The static conductive polysiloxane coating comprises a component A and a component B. The mass ratio of the component A to the component B is 9: 1-5: 1, and the component A comprises, by mass, 45-60 parts of epoxy polysiloxane resin, 0.5-5 parts of epoxy silane modified carbon nanotubes, 1.5-4 parts of auxiliaries, 20-35 parts of filler and 10-18 parts of solvent; and the component B is an amino silane coupling agent. According to the static conductive polysiloxane coating disclosed by the invention, the carbon nano tube is modified, so that the carbon nano tube is chemically grafted with epoxy silane to form a chemical bonding network, the dispersion stability of an inorganic filler is improved, the interface bonding force between the filler and resin is also enhanced, and a conductive network which is uniformly distributed can be formed; therefore, the antistatic capability and the protection performance of the coating are improved.

Description

Technical Field

[0001] This invention relates to the field of conductive coating technology, and in particular to a conductive polysiloxane coating, its preparation method, and a conductive coating layer. Background Technology

[0002] With the development of industrial technology, the demand for conductive coatings in petrochemical, electronic equipment, aerospace and other fields is increasing. Traditional conductive coatings typically achieve conductivity by physically blending conductive fillers (such as carbon black, metal powder or carbon nanotubes). However, this method has the following technical drawbacks: First, poor filler dispersion: conductive fillers (such as carbon nanotubes) tend to agglomerate in the resin matrix, resulting in uneven conductivity of the coating and even forming local insulating areas, affecting the conductive effect; second, weak interfacial bonding: traditional methods rely on physical adsorption or van der Waals forces, resulting in a lack of chemical bonding between the conductive filler and the resin matrix. During long-term use, the filler is prone to detachment due to mechanical stress, thermal cycling or chemical corrosion, leading to a decrease in the conductivity of the coating; third, insufficient weather resistance: the resin matrix of ordinary conductive coatings (such as epoxy resin, polyurethane) is prone to aging in high temperature, ultraviolet light or corrosive environments, leading to coating failure and shortening the protective life.

[0003] Existing technologies attempt to improve the compatibility between fillers and resins using silane coupling agents. For example, carbon nanotubes can be coated with silane coupling agents to enhance dispersibility. However, this method relies solely on physical adsorption and fails to form a stable chemically bonded network. Long-term use still results in filler migration and performance degradation. Furthermore, while coating carbon nanotubes with conductive polymers can improve dispersibility, the poor temperature resistance of conductive polymers limits the application environment of the coatings. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a conductive polysiloxane coating, its preparation method, and a conductive coating layer.

[0006] In a first aspect, the present invention provides a conductive polysiloxane coating comprising component A and component B in a mass ratio of 9:1 to 5:1.

[0007] in,

[0008] By weight, component A comprises 45-60 parts epoxy-based polysiloxane resin, 0.5-5 parts epoxy-based silane-modified carbon nanotubes, 1.5-4 parts additives, 20-35 parts filler, and 10-18 parts solvent.

[0009] Component B is an aminosilane coupling agent.

[0010] Further, the preparation of the epoxy-silane modified carbon nanotubes includes:

[0011] Hydroxyl groups are introduced into carbon nanotubes after acid oxidation;

[0012] Under acidic conditions, γ-glycidoxypropyltrimethoxysilane was added and reacted to obtain the epoxysilane-modified carbon nanotubes.

[0013] Furthermore, the oxidant for acid oxidation includes a mixture of concentrated sulfuric acid and concentrated nitric acid, and the acidic conditions are provided by dilute hydrochloric acid.

[0014] Furthermore, the aminosilane coupling agent includes one or both of γ-aminopropyltriethoxysilane and γ-aminopropyltrimethoxysilane.

[0015] Furthermore, the solvent includes one or more of xylene, methyl ethyl ketone, and anhydrous ethanol.

[0016] Furthermore, the additives include one or more of the following: leveling agents, thixotropic agents, anti-settling agents, defoamers, and dispersants.

[0017] Furthermore, the filler includes one or more of the following: rust-preventive filler, corrosion-resistant filler, flake filler, and pigment.

[0018] Secondly, the present invention provides a method for preparing the conductive polysiloxane coating mentioned in the first aspect, comprising the following steps:

[0019] (1) Dissolve epoxy-based polysiloxane resin in a solvent to form a resin solution;

[0020] (2) Epoxysilane-modified carbon nanotubes are dispersed in a solvent, ultrasonicated, and then added to the resin solution, along with additives and fillers, and dispersed at high speed.

[0021] (3) Grind the high-speed dispersed material, discharge it, and filter it to obtain component A;

[0022] (4) Add component B to component A and stir evenly to obtain a conductive polysiloxane coating.

[0023] Furthermore, in step (3), the material is ground until the fineness is below 30 μm.

[0024] Thirdly, the present invention proposes to form a conductive coating by spraying a conductive polysiloxane coating prepared by the method proposed in the first aspect above or the method proposed in the second aspect above.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] The conductive polysiloxane coating of the present invention modifies carbon nanotubes to chemically graft epoxy silanes, forming a chemically bonded network. This improves the dispersion stability of inorganic fillers, enhances the interfacial bonding between fillers and resins, and forms a uniformly distributed conductive network, thereby improving the antistatic ability and protective performance of the coating.

[0027] The present invention grafts hydroxyl groups onto the surface of carbon nanotubes, and further grafts epoxy-containing silane coupling agents onto the hydroxyl groups on the surface of carbon nanotubes. When the aminosilane coupling agent is used to crosslink and cure with epoxy-containing polysiloxane resin, it can also crosslink with modified carbon nanotubes, thereby forming chemical bonds between carbon nanotubes and resin matrix, increasing the internal bonding force of the coating, and improving the protective life of the coating.

[0028] The conductive coating of the present invention can not only ensure excellent electrical conductivity and dispersion stability, but also enhance the bonding force between the filler and the resin matrix through chemical bonding, thereby improving the mechanical strength, weather resistance and long-term service performance of the coating. Attached Figure Description

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a flowchart of the preparation method of epoxy-silane modified carbon nanotubes according to the present invention;

[0031] Figure 2 This is a flowchart illustrating the preparation method of the conductive polysiloxane coating of the present invention. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] The conductive polysiloxane coating, its preparation method, and the conductive coating layer proposed in this invention are described below with reference to the accompanying drawings.

[0034] The conductive polysiloxane coating of the present invention comprises component A and component B, wherein the mass ratio of component A to component B is 9:1 to 5:1. Component A comprises, by mass parts, 45 to 60 parts of epoxy-based polysiloxane resin, 0.5 to 5 parts of epoxy-based silane-modified carbon nanotubes, 1.5 to 4 parts of additives, 20 to 35 parts of filler, and 10 to 18 parts of solvent. Component B is an aminosilane coupling agent.

[0035] It is understandable that the mass ratio of component A to component B can be 9:1, 8:1, 7:1, 6:1, 5:1, or any value within the range of any two values.

[0036] In some embodiments, the method for preparing the epoxy-silane modified carbon nanotubes, such as Figure 1 As shown, it includes:

[0037] (a) Introducing hydroxyl groups into carbon nanotubes after acid oxidation;

[0038] (b) Under acidic conditions, γ-glycidoxypropyltrimethoxysilane was added and reacted to obtain the epoxysilane-modified carbon nanotubes.

[0039] In step (a), the oxidant for acid oxidation includes a mixture of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1. In step (b), the acidic environment is provided by dilute hydrochloric acid. Under these acidic conditions, the carbon nanotubes with introduced hydroxyl groups react with γ-glycidoxypropyltrimethoxysilane (KH560), thereby grafting epoxy groups onto the carbon nanotubes and completing the modification of the carbon nanotubes.

[0040] In some embodiments, the aminosilane coupling agent of component B includes one or both of γ-aminopropyltriethoxysilane (KH550) and γ-aminopropyltrimethoxysilane (KH540).

[0041] In some embodiments, the solvent for component A includes one or more of xylene, butanone, and anhydrous ethanol.

[0042] In some embodiments, the additives in component A include one or more of leveling agents, thixotropic agents, anti-settling agents, defoamers, and dispersants.

[0043] The leveling agent includes one or more of PDMS (polydimethylsiloxane), ODPO (diphenyl-octyl phosphite), DDA (dodecylamine), and DMPA (dimethylolpropionic acid); the thixotropic agent includes one or more of organobentonite, polyethylene wax, and fumed silica; the anti-settling agent includes one or more of modified urea solution, organobentonite, fumed silica, polyamide wax, and polyethylene wax; the defoamer includes one or more of polysiloxane-type defoamers and modified silicone oil-type defoamers; and the dispersant includes one or more of dodecylbenzene sulfonate wetting agents, phenolic resin wetting agents, and alkyl methyl acrylate copolymers.

[0044] In some embodiments, the filler of component A includes one or more of the following: rust-preventive filler, corrosion-resistant filler, flake filler, and pigment.

[0045] Among them, the rust-preventive filler includes one or more of zinc phosphate, zinc molybdate, and modified silica; the corrosion-resistant filler includes one or more of mica iron oxide, barium sulfate, ceramic microspheres, and kaolin; the flake filler includes one or more of glass flakes, mica iron oxide, mica powder, and vermiculite; and the pigments include one or more of titanium dioxide, zinc oxide, carbon black, iron oxide red, iron oxide yellow, iron oxide brown, and iron oxide black.

[0046] The preparation method of the conductive polysiloxane coating is applicable to the conductive polysiloxane coating of the present invention, such as... Figure 2 As shown, the following steps are included:

[0047] (1) Dissolve epoxy-based polysiloxane resin in a solvent to form a resin solution;

[0048] (2) Epoxysilane-modified carbon nanotubes are dispersed in a solvent, ultrasonicated, and then added to the resin solution, along with additives and fillers, and dispersed at high speed.

[0049] (3) Grind the high-speed dispersed material, discharge it, and filter it to obtain component A;

[0050] (4) Add component B to component A and stir evenly to obtain a conductive polysiloxane coating.

[0051] In step (1), the epoxy polysiloxane resin is dissolved in a solvent and stirred for 15 to 30 minutes to dissolve.

[0052] In step (2), the ultrasonic treatment time is 30-120 min, and the high-speed dispersion is carried out by using a high-speed disperser at 1000-1800 r / min for 30-120 min.

[0053] In step (3), the material is ground until the fineness is below 30μm, and the grinding time is 3 to 6 hours.

[0054] The conductive polysiloxane coating of the present invention is sprayed onto the surface of an object to form a conductive coating, the surface resistivity of which is 10. 4 ~10 6 Ω / sq, cross-cut adhesion ≥4B (ASTM D3359).

[0055] The present invention will be described in detail below with reference to the embodiments.

[0056] Example 1

[0057] Preparation of epoxy-silane modified carbon nanotubes:

[0058] Two g of multi-walled carbon nanotubes were sonicated in a 40 ml mixture of H2SO4 / HNO3 (volume ratio 3:1) for 3 h, washed and dried to obtain hydroxylated CNTs, wherein the concentration of H2SO4 was 98% and the concentration of HNO3 was 65%–68%.

[0059] 2g of hydroxylated CNTs and 0.5g of KH560 were reacted in hydrochloric acid solution at pH 4.5 at 80℃ for 6h to prepare CNTs-KH560.

[0060] Conductive polysiloxane coating formulation:

[0061] Component A:

[0062] 55 parts of epoxy-based polysiloxane resin;

[0063] Three parts of epoxy-silane modified carbon nanotubes;

[0064] Xylene solvent: 12 parts;

[0065] Leveling agent PDMS: 0.5 parts;

[0066] Anti-settling agent: organic bentonite: 1 part;

[0067] Modified silicone oil-based defoamer: 0.7 parts;

[0068] Dispersant: Alkyl methyl acrylate copolymer: 0.8 parts;

[0069] Zinc phosphate, a rust-inhibiting filler: 15 parts;

[0070] Flake-shaped filler glass flakes: 8 parts;

[0071] Pigment titanium dioxide: 4 parts;

[0072] Component B: aminosilane coupling agent KH550, wherein the mass ratio of component A to component B is 8:1.

[0073] Preparation of conductive polysiloxane coatings:

[0074] (1) Dissolve epoxy polysiloxane resin in xylene and stir for 30 min to form a resin solution.

[0075] (2) CNTs-KH560 was dispersed in xylene, ultrasonically treated (500W, 90min), and then added to the resin solution, along with additives and fillers. The mixture was then dispersed at 1500r / min for 60min using a high-speed disperser.

[0076] (3) Grind the material in a ball mill for 3 hours until the fineness reaches below 30μm, then discharge and filter to obtain component A.

[0077] (4) Add component B to the above component A material and stir evenly to obtain a conductive polysiloxane coating that can be sprayed to form a conductive polysiloxane coating.

[0078] Example 2

[0079] Preparation of epoxy-silane modified carbon nanotubes:

[0080] Two g of multi-walled carbon nanotubes were sonicated in a 40 ml mixture of H2SO4 / HNO3 (volume ratio 3:1) for 3 h, washed and dried to obtain hydroxylated CNTs, wherein the concentration of H2SO4 was 98% and the concentration of HNO3 was 65%–68%.

[0081] 2g of hydroxylated CNTs and 0.5g of KH560 were reacted in hydrochloric acid solution at pH 4.5 at 80℃ for 6h to prepare CNTs-KH560.

[0082] Conductive polysiloxane coating formulation:

[0083] Component A:

[0084] 55 parts of epoxy-based polysiloxane resin;

[0085] Five parts of epoxy-silane modified carbon nanotubes;

[0086] Xylene solvent: 12 parts;

[0087] Leveling agent PDMS: 0.5 parts;

[0088] Anti-settling agent: organic bentonite: 1 part;

[0089] Modified silicone oil-based defoamer: 0.7 parts;

[0090] Dispersant: Alkyl methyl acrylate copolymer: 0.8 parts;

[0091] Zinc phosphate, a rust-inhibiting filler: 15 parts;

[0092] Flake-shaped filler glass flakes: 8 parts;

[0093] Pigment titanium dioxide: 4 parts;

[0094] Component B: aminosilane coupling agent KH550, wherein the mass ratio of component A to component B is 8:1.

[0095] Preparation of conductive polysiloxane coatings:

[0096] (1) Dissolve epoxy polysiloxane resin in xylene and stir for 30 min to form a resin solution.

[0097] (2) CNTs-KH560 was dispersed in xylene, ultrasonically treated (500W, 90min), and then added to the resin solution, along with additives and fillers. The mixture was then dispersed at 1500r / min for 60min using a high-speed disperser.

[0098] (3) Grind the material in a ball mill for 3 hours until the fineness reaches below 30μm, then discharge and filter to obtain component A.

[0099] (4) Add component B to the above component A material and stir evenly to obtain a conductive polysiloxane coating that can be sprayed to form a conductive polysiloxane coating.

[0100] Example 3

[0101] Preparation of epoxy-silane modified carbon nanotubes:

[0102] Two g of multi-walled carbon nanotubes were sonicated in a 40 ml mixture of H2SO4 / HNO3 (volume ratio 3:1) for 3 h, washed and dried to obtain hydroxylated CNTs, wherein the concentration of H2SO4 was 98% and the concentration of HNO3 was 65-68%.

[0103] 2g of hydroxylated CNTs and 0.5g of KH560 were reacted in hydrochloric acid solution at pH 4.5 at 80℃ for 6h to prepare CNTs-KH560.

[0104] Conductive polysiloxane coating formulation:

[0105] Component A:

[0106] 55 parts of epoxy-based polysiloxane resin;

[0107] 0.5 parts of epoxy-silane modified carbon nanotubes;

[0108] Xylene solvent: 12 parts;

[0109] Leveling agent PDMS: 0.5 parts;

[0110] Anti-settling agent: organic bentonite: 1 part;

[0111] Modified silicone oil-based defoamer: 0.7 parts;

[0112] Dispersant: Alkyl methyl acrylate copolymer: 0.8 parts;

[0113] Zinc phosphate, a rust-inhibiting filler: 15 parts;

[0114] Flake-shaped filler glass flakes: 8 parts;

[0115] Pigment titanium dioxide: 4 parts;

[0116] Component B: aminosilane coupling agent KH550, wherein the mass ratio of component A to component B is 8:1.

[0117] Preparation of conductive polysiloxane coatings:

[0118] (1) Dissolve epoxy polysiloxane resin in xylene and stir for 30 min to form a resin solution.

[0119] (2) CNTs-KH560 was dispersed in xylene, ultrasonically treated (500W, 90min), and then added to the resin solution, along with additives and fillers. The mixture was then dispersed at 1500r / min for 60min using a high-speed disperser.

[0120] (3) Grind the material in a ball mill for 3 hours until the fineness reaches below 30μm, then discharge and filter to obtain component A.

[0121] (4) Add component B to the above component A material and stir evenly to obtain a conductive polysiloxane coating that can be sprayed to form a conductive polysiloxane coating.

[0122] Comparative Example 1

[0123] Preparation of epoxy-silane modified unhydroxylated carbon nanotubes:

[0124] 2g of multi-walled carbon nanotubes and 0.5g of KH560 were added to a hydrochloric acid solution with a pH of 4.5 and reacted at 80°C for 6 hours to obtain a mixture of unhydroxylated carbon nanotubes and KH560 (unhydroxylated CNTs / KH560).

[0125] Conductive polysiloxane coating formulation:

[0126] Component A:

[0127] 55 parts of epoxy-based polysiloxane resin;

[0128] 3 parts of unhydroxylated CNTs / KH560;

[0129] Xylene solvent: 12 parts;

[0130] Leveling agent PDMS: 0.5 parts;

[0131] Anti-settling agent: organic bentonite: 1 part;

[0132] Modified silicone oil-based defoamer: 0.7 parts;

[0133] Dispersant: Alkyl methyl acrylate copolymer: 0.8 parts;

[0134] Zinc phosphate, a rust-inhibiting filler: 15 parts;

[0135] Flake-shaped filler glass flakes: 8 parts;

[0136] Pigment titanium dioxide: 4 parts;

[0137] Component B: aminosilane coupling agent KH550, wherein the mass ratio of component A to component B is 8:1. The preparation of the conductive polysiloxane coating is the same as in Example 1.

[0138] Comparative Example 2

[0139] Preparation of silane-coated CNTs:

[0140] Two g of multi-walled carbon nanotubes were soaked in 0.5 g of KH560 for 60 min to obtain silane-coated CNTs.

[0141] Conductive polysiloxane coating formulation:

[0142] Component A:

[0143] 55 parts of epoxy-based polysiloxane resin;

[0144] Three parts of CNTs were physically coated with silane.

[0145] Xylene solvent: 12 parts;

[0146] Leveling agent PDMS: 0.5 parts;

[0147] Anti-settling agent: organic bentonite: 1 part;

[0148] Modified silicone oil-based defoamer: 0.7 parts;

[0149] Dispersant: Alkyl methyl acrylate copolymer: 0.8 parts;

[0150] Zinc phosphate, a rust-inhibiting filler: 15 parts;

[0151] Flake-shaped filler glass flakes: 8 parts;

[0152] Pigment titanium dioxide: 4 parts;

[0153] Component B: aminosilane coupling agent KH550, wherein the mass ratio of component A to component B is 8:1. The preparation of the conductive polysiloxane coating is the same as in Example 1.

[0154] Comparative Example 3

[0155] Conductive polysiloxane coating formulation:

[0156] Component A:

[0157] 55 parts of polysiloxane resin;

[0158] Three parts of epoxy-silane modified carbon nanotubes;

[0159] Xylene solvent: 12 parts;

[0160] Leveling agent PDMS: 0.5 parts;

[0161] Anti-settling agent: organic bentonite: 1 part;

[0162] Modified silicone oil-based defoamer: 0.7 parts;

[0163] Dispersant: Alkyl methyl acrylate copolymer: 0.8 parts;

[0164] Zinc phosphate, a rust-inhibiting filler: 15 parts;

[0165] Flake-shaped filler glass flakes: 8 parts;

[0166] Pigment titanium dioxide: 4 parts.

[0167] Preparation of conductive polysiloxane coatings:

[0168] (1) Dissolve the polysiloxane resin in xylene and stir for 30 minutes to form a resin solution.

[0169] (2) CNTs-KH560 was dispersed in xylene, ultrasonically treated (500W, 90min), and then added to the resin solution, along with additives and fillers. The mixture was then dispersed at 1500r / min for 60min using a high-speed disperser.

[0170] (3) Grind the material in a ball mill for 3 hours until the fineness reaches below 30μm, discharge the material, filter it to obtain component A, which is the conductive coating.

[0171] Test case

[0172] The coatings prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to surface resistivity, adhesion and salt spray tests. The test results are shown in Table 1 below.

[0173] The salt spray test method is based on GB / T 1771-2007; the adhesion test method is based on GB / T5210; and the surface resistivity test method is based on ISO 15091:2019.

[0174] Table 1:

[0175]

[0176] As can be seen from Examples 1-3 and Comparative Examples 1 and 2, simply physically mixing or coating carbon nanotubes with KH560 cannot modify the carbon nanotubes, and therefore cannot achieve the effect of stabilizing the coating and conducting static electricity.

[0177] According to Examples 1-3 and Comparative Example 3, it can be seen that without the addition of aminosilane or epoxy resin, a conductive coating with good performance cannot be obtained. This indicates that while using aminosilane coupling agent to crosslink and cure with epoxy-containing polysiloxane resin, it can also crosslink with modified carbon nanotubes, thereby enabling the carbon nanotubes to form chemical bonds with the resin matrix, increasing the internal bonding force of the coating and improving the protective service life of the coating.

[0178] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms may refer to different embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0179] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0180] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A conductive polysiloxane coating, characterized in that, Includes component A and component B with a mass ratio of 9:1 to 5:

1. in, By weight, component A comprises 45-60 parts epoxy-based polysiloxane resin, 0.5-5 parts epoxy-based silane-modified carbon nanotubes, 1.5-4 parts additives, 20-35 parts filler, and 10-18 parts solvent. Component B is an aminosilane coupling agent.

2. The conductive polysiloxane coating as described in claim 1, characterized in that, The preparation of the epoxy-silane modified carbon nanotubes includes: Hydroxyl groups are introduced into carbon nanotubes after acid oxidation; Under acidic conditions, γ-glycidoxypropyltrimethoxysilane was added and reacted to obtain the epoxysilane-modified carbon nanotubes.

3. The conductive polysiloxane coating as described in claim 2, characterized in that, The oxidizing agent for the acid oxidation includes a mixture of concentrated sulfuric acid and concentrated nitric acid, and the acidic conditions are provided by dilute hydrochloric acid.

4. The conductive polysiloxane coating as described in claim 1, characterized in that, The aminosilane coupling agent includes one or both of γ-aminopropyltriethoxysilane and γ-aminopropyltrimethoxysilane.

5. The conductive polysiloxane coating as described in claim 1, characterized in that, The solvent includes one or more of xylene, butanone, and anhydrous ethanol.

6. The conductive polysiloxane coating as described in claim 1, characterized in that, The additives include one or more of the following: leveling agents, thixotropic agents, anti-settling agents, defoamers, and dispersants.

7. The conductive polysiloxane coating as described in claim 1, characterized in that, The filler includes one or more of the following: rust-preventive filler, corrosion-resistant filler, flake filler, and pigment.

8. A method for preparing a conductive polysiloxane coating, characterized in that, The conductive polysiloxane coating according to any one of claims 1 to 7 comprises the following steps: (1) Dissolve epoxy-based polysiloxane resin in a solvent to form a resin solution; (2) Epoxysilane-modified carbon nanotubes are dispersed in a solvent, ultrasonicated, and then added to the resin solution, along with additives and fillers, and dispersed at high speed. (3) Grind the high-speed dispersed material, discharge it, and filter it to obtain component A; (4) Add component B to component A and stir evenly to obtain a conductive polysiloxane coating.

9. The method as described in claim 8, characterized in that, In step (3), the material is ground until the fineness is below 30 μm.

10. A conductive coating, characterized in that, Formed by spraying the conductive polysiloxane coating as described in any one of claims 1 to 7 or the conductive polysiloxane coating as described in claim 8 or 9.

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