Cellulose-doped cesium-tungsten bronze modified epoxy silane infrared stealth coating material as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of infrared stealth, and particularly relates to a cellulose doped cesium tungsten bronze modified epoxy silane infrared stealth coating material as well as a preparation method and application thereof. Through the ternary collaborative design of cellulose, cesium tungsten bronze and epoxy silane, and by adopting a physical blending-chemical grafting process, the problems of high toxicity, low hardness and complex process of the existing coating are solved. The prepared coating has a good infrared stealth effect, the pencil hardness can reach 9H, and the thermal decomposition temperature is gt; and the preparation process is solvent-free, low-temperature and efficient, the low-infrared-emissivity effect, high hardness and good wear resistance are achieved, the coating is suitable for direct coating of military equipment (such as unmanned aerial vehicles), the original structure does not need to be changed, and the application prospect is wide.

Description

Technical Field

[0001] This invention belongs to the field of infrared stealth technology, specifically relating to a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material, its preparation method, and its application. Background Technology

[0002] The information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Infrared stealth technology, by manipulating the infrared radiation characteristics of a target object to make it difficult to detect in infrared detection systems, has become a core technology for modern military equipment (such as drones and armored vehicles) and energy-efficient buildings (such as low-emissivity window films). Current mainstream research focuses on two main approaches: Low emissivity materials (such as thin metal films and conductive oxides) reduce infrared radiation through high reflectivity; Temperature control materials (such as phase change materials and thermal insulation layers) – block heat transfer to suppress the temperature rise of the target surface.

[0004] Currently, solutions designed for infrared stealth technology include organic polymer-based coatings, inorganic nanomaterials, and advanced structural materials. However, these technologies still have the following technical problems: (1) Toxicity issues: Oil-based coatings contain volatile toxic components (such as organic solvents), which are harmful to human health and the environment; (2) Insufficient mechanical properties: Organic polymer adhesives result in low surface hardness (≤4H) and poor wear resistance of the coating; (3) Complex process: The preparation of materials such as photonic crystals and aerogels requires complex processes (such as high-temperature sintering) and is costly.

[0005] Cesium tungsten bronze is a functional material with excellent infrared absorption properties, capable of shielding near-infrared light with wavelengths greater than 1100 nm. It offers a wider infrared shielding wavelength range than materials such as antimony tin oxide (ATO), indium tin oxide (ITO), and aluminum zinc oxide (AZO). However, its poor dispersibility in resins affects coating quality. While cellulose possesses low thermal conductivity (0.04 W / m·K) and biodegradability, its use in infrared shielding materials is rarely reported. Cage-type polysilsesquioxane (POSS) offers heat resistance due to its Si-O bond energy (445.2 kJ / mol), but single-POSS coatings exhibit poor infrared emissivity.

[0006] Therefore, those skilled in the art urgently need to develop a new coating material that combines low infrared emissivity, high hardness, and good wear resistance to break through existing technological bottlenecks. Summary of the Invention

[0007] To address the needs of existing technologies, the purpose of this invention is to provide a cellulose-doped cesium tungsten bronze-modified epoxy silane infrared stealth coating material, its preparation method, and its applications. This invention utilizes a ternary synergistic design of cellulose, cesium tungsten bronze, and epoxy silane, employing a physical blending-chemical crosslinking process to solve the problems of high toxicity, low hardness, and complex processes in existing coatings. The material prepared by this invention exhibits low infrared emissivity, a pencil hardness of 9H, and a thermal decomposition temperature >400℃. Furthermore, the solvent-free, low-temperature, and highly efficient preparation process makes it suitable for direct coating of military equipment (such as drones) without altering the original structure, demonstrating broad application prospects.

[0008] Specifically, the present invention provides the following technical solution: In a first aspect, the present invention provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material, comprising, by weight parts: 0.1-15 parts cesium tungsten bronze powder, 20-70 parts epoxy silane, 9-15 parts alkaline catalyst, 1-5 parts cellulose powder, 10-50 parts dispersant, and 1-6 parts photoinitiator; wherein the cellulose powder and epoxy silane hydrolyze to form a cage-like polysilsesquioxane to form an organic-inorganic hybrid crosslinked network structure through chemical grafting, and the cesium tungsten bronze powder is uniformly dispersed in the organic-inorganic hybrid crosslinked network.

[0009] Preferably, the cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material comprises, by weight, the following raw materials: 1 part cesium tungsten bronze powder, 50 parts epoxy silane, 10 parts alkaline catalyst, 3 parts cellulose, 32 parts dispersant and 4 parts photoinitiator.

[0010] Preferably, the particle size of the cesium tungsten bronze powder is 5~50 μm. Too small a particle size leads to difficulty in dispersion, agglomeration, and stress concentration points, resulting in reduced coating strength; too large a particle size causes sedimentation, leading to uneven coating and decreased hardness. A suitable particle size range ensures that the cesium tungsten bronze is uniformly dispersed in the resin network, synergistically improving hardness and reducing stress concentration with the organic-inorganic dual crosslinked network (cellulose-epoxysilane hybrid), thus maintaining wear resistance.

[0011] Preferably, the epoxy silane is selected from one or more of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltriethoxysilane, γ-(2,3-epoxypropoxy)propylmethyldiethoxysilane, γ-(2,3-epoxypropoxy)propylmethyldiethoxysilane, (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, (2-(3,4-epoxycyclohexyl)ethyl)triethoxysilane, and their blends and copolymers. The epoxy silane is aliphatic or alicyclic epoxy silane, possessing moderately high molecular chain flexibility, readily reacting with cellulose to form a double crosslinked network, which is beneficial for improving the hardness of the coating.

[0012] Preferably, the alkaline catalyst is an alkaline solution with a pH of 8 to 12 and a concentration of 0.01% to 0.5%, preferably sodium hydroxide.

[0013] Preferably, the cellulose powder is microcrystalline cellulose with an average particle size of 1~100 μm. If the particle size is too small (such as nanocellulose), it is difficult to disperse in the resin, resulting in agglomeration, reducing coating strength, and damaging the surface smoothness of the coating; if the particle size is too large, it cannot form a uniform and smooth coating, and at the same time, the specific surface area is reduced, reducing the reactive sites and lowering the crosslinking density of the system. A suitable particle size range is beneficial to improving the dispersibility, hardness, and other properties of the material.

[0014] Preferably, the dispersant is selected from one or more of 1,4-cyclohexanediethanol diglycidyl ether, ethylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and 3-ethyl-3-(benzoyloxy)methyloxetane.

[0015] Preferably, the photoinitiator is selected from one or more of diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, triarylsulfonium hexafluorophosphate, triarylsulfonium hexafluoroantimonate, and diaryl-tetrahydrofuranyliodonium salt.

[0016] A second aspect of the present invention provides a method for preparing the above-mentioned cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material, comprising the following steps: S1. Cellulose powder and cesium tungsten bronze powder are physically blended to obtain a cellulose-cesium tungsten bronze blend; then a dispersant is added and the mixture is stirred to form a mixed solution; S2. The epoxy silane is heated and reacted with an alkaline catalyst, and then mixed and stirred in the dark with the mixed solution obtained in step S1 and the photoinitiator to obtain the final product.

[0017] Preferably, in step S1, the physical blending is carried out by ball milling.

[0018] Preferably, in step S2, the heating reaction temperature is 60~100℃ and the time is 1~10 h.

[0019] A third aspect of the present invention provides an application of the cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material described in the first aspect in infrared stealth materials.

[0020] A fourth aspect of the present invention is a military equipment comprising the cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material described in the first aspect, wherein the surface of the equipment is coated with the coating material, and the coating thickness is 10~200 μm.

[0021] Preferably, the military equipment includes the fuselage of a drone, the outer shell of a vehicle, or the deck of a ship.

[0022] The beneficial effects achieved by one or more of the above technical solutions of the present invention are as follows: (1) This invention achieves three major breakthroughs simultaneously: infrared stealth, ultra-high hardness, and environmentally friendly manufacturing through innovative design of cellulose premix dispersion, epoxy silane double crosslinking, and cesium tungsten bronze functionalization. It is especially suitable for the stealth coating upgrade of military equipment and has both engineering feasibility and large-scale application potential.

[0023] (2) By premixing cellulose with cesium tungsten bronze, the dispersibility of cesium tungsten bronze in the resin is improved, thus improving the coating uniformity. At the same time, the cross-linking reaction between cellulose and epoxy silane is used to form an organic-inorganic hybrid double cross-linking network structure, which improves the hardness and surface wear resistance of the coating and extends the coating life.

[0024] (3) The present invention uses a non-toxic formula, the raw materials are readily available, the process is simplified and the production cost can be reduced, and it has application prospects. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0026] Figure 1 This is a schematic diagram of the chemical structure reaction of the infrared stealth coating material prepared according to an embodiment of the present invention; Figure 2 The infrared spectrum of the infrared stealth coating material prepared in Example 1 of this invention; Figure 3 The XRD pattern of the infrared stealth coating material prepared in Example 1 of this invention; Figure 4 This is a schematic diagram showing the wear resistance test results of the coating materials prepared in Example 1 and Comparative Example 3 of the present invention. Detailed Implementation

[0027] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0029] Example 1 This embodiment provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material and its preparation method. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material prepared in this embodiment includes the following raw materials by mass: 1 part cesium tungsten bronze powder, 50 parts (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts alkaline catalyst, 3 parts cellulose powder, 32 parts ethylene glycol diglycidyl ether, and 4 parts triarylsulfonium hexafluoroantimonate.

[0030] The preparation method of the above-mentioned cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material includes the following steps: (1) Cellulose powder and cesium tungsten bronze powder were physically blended in a ball mill to obtain a cellulose-cesium tungsten bronze blend; (2) The dispersant and the cellulose-cesium tungsten bronze blend obtained in step (1) are physically stirred and mixed evenly to obtain a mixed solution; (3) Epoxysilane was mixed with an alkaline catalyst (NaOH solution with pH 11) and heated at 80°C for 4 h to obtain a transparent viscous liquid; (4) Mix the mixed solution from step (2), the transparent viscous liquid from step (3), and the photoinitiator, and stir in the dark to obtain the cellulose-doped cesium tungsten bronze modified epoxy polysilsesquioxane coating material.

[0031] Example 2 This embodiment provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material and its preparation method. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material prepared in this embodiment includes the following raw materials by mass: 0.5 parts cesium tungsten bronze powder, 50 parts (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts alkaline catalyst, 3 parts cellulose powder, 32 parts ethylene glycol diglycidyl ether, and 4 parts triarylsulfonium hexafluoroantimonate. The remaining steps are completely consistent with those in Example 1.

[0032] Example 3 This embodiment provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material and its preparation method. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material prepared in this embodiment includes the following raw materials by mass: 1 part cesium tungsten bronze powder, 50 parts γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 10 parts alkaline catalyst, 3 parts cellulose powder, 32 parts ethylene glycol diglycidyl ether, and 4 parts triarylsulfonium hexafluoroantimonate. The alkaline catalyst is a NaOH solution with a pH of 11. The remaining steps are completely consistent with those in Example 1.

[0033] Example 4 This embodiment provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material and its preparation method. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material prepared in this embodiment includes the following raw materials by mass: 1 part cesium tungsten bronze powder, 50 parts (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts alkaline catalyst, 3 parts cellulose powder, 22 parts ethylene glycol diglycidyl ether, and 4 parts triarylsulfonium hexafluoroantimonate. The alkaline catalyst is a NaOH solution with a pH of 11. The remaining steps are completely consistent with those in Example 1.

[0034] Example 5 This embodiment provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material and its preparation method. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material prepared in this embodiment includes the following raw materials by mass: 0.5 parts cesium tungsten bronze powder, 60 parts (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts alkaline catalyst, 3 parts cellulose powder, 22 parts ethylene glycol diglycidyl ether, and 4 parts triarylsulfonium hexafluoroantimonate. The alkaline catalyst is a NaOH solution with a pH of 11. The remaining steps are completely consistent with those in Example 1.

[0035] Example 6 This embodiment provides a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material and its preparation method. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material prepared in this embodiment includes the following raw materials by mass: 0.5 parts of cesium tungsten bronze powder, 60 parts of (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts of alkaline catalyst, 3 parts of cellulose powder, 32 parts of ethylene glycol diglycidyl ether, and 4 parts of triarylsulfonium hexafluoroantimonate. In step (3), the epoxy silane and alkaline catalyst are mixed and heated at 80°C for 6 h. The remaining steps are completely consistent with those in Example 1.

[0036] Comparative Example 1 : The difference between this comparative example and Example 1 is that the coating material prepared in this comparative example, by mass parts, includes the following raw materials: 1 part of cesium tungsten bronze powder, 50 parts of (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts of alkaline catalyst, 0.5 parts of cellulose powder, 32 parts of ethylene glycol diglycidyl ether, and 4 parts of triarylsulfonium hexafluoroantimonate. The remaining steps are completely consistent with those in Example 1.

[0037] Comparative Example 2 : The difference between this comparative example and Example 1 is that the coating material prepared in this comparative example, by mass parts, includes the following raw materials: 1 part of cesium tungsten bronze powder, 50 parts of (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, 10 parts of alkaline catalyst, 20 parts of cellulose powder, 32 parts of ethylene glycol diglycidyl ether, and 4 parts of triarylsulfonium hexafluoroantimonate. The remaining steps are completely consistent with those in Example 1.

[0038] Comparative Example 3 : The difference between this comparative example and Example 1 is that the coating material prepared in this comparative example, by mass parts, includes the following raw materials: 1 part cesium tungsten bronze powder, 50 parts epoxy resin (E-44), 3 parts cellulose powder, 32 parts ethylene glycol diglycidyl ether, and 4 parts triarylsulfonium hexafluoroantimonate. The remaining steps are completely consistent with those in Example 1.

[0039] Comparative Example 4 : The difference between this comparative example and Example 1 is that cesium tungsten bronze powder was not added, while the content and steps of the remaining components are completely consistent with those of Example 1.

[0040] Comparative Example 5 : The difference between this comparative example and Example 1 is that the amount of cesium tungsten bronze powder added is 0.01 parts, while the content steps of the other components are completely consistent with those of Example 1.

[0041] Comparative Example 6 : The difference between this comparative example and Example 1 is that the amount of cesium tungsten bronze powder added is 25 parts, while the content and steps of the other components are completely consistent with those of Example 1.

[0042] Comparative Example 7 : The difference between this comparative example and Example 1 is that no dispersant is added, while the steps for the content of the remaining components are completely consistent with those in Example 1.

[0043] Comparative Example 8 : The difference between this comparative example and Example 1 is that the amount of dispersant added is 1 part, while the steps for the content of the remaining components are completely consistent with those in Example 1.

[0044] Comparative Example 9 : The difference between this comparative example and Example 1 is that the amount of dispersant added is 60 parts, while the steps for the content of the remaining components are completely consistent with those in Example 1.

[0045] Comparative Example 10 : The difference between this comparative example and Example 1 is that no photoinitiator was added, while the content and steps of the remaining components are completely consistent with those of Example 1.

[0046] Experimental Example 1 This experimental example describes the structural determination of the cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating materials prepared in Examples 1-6. like Figure 1 The diagram shows the reaction mechanism of cellulose and siloxane in the infrared stealth coatings corresponding to Examples 1-6. Cellulose and epoxy silane are connected by covalent bonds, while epoxy silanes form a cross-linked structure through Si-O-Si bonds, forming a new organic-inorganic hybrid polymer after photocuring.

[0047] like Figure 2 As shown in the infrared spectrum of Example 1, the infrared spectrum shows that at 1264 cm⁻¹... -1 The presence of a characteristic absorption peak for the Si-O-Si stretching vibration at 890 cm⁻¹ verifies the structural characteristics of epoxysilane hydrolysis forming polysilsesquioxane. -1 The disappearance of the characteristic peak of epoxy is mainly due to the epoxy ring-opening grafting reaction between cellulose and siloxane, and the self-polymerization reaction between epoxy groups to form a double cross-linked network structure.

[0048] like Figure 3 As shown, the high-resolution carbon X-ray energy dispersive spectroscopy (EDS) reveals that the infrared layer of this invention contains cesium tungsten bronze crystals, and the crystal structure of the cesium tungsten bronze has not undergone any changes.

[0049] Experimental Example 1 This experiment tested the performance of the coating materials prepared in Examples 1-6 and Comparative Examples 1-10. The specific data are shown in Table 1. Table 1

[0050] Analysis of the data in Table 1 shows that the addition of cesium tungsten bronze in this invention can give the coating an infrared shielding effect, and the shielding effect becomes more obvious with the increase of the amount of cesium tungsten bronze added. However, too much cesium tungsten bronze will have an adverse effect on the hardness and fluidity of the coating, thus making the coating difficult to use. Cellulose can increase the heat insulation performance of the coating, but too much cellulose will destroy the continuity of the resin in the coating, resulting in a decrease in the hardness of the coating. Too many hydroxyl groups will also compete with the ring-opening polymerization of the epoxy itself, resulting in the destruction of the double crosslinking system.

[0051] Figure 4 The results of the steel wool abrasion test were conducted after the coatings prepared in Comparative Example 3 and Example 1 of this invention were applied to stainless steel. The results showed that the epoxy resin coating had poor abrasion resistance, and a rough surface was formed after friction, with a large amount of debris generated around it. However, the coating prepared in the example of this invention was not damaged and had high abrasion resistance. This is mainly because the coating of this invention contains a large number of organosilicon nanostructures, which have high surface hardness and are not easily scratched.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material, characterized in that, The product comprises, by weight parts, the following raw materials: 0.1-15 parts cesium tungsten bronze powder, 20-70 parts epoxy silane, 9-15 parts alkaline catalyst, 1-5 parts cellulose powder, 10-50 parts dispersant, and 1-6 parts photoinitiator; wherein the cage-like polysilsesquioxane formed by the hydrolysis of cellulose and epoxy silane is chemically grafted to form an organic-inorganic hybrid cross-linked network structure, and the cesium tungsten bronze powder is uniformly dispersed in the organic-inorganic hybrid cross-linked network.

2. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material as described in claim 1, characterized in that, The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material comprises, by weight, the following raw materials: 1 part cesium tungsten bronze powder, 50 parts epoxy silane, 10 parts alkaline catalyst, 3 parts cellulose, 32 parts dispersant and 4 parts photoinitiator.

3. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material as described in claim 1, characterized in that, The particle size of the cesium tungsten bronze powder is 5~50 μm; Preferably, the alkaline catalyst is an alkaline solution with a pH of 8-12 and a concentration of 0.01%-0.5%, more preferably sodium hydroxide; Preferably, the cellulose powder is microcrystalline cellulose with an average particle size of 1~100 μm.

4. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material as described in claim 1, characterized in that, The epoxy silane is selected from one or more of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-(2,3-epoxypropoxy)propyltriethoxysilane, γ-(2,3-epoxypropoxy)propylmethyldiethoxysilane, γ-(2,3-epoxypropoxy)propylmethyldiethoxysilane, (2-(3,4-epoxycyclohexyl)ethyl)trimethoxysilane, (2-(3,4-epoxycyclohexyl)ethyl)triethoxysilane, and their blends and copolymers.

5. The cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material as described in claim 1, characterized in that, The dispersant is selected from one or more of 1,4-cyclohexanediethanol diglycidyl ether, ethylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and 3-ethyl-3-(benzoyloxy)methyloxetane; Preferably, the photoinitiator is selected from one or more of diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, triarylsulfonium hexafluorophosphate, triarylsulfonium hexafluoroantimonate, and diaryl-tetrahydrofuranyliodonium salt.

6. A method for preparing a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material according to any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Cellulose powder and cesium tungsten bronze powder are physically blended to obtain a cellulose-cesium tungsten bronze blend; then a dispersant is added and the mixture is stirred to form a mixed solution; S2. The epoxy silane is heated and reacted with an alkaline catalyst, and then mixed and stirred in the dark with the mixed solution obtained in step S1 and the photoinitiator to obtain the final product.

7. The preparation method according to claim 6, characterized in that, In step S1, the physical blending is carried out by ball milling; Preferably, in step S2, the heating reaction temperature is 60~100℃ and the time is 1~10 h.

8. The application of the cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material according to any one of claims 1 to 5 in infrared stealth materials.

9. A type of military equipment, characterized in that, The equipment comprises a cellulose-doped cesium tungsten bronze modified epoxy silane infrared stealth coating material as described in any one of claims 1 to 5, wherein the surface of the equipment is coated with the coating material and the coating thickness is 10 to 200 μm.

10. The military equipment as described in claim 9, characterized in that, The military equipment includes drone fuselages, vehicle shells, or ship decks.

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