Camouflage coating compatible with visible light and far infrared light as well as preparation method and application of camouflage coating

Abstract

The invention belongs to the technical field of functional coatings, and particularly relates to a visible light and far infrared compatible camouflage coating as well as a preparation method and application thereof. The infrared emissivity of the camouflage coating is as low as 0.4, and the emissivity of slurries with different colors can be controlled by adjusting the content of the infrared low-emissivity slurry during preparation; the camouflage coating prepared by the invention has infrared emissivity at the wave band of 8-14 microns, the emissivity of a high-emissivity coating is 0.7-0.8, the emissivity of a medium-emissivity coating is 0.5-0.6, the emissivity of a low-emissivity coating is not greater than 0.35, and the emissivity gradient is not greater than 0.15; through inspection, camouflage spots of woodland type and desert type coatings can effectively segment the outer contour of an infrared thermogram of target equipment within a 24-hour period, so that the aim of visible light and infrared stealth is fulfilled.

Description

Technical Field

[0001] The present invention belongs to the technical field of functional coatings, and in particular relates to a camouflage coating compatible with visible light and far infrared, and a preparation method and application thereof. Background Art

[0002] In recent years, with the rapid development and functional integration of infrared thermal detection and visible light recognition methods, conventional targets with only single-band camouflage have become a serious threat. Therefore, the realization of visible light / near infrared-far infrared dual-band camouflage function has become an indispensable and urgent technology. Combined with the above analysis and research on the current situation, the current visible light-infrared dual-band compatible camouflage can be divided into two categories according to the specific camouflage means: visible light color-low emissivity infrared compatibility and low gloss-low emissivity infrared compatibility.

[0003] For infrared camouflage, the goal is to reduce the target emissivity, while visible light camouflage can be divided into two aspects: reducing gloss and achieving specific color changes. In terms of reducing gloss, Nanjing University of Aeronautics and Astronautics implemented matting treatment on Al powder low emissivity materials by adding matting agents, color pastes and metal powders, and used bronze powder to quantitatively replace Al powder to overcome the negative correlation between surface gloss and infrared emissivity to a certain extent, achieving low gloss (9%) and emissivity (0.1) compatible camouflage coatings; Xi'an Jiaotong University used modified Al powder as metal filler and polyurethane as binder to prepare low infrared emissivity camouflage coatings, in which Al powder surface was modified with polyethylene wax to reduce the original emissivity and gloss, and the optimal result was gloss 6Gs and infrared emissivity 0.53. The University of Electronic Science and Technology used a water bath method to prepare a magnetic core-shell structure visible light / near infrared-far infrared compatible coating with Fe3O4 covered on the surface of flaky Al powder. The visible light brightness was reduced by 45% compared with the uncoated Al powder, and the infrared 8-14μm emissivity was only increased by 0.13. In order to achieve specific colors, Nanjing University of Technology prepared Bi2O3 / ATO filler by solid-phase ball milling of 70% Bi2O3 and 30% antimony-doped tin oxide (ATO). Its infrared emissivity is 0.67, and the different brightness of yellow-orange light is related to the calcination temperature during the preparation process. This type of visible light-infrared compatible coating has the advantages of simple process and suitability for industrial production, but it also has the disadvantages of relatively high coating emissivity and relatively single visible light color type.

[0004] Based on the above research, it can be seen that the coating process is currently mainly used to achieve camouflage, usually using metal pigments and metal compound pigments with low infrared emissivity. Among them, metal pigments include gold powder, silver powder, copper powder, aluminum powder and iron powder; metal compound pigments include Cr2O3, Fe2O3, CdS, ZnS, etc. The former has a lower infrared emissivity, but it has the characteristics of high reflection of visible light, which affects the visible light stealth performance; the latter has a higher infrared emissivity, but has the characteristics of weak visible light reflection (good coloring) and good visible light stealth. Therefore, there is an urgent need for a camouflage coating that integrates low infrared emissivity and weak visible light reflection characteristics to solve the problems of single pigment color and difficult compatibility of infrared camouflage with visible light in far-infrared / visible light camouflage.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a camouflage coating compatible with visible light and far infrared, and a preparation method and application thereof.

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

[0008] On the one hand, the present invention provides a camouflage coating compatible with visible light and far infrared, which comprises the following components by weight: 10 to 15 parts of water-soluble resin, 70 to 95 parts of coloring dye, 5 to 30 parts of low-emissivity slurry, 5 to 10 parts of dispersant, 0.5 to 1 part of thickener, and 1 to 2 parts of fungicide;

[0009] The coloring dye includes several of titanium white paste, iron yellow paste, iron red paste, perylene black paste, 2600K paste, and brown paste;

[0010] The titanium dioxide paste is an important inorganic chemical pigment, the main component of which is titanium dioxide, which can improve the hiding power and durability of the paint; the iron yellow paste is mainly composed of iron oxide, with the chemical formula Fe2O3·H2O, which is a monohydrate of iron oxide; the iron red paste is mainly composed of iron oxide, which is an inorganic compound with the chemical formula Fe2O3; the perylene black paste is a perylene pigment, which is a high-end organic pigment with excellent application performance and is a category of polycyclic ketone (reducing dye) pigments; the 2600k paste is mainly composed of cobalt oxide, which is a blue-green color paste; the brown paste is BASF 3581 iron oxide brown paste.

[0011] The key component of the low-emissivity slurry is aluminum powder; the aluminum powder is preferably flaky aluminum powder, and the particle size and thickness of the flaky aluminum powder have a significant effect on the surface morphology and infrared emissivity of the coating. Smaller particle size will lead to poor orientation of the flaky aluminum powder and increased edge scattering; while thinner thickness will increase the probability of the resin absorbing infrared radiation, thereby reducing infrared reflectivity and increasing infrared emissivity. Thinner aluminum powder can reduce the infrared emissivity of the coating and increase the reflectivity of the coating; the smaller the particle size, the worse the orientation of the flaky aluminum powder, the increased edge scattering, resulting in an increase in the infrared emissivity of the coating; the flaky aluminum powder is prepared by physical vapor deposition combined with ultrasonic pulverization to accurately control the thickness and particle size of the flaky aluminum powder. The particle size and thickness of the flaky aluminum powder have a significant effect on the surface morphology and infrared emissivity of the coating.

[0012] When the thickness of the flaky aluminum powder is 300-500nm, preferably 400nm, the coating exhibits low infrared emissivity. The particle size of the flaky aluminum powder is between 2 and 20 microns, preferably 2-10 microns. When the particle size of the flaky aluminum powder is small, that is, less than 2 microns, its directional arrangement is poor and the edge scattering increases, which will lead to an increase in the infrared emissivity of the coating and a decrease in the reflectivity. On the contrary, if the particle size increases by more than 20 microns, although the reflection area of ​​a single particle increases, the overall reflection efficiency may decrease due to the gaps between particles and uneven arrangement.

[0013] Specifically, the water-soluble resin includes but is not limited to any one or more of polyurethane resin, epoxy resin, and acrylic resin.

[0014] Specifically, the dispersant is a polymer super dispersant, preferably one of an acrylate polymer dispersant, a polyurethane polymer dispersant, and a polyester polymer dispersant. The dispersant is an auxiliary agent that can enhance and improve the dispersion performance of solid or liquid materials in a liquid medium. It is widely used in various coatings because of its anchoring group and resin entanglement adsorption. It prevents flocculation between pigment particles by adsorbing on the surface of pigment particles and forming a protective layer, thereby maintaining the stability of the coating system. One end of its active group is adsorbed on the pigment surface, and the other end is solvated into the paint base, generating charge repulsion or entropy repulsion, so that the pigment particles are suspended in the paint base for a long time to avoid re-flocculation.

[0015] Specifically, the thickener is an associative thickener, preferably a polyurethane associative thickener. The associative polyurethane thickener can quickly restore viscosity under the action of shear force due to its special molecular structure, thereby effectively preventing sagging during construction.

[0016] Specifically, the fungicide is a triazine fungicide, preferably cypermethrin, and a proper amount of sodium pentachlorophenol or phenylmercuric acetate can be mixed in to enhance the antifungal performance.

[0017] On the other hand, the present invention provides a method for preparing the above-mentioned camouflage coating compatible with visible light and far infrared, which specifically comprises the following steps:

[0018] Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer, and use an ultrasonic machine to clean for 20-50 minutes to prepare defatted aluminum powder; the mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer is 80:10:5:5:800:20;

[0019] Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:500, then uniformly mixing, stirring speed is 600-800r / min, stirring time is 3-4h, during which chromium chloride hexahydrate is added dropwise at a speed of 20-40ml / h for 50min, then filtering and drying to obtain composite particles of chromium hydroxide coated flaky aluminum powder;

[0020] Step 3, placing the composite particles in a muffle furnace, calcining for 4-6 hours with nitrogen, and setting the temperature to 200-400° C. to obtain a colored aluminum powder low-emissivity pigment;

[0021] Step 4, mixing aluminum powder low emissivity pigment, coloring dye and water-soluble resin, wherein the mass ratio of aluminum powder low emissivity pigment, coloring dye and water-soluble resin is 3:18:2, and stirring at 60-100 r / min for 1-2 hours to obtain a mixture;

[0022] Step 5: The mass ratio of the mixture of the dispersant, the thickener and the bactericide is 5-10:1-2:2-4.

[0023] On the other hand, the present invention provides an application of the above-mentioned camouflage paint compatible with visible light and far infrared, wherein the camouflage paint compatible with visible light and far infrared is applied to the outer surface of the support cabin, and the coating thickness is less than 60 μm.

[0024] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0025] The infrared emissivity of the camouflage coating of the present invention is as low as 0.4, and the emissivity of slurries of different colors can be controlled by adjusting the content of the infrared low emissivity slurry during preparation;

[0026] The infrared emissivity of the camouflage coating prepared by the present invention in the 8μm to 14μm band is 0.7-0.8 for high emissivity coatings, 0.5-0.6 for medium emissivity coatings, no more than 0.35 for low emissivity coatings, and no more than 0.15 for emissivity gradients. After testing, the camouflage spots of woodland-type and desert-type coatings can effectively segment the outer contour of the infrared heat map of the target equipment within a 24-hour period, thereby achieving the purpose of visible light and infrared stealth. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0029] Figure 1 The present invention is a flow chart of the preparation method. DETAILED DESCRIPTION

[0030] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples consistent with some aspects of the present invention as detailed in the appended claims.

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] A camouflage paint compatible with visible light and far infrared comprises the following components by weight: 10 to 15 parts of water-soluble resin, 70 to 95 parts of coloring dye, 5 to 30 parts of low-emissivity slurry, 5 to 10 parts of dispersant, 0.5 to 1 part of thickener, and 1 to 2 parts of bactericide;

[0033] The coloring dye includes several of titanium white paste, iron yellow paste, iron red paste, perylene black paste, 2600K paste, and brown paste;

[0034] The titanium dioxide paste is an important inorganic chemical pigment, the main component of which is titanium dioxide. As a white pigment, it can improve the hiding power and durability of the paint; the iron yellow paste is mainly composed of iron oxide, with the chemical formula Fe2O3·H2O, which is a monohydrate of iron oxide; the iron red paste is mainly composed of iron oxide, which is an inorganic compound with the chemical formula Fe2O3; the perylene black paste is a perylene pigment, which is a high-end organic pigment with excellent application performance and a category of polycyclic ketone (reducing dye) pigments; the 2600k paste is mainly composed of cobalt oxide, which is a blue-green paste; the brown paste is BASF 3581 iron oxide brown paste.

[0035] The key component of the low-emissivity slurry is aluminum powder; the aluminum powder is preferably flaky aluminum powder, and the particle size and thickness of the flaky aluminum powder have a significant effect on the surface morphology and infrared emissivity of the coating. Smaller particle size will lead to poor orientation of the flaky aluminum powder and increased edge scattering; while thinner thickness will increase the probability of the resin absorbing infrared radiation, thereby reducing infrared reflectivity and increasing infrared emissivity. Thinner aluminum powder can reduce the infrared emissivity of the coating and increase the reflectivity of the coating; the smaller the particle size, the worse the orientation of the flaky aluminum powder, the increased edge scattering, resulting in an increase in the infrared emissivity of the coating; the flaky aluminum powder is prepared by physical vapor deposition combined with ultrasonic pulverization to accurately control the thickness and particle size of the flaky aluminum powder. The particle size and thickness of the flaky aluminum powder have a significant effect on the surface morphology and infrared emissivity of the coating.

[0036] When the thickness of the flaky aluminum powder is 300-500nm, preferably 400nm, the coating exhibits low infrared emissivity. The particle size of the flaky aluminum powder is between 2 and 20 microns, preferably 2-10 microns. When the particle size of the flaky aluminum powder is small, that is, less than 2 microns, its directional arrangement is poor and the edge scattering increases, which will lead to an increase in the infrared emissivity of the coating and a decrease in the reflectivity. On the contrary, if the particle size increases by more than 20 microns, although the reflection area of ​​a single particle increases, the overall reflection efficiency may decrease due to the gaps between particles and uneven arrangement.

[0037] Specifically, the water-soluble resin includes but is not limited to any one or more of polyurethane resin, epoxy resin, and acrylic resin.

[0038] Specifically, the dispersant is a polymer super dispersant, preferably one of an acrylate polymer dispersant, a polyurethane polymer dispersant, and a polyester polymer dispersant. The dispersant is an auxiliary agent that can enhance and improve the dispersion performance of solid or liquid materials in a liquid medium. It is widely used in various coatings because of its anchoring group and resin entanglement adsorption. It prevents flocculation between pigment particles by adsorbing on the surface of pigment particles and forming a protective layer, thereby maintaining the stability of the coating system. One end of its active group is adsorbed on the pigment surface, and the other end is solvated into the paint base, generating charge repulsion or entropy repulsion, so that the pigment particles are suspended in the paint base for a long time to avoid re-flocculation.

[0039] Specifically, the thickener is an associative thickener, preferably a polyurethane associative thickener. The associative polyurethane thickener can quickly restore viscosity under the action of shear force due to its special molecular structure, thereby effectively preventing sagging during construction.

[0040] Specifically, the fungicide is a triazine fungicide, preferably cypermethrin, and a proper amount of sodium pentachlorophenol or phenylmercuric acetate can be mixed in to enhance the antifungal performance.

[0041] See also Figure 1 As shown, the present invention also provides a method for preparing the above-mentioned camouflage coating compatible with visible light and far infrared, which specifically comprises the following steps:

[0042] Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer, and use an ultrasonic machine to clean for 20-50 minutes to prepare defatted aluminum powder; the mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer is 80:10:5:5:800:20;

[0043] Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:500, then uniformly mixing, stirring speed is 600-800r / min, stirring time is 3-4h, during which chromium chloride hexahydrate is added dropwise at a speed of 20-40ml / h for 50min, then filtering and drying to obtain composite particles of chromium hydroxide coated flaky aluminum powder;

[0044] Step 3, placing the composite particles in a muffle furnace, calcining for 4-6 hours with nitrogen, and setting the temperature to 200-400° C. to obtain a colored aluminum powder low-emissivity pigment;

[0045] Step 4, mixing aluminum powder low emissivity pigment, coloring dye and water-soluble resin, wherein the mass ratio of aluminum powder low emissivity pigment, coloring dye and water-soluble resin is 3:18:2, and stirring at 60-100 r / min for 1-2 hours to obtain a mixture;

[0046] Step 5: Add a dispersant, a thickener and a fungicide into the mixture in proportion to obtain a camouflage coating.

[0047] The present invention is further described below in conjunction with specific embodiments.

[0048] Example 1

[0049] The present embodiment provides a loess-colored infrared stealth coating, which includes, by weight: 10 to 15 parts of a water-soluble resin (polyurethane resin), 20 to 25 parts of a coloring dye, 25 to 35 parts of a low-emissivity slurry, 5 to 10 parts of a dispersant (acrylate polymer dispersant), 0.5 to 1 part of a thickener (polyurethane associative thickener), and 1 to 2 parts of a fungicide (cypermethrin).

[0050] Among them, the coloring dyes include, by weight: 5 to 12 parts of titanium dioxide slurry, 5 to 12 parts of iron yellow slurry, 0.5 to 0.75 parts of iron infrared slurry, and 25 to 35 parts of low emissivity slurry.

[0051] The mass ratio of the low-emissivity loess paint formula is: titanium dioxide slurry: iron yellow slurry: iron infrared slurry: low-emissivity color slurry is 10:10:0.75:30.

[0052] The specific preparation method is as follows:

[0053] Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer, and use an ultrasonic machine to clean for 30 minutes to prepare defatted aluminum powder; the mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer is 80:10:5:5:800:20;

[0054] Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:500, and then uniformly mixing, stirring speed is 600r / min, stirring time is 4h, during which chromium chloride hexahydrate is added dropwise at a speed of 20ml / h for 50min, and then filtered and dried to obtain composite particles of chromium hydroxide coated flaky aluminum powder;

[0055] Step 3, placing the composite particles in a muffle furnace, calcining for 5 hours with nitrogen, and setting the temperature to 300° C. to obtain a colored aluminum powder low-emissivity pigment;

[0056] Step 4, mixing the low emissivity pigment, the coloring dye and the water-soluble resin, wherein the mass ratio of the aluminum powder low emissivity pigment, the coloring dye and the water-soluble resin is 2:2:3, and stirring at 60 r / min for 2 hours to obtain a mixture;

[0057] Step 5: Add a dispersant, a thickener and a bactericide into the mixture in a weight ratio of 5:1:2 to obtain a loess-colored camouflage paint.

[0058] This paint is loess color and is mainly suitable for ground backgrounds such as soil, sand and gravel. It has high reflection of visible light and near-infrared, and has high infrared radiation intensity within one sunlight cycle.

[0059] Example 2

[0060] This embodiment provides a medium green infrared stealth coating, which includes, by weight: 10-15 parts of water-soluble resin (epoxy resin), 60-75 parts of coloring dye, 25-30 parts of low-emissivity slurry, 5-10 parts of dispersant (polyurethane polymer dispersant), 0.5-1 parts of thickener (polyurethane associative thickener), and 1-2 parts of fungicide (cypermethrin).

[0061] The coloring dyes include, by weight: 15 to 25 parts of perylene black paste, 30 to 50 parts of iron yellow paste, 3 to 10 parts of 2600K paste, and 25 to 35 parts of low-emissivity paste.

[0062] Preferably, the formula ratio of the low emissivity medium green coating is 20:40:5:30 of perylene black slurry: iron yellow slurry: 2600K slurry: low emissivity slurry.

[0063] The specific preparation method is as follows:

[0064] Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer, and use an ultrasonic machine to clean for 30 minutes to prepare defatted aluminum powder; the mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer is 80:10:5:5:800:20;

[0065] Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:500, and then uniformly mixing, stirring speed is 700r / min, stirring time is 3h, during which chromium chloride hexahydrate is added dropwise at a speed of 30ml / h for 50min, and then filtered and dried to obtain composite particles of chromium hydroxide coated flaky aluminum powder;

[0066] Step 3, placing the composite particles in a muffle furnace, calcining for 5 hours with nitrogen, and setting the temperature to 300° C. to obtain a colored aluminum powder low-emissivity pigment;

[0067] Step 4, mixing aluminum powder low emissivity pigment, coloring dye and water-soluble resin, wherein the mass ratio of aluminum powder low emissivity pigment, coloring dye and water-soluble resin is 1:6:3, and stirring at 60-100 r / min for 1-2 hours to obtain a mixture;

[0068] Step 5: Add dispersant, thickener and fungicide into the mixture in a weight ratio of 8:2:3 to obtain a medium green camouflage paint.

[0069] This paint is medium green in color and is mainly suitable for ground backgrounds such as low plants. It has a low visible light emissivity, a high near-infrared reflection, and a low infrared radiation intensity within a sunlight cycle.

[0070] Example 3

[0071] This embodiment provides a yellow-green infrared stealth coating, which includes, by weight: 10-15 parts of water-soluble resin (acrylic resin), 55-75 parts of coloring dye, 5-15 parts of low-emissivity slurry, 5-10 parts of dispersant (polyester polymer dispersant), 0.5-1 part of thickener (polyurethane associative thickener), and 1-2 parts of fungicide (cypermethrin).

[0072] The coloring dyes include, by weight: 10 to 20 parts of perylene black slurry, 30 to 50 parts of iron yellow slurry, 3 to 10 parts of brown slurry, and 5 to 15 parts of low emissivity slurry.

[0073] Preferably, the ratio of the low emissivity yellow-green coating formula is 15:40:6:10 of perylene black slurry: iron yellow slurry: brown slurry: low emissivity slurry.

[0074] The specific preparation method is as follows:

[0075] Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer, and use an ultrasonic machine to clean for 30 minutes to prepare defatted aluminum powder; the mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer is 80:10:5:5:800:20;

[0076] Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:500, and then uniformly mixing, stirring speed is 800r / min, stirring time is 3h, during which chromium chloride hexahydrate is added dropwise at a speed of 40ml / h for 50min, and then filtered and dried to obtain composite particles of chromium hydroxide coated flaky aluminum powder;

[0077] Step 3, placing the composite particles in a muffle furnace, calcining for 5 hours with nitrogen, and setting the temperature to 300° C. to obtain a colored aluminum powder low-emissivity pigment;

[0078] Step 4, mixing aluminum powder low emissivity pigment, coloring dye and water-soluble resin, wherein the mass ratio of aluminum powder low emissivity pigment, coloring dye and water-soluble resin is 1:6:1, and stirring at 100 r / min for 1 hour to obtain a mixture;

[0079] Step 5: Add a dispersant, a thickener and a bactericide into the mixture in a weight ratio of 10:2:4 to obtain a yellow-green camouflage paint.

[0080] This paint is yellow-green in color and is mainly suitable for ground backgrounds such as tender green vegetation. It has a low visible light emissivity, a high near-infrared reflection, and a low infrared radiation intensity within a sunlight cycle.

[0081] Example 4

[0082] This embodiment provides a dark green infrared stealth coating, which includes the following components by weight: 10-15 parts of water-soluble resin (polyurethane resin), 25-35 parts of coloring dye, 5-10 parts of low-emissivity slurry, 5-10 parts of dispersant (acrylate polymer dispersant), 0.5-1 part of thickener (polyurethane associative thickener), and 1-2 parts of fungicide (cypermethrin).

[0083] The coloring dyes include, by weight: 20 to 30 parts of perylene black slurry, 8 to 15 parts of iron yellow slurry, 15 to 30 parts of brown slurry, and 8 to 20 parts of low emissivity slurry.

[0084] Preferably, the ratio of perylene black slurry: iron yellow slurry: brown slurry: low emissivity slurry in the low emissivity dark green coating formula is 15:5:9:5.

[0085] The specific preparation method is as follows:

[0086] Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer, and use an ultrasonic machine to clean for 30 minutes to prepare defatted aluminum powder; the mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoamer is 80:10:5:5:800:20;

[0087] Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:500, and then uniformly mixing, stirring speed is 800r / min, stirring time is 3h, during which chromium chloride hexahydrate is added dropwise at a speed of 40ml / h for 50min, and then filtered and dried to obtain composite particles of chromium hydroxide coated flaky aluminum powder;

[0088] Step 3, placing the composite particles in a muffle furnace, calcining for 5 hours with nitrogen, and setting the temperature to 300° C. to obtain a colored aluminum powder low-emissivity pigment;

[0089] Step 4, mixing aluminum powder low emissivity pigment, coloring dye and water-soluble resin, wherein the mass ratio of aluminum powder low emissivity pigment, coloring dye and water-soluble resin is 2:6:1, stirring at 80 r / min for 1.5 hours to obtain a mixture;

[0090] Step 5: Add dispersant, thickener and fungicide into the mixture in a weight ratio of 10:1:2 to obtain a dark green camouflage paint.

[0091] This paint is dark green in color and is mainly suitable for ground backgrounds such as trees and vegetation. It has a low visible light emissivity, a high near-infrared reflection, and a low infrared radiation intensity within a sunlight cycle.

[0092] The present invention imitates the color characteristics of the natural environment and the infrared emission background characteristics from the spectral aspect, and realizes multi-spectral camouflage by detecting the visible light-far infrared multi-spectrum which is highly consistent with the visible light and far infrared spectra of typical plants and land in nature.

[0093] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0094] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A camouflage coating compatible with visible light and far infrared, characterized in that: The following components are included by weight: 10-15 parts of water-soluble resin, 20-95 parts of coloring dye, 5-35 parts of low-emissivity slurry, 5-10 parts of dispersant, 0.5-1 parts of thickener, and 1-2 parts of bactericide; The coloring dye includes several of titanium white paste, iron yellow paste, iron red paste, perylene black paste, 2600K paste, and brown paste; The key component of the low emissivity slurry is aluminum powder.

2. The camouflage paint according to claim 1, characterized in that: The water-soluble resin includes, but is not limited to, any one or more of polyurethane resin, epoxy resin, and acrylic resin.

3. The camouflage paint according to claim 1, characterized in that: The dispersant is a polymer type super dispersant, the thickener is an associative thickener, and the bactericide is a triazine bactericide.

4. The method for preparing the visible light and far infrared compatible camouflage coating according to any one of claims 1 to 3, characterized in that: The specific steps include: Step 1, uniformly mix aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and a defoamer, and clean them with an ultrasonic machine for 20-50 minutes to prepare defatted aluminum powder; Step 2, weighing a certain amount of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water respectively, then uniformly mixing and stirring for a certain period of time, during which chromium chloride hexahydrate is added dropwise at a rate of 20 to 40 ml / h for 50 minutes, and then filtering and drying to obtain composite particles of chromium hydroxide-coated flaky aluminum powder; Step 3, placing the composite particles in a muffle furnace, calcining for 4-6 hours with nitrogen, and setting the temperature to 200-400° C. to obtain a colored aluminum powder low-emissivity pigment; Step 4, mixing the aluminum powder low-emissivity pigment, the coloring dye and the water-soluble resin, stirring at 60-100 r / min for 1-2 hours to obtain a mixture; Step 5: Add a dispersant, a thickener and a fungicide to the mixture to obtain a camouflage coating.

5. The preparation method according to claim 4, characterized in that: The mass ratio of the aluminum powder, sodium silicate, sodium dodecylbenzene sulfonate, water and defoaming agent described in step 1 is 80:10:5:5:800:

20.

6. The preparation method according to claim 4, characterized in that: In step 2, the stirring speed is 600-800 r / min, and the stirring time is 3-4 h.

7. The preparation method according to claim 4, characterized in that: In step 2, the mass ratio of defatted aluminum powder, ammonia water, polyvinyl pyrrolidone and water is 30:50:5:

500.

8. The preparation method according to claim 4, characterized in that: In step 4, the mass ratio of the aluminum powder low-emissivity pigment, the coloring dye, and the water-soluble resin is 3:18:

2.

9. The preparation method according to claim 4, characterized in that: In step 5, the mass ratio of the mixture of the dispersant, the thickener and the bactericide is 5-10:1-2:2-4.

10. The application of the visible light and far infrared compatible camouflage paint according to any one of claims 1 to 3, characterized in that: The camouflage paint compatible with visible light and far infrared is applied to the outer surface of the support shelter, and the coating thickness is less than 60 μm.

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