CN115895450A - High-weather-resistance optical infrared compatible camouflage coating and preparation method thereof - Google Patents
High-weather-resistance optical infrared compatible camouflage coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an optical infrared compatible camouflage coating with high weather resistance, which comprises a component A and a component B, wherein the component A comprises the following components in parts by mass (5-8): 1: 20-40 parts of a film-forming substance: 10-28 parts of high weather-resistant filler: 10-23 parts of optical camouflage pigment: 5-18 parts of infrared camouflage pigment: 5-20 parts of diluent: 0.5-5 parts of auxiliary agent; the film forming matter comprises at least one of organic fluororesin, epoxy modified acrylic resin, organic silicon modified acrylic resin and hydroxyl acrylic resin; the high weather-resistant filler comprises at least one of zinc phosphate, zinc powder, mica iron oxide and glass flakes; the infrared camouflage pigment comprises at least one of nano ITO powder, nano ATO powder, aluminum powder and nickel powder. The product of the invention can solve the problem that the traditional coating can be sprayed by multiple layers to solve the compatibility of weather resistance and optical infrared camouflage only by one layer.
Description
Technical Field
The invention relates to the technical field of multifunctional camouflage paint, in particular to a preparation method of optical infrared compatible camouflage paint with high weather resistance.
Background
In recent years, with the rapid development of science and technology, camouflage coatings are continuously developed, the technical indexes are higher and higher, and the practicability requirement is higher and higher.
The traditional coating generally meets the requirement of weather resistance through a plurality of layers of primer epoxy zinc-rich, intermediate epoxy mica iron and finish paint, the primer and the intermediate paint mainly provide good weather resistance, and the finish paint provides optical infrared camouflage performance; the traditional vehicle camouflage paint is difficult to meet the camouflage requirement of a green typical background, and because the lightness of the traditional vehicle camouflage paint is low, the far infrared emissivity cannot be adjusted within the range of 0.6-0.95, the traditional vehicle camouflage paint cannot meet the camouflage requirements of optical, infrared and middle and far infrared in 3-color or 4-color camouflage colors under the background at the same time, and cannot realize thermal camouflage color segmentation of the middle and far infrared.
Obviously, the traditional camouflage paint for vehicles cannot meet the use requirement of future wars, more and more scientific research institutions begin to search for solutions in other new materials, in the traditional process, aluminum powder is a component frequently used in the development of camouflage paints and sometimes even is used as a key for solving the problem of low emissivity, but the lightness of the aluminum powder is very high, and the lightness of green camouflage color in relevant national military standards is low, so that the camouflage paint prepared by using the common aluminum powder is difficult to be compatible with visible light camouflage and middle and far infrared camouflage reconnaissance.
Disclosure of Invention
The invention aims to provide an optical infrared compatible camouflage coating with high weather resistance, a preparation method thereof and a camouflage coating.
The technical scheme of the invention is that the optical infrared compatible camouflage coating with high weather resistance comprises a component A and a component B, wherein the component A comprises a film forming substance, a high weather-resistant filler, an optical camouflage pigment, an infrared camouflage pigment, a diluent and an auxiliary agent; the component B is a curing agent; the infrared camouflage pigment is at least one of nano ITO powder, nano ATO powder, coated aluminum powder and nickel powder; the high weather-resistant filler is at least one of zinc phosphate, zinc powder, mica iron oxide and glass flakes.
Further, the mass ratio of the film forming substance, the high weather-resistant filler, the optical camouflage pigment, the infrared camouflage pigment, the diluent and the auxiliary agent in the component A is as follows: (20-40): (10-28): (10-23): (5-18): (5-20): (0.5-5); the component B is a curing agent, and the mass ratio of the component A to the component B is (5-8) to 1.
Further, the film-forming substance is at least one of an organic fluororesin, an epoxy-modified acrylic resin, an organosilicon-modified acrylic resin, and a hydroxy acrylic resin.
Further, the optical camouflage pigment is at least one of nano titanium white, scarlet, red iron oxide, cobalt oxide blue, cobalt oxide green, perylene black, titanium yellow and medium chrome yellow.
Further, the diluent is at least one of xylene, butyl ester, ethanol, 120# solvent oil and DMF.
Further, the auxiliary agent is at least one of a dispersing agent, a defoaming agent, a leveling agent, an anti-settling agent, a salt spray resistant auxiliary agent and an ultraviolet aging auxiliary agent.
Further, the curing agent of the component B is one of N75, L75, N3390 and HT-100.
The invention also provides a preparation method of the high-weather-resistance optical infrared compatible camouflage coating, which comprises the following steps:
s1: weighing the film forming substance, a part of the diluent and the auxiliary agent, adding into a grinding cylinder, and dispersing at high speed for 10-15min;
s2: weighing the high weather-resistant filler and the optical camouflage pigment, adding the high weather-resistant filler and the optical camouflage pigment into the grinding cylinder of S1, and dispersing at a high speed for 10-15min;
s3: weighing the infrared camouflage pigment, placing the infrared camouflage pigment in another small grinding cylinder, adding another part of diluent for pre-dispersion for 3-5min, completely scattering the infrared camouflage pigment, then adding the infrared camouflage pigment into the grinding cylinder of S1, and dispersing at a high speed for 10-15min;
s4: grinding the dispersed slurry by using a nano sand mill, wherein the particle size of a grinding ball is 0.6-1.0mm, the grinding speed is 800-1200r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint coarse material;
s5: grinding the coarse camouflage paint prepared in the step S4 again by using a nano sand mill, wherein the grain diameter of grinding balls is 0.3-0.5mm, the grinding speed is 1000-1500r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint component A with the fineness of about 300-600 nm;
s6: mixing the component A and the component B in proportion.
The invention also provides a camouflage coating which is obtained by spraying the optical infrared compatible camouflage coating with high weather resistance on the surface of a target at a single time, wherein the spraying thickness is 120-160 mu m, and the sprayed coating is baked in an oven at 80-100 ℃ for 30-50min to be completely cured to form the camouflage coating.
Furthermore, the camouflage coating has ultraviolet resistance of more than 2000h; the coating does not foam, crack or fall off after the salt spray resistance is more than 2000h; the color difference between the optical camouflage color and the typical background is less than or equal to 3L a b; the near-infrared brightness contrast is less than 0.2; the emissivity of the middle and far infrared rays is 3-5 mu m and 8-14 mu m is in the range of 0.6-0.95, and the emissivity is adjustable.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts at least one of organic fluorine resin, epoxy modified acrylic resin, organic silicon modified acrylic resin, hydroxyl acrylic resin and the like as a film forming substance, and perfectly solves the problems of service life and weather resistance of the traditional coating at present by adding high weather resistance filler and auxiliary agent. At present, a plurality of weather-resistant coatings are reported, and the existing weather-resistant coatings basically meet the use requirements in common outdoor environments, but have some defects. For example, a paint film is easy to crack after being irradiated by ultraviolet rays for a certain time, the paint film has poor adhesive force, is exposed outdoors for a long time, and has unsatisfactory cold and hot alternation resistance, corrosion resistance and other properties, so that the whole weather resistance and the service life of the paint film are limited.
2. The high-weather-resistance camouflage coating can solve the problem that the traditional coating is sprayed by multiple layers to solve the compatibility of weather resistance and optical infrared camouflage only by one layer, and the traditional coating is difficult to realize the compatibility of weather resistance and optical infrared camouflage.
3. According to the production process of the high-weather-resistance camouflage paint, the addition sequence of the raw materials in the steps S1 and S2 can enable the pigment and filler to be well wetted and dispersed in the paint, pre-dispersion of the infrared pigment can also be well wetted and dispersed on the infrared pigment, so that the prepared paint is more uniform in color and free of floating and other phenomena, graded grinding is used in the grinding process, grinding balls with large particle sizes are used firstly, and then grinding balls with small particle sizes are used, so that the prepared paint is lower in particle size and can reach the nanoscale, the compactness of a coating prepared from the paint is better, and the coating has better weather resistance.
4. The camouflage coating formed by spraying the high-weather-resistance camouflage paint in one time has the following performance advantages: the ultraviolet resistance is more than 2000h, the salt spray resistance is more than 2000h, the coating does not bubble, crack or fall off, the physical and mechanical properties are excellent, the color difference between the optical camouflage color and the typical background is less than or equal to 3L a b, the near infrared brightness contrast is less than 0.2, the emissivity of the middle and far infrared is 3-5 mu m and 8-14 mu m, and the emissivity is adjustable in high, middle and low emissivity at 0.6-0.95.
Drawings
These and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a camouflage effect picture of a camouflage net obtained by spraying the coating obtained in the embodiment 1-3 of the invention, wherein (a) is an optical camouflage effect picture and (b) is a middle and far infrared camouflage effect picture;
FIG. 2 is a spectrum curve of the coating obtained in example 1 of the present invention;
FIG. 3 is a spectrum curve of a coating obtained in example 2 of the present invention;
FIG. 4 is a spectrum curve of a paint obtained in example 3 of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention is provided in conjunction with the accompanying drawings and the detailed description of the invention.
Example 1
A preparation method of a low-emissivity sandy soil color high-weatherability optical infrared compatible camouflage coating comprises the following steps: glass flake: (nanometer titanium dioxide + perylene black + titanium yellow + scarlet + cobalt oxide green + cobalt oxide blue): aluminum powder: (xylene and butyl ester): the mass ratio of the dispersing agent to the defoaming agent to the ultraviolet aging auxiliary agent to the salt spray resistant auxiliary agent is as follows: 35:18:17:13:5:5.
the specific preparation method comprises the following steps:
s1, weighing raw material components of organic fluororesin, partial mixture of dimethylbenzene and butyl ester, dispersing agent, defoaming agent, ultraviolet aging auxiliary agent and salt spray resistant auxiliary agent, adding the raw material components into a grinding cylinder, and dispersing for 10min at high speed;
s2: weighing glass flakes, nano titanium white, perylene black, titanium yellow, scarlet, cobalt oxide green and cobalt oxide blue, adding into a grinding cylinder of S1, and dispersing at high speed for 12min;
s3: weighing aluminum powder pigment, using another small-sized pulling cylinder, adding the rest xylene and butyl ester mixture diluent for pre-dispersion for 5min, completely opening the infrared camouflage pigment, then adding the infrared camouflage pigment into the grinding cylinder of S1, and dispersing at high speed for 12min;
s4: grinding the dispersed slurry by using a nano sand mill, wherein the particle size of a grinding ball is 0.6-1.0mm, the grinding speed is 1000r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint coarse material;
s5: grinding the camouflage paint prepared in the step S4 again by using a nano sand mill, wherein the grain diameter of grinding balls is 0.3-0.5mm, the grinding speed is 1500r/min, and the grinding time is 2-3h, so that a camouflage paint component A with the fineness of about 600nm is prepared;
s6: the component A and the component B (N3390) are mixed according to the ratio of 6.
The results are shown in Table 1, along with the spectral reflectance curves from 350 to 1400nm, as shown in FIG. 2. Tests prove that the testing parameters of the dark green camouflage paint obtained in the embodiment completely meet the requirements of the sand color (SE 2635) in the relevant national military standard on L a b value, visible light brightness contrast, near infrared brightness contrast, infrared emissivity and the like. The ultraviolet aging performance and the salt spray resistance are both more than 2000h, and the coating does not crack, bubble or fall off.
Example 2
The preparation method of the medium-emissivity, green and high-weatherability optical infrared-compatible camouflage coating comprises the following steps: glass flake: (perylene black + titanium yellow + scarlet + cobalt oxide green + cobalt oxide blue): nano ITO powder: (xylene and butyl ester): the mass ratio of the dispersing agent to the defoaming agent to the ultraviolet aging auxiliary agent to the salt spray resistant auxiliary agent is as follows: 40:10:23:18:10:2.3.
the specific preparation method comprises the following steps:
s1, weighing raw material components of organic fluororesin, a part of mixture of dimethylbenzene and butyl ester, a dispersing agent, a defoaming agent, an ultraviolet aging aid and a salt spray resistant aid, adding the raw material components into a grinding cylinder, and dispersing for 15min at a high speed;
s2: weighing glass flakes, cobalt oxide green, cobalt oxide blue, perylene black, titanium yellow and scarlet, adding into a grinding cylinder of S1, and dispersing for 15min at a high speed;
s3: weighing the nano ITO pigment, using another small-sized pulling cylinder, adding the rest mixture diluent of xylene and butyl ester for pre-dispersion for 5min, completely opening the infrared camouflage pigment, then adding the infrared camouflage pigment into the grinding cylinder of S1, and dispersing at high speed for 15min;
s4: grinding the dispersed slurry by using a nano sand mill, wherein the particle size of a grinding ball is 0.6-1.0mm, the grinding speed is 1000r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint coarse material;
s5: grinding the camouflage paint prepared in the step S4 by using a nano sand mill again, wherein the grain diameter of grinding balls is 0.3-0.5mm, the grinding speed is 1500r/min, and the grinding time is 2-3h, so that the camouflage paint component A with the fineness of about 300nm is prepared;
s6: the component A and the component B (N3390) are mixed according to the proportion of 5, and then the mixture is sprayed on a steel plate or a tinplate to test weather resistance, physical and mechanical properties and camouflage performance.
The test results are shown in Table 1, along with the spectral reflectance curves from 350 to 1400nm, as shown in FIG. 3. Tests prove that the testing parameters of the dark green camouflage paint obtained in the embodiment completely meet the requirements of L a b value, visible light brightness contrast, near infrared brightness contrast, infrared emissivity and the like required by the medium green color (MG 1151) in the relevant national military standard. The ultraviolet aging performance and the salt spray resistance are both more than 2000h, and the coating does not crack, bubble or fall off.
Example 3
A preparation method of a high-emissivity dark green high-weatherability optical infrared compatible camouflage paint comprises the following steps: zinc phosphate: (nanometer titanium white + perylene black + titanium yellow): nano ATO powder: (xylene and butyl ester): the mass ratio of the dispersing agent to the defoaming agent to the ultraviolet aging auxiliary agent to the salt spray resistant auxiliary agent is as follows: 20:28:10:5:20:0.5.
the specific preparation method comprises the following steps:
s1, weighing raw material components of organic fluororesin, partial mixture of dimethylbenzene and butyl ester, dispersing agent, defoaming agent, ultraviolet aging aid and salt spray resistant aid, adding the raw material components into a grinding cylinder, and dispersing for 10min at high speed;
s2: weighing zinc phosphate, nano titanium white, perylene black and titanium yellow, adding into the grinding cylinder of S1, and dispersing at high speed for 10min;
s3: weighing the nano ATO pigment, adding the rest xylene and butyl ester mixture diluent into another small-sized pulling cylinder for pre-dispersion for 5min, completely opening the infrared camouflage pigment, adding the infrared camouflage pigment into the grinding cylinder of S1, and dispersing at high speed for 15min;
s4: grinding the dispersed slurry by using a nano sand mill, wherein the particle size of a grinding ball is 0.6-1.0mm, the grinding speed is 1000r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint coarse material;
s5: grinding the camouflage paint prepared in the step S4 again by using a nano sand mill, wherein the grain diameter of grinding balls is 0.3-0.5mm, the grinding speed is 1500r/min, and the grinding time is 2-3h, so that a camouflage paint component A with the fineness of about 300nm is prepared;
s6: the component A and the component B (N3390) are mixed according to the proportion of 8, and then the mixture is sprayed on a steel plate or a tinplate to test weather resistance, physical and mechanical properties and camouflage performance.
The test results are shown in Table 1, along with the spectral reflectance curves from 350 to 1400nm, as shown in FIG. 4. Tests prove that the testing parameters of the dark green camouflage paint obtained in the embodiment completely meet the requirements of the relevant national military standard medium dark green (DG 0847) on the L a b value, the visible light brightness contrast, the near infrared brightness contrast, the infrared emissivity and the like. The ultraviolet aging performance and the salt spray resistance are both more than 2000h, and the coating does not crack, bubble or fall off.
TABLE 1 Table of the optical, infrared, weather resistance and physico-mechanical properties of the coatings obtained in the examples of the invention
After the optical and infrared characteristic images of a typical ground object background are processed, the main distribution characteristics of the images are used as the basis of camouflage design, the camouflage paint obtained in the embodiment 1-3 is sprayed on a fabric or a film, and a camouflage net is obtained after processing, wherein the camouflage effect graph is shown in figure 1.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The high-weather-resistance optical infrared compatible camouflage coating is characterized by comprising a component A and a component B, wherein the component A comprises a film forming substance, a high-weather-resistance filler, an optical camouflage pigment, an infrared camouflage pigment, a diluent and an auxiliary agent; the component B is a curing agent;
the infrared camouflage pigment is at least one of nano ITO powder, nano ATO powder, coated aluminum powder and nickel powder;
the high weather-resistant filler is at least one of zinc phosphate, zinc powder, mica iron oxide and glass flakes.
2. The high weather resistant optical infrared compatible camouflage coating as claimed in claim 1, wherein the mass ratio of film forming materials, high weather resistant filler, optical camouflage pigment, infrared camouflage pigment, diluent and auxiliary agent in the component A is as follows: (20-40): (10-28): (10-23): (5-18): (5-20): (0.5-5); the mass ratio of the component A to the component B is (5-8) to 1.
3. The highly weatherable optical infrared compatible camouflage paint according to claim 1, wherein said film forming substance comprises at least one of an organic fluorine resin, an epoxy modified acrylic resin, a silicone modified acrylic resin, and a hydroxyl acrylic resin.
4. The highly weatherable optical infrared compatible camouflage coating according to claim 1, wherein said optical camouflage pigment comprises at least one of nano titanium white, scarlet, red iron oxide, cobalt oxide blue, cobalt oxide green, perylene black, titanium yellow, and chrome yellow.
5. The highly weatherable optical infrared compatible camouflage paint according to claim 1, wherein said diluent comprises at least one of xylene, butyl ester, ethanol, 120# solvent oil and DMF.
6. The highly weatherable optically-infrared compatible camouflage paint according to claim 1, wherein said additives comprise at least one of a dispersant, a defoamer, a leveling agent, an anti-settling agent, a salt spray resistant additive and an ultraviolet aging additive.
7. The highly weatherable optical infrared compatible camouflage paint according to claim 1, wherein said component B curing agent comprises one of N75, L75, N3390 and HT-100.
8. The method for preparing the high weatherability optical infrared compatible camouflage paint according to any one of claims 1 to 7, comprising the steps of:
s1: weighing the film forming substance, a part of the diluent and the auxiliary agent, adding into a grinding cylinder, and dispersing at high speed for 10-15min;
s2: weighing the high weather-resistant filler and the optical camouflage pigment, adding the high weather-resistant filler and the optical camouflage pigment into the grinding cylinder of S1, and dispersing at a high speed for 10-15min;
s3: weighing the infrared camouflage pigment, placing the infrared camouflage pigment in another small grinding cylinder, adding another part of diluent for pre-dispersion for 3-5min, completely scattering the infrared camouflage pigment, then adding the infrared camouflage pigment into the grinding cylinder of S1, and dispersing at high speed for 10-15min;
s4: grinding the dispersed slurry by using a nano sand mill, wherein the particle size of a grinding ball is 0.6-1.0mm, the grinding speed is 800-1200r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint coarse material;
s5: grinding the coarse camouflage paint prepared in the step S4 again by using a nano sand mill, wherein the grain diameter of grinding balls is 0.3-0.5mm, the grinding speed is 1000-1500r/min, and the grinding time is 2-3h, so as to prepare a camouflage paint component A with the fineness within the range of 300-600 nm;
s6: mixing the component A and the component B in proportion.
9. A camouflage coating, which is obtained by spraying the high weather resistant optical infrared compatible camouflage paint as claimed in any one of claims 1 to 7 on the surface of a target in a single time, wherein the spraying thickness is 120 to 160 μm, and after the spraying, the coating is completely cured by baking in an oven at 80 to 100 ℃ for 30 to 50min to form the camouflage coating.
10. The camouflage coating of claim 9, wherein said camouflage coating exhibits the following properties: the ultraviolet resistance is more than 2000h; the coating does not foam, crack or fall off after the salt spray resistance is more than 2000h; the color aberration of the optical camouflage color and a typical background is less than or equal to 3L a b, the near infrared brightness contrast is less than 0.2, the emissivity of middle and far infrared wave bands of 3-5 mu m and 8-14 mu m is in the range of 0.6-0.95, and the emissivity is adjustable.
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| CN116751486A (en) * | 2023-07-26 | 2023-09-15 | 石家庄市油漆厂 | Durable green paint and preparation method thereof |
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