CN115895422A - Multifunctional protective adhesive for green camouflage coating and preparation method and application thereof - Google Patents
Multifunctional protective adhesive for green camouflage coating and preparation method and application thereof Download PDFInfo
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- CN115895422A CN115895422A CN202211463435.0A CN202211463435A CN115895422A CN 115895422 A CN115895422 A CN 115895422A CN 202211463435 A CN202211463435 A CN 202211463435A CN 115895422 A CN115895422 A CN 115895422A
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Abstract
The invention provides a multifunctional protective adhesive of a green camouflage coating, a preparation method and an application thereof, wherein the protective adhesive comprises the following raw material components: the coating comprises resin, nano silicon oxide powder, PE wax powder, an ultraviolet aging auxiliary agent, a light stabilizer, a dispersing agent, a solvent and a cross-linking agent, wherein the mass ratio of the components is (50-70): (3-10): (2-5): (1-5): (0.5-2): (0.3-1): (15-30): (5-10). Wherein the resin is aliphatic polyurethane resin or hydroxy acrylic resin with hydroxyl value of 80-120; the average grain diameter of the nano silicon oxide powder is 10nm-60nm, and the refractive index of visible light is 1.38; the PE wax powder is polyethylene micro-powder wax with average particle size of 5-8 μm and Tg of 90-140 deg.C. The multifunctional protective adhesive of the green camouflage coating is coated on the surface of the green camouflage coating, so that the visible light reflectivity can be reduced on the premise of not influencing the near infrared reflectivity of the green camouflage coating, and the problem of blending of the camouflage performance of the green camouflage color with relatively low lightness is solved.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a multifunctional protective adhesive for a green camouflage coating, and a preparation method and application thereof.
Background
With the rapid development of electronic information technology and the wide application thereof in the field of national defense, reconnaissance technology has realized high technology, so that various countries have higher requirements on camouflage stealth technology, wherein the camouflage paint has an important position in camouflage due to the advantages of convenient manufacture, low cost, firmness, durability, convenient construction and the like.
The green camouflage coating is mainly used for simulating green plants in a background, the reflectivity of the green camouflage coating in visible light and near infrared bands is similar to that of the green plants in the bands, the color brightness requirements of various green coatings in the relevant national military standard are low (the color brightness of green camouflage colors such as DG0847, YG1357, MG1151 and the like can be known from GJB1082A-2021 and the like is relatively low), and most of inorganic pigments for camouflage have relatively high brightness and are not enough to prepare the green camouflage coating with the color and the near infrared reflectivity meeting the camouflage requirements.
In the current stage, when the green camouflage color is modulated, low-brightness organic pigment is mostly adopted or a method of increasing the pigment quantity and reducing the resin content is adopted to reduce the brightness, but the green camouflage color modulated by the method has poor camouflage performance due to larger difference between the near infrared reflectivity and the green plant, or the prepared coating has poor mechanical property and no practicability.
Disclosure of Invention
In view of the above, the invention provides a multifunctional protective adhesive for a green camouflage coating, and a preparation method and application thereof.
The technical scheme adopted by the invention is as follows: a multifunctional protective adhesive for a green camouflage coating comprises the following raw material components: the coating comprises resin, PE wax powder, nano silicon oxide powder, an auxiliary agent, a solvent and a cross-linking agent, wherein the auxiliary agent comprises an ultraviolet absorbent, a light stabilizer and a dispersing agent.
Further, the raw material components are a component a and a component b, wherein the component a and the component b respectively comprise the following components in parts by mass:
a component a:
50-70 parts of resin;
3-10 parts of nanoscale silicon oxide;
2-5 parts of PE wax powder;
1-5 parts of ultraviolet absorbent;
0.5-2 parts of light stabilizer;
0.3-1 part of dispersant;
15-30 parts of solvent;
and b, component:
5-10 parts of a cross-linking agent.
Further, the resin is aliphatic polyurethane resin or hydroxy acrylic resin with hydroxyl value of 80-120. The aliphatic polyurethane resin has good flexibility, adhesion, aging resistance and excellent high and low temperature resistance, is suitable for a green camouflage coating protective layer for a camouflage net, and the coating film of the medium and high hydroxyl value hydroxy acrylic resin crosslinked with the aliphatic polyisocyanate curing agent has strong adhesion and good aging resistance, and is suitable for a green camouflage coating for a vehicle.
Further, the nano-silica has an average particle diameter of 10nm to 60nm and a refractive index of visible light of 1.38. The nano silica powder is of a nano porous structure, the porosity of the nano silica powder is larger than 50%, the visible light refractive index of the multifunctional protective layer prepared by adopting the nano silica powder is 1.58, the visible light refractive index of the green camouflage coating is 2.0-2.3, the visible light refractive index of air is 1.0, the multifunctional protective layer solves the problem that the optical mismatch is caused by large difference of the visible light refractive indexes between media, so that the light loss is caused, the visible light integral reflectivity of the green camouflage coating is reduced, the light loss is reduced, the light absorption is increased, the brightness of the green camouflage coating is reduced, and the influence of the multifunctional protective layer on the near infrared reflectivity is small and is not enough to change the near infrared camouflage performance.
Further, the PE wax powder is polyethylene micro-powder wax, the average particle size is 5-8 μm, and the Tg is 90-140 ℃. The PE wax powder can float to the surface of the coating in the drying process of the protective layer, so that the dynamic friction coefficient of the surface of the coating is greatly reduced, and the friction resistance of the coating is improved.
Further, the ultraviolet absorbent is at least one of UV326, UV328 and UV234, and can absorb ultraviolet rays in sunlight to improve the aging performance of the coating; the light stabilizer is at least one of UV292 and UV531, and can capture free radicals generated by polymers due to ultraviolet irradiation so as to terminate the degradation reaction of the coating and improve the ultraviolet aging resistance; the dispersant is at least one of byk103 and byk163, and can be adsorbed on the surfaces of nano silicon oxide and PE wax powder particles to prevent the particles from aggregating.
Furthermore, the solvent is at least one of cyclohexanone, DMF and n-butyl ester, and can reduce the viscosity of the system.
Furthermore, the cross-linking agent is aziridine or polyisocyanate, and the cross-linking reaction is carried out between the aziridine or the polyisocyanate and the resin, so that the compactness, the aging resistance and the adhesive force of the coating are improved.
The invention also provides a preparation method of the multifunctional protective adhesive of the green camouflage coating, which comprises the following steps:
s1: weighing raw materials of the multifunctional protective adhesive of the green camouflage coating according to a formula;
s2: and (2) dispersing the slurry prepared in the step (S1) on a high-speed dispersion machine at 1500r/min until the fineness is lower than 15 mu m to obtain the multifunctional protective adhesive for the green camouflage coating.
The invention also provides application of the multifunctional protective adhesive of the green camouflage coating, which is coated on the surface of the cured green camouflage coating to form a protective layer.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the multifunctional protective layer of the green camouflage coating prepared by the invention is added with the low visible light refractive index material nano silica powder, the visible light refractive index of the nano silica powder is 1.58, the problem of optical mismatch caused by large refractive index difference between air and the green camouflage coating is solved, the visible light reflectivity of the green camouflage coating can be reduced under the condition of not influencing near infrared spectrum, and the green camouflage color with low lightness in the national military standard is easy to allocate.
2. The PE wax powder contained in the multifunctional protective layer of the green camouflage coating prepared by the invention can float to the surface of the coating in the drying process of the protective layer, so that the dynamic friction coefficient of the surface of the coating is greatly reduced, and the friction resistance of the coating is improved.
3. The ultraviolet absorbent and the light stabilizer contained in the multifunctional protective layer of the green camouflage coating prepared by the invention can absorb ultraviolet rays in sunlight and capture free radicals of polymers generated by ultraviolet irradiation, and the ultraviolet aging resistance of the coating is greatly improved due to the synergistic effect of the ultraviolet absorbent and the light stabilizer when the ultraviolet absorbent and the light stabilizer are added together.
The preparation method provided by the invention has simple process, is suitable for mass production and has low price.
Drawings
FIG. 1 is a graph of the spectral reflectance of a green camouflage coating DG0847 prepared in example 1 of the invention in the wavelength band of 350nm to 1400 nm.
FIG. 2 is a graph of the spectral reflectance of the green camouflage coating MG1151 prepared in the embodiment 2 of the invention in the wave band of 350nm-1400 nm.
FIG. 3 is a graph of the spectral reflectance of the green camouflage coating YG1357 prepared in example 3 of the invention in the wavelength range of 350nm to 1400 nm.
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. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The drugs/reagents used are all commercially available without specific mention.
Example 1
This embodiment provides a dark green camouflage coating DG0847. This coating comprises two layers of material: (1) DG0847 dark green camouflage paint; and (2) multifunctional protective glue.
(1) The specific formulation of DG0847 dark green camouflage paint is shown in table 1:
TABLE 1 DG0847 dark Green camouflage paint formulation
| Composition of | Mass ratio of |
| High-reflection black paste | 2.1 |
| Cobalt |
10 |
| Molybdenum-chromium red color paste | 1.2 |
| Medium chrome yellow color paste | 3.3 |
(2) The multifunctional protective adhesive comprises the following raw material components: PU resin, nano silicon oxide powder, PE wax powder, UV326, UV292, BYK163, DMF and aziridine cross-linking agent in a mass ratio of 50:8:2:3:1:0.3:25:5. and dispersing the raw materials on a high-speed dispersion machine at a high speed to uniformly disperse the powder in the slurry.
The specific preparation method comprises the following steps:
s1: sequentially weighing PU resin, nano silicon oxide powder, PE wax powder, UV326, UV292, BYK163, DMF and a nitrogen propyline cross-linking agent according to the mass ratio of the raw materials;
s2: dispersing on a high-speed dispersion machine at a rotating speed of 1500r/min until the fineness of the slurry is below 15 mu m;
the preparation method of the dark green camouflage coating DG0847 comprises the following steps:
the prepared DG0847 dark green camouflage paint is blade-coated on polyester fiber cloth by a 6-micron wire rod, then the polyester fiber cloth is placed in an oven to be baked for 20min at 80 ℃ and taken out, a DG0847 dark green camouflage paint color layer is obtained, then a multifunctional protective adhesive is blade-coated on the DG0847 dark green camouflage paint color layer by a 6-micron wire rod, the polyester fiber cloth is placed in an oven to be baked for 20min at 80 ℃ and taken out, then the color difference between the standard color before and after blade-coating of the protective layer, the lightness L value, the rubbing color fastness, the glossiness and the ultraviolet aging resistance are tested, the test result is shown in Table 4, and the test result is shown in figure 1, and the spectral reflectance curve of the polyester fiber cloth from 350nm to 1400nm is tested.
Tests prove that the testing parameters of the dark green camouflage coating obtained in the embodiment completely meet the requirements of the relevant national military standard medium dark green (DG 0847) on the LaAb value, the visible light brightness contrast, the near infrared brightness contrast, the spectrum channel, the 400nm-1200nm hyperspectrum, the spectrum angle, the spectrum distance and the like.
Example 2
The present embodiment provides a medium green camouflage coating MG1151. This coating comprises two layers of material: (1) green camouflage paint in MG 1151; and (2) multifunctional protective glue.
(1) The specific formula of the green camouflage paint in the MG1151 is shown in Table 2:
table 2 recipe of green camouflage paint in MG1151
| Composition of | Mass ratio of |
| High-reflection black paste | 0.3 |
| Cobalt blue color paste | 8.8 |
| Molybdenum-chromium red color paste | 0.6 |
| Medium chrome |
10 |
(2) The multifunctional protective adhesive comprises the following raw material components: PU resin, nano silicon oxide powder, PE wax powder, UV328, UV531, BYK163, cyclohexanone and aziridine crosslinking agent in a mass ratio of 50:8:2:3:1:0.3:25:5. and (3) dispersing the raw materials on a high-speed dispersion machine at a high speed to uniformly disperse the powder in the slurry.
The specific preparation method comprises the following steps:
s1: sequentially weighing PU resin, nano silicon oxide powder, PE wax powder, UV328, UV531, BYK163, cyclohexanone and azone cross-linking agent according to the mass ratio of the raw materials;
s2: dispersing on a high-speed dispersion machine at a rotating speed of 1500r/min until the fineness of the slurry is below 15 mu m;
the preparation method of the medium green camouflage coating MG1151 comprises the following steps:
the prepared MG1151 medium-green camouflage coating is blade-coated on polyester fiber cloth by a 6-micrometer wire bar, then the polyester fiber cloth is placed in an oven to be baked for 20min at 80 ℃, and then taken out, so as to obtain an MG1151 medium-green camouflage coating color layer, then a multifunctional protective adhesive is blade-coated on the MG1151 medium-green camouflage coating color layer by a 6-micrometer wire bar, the MG1151 medium-green camouflage coating color layer is placed in an 80 ℃ oven to be baked for 20min and then taken out, and then the color difference, the lightness L value, the rubbing color fastness, the glossiness and the ultraviolet aging resistance of the protective layer before and after blade coating are tested, the test results are shown in a table 4, and the 350nm-1400nm spectral reflectance curve is tested and shown in a graph 2.
Tests prove that the testing parameters of the dark green camouflage coating obtained in the embodiment completely meet the requirements of L a b value, visible light brightness contrast, near infrared brightness contrast, spectral channel, 400nm-1200nm hyperspectrum, spectral angle, spectral distance and the like required by the medium green (MG 1151) in the relevant national military standard.
Example 3
This example provides a yellow-green camouflage coating YG1357. This coating comprises two layers of material: (1) YG1357 yellow-green camouflage paint (2) multifunctional protective glue.
The specific formulation of YG1357 yellow-green camouflage paint is shown in table 3:
TABLE 3 YG1357 yellow-green camouflage coating color layer formula
| Make up of | Mass ratio of |
| High-reflection black paste | 0.1 |
| Cobalt blue color paste | 9.5 |
| Molybdenum-chromium red color paste | 0.5 |
| Medium chrome yellow color paste | 16 |
The multifunctional protective adhesive comprises the following raw material components: hydroxyl acrylic resin, nano silicon oxide powder, PE wax powder, UV326, UV292, BYK163, cyclohexanone and aziridine cross-linking agent in a mass ratio of 50:8:2:3:1:0.3:25:5. and (3) dispersing the raw materials on a high-speed dispersion machine at a high speed to uniformly disperse the powder in the slurry.
The specific preparation method comprises the following steps:
s1: weighing hydroxyl acrylic resin, nano silicon oxide powder, PE wax powder, UV326, UV292, BYK163, cyclohexanone and azone cross-linking agent in sequence according to the mass ratio of the raw materials;
s2: dispersing on a high-speed dispersion machine at the rotating speed of 1500r/min until the fineness of the slurry is below 15 mu m.
The preparation method of the yellow-green camouflage coating YG1357 comprises the following steps:
spraying the YG1357 yellow-green camouflage paint with a spray gun with the caliber of 1.5 to the tinplate to be 30-40 μm thick, then putting the paint into an oven to be baked for 20min at 80 ℃ and taking out the paint to obtain a YG1357 yellow-green camouflage coating color layer, spraying the multifunctional protective glue with a spray gun with the caliber of 1.5 to the YG1357 yellow-green camouflage coating color layer with the thickness of 10-15 μm, putting the paint into an oven at 80 ℃ to be baked for 20min and then taking out the paint, and then testing the color difference, lightness L value, friction color fastness, glossiness and ultraviolet aging resistance of the paint before and after the protective layer is scraped, wherein the test result is shown in Table 4, and the test result is shown in the graph of spectral reflectivity of 350-1400 nm and is shown in FIG. 3.
Tests prove that the testing parameters of the dark green camouflage coating obtained in the embodiment completely meet the requirements of a yellow green (YG 1357) in the relevant national military standard on the La b value, the visible light brightness contrast, the near infrared brightness contrast, the spectral channel, the 400nm-1200nm hyperspectrum, the spectral angle, the spectral distance and the like.
Table 4 test results of the coatings obtained in test 1 to 3 of the inventive examples
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. 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 multifunctional protective adhesive for the green camouflage coating is characterized by comprising the following raw material components: the coating comprises resin, PE wax powder, nano silicon oxide powder, an auxiliary agent, a solvent and a cross-linking agent, wherein the auxiliary agent comprises an ultraviolet absorbent, a light stabilizer and a dispersing agent.
2. The multifunctional protective adhesive with a green camouflage coating as claimed in claim 1, wherein the raw material components are a component a and a component b, and the component a and the component b respectively comprise the following components in parts by mass:
a component a:
50-70 parts of resin;
3-10 parts of nanoscale silicon oxide;
2-5 parts of PE wax powder;
1-5 parts of ultraviolet absorbent;
0.5-2 parts of light stabilizer;
0.3-1 of dispersant;
15-30 parts of solvent;
and b, component (a):
5-10 parts of a cross-linking agent.
3. The multifunctional protective adhesive for a green camouflage coating as set forth in claim 2, wherein the resin is an aliphatic polyurethane resin or a hydroxyacrylic resin having a hydroxyl number of 80 to 120.
4. The multifunctional protective adhesive for a green camouflage coating as set forth in claim 2, wherein the nano silica has an average particle size of 10nm to 60nm and a refractive index of visible light of 1.38.
5. The multifunctional protective adhesive of green camouflage coating as set forth in claim 2, wherein the PE wax powder is polyethylene micro wax, the average particle size is 5-8 μm, and Tg is 90-140 ℃.
6. The multifunctional protective adhesive with green camouflage coating as set forth in claim 2, wherein said ultraviolet absorber is at least one of UV326, UV328, and UV 234; the light stabilizer is at least one of UV292 and UV 531; the dispersant is at least one of byk103 and byk 163.
7. The multifunctional protective adhesive with green camouflage coating as claimed in claim 2, wherein the solvent is at least one of cyclohexanone, DMF and n-butyl ester.
8. The multifunctional protective adhesive for a green camouflage coating as set forth in claim 2, wherein said cross-linking agent is aziridine or polyisocyanate.
9. The method for preparing a multifunctional protective adhesive for a green camouflage coating according to any one of claims 1 to 8, comprising the steps of:
s1: weighing raw materials of the multifunctional protective adhesive of the green camouflage coating according to a formula;
s2: and (3) dispersing the slurry prepared in the step (S1) on a high-speed dispersion machine at 1500r/min until the fineness is lower than 15 mu m to obtain the multifunctional protective adhesive of the green camouflage coating.
10. The use of the multifunctional protective adhesive for green camouflage coating according to any one of claims 1 to 8, wherein the multifunctional protective adhesive is applied to the surface of the green camouflage coating which has been cured to form a protective layer.
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| CN202211463435.0A CN115895422A (en) | 2022-11-21 | 2022-11-21 | Multifunctional protective adhesive for green camouflage coating and preparation method and application thereof |
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|---|---|---|---|
| CN202211463435.0A CN115895422A (en) | 2022-11-21 | 2022-11-21 | Multifunctional protective adhesive for green camouflage coating and preparation method and application thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559028A (en) * | 2012-01-19 | 2012-07-11 | 北京航材百慕新材料技术工程股份有限公司 | Protection finish paint for wind power blade and preparation method of protection finish paint |
| CN114276722A (en) * | 2021-12-28 | 2022-04-05 | 常州回天新材料有限公司 | Light conversion transparent coating for photovoltaic back plate and preparation method and application thereof |
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- 2022-11-21 CN CN202211463435.0A patent/CN115895422A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559028A (en) * | 2012-01-19 | 2012-07-11 | 北京航材百慕新材料技术工程股份有限公司 | Protection finish paint for wind power blade and preparation method of protection finish paint |
| CN114276722A (en) * | 2021-12-28 | 2022-04-05 | 常州回天新材料有限公司 | Light conversion transparent coating for photovoltaic back plate and preparation method and application thereof |
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