阅读说明：本技术 防可见光近红外迷彩系列隐身涂料及其制备方法 (Invisible light-proof near-infrared camouflage series stealth coating and preparation method thereof ) 是由 刘岳麟 陈小庆 宋欢欢 李超宇 王学龙 李志宝 侯继宗 于 2020-11-24 设计创作，主要内容包括：本发明涉及的是防可见光近红外系列迷彩隐身涂料及其制备方法,涂料由甲、乙组分组成。其中甲组分由丙烯酸树脂、分散剂、流平剂、消泡剂、混合溶剂A、云母粉、铝粉、二氧化钛、光学特种颜料、紫外线吸收剂等组成；乙组分由多异氰酸酯、混合溶剂B、催化剂组成。本发明通过对树脂及固化剂的考察、颜料品种及搭配比例的筛选与复配,涂料精度、重现度、稳定度极佳；铝粉、二氧化钛及光学特种颜料能有效减少红外线反射,降低目标发现率,大大提高了涂料的隐身性能。(The invention relates to a visible light and near infrared resistant camouflage stealth coating and a preparation method thereof. Wherein the component A comprises acrylic resin, a dispersant, a leveling agent, a defoaming agent, a mixed solvent A, mica powder, aluminum powder, titanium dioxide, an optical special pigment, an ultraviolet absorbent and the like; the component B consists of polyisocyanate, mixed solvent B and catalyst. By inspecting the resin and the curing agent and screening and compounding the pigment variety and the matching proportion, the coating has excellent precision, repeatability and stability; the aluminum powder, the titanium dioxide and the optical special pigment can effectively reduce infrared reflection, reduce the target discovery rate and greatly improve the stealth performance of the coating.)

1. the invisible light-resistant near-infrared camouflage series stealth coating is composed of a component A and a component B, and is characterized in that the component A is prepared from the following components in percentage by mass:

wherein the formula of the component B is as follows:

84 to 96 percent of polyisocyanate

0.06 to 0.30 percent of catalyst

3 to 20 percent of mixed solvent B.

2. The invisible-light-resistant near-infrared camouflage series stealth coating as claimed in claim 1, wherein the acrylic resin is any one or a mixture of two acrylic resins with different hydroxyl values, which are developed by self-made manufacturers, in any proportion.

3. The invisible near-infrared camouflage series camouflage stealth coating of claim 1 wherein the dispersant is at least one of a low molecular weight unsaturated polycarboxylic polymer plus polysiloxane copolymer, an acid group containing copolymer.

4. The invisible light near-infrared camouflage series stealth coating as claimed in claim 1, wherein the leveling agent is at least one of polyether modified polydimethylsiloxane and polyether modified polymethylalkyl siloxane.

5. The invisible near-infrared camouflage series camouflage stealth coating of claim 1 wherein the defoamer is at least one of a foam-breaking polysiloxane, a foam-breaking polymer, and a polysiloxane.

6. The invisible-light-resistant near-infrared camouflage series stealth coating as claimed in claim 1, wherein the optical special pigment is any one or a mixture of several of cobalt green, iron green, chrome green, iron yellow, nickel titanium yellow, zinc chrome yellow, iron black, carbon black and perylene black in any proportion.

7. The invisible near-infrared camouflage series stealth coating as claimed in claim 1, wherein the polyisocyanate of component b is an isocyanate compound with a functionality of 2 or more, and the NCO content of the isocyanate compound is 8% to 30%.

8. The invisible light near-infrared camouflage series camouflage stealth coating as claimed in claim 1 wherein the catalyst of component b is at least one of dibutyltin dilaurate, stannous octoate, dibutyltin diacetate.

9. The invisible-light-resistant near-infrared camouflage series stealth coating as claimed in claim 1, wherein the mixed solvent A is at least one of xylene, propylene glycol methyl ether acetate, butanone, methyl isobutyl ketone and butyl acetate, and the mixed solvent B is at least one of xylene, propylene glycol methyl ether acetate, butanone and butyl acetate.

10. The preparation method for preparing the visible light and near infrared resistant camouflage paint as claimed in claims 1 to 9 is characterized in that the formula is prepared, and the preparation process of the component A comprises the following steps: sequentially adding a mixed solvent A, a dispersing agent, a flatting agent, a defoaming agent and an ultraviolet absorbent into acrylic resin under the stirring state, sequentially adding mica powder, aluminum powder, titanium dioxide and optical special pigments in different proportions after uniformly mixing, grinding until the fineness is less than 30 mu m, filtering and discharging to obtain a component A; the preparation process of the component B comprises the following steps: and sequentially adding the catalyst and the mixed solvent B into the polyisocyanate under the stirring state, uniformly stirring and filtering to obtain the component B.

Technical Field

The invention belongs to the technical field of stealth coatings, and particularly relates to a visible light-proof near-infrared camouflage series stealth coating and a preparation method thereof.

Background

The photoelectric technology is increasingly widely and deeply applied in the military field, so that the performance of various modern weapon equipment is greatly improved, and with the development of the infrared detection technology and the appearance of advanced infrared detectors, the infrared detection occupies an increasingly important position in modern war and has an increasingly greater threat to camouflage targets. The hyperspectral remote sensing detection technology appearing in recent years puts higher requirements on stealth of optical wave bands.

The appearance of the hyperspectral remote sensing detection technology is regarded as a revolution of the remote sensing technology, the hyperspectral imager can simultaneously image the same target on a continuous spectrum section, the spectral characteristics of the observed target are directly reflected, and the target composition of each corresponding pixel is directly inverted through a spectral characteristic curve, so that a disguised target different from the background environment is disclosed. The typical detection range of the hyperspectral remote sensing detection technology is 400-2500 nm, three wave bands of ultraviolet, visible light and near infrared are included, and serious threat is caused to battlefield survival of the camouflage target.

For the invisible near infrared of the equipment, the target and the background are in the same color and spectrum, so the color difference (delta E), the visible light brightness factor (Y) and the near infrared brightness factor (beta) are very critical parameters. The camouflage stealth paint is a convenient, economic and good-adaptability optical camouflage material, has the protection and decoration of common paints, also has the camouflage deformation effect, can artificially reduce the difference of chromatic aberration, visible light and near-infrared brightness between a background and a camouflage target by adopting single-color or multi-color camouflage spots according to the difference of natural backgrounds or activity regions (grasslands, mountainous regions, snowfields, wastelands, deserts, hills, forests and the like) of the target so as to distort the appearance characteristics of the target, and further achieve the stealth purpose. In addition, the camouflage stealth coating is particularly suitable for quickly camouflage and stealth on weaponry under field and field conditions; the appearance of the weapon equipment is not required to be changed, the design is not required, and the visible light and near infrared stealth of the equipment are influenced very importantly.

The research on the near-infrared stealth coating in China is relatively late, a great deal of research is carried out by a large number of units, the color of green vegetation is simulated by blending pigments so as to achieve the same color in the traditional camouflage coating, but the same spectrum of a near-infrared band cannot be realized due to the fact that the traditional camouflage coating does not have the tissue structure and the material components of the vegetation, and the target is obviously exposed under the hyperspectral remote sensing detection. In addition, according to the reflection of a user unit, after the domestic existing visible light near-infrared stealth coating is used for a period of time, the phenomenon of stealth failure occurs due to poor weather resistance; and the repairability is poor, and obvious infrared characteristic difference can be formed after the repair. Moreover, military equipment and vehicles are used in field environments with complex climate throughout the year, requirements on medium resistance and weather resistance are strict, optical performance, mechanical performance, medium resistance and the like of the existing products cannot be both achieved, mechanical performance and medium resistance are weak, and actual use requirements cannot be met. In conclusion, the problem to be solved at present is to develop a set of near-infrared camouflage stealth coating with excellent comprehensive performance.

Disclosure of Invention

The invention aims to develop a visible light-proof near-infrared camouflage color series stealth coating with excellent comprehensive performance aiming at the current research and application situation of visible light-proof near-infrared camouflage color stealth coatings of military equipment and vehicles, and solves the defect that the near-infrared band optical performance, the mechanical performance, the corrosion resistance and the like of the existing domestic products cannot be compatible. The theoretical basis and key technology of the preparation of the stealth coating with excellent near-infrared band optical performance and comprehensive performance are mastered, the corresponding technical difficulty is broken through, the functional research of near-infrared camouflage stealth is completed, the serialized near-infrared stealth coating is researched and prepared, and the mass and stable production supply capacity is formed.

The invention mainly aims at the application and protection requirements of military field equipment and vehicles, carries out professional technical research, and prepares a series of invisible light-proof near-infrared camouflage stealth coatings, wherein the main colors comprise DG0730 dark green, EG1456 emerald green and SE2635 sandy soil (refer to the relevant requirements of GJB798-90 camouflage coating paint film color).

The series of visible light-proof near-infrared camouflage stealth coatings comprise a component A and a component B. Wherein the component A comprises acrylic resin, a dispersant, a leveling agent, a defoaming agent, a mixed solvent A, mica powder, aluminum powder, titanium dioxide, an optical special pigment, an ultraviolet absorbent and the like; the component B consists of polyisocyanate, mixed solvent B and catalyst.

The formula of the invisible light-resistant near-infrared camouflage series stealth coating A comprises the following components in percentage by mass:

the acrylic resin is any one or a mixture of two of acrylic resins with different hydroxyl values, which are researched and developed by self-made in any proportion.

The dispersing agent is at least one of polysiloxane copolymer and acid group-containing copolymer added to low molecular weight unsaturated polycarboxylic acid polymer.

The leveling agent is at least one of polyether modified polydimethylsiloxane and polyether modified polymethyl alkyl siloxane.

The defoaming agent is at least one of foam-breaking polysiloxane, foam-breaking polymer and polysiloxane.

The mixed solvent A is at least one of xylene, propylene glycol methyl ether acetate, butanone, methyl isobutyl ketone and butyl acetate.

The special optical pigment is any one or a mixture of several of cobalt green, iron green, chromium green, iron yellow, nickel titanium yellow, zinc chromium yellow, iron black, carbon black and perylene black in any proportion.

The ultraviolet absorbent is at least one of Eversorb 84, Eversorb 71 and Eversorb 79.

The formula of the component B of the invisible light-resistant near-infrared camouflage series stealth coating comprises the following components in percentage by mass:

84 to 96 percent of polyisocyanate

0.06 to 0.30 percent of catalyst

3 to 20 percent of mixed solvent B

The polyisocyanate is an isocyanate compound with the functionality of more than 2, and the NCO content of the polyisocyanate is 8-30%.

The catalyst is at least one of dibutyltin dilaurate, stannous octoate and dibutyltin diacetate.

The mixed solvent B is at least one of xylene, propylene glycol methyl ether acetate, butanone and butyl acetate.

The preparation method of the visible light and near infrared resistant series camouflage stealth coating comprises the following steps of preparing materials according to the formula:

adding a mixed solvent A, a dispersing agent, a flatting agent, a defoaming agent and an ultraviolet absorbent into acrylic resin in sequence under a stirring state, adding mica powder, aluminum powder, titanium dioxide and optical special pigments in different proportions after uniformly mixing, grinding until the fineness is less than 30 mu m, filtering and discharging to obtain the component A.

The preparation method of the visible light and near infrared resistant series camouflage stealth coating comprises the following steps of preparing materials according to the formula:

and sequentially adding the catalyst and the mixed solvent B into the polyisocyanate under the stirring state, uniformly stirring and filtering to obtain the component B.

The key points of the technology of the invention are as follows: preparation of a visible light-resistant near-infrared series camouflage stealth coating A component. The special optical pigment is specifically represented by the blending of the types and the proportions of the special optical pigments so as to achieve the balance of the optical performance index requirements and the comprehensive performance.

The invention relates to a visible light and near infrared resistant series camouflage painting stealth paint, which comprises DG0730 dark green, EG1456 emerald green and SE2635 sandy soil (refer to the relevant requirements of GJB798-90 camouflage paint film color). The method has the following beneficial effects:

(1) the embodiment of the invention combines the exploration of the optical performance and the reflectivity in the visible spectrum range, overcomes the difficulties of complicated color of the camouflage paint film, no relevant standard color card and the like, considers the optical characteristics of chromatic aberration, luster, visible light, near infrared brightness and the like by researching the resin and the curing agent and screening and compounding the pigment variety and the matching proportion, completely realizes the technical difficulty of performing camouflage color matching only by optical parameter values, and has excellent coating precision, reproducibility and stability.

(2) The aluminum powder, the titanium dioxide and the optical special pigment in the embodiment of the invention can effectively reduce infrared reflection, reduce the target discovery rate and greatly improve the stealth performance of the coating. Meanwhile, the components are well matched, the mechanical property, the medium resistance, the weather resistance and the three-proofing property of the coated coating are enhanced, and the developed visible light and near infrared camouflage stealth coating completely meets the requirements on the three-proofing property in GJB798-90 camouflage coating paint film color, GJB 1887-94 visible light-proof near infrared solvent type camouflage coating specification, GJB 7928 auxiliary 2012 camouflage coating general requirement and GJB 150 auxiliary 2009 military equipment environment test method.

Detailed Description

This example demonstrates the preparation method of a camouflage stealth coating for preventing visible light near infrared series.

The first embodiment is as follows:

(1) preparation of a component A of the invisible-light-resistant near-infrared camouflage stealth coating (DG0730 dark green): adding 3kg of dimethylbenzene, 3kg of butyl acetate, 3.0kg of dispersing agent, BYK-110, 0.2kg of flatting agent BYK-306 and 0.4kg of defoaming agent BYK-066N into 52.0kg of acrylic resin in a stirring state, stirring and dispersing uniformly, then adding 5.4kg of mica powder, 3.5kg of aluminum powder, 5.7kg of titanium dioxide, 23.4kg of optical special pigment and 0.4kg of Eversorb 84 ultraviolet absorbent into the mixture in sequence, stirring the mixture for 30 minutes, grinding and dispersing the mixture until the fineness is less than 30 mu m, and filtering and discharging the mixture to obtain a component A.

(2) Preparing a component B of the visible light-proof near-infrared camouflage stealth coating: adding 90kg of polyisocyanate with the NCO content of 18%, 4.9kg of dimethylbenzene, 4.9kg of butyl acetate and 0.2kg of dibutyltin dilaurate into a drawn cylinder under the stirring state, stirring for 25 minutes, and filtering and discharging to obtain the component B.

Example two:

(1) preparation of a component A of the visible light-proof near-infrared camouflage stealth coating (EG1456 emerald green): adding 4.0kg of dimethylbenzene, 4.0kg of butyl acetate, 2.5kg of dispersant BYK-110, 0.30kg of flatting agent BYK-306 and 0.40kg of defoaming agent BYK-066N into 49.0kg of acrylic resin in a stirring state, stirring and dispersing uniformly, then adding 4.2kg of mica powder, 5.0kg of aluminum powder, 5.5kg of titanium dioxide, 24.8kg of optical special pigment and 0.30kg of Eversorb 84 ultraviolet absorbent into the mixture in sequence, stirring the mixture for 30 minutes, grinding and dispersing the mixture until the fineness is less than 30 mu m, and filtering and discharging the mixture to obtain the component A.

(2) Preparing a component B of the visible light-proof near-infrared camouflage stealth coating: 88.2kg of polyisocyanate with NCO content of 22%, 5.3kg of dimethylbenzene, 5.3kg of butyl acetate and 0.2kg of dibutyltin dilaurate are added into a drawn cylinder under the stirring state, stirred for 25 minutes, and filtered and discharged to obtain a component B.

Example three:

(1) preparation of component A of visible light-resistant near-infrared camouflage stealth paint (SE2635 sandy soil color): adding 3.5kg of dimethylbenzene, 3.5kg of butyl acetate, 2.7kg of dispersant BYK-110, 0.25kg of flatting agent BYK-306 and 0.3kg of defoaming agent BYK-066N into 50.0kg of acrylic resin in a stirring state, stirring and dispersing uniformly, then adding 5.0kg of mica powder, 6.8kg of aluminum powder, 7.0kg of titanium dioxide, 20.7kg of optical special pigment and 0.25kg of Eversorb 84 ultraviolet absorbent into the mixture in sequence, stirring the mixture for 30 minutes, grinding and dispersing the mixture until the fineness is less than 30 mu m, and filtering and discharging the mixture to obtain the component A.

(2) Preparing a component B of the visible light-proof near-infrared camouflage stealth coating: 84.5kg of polyisocyanate with the NCO content of 26%, 7.7kg of dimethylbenzene, 7.7kg of butyl acetate and 0.1kg of dibutyltin dilaurate are added into a pulling cylinder under the stirring state, stirred for 25 minutes, and filtered and discharged to obtain the component B.

Effects of the implementation

The performances of the invisible light-resistant near-infrared camouflage stealth coatings in the examples 1 to 3 are tested by referring to GJB798-90 camouflage coating paint film color, GJB 1887-94 visible light-resistant near-infrared solvent type camouflage coating specification, GJB 7928 + 2012 camouflage coating general requirement and GJB 150 + 2009 military equipment environment test method, and the test results are as follows: