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Graphene-based ultra-black extinction coating and preparation method thereof

A technology of graphene and matting coatings, which is applied in coatings, epoxy resin coatings, reflection/signal coatings, etc., can solve the problems of unsatisfactory visible-infrared light absorption, poor aging resistance, and high substrate selectivity. Achieve the effects of improving the performance of eliminating stray light, reducing reflectivity, and simple coating process

Active Publication Date: 2020-07-10
XIAN JUNSHENG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of high substrate selectivity, poor adhesion, poor aging resistance and unsatisfactory visible-infrared light absorption effect of the existing domestic black paint in the background technology, the present invention provides a black paint mainly used for optical components, barriers, etc. A preparation method based on graphene ultra-black matting coating on the surface of plates, light hoods, inner walls of lens barrels, darkrooms and other systems and parts that need to eliminate stray light

Method used

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  • Graphene-based ultra-black extinction coating and preparation method thereof
  • Graphene-based ultra-black extinction coating and preparation method thereof
  • Graphene-based ultra-black extinction coating and preparation method thereof

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preparation example Construction

[0025] The present invention at first provides a kind of preparation method based on graphene ultra-black matting coating, and this method comprises the following steps:

[0026] (1) Configure component B first, according to the following ratio:

[0027] Thinner 5.0~97.0 parts

[0028] Crosslinking agent 10.0~30.0 parts

[0029] Catalyst 1.0~10.0 parts

[0030] (2) Since the black filler in component A is easy to deposit, generally choose the method of on-site deployment and fully stirring in the mixer before adding the corresponding component B. Component A is added in the following proportion and order:

[0031]

[0032]

[0033] (3) Mix the solution prepared in step (1) and step (2) uniformly according to A:B=3~8:1 (weight ratio) during use, and the mixing time is about 0.5-3h, then filter and separate For equipment.

Embodiment 1

[0035] Add 70.0 parts of ethyl acetate, 25.0 parts of methyltriethoxysilane, and 5.0 parts of dibutyltin laurate into the container at room temperature, mix well and stir evenly, and record this solution as component B solution. In addition, the component A solution is prepared at room temperature, and the substances added and the corresponding order are as follows: 8 parts of a mixture of graphene and carbon powder, 10 parts of silicone resin, 50 parts of ethyl acetate, and 15 parts of methyltriethoxysilane , 8 parts of γ-methacryloxypropyltrimethoxysilane (KH-570), 9 parts of isopropanol. In a high-speed sand mill, stir the solution of component A at a speed of 1440r / min for 30 minutes, then mix the components A and B at a ratio of 5:1, and after stirring evenly, filter it with 300-mesh nylon gauze, that is, A uniformly dispersed black nano matte paint is obtained.

[0036] The material is coated on an aluminum alloy plate by spraying, and it is completely cured for 5 days ...

Embodiment 2

[0038] Add 70.0 parts of ethyl acetate, 25.0 parts of methyltriethoxysilane, and 5.0 parts of dibutyltin laurate into the container at room temperature, mix well and stir evenly, and record this solution as component B solution. In addition, the component A solution is prepared at room temperature, and the substances added and the corresponding order are as follows: 8 parts of a mixture of graphene and carbon powder, 10 parts of silicone resin, 50 parts of ethyl acetate, and 15 parts of methyltriethoxysilane , 8 parts of γ-methacryloxypropyltrimethoxysilane (KH-570), 9 parts of isopropanol. In a high-speed sand mill, stir the solution of component A at a speed of 1440r / min for 30 minutes, then mix the components A and B at a ratio of 5:1, and after stirring evenly, filter it with 300-mesh nylon gauze, that is, A uniformly dispersed black nano matte paint is obtained.

[0039] Apply the paint with a brush to the aluminum alloy plate by brushing, and completely cure it for 5 da...

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Abstract

The invention discloses a preparation method and an implementation method of a graphene-based ultra-black extinction coating with excellent visible light absorptivity and infrared absorptivity. The problems that existing black paint is high in substrate selectivity, poor in adhesive force, poor in aging resistance, not ideal in visible-infrared light absorption effect and the like are solved. Graphene is introduced, and the types and dosages of a binder and a cross-linking agent are adjusted, so that the matrix resin shrinks to form nano-scale and micron-scale holes during cross-linking and curing, an excellent light trapping structure can be formed on the outer surface of the coating under the condition that the strength of the matrix is not influenced, the reflectivity is further reduced, and the light absorption performance of the coating is optimized. The extinction coating prepared by the method is simple in coating process, wide in substrate selectivity, high in production efficiency, good in weather resistance and excellent in adhesion properties. The absorption rate of the coating in the wavelength range of 400-2300nm is 98.0%-98.5%, and the coating is suitable for opticalcomponents, baffles, lens hoods, lens cone inner walls, darkrooms and other systems and parts needing stray light elimination.

Description

technical field [0001] The invention relates to the field of preparation and application of coating materials, in particular to a method for preparing an ultra-black matte coating suitable for suppressing and absorbing stray light in visible light and infrared bands. Background technique [0002] The stray light of the optical system refers to the background radiation noise formed on the system detector by the light rays reaching the image surface of the system in the non-imaging field of view area. Stray light has a great impact on the optical system, which will reduce the signal-to-noise ratio of the target, blur the image of the observed target, and decrease the contrast, thus affecting the detection or identification capabilities of the entire system. In severe cases, the detected target signal is completely lost in the stray light In the background, the system cannot extract the target, or a false signal is formed on the system detector, causing the system to detect the...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D163/00C09D5/32C09D5/33C09D7/63
CPCC09D5/004C09D5/32C09D163/00C09D183/04C09D7/63C08K13/02C08K3/04C08K3/042C08K5/5419C08K5/5425C08K5/5415C08K13/04C08K7/18
Inventor 郭昭龙赵海新吴亚鸽
Owner XIAN JUNSHENG NEW MATERIAL TECH
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