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Infrared stealth coating material and preparation method thereof

A stealth paint and infrared technology, applied in the field of infrared stealth paint and its preparation, can solve the problems that the paint cannot be stored, the particles cannot be monodispersed, and the compatibility between aluminum powder and resin is not good.

Pending Publication Date: 2019-04-02
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, reducing the emissivity of the object surface is one of the most important methods of thermal infrared stealth at present. The materials that can reduce the emissivity are generally metal materials with high reflectivity. Metal materials are easy to prepare and low in cost. In the process of infrared stealth coating, aluminum powder is often directly added to the coating, which will lead to problems such as the coating cannot be stored and prone to sedimentation, mainly due to the poor compatibility between aluminum powder and resin.
Although the effective dispersion of particles in the polymer matrix can be improved by adding silane coupling agent or titanate coupling agent, the monodispersity of particles cannot be achieved.

Method used

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  • Infrared stealth coating material and preparation method thereof
  • Infrared stealth coating material and preparation method thereof
  • Infrared stealth coating material and preparation method thereof

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preparation example Construction

[0025] The preparation method of infrared stealth coating provided by the invention comprises the following steps:

[0026] S101: if figure 1 As shown, metal nanoparticles were reacted with silylated 2-bromoisobutyryl to generate modified metal nanoparticles; specifically, metal nanoparticles such as aluminum powder, copper powder or zinc powder were dispersed in toluene and isobutyryl In the mixed solvent composed of propanol, the mixed solvent composed of ethylbenzene and isobutanol or the mixed solvent composed of toluene and isobutanol, wherein, in the mixed solvent, the volume ratio of benzene solvent to alcohol is not more than 20:1, It is preferred to use a mixed solvent composed of toluene and isopropanol; then, add triethylamine or trimethylamine as a catalyst and silanized 2-bromoisobutyryl, and stir slowly at room temperature for 16-20 hours, preferably, use triethylamine Amine is used as a catalyst, and stirred slowly for 18 hours to fully react the metal nanopart...

Embodiment 1

[0033] 1. At room temperature, disperse the aluminum powder in a mixed solvent composed of toluene and isopropanol, add the catalyst triethylamine and silanized 2-bromoisobutyryl, and stir slowly at room temperature for 18 hours to make the surface of the aluminum powder The hydroxyl group of the product fully reacted with silanized 2-bromoisobutyryl, and the obtained solid reaction product was suction-filtered, washed three times with isopropanol, and the solid part was vacuum-dried to obtain modified aluminum nanoparticles.

[0034] 2. Disperse the above solid (i.e., modified aluminum nanoparticles) in isopropanol, feed nitrogen, add catalyst copper bromide, complexing agent bipyridine and polyethylene glycol-modified methyl methacrylate The ester is reacted at room temperature for 2 hours, so that the modified aluminum nano-particles fully react with the polyethylene glycol-modified methyl methacrylate under the action of a catalyst and a complexing agent. Dilute with isopr...

Embodiment 2

[0039] 1. At room temperature, disperse the copper powder in a mixed solvent composed of ethylbenzene and isobutanol, add the catalyst trimethylamine and silanized 2-bromoisobutyryl, and stir slowly at room temperature for 16 hours to make the surface of the copper powder The hydroxyl group of the product fully reacted with silanized 2-bromoisobutyryl, and the obtained solid reaction product was suction-filtered, washed 4 times with isobutanol, and the solid part was vacuum-dried to obtain modified copper nanoparticles.

[0040] 2. Disperse the above solid (i.e., modified copper nanoparticles) in isobutanol, feed nitrogen, add catalyst cuprous bromide, complexing agent pentamethyldiethylenetriamine and polyethylene glycol to modify The hydroxyethyl methacrylate was reacted at room temperature for 4 hours, so that the modified copper nanoparticles fully reacted with the polyethylene glycol-modified hydroxyethyl methacrylate under the action of a catalyst and a complexing agent. ...

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Abstract

The invention provides an infrared stealth coating material preparation method, which comprises: carrying out a reaction on metal nanoparticles and silanized 2-bromoisobutyryl to form modified metal nanoparticles; carrying out a reaction on the modified metal nanoparticles and a polyethylene glycol modified methacrylate polymer to form polyethylene glycol modified methacrylate polymer-grafted metal nanoparticles; and adding the polyethylene glycol modified methacrylate polymer-grafted metal nanoparticles into a coating material to prepare the infrared stealth coating material. According to thepresent invention, with the application of the polyethylene glycol modified methacrylate polymer-grafted metal nanoparticles in preparation of the infrared stealth coating material, the grafted modified metal nanoparticles have advantages of high dispersibility, less settling, long-time storage and good stability in the infrared stealth coating material.

Description

technical field [0001] The invention relates to an infrared stealth coating and a preparation method thereof. Background technique [0002] Any object whose temperature is above absolute temperature zero is always radiating electromagnetic waves of different wavelengths to the surrounding space, and the electromagnetic radiation with a radiation wavelength range of 0.76-1000 μm is called infrared radiation. Generally, electromagnetic waves in this band range are called infrared rays. . [0003] As an electromagnetic wave, infrared rays follow the laws of wave absorption, reflection and scattering during transmission, and are also absorbed and scattered by various solid particles, water vapor and other gas molecules in the atmosphere during transmission, making the infrared radiation energy Attenuation occurs, but infrared rays in the following bands can penetrate the atmosphere without attenuation: 1-3μm, 3-5μm, 8-14μm, infrared rays in these three bands can completely pene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/30
CPCC08K9/04C08K9/06C08K2003/0812C08K2003/085C08K2003/0893C08K2201/011C09D5/30C09D175/04
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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