Low-temperature-curing high-temperature-resistant wave-absorbing coating and preparation method thereof

A wave-absorbing coating and high-temperature-resistant technology, which is applied to radiation-absorbing coatings and coatings, can solve the problems of unfavorable large-area construction, high-temperature coating materials do not have long-term high-temperature resistance, and performance degradation, so as to improve thermal matching performance , Increase thermal stability and prevent cracking

Active Publication Date: 2022-04-01
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Existing radar absorbing coatings need to be cured at a relatively high temperature (150°C-250°C), which is not conducive to large-scale construction, and high-temperature coating materials are not It has long-term high temperature resistance or the performance drops seriously after high temperature resistance. Based on this situation, the present invention proposes a preparation method of a high temperature resistant radar absorbing coating that can be cured at low temperature, and the coating material with radar absorbing performance has Excellent mechanical properties and absorbing properties

Method used

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  • Low-temperature-curing high-temperature-resistant wave-absorbing coating and preparation method thereof
  • Low-temperature-curing high-temperature-resistant wave-absorbing coating and preparation method thereof
  • Low-temperature-curing high-temperature-resistant wave-absorbing coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A high-temperature-resistant radar wave-absorbing coating cured at low temperature, comprising base material A component and auxiliary material B component, base material A component consists of 600g alloy powder absorbent, 250g methylphenyl silicone resin (phenyl / methyl =1.2, purchased from Zhonghao Chenguang Chemical Research Institute Co., Ltd.), 15g xylene, 5g n-butanol, 15g butyl acetate, 15g cyclohexanone, 1g silicon carbide whiskers with a diameter of 0.6 μm and a length of 10 μm to 20 μm, 0.5 g10μm in diameter, 0.5mm in length carbon fiber, 3.0g anti-settling agent, 1.5g leveling agent; curing agent B is 5g polymethylsilazane (n value is 15; purchased from Anhui Aiyota Silicone Oil Co., Ltd.)

[0035] Wherein the used alloy powder absorber utilizes atomic deposition technology to coat one deck ZnO on the alloy powder surface, the ZnO consumption is alloy powder 3%, the complex dielectric constant real part of gained alloy iron powder is 28, the complex dielectric...

Embodiment 2

[0051] A high temperature resistant radar wave-absorbing coating cured at low temperature, comprising base material A component and auxiliary material B component, base material A component consists of 650g alloy powder absorbent, 300g methyl phenyl silicone resin (phenyl / methyl The ratio is 1.3), 25g xylene, 20g cyclohexanone, 1g silicon carbide whiskers with a diameter of 0.6μm and a length of 10μm to 20μm, 0.5g of carbon fibers with a diameter of 10μm and a length of 0.5mm, 2.0g of anti-settling agent, and 1.5g of leveling agent composition; curing agent B is 5g polymethylsilazane (n value is 15; purchased from Anhui Aiyota Silicone Oil Co., Ltd.)

[0052] The alloy powder absorbent used in it uses atomic deposition technology to coat a layer of Al on the surface of the alloy powder. 2 o 3 (Al 2 o 3 The amount is 3wt% of the alloy powder), the real part of the complex permittivity of the obtained alloy iron powder is 26, the imaginary part of the complex permittivity is ...

Embodiment 3

[0055] A high-temperature-resistant radar wave-absorbing coating cured at low temperature, comprising base material A component and auxiliary material B component, base material A component consists of 550g alloy powder absorbent, 300g epoxy-modified methylphenyl silicone resin (benzene The base / methyl ratio is 1.2), 50g xylene, 50g butyl acetate, 45g cyclohexanone, 1g silicon carbide whiskers with a diameter of 0.6μm and a length of 10μm to 20μm, 0.5g of carbon fibers with a diameter of 10μm and a length of 0.5mm, 2.0 g anti-settling agent, 1.5g leveling agent; curing agent B is 5g polysilica nitrogen oligomer (n value is 20; purchased from Anhui Aiyota Silicone Oil Co., Ltd.)

[0056] The alloy powder absorbent used in it uses atomic deposition technology to coat a layer of Al on the surface of the alloy powder. 2 o 3 (Al 2 o 3 Consumption is 3% of the alloy powder), the real part of the complex permittivity of the obtained alloy iron powder is 26, the imaginary part of t...

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Abstract

The invention provides a low-temperature curing high-temperature-resistant wave-absorbing coating and a preparation method thereof, and relates to the field of radar wave-absorbing functional coatings. The high-temperature-resistant wave-absorbing coating is prepared by taking methyl phenyl organic silicon resin or modified methyl phenyl organic silicon resin as an adhesive, alloy powder subjected to ball milling treatment as an absorbent and silicon-nitrogen oligomer as a curing agent, and adding a solvent, an auxiliary agent, a toughening agent and the like. The wave-absorbing coating has relatively high temperature tolerance, can resist 400 DEG C for 100 hours, can be cured at the temperature less than 80 DEG C, has relatively small reflectivity change before and after high temperature, has relatively high adhesive force and flexibility, and can solve the problems of low high temperature resistance, short temperature resistance time, high curing temperature, poor mechanical property and high coating hardness after curing of the existing wave-absorbing coating.

Description

technical field [0001] The invention belongs to the field of radar wave-absorbing paint, and in particular relates to a low-temperature-cured high-temperature-resistant wave-absorbing paint and a preparation method thereof. The material is used in aircraft and has both high-temperature resistance and radar wave-absorbing effects. Background technique [0002] In order to adapt to the requirements of rapid strikes, the speed of the aircraft will become faster and faster. Due to the heat generated by the engine and the influence of air resistance, the surface temperature of the aircraft will rise sharply during flight. In a high-temperature environment, traditional microwave-absorbing materials will decline in microwave-absorbing performance due to surface oxidation and microstructure changes. The development of new stealth weapons in my country has put forward very urgent requirements for high-temperature microwave-absorbing materials. [0003] At present, the high-temperatur...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/32C09D7/61C09D7/65
Inventor 贾冬梅王建国王浩继王彦淇罗振涛刘柳
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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