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Radar wave-absorbing material and preparation method

A technology of radar absorbing materials and absorbers, which can be applied to radiation-absorbing coatings, epoxy resin coatings, antennas, etc., can solve problems such as poor flexibility, and achieve the effect of improving flexibility, elongation at break and high adhesion

Active Publication Date: 2020-11-13
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a radar absorbing material and its preparation method to solve the technical problem of poor flexibility of existing absorbing materials

Method used

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  • Radar wave-absorbing material and preparation method
  • Radar wave-absorbing material and preparation method
  • Radar wave-absorbing material and preparation method

Examples

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Effect test

Embodiment 1

[0031] A radar absorbing material, comprising the following raw materials in weight percentage:

[0032] Resin: 15%, electromagnetic wave absorber: 55%, diluent: 25.4%, curing agent: 1.8%, leveling agent: 1%, anti-settling agent: 0.8%, defoamer: 1%; among them, the resin includes ring Oxygen resin and modified epoxy resin, the modified epoxy resin accounts for 80% by weight of the total resin.

[0033] It should be noted that, in the examples of this application, the epoxy resins can be conventional E-44, E-42, E-39-D, E-35, E-31, E-21, E51, etc.; The oxygen resin is selected from one or more of rubber modified epoxy resin, polyurethane modified epoxy resin and polyacrylate modified epoxy resin. Specifically, the modified epoxy resin in the embodiment of the application is selected from rubber modified epoxy resin Epoxy resin, can choose EPP-175, NM-6168, NBR-1704, YS-616, ES-1001N, ES-1023, etc. T g Less than -50°C.

[0034] In the embodiment of the present application, on...

Embodiment 2

[0046] Same as Example 1, the difference is that the radar absorbing material includes the following raw materials in weight percentage:

[0047] Resin: 15%, electromagnetic wave absorber: 60%, diluent: 20.4%, curing agent: 1.8%, leveling agent: 1%, anti-settling agent: 0.8%, defoamer: 1%; among them, the resin includes ring Oxygen resin and modified epoxy resin, the modified epoxy resin accounts for 80% by weight of the total resin.

Embodiment 3

[0049] Same as Example 1, the difference is that the radar absorbing material includes the following raw materials in weight percentage:

[0050] Resin: 13%, electromagnetic wave absorber: 65%, diluent: 18.6%, curing agent: 1.4%, leveling agent: 0.5%, anti-settling agent: 1%, defoamer: 0.5%; among them, the resin includes ring Oxygen resin and modified epoxy resin, the modified epoxy resin accounts for 80% by weight of the total resin.

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Abstract

The invention provides a radar wave-absorbing material and a preparation method thereof. The radar wave-absorbing material comprises an electromagnetic wave absorber, resin and a curing agent, the resin comprises epoxy resin and modified epoxy resin, and the modified epoxy resin comprises one or more of rubber modified epoxy resin, polyurethane modified epoxy resin and polyacrylate modified epoxyresin; the glass transition temperature (Tg) of the modified epoxy resin is less than-50 DEG C. The invention discloses the radar wave-absorbing material. A compound system composed of modified epoxyresin with low Tg and traditional epoxy resin serves as a matrix substance of the wave-absorbing coating material, due to the fact that the modified epoxy resin has low Tg, a two-phase structure is formed after curing, a microarea formed by a rubber phase has the dual functions of initiating and stopping crazing, and the flexibility of the coating is improved.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing coatings, in particular to a radar wave-absorbing material and a preparation method thereof. Background technique [0002] Stealth technology has become the key technology of modern warfare, and its realization methods are mainly shape stealth and material stealth. The shape stealth technology is more difficult, and it is easy to degrade the structural performance of the target, while the stealth material technology is relatively simple and easy. Radar absorbing coating has many advantages such as simple process, adjustable performance, convenient construction and not limited by the shape of the workpiece, so it has become one of the main research directions of stealth material technology. [0003] At present, the resin matrices commonly used in radar absorbing coatings, such as chlorosulfonated polyethylene, polyurethane, and epoxy resin, have contradictions between high flexibility and h...

Claims

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Application Information

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IPC IPC(8): C09D5/32C09D163/00C09D163/02H01Q17/00
CPCC09D5/32C09D163/00H01Q17/00C08L2205/025C08L2205/03C08L63/00C08L79/02C08K13/02C08K3/08C08K3/24C08K3/34C08K3/04C08K3/042C08K3/18
Inventor 罗振涛王浩继丁铁伢王建国程文甘丹
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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