Wave-absorbing material and preparation method thereof

A technology of wave absorbing material and wave absorbing agent, applied in the field of wave absorbing material, can solve the problems of difficult to increase filling concentration, high cost, complicated process method, etc., and achieve good electromagnetic wave absorption performance, maintain integrity, and high magnetic permeability. Effect

Active Publication Date: 2014-06-25
重庆市鸿富诚电子新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the material properties, for any powder absorbent and rubber substrate, there is an upper limit for filling in the mixing process, and the larger the filler particles, the harder it is to increase the filling concentration; the worse the rubber coating, the filling concentration more difficult to improve
In recent years, with the research on the preparation technology of flexible wave-absorbing materials for rubber substrates, some achievements have been made in increasing the upper limit of the filling concentration, such as modifying the rubber substrate to enhance the coating performance of the rubber substrate; Surface treatment, improving the bonding performance of metal powder and organic rubber, etc. These methods can increase the filling concentration, but require more complex processes and more professional equipment
more expensive

Method used

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  • Wave-absorbing material and preparation method thereof
  • Wave-absorbing material and preparation method thereof
  • Wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of absorbing material, raw material comprises by mass part:

[0032]

[0033] The thermosetting elastomer is EPDM rubber.

[0034] The absorbing agent is sendust.

[0035] Described curing agent is dicumyl peroxide.

[0036] Described accelerator is accelerator D.

[0037] Described solvent is toluene.

[0038] The sheet diameter of the sheet-shaped wave absorbing agent is 20 μm, and the ratio of sheet diameter to thickness is 50:1.

[0039] This embodiment provides a method for preparing a wave-absorbing material, comprising the following steps:

[0040] (1) Dissolution of the matrix: Weigh the mass parts of the thermosetting elastomer, curing agent, and accelerator and dissolve them into the mass parts of the solvent, heat and stir at a high speed to form a solution, the heating temperature is 50 ° C, and the stirring rate is 1000 rpm ;Continue to stir for 10min after all dissolved;

[0041] (2) Mixing of the matrix and the wave absorbing agent: Weigh ...

Embodiment 2

[0045] A kind of absorbing material, raw material comprises by mass part:

[0046]

[0047] The thermosetting elastomer is nitrile rubber.

[0048] The absorbing agent is FeSiCr.

[0049] Described curing agent is benzoyl peroxide.

[0050] The accelerator is accelerator TMTD.

[0051] Described solvent is chlorinated hydrocarbon.

[0052] The sheet diameter of the sheet-shaped wave absorbing agent is 70 μm, and the ratio of sheet diameter to thickness is 150:1.

[0053] This embodiment provides a method for preparing a wave-absorbing material, comprising the following steps:

[0054] (1) Dissolution of the matrix: Weigh the mass parts of the thermosetting elastomer, curing agent, and accelerator and dissolve them into the mass parts of the solvent, heat and stir at a high speed to form a solution, the heating temperature is 80 °C, and the stirring rate is 3000 rpm ; Continue to stir for 60min after all dissolve;

[0055] (2) Mixing of the matrix and the wave absorbing ...

Embodiment 3

[0059] A kind of absorbing material, raw material comprises by mass part:

[0060]

[0061] The thermosetting elastomer is neoprene.

[0062] The wave absorbing agent is iron silicon nickel.

[0063] Described curing agent is tert-butyl benzoyl peroxide.

[0064] Accelerator TMTM.

[0065] Described solvent is butanone.

[0066] The sheet diameter of the sheet-shaped wave absorbing agent is 50 μm, and the ratio of sheet diameter to thickness is 100:1.

[0067] This embodiment provides a method for preparing a wave-absorbing material, comprising the following steps:

[0068] (1) Dissolution of the matrix: Weigh the mass parts of the thermosetting elastomer, curing agent, and accelerator and dissolve them into the mass parts of the solvent, heat and stir at a high speed to form a solution, the heating temperature is 65 ° C, and the stirring rate is 2000 rpm ; Continue to stir for 45min after all dissolved;

[0069] (2) Mixing of the matrix and the wave absorbing agent: ...

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Abstract

The invention provides a wave-absorbing material and a preparation method thereof. The wave-absorbing material is prepared from the following raw materials in parts by mass: 5-15 parts of thermosetting elastomer, 60-80 parts of flaky wave-absorbing agent, 0.1-2 parts of curing agent, 0.1-0.5 part of accelerator and 20-30 parts of solvent. The preparation method comprises the following steps: (1) dissolving a matrix; (2) mixing the matrix with the wave-absorbing agent; (3) scraping the base material; and (4) flattening the surface by a double-roller calender, and passing through a tunnel furnace to perform high-temperature curing, thereby obtaining the product. The method prevents the calendering from crushing the flaky wave-absorbing agent, and maintains the completeness of the flaky wave-absorbing agent particles. The magnetic poles are added to well orient the flaky wave-absorbing agent, thereby avoiding unordered arrangement of the particles in the high-polymer matrix due to calendering. The wave-absorbing material has the advantages of very high magnetic permeability and favorable electromagnetic wave absorption property, and can be prepared into a material of which the minimum thickness is 0.03mm.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of science and technology, the impact of electromagnetic radiation on the environment is increasing, and the demand for absorbing materials and shielding materials is also increasing. At the airport, flights are delayed due to electromagnetic wave interference; in hospitals, mobile phones often interfere with the normal work of various electronic medical instruments. In future high-tech and three-dimensional warfare, weapons and equipment will always face severe challenges of detection and anti-detection. The absorbing material is the key technology in the stealth technology, and the research on introducing the absorbing material into the stealth technology is highly valued by countries all over the world. At the same time, the military is in need of stealth for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L9/02C08L11/00C08K7/00C08K3/34C08K5/14
CPCC08K3/34C08K7/00C08K2201/003C08K2201/016C08L9/02C08L11/00C08L23/16C08L2205/03
Inventor 孙爱祥杨涛
Owner 重庆市鸿富诚电子新材料有限公司
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