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Foamed high resilience polyurethane wave-absorbing material and preparation method thereof

A wave-absorbing material and high-resilience technology, applied in the field of foamed high-resilience polyurethane wave-absorbing material and its preparation, can solve the problem of large dimensional tolerance of finished products, uneven distribution of absorbers and flame retardants, overall performance impact, etc. problem, to achieve the effect of accurate and consistent bottom surface size, beautiful visual effect, and regular material shape

Inactive Publication Date: 2009-09-02
NANJING BOPING ELECTRONICS TECH CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Because this kind of processing technology is easy to cause uneven distribution of absorbent and flame retardant in the wave-absorbing material, the consistency of mass production is poor. As a result, the dimensional tolerance of the final wave-absorbing material is very large, and the adhesive gradually ages as the wave-absorbing material increases with the service life, which causes the attached absorbent, flame retardant, etc. to fall off easily, and the use environment is seriously polluted. The environment cannot be guaranteed
At the same time, due to its own weight, the wave-absorbing material with a high height (above 700mm) is generally easy to bend after 2 years of use, the aesthetics of the darkroom will deteriorate, and the overall performance will be affected.

Method used

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  • Foamed high resilience polyurethane wave-absorbing material and preparation method thereof

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Embodiment

[0027] The specific production process and raw material configuration method of this product are as follows:

[0028] The raw materials are divided into A component and B component.

[0029] Component A is 100% polyether polyol with a molecular weight of 4000-6000 as the main material, and water, surfactant (silicone oil), crosslinking agent (diethanolamine or triethanolamine), organic tertiary amine catalyst as auxiliary materials .The proportion of auxiliary materials is 4%, 1%, 1.8%, 1.5% in order. Put the main materials and auxiliary materials into the mixing tank, mix and stir for 2 to 3 hours, and release them for later use. In order to improve the flame retardant performance of the product, add Add 15% melamine and 15-20% PCF or A300TBLS liquid flame retardant to polyether polyol, and add conductive carbon fiber and stir together.

[0030] B component is 4,4'-diphenylmethane diisocyanate

[0031] Put the prepared components A and B into the two material tanks of the l...

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Abstract

The invention relates to a foamed high resilience polyurethane wave-absorbing material and a preparation method thereof. In the foamed high resilience polyurethane wave-absorbing material, a foamed combining material takes 4,4'-diphenylmethane diisocyanate and polyether glycol as main reaction substances, and is added with a conventional blowing promoter. The foamed high resilience polyurethane wave-absorbing material is characterized in that the foamed combing material also comprises substances such as an absorbent, a flame retardant and the like. The material is applied to full-anechoic chambers and semi-anechoic chambers, not only can achieve the effect of absorbing electromagnetic waves, but also has the characteristics of good environmental protection, flexibility, and dimensional uniformity, good mounting matrix property, beautifulness and consistency, and is particularly suitable for clean experiment environment.

Description

technical field [0001] The invention relates to a novel wave-absorbing material and a preparation method thereof, in particular to a foamed high-resilience polyurethane wave-absorbing material and a preparation method thereof. Background technique [0002] Traditional wave-absorbing materials for anechoic chambers use soft polyurethane open-cell foam as the base, cut into pyramid shapes, and are made by impregnating electromagnetic wave-absorbing flame-retardant coatings in polyurethane foam, drying them, and then pasting them with adhesives. Installed in a dark room. The specific method is that the prepared wave-absorbing flame-retardant coating is impregnated and extruded in the soft polyurethane foam, and then dried. Since the coating contains an adhesive, after the wave-absorbing material is dried, absorbents, flame retardants and other substances are glued to the pores of the polyurethane foam. Because this kind of processing technology is easy to cause uneven distrib...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08K7/06C08K5/3492C08K5/49C08G101/00
Inventor 王相元刘维新黄忠明
Owner NANJING BOPING ELECTRONICS TECH CO LTD
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