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Preparation of polyurethane wave-absorbing gel material

A technology of gel material and wave absorbing material, which can be applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of easy shedding of wave absorbing aids, complicated manufacturing process, single function, etc., so as to reduce storage and transportation space, The effect of simple molding process and low investment

Inactive Publication Date: 2013-06-26
江苏瑞丰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of the existing wave-absorbing materials such as complex manufacturing process, single function, easy-to-fall-off wave-absorbing additives, and flammability, and to provide a high-wave-absorbing performance, low smoke, low toxicity, and flame retardant. Polyurethane absorbing gel material with advantages of simple process and on-site foaming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Polyether polyol 100g (hydroxyl value 56mgKOH / g), methyl methyl phosphate 15g, silica airgel particles 0.05g, conductive carbon black 5g, ferrite 25g, magnesium hydroxide 6g, stannous octoate 0.2g, 0.3g of triethylenediamine, 3g of deionized water, 0.6g of silicone surfactant, stir evenly at room temperature, let it stand for 30 minutes, and obtain material A; take out 1 / 3 mass part of material A, add cyclopenta 1.2g of alkane and 13.2g of toluene diisocyanate, after stirring for 5 seconds, quickly poured into a foaming mold for room temperature foaming to obtain a bottom foam with a thickness of 10mm; after 10 minutes, take out 1 / 3 mass parts of material A, add 1.8g of cyclopentane and 13.2g of toluene diisocyanate, after stirring for 7 seconds, quickly pour into the foaming mold and carry out room temperature foaming on the bottom layer to obtain a 12mm thick middle layer foam; take out 1 / 3 of the mass after 10 minutes Part of material A, add 3g of cyclopentane and 13...

Embodiment 2

[0029] 100g of polyether polyol (hydroxyl value 42mgKOH / g), 12g of dimethyl phosphate, 7g of melamine, 0.12g of silica airgel particles, 7g of conductive carbon black, 30g of ferrite, 5g of aluminum hydroxide, Zinc borate 4g, dibutyltin dilaurate 0.25g, triethylenediamine 0.36g, deionized water 4g, silicone surfactant 1.1g Stir well at room temperature, let stand for 40 minutes to obtain material A; take out 1 / 3 For the material A in parts by mass, add 1.4 g of n-pentane and 15 g of toluene diisocyanate, stir for 4 seconds, then quickly pour it into a foaming mold for foaming at room temperature to obtain a bottom foam with a thickness of 11 mm; take out 1 / 2 of the foam after 10 minutes 3 parts by mass of material A, add 1.9g of n-pentane and 15g of toluene diisocyanate, after stirring for 4 seconds, quickly pour into a foaming mold and carry out room temperature foaming on the bottom layer to obtain a 15mm thick middle layer foam; after 10 minutes Then take out 1 / 3 mass part ...

Embodiment 3

[0031] Polyether polyol 100g (hydroxyl value 34mgKOH / g), diethyl ethyl phosphate 12g, melamine 9g, silica airgel particles 0.3g, conductive carbon black 5g, ferrite 32g, aluminum hydroxide 8g, 0.25g of stannous octoate, 0.4g of tetraethylenetriamine, 4.5g of deionized water, and 1.1g of silicone surfactant were stirred evenly at room temperature, and left to stand for 35 minutes to obtain material A; take out 1 / 3 mass part of material A , add 1.6g of isopentane and 17g of toluene diisocyanate, stir for 4 seconds, quickly pour into a foaming mold for room temperature foaming, and obtain a bottom layer foam with a thickness of 14mm; take out 1 / 3 mass parts of the material after 10 minutes A, add 2.1 g of isopentane and 17 g of toluene diisocyanate, stir for 4 seconds, quickly pour into a foaming mold and foam at room temperature on the bottom layer to obtain a 17mm thick middle layer foam; take out 1 / 3 after 10 minutes Add 3.3g of isopentane and 17g of toluene diisocyanate to th...

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Abstract

The invention discloses preparation of a polyurethane wave-absorbing gel material. The wave-absorbing material is prepared through polymerization reaction by taking polyether polyol, isocyanate, silicon dioxide aerogel particle, deionized water, a halogen-free flame retardant, graphitized carbon black, ferrite powder, an inflaming retarding smoke suppressor, a composite catalyst, a foam stabilizer, and a physical foaming agent as raw materials. The gel material has the advantages of good wave-absorbing performance, simple molding technology, good inflaming retarding performance, and excellent environmental performance.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to the preparation of a polyurethane wave-absorbing gel material. Background technique [0002] Absorbing materials refer to materials that can absorb most of the electromagnetic waves projected on its surface and convert them into other forms of energy with almost no reflection. With the development of modern science and technology, the impact of electromagnetic radiation on the environment is 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 addition, electromagnetic radiation causes direct and indirect damage to the human body through thermal effects, non-thermal effects, and cumulative effects. Therefore, controlling electromagnetic pollution and finding a material that can resist and weaken electromagnetic radiation...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08K13/02C08K3/36C08K5/521C08K5/3492C08K3/22C08K3/38C08K3/04C08J9/14C08L75/08C09K3/00C08G101/00
Inventor 杜峰
Owner 江苏瑞丰科技实业有限公司
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