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Electromagnetic shielding plastic and preparation method thereof

An electromagnetic shielding and plastic technology, which is applied in the field of electromagnetic shielding plastics and its preparation, can solve the problems of material shielding performance, unsatisfactory mechanical properties, no absorption loss of electromagnetic waves, and difficulty in obtaining shielding functions, etc., to achieve good electromagnetic shielding effect and equipment Less dependence, good weather resistance and stability

Active Publication Date: 2018-11-30
广东佳瑞达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plastic itself does not have electrical conductivity and magnetic conductivity. In order to achieve electromagnetic shielding, it is often necessary to modify the plastic, such as adding conductive metal powder, conductive mica powder, etc. to the plastic matrix to obtain electromagnetic shielding performance. However, due to the conductive particles and The compatibility of the plastic matrix, the dispersion of conductive particles, and processing conditions, etc., the shielding performance and mechanical properties of the final material are often unsatisfactory
[0004] Chinese patent 201210098259.5 discloses a preparation method of a stainless steel fiber resin-based composite conductive plastic, which uses a single stainless steel fiber as the basic component of the conductive filler. The cost of the raw material is expensive, and it has no function of absorbing and losing electromagnetic waves, so it is difficult to obtain a high shielding function

Method used

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  • Electromagnetic shielding plastic and preparation method thereof

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Effect test

Embodiment 1

[0026] An electromagnetic shielding plastic, prepared from the following raw materials by weight: 100 parts of polythiophene fluorenone polymer, 10 parts of steel fiber surface modified polypyrrole tube, 10 parts of Sn-Al-O-P, tetraisopropyl 1 part of titanate coupling agent, 1 part of antioxidant 1010.

[0027] The preparation method of the polythiophene fluorenone polymer comprises the following steps: 2,5-di(5-bromothiophen-2-yl)thiophene 20g, 2,5-dihydroxy-9-fluorenone 10g, carbonic acid Add 3 g of potassium to a three-necked flask connected to a water separator, add 100 g of dimethyl sulfoxide and 30 g of toluene, heat the reaction system to 120 ° C, stir and react for 5 hours under nitrogen protection, and remove the generated After removing the water and toluene, the reaction temperature was slowly raised to 135°C, and the reaction was stirred for 8 hours, then 5 g of bis(4-hydroxyphenyl)phenylphosphine oxide was added, and the reaction was continued for 1 hour, and the...

Embodiment 2

[0032] An electromagnetic shielding plastic, prepared from the following raw materials in parts by weight: 100 parts of polythiophene fluorenone polymer, 11 parts of steel fiber surface modified polypyrrole tube, 11 parts of Sn-Al-O-P, silane coupling agent 2 parts of KH550, 10762 parts of antioxidant.

[0033] The preparation method of the polythiophene fluorenone polymer comprises the following steps: 2,5-di(5-bromothiophen-2-yl)thiophene 20g, 2,5-dihydroxy-9-fluorenone 10g, carbonic acid Add 3.5g of cesium into a three-necked flask connected with a water separator, add 115g of N-methylpyrrolidone and 40g of toluene, heat the reaction system to 122°C, stir and react for 5.5 hours under the protection of helium, and remove the reaction mixture through a water separator. The water and toluene generated in the process, after removing all the water, the reaction temperature was slowly raised to 138 ° C, and the reaction was continued for 8.5 hours with stirring, and then 5 g of ...

Embodiment 3

[0038] An electromagnetic shielding plastic, prepared from the following raw materials in parts by weight: 100 parts of polythiophene fluorenone polymer, 13 parts of steel fiber surface modified polypyrrole tube, 13 parts of Sn-Al-O-P, silane coupling agent 2 parts of KH560, 10103 parts of antioxidant.

[0039] The preparation method of the polythiophene fluorenone polymer comprises the following steps: 2,5-di(5-bromothiophen-2-yl)thiophene 20g, 2,5-dihydroxy-9-fluorenone 10g, carbonic acid Add 4g of sodium to a three-neck flask connected to a water separator, add 130g of N,N-dimethylformamide and 45g of toluene, heat the reaction system to 124°C, stir and react for 6 hours under the protection of neon gas, and pass the water separation The water and toluene generated in the reaction process were removed by a device, and the reaction temperature was slowly raised to 141° C. after the water was completely removed, and the stirring reaction was continued for 9 hours, and then 5 ...

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Abstract

The invention discloses an electromagnetic shielding plastic. The electromagnetic shielding plastic is prepared from the following raw materials in parts by weight: 100 parts of polythiophene fluorenone polymers, 10-15 parts of steel fiber surface modified polypyrrole tubes, 10-15 parts of Sn-Al-O-P, 1-3 parts of a coupling agent and 1-3 parts of an antioxidant. The present invention also discloses the preparation method of the electromagnetic shielding plastic. The preparation method comprises the following steps: each of the raw materials is mixed uniformly; and then the mixture is put intoa twin-screw extruder to be mixed and extruded to obtain the electromagnetic shielding plastic. The disclosed electromagnetic shielding plastic has better mechanical properties and a better electromagnetic shielding effect.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an electromagnetic shielding plastic and a preparation method thereof. Background technique [0002] With the development of modern science and technology and the electronic industry, various household appliances, office appliances, instruments and equipment and other electronic products have been widely popularized and applied, bringing convenience to people and releasing a large amount of electromagnetic radiation, which is harmful to people's health . For the sake of information security and people's health, and to prevent information leakage and interference, more and more objects need electromagnetic shielding, the degree of shielding is increasing, and the time and space requirements for shielding are increasing. Therefore, it is imperative to seek materials with better electromagnetic shielding function. [0003] Materials with conductive and electromagnetic sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L65/00C08L79/04C08K9/06C08K9/04C08K7/06C08K3/32H05K9/00
CPCC08L65/00C08L2201/02C08L2201/08H05K9/0081H05K9/009C08L79/04C08K9/06C08K9/04C08K7/06C08K3/32
Inventor 曾强程旺生雷小素
Owner 广东佳瑞达科技有限公司
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