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Composite coating electromagnetic shielding paint and composite coating electromagnetic shielding material prepared therefrom

A technology of electromagnetic shielding coatings and composite coatings, which is applied in conductive coatings, coatings, epoxy resin coatings, etc., to improve processing performance, ensure human safety, and widen the shielding band.

Active Publication Date: 2011-04-20
ARMY MEDICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the absorbing material itself, it is easily affected by the frequency, so it can only have a good shielding effect on a narrow frequency band.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Preparation of Conductive Layer Coatings

[0022] According to the proportion: styrene-acrylic emulsion 25ml, micron nickel powder 30g, coupling agent 0.6g, defoamer 2.5ml, wetting agent 0.5ml, alcohol ester twelve (film-forming aid) 0.5ml, hydroxyethyl Cellulose (thickener) 0.8ml, purified water 15ml to take each component.

[0023] Mix the components and stir them mechanically for 30 minutes to disperse them evenly in the solution to prepare the coating.

[0024] 2. Preparation of absorbing layer coating

[0025] According to the proportion: 40ml of styrene-acrylic acid emulsion, 60g of manganese zinc ferrite with a particle size of 300 mesh, 1.2g of coupling agent, 3ml of defoamer, 0.5ml of wetting agent, 0.5ml of alcohol ester twelve (film-forming aid) , hydroxyethyl cellulose (thickener) 1ml, purified water 35ml to take each component.

[0026] The components were mixed and mechanically stirred for 30 minutes to make them evenly dispersed in the solution, and...

Embodiment 2

[0030] 1. Preparation of Conductive Layer Coatings

[0031] According to the proportion: styrene-acrylic emulsion 30ml, micron nickel powder 50g, coupling agent 1g, defoamer 3ml, wetting agent 0.5ml, alcohol ester twelve (film-forming aid) 0.5ml, hydroxyethyl cellulose (thickener) 1ml, purified water 35ml to take each component.

[0032] Mix the components and stir them mechanically for 30 minutes to disperse them evenly in the solution to prepare the coating.

[0033] 2. Preparation of absorbing layer coating

[0034] According to the proportion: 20ml of styrene-acrylic acid emulsion, 50g of stainless steel powder with a particle size of 300 mesh, 1g of coupling agent, 2.5ml of defoaming agent, 0.8ml of wetting agent, 1ml of alcohol ester twelve (film-forming aid), 1ml of hydroxyethyl Cellulose (thickener) 1.5ml, purified water 8ml to take each component.

[0035] Mix the components and stir them mechanically for 30 minutes to disperse them evenly in the solution to prep...

Embodiment 3

[0039] 1. Preparation of Conductive Layer Coatings

[0040] According to the proportion: styrene-acrylic acid emulsion 30ml, micron nickel powder 50g, coupling agent 1g, defoamer 3ml, wetting agent 0.5ml, alcohol ester twelve (film-forming aid) 0.5ml, strong ethyl cellulose (thickener) 1ml, purified water 35ml to take each component.

[0041] Mix the components and stir them mechanically for 30 minutes to disperse them evenly in the solution to prepare the coating.

[0042] 2. Preparation of absorbing layer coating

[0043] According to the proportion: 35ml of styrene-acrylic acid emulsion, 3g of micron-sized conductive carbon black, 0.8g of L-5Z coupling agent, 1ml of wetting agent, 0.5ml of alcohol ester twelve (film-forming aid), 26ml of purified water to take each group point.

[0044] Mix the components and stir them mechanically for 40 minutes to disperse them evenly in the solution to prepare the coating.

[0045] According to the standard SJ20524-1995 "Test Method...

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Abstract

The invention relates to the field of electromagnetic wave shielding, in particular to a composite coating electromagnetic shielding paint and a composite coating electromagnetic shielding material prepared therefrom. The composite coating electromagnetic shielding paint comprises a conducting layer paint with a reflection function and a wave-absorbing layer paint with an absorption function, wherein the reflecting layer paint comprises the components of polymer emulsion, a conducting filler, a coupling agent, a defoaming agent, a wetting agent, a film forming assistant, a thickening agent and water; and the wave-absorbing layer paint comprises the components of polymer emulsion, a wave-absorbing filler, a coupling agent, a defoaming agent, a wetting agent, a film forming assistant, a thickening agent and water. The invention also discloses a composite coating electromagnetic shielding material prepared by coating the paint. The material is prepared by the steps of firstly coating the conducting layer paint on the surface of a base material, drying, then coating the wave-absorbing layer paint and the like. In the invention, the electromagnetic shielding material prepared by using the mode of compounding the wave-absorbing layer with the reflecting layer effectively reduces secondary pollution caused by the reflection of electromagnetic radiation and has wider shielding wave band in comparison to a pure wave absorbing coating; and the use of water emulsion reduces the production of harmful volatile matters and guarantees body safety.

Description

technical field [0001] The invention relates to the field of electromagnetic wave shielding, in particular to a composite coating electromagnetic shielding paint and a composite coating electromagnetic shielding material prepared therefrom. Background technique [0002] Electromagnetic radiation is a product of modern civilization. With the progress of society and the development of science, the increasing popularity of electronics and information technology, electromagnetic waves have filled every corner of our lives. As a physical factor that is constantly increasing in the human living environment, electromagnetic radiation is Changing the physical nature of the environment in which humans live, human exposure to electromagnetic radiation is increasing in intensity, duration, and complexity. A general consensus is that electromagnetic radiation has become the fourth largest public hazard to human beings after air pollution, water pollution and noise pollution. The enviro...

Claims

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Application Information

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IPC IPC(8): C09D125/14C09D133/04C09D131/04C09D175/04C09D163/00C09D5/24C09D5/32C09D5/33
Inventor 余争平张涛石小波王勇张红川张广斌王源
Owner ARMY MEDICAL UNIV
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