Electromagnetic shielding conductive coating and preparation method thereof

A conductive coating and electromagnetic shielding technology, applied in conductive coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of poor compatibility between inorganic and organic phases, high production costs, and many conductive base materials and precious metals. The effect of good coating flatness, low cost and excellent electrical conductivity

Inactive Publication Date: 2012-08-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the technical problems such as the conductive base material used in the electromagnetic shielding conductive coating in the prior art is more precious metal, the production cost is higher, and the compatibility of the inorganic phase and the organic phase is poor, one of the purposes of the present invention is to provide a High conductivity, acid and alkali resistance, oxidation resistance, low cost, easy access to raw materials, conductive coatings that can prevent metal powder from settling, good stability and convenient use; the second purpose of the present invention is to provide a process for achieving one of the purposes The preparation method of the conductive coating which is simple and convenient to operate is realized by the following technical scheme

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]According to the mass ratio of auxiliary agent and film-forming substance is 1:1, add 5g leveling agent, anti-settling agent and defoamer to 5g film-forming substance epoxy resin and acrylic resin, stir until completely dissolved; then add 12.75g Thickener organic bentonite was added to the mixture, then 0.75g of coupling agent was added, and stirred for 30 minutes; finally, 18.75g of sheet-shaped conductive powder (zinc powder, titanium powder, manganese powder, chromium powder) with a particle size of 500 mesh and similar 75g of conductive powder composed of 56.25g of spherical conductive powder (conductive polyaniline, conductive polythiophene) was stirred for 5 hours, and then 6.5g of curing agent was added to obtain an electromagnetic shielding conductive coating.

[0033] Gained electromagnetic shielding conductive coating comprises film-forming substance, conductive powder, thickener, coupling agent and curing agent, wherein, film-forming substance: conductive powd...

Embodiment 2

[0035] According to the mass ratio of additives and film-forming substances of 0.01:1, add 0.2g of wetting and dispersing agent and regulator to the mixture of 20g of film-forming substances alkyd resin and IPN resin, stir until completely dissolved; then thicken 11g Agent acrylic amide was added to the mixture, then 4g of coupling agent was added, and stirred for 50 minutes; finally, 25g of flaky conductive powder (a mixture of nickel powder, aluminum powder, and silver-plated copper powder) with a particle size of 300 mesh and spherical conductive powder were added. 50g of conductive powder composed of 25g of conductive polyaniline / polythiophene composite material, stirred for 3 hours, and then added with 15g of curing agent to obtain an electromagnetic shielding conductive coating.

[0036] Gained electromagnetic shielding conductive coating comprises film-forming substance, conductive powder, thickener, coupling agent and curing agent, wherein, film-forming substance: condu...

Embodiment 3

[0038] According to the mass ratio of additives and film-forming substances of 0.5:1, add 9g of wetting and dispersing agent to 18g of film-forming substances alkyd resin and fluorocarbon resin, stir until completely dissolved; then add 5g of thickener organic bentonite to the mixture Then add 3g of coupling agent and stir for 20min; finally add 12g of flaky conductive powder (silver-plated nickel powder) with a particle size of 100 mesh and spherical conductive powder (conductive polythiophene, conductive polyaniline / polythiophene composite Material mixture) 48g of conductive powder 60g, stirred for 2h, and then added 14g of curing agent to obtain electromagnetic shielding conductive coating.

[0039] Gained electromagnetic shielding conductive coating comprises film-forming substance, conductive powder, thickener, coupling agent and curing agent, wherein, film-forming substance: conductive powder: thickener: coupling agent: the mass ratio of curing agent= 18:60:5:3:14.

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PUM

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Abstract

The invention provides an electromagnetic shielding conductive coating and a preparation method thereof. The electromagnetic shielding conductive coating comprises film-forming substances, conductive powder, thickening agents, coupling agents and curing agents. The mass ratio of the film-forming substances to the conductive powder to the thickening agents to the coupling agents to the curing agents is 5-20:50-75:5-30:0.7-4:6.5-15. Auxiliaries are added into the film-forming substances and stirred to be completely dissolved, the thickening agents are added into mixture, the coupling agents are then added into the mixture, the conductive powder is added into the mixture after stirring, and the curing agents are added into the mixture, so that the electromagnetic shielding conductive coating is obtained. By means of composition and proportioning for the conductive coating, the prepared coating is excellent in electric conductivity and resistant to acid, alkaline and oxidization. Besides, the resistivity of the conductive coating prepared by the preparation method is continuously reduced, and conductive high molecular polymer for the conductive powder in the conductive coating is well compatible with organic resin, so that air bubbles and needle holes in the coating can be decreased.

Description

technical field [0001] The invention relates to an electromagnetic shielding conductive paint and a preparation method thereof, belonging to the technical field of chemical industry. Background technique [0002] Conductive paint is a conductivity of 10 -10 Above S / cm, the coating has the ability to conduct electric current and eliminate the accumulated static charge. The coating generally contains matrix resin, solvent and conductive substance, which can form a conductive coating on the substrate. On the one hand, it can prevent the interference of electromagnetic wave radiation in the environment on the signal of electronic products, so that the signal of electronic products is fidelity and stable; As a fluid material, the coating has the advantages of simple preparation method, low cost, and can be conveniently sprayed or brushed on the surface of plastic products of various shapes to form a conductive electromagnetic shielding coating, thereby achieving the purpose of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/00C09D167/08C09D127/12C09D5/24
Inventor 黄惠郭忠诚
Owner KUNMING UNIV OF SCI & TECH
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