Screening conductive coating/paint

A conductive coating and metal powder technology, applied in the fields of shielding conductive materials and chemical electronic materials, can solve the problems of easy delamination of solid and liquid, poor stability of uniform distribution of metal powder, and non-compliance with ISO14001 environmental certification standards, and achieve high conductivity and Finish and opacity, excellent dry film adhesion, the effect of avoiding paint cracking

Active Publication Date: 2005-06-29
SHANGHAI TRANSCOM ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our country is relatively backward in the field of electromagnetic shielding materials, especially the research on electromagnetic wave shielding materials with frequencies in the range of 10KHz to 1GHz has just started, with few research units, single varieties, and low electromagnetic shielding performance
[0007] Most of the current conductive coatings / lacquers are solvent-based, not environmentally friendly, and do not meet the ISO14001 environmental certification standard; due to the use of aggressive solvents, it is easy to cause cracks on the paint surface and external explosion of the internal gravity of the inner plastic material for thin-walled plastic materials. Easy solid-liquid delamination, poor uniform distribution of metal powder, poor stability, thick coating, poor conductivity and shielding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Preparation of pure silver conductive paint / varnish

[0035] Add ingredients in the following order, shearing to combine with a mixer:

[0036] Raw material name ratio

[0037] (1) Waterborne polyurethane dispersion 5%

[0038] (2) Isopropanol 5%

[0039] (3) Ethanol 13%

[0040] (4) N-Methylpyrrolidone (NMP) 1%

[0041] (5) Water 20%

[0042] (6) Silver powder 41%

[0043] (7) Carboxymethyl cellulose acetate butyrate solution (CMCAB) 5.5%

[0044] (8) Ethyl acetate 3%

[0045] (9) Triethylamine 1%

[0046] (10) Alkaline swelling milky thickener 5.5%

Embodiment 2

[0047] Embodiment 2: Preparation of pure silver conductive paint / varnish

[0048] Add ingredients in the following order, shearing to combine with a mixer:

[0049] Raw material name ratio

[0050] (1) Waterborne polyurethane dispersion 15%

[0051] (2) Isopropanol 5%

[0052] (3) Ethanol 13%

[0053] (4) N-Methylpyrrolidone (NMP) 1%

[0054] (5) Water 19%

[0055] (6) Silver powder 41%

[0056] (7) Carboxymethyl cellulose acetate butyrate solution (CMCAB) 1%

[0057] (8) Ethyl acetate 3%

[0058] (9) Triethylamine 1%

[0059] (10) Alkaline swelling milky thickener 1%

Embodiment 3

[0060] Embodiment 3: Preparation of pure silver conductive paint / varnish

[0061] Add ingredients in the following order, shearing to combine with a mixer:

[0062] Raw material name ratio

[0063] (1) Waterborne polyurethane dispersion 20%

[0064] (2) Isopropanol 5%

[0065] (3) Ethanol 13%

[0066] (4) N-Methylpyrrolidone (NMP) 1%

[0067] (5) Water 5%

[0068] (6) Silver powder 41%

[0069] (7) Carboxymethyl cellulose acetate butyrate solution (CMCAB) 6%

[0070] (8) Ethyl acetate 3%

[0071] (9) Triethylamine 1%

[0072] (10) Alkaline swelling milky thickener 5%

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Abstract

The invention relates to a shielding conducting coating paint,comprising the following components;metal powder 25-45%,sticker 5-25%, and thickener 1-12%,solvent 20-25%,regulator of PH value 0.5-2% and water 5-20%. The slice-shaped conducting powder is arranged averagely when the product is sprayed to be film,with high conductivity,cleanliness and degree of shielding. Its raw material being chosen and matched reasonably,makes the electric very small and outstanding shielding effect. The invention has rapid drying in low temperature,outstanding adhesive force, density of adhesiveness and wear resistance.

Description

Technical field: [0001] The invention relates to a chemical electronic material, especially a shielding conductive material, which is applied in the field of electronic communication. Background technique: [0002] Electromagnetic interference refers to the phenomenon that the normal function of electronic devices is disturbed or caused by harmful electromagnetic waves, hereinafter referred to as EMI. EMI can interfere with the normal function of almost all electronic appliances. This pair of electrostatic discharges also has a negative impact on electronic devices and is harmful to human health. It is a kind of electronic pollution for both products and humans. [0003] Product performance and cost requirements often prevent EMI problems from being resolved in the selection of electronic components. Therefore, the product chassis (shell) and wires are shielded to meet various specifications of electromagnetic compatibility. One method that is used more and more is to spr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/24C09D133/00C09D175/04
Inventor 杨建平
Owner SHANGHAI TRANSCOM ELECTRONICS TECH
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