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Aqueous emulsion type electromagnetic wave shielded coating and preparation process thereof

A technology of shielding coatings and water-based latex, applied in polyester coatings, epoxy resin coatings, reflection/signal coatings, etc., can solve problems such as environmental pollution, single film-forming resin, and high cost, and achieve good physical environment performance and improved performance. Film-forming performance, viscosity improvement effect

Inactive Publication Date: 2003-10-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional electromagnetic wave shielding coatings use organic solvents as diluents. The disadvantages are: 1. Harmful substances will be volatilized during preparation and use, which will pollute the environment and damage human health; 2. Increase the cost
The application documents of this patent only stated that the electromagnetic wave shielding performance of this water-based conductive composition is stable, and that the viscosity and dispersion have no obvious changes within two or three months, but did not introduce the frequency band and shielding effectiveness of electromagnetic waves that can be shielded; in addition , from the perspective of selected components, bifunctional amphoteric particles need to be prepared, and the film-forming resin is single, only polyacrylamide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The components of coating and the content (parts by weight) of each component are as follows:

[0036] 50 parts of water-based acrylate

[0037] Micron nickel powder 15 parts

[0038] Micron aluminum powder 15 parts

[0039] 3 parts methoxypropanol

[0040] 2 parts isocyanate

[0041] 40 parts of purified water

[0042] The preparation method of coating is as follows:

[0043] (1) Nickel powder and aluminum powder are dried at 60°C to make them powdery;

[0044] (2) Mix nickel powder and aluminum powder, methoxy propanol, water-based acrylic acid ester, and purified water together, and grind in a grinder for 10-20 minutes to make the metal particles fine and each component evenly fine;

[0045] (3) After mixing evenly, add thickener isocyanate to adjust the viscosity of the paint.

Embodiment 2

[0047] The components of coating and the content (parts by weight) of each component are as follows:

[0048] 50 parts of water-based polyurethane resin

[0049] Glass particles covered with copper plating 35 parts

[0050] Adipic acid 2 parts

[0051] Silicone oil 2 parts

[0052] 3 parts aluminum silicate

[0053] 50 servings of clean tap water

[0054] The preparation method of coating is as follows:

[0055] (1) Dry the glass particles covered with copper plating layer at 50°C to make it powdery;

[0056] (2) Mix the conductive filler particles, water-based polyurethane resin, adipic acid, silicone oil, and purified water together, and grind them in a grinder for 10-20 minutes, so that the conductive filler particles are refined and each component is uniformly refined;

[0057] (3) After mixing evenly, add thickener aluminum silicate to adjust the viscosity of the paint.

Embodiment 3

[0059] The components of coating and the content (parts by weight) of each component are as follows:

[0060] 30 parts of water-based epoxy (type I) resin

[0061] 60 parts of graphite particles covered with nickel plating

[0062] Propylene Glycol Ether 4 parts

[0063] Cellulose ether 5 parts

[0064] 2 parts polyphosphate

[0065] 90 parts of purified water

[0066] The preparation method of coating is as follows:

[0067] (1) drying the graphite particles covered with nickel-plated layer at 70°C to make it powdery;

[0068](2) Mix the conductive filler particles, propylene glycol ether, polyphosphate ester, water-based epoxy (type I) resin, and purified water together, and grind them in a grinder for 10-20 minutes to refine the conductive filler particles and make the components uniform refinement;

[0069] (3) After mixing evenly, add thickener cellulose ether to adjust the viscosity of the paint.

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PUM

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Abstract

The composition of water emulsion electromagnetic wave shielding paint is composed of (by weight portion) 20-60 portions of water soluble film-forming resin, 20-60 portions of conducting filler, 30-100 portions of pure clean water, 1-5 portions of thickening agent and 1-5 portions of film-forming adjuvant, and its preparation process includes the following steps: (1) drying conducting filler, controlling temp. at 50-80 deg.C until the conducting filler is become into powder; (2). mixing the dried conducting filler together with film-forming adjuvant, film-forming resin and pure clean water orclean running water and grinding by using grinding machine; and (3) adding thickening agent and regulating the paint to make it have a certain viscosity.

Description

1. Technical field [0001] The invention belongs to the field of electromagnetic wave shielding paint, in particular to a water-based emulsion type electromagnetic wave shielding paint and a preparation method thereof. 2. Background technology [0002] Traditional electromagnetic wave shielding coatings use organic solvents as diluents. The disadvantages are: 1. Harmful substances will be volatilized during preparation and use, which will pollute the environment and damage human health; 2. Increase the cost. [0003] U.S. Patent Application No. 4556506, filed on December 3, 1985, discloses a water-based conductive composition prepared from bifunctional amphoteric particles, polyacrylamide, non-ionic surfactant, metal particles and water . The application documents of this patent only stated that the electromagnetic wave shielding performance of this water-based conductive composition is stable, and that the viscosity and dispersion have no obvious changes within two or three...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/33C09D133/02C09D163/00C09D167/00C09D175/04
Inventor 黄婉霞李洪武涂铭旌
Owner SICHUAN UNIV
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