Electromagnetic shielding waterborne paint and preparation method thereof

A technology of electromagnetic shielding and water-based coatings, applied in the direction of conductive coatings, coatings, etc., can solve the problems that cannot meet the requirements of architectural coatings, coatings are easy to crack, etc., achieve good physical and electromagnetic shielding performance, uniform coating, and reduce settlement sexual effect

Inactive Publication Date: 2011-04-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating obtained by low-molecular-weight resin will be brittle and easy to crack, which cannot meet the requirements of architectural coatings. Therefore, we choose high-molecular-weight and high-elasticity acrylic series emulsion to make the resulting coating film hard, with good adhesion, water resistance, Alkali resistance, durability and crack resistance

Method used

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  • Electromagnetic shielding waterborne paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The basic formula of the electromagnetic shielding water-based coating is as follows:

[0037] Component Component mass (g)

[0038] Pure acrylic emulsion 35

[0039] Flake silver-plated copper powder (silver content 5%) 30

[0040] Polycarboxylate sodium salt dispersant 2

[0041] Dialkyl Sulfosuccinate Wetting Agent 1

[0042] Non-ionic polyurethane leveling agent 1.5

[0043] mineral oil defoamer 1

[0044] Deionized water 29.5

[0045] The paint preparation method is as follows:

[0046] First, stir and dissolve the dispersant, wetting agent, and part of the defoamer in deionized water. After the dissolution is complete, add flake silver-plated copper powder for mixing, and stir at high speed to disperse for 20 minutes. Add pure acrylic emulsion to the mixture obtained above, and stir for 40 minutes. Finally, add the leveling agent and the remaining defoamer and stir for 5 minutes to obtain the electromagnetic shielding water-based coating.

[0047] Brush t...

Embodiment 2

[0049] The basic formula of the electromagnetic shielding water-based coating is as follows:

[0050] Component Component mass (g)

[0051] Pure acrylic emulsion 45

[0052] Flake silver-plated copper powder (silver content 20%) 25

[0053] Polycarboxylate ammonium salt dispersant 0.5

[0054] Dialkyl Sulfosuccinate Wetting Agent 1

[0055] Non-ionic polyurethane leveling agent 3

[0056] Silicone defoamer 0.5

[0057] Deionized water 25

[0058] The paint preparation method is as follows:

[0059] First, stir and dissolve the dispersant, wetting agent, and part of the defoamer in deionized water. After the dissolution is complete, add flake silver-plated copper powder for mixing, and stir at high speed to disperse for 15 minutes. Add pure acrylic emulsion to the mixture obtained above, and stir for 50 minutes. Finally, add the leveling agent and the remaining defoamer and stir for 5 minutes to obtain the electromagnetic shielding water-based coating.

[0060] Apply the...

Embodiment 3

[0061] The basic formula of the electromagnetic shielding water-based coating is as follows:

[0062] Component Component mass (g)

[0063] Styrene Acrylic Lotion 50

[0064] Flake silver-plated copper powder (silver content 25%) 20

[0065] Polycarboxylate sodium salt dispersant 0.8

[0066] Alkyl pyridinium chloride wetting agent 0.2

[0067] Silicone leveling agent 1.5

[0068] mineral oil defoamer 1

[0069] Deionized water 26.5

[0070] The paint preparation method is as follows:

[0071] First, stir and dissolve the dispersant, wetting agent, and part of the defoamer in deionized water. After the dissolution is complete, add flake silver-plated copper powder for mixing, and stir at high speed to disperse for 10 minutes. Add styrene-acrylic emulsion to the mixture obtained above, and stir for 40 minutes. Finally, add the leveling agent and the remaining defoamer and stir for 10 minutes to obtain the electromagnetic shielding water-based coating.

[0072] Apply th...

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Abstract

The invention discloses an electromagnetic shielding waterborne paint and a preparation method thereof, which belong to the field of electromagnetic shielding paints. The paint consists of the following components in percentage by weight: 30 to 50 percent of emulsion, 10 to 30 percent of flaky metal powder, 0.5 to 2 percent of dispersant, 0.2 to 1 percent of wetting agent, 0.5 to 3 percent of leveling agent, 0.5 to 1.5 percent of antifoaming agent and 25 to 40 percent of water. The preparation method comprises the following steps of: stirring and dissolving the dispersant, the wetting agent and a part of antifoaming agent in deionized water; mixing the flaky metal powder in solution and stirring at a high speed; adding the emulsion into the mixture, stirring and mixing; and adding the leveling agent and the remaining antifoaming agent into the mixture and stirring. The paint of the invention can achieve the shielding efficiency of between 60 and 85 dB in the frequency range of between 100 kHz and 1.5 GHz; and an obtained coating has basically invariable surface resistivity after being stored in a natural state for more than 6 months and is suitable for building systems and other electromagnetic protection systems with environmental protection requirements.

Description

technical field [0001] The invention belongs to the field of electromagnetic shielding paint, in particular to a high-performance electromagnetic shielding water-based paint and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, a series of problems such as electromagnetic interference, information leakage, and electromagnetic radiation pollution caused by electromagnetic radiation are gradually intensified. Therefore, there is an urgent need for systematic protection against electromagnetic radiation, and electromagnetic shielding technology is increasingly showing its importance. Electromagnetic shielding coatings are widely used because of their low cost and simple application. At present, the development of electromagnetic shielding coatings is mainly solvent-based. As people's requirements for environmental protection are getting higher and higher, it is becoming more and more urgent to research and develop p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D125/14C09D7/12C09D5/24
Inventor 毛倩瑾李桃安崔素萍聂祚仁王子明兰明章王亚丽沈文婷
Owner BEIJING UNIV OF TECH
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