Conductive coating of anti lightning stroke and method for preparing the same

A kind of conductive paint and anti-lightning technology, applied in the direction of conductive paint, coating, etc., can solve the problems of increasing aircraft load, cumbersome, complex lightning protection devices, etc., to achieve improved electrical conductivity, good electrical conductivity, good adhesion. Effect

Inactive Publication Date: 2011-03-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the addition of aluminum skin and metal strips increases the load on the aircraft itself
And this lightning protection device is very complicated and loaded down with trivial details, has increased the manufacturing cost of aircraft

Method used

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  • Conductive coating of anti lightning stroke and method for preparing the same
  • Conductive coating of anti lightning stroke and method for preparing the same
  • Conductive coating of anti lightning stroke and method for preparing the same

Examples

Experimental program
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Effect test

preparation example Construction

[0020] The preparation steps of anti-lightning strike conductive coating are as follows:

[0021] 1) In terms of mass percentage, 35% to 70% of silver powder, 2.1% to 4.2% of cellulose acetate butyrate, 1.1% to 2.1% of dispersant, 12.7% to 33.1% of silicone resin, 1.9% ~5.0% dibutyl phthalate and 1.1%~3.0% defoamer are mixed, and then diluted with butyl acetate to a solid content of 40wt%~60wt%, and then fully ground to disperse the filler evenly;

[0022] 2) Add 7.9% to 20.7% of hexamethylene diisocyanate biuret polyurethane curing agent into the uniformly ground mixture, and continue to grind evenly to obtain a lightning-resistant conductive coating.

Embodiment 1

[0025] Weigh 8.5884g spherical silver powder, 5.1585g 10wt% cellulose acetate butyrate CAB-20 solution, 0.5535g Deqian 904s dispersant, 5.0085g Dow Corning 840 silicone resin, 0.4715g dibutyl phthalate and 0.0506 g Deqian 6800 defoamer, mix them with each other, and then dilute it with butyl acetate until the solid content is within the range of 40wt% to 60wt%, and then grind it sufficiently to make the filler disperse evenly. Then weigh 2.4925g of 75wt% Bayer N75 curing agent solution and add it to the homogeneously ground mixture, and continue grinding. After the pre-curing reaches the construction viscosity, the prepared anti-lightning strike conductive coating is applied to the surface of the sample. After fully drying, the mass percentage of the spherical silver powder in the coating is about 60%, and the measured resistivity of the coating is about 0.11 Ohm·cm. At the same time, the conductive paint pre-cured to meet the construction viscosity requirement was brush-coat...

Embodiment 2

[0027] Take by weighing 0.6438g spherical silver powder, 0.3845g 10wt% cellulose acetate butyrate CAB-20 solution, 0.0223g Deqian 904s dispersant, 1.0123g Dow Corning 840 silicone resin, 0.0987g dibutyl phthalate and 0.0530g Deqian 6800 defoamer, mix them with each other, and then dilute it with butyl acetate until the solid content is within the range of 40wt% to 60wt%, and then grind it sufficiently to make the filler disperse evenly. Then weigh 0.5013g of 75wt% Bayer N75 curing agent solution and add it to the homogeneously ground mixture, and continue grinding. After pre-curing reaches the construction viscosity, apply the prepared anti-lightning strike conductive coating on the surface of the sample. After fully drying, the mass percentage of the spherical silver powder in the coating is about 35%, and the measured resistivity of the coating is about 102.47 Ohm·cm.

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Abstract

The invention discloses a conductive coating of anti lightning stroke and method for preparing the same, which belongs to the field of functional paint and preparation thereof. The method for preparing the conductive coating of anti lightning stroke is as follows: (1) 35%-70% of silver powder, 2.1%-4.2% of cellulose acetate-butyrate, 1.1%-2.1% of dispersant, 12.7%-33.1% of silicone resin, 1.9%-5.0% of dibutyl phthalate and 1.1%-3.0% of antifoaming agent are mixed by mass and the obtained mixture is diluted to 40wt%-60wt% solid content with butyl acetate; Then the mixture is fully grinded to make the packing thereof well dispersed;(2) 7.9%-20.7% curing agent of hexamethylene diisocyanate biuret polyurethane is added to the above mixture. Grind the mixture thoroughly to obtain the conductive coating of anti lightning stroke. The above coating not only has good conductivity and thermal conductivity, but also has the characteristics of impact resistance, heat resistance, good adhesion and stability of polymer coating matrix. As a result, the coating provided by the invention is applicable to the lightning stroke protection for airplanes and oil tanks.

Description

technical field [0001] The invention relates to the field of preparation of functional coatings, in particular to a lightning-resistant conductive coating and a preparation method thereof. Background technique [0002] Generally, aerospace vehicles generally operate in complex and harsh environments, so strict protection is required. Aircraft and other spacecraft travel to and from the atmosphere, so lightning has inevitably become a major hidden danger to the safe flight of aircraft and other spacecraft. Aircraft and other spacecraft usually need to install conductive devices to provide anti-lightning protection. The traditional lightning protection measures for aircraft are to cover the surface of the aircraft with aluminum skin or paste conductive metal strips to provide lightning protection for personnel and equipment in the cabin. But the addition of aluminum skins and metal strips increases the load on the aircraft itself. And this lightning protection device is ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D5/24
Inventor 颜光清王立俞豪杰李晓晓
Owner ZHEJIANG UNIV
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