Water polyurethane electric conduction paint containing carbon nano-tube and preparation method thereof

A water-based polyurethane and carbon nanotube technology, applied in the direction of polyurea/polyurethane coatings, conductive coatings, coatings, etc., can solve the problems of reduced conductivity and unsatisfactory shielding performance of coatings, and achieve the effect of excellent conductivity

Inactive Publication Date: 2008-04-23
SHANGHAI SAFEGREEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Prior art CN1775881A (2006.5.24) makes a kind of nano-carbon conductive coating with high stability with nano-carbon, organic silicon resin and organic solvent, but with CN1760294A (2006.4.19) and CN1730571A (2006.2.8) etc. Compared with that, the conductivity of the coating is reduced by 2 and 3 orders of magnitude respectively, it is not very ideal in terms of shielding performance, and it also uses 10-50% xylene

Method used

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  • Water polyurethane electric conduction paint containing carbon nano-tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Add 500 mg of multi-walled carbon nanotubes to 150 ml of a mixed strong acid solution consisting of concentrated sulfuric acid and concentrated nitric acid in a volume ratio of 3:1, ultrasonically oscillate for 4 hours, pour into deionized water, and stand for more than 12 hours, filter and wash with water To neutrality, then dry to obtain chemically etched carbon nanotubes; under the protection of nitrogen, place 400 mg of the above-mentioned carbon nanotubes with carboxylic acid in excess thionyl chloride to reflux for 36 hours, after the reaction is completed, distill under reduced pressure Remove excess thionyl chloride, and vacuum-dry to obtain acid-chlorinated carbon nanotubes; then disperse 200 mg of the above-mentioned acid-chlorinated carbon nanotubes in anhydrous acetone, and add 10 ml of The acetone solution of hexamethylenediamine, the dropping time is not less than 60 minutes, continuous reaction for 12 hours, centrifugal filtration and washing to neutrality,...

Embodiment 2

[0028] Same as Example 1, but the ratio of 100:12:1:100 to 100:20:1: 100.

Embodiment 3

[0030] Same as Example 1, but the ratio of 100:12:1:100 to 100:30:1: 100.

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Abstract

The present invention belongs to the field of chemical technology, and is especially one kind of conducting water soluble polyurethane paint containing carbon nanotube and its preparation process. The conducting paint is prepared through the first modifying carbon nanotube chemically for the surface to carry hydroxyl group, carboxyl group or amino group; the subsequent introducing to polyester polyol or isocyanate terminated polyurethane pre-polymer through chemical bonding and self-emulsifying to prepare water soluble polyurethane dispersoid containing carbon nanotube; and final adding deionized water and assistants through high speed stirring to obtain the conducting paint. The conducting paint can form coating with volume resistivity of 1x10<-5>-4x10<-4. ohm.cm, surface resistivity of 1x10<-1>-2x10<2> ohm, adhesion of 0 grade, shielding effectiveness of 70-85 dB, and long term stability, and has wide application.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a water-based polyurethane conductive coating containing carbon nanotubes and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of electronics and informatization, the popularity of electronic machines with built-in information micro-processing devices, and the increasing speed of CPU calculations, the resulting electromagnetic compatibility, information security and noise Pollution problems are also getting worse. At present, from domestic and foreign perspectives, one of the main solutions is to use electromagnetic radiation protection materials to protect radiation. Among all kinds of electromagnetic radiation protection materials, coatings are among the best due to their convenience, light weight, space-saving and integration with the substrate, and are widely used in the electromagnetic radiation pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/24C09D5/02C09D7/12
Inventor 杨正龙秦深浦鸿汀
Owner SHANGHAI SAFEGREEN TECH
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