Surface modification method of conductive material and application of conductive material in polyacrylate paint

A technology of polyacrylate emulsion and conductive materials, which is applied in the direction of conductive coatings, coatings, fibrous fillers, etc., can solve the problems of delamination, poor electrical conductivity and mechanical properties of coatings, and short storage period of conductive coatings, and achieve improvement Effects of dispersion stability, improvement of interfacial binding properties, and reduction of the number of hydrophilic groups

Active Publication Date: 2020-10-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous research work, we added inorganic conductive materials (Chinese invention patent, the preparation method is the same as CN201710578196.6, CN201710578228.2 or CN201710594663.4) to water-based polyacrylate emulsion (Chinese invention patent, application number: 201810875363.8 and application No.: 201910336421.4), the prepared conductive coating has problems such as short storage period, delamination, etc., and poor conductivity and mechanical properties of the coating after curing

Method used

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  • Surface modification method of conductive material and application of conductive material in polyacrylate paint
  • Surface modification method of conductive material and application of conductive material in polyacrylate paint
  • Surface modification method of conductive material and application of conductive material in polyacrylate paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. At room temperature, while stirring, spray 0.3 kg of methyltrichlorosilane into 10.0 kg of attapulgite / polyaniline composite conductive powder (the preparation method is Chinese invention patent CN201710578196.6 Example 4); after spraying , quickly and continuously feed ammonia gas into the silane-modified conductive powder for 20 minutes of adsorption reaction, wherein the flow rate of ammonia gas is controlled to be 0.03 cubic meters per second, and the amino-functionalized modified conductive powder is obtained;

[0019] 2. Take 10 kg of amino-functionalized modified conductive powder and disperse it in 200 kg of deionized water. While stirring, add 0.2 kg of aminotrimethylene phosphonic acid to the system, continue to stir and react for 30 minutes, then filter and wash. Dry and pulverize at 60°C to obtain organic acid-modified conductive powder;

[0020] 3. Take 30 parts of polyacrylate emulsion (the preparation method is Chinese patent CN201810875363.8 Example 1...

Embodiment 2

[0022] 1. At room temperature, while stirring, spray 1.0 kg of 3-chloropropyl trichloride into 10.0 kg of three-dimensional attapulgite-mica-based conductive composite material conductive powder (the preparation method is Chinese invention patent CN201710594663.4 Example 1) Silane: After spraying, quickly and continuously feed ammonia gas into the silane-modified conductive powder for 35 minutes of adsorption reaction, wherein the flow rate of ammonia gas is controlled to be 0.065 cubic meters per second, and the amino functionalized modified conductive powder is obtained ;

[0023] 2. Take 10 kg of amino-functionalized modified conductive powder and disperse it in 50 kg of deionized water. While stirring, add 1.0 kg of aminotrimethylene phosphonic acid to the system, continue to stir and react for 60 minutes, then filter and wash. Dry and pulverize at 80°C to obtain organic acid-modified conductive powder;

[0024] 3. Take 50 parts of polyacrylate emulsion (preparation metho...

Embodiment 3

[0026] 1. At room temperature, while stirring, spray 0.65 kg of methyltrichlorosilane into 10.0 kg of attapulgite-mica / polyaniline conductive composite conductive powder (the preparation method is Chinese invention patent CN201710578228.2 Example 1); After spraying, rapidly and continuously feed ammonia gas into the silane-modified conductive powder for 30 minutes of adsorption reaction, wherein the flow rate of ammonia gas is controlled to be 0.1 cubic meters per second, and the amino-functionalized modified conductive powder is obtained;

[0027] 2. Take 10 kg of amino-functionalized modified conductive powder and disperse it in 100 kg of deionized water. While stirring, add 0.6 kg of aminotrimethylene phosphonic acid to the system, continue to stir and react for 45 minutes, then filter and wash. Dry and pulverize at 70°C to obtain organic acid-modified conductive powder;

[0028] 3. Take 40 parts of polyacrylate emulsion (preparation method is Chinese invention patent appli...

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Abstract

The invention relates to an organic surface modification method of inorganic composite powder, in particular, a surface modification method of a conductive material and application thereof in polyacrylate paint. According to the surface modification method of the conductive material and application thereof in polyacrylate paint, inorganic conductive powder is modified by adopting chlorosilane andthen modified by adopting a gas phase method, namely ammonia gas is introduced to aminate the inorganic conductive powder; the aminated inorganic conductive powder is further modified by adopting organic acid-amino trimethylene phosphonic acid; and the amino trimethylene phosphonic acid can react with amino groups on the surface of the inorganic conductive powder, so that the organic phosphonic acid modified inorganic conductive powder material. The modified inorganic conductive material is added into the polyacrylate paint, acidic groups on the surface of the modified conductive powder can becombined with polyacrylate film-forming resin molecular chains through chemical bonds, the crosslinking degree among the polyacrylate molecular chains is improved, and the dispersion stability of thepaint and the conductivity and mechanical properties of a coating of the paint are improved on the whole.

Description

technical field [0001] The invention relates to a novel organic surface modification method of an inorganic composite powder, in particular to an organic surface modification method of an inorganic conductive powder and a preparation method thereof. Background technique [0002] Conductive coatings can be used for surface coating of products such as plastics, rubber, synthetic fibers and glass, and are widely used in industries such as automobiles, home appliances, electronic instruments, packaging and building materials. The currently used conductive coatings usually add inorganic conductive materials to insulating polymers (film-forming resins), so that the coating after curing to form a film has conductive properties. The key technical problem is that the interfacial bonding ability between the inorganic conductive material and the film-forming resin greatly affects the stability, dispersion, electrical conductivity and mechanical properties of the coating (layer). At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/08C09D5/24C09D155/00C09D187/00
CPCC08K2201/001C09C1/28C09C3/08C09D5/24C09D155/00C09D187/00C08L79/02C08K9/06C08K9/04C08K9/02C08K3/346C08K3/34
Inventor 左士祥姚超陈群刘文杰汪信李霞章周铭卓仲标郭小平岳晓峰徐勤力
Owner CHANGZHOU UNIV
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