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Preparation of doped poly-2,3-dimethylaniline and its application in anticorrosion coatings

A technology of dimethylaniline and basic coatings, which can be used in anti-corrosion coatings, polyester coatings, polyurea/polyurethane coatings, etc., and can solve the problems of doped P2,3-DMA that have not been reported.

Inactive Publication Date: 2011-12-14
绍兴贝斯美化工股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the method of doping and synthesizing doped P2,3-DMA with protonic acid is still rarely reported, and there is no report on the research of doped P2,3-DMA in the field of metal corrosion and protection.

Method used

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  • Preparation of doped poly-2,3-dimethylaniline and its application in anticorrosion coatings
  • Preparation of doped poly-2,3-dimethylaniline and its application in anticorrosion coatings
  • Preparation of doped poly-2,3-dimethylaniline and its application in anticorrosion coatings

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Experimental program
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Effect test

Embodiment 1

[0035] In a water bath at 10°C, add 50ml of distilled water, 8.2×10 -3 mol sulfuric acid and 1.6×10 -2 mol 2,3-dimethylaniline, stir to mix evenly; dissolve 7.5g of ammonium persulfate in 25ml of distilled water, slowly drop into the reaction system, and react for 9 hours under stirring; after the reaction, suction filter, and distilled water Wash the filter cake until the filtrate is colorless; after drying the filter cake in an oven at 60°C for 6 hours, take it out and grind it to obtain sulfuric acid-doped P2,3-DMA powder.

[0036] The molecular weight was measured by high performance liquid chromatography.

[0037] The average molecular weight (weight average molecular weight) was 35428.

Embodiment 2

[0039] In a water bath at 40°C, add 50ml of distilled water, 2.5×10 -3 mol dodecylbenzenesulfonic acid and 1.6×10 -2 mol 2,3-dimethylaniline, stir to mix evenly; dissolve 7.5g of ammonium persulfate in 25ml of distilled water, slowly drop into the reaction system, and react for 9 hours under stirring; after the reaction, suction filter, and distilled water The filter cake was washed until the filtrate was colorless; after the filter cake was dried in an oven at 60°C for 8 hours, it was taken out and ground to obtain dodecylbenzenesulfonic acid-doped P2,3-DMA powder.

Embodiment 3

[0041] In a water bath at 70°C, add 50ml of distilled water, 4×10 -2 mol camphorsulfonic acid and 1.6×10 -2 mol 2,3-dimethylaniline, stir to mix evenly; dissolve 13g of ammonium persulfate in 25ml of distilled water, slowly drop into the reaction system, and react for 12 hours under stirring; after the reaction, suction filter and wash with distilled water Filter the cake until the filtrate is colorless; after drying the filter cake in an oven at 60°C for 10 hours, take it out and grind it to obtain P2,3-DMA powder doped with camphorsulfonic acid.

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Abstract

The invention provides a method for preparing polyaniline derivatives containing electron-donating substituents on the benzene ring, relates to a method for preparing polyaniline-poly2,3-dimethylaniline substituted by electron-donating groups, and provides a protonic acid-doped Preparation method of poly-2,3-dimethylaniline and its application in anti-corrosion coatings. Disclosed is a method for synthesizing poly-2,3-dimethylaniline by solution in-situ polymerization, the method comprising: adding distilled water, protonic acid and 2,3-dimethylaniline to a container; adding sodium persulfate or persulfuric acid Ammonium is used as an oxidant, dissolved in distilled water, and slowly dropped into the reaction system; after the reaction is completed, suction filtration, washing, drying, and grinding can obtain doped poly-2,3-dimethylaniline powder. The poly-2,3-dimethylaniline provided by the invention improves the solubility and dispersibility of the polyaniline, and is better than the intrinsic state polyaniline in anticorrosion performance.

Description

technical field [0001] The present invention relates to the preparation of polyaniline derivatives containing electron-donating substituents on the benzene ring—poly 2,3 dimethylaniline, especially the preparation of doped poly 2,3 dimethyl aniline, and its use as an anti-corrosion additive in Application in anti-corrosion coatings. Background technique [0002] In the past few decades, the application of conductive polymers in the electronics industry has attracted great attention, such as: anti-electromagnetic interference shielding, electrostatic protection, etc. As a new type of functional polymer material, conductive polyaniline is widely used in secondary batteries, electrochromic elements, photodiodes and It has a wide range of applications in anti-corrosion and other fields. [0003] In the field of anti-corrosion, polyaniline (PANI) is mainly used as a slow-release agent to protect the coating. Due to the presence of C=N functional groups in the PANI molecule, it...

Claims

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Application Information

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IPC IPC(8): C08G73/02C09D7/12C09D5/08C09D163/00C09D175/04C09D161/06C09D167/08C09D133/04C09D193/00C09D191/00
Inventor 马利黄超群仁纪纲严俊单洪亮
Owner 绍兴贝斯美化工股份有限公司
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