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Preparation method of doped poly(2,3-dimethylaniline) and use of doped poly(2,3-dimethylaniline) in anticorrosion paint

A technology of dimethylaniline and basic coatings, applied in the application of anti-corrosion additives in anti-corrosion coatings, in the field of doped poly-2, which can solve problems such as unreported

Inactive Publication Date: 2015-06-10
QINGDAO HUICHENG PETROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 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 method of doped poly(2,3-dimethylaniline) and use of doped poly(2,3-dimethylaniline) in anticorrosion paint

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In a water bath at 10°C, add 50ml of distilled water, 8.2*10 -3 mol sulfuric acid and 1.6*10 -2 mol2,3-dimethylaniline, stir to mix evenly; dissolve 7.5g persulfuric acid in 25ml distilled water, slowly drop into the reaction system, and react for 9 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 6 hours, take it out and grind it to obtain sulfuric acid-doped P2,3-DMA powder. The molecular weight was measured by high performance liquid chromatography. The average molecular weight (weight average molecular weight) is 35428.

Embodiment 2

[0031] In a water bath at 40°C, add 50ml of distilled water, 2.5*10 -3 mol dodecylbenzenesulfonic acid and 1.6*10 -2 m0l 2,3-dimethylaniline, stir to make it evenly mixed; 7.5g persulfuric acid is dissolved in 25ml distilled water,

[0032] Slowly drop into the reaction system, and react under stirring for 9 hours; after the reaction, filter with suction, wash the filter cake with distilled water until the filtrate is free of

[0033]color; after the filter cake was dried in an oven at 60°C for 8 hours, it was taken out and ground to obtain P2,3-DMA powder doped with dodecylbenzenesulfonic acid.

Embodiment 3

[0035] In a water bath at 70°C, add 50ml of distilled water, 4*10 -2 mol camphorsulfonic acid and 1.6*10 -2 mol of 2,3-dimethylaniline, stir to make it evenly mixed; dissolve 1 passing sulfuric acid in 25ml distilled water, slowly drop into the reaction system, and react for 12 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 10 hours, it was taken out and ground to obtain camphorsulfonic acid-doped P2,3-DMA powder.

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Abstract

The invention provides a preparation method of a polyaniline derivative of which the phenyl ring contains an electron donating substituent, relates to a preparation method of an electron donating group-substituted doped poly(2,3-dimethylaniline) and provides a preparation method of a protonic acid-doped poly(2,3-dimethylaniline) and a use of the protonic acid-doped poly(2,3-dimethylaniline) in anticorrosion paint. The poly(2,3-dimethylaniline) is synthesized by a solution in-situ polymerization method, and the method comprises the following steps of adding distilled water, protonic acid and 2,3-dimethylaniline into a container, dissolving ammonium persulfate or sodium persulfate as an oxidizing agent in distilled water, slowly and dropwisely adding the solution into a reaction system, and after the reaction, carrying out pumping filtration, washing, drying and grinding to obtain doped poly(2,3-dimethylaniline) powder. The doped poly(2,3-dimethylaniline) improves polyaniline dissolvability and dispersibility and has anti-corrosive properties better that that of intrinsic polyaniline.

Description

technical field [0001] The invention relates to the preparation of polyaniline derivative poly2,3-dimethylaniline containing electron-donating substituents on the benzene ring, especially the preparation of doped poly2,3-dimethylaniline, and its use as an anti-corrosion additive 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 can be easily ...

Claims

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Application Information

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IPC IPC(8): C08G73/02C09D5/08
Inventor 周相勇孙晨林新超
Owner QINGDAO HUICHENG PETROCHEM TECH
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