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Anticorrosion paint containing aniline copolymer and its preparation and use

An aniline copolymer and anti-corrosion coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings and other directions, can solve the problems of inability to achieve industrialization, inability to form large-area films, etc., and achieve a wide range of applications, improved solubility, The effect of good anti-corrosion performance

Inactive Publication Date: 2007-08-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the electrode area, it is impossible to form a large-area film, and it is almost impossible to realize industrialization in the actual anti-corrosion field.

Method used

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  • Anticorrosion paint containing aniline copolymer and its preparation and use
  • Anticorrosion paint containing aniline copolymer and its preparation and use
  • Anticorrosion paint containing aniline copolymer and its preparation and use

Examples

Experimental program
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preparation example Construction

[0034] The preparation method of the anticorrosion coating of N-ethylaniline / aniline copolymer, its step is:

[0035] (1) Synthesis of N-ethylaniline / aniline copolymer

[0036] Dissolve aniline and N-ethylaniline in 80mL reaction medium (such as 1.0mol / L hydrochloric acid solution) in a certain proportion, stir with a magnetic stirrer for 30 minutes to make it evenly dispersed, and then put it into the temperature in a water bath. Add 20 mL of an oxidizing agent solution (such as a hydrochloric acid solution of ammonium persulfate) dropwise into the monomer solution at a rate of 3 seconds, and stir while adding. Reacted at a constant temperature for 24h to obtain a dark green polymer. Subsequently, the reaction solution was filtered, washed with distilled water until the filtrate was colorless, and dried to obtain a doped polymer sample. For dedoped polymer samples, 0.2mol / L alkaline water (ammonia solution or NaOH solution) can be used for dedoping treatment, magnetically ...

Embodiment 1

[0050] Add 5.840mL of N-ethylaniline and 2.061mL of aniline (the molar ratio of the monomers is 20:80) into 80mL of 1mol / L hydrochloric acid reaction medium, place the reaction system in a water bath at 0-5°C, and pass 18.256g of the oxidizing agent over Dissolve ammonium sulfate in 20mL of 1.0mol / L hydrochloric acid aqueous solution, add this solution dropwise to the monomer solution, continue to react for 24 hours, filter, wash with distilled water until the filtrate is colorless, and dry to obtain doped N- Ethylaniline / aniline copolymer. The yield was 68.8%, and its conductivity was 3.36×10 -2 S / cm.

[0051] Move the doped N-ethylaniline / aniline copolymer obtained in Example 1 into a beaker, add ammonia water and magnetically stir for 24 hours, filter, then wash with a large amount of distilled water until neutral, filter, and dry to obtain the dedoped state N-ethylaniline / aniline copolymer with a conductivity of 1.95×10 -9 S / cm.

Embodiment 2～3

[0053] The preparation process of the copolymer is the same as in Example 1, changing the addition amount of the two monomers, adding 1.030mL N-ethylaniline and 6.57mL aniline (monomer molar ratio is 10:90) and 5.15mL N-ethylaniline respectively With 3.65mL aniline (monomer molar ratio is 50: 50), the yield of doping state N-ethylaniline / aniline copolymer is respectively 74.3% and 45.6%, and their electrical conductivities are respectively 9.64×10 -2 S / cm, 7.46×10 -7 S / cm. The corresponding conductivity of the dedoped N-ethylaniline / aniline copolymer is 5.05×10 -9 S / cm and 4.12×10 -10 S / cm.

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Abstract

The invention discloses a high- performance metal corrosion resistant paint and the method for preparing the same. The said aniline polymer- containing corrosion resistant paint is polymer organic solution formed by dissloving copolymer of aniline and N- alkylaniline into proper solvent. The utilization comprises following steps: brushing coating liquid on metal surface, drying, forming polymer coating after solvent volatilization, taking this ploymer coating as corrosion resistant priming coating, then adding epoxy resin coating on it as corrosion resistant surface coating. The invention is characterized in that it polymerizes aniline and N- alkylaniline and gets conductive corrosion resistant coating with better dissloving performance than polyaniline, and the adhesion force to steel plate is greatly increased and the corrosion resistant performance is aslo dramatically improved.

Description

technical field [0001] The invention relates to the technical field of a high-performance metal anticorrosion coating and a preparation method thereof. Background technique [0002] Since DeBerry discovered that polyaniline has excellent anticorrosion properties in 1985 (①DeBerry D W.Modification of the electrochemical and corrosion behavior of stainless steel with electroactive coating. Journal of the Electrochemcal Society, 1985, 132(5): 1022~1026.②DeBerry D W, Quaar Heds. Fundamental aspects of corrosion protection by surface modification. Proceedings·The Electrochemical Society, 1984; 84(3): 308~322), countries around the world have successively begun to study polyaniline as a metal surface anti-corrosion coating and mitigating agent. The reason why polyaniline anti-corrosion coatings arouse people's enthusiasm for research is that it has the following special advantages as an anti-corrosion coating: [0003] 1) Good compatibility with matrix polymer. In the current pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/02C09D5/08C09D163/00B05D7/14B05D1/36
Inventor 黄美荣桂运能李新贵邵洪涛
Owner TONGJI UNIV
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