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Non-toxic polyaniline modified anti-corrosive coating and preparation method thereof

An anti-corrosion coating, polyaniline technology, applied in anti-corrosion coatings, polyester coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor anti-corrosion performance of anti-rust pigments

Active Publication Date: 2010-02-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an environmentally friendly non-toxic polyaniline modified anti-corrosion coating and its preparation method, which solves the problem of the poor anti-corrosion performance of existing anti-rust pigments, and the harmful lead and chromic acid must be used in conjunction with the coating manufacturing process. salt paint problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Prepare polyaniline modified antirust pigment as follows:

[0059] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.5 mol / liter; the phytic acid is 0.5 mol / liter.

[0060](b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, the concentration of aniline after mixing is: 0.5 mol / liter. Stirring was continued for 0.5 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 325 mesh barium metaborate, and stir for 10 minutes, then pre-cool to 8°C.

[0061] (c) Prepare an aqueous solution of an oxidizing agent: select benzoyl peroxide as an oxidizing agent, and prepare a concentration of benzoyl peroxide of 1.5 mol / liter. Precool the aqueous solution of benzoyl peroxide to 8°C.

[0062] (d) Slowly add 500ml of solution (c) into 500ml of phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing barium metaborate within 10-30 ...

Embodiment 2

[0065] Prepare polyaniline modified antirust pigment as follows:

[0066] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.5 mol / liter; the phytic acid is 0.7 mol / liter.

[0067] (b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, and the concentration of aniline after mixing is: 1 mol / liter. Stirring was continued for 0.5 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 325 mesh zinc phosphate, and stir for 10 minutes, then pre-cool to 8°C.

[0068] (c) Prepare an aqueous solution of an oxidizing agent: select benzoyl peroxide as an oxidizing agent, and prepare a concentration of benzoyl peroxide of 1.5 mol / liter. Precool the aqueous solution of benzoyl peroxide to 8°C.

[0069] (d) Slowly add 500ml of solution (c) into 500ml of phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing zinc molybdate within 10-30 min...

Embodiment 3

[0072] Prepare polyaniline modified antirust pigment as follows:

[0073] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 1.5 mol / liter; the phytic acid is 0.1 mol / liter.

[0074] (b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, and the concentration of aniline after mixing is: 0.8 mol / liter. Stirring was continued for 0.5 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 325 mesh iron oxide red, and stir for 10 minutes, then pre-cool to 8°C.

[0075] (c) Prepare an aqueous solution of an oxidizing agent: select benzoyl peroxide as an oxidizing agent, and prepare a concentration of benzoyl peroxide of 1.5 mol / liter. Precool the aqueous solution of benzoyl peroxide to 8°C.

[0076] (d) Slowly add 500ml of the solution of (c) into 500ml of phosphoric acid, phytic acid and aniline mixed aqueous solution (b) containing iron oxide red within ...

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Abstract

The invention relates to coating technology, in particular to a non-toxic polyaniline modified anti-corrosive coating and a preparation method thereof to solve the problems that that prior antirust pigment has poor corrosion resistance, and the coating is matched with harmful lead-containing and chromate-containing pigment in the manufacturing process. The non-toxic polyaniline modified anti-corrosive coating comprises a film forming matter, polyaniline modified antirust pigment, and the like. A polyaniline coating layer is formed on the surface of the antirust pigment by an oxidative polymerization method; the antirust pigment after treatment has passivating effect on metal; and a phytic coating layer on the surface of the antirust pigment also has corrosion inhibiting effect on the metal. The non-toxic polyaniline modified anti-corrosive coating has strong corrosion resistance and permeability resistance, and can be applied to anti-corrosive projects such as petrochemical equipment,pipelines, offshore oil platforms, wharf facilities, shipping and the like.

Description

technical field [0001] The invention relates to paint technology, in particular to a non-toxic polyaniline modified anti-corrosion paint and a preparation method thereof. Background technique [0002] Lead-based and chromium-based pigments have excellent antirust properties and have been widely used in antirust paints for a long time. However, due to the environmental pollution and harm to the human body caused by lead and chromium elements, its application fields are strictly limited. The United States has banned the use of red lead since 1995, and non-toxic and efficient anti-rust coatings have become a research hotspot. Chinese patent CN1935907 reports a non-toxic or low-toxic antifouling coating prepared by utilizing the Chinese medicinal material Galla galla solvent extract. The coating includes resin base material, pigment, antifouling agent, lime rosin and various auxiliary agents. Contains gallnut solvent extract. Chinese patent CN1049368 discloses a non-toxic and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/04C09D161/06C09D163/00C09D175/04C09D127/12C09D123/28C09D115/02C09D17/00C09D5/08
Inventor 刘福春韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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