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A polyaniline powder coating with acid-resistant self-healing function and preparation method thereof

A technology of powder coating and polyaniline, applied in the field of coatings, can solve the problems of undiscovered powder coating products, and achieve the effect of ensuring self-healing performance, fast curing, and high cross-linking density

Inactive Publication Date: 2016-02-10
TIANJIN XIANGSHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, no powder coating products that meet the above functions have been found in China

Method used

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  • A polyaniline powder coating with acid-resistant self-healing function and preparation method thereof
  • A polyaniline powder coating with acid-resistant self-healing function and preparation method thereof
  • A polyaniline powder coating with acid-resistant self-healing function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A polyaniline powder coating with acid resistance and self-healing function, its raw material constituents and their weight parts are:

[0053]

[0054] The steps of the preparation method of the polyaniline powder coating with acid resistance and self-repair function are as follows:

[0055] (1) Preparation of polyaniline:

[0056] ①Synthesis process of polyaniline by emulsion polymerization: Add aniline and dodecylbenzene (the ratio of the two substances is 2:1) into the reactor, and add water and xylene (both are just solvents) after mixing. , Do not participate in the reaction, just an appropriate amount), stir well until a transparent emulsion is obtained;

[0057] ②Then add ammonium persulfate (NH 4 ) 2 S 2 O 8 Aqueous solution (the ratio of ammonium persulfate to aniline is 1:1), the color of the system gradually darkens, keep the temperature of the system at 0~20℃, continue to stir for 30 minutes, and stand still for 24 hours, then add a proper amount of acetone Milk i...

Embodiment 2

[0063] A polyaniline powder coating with acid resistance and self-healing function, its raw material constituents and their weight parts are:

[0064]

[0065] The preparation method of the above-mentioned polyaniline powder coating with acid resistance and self-healing function is the same as that of Example 1.

Embodiment 3

[0067] A polyaniline powder coating with acid resistance and self-healing function, its raw material constituents and their weight parts are:

[0068]

[0069] The preparation method of the above-mentioned polyaniline powder coating with acid resistance and self-healing function is the same as that of Example 1.

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Abstract

The invention relates to a polyaniline powder paint with acid-resistant self-repair function, which is prepared from the following components in parts by weight: 450-550 parts of special-type epoxy resin, 80-140 parts of curing agent, 5-100 parts of polyaniline, 200-250 parts of pigment and filler and 30-50 parts of assistant. The coating of the powder paint containing a certain amount of polyaniline is subjected to anodization reaction under acidic conditions, and quickly recovers the surface passivation layer; even if corrosive substances permeate, the passivation layer can be used as a second barrier to inhibit the corrosion, thereby ensuring the corrosion resistance and self-repair property of the coating; and the powder paint has the characteristics of obviously higher bending resistande and flexibility, high corrosion resistance and high scratch resistance. By organically combining the isolation property of a common paint and the self-repair passivation characteristic of polyaniline, the powder paint implements thick coating at one time, is simple for construction, and avoids the hidden danger of spot corrosion from the damaged point after the coated workpiece is damaged in the construction process; and the adhesive force and corrosion resistance of the coating satisfy the correlation detection in Chinese Standard.

Description

Technical field [0001] The invention belongs to the field of coatings, and relates to decorative powder coatings, in particular to a polyaniline powder coating with acid resistance and self-repairing function and a preparation method thereof. Background technique [0002] In 1985, DeBerry discovered that in acidic media, electrochemically synthesized polyaniline film can passivate the surface of stainless steel and prevent corrosion. This feature has attracted people’s attention. Since then, conductive polymers have been used in the field of corrosion protection. Membrane application research. [0003] In 1991, the Los Alamos National Laboratory (IANL) and the National Aeronautics and Space Administration (NASA) of the United States reported the anti-corrosion effect of conductive polyaniline on low-carbon steel. The Kennedy Space Launch Center of NASA is located in a severely corroded Coastal areas, where the air is humid and salt spray corrosion is serious, and each rocket launc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D163/04C09D179/02C09D7/12C09D5/08C08G73/02
Inventor 王焱段光远陈超
Owner TIANJIN XIANGSHENG NEW MATERIALS CO LTD