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Phosphoric acid doped polyphenylamine phosphate priming paint and preparing process thereof

A technology of polyaniline phosphorus and polyaniline, which is applied in phosphoric acid-doped polyaniline phosphating primer and its preparation field, can solve the problems of large-area corrosion, volatilization and loss of hydrochloric acid dopant, etc., and achieves easy preparation, easy popularization, suitable effect on industrial production

Inactive Publication Date: 2008-01-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, polyaniline is commonly used as dopants such as hydrochloric acid and dodecylbenzenesulfonic acid. However, if these doped polyanilines are used with general coating resins to prepare anti-corrosion coatings, there will always be premature large-scale corrosion, and hydrochloric acid doping The agent will be gradually evaporated and lost; if a thin coat of precoat primer is formulated, more serious extensive rusting will occur

Method used

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  • Phosphoric acid doped polyphenylamine phosphate priming paint and preparing process thereof
  • Phosphoric acid doped polyphenylamine phosphate priming paint and preparing process thereof

Examples

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preparation example Construction

[0035] 2. Preparation of phosphoric acid doped polyaniline phosphating primer

[0036] The composition of the phosphoric acid doped polyaniline phosphating primer is as described above, and the primer is prepared by the following method.

example 1

[0037] Example 1. Preparation method of polyaniline doped with phosphoric acid:

[0038] (1) Phosphoric acid doped polyaniline first to form phosphoric acid doped polyaniline, then use phosphoric acid doped polyaniline conductive polymer with aluminum tripolyphosphate, phosphate antirust pigment, and then shrink with 10% polyvinyl alcohol The primer is obtained by mixing butyraldehyde solution.

[0039] Specific steps are as follows:

[0040] Dissolve the polyvinyl butyral resin into a 10% polyvinyl butyral solution with a 3:1 ethanol and butanol mixed solvent;

[0041] Take 130g 10% polyvinyl butyral solution, 1.95~8.45g aluminum tripolyphosphate, 0.13~6.5g phosphoric acid doped polyaniline, 2.6~5.9g phosphate antirust pigment, 0.6~3.3g talcum powder, ethanol solvent 150ml, grind to form A component;

[0042] Take 10 g of 85% phosphoric acid, 8 g of distilled water, 120 ml of a mixed solvent of 3:1 ethanol and butanol, and prepare component B.

[0043] When in use, the A componen...

example 2

[0047] Example 2. Direct preparation method with aniline:

[0048] Directly use small molecule aniline by in-situ polymerization to form doped polyaniline at the same time as the film, so that the conductive polymer of phosphoric acid doped polyaniline produced in situ can be combined with aluminum tripolyphosphate, phosphate antirust pigment and 10% The vinyl butyral solution forms a phosphoric acid-doped polyaniline phosphating primer coating, which has good anti-rust performance.

[0049] The difference from Example 1 is that aniline is used instead of phosphoric acid doped polyaniline in component A, and a certain amount of chromic acid oxidant is added to component B. The chromic acid oxidants include: chromic acid, chromic anhydride, sodium dichromate, ammonium dichromate, potassium dichromate and the like.

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Abstract

A phosphorizing priming paint of phosphoric acid doped polyphenylamine is composed of components A and B, and is prepared from the electrically conductive high-molecular material (phosphoric acid doped polyphenylamine), antirust phosphate pigments, and polyvinyl butyral resin. Its advantages are high adhesion and high antirust effect.

Description

Technical field [0001] The invention relates to the field of materials, in particular to a phosphoric acid doped polyaniline phosphating primer and a preparation method thereof. Background technique [0002] As we all know, the intrinsic state of polyaniline (PANI) has low conductivity, and the acid-doped state has good conductivity. It is a new type of conductive polymer material. The acid-doped state is also called polyaniline salt. Polyaniline is developed to prevent corrosion. Coating has become a new application field of polymer conductive materials, and it is also a new hot spot in the field of coating development and research in recent years. [0003] The conductive polyaniline in the coating is conducive to the formation of a stable metal oxide passivation film on the surface of the steel, which gives the anode protection effect, and also promotes the cathodic reaction (reduction of oxygen) to occur on the surface of the polyaniline primer layer. The anodic reaction on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D129/14C09D5/12
Inventor 张学敏郑化陈在红马定桂陈纪纲
Owner WUHAN UNIV OF TECH