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, excellent Effect of coating film adhesion and antirust performance

Inactive Publication Date: 2006-03-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
  • 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 mentioned above, and the preparation of the primer has the following methods.

example 1

[0037] Example 1. The method for preparing polyaniline doped with phosphoric acid:

[0038] (1) Phosphoric acid doped polyaniline is first used to form phosphoric acid doped polyaniline, and then the conductive polymer of phosphoric acid doped polyaniline is combined with aluminum tripolyphosphate and phosphate antirust pigment, and then mixed with polyvinyl butyral Resin is made into, promptly obtains described primer.

[0039] Specific steps are as follows:

[0040] Dissolve the polyvinyl butyral resin into a 10% resin solution with a 3:1 mixed solvent of ethanol and butanol; take 130g of the 10% polyvinyl butyral solution, 1.95-8.45g of aluminum tripolyphosphate, phosphoric acid doped poly 0.13-6.5g of aniline, 2.6-5.9g of phosphate anti-rust pigment, 0.6-3.3g of talcum powder, 150ml of ethanol solvent, grind to make component A;

[0041] Take 10 g of 85% phosphoric acid, 8 g of distilled water, and 120 ml of a 3:1 mixed solvent of ethanol and butanol to form component B....

example 2

[0046] Example 2. The method of direct preparation with aniline:

[0047] Directly use small molecule aniline to form doped polyaniline through in-situ polymerization method at the same time of film formation, so that the conductive polymer of phosphoric acid doped polyaniline generated in situ can be combined with aluminum tripolyphosphate, phosphate antirust pigment and polyvinyl alcohol Butyral resin forms a coating of phosphoric acid doped polyaniline phosphating primer which has good rust protection properties.

[0048] The difference from Example 1 is that in component A, aniline is used instead of phosphoric acid to dope polyaniline, and a certain amount of chromic acid oxidant is added in component B. The chromic acid oxidizing agent includes: 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, polyaniline (PANI) has low intrinsic conductivity and good conductivity in acid-doped state. It is a new type of conductive polymer material. The acid-doped state is also called polyaniline salt. The development of polyaniline anti-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 steel surface, giving anodic protection, and also promoting the cathodic reaction (reduction of oxygen) to occur on the surface of the polyaniline primer layer, making the steel surface The anodic reaction on the surface ...

Claims

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Application Information

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Patent Type & Authority Applications(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
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