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Polyaniline anti-corrosive paint

An anti-corrosion coating, polyaniline technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings and other directions, can solve the problems of large amount of polyaniline, limited promotion and application, easy foaming, etc., and achieve the effect of good anti-corrosion performance

Inactive Publication Date: 2014-06-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main types of polyaniline anti-corrosion coatings: one is polyaniline coating formed by electrochemical polymerization, but this method is not suitable for on-site construction and anti-corrosion treatment of large metal parts, so its application is limited; the other is polyaniline coating Aniline is blended with commonly used film-forming resins to prepare composite coatings. This method overcomes the shortcomings of electrochemical polymerization methods and has become the main direction of research on polyaniline anti-corrosion coatings.
[0004] The film-forming resin of polyaniline anti-corrosion coatings is mainly epoxy resin. Studies such as Cao Jingyi have shown that polyaniline epoxy anti-corrosion coatings have excellent anti-rust effects, and the amount of polyaniline is controlled between 10wt% and 20wt% of the total solids. The time is relatively reasonable; the amount of polyaniline used in the polyaniline anti-corrosion coating is relatively large, the scratch resistance test is easy to foam, and the cost of the coating is high, thus limiting the popularization and application of this polyaniline anti-corrosion coating
The application number is 201010526285.4. Although the Chinese patent provides a phosphate-doped polyaniline anti-corrosion coating, it can achieve scratch resistance by using no more than 5% polyaniline content in the salt spray test for 1000 hours. The rust does not expand and the board surface does not bubble. performance, but polyaniline is micron-scale dispersed in the system, and its coating film thickness is required to reach 150 microns, so that there are problems such as thick coating and high cost in popularization and application

Method used

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preparation example Construction

[0052] The preparation method of the polyaniline anticorrosion coating described in the application is a method well known to those skilled in the art. As a preferred solution, the preparation method of the polyaniline anticorrosion coating described in the application is specifically:

[0053] Stir the epoxy resin, diluent and phosphoric acid-phosphate ester doped polyaniline for 0.5h to 2h to obtain the first mixture;

[0054] Mixing and stirring the first mixture, additives, fillers and pigments except mica iron oxide, sand-milling and filtering, mixing the obtained filtrate with mica iron oxide, and obtaining component A after stirring;

[0055] Mix component A and component B to obtain polyaniline anticorrosion coating.

[0056] The application provides a polyaniline anti-corrosion coating, which includes component A and component B, and the component A includes epoxy resin, phosphoric acid-phosphoric acid ester doped polyaniline, pigment, filler, diluent and auxiliary ag...

Embodiment 1

[0059] Mix phosphoric acid and phosphoric acid ester with structural formula (I) in a molar ratio of 0.1:1 to obtain a phosphoric acid-phosphoric acid ester dopant, and then mix it with intrinsic polyaniline and water in a molar ratio of 0.5:1:40. Soak in water for 6 hours, filter, wash with water until the filtrate is neutral, and dry the filter cake in an oven to obtain phosphoric acid-phosphoric acid ester doped polyaniline.

[0060]

[0061] Among them, m is 3.

[0062] Take by weighing 100 grams of epoxy resin E51, 150 grams of xylene, and 150 grams of n-butanol respectively and put them into a sand mill tank, and put into the above-mentioned phosphoric acid-phosphoric acid ester doped polyaniline powder 10 with stirring at a speed of 700 rpm. gram, stirred for 0.5 hour, then added 10 grams of dispersant BYK163, 180 grams of aluminum dihydrogen tripolyphosphate, 180 grams of zinc phosphate, and 50 grams of talcum powder under stirring, and stirred at a speed of 1800 rp...

Embodiment 2

[0065] Mix phosphoric acid and phosphoric acid ester with structural formula (II) at a molar ratio of 1:1 to obtain a phosphoric acid-phosphoric acid ester dopant, and then mix it with intrinsic polyaniline and water at a molar ratio of 0.1:1:45. Soak in water for 6 hours, filter, wash with water until the filtrate is neutral, and dry the filter cake in an oven to obtain phosphoric acid-phosphoric acid ester doped polyaniline.

[0066]

[0067] Among them, m is 1.

[0068] Take by weighing 200 grams of epoxy resin E44, 130 grams of xylene, and 120 grams of n-butanol respectively and put them into a sand mill tank, and put them into the above-mentioned phosphoric acid-phosphoric acid ester doped polyaniline powder for 30 minutes under stirring at a speed of 1000 rpm. grams, stirred for 1 hour, then added 10 grams of dispersant BYK163, 10 grams of leveling agent BYK358, 120 grams of aluminum dihydrogen tripolyphosphate, 100 grams of zinc phosphate, 40 grams of talcum powder, ...

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Abstract

The invention provides a polyaniline anti-corrosive paint. The polyaniline anti-corrosive paint comprises a component A and a component B, wherein, based on the polyaniline anti-corrosive paint, the component A comprises the following components in percentage by weight: 10wt%-20wt% of epoxy resin, 1wt%-5wt% of phosphoric acid-phosphate-doped polyaniline, 30wt%-50wt% of pigment, 5wt%-20wt% of filler, 20wt%-30wt% of diluting agent and 1wt%-3wt% of auxiliary agent; the component B comprises the following component in percentage by weight: 5wt%-15wt% of curing agent. The phosphoric acid-phosphate-doped polyaniline provided by the invention can reach the nano-scale dispersion degree in an anti-corrosive paint, a molecular chain hardly has an entanglement part so that each molecular chain segment group can play a role in the anti-corrosive paint, thus the polyaniline anti-corrosive paint provided by the invention can have better anti-corrosive properties under the condition of a lower thickness.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a polyaniline anti-corrosion coating. Background technique [0002] Metal corrosion problems widely exist in various sectors and industries of the national economy, and have caused great harm to the development of the national economy, people's lives and the social environment. In order to prevent losses caused by corrosion, countries all over the world have invested a lot of manpower and financial resources in various means for corrosion protection. [0003] Polyaniline is one of today's high-tech new materials with special functions. A large number of test results have proved that polyaniline coatings have excellent anti-corrosion capabilities for metals. At present, the development of polyaniline anti-corrosion coatings has become a new hot spot in the field of coatings research. There are two main types of polyaniline anti-corrosion coatings: one is polyanil...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D179/02C09D5/08C09D7/12
Inventor 孙杨吕金龙刘建李季王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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