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Phthalocyanine-based sulfonic acid-doped polyaniline anticorrosive paint

A phthalocyanine-based sulfonic acid and anti-corrosion coating technology, applied in the coating field, can solve the problems of de-doping coating process, complexity, low conductivity, etc., and achieve the effects of good water solubility, simple preparation, and improved conductivity

Active Publication Date: 2014-06-11
四川宇涂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low electrical conductivity, dedoping phenomenon and complex coating process of existing polyaniline anticorrosion coatings, the present invention provides a phthalocyanine-based coating that effectively overcomes dedoping phenomenon, is simple to prepare, has good adhesion, and has excellent anticorrosion performance. Sulfonic acid doped polyaniline anticorrosion coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] 3) Preparation of polyaniline anti-corrosion coating: at room temperature, mix phthalocyanine sulfonic acid-doped polyaniline, aqueous epoxy resin solution, leveling agent and defoamer, and disperse at 1500 r / min for 10 minutes. Filter, add curing agent and diluent and mix thoroughly to obtain the required anti-corrosion coating; wherein, the viscosity of the aqueous epoxy resin solution is 400mPa s, the solid content is 38-42%, and the pH is 7 ~ 9; phthalocyanine sulfonic acid doped The volume ratio of polyaniline, water-based epoxy resin solution, leveling agent, defoamer, curing agent and thinner is 9~18: 70~90: 0.25~0.45: 0.5~1.5: 1~2: 30~50.

[0022] Among them, the leveling agent is one of the BYK-3xx series produced by BYK Chemical Company, the curing agent is methyl etherified melamine formaldehyde resin, the defoaming agent is simethicone or BYK-020, BYK-028, and the diluent is One of ethylene glycol methyl ether, ethylene glycol ethyl ether or ethylene glycol ...

Embodiment l

[0026] 1) Synthesis of intrinsic polyaniline

[0027]Weigh 10 ml of aniline monomer into a three-necked flask, then add 200 ml of 1 mol / l hydrochloric acid, stir for 5 minutes, add 50 ml of xylene, and stir for about 30 minutes to form a uniform milky white emulsion; slowly drop into the system Add 30 ml of an aqueous solution containing 12 g of ammonium persulfate, react at 15°C for 5 hours, filter under reduced pressure after breaking the emulsion, and wash with distilled water until the filtrate is colorless. The filtered product was treated with 350 ml of 8% ammonia water for 16 hours, the pH value was 8, filtered under reduced pressure, and the filter cake was vacuum-dried at 45°C to constant weight to obtain blue intrinsic state polyaniline.

[0028] 2) Synthesis of polyaniline doped with copper phthalocyanine sulfonic acid

[0029] Dissolve 10 g of intrinsic polyaniline in 50 ml of N,N-dimethylformamide (DMF), then add 130 ml of an aqueous solution containing 20 g of c...

Embodiment 2

[0033] 1) Synthesis of intrinsic polyaniline

[0034] Weigh 10 ml of aniline monomer into a three-necked flask, then add 220 ml of 1 mol / l hydrochloric acid, stir for 5 minutes, add 55 ml of xylene, and stir for about 30 minutes to form a uniform milky white emulsion; slowly drop into the system Add 30 ml of an aqueous solution containing 13.5 g of ammonium persulfate, react at 14°C for 5 hours, filter under reduced pressure after breaking the emulsion, and wash with distilled water until the filtrate is colorless. The filtered product was treated with 350 ml of 8% ammonia water for 16 hours, the pH value was 8, filtered under reduced pressure, and the filter cake was vacuum-dried at 45°C to constant weight to obtain blue intrinsic state polyaniline.

[0035] 2) Synthesis of polyaniline doped with copper phthalocyanine sulfonic acid

[0036] Take 10 g of intrinsic state polyaniline and dissolve it with 50 ml of DMF, then add 150 ml of an aqueous solution containing 25 g of c...

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PUM

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Abstract

The invention discloses phthalocyanine-based sulfonic acid-doped polyaniline anticorrosive paint which is prepared by the following method: (1), synthesizing eigenstate polyaniline; (2), synthesizing phthalocyanine-based sulfonic acid-doped polyaniline: taking and sufficiently dissolving the eigenstate polyaniline with N, N-dimethyl formamide, then, adding phthalocyanine-based sulfonic acid liquor, washing by using distilled water until filtrate is colorless after reacting for 10 hours-15 hours at 60 DEG C-70 DEG C, and vacuum-drying solids to obtain the phthalocyanine-based sulfonic acid-doped polyaniline; and (3), preparing polyaniline anticorrosive paint: under the room temperature, mixing the phthalocyanine-based sulfonic acid-doped polyaniline, aqueous epoxy resin liquor, a flatting agent and a de-foaming agent, dispersing for 10 minutes under 1500r / minute, filtering, and adding a curing agent and a diluent for sufficiently mixing to obtain the needed anticorrosive paint. The phthalocyanine-based sulfonic acid-doped polyaniline anticorrosive paint disclosed by the invention can effectively overcome a de-doping phenomenon, is simple to operate, good in adhesion force and excellent in corrosion resistance.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a polyaniline anti-corrosion coating doped with phthalocyanine sulfonic acid, which can be used for anti-corrosion treatment of iron-based materials and belongs to the technical field of coatings. Background technique [0002] In 1985, De Berry discovered that polyaniline has a protective effect on iron-based metals. After the metal surface is coated with polyaniline paint, it can effectively prevent air, water and salt from acting, and prevent metal from rusting and corroding, and this paint is non-toxic. , low dosage, low density, good compatibility with organic resins, easy to use, has incomparable characteristics of ordinary coatings, such as anti-scratch, anti-pitting and anti-adhesion of marine organisms. Anti-corrosion application of aniline coatings under harsh conditions, such as navigation, aerospace and other fields. [0003] The preparation of polyaniline anti-corrosion c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D179/02C09D5/08C08G73/02
Inventor 李明田杨瑞嵩王莹附青山崔学军金永中
Owner 四川宇涂科技有限公司
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