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Water metal anticorrosive coating

A metal anti-corrosion and coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the application limitations of metal anti-corrosion coatings, environmental pollution and other problems, and achieve excellent anti-corrosion performance, convenient use, and excellent film performance. Effect

Inactive Publication Date: 2004-09-15
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polyaniline is generally only soluble in a small number of strong polarity, high boiling point solvents (such as N-methylpyrrolidone (NMP)), and needs high temperature curing, so that the existing metal anti-corrosion coatings with polyaniline as curing agent App is restricted
Recently, someone in China reported a preparation method of a solvent-free conductive polyaniline anti-corrosion coating, but it still needs a large amount of diluent, which also causes some pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 1.0g of aniline copolymer (1) to a mixture of 20ml of N-methylpyrrolidone (NMP) and 10ml of diethylenetriamine, start stirring, react at 140°C for 10h under reflux, and distill off excess NMP and diethylenetriamine, and the resulting condensate was formulated into an aqueous solution with an aniline copolymer content of 20%. The structure of aniline copolymer (1) is as follows:

[0024]

[0025] In the formula: y=0-1, n=100-200.

[0026] Get 15g of epoxy water emulsion (solid content is 38.5%), add 4g of curing agent aqueous solution prepared above, stir evenly, leave standstill after no foam, brush this coating on the steel plate surface through degreasing and derusting treatment with brush , the dry film thickness is controlled at about 100 μm, and cured at room temperature for 48 hours.

Embodiment 2

[0028] Add 1.0g of aniline copolymer (2) to a mixture of 30ml of N-N dimethylformamide (DMF) and 10ml of diethylenetriamine, start stirring, react at 140°C under reflux for 10h, and distill under reduced pressure. Remove excess DMF and diethylenetriamine, and prepare the obtained condensate into an aqueous solution with an aniline copolymer content of 20%.

[0029] The structure of aniline copolymer (2) is as follows:

[0030]

[0031] In the formula: y=0-1, n=5-50.

[0032] Get 15g of epoxy water emulsion (solid content is 38.5%), add 4g of curing agent aqueous solution prepared above, stir evenly, leave standstill after no foam, brush this coating on the steel plate surface through degreasing and derusting treatment with brush , the dry film thickness is controlled at about 100 μm, and cured at room temperature for 48 hours.

Embodiment 3

[0034] Add 1.0g of aniline copolymer (3) to a mixture of 30ml of dimethyl sulfoxide (DMSO) and 10ml of diethylenetriamine, start stirring, react at 140°C under reflux for 10h, and distill off excess DMSO and diethylenetriamine, and the resulting condensate was formulated into an aqueous solution with an aniline copolymer content of 20%.

[0035] The structure of aniline copolymer (3) is as follows:

[0036]

[0037] In the formula: y=0-1, n=5-50.

[0038] Get 15g of epoxy water emulsion (solid content is 38.5%), add 4g of curing agent aqueous solution prepared above, stir evenly, leave standstill after no foam, brush this coating on the steel plate surface through degreasing and derusting treatment with brush , the dry film thickness is controlled at about 100 μm, and cured at room temperature for 24 hours.

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Abstract

The invention refers to a kind of metal corrosion prevention paint, the paint uses aniline polymer which has carboxy on the molecular chain to carry on condensation reaction with fatty group polyatomic amine, the -COOH is condensed with amino group in polyatomic amine, the fatty group polyatomic amine is grated to the polyaniline molecular chain, produces a kind of water soluble polyamiline / fatty group polyatomic amine condensation compound type epoxy resin firming agent, the agent is built with water epoxy resin, thus gets a kind of metal corrosion protection paint, it can be applied to corrosion protection of ship, box, sea oil plat, nuclear power station.

Description

technical field [0001] The invention relates to a metal anticorrosion coating, in particular to a water-based metal anticorrosion coating. Background technique [0002] Metal corrosion is a very common material deterioration behavior in the material industry, which brings huge losses to the national economy every year. At present, the general coating system used for metal protection usually first treats the surface of the substrate with a corrosion inhibitor containing chromate or molybdate, followed by painting a zinc-rich primer as an anodic protection material, relying on the consumption of metal zinc to To achieve the purpose of anti-corrosion, the last is to brush the surface protective paint to isolate the primer from the external environment. This paint will release a lot of Zn during use 2+ and CrO 4 4- , causing serious pollution to the environment, especially the marine environment, so it is urgent to find a pollution-free green metal anti-corrosion coating. ...

Claims

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Application Information

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IPC IPC(8): C09D5/08C09D163/02
Inventor 王庚超苏静王青武李星玮
Owner EAST CHINA UNIV OF SCI & TECH
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