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Preparation method of epoxy anticorrosive coating

An epoxy anti-corrosion coating, weight percentage technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of corrosion and corrosion medium seeping into the film, and achieve reduced viscosity, low cost, Effect of improving impact resistance

Inactive Publication Date: 2015-02-18
徐妍玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the film formation process, the pinholes left by the solvent volatilization will cause the corrosive medium to penetrate under the film and cause corrosion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of epoxy anticorrosion coating is:

[0017] (1) By weight, weigh 150g deionized water, 300g bisphenol A epoxy resin, 150g phenalkamine, 100g silicone, 85g polyurethane, 100g nitrile rubber, 5g dispersant, 4g defoamer, 4g anti-corrosion agent, and added to the dispersion tank together, dispersed and stirred at the speed of 300-500r / min in the dispersion tank for 5-10 minutes to obtain a mixture.

[0018] (2) Weigh 100g of flaky high wear-resistant pigments and fillers and 2g of leveling agent into the mixture, disperse and stir at the speed of 1000-1500r / min in the dispersion tank for 10-15 minutes to obtain an epoxy anti-corrosion coating. The flaky high wear-resistant pigments and fillers consist of 320 mesh glass flakes with a content of 2g, 160 mesh glass flakes with a content of 3g and sericite powder with a content of 5g.

Embodiment 2

[0020] The preparation method of epoxy anticorrosion coating is:

[0021] (1) By weight, weigh 160g deionized water, 400g bisphenol A epoxy resin, 80g phenalkamine, 50g silicone, 50g polyurethane, 120g nitrile rubber, 9g dispersant, 8g defoamer, 8g anticorrosion agent, and added to the dispersion tank together, dispersed and stirred at the speed of 300-500r / min in the dispersion tank for 5-10 minutes to obtain a mixture.

[0022] (2) Weigh 110g of flaky high wear-resistant pigments and fillers and 5g of leveling agent into the mixture, disperse and stir at the speed of 1000-1500r / min in the dispersion tank for 10-15 minutes to obtain an epoxy anti-corrosion coating. The flaky high wear-resistant pigments and fillers consist of 320 mesh glass flakes with a content of 2g, 160 mesh glass flakes with a content of 3g and sericite powder with a content of 6g.

Embodiment 3

[0024] The preparation method of epoxy anticorrosion coating is:

[0025] (1) By weight, weigh 150g deionized water, 300g bisphenol A epoxy resin, 80g phenalkamine, 50g silicone, 100g polyurethane, 120g NBR, 9g dispersant, 8g defoamer, 8g anticorrosion agent, and added to the dispersion tank together, dispersed and stirred at the speed of 300-500r / min in the dispersion tank for 5-10 minutes to obtain a mixture.

[0026] (2) Weigh 170g of flaky high wear-resistant pigments and fillers and 5g of leveling agent into the mixture, disperse and stir at the speed of 1000-1500r / min in the dispersion tank for 10-15 minutes to obtain an epoxy anti-corrosion coating. The flaky high wear-resistant pigments and fillers consist of 320 mesh glass flakes with a content of 4g, 160 mesh glass flakes with a content of 6g, and sericite powder with a content of 7g.

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Abstract

The invention discloses a preparation method of an epoxy anticorrosive coating. The preparation method comprises the following steps: (1) weighing the following components respectively in percentage by weight: 15-23% of deionized water, 30-40% of bisphenol A epoxy resin, 8-15% of phenolic amine, 5-10% of organic silicon, 5-10% of polyurethane, 10-18% of nitrile-butadiene rubber, 0.5-0.9% of a dispersant, 0.4-0.8% of a defoaming agent and 0.4-0.8% of a preservative, and dispersing and stirring to obtain a mixture; (2) weighing 10-17% of flaky highly-wear-resistant color filler and 0.2-0.5% of a leveling agent to be added into the mixture, and dispersing for 10-15 minutes in a dispersion tank at a rotation speed of 1000-1500r / min. By adopting the preparation method disclosed by the invention, the epoxy anticorrosive coating with good anticorrosive performance, good impact resistance, good toughness and good high-temperature resistance can be prepared, and the process is simple.

Description

technical field [0001] The invention relates to a preparation method of epoxy anticorrosion paint. Background technique [0002] There are three main functions of anti-corrosion coatings: the shielding effect of paint film and sheet pigment, the corrosion inhibition and passivation effect of alkaline or oxidative pigments, and the electrochemical protection effect of zinc powder. Among them, the shielding effect that can isolate corrosive media such as water, oxygen, and ions is the most critical. At present, most of the commonly used marine heavy-duty anti-corrosion coatings are solvent-based coatings. During the film formation process, the pinholes left by the solvent volatilization will cause the corrosive medium to penetrate under the film and cause corrosion. The resulting corrosion product expands and breaks the coating, allowing the corrosive medium to diffuse, eventually causing the coating to flake off and fail. In addition, for the coating layer in special occas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D109/02C09D175/04C09D183/04C09D5/08C09D7/12C08G59/40
CPCC09D163/00C08G59/50C08L2205/03C09D5/08C09D7/40C09D7/61C09D7/63C09D7/70C08L75/04C08L9/02C08K5/17C08K7/00C08K3/40C08K3/34
Inventor 徐妍玲
Owner 徐妍玲
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