A kind of preparation method of water-based anticorrosion coating

An anti-corrosion coating, water-based technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as high water conductivity, metal corrosion, flash corrosion, etc., achieve good weather resistance and corrosion resistance, and avoid agglomeration , the effect of increasing the cross-linking density

Active Publication Date: 2017-06-09
SHENYANG SHUNFENG IND GRP CO LTD
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Problems solved by technology

However, the high conductivity of water makes it easy to corrode metals, and flash corrosion is prone to occur during the drying process of the coating film. Although the use of flash rust inhibitors and fillers can effectively solve this problem, most of the flash rust inhibitors are heavy metals. inconsistent with low-pollution goals

Method used

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  • A kind of preparation method of water-based anticorrosion coating
  • A kind of preparation method of water-based anticorrosion coating
  • A kind of preparation method of water-based anticorrosion coating

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Embodiment 1

[0026] 1. Preparation of N-carboxyethyl chitosan:

[0027] Add 4.0g chitosan (molecular weight less than 50,000) to 200mL water containing 2.8mL acrylic acid, and keep stirring for 2 days at 50°C. After the reaction is completed, add 1mol / L NaOH solution to the reaction mixture, adjust the pH value of the solution to 10, and convert all the carboxylic acids into sodium salts. Pour the mixed solution into acetone for reprecipitation, then dialyze in aqueous solution (dialysis membrane molecular weight cut-off is 8000-12000g / mol), remove unreacted acrylic acid. After two days of dialysis, lyophilization yielded 3.6 g of N-carboxyethyl chitosan.

[0028] 2. Preparation of chitosan / nano zinc oxide composite material:

[0029] Add 3.6 g of the obtained N-carboxyethyl chitosan into 300 mL of deionized water, stir vigorously at room temperature for 0.5 h, and fully dissolve to obtain a water-soluble chitosan solution. The above-mentioned water-soluble chitosan solution and nano-zi...

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Abstract

A preparation method for an aqueous anticorrosion coating, relates to a preparation method for a coating, and concretely relates to a preparation method for a chitosan / nanometer zinc oxide composite material filled aqueous epoxy resin. The chitosan / nanometer zinc oxide composite material is prepared by performing blending modification on nanometer zinc oxide and chitosan. Nanometer zinc oxide possesses obvious anti-ageing performance and anti-ultraviolet characteristic, the agglomeration problem of nanometer zinc oxide is solved by preparing the composite material from nanometer zinc oxide and chitosan, and also the amino at the chitosan monomer molecule is capable of reacting with epoxy resin, and the filling material can be tightly combined with epoxy resin. The method helps to improve the outdoor weatherability of aqueous epoxy resin, the aqueous epoxy resin is safe, environment-friendly and non-toxic, electrochemical corrosion is alleviated, anticorrosion period is prolonged, the crosslinking density of the aqueous epoxy resin is enhanced, and the anticorrosion performance of the aqueous epoxy resin is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of architectural paint, in particular to a preparation method of water-based anticorrosion paint. Background technique [0002] Anti-corrosion coatings have attracted more and more attention, and now the international anti-corrosion work has entered a white-hot stage. At present, my country's anti-corrosion coatings are advancing in the direction of high performance, high efficiency, low energy consumption and low pollution, and water-based coatings have attracted more and more attention. Among them, water-based epoxy coatings are widely used because of their excellent properties of acid and alkali resistance, wear resistance and high hardness. However, the high conductivity of water makes it easy to corrode metals, and flash corrosion is prone to occur during the drying process of the coating film. Although the use of flash rust inhibitors and fillers can effectively solve this problem, most of the flash ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08C08B37/08
Inventor 王娜张义男张静亢萍
Owner SHENYANG SHUNFENG IND GRP CO LTD
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