Preparation method of waterborne epoxy composite anticorrosive coating

A technology of anti-corrosion coatings and water-based epoxy, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of decreased strength and barrier properties, and achieves improved anti-corrosion and strength, high stability, and brushing The effect of process simplification

Inactive Publication Date: 2015-09-02
蓬莱禄源漆业有限公司
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Problems solved by technology

However, in practical applications, water-based epoxy resins also have certain deficiencies, such as the decrease in strength caused by water-based, and the decrease in barrier properties. Therefore, it is urgent to develop a new water-based composite coating

Method used

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  • Preparation method of waterborne epoxy composite anticorrosive coating
  • Preparation method of waterborne epoxy composite anticorrosive coating

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Embodiment 1

[0026] (1) Zeolite grafted graphene:

[0027] 1) Amination of zeolite: Put 4g of zeolite into 50ml of organic solvent, heat up to 80°C under stirring, then add 6ml of silane coupling agent, continue to reflux for 8h, cool to room temperature, wash and filter, and heat up to 80°C in hot air at 60°C medium dry;

[0028] 2) Integration of zeolite and graphene: Ultrasonic dispersion of reduced graphene in 100ml distilled water. A 10mmol / 5mmol EDC / NHS aqueous solution was prepared and added to the dispersed graphene. After activation for 0.5 hours, an aminated zeolite was added, stirred at room temperature for 6 hours, and centrifugally dried to obtain graphene grafted with zeolite.

[0029] (2) Preparation of anti-corrosion coating:

[0030] 1) Take 100 parts of water-based epoxy resin and 100 parts of water,

[0031] 2) Take 35 parts of zeolite-grafted graphene filler, add it to the above resin system, and disperse it in a ball mill for 1 hour. 3) Take 50 parts of water-based...

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Abstract

The invention provides a preparation method of a waterborne epoxy composite anticorrosive coating and relates to a preparation method of a composite coating material. The waterborne epoxy composite anticorrosive coating provided by the invention is prepared by adopting carbodiimide (EDC) mediated condensation reaction to integrate zeolite and graphene, and then filling the integrated zeolite and graphene into waterborne epoxy resin. By adopting the method, the characteristics of more pore passages and large specific surface area of zeolite are combined with high strength and electron mobility of graphene; corrosive particles can be blocked from passing through a coating layer to reach a metal matrix and the time for the corrosive particles to pass through the coating layer to reach the metal matrix can be prolonged in the process of anticorrosive application of the coating; and the cathode reaction during corrosion can be transferred to an interface between the coating layer and air by virtue of the electrical conductivity of graphene, thereby slowing down the happening of electrochemical corrosion reaction. By adopting the method, the defects that the current waterborne anticorrosive coating layer is generally poor in barrier property and short in anticorrosion cycle are overcome, and the anticorrosion performance of the waterborne coating layer is greatly improved.

Description

technical field [0001] The invention relates to a preparation method of an organic composite coating material, in particular to a preparation method of a water-based epoxy composite anticorrosion coating. Background technique [0002] Metal corrosion has brought huge safety hazards and economic losses to the development of industry and society, and the use of anti-corrosion coatings is the most common and economical method to inhibit metal corrosion. The solvent content in traditional solvent-based coatings is about 40%, and the solvent content of some coatings such as nitro paint can be as high as 80% during construction. Therefore, the development of environmentally friendly coatings has become a research hotspot in the coatings field. Environmentally friendly coatings refer to coatings with low VOC and low toxicity. At present, the main varieties are water-based coatings, powder coatings, high-solid coatings and radiation-cured coatings. In terms of product form and usag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D163/02C09D5/08C09D7/12
Inventor 王娜付琬璐张静
Owner 蓬莱禄源漆业有限公司
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