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A kind of waterborne epoxy coating and its preparation method and application

A water-based epoxy and coating technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of poor anti-corrosion ability, inability to actively protect, poor corrosion resistance of water-based epoxy coatings, etc., to achieve cost Low, natural and non-toxic ingredients, environmentally friendly effect

Active Publication Date: 2022-04-19
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of poor corrosion resistance and inability to actively protect current water-based epoxy coatings, the primary purpose of the present invention is to provide a water-based epoxy coating, the purpose of which is to modify h-BN nanosheets and ZIF-7 Prepare water-based epoxy coatings with fillers, thereby solving the technical problem of poor corrosion resistance of existing water-based epoxy coatings

Method used

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  • A kind of waterborne epoxy coating and its preparation method and application
  • A kind of waterborne epoxy coating and its preparation method and application
  • A kind of waterborne epoxy coating and its preparation method and application

Examples

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Effect test

Embodiment 1

[0036] A corrosion-resistant waterborne epoxy coating, the preparation steps of which are as follows:

[0037] (1) Add 1 g of boron nitride to 180 ml of DMF, ultrasonicate the mixture at 50° C. for 4 h, centrifuge, filter, wash, and dry the centrifuged suspension to obtain boron nitride nanosheets (BNNS);

[0038] (2) Add 2g of zinc gluconate, 0.6g of 5-aminotetrazole, 1.5g of benzimidazole, 0.1g of BNNS prepared in step (1) into 180ml of DMF solution, stir at 35°C for 72h, centrifuge and filter , washing, and drying to obtain composite nanofiller 5-ATZ@ZIF-7@BNNS;

[0039] (3) Add the nanocomposite nanofiller prepared in step (2) into the water-based epoxy resin, and prepare an epoxy resin coating with a mass fraction of 0.05%.

Embodiment 2

[0041] A corrosion-resistant epoxy coating, the preparation steps of which are as follows:

[0042] (1) Add 1 g of boron nitride to 180 ml of DMF, ultrasonicate the mixture at 50° C. for 4 h, centrifuge, filter, wash, and dry the centrifuged suspension to obtain boron nitride nanosheets (BNNS);

[0043] (2) Add 2g of zinc gluconate, 0.6g of 5-aminotetrazole, 1.5g of benzimidazole, 0.1g of BNNS prepared in step (1) into 180ml of DMF solution, stir at 35°C for 72h, centrifuge and filter , washing, and drying to obtain composite nanofiller 5-ATZ@ZIF-7@BNNS;

[0044] (3) Add the nanocomposite filler prepared in step (2) into the water-based epoxy resin, and prepare an epoxy resin coating with a mass fraction of 0.1%.

Embodiment 3

[0046] A corrosion-resistant epoxy coating, the preparation steps of which are as follows:

[0047](1) Add 1 g of boron nitride to 180 ml of DMF, ultrasonicate the mixture at 50° C. for 4 h, centrifuge, filter, wash, and dry the centrifuged suspension to obtain boron nitride nanosheets (BNNS);

[0048] (2) Add 2g of zinc gluconate, 0.6g of 5-aminotetrazole, 1.5g of benzimidazole, 0.1g of BNNS prepared in step (1) into 180ml of DMF solution, stir at 35°C for 72h, centrifuge and filter , washing, and drying to obtain composite nanofiller 5-ATZ@ZIF-7@BNNS;

[0049] (3) Add the nanocomposite nanofiller prepared in step (2) into the water-based epoxy resin, and prepare an epoxy resin coating with a mass fraction of 0.2%.

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Abstract

The invention belongs to the technical field of anti-corrosion, and relates to a water-based epoxy coating and its preparation method and application. In the epoxy coating, according to the weight fraction, 99.8% is epoxy resin, 0.2% is nano filler, wherein in nano filler, 20-40% boron nitride, 55-75% ZIF-7 filler, 5 % corrosion inhibitor. On the basis of traditional water-based epoxy resin, adding two-dimensional nano-fillers and pH-responsive ZIF-7 fillers has obvious corrosion inhibition effect, simple preparation method, safety, non-toxicity and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion, and relates to a water-based epoxy coating and its preparation method and application. Background technique [0002] Carbon steel has low price, high output and excellent strength, and has been widely used in industrial, military and civil fields. However, when carbon steel is used in the open air, it is affected by corrosive particles such as oxygen, water vapor, and chloride ions in the atmospheric environment, and is easily subjected to atmospheric corrosion, which affects its service life and life, causing huge economic losses and potential safety hazards. According to statistics, the annual loss of carbon steel caused by atmospheric corrosion in my country accounts for more than half of all corrosion types. [0003] Atmospheric corrosion can be controlled by many methods. At present, organic coatings are the most widely used. With the improvement of environmental protection requireme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61
CPCC09D163/00C09D5/08C09D7/61C09D7/70C08K2201/011C08L87/00C08K7/00C08K5/3472
Inventor 廖伯凯汪鸿万闪陈汇凯郭兴蓬
Owner GUANGZHOU UNIVERSITY
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