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Water-based graphene zinc powder anticorrosive paint and preparation method thereof

A water-based graphene and anti-corrosion coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of water resistance, salt spray resistance time gap, easy to form defects, corrosion resistance performance gap and other problems, and achieve low Outstanding effects of VOC emission, delayed penetration, and corrosion resistance

Inactive Publication Date: 2022-04-05
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, the organic solvent content in traditional solvent-based zinc powder coatings is high, which is very harmful to the health of operators when used; therefore, water-based coatings are increasingly rising, but the current commercially available water-based anti-corrosion coatings are different from traditional solvent-based Compared with coatings, there is a certain gap in related properties such as water resistance and salt spray resistance time, which limits the development of water-based coatings.
Specifically: water-based anti-corrosion coatings use water instead of traditional solvents as the dispersion medium. Since the surface tension of water is much larger than that of organic solvents, dirt will cause shrinkage cavities in the coating film; Influenced by temperature and humidity, the drying and hardening process of the coating film is a chemical reaction of a heterogeneous system, the degree of reaction is difficult to control, and defects are easily formed; moisture and zinc powder will react to produce bubbles, and if the dispersion is not good, the coating film will produce defects Then affect the anti-corrosion performance; many additives will be added to the water-based coating formula, and these additives will affect the anti-corrosion performance of the coating film
Therefore, the corrosion resistance of water-based coatings will be different from that of traditional solvent-based coatings.

Method used

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  • Water-based graphene zinc powder anticorrosive paint and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] According to the ratio, weigh 76.7g of resin emulsion, 0.3g of defoamer, 0.3g of wetting agent, 0.2g of anti-flash rust agent, and stir for 10 minutes; weigh 0.5g of thickener, add it to 12g of water, and stir to form a uniform paste After the mixture was formed, it was added to the above slurry and continued to stir for 20 minutes; 10 g of graphene dispersion liquid was weighed, added to the above slurry and stirred for 20 minutes, filtered to obtain component A.

[0070] Above-mentioned, resin emulsion is the epoxy resin emulsion of E20 system, and solid content is 52%, and epoxy equivalent is 500 (commercially available product, from Guangdong Tongde); Defoamer is organosilicon defoamer (commercially available product, from AFCONA), the wetting agent is polyether modified siloxane (commercially available product, from AFCONA), the anti-flash rust agent is effectively divided into 5% sodium nitrite aqueous solution, the thickener is 49% to 53% non-volatile % of associ...

Embodiment 2

[0076] According to the ratio, weigh 76.7g of resin emulsion, 0.3g of defoamer, 0.3g of wetting agent, 0.2g of anti-flash rust agent, and stir for 10 minutes; weigh 0.5g of thickener, add it to 2g of water, and stir to form a uniform paste After the mixture was formed, it was added to the above slurry and continued to stir for 20 minutes; 20 g of graphene dispersion liquid was weighed, added to the above slurry and stirred for 20 minutes, filtered to obtain component A.

[0077] Above-mentioned, resin emulsion is the epoxy resin emulsion of E20 system, and solid content is 52%, and epoxy equivalent is 500 (commercially available product, from Guangdong Tongde); Defoamer is organosilicon defoamer (commercially available product, from AFCONA), the wetting agent is polyether modified siloxane (commercially available product, from AFCONA), the anti-flash rust agent is effectively divided into 5% sodium nitrite aqueous solution, the thickener is 49% to 53% non-volatile % of associa...

Embodiment 3

[0082] According to the ratio, weigh 76.7g of resin emulsion, 0.3g of defoamer, 0.3g of wetting agent, 0.2g of anti-flash rust agent, and stir for 10 minutes; weigh 0.5g of thickener, add it to 2g of water, and stir to form a uniform paste After the mixture was formed, it was added to the above slurry and continued to stir for 20 minutes; 20 g of graphene dispersion liquid was weighed, added to the above slurry and stirred for 20 minutes, filtered to obtain component A.

[0083] Above-mentioned, resin emulsion is the epoxy resin emulsion of E20 system, and solid content is 52%, and epoxy equivalent is 500 (commercially available product, from Guangdong Tongde); Defoamer is organosilicon defoamer (commercially available product, from AFCONA), the wetting agent is polyether modified siloxane (commercially available product, from AFCONA), the anti-flash rust agent is effectively divided into 5% sodium nitrite aqueous solution, the thickener is 49% to 53% non-volatile % of associa...

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Abstract

The invention belongs to the field of chemical engineering, and particularly relates to a water-based graphene zinc powder anticorrosive coating, a preparation method thereof and application of the water-based graphene zinc powder anticorrosive coating in the field of corrosion resistance. The component A and the component B are mixed according to the mass ratio of (0.8-1.5): 3 when being compounded; wherein the component A comprises an epoxy resin emulsion, graphene water and an auxiliary agent, and the component B comprises a curing agent, zinc powder, a pigment filler, an auxiliary agent and a solvent. Compared with a traditional water-based graphene zinc powder coating in the market, the salt fog resistance time of the coating is greatly prolonged, specifically, the salt fog resistance time can reach 2500h or above, and corrosion at scratches spreads within 1.5 mm.

Description

technical field [0001] The invention belongs to the field of chemical industry, and specifically relates to a water-based graphene zinc powder anticorrosion coating, a preparation method thereof and an application in the field of corrosion resistance. Background technique [0002] In traditional high-durability epoxy zinc-rich anti-corrosion coatings, the content of metal zinc powder can often reach more than 80%. However, the working conditions of high-content zinc powder are extremely harsh during construction, and it is easy to produce a large amount of zinc oxide, causing "zinc fever" for construction workers, and it also has the disadvantage of poor environmental friendliness. Therefore, it is of great practical significance and urgent demand to reduce the content of zinc powder in epoxy zinc-rich coatings and at the same time ensure its long-term corrosion protection performance. [0003] On the other hand, the organic solvent content in traditional solvent-based zinc...

Claims

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Application Information

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IPC IPC(8): C09D5/10C09D163/00C09D7/61C09D7/63C09D7/45
Inventor 康鑫唐博王佳妮史美慧韩悦吴井龙
Owner SHENYANG RES INST OF CHEM IND
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