Waterborne epoxy graphene zinc anticorrosive coating and preparation method and application thereof

A technology of water-based epoxy and anti-corrosion coatings, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problem of reduced impact resistance and wear resistance, zinc powder sedimentation in zinc-rich paints, and changes in coating adhesion Poor and other problems, to achieve the effect of reducing content, improving adhesion, and improving shielding effect

Inactive Publication Date: 2019-05-17
宁波中科银亿新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the content of zinc powder helps to improve the salt water resistance and salt spray corrosion resistance of zinc-rich coatings, but excessive zinc powder content will cause poor adhesion, impact resistance and wear resistance of the coating, and increase the cost. question
In addition, if the zinc powder content is too high, the zinc powder in the zinc-rich paint will settle seriously, and more zinc oxide fumes will be generated during cutting and other processes, which will endanger human health.

Method used

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  • Waterborne epoxy graphene zinc anticorrosive coating and preparation method and application thereof
  • Waterborne epoxy graphene zinc anticorrosive coating and preparation method and application thereof
  • Waterborne epoxy graphene zinc anticorrosive coating and preparation method and application thereof

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preparation example Construction

[0038] The embodiment of the present invention also provides the preparation method of described waterborne epoxy graphene zinc anticorrosion coating, comprising:

[0039] mixing a water-based epoxy resin curing agent, a dispersant, an anti-sedimentation agent and a film-forming aid to form a mixture, and then mixing a graphene dispersion slurry, an extender pigment and zinc powder with the mixture to obtain component one;

[0040] Mix water-based epoxy emulsion, anti-flash rust agent, water and defoamer to obtain component 2;

[0041] The obtained component one and component two are uniformly mixed to form the waterborne epoxy graphene zinc anticorrosion coating.

[0042] In some embodiments, the preparation of component one specifically includes: mixing the water-based epoxy resin curing agent, dispersant, anti-sedimentation agent and film-forming aid, and dispersing at a speed of 400-600r / min for 5-10min to form a mixture, and then Add the graphene dispersion slurry into t...

Embodiment 1

[0052] Put 5 parts of water-based epoxy curing agent, 0.5 parts of dispersant, 0.5 parts of fumed silica, 0.25 parts of polyamide wax, 0.25 parts of bentonite, and 1 part of propylene glycol methyl ether into the metal tank in sequence, and stir at 400-600r / min Disperse for about 10 minutes to obtain a semi-finished coating;

[0053] 0.2 parts of graphene, 2.3 parts of butyl glycol acetate, and 2 parts of propylene glycol methyl ether were stirred and mixed evenly, and then ultrasonically dispersed for 2 hours to obtain a graphene dispersion slurry;

[0054] Stir and disperse 4.5 parts of the above-mentioned graphene dispersion slurry at 800-1000r / min for about 5 minutes, add to the aforementioned semi-finished coating, and then add 2.5 parts of talc powder, 2.5 parts of mica powder, 5 parts of precipitated barium sulfate, and 40 parts of ordinary zinc powder and 2 parts of ultra-fine zinc powder, stirring and dispersing at a speed of 1000-2000r / min for about 20 minutes, the f...

Embodiment 2

[0059] Put 10 parts of water-based epoxy curing agent, 1 part of dispersant, 1.5 parts of fumed silica, 0.75 parts of polyamide wax, 0.75 parts of bentonite, and 3 parts of propylene glycol methyl ether into a metal tank in sequence, and stir at 400-600r / min Disperse for about 10 minutes to obtain a semi-finished coating;

[0060] 0.7 parts of graphene, 2.3 parts of butyl glycol acetate, and 2 parts of propylene glycol methyl ether were stirred and mixed evenly, and then ultrasonically dispersed for 2 hours to obtain a graphene dispersion slurry;

[0061] Stir and disperse 5 parts of the above-mentioned graphene dispersion slurry at 800-1000r / min for about 10 minutes, add to the aforementioned semi-finished coating, and then add 2.5 parts of talc powder, 2.5 parts of mica powder, 10 parts of precipitated barium sulfate, and 55 parts of ordinary zinc powder and 10 parts of ultrafine zinc powder, stirring and dispersing for about 20 minutes at a rotating speed of 1000-2000r / min,...

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Abstract

The invention discloses a waterborne epoxy graphene zinc anticorrosive coating. The waterborne epoxy graphene zinc anticorrosive coating comprises a first component and a second component, wherein thefirst component is prepared from the following components in parts by weight: 5-10 parts of a waterborne epoxy resin curing agent, 0.5-1 part of a dispersant, 1-3 parts of an anti-settling agent, 1-3parts of a coalescing agent, 10-15 parts of body pigment, 42-65 parts of zinc powder and 4.5-5 parts of graphene dispersion slurry. The second component is prepared from the following components in parts by weight: 30-40 parts of aqueous epoxy emulsion, 1-2 parts of an anti-flash rust agent, 5-15 parts of water and 0.2-0.8 part of a defoaming agent. The waterborne epoxy graphene zinc anticorrosive coating has high utilization rate of zinc powder and is easy to prepare, and the formed coating has excellent comprehensive properties, such as good compactness, excellent cathodic protection performance and shielding performance, anticorrosive performance is remarkably improved, and the waterborne epoxy graphene zinc anticorrosive coating has wide application prospects in the field of marine equipment anticorrosion.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a water-based epoxy graphene zinc anti-corrosion coating, its preparation method and application. Background technique [0002] The marine environment is a harsh corrosive environment. Various steel structures (such as containers, ocean platforms, port terminals, etc.) serving in the marine environment will corrode in a short period of time and cause damage if effective protection measures are not adopted. to serious consequences. my country's marine engineering equipment anti-corrosion coatings are basically solvent-based coatings. During the preparation and construction process, a large amount of volatile organic solvents (VOC) in the coatings not only seriously pollute the environment and endanger human health, but also cause great damage to resources. Waste runs counter to the needs of low-carbon economic development. Therefore, the research on low-VOC water-based anti-corrosion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/61
Inventor 伍权蒲吉斌刘栓王立平
Owner 宁波中科银亿新材料有限公司
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