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A kind of modified graphene oxide waterborne epoxy zinc-rich primer and preparation method thereof

A technology of epoxy zinc-rich primer and water-based epoxy emulsion, which is applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc. To meet market demand, affect the adhesion between intermediate paint layers and other issues, to achieve the effects of excellent hydrophilicity and dispersibility, excellent anti-corrosion performance, and low cost

Active Publication Date: 2020-12-08
重庆石墨烯研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the performance of solvent-based anti-corrosion coatings can basically meet the needs of the market, but solvent-based coatings are contrary to people's growing environmental protection demands, while the anti-corrosion performance of traditional water-based anti-corrosion coatings is difficult to meet market needs
On the other hand, graphene oxide tends to aggregate on the surface after it is applied to the waterborne epoxy zinc-rich primer, which not only affects the interlayer adhesion of the intermediate paint to the waterborne epoxy zinc-rich primer, but also cannot exert its own excellent performance, resulting in The anti-corrosion performance of this waterborne epoxy zinc-rich primer can not meet the market demand

Method used

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  • A kind of modified graphene oxide waterborne epoxy zinc-rich primer and preparation method thereof
  • A kind of modified graphene oxide waterborne epoxy zinc-rich primer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A modified graphene oxide water-based epoxy zinc-rich primer, the primer is mixed by A component and B component in a mass ratio of 3:1; wherein, A component is by mass parts, including the following components : 8 parts of amine curing agent (5 parts of bis(4-amino-3-methylcyclohexyl)methane and 3 parts of dicyclohexylamine), 5 parts of co-solvent (ethylene glycol ether), 2 parts of rheological aid agent (fumed silica), 75 parts of zinc powder (spherical, 800 mesh), 20 parts of modified graphene oxide aqueous solution, 2 parts of other additives (1 part of BYK 191 and 1 part of BYK381); B component is a water-based ring Oxygen emulsion (LPY 15011). Prepared by the following method:

[0024] (1) Add graphene oxide into deionized water, add sodium hydroxide after ultrasonic dispersion, add monochloroacetic acid after mixing, ultrasonicate in water bath for 3 hours, and then centrifuge to obtain precipitate, wash the precipitate with deionized water and store at 60°C Ob...

Embodiment 2

[0029] A modified graphene oxide water-based epoxy zinc-rich primer, the primer is mixed by A component and B component in a mass ratio of 2:1; wherein, A component is by mass parts, including the following components : 7 parts of amine curing agent (3 parts of 2-aminopyridine and 4 parts of 3-methylcyclohexylamine), 6.5 parts of cosolvent (ethylene glycol butyl ether), 1.5 parts of rheological modifier (organic bentonite), 73 Zinc powder (flaky, 1000 mesh), 20 parts of modified graphene oxide aqueous solution, 2 parts of other additives (1 part of BYK 190 and 1 part of BYK 348); component B is water-based epoxy emulsion (PZ 3961-1 ). Prepared by the following method:

[0030] (1) Add graphene oxide into deionized water, add sodium hydroxide after ultrasonic dispersion, mix well and then add monochloroacetic acid, ultrasonicate in water bath for 4 hours, then centrifuge to obtain precipitate, wash the precipitate with deionized water and store at 70°C Obtain modified graphen...

Embodiment 3

[0035]A modified graphene oxide water-based epoxy zinc-rich primer, the primer is mixed by A component and B component in a mass ratio of 4:1; wherein, A component is by mass parts, including the following components : 9 parts of amine curing agent (bis(4-aminocyclohexyl) methane), 5 parts of co-solvent (dipropylene glycol butyl ether), 1 part of rheological modifier (fumed silica), 68 parts of zinc powder (spherical , 500 mesh), 20 parts of modified graphene oxide aqueous solution, 2 parts of other additives (1 part of BYK 180 and 1 part of Deqian W-77); component B is water-based epoxy emulsion (Momentive 6520, USA). Prepared by the following method:

[0036] (1) Add graphene oxide into deionized water, add sodium hydroxide after ultrasonic dispersion, add monochloroacetic acid after mixing, ultrasonicate in water bath for 4.5h, and then centrifuge to obtain a precipitate, wash the precipitate with deionized water at 75 Modified graphene oxide was obtained after drying at °...

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Abstract

The invention relates to modified graphene oxide waterborne epoxy zinc-rich primer and a preparation method thereof and belongs to the technical field of anticorrosive paint. The primer is prepared bymixing a component A and a component B according to a mass ratio of (2-6):1; the component A is composed of the following components in parts by mass: 7 to 15 parts of an amine curing agent, 4 to 8 parts of a co-solvent, 1 to 2 parts of a rheological aid, 60 to 75 parts of zinc powder, 10 to 20 parts of a water solution of modified graphene oxide and 1 to 2 parts of other aids; and the componentB is waterborne epoxy emulsion. Gaphene oxide is modified and the modified graphene oxide has a lot of abundant ion bonds under the condition that the microstructure features of the graphene oxide areensured, so that the modified graphene oxide has excellent hydrophilic property and dispersity; the problem of gradient distribution and surface aggregation of the current graphene oxide in a coatingis solved; and the excellent performance of the graphene oxide can be expressed better. A preparation technology of the primer is simple and easy to operate, has low requirements on equipment and lowcost and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and in particular relates to a modified graphene oxide water-based epoxy zinc-rich primer and a preparation method thereof. Background technique [0002] Graphene oxide has a two-dimensional layered structure, extremely high specific surface area, fast electrical conductivity, and excellent mechanical properties, so it can be used as an additive in anti-corrosion coatings to improve the anti-corrosion performance of coatings. At present, the performance of solvent-based anti-corrosion coatings can basically meet the needs of the market, but solvent-based coatings are contrary to people's growing environmental protection demands, while the anti-corrosion performance of traditional water-based anti-corrosion coatings is difficult to meet market needs. On the other hand, graphene oxide tends to aggregate on the surface after it is applied to the waterborne epoxy zinc-rich primer, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/10C09D7/62
CPCC08K2003/0893C09D5/106C09D163/00C09D7/62C08K9/04C08K3/042C08K3/08
Inventor 池铫吴声坤李朝龙
Owner 重庆石墨烯研究院有限公司