Novel graphene slurry modified epoxy-zinc powder anticorrosion coating and preparation method thereof

A technology of anti-corrosion coatings and graphene, which is applied in anti-corrosion coatings, epoxy resin coatings, conductive coatings, etc., can solve the problems that metal zinc powders are not connected to each other, affect the use efficiency of zinc powders, and poor connection strength of zinc-rich primers. Achieve excellent anti-corrosion performance, improve agglomeration phenomenon, and good dispersion

Inactive Publication Date: 2019-01-29
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a high content of metal zinc powder (70% to 90%) can easily lead to poor connection strength of the zinc-rich primer, and the adhesion of most epoxy zinc-rich coatings is not greater than 5MPa; Zinc salts make the metal zinc powders not connected to each other, which also affects the use efficiency of zinc powders to a certain extent

Method used

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  • Novel graphene slurry modified epoxy-zinc powder anticorrosion coating and preparation method thereof
  • Novel graphene slurry modified epoxy-zinc powder anticorrosion coating and preparation method thereof
  • Novel graphene slurry modified epoxy-zinc powder anticorrosion coating and preparation method thereof

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specific Embodiment approach

[0025] A new type of graphene slurry modified epoxy zinc powder anti-corrosion coating, in terms of raw materials, by preparing graphene-epoxy resin slurry with good dispersion and excellent conductivity, it can effectively improve the agglomeration caused by the direct addition of graphene phenomenon, compared with functional modified graphene, graphene-epoxy resin slurry surface has no functional modification groups, which can ensure its excellent electrical conductivity; the anti-corrosion coating includes component A and component B, so The mass ratio of component A and component B is 7:1 to 9:1. In parts by weight, component A includes 20 to 30 parts of epoxy resin, 3 to 6 parts of graphene-epoxy resin slurry, 40-50 parts of metal zinc powder, 10-15 parts of functional filler, 0.5-1 part of dispersant, 0.5-1 part of anti-settling agent, 0.5-1 part of defoamer, 5-10 parts of mixed solvent, component B includes 40 ~60 parts of polyamide curing agent and 40~60 parts of mixed...

Embodiment 1

[0042] A novel graphene slurry modified epoxy zinc powder anti-corrosion coating, comprising A component and B component, the mass ratio of said A component and B component is 7:1, by weight, A component Including 20 parts of epoxy resin, 3 parts of graphene-epoxy resin paste, 40 parts of metal zinc powder, 10 parts of functional filler, 0.5 part of dispersant, 0.5 part of anti-settling agent, 0.5 part of defoamer, 5 parts of mixed solvent , the second component includes 40 parts of polyamide curing agent and 40 parts of mixed solvent; Wherein, in the graphene-epoxy resin slurry, the weight of graphene is 3 parts of the total weight of the graphene-epoxy resin slurry %; the functional filler includes 5 parts of mica powder and 5 parts of talcum powder; the model of the dispersant is 5100; the anti-sedimentation agent is fumed silica; the model of the defoamer is

[0043] 6800; the mixed solvent is prepared by mixing xylene: n-butanol in a mass ratio of 3:2.

[0044] A kind of...

Embodiment 2

[0052] A novel graphene slurry modified epoxy zinc powder anti-corrosion coating, comprising A component and B component, the mass ratio of said A component and B component is 8:1, by weight, A component Including 25 parts of epoxy resin, 5 parts of graphene-epoxy resin slurry, 45 parts of metal zinc powder, 12 parts of functional filler, 0.8 part of dispersant, 0.8 part of anti-settling agent, 0.8 part of defoamer, 8 parts of mixed solvent , the second component includes 50 parts of polyamide curing agent and 50 parts of mixed solvent; Wherein, in the described graphene-epoxy resin slurry, the weight of graphene is 4 parts of the total weight of described graphene-epoxy resin slurry %; the functional filler includes 8 parts of mica powder and 4 parts of barite powder; the model of the dispersant is BYK-110; the anti-settling agent is polyamide wax slurry; the model of the defoamer is 6800; The mixed solvent is prepared by mixing xylene: n-butanol at a mass ratio of 5:2.

[0...

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Abstract

A novel graphene slurry modified epoxy-zinc powder anticorrosion coating and a preparation method thereof. The anticorrosion coating includes epoxy resin, graphene-epoxy resin slurry, metal zinc powder, functional filler, and other functional additives. By preparing the graphene-epoxy resin slurry having high dispersibility and electric-conductivity, a phenomenon of aggregation due to direct addition of graphene is effectively solved and usage amount of zinc powder is meanwhile reduced. By compounding the slurry with the epoxy resin and functional filler, dispersibility of graphene in the coating is improved. According to the preparation method, by combination of sand milling and high-speed dispersion, stable dispersion of the graphene in the coating is achieved, and fineness of the coating is guaranteed, so that the coating, compared with a conventional epoxy zinc-rich coating, the coating has good adhesion force, excellent anti-salt fog performance and outstanding anticorrosion performance. Compared with the conventional epoxy zinc-rich coating, the anticorrosion coating is greatly reduced in content of zinc powder, can reach 4000 h in anti-salt fog performance, is higher than 8MPa in adhesion force, and has extensive application prospect.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a novel graphene slurry modified epoxy zinc powder anticorrosion coating and a preparation method thereof. Background technique [0002] As a new generation of outstanding carbon material, graphene has the following advantages when applied to epoxy zinc powder anti-corrosion coatings: graphene has excellent electrical conductivity, and can form electron transmission channels between metal zinc powders, without the need for a large amount of zinc powder to be tightly packed, reducing zinc At the same time, it can bypass the zinc salt to connect unreacted zinc powder in the later stage, improve the utilization rate of zinc powder and save resources; the addition of graphene replaces part of the zinc powder, which improves the connection strength of the coating; the surface of graphene has a hydrophobic effect , the contact angle with water is very large, and the water resistance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/24C09D5/10C09D7/61
CPCC08K2003/0893C08K2201/014C09D5/106C09D5/24C09D7/61C09D7/70C09D163/00C08K13/04C08K3/042C08K3/08C08K7/00C08K3/40C08K3/34C08K13/02C08K3/30
Inventor 梁宇亓海霞陈凯锋张黎黎
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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