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Graphene-modified epoxy zinc-rich primer and preparation method thereof

A technology of epoxy zinc-rich primer and graphene modification, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., to achieve the effect of dense paint film and enhanced anti-corrosion effect

Active Publication Date: 2016-06-29
JIANGSU BANGJIE ANTI CORROSION THERMAL INSULATIONTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Graphene is easy to aggregate when used in coatings, and it is not easy to disperse uniformly in the system. In the above-mentioned prior art, ultrasonic agitation or pre-preg treatment all use physical methods and cannot solve the problem of uneven dispersion of graphene.

Method used

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  • Graphene-modified epoxy zinc-rich primer and preparation method thereof
  • Graphene-modified epoxy zinc-rich primer and preparation method thereof
  • Graphene-modified epoxy zinc-rich primer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of modified epoxy resin Phthalic acid modified epoxy resin:

[0025] Put 100Kg of epoxy resin into the reactor, stir and heat to 80°C, add 5Kg of phthalic anhydride, continue to stir, keep warm at 80°C for 15 minutes, and cool down to obtain phthalic acid epoxy resin.

[0026] Two, prepare graphene epoxy resin slurry:

[0027] The phthalic acid epoxy resin 19Kg prepared by step (1) is dropped in the mixing tank, add graphene 0.5Kg and stir at a high speed for half an hour, become uniform paste, promptly make graphene epoxy resin slurry;

[0028] 3. Preparation of graphene-modified epoxy zinc-rich primer:

[0029] Slowly stir again, drop into solvent toluene 6Kg successively, butanol 4Kg, anti-sedimentation agent organic bentonite 0.5Kg, zinc powder 85Kg, disperse at high speed for half an hour, adjust viscosity, filter and obtain epoxy zinc-rich primer.

[0030] When the paint is used, component A is epoxy zinc-rich primer, component B is 30% phenalkami...

Embodiment 2

[0032] 1. Preparation of modified epoxy resin Phthalic acid modified epoxy resin:

[0033] Put 100Kg of epoxy resin into the reactor, stir and heat to 80°C, add 8Kg of phthalic anhydride, continue to stir, keep warm at 80°C for 15 minutes and cool down to obtain phthalic acid epoxy resin.

[0034] Two, prepare graphene epoxy resin slurry:

[0035] The phthalic acid epoxy resin 25Kg prepared by step (1) is dropped into the mixing tank, add graphene 0.8Kg and stir at a high speed for half an hour, and become uniform paste, that is, graphene epoxy resin slurry is obtained;

[0036] 3. Preparation of graphene-modified epoxy zinc-rich primer:

[0037] Stir slowly again, drop into solvent toluene 8Kg successively, butanol 5Kg, anti-sedimentation agent polyamide wax 0.8Kg, zinc powder 88Kg, disperse at high speed for half an hour, adjust viscosity, filter and obtain epoxy zinc-rich primer.

[0038] When the paint is used, component A is epoxy zinc-rich primer, component B is 30% ph...

Embodiment 3

[0040] 1. Preparation of modified epoxy resin Phthalic acid modified epoxy resin:

[0041] Put 100Kg of epoxy resin into the reactor, stir and heat to 80°C, add 10Kg of phthalic anhydride, continue to stir, keep warm at 85°C for 15 minutes and cool down to obtain phthalic acid epoxy resin.

[0042] Two, prepare graphene epoxy resin slurry:

[0043] The phthalic acid epoxy resin 16Kg prepared by step (1) is dropped in the mixing tank, add graphene 1.1Kg and stir at a high speed for half an hour, become uniform paste, promptly make graphene epoxy resin slurry;

[0044] 3. Preparation of graphene-modified epoxy zinc-rich primer:

[0045] Stir slowly again, drop into solvent toluene 7Kg successively, butanol 3Kg, anti-sedimentation agent polyamide wax 0.6Kg, zinc powder 75Kg, disperse at high speed for half an hour, adjust viscosity, filter and obtain epoxy zinc-rich primer.

[0046] When the paint is used, component A is epoxy zinc-rich primer, component B is 30% phenalkamine (...

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Abstract

The invention relates to a graphene-modified epoxy zinc-rich primer and a preparation method thereof, wherein the parts by mass of each component of the primer are: 15-30 parts of modified epoxy resin, 0.3-5 parts of graphene, and butanol 2-8 parts, 4-10 parts of toluene, 0.3-3 parts of anti-settling agent, 70-90 parts of zinc powder, and the modified epoxy resin is phthalic acid modified epoxy resin. The preparation method comprises (1) preparing modified epoxy resin phthalic acid modified epoxy resin; (2) preparing graphene epoxy resin slurry; (3) preparing graphene modified epoxy zinc-rich primer. The present invention reacts the hydroxyl group of the epoxy resin with phthalic anhydride by modifying the epoxy resin, introduces the highly polar carboxyl group, and the epoxy resin itself becomes a dispersant with strong dispersion ability, which can efficiently disperse and chelate graphite Graphene and resin chelate and evenly disperse in the coating system to achieve the best anti-corrosion effect. In addition, the sheet-like structure of graphene makes the paint film denser, and the path for corrosive gas to enter is longer to further enhance the anti-corrosion effect .

Description

technical field [0001] The invention relates to a coating composition and a preparation method thereof, in particular to an epoxy zinc-rich primer and a preparation method thereof. Background technique [0002] Epoxy zinc-rich primer is a special coating composed of epoxy resin and zinc powder as the main raw materials, fillers, additives, solvents, etc. It has excellent anti-corrosion performance, strong adhesion, high zinc powder content in the paint film, and cathodic protection. Excellent water resistance, suitable for storage tanks, containers, steel structures, steel pipes, offshore platforms, ships, seaport facilities, and primers in harsh anti-corrosion environments. [0003] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is a planar film composed of carbon atoms with sp2 hybrid orbitals forming a hexagonal honeycomb lattice, and a two-dimensional material with a thickness of only one carbon atom. Graphene is the thinnes...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/12C09D5/10C08G59/14
Inventor 宋胜利白攀峰韩建国
Owner JIANGSU BANGJIE ANTI CORROSION THERMAL INSULATIONTECH
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