Low-VOC (volatile organic compound) water-based bi-component epoxy zinc-rich coating and preparation method thereof

An epoxy zinc-rich coating, water-based epoxy technology, applied in the field of coatings, can solve the problems affecting processing and use performance, difficult to meet construction requirements, water resistance not up to standard, etc., to reduce the amount of VOC, reduce viscosity, and not easy to precipitate.

Active Publication Date: 2022-03-01
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the VOC content of commercially available water-based epoxy zinc-rich primers is 250-350g / L, which is relatively high, and the water-based epoxy zinc-rich primers have slow drying, early water resistance is not up to standard, and precipitation is difficult. Meet the construction requirements, the paint film is brittle, affecting processing and performance

Method used

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  • Low-VOC (volatile organic compound) water-based bi-component epoxy zinc-rich coating and preparation method thereof
  • Low-VOC (volatile organic compound) water-based bi-component epoxy zinc-rich coating and preparation method thereof
  • Low-VOC (volatile organic compound) water-based bi-component epoxy zinc-rich coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A preparation method of low-VOC waterborne two-component epoxy zinc-rich paint, comprising the following steps:

[0061] S00, material preparation

[0062] Component A: Weigh low-viscosity modified water-based epoxy resin 11, propylene glycol methyl ether 0.5, 800 mesh zinc powder 82, dispersant VXW6208 1.2, filler barite powder NB45 5, anti-settling agent CLAYTONE APA 0.3.

[0063] Component B: weigh 37.5 parts by weight of water-based epoxy curing agent, 62 parts of deionized water, and 0.5 part of anti-flash rust agent;

[0064] Low-viscosity modified water-based epoxy resin: Weigh 58 dimer acid modified epoxy resin, 128 epoxy resin 10, E-10P 5, polyether amine M600 12, propylene glycol methyl ether 15 in parts by weight.

[0065] Preparation of S01, A component:

[0066] S11. Stir the low-viscosity modified water-based epoxy resin, propylene glycol methyl ether, and dispersant at 400r / min for 20min, and mix evenly;

[0067] Wherein the low-viscosity modified wate...

Embodiment 2

[0079] A preparation method of low-VOC waterborne two-component epoxy zinc-rich paint, comprising the following steps:

[0080] S00, material preparation

[0081] Component A: Weigh low-viscosity modified water-based epoxy resin 11, propylene glycol methyl ether 1, 800-mesh zinc powder 81.5, dispersant VXW6208 1.2, filler 1250-mesh silicon micropowder 5, anti-settling agent CLAYTONE APA0.3;

[0082] Component B: weigh 37.5 parts by weight of water-based epoxy curing agent, 62 parts of deionized water, and 0.5 part of anti-flash rust agent;

[0083] Low-viscosity modified water-based epoxy resin: Weigh dimer acid modified epoxy 53, 128 epoxy resin 15, E-10P 5, polyetheramine M600 12, propylene glycol methyl ether 15 by weight.

[0084] Preparation of S01, A component:

[0085] S11. Stir the low-viscosity modified water-based epoxy resin, co-solvent, and dispersant at 400r / min for 20min, and mix well;

[0086] Wherein the low-viscosity modified waterborne epoxy resin is obtai...

Embodiment 3

[0102] A preparation method of low-VOC waterborne two-component epoxy zinc-rich paint, comprising the following steps:

[0103] S00, material preparation

[0104] Component A: Weigh 12.5 parts by weight of low-viscosity modified water-based epoxy resin, 65 domestically produced Shenlong 500-mesh zinc powder, 20 filler barite powder, 1 propylene glycol ether as a cosolvent, 1 dispersant, and anti-sedimentation agent (Haiming Bentonite SD-2) 0.5;

[0105] Component B: weigh 37.5 parts by weight of water-based epoxy curing agent, 62 parts of deionized water, and 0.5 part of anti-flash rust agent;

[0106] Low-viscosity modified water-based epoxy resin: Weigh 55 modified epoxy resin, 128 epoxy resin 14, epoxy reactive diluent DER736 4, polyether amine M100012, propylene glycol methyl ether 15 by weight.

[0107] Preparation of S01, A component:

[0108] S11. Stir the low-viscosity modified water-based epoxy resin, co-solvent, and dispersant at 400r / min for 20min, and mix well; ...

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Abstract

The invention relates to a low-VOC (volatile organic compound) water-based bi-component epoxy zinc-rich coating and a preparation method thereof. The low-VOC water-based bi-component epoxy zinc-rich coating comprises a component A and a component B in a mass ratio of (10: 1)-(20: 1), the component A comprises the following components in parts by weight: 10.5-20 parts of low-viscosity modified water-borne epoxy resin, 65-85 parts of zinc powder, 0-20 parts of filler, 0.5-2 parts of a cosolvent, 0.5-1.5 parts of a dispersing agent and 0.3-1 part of an anti-settling agent; and the component B comprises the following components in parts by weight: 35-50 parts of a waterborne epoxy curing agent, 50-65 parts of deionized water and 0.5-1 part of a flash rust inhibitor. Compared with the prior art, the primer provided by the invention has the advantages of low VOC content, fast paint film dryness, good toughness, excellent early water resistance and excellent corrosion resistance, and in addition, the preparation method of the waterborne epoxy zinc-rich primer provided by the invention has the advantages of simple preparation process, reduction of the preparation cost and improvement of the corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a low-VOC water-based two-component epoxy zinc-rich coating and a preparation method thereof. Background technique [0002] Starting from April 1, 2017, the coating production lines of national standard dry cargo container manufacturers have all changed from solvent-based coating systems to water-based coating systems. With the comprehensive water-based coating of containers, the water-based industrial paint market has been greatly developed, driving construction machinery, rail transit and other industries to strive towards environmental protection and green. [0003] The operating environment of shipping containers is relatively complex. It not only needs to deal with the harsh climate at sea, but also needs to face the corrosive environment of high humidity and high salt for several months or up to a year. Therefore, the container itself is required to have high ...

Claims

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Application Information

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IPC IPC(8): C09D5/10C09D163/00C09D7/20C09D7/45C08G59/14
CPCC09D5/103C09D163/00C09D7/20C09D7/45C08G59/1477C08G59/1438C08K2003/2293C08G2150/90C08L63/00C08K3/08C08K3/346
Inventor 掌婷婷丁奋朱结东杨挺秀
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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