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Waterborne epoxy zinc-rich coating and preparation method thereof

A water-based epoxy zinc-rich coating technology, applied in the coating field, can solve the problems of poor stability of water-based epoxy zinc-rich coatings, achieve excellent construction stability, excellent anti-corrosion performance, and improve storage stability

Active Publication Date: 2020-08-14
GUANGZHOU JOINTAS CHEM
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Problems solved by technology

[0005] In order to overcome the problem of poor stability of the water-based epoxy zinc-rich paint in the prior art, one of the purposes of the present invention is to provide a water-based epoxy zinc-rich paint with high stability, and the second purpose of the present invention is to provide this water-based epoxy zinc-rich paint. Preparation method of oxygen-rich zinc coating

Method used

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  • Waterborne epoxy zinc-rich coating and preparation method thereof

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Embodiment Construction

[0055] The content of the present invention will be described in further detail below through specific examples. The raw materials, reagents or devices used in the examples and comparative examples can be obtained from conventional commercial channels or obtained by prior art methods unless otherwise specified. Unless otherwise specified, experiments or testing methods are conventional methods in the art.

[0056] The raw materials used in the following examples and comparative examples are described as follows:

[0057] Water-based amine curing agent: Huntsman's 3951;

[0058] Solvent: Propylene Glycol Methyl Ether from Dow Chemical;

[0059] Molecular sieve: 3A type molecular sieve, common commercial use;

[0060] Wetting and dispersing agent: allnex 6208;

[0061] Silane coupling agent: Dow Corning's aminosilane coupling agent Z6610;

[0062] Anti-sedimentation agent A: Hydrophobic bentonite, common commercial use;

[0063] Anti-settling agent B: Hydrophobic fumed sil...

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Abstract

The invention discloses a waterborne epoxy zinc-rich coating and a preparation method thereof. The waterborne epoxy zinc-rich coating comprises a component A and a component B, wherein the component Acomprises the following components in parts by mass: 1.5-8 parts of a water-based amine curing agent, 1-10 parts of a solvent, 0.3-1.3 parts of a molecular sieve, 0.3-1.5 parts of a coupling agent, 40-70 parts of zinc powder, 0.8-3 parts of a multifunctional improver, 0.2-3 parts of a lipophilic anti-settling agent and 0.1-1 part of a wetting dispersant; the component B is prepared from the following components in parts by mass: 15-25 parts of a waterborne epoxy resin emulsion, 0.1-1 part of a hydrophilic anti-settling agent and 0-10 parts of water; and the mass ratio of the component A to the component B is (2-4): 1. The waterborne epoxy zinc-rich coating has the characteristics of excellent storage stability, simple preparation method, water-based environmental protection, good construction performance and excellent corrosion resistance, and has a very wide application prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based epoxy zinc-rich coating and a preparation method thereof. Background technique [0002] Epoxy zinc-rich primer occupies a pivotal position in the field of heavy-duty corrosion protection and has a very wide range of applications. However, traditional oil-based epoxy zinc-rich coatings have caused great harm to the environment due to their high VOCs content. Water-based epoxy zinc-rich paint has the advantages of environmental protection, and its performance is almost the same as that of oil. It is one of the best choices to replace oil-based epoxy zinc-rich paint. [0003] However, due to the existence of moisture and the large proportion of zinc powder in water-based epoxy zinc-rich primers, zinc powder is prone to water absorption, failure and sedimentation, resulting in poor stability. The main points are: 1. Poor storage stability of finished products (or shor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/10C09D163/00C09D7/62C09D7/45
CPCC08K2003/0893C09D5/106C09D163/00C09D7/45C09D7/62C09D7/70C08K13/06C08K9/10C08K3/08C08K7/26C08K3/346
Inventor 刘瑞清欧小琼
Owner GUANGZHOU JOINTAS CHEM
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