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Multifunctional additives for water-based anticorrosion coatings, anticorrosion coatings and their applications

A multi-functional additive, anti-corrosion coating technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, epoxy resin coatings, etc., can solve the problems of limited use, poor water solubility, poor compatibility, etc. The effect of improved anti-corrosion effect and good stability

Active Publication Date: 2018-10-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some polymers (such as polypyrrole, polyaniline, polythiophene and their derivatives) limit their use due to poor water solubility, poor machinability, and poor compatibility with resins.

Method used

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  • Multifunctional additives for water-based anticorrosion coatings, anticorrosion coatings and their applications
  • Multifunctional additives for water-based anticorrosion coatings, anticorrosion coatings and their applications
  • Multifunctional additives for water-based anticorrosion coatings, anticorrosion coatings and their applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of multifunctional auxiliary agent: Weigh 30 g of polyvinylpyrrolidone, dissolve it in 10 g of ethylene glycol, slowly add dimethyl sulfate 5 times its molar mass under stirring, and react at room temperature for 12 hours. The product was vacuum-dried at room temperature for 24 hours to obtain modified polyvinylpyrrolidone. Then, the modified polyvinylpyrrolidone and the water-soluble benzotriazole are mixed according to the ratio of 5:1 and dissolved in water to form a multifunctional auxiliary agent, which is packaged for future use.

[0040] (2) Weigh 40g of water-based epoxy emulsion, add 4g of the multifunctional additive for stirring and mixing, add 2g of BYK-154 dispersant, 0.3g of BYK-025 defoamer, 0.3g of MH6000 thickener, triethylenetetramine 3g of curing agent, mixed evenly, coated on the surface of the substrate, performance test after complete curing.

Embodiment 2

[0051] (1) Preparation of multifunctional additives: Weigh 30 g of polyacrylamide, dissolve it in 10 g of ethylene glycol, slowly add benzyl chloride 5 times its molar mass under stirring, and react at room temperature for 12 hours. Remove impurities from the product and dry it in vacuum at room temperature for 24 hours to obtain modified polyacrylamide. Then, the modified polyacrylamide and mercaptobenzothiazole are mixed according to the ratio of 3:1 and dissolved in water to form a multifunctional additive, which is packaged for later use.

[0052] (2) Weigh 60g of water-based polyurethane emulsion, add 4g of the multifunctional additive for stirring and mixing, add 2g of BYK-155 dispersant, 0.3g of BYK-094 defoamer, 0.3g of HS6000YP2 thickener, and XC-205 curing agent 6g, mixed evenly, coated on the surface of the substrate, performance test after complete curing.

Embodiment 3

[0063] (1) Preparation of multifunctional additives: Weigh 30 g of hydroxyethyl cellulose, dissolve it in 10 g of ethylene glycol, slowly add dimethyl sulfate 5 times its molar mass under stirring, and react at room temperature for 12 hours. The product was vacuum-dried at room temperature for 24 hours to obtain modified hydroxyethyl cellulose. Then, the modified hydroxyethyl cellulose and the water-soluble benzotriazole are mixed according to the ratio of 4:1 and dissolved in water to form a multifunctional auxiliary agent, which is packaged for later use.

[0064] (2) Weigh 70g of water-based acrylic emulsion, add 6g of the multi-functional additive for stirring and mixing, add 4g of BYK-102 dispersant, 0.2g of BYK-018 defoamer, 0.1g of MH10000 thickener, and DowXL-29SE curing agent 7g, after mixing evenly, apply on the surface of the substrate, and perform performance test after it is completely cured.

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Abstract

The invention discloses a multifunctional auxiliary agent for aqueous anticorrosion paint, anticorrosion paint and a use of the anticorrosion paint. The multifunctional auxiliary agent comprises a modification polymer and a micromolecular additive. The modification polymer is a low molecular weight water-soluble polymer with molecular weight of 100-10000. The modification polymer has a molecular structure containing one or more of N, P, S and O heteroatoms. The anticorrosion paint mainly comprises the multifunctional auxiliary agent, an aqueous composite emulsion and other auxiliary agents. The multifunctional auxiliary agent has excellent corrosion resistance, sterilization, bacteriostasis, high adhesion, good oil-water compatibility and good precipitation resistance, greatly improves corrosion resistance of anticorrosion paint, observably reduces bacterial microbe aggregation and breeding on the paint surface and realizes dual protection effects of bacteriostasis and corrosion resistance. The aqueous anticorrosion paint is suitable for steel material corrosion protection, especially has obvious effects in an acidic corrosion environment and has a good application prospect.

Description

technical field [0001] The invention specifically relates to a multifunctional additive for water-based anticorrosion coatings, anticorrosion coatings and applications thereof, belonging to the technical field of coatings. Background technique [0002] Traditional industrial coatings contain a large amount of organic solvents, which are evaporated during construction and drying, which not only seriously pollutes the environment, but also causes great harm to human health. According to statistics, the total amount of VOC volatilized during the coating process of steel products accounts for about 20%-25% of the total global VOC, and has become one of the main sources of air pollution. Therefore, the use of water-based anti-corrosion coatings instead of solvent-based anti-corrosion coatings for industrial anti-corrosion coatings has very important practical significance for the sustainable development of my country's society and economy. [0003] The anti-corrosion performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D5/14C09D163/00C09D133/00C09D175/04C09D7/61C09D7/65C09D7/63
Inventor 张昕王立敏乌学东
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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