Liquid level coating material of wet-process smelting electrolytic zinc negative plate and preparation method for liquid level coating material

A hydrometallurgical, electrolytic zinc technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor stress corrosion resistance, easy cracking of coatings, poor heat and acid resistance, etc., to achieve resistance to stress corrosion. Good performance, good protection and improved water resistance

Inactive Publication Date: 2019-04-12
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, epoxy resin, polyurethane, vinyl ester resin coating or chloroprene, chlorosulfonated, amino and other modified epoxy resin coatings are used to protect the liquid level of the electrolytic zinc cathode plate in wet smelting, which has poor heat and acid resistance. , Poor stress corrosion resistance and other defects, the coating is easy to crack, peel off and peel under repeated manual or mechanical zinc stripping shocks, thus losing protection, which is not conducive to application

Method used

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  • Liquid level coating material of wet-process smelting electrolytic zinc negative plate and preparation method for liquid level coating material
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  • Liquid level coating material of wet-process smelting electrolytic zinc negative plate and preparation method for liquid level coating material

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Embodiment 1

[0021] A liquid surface coating for hydrometallurgy electrolytic zinc cathode plate, which is formed by mixing component 1 and component 2 according to the ratio of OH / NCO=1:1.1 (molar ratio), and the component 1 is polymethylene polybenzene Based polyisocyanate, the second component is composed of the following raw materials in weight percent: ring-opening epoxy resin 16%, maleic anhydride graft modified SEBS resin SEBS FG1901GT 5%, chromium oxide green 18%, graphite 5%, 4% of boron nitride, 0.2% of BYK-052, 30% of xylene, and 21.8% of cyclohexanone. The ring-opening epoxy resin is composed of the following raw materials in weight percentage: 16% of soybean oil with an acid value of 191, 16% of cyclohexanone Oxygen value 0.18 epoxy 601 powder resin 56%, xylene 10%, cyclohexanone 18%.

[0022] The preparation of the hydrometallurgy electrolytic zinc cathode plate liquid surface coating comprises the following steps:

[0023] A. Add soy oil, epoxy 601 powder resin, and xylene ...

Embodiment 2

[0029] A liquid surface coating for hydrometallurgy electrolytic zinc cathode plate, which is formed by mixing component 1 and component 2 according to the ratio of OH / NCO=1:1.1 (molar ratio), and the component 1 is polymethylene polybenzene Based polyisocyanate, the second component is composed of the following raw materials in weight percent: ring-opening epoxy resin 20%, maleic anhydride graft modified SEBS resin Taipol7131 4.7%, chromium oxide green 18%, molybdenum disulfide 4% , boron nitride 3%, BYK-066N 0.3%, cyclohexanone 20%, butyl acetate 30%, described ring-opening epoxy resin is made up of the raw material of following weight percentage content: the coconut oil 18% of acid number 191 , epoxy value 0.22 epoxy 601 powder resin 54%, xylene 12%, butyl acetate 16%.

[0030] The preparation of the hydrometallurgy electrolytic zinc cathode plate liquid surface coating comprises the following steps:

[0031] A. Add coconut oil, epoxy 601 powder resin, and xylene into the ...

Embodiment 3

[0037] A liquid surface coating for hydrometallurgy electrolytic zinc cathode plate, which is formed by mixing component 1 and component 2 according to the ratio of OH / NCO=1:1.1 (molar ratio), and the component 1 is polymethylene polybenzene Based polyisocyanate, the component two is composed of the following raw materials in weight percent: ring-opening epoxy resin 18%, maleic anhydride graft modified SEBS resin M1943 3%, chromium oxide green 22%, graphite 3%, two Molybdenum sulfide 3%, BYK-085 0.4%, xylene 30%, butyl acetate 20.6%, and the described ring-opening epoxy resin is made up of the raw material of following weight percentage content: acid value 193 soybean oil 17%, epoxy Epoxy 601 powder resin with a value of 0.20 55%, xylene 11%, cyclohexanone 17%.

[0038] The preparation of the hydrometallurgy electrolytic zinc cathode plate liquid surface coating comprises the following steps:

[0039]A. Add soy oil, epoxy 601 powder resin, and xylene into the reactor, heat up...

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Abstract

The invention discloses a liquid level coating material of a wet-process smelting electrolytic zinc negative plate and a preparation method for the liquid level coating material. The coating materialis prepared from a component I and a component II in accordance with that OH / NCO=1: 1.1, wherein the component I is polymethylene polyphenyl polyisocyanate, the component II is prepared from the following raw materials in percentage by weight: 16% to 20% of ring-opening epoxy resin, 3% to 5% of maleic anhydride graft-modified SEBS resin, 18% to 22% of chrome oxide green, 6% to 9% of filler, 0.2% to 0.4% of antifoamer and 50% to 55% of mixed solvent A; and the ring-opening epoxy resin is prepared from the following raw materials in percentage by weight: 16% to 18% of octadeca long-chain carboxylic acid, 54% to 56% of powdered epoxy resin, 10% to 12% of xylene and 16% to 18% of mixed solvent B. According to the liquid level coating material and the preparation method therefor, all the components are combined in a specific proportioning ratio to exert a synergistic effect, and thus, the components can be firmly combined to a metal aluminum substrate; the heat resistance and acid resistance are good, the stress corrosion resistance is good, the mechanical properties are excellent, and a paint film has good protection to the metal aluminum substrate, so that the service life of the negative plate can be effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrolytic zinc in hydrosmelting, and in particular relates to a liquid surface coating for electrolytic zinc cathode plates in hydrosmelting. Background technique [0002] Hydrometallurgy electrolytic zinc is currently the world's mainstream metal zinc smelting process. During the electrolysis process, most of the cathode aluminum plate in the metal zinc hydrometallurgy electrolysis workshop is immersed in the electrolyte, and a small part is exposed to the air, and the part exposed to the air is between the gas-liquid phase interface. In direct contact with oxygen, carbon dioxide, and sulfuric acid mist in the air, the medium of these gas-liquid phase interfaces forms an electrochemical corrosion environment on the surface of the aluminum plate, and the aluminum plate in this environment will be severely electrochemically corroded. In addition, the position of the liquid surface is exactly the stress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/61C09D5/08
CPCC08K2003/385C09D5/08C09D7/61C09D175/04C08K3/04C08K3/38
Inventor 李清材于建龙吴明霞滕志春
Owner 中昊北方涂料工业研究设计院有限公司
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