Heavy-anticorrosive epoxy finishing coat and preparation method thereof

An epoxy surface, heavy-duty anti-corrosion technology, used in anti-corrosion coatings, epoxy resin coatings, coatings, etc., to achieve excellent anti-corrosion performance, operational continuity, and reduce surface energy.

Active Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Publication No. CN102352043A discloses an epoxy-polysiloxane resin for coatings and a preparation method thereof, utilizing hydrogenated bisphenol A type epoxy resin and active silicone Oxygen has formulated a heavy-duty anti-corrosion coating whose active functional groups are hydroxyl, methoxy, ethoxy or isocyanate groups. First, the active functional groups react with epoxy resin to prepare compatible epoxy-polysiloxane resin. Although the above-mentioned coating combines the complementary characteristics of epoxy resin and silicone resin, the coating does not contain an absorber for absorbing ultraviolet rays or shielding ultraviolet rays, and the anti-aging performance of the coating is insufficient. At the same time, there are no strong hydrophobic groups on the surface. Will affect the anti-penetration performance and anti-corrosion performance of the coating

Method used

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  • Heavy-anticorrosive epoxy finishing coat and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049](1) Dissolve 5 parts by mass of butyl titanate and 3 parts by mass of dodecylfluoroalkyltrimethoxysilane in 5 parts by mass of xylene solution, add dropwise to 2 parts by mass of isopropanol, 5 parts by mass of In a mixed solution composed of toluene, 0.5 parts by mass of water, and 0.1 parts by mass of nitric acid, react at 25°C for 8 hours;

[0050] (2) To maintain the acidic condition of the system, add 3 parts by mass of water and 40 parts by mass of solvent, and then dropwise add 10 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethyl Oxysilane, 3 parts by mass of dodecafluoroalkyltrimethoxysilane and 10 parts by mass of dimethyldimethoxysilane mixed solution, continue to stir for 8h;

[0051] (3) Add 10 parts by mass of anhydrous sodium sulfate to remove water and filter, add a small amount of ammonia dropwise to adjust the pH of the system to 7~8, react at 50°C for 8 hours; finally add a small amount of concentrated hydrochloric acid to adjust the system to neutra...

Embodiment 2

[0057] Embodiment 2: Change the reaction conditions of (5) and (6), and the rest are the same as in Embodiment 1.

[0058] (1) Dissolve 5 parts by mass of butyl titanate and 3 parts by mass of dodecylfluoroalkyltrimethoxysilane in 5 parts by mass of xylene solution, add dropwise to 2 parts by mass of isopropanol, 5 parts by mass of In a mixed solution composed of toluene, 0.5 parts by mass of water, and 0.1 parts by mass of nitric acid, react at 25°C for 8 hours;

[0059] (2) To maintain the acidic condition of the system, add 3 parts by mass of water and 40 parts by mass of solvent, and then dropwise add 10 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethyl Oxysilane, 3 parts by mass of dodecafluoroalkyltrimethoxysilane and 10 parts by mass of dimethyldimethoxysilane mixed solution, continue to stir for 8h;

[0060] (3) Add 10 parts by mass of anhydrous sodium sulfate to remove water and filter, add a small amount of ammonia dropwise to adjust the pH of the system to 7~8, ...

Embodiment 3

[0064] Embodiment 3: change the reaction condition of (1), all the other are the same as embodiment 1.

[0065] (1) Dissolve 20 parts by mass of butyl titanate and 10 parts by mass of dodecafluoroalkyltrimethoxysilane in 20 parts by mass of xylene solution, add dropwise to 5 parts by mass of isopropanol, 10 parts by mass of In a mixed solution composed of toluene, 2 parts by mass of water, and 0.4 parts by mass of nitric acid, react at 25°C for 8 hours;

[0066] (2) To maintain the acidic condition of the system, add 3 parts by mass of water and 40 parts by mass of solvent, and then dropwise add 10 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethyl Oxysilane, 3 parts by mass of dodecafluoroalkyltrimethoxysilane and 10 parts by mass of dimethyldimethoxysilane mixed solution, continue to stir for 8h;

[0067] (3) Add 10 parts by mass of anhydrous sodium sulfate to remove water and filter, add a small amount of ammonia dropwise to adjust the pH of the system to 7~8, react ...

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Abstract

The invention relates to heavy-anticorrosive epoxy finishing coat and a preparation method thereof. The heavy-anticorrosive epoxy finishing coat is a double-component system, wherein the component A comprises the following ingredients in parts by weight: 100 parts of hydrogenated bisphenol a expoxy resin, 10-30 parts of epoxy resin TDE 85, 5-20 parts of butyl titanate, 5-20 parts of fluorocarbon-containing silane coupling agent, 10-20 parts of an epoxy-containing silane coupling agent, 10-30 parts of other organic silicone precursor, 0.1-5 parts of a dispersing agent, 0.1-5 parts of a flatting agent, 0.1-5 parts of a defoaming agent, 0.1-2 parts of an accelerant and 50-150 parts of a solvent, and the component B is 30-20 parts by mass of an amine curing agent. The heavy-anticorrosive epoxy finishing coat mainly serves as outdoor heavy-anticorrosive finishing coat and has the advantages of excellent ultraviolet-resistance property, anti-yellowing property, good dispersion stability, excellent acid resistance, alkali resistance and salt-spray corrosion resistance, strong adhesive force, good wear-resisting property, self-cleaning property, room temperature curing, simple and convenient construction and the like.

Description

[0001] technical field [0002] The invention relates to a heavy-duty anti-corrosion epoxy finish paint and a preparation method thereof, belonging to the technical field of protective epoxy paint. Background technique [0003] The biggest problem faced by steel in the application process is how to prevent corrosion and prolong its service life. The commonly used methods are: anti-corrosion coating, galvanizing, nickel plating, chrome plating, surface passivation and grease anti-corrosion, etc. Large-scale steel equipment such as bridges, transmission towers, ships, etc. are generally combined with galvanized and anti-corrosion coatings when they leave the factory. After a period of use, especially in harsh environments such as deserts, salt lakes, and severe pollution in my country, the protective layer will inevitably be damaged. , but it is inconvenient to carry out galvanizing operation again. The most effective way is to apply anti-corrosion coating again. Commonly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D183/04C09D7/12C09D5/08
Inventor 唐囡邓静伟刘光明刘志雷
Owner STATE GRID CORP OF CHINA
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