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Scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating and preparation method thereof

A technology of inorganic zinc silicate and flaky zinc, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of damage delamination, reduced anti-corrosion effect, easy precipitation, etc., to achieve enhanced anti-corrosion effect, Effect of reduced unevenness and large electrical contact area

Inactive Publication Date: 2011-04-06
湖北中科博策新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the content of zinc powder in the coating is too high, the coating will be easily porous, causing lateral copolymerization to damage and delaminate. If other high solid content topcoat is applied on the zinc-rich primer, it will make the topcoat tend to generate bubbles Increase
Zinc is a heavy metal. It is difficult to disperse during the production and preparation of coatings. It is prone to precipitation and cake formation during storage. Although it can be solved by sub-packaging zinc powder, it is still easy to precipitate during application and requires constant stirring to ensure The zinc content in the formed paint film is the same as the formulation design
If the coating film is thickened in order to enhance the anti-corrosion ability of the coating, the coating will shrink during the drying process, which is prone to cracks, which is especially obvious in inorganic zinc-rich coatings, and the anti-corrosion effect is obvious. reduce

Method used

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  • Scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating and preparation method thereof
  • Scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating and preparation method thereof
  • Scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] according to figure 1 , figure 2 Shown, a kind of scaly zinc-based inorganic zinc silicate heavy anticorrosion paint, its preparation method steps are as follows:

[0039] (1) Prepare component A for subsequent use

[0040] ①Put 12kg of absolute ethanol in a container and stir, then put in 5kg of epoxy resin E44 to dissolve it for later use;

[0041] ②Put 12kg of ethylene glycol and 6kg of xylene into a container and stir, then put 6kg of 202P (polyethylene wax) into it to disperse it for later use;

[0042] ③Mix the dissolved ① and ② in the container, then slowly add 59kg of zinc powder (flaky) to fully disperse it, and seal it tightly after dispersing;

[0043] (2) Prepare component B for subsequent use

[0044] Put 60kg tetraethyl orthosilicate, 2.5kg methyltriethoxysilane, 2.5kg r(2,3-epoxypropoxy)propyltrimethoxysilane, 10kg isopropanol, 20kg absolute ethanol into the reaction Stir in the kettle, heat up to 60°C, slowly add 5kg (about) acidified water (zinc c...

Embodiment 2

[0048] (1) Prepare component A for subsequent use

[0049] ①Put 16kg of absolute ethanol into the container and stir, then add 3kg of polyvinyl butyral to dissolve it for later use;

[0050] ②Put 16kg of 7-diol and 8kg of xylene into a container and stir, then put 4kg of 202P (polyethylene wax) into it to disperse it for later use;

[0051] ③Mix the dissolved ① and ② in the container, then slowly add 53kg of zinc powder (flaky) to fully disperse it, and seal it tightly after dispersing;

[0052] (2) Prepare component B for subsequent use

[0053] Put 50kg of tetraethyl orthosilicate, 3kg of r(2,3-glycidoxy)propyltrimethoxysilane, 12kg of isopropanol, and 25kg of absolute ethanol into the reaction kettle and stir, raise the temperature to 60°C, and slowly Add 10kg (approximately) acidified water (zinc chloride 0.5kg, hydrochloric acid 0.3kg, deionized water 9.2kg) dropwise, and react at 60-68°C for 1 hour after the dropwise addition; it can be used after cooling down and seal...

Embodiment 3

[0056] (1) Prepare component A for subsequent use

[0057] ①Put 20kg of absolute ethanol into the container and stir, then put in 1.6kg of epoxy resin E44 to dissolve it for later use;

[0058] ②Put 20kg of ethylene glycol and 10kg of xylene into a container and stir, then put 2kg of 202P (polyethylene wax) into it to disperse it for later use;

[0059] ③Mix the dissolved ① and ② in the container, then add 46.4kg of zinc powder (flaky) slowly to make it fully dispersed, and seal the package after dispersion;

[0060] (2) Prepare component B for subsequent use

[0061]Put 37.8kg of ethyl orthosilicate, 2.2kg of methyltriethoxysilane, 17kg of isopropanol, and 28kg of absolute ethanol into the reaction kettle and stir, raise the temperature to 60°C, and slowly add 15kg (approx.) of acidified water dropwise (Zinc chloride 0.75kg, hydrochloric acid 0.45kg, deionized water 13.8kg), react at 60-68°C for 1 hour after the dropwise addition; cool down, seal the package and place it fo...

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Abstract

The invention relates to scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating and a preparation method thereof. The method comprises the following steps of: (1) mixing scaly zinc powder with initial film forming resin according to the weight ratio of components to obtain a component A; (2) mixing a hydrolyzing silicon solution with a modifier by stirring at intermediate speed according to the weight ratio of the components, adding a catalyst for hydrolyzing according to the weight ratio of the components and hydrolyzing to obtain a component B; and (3) mixing the component A and the component B which are prepared in the step (1) and the step (2) according to the component weight ratio of (1-1.5):1 to obtain the scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating. The invention has the advantage of preparing the scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating by mainly adopting domestic scaly zinc powder. Compared with traditional zinc rich primer, the invention can greatly reduce the zinc powder content and coating thickness; the traditional zinc rich primer generates large zinc fog in the coating welding process, and the scaly zinc powder primer generates less zinc fog, reduces damage to construction staffs and is a new generation product of the traditional inorganic and organic zinc rich primer.

Description

technical field [0001] The invention relates to the technical field of fine chemical coatings, in particular to a scaly zinc-based inorganic zinc silicate heavy anticorrosion coating and a preparation method thereof. Background technique [0002] Zinc-rich paint is one of the commonly used primers in my country's heavy anti-corrosion paint system. There are two kinds of shop primers and anti-rust primers. Their anti-corrosion principle is to protect the steel at the expense of zinc dust in corrosive environments, even if the coating surface is damaged or scratched. Therefore, in order to make the coating conductive and play the role of a sacrificial anode, the coating requires a large amount of zinc powder particles, which are in contact with each other and maintain electrical contact with the steel substrate. The corrosion inhibition mechanism of zinc-rich primer is similar to that of continuous electroplating film. American SSPC paint stipulates that the content of zinc p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D163/02C09D5/10
Inventor 龙光斗黄澄华李训生金广泉
Owner 湖北中科博策新材料研究院
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