Self-repairing heavy-duty anti-corrosion coating and preparation method thereof

A self-healing and heavy-duty anti-corrosion technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as failure of anti-corrosion function, poor mechanical properties, and difficulty in further improving anti-corrosion performance.

Active Publication Date: 2021-09-14
广东东明新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional glass flake anti-corrosion coating has poor mechanical properties, and it is difficult to further improve the anti-corrosion performance
On the other hand, once the coating is damaged due to impact, cracking and other factors, pitting corrosion that is difficult to detect with the naked eye is prone to occur at the damaged site, especially the small damaged site, and then causes corrosion to spread, resulting in the failure of its anti-corrosion function

Method used

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  • Self-repairing heavy-duty anti-corrosion coating and preparation method thereof
  • Self-repairing heavy-duty anti-corrosion coating and preparation method thereof
  • Self-repairing heavy-duty anti-corrosion coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0029] In one embodiment, a self-healing heavy-duty anti-corrosion coating includes a self-healing mixture and a curing agent, and the mass ratio of the self-healing mixture to the curing agent is 6-10:1; wherein, the self-healing mixture includes the following mass Raw materials in parts: 30-50 parts of epoxy resin, 10-40 parts of glass flakes, 2-15 parts of self-repairing microcapsules, 10-30 parts of diluent, 3-5 parts of coupling agent and 1-10 parts of toughening agent share.

[0030] It should be noted that, after the coating is cured into a coating, the glass flakes can be arranged parallel and oriented to overlap, which can form a barrier to the corrosive medium. Effectively increase the penetration path of corrosive media such as water, oxygen, and ions, thereby greatly improving the anti-corrosion performance of epoxy resin. Among them, the self-healing microcapsules can endow the coating with an active anti-corrosion function. When the coating is slightly damaged, ...

Embodiment 1

[0053] S111, for 30kg epoxy resin, 10kg glass flakes, 3kg vinyltriethoxysilane, 0.75kg carboxymethyl cellulose, 0.25kg bentonite and 5kg acetone, use a high-speed shearing machine to seal and stir at a speed of 1200rmp / min 6h, the first standby mixture was obtained.

[0054] S121, 2 kg of self-healing microcapsules and 5 kg of acetone were sealed and stirred for 1 hour at a speed of 1200 rpm with a high-speed shear to obtain a second standby mixture. The self-healing microcapsules are porous ceramic particles loaded with benzotriazole, and the specific surface area of ​​the porous ceramic particles is 100m 2 / g, the loading of benzotriazole is 1wt%.

[0055] S131, using a high-speed shearer to seal and stir the first standby mixture and the second standby mixture at a speed of 1200 rpm for 1 hour to obtain a self-healing mixture.

[0056] S141, 10 kg of the self-repairing mixture and 1 kg of curing agent were sealed and stirred at a speed of 1200 rpm / min for 1 hour with a hi...

Embodiment 2

[0058] S112, to 50kg epoxy resin, 40kg glass flakes, 5kg isopropyl three (isostearyl) titanate, 8kg hydroxymethyl cellulose, 2kg lithium diatomaceous earth and 15kg ethanol, adopt high-speed shearing machine at 800rmp / The mixture was sealed and stirred at a speed of 12 h for 12 h to obtain the first standby mixture.

[0059] S122, 15kg of self-healing microcapsules and 15kg of ethanol were sealed and stirred at a speed of 800rmp / min for 2 hours with a high-speed shearer to obtain a second standby mixture. The self-healing microcapsules are porous ceramic particles loaded with tolylbenzotriazole, and the specific surface area of ​​the porous ceramic particles is 850m 2 / g, the loading of tolylbenzotriazole is 50wt%.

[0060] S132. Use a high-speed shearer to seal and stir the first standby mixture and the second standby mixture at a speed of 800 rpm for 2 hours to obtain a self-healing mixture.

[0061] S142, 6 kg of the self-repairing mixture and 1 kg of curing agent were s...

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Abstract

The invention relates to the field of anti-corrosion coatings, and discloses a self-repairing heavy-duty anti-corrosion coating, which includes a self-repairing mixture and a curing agent, and the mass ratio of the self-repairing mixture to the curing agent is 6-10:1; wherein the self-repairing mixture includes the following parts by mass Raw materials: 30-50 parts of epoxy resin, 10-40 parts of glass flakes, 2-15 parts of self-repairing microcapsules, 10-30 parts of diluent, 3-5 parts of coupling agent and 1-10 parts of toughening agent. The self-repairing microcapsules include porous particles and repairing reagents. The invention can fill the gaps between the glass flakes through the porous particles, and can effectively absorb the corrosive medium at the same time, greatly increasing the penetration resistance of the corrosive medium; the coating can be endowed with an active anti-corrosion function through the repair reagent, and when tiny cracks appear in the coating or damage, the repair agent will be released from the porous particles and be adsorbed to the surface of the metal substrate to form a repair film to prevent the contact between the corrosive medium and the metal substrate, thereby preventing the further occurrence and spread of corrosion.

Description

technical field [0001] The invention relates to the field of anticorrosion coatings, in particular to a self-repairing heavy anticorrosion coating and a preparation method thereof. Background technique [0002] Corrosion has become a serious problem faced by countries all over the world. According to statistics, the annual economic loss caused by corrosion in my country exceeds 2 trillion yuan, which is greater than 3% of my country's GDP. This figure exceeds the sum of the annual economic losses caused by various natural disasters. At present, my country has a large number of various structural facilities that have been built or are under construction in various important fields such as offshore oil and gas field development, port construction, sea-crossing bridges, submarine tunnels, ship engineering, and deep-sea exploration. Corrosion occurs. Once the corrosion is severe, it will cause serious damage and huge economic losses. In order to meet the corrosion requirements...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/63C09D7/65
CPCC09D5/08C09D163/00C09D7/63C09D7/65C08L1/286C08K13/06C08K7/00C08K3/40C08K9/12C08K5/3475C08L1/284C08K5/47C08L29/04C08K5/3437
Inventor 黄双武王军鹏况金权
Owner 广东东明新材科技有限公司
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