Silicon dioxide microcapsule self-repairing anticorrosive paint and preparation method thereof

A technology of anti-corrosion coatings and silica, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of low repair rate and complex production process, achieve high load capacity, simple preparation process, and improve flow sexual effect

Inactive Publication Date: 2020-07-31
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low repair rate and complex production process in the current microcapsule self-healing anticorrosion coating, the present invention proposes a silica microcapsule self-healing anticorrosion coating and a preparation method thereof, thereby improving the repair efficiency of the self-healing anticorrosion coating and prolonging the production process. The service life is extended, and the price of raw materials is low, the process is simple, and the preparation cost is low

Method used

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  • Silicon dioxide microcapsule self-repairing anticorrosive paint and preparation method thereof
  • Silicon dioxide microcapsule self-repairing anticorrosive paint and preparation method thereof
  • Silicon dioxide microcapsule self-repairing anticorrosive paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Add 1.5kg of 2-mercaptobenzothiazole into 22 kg of ether, disperse evenly, and form an oil phase;

[0040] (2) Dissolve 2 kg of ammonia water and 1.5 kg of dodecyltrimethylammonium bromide in 40 kg of water to form a water phase, then add 35 kg of oil phase during stirring and disperse evenly, then add dropwise 3.5 kg of four Ethoxyethyl orthosilicic acid was reacted at room temperature for 1 h to obtain an emulsion;

[0041] (3) Aging the emulsion in a closed container at a temperature of 30°C for 26 hours, then centrifugally washing and drying the obtained precipitated capsules to obtain the silica-coated corrosion inhibitor capsule material;

[0042] (4) Combine 2kg of silica-coated corrosion inhibitor capsule material, 15kg of polyurethane emulsion with a mass concentration of 12%, 10kg of acrylic emulsion with a mass concentration of 15%, 1.2kg of mica powder, and 0.1kg of polyether modified silicone Foaming agent and 0.125kg fumed silica were dispersed at a h...

Embodiment 2

[0044] (1) Add 1.2 kg of benzotriazole and its derivatives into 28 kg of ether, disperse evenly, and form an oil phase;

[0045] (2) Dissolve 1.5 kg of ammonia water and 1.2 kg of sodium dodecylsulfonate in 45 kg of water to form a water phase, then add 40 kg of oil phase during stirring and disperse evenly, then add dropwise 2.5 kg of tetraethoxy Ethyl orthosilicic acid was reacted at room temperature for 0.5h to obtain an emulsion;

[0046] (3) Aging the emulsion in a closed container at a temperature of 28°C for 27 hours, then centrifuging and drying the obtained precipitated capsules to obtain the silica-coated corrosion inhibitor capsule material;

[0047] (4) 3kg of silica-coated corrosion inhibitor capsule material, 12kg of polyurethane emulsion with a mass concentration of 12%, 10kg of acrylic emulsion with a mass concentration of 15%, 1kg of talc powder, and 0.1kg of polyether modified silicone defoaming agent, 0.12 kg of fumed silica was dispersed at a high speed of...

Embodiment 3

[0049] (1) Add 1.8 kg of tetrazole derivatives into 20 kg of ether, disperse evenly, and form an oil phase;

[0050] (2) Dissolve 2.5 kg of ammonia water and 1.8 kg of sorbitan polyoxyethylene ester in 35 kg of water to form a water phase, then add 30 kg of oil phase during stirring and disperse evenly, then add dropwise 4 kg of tetraethoxyethylene Based orthosilicic acid, reacted at room temperature for 1h to obtain an emulsion;

[0051] (3) Aging the emulsion in a closed container at a temperature of 32°C for 25 hours, and then centrifugally washing and drying the obtained precipitated capsules to obtain a silica-coated corrosion inhibitor capsule material;

[0052] (4) Combine 2kg of silica-coated corrosion inhibitor capsule material, 15kg of polyurethane emulsion with a mass concentration of 12%, 10kg of acrylic emulsion with a mass concentration of 15%, 1.5kg of mica powder, and 0.1kg of polyether modified silicone The foaming agent and 0.1 kg of fumed silica were disper...

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Abstract

The invention provides silicon dioxide microcapsule self-repairing anticorrosive paint and a preparation method thereof. The self-repairing anticorrosive paint is prepared by the following steps: dispersing an oil phase formed by a corrosion inhibitor and diethyl ether into a water phase formed by ammonia water, an emulsifier and water; then dropwise adding tetrakis(2-ethoxyethyl) orthosilicate for reaction to obtain an emulsion, then ageing, washing with water and drying to obtain a self-repairing microcapsule material; and then uniformly stirring the microcapsule material, a polyurethane emulsion, an acrylic emulsion, a filler, a defoaming agent and a thixotropic agent. According to the self-repairing anticorrosive paint provided by the invention, the microcapsule material formed by coating the corrosion inhibitor with silicon dioxide is added, and the corrosion inhibitor is good in flowability, high in activity and good in stability, so that the self-repairing efficiency of the paint is improved, the service lifetime is effectively prolonged, the price of used materials is low, the process is simple, the preparation cost is low, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of anticorrosion coatings, in particular to a silica microcapsule self-repairing anticorrosion coating and a preparation method thereof. Background technique [0002] Anti-corrosion coatings are widely used in modern industry, transportation, energy, marine engineering and other departments. Anti-corrosion coatings refer to coatings that can form a thin film on the surface of an object under certain conditions to provide protection, decoration or other special functions. A class of liquid or solid material. With the continuous expansion of the application range of anti-corrosion coatings, its technical requirements are also continuously improved. During the use of anti-corrosion coatings, as a result of mechanical damage and chemical damage to the coating film, the following situations are prone to occur: damage to the surface of the coating film (such as scratches), gaps reaching the metal surface of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D133/04C09D5/08
CPCC09D5/08C09D175/04C08L33/04C08K9/10C08K5/378C08K5/3475C08K5/3472
Inventor 陈庆陈巧和司文彬陈涛白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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