Self-detection water-based self-repairing anticorrosive paint and preparation method thereof

A technology of anti-corrosion coatings and water-based coatings, applied in anti-corrosion coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems that micro cracks are not easy to be found, and achieve the effect of easy detection and positioning, and outstanding effect

Pending Publication Date: 2021-01-05
青岛羚智涂料科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problem that the microcracks in the existing self-healing coatings are not easy to be found, the present invention provides a self-detecting water-based self-healing anti-corrosion coating and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A self-detecting water-based self-repairing anti-corrosion coating, comprising 80% water-based resin matrix and 20% self-detecting self-repairing capsules, characterized in that the self-detecting self-repairing capsules include capsule walls and capsule cores, and the capsule cores include water-based Paint restorer and developer. Wherein, the water-based resin matrix is ​​selected from water-based polyurethane resins. The chromogenic agent is hydroxyquinoline, and the chromogenic agent is loaded on the surface of graphene. In the capsule core, the mass percentage of the color developer is 5%, and the mass percentage of the water-based paint repair agent is 95%.

[0026] The water-based paint repair agent is a multiple repair agent with multiple repair functions and can realize repeated repair of the paint layer. It is selected from the diamine adduct crosslinking agent in CN 104045810A.

[0027] The preparation method of self-detection self-repair capsule is:

[00...

Embodiment 2

[0031] A self-detecting water-based self-repairing anti-corrosion coating, comprising 70% water-based resin matrix and 30% self-detecting self-repairing capsules, characterized in that, the self-detecting self-repairing capsules include capsule walls and capsule cores, and the capsule cores include water-based Paint restorer and developer. Wherein, the water-based resin matrix is ​​selected from water-based acrylic resins. The chromogenic agent is hydroxyquinoline, and the chromogenic agent is loaded on the surface of graphene. In the capsule core, the mass percentage of the color developer is 2%, and the mass percentage of the water-based paint repair agent is 98%.

[0032] The water-based paint repair agent is a single repair agent with only a single repair function, which is a reaction between polyhydroxyl or polyamino compounds and isocyanate to generate isocyanate derivatives.

[0033] The preparation method of self-detection self-repair capsule is:

[0034] (1) Loadin...

Embodiment 3

[0037] A self-detecting water-based self-repairing anti-corrosion coating, including 90% water-based resin matrix and 10% self-detecting self-repairing capsule, is characterized in that, the self-detecting self-repairing capsule includes a capsule wall and a capsule core, and the capsule core includes a water-based Paint restorer and developer. Wherein, the water-based resin matrix is ​​selected from water-based epoxy resins. The chromogenic agent is hydroxyquinoline, and the chromogenic agent is loaded on the surface of graphene. In the capsule core, the mass percentage of the color developer is 10%, and the mass percentage of the water-based paint repair agent is 90%.

[0038] Water-based paint repair agent is a single repair agent with only a single repair function, which is a liquid epoxy resin.

[0039] The preparation method of self-detection self-repair capsule is:

[0040](1) Loading of chromogenic agent, prepare a certain concentration of graphene aqueous dispersio...

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PUM

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Abstract

The invention relates to a self-detection water-based self-repairing anticorrosive paint, which comprises 70-90% of a water-based resin matrix and 10-30% of a self-detection self-repairing capsule, and is characterized in that the self-detection self-repairing capsule comprises a capsule wall and a capsule core, and the capsule core comprises a water-based paint repairing agent and a color developing agent. The color developing agent can react with metal ions and generate color developing reaction, and the color developing agent is selected from one or more of hydroxyquinoline, 1, 10 phenanthroline and thymol blue. According to the self-repairing capsule, the color developing agent is added into an existing self-repairing capsule to serve as a capsule core, when the capsule is torn due tomicro-cracks appearing in a local area in a coating layer, the color developing agent in the capsule can be released, color changes can be observed with naked eyes at the initial stage of corrosion reaction of a micro-crack area, and the self-detecting and early-warning effects are achieved; and meanwhile, a micro-crack area is easily found and positioned, and the position is pointed out for repairing of the coating layer.

Description

technical field [0001] The invention relates to the field of water-based self-repairing anti-corrosion coatings, in particular to a self-testing water-based self-repairing anti-corrosion coating and a preparation method thereof. Background technique [0002] Metal materials are easily corroded and damaged by oxygen and moisture in the environment during use, which affects subsequent use. In order to avoid or slow down the occurrence of this situation, a common method is to apply water-based anti-corrosion coatings on the surface of metal materials. However, anti-corrosion coatings cannot absolutely guarantee the anti-corrosion of metal materials, because anti-corrosion coatings will also be damaged by impacts and scratches from the external environment during use, thus forming microcracks or openings in the coating layer. The local area of ​​the paint layer loses its protective effect on the metal material. [0003] In order to solve the impact of the damage of the coating ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D163/00C09D123/12C09D7/65C09D7/63C09D5/08
CPCC09D175/04C09D163/00C09D123/12C09D7/65C09D7/70C09D7/63C09D5/08C08L2205/025
Inventor 李跃平
Owner 青岛羚智涂料科技有限责任公司
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