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A kind of self-healing water-based epoxy elastic composite coating material and preparation method thereof

A water-based epoxy and coating material technology, applied in the field of coatings, can solve the problems of slow repair speed, inability to protect the substrate, and high price, and achieve the effect of fast self-repairing speed and good repairing effect.

Active Publication Date: 2019-06-25
深圳市京兰新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The various self-healing coatings mentioned above mostly use chemical reaction microcapsules as the repairing agent for coating damage. Large area use in highway field

Method used

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  • A kind of self-healing water-based epoxy elastic composite coating material and preparation method thereof
  • A kind of self-healing water-based epoxy elastic composite coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of self-healing water-based epoxy elastic composite coating material described in this embodiment comprises the following raw materials in parts by mass:

[0046] Component A: 20 parts of water-based epoxy resin emulsion, 7 parts of VAE emulsion, and 8 parts of acrylate emulsion;

[0047] Component B: 20 ​​parts of water-based epoxy curing agent, 5 parts of talc powder, 20 parts of rutile titanium dioxide, 0.6 parts of TEGO ViscoPlus3030 water-based polyurethane thickener, 0.5 parts of BYK-019 defoamer, 0.6 parts of DC-57 leveling agent 0.4 parts of BYK-3840 ultraviolet absorber, 0.4 parts of antioxidant 264, 17.5 parts of industrial water;

[0048] Component C: 15 parts of microcapsule dispersion.

[0049] Wherein the preparation method of microcapsule dispersion liquid, completes according to the following steps:

[0050] The first step, the preparation of HMDI prepolymer:

[0051] Weigh 25 parts of polyoxypropylene polyol N220 into the reactor, dehydrate at...

Embodiment 2

[0063] A kind of self-healing water-based epoxy elastic composite coating material described in this embodiment comprises the following raw materials in parts by mass:

[0064] Component A: 25 parts of water-based epoxy resin emulsion, 5 parts of VAE emulsion, and 5 parts of acrylate emulsion;

[0065] Component B: 25 parts of water-based epoxy curing agent, 3 parts of talc powder, 15 parts of rutile titanium dioxide, 0.3 parts of HT-820 water-based polyurethane thickener, 0.1 part of Tech-365W defoamer, BYK-333 leveling agent 0.2 parts, 0.2 parts of UV-2 ultraviolet absorber, 0.2 parts of KL-1061 antioxidant, 21 parts of industrial water;

[0066] Component C: 22 parts of microcapsule dispersion.

[0067] Wherein the preparation method of microcapsule dispersion liquid, completes according to the following steps:

[0068] The first step, the preparation of HMDI prepolymer:

[0069] Weigh 25 parts of polyoxypropylene polyol N220 into the reactor, dehydrate at 120°C and -0.0...

Embodiment 3

[0081] A kind of self-healing water-based epoxy elastic composite coating material described in this embodiment comprises the following raw materials in parts by mass:

[0082] Component A: 21 parts of water-based epoxy resin emulsion, 7 parts of VAE emulsion, and 7 parts of acrylate emulsion;

[0083] Component B: 21 parts of water-based epoxy curing agent, 4.5 parts of talc powder, 19 parts of rutile titanium dioxide, 0.6 part of TEGOViscoPlus3030 water-based polyurethane thickener, 0.5 part of DC-71 defoamer, 0.6 part of DC-57 leveling agent , 0.4 parts of BYK-3840 ultraviolet absorber, 0.4 parts of 2,6-di-tert-butyl-p-cresol antioxidant, 18 parts of industrial water;

[0084] Component C: 17 parts of microcapsule dispersion.

[0085] Wherein the preparation method of microcapsule dispersion liquid, completes according to the following steps:

[0086] The first step, the preparation of HMDI prepolymer:

[0087] Weigh 25 parts of polyoxypropylene polyol N220 into the reac...

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Abstract

The invention relates to a self-repairing water-based epoxy compound elastic coating material and a preparation method of the material and belongs to the technical field of paint. The method comprisesthe steps of dispersing macroporous adsorbent resin adsorbing a saturated HMDI (hexamethylene diisocyanate) prepolymer, a latent curing agent and a catalyst mixture and a high water absorber in a paraffin molten mass to prepare macroporous adsorbent resin-water absorber microcapsules, dispersing the microcapsules in water to form microcapsule dispersing liquid, and mixing and curing the microcapsule dispersing liquid, water-based epoxy resin, a water-based epoxy curing agent and the like for film formation to form the water-based epoxy compound elastic coating material with a self-repairing function. When a coating layer is scratched, or a base material deforms and generates a crack, the high water absorber in the microcapsules can adsorb moisture in the air to expand; and the HMDI prepolymer and the latent curing agent can quickly react with groups, such as alkylol amine, generated by the moisture or the water to generate a polyurethane-urea cured substance for synergic repair of thecrack. The material can be used for the highway fields of tunnels, bridges, concrete fender walls, metal guardrails and the like and has effects of corrosion resistance, water resistance, attractiveness, visual fatigue reduction and the like.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a self-repairing water-based epoxy elastic composite coating material and a preparation method thereof. Background technique [0002] In recent years, the mileage of my country's highways has increased rapidly, which is particularly important for the anti-corrosion and waterproof protection of highway concrete protective walls and metal guardrails. With the increase of the service life of the road, the road protective walls and metal guardrails are severely eroded by rainwater, salt water, and acid mist. Although some protective walls and guardrails are painted with protective paint, the stones kicked up by the wheels at high speed Under the impact, cracks or micropores will be generated. Under the erosion of rainwater, deicing agent salt water and acid mist, the exposed concrete or metal parts will be gradually corroded and deteriorated, reducing the strength. In v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C09D7/63C09D7/65C08G18/75C08G18/48C08G18/32C08G18/66C08G18/10B01J13/08
Inventor 姚亮王宏斌陈峰阳丛国清高俊亮李万捷
Owner 深圳市京兰新材科技有限公司
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