Self-repairing wear-resistant coating and preparation method thereof

A wear-resistant coating and self-healing technology, applied in the coating and other directions, can solve the problems such as the inability to meet the wear resistance requirements of the coating, the inability to delay the coating damage, and the unsatisfactory wear resistance, so as to improve the speed and effect of self-healing. The effect of improving self-healing speed and excellent water resistance

Inactive Publication Date: 2022-03-22
GUANGDONG MAYDOS BUILDING MATERIALS LTD CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing self-healing microcapsule technology mainly relies on external damage to mechanically destroy the microcapsule structure and start the self-healing process of the coating. There is a certain hysteresis in this repairing process. Only when the cracks accumulate to a sufficient level and extend to the capsule can the coating The rupture of the microcapsules triggers the self-repair process, and the more serious the cracking degree of the coating, the greater the tendency of the microcapsules to rupture, and the greater the difficulty of self-repair. Often, the self-repair cannot delay the further damage of the coating. Conditions that cause self-healing to fail
In addition, the wear resistance of existing self-healing coatings is not ideal, and cannot meet people's needs for coatings

Method used

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  • Self-repairing wear-resistant coating and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0033] A self-repairing wear-resistant coating, the preparation method comprising the following steps: weighing 50 parts of polyvinyl acetal modified phenolic resin, 20 parts of calcium naphthenate, 10 parts of methyltrimethoxysilane, latent curing Mix 8 parts of agent and 50 parts of solvent evenly, add 15 parts of self-repairing microcapsules, 3 parts of film-forming agent, and 3 parts of defoamer to it, and stir evenly to obtain self-repairing wear-resistant coating;

[0034] Self-healing microcapsules are prepared by the following steps:

[0035] (1) Dissolve ethyl cellulose and dibutyltin dilaurate in deionized water, heat to 60°C, and stir evenly to obtain an ethyl cellulose solution;

[0036] Wherein, the mass ratio of ethyl cellulose, dibutyltin dilaurate, and deionized water is 1:2.5:3.

[0037] (2) mix polyvinyl acetal modified phenolic resin and emulsifier evenly to obtain emulsion;

[0038] (3) Add the emulsified solution dropwise into the ethyl cellulose solutio...

Embodiment 2

[0041] A self-repairing wear-resistant coating, the preparation method comprising the following steps: weighing 75 parts of polyvinyl acetal modified phenolic resin, 15 parts of calcium naphthenate, 15 parts of methyltrimethoxysilane, latent curing 12 parts of solvent and 60 parts of solvent are mixed uniformly, 22 parts of self-repairing microcapsules, 5 parts of film-forming agent and 5 parts of defoamer are added thereto, and stirred evenly to obtain self-repairing wear-resistant coating;

[0042] Self-healing microcapsules are prepared by the following steps:

[0043] (1) Dissolve ethyl cellulose and dibutyltin dilaurate in deionized water, heat to 65°C, and stir evenly to obtain an ethyl cellulose solution;

[0044] Wherein, the mass ratio of ethyl cellulose, dibutyltin dilaurate, and deionized water is 2:2:4.

[0045] (2) mix polyvinyl acetal modified phenolic resin and emulsifier evenly to obtain emulsion;

[0046] (3) Add the emulsified solution dropwise into the eth...

Embodiment 3

[0049] A self-repairing wear-resistant coating, the preparation method comprising the following steps: weighing 100 parts of polyvinyl acetal modified phenolic resin, 10 parts of calcium naphthenate, 20 parts of methyltrimethoxysilane, latent curing Mix 15 parts of agent and 50 parts of solvent evenly, add 30 parts of self-repairing microcapsules, 8 parts of film-forming agent, and 2 parts of defoamer to it, and stir evenly to obtain self-repairing wear-resistant coating;

[0050] Self-healing microcapsules are prepared by the following steps:

[0051] (1) Dissolve ethyl cellulose and dibutyltin dilaurate in deionized water, heat to 70°C, and stir evenly to obtain an ethyl cellulose solution;

[0052] Wherein, the mass ratio of ethyl cellulose, dibutyltin dilaurate, and deionized water is 1.5:3:5.

[0053] (2) mix polyvinyl acetal modified phenolic resin and emulsifier evenly to obtain emulsion;

[0054] (3) Add the emulsified solution dropwise into the ethyl cellulose solutio...

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Abstract

The invention provides a self-repairing wear-resistant coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 50 to 100 parts of modified phenolic resin, 10 to 20 parts of calcium naphthenate, 10 to 20 parts of methyltrimethoxysilane, 15 to 30 parts of self-repairing microcapsules and 8 to 15 parts of latent curing agent, the self-repairing microcapsule comprises a capsule core and a capsule wall; the capsule core comprises a catalyst and ethyl cellulose; the capsule wall is made of modified phenolic resin. When the coating is coated to form a coating, the coating has excellent wear resistance and stable self-repairing characteristic, the coating has high adhesive force with a pasted object, and in addition, the coating also has good mechanical strength and excellent water resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a self-repairing wear-resistant coating and a preparation method thereof. Background technique [0002] With the increasing development of science and technology, coating protection is currently a widely used protection method in aerospace, automobile manufacturing, petroleum and petrochemical, construction facilities and other fields. However, coatings will inevitably be cracked or damaged by external impact or natural factors during construction or use. Among the many forms of damage, micro-damage is the most common and most easily overlooked by people. , It is very easy to cause irreparable losses in people's production and life. [0003] Self-healing coatings refer to a type of liquid or solid material that can form a thin film on the surface of an object under certain conditions for protection, decoration or other special functions (such as heat resistance, wear resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/14C09D7/63C09D7/65
CPCC09D161/14C09D7/63C09D7/65C09D7/70C08L2205/025C08L61/14C08L1/28C08K5/57C08K5/098C08K5/5419
Inventor 周伟建戴海雄黄理荣林蛟周波马庆磊张旭
Owner GUANGDONG MAYDOS BUILDING MATERIALS LTD CO
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