A kind of room temperature self-healing coating and preparation method thereof

A self-healing, room temperature technology

Active Publication Date: 2021-08-10
韶关长悦高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) The repair process takes a certain amount of time under no-load conditions
(5) There is also a need for testing methods for damage causes and activation methods for initiating repairs
[0004] Most of the coatings currently used cannot be repaired after defects are generated, and some coating materials can be repaired, but the repair process requires additional healing agents or energy (such as heating, light, pressure, etc.) input or the number of repairs is limited etc., which greatly limits the actual usage requirements
In addition, there are few reports of materials that can spontaneously self-heal at room temperature (without the need for additional healing agents or energy). Partial self-healing is also conditioned on the compromise of mechanical properties, and it is accompanied by high preparation costs and complex synthesis processes. And other issues

Method used

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  • A kind of room temperature self-healing coating and preparation method thereof
  • A kind of room temperature self-healing coating and preparation method thereof
  • A kind of room temperature self-healing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A room temperature self-healing coating, comprising the following raw materials in parts by weight:

[0055] 60 parts of self-healing polythiourethane matrix;

[0056] 25 parts of photocurable resins composed of bisphenol A epoxy diacrylate and aliphatic polyurethane triacrylate in a mass ratio of 3:2;

[0057] 10 parts of photocurable monomer diluents composed of trimethylolpropane triacrylate, tripropylene glycol diacrylate, and butyl acrylate in a mass ratio of 4:3:3;

[0058] 5 parts of photoinitiator BP.

specific Embodiment 2-6

[0059] Specific embodiment 2-6, other are with specific embodiment 1, difference is following table:

[0060]

[0061]

[0062] The self-healing polythiourethane used in the above-mentioned embodiments 1-6 is prepared by the following method:

[0063] (1) 1 part of one-end hydrogen-containing siloxane was dissolved in 50 parts of tetrahydrofuran, 1.1 parts of glycidyl methacrylate, 1 wt% of hydroquinone, 10 -5 10 parts of chloroplatinic acid, dissolved in 10 parts of tetrahydrofuran and added to the constant pressure dropping funnel, the dropping speed was controlled, stirred, and reacted at 60°C for 5 hours, the solvent was distilled off under reduced pressure, and 30 parts of toluene, excess sodium bicarbonate and 10 parts of Deionized water, stirred at 60°C for 3h, separated the water phase, took the organic layer, and distilled off the solvent under reduced pressure to obtain a siloxane-modified epoxy monomer (IR: 1642cm -1 : C=C disappeared; 1718cm -1 : C=O exists...

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Abstract

The invention belongs to the field of coatings, and specifically relates to a room temperature self-repairing coating and a preparation method thereof. The coating material includes the following raw materials in parts by weight: 60-80 parts of self-repairing polythiourethane resin matrix, 15-25 parts of photocurable resin 10-20 parts of photocurable monomer diluent, 2-5 parts of photoinitiator. The coating material of the present invention effectively improves the defects of existing self-healing coatings such as low self-healing rate, limited number of repairs, and the use of external energy or healing agents, and has the characteristics of anti-fouling, abrasion resistance, and impact resistance. Good overall performance advantages.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a room-temperature self-repairing coating and a preparation method thereof. Background technique [0002] With the increasing development of science and technology, coating protection is a corrosion protection method widely used in aerospace, automobile manufacturing, petroleum and petrochemical, construction facilities and other fields. However, as a coating, it will inevitably be cracked and damaged due to natural and human factors during use. Due to various conditions, it is difficult for people to find that the coating has been damaged in time and repair it in time. Repair, which not only affects the appearance, but also increases the cost of maintenance. One way to solve this problem is to develop coating materials that can self-heal. [0003] Self-healing paint is a name that can be called a smart paint that was proposed in the 1990s. It often refers to organic polyme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D163/10C09D175/14C09D191/00C09D5/16
CPCC08L2205/025C08L2205/03C09D5/1662C09D175/04C08L63/10C08L75/14C08L91/00
Inventor 汤杰
Owner 韶关长悦高分子材料有限公司
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