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A kind of self-healing water-based polymer composite finishing agent and preparation method and application thereof

A water-based polymer and finishing agent technology, applied in polyamide coatings, chemical instruments and methods, polyurea/polyurethane coatings, etc., can solve the problems of irritation, unfavorable practical application, poor mechanical strength of materials, etc. Large-scale production and use, low cost effect

Active Publication Date: 2022-07-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the material with self-healing function has poor mechanical strength and requires external stimulation, which is not conducive to practical application.

Method used

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  • A kind of self-healing water-based polymer composite finishing agent and preparation method and application thereof
  • A kind of self-healing water-based polymer composite finishing agent and preparation method and application thereof

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preparation example Construction

[0033] The invention discloses a preparation method of a self-healing water-based polymer composite finishing agent. The process steps are as follows:

[0034] 1) Preparation of nitrogen-containing coordination boronic ester bond compound (B)

[0035] First, take 0.1-10 parts of phenylboronic acid and disperse in 20-90 parts of alcohol solution, and then take 0.5-50 parts of compounds with primary amine groups and disperse them in 20-90 parts of deionized water. Next, under mechanical stirring, the above two solutions are mixed, and the reaction is stirred at 20 to 100° C. for 4 to 6 hours. Next, the above mixture was placed in an ice-water bath and 0.1-1 part of NaBH was slowly added dropwise 4 , and continue to react for 2 to 3 hours. After completion of the reaction, the alcohol solution was distilled off to obtain a boronic acid bond-containing compound (A). Finally, a drying treatment is performed, A is gradually dehydrated and trimerized and cross-linked to form a nit...

Embodiment 1

[0051] (1) First, take 0.1 part of 2-bromomethylphenylboronic acid and disperse it in 20 parts of methanol, and then take 0.5 part of poly(propylene glycol) bis(2-aminopropyl ether) and disperse it in 20 parts of deionized water. Next, under mechanical stirring, the above two solutions were mixed, and the reaction was stirred at 30 °C for 4 h. Next, the above mixture was placed in an ice-water bath and 0.1 part of NaBH was slowly added dropwise 4 , continue to react for 2h. After completion of the reaction, methanol was distilled off to obtain a boronic acid bond-containing compound (A). Finally, a drying treatment is performed, A is gradually dehydrated and trimerized and cross-linked into a compound (B) containing a nitrogen-coordinated boronate bond.

[0052] (2) 60 parts of WPU (solid content of 50%) were weighed and placed on a magnetic stirrer. Then take 1.5 parts of B, disperse it in 5 parts of ethanol, add it dropwise to WPU under stirring conditions, and continue s...

Embodiment 2

[0055] (1) First, take 3 parts of 2-bromomethylphenylboronic acid and disperse in 30 parts of methanol, then take 15 parts of hexamethylenediamine and disperse in 30 parts of deionized water. Next, under mechanical stirring, the above two solutions were mixed, and the reaction was stirred at 20 °C for 4 h. Next, the above mixture was placed in an ice-water bath and 0.3 part of NaBH was slowly added dropwise 4 , continue to react for 3h. After completion of the reaction, methanol was distilled off to obtain a boronic acid bond-containing compound (A). Finally, a drying treatment is performed, A is gradually dehydrated and trimerized and cross-linked into a compound (B) containing a nitrogen-coordinated boronate bond.

[0056] (2) 90 parts of WPU (solid content of 60%) were weighed and placed on a magnetic stirrer. Then take 3.78 parts of B, disperse it in 10 parts of ethanol, add it dropwise to WPU under stirring conditions, and continue stirring for 1h after the dropwise ad...

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Abstract

The invention discloses a self-repairing water-based polymer composite finishing agent, a preparation method and application thereof, and belongs to the technical field of finishing agent production. The preparation method comprises: (1) passing through phenylboronic acid, primary amine compounds and NaBH 4 reaction to obtain a compound containing a boronic acid bond, which is then dehydrated and trimerized and cross-linked to form a nitrogen-containing coordination boronate bond compound; (2) the nitrogen-containing coordination boronate bond compound is blended and compounded with an aqueous polymer to obtain Self-healing water-based polymer composite finishing agent. The preparation method of the invention has the advantages of simple and easy-to-control process, low cost, wide application range and the like, and is suitable for industrial production. The self-healing water-based polymer composite coating agent prepared by the preparation method has a double self-repairing structure of boron-oxygen six-membered ring and hydrogen bond, can self-repair quickly and efficiently in an aqueous medium at room temperature, and has good stability, mechanical properties and mechanical properties. It has the characteristics of excellent performance and obvious repair effect, and can be applied to various room temperature self-healing coatings.

Description

technical field [0001] The invention belongs to the technical field of finishing agent production, and in particular relates to a self-healing water-based polymer composite finishing agent and a preparation method and application thereof. Background technique [0002] Water-based polymers are a new class of polymers that use water as a dispersion medium to replace traditional organic solvents, which greatly reduces toxicity. Moreover, water-based polymers also have many excellent properties, such as good elasticity, easy processing, strong adhesion, and good film-forming properties, and are widely used in rubber, fibers, coatings, synthetic leather, plastics, adhesives and other fields. However, due to the poor wear resistance and low strength of water-based polymers, the materials will be damaged by some external factors in daily life and industrial applications. These damages will affect the normal use of the materials and also cause material waste. . Although there are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D133/04C09D133/26C09D179/08C09D177/00C09D7/63C07F5/05
CPCC09D175/04C09D133/04C09D133/26C09D179/08C09D177/00C09D7/63C07F5/05C08K5/55
Inventor 刘超殷青郝丽芬鲍艳林阳李茜
Owner SHAANXI UNIV OF SCI & TECH
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