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Self-repairing water-based polymer composite coating agent, and preparation method and application thereof

A water-based polymer, self-healing 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: 2020-08-18
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Self-repairing water-based polymer composite coating agent, and preparation method and application thereof
  • Self-repairing water-based polymer composite coating agent, and preparation method and application thereof

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preparation example Construction

[0033] The invention discloses a preparation method of a self-repairing water-based polymer composite coating agent, the process steps of which are as follows:

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

[0035] First, take 0.1-10 parts of phenylboronic acid and disperse them in 20-90 parts of alcohol solution, then take 0.5-50 parts of compounds with primary amino groups and disperse them in 20-90 parts of deionized water. Next, under mechanical stirring, the above two solutions were mixed, and stirred and reacted at 20-100° C. for 4-6 hours. Next, place the above mixed solution in an ice-water bath and slowly add 0.1 to 1 part of NaBH 4 , Continue to react for 2-3 hours. After completion of the reaction, the alcohol solution was removed by distillation to obtain a boronic acid bond-containing compound (A). Finally, drying treatment is carried out, and A is gradually dehydrated and trimerized and cross-linked to form a nitrogen-con...

Embodiment 1

[0051] (1) First, take 0.1 part of 2-bromomethylphenylboronic acid and disperse it in 20 parts of methanol, 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 stirred and reacted at 30° C. for 4 h. Next, place the above mixture in an ice-water bath and slowly add 0.1 parts of NaBH 4 , continue to react for 2h. After completion of the reaction, methanol was distilled off to obtain a compound (A) containing a boronic acid bond. Finally, drying treatment is carried out, and A is gradually dehydrated and trimerized and cross-linked to form a compound (B) containing a nitrogen-coordinated borate bond.

[0052] (2) Weigh 60 parts of WPU (solid content: 50%) and place on a magnetic stirrer. Then take 1.5 parts of B, disperse it in 5 parts of ethanol, add it dropwise to WPU under the condition of stirring, continue stirring for 1 hour after the...

Embodiment 2

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

[0056] (2) Weigh 90 parts of WPU (solid content: 60%) and place on a magnetic stirrer. Then take 3.78 parts of B, disperse it in 10 parts of ethanol, add it dropwise to WPU under the condition of stirring, continue stirring for 1 hour after dropping, and obta...

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Abstract

The invention discloses a self-repairing water-based polymer composite coating, and a preparation method and application thereof, and belongs to the technical field of coating agent production. The preparation method comprises the following steps of: (1) reacting phenylboronic acid, a primary amine compound and NaBH4 to obtain a compound containing a boric acid bond, and performing dehydration, trimerizing and crosslinking to obtain a nitrogen coordination-containing boric acid ester bond compound; and (2) blending and compounding the nitrogen coordination-containing boric acid ester bond compound and a water-based polymer to obtain the self-repairing water-based polymer composite finishing agent. The preparation method disclosed by the invention has the advantages of simple and easily-controlled process, low cost, wide application range and the like, and is suitable for industrial production. The self-repairing water-based polymer composite coating agent prepared by the preparation method has a boron-oxygen six-membered ring and hydrogen bond dual self-repairing structure, can be quickly and efficiently self-repaired in an aqueous medium at room temperature, has the characteristics of good stability, excellent mechanical properties, obvious repairing effect and the like, and can be applied to various room-temperature self-repairing coatings.

Description

technical field [0001] The invention belongs to the technical field of finishing agent production, and in particular relates to a self-repairing water-based polymer composite finishing agent and its preparation method and application. Background technique [0002] Waterborne 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, good film-forming properties, etc., and are widely used in rubber, fiber, 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 waste of materials. . Although there are ...

Claims

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Application Information

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Patent Type & Authority Applications(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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