Self-repair coating for surfaces of flexible macromolecular base materials, method for preparing self-repair coating and application thereof

A flexible substrate and self-repairing technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of solvent resistance, polymer film surface is easy to be stained, not resistant to scratches, etc., to achieve smooth surface , to achieve the effect of solvent resistance and high transparent appearance

Inactive Publication Date: 2019-03-19
ZHEJIANG SHICHUANG OPTICAL FILM MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of the polymer film is easy to be stained, not scratch-resistant, and not resistant to solvents, so there is still a lot of room for performance improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples. For the experimental methods that do not specify specific conditions in the following examples, select according to conventional methods and conditions, or according to the product instructions.

[0026] Solvent resistance test method: Spray 1ml of xylene onto the surface of the material to be tested, and dry it with a wiping paper after 30 seconds. If there is no obvious change in the appearance of the material (such as swelling deformation, coating peeling, etc.), the solvent resistance test is considered to be qualified.

[0027] Self-healing test method: After brushing the brush marks on the surface of the film with a straight steel wire brush, observe whether the brush marks can disappear automatically or disappear under the condition of a heat source (such as hot water pouring) within 1 hour. If it disappears, the materia...

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Abstract

The invention discloses a self-repair coating for the surfaces of flexible macromolecular base materials, a method for preparing the self-repair coating and application thereof. Raw materials in a formula for the self-repair coating include, by weight, 10-25 parts of flexible polyester polyol, 4-15 parts of rigid polyester polyol, 5-16 parts of curing agents, 0.1-0.3 part of catalysts, 0.2-1 partof auxiliaries and 50-70 parts of solvents. The curing agents are trimers of diisocyanate monomers. The self-repair coating, the method and the application have the advantages that the trimers of thediisocyanate monomers are used as the curing agents for the self-repair coating, the high cross-link density can be guaranteed, accordingly, paint films have the required density and smooth surfaces,and the self-repair coating is solvent-resistant and has high-transmittance appearance; the polyester polyol with different degrees of softness is compounded, accordingly, the self-repair coating is high in cross-link density, the paint films have sufficient flexibility, and the flexibility of flexible thin films subsequently can be prevented from being destroyed.

Description

technical field [0001] The invention relates to the fields of chemical industry and film preparation, in particular to a self-repairing coating for the surface of a flexible substrate, a preparation method and application. Background technique [0002] Polymer flexible films, such as TPU films, have high optical transparency and excellent deformability, so they are widely used in the field of film sticking. However, the surface of the polymer film is easily stained and not resistant to scratches, and is not resistant to solvents, so there is still a lot of room for performance improvement. [0003] It is hoped to develop a cross-linked coating with self-healing function that can be coated on the surface of flexible polymer substrates. It has a certain cross-link density to prevent the penetration of solvents, and endows the polymer substrate with solvent resistance and stain resistance. , and can repair scratches and scratches caused by external forces automatically or un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C08G18/79C08G18/42C08J7/04
CPCC08G18/4202C08G18/79C08J7/0427C08J2375/04C08J2475/06C09D175/06
Inventor 张红生
Owner ZHEJIANG SHICHUANG OPTICAL FILM MFG
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