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Self-repairing film

A self-healing and self-selecting technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor wear resistance of plastic films, irreversible recovery or repair, etc., and achieve high scratch resistance, high hardness, Effects of low shrinkage stress deformation and formability

Inactive Publication Date: 2017-02-22
YILIKIM NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the problems of poor wear resistance and irreversible recovery or repair of plastic films in the prior art, and to provide a plastic film with high hardness and excellent tensile formability, self-repairability, and oil resistance. Self-healing membrane with high performance and solvent resistance

Method used

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  • Self-repairing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 100 parts of polycaprolactone trihydric alcohol (Daicel Chemical PLACCEL 308), 60 parts of trimer of hexamethylene diisocyanate, 4 parts of leveling agent BYK-370 (Byke Chemicals), 48 parts of ethyl acetate , 68 parts of butyl acetate and 48 parts of propylene glycol methyl ether acetate were stirred and mixed evenly at high speed. Before coating, add 0.15 parts of triethylenediamine and stir at high speed for 0.5h to mix well.

[0022] The transparent carrier layer was selected as a polyethylene terephthalate 100 μm base film (Yihua Toray Polyester Film Co., Ltd., PY-2Z), and the self-healing functional layer components were coated on the transparent substrate by slit coating. The carrier layer has a dry film thickness of 40 μm and is dried and cured for 3 minutes using a stepwise heating method of 70°C / 90°C / 130°C / 140°C / 110°C. After curing for 24 hours in a curing room at ℃, a self-healing film was obtained.

Embodiment 2

[0024] 100 parts of polyester polyol (Zhongshan Jieshida PU301), 80 parts of trimer of hexamethylene diisocyanate, 4 parts of leveling agent DSP637 (Zhongshan Jieshida), 54 parts of methyl ethyl ketone, 72 parts of butyl acetate Stir and mix evenly with 54 parts of propylene glycol methyl ether at high speed. Before coating, add 0.10 parts of tetramethylguanidine and stir at high speed for 0.5 h to mix well.

[0025] The transparent carrier layer is selected as a polycarbonate 125 μm base film (Saudi Basic Industries Corporation), and the self-healing functional layer components are coated on the transparent carrier layer by a slit coating method so that the dry film thickness is 50 μm and the temperature is raised in steps at 70°C / 90°C / 130°C / 140°C / 110°C was dried and cured for 3 minutes, then the self-healing functional layer was coated with a fluorine release film and rolled up, and finally placed in a 50°C curing room and cured for 24 hours to obtain a self-healing film. ...

Embodiment 3

[0027] Mix 100 parts of acrylic polyol (Asia Industry TRE-2-S2), 42 parts of isocyanate-containing oligomer X-06 (Asia Industry), 2 parts of leveling agent BYK-371, 33 parts of ethyl acetate, 16 parts Butyl acetate and 33 parts of propylene glycol methyl ether were stirred and mixed evenly at high speed. Before coating, add 0.07 part of potassium isooctanoate and stir for 0.5 h to mix well.

[0028] The transparent carrier layer was selected as a polyethylene terephthalate 125 μm base film (Yihua Toray Polyester Film Co., Ltd., PY-2Z), and the self-healing functional layer components were coated on the transparent substrate by slit coating. The carrier layer has a dry film thickness of 25 μm and is dried and cured for 3 minutes using a stepwise heating method of 70°C / 90°C / 130°C / 130°C / 110°C. After curing for 24 hours in a curing room at ℃, a self-healing film was obtained.

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Abstract

The invention relates to a self-repairing film which comprises a transparent carrier layer and a self-repairing function layer coating the transparent carrier layer. The self-repairing function layer is prepared by thermocuring, by weight, 100 parts of polyhydric alcohols, 40-80 parts of isocyanate, 0.05-0.2 part of a catalyst, 0.5-4 parts of a flatting agent and 52-180 parts of a solvent. The self-repairing film has the high hardness and excellent drawing molding performance, self-repairability, oil stain resistance and solvent resistance, and can be applied to the field of in-mold decoration(IMD), the field of 3C product screen protection and the like.

Description

technical field [0001] The invention belongs to the technical field of functional films and relates to a self-repairing film. Background technique [0002] Due to the properties of optical transparency, dimensional stability, mechanical properties, low cost, light weight and easy molding and processing, plastic films are widely used in the field of in-mold decoration (IMD) of home appliances, 3C products, automobiles and medical equipment, etc. 3C product screen protection and automotive paint protection and other material surface protection fields. However, the wear resistance and surface hardness of the plastic film are not high, and the surface of the film is easily scratched after long-term use, which affects properties such as optical transparency and decoration. In order to solve the poor wear resistance of the plastic film, the surface hardening treatment of the plastic film is mainly used at this stage, and a layer of hardened layer is mainly wet coated. [0003] T...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/62C09D175/06C09D175/04C08J7/04
CPCC08G18/42C08G18/4277C08G18/6216C08J7/0427C08J2367/02C08J2369/00C08J2375/04C08J2475/04C08J2475/06C09D175/04C09D175/06
Inventor 向一民刘新叶电张杰海王欢
Owner YILIKIM NEW MATERIALS CO LTD
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