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POLYamide-IMIDE FILM, PREPARATION METHOD THEREOF AND COVER WINDOW COMPRISING SAME

An imide film and polyamide technology, applied in the field of cover windows, can solve the problems of reduced optical properties, reduced adhesion, poor compatibility, etc., to improve quality, ensure stability and reliability, and excellent durability Effect

Pending Publication Date: 2021-01-15
爱思开迈克沃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, additives are added, but this will cause problems such as degradation of optical properties or poor compatibility
[0006] In addition, when a polyimide film is applied to a display device, the transparent cover window included in the display device includes a hard coat layer in addition to the polyimide film, which may cause an increase in haze during the formation of the hard coat layer. Decrease in optical properties such as reduction in adhesion

Method used

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  • POLYamide-IMIDE FILM, PREPARATION METHOD THEREOF AND COVER WINDOW COMPRISING SAME
  • POLYamide-IMIDE FILM, PREPARATION METHOD THEREOF AND COVER WINDOW COMPRISING SAME
  • POLYamide-IMIDE FILM, PREPARATION METHOD THEREOF AND COVER WINDOW COMPRISING SAME

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0388] Dimethylacetamide (DMAc) as an organic solvent was filled in a temperature-adjustable double-jacketed 1 L glass reactor under a nitrogen atmosphere at 20° C., based on 100 parts by weight of the following polymer solid content. 1 part by weight of metal salt (LiCl) was dissolved in the above-mentioned organic solvent. Then 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (TFMB) was slowly added and dissolved. Thereafter, 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6-FDA) was slowly added and stirred for 1 hour. Then, isophthaloyl dichloride (IPC) was added and stirred for 1 hour, and terephthaloyl dichloride (TPC) was added and stirred for 1 hour to prepare a polymer solution. After coating the obtained polymer solution on a glass plate, the dried gel sheet was peeled off from the glass plate at the temperature and time of the drying step described in Table 1. Then, after fixing the end of the gel sheet to a pin holder, hot air treatment was performed to ...

Embodiment 2a to 4a

[0390] Examples 2a to 4a and Comparative Examples 1a to 3a

[0391] As described in Table 1 below, except for changing the type of each reactant, the type, content, dissolution or non-dissolution, content, and process conditions of the metal salt, a film was produced in the same manner as in Example 1a. The content of the metal salt described in the following Table 1 is the weight part of the metal salt based on 100 parts by weight of the solid content of the polymer.

Embodiment 1b

[0393]Dimethylacetamide (DMAc) as an organic solvent was filled in a temperature-adjustable double-jacketed 1 L glass reactor under a nitrogen atmosphere at 20° C., based on 100 parts by weight of the following polymer solid content. 1 part by weight of metal salt (LiCl) was dissolved in the above-mentioned organic solvent. Then 2,2'-bis(trifluoromethyl)-4,4'-diaminobenzene (TFMB) was slowly added and dissolved. Thereafter, 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6-FDA) was slowly added and stirred for 1 hour. Then, isophthaloyl dichloride (IPC) was added and stirred for 1 hour, and terephthaloyl dichloride (TPC) was added and stirred for 1 hour to prepare a polymer solution. After coating the obtained polymer solution on a glass plate, the dried gel sheet was peeled from the glass plate at the temperature and time of the drying step described in Table 2. Then, after fixing the end of the gel sheet to a pin holder, hot air treatment was performed to manufa...

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Abstract

Embodiments relate to a polyamide-imide film that maintains its mechanical properties at least at a certain level under the conditions of high temperatures and low temperatures and is excellent in transparency and folding characteristics, a process for preparing the same, and a cover window comprising the same. The polyamide-imide film comprises a polyamide-imide polymer and has an MOR value defined in Equation 1a of 75% or more.

Description

technical field [0001] The present invention relates to a polyamide-imide film which maintains mechanical properties above a certain level even under high-temperature conditions and low-temperature conditions and is excellent in transparency and folding properties, a method for producing the same, and a cover window including the same. Background technique [0002] Polyimide resins such as poly(amide-imide) (PAI) have excellent friction resistance, heat resistance and chemical resistance, so they are used in basic electrical insulation materials, coatings, adhesives, Extrusion resins, heat-resistant coatings, heat-resistant plates, heat-resistant adhesives, heat-resistant fibers and heat-resistant films, etc. [0003] Polyimide is widely used in various fields. For example, polyimide is made in powder form and is used as a coating agent for metal or magnet wire, etc., and can be mixed with other additives according to its use. In addition, polyimides are used with fluoropo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08J5/18C08G73/10G02F1/1337
CPCC08J5/18C08G73/1067C08G73/1039C08G73/1007C08G73/1042G02F1/133723C08J2379/08C08G73/14C08L2203/16C08K3/16C08L79/08C08K3/26C08K2003/262C08K3/105
Inventor 金汉俊金善焕吴大成李辰雨崔常勋奇贞嬉林东真
Owner 爱思开迈克沃有限公司