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Hard coating film and flexible display having the same

A technology of hard coating film and hard coating, which is applied to devices, coatings, instruments and other directions for coating liquid on the surface, which can solve the problem of lack of flexibility of flexible displays, and achieve excellent bending resistance, excellent impact resistance and curling resistance. Effect

Active Publication Date: 2017-11-28
DONGWOO FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, such a hard coating film has a problem of not having sufficient flexibility suitable for flexible displays, so it is desired to develop a hard coating film having excellent flexibility and curlability and excellent impact resistance

Method used

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  • Hard coating film and flexible display having the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0068] Preparation Example 1: Preparation of the first hard coating composition

[0069] Using a stirrer, 60 wt% of urethane acrylate oligomer (elongation: 70%, UF-8001G from Kyoeisha Chemical Co., Ltd.), 37 wt% of methyl ethyl ketone, 2.5 wt% of Photoinitiator (1-hydroxycyclohexyl phenyl ketone) and 0.5wt% leveling agent (BYK-3570 from BYK Chemical Company) were mixed, and then filtered with a polypropylene (PP) filter to prepare First hardcoat composition.

preparation example 2

[0070] Preparation Example 2: Preparation of the second hard coating composition

[0071] Using a stirrer, 37 wt% of methyl ethyl ketone, 30 wt% of methyl ethyl ketone silica sol (MEK-AC-2140Z from Nissan Chemical Industry, particle size: 10 to 15 nm), 30 wt% of urethane acrylic acid Ester oligomer (elongation: 17%, CN989NS from Sartomer Company), 2.5wt% photoinitiator (1-hydroxycyclohexyl phenyl ketone) and 0.5wt% leveling agent (from Bi BYK-3570 from Ke Chemical Company) and then filtered through a polypropylene (PP) filter to prepare a hard coating composition.

Embodiment 1 to 3 and comparative example 1 to 4

[0072] Embodiment 1 to 3 and comparative example 1 to 4: the preparation of hard coating film

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Abstract

The present invention provides a hard coating film comprising: a substrate; a first hard coating layer formed on one surface of the substrate; and a second hard coating layer formed on the other surface of the substrate, wherein the first hard coating layer includes a cross-linked polymer of an oligomer having an elongation of 50 to 350%, the second hard coating layer includes a cross-linked polymer of an oligomer having an elongation of 0.1 to 50%, and the crosslinking density of the first hard coating layer is smaller than the crosslinking density of the second hard coating layer, and a flexible display having the hard coating film. The hard coating film according to the present invention has excellent impact resistance and curling properties and also has excellent bending resistance.

Description

technical field [0001] The invention relates to a hard coating film and a flexible display with the hard coating film. More specifically, the present invention relates to a hard coat film excellent in impact resistance and curling property and also excellent in bending resistance, and a flexible display having the hard coat film. Background technique [0002] Hardcoat films have been used to protect the surfaces of various image displays, including liquid crystal display devices (LCD), electroluminescence (EL) display devices, plasma displays (PD), field emission displays (FED), and the like. [0003] In recent years, flexible displays have attracted attention as next-generation display devices that use flexible materials such as plastics instead of conventional inflexible glass substrates to maintain display performance even when bent like paper. In this regard, there is a need for a hard coat film which not only has high hardness and good impact resistance but also has su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/14G09F9/30C09D7/61
CPCG02B1/14G09F9/301C09D7/61C08G18/672C08G18/673C08F299/065C09D5/00C08K3/22C08K3/36G02F1/133528G02F2201/50C09D4/00C09D175/16C08J7/042G02B5/30G06F3/041C08J7/046B05D3/067C08J5/18
Inventor 李升佑
Owner DONGWOO FINE CHEM CO LTD
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