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Adhesive composition for foldable display, and foldable display comprising same

An adhesive and composition technology, applied in the direction of film/sheet adhesive, adhesive type, ester copolymer adhesive, etc., can solve the problems of delamination and panel cracking, display device damage, etc., Achieve excellent durability

Active Publication Date: 2020-05-08
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Meanwhile, deformable display devices have the following problems: each configuration of the display device may be damaged due to deformation, and therefore, each configuration of such a display device needs to satisfy folding reliability and stability.
[0008] However, existing adhesive compositions for foldable displays have a problem in that, even when such folding reliability conditions are satisfied, they will fail when placed at -20°C, which is a condition that allows practical folding tests. most severe conditions) delamination and panel cracking during dynamic fold test

Method used

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  • Adhesive composition for foldable display, and foldable display comprising same
  • Adhesive composition for foldable display, and foldable display comprising same
  • Adhesive composition for foldable display, and foldable display comprising same

Examples

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Embodiment approach

[0110] Hereinafter, the specification will be described in detail with reference to examples. However, the embodiments according to the present specification can be modified into various other forms, and the scope of the present specification should not be construed as being limited to the embodiments described below. The examples of this specification are provided to more fully describe this specification to those of ordinary skill in the art.

[0111] In this specification, the characteristics of the adhesive composition were evaluated in the following manner.

[0112] Measurement of Storage Modulus

[0113] After coating each of the adhesive compositions prepared in Examples and Comparative Examples between release films, the resultant was cut into a size of 15 cm × 25 cm, and after removing the release film on one surface, the The resultant was laminated several times to have a thickness of about 1 mm.

[0114] Subsequently, the laminate was cut into a circular shape wi...

Embodiment 1

[0125] Into a 1 L reactor in which nitrogen gas was refluxed and equipped with a cooling device for easy temperature control, 98 parts by weight of ethyl acrylate was introduced based on 100 parts by weight of alkyl (meth)acrylate and a monomer having a crosslinkable functional group. Ethylhexyl ester (EHA) and 2 parts by weight of acrylic acid (AA). Subsequently, 150 parts by weight of ethyl acetate (EAc) was introduced thereinto as a solvent based on 100 parts by weight of alkyl (meth)acrylate and a monomer having a crosslinkable functional group, and the reactor was purged with nitrogen for 60 minutes to remove oxygen, while maintaining the temperature at 60° C., 0.02 parts by weight of azobisisobutyronitrile (AIBN) (reaction initiator) was introduced thereinto to initiate the reaction. The reaction material reacted for about 1 hour was diluted with ethyl acetate (EAc) to prepare an acrylic polymer having a molecular weight of about 2,000,000. With respect to 100 parts by ...

Embodiment 2

[0128] An adhesive layer was formed in the same manner as in Example 1, except that by introducing 59 parts by weight of ethylhexyl acrylate (EHA), 40 parts by weight of butyl acrylate (BA) and 1 part by weight of β-carboxyethyl acrylate (B-CEA) was substituted for 98 parts by weight of ethylhexyl acrylate (EHA) and 2 parts by weight of acrylic acid (AA) to prepare an acrylic polymer.

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Abstract

The present specification provides an adhesive composition for a foldable display.

Description

technical field [0001] This application claims priority and benefit from Korean Patent Application No. 10-2017-0169347 filed with the Korean Intellectual Property Office on December 11, 2017, the entire contents of which are incorporated herein by reference. [0002] The present application relates to adhesive compositions for foldable displays, and foldable displays comprising the same. Background technique [0003] With recent developments in display-related technologies, display devices that are deformable (eg, folded, rolled into a roll, or stretched like a rubber band) during a use stage have been researched and developed. These displays can be morphed into different shapes, thus meeting the need for both larger displays for use phases and smaller displays for portability. [0004] The deformable display device can be deformed into different shapes in response to user needs or according to the needs of the situation in which the display device is used, as well as into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J133/10C09J133/12C09J11/06C09J7/30C09J7/10
CPCC09J133/08C09J133/10C09J133/12C09J7/10C09J2433/00C09J2203/318G02F1/133305G02F2202/28C09J11/06C09J7/00C09J2301/312C09J7/385H05K1/18H05K5/0017H05K2201/10128B29C65/48
Inventor 朴现圭宋喜李玹燮权润京
Owner LG CHEM LTD