Tacky-adhesive composition and tacky-adhesive film comprising cured product thereof

An adhesive film and composition technology, which is applied in the directions of film/sheet adhesives, non-polymer organic compound adhesives, adhesives, etc. Reprocessability deterioration and other problems, to achieve excellent white turbidity, high reprocessability, and minimized errors

Active Publication Date: 2020-04-17
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, there is a problem that an air gap is formed between the cover member and the display member due to the step caused by the printed layer, and thus the total thickness of the display device increases.
[0009] However, the adhesive film comprising the cured product of the adhesive composition in the related art involves a problem of change over time, in which the gel content increases over time to deteriorate adhesive properties
That is, since the adhesive properties of the adhesive film in the related art vary with time, the step formed between the cover member and the display member cannot be sufficiently embedded, so that there is a lift-off between the cover member and the display member ( lifting) phenomenon
[0010] In addition, the adhesive film in the related art has a problem that, during the process of removing the adhesive film after attaching the cover member and the display member, residue remains on the members, thus degrading the reworkability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0129] According to an exemplary embodiment of the present invention, the multilayer adhesive sheet may be formed through a lamination process after curing each of the intermediate adhesive composition and the outer adhesive composition into a film. Specifically, the multilayer adhesive sheet can be produced by separately preparing a first outer adhesive film, an intermediate adhesive film, and a second outer adhesive film in the form of films, sequentially laminating these films, and then The resulting laminate was compressed.

[0130] However, the method of producing a multilayer adhesive sheet is not limited thereto, and a multilayer adhesive sheet may be produced by using a production method generally applied in the art.

Embodiment approach

[0132] Hereinafter, the present invention will be described in detail with reference to Examples for specifically describing the present invention. However, the embodiments according to the present invention can be modified in various forms, and it should not be construed that the scope of the present invention is limited to the embodiments to be described below. The examples of this specification are provided to more fully explain the present invention to those of ordinary skill in the art.

[0133]

Embodiment 1

[0135]An adhesive composition was prepared comprising: as monomers, 75 parts by weight of 2-ethylhexyl acrylate, 10 parts by weight of isobornyl methacrylate, 10 parts by weight of acrylic acid, and 5 parts by weight of dimethyl Acrylamide; 0.2 parts by weight of photoinitiator (Irgacure 651, manufactured by Ciba Specialty Chemicals Co., Ltd.); 0.1 part by weight of curing agent (hexanediol diacrylate, HDDA) and 1 part by weight of crosslinking agent (SUO-1020, manufactured by SHIN-A T&C).

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Abstract

The present specification relates to a tacky-adhesive composition and to a tacky-adhesive film comprising a cured product thereof.

Description

technical field [0001] This specification claims priority and benefit from Korean Patent Application No. 10-2017-0136849 filed with the Korean Intellectual Property Office on October 20, 2017, the entire contents of which are incorporated herein by reference. [0002] The present invention relates to an adhesive composition and an adhesive film comprising a cured product thereof. Background technique [0003] Various optical members may be attached to the display device through an adhesive film. Even if the display device is exposed to the external environment, the adhesive film needs to maintain adhesive properties for a long time. Therefore, studies have been actively conducted to improve the adhesive properties of adhesive films. [0004] In particular, when an adhesive film is applied to a small-sized display device such as a smart display, a recent technical trend is to minimize the total thickness of the display device in response to recent consumer preference for a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J7/10
CPCC09J7/10C09J2433/00C09J4/00C08F220/1808C08F220/1811C08F220/06C08F220/54C08F220/20C09J7/00C09J2301/312
Inventor 洪在成宋镐径斯莱·李崔埈满金章淳
Owner LG CHEM LTD
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