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Adhesive composition, adhesive sheet, and touch panel

A touch panel and adhesive technology, applied in the direction of adhesives, adhesive methods, adhesive types, etc., can solve the problems of reduced heat resistance of adhesives, panel bending, warping or curling, etc., to achieve good wetting sexual effect

Active Publication Date: 2013-01-30
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, since the adhesive disclosed in the above-mentioned document has greatly reduced heat resistance, when it is used in a high-temperature process above about 100° C., air pockets or air bubbles are easily generated between the adhesive and the adherend, or the panel is prone to occur. Problems with bending, warping or curling (curl), etc.

Method used

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  • Adhesive composition, adhesive sheet, and touch panel
  • Adhesive composition, adhesive sheet, and touch panel
  • Adhesive composition, adhesive sheet, and touch panel

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0088] Preparation example 1. Preparation of acrylic resin (A)

[0089] 65 parts by weight of butyl acrylate (BA), 25 parts by weight of methyl acrylate (MA), and 10 parts by weight of acrylic acid (AA) were charged into a 1 L reactor that refluxed nitrogen gas and provided a cooling device for easy temperature adjustment. After the monomer mixture, 100 parts by weight of ethyl acetate (EAc) was added as a solvent. Next, nitrogen was purged for one hour to remove oxygen, and after uniformly mixing the mixture while maintaining a temperature of 62° C., 0.03 parts by weight of azobisisobutyronitrile (AIBN) diluted to 50% concentration in ethyl acetate was added as a reaction initiation agent. Next, the above-mentioned mixture was reacted for 8 hours to prepare an acrylic resin (A) having a weight average molecular weight of 1,200,000.

preparation example 2

[0090] Preparation example 2. Preparation of acrylic resin (B)

[0091] The acrylic resin (B) with a weight average molecular weight of 1.5 million was prepared by using the same monomer components as those in Preparation Example 1, and properly adjusting the reaction conditions such as the content of the reaction initiator.

preparation example 3

[0092] Preparation example 3. Preparation of acrylic resin (C)

[0093] The acrylic resin (C) with a weight average molecular weight of 700,000 was prepared by using the same monomer components as those in Preparation Example 1, and properly adjusting the reaction conditions such as the content of the reaction initiator.

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Abstract

The present invention relates to an adhesive composition, to an adhesive sheet, and to a touch panel. The present invention provides an adhesive composition, particularly an adhesive composition for a touch panel, which is prepared without using a low molecular weight polymer as an additive. The adhesive composition, the adhesive sheet, and the touch panel of the present invention exhibit superior heat resistance in a hardening process, a printed circuit board assembly process, or the like, and have superior physical properties such as optical characteristics, wettability, cuttability, workability, anti-curling properties, and durability.

Description

technical field [0001] The invention relates to an adhesive composition, an adhesive sheet and a touch panel. Background technique [0002] Recently, mobile terminals such as mobile phones and PHS (Personal Handyphone) terminals, and mobile communication terminals such as PDA (Pocket Computer) terminals are forming a huge market. The technical goals pursued by mobile communication terminals include thinning, light weight, power saving, high resolution, and high brightness. [0003] In particular, a terminal equipped with a touch panel or a touch screen as an input device adopts a structure in which a transparent conductive plastic film such as polyethylene terephthalate ( PET) film is used as a substrate, and a film having a conductive thin film such as Indium Tin Oxide (ITO) formed on one side thereof is laminated on conductive glass, reinforcing material, decorative film, etc. through an adhesive layer. [0004] In a touch screen or touch panel, the adhesive used to atta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J9/00C09J133/04C09J5/00G06F3/041
CPCC09J133/08G06F2203/04103G06F3/041G06F3/045Y10T428/2852Y10T428/264Y10T428/1476
Inventor 金章淳李勇勋李亿炯韩鹤林崔源九宋玟锡
Owner LG CHEM LTD
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