Photocurable optically transparent adhesive composition and adhesive sheet comprising same

Abstract

The present invention relates to a photocurable optically transparent adhesive composition comprising an aliphatic urethane acrylate, a polythiol chain transfer agent, a monofunctional ethylenic monomer, a photopolymerization initiator, and a stabilizer. Since the composition contains aliphatic urethane acrylate and polythiol chain transfer agent, it has excellent photocurability, and has excellent reliability in environmental resistance to high temperature, high temperature and high humidity, and ultraviolet rays. And even in the case of interlayer curing such as barrier rib formation, streaks do not occur, so the processability is excellent, and therefore, it is advantageous for the production of an adhesive sheet for touch panels.

Description

technical field [0001] The present invention relates to a photocurable optically transparent adhesive composition, more specifically, to the photocurable optically transparent adhesive composition of the present invention, since it contains aliphatic urethane acrylate and polythiol Since it is a chain transfer agent, it is excellent in photocurability, optical characteristics, environmental resistance, and manufacturability, and can be used as an interlayer adhesive for touch panels. Background technique [0002] Due to the development of displays and touch panels, interlayer adhesive compositions have been marketed and used at a rapid rate, and for this reason, adhesive tapes in the form of films have been used in the past. [0003] However, in the case of using an adhesive tape in the form of a film, not only the process of peeling and sticking the adhesive tape is cumbersome, but also there are many problems in process automation, and when the adhesive tape is used to bon...

AI Technical Summary

Problems solved by technology

[0005] However, even in the case of using a liquid process, various problems such as the streaking problem for recoating occur, specifically, in the case of re-forming the above-mentioned liquid material on top of a louver form or an already formed material , problems with streaking between the barrier and the reformed material, and between the material and the reformed material

[0006] In addition, in the case of materials formed by photocuring, yellowing and fogging (Haze-the phenomenon of becoming foggy like fog) will occur when exposed to high temperature, high temperature and humidity, and long-term ultraviolet radiation.

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