RADIATION-CURABLE ADHESIVE SHEET

• Main Authors: FUKUTOMI SHUHEI, YAMAMOTO SHINYA, KATAMI FUSHI
• Format: Patent
• Language: English; Japanese
• Published: 13.10.2022
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; USE OF MATERIALS AS ADHESIVES

To provide a radiation-curable adhesive sheet excellent in storage stability, capable of preventing a progress of curing in storage, and capable of maintaining excellent step absorbency and stress relaxation for a long period of time.SOLUTION: A radiation-curable adhesive sheet 1 includes an adhesive layer 10 configured to cure by radiation exposure. The adhesive layer 10 includes a photoinitiator 11a and a cross-linking agent 11b. The curing by the radiation exposure is caused by a reaction by the photoinitiator 11a and the cross-linking agent 11b. In the radiation curable adhesive sheet 1, the adhesive layer 10 further includes a hindered amine-based photostabilizer 11c.SELECTED DRAWING: Figure 1 【課題】保管中の硬化の進行を抑制でき、優れた段差吸収性、応力緩和性を長時間維持でき、保存安定性に優れる放射線硬化性粘着剤シートを提供すること。【解決手段】本発明の放射線硬化性粘着剤シート１は、放射線照射により硬化する粘着剤層１０を有する。粘着剤層１０は、光重合開始剤１１ａと、架橋剤１１ｂとを含み、前記放射線照射による硬化は、光重合開始剤１１ａと、架橋剤１１ｂとの反応により硬化するものである。本発明の放射線硬化性粘着剤シート１において、粘着剤１０は、さらにヒンダードアミン系光安定剤１１ｃを含むことを特徴とする。【選択図】図１