RESIN AND ADHESIVE COMPOSITION

• Main Authors: ASAZU YUJI, KUNIMI NOBUTAKA, OZAWA SHOICHI
• Format: Patent
• Language: English; Japanese
• Published: 20.02.2020
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; ADVERTISING; CHEMISTRY; COMPOSITIONS BASED THEREON; CRYPTOGRAPHY; DISPLAY; DISPLAYING; DYES; EDUCATION; LABELS OR NAME-PLATES; LAKES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; PHYSICS; POLISHES; SEALS; SIGNS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

To provide a resin that can suppress photo-degradation of an organic EL light emitting element and a liquid crystal retardation film, an adhesive composition containing the resin, an adhesive layer formed from the adhesive composition, and an optical laminate in which the adhesive layers are laminated.SOLUTION: The present invention provides a resin (A) containing a structural unit having an indole structure. The resin (A) is a resin containing a structural unit having an indole structure in a side chain, preferably; and it has a glass transition temperature of 40°C or less, preferably. The resin (A) is a resin satisfying formula (1), preferably. ε(405)≥0.02 (1) [In formula (1), ε(405) is a gram extinction coefficient of the resin (A) at wavelength 405 nm. The gram extinction coefficient is expressed in a unit of L/(g cm)].SELECTED DRAWING: None 【課題】有機ＥＬ発光素子及び液晶系位相差フィルムの光劣化を抑制することができる樹脂、該樹脂を含む粘着剤組成物、該粘着剤組成物から形成される粘着剤層及び該粘着剤層を積層した光学積層体を提供する。【解決手段】インドール構造を有する構造単位を含有する樹脂（Ａ）。樹脂（Ａ）は側鎖にインドール構造を有する構造単位を含有する樹脂であることが好ましく、ガラス転移温度が４０℃以下であることが好ましい。また、樹脂（Ａ）は式（１）を満たす樹脂であることが好ましい。ε（４０５）≧ ０．０２ （１）［式（１）中、ε（４０５）は波長４０５ｎｍにおける樹脂（Ａ）のグラム吸光係数を表す。グラム吸光係数の単位はＬ／（ｇ・ｃｍ）である。］【選択図】なし