PRESSURE-SENSITIVE ADHESIVE LAYER FOR OPTICAL FILM, METHOD OF PRODUCING THE SAME, PRESSURE-SENSITIVE ADHESIVE-TYPE OPTICAL FILM, AND IMAGE DISPLAY DEVICE

• Main Authors: SUGINO SHOKO, FUJITA MASAKUNI, SATAKE MASAYUKI, FUJIWARA ARATA
• Format: Patent
• Language: English; Japanese
• Published: 09.04.2015
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PAINTS; PERFORMING OPERATIONS; PHYSICS; POLISHES; TRANSPORTING; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive layer for an optical film, capable of satisfying display uniformity, durability, and transparency, and to provide a method of producing the same.SOLUTION: The pressure-sensitive adhesive layer for an optical film is laminated on at least one surface of an optical film. The pressure-sensitive adhesive layer for an optical film is formed of a pressure-sensitive adhesive containing, based on 100 pts.wt. of an acrylic polymer (A), 8-30 pts.wt. of an isocyanate-type crosslinking agent (B) and 0.01-5 pts.wt. of a silane coupling agent (C) and has a haze value of 1% or less as measured at 25 μm thickness. 【課題】表示均一性、耐久性及び透明性を満足することができる光学フィルム用粘着剤層およびその製造方法を提供すること。【解決手段】光学フィルムの少なくとも片面に積層される光学フィルム用粘着剤層であって、当該光学フィルム用粘着剤層は、アクリル系ポリマー（Ａ）１００重量部に対して、イソシアネート系架橋剤（Ｂ）が８〜３０重量部、シランカップリング剤（Ｃ）が０．０１〜５重量部を含有する粘着剤により形成されており、かつ、厚さ２５μｍで測定したヘイズ値が１％以下である。【選択図】なし