LAMINATE OPTICAL FILM, AND PHASE DIFFERENCE COMPENSATION PLATE INCLUDING LAMINATE OPTICAL FILM

• Main Authors: KAKEYA FUMIAKI, KOMURO KOJI
• Format: Patent
• Language: English; Japanese
• Published: 28.02.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

To provide a laminate optical film in which Rth as retardation in a thickness direction is adjusted to an appropriate range, a change in retardation because of a wavelength is small, or retardation in a wavelength is small, and to provide a phase difference compensation plate having such a laminate optical film.SOLUTION: Problems are solved by a laminate optical film that includes a base material film layer (A) including a resin composition containing resin A having a positive intrinsic birefringence value and resin B having a negative intrinsic birefringence value, and a layer (B) including a phenol-modified aromatic hydrocarbon formaldehyde resin, and has Rth ranging from -30 to +80 nm.SELECTED DRAWING: None 【課題】厚み方向のレターデーションであるＲｔｈを適切な範囲に調整されていて、波長によるレターデーションの変化が小さい、または低波長におけるレターデーションが小さい積層光学フィルム、及び、そのような積層光学フィルムを有する位相差補償板を提供することにある。【解決手段】上記課題は、固有複屈折値が正の樹脂Ａと、固有複屈折値が負の樹脂Ｂとを含有する樹脂組成物を含む基材フィルム層（Ａ）と、フェノール類変性芳香族炭化水素ホルムアルデヒド樹脂を含む層（Ｂ）とを含み、Ｒｔｈが−３０〜＋８０ｎｍである積層光学フィルムにより、解決された。【選択図】 なし