Retardation film

The object of the present invention is to provide a retardation film containing a norbornene copolymer which is excellent in heat resistance, low specific gravity, low birefringence, low photoelasticity, low wavelength dispersion, and has high retardant composition. It further has the high ability t...

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Bibliographische Detailangaben
Hauptverfasser:	HIRAIKE, HIROSHI, NOZATO, SHOJI, TOYOSHIMA, KATSUNORI, HATKE, WILFRIED, BRUCH, MATTHIAS, STEHLING, UDO MANFRED, SAWADA, TAKAHIKO, SCHAUWIENOLD, ANNE-MEIKE, HAJIME SERIZAWA, HIGUCHI, ISAO, YAGI, KAZUNARI, KANAI, HIROYUKI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GENERAL PROCESSES OF COMPOUNDING GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The object of the present invention is to provide a retardation film containing a norbornene copolymer which is excellent in heat resistance, low specific gravity, low birefringence, low photoelasticity, low wavelength dispersion, and has high retardant composition. It further has the high ability to compensate for retardation. The retardation film comprises a norbornene copolymer composition containing a norbornene copolymer comprising 40-60 mol% repeating units derived from at least one norbornene monomer selected from the group consisting of a monomer represented by the general formula (I), a monomer represented by the general formula (II), a monomer represented by the general formula (III), a monomer represented by the general formula (IV), and a monomer represented by the general formula (V) and 60-40 mol% repeating units derived from an acyclic olefin monomer. When the norbornene copolymer composition is formed into a film and then can be stretched2 times to form a stretched film having an in-plane bire