POLYCARBONATE RESIN AND OPTICAL FILM

To provide a polycarbonate resin having wavelength dispersion characteristics close to an ideal wide range, high retardation developability, low photoelasticity and excellent melt processability, and an optical film made of the resin.SOLUTION: The polycarbonate resin comprises a carbonate unit (A) d...

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Bibliographische Detailangaben
Hauptverfasser:	MOTOYOSHI TETSUYA, YAMANAKA KATSUHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADVERTISING AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON CRYPTOGRAPHY 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 DISPLAY DISPLAYING EDUCATION ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING GENERAL PROCESSES OF COMPOUNDING LABELS OR NAME-PLATES MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS SEALS SEMICONDUCTOR DEVICES SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	To provide a polycarbonate resin having wavelength dispersion characteristics close to an ideal wide range, high retardation developability, low photoelasticity and excellent melt processability, and an optical film made of the resin.SOLUTION: The polycarbonate resin comprises a carbonate unit (A) derived from 6,6'-dihydroxy-3,3,3',3'-tetramethyl-1,1'-spirobiindane and a carbonate unit (B) derived from isosorbide, in which a molar ratio (A/B) of the unit (A) to the unit (B) is 5/95 to 95/5, and the resin shows a relative viscosity of 0.20 to 0.45 measured in a methylene chloride solution at 20°C.SELECTED DRAWING: None 【課題】理想的な広帯域に近い波長分散特性をもち、位相差発現性が高く、光弾性が低く、溶融加工性に優れたポリカーボネート樹脂およびそれからなる光学フィルムを提供する。【解決手段】６，６´−ジヒドロキシ−３，３，３´，３´−テトラメチル−１，１´−スピロビインダンから誘導されるカーボネート単位（Ａ）と、イソソルビドから誘導されるカーボネート単位（Ｂ）を含み、単位（Ａ）と単位（Ｂ）とのモル比（Ａ／Ｂ）が５／９５〜９５／５であり、２０℃の塩化メチレン溶液で測定された比粘度が０．２０〜０．４５であるポリカーボネート樹脂。【選択図】なし