POLYCARBONATE RESIN AND OPTICAL FILM

• Main Authors: YAMANAKA, Katsuhiro, MOTOYOSHI, Tetsuya, OKADA, Youhei, ODA, Kouji
• Format: Patent
• Language: English; French; German
• Published: 27.12.2017
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; 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; 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; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; SEMICONDUCTOR DEVICES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Provided are a polycarbonate resin and an optical film formed therefrom, having wavelength dispersion characteristics close to the ideal broad bandwidth, excellent durable stability and flexibility, high retardation developability, a low photoelastic constant, and excellent melt processability, comprising: a unit (A) represented by the following formula: [wherein R 1 and R 2 each independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms optionally containing an aromatic group, or a halogen atom, and m and n each independently represent an integer of 0 to 4], a unit (B) represented by the following formula: [wherein R 3 and R 4 each independently represent a hydrogen atom, hydrocarbon group having 1 to 10 carbon atoms optionally containing an aromatic group, or a halogen atom, R 5 and R 6 each independently represent a hydrocarbon group having 1 to 10 carbon atoms optionally containing an aromatic group, s and t each independently represent an integer of 0 to 4, and p and q each independently represent an integer of 1 or more], and a carbonate unit (C) derived from an aliphatic diol compound and/or alicyclic diol compound, wherein the polycarbonate resin satisfies the following expressions (I) and (II): (I) the molar ratio of unit (A) to unit (B), (A) / (B), is 0.2 to 11.0, and (II) the molar ratio of unit (A) + unit (B) to the (A) + unit (B) + unit (C), {(A+B) / (A+B+C)}, is 0.30 to 0.60.