Polymer for retardation film, retardation film and method for producing the same and use thereof

• Main Authors: MIYAUCHI, SHINSUKE, OTA, YOSHIYA, MASUDA, NAGAYOSHI, OKIMI, KATSUHIDE, KAMEI, SHINICHI
• Format: Patent
• Language: Chinese; English
• Published: 21.07.2023
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; PHYSICS; POLISHES; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Provided is a retardation film containing a polyester resin which contains, as polymerization components: diol (A) containing fluorenediol (A1) represented by formula (1); and a dicarboxylic acid component (B) containing an alicyclic dicarboxylic acid (B1) having at least 60 mol% of a trans isomer (in the formula, Z1 and Z2 represent identical or different aromatic hydrocarbon rings, R1 and R2 represent identical or different substituents, A1 and A2 represent identical or different alkylene groups, R3 represents a substituent, m1 and m2 are the same or different and represent an integer of 0 or more, n1 and n2 are the same or different and represent an integer of 0 or 1 or more, and k represents an integer of 0-8). The obtained retardation film can achieve both reverse wavelength dispersion properties and thinning of the film.