RESIN COMPOSITION FOR REVERSE WAVELENGTH DISPERSION FILM, AND REVERSE WAVELENGTH DISPERSION FILM AND REVERSE WAVELENGTH DISPERSION SHEET WHICH COMPRISE SAME

• Main Authors: NAKASHIMA YUSUKE, MOTOFUJI SHIHEI, KURODA TAKASHI, WATANABE KAZUAKI
• Format: Patent
• Language: English; Korean
• Published: 05.03.2015
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DERIVATIVES THEREOF; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The purpose of the present invention is to provide a novel resin composition which is for use in producing a reverse wavelength dispersion film and which exhibits excellent saponification resistance, transparency, positive birefringence and reverse wavelength dispersion properties. This resin composition contains a modified polysaccharide (A) which is obtained by chemically modifying a polysaccharide to convert at least one of the hydroxyl, carboxyl and amino groups of the polysaccharide into at least one kind of functional group selected from the group consisting of ether group, urethane group, urea group, amido group and imido group. Further, the resin composition is characterized in that: the average molecular dispersion of all the monosaccharide units constituting the modified polysaccharide (A) is 0.50 to 20.0; and a film formed from the resin composition and having a thickness of 80mum exhibits an absolute value of reflection chromaticity b* of 0 to 1.0 as determined according to JIS-Z8729.