| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin composition having good transparency, heat-resistance, film-formability, film strength and retardation development and to provide a drawn film exhibiting a negative orientation birefringence. SOLUTION: The invention relates to a resin composition comprising an optical resin composition composed of (A) 10-100 pts.mass of a styrene-maleimide copolymer composed of 40-80 mass% styrenic monomer unit and 60-20 mass% maleimide monomer unit and (B) 90-0 pts.mass (A+B is 100 pts.mass) of a styrene-acrylonitrile copolymer composed of 65-82 mass% styrenic monomer unit and 35-18 mass% acrylonitrile monomer unit, and having a glass transition temperature of 110-150°C and a total light transmittance of≥85% measured on a 2 mm thick specimen in conformity to ASTM D1003. The invention further relates to a film made of the resin composition. COPYRIGHT: (C)2008,JPO&INPIT
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