| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a styrene-based resin composition that prevents thermal discoloration in a high-temperature heat history in molding and processing, etc., is especially suitable for optical uses of light guide plate, etc., and has excellent colorless transparency. <P>SOLUTION: The styrene-based resin composition includes (1) a styrene-based resin having a weight-average molecular weight of 150,000-700,000, a phosphite compound represented by general formula (I) (R<SB POS="POST">1</SB>and R<SB POS="POST">2</SB>may be the same or different and each 1-20C alkyl, 3-20C cycloalkyl or 6-30C aryl) and a hindered phenol-based antioxidant in which the content of the phosphite compound represented by general formula (I) is 0.02-0.40 mass%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
