New methacrylic resin composition

摘要

The present invention is directed to provide a methacyrlic resin composition which can suppress appearance of a silver streak(s) and can be molded at a thickness not larger than 1 mm with a good molding property (mold filling property) and a good mold releasing property. A methacrylic resin composition of the present invention is used for preparing a light guide plate having a thickness not large than 1 mm, and comprises a copolymer polymerized from monomeric components comprising methyl methacrylate and acrylic acid ester wherein a content ratio of methyl methacrylate is at least 60% by weight and a content ratio of acrylic acid ester is at most 12 % by weight, and has a reduced viscosity of 0.47-0.55 dL/g at 25°C measured as a solution at a concentration of 0.5 g/50 mL in chloroform, and MFR of at least 18 g/10 min at 230° measured under a load of 37.3 N.