| abstract |
It is an object of the present invention to provide a methacrylic resin composition having a sufficient optical property for practical use and excellent in heat resistance, thermal stability and molding processability and a molded article containing the same. The methacrylic resin composition of the present invention comprises 50 to 97% by mass of a methacrylic acid ester monomer unit (A), 3 to 30% by mass of a structural unit (B) having a ring structure in its main chain, 0 to 20 mass% of other vinyl-based monomer units (C) copolymerizable with the monomers, wherein the methacrylic resin satisfies specific conditions and is heated in a nitrogen atmosphere at 280 占 폚 for 1 hour to have a weight average molecular weight The residual ratio is 80% or more, and the weight average molecular weight remaining ratio when heated in air at 280 DEG C for 0.5 hour is 80% or more. |