| abstract |
An object of the present invention is to provide an optical styrene resin composition, a molded article, and a light guide plate which are excellent in long term thermal stability, have small changes in color and transmittance, and are excellent in colorless transparency. According to the present invention, a styrene resin comprising (a) a styrene resin having a weight average molecular weight of 150,000 to 700,000, a (b) phosphorus antioxidant of a specific structure, and (c) a hindered phenolic antioxidant of a specific structure As a composition, content of (b) is 0.03-0.40 mass% and (c) is 0.02-0.30 mass% in 100 mass% of styrene resin compositions, The optical styrene resin composition is provided. |