| 摘要 |
PROBLEM TO BE SOLVED: To provide a polycarbonate resin optical molding material excellent in thermal stability, having high transfer precision and exhibiting excellent reliability, and an optical disk substrate therefrom. SOLUTION: The polycarbonate resin optical molding material having high transfer precision comprises a mixed resin composition comprising 60-99 wt.% of an aromatic polycarbonate resin (PC-A) obtained by using as a divalent phenolic component 2,2-bis-(4-hydroxyphenyl)propane and 1-40 mass% of an aromatic polycarbonate resin (PC-M) obtained by using as a divalent phenolic component a compound represented by formula [I] (R1-R4 are each independently a hydrogen atom or a 1-4C hydrocarbyl group), and contains not more than 10,000 pieces/g of foreign matters having a particle size of at least 0.5 μm and not more than 200 pieces/kg of foreign matters having a particle size of at least 20 μm. |
