| 摘要 |
PROBLEM TO BE SOLVED: To provide a molded product comprising a polycarbonate copolymer having excellent heat resistance and good appearance. SOLUTION: In this injection molding method for the polycarbonate copolymer composed of a fluorene bisphenol wherein 5-95 mol% of a wholly-aromatic dihydroxy component is represented by a specific general structural formula [e.g., 9,9-bis(4-hydroxy-3-methylphenyl)fluorene] and 95-5 mol% thereof is a hydroxy component represented by a specific general structural formula (e.g., hydroquinone), the polycarbonate copolymer is dried under a condition of 105≤Td≤Tg-10 when the glass transition temperature of the polycarbonate copolymer is Tg(°C), the drying temperature of pellets is Td(°C), the temperature of the resin in a cylinder is Tc(°C) and the temperature of a mold of Tm(°C) before molded under conditions of 381-20,900/Tg≤Tc≤485-17,000/Tg and 0.458 Tg≤Tm≤Tg-10. COPYRIGHT: (C)2005,JPO&NCIPI |
