TRANSPARENT MOLDING FOR OPTICAL DEVICE

摘要

PURPOSE:To obtain a molding having small optical strain and excellent heat resistance by molding a polycarbonate contg. 25-100wt% unit contg. >=1 suspended arom. groups and contg. 20-100wt% unit having phenol phthalein skeleton. CONSTITUTION:The polycarbonate to be used is the polycarbonate which contains the unit (carbonate bond units A) including at least >=1 suspended arom. groups among the units constituting the carbonate bonds at 25-100wt% by the weight of the total carbonate bond constituting units and is the polycarbonate in which the units having the phenol phthalein skeleton are incorporated at 20-100wt% by the weight of the total carbonate bond units. Such polycarbonate is obtd. by blowing phosgene to >=1 kinds of the diols which can provide the suspended arom. groups and are expressed by, for example, the formula and subjecting the same to boundary or soln. polymn. The molding having the excellent heat resistance and small optical strain is thus obtd.