| 摘要 |
A polycarbonate copolymer having a desirable heat resistance and impact resistance, and a process for producing the copolymer. The polycarbonate copolymer comprises a carbonate structural unit of the formula (I): <IMAGE> (I) wherein A is alkylidene, alkylene, arylene, arylalkylene, -O-, -S-, -SO2- or a single bond, and a carbonate structural unit of formula (II): <IMAGE> (II) wherein X1 and Y1 are hydrogen, halogen or an organic group and m and n are 1 to 4, wherein the proportion of the carbonate structural unit of the formula (II) being 2 to 15 mole % based on the amount of the carbonate structural unit of the formulas (I) and (II), and the viscosity average molecular weight of the copolymer being 15,000 to 40,000. The polycarbonate copolymer is produced by an interfacial polycondensation of an aromatic diol and a fluorene compound, with phosgene or a phosgene derivative in the presence of methylene chloride as an inert organic solvent, the fluorene derivative being in the form of aqueous solution in potassium hydroxide.
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