| 摘要 |
A process for producing polycarbonate is described, comprising reacting a chloroformate group-containing polycarbonate oligomer with an aqueous alkaline solution of a compound containing at least three functional groups and, thereafter, interfacial polycondensing the above-obtained reaction product with an aqueous alkaline solution of a dihydric phenol compound. The thus-produced polycarbonate has good melt characteristics compared with conventional polycarbonates, and the dependence of melt viscosity on a rate of shear is large. Thus, the polycarbonate of the invention is suitable for extrusion molding, particularly for blow molding using an extrusion molding machine, and can provide good quality sheets or molds.
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