| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a polycarbonate resin which has an excellent reaction yield, reduced amounts of terminal chloroformate group and terminal OH group as qualities of obtained polycarbonate, excellent heat stability during molding and dry-heat discoloration resistance of molding by completing a condensation polymerization reaction by a simple method and facilities in a short time and facilities therefor. SOLUTION: In the method for continuously producing the polycarbonate resin by reacting an alkaline aqueous solution of dihydric phenol with phosgene in the presence of an organic solvent to form a carbonate oligomer reaction solution and then carrying out an interfacial condensation polymerization reaction, the oligomer reaction solution is made into a water-in-oil type emulsified state, the interfacial condensation polymerization reaction is carried out while maintaining the emulsified state in a laminar flow by a tubular reactor and a condensation polymerization catalyst is added in the middle of the tubular reactor. The production apparatus comprises facilities for mixing molecular weight adjuster with the alkaline aqueous solution, emulsion facilities for emulsifying the reaction solution in a highly emulsified state and the tubular reactor with a heat insulating material equipped with a device for adding and mixing the catalyst in the middle of the facilities. COPYRIGHT: (C)2004,JPO
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