| 摘要 |
A method for producing a polycarbonate resin having recurring units represented by the general formulae (I) and (II): where R1 and R2 represents an alkyl group having one to six carbon atoms, and X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, -S-, -SO-, -SO2-, -O-, -CO-, or the like, R3 and R4 each represents an alkyl group having 1 to 3 carbons, and Y represents a linear or branched alkylene group having 2 to 15 carbons, a - d are each an integer of 0 to 4 and n is an integer of 2 to 450, by the interfacial polymerization method, wherein a polycarbonate copolymer is produced by using a phenol-modified diol having a content of hydroxybenzoic acids of 500 mass ppm or less as a raw material. The above method allows the production being improved in productivity, in the production of a PC copolymer having a specific structure using a diester diol as a raw material. ® KIPO & WIPO 2007
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