METHOD FOR PRODUCTION OF POLYCARBONATE CONTAINING PLANT-DERIVED COMPONENT

摘要

Disclosed is a method for producing a polycarbonate containing a plant-derived component and represented by the formula (3) by the melt polycondensation of a diol with a carbonic acid diester, wherein the diol contains Na, Fe and Ca at a total content of 2 ppm or less, has a purity analysis value of 99.7% or greater as measured by gas chromatography and is represented by the formula (1), and wherein the carbonic acid diester contains Na, Fe and Ca at a total content of 2 ppm or less, has a purity analysis value of 99.7% or greater as measured by gas chromatography and is represented by the formula (2). (1) wherein R₁ to R₄ independently represent a group selected from a hydrogen atom, an alkyl group, a cycloalkyl group and an aryl group. (2) wherein R₅ and R₆ independently represent a group selected from an alkyl group, a cycloalkyl group and an aryl group, provided that R₅ and R₆ may be the same as or different from each other. (3) wherein R₁ to R₄ independently represent a group selected from a hydrogen atom, an alkyl group, a cycloalkyl group and an aryl group; and n represents the number of repeating units.