Patent ID: 7084233
Filing Date: 2006-08-01
Classification: C08G,Y10T

Abstract:
1. An aromatic polycarbonate having a viscosity-average molecular weight of 16,000 or higher that is obtained by the transesterification method, wherein the ratio of the weight-average molecular weight (Mw) to number-average molecular weight (Mn), as measured by gel permeation chromatography and calculated for standard polystyrene (Mw/Mn) of the aromatic polycarbonate, is in the range of from 2.8 to 4.5 and wherein the proportion of the number of moles of all branched structural units to 1 mol of structural units represented by formula (1) is higher than 0.3 mol % and not higher than 0.95 mol %: wherein X is a member selected from the group consisting of 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 and bivalent group selected from the group consisting of —O—, —S—, —CO—, —SO—, and —SO 2 —.