Patent ID: 7271235

Claim:
A branched aromatic polycarbonate produced by transesterification and having a viscosity average molecular weight of at least 16,000, wherein the amount of structural units of the following formula (1) contained in its main chain is within a range of from 2,000 to 50,000 wtppm, and the amounts of structural units of the following formulae (2) and (3) contained in its main chain are within a range of from 30 to 10,000 wtppm, respectively: wherein X is a single bond, a C 1-8 alkylene group, a C 2-8 alkylidene group, a C 5-15 cycloalkylene group, a C 5-15 cycloalkylidene group or a member selected from bivalent groups represented by —O—, —S—, —CO—, —SO— and —SO 2 —, wherein X is a single bond, a C 1-8 alkylene group, a C 2-8 alkylidene group, a C 5-15 cycloalkylene group, a C 5-15 cycloalkylidene group or a member selected from bivalent groups represented by —O—, —S—, —CO—, —SO— and —SO 2 —; wherein the total amount of structural units of the following formulae (4) and (5) contained in its main chain is within a range of from 10 to 10,000 wtppm: wherein X is a single bond, a C 1-8 alkylene group, a C 2-8 alkylidene group, a C 5-15 cycloalkylene group, a C 5-15 cycloatkylidene group or a member selected from bivalent groups represented by —O—, —S—, —CO—, —SO— and —SO 2 —.