Patent ID: 8715552
Filing Date: 2014-05-06
Classification: B29B,B29K

Abstract:
1. A production method of an aromatic polycarbonate, comprising extrusion molding an aromatic polycarbonate with an extruder and pelletizing the same wherein a shear rate (γ) at an outlet of the extruder is in a range of from 100 to 500 sec wherein a viscosity average molecular weight (Mv) is 13,000 or more, the proportion of hydroxyl group (OH) in the whole terminal groups is from 5 to 50 mol %, and a ratio of the total mole number of branched structural units to one mole of a structural unit represented by the following formula (a) is from 0.1 to 0.8 mol %: wherein X represents a single bond, an alkylene group having from 1 to 8 carbon atoms, an alkylidene group having from 2 to 8 carbon atoms, a cycloalkylene group having from 5 to 15 carbon atoms, a cycloalkylidene group having from 5 to 15 carbon atoms, or a divalent group selected from the group consisting of —O—, —S—, —CO—, —SO— and —SO