Patent ID: 7629431
Filing Date: 2009-12-08
Classification: C08G

Abstract:
1. A polycarbonate prepolymer for solid state polymerization, which is produced by an oxidative carbonylation reaction of an aromatic dihydroxy compound, and a monohydric phenol having a boiling point of 330° C. or below, carbon monoxide and oxygen, wherein the oxidative carbonylation reaction is conducetd in the presence of a catalyst composition comprising a carrier to which at least one compound selected from the group consisting of (a) a metal complex, (b) a compound having redox catalytic ability and (c) a compound capable of activating the aromatic hydroxy compound is bonded, and wherein (a) a ratio of aryl carbonate groups and hydroxyl groups, each constituting terminal groups of the prepolymer is from 2:8 to 8:2; (b) a molecular weight distribution (Mw/Mn) is from 1.1 to 2.1, wherein Mw is the weight average molecular weight of the polycarbonate prepolymer and Mn is the number average molecular weight of the polycarbonate prepolymer; and (c) a number average molecular weight (Mn) is from 1000 to 10000.