Polycarbonate prepolymer for solid phase polymerization and process for producing polycarbonate

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.