(Co)polycarbonate composition containing boric acid and a basic catalyst

A linear high molecular weight (co) polycarbonate composition consisting essentially of a (co)polycarbonate;

• a basic compound selected from the group consisting of a metal salt of boric acid, a nitrogen containing basic compound, an alkali metal compound, an alkaline earth metal compound, and a mixture of a nitrogen-containing basic compound and a compound selected from the group consisting of an alkali metal compound and an alkaline earth compound;
• and boric acid;
• and having a terminal hydroxyl concentration of from 8 to 30% per mol, a viscosity-average molecular weight of from 10,000 to 100,000 and a hue value of about 0.2 or below;
• wherein (a) the amount of the metal salt of boric acid, alkali metal compound or alkaline earth metal compound is 10.sup.-8 to 10.sup.-1 mol per mol of the (co) polycarbonate, (b) the amount of nitrogen-containing basic compound in an amount of from 10.sup.-5 to 10.sup.-1 mol per mol of the (co)polycarbonate and (c) the total amount of the boron atom of the boric acid is 0.01 to 500 times per mole the amount of metal atoms of the metal salt of boric acid, alkali metal compound, the alkaline earth metal compound, the basic group of the nitrogen containing basic compound and the metal atoms and the basic group of the mixture of a nitrogen-containing basic compound and a compound selected from the group consisting of an alkali earth compound and an alkaline earth compound.