Patent ID: 7309755

Claim:
A method for making a polycarbonate article comprising the steps of: 1) producing an aromatic polycarbonate by a melt reaction process comprising the steps of: a) transesterifying a diaryl carbonate and a dihydroxy compound in the presence of a catalyst system to form an intermediate aromatic polycarbonate, wherein said catalyst system comprises (i) an alpha catalyst selected from the group consisting of alkali metal salts and alkaline earth metal salts; and (ii) a beta catalyst selected from the group consisting of quaternary ammonium compounds and quaternary phosphonium compounds; b) adding to said intermediate aromatic polycarbonate a catalyst quencher; and 2) rotation molding the polycarbonate into an article at a rotation molding temperature from about 305° C. to about 360° C., wherein said aromatic polycarbonate has a molecular weight from 25,000 up to about 36,000.