Patent ID: 7112645

Claim:
A polycarbonate composition comprising chloride, sulfate, phosphate or a combination of two or more of the foregoing ionic species, wherein the chloride, sulfate, phosphate, or combination of ionic species is present in an amount of zero to about 100 parts per billion based on the total weight of the polycarbonate; and phenol, carbonic diester, aromatic dihydroxy compound or combination of two or more of the foregoing organic compounds, wherein the phenol, carbonic diester, aromatic dihydroxy compound, or combination of the foregoing organic compounds is present in an amount of zero to about 500 parts per million by weight based on the total weight of the polycarbonate; wherein the polycarbonate has a weight average molecular weight of about 40,000 to about 90,000 dalton as determined by gel permeation chromatography using polystyrene standards and a melt volume rate of about 1 to about 35 cubic centimeters 10 mutes when measured at about 300° C. with a force of about 1.2 kilograms.