Patent ID: 8623948

Claim:
A thermoplastic composition comprising a polycarbonate, 0.3 to 1.0 parts by weight, per 100 parts of the polycarbonate, of a perfluoroalkyl sulfonate phosphonium salt according to the formula: wherein n is an integer of 0 to 3 and each R is independently a C 1-22 alkyl group, or three of the R groups are the same R group selected from the C 1-8 alkyl group and the fourth R group is different from the first three R groups and is a C 7-22 aralkyl group or a C 1-22 alkyl group, and 0.03 to 0.16 parts by weight, per 100 parts by weight of the polycarbonate, of a non-phosphonium perfluoroalkyl sulfonate salt according to the formula: wherein n is an integer of 0 to 3 and Z + is a non-phosphonium cation, wherein a molded flat disk prepared from the thermoplastic composition has a surface resistivity that is at least 20% lower than the surface resistivity of a molded flat disk prepared from a thermoplastic composition consisting essentially of the polycarbonate and perfluoroalkyl sulfonate phosphonium salt but without the non-phosphonium perfluoroalkyl sulfonate salt.