Patent ID: 7812078

Claim:
A thermoplastic composition comprising: a polycarbonate, and an aromatic sulfonate compound of formula (Y) m —Ar—(Z—S(O) 2 —X) n wherein each X is independently a substituted or unsubstituted C 1 -C 20 alkyl, substituted or unsubstituted C 1 -C 20 arylalkyl, substituted or unsubstituted C 6 -C 20 aryl, or substituted or unsubstituted C 7 -C 40 alkylaryl, Z is —O—or substituted or unsubstituted —(—O—C 1-20 —) w —O—, wherein w is 1 to 20, Ar is a C 6 -C 62 aromatic group; m is 0-3 and n is 3-6; and each Y is independently C 1 -C 20 alkyl, substituted C 1 -C 20 alkyl, C 6 -C 20 aryl, C 1 -C 8 alkyl-substituted C 6 -C 20 aryl, halogen, nitro, C 1 -C 20 alkoxycarbonyl, C 1 -C 20 alkoxy, or C 1 -C 20 acyl, and a ionizing radiation stabilizing additive, wherein a molded article having a thickness of 3.2±0.12 millimeters and consisting of the polycarbonate, aromatic sulfonate compound, and an effective amount of each of a mold-release agent and an antioxidant has, after exposure to a total gamma radiation dose of 83 kGy and when measured according to ASTM D1925-70, an increase in yellowness index (dYI) of less than or equal to 45, when compared to the unexposed molded article.