Patent ID: 7649039

Claim:
A thermoplastic composition comprising: a polycarbonate, and an aromatic sulfonate compound of formula: Ar 1 —S(O) 2 —O—L—O—S(O) 2 —Ar 1 wherein each Ar 1 is independently a substituted or unsubstituted aryl group, and L is a substituted or unsubstituted, branched divalent aliphatic hydrocarbon wherein the branch is within three carbon atoms of a linking oxygen of a sulfonyl group, and wherein a molded article having a thickness of 3.2±0.12 millimeters and consisting of the polycarbonate, the aromatic sulfonate compound, and an effective amount of each of an aliphatic diol, 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.