Thermoplastic compositions, method of manufacture, and articles therefrom

A thermoplastic composition comprising

• a polycarbonatesiloxane-arylate;
• 0.001 wt % to 0.14 wt % of a phthalone compound based on the total weight of the thermoplastic composition;
• and
• optionally an additional component different from the polycarbonatesiloxane-arylate and the phthalone compound;
• wherein the phthalone compound has a formula:
• wherein
• Z1 represents the atoms necessary to complete a 9- to 13-membered single aromatic ring structure or a 9- to 13-membered fused aromatic ring structure,
• Z2 represents the atoms necessary to complete a pyridine or quinoline ring,
• each R1 and each R2 are independently halogen, an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, an aromatic or aliphatic thioether group, an aromatic or aliphatic carboxylic acid ester group, or an aromatic or aliphatic amide group,
• a is an integer from 0 to 6,
• b is an integer from 0 to 4,
• n is 1 or 2, and
• X is present only if n=2, and is a single bond or a divalent organic radical bonded to the Z1 ring structure through an ether, ketone, or thio linkage.