Patent ID: 7686997

Claim:
A composition comprising, based on the total weight of polymer components in the composition, a combination of: 10 to 80 weight percent of a polyester comprising units of the formula wherein T is a residue derived from cyclohexanedicarboxylic acid, terephthalic acid, isophthalic acid, a chemical equivalent of the foregoing, or a combination thereof, and D is a residue derived from 1,4-cyclohexanedimethanol or a combination of cyclohexanedimethanol and a C 2-4 diol; 5 to 50 weight percent of a polycarbonate comprising units of the formula wherein each R 1 is independently the same or different divalent organic radical, and at least 60% percent of the organic radicals are aromatic; and 10 to 90 weight percent of a polyester-polycarbonate copolymer comprising, based on the total weight of the copolymer, 15 to 95 weight percent of arylate ester units of the formula wherein each R 4 is independently halogen, C 1-4 alkyl, or C 6-12 aryl, and p is 0 to 3, and 5 to 85 weight percent of aromatic carbonate units of the formula wherein each R 1 is as independently the same or different divalent organic radical, and at least 60% percent of the organic radicals are aromatic, and further wherein the polyester-polycarbonate copolymer comprises terminal groups derived from reaction with a monophenolic compound the formula wherein each R 5 is independently halogen, C 1-22 alkyl, C 1-22 alkoxy, C 1-22 alkoxycarbonyl, C 6-10 aryl, C 6-10 aryloxy, C 6-10 aryloxycarbonyl, C 6-10 arylcarbonyl, C 7-22 alkylaryl, C 7-22 arylalkyl, C 6-30 2-benzotriazole, or triazine, and q is 0 to 5.