Patent ID: 8487065

Claim:
A copolycarbonate-polyester, comprising units of formula wherein at least 60 percent of the total number of R 1 groups are divalent aromatic organic radicals and the balance thereof are divalent aliphatic or alicyclic radicals; units of formula wherein T is a C 7-20 divalent alkyl aromatic radical or a C 6-20 divalent aromatic radical, and D is a divalent C 6-20 aromatic radical; and units of the formula wherein R 2 and R 3 are each independently a halogen or a C 1-6 alkyl group, R 4 is a methyl or phenyl group, each c is independently 0 to 4, and T is as described above and wherein units of the formula (15) are present in an amount less than or equal to 15% based on the total number of carbonate linkages as determined by carbon 13 nuclear magnetic resonance spectroscopy.