The process of claim 11 wherein the copolyester-carbonate obtained is represented by the general formula C--A--B)n (A)m C wherein A can be a dihydric phenol, a phenolic copolymer, and mixtures thereof; B is a member selected from the group consisting of diacid chlorides and mixtures thereof; C is a chain stopper; and, m and n are integers of about 1 to 2,000.