Copolyester-carbonate resins having trimellitic acid units in the polymer backbone and their use as crosslinking or branching agents

摘要

Thermoplastic copolyester-carbonate resins are described, having included in their polymer chains, a moiety of the formula: <IMAGE> (I) wherein a and b are each whole number integers of from 0 to 1; and the sum of a+b is 1. The resins are useful intermediates for branched or cross-linked molding compositions.