| 摘要 |
Ordered copolyestercarbonate resins having repeating units of the formula: <IMAGE> wherein a portion of R1 is meta-phenylene and a portion of R1 is para-phenylene and R is independently an aromatic hydrocarbylene or inertly substituted aromatic hydrocarbylene, e.g., <IMAGE> exhibit physical properties such as heat resistance, clarity and impact strength that are superior to the comparable properties of corresponding random copolymers. They exhibit melt processability that is superior to the melt processability of corresponding copolyestercarbonates wherein R1 is entirely para-phenylene. They exhibit heat resistance, notch sensitivity and low temperature impact resistance that are superior to comparable properties of corresponding copolyestercarbonates wherein R1 is entirely meta-phenylene. Such resins are useful for making transparent tough films and molded articles having high heat resistance. |
