Robust process for the synthesis of polyestercarbonates

A method for preparing a polyestercarbonate, the method comprising reacting a dihydric phenol and a diacid having from about 16 to about 18 carbon atoms in the presence of an effective amount of carbonate precursor, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 8.5 to about 9.0 for about 50 to about 95% of the total carbonate precursor addition, and a second pH range of from about 10 to about 12 for the remainder of the carbonate precursor addition.

A method for preparing a polyestercarbonate, the method comprising reacting a dihydric phenol and a diacid having from 16 to 18 carbon atoms in the presence of an effective amount of carbonate precursor, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 8.5 to about 9.0 for about 50 to about 95% of the total carbonate precursor addition, and a second pH range from about 10 to about 12 for the remainder of the carbonate precursor addition.

A method for preparing a polyestercarbonate, the method comprising reacting a dihydric phenol and a diacid having 16 carbon atoms in the presence of an effective amount of carbonate precursor, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 9.0 to about 9.5 for about 50 to about 95% of the total carbonate precursor addition, and a second pH range of from about 10 to about 12 for the remainder of the carbonate precursor addition.

A method for preparing a polyestercarbonate, the method comprising reacting BPA and hexadecanedioic acid in the presence of an effective amount of phosgene, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 8.5 to about 9.0 for about 50 to about 95% of the total carbonate precursor addition, and a second pH range of from about 10 to about 12 for the remainder of the phosgene addition.

A method for preparing a polyestercarbonate, the method comprising reacting a dihydric phenol and octadecanedioic acid in the presence of an effective amount of carbonate precursor, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 8.5 to about 9.0 for about 50% to about 95% of the total carbonate precursor addition, and a second pH range of from about 10 to about 12 for the remainder of the carbonate precursor addition.

A method for preparing a polyestercarbonate, the method comprising reacting BPA and octadecanedioic acid in the presence of an effective amount of phosgene, thereby forming a reaction mixture, wherein the pH of the reaction mixture is maintained in an initial pH range of from about 8.5 to about 9.0 for about 50 to about 95% of the total carbonate precursor addition, and a second pH range of from about 10 to about 12 for the remainder of the phosgene addition.