Copolyestercarbonate composition derived from dihydricphenol, carbonate precursor and alpha omega-dicarboxylic acid
AssigneeGeneral Electric Company
InventorsLuca P. Fontane, Kenneth F. Miller, Christianus A. A. Claesen, Peter W. van Es, Theodorus O. N. de Vroomen, Clayton V. Quinn, Richard W. Campbell
Life of this patent
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Abstract
A composition comprising a copolyestercarbonate derived from a dihydric phenol, a carbonate precursor, and an aliphatic alpha omega dicarboxylic acid or ester precursor wherein the dicarboxylic acid or ester precursor has from 10 to about 20 carbon atoms, inclusive, and is present in the copolyestercarbonate in quantities of from about 2 to 30 mole percent of the dihydric phenol.
Claims14
A composition comprising a copolyestercarbonate derived from a dihydric phenol, a carbonate precursor, and an aliphatic alpha omega dicarboxylic acid or ester precursor wherein the dicarboxylic acid or ester precursor has from 10 to about 20 carbon atoms, inclusive, is present in the copolyestercarbonate in quantities of from about 2 to 30 mole percent of the dihydric phenol and is converted to a salt before reaction with the dihydric phenol and the carbonate precursor and wherein the carbonate precursor is added over a period of time and, from about 0 to about 95% of the period of time, the pH of the reaction is from about 8 to 8.5 and, for the remainder of the period, the pH of the reaction is from about 10 to 12.
A composition comprising a copolyester-carbonate having repeating units of the structure ##STR6## wherein:
- R is independently selected from halogen, monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals;
- R.sup.1 is independently selected from halogen, monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals;
- W is selected from divalent hydrocarbon radicals,
- n and n.sup.1 are independently selected from integers having a value of from 0 to 4 inclusive;
- b is either zero or one;
- X is an aliphatic group of about 8 to 18 carbon atoms, inclusive;
- ##STR7## c is from about 2 to 30 mole percent of the total units c+d and wherein the composition is derived from a dihydric phenol, a carbonate precursor, and an aliphatic alpha omega dicarboxylic acid or ester precursor wherein the dicarboxylic acid or ester precursor is converted to a salt before reaction with the dihydric phenol and the carbonate precursor and wherein the carbonate precursor is added over a period of time and, from about 0 to about 95% of the period of time, the pH of the reaction is from about 8 to 8.5 and, for the remainder of the period, the pH of the reaction is from about 10 to 12.
Dependencies are inferred from the claim text.