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US 3,943,101 AGranted
Process for preparing polycarbonates with a metal chelating agent
AssigneeGeneral Electric Company
InventorsJorgen H. Vestergaard, Gary W. Ragsdale
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Abstract
An improved process for preparing a color stable polycarbonate by carrying out the reaction in the presence of an additive. The additive employed herein is gluconic acid or its alkali metal salts.
Claims11
In a process for preparing a color stable aromatic carbonate polymer by reacting a dihydric phenol and an alkali metal hydroxide with a carbonate precursor, the improvement which comprises carrying out the reaction in the presence of a stabilizing amount of gluconic acid or its alkali metal salts.
Dependencies are inferred from the claim text.