Process for producing polycarbonates
OwnerSilke Kratschmer, Uwe Hucks +1inventors
InventorsSilke Kratschmer, Uwe Hucks, Michael Prein
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Abstract
A continuous process for producing polycarbonates by the transesterification of didiaryl carbonates with dihydroxyaryl compounds in the presence of quaternary onium compounds is disclosed. The polycarbonates thus produced are suitable for preparing a variety of articles.
Claims12
A continuous process for producing polycarbonate comprising transesterifying didiaryl carbonate with dihydroxyaryl compound, and condensing in the presence of a quaternary onium compound catalyst, said condensing including a final stage, said process characterized in the absence of additional catalyst from said final stage.
Dependencies are inferred from the claim text.