Preparation of copolycarbonates

A process for the preparation of transparent copolycarbonate is disclosed. The copolycarbonate the molecular structure of which contains more than 35 mole % of units derived from dihydroxydiphenylene is prepared by the melt transesterification process wherein the final temperature of the reaction is...

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Bibliographic Details
Main Authors Kratschmer, Silke, Bunzel, Lothar, Deml, Hans
Format Patent
LanguageEnglish
Published 06.02.2003
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Summary:A process for the preparation of transparent copolycarbonate is disclosed. The copolycarbonate the molecular structure of which contains more than 35 mole % of units derived from dihydroxydiphenylene is prepared by the melt transesterification process wherein the final temperature of the reaction is reached in less than 40 minutes after reaching the starting temperature.