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专利名称：Polycarbonate from heterocyclic bis(4-hydroxyphenyl)cycloalkane
发明人：John C. Schmidhauser申请号：US07/9316申请日：19921211公开号：US05300622A公开日：19940405
摘要：Heterocyclic bis(4-hydroxyphenyl)cycloalkanes, as illustrated by 4,4- bis(4-hydroxyphenyl)thiopyran and the corresponding acetylated piperidine, may be preparedby the reaction of bisphenol A or a similar compound with the corresponding
thiopyranone or piperidone. The thio compound may be oxidized to the correspondingsulfone. Polycarbonates prepared from said heterocyclic bis(4-hydroxyphenyl)cycloalkanes have high glass transition temperatures and are expected tobe ductile.
申请人：GENERAL ELECTRIC COMPANY
代理人：William H. Pittman
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