| 摘要 |
A heterocyclohexylidenebisphenol having the formula <IMAGE> (I) wherein X is S, SO[,] or SO2 [or N-COR and R is a C1-4 primary or secondary alkyl or phenyl optionally substituted by an ethyl or 1-2 methyl groups] may be prepared by the reaction of phenol or a similar compound with the corresponding thiopyranone [or piperidone]. The thio compound may be oxidized to the corresponding sulfoxide or sulfone. Polycarbonates prepared from said heterocyclic bis(4-hydroxyphenyl) cycloalkanes having high glass transition temperatures and are expected to be ductile.
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