Bis(4-hydroxyphenyl)cycloalkanes

Abstract

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.

What is claimed is: 
     
       1. A heterocyclohexylidenebisphenol having the formula ##STR5## wherein X is S, SO.[.,.]. .Iadd.or .Iaddend.SO 2  .[.or N--OCOR and R is a C 1-4  primary or secondary alkyl or C 6-8  aromatic radical.].. 
     
     
       2. A heterocyclohexylidenebisphenol according to claim 1 wherein X is S. 
     
     
       3. A heterocyclohexylidenebisphenol according to claim 1 wherein X is SO. 
     
     
       4. A heterocyclohexylidenebisphenol according to claim 1 wherein X is SO 2 . .[.5. A heterocyclohexylidenebisphenol according to claim 1 wherein X is N--OCOR.].. .[.6. A heterocyclohexylidenebisphenol according to claim 5 wherein R is methyl..].