Dihydroxydiphenyl cycloalkanes, their production and their use for the production of high molecular weight polycarbonates

Abstract

Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl, m is an integer of from 4 to 7, R.sup.3 and R.sup.4, individually selectable for each X, independently of one another represent hydrogen or C.sub.1 -C.sub.6 alkyl and X represents carbon with the proviso that, at at least one atom X, both R.sup.3 and R.sup.4 are alkyl, a process for their production, their use for the production of high molecular weight polycarbonates, the polycarbonates made from dihydroxydiphenyl cycloalkane of formula (I) and films made from these polycarbonates.

Dependencies are inferred from the claim text.