DIHYDROXYDIPHENYL CYCLOALKANES, THEIR PRODUCTION AND THEIR USE FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT POLYCARBONATES

摘要

Dihydroxydiphenyl cycloalkanes corresponding to the formula (see fig. I) in which R1 and R2 independently of one another represent hydrogen, halogen, C1-C8 alkyl, C5-C6 cycloalkyl, C6-C10 aryl and C7-C12 aralkyl, m is an integer of from 4 to 7, R3 and R4, individually selectable for each X, independently of one another represent hydrogen or C1-C6 alkyl and X represents carbon with the proviso that, at at least one atom X, both R3 and R4 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.