Über Cyclische carbonate aromatischer Dihydroxyverbindungen

Aus 2,2‐(4,4′‐Dihydroxydiphenyl)‐propan, 1,1‐(4,4′‐Dihydroxydiphenyl)‐cyclohexan, 2,2‐(4,4′‐Dihydroxy‐3,3′‐dimethyl‐diphenyl)‐propan, 2,2‐(4,4′‐Dihydroxy‐3,3′,5,5′‐tetrachlordiphenyl)‐propan und 4,4′‐Dihydroxydiphenylsulfid werden nach dem Verdünnungsprinzip cyclische tetramere Carbonate hergestellt. Diese Verbindungen sind zu extrem hochmolekularen linearen Polycarbonaten polymerisierbar. Cyclic tetrameric carbonic acid esters from 2,2‐(4,4′‐dihydroxydiphenyl)‐propane, 1,1‐(4,4′‐dihydroxypiphenyl)‐cyclohexane, 2,2‐(4,4‐hydroxy‐3,3‐dimethyldipheny)‐propane, 2,2‐(4,4‐dihydroxy‐3,3,3,5,5‐tetrachlorodiphenyl)propane, and 4,4′‐dihydroxydiphenyl‐sulphide were obtained by utilization of the dilution principle. Polymerisation of these compounds yields linear polycarbonates with extremely high molecular weights.