METHOD FOR PREPARING REACTIVELY TERMINATED POLYCARBONATES

摘要

RD-19771 METHOD FOR PREPARING REACTIVELY TERMINATED POLYCARBONATES Salicylate-terminated polycarbonates are prepared by the reaction of an organic dihydroxy compound and phosgene in the presence of a salicylate chloroformate, preferably ocarbomethoxyphenyl chloroformate. The reaction is typically conducted interfacially. The salicylate chloroformate may be produced in situ by the reaction of phosgene with a mixture of a salicylic acid ester and a bisphenol such as bisphenol A.