Method for preparing reactively terminated polycarbonates

Details Method for preparing reactively terminated polycarbonates Method for preparing reactively terminated polycarbonates

C - Chemistry, Metallurgy

08

G

402/175

C08G 64/22 (2006.01) C08G 64/14 (2006.01)

Patent

CA 2021108

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 o- carbomethoxyphenyl 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.

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