Two phase interfacial polycondensation polycarbonate process

Details Two phase interfacial polycondensation polycarbonate process Two phase interfacial polycondensation polycarbonate process

C - Chemistry, Metallurgy

08

G

402/172

C08G 64/24 (2006.01)

Patent

CA 1231194

TWO PHASE INTERFACIAL POLYCONDENSATION POLYCARBONATE PROCESS ABSTRACT OF THE DISCLOSURE This invention relates to an improved interfacial polycondensation aromatic polycarbonate process which does not require large quantities of strong base to provide a particulate product. The process is specific to interfacial polycondensation processes wherein the polycarbonate is formed in the aqueous phase by using a low organic to aqueous phase volume ratio. The quantity of strong base required to provide a particular product is reduced by adding the aromatic dihydroxy compound to the reaction mixture in small increments. This maintains a high mole ratio of strong base to aromatic dihydroxy compound during reaction.

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