Method for preparation of aromatic polyesterpolycarbonate

Details Method for preparation of aromatic polyesterpolycarbonate Method for preparation of aromatic polyesterpolycarbonate

C - Chemistry, Metallurgy

08

G

402/178

C08G 63/64 (2006.01)

Patent

CA 1171594

Abstract of the Disclosure: An aromatic polyesterpolycarbonate containing a dihydroxy-diaryl compound residue, a terephthalic acid residue and/or isophthalic acid residue, and a carbonate bond in a molar ratio of 1 : 0.25-0.75 : 0.75-0.25 is prepared by first mixing and reacting an aqueous alkaline solution of a dihydroxy-diàryl compound, an organic solvent solution of terephthaloyl chloride and/or isophthdloyl chloride, and phosgene to obtain a polyesterpolycarbonate oligomer having -OCOCl groups, -COCl groups and -OH groups as end groups and then subjecting the oligomer to poly- condensation with a caustic alkali in the substantial absence of the dihydroxy-diaryl compound.

399728

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