| 摘要 |
<p>A process for producing an aromatic polyesterpolycarbonate, which comprises polycondensing (a) a dihydroxydiaryl compound, (b) a terephthaloyl chloride and/or isophthaloyl chloride reactant, and (c) phosgene by an interfacial polymerization process in the presence of water, methylene chloride and an acid binding agent thereby preparing an aromatic polyesterpolycarbonate product containing structural unitsoftheformula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="12" wi="80" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein X is a divalent group, and the aromatic rings may be substituted, and structural units of the formula:
<Chemistry id="chema02" num="0002"><Image id="ia02" he="17" wi="81" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein X is a divalent group, and the aromatic rings may be substituted, said condensation reaction being characterized in that after at least 95% of the total -COC1 groups in the terephthaloyl chloride and/or isophthaloyl chloride and phosgene as starting materials has reacted, a chloroformate compound or additional phosgene is added to the reaction mixture in an amount to bring the concentration of -COC1 groups to a level of 10 to 1000 µeq/g relative to the total amount of the above starting materials to complete the reaction.</p> |
