Process for producing polycarbonate resin having specific terminal OH/CO
value
    1.
    发明授权
    Process for producing polycarbonate resin having specific terminal OH/CO value 失效
    具有特定末端OH / CO值的聚碳酸酯树脂的制造方法

    公开(公告)号:US5319065A

    公开(公告)日:1994-06-07

    申请号:US48586

    申请日:1993-04-19

    摘要: There is provided a process for producing a polycarbonate resin containing less amounts of a terminal OH group and a residual monomer and having excellent heat resistance efficiently with a simple equipment. Said process comprises emulsifying an oligomer-containing reaction mixture obtained by the reaction of an alkaline aqueous solution of an aromatic dihydroxy compound with phosgene in the presence of an organic solvent, after adding a molecular weight modifier thereto, and performing polymerization while the reaction mixture is allowed to stand still in the emulsified state.

    摘要翻译: 提供一种使用简单的设备有效地生产含少量末端OH基和残留单体并且具有优异耐热性的聚碳酸酯树脂的方法。 所述方法包括在加入分子量调节剂之后,在有机溶剂存在下,将芳族二羟基化合物的碱性水溶液与光气反应获得的含低聚物的反应混合物乳化,并且在反应混合物为 允许静止在乳化状态。