METHOD OF STABILIZATION OF DIHYDRIC PHENOLS
    7.
    发明申请
    METHOD OF STABILIZATION OF DIHYDRIC PHENOLS 审中-公开
    二羟基苯酚的稳定化方法

    公开(公告)号:US20070287796A1

    公开(公告)日:2007-12-13

    申请号:US11423526

    申请日:2006-06-12

    IPC分类号: C08G18/63 C08F2/44

    摘要: A method of producing a polycarbonate, the method comprising:polymerizing a dihydric phenol and a carbonate precursor in the presence of a stabilizer to provide a polycarbonate with a yellowness index of less than or equal to 10 measured in accordance with ASTM E313 test method on molded samples having a thickness of about 2.5 millimeters;wherein the stabilizer is selected from the group consisting of ascorbic acid, salts of ascorbic acid, esters of ascorbic acid and a mixture of two or more of the foregoing; wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms; and n is an integer having a value of 1 to 4.

    摘要翻译: 一种制备聚碳酸酯的方法,该方法包括:在稳定剂存在下聚合二元酚和碳酸酯前体,以提供根据ASTM E313测试方法测量的黄色指数小于或等于10的聚碳酸酯 样品厚度约2.5毫米; 其中所述稳定剂选自抗坏血酸,抗坏血酸盐,抗坏血酸酯和前述两种或多种的混合物; 其中二元酚由式(I)表示:其中R是氢原子或具有1至6个碳原子的脂族官能团; n为1〜4的整数。