公开(公告)号：US4153780A

公开(公告)日：1979-05-08

申请号：US436333

申请日：1974-01-14

申请人： Yoshihiro Narita ,  Hideo Konuma ,  Sanae Tagami ,  Hirosi Yamada

发明人： Yoshihiro Narita ,  Hideo Konuma ,  Sanae Tagami ,  Hirosi Yamada

IPC分类号： C09K3/00 ,  C08G63/00 ,  C08G64/14 ,  C08G64/22 ,  C08G64/24 ,  C08L69/00 ,  C08G63/62

CPC分类号： C08G64/14 ,  C08G64/24

摘要： A process is provided for preparing a polycarbonate composition with excellent weatherproof properties. The process comprises adding an ultraviolet absorbing compound having a hydroxy group which contributes at least partially to the molecular weight modifier to an oligomeric polycarbonate which is obtained by the reaction of a dioxy compound with phosgene, and then condensing said oligomeric polycarbonate to polymerize the same. The invention also concerns a process for preparing a polycarbonate with excellent weatherproof properties which process comprises introducing a dioxy compound in alkaline solution and an organic solvent for the polycarbonate into a tubular reactor continuously to form a turbulent flow, feeding phosgene concurrently to the reactor with cooling outside of the reactor to produce an oligomeric polycarbonate as the solution of organic solvent, adding an aqueous alkaline solution of dioxy compound, molecular weight modifier, which is contained at least in part ultraviolet absorbing compound having an hydroxy group, and catalyst selected from the group consisting of tertiary amine and quaternary ammonium salt and, if desired, antioxidant to said oligomeric polycarbonate solution and condensing said oligomeric polycarbonate to polymerize the same.

摘要翻译： 提供了制备具有优异耐候性的聚碳酸酯组合物的方法。 该方法包括将具有至少部分贡献于分子量调节剂的羟基的紫外线吸收化合物加入通过二氧化合物与光气反应获得的低聚聚碳酸酯，然后使所述低聚物聚碳酸酯聚合。 本发明还涉及一种制备具有优良耐候性的聚碳酸酯的方法，该方法包括将二氧化合物在碱性溶液中引入，并将聚碳酸酯的有机溶剂连续引入管状反应器中以形成湍流，同时将光气同时送入反应器 在反应器外部产生低聚聚碳酸酯作为有机溶剂的溶液，加入至少部分含有羟基的紫外线吸收化合物的二氧基化合物的分子量调节剂的碱性水溶液和选自以下的催化剂： 由叔胺和季铵盐组成，如果需要，将抗氧化剂包含在所述低聚聚碳酸酯溶液中，并冷凝所述低聚物聚碳酸酯以使其聚合。