申请人:TEIJIN LIMITED
公开号:EP1149852A1
公开(公告)日:2001-10-31
An aromatic polycarbonate which has high durability and is excellent in color tone, transparency and mechanical strength, especially an aromatic polycarbonate which has high durability and stability when it is used under high temperature and high humidity conditions for a long time, and production method and use thereof.
In the aromatic polycarbonate which has a sodium element content of 100 ppb or less and a content of each of Ni, Pb, Cr, Mn and Fe of 70 ppb or less and the method of producing a polycarbonate by polycondensing an aromatic dihydroxy compound and a carbonic acid diester, the above aromatic polycarbonate is produced by controlling 1) the content of sodium element contained in each of the above raw materials to 52 ppb or less, 2) the content of each of Fe, Cr, Mn, Ni and Pb to 40 ppb or less and 3) the amount of a specific catalyst to a specific value based on the content of Fe contained in the raw materials.
一种具有高耐久性且色调、透明度和机械强度优异的芳香族聚碳酸酯,特别是一种在高温和高湿条件下长期使用时具有高耐久性和稳定性的芳香族聚碳酸酯及其生产方法和用途。
在钠元素含量小于或等于 100 ppb,镍、铅、铬、锰和铁各元素含量小于或等于 70 ppb 的芳香族聚碳酸酯中,以及通过芳香族二羟基化合物和碳酸二酯缩聚生产聚碳酸酯的方法中、生产上述芳香族聚碳酸酯的方法是:1)将上述每种原料中所含钠元素的含量控制在 52 ppb 或以下;2)将铁、铬、锰、镍和铅中每种元素的含量控制在 40 ppb 或以下;3)根据原料中所含铁元素的含量,将特定催化剂的用量控制在特定值。