发明授权
US06410678B1 Aromatic polycarbonate, production method and molded products thereof
有权
芳香族聚碳酸酯,其制造方法及其成型品
- 专利标题: Aromatic polycarbonate, production method and molded products thereof
- 专利标题(中): 芳香族聚碳酸酯,其制造方法及其成型品
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申请号: US09890465申请日: 2001-08-01
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公开(公告)号: US06410678B1公开(公告)日: 2002-06-25
- 发明人: Makoto Ishida , Koji Ishihata , Koji Maeda , Wataru Funakoshi , Hiroaki Kaneko , Yuichi Kageyama , Katsushi Sasaki
- 申请人: Makoto Ishida , Koji Ishihata , Koji Maeda , Wataru Funakoshi , Hiroaki Kaneko , Yuichi Kageyama , Katsushi Sasaki
- 优先权: JP11-344724 19991203; JP11-344725 19991203; JP11-344726 19991203; JP11-344727 19991203; JP11-344728 19991203; JP2000-000277 20000105
- 主分类号: C08G6400
- IPC分类号: C08G6400
摘要:
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.