发明名称 |
Method for producing an aromatic polycarbonate |
摘要 |
<p>A method for producing an aromatic polycarbonate comprises feeding to a feeding zone (having a perforated plate) at least one polymerizing material selected from the group consisting of a) a molten monomer mixture of an aromatic dihydroxy compound and a diaryl carbonate, and b) a molten prepolymer obtained by a process comprising reacting an aromatic dihydroxy compound with a diaryl carbonate, and allowing the polymerizing material to pass downwardly through the perforated plate and fall along and in contact with a wire through a wire-wetting fall polymerization reaction zone, thereby effecting polymerization of the polymerizing material during the wire-wetting fall thereof. Colorless and high quality aromatic polycarbonates are thus stably produced at a high polymerization rate for a prolonged period of time, using an apparatus which has excellent sealing properties under high vacuum and maintenance of which is easy. <IMAGE></p> |
申请公布号 |
EP0738743(A1) |
申请公布日期 |
1996.10.23 |
申请号 |
EP19960200706 |
申请日期 |
1994.07.21 |
申请人 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
发明人 |
KOMIYA, KYOSUKE;KAWAKAMI, YOSHIFUMI;OKAMOTO, HIROSHIGE |
分类号 |
B01J19/24;C08G64/20;C08G64/30;(IPC1-7):C08G64/20;B01J19/26 |
主分类号 |
B01J19/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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