发明授权
US4605731A Method for preparing linear polycarbonate from cyclic oligomer with aryl
carbanion generating catalyst
失效
由环状低聚物与芳基碳负离子产生催化剂制备线性聚碳酸酯的方法
- 专利标题： Method for preparing linear polycarbonate from cyclic oligomer with aryl carbanion generating catalyst
- 专利标题（中）： 由环状低聚物与芳基碳负离子产生催化剂制备线性聚碳酸酯的方法
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申请号： US723672申请日： 1985-04-16
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公开(公告)号： US4605731A公开(公告)日： 1986-08-12
- 发明人: Thomas L. Evans , David A. Williams
- 申请人： Thomas L. Evans , David A. Williams
- 申请人地址： NY Schenectady
- 专利权人： General Electric Company
- 当前专利权人： General Electric Company
- 当前专利权人地址： NY Schenectady
- 主分类号： C08G63/00
- IPC分类号： C08G63/00 ; C08G64/20 ; C08G64/30 ; C08G63/62
摘要：
Cyclic polycarbonate oligomers are converted to linear polycarbonate resins by heating with a polycarbonate formation catalyst which generates aryl carbanions at temperatures up to about 300.degree. C. The preferred catalysts are tetraarylborates such as tetramethylammonium tetraphenylborate.
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