| 发明名称 |
Two-stage process for the production of thermoplastic polycarbonate |
| 摘要 |
The invention relates to a two-stage process for the production of thermoplastic, solvent-free lightly branched polycarbonates in the melt using ammonium and/or phosphonium catalysts in the first stage and alkali metal and/or alkaline earth metal catalysts in the second stage.
|
| 申请公布号 |
US5399659(A) |
申请公布日期 |
1995.03.21 |
| 申请号 |
US19940224448 |
申请日期 |
1994.04.07 |
| 申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
KUEHLING, STEFFEN;KAUTH, HERMANN;ALEWELT, WOLFGANG |
| 分类号 |
C08G64/14;C08G64/20;C08G64/30;C08G64/42;(IPC1-7):C08G64/00 |
主分类号 |
C08G64/14 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
