| 发明名称 |
Method for extruder devolatilization of spiro (bis) indane polycarbonates. |
| 摘要 |
Spiro(bis)indane polycarbonates, including homo- and copolycarbonates, are devolatilized by extrusion under conditions of low viscous dissipation and low residence time. By this method, volatile impurities including spiro(bis)indane cyclic dimer may be removed.
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| 申请公布号 |
EP0415074(A2) |
申请公布日期 |
1991.03.06 |
| 申请号 |
EP19900114055 |
申请日期 |
1990.07.23 |
| 申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
SCHMIDT, LAWRENCE RAYMOND;CARAHER, JOEL MATTHEW;MAXAM, JOHN LESTER |
| 分类号 |
B29B13/02;B29C47/76;C08G64/40 |
主分类号 |
B29B13/02 |
| 代理机构 |
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