| 发明名称 |
METHOD FOR EXTRUDER DEVOLATILIZATION OF SPIRO (BIS) INDANE POLYCARBONATES |
| 摘要 |
RD-19160 METHOD FOR EXTRUDER DEVOLATILIZATION OF SPIRO(BIS) INDANE POLYCARBONATES Spiro(bis)indane polycarbonates, including homoand 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 |
CA2017479(A1) |
申请公布日期 |
1991.02.28 |
| 申请号 |
CA19902017479 |
申请日期 |
1990.05.24 |
| 申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
SCHMIDT, LAWRENCE R.;CARAHER, JOEL M.;MAXAM, JOHN L. |
| 分类号 |
B29B13/02;B29C47/76;C08G64/40;(IPC1-7):B29C47/38 |
主分类号 |
B29B13/02 |
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