| 发明名称 |
Ultrathin polyimide polymer films and their preparation |
| 摘要 |
Disclosed herein are free-standing, pinhole-free, ultrathin polyimide films having thicknesses of about 400 angstroms or less and a process to prepare them. The films find particular utility in separatory applications.
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| 申请公布号 |
US4880699(A) |
申请公布日期 |
1989.11.14 |
| 申请号 |
US19890339903 |
申请日期 |
1989.04.17 |
| 申请人 |
HOECHST CELANESE CORPORATION |
发明人 |
KOHN, RACHEL S. |
| 分类号 |
B01D69/12;B01D71/64;B29C41/00;B29C41/12;C08G73/10;C08J5/18 |
主分类号 |
B01D69/12 |
| 代理机构 |
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