| 发明名称 |
Method for manufacturing polyimide asymmetric membrane, and polyimide asymmetric membrane |
| 摘要 |
A process of producing an asymmetric membrane of multicomponent polyimide. The process includes the steps of (1) preparing a multicomponent polyimide blend solution by mixing a polyimide component A having a number-averaged polymerization index NA and a polyimide component B having a number-averaged polymerization index NB, wherein NA and NB satisfies equation 1: 2.35×NA−2.09<NB<450×NA−1.12 1 (2) subjecting the multicomponent polyimide blend solution to further polymerization and imidation reaction, and (3) causing a phase inversion in the resulting multicomponent polyimide blend solution to form an asymmetric membrane. The polyimide component A is raw materials of polyimide A containing a fluorine atom in the chemical structure thereof and/or a polymerization and imidation reaction product of the raw materials. The polyimide component B is raw materials of polyimide B and/or a polymerization and imidation reaction product of the raw materials.
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| 申请公布号 |
US7833313(B2) |
申请公布日期 |
2010.11.16 |
| 申请号 |
US20090606768 |
申请日期 |
2009.10.27 |
| 申请人 |
UBE INDUSTRIES, LTD. |
发明人 |
YOSHINAGA TOSHIMUNE;FUKUNAGA KENJI;KASE YOJI |
| 分类号 |
B01D53/22;B01D71/64;C01B3/56;C01B23/00;D01F6/94 |
主分类号 |
B01D53/22 |
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