发明名称 |
Process for producing a porous polyimide by removing low molecular weight substance using supercritical carbon dioxide |
摘要 |
<p>A method of efficiently removing a low molecular weight substance from a polyimide precursor or polyimide in which the low molecular weight substance is dispersed as micro-domains, without using a large amount of an organic solvent. The method of removing a low molecular weight substance comprises subjecting either a polymer composition having a micro-domain structure made up of a continuous phase comprising a polyimide precursor and, dispersed therein, a discontinuous phase comprising a low molecular weight substance or a polyimide composition obtained from the polymer composition by converting the polyimide precursor into a polyimide to extraction with a combination of supercritical carbon dioxide and a co-solvent to thereby remove the low molecular weight substance. The co-solvent is preferably an aprotic polar solvent, more preferably a nitrogen compound solvent or a sulfur compound solvent.</p> |
申请公布号 |
EP1211280(B1) |
申请公布日期 |
2004.09.15 |
申请号 |
EP20010128071 |
申请日期 |
2001.11.26 |
申请人 |
NITTO DENKO CORPORATION |
发明人 |
KANADA, MITSUHIRO;YAMAMOTO, TAKAYUKI;MOCHIZUKI, AMANE;FUKUOKA, TAKAHIRO |
分类号 |
C08J9/28;C08G73/10;C08J9/26;H05K1/03;(IPC1-7):C08J9/28 |
主分类号 |
C08J9/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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