| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel asymmetric membrane formed of an Si atom containing polyimide. SOLUTION: This invention relates to the asymmetric membrane formed of an Si atom containing polyimide of which the diamine component residual group of 3-28 mol% is expressed by a formula (2), (wherein X is an ether group or a phenylene group, R<SB>1</SB>and R<SB>2</SB>are a 1-5C alkylene group or a phenylene group, R<SB>3</SB>-R<SB>6</SB>are a 1-5C alkylene group or a phenyl group, n is the integer of 1-5 and the phenylene group and the phenyl group may have a substituted group). COPYRIGHT: (C)2008,JPO&INPIT
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