发明名称 |
Process for producing aromatic polyimide composite separating membrane |
摘要 |
An aromatic polyimide composite membrane having an excellent gas-separating property is produced by a process comprising the steps of: coating at least one surface of a substrate consisting of an aromatic polyimide porous membrane with a solution of 0.05% to 10% by weight of an aromatic polyamic acid in a polar organic solvent, which is not capable of dissolving the polyimide porous membrane, at a temperature not exceeding 140 DEG C.; after a during drying the resultant thin coating layer of the polyamic acid solution, heating the resultant polyamic acid layer at a temperature of 150 DEG C. or more so as to convert the polyamic acid layer to the corresponding polyimide layer.
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申请公布号 |
US4440643(A) |
申请公布日期 |
1984.04.03 |
申请号 |
US19820387493 |
申请日期 |
1982.06.11 |
申请人 |
UBE INDUSTRIES, LTD. |
发明人 |
MAKINO, HIROSHI;KUSUKI, YOSHIHIRO;HARADA, TAKASHI;SHIMAZAKI, HIROSHI;ISIDA, TOSIO |
分类号 |
B32B5/18;B01D53/22;B01D69/12;B01D71/64;B05D7/04;C08J9/28;(IPC1-7):B01D39/00;B01D39/14;B05D3/02 |
主分类号 |
B32B5/18 |
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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