04440643 is referenced by 51 patents and cites 4 patents.

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.degree. 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.degree. C. or more so as to convert the polyamic acid layer to the corresponding polyimide layer.

Title
Process for producing aromatic polyimide composite separating membrane
Application Number
6/387493
Publication Number
4440643
Application Date
June 11, 1982
Publication Date
April 3, 1984
Inventor
Tosio Isida
Ichihara
JP
Hiroshi Shimazaki
Ichihara
JP
Takashi Harada
Ichihara
JP
Yoshihiro Kusuki
Ichihara
JP
Hiroshi Makino
Ichihara
JP
Agent
Burgess Ryan & Wayne
Assignee
Ube
JP
IPC
B05D 3/02
B01D 39/14
B01D 39/00
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