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Hiroshi Makino, Yoshihiro Kusuki, Takashi Harada, Hiroshi Shimazaki, Tosio Isida: Aromatic polyimide composite separating membrane. UBE, Burgess Ryan & Wayne, July 9, 1985: US04528004 (59 worldwide citation)

An aromatic polyimide composite membrane having a satisfactory gas-permeating property and an excellent gas-separating property comprises an aromatic polyimide porous membrane substrate and at least one coating layer which has been prepared (A) by coating at least one surface of the substrate with a ...


2
Hiroshi Makino, Yoshihiro Kusuki, Takashi Harada, Hiroshi Shimazaki, Tosio Isida: Porous aromatic imide polymer membrane and a process for its manufacture. UBE, Burgess Ryan & Wayne, April 23, 1985: US04512893 (59 worldwide citation)

A porous aromatic imide polymer membrane usable as a gas or liquid separator or concentrator is prepared by a process comprising the steps of:


3
Hiroshi Makino, Yoshihiro Kusuki, Takashi Harada, Hiroshi Shimazaki, Tosio Isida: Process for producing aromatic polyimide composite separating membrane. Ube, Burgess Ryan & Wayne, April 3, 1984: US04440643 (51 worldwide citation)

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 aci ...


4
Hiroshi Makino, Yoshihiro Kusuki, Takashi Harada, Hiroshi Shimazaki, Tosio Isida: Process for producing porous aromatic polyimide membranes. Ube, Burgess Ryan & Wayne, October 2, 1984: US04474662 (45 worldwide citation)

A porous membrane of an aromatic polyimide having an enhanced permeability of a gas or liquid is produced by a process comprising the steps of


5
Hiroshi Makino, Yoshihiro Kusuki, Takashi Harada, Hiroshi Shimazaki, Tosio Isida: Aromatic polyimide gas-separating membrane. UBE, Burgess Ryan & Wayne, October 2, 1984: US04474858 (35 worldwide citation)

An aromatic polyimide membrane having an excellent gas-separating property comprises (A) a substrate consisting of a porous membrane comprising at least one aromatic polyimide having at least 80 molar % of at least one type of recurring unit of the formula (I): ##STR1## wherein R is a tetravalent ar ...


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Hiroshi Makino, Yoshihiro Kusuki, Takashi Harada, Hiroshi Shimazaki, Tosio Isida: Process for modifying porous polymeric membrane. Ube, Burgess Ryan & Wayne, December 4, 1984: US04486376 (19 worldwide citation)

A modified polymeric membrane having an excellent separating property is produced by applying, to a porous polymeric membrane, a volatile treating liquid containing a modifying agent which consists of at least one member selected from: