Method of manufacturing a polyimide-type gas permeation membrane

Details Method of manufacturing a polyimide-type gas permeation membrane Method of manufacturing a polyimide-type gas permeation membrane

1995-10-17

1997-11-25

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264 464, 264129, 26417124, 427245, 4274124, B29C 4700, B29C 4706, B29C 6720, B29C 7068

Patent

active

056908709

ABSTRACT:
Polyimide resin dope having at least three fluorine atoms in a repeating molecular unit and an organic solvent (A) are extruded in a tube form or coating the dope on a supporting body. The polyimide resin dope is then immersed in a solvent (B), which the organic solvent (A) is miscible with the solvent (B). Thus, a polyimide-type gas separation membrane including fluorine is virtually defect free in the skin layer, and manufactured cost-effectively by a simple manufacturing method.

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