Title:
【発明の名称】中空繊維不整ガス分離膜の形成方法
Document Type and Number:
Japanese Patent JP2566973
Kind Code:
B2
Abstract:
A process and dope are disclosed for forming high free volume, asymmetric gas separation membranes having graded density skins and macrovoid-free morphology from a solvent system comprising a Lewis acid, Lewis base, and a Lewis acid:base complex which dissolve hydrophobic polymers. The dopes have high total solids, high viscosity and low coagulation (g) values which enhance rapid gelation without the formation of macrovoids and which minimize densification. The dope solvent system complexes are readily disassociated by the coagulation medium and the component molecules are miscible in the medium which provides for rapid desolvation of the formed membrane thus providing a membrane having low residual solvent retention.
Inventors:
ROBAATO EMIRU KESUTEINGU
ARUFURETSUDO KEISU FURITSUTSUSHE
REIMONDO FURANSHISU MARON
MIRUTON KEISU MAAFUI
AREN KAARU HANDAAMAN
KURINTO AREN KURUUZU
ARUFURETSUDO KEISU FURITSUTSUSHE
REIMONDO FURANSHISU MARON
MIRUTON KEISU MAAFUI
AREN KAARU HANDAAMAN
KURINTO AREN KURUUZU
Application Number:
JP20335487A
Publication Date:
December 25, 1996
Filing Date:
August 15, 1987
Export Citation:
Assignee:
PERMEA INC
International Classes:
B01D67/00; B01D69/08; B01D71/68; C08J3/09; B01D53/22; (IPC1-7): B01D53/22; B01D69/08; B01D71/68
Domestic Patent References:
| JP60172312A |
Attorney, Agent or Firm:
Akira Asamura (2 outside)