Polyimide membranes and their use for gas separation

Details Polyimide membranes and their use for gas separation Polyimide membranes and their use for gas separation

C - Chemistry, Metallurgy

08

J

183/1, 18/27

C08J 9/28 (2006.01) B01D 53/22 (2006.01) B01D 71/64 (2006.01) C08G 73/10 (2006.01)

Patent

CA 2024626

PATENT 173PUS04111 ABSTRACT The present invention is a class of polyimide membranes wherein the diamine portion of the polymer structure is formed from 2 5-di-t-butyl-1 4- phenylenediamine. Membranes formed from polyimides containing this diamine structure exhibit unexpectedly high gas permeability properties and are especially useful for separating oxygen from nitrogen or air.

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