04838900 is referenced by 41 patents and cites 29 patents.

Aromatic polyimide gas separation membranes of the formula: ##STR1## or mixtures thereof, --R'--is ##STR2## linear alkylene groups of the formula (CH.sub.2).sub.1-3 or mixtures thereof, where --R" is ##STR3## are independently primary or secondary alkyl groups having 1 to 6 carbon atoms preferably methyl, ethyl, or isopropyl --Z and --Z.sub.1 are independently hydrogen or halogens such as iodine, bromine or chlorine preferably chlorine, and where n=0-4.

Title
Polyimide gas separation membranes
Application Number
7/175503
Publication Number
4838900
Application Date
April 13, 1988
Publication Date
June 13, 1989
Inventor
Richard A Hayes
Hockessin
DE, US
Assignee
E I Du Pont De Nemours and Company
DE, US
IPC
B01D 53/22
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