초록 ▼

Useful gas separation membranes made from aromatic polyimides which comprise pendant nitro groups incorporated onto the phenyl backbone of the polymer. These polymers may be synthesized by the aryl nitration of the unsubstituted polyimides, or from the condensation reaction of aromatic diamines cont

Useful gas separation membranes made from aromatic polyimides which comprise pendant nitro groups incorporated onto the phenyl backbone of the polymer. These polymers may be synthesized by the aryl nitration of the unsubstituted polyimides, or from the condensation reaction of aromatic diamines containing pendant nitro groups with aromatic dianhydrides, and are particularly useful in air separation.

대표청구항 ▼

[ I claim:] [1.] A gas separation membrane formed from an aryl-nitrated aromatic polyimide wherein the polyimide backbone comprises at least one repeating unit of the formula: [ STR 8 ] where --Ar-- is an aromatic diamine moiety, and [ STR 9 ] or mixtures thereof; and Z is [ STR 10 ] or mixtures the

[ I claim:] [1.] A gas separation membrane formed from an aryl-nitrated aromatic polyimide wherein the polyimide backbone comprises at least one repeating unit of the formula: [ STR 8 ] where --Ar-- is an aromatic diamine moiety, and [ STR 9 ] or mixtures thereof; and Z is [ STR 10 ] or mixtures thereof.