초록 ▼

The present invention is a class of polyimide membranes wherein the diamine portion of the polymer structure is an alkylated bisaniline. The bridging group of the diamine possesses restricted, rotatable rigid, or low Van Der Waal energy substituents which are orthogonal to the polymer backbone. Thes

The present invention is a class of polyimide membranes wherein the diamine portion of the polymer structure is an alkylated bisaniline. The bridging group of the diamine possesses restricted, rotatable rigid, or low Van Der Waal energy substituents which are orthogonal to the polymer backbone. These polyamide membranes exhibit enhanced gas flux and are useful in various gas separation applications.

대표청구항 ▼

A semi-permeable membrane formed of a polyimide containing polymerizable units of the formula: [Figure] where each R1 is independently H, C1-C6 alkyl, or 1-arylalkyl; each R2 is independently C1-C6 alkyl, aryl, perhaloalkyl, or 1-arylalkyl; and A1 is a single bond, [Figure] wherein each R is indepen

A semi-permeable membrane formed of a polyimide containing polymerizable units of the formula: [Figure] where each R1 is independently H, C1-C6 alkyl, or 1-arylalkyl; each R2 is independently C1-C6 alkyl, aryl, perhaloalkyl, or 1-arylalkyl; and A1 is a single bond, [Figure] wherein each R is independently, CF3, CF2Cl, C1-C6 alkyl, phenyl, substituted phenyl or a halogen. A process for separating a component of a gas mixture containing at least one other component, said process comprising: bringing said gas mixture into contact with the membrane of claim 1 whereby one component selectively permeates through said membrane.