E.i. Dupont De Nemours and Company

Bruce B Johnson

Brian C Auman

David P Higley

Perfluoroalkylated diaminoesitylene and polymers, preferably polyimides, made therefrom. The necessarily obtainable meta-substitution position of the perfluoroalkyl group with respect to both amino-groups provides an improved diamine and compositions of matter resulting therefrom.

Perfluoroalkylated diaminomesitylene and polyimides therefrom

A cation exchange membrane is disclosed comprising fluorinated polymer layers which include, in order, a layer with sulfonic exchange groups, a layer with carboxylic exchange groups, and a thinner layer with carboxylic exchange groups at a greater exchange capacity than the other carboxylic layer.

Growing community of inventors

Wallingford, PA, United States of America

Bruce B Johnson