VERWENDUNG EINES POLYIMIDKATIONENAUSTAUSCHERHARZES.

摘要

A cation exchange polyimide resin having resistance to organic solvents which contains polyamidocarboxylic acid units providing sites of ion exchange and represented by the formula (I): wherein R<1> is a tetravalent organic group, and R<2> is a bivalent organic group, which is capable of trapping cations from organic solvents.