Cation exchange polyimide resin and use thereof

Details Cation exchange polyimide resin and use thereof Cation exchange polyimide resin and use thereof

1991-06-04

1992-10-20

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

210660, 210661, 210681, 521 26, 521 27, 521 32, 525420, 525424, 525436, 528353, C08J 520, C08J 522

Patent

active

051570556

ABSTRACT:
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): ##STR1## wherein R.sup.1 is a tetravalent organic group, and R.sup.2 is a bivalent organic group, which is capable of trapping cations from organic solvents.

REFERENCES:
patent: 3410826 (1968-11-01), Endrey
patent: 3771966 (1973-11-01), Hutson

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