Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins
Patent
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
Akagi Yoshiro
Asahina Hideo
Inoue Atsuhisa
Ishino Mariko
Kaminishi Shigeru
Schofer Joseph L.
Sharp Kabushiki Kaisha
Zitomer Fred
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