Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1991-11-26
1993-11-16
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528125, 528126, 528128, 528172, 528173, 528179, 528180, 528181, 528182, 528183, 528185, 528188, 528207, 528208, 528351, 528352, C08G 7310, C08G 6926, C08G 802
Patent
active
052625168
ABSTRACT:
A process for preparing a polyetherimide-polyimide copolymer by (a) reacting a bis (ether anhydride) with a stoichiometric excess of an organic diamine in an inert, non-polar solvent to form an amine-terminated oligomer-solvent mixture; (b) removing unreacted organic diamine from the oligomer-solvent mixture; and (c) reacting the oligomer with an aromatic dianhydride.
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General Electric Company
Hampton-Hightower P.
Kight III John
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