Hedman, Casella, Gibson & Costigan
Polyamide-imide resin compositions and electrical conductors insulated therewith
 Novel polyamide-imide resin compositions, useful for electrically insulating conductors, are prepared by polycondensing a tribasic acid anhydride compound and a diisocyanate in an inert organic solvent in the presence of a catalytic amount of an oxyanion or amine compound at a high solids content, and controlling the reaction to prevent a great increase in viscosity. 
General Electric Company
C Y H C Y
C08G Y10T H01B C08G Y10T
inventional additional inventional inventional additional
Yue-Guey L.
Lee