Any of a group of nitrogen compounds derived by reaction of 1,1-dimethylhydrazine with an epoxide in the presence of an ester of a carboxylic acid. A number of types of epoxides and esters may be used, providing a wide variety of products, including short- and long-chain aliphatics and aromatics. Their major uses are in tire-cord dips to increase adhesion of cord to rubber, in soil-removing detergents (nonionic), in coating formulations, and in cosmetic creams and shampoos. They are stated to be biodegradable and without toxic hazard. They also have elastomer and cross-linking applications from adhesives, caulks, and sealants to foams and mechanical goods. As isocyanate precursors, aminimides can be prepared in a large number of structural variations. Bisaminimides are especially valuable for producing stable, single-package prepolymer compositions for in situ generation of isocyanates in polyurethane applications.