this invention generally relates to new polyol ester derivatives of polyamines for use as dispersant additives compatible in synthetic ester - based turbo oils . the dispersant additives of the present invention consist of a hydrocarbon acid , a polyol , an amine carrier such as diacid or cyclic anhydride and a polyamine . the hydrocarbon acid makes up the non - polar hydrocarbon portion of the dispersant and the polyamine functions as the polar headgroup . the diacid or cyclic anhydride provides a means for attaching the polar polyamine to the dispersant structure through an amide linkage . different dispersant structures are obtained by varying the hydrocarbon acid , the polyol and the nature of the polyamine .