Synthetic diester lubricating agents were prepared by esterification reactionof fatty acid such as lauric acid, myristic acid, palmitic acid and stearic acid with1,2-ethanediol and 1,2-propandiol using concentrated sulfuric acid as catalyst. Mostof the diester products were solid except diester form lauric acid with1,2-propanediol. The solid products were wax-like nature, and had good chemical andphysical properties, i.e., high flash point and good thermal and oxidationstabilities. These types of diester could be possible to use in various industrialapplications, for example, as emulsifier, antifoaming agent and friction modifier inprocessing polymer, cosmetic, pharmacy and lubricating technology.
