Study of syntheslsed ecofrlendly and biodegradable esters: tire resistance and lubricating properties

Hydraulicfluids based on minerai oils, though hEWean optimum performance and technical requirements as specified inthe s1andards for hydraulicoils, failto meet toxicityand biodegradabilityrequirements. Synthetic esters are knaNn to have better biodegradability, I.oYierinflammability,better lubricity an~ fluidity,lower voIatiUtyand higher thermal and oxidation stability in comparison to mineral oils. These properties can be further enhanced through molecular design to suit the practicaf applications. Therefore, synthetic esters appear as promising candidates where environmental protection is of utmost importance. Polyol and carboxylicacids (CcrC1~both pure and their mixtures, were used for synthesizing esters. The products were characterized for their physico-chemical properties and evaluated for their lubrication performance. These were then compared with VG-22 grade fire resistant hydraulic fluids (FRHF). The paper deals withthe synthesis, characterization, and evaluation of the esters and cfiscusses their potential use as FRHF