Patents
A novel class of tetra and triesters are prepared by reacting ricinoleic acid methyl ester with dibasic acids (C6,8,io)- The carboxylic acid moiety present in triesters was esterified with different alcohols with varying chain length. All the products were characterized by *H NMR, 13CNMR, FT-IR, and ESI-MS analysis and evaluated for their physico-chemical properties like acid value, density and lubricant properties namely viscosity, viscosity index (V.I), pour point and oxidation stability by Differential Scanning Calorimeter. The products exhibited very low pour points (-48 to <-60°C) and high viscosity index (131 to 182) and are useful as lubricant basestocks for environmentally friendly industrial oils and automotive applications.