Lubricants from Mixed Pentaerythritol Esters of 2-Ethylhexanoic and Isostearic Acids

Abstract

A mixed pentaerythritol ester composed of 25 mole percent 2-ethylhexanoic and 75 mole percent of isostearic acid substituents was synthesized and characterized. By means of the synthetic and analytical procedures developed, this mixed ester can be prepared in a highly reproducible manner. Oxidation and thermal stabilities, corrosivity, and wetting characteristics are reported. The ester is of interest in instrument and bearing applications where a viscous lubricant having excellent low-temperature properties is required.