Published May 2026, Pg. 56-61

Section: Oil refining and petroleum chemistry

UOT: 547.431·5:621.892

DOI: 10.37474/0365-8554/2026-05-56-61

Esters of 2.2-dimethylolpropane as a base and component of new lubricating oils

H.N. Gurbanov Dr. in Ch. Sc. - Institute of Petrochemical Processes

A.T. Sharifov - Institute of Petrochemical Processes

Symmetrical and unsymmetrical esters of 2,2-dimethylolpropane (neopentyl glycol, NPG) with aliphatic monocarboxylic acids C6–C9 were synthesized, and their physicochemical properties, viscosity–temperature characteristics, thermo-oxidative stability (TOS), and lubricating properties were investigated. It was found that these esters possess a relatively moderate viscosity at positive temperatures (3.62–4.65 mm²/s at 
100 oC), a high flash point (186–223 oC), a high viscosity index (125–132), a low pour point (−58 to −65 oC), and satisfactory low-temperature viscosity–temperature characteristics (2470–3250 mm²/s at −40 oC).
The lubricating properties of the esters were also studied: the critical load Pk is 650–800 N, and the wear scar diameter Dy = 0.50–0.65 mm at a load P=196 N. In the obtained esters, the relationship between molecular structure and performance properties was systematically investigated, and certain regularities were established.
It was also shown that these esters meet all the requirements for low-viscosity aviation oils and surpass them in some parameters. Therefore, they are recommended as base stocks and components for new aviation oils.

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