Final rept. 8 Jul 1950-7 Aug 1952
STANDARD OIL DEVELOPMENT CO ELIZABETH NJ
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This report is a compilation of all the information obtained wider Contract No. AF 33038-14593, concerned with means of increasing the availability of synthetic lubricants for use at low and high temperatures. The diesters of straight-chain dibasic acids lead the field of esters mutable as lubricants for use at both low and high temperatures, because of their desirable combinations of properties and potentially good availability. Adipic, azelaic, and sebacic acids are the most readily available dibasic acids suitable for ester lubricant production, while the petroleum derived Oxo alcohols appear to be the most available alcohols for this application. In addition, however, certain diesters of polypropylene glycols appear equivalent to dibasic acid esters in all the characteristics studied so far, and this type of ester therefore represents a promising source of synthetic oil. Mono-esters may be satisfactory lubricants where high temperatures are not encountered. The presence of small quantities of impurities are believed to cause variations in the oxidation and thermal stability of esters. The SAE E.P. lubricants tester is capable of measuring the load-carrying ability of synthetic lubricants, but further work is required to develop a completely reliable test for predicting full-scale gear performance.
- Lubricants and Hydraulic Fluids