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US 11,680,218 B2Granted
Biodegradable lubricant with tailored hydrolytic stability and improved thermal stability through alkoxylation of glycerol
AssigneeTetramer Technologies, LLC
InventorsZachary J. Hunt, Benjamin F. Bergmann, Monika Mujkic, Jeffrey R. DiMaio
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Abstract
Described herein are methods of stabilizing the beta hydrogen of glycerol based esters by the insertion of alkoxy groups to significantly improve the thermal, oxidative, and hydrolytic stability of the ester and allow for controlling the molar density of esters bonds in the lubricants to maximize hydrolytic stability while maintaining biodegradability and further improving performance properties.
Claims20
A synthetic ester base oil comprising:
- greater than 5 percent by weight a fully esterified reaction product of:
- an alkoxylated glycerol with an average degree of alkoxylation ≥3 wherein at least one alkoxylate is a propoxylate or a butoxylate repeat unit;
- and
- at least one fatty acid having ≥8 carbon atoms.
1 more element
Dependencies are inferred from the claim text.