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IONIC LIQUIDS CONTAINING SYMMETRIC QUATERNARY PHOSPHONIUM CATIONS AND PHOSPHORUS-CONTAINING ANIONS, AND THEIR USE AS LUBRICANT ADDITIVES

United States Patent Application

20150232777
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
An ionic liquid composition having the following generic structural formula: ##STR00001## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are equivalent and selected from hydrocarbon groups containing at least three carbon atoms, and X.sup.- is a phosphorus-containing anion, particularly an organophosphate, organophosphonate, or organophosphinate anion, or a thio-substituted analog thereof containing hydrocarbon groups with at least three carbon atoms. Also described are lubricant compositions comprising the above ionic liquid and a base oil, wherein the ionic liquid is dissolved in the base oil. Further described are methods for applying the ionic liquid or lubricant composition onto a mechanical device for which lubrication is beneficial, with resulting improvement in friction reduction, wear rate, and/or corrosion inhibition.
Qu, Jun (Oak Ridge, TN), Luo, Huimin (Knoxville, TN)
UT-BATTELLE, LLC (Oak Ridge TN)
14/ 184,754
February 20, 2014
[0001] This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.