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

摘要

An ionic liquid composition having the following generic structural formula:;;wherein R1, R2, R3, and R4 are equivalent and selected from hydrocarbon groups containing at least three carbon atoms, and X− 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.

主权项

1. An ionic liquid composition having the following generic structural formula:wherein R1, R2, R3, and R4 are equivalent and selected from hydrocarbon groups containing at least three carbon atoms, and X− is a phosphorus-containing anion having the following generic structural formula:wherein R5 and R6 are independently selected from hydrocarbon groups having at least three carbon atoms, wherein the hydrocarbon groups are optionally substituted with one or more fluorine atoms, and R5 and R6 may optionally interconnect to form a ring; X1, X2, W, and Y are independently selected from O and S atoms; and subscripts r and s are independently selected from 0 and 1.