IONIC LIQUIDS CONTAINING QUATERNARY AMMONIUM AND PHOSPHONIUM CATIONS, AND THEIR USE AS ENVIRONMENTALLY FRIENDLY LUBRICANT ADDITIVES
申请人:UT-Battelle, LLC
公开号:US20220033423A1
公开(公告)日:2022-02-03
An ionic liquid composition having the following generic structural formula:
wherein Z is N or P, and R
1
, R
2
, R
3
, and R
4
are independently selected from hydrogen atom and hydrocarbon groups having one to four carbon atoms with optional interconnection to form a cyclic group that includes Z, and wherein R
1
, R
2
, R
3
, and R
4
are all hydrocarbon groups when Z is P, and X
−
is a phosphorus-containing or carboxylate 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 lubricant, wherein the ionic liquid is dissolved in the base lubricant. 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.