Ionic liquid containing divalent cation and monovalent anion and lubricant composition comprising same

Patent metadata

Field	Value
Publication number	US-11091718-B2
Application number	US-202016934239-A
Country	US
Kind code	B2
Filing date	Jul 21, 2020
Priority date	Sep 20, 2019
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

Disclosed are an ionic liquid, having wear resistance maintained at low temperatures and containing a divalent cation including at least one of bis(ammonium) and bis(phosphonium) and a monovalent anion including at least one of sulfonate and phosphate, and a lubricant composition including the ionic liquid.

First claim

What is claimed is:

1. An ionic liquid, comprising:
a divalent cation comprising at least one of bis(ammonium) and bis(phosphonium); and
a monovalent anion comprising sulfonate
wherein the sulfonate has a structure of Chemical Formula 6 below:

wherein in Chemical Formula 6, R 1 and R 2 are each independently hydrogen, (C1-C20)hydrocarbyl, substituted (C1-C20)hydrocarbyl, (C1-C20)heterohydrocarbyl, or substituted (C1-C20)heterohydrocarbyl.

2. The ionic liquid of claim 1 , wherein the bis(ammonium) has a structure of Chemical Formula 1 below:

in Chemical Formula 1, R 1 and R 2 are each independently hydrogen, (C1-C20)hydrocarbyl, substituted (C1-C20)hydrocarbyl, (C1-C20)heterohydrocarbyl, or substituted (C1-C20)heterohydrocarbyl, and
R 3 is (CH 2 ) n , where 1≤n≤20.

3. The ionic liquid of claim 2 , wherein in Chemical Formula 1, R 1 and R 2 are each independently (C1-C20)alkyl, (C2-C20)alkenyl, (C2-C20)alkynyl, (C3-C7)cycloalkyl, (C5-C20)heteroalkyl, (C6-C20)aryl, (C6-C20)ar(C1-C10)alkyl, (C1-C10)alkoxy, (C6-C20)aryloxy, (C1-C10)alkoxycarbonyl(C1-C20)alkyl, or (C1-C20)alkylcarbonyl.

4. The ionic liquid of claim 2 , wherein in Chemical Formula 1, R 1 and R 2 are each independently (C1-C8)alkyl, and R 3 is (CH 2 ) n , where 1≤n≤12.

5. The ionic liquid of claim 1 , wherein the bis(phosphonium) has a structure of Chemical Formula 2 below:

in Chemical Formula 2, R 1 and R 2 are each independently hydrogen, (C1-C20)hydrocarbyl, substituted (C1-C20)hydrocarbyl, (C1-C20)heterohydrocarbyl, or substituted (C1-C20)heterohydrocarbyl, and
R 3 is (CH 2 ) n , where 1≤n≤20.

6. The ionic liquid of claim 5 , wherein in Chemical Formula 2, R 1 and R 2 are each independently (C1-C20)alkyl, (C2-C20)alkenyl, (C2-C20)alkynyl, (C3-C7)cycloalkyl, (C5-C20)heteroalkyl, (C6-C20)aryl, (C6-C20)ar(C1-C10)alkyl, (C1-C10)alkoxy, (C6-C20)aryloxy, (C1-C10)alkoxycarbonyl(C1-C20)alkyl, or (C1-C20)alkylcarbonyl.

7. The ionic liquid of claim 5 , wherein in Chemical Formula 2, R 1 and R 2 are each independently (C1-C8)alkyl, and R 3 is (CH 2 ) n , where 1≤n≤12.

8. The ionic liquid of claim 1 , wherein in Chemical Formula 6, R 1 and R 2 are each independently (C1-C20)alkyl, (C2-C20)alkenyl, (C2-C20)alkynyl, (C3-C7)cycloalkyl, (C5-C20)heteroalkyl, (C6-C20)aryl, (C6-C20)ar(C1-C10)alkyl, (C1-C10)alkoxy, (C6-C20)aryloxy, (C1-C10)alkoxycarbonyl(C1-C20)alkyl, or (C1-C20)alkylcarbonyl.

9. The ionic liquid of claim 1 , wherein in Chemical Formula 6, R 1 and R 2 are each independently (C3-C10)alkyl.

10. A lubricant composition, comprising:
the ionic liquid of claim 1 ;
at least one additive; and
a base oil.

11. The lubricant composition of claim 10 , comprising 0.05 to 20 wt % of the ionic liquid and 0.1 to 50 wt % of the at least one additive.

12. The lubricant composition of claim 11 , wherein the at least one additive is at least one selected from the group consisting of an antioxidant, a metal cleaner, an anticorrosive agent, a foam inhibitor, a pour point depressant, a viscosity modifier, a dispersant and an antiwear agent.

Assignees

• Sk Innovation Co Ltd
• Sk Lubricants Co Ltd

Inventors

• Shin Sang Hye
• Song Ha Na
• Shim Yu Na
• Hwang Sun Ae

Classifications

• C10N2020/02

  Viscosity; Viscosity index · CPC title

• C07F9/11

  with hydroxyalkyl compounds without further substituents on alkyl · CPC title

• C10M137/12

  having a phosphorus-to-carbon bond · CPC title

• C10M135/10 Primary

  Sulfonic acids or derivatives thereof · CPC title

• C07C309/17

  containing carboxyl groups bound to the carbon skeleton · CPC title