Lubricant including silicon-containing ionic liquid

Patent metadata

Field	Value
Publication number	US-10619117-B2
Application number	US-201615571929-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	May 11, 2015
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

Provided is a lubricant including a silicon-containing ionic liquid represented by formula (1).

(In the formula, R 1 represents an alkyl group having 1 to 10 carbon atoms, R 2 represents an alkyl group having 8 to 20 carbon atoms, and R 3 represents an alkyl group having 1 to 8 carbon atoms. Herein, it is provided that the number of carbon atoms in R 2 is greater than the number of carbon atoms in R 1 .)

First claim

The invention claimed is:

1. A lubricant consisting of a silicon-containing ionic liquid as a main component, and optionally at least one additive selected from the group consisting of surfactants, dispersants, antioxidants, anti-wear agents, rust inhibitors, corrosion inhibitors, friction modifiers, extreme pressure additives, antifoam agents, viscosity modifiers and pour point depressants,
wherein the silicon-containing ionic liquid has formula (1) below

wherein R 1 is an alkyl group of 1 to 10 carbon atoms, R 2 is an alkyl group of 8 to 20 carbon atoms and R 3 is an alkyl group of 1 to 8 carbon atoms, with the proviso that the number of carbon atoms in R 2 is higher than the number of carbons in R 1 , and
wherein when the at least one additive is present in the lubricant, a content of each of the at least one additive is from 0.1 to 10 wt % of the lubricant.

2. The lubricant of claim 1 , wherein R 2 is a linear alkyl group of 10 to 20 carbon atoms.

3. The lubricant of claim 1 , wherein all R 1 groups are n-butyl or n-hexyl groups.

4. The lubricant of claim 1 , wherein all R 3 groups are methyl groups.

5. The lubricant of claim 1 , wherein the additive is a friction modifier or an anti-wear agent.

6. The lubricant of claim 2 , wherein all R 1 groups are n-butyl or n-hexyl groups.

7. The lubricant of claim 2 , wherein all R 3 groups are methyl groups.

8. The lubricant of claim 3 , wherein all R 3 groups are methyl groups.

9. The lubricant of claim 1 , wherein the additive is a friction modifier selected from the group consisting of glycerol monooleate and oleyl amine, and a content of the friction modifier is 0.1-5 wt % of the lubricant, or an extreme pressure additive, and a content of the extreme pressure additive is 0.1-5 wt % of the lubricant.

Assignees

• Nisshinbo Holdings Inc

Inventors

• Minami Ichiro
• Masuda Gen

Classifications

• C10N2030/12

  Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10N2020/077

  Ionic Liquids · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C10M2223/0603

  used as base material · CPC title