Ashless or reduced ash quaternary detergents

Patent metadata

Field	Value
Publication number	US-9890347-B2
Application number	US-201615288839-A
Country	US
Kind code	B2
Filing date	Oct 7, 2016
Priority date	Mar 3, 2009
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A composition of an oil-soluble ionic detergent that does not contribute metal ions to the composition, and which comprises a quaternary non-metallic pnictogen cation and an organic anion having at least one hydrocarbyl group of sufficient length to impart oil solubility to the detergent, the detergent having a total base number (TBN) to total acid number (TAN) ratio of at least 2:1 imparts ash-free basicity to a lubricant composition.

First claim

What is claimed is:

1. A composition comprising an oil-soluble ionic detergent, which detergent comprises
(a) a quaternary ammonium cation and
(b) an organic anion having at least one aliphatic hydrocarbyl group of sufficient length to impart oil solubility to the detergent;
said oil-soluble ionic detergent having a total base number (TBN) to total acid number (TAN) ratio of at least 2:1;
wherein said oil-soluble ionic detergent exhibits a TBN of at least about 10 arising from a non-metallic base;
wherein said oil-soluble ionic detergent comprises a stoichiometric excess of quaternary ammonium cations of (a) over organic anions of (b) such that said cations and anions are present in an equivalent ratio (a):(b) of at least about 2:1; and
wherein the overbased detergent further comprises an additional oxo-anion which comprises a carbonate, bicarbonate, or hydroxide ion;
wherein the cation comprises four groups selected from the group consisting of methyl groups, ethyl groups, propyl groups, butyl groups, benzyl groups, phenyl groups, hydroxyalkyl groups, aminoalkyl groups, and mixtures thereof.

2. The composition of claim 1 wherein the oil-soluble ionic detergent comprises a sulfonate, carboxylate, or phenate anion.

3. The composition of claim 1 wherein the oil-soluble ionic detergent has a TBN of about 50 to about 300 and a TAN of less than 10.

4. The composition of claim 1 wherein the oil-soluble detergent has a TBN:TAN ratio of about 7:1 to about 150:1.

5. The composition of claim 1 wherein the oil-soluble ionic detergent does not contribute metal ions to the composition.

6. A lubricant composition comprising an oil of lubricating viscosity and the oil-soluble ionic detergent of claim 1 .

7. The lubricant of claim 6 wherein the amount of the oil-soluble ionic detergent is about 0.1 to about 10 percent by weight.

8. The lubricant of claim 6 further comprising at least one dispersant, metal-containing detergent other than said oil-soluble ionic detergent, extreme pressure agent, anti-wear agent, antioxidant, friction modifier, viscosity modifier, metal salt of a phosphorus acid, corrosion inhibitor, antirust agent, antifoam agent, or mixtures thereof.

9. The lubricant of claim 6 further comprising a metal-containing detergent other than said oil-soluble ionic detergent.

10. The lubricant of claim 6 wherein the oil-soluble ionic detergent is substantially metal-free and contributes at least about 0.2 TBN to the lubricant.

11. A method for lubricating a mechanical device, comprising supplying thereto the lubricant of claim 6 .

Assignees

• Lubrizol Corp

Inventors

• Delbridge Ewan E
• Carrick Virginia A
• Pudelski John K
• Giesleman Matthew D
• Friend Christopher L
• Mosier Patrick E
• Rogers Michele M
• Tierney Mark T

Classifications

• C10N2030/45

  Ash-less or low ash content · CPC title

• C10N2030/42

  Phosphor free or low phosphor content compositions · CPC title

• C10N2030/43

  Sulfur free or low sulfur content compositions · CPC title

• C10N2020/077

  Ionic Liquids · CPC title

• C10N2010/04

  Groups 2 or 12 · CPC title