Basic ashless additives

Patent metadata

Field	Value
Publication number	US-9783756-B2
Application number	US-201314440985-A
Country	US
Kind code	B2
Filing date	Oct 28, 2013
Priority date	Nov 7, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A lubricant composition comprising an oil of lubricating viscosity and an N-hydrocarbyl-substituted γ-aminoester or γ-aminothioester, wherein the N-hydrocarbyl substituent comprises a hydrocarbyl group of at least 3 carbons atoms, with a branch at the 1 or 2 position of the hydrocarbyl chain, provides exhibits basicity and good seal performance.

First claim

What is claimed is:

1. A lubricant composition comprising an oil of lubricating viscosity and an N-monohydrocarbyl-substituted γ-aminoester;
wherein the N-monohydrocarbyl-substituted γ-aminoester comprises a 2-((hydrocarbyl)aminomethyl) succinic acid dihydrocarbyl ester.

2. The lubricant composition of claim 1 wherein the ester functionality comprises a hydrocarbyl group having 1 to about 30 carbon atoms.

3. The lubricant composition of claim 1 wherein the ester functionality comprises an alcohol-derived group which is an ether-containing group.

4. The lubricant composition of claim 1 wherein the two hydrocarbyl groups of the ester functionalities are alkyl moieties which are the same or different and have 1 to about 18 carbon atoms.

5. The lubricant composition of claim 1 wherein the N-monohydrocarbyl-substituted γ-aminoester is represented by the formula

wherein R 2 and R 3 are independently alkyl groups of 1 to about 6 carbon atoms and R 4 and R 7 are independently alkyl groups of 1 to about 12 carbon atoms.

6. The lubricant composition of claim 1 further comprising at least one of detergents, dispersants, antioxidants, or zinc dialkyldithiophosphates.

7. The lubricant composition of claim 1 wherein the N-mono-hydrocarbyl-substituted γ-aminoester is present in an amount of about 0.5 to about 5 percent by weight.

8. A method for lubricating a mechanical device, comprising supplying thereto the lubricant composition of claim 1 .

9. A method for preparing an N-monohydrocarbyl-substituted γ-aminoester; comprising reacting a primary amine having said hydrocarbyl group with an ethylenically unsaturated ester having ethylenic unsaturation between the β and γ carbon atoms thereof, optionally using a Zr-based catalyst and optionally in the presence of a protic solvent, at a temperature of about 10 to about 80° C.;
wherein the N-monohydrocarbyl-substituted γ-aminoester comprises a 2-((hydrocarbyl)aminomethyl) succinic acid dihydrocarbyl ester.

10. The lubricant composition of claim 1 wherein the N-monohydrocarbyl-substituted γ-aminoester is present in an amount of about 0.8 to about 4 percent by weight.

11. The lubricant composition of claim 1 wherein the N-monohydrocarbyl-substituted γ-aminoester is present in an amount of about 1 to about 3 percent by weight.

12. The lubricant composition of claim 2 wherein the ester functionality comprises an alcohol-derived group which contains 2 to 8 carbon atoms and is a branched aliphatic group.

13. The lubricant composition of claim 2 wherein the ester functionality comprises an alcohol-derived group which is isopropyl, iso-butyl, t-butyl, cyclohexyl, iso-octyl, or 2-ethylhexyl.

14. The lubricant composition of claim 1 wherein the two alcohol-derived groups of the ester functionalities each contain 2 to 8 carbon atoms and are branched aliphatic groups.

15. The lubricant composition of claim 1 wherein the N-monohydrocarbyl-substituted γ-aminoester is represented by the formula

wherein R 2 and R 3 are independently alkyl groups of 1 to about 6 carbon atoms and R 4 and R 7 are independently alkyl groups which each contain 2 to 8 carbon atoms and are branched alkyl groups.

Assignees

• Lubrizol Corp

Inventors

• Saccomando Daniel J
• Delbridge Ewan E
• Roumaneix Alexandre

Classifications

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• C10N2030/12

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

• C10N2030/36

  Seal compatibility, e.g. with rubber · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2030/52

  Base number [TBN] · CPC title