Lubricant for a marine engine

Patent metadata

Field	Value
Publication number	US-11845905-B2
Application number	US-202017775393-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 7, 2019
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A lubricant for marine engine, notably for a two-stroke marine engine. More particularly, a lubricant for a marine engine including at least one lubricant base oil and at least one di-alkylaminopolyalkylamine.

First claim

The invention claimed is:

1. Lubricant composition comprising:
at least one lubricant base oil,
at least one di-alkylaminopolyalkylamine responding to formula (I):

wherein,
R1, R2 represent, independently, an alkyl moiety with 1 to 3 carbon atoms, which is linear or branched,
n and m are integers representing, independent of each other either 1, 2, or 3,
and
the total number of carbon atoms in formula (I) is from 4 to 10.

2. The lubricant composition according to claim 1 , wherein in formula (I), R1=R2=CH 3 .

3. The lubricant composition according to claim 1 , wherein the di-alkylaminopolyalkylamine (I) responds to formula (IA):

wherein R1, R2 represent, independently, an alkyl moiety with 1 or 2 carbon atoms.

4. The lubricant composition according to claim 1 , wherein the di-alkylaminopolyalkylamine responding to formula (I) is dimethylaminopropylaminopropylamine (DMAPAPA):

5. The lubricant composition according to claim 1 , wherein the percentage by weight of di-alkylaminopolyalkylamine of formula (I), relative to the total weight of lubricant composition is chosen such that the BN provided by the di-alkylaminopolyalkylamine of formula (I) represents a contribution of at least 0.1 milligrams of potash per gram of lubricant, relative to the total BN of said lubricant.

6. The lubricant composition according to claim 1 , wherein the percentage by weight of di-alkylaminopolyalkylamine of formula (I), relative to the total weight of the lubricant composition ranges from 0.05 to 10%.

7. The lubricant composition according to claim 1 , wherein it comprises:
from 90.00 to 99.95% of at least one base oil,
from 0.05 to 10.00% of at least one di-alkylaminopolyalkylamine of formula (I), the percentages being defined by weight of component as compared to the total weight of the composition.

8. The lubricant composition according to claim 1 , wherein it comprises at least one detergent (Det) selected from neutral and overbased detergents having a Total Base Number according to ASTM D2896 of from 20 to 500 mg KOH/g.

9. The lubricant composition of claim 8 , wherein it comprises from 1 to 35% weight of neutral and overbased detergents, with regards to the total weight of the lubricant composition.

10. The lubricant composition of claim 9 , wherein it comprises:
from 60.0 to 98.5% of at least one base oil,
from 0.5 to 5.0% of at least one amine of formula (I),
from 1.0 to 35.0% of at least one detergent selected from neutral and overbased detergents having a Total Base Number according to ASTM D2896 of from 20 to 500 mg KOH/g
the percentages being defined by weight of component as compared to the total weight of the composition.

11. The lubricant composition according to claim 1 , which has a Total Base Number (TBN) value according to ASTM D2896 of above 10 mg KOH/g.

12. The lubricant composition according to claim 1 , which has a kinematic viscosity at 100° C. superior or equal to 5.6 mm 2 /s and inferior or equal to 26.1 mm 2 /s.

13. A method for lubricating a marine engine, comprising operating the engine with the lubricant composition according to claim 1 .

14. The method for lubricating a marine engine according to claim 13 , wherein the marine engine is a two stroke marine engine.

15. The method for lubricating a marine engine according to claim 13 , wherein the lubricant composition is applied to a cylinder wall of the marine engine.

16. The method for lubricating a marine engine according to claim 15 , wherein the lubricant composition is applied to the cylinder wall of the marine engine by a pulse lubricating system or by spraying the lubricant composition onto a piston's rings pack through an injector.

Assignees

• Totalenergies Onetech

Inventors

• Doyen Valérie
• De Feo Modestino
• Chao Gregory

Classifications

• C10M105/60 Primary

  having amino groups bound to an acyclic or cycloaliphatic carbon atom · CPC title

• C10M169/045 Primary

  the additives being a mixture of compounds of unknown or incompletely defined constitution and non-macromolecular compounds · CPC title

• C10M2207/028

  Overbased salts thereof · CPC title

• C10M2207/26

  Overbased carboxylic acid salts · CPC title

• C10M2215/04

  having amino groups bound to acyclic or cycloaliphatic carbon atoms · CPC title