Use of a fatty amine for preventing and/or reducing the metal losses of the parts in an engine

Patent metadata

Field	Value
Publication number	US-10738261-B2
Application number	US-201615750312-A
Country	US
Kind code	B2
Filing date	Aug 3, 2016
Priority date	Aug 3, 2015
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

One or more fatty amines are soluble in a lubricating composition for preventing and/or reducing the metal losses of the parts of an engine, such as a marine engine. The parts are brought into contact with the lubricating composition in order to prevent or reduce the metal losses.

First claim

What is claimed is:

1. A method of passivation of all or a part of a surface of metal parts of an engine, and of prevention and/or reduction of metallic losses of parts of an engine, comprising a step of applying on said parts of the engine a lubricating composition comprising one or more soluble fatty amines,
wherein the fatty amine comprises:
a mixture of one or more polyalkylamines of formulas (III) and/or (IV):

in which
R, identical or different, represents a linear or branched alkyl group comprising from 8 to 22 carbon atoms,
n and z, independently of each other, represent 0, 1, 2 or 3, and
o and p represent 0, 1, 2 or 3 independently of each other when z is greater than 0,

wherein the said mixture comprises at least 3% by weight of branched compounds, or derivatives thereof.

2. The method according to claim 1 , wherein the mixture of polyalkylamines of formulas (III) and/or (IV) comprises at least 5% by weight of compounds having a pure linear structure.

3. The method according to claim 1 , wherein the polyalkylamine mixture of formulas (III) and/or (IV) comprises at least 4% by weight of branched compounds so that at least n or z is greater than or equal to 1.

4. The method according to claim 1 , wherein the polyalkylamine mixture of formulas (III) and/or (IV) comprises at least polyalkylamines of formulas (III) and/or (IV) so that when n, o, p and z are not equal to 0, they are equal to 1 or 2.

5. The method according to claim 1 , wherein the polyalkylamine mixture of formulas (III) and/or (IV) comprises at least polyalkylamines of formulas (III) and/or (IV) for which n, o, p or z are independently 0, 1 or 2.

6. The method according to claim 1 , wherein the polyalkylamine mixture of formulas (III) and/or (IV) comprises at least polyalkylamines of formulas (III) and/or (IV) and their derivatives for which n, o, p or z independently represent 0, 1 or 2.

7. The method according to claim 1 , wherein the mixture of fatty amines of formulas (III) and/or (IV) represents from 0.1 to 15% by weight relative to the total weight of the lubricating composition.

8. The method according to claim 1 , for preventing and/or reducing metal losses of parts in a 2-stroke or 4-stroke marine engine, during the combustion of any type of fuel.

9. The method according to claim 1 , for preventing and/or reducing metal losses of parts in hot parts, including the piston-ring jacket zone, of a 2-stroke or 4-stroke marine engine, during the combustion of any type of fuel.

10. The method according to claim 1 , wherein the fuel oil has a sulfur content of less than 3.5% by weight relative to the total weight of the fuel oil.

Assignees

• Total Marketing Services

Inventors

• Doyen Valérie
• Chalancon Céline

Classifications

• C10M133/06 Primary

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

• C10M149/22 Primary

  Polyamines · CPC title

• C10N2040/26

  Two-strokes {or two-cycle engines} · CPC title

• C10N2040/255

  Gasoline engines · CPC title

• C10N2030/12

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