EP3172295A1

EP3172295A1 - Lubricating composition comprising an anti-knock compound

Info

Publication number: EP3172295A1
Application number: EP15739597.1A
Authority: EP
Inventors: Nicolas M. OBRECHT; Steve FAURE
Original assignee: Total Marketing Services SA
Current assignee: TotalEnergies Marketing Services SA
Priority date: 2014-07-24
Filing date: 2015-07-22
Publication date: 2017-05-31
Also published as: JP2017524778A; FR3024157A1; CN106661482A; WO2016012491A1; FR3024157B1; US20170204346A1

Abstract

The invention relates to the use of a lubricating composition comprising at least one base oil and at least one organic compound for reducing, or even eliminating, knocking in the engine of vehicles, preferably motor vehicles.

Description

Lubricating composition comprising an anti-rattling compound Technical field

The present invention is applicable to the field of lubricants, more particularly to the field of engine lubricants. More particularly, the present invention relates to the use of a lubricating composition for decreasing rattling in a vehicle engine, said lubricating composition comprising at least one base oil and at least one organic anti-rattling compound. The lubricant composition according to the invention thus makes it possible to reduce or even eliminate rattling in an engine of vehicles, preferably motor vehicles, while retaining good lubricating properties.

The present invention also relates to a lubrication process using this composition.

The present invention also relates to a method for reducing or even suppressing rattling in an engine of vehicles, preferably motor vehicles, implementing this lubricant composition.

The present invention also relates to the use of an organic compound in a lubricant composition for reducing or even suppressing rattling in an engine of vehicles, preferably motor vehicles.

The present invention also relates to the use of a concentrated composition of additives comprising at least one organic compound for reducing or even suppressing rattling in an engine of vehicles, preferably motor vehicles, using said organic compound.

Technological background

Knocking is a phenomenon that occurs in a spark ignition engine of vehicles, and more particularly in a spark ignition engine of motor vehicles and is due to the self-ignition of the fuel upstream of the flame front in the chamber of combustion.

This auto-ignition propagates at a very high speed in the combustion chamber and causes vibrations at high frequencies of the gaseous mass and thermal overload of the engine, which can lead to serious mechanical incidents.

Solutions commonly used by engine manufacturers to avoid this phenomenon, such as reduced ignition timing, significantly reduce the efficiency of spark ignition engines. In addition, following the establishment of the Kyoto Protocol, new environmental protection standards require the automotive sector to build vehicles with reduced pollutant emissions.

However, there is a trend today in vehicles to reduce the size of engines that must however operate at high power levels to maximize the gain in fuel economy.

However, this gain can be very easily altered by the rattling phenomenon.

The combustion phenomenon is a compromise between the propagation speed of the flame front from the spark plug and the self-ignition time of the fuel. When the latter is too short, the rattling occurs in the remote areas of the spark plug and most often near the piston and the cylinder.

A lubricant, and more particularly a motor lubricant, is used in the cylinders to reduce friction and wear. The proximity of the engine lubricant to the zones of occurrence of rattling opens the possibility of interaction between it and combustion.

Thus, it has been sought lubricants to reduce or even reduce the rattling in an engine. Documents US2763613, US2898359 have in particular described the use of anticliquidis compounds selected from organometallic compounds, and more particularly ferrocene compounds in a lubricating composition.

Furthermore, the document WO2004 / 101717 describes the use of organometallic compounds based on manganese in a lubricant composition to reduce the phenomenon of rattling in an engine.

However, the use of such organometallic compounds promotes deposits in the combustion chamber and can thus cause abnormal combustion such as hot-spot ignition which can cause significant mechanical failure. In addition, they may pose a risk to human health.

WO2004 / 104717 also describes various organic compounds of alcohol, ester or ether type that can be used in a lubricant composition to reduce the knocking phenomenon in an engine. Furthermore, US 8129320 discloses oils selected from trimellitic acid esters or alkyl naphthalene type compounds, and their use in a lubricant composition to reduce the phenomenon of rattling in an engine. However, the content by weight of these oils in the lubricant is at least 50% which can greatly reduce the friction reduction or oxidation resistance performance of the lubricant composition.

Thus, there remains the need for organic compounds to reduce or even eliminate the phenomenon of rattling in an engine and can be easily formulated in a lubricant composition.

An object of the present invention is therefore to provide organic compounds and a lubricating composition comprising these organic compounds which overcome all or part of the aforementioned drawbacks.

Another object of the present invention is to provide a composition for reducing or even suppressing rattling in an engine and whose formulation is easy to implement.

Another objective of the present invention is to provide a lubricant composition that makes it possible to reduce or even eliminate rattling in an engine while avoiding the appearance of deposits in the combustion chamber.

Another object of the present invention is to provide a lubrication method for reducing or even suppressing the rattling in an engine.

Summary of the invention

The invention thus relates to the use of a lubricant composition for reducing rattling in an engine of vehicles, preferably motor vehicles, said lubricant composition comprising:

at least one base oil,

at least one compound of formula (I):

(I)

in which • X- Y represents

OR

R1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR17, a group -NR18R19;

R2 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR20, a group -NR21 R22;

R3 represents a hydrogen atom, a saturated or unsaturated, substituted or unsubstituted, linear or branched alkyl group comprising from 1 to 10 carbon atoms, a group -OR23, a group -NR24R25;

R4 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR26, a group -NR27R28;

R5 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR29, a group -NR30R31;

R6 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR32, a group -NR33R34; R7 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR35, a group -NR36R37; R8 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR38, a group -NR39R40; R9 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR41, a group -NR42R43; R10 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR44, a group -NR45R46; R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR47, a group -NR48R49; R12 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR50, a group -NR51 R52; R13 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR53, a group -NR54R55; R14 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR56, a group -NR57R58; R15 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR59, a group -NR60R61; R16 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR62, a group -NR63R64; R17, R20, R23, R26, R29, R32, R35, R38, R41, R44, R47, R50, R53, R56, R59 and R62, which may be identical or different, independently represent a linear or branched, saturated or unsaturated, substituted alkyl group. or unsubstituted with 1 to 10 carbon atoms;

R18, R19, R21, R22, R24, R25, R27, R28, R30, R31, R33, R34, R36, R37, R39, R40, R42, R43, R45, R46, R48, R49, R51, R52, R54, R55, R57, R58, R60, R61, R63 and R64, which may be identical or different, independently represent a hydrogen atom or a saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 3 carbon atoms.

Surprisingly, the Applicant has found that the presence of a compound of formula (I) as defined above in a lubricant composition allows the lubricating composition, once implemented in an engine, to reduce or even eliminate the phenomenon of rattling in the engine.

Thus, the present invention makes it possible to formulate lubricating compositions having both good stability and good properties of reducing or even suppressing the knocking phenomenon once implemented in an engine.

Advantageously, the lubricant compositions used according to the invention have good properties of reducing or even suppressing the pinging phenomenon once implemented in an engine without the need to add a high content of anti-rattling compound in the lubricating composition.

Advantageously, the lubricant compositions used according to the invention have good properties for reducing or even suppressing the pinging phenomenon when used in an engine without the need to add other anti-knock additives, and especially not anti-knock additives selected from organometallic compounds.

Advantageously, the lubricant compositions used according to the invention have good properties of reducing or even suppressing the knock phenomenon once implemented in an engine and whose formulation is easy to implement.

Advantageously, the lubricant compositions used according to the invention have good properties of reducing or even suppressing the knocking phenomenon once implemented in an engine while at the same time making it possible to reduce or even eliminate the risk of deposits in the combustion chamber.

In one embodiment of the invention, the lubricant composition consists essentially of:

at least one base oil,

at least one compound of formula (I):

(I)

in which :

• X-Y represents:

or

R4 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR26, a group -NR27R28; R5 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR29, a group -NR30R31; R6 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR32, a group -NR33R34; R7 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR35, a group -NR36R37; R8 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR38, a group -NR39R40; R9 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR41, a group -NR42R43; R10 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR44, a group -NR45R46; R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR47, a group -NR48R49; R12 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR50, a group -NR51 R52; R13 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR53, a group -NR54R55; R14 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR56, a group -NR57R58; R15 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR59, a group -NR60R61; R16 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR62, a group -NR63R64; R17, R20, R23, R26, R29, R32, R35, R38, R41, R44, R47, R50, R53, R56, R59 and R62, which may be identical or different, independently represent a linear or branched, saturated or unsaturated alkyl group, substituted or unsubstituted having from 1 to 10 carbon atoms;

· R18, R19, R21, R22, R24, R25, R27, R28, R30, R31, R33, R34, R36, R37,

R39, R40, R42, R43, R45, R46, R48, R49, R51, R52, R54, R55, R57, R58, R60, R61, R63 and R64, which may be identical or different, independently represent a hydrogen atom or a group saturated or unsaturated, substituted or unsubstituted alkyl having from 1 to 3 carbon atoms.

The invention also relates to an engine oil comprising a lubricant composition as defined above.

The invention also relates to the use of a lubricant composition as defined above for the lubrication of vehicle engines, preferably motor vehicles.

The invention also relates to a method for lubricating a motor vehicle, preferably motor vehicles, said method comprising at least one step of contacting a mechanical part of the engine with a lubricant composition as defined above .

The invention also relates to a method for reducing or even suppressing rattling in a motor vehicle, preferably motor vehicles, comprising at least one step of contacting a mechanical part of the vehicle engine with a lubricant composition as defined herein. -above.

The invention also relates to the use of a compound of formula (I) as defined above in a lubricant composition to reduce or even eliminate rattling in engines, preferably motor vehicles.

The invention also relates to the use of a composition of the additive concentrate type in a lubricant composition comprising at least one base oil for reducing or even suppressing rattling in an engine of vehicles, preferably motor vehicles, said composition of type additive concentrate comprising:

at least one compound of formula (I):

(I)

in which :

• X- Y represents

or

• R18, R19, R21, R22, R24, R25, R27, R28, R30, R31, R33, R34, R36, R37, R39, R40, R42, R43, R45, R46, R48, R49, R51, R52, R54 R55, R57, R58, R60, R61, R63 and R64, which may be identical or different, independently represent a hydrogen atom or a saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 3 carbon atoms, - at least an additive selected from detergents, friction modifiers, anti-wear additives, dispersants, extreme pressure additives, antioxidants, viscosity index improvers, pour point improvers, defoamers thickeners and mixtures thereof. Detailed description of the invention

The percentages given below correspond to percentages by mass of active ingredient.

The lubricating composition comprises at least one compound of formula (I):

in which :

• X-Y represents:

OR

R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR 17, a group -NR 18 R 19 9;

R2 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR20, a group -NR21 R22; R3 represents a hydrogen atom, a saturated or unsaturated, substituted or unsubstituted, linear or branched alkyl group comprising from 1 to 10 carbon atoms, a group -OR23, a group -NR24R25;

R6 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR32, a group -NR33R34;

R7 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR35, a group -NR36R37; R8 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR38, a group -NR39R40; R9 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR41, a group -NR42R43; R10 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR44, a group -NR45R46; R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR47, a group -NR48R49; R12 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR50, a group -NR51 R52; R13 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR53, a group -NR54R55; R14 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR56, a group -NR57R58; R15 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR59, a group -NR60R61; R16 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR62, a group -NR63R64; R17, R20, R23, R26, R29, R32, R35, R38, R41, R44, R47, R50, R53, R56, R59 and R62, which may be identical or different, independently represent a linear or branched, saturated or unsaturated, substituted alkyl group. or unsubstituted with 1 to 10 carbon atoms;

Thus, the compound of formula (I) as defined above does not comprise any metallic metal derivative. The compound of formula (I) as defined above is not an organometallic compound.

In one embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia):

(the)

wherein R1, R2, R3, R4, R5 and R6 are as defined above. In a preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

R5 represents a hydrogen atom,

R1, R2, R3, R4 and R6 being as defined above. In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

R6 represents a hydrogen atom,

- R1, R2, R3, R4 and R5 being as defined above. In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

R5 and R6 represent a hydrogen atom,

R1, R2, R3 and R4 being as defined above. In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

- R1, R5 and R6 represent a hydrogen atom,

R2, R3 and R4 being as defined above. In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

R2, R5 and R6 represent a hydrogen atom,

- R1, R3 and R4 being as defined above. In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

- R3, R5 and R6 represent a hydrogen atom,

- R1, R2 and R4 being as defined above.

In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which:

- R4, R5 and R6 represent a hydrogen atom,

- R1, R2 and R3 being as defined above.

In a more preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ia) in which R 1, R 2, R 3, R 4, R 5 and R 6 represent a hydrogen atom. formula (Ia) used according to the invention, mention may be made of cyclopentadiene of formula:

In another embodiment of the invention, the lubricating composition comprises less a compound of formula (Ib):

(Ib)

wherein R1, R2, R3, R4, R7, R8, R9 and R10 being as defined above.

In a preferred embodiment of the invention, the lubricating composition comprises less a compound of formula (Ib) in which:

R7 represents a hydrogen atom,

- R1, R2, R3, R4, R8, R9 and R10 being as defined above. In a preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ib) in which:

R8 represents a hydrogen atom,

R1, R2, R3, R4, R7, R9 and R10 being as defined above.

In a preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ib) in which:

R 9 represents a hydrogen atom,

R1, R2, R3, R4, R7, R8 and R10 being as defined above.

R10 represents a hydrogen atom,

R1, R2, R3, R4, R7, R8 and R9 being as defined above.

- R7, R8, R9 and R10 represent a hydrogen atom,

R1, R2, R3 and R4 being as defined above.

R1, R7, R8, R9 and R10 represent a hydrogen atom,

R2, R3 and R4 being as defined above.

R2, R7, R8, R9 and R10 represent a hydrogen atom,

- R1, R3 and R4 being as defined above.

- R3, R7, R8, R9 and R10 represent a hydrogen atom,

- R1, R2 and R4 being as defined above.

In a preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ib) in which: - R4, R7, R8, R9 and R10 represent a hydrogen atom,

- R1, R2 and R3 being as defined above.

In a more preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ib) in which R1, R2, R3, R4, R7, R8, R9 and R10 represent a hydrogen atom.

As an example of a compound of formula (Ib) used according to the invention, mention may be made of the indene of formula:

In another embodiment of the invention, the lubricating composition comprises less a compound of formula (Ic):

(the)

wherein R 1, R 2, R 3, R 4, R 1, R 12, R 13, R 14, R 15 and R 16 are as defined above.

In a preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ic) in which:

R15 represents a hydrogen atom,

R1, R2, R3, R4, R1, R12, R13, R14 and R16 being as defined above.

R16 represents a hydrogen atom,

R1, R2, R3, R4, R1 1, R12, R13, R14 and R15 being as defined above. In a preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ic) in which:

R15 and R16 represent a hydrogen atom,

- R1, R2, R3, R4, R1 1, R12, R13 and R14 being as defined above.

In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ic) in which:

- R1 1, R15 and R16 represent a hydrogen atom,

R1, R2, R3, R4, R12, R13 and R14 being as defined above.

- R12, R15 and R16 represent a hydrogen atom,

- R1, R2, R3, R4, R1 1, R13 and R14 being as defined above.

- R13, R15 and R16 represent a hydrogen atom,

- R1, R2, R3, R4, R1 1, R12 and R14 being as defined above.

- R14, R15 and R16 represent a hydrogen atom,

- R1, R2, R3, R4, R1 1, R12 and R13 being as defined above.

- R1 1, R12, R13, R14, R15 and R16 represent a hydrogen atom,

R1, R2, R3 and R4 being as defined above.

R1, R1, R12, R13, R14, R15 and R16 represent a hydrogen atom,

R2, R3 and R4 being as defined above.

In another preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ic) in which: R2, R1, R12, R13, R14, R15 and R16 represent a hydrogen atom,

- R1, R3 and R4 being as defined above.

- R3, R1 1, R12, R13, R14, R15 and R16 represent a hydrogen atom,

- R1, R2 and R4 being as defined above.

- R4, R1 1, R12, R13, R14, R15 and R16 represent a hydrogen atom,

- R1, R2 and R3 being as defined above.

In a more preferred embodiment of the invention, the lubricating composition comprises at least one compound of formula (Ic) in which R 1, R 2, R 3, R 4, R 1, R 12, R 13, R 14, R 15 and R 16 represent an atom. hydrogen.

As an example of a compound of formula (Ic) used according to the invention, mention may be made of dicyclopentadiene of formula:

In one embodiment of the invention, the content by weight of compound of formula (I) ranges from 0.5 to 25%, preferably from 1 to 20%, advantageously from 5 to 15% relative to the total weight of the lubricating composition.

In one embodiment of the invention, the compound of formula (I) may be in pure form.

By pure form according to the invention is meant that the compound of formula (I) is monocomponent and does not comprise any other component other than the compound of formula (I) or is not associated with another compound.

In another embodiment of the invention, the compound of formula (I) may be encapsulated. Thus, the compound of formula (I) may be present in the form of a capsule or a microcapsule comprising a minimum content of compound of formula (I), this minimum content being chosen so that the content by weight of compound of formula (I) ranges from 0.5 to 25%, preferably from 1 to 20%, advantageously from 5 to 15% relative to the total weight of the lubricating composition.

The capsules or microcapsules comprising the compound of formula (I) may be chosen from any type of capsule or microcapsule known to those skilled in the art.

The capsules or microcapsules may especially consist of a polymeric envelope chosen from polyurethanes, polyureas, polystyrenes, polyesters, polyamides or copolymers thereof, polyacrylonitriles, vinyl resins, formaldehyde resins or aminoplast resins.

In a preferred embodiment of the invention, the compound (I) will be salted out of the capsules or microcapsules when the capsules or microcapsules are subjected to physico-chemical constraints, and more particularly when the capsules or microcapsules are subjected to high temperatures, for example temperatures above 150 ° C as may be encountered in areas near the piston, or when the capsules or microcapsules are subjected to high shear stresses, which is generally the case in a motor, corresponding for example to values of 10 to 100 million reciprocal seconds (s ¹ ), or when the capsules or microcapsules are subjected to variations in the acidity or basicity of the surrounding medium, and more particularly to variations in acidity as can occur in the piston / jacket area.

Examples of capsules or microcapsules that can be used in the present invention are described in particular in documents WO2010 / 134044, US20130146009 or WO2014 / 046876.

In another embodiment of the invention, the compound (I) can be released by volatilization.

Volatilization of the compound of formula (I) can in particular be implemented by adjusting the distillation curve of the lubricant composition. As an example, mention may be made of the use of a compound of formula (I) which is more volatile than the rest of the lubricating composition and which makes it possible to extract the compound of formula (I) in the zones subjected to temperatures above the point boiling of the compound of formula (I) but lower than the boiling point of the lighter components of the rest of the lubricating composition. In another embodiment of the invention, the compound of formula (I) can be synthesized in situ in the lubricating composition

Base oil

The lubricant compositions used according to the invention may contain any type of mineral lubricating base oil, synthetic or natural, animal or plant adapted to their use.

The base oil (s) used in the lubricant compositions used according to the present invention may be oils of mineral or synthetic origin of groups I to V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification) such that summarized below, alone or as a mixture.

Table I

The mineral base oils used according to the invention include all types of bases obtained by atmospheric and vacuum distillation of crude oil, followed by refining operations such as solvent extraction, desalting, solvent dewaxing, hydrotreatment, hydrocracking and hydroisomerization. , hydrofinishing.

The base oils of the lubricant compositions used according to the invention may also be synthetic oils, such as certain carboxylic acid esters of alcohols or polyalphaolefins. The polyalphaolefins used as base oils are, for example, obtained from monomers having from 4 to 32 carbon atoms (for example octene, decene), and a viscosity at 100 ° C. of between 1.5 and 15 cSt according to the standard. ASTM D445. Their weight average molecular weight is typically comprised between 250 and 3000 according to ASTM D5296. Mixtures of synthetic and mineral oils can also be used.

There is no limitation as to the use of such or such lubricating base for producing the lubricating compositions used according to the invention, except that they must have properties, in particular viscosity, viscosity index, sulfur, oxidation resistance, suitable for use in a gearbox, particularly in a gearbox of motor vehicles, particularly in a manual gearbox.

In one embodiment of the invention, the lubricating bases represent at least 50% by weight, with respect to the total mass of the lubricating composition, preferably at least 60%, or at least 70%. Typically, they represent between 75 and 99.9% by weight, relative to the total mass of the lubricant compositions used according to the invention.

In a preferred embodiment of the invention, the lubricating compositions comprise Group I and / or III mineral bases, or Group IV synthetic bases according to the API classification.

In another preferred embodiment of the invention, the lubricating compositions have a kinematic viscosity at 100 ° C. measured according to ASTM D445 ranging from 3 to 25 cSt, preferably from 5 to 22 cSt, advantageously from 5 to 13 cSt. .

In another preferred embodiment of the invention, the lubricating compositions have a viscosity index (VI) greater than or equal to 130, preferably greater than or equal to 140, advantageously greater than or equal to 150 measured according to the ISO 2909 standard.

Other additives

The lubricant compositions used according to the invention may also contain at least one additive chosen from detergents, antiwear additives, extreme pressure additives, dispersants, pour point improvers, antifoams, thickeners, viscosity index improvers and mixtures thereof. The anti-wear and extreme pressure additives protect the friction surfaces by forming a protective film adsorbed on these surfaces. There is a wide variety of anti-wear additives, but the category most used in lubricating compositions, especially for motor oil, is that of phosphosulfur additives such as metal alkylthiophosphates, in particular zinc alkylthiophosphates, and more specifically dialkyldithiophosphates. zinc or ZnDTP. Amine phosphates are also anti-wear additives that can be used in the lubricant compositions used according to the invention. However, the phosphorus provided by these additives acts as a poison for catalytic systems of automobiles because these additives are ash generators. These effects can be minimized by partially substituting amine phosphates with non-phosphorus additives, such as, for example, polysulfides, especially sulfur-containing olefins.

In one embodiment, in particular for a motor application, the anti-wear and extreme-pressure additives may be present in the lubricating composition at contents ranging from 0.01 to 6% by weight, preferably from 0.05 to 4%. preferably from 0.1% to 2% relative to the total mass of the lubricating composition. The friction modifying additive can be a compound providing metallic elements or a compound without ash. Among the compounds providing metal elements, mention may be made of transition metal complexes such as Mo, Sb, Sn, Fe, Cu, Zn, W, the ligands of which may be hydrocarbon compounds containing oxygen, nitrogen or sulfur atoms. or phosphorus, and especially molybdenum dithiocarbamates. The ashless friction modifiers are of organic origin and may be selected from monoesters of fatty acids and polyols, alkoxylated amines, fatty alkoxylated amines, fatty epoxides, borate fatty epoxides; fatty amines or fatty acid glycerol esters. For the purposes of the present invention, the term "fatty" or "fatty (s)" is intended to mean a hydrocarbon group comprising from 10 to 24 carbon atoms.

In one embodiment, the friction modifying additive may be present at levels ranging from 0.01 to 5% by weight, preferably from 0.1 to 2% relative to the total weight of the lubricating composition. The antioxidant additives retard the degradation of the lubricating compositions in service, in particular engine oils in service, which degradation may in particular result in the formation of deposits, the presence of sludge, or an increase in the viscosity of the lubricant composition, especially the engine oil. Antioxidant additives act in particular as radical inhibitors or destroyers of hydroperoxides. Among the antioxidants commonly used, mention may be made of antioxidants of phenolic or amine type, phosphosulfur antioxidants. Some of these antioxidants, for example phosphosulfides, can be ash generators. Phenolic antioxidants may be ashless, or may be in the form of neutral or basic metal salts. The antioxidant agents may especially be chosen from sterically hindered phenols, sterically hindered phenol esters and sterically hindered phenols comprising a thioether bridge, diphenylamines, diphenylamines substituted by at least one C 1 -C 12 alkyl group, the Ν, Ν 'dialkyl aryl diamines and combinations thereof. For the purposes of the present invention, sterically hindered phenol means a compound comprising a phenol group in which at least one vicinal carbon of the carbon carrying the alcohol function is substituted by at least one C 1 -C 10 alkyl group, preferably an alkyl group containing C1-C6, preferably a C4 alkyl group, preferably by the ter-butyl group. Amino compounds are another class of antioxidants that can be used, optionally in combination with phenolic antioxidants. Typical examples are aromatic amines of formula R25R26R27N, wherein R25 represents an optionally substituted aliphatic or aromatic group, R26 represents an optionally substituted aromatic group, R27 represents a hydrogen atom, an alkyl group, an aryl group or a group of formula R28S (O) _Z R29, where R28 represents an alkylene group or an alkenylene group, R29 represents an alkyl group, an alkenyl group or an aryl group and z represents an integer equal to 0, 1 or 2. sulfurized alkyl phenols or their alkali and alkaline earth metal salts can also be used as antioxidants. Another class of antioxidants is copper compounds, for example copper thio- or dithiophosphates, copper and carboxylic acid salts, dithiocarbamates, sulphonates, phenates, copper acetylacetonates. Copper salts I and II, succinic acid or anhydride may also be used.

The lubricant composition used according to the invention may contain any type of antioxidant additives known to those skilled in the art. Advantageously, the ashless antioxidants are used.

In one embodiment, the lubricant composition used according to the invention may comprise from 0.5 to 2% of at least one antioxidant additive by weight relative to the total weight of the lubricant composition.

The detergent additives reduce in particular the formation of deposits on the surface of the metal parts by dissolving the secondary products of oxidation and combustion. The detergents that can be used in the lubricant composition used according to the invention are well known to those skilled in the art. The detergents commonly used in the formulation of lubricating compositions may be anionic compounds having a long lipophilic hydrocarbon chain and a hydrophilic head. The associated cation is typically a metal cation of an alkali or alkaline earth metal. The detergents are preferably chosen from alkali metal or alkaline earth metal salts of carboxylic acids, sulphonates, salicylates and naphthenates, as well as the salts of phenates. The alkali and alkaline earth metals are preferentially calcium, magnesium, sodium or barium. These metal salts may contain the metal in an approximately stoichiometric amount or in excess (in excess of the stoichiometric amount). In the latter case, these detergents are called overbased detergents. The excess metal, bringing the overbased character to the detergent, is in the form of metal salts insoluble in the oil, for example carbonate, hydroxide, oxalate, acetate, glutamate, preferably carbonate.

In one embodiment, the lubricant composition used according to the invention may comprise from 0.5 to 4% by weight of detergent, relative to the total mass of the lubricating composition.

The pour point depressant additives notably improve the cold behavior of the lubricating compositions, by slowing down the formation of paraffin crystals. As examples of pour point depressant additives, mention may be made of alkyl polymethacrylates, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalenes and alkylated polystyrenes.

In one embodiment, the lubricant composition used according to the invention may comprise, in addition, at least one dispersant. The dispersants may be chosen from groups formed by Mannich bases or bases, succinimides and their derivatives, in particular borated succinimides.

In one embodiment, the lubricating composition used according to the invention may comprise from 0.2 to 10% by weight of dispersants relative to the total mass of the lubricant composition.

The viscosity index improver polymers may be chosen from among polymeric esters, ethylene-based copolymers, especially ethylene / propylene copolymers and ethylene / α-olefin copolymers, homopolymers or copolymers of styrene, butadiene or isoprene, hydrogenated or not, polymethacrylates (PMA).

In one embodiment, the lubricant composition used according to the invention may comprise from 1 to 15% by weight of viscosity index improving polymers with respect to the total weight of the lubricating composition. The anti-foam additives can be chosen from polyacrylates or silicone compounds and their derivatives, and in particular polysiloxanes. In one embodiment of the invention, the lubricant composition comprises:

from 75 to 99.5% of at least one base oil,

from 0.5 to 25% of at least one compound of formula (I).

In another embodiment of the invention, the lubricant composition comprises:

from 75 to 99% of at least one base oil,

from 0.5 to 25% of at least one compound of formula (I),

- from 0.5 to 5% of at least one other additive.

In another embodiment of the invention, the lubricant composition consists essentially of:

- 75 to 99.5% of at least one base oil,

- 0.5 to 25% of at least one compound of formula (I).

75 to 99% of at least one base oil,

0.5 to 25% of at least one compound of formula (I),

- 0.5 to 5% of at least one other additive.

All the characteristics and preferences presented above for the base oil, the compound of formula (I) and the additional additive also apply to the above lubricating compositions.

In one embodiment of the invention, the lubricating composition is not an emulsion. In another embodiment of the invention, the lubricant composition is anhydrous.

The invention also relates to an engine oil comprising a lubricant composition used according to the invention.

All the characteristics and preferences presented for the lubricant composition also apply to the engine oil according to the invention. In one embodiment of the invention, the engine oil may be grade OW-16, OW-20 and 5W-30 according to the classification SAEJ300, characterized by a kinematic viscosity at 100 ° C (KV100) ranging from 5, 6 to 12.5 cSt measured according to ASTM D445 international standard.

In another embodiment of the invention, the engine oil may be characterized by a viscosity index, calculated according to the international standard ISO 2909, greater than or equal to 130, preferably greater than or equal to 150.

In order to formulate a motor oil, use may advantageously be made of base oils having a sulfur content of less than 0.3%, for example Group III mineral oils, and sulfur-free, preferably Group IV, synthetic bases, or mixtures thereof. .

The subject of the invention is also the use of a lubricant composition as defined above for the lubrication of vehicle engines, preferably of motor vehicles, advantageously engines of spark-ignition motor vehicles.

The invention also relates to the use of a lubricant composition as defined above for reducing the fuel consumption of vehicles, particularly motor vehicles.

The set of characteristics and preferences presented for the lubricant composition above also applies to the above uses. The subject of the invention is also a method of lubricating a motor of vehicles, preferably of motor vehicles, advantageously of a spark ignition motor vehicle, said method comprising at least one step of contacting a motor vehicle. mechanical part of the engine with a lubricating composition as defined above.

The subject of the invention is also a method for reducing or even suppressing rattling in an engine of vehicles, preferably of motor vehicles, advantageously of spark ignition automotive vehicles comprising at least one step of bringing into contact a mechanical part of the engine of the engine. vehicle with a lubricating composition as defined above. The reduction or even the suppression of rattling in an engine can be evaluated by any method known to those skilled in the art.

The reduction or even the suppression of rattling in an engine by the use of a lubricant composition can notably be evaluated by measuring the evolution of the power of the engine and by measuring the change in the feedrate parameter. ignition in the presence of the lubricating composition.

The invention also relates to a method for reducing the fuel consumption of a vehicle, in particular of a motor vehicle comprising at least one step of contacting a mechanical part of the engine of the vehicle with a lubricant composition such as as defined above.

All the characteristics and preferences presented above for the lubricating composition also apply to the above processes. The vehicles may include a two or four stroke internal combustion engine and spark ignition engine.

Engines may be gasoline engines for use with gasoline or natural gas. For the purposes of the present invention, the term "conventional gasoline" is understood to mean engines that are powered by a fuel obtained after refining an oil of mineral origin (such as oil for example). The engines may also be petrol engines modified to be fueled by a fuel based on oils derived from renewable materials such as alcohol-based fuels.

The vehicles may be light vehicles such as automobiles and motorcycles. The vehicles can also be heavy goods vehicles.

The subject of the invention is also the use of a compound of formula (I) as defined above in a lubricant composition for reducing or even suppressing rattling in engines, preferably motor vehicles, advantageously motor vehicle engines. spark ignition.

The set of characteristics and preferences presented above for the compound of formula (I) also applies to the use above.

The subject of the invention is also the use of a composition of the additive concentrate type in a lubricant composition comprising at least one base oil for reducing or even eliminating rattling in an engine of vehicles, preferentially of motor vehicles, said composition additive concentrate type comprising:

at least one compound of formula (I):

which :

X- Y represents

OR

R3 represents a hydrogen atom, a saturated or unsaturated, substituted or unsubstituted, linear or branched alkyl group comprising from 1 to 10 carbon atoms, a group -OR23, a group -NR24R25; R4 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR26, a group -NR27R28; R5 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR29, a group -NR30R31; R6 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR32, a group -NR33R34; R7 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR35, a group -NR36R37; R8 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR38, a group -NR39R40; R9 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR41, a group -NR42R43; R10 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR44, a group -NR45R46; R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR47, a group -NR48R49; R12 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR50, a group -NR51 R52; R13 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR53, a group -NR54R55; R14 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR56, a group -NR57R58; R15 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR59, a group -NR60R61; R 16 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR62, a group -NR63R64;

R17, R20, R23, R26, R29, R32, R35, R38, R41, R44, R47, R50, R53, R56, R59 and R62, which may be identical or different, independently represent a linear or branched, saturated or unsaturated alkyl group, substituted or unsubstituted having from 1 to 10 carbon atoms;

• R18, R19, R21, R22, R24, R25, R27, R28, R30, R31, R33, R34, R36, R37, R39, R40, R42, R43, R45, R46, R48, R49, R51, R52, R54 R55, R57, R58, R60, R61, R63 and R64, which may be identical or different, independently represent a hydrogen atom or a saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 3 carbon atoms, - at least an additive selected from detergents, friction modifiers, anti-wear additives, dispersants, extreme pressure additives, antioxidants, viscosity index improvers, pour point improvers, defoamers thickeners and mixtures thereof.

The set of characteristics and preferences presented above for the compound of formula (I) and for the additional additive also applies to the composition of the additive concentrate type above.

In one embodiment of the invention, to the additive concentrate type composition used according to the invention can be added at least one base oil to obtain a lubricant composition used according to the invention.

Claims

Use of a lubricant composition for decreasing rattling in a vehicle engine, said lubricant composition comprising:

at least one base oil,

at least one compound of formula (I):

(I)

in which :

• X- Y represents

or

R1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR17, a group -NR18R19; R2 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR20, a group -NR21 R22; R3 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR23, a group -NR24R25; R4 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR26, a group -NR27R28; R5 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR29, a group -NR30R31; R6 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR32, a group -NR33R34; R7 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR35, a group -NR36R37; R8 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR38, a group -NR39R40; R9 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR41, a group -NR42R43; R10 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR44, a group -NR45R46; R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR47, a group -NR48R49; R12 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR50, a group -NR51 R52; R13 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR53, a group -NR54R55; R14 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR56, a group -NR57R58;

R15 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR59, a group -NR60R61;

R 16 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR62, a group -NR63R64;

• R18, R19, R21, R22, R24, R25, R27, R28, R30, R31, R33, R34, R36, R37, R39, R40, R42, R43, R45, R46, R48, R49, R51, R52, R54 , R55, R57, R58, R60, R61, R63 and R64, which may be identical or different, independently represent a hydrogen atom or a saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 3 carbon atoms.

Use of the lubricant composition according to claim 1 of formula (la)

Use of the lubricant composition according to claim 2 wherein R5 and R6 represent a hydrogen atom.

Use of the lubricating composition according to claim 2 or 3 wherein R1, R2, R3 and R4 represent a hydrogen atom.

Use of the lubricant composition according to claim 1 of formula (Ib):

(Ib)

Use of the lubricant composition according to claim 5 wherein R7, R8, R9 and R10 represent a hydrogen atom.

Use of the lubricating composition according to claim 5 or 6 wherein R1, R2, R3 and R4 represent a hydrogen atom.

Use of the lubricating composition according to Claim 1 of formula (Ic):

(the)

9. Use of the lubricating composition according to claim 8 wherein R15 and R16 represent a hydrogen atom.

10. Use of the lubricant composition according to claim 8 or 9 wherein R1 1, R12, R13 and R14 represent a hydrogen atom. 1 1. Use of the lubricating composition according to any one of claims 8 to 10 wherein R1, R2, R3 and R4 represent a hydrogen atom.

12. Use of the lubricant composition according to any one of the preceding claims wherein the content by weight of compound of formula (I) ranges from 0.5 to 25%, preferably from 1 to 20%, advantageously from 5 to 15%. % relative to the total weight of the lubricating composition.

13. Use of the lubricant composition according to any one of the preceding claims further comprising at least one additive selected from detergents, friction modifiers, dispersants, anti-wear additives, extreme pressure additives, antioxidants, viscosity index improvers, pour point improvers, defoamers, thickeners and mixtures thereof.

14. Use of a concentrate-type additive composition in a lubricant composition comprising at least one base oil for decreasing rattling in a vehicle engine, said concentrate-type additive composition comprising:

at least one compound of formula (I):

OR

R1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR17, a group -NR18R19; R2 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR20, a group -NR21 R22; R3 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR23, a group -NR24R25; R4 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR26, a group -NR27R28; R5 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR29, a group -NR30R31; R6 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR32, a group -NR33R34; R7 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR35, a group -NR36R37; R8 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR38, a group -NR39R40; R9 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR41, a group -NR42R43; R10 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR44, a group -NR45R46; R 1 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR47, a group -NR48R49; R12 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR50, a group -NR51 R52; R13 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR53, a group -NR54R55;

R14 represents a hydrogen atom, a linear or branched, saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 10 carbon atoms, a group -OR56, a group -NR57R58;

• R18, R19, R21, R22, R24, R25, R27, R28, R30, R31, R33, R34, R36, R37, R39, R40, R42, R43, R45, R46, R48, R49, R51, R52, R54 R55, R57, R58, R60, R61, R63 and R64, which may be identical or different, independently represent a hydrogen atom or a saturated or unsaturated, substituted or unsubstituted alkyl group comprising from 1 to 3 carbon atoms,

at least one additive chosen from detergents, friction modifiers, anti-wear additives, dispersants, extreme pressure additives, antioxidants, viscosity index improving polymers, pour point improvers, antifoams, thickeners and mixtures thereof.