JP6698020B2 - Aliphatic triamine-based lubricant composition - Google Patents

Description

  The invention is applicable in the field of lubricants, in particular in the field of engine lubricants, and more particularly in the field of motor vehicle engine lubricants. More particularly, the present invention relates to a lubricant composition comprising at least one base oil, at least one organomolybdenum compound, at least one compound containing dithiophosphate groups, and at least one aliphatic triamine. The lubricant composition according to the present invention has suitable friction properties for steel/steel and steel/carbon coated contacts as well as carbon coated/carbon coated contacts while retaining suitable wear resistance properties. ..

  The present invention further relates to a lubrication method utilizing this composition.

  The invention also relates to a method of reducing the friction between two steel surfaces, in particular between two steel surfaces in an engine, and more particularly between two steel surfaces in an automotive vehicle engine.

  The present invention further relates to a method of reducing friction between steel surfaces and carbon coated surfaces, especially between steel surfaces and carbon coated surfaces in engines, and more particularly between steel surfaces and carbon coated surfaces in motor vehicle engines.

  The present invention further relates to a method of reducing friction between two carbon coated surfaces, and more particularly between two carbon coated surfaces in an automotive vehicle engine.

  The invention further relates to a method of reducing the fuel consumption of a vehicle, more particularly a motor vehicle.

  The present invention further provides an aliphatic triamine in a lubricant composition for reducing friction between two steel surfaces, especially between two steel surfaces in an engine, and more particularly between two steel surfaces in an automotive vehicle engine. Regarding the use of.

  The present invention further provides a lubricant composition for reducing friction between steel surfaces and carbon coated surfaces, especially between steel surfaces and carbon coated surfaces in engines, and more particularly between steel surfaces and carbon coated surfaces in motor vehicle engines. To the use of aliphatic triamines in products.

  The present invention further provides a lubricant composition for reducing friction between two carbon coated surfaces, especially between two carbon coated surfaces in an engine, and more particularly between two carbon coated surfaces in an automotive vehicle engine. It relates to the use of aliphatic triamines.

  The invention further relates to the use of aliphatic triamines in lubricant compositions for reducing the fuel economy of vehicles, and more particularly motor vehicles.

  The present invention further relates to additive concentrate type compositions comprising at least one organomolybdenum compound, at least one compound containing a dithiophosphate group, and at least one aliphatic triamine.

  The purpose of the lubricant is to reduce the friction and wear phenomena of mechanical parts, especially in vehicle engines, and more particularly in motor vehicle engines.

  It is known to incorporate friction modifiers in lubricants to reduce these friction phenomena.

  Among the friction modifiers, organomolybdenum compounds represent a group of compounds, and the friction reducing properties of these compounds, especially those relating to contact between two steel surfaces, have been widely described.

  However, it is known to the person skilled in the art that the use of organomolybdenum compounds, especially organomolybdenum compounds containing a dithiocarbamate group, can lead to a deterioration of the wear phenomenon of mechanical parts.

  Therefore, in order to solve this problem, it has been widely discussed to combine an organic molybdenum compound and an antiwear compound (an antiwear compound such as a compound containing a dithiophosphate group) in a lubricant composition. .

  US Pat. No. 5,650,381 particularly mentions a lubricant composition comprising an organic molybdenum compound and zinc dithiophosphate.

  Furthermore, it is known that applying a coating to multiple parts (especially metal parts) can improve its wear resistance under intensive and repeated friction conditions. Among the existing technologies, carbon coatings, in particular DLC (diamond like carbon) coatings based on amorphous carbon materials with properties close to diamond, are known.

  Therefore, DLC coatings are used as coatings on surfaces of vehicle engine components, especially motor vehicle engine components.

  However, it is known that the friction reduction properties of carbon coatings, especially DLC coatings, can be altered or even worsened in the presence of lubricants.

  More particularly, it has been observed that organomolybdenum compounds present in the lubricant can degrade or even delaminate the carbon coating present on the surface. Also, this degradation can be exacerbated as the organomolybdenum compound content in the lubricant increases.

  Therefore, studies have been conducted on lubricants that are compatible with carbon material coated surfaces, especially DLC coatings or nanodiamond coatings, especially lubricants that do not contain organomolybdenum compounds.

  For example, EP 2479247 describes a lubricant containing a compound based on a zinc phosphate compound and a sulfur-containing compound.

  In addition, EP 1 338 641 A describes a lubricant containing an amine as a friction modifier, which is compatible with a surface having a DLC coating.

  However, this document does not give any teaching on the friction-reducing properties of these lubricants for steel/steel contacts. Furthermore, this document does not give any teaching on the antiwear properties of these lubricants for use in either steel/steel or steel/carbon coated contacts.

  As the use of carbon coatings in engines, especially carbon coatings in motor vehicle engines, has increased, while maintaining favorable wear properties, for steel/steel contact, for steel/carbon coating contact, and for carbon. Lubricants with suitable friction properties for coating/carbon coating contacts need to be investigated.

  It is an object of the present invention to provide a lubricant composition that overcomes some or all of the above mentioned drawbacks.

  Another object of the invention is to provide a formulation of a lubricant composition that is simple to carry out.

  Another object of the present invention is to provide a lubrication process that reduces friction between two steel surfaces as well as between two carbon coated surfaces and between steel surfaces and carbon coated surfaces.

US Pat. No. 5,650,381 European Patent No. 2479247 European Patent No. 1338641

The object of the invention is therefore a lubricant composition comprising:
-At least one base oil,
-At least one organomolybdenum compound,
At least one compound containing a dithiophosphate group, and at least one aliphatic triamine.

  Surprisingly, Applicants have found that the presence of at least one organomolybdenum compound, at least one compound containing a dithiophosphate group, and at least one aliphatic triamine in a lubricant composition results in steel/steel contact, steel/steel contact, It has been discovered that it is possible to simultaneously provide suitable friction characteristics for carbon coated contacts and carbon coated/carbon coated contacts.

  Accordingly, the present invention is a lubricant containing optimized organomolybdenum compound amounts and having suitable friction properties for steel/steel and steel/carbon coated contacts as well as carbon coated/carbon coated contacts. Allows the composition to be formulated.

  Preferably, the lubricant composition according to the present invention has suitable friction properties for steel/steel contact, steel/carbon coated contact and carbon coated/carbon coated contact while retaining suitable wear resistance properties. There is.

  Preferably, the lubricant composition according to the invention enables fuel savings during all operating steps of a vehicle engine, preferably a motor vehicle engine, particularly preferably when starting.

  Preferably, the lubricant compositions according to the invention also have suitable storage stability, with little or no change in viscosity.

In an embodiment of the invention, the lubricant composition consists essentially of:
-At least one base oil,
-At least one organomolybdenum compound,
At least one compound containing a dithiophosphate group, and at least one aliphatic triamine.

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

  The invention further relates to the use of a lubricant composition as defined above for the lubrication of mechanical parts, in particular mechanical parts in transmission and/or vehicle engines (preferably motor vehicle engines).

  The invention further relates to the use of a lubricant composition as defined above for reducing the friction between two steel surfaces, in particular in a vehicle engine (preferably a motor vehicle engine). Regarding

  The present invention further relates to the use of a lubricant composition as described above for reducing friction between a steel surface and a carbon coated surface, especially in a vehicle engine (preferably an automotive vehicle engine). ..

  The present invention further provides a lubricant composition as defined above for reducing friction between two carbon coated surfaces, especially two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine). Regarding the use of.

  The invention further relates to the use of a lubricant composition as defined above for reducing the fuel economy of a vehicle, preferably a motor vehicle.

  The invention further relates to a method for lubricating a mechanical part, in particular a mechanical part in a transmission and/or a vehicle engine, preferably a motor vehicle engine, said method comprising a lubricant as defined above. At least one step of contacting the composition with at least one component.

  The invention further relates to a method of reducing the friction between two steel surfaces, in particular between two steel surfaces in a vehicle engine (preferably a motor vehicle engine), said method comprising a lubricant as defined above. At least one step of contacting the composition with at least one of the steel surfaces.

  The invention further relates to a method of reducing friction between a steel surface and a carbon coated surface, in particular a steel surface and a carbon coated surface in a vehicle engine (preferably a motor vehicle engine), a lubricant as defined above. At least one step of contacting the composition with at least one of these surfaces.

  The invention further relates to a method of reducing the friction between two carbon coated surfaces, in particular between two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine), said method as defined above. At least one step of contacting the lubricant composition with at least one of the carbon coated surfaces.

  The invention further relates to a method of reducing the fuel economy of a vehicle, preferably a motor vehicle, said method comprising at least one step of contacting a mechanical composition of a vehicle engine with a lubricant composition as defined above. including.

  The invention further provides at least one base oil, at least one organomolybdenum compound, for reducing friction between two steel surfaces, in particular between two steel surfaces in a vehicle engine (preferably a motor vehicle engine), And the use of an aliphatic triamine in a lubricant composition comprising at least one compound containing a dithiophosphate group.

  The present invention further provides at least one base oil, at least one base oil, for reducing friction between a steel surface and a carbon coated surface, especially in a vehicle engine (preferably a motor vehicle engine). It relates to the use of an aliphatic triamine in a lubricant composition comprising an organomolybdenum compound and at least one compound containing a dithiophosphate group.

  The present invention further provides at least one base oil, at least one organomolybdenum for reducing friction between two carbon coated surfaces, especially between two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine). It relates to the use of an aliphatic triamine in a lubricant composition comprising a compound and at least one compound containing a dithiophosphate group.

  The present invention further provides a lubricant composition comprising at least one base oil, at least one organomolybdenum compound, and at least one compound containing a dithiophosphate group for reducing the fuel economy of a vehicle, preferably a motor vehicle. The use of aliphatic triamines therein.

The invention further relates to an additive concentrate-type composition comprising:
-At least one organomolybdenum compound,
At least one compound containing a dithiophosphate group, and at least one aliphatic triamine.

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

(Organic molybdenum compound)
The lubricant composition according to the invention comprises at least one organomolybdenum compound. The organomolybdenum compound according to the present invention means any oil-soluble organomolybdenum compound.

  In an embodiment of the present invention, the organic molybdenum compound can be selected from organic molybdenum complexes (molybdenum carboxylates, esters, amides, etc.), wherein the organic molybdenum complex is molybdenum oxide or ammonium molybdate, and fat, glyceride, fatty acid. Alternatively, it can be obtained by reaction with a fatty acid derivative (ester, amine, amide, etc.).

  In a preferred embodiment of the invention, the organomolybdenum compound is selected from molybdenum complexes having an amide type ligand and no sulfur and phosphorus. Organomolybdenum compounds include molybdenum sources (which may be, for example, trimolybdenum oxide), amine derivatives, and fatty acids (eg, fatty acids containing from 4 to 28 carbon atoms, preferably 8 to 18 carbon atoms, such as animal or vegetable oils. It is mainly prepared by the reaction of fatty acids contained in. The synthesis of such compounds is described, for example, in US Pat. No. 4,889,647, EP 0546357, US Pat. No. 5412130 and EP 1770153.

In a preferred embodiment of the invention, the organomolybdenum compound is selected from the organomolybdenum complexes obtained by the following reactions:
(I) Mono-, di- or triglyceride type fats (ie fatty acids)
(Ii) Amine source of formula (A):

In the formula:
-X ¹ represents an oxygen atom or a nitrogen atom,
-X ² represents an oxygen atom or a nitrogen atom,
When X ¹ or X ² represents an oxygen atom, the corresponding n and m represent 1.
When X ¹ or X ² represents a nitrogen atom, the corresponding n and m represent 2.
(Iii) and a molybdenum source selected from trimolybdenum oxide or molybdate (preferably ammonium molybdate) in an amount sufficient to provide 0.1 to 30% molybdenum based on the total weight of the complex.

  In an embodiment of the present invention, the organo-molybdenum complex may include 2-8.5 wt% molybdenum based on the weight of the complex.

  In a preferred embodiment of the invention, the organomolybdenum complex is constituted by at least one compound of formula (I) or (II), alone or in a mixture:

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ contains 3 to 30 carbon atoms, preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms, and is a straight-chain or branched, saturated or unsaturated alkyl group. Represents;

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ contains 3 to 30 carbon atoms, preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms, and is a straight-chain or branched, saturated or unsaturated alkyl group. Represents;
· R ₂ is 3 to 30 carbon atoms, preferably 3 to 20 carbon atoms, preferably contains 7 to 17 carbon atoms, straight or branched chain, saturated or unsaturated alkyl group Represents.

In an embodiment of the invention, the organomolybdenum complex is prepared by the following reaction:
(I) mono-, di- or triglyceride type fats (ie fatty acids),
(Ii) diethanolamine or 2-(2-aminoethyl)aminoethanol,
(Iii) and a source of molybdenum selected from trimolybdenum oxides or molybdates (preferably ammonium molybdate), in an amount sufficient to provide 0.1 to 20.0% molybdenum based on the weight of the complex.

  In a preferred embodiment of the invention, the organomolybdenum complex is constituted by at least one compound selected from formula (Ia) and formula (II-a), alone or as a mixture:

Wherein R ₁ contains 3 to 30 carbon atoms, preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms, and is linear or branched, saturated or unsaturated. Represents an alkyl group,

Wherein R ₁ contains 3 to 30 carbon atoms, preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms, and is linear or branched, saturated or unsaturated. Represents an alkyl group.

  In another embodiment, the organomolybdenum compound can be selected from molybdenum dithiophosphate or molybdenum dithiocarbamate.

  In a preferred embodiment of the invention, the organomolybdenum compound is selected from molybdenum dithiocarbamates.

  A molybdenum dithiocarbamate compound (Mo-DTC compound) is a complex formed by a metal nucleus linked to one or more ligands (ligands that are alkyl dithiocarbamate groups). These compounds are known to those skilled in the art.

  In an embodiment of the present invention, the Mo-DTC compound is 1-40% by mass, preferably 2-30% by mass, more preferably 3-28% by mass, advantageously 3-40% by mass, based on the total mass of the Mo-DTC compound. It is possible to contain 4 to 15% by weight of molybdenum.

  In another embodiment of the present invention, the Mo-DTC compound is 1-40% by weight, preferably 2-30% by weight, more preferably 3-28% by weight, based on the total weight of the Mo-DTC compound, advantageously Can contain 4 to 15% by weight of sulfur.

  In another embodiment of the present invention, the Mo-DTC compound has two molybdenum atoms in the center (so-called dimeric Mo-DTC) and three molybdenum atoms in the center. It can be selected from those (so-called trimer Mo-DTC).

In another embodiment of the present invention, Mo-DTC compound trimeric corresponds to the formula _Mo 3 _S k _{L n,} wherein:
K represents an integer of at least 4 or more, preferably in the range of 4 to 10, more preferably in the range of 4 to 7,
N is an integer in the range 1 to 4, and L is an alkyl dithiocarbamate group, said alkyl being 1 to 100 carbon atoms, preferably 1 to 40 carbon atoms, advantageously 3 Contains -20 carbon atoms.

  Examples of trimeric Mo-DTC compounds according to the invention include compounds as described in WO 98/26030 and US 2003/022954, and methods for their preparation. be able to.

  In a preferred embodiment of the invention, the Mo-DTC compound is a dimeric Mo-DTC compound. Examples of dimeric Mo-DTC compounds, such as those described in EP 0757093, EP 0719851, EP 0743354, or EP 1013749. Mention may be made of the compounds and their method of preparation.

  Dimeric Mo-DTC compounds generally correspond to compounds of the formula (III):

In the formula:
R ₃ , R ₄ , R ₅ and R ₆ are the same or different and independently represent a hydrocarbon group selected from alkyl, alkenyl, aryl, cycloalkyl and cycloalkenyl,
_{· X 3, X 4, X} 5 and _{X 6} are the same or different, represent independently an oxygen atom or a sulfur atom.

  In the context of the present invention, an alkyl group means a straight-chain or branched, saturated or unsaturated, hydrocarbon-containing group containing 1 to 24 carbon atoms. In an embodiment of the present invention, the alkyl group is methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl. , Tridecyl, isotridecyl, tetradecyl, hexadecyl, stearyl, icosyl, docosyl, tetracosyl, triacontyl, 2-ethylhexyl, 2-butyloctyl, 2-butyldecyl, 2-hexyloctyl, 2-hexyldecyl, 2-octyldecyl, 2-hexyl. It is selected from the group consisting of dodecyl, 2-octyldodecyl, 2-decyltetradecyl, 2-dodecylhexadecyl, 2-hexadecyloctadecyl, 2-tetradecyloctadecyl, myristyl, palmityl and stearyl.

  In the present invention, an alkenyl group means a straight or branched chain hydrocarbon containing group containing at least one double bond and containing 2 to 24 carbon atoms. The alkenyl group can be selected from vinyl, allyl, propenyl, butenyl, isobutenyl, pentenyl, isopentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tetradecenyl and oleic.

  In the context of the present invention, an aryl group means a polycyclic aromatic hydrocarbon or aromatic group, substituted or not with an alkyl group. The aryl group can contain from 6 to 24 carbon atoms. In one embodiment, the aryl group is phenyl, toluyl, xylyl, cumenyl, mesityl, benzyl, phenethyl, styryl, cinnamyl, benzhydryl, trityl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octyl. It can be selected from the group consisting of phenyl, nonylphenyl, decylphenyl, undecylphenyl, dodecylphenyl, phenylphenyl, benzylphenyl, phenyl-styrene, p-cumylphenyl and naphthyl.

  In the present invention, the cycloalkyl group and the cycloalkenyl group are groups formed by cyclopentyl, cyclohexyl, cycloheptyl, methylcyclopentyl, methylcyclohexyl, methylcycloheptyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, methylcyclopentenyl and methylcyclohexenyl. Can be selected from, but is not limited to. Cycloalkyl and cycloalkenyl groups can contain 3 to 24 carbon atoms.

In a preferred embodiment of the present _{invention, R 3, R 4, R} 5 and _{R 6} are the same or different, an alkenyl group containing alkyl group, or 2 to 24 carbon atoms including from 4 to 18 carbon atoms Express independently.

In an embodiment of the present invention, X ₃ , X ₄ , X ₅ and X ₆ may be the same or may represent a sulfur atom.

In another embodiment of the present invention, X ₃ , X ₄ , X ₅ and X ₆ may be the same or may be oxygen atoms.

In another embodiment of the invention X ₃ and X ₄ may represent sulfur atoms. Further, X ₅ and X ₆ may represent an oxygen atom.

In another embodiment of the invention X ₃ and X ₄ may represent an oxygen atom. Further, X ₅ and X ₆ may represent a sulfur atom.

  In another embodiment of the present invention, the ratio of the number of sulfur atoms to the number of oxygen atoms (S/O) of the Mo-DTC compound may be in the range of 1/3 to 3/1.

  In another embodiment of the present invention, the Mo-DTC compound of formula (III) can be selected from symmetrical Mo-DTC compounds, asymmetric Mo-DTC compounds and combinations thereof.

By symmetrical Mo-DTC compound according to the present invention is meant a Mo-DTC compound of formula (III) in which the R ₃ , R ₄ , R ₅ and R ₆ groups are identical.

The asymmetric Mo-DTC compound according to the present invention is a Mo-DTC compound of formula (III), wherein R ₃ and R ₄ have the same group, R ₅ and R ₆ have the same group, and R The groups ₃ and R ₄ mean compounds which are different from the groups R ₅ and R ₆ .

  In a preferred embodiment of the invention, the Mo-DTC compound is a mixture of at least one symmetrical Mo-DTC compound and at least one asymmetric Mo-DTC compound.

In an embodiment of the present invention R ₃ and R ₄ (they are the same) represent an alkyl group containing 5 to 15 carbon atoms; and R ₅ and R ₆ (they are the same and R ₃ And R ₄ are different from each other) represents an alkyl group containing 5 to 15 carbon atoms.

In a preferred embodiment of the invention R ₃ and R ₄ (which are identical) represent an alkyl group containing 6 to 10 carbon atoms; and R ₅ and R ₆ are 10 to 15 Represents an alkyl group containing a carbon atom.

In another preferred embodiment of the present invention, _{R 3} and _{R 4} (which are identical) is an alkyl group containing 10 to 15 carbon atoms; and, _{R 5} and _{R 6,} 6-10 Represents an alkyl group containing 4 carbon atoms.

In another preferred embodiment of the present invention, R ₃ , R ₄ , R ₅ and R ₆ (which are the same) have 5 to 15 carbon atoms, preferably 8 to 13 carbon atoms. Represents an included alkyl group.

Preferably, the Mo-DTC compound is selected from compounds of formula (III):
In the formula:
*X ₃ and X ₄ represent an oxygen atom,
*X ₅ and X ₆ represent a sulfur atom,
R ₃ represents an alkyl group containing 8 carbon atoms or an alkyl group containing 13 carbon atoms,
R ₄ represents an alkyl group containing 8 carbon atoms or an alkyl group containing 13 carbon atoms,
R ₅ represents an alkyl group containing 8 carbon atoms or an alkyl group containing 13 carbon atoms,
· R ₆ represents an alkyl group containing an alkyl group or 13 carbon atoms including 8 carbon atoms.

  Therefore, advantageously, the Mo-DTC compound is selected from compounds of formula (III-a).

In the formula, R ₃ , R ₄ , R ₅ and R ₆ have the same definition as in formula (III).

More advantageously, the Mo-DTC compound is a mixture of the following compounds:
A Mo-DTC compound of formula (III-a), wherein R ₃ , R ₄ , R ₅ and R ₆ represent an alkyl group containing 8 carbon atoms,
A Mo-DTC compound of formula (III-a), wherein R ₃ , R ₄ , R ₅ and R ₆ represent an alkyl group containing 13 carbon atoms,
A Mo-DTC compound of formula (III-a), wherein R ₃ and R ₄ represent an alkyl group containing 13 carbon atoms; and R ₅ and R ₆ are 8 Represents an alkyl group containing carbon atoms and/or is a Mo-DTC compound of formula (III-a), wherein R ₃ and R ₄ represent an alkyl group containing 8 carbon atoms; And R ₅ and R ₆ represent an alkyl group containing 13 carbon atoms.

  Examples of Mo-DTC compounds are Molyvan L, Molyvan 807, Molyvan 822 manufactured by RTVanderbilt and Sakura-lube 200, Sakura-lube 165, Sakura-lube 525 or Sakura-lube 600 manufactured by Adeka. Can be mentioned.

  In an embodiment of the invention, the amount by weight of organomolybdenum compound is 0.05 to 3%, preferably 0.1 to 2%, advantageously 0.1 to 3%, based on the total weight of the lubricant composition. It is in the range of 1%.

(Dithiophosphate group-containing compound)
The lubricant composition according to the invention comprises at least one compound containing dithiophosphate groups. For the sake of simplicity of description, compounds containing a dithiophosphate group are hereinafter referred to as so-called "dithiophosphates" in the present specification.

  The dithiophosphates can be selected from, but not limited to, ammonium dithiophosphates, amine dithiophosphates, ester dithiophosphates and metal dithiophosphates, alone or as a mixture.

  In an embodiment of the invention the dithiophosphate is selected from ammonium dithiophosphates of formula (IV):

In the formula, R ₇ and R ₈ independently of each other represent an optionally substituted hydrocarbon-containing group containing 1 to 30 carbon atoms.

In a preferred embodiment of the invention R ₇ and R ₈ independently of one another, have 2 to 24 carbon atoms, more preferably 3 to 18 carbon atoms, advantageously 5 to 12 carbon atoms. It represents an optionally substituted hydrocarbon-containing group.

In another preferred embodiment of the present invention, R ₇ and R ₈ are independently of each other an unsubstituted hydrocarbon-containing group (wherein said hydrocarbon-containing group can be alkyl, alkenyl, alkynyl, phenyl or benzyl). ) Is represented.

In another preferred embodiment of the present invention, R ₇ and R ₈ are, independently of each other, an alkyl group containing a straight or branched chain hydrocarbon, more preferably an alkyl group containing a straight chain hydrocarbon. Represents a group.

In another preferred embodiment of the invention R ₇ and R ₈ are independently of each other optionally substituted with at least one oxygen, nitrogen, sulfur and/or phosphorus atom, preferably at least one oxygen atom. Represents a hydrocarbon-containing group.

  As examples of ammonium dithiophosphates, mention may be made of dimethylammonium dithiophosphate, diethylammonium dithiophosphate and dibutylammonium dithiophosphate.

  In another embodiment of the invention the dithiophosphate is selected from amine dithiophosphates of general formula (V):

In the formula:
· R ₉ and R ₁₀ are, independently of one another, comprise from 1 to 30 carbon atoms, it represents a hydrocarbon-containing group optionally substituted,
R ₁₁ , R ₁₂ and R ₁₃ independently of each other represent a hydrogen atom or a hydrocarbon-containing group of 1 to 30 carbon atoms (at least one of R ₁₁ , R ₁₂ and R ₁₃ represents a hydrogen atom). No).

In a preferred embodiment of the invention, R ₉ and R ₁₀ independently of one another, have 2 to 24 carbon atoms, more preferably 3 to 18 carbon atoms, advantageously 5 to 12 carbon atoms. Represents a hydrocarbon-containing group, including and optionally substituted.

In another preferred embodiment of the present invention, R ₉ and R ₁₀ independently of each other represent an unsubstituted hydrocarbon-containing group, said hydrocarbon-containing group being alkyl, alkenyl, alkynyl, phenyl or benzyl. It may be.

In another preferred embodiment of the invention R ₉ and R ₁₀ independently of one another represent a straight or branched chain hydrocarbon-containing alkyl group, more preferably a straight-chain hydrocarbon-containing alkyl group.

In another preferred embodiment of the invention R ₉ and R ₁₀ are independently of each other optionally substituted with at least one oxygen, nitrogen, sulfur and/or phosphorus atom, preferably at least one oxygen atom. Represents a hydrocarbon-containing group.

In another preferred embodiment of the present _invention, R _{11, R 12} and _{R 13} are, independently of one another, from 2 to 24 carbon atoms, more preferably 3 to 18 carbon atoms, advantageously 5 to 12 Represents a hydrocarbon containing group containing 4 carbon atoms.

  In another embodiment of the present invention the dithiophosphate is selected from ester dithiophosphates of general formula (VI):

In the formula:
R ₁₄ and R ₁₅ independently of each other represent an optionally substituted hydrocarbon-containing group containing 1 to 30 carbon atoms,
· _{R 16} and _{R 17} are, independently of one another, represent a hydrocarbon-containing radical containing 1 to 18 carbon atoms.

In a preferred embodiment of the invention R ₁₄ and R ₁₅ independently of one another have 2 to 24 carbon atoms, more preferably 3 to 18 carbon atoms, advantageously 5 to 12 carbon atoms. It represents an optionally substituted hydrocarbon-containing group.

In another preferred embodiment of the invention, R ₁₄ and R ₁₅ independently of one another represent an unsubstituted hydrocarbon-containing group, said hydrocarbon-containing group being alkyl, alkenyl, alkynyl, phenyl or benzyl. It may be.

In another preferred embodiment of the present invention, R ₁₄ and R ₁₅ independently of each other represent a linear or branched hydrocarbon-containing alkyl group, more preferably a linear hydrocarbon-containing alkyl group.

In another preferred embodiment of the invention R ₁₄ and R ₁₅ are independently of each other optionally substituted with at least one oxygen, nitrogen, sulfur and/or phosphorus atom, preferably at least one oxygen atom. Represents a hydrocarbon-containing group.

In another preferred embodiment of the invention R ₁₄ and R ₁₅ independently of one another represent a hydrocarbon-containing radical containing 2 to 6 carbon atoms.

In another preferred embodiment of the invention R ₁₆ and R ₁₇ independently of one another represent a hydrocarbon-containing radical containing 2 to 6 carbon atoms.

  In another embodiment of the invention the dithiophosphate is selected from the metal dithiophosphates of general formula (VII):

In the formula:
R ₁₈ and R ₁₉ independently of each other represent an optionally substituted hydrocarbon-containing group containing 1 to 30 carbon atoms,
• M represents a metal cation, and • n is the valence of this metal cation.

  In a preferred embodiment of the invention, the metal is zinc, aluminum, copper, iron, mercury, silver, cadmium, tin, lead, antimony, bismuth, thallium, chromium, molybdenum, cobalt, nickel, tungsten, sodium, calcium, magnesium. , Manganese and arsenic. Preferred metals are zinc, molybdenum, antimony (preferably zinc and molybdenum).

  In the preferred embodiment of the invention, the metal is zinc.

  Mixtures of metals may be used. The metal dithiophosphate may be neutral, as illustrated by formula (VII), or alkaline, such as when a stoichiometric excess of metal is present.

In a preferred embodiment of the invention R ₁₈ and R ₁₉ independently of one another, have 2 to 24 carbon atoms, more preferably 3 to 18 carbon atoms, advantageously 5 to 12 carbon atoms. It represents an optionally substituted hydrocarbon-containing group.

In another preferred embodiment of the present invention, R ₁₈ and R ₁₉ independently of one another represent an unsubstituted hydrocarbon-containing group, said hydrocarbon-containing group being alkyl, alkenyl, alkynyl, phenyl or benzyl. It may be.

In another preferred embodiment of the present invention, R ₁₈ and R ₁₉ independently of each other represent a linear or branched hydrocarbon-containing alkyl group, more preferably a linear hydrocarbon-containing alkyl group.

In another preferred embodiment of the invention R ₁₈ and R ₁₉ are independently of each other optionally substituted with at least one oxygen, nitrogen, sulfur and/or phosphorus atom, preferably at least one oxygen atom. Represents a hydrocarbon-containing group.

  Preferably, the dithiophosphate according to the present invention is a zinc dithiophosphate of formula (VII-a) or formula (VII-b):

In the formula, R ₁₈ and R ₁₉ are the same as defined above.

  Examples of the metal dithiophosphate according to the present invention include Additin RC 3038, Additin RC 3045, Additin RC 3048, Additin RC 3058, Additin RC 3080, Additin RC 3180, Additin RC 3212, Additin RC 3580, Kikulube Z112, Lubrizol 1371, Lubrizol 1375, Lubrizol 1395, Lubrizol 5179, Oloa 260, Oloa 267 are mentioned.

  In an embodiment of the invention, the amount by weight of dithiophosphate is 0.1-5%, preferably 0.1-3%, advantageously 0.5-2, based on the total weight of the lubricant composition. % Range.

(Aliphatic triamine)
The lubricant composition according to the invention comprises at least one aliphatic triamine.

  Aliphatic triamines are mainly obtained from carboxylic acids. The starting fatty acids for obtaining the aliphatic triamine according to the invention are myristic acid, pentadecyl acid, palmitic acid, margaric acid, stearic acid, nonadecyl acid, arachidic acid, heneicosanoic acid, behenic acid, tricosanoic acid, lignoceric acid, pentacosanoic acid, Cerotic acid, heptacosanoic acid, montanic acid, nonacosanoic acid, melissic acid, hentriacontanoic acid, laxeric acid; or palmitooleic acid, oleic acid, erucic acid, nervonic acid, linoleic acid, α-linolenic acid, gamma-linolenic acid It can be selected from unsaturated fatty acids such as acids, di-homo-gamma-linolenic acid, arachidonic acid, eicosapentaenoic acid, docosahexaenoic acid.

  Preferred fatty acids are derived from hydrolysates of triglycerides in plant or animal oils such as coconut oil, palm oil, olive oil, peanut oil, rapeseed oil, sunflower oil, soybean oil, cottonseed oil, linseed oil, beef tallow and the like. It is possible. Natural oils may be genetically modified to increase the amount of certain fatty acids therein. For example, rapeseed oil or oleic sunflower oil can be mentioned.

  In an embodiment of the present invention, the aliphatic triamine can be obtained from natural plant or animal sources.

In another embodiment of the present invention, the aliphatic triamine is selected from the compounds of formula _{(VIII): R 20 -N -} [(CH 2) 3 -NH 2] 2 (VIII)
Wherein R ₂₀ contains at least 10 carbon atoms, preferably 10 to 22 carbon atoms, more preferably 14 to 22 carbon atoms, advantageously 16 to 20 carbon atoms, It also represents a branched, saturated or unsaturated alkyl group.

In a preferred embodiment of the present invention, R ₂₀ includes a 16 to 18 carbon atoms, mono comprises at least one saturated alkyl group and 16 to 18 carbon atoms, - represents a mixture of unsaturated alkyl groups.

In another embodiment of this invention the aliphatic triamine is selected from the compound of formula (IX):
_{R 21 -NH- (CH 2 -CH 2} -CH 2 -NH) 2 -H (IX)
Wherein R ₂₁ contains at least 10 carbon atoms, preferably 10 to 22 carbon atoms, more preferably 14 to 22 carbon atoms, advantageously 16 to 20 carbon atoms. It also represents a branched, saturated or unsaturated alkyl group.

  In an embodiment of the invention, the amount by weight of aliphatic triamine is 0.1-5%, preferably 0.1-3%, advantageously 0.5-2%, based on the total weight of the composition. The range is.

  In another embodiment of the invention, the lubricant composition has a mass ratio (organo molybdenum compound/aliphatic triamine) of 1/10 to 1, preferably 1/5 to 4/5.

  In another embodiment of the invention, the lubricant composition has a mass ratio (organo molybdenum compound/compound containing dithiophosphate groups/aliphatic triamine) of 1/10/10 to 1/1/1, preferably 1 It has /5/5 to 4/5/5.

(Base oil)
The lubricant compositions according to the invention may comprise any type of lubricating base oil suitable for their use (mineral, synthetic or natural, animal or plant based).

  The at least one base oil incorporated into the lubricant composition according to the present invention is a mineral or synthetic derived base oil (or equivalent of the ATIEL classification) of Groups 1-5 of the API classification summarized below. It can be a single substance or a mixture of such base oils.

  In the mineral base oil according to the present invention, after the crude oil is subjected to atmospheric distillation or reduced pressure distillation, purification steps such as solvent extraction, deasphalting, solvent dewaxing, hydrogenation treatment, hydrocracking/hydroisomerization, hydrofinishing, etc. Includes all types of base oils obtained by passing through.

  The base oil of the composition according to the invention may further be a synthetic oil such as certain esters of carboxylic acids and alcohols or polyalphaolefins. The polyalphaolefins used as base oils are obtained, for example, from monomers having 4 to 32 carbon atoms (eg octene, decene) and have a viscosity at 100° C. (measured according to ASTM D 445 standard). ) Is 1.5 to 15 cSt. Their average molecular weight is typically 250 to 3000, according to the ASTM D5296 standard. Mixtures of synthetic oils and mineral oils can also be used.

  In order to produce the lubricant composition according to the invention, it has suitable properties (in particular viscosity, viscosity index, sulfur content, oxidation resistance) for use in vehicle engines, preferably motor vehicle engines. There is no limitation on the use of one lubricious base (base oil) or another base (base oil), except that it must be present.

  In an embodiment of the invention, the content of the lubricating base (base oil) is at least 50%, preferably at least 60%, or at least 70% by weight, based on the total weight of the lubricant composition. is there. Typically, the content of the lubricating base material (base oil) is 75 to 99.9% by mass, based on the total mass of the lubricant composition according to the present invention.

  In a preferred embodiment of the present invention, the lubricant composition comprises a Group 1 and/or Group 3 mineral base, or a Group 4 synthetic base according to the API classification.

  In another preferred embodiment of the present invention, the lubricant composition has a kinematic viscosity at 100° C. measured by ASTM D445 of 4 to 25 cSt, preferably 5 to 22 cSt, advantageously 5 to 13 cSt.

  In another preferred embodiment of the present invention, the lubricant composition has a viscosity index (VI) of 140 or greater, preferably 150 or greater, as measured by ASTM 2270.

(Other additives)
The lubricant composition according to the invention comprises at least one selected from detergents, antiwear agents different from dithiophosphates, extreme pressure additives, dispersants, pour point improvers, defoamers, thickeners and mixtures thereof. It may further comprise one additive.

  In one embodiment, the lubricant composition may further comprise at least one antioxidant. Antioxidants slow the deterioration of lubricant compositions during use, especially during use of engine oils. Deterioration of the lubricant composition results, inter alia, in the formation of deposits, the presence of sludge, or an increase in the viscosity of the lubricant composition, especially engine oil. Antioxidants act in particular as radical inhibitors or hydroperoxide destroyers. Among the commonly used antioxidants, mention may be made of phenolic or amine antioxidants, phosphorus-containing antioxidants and sulfur-containing antioxidants. Some of these antioxidants (eg, phosphorus-containing antioxidants and sulfur-containing antioxidants) may produce ash. The phenolic antioxidant may be ashless or may be in the form of neutral or alkaline metal salts.

Antioxidants are in particular sterically hindered phenols, esters of sterically hindered phenols, hindered phenols containing thioether bridges, diphenylamines, diphenylamines substituted with at least one C1-C12 alkyl group, N,N'-dialkyl. It can be selected from aryl diamines, and combinations thereof. In the context of the present invention, a sterically hindered phenol means that at least one adjacent carbon, which is adjacent to the carbon to which the alcohol functional group is bonded, has at least one C1-C10 alkyl group, preferably C1-C6 alkyl group, preferably C4 alkyl. By a group, preferably a compound containing a phenol group substituted with a tert-butyl group is meant. Another example of an antioxidant is an amine compound, which can optionally be used in combination with a phenolic antioxidant. Typical examples are aromatic amines of the formula _R 22 _R 23 _{R 24} N. In the formula, R ₂₂ represents an aliphatic group or an optionally substituted aromatic group, R ₂₃ represents an optionally substituted aromatic group, R ₂₄ represents a hydrogen atom, an alkyl group, an aryl group or the formula R ₂₅ A group represented by S(O) _z R ₂₆ (wherein R ₂₅ represents an alkylene group or an alkenylene group, R ₂₆ represents an alkyl group, an alkenyl group or an aryl group, and z is an integer equal to 0, 1 or 2). Represents). Sulfurized alkylphenols or their alkali metal or alkaline earth metal salts can also be used as antioxidants. Another example of an antioxidant is a copper compound, which may be, for example, copper thiophosphate or copper dithiophosphate, a copper salt of a carboxylic acid, copper dithiocarbamate, copper sulfonate, copper phenate, copper acetylacetonate and the like. Copper(I) and copper(II) salts of succinic acid or succinic anhydride can also be used.

  The lubricant composition according to the present invention can comprise any type of antioxidant known to those skilled in the art. Preferably, ashless antioxidants are used.

  In one embodiment, the lubricant composition according to the invention may comprise 0.5-2% by weight of at least one antioxidant, based on the total weight of the lubricant composition.

  In one embodiment, the lubricant composition according to the present invention may further comprise a detergent. Detergents particularly reduce the formation of deposits on the surface of metal parts by dissolving by-products of oxidation and combustion. The detergents that can be used in the lubricant composition according to the invention are known to those skilled in the art. Detergents commonly used in the formulation of lubricant compositions can be anionic compounds that include a lipophilic long chain hydrocarbon containing chain and a hydrophilic head. The cation bound is typically an alkali metal or alkaline earth metal cation. The detergent is preferably selected from alkali metal salts or alkaline earth metal salts of carboxylic acids, sulphonates, salicylates, naphthenates and even phenates. The alkali metal or alkaline earth metal is preferably calcium, magnesium, sodium or barium. These metal salts can contain metal in an amount that is approximately equal to or in excess of the stoichiometric amount (greater than the stoichiometric amount). In the latter case, these detergents are called overbased detergents. The excess amount of metal which imparts its overbasing to the detergent is present in the form of oil-insoluble metal salts such as carbonates, hydroxides, oxalates, acetates, glutamates, preferably carbonates.

  In one embodiment, the lubricant composition according to the invention may comprise from 2 to 4% by weight of detergent, based on the total weight of the lubricant composition.

  In one embodiment, the lubricant composition according to the present invention may further comprise at least one pour point depressant. Pour point depressants specifically improve the low temperature behavior of lubricant compositions by slowing the formation of paraffin crystals. Examples of pour point depressants include polyalkylmethacrylates, polyacrylates, polyarylamides, polyalkylphenols, polyalkylnaphthalenes, alkylated polystyrenes.

  In one embodiment, the lubricant composition according to the invention can further comprise at least one dispersant. The dispersant can be selected from the group formed by Mannich base(s).

  In one embodiment, the lubricant composition according to the invention may comprise from 0.2 to 10% by weight of dispersant, based on the total weight of the lubricant composition.

  In one embodiment, the lubricant composition may further comprise at least one viscosity index improving polymer. These polymers include polymer esters, ethylene-propylene copolymers, styrene homo- or copolymers, butadiene homo- or copolymers, or isoprene homo- or copolymers (these homo- or co-polymers). The polymer may be hydrogenated or non-hydrogenated) and also polymethacrylate (PMA).

  In one embodiment, the lubricant composition according to the present invention may comprise 1 to 15% by weight of viscosity index improving polymer, based on the total weight of the lubricant composition.

In an embodiment of the invention, the lubricant composition comprises:
At least one base oil 75-99.75%,
At least one organomolybdenum compound 0.05-3%,
0.1-5% of at least one compound containing a dithiophosphate group,
-At least one aliphatic triamine 0.1-5%.

In another embodiment of the invention, the lubricant composition comprises:
At least one base oil 75-99.25%,
At least one organomolybdenum compound 0.05-3%,
0.1-5% of at least one compound containing a dithiophosphate group,
At least one aliphatic triamine 0.1-5%,
-0.5-5% of at least one other additive.

In another embodiment of the invention, the lubricant composition consists essentially of:
At least one base oil 75-99.75%,
At least one organomolybdenum compound 0.05-3%,
0.1-5% of at least one compound containing a dithiophosphate group,
-At least one aliphatic triamine 0.1-5%.

In another embodiment of the invention, the lubricant composition consists essentially of:
At least one base oil 75-99.25%,
At least one organomolybdenum compound 0.05-3%,
0.1-5% of at least one compound containing a dithiophosphate group,
At least one aliphatic triamine 0.1-5%,
-0.5-5% of at least one other additive.

  All of the properties and suitable configurations shown for base oils, organomolybdenum compounds, compounds containing dithiophosphate groups, aliphatic triamines and additional additives still apply to the lubricant compositions described above.

  In an embodiment of the invention, the lubricant composition is not an emulsion.

  In another embodiment of the invention, the lubricant composition is anhydrous.

  Furthermore, an object of the invention is an engine oil comprising the lubricant composition according to the invention.

  All of the properties and suitable configurations shown for lubricant compositions according to the invention also apply to engine oils.

  In an embodiment of the invention, the engine oil may be grade 0W-20 and 5W-30 according to the SAE J300 classification, kinematic viscosity (KV100) 5.6-12.100 measured at 100° C. according to international ASTM D445. Characterized by 5 cSt.

  In another embodiment of the invention, it is possible to characterize engine oils by a viscosity index of 130 or higher, preferably 150 or higher, calculated according to the international ASTM D2230.

  For formulating engine oils, advantageously base oils having a sulfur content of less than 0.3% (for example group 3 mineral oils) and sulfur-free synthetic base oils (preferably group 4 base oils), or Mixtures thereof may be used.

  Furthermore, an object of the invention is the use of a lubricant composition as defined above for lubricating mechanical parts, in particular mechanical parts in transmission and/or vehicle engines (preferably motor vehicle engines). Is.

  Furthermore, an object of the invention is a lubricant composition as defined above for reducing the friction between two steel surfaces, in particular between two steel surfaces in a vehicle engine (preferably a motor vehicle engine). Is the use of.

  Further, it is an object of the present invention to provide a lubricant composition as described above for reducing friction between a steel surface and a carbon coated surface, especially in a vehicle engine (preferably an automotive vehicle engine). Is in use.

  Furthermore, an object of the invention is a lubricant as defined above for reducing the friction between two carbon coated surfaces, especially between two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine). Use of the composition.

  Carbon coating according to the present invention means any coating containing carbon.

  These carbon coatings can be selected from diamond coatings and more particularly nanodiamond coatings.

  Such a coating may be present in particular in the form of at least one nanocrystalline diamond layer (a nanocrystalline diamond layer having a purity of 70-99%).

  In an embodiment of the invention, the carbon coating has a purity of 70-99%, preferably 70-97%, advantageously 75% and a thickness of 0.1-3 μm, preferably 0.5-2 μm, advantageously. Are selected from nanodiamond coatings in the form of at least one nanocrystalline diamond layer having a thickness of 1.5 μm.

  These carbon coatings can also be selected from DLC (diamond like carbon) type coatings.

  Any type of DLC coating can be used as the carbon coating according to the present invention.

  DLC comprises a series of amorphous materials containing essentially carbon. In these groups, two groups are mainly known and used: hydrogenated DLC (especially hydrogenated DLC known as aC:H) and non-hydrogenated DLC (especially as aC). Non-hydrogenated DLC known, or non-hydrogenated DLC known as ta-C).

DLC has the property of varying with sp ³ hybrid carbon content and hydrogen content. In some variants of DLC, metallic elements such as iron, chromium or tungsten may be doped.

  Because they are amorphous materials, DLC coatings are generally less mechanically durable and heat resistant as compared to diamond coatings. However, they are generally less unstable and are particularly applicable at low temperatures to most substrates.

  In an embodiment of the invention, the DLC is selected from hydrogenated DLC (especially hydrogenated DLC known as aC:H).

  In a preferred embodiment of the invention, the DLC is selected from hydrogenated DLC containing 10 to 40% hydrogen, especially the hydrogenated DLC known as aC:H.

  The use described above makes it possible not to worsen or even further reduce the wear between two steel surfaces, in particular between two steel surfaces in a vehicle engine (preferably a motor vehicle engine).

  The use described above makes it possible not to further aggravate or to further reduce the wear between the steel surface and the carbon-coated surface, in particular in the vehicle engine (preferably motor vehicle engine).

  The use described above makes it possible not to further aggravate or even reduce the wear between two carbon-coated surfaces, in particular between two carbon-coated surfaces in a vehicle engine (preferably a motor vehicle engine).

  The invention further relates to the use of a lubricant composition as defined above for reducing the fuel economy of a vehicle, preferably a motor vehicle.

  All the properties and suitable configurations presented for the lubricant composition also apply to the abovementioned uses.

  The invention further relates to a method for the lubrication of a mechanical part, in particular a mechanical part in a transmission and/or a vehicle engine (preferably a motor vehicle engine), the method being defined at least in part above. At least one step of contacting with such a lubricant composition.

  Furthermore, an object of the present invention is a method of reducing the friction between two steel surfaces, in particular in a vehicle engine (preferably a motor vehicle engine), which method comprises at least one of the steel surfaces. With at least one step of contacting with a lubricant composition as defined above.

  Furthermore, an object of the present invention is a method for reducing the friction between a steel surface and a carbon coated surface, in particular a steel surface and a carbon coated surface in a vehicle engine (preferably an automotive vehicle engine), said method comprising: At least one of the steps of: contacting a lubricant composition as defined above.

  Furthermore, an object of the present invention is a method of reducing the friction between two carbon coated surfaces, especially between two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine), the method comprising: Comprising at least one step of contacting at least one with a lubricant composition as defined above.

  The method described above makes it possible to prevent or even further reduce the wear between two steel surfaces, in particular in a vehicle engine (preferably an automotive vehicle engine).

  The method described above makes it possible to prevent or even further reduce wear between the steel surface and the carbon-coated surface, especially between the steel surface and the carbon-coated surface in a vehicle engine (preferably a motor vehicle engine).

  The method described above makes it possible to prevent or even further reduce the wear between two carbon-coated surfaces, especially between two carbon-coated surfaces in a vehicle engine (preferably a motor vehicle engine).

  Furthermore, an object of the present invention is a method of reducing the fuel economy of a vehicle, preferably a motor vehicle, which method comprises contacting a mechanical part of a vehicle engine with a lubricant composition as defined above. At least one step is included.

  All the properties and suitable configurations shown for the lubricant composition also apply to the above method.

  The vehicle can include a two-stroke or four-stroke internal combustion engine.

  The engine may be a gasoline engine or a diesel engine for being supplied to a standard gasoline engine or a standard diesel engine. By "standard gasoline engine" or "standard diesel engine" is meant in the present invention the engine to which the fuel obtained after refining an oil of mineral origin (eg petroleum) is fed. The engine may further be a gasoline or diesel engine modified to supply oil-based or biodiesel fuels derived from renewable materials such as alcohol-based fuels.

  Vehicles can be light vehicles such as cars and motorcycles. Vehicles can also be heavy duty vehicles, utility vehicles and ships.

  Furthermore, it is an object of the present invention to reduce friction between two steel surfaces, in particular between two steel surfaces in a vehicle engine (preferably a motor vehicle engine), at least one base oil, at least one organomolybdenum. The use of an aliphatic triamine in a lubricant composition comprising a compound and at least one compound containing a dithiophosphate group.

  Furthermore, it is an object of the present invention to reduce at least one base oil, at least for reducing friction between the steel surface and the carbon coated surface, especially in the vehicle engine (preferably motor vehicle engine). The use of an aliphatic triamine in a lubricant composition comprising one organomolybdenum compound and at least one compound containing a dithiophosphate group.

  Furthermore, it is an object of the present invention to reduce friction between two carbon coated surfaces, in particular between two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine), at least one base oil, at least one base oil. The use of an aliphatic triamine in a lubricant composition comprising an organomolybdenum compound and at least one compound containing a dithiophosphate group.

  The use as described above makes it possible to do not worsen or even reduce the wear between two steel surfaces, especially between two steel surfaces in a vehicle engine (preferably a motor vehicle engine).

  The use described above makes it possible for the wear between the steel surface and the carbon-coated surface, in particular between the steel surface and the carbon-coated surface in a vehicle engine (preferably a motor vehicle engine), not to worsen or to reduce further. ..

  The use described above makes it possible to do not worsen or even reduce the wear between two carbon-coated surfaces, especially between two carbon-coated surfaces in a vehicle engine (preferably a motor vehicle engine).

  Furthermore, it is an object of the invention to provide a lubricant comprising at least one base oil, at least one organomolybdenum compound and at least one compound comprising a dithiophosphate group for reducing the fuel economy of a vehicle, preferably a motor vehicle. The use of an aliphatic triamine in the composition.

  All of the properties and preferred configurations shown for base oils, aliphatic triamines, organomolybdenum compounds, and compounds containing dithiophosphate groups still apply to the above-mentioned applications.

The invention further relates to an additive concentrate-type composition comprising:
· At least one organomolybdenum compound,
At least one compound containing a dithiophosphate group, and at least one aliphatic triamine.

  All of the properties and preferred configurations shown for aliphatic triamines, organomolybdenum compounds, and compounds containing dithiophosphate groups also apply to the additive concentrate-type compositions described above.

  In an embodiment of the invention, the additive concentrate-type composition further comprises at least one additional additive. The additional additives can be selected from those mentioned above.

  In an embodiment of the present invention, at least one base oil may be added to the additive concentrate type composition according to the present invention to obtain the lubricant composition according to the present invention.

  The invention and the various objects of their practice will be better understood by reading the following examples. These examples are merely examples and do not limit the present invention.

(Example 1)
No. 1 to No. Lubricant compositions up to 6 have been prepared from the following compounds:
Group 3 base oil having a viscosity of 4.3 cSt measured at 100° C. according to ASTM D445,
Dithiophosphate group-containing compound: zinc dithiophosphate (Lz 1371 manufactured by Lubrizol),
Organomolybdenum compound 1: an organomolybdenum complex of formula (Ia), wherein R ₁ represents a hydrocarbon radical containing 11 carbon atoms (Molyvan 855 manufactured by Vanderbilt),
Organic molybdenum compound 2: molybdenum dithiocarbamate (Sakura-lube 525 manufactured by Adeka),
An aliphatic triamines-formula (VIII), _{wherein, R 20} is, (Triameen YT produced by AKZO) representing a hydrocarbon group containing 16 to 18 carbon atoms.

  No. 1 to No. Lubricant compositions up to 6 are described in Table 2; the percentages given are weight percentages.

(Test 1: Evaluation of friction characteristics of lubricant composition during steel/steel contact)
Lubricant composition No. 1, No. 2 and No. The friction properties at steel/steel contact of No. 4 are evaluated by measuring the coefficient of friction.
The coefficient of friction is evaluated using a ball-on-flat linear tribometer under the following conditions:
・Steel grade: 100c6
・Temperature: 80℃,
・5N regular load,
-Movement 5 mm.

  A difference of at least 0.01 between the two friction coefficient values is taken into account as having an important significance for indicating the effect on the friction coefficient.

  Table 3 shows the lubricant composition No. 1, No. 2 and No. 4 shows a friction coefficient of 4.

  These results show the following: The lubricant composition No. 1 according to the present invention. No. 4 contains the organomolybdenum compound according to the invention and a compound containing a dithiophosphate group according to the invention, but compared to a lubricant composition according to the invention without an aliphatic triamine (composition No. 2). The friction characteristics of steel contact were improved.

  In addition to the results regarding the coefficient of friction, the lubricant composition No. Compared with No. 2, lubricant composition No. 2 according to the present invention. It was observed that the use of 4 did not worsen the wear on the surface of the ball.

(Test 2: Evaluation of friction characteristics of lubricant composition during DLC/steel contact)
Lubricant composition No. 1, No. 2, No. 4 and No. The friction properties at DLC/steel contact of 6 are evaluated by measuring the coefficient of friction.

The coefficient of friction is evaluated using a DLC ball/steel plane linear friction meter under the following conditions:
・Steel grade: 100c6,
DLC coating properties of balls: Hydrogenated DLC (a-C:H) containing 31-33% hydrogen and having a molecular ratio (sp ² carbon/sp ³ carbon) 55/45.
-Thickness of DLC layer: 1.5 μm,
・Temperature: 110℃,
・5N regular load,
-Movement 10 mm.

  A difference of at least 0.01 between two friction coefficient values is taken into account as having an important significance for indicating the effect on the friction coefficient.

  Table 4 shows the lubricant composition No. 1, No. 2, No. 4 and No. 6 shows a friction coefficient of 6.

  These results show the following: The lubricant composition No. 1 according to the present invention. 4 contains an organomolybdenum compound according to the invention and a compound containing a dithiophosphate group according to the invention, but without an aliphatic triamine according to the invention (composition No. 2), and according to the invention. Improved friction at DLC/steel contact as compared to a lubricant composition (composition No. 6) containing an aliphatic triamine but not an organomolybdenum compound according to the invention and a compound containing a dithiophosphate group according to the invention. It has characteristics.

  Lubricant composition No. 2 and No. The friction coefficient of No. 6 is the lubricant composition No. 6 of the present invention. It is worth noting that the coefficient of friction is higher than 4. It therefore demonstrates the synergistic effect of the combination of an organomolybdenum compound according to the invention, a compound containing a dithiophosphate group according to the invention, and an aliphatic triamine according to the invention for reducing the friction during DLC/steel contact.

  Along with the results regarding the coefficient of friction, the lubricant composition No. 2 and No. Compared to No. 6, the lubricant composition No. 6 according to the present invention. It was observed that the use of 4 did not worsen the wear of the DLC coating on the balls.

(Test 3: Evaluation of friction characteristics of lubricant composition during DLC/steel contact)
Lubricant composition No. 1, No. 2 and No. The friction properties at DLC/steel contact of 4 are evaluated by measuring the coefficient of friction.
The coefficient of friction is evaluated using a DLC ball/steel plane HFFR tribometer under the following conditions:
・Steel grade: 100c6
DLC coating properties: hydrogenated DLC (a-C:H) containing 31-33% hydrogen and having a molecular ratio (sp ² carbon/sp ³ carbon) 55/45.
-Thickness of DLC layer: 1.5 μm,
・Temperature: 110℃,
-Frequency: 20 Hz.

  A difference of at least 0.01 between two friction coefficient values is taken into account as having an important significance for indicating the effect on the friction coefficient.

  Table 5 shows the lubricant composition Nos. 1, No. 2 and No. 4 shows a friction coefficient of 4.

  These results corroborate the results of Test 2; in fact, the results obtained demonstrate the following: That is, the lubricant composition No. 1 according to the present invention. 4 contains DLC/compared to the lubricant composition (composition No. 2) containing the organomolybdenum compound according to the present invention and the compound containing a dithiophosphate group according to the present invention, but containing no aliphatic triamine according to the present invention. It has improved frictional properties for steel contact.

(Test 4: Evaluation of friction characteristics of lubricant composition during DLC/steel contact)
Lubricant composition No. 1, No. 3 and No. The friction properties at DLC/steel contact of 5 are evaluated by measuring the coefficient of friction. The coefficient of friction is evaluated by the method described in Test 3.

  A difference of at least 0.01 between two friction coefficient values is taken into account as having an important significance for indicating the effect on the friction coefficient.

  Table 6 shows the lubricant composition No. 1, No. 3 and No. 5 shows a friction coefficient of 5.

  These results corroborate the results of Test 2 and Test 3; in fact, these results demonstrate the following: The lubricant composition No. 1 according to the present invention. No. 5 comprises an organomolybdenum compound 2 according to the invention and a compound containing a dithiophosphate group according to the invention in the presence of an organomolybdenum compound 2 different from the organomolybdenum compound 1 but without an aliphatic triamine according to the invention. It has improved friction properties for DLC/steel contact as compared to the agent composition (Composition No. 3).

(Example 2)
No. 7 to No. Up to 10 lubricant compositions have been prepared from the following compounds:
A poly-alpha olefin type oil having a viscosity of 4 cSt measured at 100° C. according to ASTM D445,
Compounds containing dithiophosphate groups: zinc dithiophosphate (Lz 1371 manufactured by Lubrizol),
Organomolybdenum compound 1: an organomolybdenum complex of formula (Ia) (Molyvan 855 manufactured by Vanderbilt). In the formula, R ₁ represents a hydrocarbon group containing 11 carbon atoms,
An aliphatic triamine of formula (VIII) (Triameen YT manufactured by AKZO). In the formula,
R ₂₀ represents a hydrocarbon group containing 16 to 18 carbon atoms.

  No. 7 to No. Lubricant compositions up to 10 are listed in Table 7; the percentages given are weight percentages.

(Test 5: Evaluation of friction properties of lubricant composition during steel/steel contact)
Lubricant composition No. 7, No. 8, No. 9 and No. The friction properties at 10 steel/steel contacts are evaluated by measuring the coefficient of friction. The coefficient of friction is evaluated by the method described in Test 1.

  A difference of at least 0.01 between two friction coefficient values is taken into account as having an important significance for indicating the effect on the friction coefficient.

  Table 8 shows the lubricant composition No. 7, No. 8, No. 9 and No. 10 shows a coefficient of friction of 10.

  These results show the following: The lubricant composition No. 1 according to the present invention. 9 contains an organomolybdenum compound according to the invention and a compound containing a dithiophosphate group according to the invention, but without an aliphatic triamine according to the invention (composition No. 8), and a fat according to the invention. Having improved frictional properties at steel/steel contact as compared to a lubricant composition containing a group triamine but not containing an organomolybdenum compound according to the present invention and a compound containing dithiophosphate (Composition No. 10). ing.

  The following points are worth noting. Lubricant composition No. 8 and No. The friction coefficient of No. 10 is the lubricant composition No. 10 according to the present invention. A coefficient of friction of more than 9 and therefore a combination of an organomolybdenum compound according to the invention, a compound containing a dithiophosphate group according to the invention, and an aliphatic triamine according to the invention for reducing friction during steel/steel contact. Demonstrate the synergistic effect of.

  In addition to the results regarding the coefficient of friction, the lubricant composition No. Compared to 8 and 10, lubricant composition No. 3 according to the invention. It was observed that the use of 9 did not worsen the wear on the surface of the balls.

(Test 6: Evaluation of friction characteristics of lubricant composition during steel/diamond contact)
Lubricant composition No. 7, No. 8 and No. The friction properties of the 9 steel/diamond contacts are evaluated by measuring the coefficient of friction.

Under the following conditions, the coefficient of friction is evaluated using a nanodiamond ball/steel plane linear friction meter under the following conditions:
・Steel grade: 100c6,
Properties of nanodiamond coat: Nanocrystalline diamond layer composed of sp ³ hybridized carbon atoms of about 75% (purity of about 75%), thickness of 1.5 μm, surface roughness of 14 nm, hardness of about 74 GPa, and Young's modulus of 620 GPa. ,
・Temperature: 80℃,
・10N normal load,
-Movement 5 mm.

  A difference of at least 0.01 between two friction coefficient values is taken into account as having an important meaning for indicating the effect on the friction coefficient.

  Table 9 shows the lubricant composition No. 7, No. 8 and No. 9 shows a friction coefficient of 9.

  These results show the following: The lubricant composition No. 1 according to the present invention. 9 contains steel/composition containing an organomolybdenum compound according to the invention and a compound containing a dithiophosphate group according to the invention, but without the aliphatic triamine according to the invention (composition No. 8). Improve the friction characteristics for diamond contact.

  In addition to the results regarding the coefficient of friction, the lubricant composition No. In comparison with No. 8, the lubricant composition No. 8 according to the present invention. It was observed that the use of 9 did not exacerbate the wear of the ball's nanodiamond coat.

(Test 7: Evaluation of friction characteristics of lubricant composition during DLC/steel contact)
Lubricant composition No. 7, No. 8 and No. Friction properties at 9 DLC/steel contacts are evaluated by measuring the coefficient of friction. The coefficient of friction is evaluated by the method described in Test 2.

  A difference of at least 0.01 between two friction coefficient values is taken into account as having an important meaning for indicating the effect on the friction coefficient.

  Table 10 shows the lubricant composition No. 7, No. 8 and No. 9 shows a friction coefficient of 9.

  These results show the following: The lubricant composition No. 1 according to the present invention. 9 comprises DLC/compared to a lubricant composition (composition No. 8) containing an organomolybdenum compound according to the invention and a compound containing a dithiophosphate group according to the invention, but without an aliphatic triamine according to the invention. It has improved frictional properties for steel contact.

  Therefore, the above examples and tests demonstrate all of the following: Due to the presence of the combination of the organomolybdenum compound according to the invention, the compound containing a dithiophosphate group according to the invention, and the aliphatic triamine according to the invention in a lubricant composition, in this composition on steel/steel contact, And on steel/carbon coated contacts (especially steel/nanodiamond contacts, more particularly steel/DLC contacts) making it possible to show equivalent or improved friction properties.

式中：
・Ｘ ¹ は酸素原子または窒素原子を表わし；
・Ｘ ² は酸素原子または窒素原子を表わし；
・Ｘ ¹ が酸素原子を表わす場合、ｎは１を表わし、また、Ｘ ² が酸素原子を表わす場合、ｍは１を表わし；
・Ｘ ¹ が窒素原子を表わす場合、ｎは２を表わし、また、Ｘ ² が窒素原子を表わす場合、ｍは２を表わし；
・Ｒ ₁ は、３〜３０個の炭素原子（好ましくは３〜２０個の炭素原子、有利には７〜１７個の炭素原子）を含み、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わす；
−式（ＩＩ）の化合物：

式中：
・Ｘ ¹ は酸素原子または窒素原子を表わし；
・Ｘ ² は酸素原子または窒素原子を表わし；
・Ｘ ¹ が酸素原子を表わす場合、ｎは１を表わし、また、Ｘ ² が酸素原子を表わす場合、ｍは１を表わし；
・Ｘ ¹ が窒素原子を表わす場合、ｎは２を表わし、また、Ｘ ² が窒素原子を表わす場合、ｍは２を表わし；
・Ｒ ₁ は、３〜３０個の炭素原子（好ましくは３〜２０個の炭素原子、有利には７〜１７個の炭素原子）を含み、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わし；
・Ｒ ₂ は、３〜３０個の炭素原子（好ましくは３〜２０個の炭素原子、有利には７〜１７個の炭素原子）を含み、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わす；
−式（Ｉ）の少なくとも１つの化合物および式（ＩＩ）の少なくとも１つの化合物の混合物。
〔態様４〕
態様３に記載の潤滑剤組成物であって、モリブデン錯体は、式（Ｉ−ａ）の少なくとも１つの化合物を含む潤滑剤組成物。

式中、Ｒ ₁ は、３〜３０個の炭素原子（好ましくは３〜２０個の炭素原子、有利には７〜１７個の炭素原子）を含み、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わす。
〔態様５〕
態様３に記載の潤滑剤組成物であって、モリブデン錯体は、式（ＩＩ−ａ）の少なくとも１つの化合物を含む潤滑剤組成物。

式中、Ｒ ₁ は、３〜３０個の炭素原子（好ましくは３〜２０個の炭素原子、有利には７〜１７個の炭素原子）を含み、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わす。
〔態様６〕
態様１から５のいずれか一態様に記載の潤滑剤組成物であって、有機モリブデン化合物の重量による量は、潤滑剤組成物の総重量に対して、０．０５〜３％（好ましくは０．１〜２％、有利には０．１〜１％）の範囲である潤滑剤組成物。
〔態様７〕
態様１〜６のいずれか一態様に記載の潤滑剤組成物であって、ジチオホスフェート基を含む化合物は、アンモニウム・ジチオホスフェート、アミン・ジチオホスフェート、エステル・ジチオホスフェート、および金属ジチオホスフェートの、単独でまたは混合物で構成された群から選択される潤滑剤組成物。
〔態様８〕
態様１〜７のいずれか一態様に記載の潤滑剤組成物であって、ジチオホスフェート基を含む化合物は式（ＶＩＩ）の化合物である潤滑剤組成物。

式中：
・Ｒ ₁₈ は、直鎖または分岐鎖の、飽和又は不飽和の、置換又は非置換の、１〜３０個の炭素原子を含むアルキル基を表わし；
・Ｒ ₁₉ は、直鎖または分岐鎖の、飽和又は不飽和の、置換又は非置換の、１〜３０個の炭素原子を含むアルキル基を表わし；
・Ｍは金属カチオン（好ましくはＺｎ ²⁺ カチオン）を表わし；
・ｎは、前記金属カチオンの価数を表わす。
〔態様９〕
態様１〜８のいずれか一態様に記載の潤滑剤組成物であって、ジチオホスフェート基を含む化合物が式（ＶＩＩ−ａ）または式（ＶＩＩ−ｂ）の化合物である潤滑剤組成物。

式中：
・Ｒ ₁₈ は、直鎖または分岐鎖の、飽和又は不飽和の、置換又は非置換の、１〜３０個の炭素原子を含むアルキル基を表わし；
・Ｒ ₁₉ は、直鎖または分岐鎖の、飽和又は不飽和の、置換又は非置換の、１〜３０個の炭素原子を含むアルキル基を表わす。
〔態様１０〕
態様１〜９のいずれか一態様に記載の潤滑剤組成物であって、ジチオホスフェート基を含む化合物の重量による量は、潤滑剤組成物の総重量に対して、０．１〜５％（好ましくは０．１〜３％、有利には０．５〜２％）の範囲である潤滑剤組成物。
〔態様１１〕
態様１〜１０のいずれか一態様に記載の潤滑剤組成物であって、脂肪族トリアミンは次のものから選択される潤滑剤組成物。
・式（ＶＩＩＩ）の化合物
Ｒ ₂₀ −Ｎ−［（ＣＨ ₂ ） ₃ −ＮＨ ₂ ］ ₂ （ＶＩＩＩ）
式中、Ｒ ₂₀ は少なくとも１０個の炭素原子を含む、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わす；
・式（ＩＸ）の化合物
Ｒ ₂₁ −ＮＨ−（ＣＨ ₂ −ＣＨ ₂ −ＣＨ ₂ −ＮＨ） ₂ −Ｈ （ＩＸ）
式中、Ｒ ₂₁ は少なくとも１０個の炭素原子を含む、直鎖または分岐鎖の、飽和又は不飽和のアルキル基を表わす。
〔態様１２〕
態様１〜１１のいずれか一態様に記載の潤滑剤組成物であって、脂肪族トリアミンの重量による量は、潤滑剤組成物の総重量に対して、０．１〜５％（好ましくは０．１〜３％、有利には０．５〜２％）の範囲である潤滑剤組成物。
〔態様１３〕
態様１〜１２のいずれか一態様に記載の潤滑剤組成物であって、質量比（有機モリブデン化合物／脂肪族トリアミン）１／１０〜１（好ましくは１／５〜４／５）を有する潤滑剤組成物。
〔態様１４〕
態様１〜１３のいずれか一態様に記載の潤滑剤組成物であって、質量比（有機モリブデン化合物／ジチオホスフェート基を含む化合物／脂肪族トリアミン）１／１０／１０〜１／１／１（好ましくは１／５／５〜４／５／５）を有する潤滑剤組成物。
〔態様１５〕
態様１〜１４のいずれか一態様に記載の潤滑剤組成物であって、清浄剤、アンモニウム・ジチオホスフェート、アミン・ジチオホスフェート、エステル・ジチオホスフェートおよび金属ジチオホスフェートと異なる耐摩耗添加剤、極圧添加剤、分散剤、流動点向上剤、消泡剤、増粘剤およびそれらの混合物から選択された少なくとも１つの添加剤をさらに含む潤滑剤組成物。
〔態様１６〕
乗り物エンジン（好ましくは自動車両エンジン）中の２つの鋼表面間の摩擦を減少させるための態様１〜１５のいずれか一態様に記載された潤滑剤組成物の使用。
〔態様１７〕
乗り物エンジン（好ましくは自動車両エンジン）中の鋼表面と炭素被覆表面の間の摩擦を減少させるための態様１〜１５のいずれか一態様に記載された潤滑剤組成物の使用。
〔態様１８〕
乗り物エンジン（好ましくは自動車両エンジン）中の２つの炭素被覆表面間の摩擦を減少させるための態様１〜１５のいずれか一態様に記載された潤滑剤組成物の使用。
〔態様１９〕
乗り物（好ましくは自動車両）の燃費を減少させるための態様１〜１５のいずれか一態様に記載された潤滑剤組成物の使用。
〔態様２０〕
以下を含む添加剤濃縮物型組成物：
・少なくとも１つの有機モリブデン化合物、
・ジチオホスフェート基を含む少なくとも１つの化合物、および
・少なくとも１つの脂肪族トリアミン。 The presence of such a combination in the lubricant composition further ensures that the lubricant composition retains suitable antiwear properties, such as steel/steel contact, and steel/carbon coated contact, especially steel/nanodiamond contact, More particularly with steel/DLC contacts, enabling.
The present invention includes the following contents as embodiments.
[Aspect 1]
Lubricant composition comprising:
At least one base oil,
· At least one organomolybdenum compound,
At least one compound containing a dithiophosphate group, and
-At least one aliphatic triamine.
[Aspect 2]
The lubricant composition according to aspect 1, wherein the organic molybdenum compound is a molybdenum dithiocarbamate compound.
[Aspect 3]
The lubricant composition according to aspect 1, wherein the organic molybdenum compound is a molybdenum complex containing at least one compound selected from the following.
-A compound of formula (I):

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ contains 3 to 30 carbon atoms (preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms), straight-chain or branched, saturated or unsaturated alkyl. Represents a group;
-A compound of formula (II):

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ contains 3 to 30 carbon atoms (preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms), straight-chain or branched, saturated or unsaturated alkyl. Represents a group;
R ₂ contains 3 to 30 carbon atoms (preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms), straight-chain or branched, saturated or unsaturated alkyl. Represents a group;
-A mixture of at least one compound of formula (I) and at least one compound of formula (II).
[Mode 4]
A lubricant composition according to aspect 3, wherein the molybdenum complex comprises at least one compound of formula (Ia).

Wherein R ₁ contains 3 to 30 carbon atoms (preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms), straight-chain or branched, saturated or unsaturated. Represents an alkyl group.
[Aspect 5]
A lubricant composition according to aspect 3, wherein the molybdenum complex comprises at least one compound of formula (II-a).

Wherein R ₁ contains 3 to 30 carbon atoms (preferably 3 to 20 carbon atoms, advantageously 7 to 17 carbon atoms), straight-chain or branched, saturated or unsaturated. Represents an alkyl group.
[Aspect 6]
A lubricant composition according to any one of aspects 1 to 5, wherein the amount by weight of organomolybdenum compound is from 0.05 to 3% (preferably 0) based on the total weight of the lubricant composition. 0.1 to 2%, preferably 0.1 to 1%).
[Aspect 7]
The lubricant composition according to any one of aspects 1 to 6, wherein the compound containing a dithiophosphate group is an ammonium dithiophosphate, an amine dithiophosphate, an ester dithiophosphate, and a metal dithiophosphate alone. And a lubricant composition selected from the group consisting of mixtures.
[Aspect 8]
A lubricant composition according to any one of aspects 1 to 7, wherein the compound containing a dithiophosphate group is a compound of formula (VII).

In the formula:
R ₁₈ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms;
R ₁₉ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms;
M represents a metal cation (preferably Zn ²⁺ cation);
-N represents the valence of the metal cation.
[Aspect 9]
A lubricant composition according to any one of aspects 1 to 8, wherein the compound containing a dithiophosphate group is a compound of formula (VII-a) or formula (VII-b).

In the formula:
R ₁₈ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms;
R ₁₉ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms.
[Aspect 10]
The lubricant composition according to any one of aspects 1 to 9, wherein the amount by weight of the compound containing a dithiophosphate group is 0.1 to 5% (based on the total weight of the lubricant composition). A lubricant composition preferably in the range of 0.1-3%, advantageously 0.5-2%.
[Aspect 11]
A lubricant composition according to any one of aspects 1 to 10, wherein the aliphatic triamine is selected from the following:
-Compound of formula (VIII)
_{R 20 -N - [(CH 2} ) 3 -NH 2] 2 (VIII)
Wherein R ₂₀ represents a linear or branched, saturated or unsaturated alkyl group containing at least 10 carbon atoms;
.Compound of formula (IX)
_{R 21 -NH- (CH 2 -CH 2} -CH 2 -NH) 2 -H (IX)
In the formula, R ₂₁ represents a linear or branched, saturated or unsaturated alkyl group containing at least 10 carbon atoms.
[Aspect 12]
A lubricant composition according to any one of aspects 1 to 11, wherein the amount by weight of the aliphatic triamine is 0.1 to 5% (preferably 0) based on the total weight of the lubricant composition. 0.1 to 3%, preferably 0.5 to 2%).
[Aspect 13]
A lubricant composition according to any one of aspects 1 to 12, which has a mass ratio (organo molybdenum compound/aliphatic triamine) of 1/10 to 1 (preferably 1/5 to 4/5). Agent composition.
[Aspect 14]
The lubricant composition according to any one of aspects 1 to 13, wherein the mass ratio (organo molybdenum compound/compound containing dithiophosphate group/aliphatic triamine) is 1/10/10 to 1/1/1( A lubricant composition having preferably 1/5/5 to 4/5/5).
[Aspect 15]
A lubricant composition according to any one of aspects 1-14, comprising: a detergent, an ammonium dithiophosphate, an amine dithiophosphate, an ester dithiophosphate and an antiwear additive different from the metal dithiophosphate, extreme pressure. A lubricant composition further comprising at least one additive selected from additives, dispersants, pour point improvers, defoamers, thickeners and mixtures thereof.
[Aspect 16]
Use of a lubricant composition according to any one of aspects 1 to 15 for reducing the friction between two steel surfaces in a vehicle engine, preferably a motor vehicle engine.
[Aspect 17]
Use of a lubricant composition according to any one of aspects 1 to 15 for reducing friction between a steel surface and a carbon coated surface in a vehicle engine (preferably a motor vehicle engine).
[Aspect 18]
Use of a lubricant composition according to any one of aspects 1 to 15 for reducing friction between two carbon coated surfaces in a vehicle engine (preferably a motor vehicle engine).
[Aspect 19]
Use of the lubricant composition according to any one of aspects 1 to 15 for reducing the fuel economy of a vehicle (preferably a motor vehicle).
[Aspect 20]
Additive concentrate type compositions including:
· At least one organomolybdenum compound,
At least one compound containing a dithiophosphate group, and
-At least one aliphatic triamine.

Claims (16)

At least one base oil,
· At least one organomolybdenum compound,
A lubricant composition comprising at least one compound containing a dithiophosphate group, and at least one aliphatic triamine ,
a) the organic molybdenum compound is a molybdenum dithiocarbamate compound, a molybdenum dithiophosphate compound, or a molybdenum complex containing at least one compound selected from the following:
-A compound of formula (I):

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ represents a linear or branched, saturated or unsaturated alkyl group containing 3 to 30 carbon atoms;
-A compound of formula (II):

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ represents a linear or branched, saturated or unsaturated alkyl group containing 3 to 30 carbon atoms;
· R ₂ comprises from 3 to 30 carbon atoms, straight or branched chain, represents a saturated or unsaturated alkyl group;
A mixture of at least one compound of formula (I) and at least one compound of formula (II),
b) the compound containing a dithiophosphate group is selected from the group consisting of ammonium dithiophosphates, amine dithiophosphates, ester dithiophosphates, and metal dithiophosphates, alone or in a mixture,
c) the aliphatic triamine is selected from:
-Compound of formula (VIII)
_{R 20 -N - [(CH 2} ) 3 -NH 2] 2 (VIII)
Wherein R ₂₀ represents a linear or branched, saturated or unsaturated alkyl group containing at least 10 carbon atoms;
.Compound of formula (IX)
_{R 21 -NH- (CH 2 -CH 2} -CH 2 -NH) 2 -H (IX)
Wherein R ₂₁ represents a linear or branched, saturated or unsaturated alkyl group containing at least 10 carbon atoms,
Lubricant composition . The lubricant composition according to claim 1, wherein the molybdenum complex comprises at least one compound of formula (Ia).

In the formula, R ₁ comprises 3 to 30 carbons atom, straight or branched chain, represents a saturated or unsaturated alkyl group. The lubricant composition according to claim 1, wherein the molybdenum complex comprises at least one compound of formula (II-a).

In the formula, R ₁ comprises 3 to 30 carbons atom, straight or branched chain, represents a saturated or unsaturated alkyl group. The lubricant composition according to any one of claims 1 to 3, wherein the amount by weight of the organic molybdenum compound is in the range of 0.05 to 3 % based on the total weight of the lubricant composition. A lubricant composition. A lubricant composition according to any one of claims 1-4, compounds containing dithiophosphate groups lubricant composition is a compound of formula (VII).

In the formula:
R ₁₈ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms;
R ₁₉ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms;
· M represents a metal Kachio down;
-N represents the valence of the metal cation. A lubricant composition according to any one of claims 1 to 5 compounds containing dithiophosphate group has the formula (VII-a) or a lubricant composition is a compound of formula (VII-b).

In the formula:
R ₁₈ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms;
R ₁₉ represents a straight-chain or branched, saturated or unsaturated, substituted or unsubstituted alkyl group containing 1 to 30 carbon atoms. A lubricant composition according to any one of claims 1 to 6 the amount by weight of the compound containing dithiophosphate group, based on the total weight of the lubricant composition, 0.1% to 5% A lubricant composition having the following range. A lubricant composition according to any one of claims 1 to 7 amount by weight of an aliphatic triamine, based on the total weight of the lubricant composition, in the range of 0.1% to 5% A lubricant composition. The lubricant composition according to any one of claims 1 to 9 , which has a mass ratio (organo molybdenum compound/aliphatic triamine) of 1/10 to 1: 1 . A lubricant composition according to any one of claim 1 to 9 (compound / fatty triamine containing an organic molybdenum compound / dithiophosphates group) weight ratio of 1/10 / 10-1 / 1/1 lubricant composition having. The lubricant composition according to any one of claims 1 to 10 , which is different from a detergent, an ammonium dithiophosphate, an amine dithiophosphate, an ester dithiophosphate and an antiwear additive different from metal dithiophosphate, and a pole. A lubricant composition further comprising at least one additive selected from pressure additives, dispersants, pour point improvers, defoamers, thickeners and mixtures thereof. Use according to claim 1 lubricant composition described in any one of 11 to reduce the friction between two steel surfaces in a vehicle engine. Use according to claim 1 lubricant composition described in any one of 11 to reduce the friction between the steel surface and the carbon coating the surface in a vehicle engine. Use of a lubricant composition as claimed in any one of claims 1 to 11 for reducing the friction between the two carbon-coated surface in a vehicle engine. Use of a lubricant composition as claimed in any one of claims 1 to 11 for reducing the fuel consumption of the ride thereof. · At least one organomolybdenum compound,
An additive concentrate composition comprising at least one compound containing a dithiophosphate group, and at least one aliphatic triamine ,
a) the organic molybdenum compound is a molybdenum dithiocarbamate compound, a molybdenum dithiophosphate compound, or a molybdenum complex containing at least one compound selected from the following:
-A compound of formula (I):

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ represents a linear or branched, saturated or unsaturated alkyl group containing 3 to 30 carbon atoms;
-A compound of formula (II):

In the formula:
X ¹ represents an oxygen atom or a nitrogen atom;
X ² represents an oxygen atom or a nitrogen atom;
N represents ¹ when X ¹ represents an oxygen atom, and m represents 1 when X ² represents an oxygen atom;
N represents 2 when X ¹ represents a nitrogen atom, and m represents ² when X ² represents a nitrogen atom;
R ₁ represents a linear or branched, saturated or unsaturated alkyl group containing 3 to 30 carbon atoms;
· R ₂ comprises from 3 to 30 carbon atoms, straight or branched chain, represents a saturated or unsaturated alkyl group;
A mixture of at least one compound of formula (I) and at least one compound of formula (II),
b) the compound containing a dithiophosphate group is selected from the group consisting of ammonium dithiophosphates, amine dithiophosphates, ester dithiophosphates, and metal dithiophosphates, alone or in a mixture,
c) the aliphatic triamine is selected from:
-Compound of formula (VIII)
_{R 20 -N - [(CH 2} ) 3 -NH 2] 2 (VIII)
Wherein R ₂₀ represents a linear or branched, saturated or unsaturated alkyl group containing at least 10 carbon atoms;
.Compound of formula (IX)
_{R 21 -NH- (CH 2 -CH 2} -CH 2 -NH) 2 -H (IX)
Wherein R ₂₁ represents a linear or branched, saturated or unsaturated alkyl group containing at least 10 carbon atoms,
Additive concentrate type composition .