JP2001294883A - Fluid for traction drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fluid for traction drive usable not only in a power transmission mechanism but also applicable to a hydraulic control mechanism and a frictional characteristic control mechanism of a wet type clutch. SOLUTION: This fluid for traction drive comprises (A) a naphthene ring- containing compound represented by the following general formula (1) and (B) a naphthene ring-containing compound represented by the following general formula (2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traction drive fluid.
More specifically, the present invention relates to a traction drive fluid that can be used not only for a power transmission mechanism but also for a hydraulic control mechanism and a friction characteristic control mechanism of a wet clutch. The present invention relates to a traction drive fluid that is preferably used.

[0002]

2. Description of the Related Art Conventionally, in the field of industrial machinery, a traction drive fluid is used in a traction drive type power transmission device that transmits power via an oil film. This traction drive fluid is required to have a high traction coefficient indicating power transmission capacity. In recent years, traction drive fluids have been researched and developed to be used in continuously variable transmissions for automobiles. When used in automobiles, not only power transmission mechanisms but also hydraulic control mechanisms and wet clutches are used. Will also be used for the friction characteristic control mechanism. As a transmission for an automobile, there is an automatic transmission oil (hereinafter referred to as ATF) as a lubricating oil used for a hydraulic control mechanism and for a friction characteristic control mechanism of a wet clutch. ATF is
It is a well-known fact that in order to fulfill the role as a hydraulic control mechanism, it is necessary that the kinematic viscosity at high temperatures be higher than a certain level and that the low-temperature fluidity be excellent. Also, a friction characteristic control mechanism of a wet clutch,
In particular, in order to fulfill the role of a control mechanism with the addition of a slip control mechanism, the ATF is required to be blended with an additive having excellent friction properties, particularly excellent anti-shudder properties. This is a well-known fact.
Therefore, when the traction drive fluid is used for a traction drive type continuously variable transmission for an automobile, the traction drive fluid is required not only for the power transmission ability which originally has excellent performance but also for the ATF. A capacity as a fluid for hydraulic control and a capacity as a fluid for controlling friction characteristics of a wet clutch are required.

[0003]

As a traction drive fluid, "Santo Truck" (manufactured by Nisseki Mitsubishi Co., Ltd.) is commercially available, and it is widely known that it has excellent power transmission capability. . However, when used in a continuously variable transmission for automobiles, it is necessary to satisfy fluidity at low temperatures and other performances. Therefore, traction drive fluids for automobiles have not yet been commercialized. Is the current situation. Therefore, the present invention has been made in view of such circumstances, and its purpose is not only excellent power transmission capability, but also excellent fluidity at low temperatures, that is, excellent capability as a hydraulic control fluid, It is still another object of the present invention to provide a traction drive fluid having excellent performance as a wet clutch control fluid.

[0004]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, a traction drive fluid preferably used particularly for a traction drive type continuously variable transmission for automobiles, More specifically, a traction drive fluid has been developed that is applicable not only to a traction drive fluid for a power transmission mechanism but also to a hydraulic control mechanism and a friction characteristic control mechanism of a wet clutch.

That is, the traction drive fluid of the present invention comprises (A) a naphthene ring-containing compound represented by the following general formula (1):

Embedded image (Wherein, R ^{1 to} R ⁶ are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring)
Is shown. ) And (B) a naphthene ring-containing ester represented by the following general formula (2)

Embedded image (In the formula, R ^{7 to} R ¹² each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring).)

The traction drive fluid of the present invention comprising the above (A) and (B) preferably contains (C) a viscosity index improver. The (C) viscosity index improver has a number average molecular weight of 800 or more and 150,000.
The following ethylene-α-olefin copolymers or hydrides thereof are preferred. Further, the traction drive fluid of the present invention preferably contains (D) an ashless dispersant and (E) a phosphorus-based additive. Further, the traction drive fluid of the present invention includes (F) a carbon number of 6 to 3 carbon atoms.
It is preferable to include a friction modifier which has at least one alkyl or alkenyl group in the molecule and has no hydrocarbon group having 31 or more carbon atoms in the molecule.
Further, the traction drive fluid of the present invention includes:
(G) It is preferable to contain a metal-based detergent having a total base number of 20 to 450 mgKOH / g. By blending one or more of the above (C) to (G) in combination with the traction drive fluid of the present invention, low-temperature fluidity, viscosity-temperature characteristics, abrasion resistance, oxidation stability , Cleanliness, friction characteristics and the like can be improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the contents of the present invention will be described in more detail. The traction drive fluid of the present invention is:
(A) a naphthene ring-containing compound represented by the following general formula (1)

Embedded image (Wherein, R ^{1 to} R ⁶ are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring)
Is shown. ) And (B) a naphthene ring-containing ester represented by the following general formula (2)

Embedded image (Wherein, R ^{7 to} R ¹² are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring), preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, It preferably represents a hydrogen atom or a methyl group.)
A traction drive fluid characterized by the following.

The alkyl group having 1 to 8 carbon atoms which may contain a naphthene ring in the above formulas (1) and (2) is specifically exemplified by a methyl group, an ethyl group, a propyl group and a butyl group. , An alkyl group such as a pentyl group, a hexyl group, a heptyl group, and an octyl group (the alkyl group may be linear or branched), a cyclopentylmethyl group, a cyclopentylethyl group, a cyclopentylpropyl group, a methylcyclopentylmethyl group, and ethyl. (Alkyl) cyclohexylalkyl groups such as a cyclopentylmethyl group, a dimethylcyclopentylmethyl group, a methylcyclopentylethyl group, a cyclohexylmethyl group, a cyclohexylethyl group, a methylcyclohexylmethyl group, a cycloheptylmethyl group, etc. Can be in the form of The substitution position of the group is optional)
Etc. can be exemplified. In the traction drive fluid of the present invention, the mixing ratio of the component (A) and the component (B) is not particularly limited, and is arbitrary, but the weight ratio of the component (A) :( B)
The components are from 1:99 to 99: 1, preferably 5:95
95: 5.

The traction drive fluid of the present invention preferably contains (C) a viscosity index improver.
In the present invention, examples of the viscosity index improver (component (C)) include a non-dispersion type viscosity index improver and / or a dispersion type viscosity index improver. As the non-dispersion type viscosity index improver, specifically, one or two or more monomers (C-C) selected from the compounds represented by the following formulas (3), (4) and (5) The polymer or copolymer of 1) or a hydride thereof can be exemplified. On the other hand, as the dispersion type viscosity index improver, specifically, a copolymer of two or more monomers selected from the compounds represented by the general formulas (6) and (7) or a hydrogenated product thereof is used. Those that contain a containing group,
One or more monomers (C-1) selected from the compounds represented by the general formulas (3) to (5) and the compounds represented by the general formulas (6) and (7) 1 to be chosen
Examples thereof include a copolymer with a kind or two or more kinds of monomers (C-2), a hydride thereof, and the like.

[0010]

Embedded image In the formula (3), R ¹⁰⁰ represents hydrogen or a methyl group;
¹⁰¹ represents an alkyl group having 1 to 18 carbon atoms. R ¹⁰¹
Examples of the alkyl group having 1 to 18 carbon atoms include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, and a decyl group. , Undecyl group, dodecyl group,
Examples thereof include a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group and the like (the alkyl groups may be linear or branched).

[0011]

Embedded image In the above formula (4), R ¹⁰² represents hydrogen or a methyl group;
¹⁰³ represents hydrogen or a hydrocarbon group having 1 to 12 carbon atoms.

[0012] Examples of the hydrocarbon group having 1 to 12 carbon atoms which indicates the R ^103, specifically, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group,
Alkyl groups such as octyl group, nonyl group, decyl group, undecyl group, dodecyl group (the alkyl groups may be linear or branched); butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl Alkenyl groups such as a benzyl group, a decenyl group, an undecenyl group and a dodecenyl group (these alkenyl groups may be linear or branched, and the position of the double bond is arbitrary); cyclopentyl group, cyclohexyl group, cycloheptyl group, etc. Carbon number 5
To 7 cycloalkyl groups; methylcyclopentyl group, dimethylcyclopentyl group, methylethylcyclopentyl group, diethylcyclopentyl group, methylcyclohexyl group, dimethylcyclohexyl group, methylethylcyclohexyl group, diethylcyclohexyl group, methylcycloheptyl group, dimethylcycloheptyl group Alkylcycloalkyl groups having 6 to 11 carbon atoms such as methylethylcycloheptyl group and diethylcycloheptyl group (the substitution positions of these alkyl groups with cycloalkyl groups are arbitrary); aryl groups such as phenyl group and naphthyl group : Alkylaryl groups having 7 to 12 carbon atoms such as tolyl group, xylyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group and hexylphenyl group (the alkyl groups are linear But may be branched, and substitution position of the aryl group is optional); benzyl, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl group, 7 carbon atoms such as a phenyl hexyl group
And 12 phenylalkyl groups (these alkyl groups may be linear or branched); and the like.

[0013]

Embedded image In the above formula (5), D ¹ and D ² are each independently a hydrogen atom or a residue of an alkyl alcohol having 1 to 18 carbon atoms (−
OR ¹⁰⁴ : R ¹⁰⁴ is an alkyl group having 1 to 18 carbon atoms or a residue of a monoalkylamine having 1 to 18 carbon atoms (—NHR
¹⁰⁵ : R ¹⁰⁵ represents an alkyl group having 1 to 18 carbon atoms).

[0014]

Embedded image (6) In the formula, R ¹⁰⁶ represents a hydrogen atom or a methyl group;
¹⁰⁷ represents an alkylene group having 1 to 18 carbon atoms, and E ¹ represents an amine residue or a heterocyclic residue containing 1 to 2 nitrogen atoms and 0 to 2 oxygen atoms. A is 0 or 1
Is an integer.

Examples of the alkylene group having 1 to 18 carbon atoms for R ¹⁰⁷ include an ethylene group, a propylene group,
Butylene group, pentylene group, hexylene group, heptylene group, octylene group, nonylene group, decylene group, undecylene group, dodecylene group, tridecylene group, tetradecylene group, pentadecylene group, hexadecylene group, heptadecylene group, octadecylene group, etc. May be linear or branched). Also, E
^{As the} group representing ¹ , specifically, a dimethylamino group,
Diethylamino group, dipropylamino group, dibutylamino group, anilino group, toluidino group, xylidino group, acetylamino group, benzoylamino group, morpholino group, pyrrolyl group, pyrrolino group, pyridyl group, methylpyridyl group, pyrrolidinyl group, piperidinyl group Quinonyl group, pyrrolidonyl group, pyrrolidono group, imidazolino group, pyrazino group and the like.

[0016]

Embedded image In the formula (7), R ¹⁰⁸ represents a hydrogen atom or a methyl group, and E ² represents an amine residue or a heterocyclic residue containing 1 to 2 nitrogen atoms and 0 to 2 oxygen atoms. .

Examples of the group representing E ² include a dimethylamino group, a diethylamino group, a dipropylamino group, a dibutylamino group, an anilino group, a toluidino group, a xylidino group, an acetylamino group, a benzoylamino group,
Morpholino group, pyrrolyl group, pyrrolino group, pyridyl group,
Methylpyridyl group, pyrrolidinyl group, piperidinyl group,
Examples thereof include a quinonyl group, a pyrrolidonyl group, a pyrrolidono group, an imidazolino group, and a pyrazino group. Specific examples of preferred monomers as the component (C-1) include alkyl acrylates having 1 to 18 carbon atoms, alkyl methacrylates having 1 to 18 carbon atoms, olefins having 2 to 20 carbon atoms, styrene, methyl styrene, Examples thereof include maleic anhydride esters, maleic anhydride amides, and mixtures thereof. Specific examples of preferred monomers as the component (C-2) include dimethylaminomethyl methacrylate, diethylaminomethyl methacrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, 2-methyl-5-vinylpyridine, morpholinomethyl methacrylate, Examples include morpholinoethyl methacrylate, N-vinylpyrrolidone, and mixtures thereof. When one or more monomers selected from the above (C-1) compounds and one or two or more monomers selected from the (C-2) compounds are copolymerized. The molar ratio of the component (C-1) to the component (C-2) is arbitrary, but is generally about 80:20 to 95: 5. The reaction method of the copolymerization is also arbitrary, but usually, (C-C) is added in the presence of a polymerization initiator such as benzoyl peroxide.
A copolymer can be easily obtained by radical solution polymerization of the component (1) and the component (C-2).

Specific examples of the viscosity index improver include non-dispersible and dispersed polymethacrylates, non-dispersed and dispersed ethylene-α-olefin copolymers and hydrides thereof, polyisobutylene and hydrides thereof, and styrene. -Hydrogenated diene copolymers, styrene-maleic anhydride copolymers, polyalkylstyrenes and the like. By containing one or two or more arbitrarily selected from the viscosity index improvers of the component (C), the high-temperature viscosity particularly required for a traction drive fluid for automobiles is increased, and It is possible to improve the balance with low-temperature fluidity. Usually, the viscosity index improver is used together with a solvent in the synthesis thereof. In the present invention, the naphthene ring-containing compound represented by the above general formulas (1) and (2), the isobutene oligomer or its hydride, etc. Is desirably used as a solvent in the synthesis. The molecular weight of the component (C) is preferably selected in consideration of shear stability. Specifically, the number average molecular weight of the component (C) is, for example, 5,000 to 150,000, preferably 5,000 to 35,000 in the case of dispersible and non-dispersible polymethacrylates. In the case of polyisobutylene and its hydride, 800
5,000 to 5,000, preferably 2,000 to 4,000. If the number average molecular weight of polyisobutylene and its hydride is less than 800, the viscosity increase is low and the traction coefficient is reduced, and if it exceeds 5,000, the shear stability deteriorates or the low-temperature fluidity deteriorates. .

Among these components (C), ethylene-α-olefin copolymers having a number average molecular weight of 800 or more and 150,000 or less, preferably 3,000 to 20,000, or hydrides thereof are particularly useful in traction. By blending with the drive fluid, a traction drive fluid having a high traction coefficient, excellent low-temperature fluidity, and high high-temperature viscosity is obtained, which has overall excellent performance. Particularly preferred are viscosity index improvers. When the number average molecular weight of the ethylene-α-olefin copolymer or its hydride is less than 800, the viscosity is low, the traction coefficient is low, and the
If it exceeds 0, the shear stability deteriorates. Ethylene-α
-The ethylene component content in the olefin copolymer or its hydride is not particularly limited, but is preferably 30 to 80 mol%, more preferably 50 to 80 mol%. Examples of the α-olefin include propylene and 1-butene, and propylene is more preferable. When the component (C) is contained in the traction drive fluid of the present invention, its content is not particularly limited, but it is usually preferably 0.1 to 20% by mass based on the total amount of the traction drive fluid. More preferably, it is 1 to 10% by mass. If the content exceeds 20% by mass, the traction coefficient of the fluid decreases, while if it is less than 0.1% by mass, the effect of addition is poor.

The traction drive fluid of the present invention preferably contains (D) an ashless dispersant and (E) a phosphorus-based additive. The combination of (D) the ashless dispersant and (E) the phosphorus-based additive can provide the traction drive fluid with the abrasion resistance, oxidation stability and cleanliness required for the hydraulic control mechanism. In the present invention, examples of the ashless dispersant (component (D)) include a nitrogen-containing compound having at least one alkyl group or alkenyl group having 40 to 400 carbon atoms in a molecule or a derivative thereof;
Alternatively, a modified product of alkenyl succinimide and the like may be mentioned, and one or more kinds arbitrarily selected from these may be blended. The alkyl group or the alkenyl group may be linear or branched, but is preferably, for example, propylene, 1-butene, oligomers of olefins such as isobutylene or copolymers of ethylene and propylene. Derived branched alkyl groups and branched alkenyl groups are exemplified. This alkyl group or alkenyl group has 40 to 400 carbon atoms,
Preferably it is 60-350. When the number of carbon atoms of the alkyl group or alkenyl group is less than 40, the solubility of the compound in the lubricating base oil is reduced. On the other hand, when the number of carbon atoms of the alkyl group or alkenyl group exceeds 400, the low temperature of the traction drive fluid is low. Since the fluidity deteriorates, each is not preferable.

The nitrogen content of the nitrogen-containing compound mentioned as an example of the component (D) is arbitrary. However, from the viewpoints of abrasion resistance, oxidation stability, friction characteristics, and the like, the nitrogen content is usually 0.1.
An amount of from 0.1 to 10% by mass, preferably from 0.1 to 10% by mass is desirably used. Specific examples of the component (D) include: (D-1) succinimide having at least one alkyl group or alkenyl group having 40 to 400 carbon atoms in a molecule, or a derivative thereof. Benzylamine having at least one alkyl group or alkenyl group of 40 to 400 in the molecule, or a derivative thereof (D-3) polyamine having at least one alkyl group or alkenyl group of 40 to 400 carbon atoms in the molecule, or One or more compounds selected from the derivatives are listed. More specifically, examples of the succinimide (D-1) include compounds represented by the following formula (8) or (9).

[0022]

Embedded image In the formula (8), R ¹⁰⁹ represents an alkyl group or an alkenyl group having 40 to 400, preferably 60 to 350, carbon atoms, and b represents an integer of 1 to 5, preferably 2 to 4.

[0023]

Embedded image In the above formula (9), R ¹¹⁰ and R ¹¹¹ are individually
It represents an alkyl or alkenyl group having 40 to 400, preferably 60 to 350 carbon atoms, and c represents an integer of 0 to 4, preferably 1 to 3.

Incidentally, succinimide is a compound obtained by adding succinic anhydride to one end of a polyamine during imidization.
There are so-called mono-type succinimides of the formula (8) and so-called bis-type succinimides of the formula (9) in which succinic anhydride is added to both ends of a polyamine, but (D-1) As the components, any of them and mixtures thereof can be used. The above (D-
2) More specifically, examples of the benzylamine include a compound represented by the following formula (10).

[0025]

Embedded image In the above formula (10), R ¹¹² represents an alkyl group or alkenyl group having 40 to 400, preferably 60 to 350 carbon atoms, and d represents an integer of 1 to 5, preferably 2 to 4. The method for producing this benzylamine is not particularly limited. And a polyamine such as triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, etc., by a Mannich reaction. More specifically, examples of the above-mentioned (D-3) polyamine include compounds represented by the following formula (11).

[0026]

Embedded image In the formula (11), R ¹¹³ represents an alkyl group or an alkenyl group having 40 to 400 carbon atoms, preferably 60 to 350 carbon atoms, and e represents an integer of 1 to 5, preferably 2 to 4.

The method for producing the polyamine is not limited at all. For example, after chlorinating a polyolefin such as a propylene oligomer, polybutene, or ethylene-α-olefin copolymer, ammonia, ethylenediamine, diethylenetriamine, It can be obtained by reacting a polyamine such as triethylenetetramine, tetraethylenepentamine and pentaethylenehexamine. As the derivative of the nitrogen-containing compound mentioned as an example of the component (D), specifically, for example, a monocarboxylic acid (fatty acid or the like) having 2 to 30 carbon atoms or oxalic acid may be added to the nitrogen-containing compound described above. , Phthalic acid, trimellitic acid,
A so-called acid-modified compound obtained by reacting a polycarboxylic acid having 2 to 30 carbon atoms such as pyromellitic acid to neutralize or amidate part or all of the remaining amino group and / or imino group; A so-called boron-modified compound in which boric acid acts on such a nitrogen-containing compound to neutralize or amidate a part or all of the remaining amino group and / or imino group; A sulfur-modified compound treated with a sulfur compound; and 2 selected from acid-, boron-, and sulfur-modified nitrogen-containing compounds as described above.
Modified compounds obtained by combining at least two kinds of modifications. When the component (D) is contained in the traction drive fluid of the present invention, its content is not particularly limited, but it is usually preferably 0.01 to 10.0% by mass based on the total amount of the traction drive fluid. ,
More preferably, it is 0.1 to 7.0% by mass. (D)
When the content of the component is less than 0.01% by mass, there is no effect on cleanliness. On the other hand, if it exceeds 10.0% by mass, the low-temperature fluidity of the traction drive fluid is significantly deteriorated, which is not preferable.

In the present invention, the phosphorus-based additive (component (E)) includes zinc alkyldithiophosphate, phosphoric acid, phosphorous acid, phosphoric acid monoesters, phosphoric acid diesters, and the like.
Examples include phosphoric acid triesters, phosphite monoesters, phosphite diesters, phosphite triesters, salts of (phosphorous) phosphites, and mixtures thereof. Of the components (E) listed above, those excluding phosphoric acid and phosphorous acid usually have 2 to 30 carbon atoms, preferably 3 to 3 carbon atoms.
It is a compound containing up to 20 hydrocarbon groups. As the hydrocarbon group having 2 to 30 carbon atoms, specifically, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group,
Heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group,
Alkyl groups such as a pentadecyl group, a hexadecyl group, a heptadecyl group, and an octadecyl group (the alkyl groups may be linear or branched); a butenyl group, a pentenyl group,
Alkenyl groups such as hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group (these alkenyl groups are linear Or the position of the double bond is arbitrary); cycloalkyl group having 5 to 7 carbon atoms such as cyclopentyl group, cyclohexyl group, cycloheptyl group; methylcyclopentyl group, dimethylcyclopentyl group, methylethyl Cyclopentyl, diethylcyclopentyl, methylcyclohexyl, dimethylcyclohexyl, methylethylcyclohexyl, diethylcyclohexyl, methylcycloheptyl, dimethylcycloheptyl, methylethylcyclo An alkylcycloalkyl group having 6 to 11 carbon atoms such as a butyl group and a diethylcycloheptyl group (the substitution position of an alkyl group with a cycloalkyl group is also arbitrary); aryl groups such as a phenyl group and a naphthyl group: tolyl group, xylyl Groups, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonylphenyl, decylphenyl, undecylphenyl, dodecylphenyl, etc. 7 to 18 alkylaryl groups (the alkyl group may be linear or branched, and the position of substitution on the aryl group is arbitrary); benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, Each aryl having 7 to 12 carbon atoms such as a phenylpentyl group and a phenylhexyl group Alkyl group (the alkyl groups may be and straight-chain or branched);
Etc. can be exemplified.

Specific examples of preferred compounds as component (E) include phosphoric acid; phosphorous acid; zinc dipropyldithiophosphate, zinc dibutyldithiophosphate, zinc dipentyldithiophosphate, zinc dihexyldithiophosphate, and diheptyldithiophosphate. Zinc, zinc alkyldithiophosphate such as zinc dioctyldithiophosphate (the alkyl group may be linear or branched); monopropyl phosphate, monobutyl phosphate, monopentyl phosphate, monohexyl phosphate, monoheptyl phosphate, monooctyl Monoalkyl phosphates such as phosphate (the alkyl group may be linear or branched); Mono (alkyl) aryl phosphates such as monophenyl phosphate and monocresyl phosphate; dipropyl phosphate, dibutyl Phosphate dialkyl esters such as phosphate, dipentyl phosphate, dihexyl phosphate, diheptyl phosphate and dioctyl phosphate (the alkyl group may be linear or branched); di (alkyl) phosphate such as diphenyl phosphate and dicresyl phosphate Aryl esters; trialkyl phosphates such as tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, tripeptyl phosphate and trioctyl phosphate (the alkyl group may be linear or branched); triphenyl Tri (alkyl) aryl phosphates such as phosphate and tricresyl phosphate; monopropyl phosphite, monobutyl phosphite, monopentyl phosphite, Monoalkyl phosphites such as silphosphite, monopeptyl phosphite and monooctyl phosphite (the alkyl group may be linear or branched); Mono (alkyl) aryl phosphates; dipropyl phosphite;
Dialkyl phosphites such as dibutyl phosphite, dipentyl phosphite, dihexyl phosphite, dipeptyl phosphite, dioctyl phosphite (the alkyl group may be linear or branched); diphenyl phosphite, dicresyl phosphite Di (alkyl) aryl phosphites such as phytite; trialkyl phosphites such as tripropyl phosphite, tributyl phosphite, tripentyl phosphite, trihexyl phosphite, tripeptyl phosphite and trioctyl phosphite (Alkyl groups may be linear or branched); tri (alkyl) aryl phosphites such as triphenyl phosphite and tricresyl phosphite; and mixtures thereof.

Examples of the above-mentioned (phosphite) salts of phosphoric acid esters include, for example, phosphoric acid monoester, phosphoric acid diester, phosphorous acid monoester, phosphorous acid diester, etc. Salts obtained by reacting a nitrogen-containing compound such as an amine compound containing only 1 to 8 hydrocarbon groups or hydroxyl group-containing hydrocarbon groups in the molecule to neutralize a part or all of the remaining acidic hydrogen can be exemplified. . Specific examples of the nitrogen-containing compound include ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, and diethylamine. And alkylamines such as methylpropylamine, ethylpropylamine, dipropylamine, methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, and dioctylamine. May be branched); monomethanolamine, monoethanolamine, monopropanolamine, monobutanolamine, monopentanolamine, monohexanolamine, Heptanolamine, monooctanolamine, monononanolamine, dimethanolamine, methanolethanolamine, diethanolamine, methanolpropanolamine, ethanolpropanolamine, dipropanolamine, methanolbutanolamine, ethanolbutanolamine, propanolbutanolamine, dibutanolamine, Alkanolamines such as dipentanolamine, dihexanolamine, diheptanolamine, and dioctanolamine (alkanol groups may be linear or branched); and mixtures thereof.

One or more of these components (E) can be arbitrarily compounded. In addition, as a component (E), the compound has at least one (F-2) alkyl group or alkenyl group having 6 to 30 carbon atoms described below in the molecule, and does not contain a hydrocarbon group having 31 or more carbon atoms in the molecule. When a compound contained in a phosphorus compound or a derivative thereof is used, the traction drive fluid of the present invention not only has the above-described wear resistance but also has optimized friction characteristics in a wet clutch at the same time. Can be granted. When the component (E) is contained in the traction drive fluid of the present invention, its content is not particularly limited, but is usually 0.005 to 0.2% by mass as a phosphorus element based on the total amount of the traction drive fluid. Is preferred. When the content of phosphorus is less than 0.005% by mass, there is no effect on the wear resistance,
If the amount is more than 10% by mass, the oxidation stability is deteriorated, which is not preferable.

The traction drive fluid of the present invention preferably contains (F) a friction modifier. This friction modifier (component (F)) has at least one alkyl group or alkenyl group having 6 to 30 carbon atoms in the molecule,
In addition, the compound does not contain a hydrocarbon group having 31 or more carbon atoms in the molecule. By blending the (F) friction modifier, a traction drive fluid having optimized friction characteristics can be obtained. The alkyl group or alkenyl group of the friction modifier may be linear or branched, but has 6 to 3 carbon atoms.
0, preferably 9 to 24 compounds are desirable. When the number of carbon atoms of the alkyl group or the alkenyl group is less than 6 or more than 30, the friction characteristics of the wet clutch deteriorate, which is not preferable.

As the alkyl group or alkenyl group, specifically, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group,
Tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl, henycosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octakosyl, nonacosyl , An alkyl group such as a triacontyl group (the alkyl group may be linear or branched); a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group,
Undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group,
Heptadecenyl group, octadecenyl group, nonadecenyl group, icosenyl group, henicocenyl group, docosenyl group,
Alkenyl groups such as tricosenyl group, tetracosenyl group, pentacosenyl group, hexacosenyl group, heptacosenyl group, octacosenyl group, nonacosenyl group and triacontenyl group (these alkenyl groups may be linear or branched; Is also optional); and the like. Further, it is not preferable to contain a hydrocarbon group having 31 or more carbon atoms as a friction modifier because the friction characteristics of the wet clutch deteriorate.

Specific examples of the component (F) include: (F-1) a hydrocarbon having at least one alkyl or alkenyl group having 6 to 30 carbon atoms in the molecule and having 31 or more carbon atoms. Amine compound having no group in the molecule or derivative thereof (F-2) A molecule having at least one alkyl group or alkenyl group having 6 to 30 carbon atoms in the molecule and having 31 or more carbon atoms in the molecule. Phosphorus compound not contained therein or derivative thereof (F-3) having at least one alkyl group or alkenyl group having 6 to 30 carbon atoms in the molecule and having a hydrocarbon group having 31 or more carbon atoms in the molecule Preferred compounds include one or more compounds selected from amides or metal salts of unsubstituted fatty acids. More specifically, the amine compound of (F-1) is represented by the following formula (1)
Examples thereof include an aliphatic monoamine represented by 2) or an alkylene oxide adduct thereof, an aliphatic polyamine represented by the following formula (13), and an imidazoline compound represented by the general formula (14).

[0035]

Embedded image In the formula (12), R ¹¹⁴ represents an alkyl group or an alkenyl group having 6 to 30 carbon atoms, preferably 9 to 24 carbon atoms;
¹¹⁵ and R ¹¹⁶ each independently represent an ethylene group or a propylene group; R ¹¹⁷ and R ¹¹⁸ each independently represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms; 0 to 10 and f + g = 0 to 1
0, preferably each independently 0-6, and f
+ G = 0 to 10 represents an integer.

[0036]

Embedded image In the above formula (13), R ¹¹⁹ represents an alkyl group or an alkenyl group having 6 to 30 carbon atoms, preferably 9 to 24 carbon atoms;
¹²⁰ represents an ethylene group or a propylene group, and R ¹²¹ and R
¹²² is independently a hydrogen atom or a carbon number of 1 to 30
And h represents 1 to 5, preferably 1 to 4
Are shown as integers.

[0037]

Embedded image In the formula (14), R ¹²³ represents an alkyl group or an alkenyl group having 6 to 30 carbon atoms, preferably 9 to 24 carbon atoms;
¹²⁴ represents an ethylene group or a propylene group, and R ¹²⁵ represents
A hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, i.
Represents an integer of 0 to 10, preferably 0 to 6.

The alkyl group or alkenyl group for R ¹¹⁴ , R ¹¹⁹ and R ¹²³ may be linear or branched, but has 6 to 30, preferably 9 to 24 carbon atoms.
Is desirable. An alkyl or alkenyl group having 6 carbon atoms;
If the value is less than 30 or exceeds 30, the friction characteristics of the wet clutch are deteriorated, which is not preferable. R ¹¹⁴ , R
Specific examples of the alkyl group or alkenyl group representing ¹¹⁹ and R ¹²³ include, for example, the above-described various alkyl groups and alkenyl groups. Myristyl group, palmityl group, stearyl group, isostearyl group,
An alkyl or alkenyl group having 12 to 18 carbon atoms such as an oleyl group is particularly preferred.

R ¹¹⁷ , R ¹¹⁸ , R ¹²¹ , R ¹²² and R
Specific examples of the group represented by ¹²⁵ include a hydrogen atom; methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl , Tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl,
Alkyl groups such as henicosyl group, docosyl group, tricosyl group, tetracosyl group, pentacosyl group, hexacosyl group, heptacosyl group, octacosyl group, nonacosyl group, triacontyl group and the like (these alkyl groups may be linear or branched); butenyl Group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, icodecenyl group Alkenyl groups such as henicocenyl group, docosenyl group, tricosenyl group, tetracosenyl group, pentacosenyl group, hexacosenyl group, heptacosenyl group, octacosenyl group, nonacosenyl group, triacontenyl group, etc. The alkenyl group may be linear or branched, and the position of the double bond is also arbitrary.); A cycloalkyl group having 5 to 7 carbon atoms such as a cyclopentyl group, a cyclohexyl group and a cycloheptyl group; a methylcyclopentyl group; Dimethylcyclopentyl, methylethylcyclopentyl, diethylcyclopentyl, methylcyclohexyl, dimethylcyclohexyl, methylethylcyclohexyl, diethylcyclohexyl, methylcycloheptyl, dimethylcycloheptyl, methylethylcycloheptyl, diethylcycloheptyl An alkylcycloalkyl group having 6 to 11 carbon atoms (the substitution position of the alkyl group with the cycloalkyl group is also arbitrary);
Aryl groups such as phenyl group and naphthyl group: tolyl group, xylyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptylphenyl group, octylphenyl group, nonylphenyl group, decylphenyl An alkylaryl group having 7 to 18 carbon atoms such as a group, an undecylphenyl group or a dodecylphenyl group (the alkyl group may be linear or branched, and the position of substitution on the aryl group is arbitrary);
Benzyl group, phenylethyl group, phenylpropyl group,
Each arylalkyl group having 7 to 12 carbon atoms such as a phenylbutyl group, a phenylpentyl group, and a phenylhexyl group (the alkyl groups may be linear or branched); and the like.

In the aliphatic monoamine represented by the formula (12) or the alkylene oxide adduct thereof, R ¹¹⁷ and R ¹¹⁸ in the formula (12) are individually A hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and an aliphatic monoamine wherein f = g = 0, or R ¹¹⁷ and R ¹¹⁸ are hydrogen atoms, and f and g are each independently 0 In addition, an alkylene oxide adduct of an aliphatic monoamine, which is an integer satisfying f + g = 1 to 6 and an integer of f + g = 1 to 6, is more preferably used. Further, as the aliphatic polyamine represented by the above formula (13), in the formula (13), R ¹²¹ and R ¹²² each independently represent a hydrogen atom or a carbon atom having 1 carbon atom because of its superior frictional characteristics of a wet clutch. Aliphatic polyamines, which are alkyl groups 6 to 6, are more preferably used. Also,
As the imidazoline compound represented by the above formula (14), R ¹²⁵ in the formula (14) is a hydrogen atom or a C1-6
The imidazoline compound, which is an alkyl group, is more preferably used.

On the other hand, specific examples of the derivative of the amine compound represented by (E-1) include, for example, the compounds represented by the above formulas (12) to (12).
A monocarboxylic acid having 2 to 30 carbon atoms (fatty acid or the like) or a polycarboxylic acid having 2 to 30 carbon atoms such as oxalic acid, phthalic acid, trimellitic acid or pyromellitic acid acts on an amine compound such as (14). Then, a part or all of the remaining amino group and / or imino group was neutralized or amidated,
A so-called acid-modified compound; a so-called boric acid-modified compound in which boric acid acts on an amine compound represented by formulas (12) to (14) to neutralize a part or all of the remaining amino group and / or imino group. An amine compound represented by any of formulas (12) to (14) having one to two hydrocarbon groups having 1 to 30 carbon atoms in its molecule, not containing a hydrocarbon group having 31 or more carbon atoms, and A phosphoric acid ester salt obtained by reacting an acidic phosphoric acid ester or an acid phosphite having at least one hydroxyl group to neutralize a part or all of the remaining amino group and / or imino group; Or a so-called alkylene oxide adduct of an amine compound obtained by reacting an amine compound such as (14) with an alkylene oxide such as ethylene oxide or propylene oxide; Modified products of amine compounds obtained by combining modified; and the like.

Specific examples of the amine compound (F-1) or its derivative include laurylamine, lauryldiethylamine, and laurylamine because of their excellent friction characteristics of a wet clutch.
Amine compounds such as lauryl diethanolamine, dodecyl dipropanolamine, palmitylamine, stearylamine, stearyltetraethylenepentamine, oleylamine, oleylpropylenediamine, oleyldiethanolamine, N-hydroxyethyloleylimidazoline; alkylene oxide adducts of these amine compounds; Salts of these amine compounds with acidic phosphoric acid esters (for example, di-2-ethylhexyl phosphite) and acidic phosphites (for example, di-2-ethylhexyl phosphite); alkylene oxide adducts of these amine compounds and amine compounds Or a boric acid-modified (phosphite) phosphate salt of an amine compound; or a mixture thereof is particularly preferably used. More specifically, as the phosphorus compound of the above (F-2), for example, the following formula (15)
And a phosphite represented by the following formula (16).

[0043]

Embedded image In the formula (15), R ¹²⁶ represents an alkyl group or an alkenyl group having 6 to 30 carbon atoms, preferably 9 to 24 carbon atoms;
¹²⁷ and R ¹²⁸ each independently represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and F ¹ , F ² , F ³ and F
⁴ is individually an oxygen atom or a sulfur atom,
Further, it represents a group in which at least one of F ¹ , F ² , F ³ and F ⁴ is an oxygen atom.

[0044]

Embedded image In the formula (16), R ¹²⁹ represents an alkyl group or an alkenyl group having 6 to 30 carbon atoms, preferably 9 to 24 carbon atoms;
¹³⁰ and R ¹³¹ each independently represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms; F ⁵ , F ⁶ and F ⁷ each independently represent an oxygen atom or a sulfur atom;
^5, at least one of F ⁶ and F ⁷ shows the group is an oxygen atom.

The alkyl group or alkenyl group represented by R ¹²⁶ and R ¹²⁹ may be linear or branched, and preferably has 6 to 30, preferably 9 to 24 carbon atoms. When the number of carbon atoms of the alkyl group or the alkenyl group is less than 6 or more than 30, the friction characteristics of the wet clutch deteriorate, which is not preferable. Specific examples of the alkyl group or alkenyl group include, for example, various alkyl groups and alkenyl groups as described above.From the viewpoint of particularly excellent friction characteristics of a wet clutch, lauryl group, myristyl group, palmityl A straight-chain alkyl or alkenyl group having 12 to 18 carbon atoms such as a group, stearyl group, oleyl group and the like is particularly preferred.

Examples of the groups represented by R ¹²⁷ , R ¹²⁸ , R ¹³⁰ and R ¹³¹ include, independently of each other, a hydrogen atom;
Methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl,
Decyl group, undecyl group, dodecyl group, tridecyl group,
Tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl, henycosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, triacontyl (The alkyl groups may be linear or branched); butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl,
Decenyl group, undecenyl group, dodecenyl group, tridecenyl group, tetradecenyl group, pentadecenyl group, hexadecenyl group, heptadecenyl group, octadecenyl group, nonadecenyl group, icosenyl group, henycosenyl group, docosenyl group, tricosenyl group, tetracosenyl group, pentacosenyl group, pentacosenyl group Alkenyl groups such as, heptacocenyl group, octacocenyl group, nonacocenyl group and triacontenyl group (these alkenyl groups may be linear or branched, and the position of the double bond is arbitrary); cyclopentyl group, cyclohexyl group A cycloalkyl group having 5 to 7 carbon atoms such as a cycloheptyl group; a methylcyclopentyl group, a dimethylcyclopentyl group, a methylethylcyclopentyl group, a diethylcyclopentyl group, a methylcyclohexyl group, An alkylcycloalkyl group having 6 to 11 carbon atoms such as a methylcyclohexyl group, a methylethylcyclohexyl group, a diethylcyclohexyl group, a methylcycloheptyl group, a dimethylcycloheptyl group, a methylethylcycloheptyl group, and a diethylcycloheptyl group (for these alkyl groups, Aryl group such as phenyl group, naphthyl group, etc .: tolyl group, xylyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptyl 7 to 18 carbon atoms such as phenyl group, octylphenyl group, nonylphenyl group, decylphenyl group, undecylphenyl group and dodecylphenyl group
(The alkyl groups may be linear or branched, and the position of substitution with the aryl group is arbitrary); benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl And arylalkyl groups having 7 to 12 carbon atoms such as a phenylhexyl group (the alkyl groups may be linear or branched); and the like.

As the phosphorus compound (F-2), the above formula (15) is preferred because it is more excellent in the friction characteristics of a wet clutch.
Is preferably an acidic phosphoric acid ester in which at least one of R ¹²⁷ and R ¹²⁸ is a hydrogen atom, and an acidic phosphite in which at least one of R ¹³⁰ and R ¹³¹ is a hydrogen atom in the above formula (37). It is. Specific examples of the derivative of the phosphorus compound represented by (F-2) include acidic phosphate esters in which at least one of R ¹²⁷ and R ¹²⁸ in the above formula (15) is a hydrogen atom,
In the above formula (16), at least one of R ¹³⁰ and R ¹³¹
The acidic phosphite ester, which is a hydrogen atom, is reacted with ammonia or a nitrogen-containing compound such as an amine compound containing only a hydrocarbon group having 1 to 8 carbon atoms or a hydroxyl group-containing hydrocarbon group in the molecule, and remains. Salts in which some or all of the acidic hydrogen has been neutralized can be exemplified.

As the nitrogen-containing compound, specifically,
Ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, diethylamine, methylpropylamine, ethylpropylamine, dipropylamine And alkylamines such as methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine and dioctylamine (the alkyl group may be linear or branched); monomethanolamine, monoethanolamine Amine, monopropanolamine, monobutanolamine, monopentanolamine, monohexanolamine, monoheptanolamine, monooctanol Min, mono nonanol amine,
Dimethanolamine, methanolethanolamine, diethanolamine, methanolpropanolamine, ethanolpropanolamine, dipropanolamine,
Methanol butanolamine, ethanolbutanolamine, propanolbutanolamine, dibutanolamine, dipentanolamine, dihexanolamine,
Alkanolamines such as diheptanolamine and dioctanolamine (alkanol groups may be linear or branched); and mixtures thereof.

Specific examples of the phosphorus compound (F-2) or its derivative include monolauryl phosphate, dilauryl phosphate, monostearyl phosphate, distearyl, because of their excellent friction characteristics of wet clutches. Phosphate ester, monooleyl phosphate, dioleyl phosphate, monolauryl phosphite, dilauryl phosphite, monostearyl phosphite, distearyl phosphite, monooleyl phosphite, dioleyl phosphorous Acid ester, monolauryl thiophosphate, dilauryl thiophosphate, monostearyl thiophosphate,
Distearyl thiophosphate, monooleyl thiophosphate, dioleyl thiophosphate, monolauryl thiophosphite, dilauryl thiophosphite, monostearyl thiophosphite, distearyl thiophosphite, monooleyl Thiophosphites, dioleyl thiophosphites, and amine salts of these phosphates, phosphites, thiophosphates, thiophosphites (mono 2-
Ethylhexylamine salt), and mixtures thereof are particularly preferably used.

The fatty acid in the fatty acid amide or fatty acid metal salt of the above (F-3) may be a straight-chain fatty acid or a branched fatty acid, and may be a saturated fatty acid or an unsaturated fatty acid. Is 6 ~
30, preferably 9 to 24. When the number of carbon atoms of the alkyl group or alkenyl group of the fatty acid is less than 6 or more than 30, the friction characteristics of the wet clutch deteriorate, which is not preferable. Specific examples of the fatty acid include, for example, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, Saturated fatty acids such as icosanoic acid, henicicosanoic acid, docosanoic acid, tricosanoic acid, tetracosanoic acid, pentacosanoic acid, hexacosanoic acid, heptacosanoic acid, octacosanoic acid, nonacosanoic acid and triacontyl group (these saturated fatty acids may be linear or branched) ); Heptenoic acid, octenoic acid, nonenoic acid, decenoic acid, undecenoic acid, dodecenoic acid, tridecenoic acid, tetradecenoic acid, pentadecenoic acid, hexadecenoic acid, heptadecenoic acid, octadecenoic acid, nonadecenoic acid,
Icosenic acid, henicocenoic acid, docosenoic acid, trichosenoic acid, tetracosenoic acid, pentacosenoic acid, hexacosenoic acid, heptacosenoic acid, octacosenoic acid, nonacosenic acid,
Unsaturated fatty acids such as triacontenic acid (these unsaturated fatty acids may be linear or branched, and the position of the double bond is also arbitrary); From the point of view, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linear fatty acids derived from various fats and oils (coconut oil fatty acids and the like), and linear fatty acids synthesized by the oxo method, etc. A mixture of branched fatty acids is preferably used.

The fatty acid amide referred to in (F-3) includes
Specifically, for example, the above fatty acid or acid chloride thereof is obtained by reacting ammonia or a nitrogen-containing compound such as an amine compound containing only a hydrocarbon group having 1 to 8 carbon atoms or a hydroxyl group-containing hydrocarbon group in a molecule. Amide and the like. Specific examples of the nitrogen-containing compound include ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, and diethylamine. , Methylpropylamine, ethylpropylamine,
Dipropylamine, methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine,
Alkylamines such as dioctylamine (the alkyl group may be linear or branched); monomethanolamine, monoethanolamine, monopropanolamine, monobutanolamine, monopentanolamine, monohexanolamine, monoheptanolamine , Monooctanolamine, monononanolamine, dimethanolamine, methanolethanolamine, diethanolamine, methanolpropanolamine, ethanolpropanolamine, dipropanolamine, methanolbutanolamine, ethanolbutanolamine, propanolbutanolamine, dibutanolamine, dipentanol Alkanolamines such as amines, dihexanolamine, diheptanolamine, dioctanolamine (alkanol groups are Also linear or branched); and mixtures thereof and the like can be exemplified.

As the fatty acid amide (F-3), specifically, from the viewpoint of being superior in friction characteristics of a wet clutch,
Lauric amide, lauric diethanolamide, lauric monopropanolamide, myristic amide, myristic diethanolamide, myristic monopropanolamide, palmitic amide, palmitic diethanolamide, palmitic monopropanolamide, stearic amide, stearin Acid diethanolamide, stearic acid monopropanolamide, oleic acid amide, oleic acid diethanolamide, oleic acid monopropanolamide, coconut oil fatty acid amide,
Coconut oil fatty acid diethanolamide, coconut oil fatty acid monopropanolamide, synthetic mixed fatty acid amide having 12 to 13 carbon atoms, synthetic mixed fatty acid diethanolamide having 12 to 13 carbon atoms, synthetic mixed fatty acid monopropanolamide having 12 to 13 carbon atoms, and A mixture of these is particularly preferably used. On the other hand, specific examples of the fatty acid metal salt referred to in (F-3) include alkaline earth metal salts (magnesium salt, calcium salt, etc.) and zinc salt of the above fatty acid. As the fatty acid metal salt of (F-3), specifically, calcium laurate, calcium myristate, calcium palmitate, calcium stearate, calcium oleate, calcium oleate fatty acid, Carbon number 12-1
3, synthetic mixed fatty acid calcium, zinc laurate, zinc myristate, zinc palmitate, zinc stearate,
Zinc oleate, coconut oil fatty acid zinc, carbon number 12-13
Particularly preferred are zinc mixed fatty acids, and mixtures thereof.

One or more arbitrarily selected components (F) can be added in any amount as long as they do not affect other performances, such as oxidation stability. In order to increase the durability of the friction characteristics, it is necessary to prevent the deterioration of the friction characteristics due to the deterioration of the component (F).
It is effective to mix a large amount of the components in order to increase the durability of the friction characteristics. However, if the amount is too large, the coefficient of static friction, which needs to be high to maintain the engagement of the wet clutch, also decreases. Therefore,
There is a limit to the amount of component (F). Therefore, when the component (F) is contained in the traction drive fluid of the present invention, the content thereof is not particularly limited.
0.005 to 0.005
It is preferably 3.0% by mass, more preferably 0.01 to 2.0% by mass. When it is necessary to mix the component (F) in an amount larger than this limit in order to increase the durability of the friction characteristics, an additive (component (H)) for increasing the static friction coefficient is added. Can do it. The component (H) mentioned here includes the following. (H-1) A compound having the polar group represented by the component (F) in the same molecule and wherein the lipophilic group is a hydrocarbon group having 100 or less carbon atoms. In using the component (H-1), the polar group may be the same as or different from the component (F) used. (H-2) A nitrogen-containing compound (for example, succinimide or amide compound) having a hydrocarbon group having 60 or less carbon atoms, or a boron compound thereof (for example, boric acid or the like)
A compound that is modified with sulfur or a sulfur compound.

When the component (F) and the component (H) are used together in the traction drive fluid of the present invention, the component (H)
Although the content of the component is not particularly limited, it is usually 0.1 to 10.0% by mass based on the total amount of the traction drive fluid.
Is preferably, and more preferably 0.5 to 3.0% by mass. When the content of the component (H) is less than 0.1% by mass, the effect of increasing the static friction coefficient due to the combined use of the component (H) is poor, whereas when it exceeds 10.0% by mass, the low-temperature fluidity and the oxidation stability. Is worse, and thus it is not preferable.

The traction drive fluid of the present invention preferably contains (G) a metal-based detergent.
By blending the metal-based detergent (component (G)), it is possible to optimize the friction characteristics of the wet clutch and to suppress a decrease in strength against repeated compression. (G) The metal-based detergent has a total base number of 20 to 450 mgKOH /
g, preferably 50 to 400 mg KOH / g of a basic metal-based detergent. The total base number referred to here is
6. JIS K2501 "Petroleum products and lubricating oils-Neutralization number test method" Means the total base number measured by the perchloric acid method in accordance with Total base number of metal detergent is 20m
If it is less than gKOH / g, the effect of suppressing the decrease in strength of the wet clutch against repeated compression is insufficient, while if the total base number exceeds 450 mgKOH / g, it is structurally unstable, and Each of them is not preferable because storage stability is deteriorated.

Specific examples of the component (G) include (G-1) an alkaline earth metal sulfonate having a total base number of 20 to 450 mg KOH / g, and (G-2) an alkaline earth metal sulfonate having a total base number of 20 to 450 mg KOH / g. Earth metal phenate (G-3) One or more metal detergents selected from alkaline earth metal salicylates having a total base number of 20 to 450 mgKOH / g.

More specifically, the (G-1) alkaline earth metal sulfonate is, for example, an alkyl obtained by sulfonating an alkyl aromatic compound having a molecular weight of 100 to 1500, preferably 200 to 700. Alkaline earth metal salts of aromatic sulfonic acids,
In particular, magnesium salts and / or calcium salts are preferably used, and specific examples of the alkyl aromatic sulfonic acid include so-called petroleum sulfonic acid and synthetic sulfonic acid. As the petroleum sulfonic acid, generally, a sulfonated alkyl aromatic compound of a lubricating oil fraction of a mineral oil, a so-called mahoganic acid which is a by-product of white oil production, and the like are used. As the synthetic sulfonic acid, for example, an alkylbenzene having a linear or branched alkyl group, which is obtained as a by-product from an alkylbenzene production plant, which is a raw material of a detergent, or obtained by alkylating a polyolefin to benzene, is used as a raw material. A sulfonated product thereof, or a sulfonated product of dinonylnaphthalene is used. The sulfonating agent for sulfonating these alkyl aromatic compounds is not particularly limited, but fuming sulfuric acid or sulfuric acid is usually used. Further, as the (G-2) alkaline earth metal phenate mentioned here, more specifically, it has 4 to 4 carbon atoms.
30, preferably 6 to 18 alkylphenols having at least one linear or branched alkyl group, alkylphenol sulfide obtained by reacting this alkylphenol with elemental sulfur, or alkylphenol obtained by reacting this alkylphenol with formaldehyde Alkaline earth metal salts, especially magnesium salts and / or calcium salts, of the Mannich reaction product are preferably used.

Further, the (G-3) alkaline earth metal salicylate mentioned here is more specifically a compound having 4 carbon atoms.
Alkaline earth metal salts of alkyl salicylic acid having at least one linear or branched alkyl group of from 30 to 30, preferably from 6 to 18, especially magnesium salts and / or calcium salts are preferably used. Alkaline earth metal sulfonates, alkaline earth metal phenates and alkaline earth metal salicylates have a metal salt of 20%.
Alkyl aromatic sulfonic acid, alkyl phenol, alkyl phenol sulfide, Mannich reaction product of alkyl phenol, alkyl salicylic acid, etc., as long as it is in the range of ~ 450 mgKOH / g,
Reaction with alkaline earth metal bases such as oxides and hydroxides of magnesium and / or calcium alkaline earth metals, or replacement with alkaline earth metal salts once as alkali metal salts such as sodium and potassium salts In addition to the neutral salt (normal salt) obtained by the above-mentioned process, furthermore, these neutral salt (normal salt) and excess alkaline earth metal salt or alkaline earth metal base (hydroxide of alkaline earth metal, Oxide) in the presence of water, or overbased by reacting a neutral salt (normal salt) with a base of an alkaline earth metal in the presence of carbon dioxide. Salts (ultrabasic salts) are also included. These reactions are usually performed in a solvent (such as an aliphatic hydrocarbon solvent such as hexane, an aromatic hydrocarbon solvent such as xylene, or a light lubricating base oil). In addition, the metal-based detergent is usually commercially available in a diluted state with a light lubricating base oil or the like, and is available, but generally has a metal content of 1.0 to 20.
%, Preferably 2.0 to 16% by mass.

In the case where the component (G) is contained in the traction drive fluid of the present invention, the content of the component (G) is not particularly limited, but is usually 0.01 to 5.0% based on the total amount of the traction drive fluid. It is preferably 0% by mass, more preferably 0.05 to 4.0% by mass. When the content of the component (G) is less than 0.01% by mass, the effect of suppressing a decrease in the strength of the wet clutch against repeated compression is insufficient. On the other hand, when the content exceeds 5.0% by mass, the composition is oxidized. Each of them is not preferable because the stability is lowered. By adding the components (D), (E), (F) and (G), the traction drive fluid of the present invention has the abrasion resistance, oxidation stability and cleanliness required for the hydraulic control mechanism. It is possible to add friction characteristics to the wet clutch required for the friction characteristics control mechanism of the wet clutch, strength against repeated compression of the wet clutch, etc.
For the purpose of further improving these performances, and further improving the corrosion resistance to non-ferrous metals such as copper-based materials and the durability of resins such as nylon materials, if necessary, an antioxidant and an extreme A pressure additive, a corrosion inhibitor, a rubber swelling agent, an antifoaming agent, a coloring agent and the like may be contained alone or in combination of several kinds.

As the antioxidant, any one generally used in lubricating oils such as phenolic compounds and amine compounds can be used. Specifically, alkylphenols such as 2,6-di-tert-butyl-4-methylphenol, and bisphenols such as methylene-4,4-bisphenol (2,6-di-tert-butyl-4-methylphenol) , Naphthylamines such as phenyl-α-naphthylamine, dialkyldiphenylamines, zinc dialkyldithiophosphates such as zinc di-2-ethylhexyldithiophosphate, (3,5-di-tert)
-Butyl-4-hydroxyphenyl) fatty acid (such as propionic acid) and a monohydric or polyhydric alcohol such as methanol, octadecanol, 1,6 hexadiol, neopentyl glycol, thiodiethylene glycol, triethylene glycol, and pentaerythritol. And the like. One or two or more compounds arbitrarily selected from these can be contained in an arbitrary amount. Usually, the content is 0.01 to 5.0 based on the total amount of the traction drive fluid. It is desirably 0% by mass.

The extreme pressure additives include, for example, sulfur compounds such as disulfides, sulfurized olefins, and sulfurized fats and oils. One or two or more compounds arbitrarily selected from these can be contained in an arbitrary amount. Usually, the content is 0.01 to 5.0 based on the total amount of the traction drive fluid. It is desirably 0% by mass. Examples of the corrosion inhibitor include benzotriazole-based, tolyltriazole-based, thiadiazole-based, and imidazole-based compounds. One or two or more compounds arbitrarily selected from these can be contained in an arbitrary amount, but usually, the content is 0.1% based on the total amount of the traction drive fluid.
It is desirably from 0.1 to 3.0% by mass. Examples of the antifoaming agent include silicones such as dimethyl silicone and fluorosilicone. One or two or more compounds arbitrarily selected from these can be contained in an arbitrary amount. Usually, the content is
0.001-0.001 based on the total volume of traction drive fluid
Preferably, it is 0.05% by mass. The colorant can be contained in any amount, but usually the content is 0.001 to 1.
It is desirably 0% by mass.

[0062]

As described above, the traction drive fluid of the present invention not only has excellent power transmission capability, but also serves as a hydraulic control fluid that is not provided in conventional traction drive fluids on the market. And the ability as a fluid for controlling the friction characteristics of a wet clutch can be obtained, and the performance can be fully exhibited as a traction drive fluid for automobiles, especially as a fluid for continuously variable transmissions for automobiles. It became.

[0063]

EXAMPLES Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited thereto. Fluid A was obtained as the component (A) of the present invention by the following method. Fluid A 800 g of commercially available cumene dimer was placed in a 2 L autoclave, 8 g of a nickel-based hydrogenation catalyst was added, and hydrogen absorption was performed at 150 ° C. under a maximum pressure of 6.86 × 10 ⁶ Pa (70 kg / cm ² ). The reaction was carried out until the solution disappeared to obtain a fluid A containing the following compound (A) as a main component. The content ratio of the compound (A) in the fluid A was about 95%.

Embedded image

The fluids A and 2-
Methylcyclohexylcyclohexanecarboxylate (fluid B) and 2-methyl-2,4-dicyclohexylpentane (fluid C) already used in the field of industrial machinery and known to have a high traction coefficient are used. And various mixed fluids (fluids 1 to 3 and comparative fluids 1 to 3) in which these components were mixed at the ratios shown in Table 1.
3) was prepared. For these adjusted fluids 1 to 3 and comparative fluids 1 to 3, the traction coefficient and -30
The low temperature viscosity (Brookfield method) at ° C was measured. The traction coefficient was determined using a 4-roller traction coefficient tester at a peripheral speed of 5.23 m / s and an oil temperature of 12
The measurement was performed under the test conditions of 0 ° C., a maximum Hertz pressure of 1.10 GPa, and a slip ratio of 2%.

[0065]

[Table 1]

The above fluid A, fluid B, fluid C, and (C) polymethacrylate (PMA) having a number average molecular weight of 18,000, polyisobutylene (PIB) having a number average molecular weight of 2,700, and a number average molecular weight of Fluids were prepared by mixing various viscosity index improvers selected from 9,900 ethylene-α-olefin copolymer hydrides (OCP) in the proportions shown in Table 2 (fluids 4 to 6 and comparative fluids 4 to 6). .
For these fluids, the kinematic viscosity at 100 ° C, -3
The low temperature viscosity (BF viscosity) at 0 ° C. and the traction coefficient were measured. The results are shown in Table 2.

[0067]

[Table 2]

As is evident from the results in Table 2, by blending the viscosity index improver (C), the high-temperature viscosity can be greatly increased without largely changing its traction coefficient and low-temperature viscosity characteristics.

A mixture of the above fluids A and B, (C) a viscosity index improver, (D) an ashless dispersant, and (E) a phosphorus-based additive in the proportions shown in Table 3 is used. Prepared (fluids 7-13). The fluids 7 to 13 thus adjusted were each evaluated for wear resistance and oxidation stability. Table 3 shows the results. The abrasion resistance is AST
80 ° C, 1800 rpm, 2 according to MD2266
A Shell four-ball test was performed under the conditions of 94 N (30 kgf) for 60 minutes, and the steel ball after the test was evaluated by the wear scar diameter. The oxidative stability was evaluated by performing an oxidative test at 150 ° C. for 96 hours in accordance with the lubricating acid value stability test of JIS K2514.

[0070]

[Table 3]

The terms in Table 3 refer to the following compounds. (1) OCP: same as OCP in Table 2 (2) PMA: same as PMA in Table 2 (3) Ashless dispersant A: alkenyl succinimide (bis type, number average molecular weight 5500) (4) Ashless dispersant B : Borated alkenyl succinimide (monotype, number average molecular weight 4500) (5) Phosphorus additive A: Diphenyl hydrogen phosphite (6) Antioxidant A: Bisphenol antioxidant

As is evident from the results in Table 3, by combining (D) the ashless dispersant and (E) the phosphorus-based additive in combination, the abrasion resistance and oxidative stability required for the traction drive fluid are reduced. Cleanliness can be imparted.

Fluid A, Fluid B, (C) viscosity index improver, (D) ashless dispersant, (E) phosphorus-based additive, (F)
Table 4 shows additives such as friction modifiers and (G) metallic detergents.
(Fluids 14 to 19) were prepared. A low-speed slip test was performed on each of the adjusted fluids 14 to 19 and the fluids 1 and 7 using a slip tester under the following conditions, and the slip speed dependence (μ (1 rpm) / μ ( 50rpm) value:
When this value exceeds 1, a positive gradient is used, and when this value is less than 1, a negative gradient is used). [Low-speed sliding test] (1) Test conditions: Conforms to JASO M349-95 (Testing method for automatic transmission oil shudder prevention performance) (2) Oil amount: 0.2 liter (3) Oil temperature: 80 ° C (4) Surface pressure ： 0.98MPa

[0074]

[Table 4]

The terms in Table 4 refer to the following compounds. (1) OCP: same as OCP in Table 2 (2) PMA: same as PMA in Table 2 (3) Ashless dispersant A: same as ashless dispersant A in Table 3 (4) Ashless dispersant B: same as Table 3 (5) Phosphorous additive A: same as phosphorus additive A in Table 3 (6) Antioxidant A: same as antioxidant A in Table 3 (7) Friction modifier A: Ethoxylated oleylamine (8) Friction modifier B: Oleylamine (9) Mg sulfonate A: Petroleum system, total base number (perchloric acid method) 300 mgKOH / g, Mg content 6.9% by mass (10) Ca sulfonate A: 11. Petroleum, total base number (perchloric acid method) 300 mgKOH / g, Mg content
0% by mass

As is evident from the results in Table 4, the addition of (F) a friction modifier and / or (G) a metal-based detergent optimizes wet clutches such as shift clutches and slip lock-up clutches. Friction properties can be imparted.

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C10M 133/06 C10M 133/06 133/16 133/16 133/46 133/46 133/54 133/54 133/56 133 / 56 137/02 137/02 137/04 137/04 137/08 137/08 137/10 137/10 AZ B 143/02 143/02 145/14 145/14 145/16 145/16 149/02 149/02 159/22 159/22 159/24 159/24 // C10N 10:04 C10N 10:04 20:00 20:00 Z 20:04 20:04 30:02 30:02 30:04 30:04 30:06 30:06 40:04 40:04 (72) Inventor Tetsuo Okawa 1-3-2 Nishi-Shimbashi, Minato-ku, Tokyo Nishiishi Mitsui Co., Ltd. Lubricants Department (72) Inventor Toru Matsuoka Yokohama, Kanagawa 8 Chidori-cho, Naka-ku, Japan Mitsui Nishiishi Co., Ltd. Lubricants Department Lubricants Laboratory F-term (Reference) 4H104 BA02A BA08C BB16C BB32A BE02C BE04C BE30C BF01C BF03C BH02C BH03C BH05C BH06C BH07C BH08C CA01C CB08C CB08C CB08C CB08C EA22C EB05 EB07 EB08 FA02 LA01 LA02 LA03 PA03

Claims (6)

[Claims] (A) a naphthene ring-containing compound represented by the following general formula (1): (Wherein, R ^{1 to} R ⁶ are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring)
Is shown. ) And (B) a naphthene ring-containing ester represented by the following general formula (2): (Wherein, R ^{7 to} R ¹² each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may contain a naphthene ring)). . 2. The traction drive fluid according to claim 1, further comprising (C) a viscosity index improver. 3. The traction drive fluid according to claim 2, wherein the viscosity index improver (C) is an ethylene-α-olefin copolymer having a number average molecular weight of 800 to 150,000 or a hydride thereof. 4. The traction drive fluid according to claim 1, further comprising (D) an ashless dispersant and (E) a phosphorus-based additive. 5. The traction drive fluid according to claim 1, further comprising (F) at least one alkyl or alkenyl group having 6 to 30 carbon atoms in the molecule, and A traction drive fluid comprising a friction modifier which does not contain a hydrocarbon group having 31 or more carbon atoms in a molecule. 6. The traction drive fluid according to claim 1, further comprising (G) a metal-based detergent having a total base number of 20 to 450 mgKOH / g. And traction drive fluid.