JP2002194372A - Viscosity index improver and lubricating oil composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a viscosity index improver excellent in low-temperature viscosity for a fluid for traction drive and of 8.2-10.0 solubility parameter. SOLUTION: This viscosity index improver for a fluid for traction drive comprises a vinyl polymer as the essential component, wherein the vinyl polymer has >9.5 but <=11.0 solubility parameter, 1.0-6.0 HLB number, 5,000-500,000 weight-average molecular weight and <=-10 deg.C crystallization onset temperature measured by a differential scanning calorimeter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a viscosity index improver. Specifically, the solubility parameter is 8.2 to 10.
The present invention relates to a viscosity index improver having excellent low-temperature viscosity for a traction drive fluid of 0.

[0002]

2. Description of the Related Art Conventionally, in the field of industrial machinery, a traction drive fluid has been used in a traction drive type power transmission device that transmits power via an oil film.

[0003]

A commercially available traction drive fluid includes "Santo Truck".
When this is used for a continuously variable transmission for automobiles, the traction coefficient representing the power transmission capability is high, but the low-temperature fluidity is poor, and further improvement is required.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventors have found a viscosity index improver excellent in low-temperature fluidity when used in a traction drive fluid, and have reached the present invention. That is, the present invention relates to a crystallization starter having a solubility parameter of 9.5 to 11.0, an HLB value of 1.0 to 6.0, a weight average molecular weight of 5,000 to 500,000, and a differential scanning calorimeter. It is a viscosity index improver for a traction drive fluid containing a vinyl polymer (A) having a temperature of -10 ° C or lower as an essential component. The present invention also provides a lubricating oil composition comprising a traction drive fluid having a solubility parameter of 8.2 to 10.0 and the viscosity index improver, wherein the amount of the viscosity index improver is the traction drive fluid. It is also a lubricating oil composition which is 0.05 to 30% by mass. Hereinafter, the present invention will be described in detail.

[0005] The viscosity index improver of the present invention contains a vinyl polymer (A). The polymer (A) used in the present invention is not particularly limited as long as a vinyl monomer is an essential constituent unit. Examples of the vinyl monomer include the following (a) to (m). (A) Vinyl hydrocarbons (b) Carboxyl group-containing vinyl monomers and salts thereof (c) Sulfone group-containing vinyl monomers, vinyl sulfuric acid monoesters and salts thereof (d) Phosphate group-containing vinyl monomers ( e) Hydroxyl group-containing vinyl monomer (f) Nitrogen-containing vinyl monomer (g) Epoxy group-containing vinyl monomer (h) Halogen element-containing vinyl monomer (i) Vinyl esters, vinyl ethers, vinyl ketones (j) alkyl (meth) ) Acrylate (k) Vinyl monomer having polyalkylene glycol chain (l) Poly (meth) acrylates (m) Other vinyl monomers

Hereinafter, specific examples of the above (a) to (m) will be described. (A) Vinyl hydrocarbons (a1) Aliphatic vinyl hydrocarbons: ethylene, propylene, butene, isobutylene, pentene, heptene, diisobutylene, octene, dodecene, octadecene, butadiene, isoprene, 1,4-pentadiene, 1, 6-
Hexadiene, 1,7-octadiene, α-
Olefins, etc. (a2) Alicyclic vinyl hydrocarbon: cyclohexene,
(Di) cyclopentadiene, pinene, limonene, indene, vinylcyclohexene, ethylidene bicycloheptene, etc. (a3) Aromatic vinyl hydrocarbon: styrene, α-methylstyrene, vinyltoluene, 2,4-dimethylstyrene, ethylstyrene, Isopropyl styrene, butyl styrene, phenyl styrene, cyclohexyl styrene,
Benzyl styrene, crotyl benzene, vinyl naphthalene, divinyl benzene, divinyl toluene, divinyl xylene, divinyl ketone, trivinyl benzene, etc.

(B) Carboxyl group-containing vinyl monomers and salts thereof (meth) acrylic acid, (maleic anhydride) maleic acid, monoalkyl maleate, fumaric acid, monoalkyl fumarate, crotonic acid, itaconic acid, itaconic acid Carboxyl group-containing vinyl monomers such as monoalkyl esters, itaconic acid glycol monoethers, citraconic acid, citraconic acid monoalkyl esters, and cinnamic acid;
And alkali metal salts (such as sodium salts and potassium salts), alkaline earth metal salts (such as calcium salts and magnesium salts), amine salts and ammonium salts thereof.

(C) a vinyl monomer containing a sulfone group,
Vinyl sulfuric acid monoesters and salts thereof vinyl sulfonic acid (salt), (meth) allyl sulfonic acid (salt), methyl vinyl sulfonate, styrene sulfonic acid (salt), α-methyl styrene sulfonic acid (salt), Sulfopropyl (meth) acrylate, 2-hydroxy-
3- (meth) acryloxypropylsulfonic acid (salt),
2- (meth) acryloylamino-2,2-dimethylethanesulfonic acid (salt), 2- (meth) acryloyloxyethanesulfonic acid (salt), 3- (meth) acryloyloxy-2-hydroxypropanesulfonic acid (salt) ), 2
-(Meth) acrylamido-2-methylpropanesulfonic acid (salt), 3- (meth) acrylamido-2-hydroxypropanesulfonic acid (salt), alkyl (3-C)
18) Allyl sulfosuccinic acid (salt), poly (n = 2 to 3)
0) Oxyalkylene (ethylene, propylene, butylene: single, random, or block) mono (meth)
Sulfate of acrylate (salt) [poly (n = 5
-15) Oxypropylene monomethacrylate sulfate (salt), etc.], polyoxyethylene polycyclic phenyl ether sulfate (salt), and other compounds represented by the following general formulas. [Examples of the salt in the above include an alkali metal salt (sodium salt, potassium salt and the like), an alkaline earth metal salt (calcium salt, magnesium salt and the like), an amine salt and an ammonium salt. ]

[0009]

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Wherein R is an alkyl group having 1 to 15 carbon atoms, A is an alkylene group having 2 to 4 carbon atoms, and when n is plural, they may be the same or different; X represents an alkali metal, an alkaline earth metal, ammonium, or an amine cation;
r represents a benzene ring, and n represents an integer of 1 to 50. )

[0011]

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Wherein R is an alkyl group having 1 to 15 carbon atoms, A is an alkylene group having 2 to 4 carbon atoms, and when n is plural, they may be the same or different; X represents an alkali metal, an alkaline earth metal, ammonium, or an amine cation;
r represents a benzene ring, and n represents an integer of 1 to 50. )

[0013]

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(In the formula, R 'represents an alkyl group having 1 to 15 carbon atoms which may be substituted by a fluorine atom, and X represents an alkali metal, alkaline earth metal, ammonium or amine cation.)

(D) Phosphoric acid group-containing vinyl monomer (meth) acrylic acid hydroxyalkyl phosphoric acid monoester, for example, 2-hydroxyethyl (meth) acryloyl phosphate, phenyl-2-acryloyloxyethyl phosphate, (meth) Alkyl phosphonic acrylates, for example, 2-acryloyloxyethyl phosphonic acid (salt)

(E) Hydroxyl group-containing vinyl monomer hydroxystyrene, N-methylol (meth) acrylamide, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, (meth) allyl alcohol Crotyl alcohol, isocrotyl alcohol, 1-buten-3-ol, 2-buten-1-ol, 2-buten-1,4-diol, propargyl alcohol, 2-hydroxyethylpropenyl ether, sucrose allyl ether ,etc

(F) Nitrogen-containing vinyl monomer (f1) Amino group-containing vinyl monomer: aminoethyl (meth) acrylate, dimethylaminoethyl (meth)
Acrylate, diethylaminoethyl (meth) acrylate, t-butylaminoethyl methacrylate, N-aminoethyl (meth) acrylamide, (meth) allylamine, morpholinoethyl (meth) acrylate, 4-vinylpyridine, 2-vinylpyridine, crotylamine,
N, N-dimethylaminostyrene, methyl α-acetoaminoacrylate, vinylimidazole, N-vinylpyrrole, N-vinylthiopyrrolidone, N-arylphenylenediamine, aminocarbazole, aminothiazole, aminoindole, aminopyrrole, aminoimidazole, Aminomercaptothiazole, salts thereof and the like (f2) Amide group-containing vinyl monomer: (meth) acrylamide, N-methyl (meth) acrylamide, N-
Butyl acrylamide, diacetone acrylamide, N
-Methylol (meth) acrylamide, N, N'-methylene-bis (meth) acrylamide, cinnamic acid amide,
N, N-dimethylacrylamide, N, N-dibenzylacrylamide, methacrylformamide, N-methyl N-vinylacetamide, N-vinylpyrrolidone, etc. (f3) Nitrile group-containing vinyl monomer: (meth) acrylonitrile, cyanostyrene, etc. f4) A quaternary ammonium cation group-containing vinyl monomer: containing a tertiary amine group such as dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylamide, diethylaminoethyl (meth) acrylamide, and diallylamine Quaternized vinyl monomer (quaternized using a quaternizing agent such as methyl chloride, dimethyl sulfate, benzyl chloride, dimethyl carbonate) (f5) Nitro group-containing vinyl monomer: Toro styrene, and the like

(G) Epoxy Group-Containing Vinyl Monomer Glucidyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, p-vinylphenylphenyl oxide, etc.

(H) Vinyl monomers containing halogen elements: vinyl chloride, vinyl bromide, vinylidene chloride, allyl chloride, chlorostyrene, bromostyrene, dichlorostyrene, chloromethylstyrene, tetrafluorostyrene, chloroprene, etc.

(I) vinyl esters, vinyl ethers,
Vinyl ketones vinyl acetate, vinyl butyrate, vinyl propionate,
Vinyl butyrate, diallyl phthalate, diallyl adipate, isopropenyl acetate, vinyl methacrylate, methyl 4-vinyl benzoate, cyclohexyl methacrylate, benzyl methacrylate, phenyl (meth) acrylate, vinyl methoxy acetate, vinyl benzoate, vinyl methyl ether, vinyl ethyl ether, vinyl Propyl ether, vinyl butyl ether, vinyl 2-ethylhexyl ether, vinyl phenyl ether, vinyl 2-methoxyethyl ether, methoxybutadiene, vinyl 2-butoxyethyl ether,
3,4-dihydro-1,2-pyran, 2-butoxy-2 '
-Vinyloxy diethyl ether, vinyl 2-ethyl mercapto ethyl ether, vinyl methyl ketone, vinyl ethyl ketone, vinyl phenyl ketone, divinyl sulfide, p-vinyl diphenyl sulfide, vinyl ethyl sulfide, vinyl ethyl sulfone, divinyl sulfone, divinyl sulfoxide Side, dialkyl fumarate (two alkyl groups having 2 to 8 carbon atoms, straight chain,
A branched or alicyclic group), dialkyl maleate (two alkyl groups are a straight, branched or alicyclic group having 2 to 8 carbon atoms), poly (meta ) Allyloxyalkanes [diaryloxyethane, triaryloxyethane, tetraaryloxyethane, tetraaryloxypropane, tetraaryloxybutane, tetrametaryloxyethane, etc.], etc.

(J) Alkyl (meth) acrylate An alkyl (meth) acrylate having a linear, branched or cyclic alkyl group having 1 to 30 carbon atoms, for example, methyl (meth) acrylate, ethyl (meth) acrylate,
Propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, dodecyl (meth)
Acrylate, hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, eicosyl (meth)
Examples include acrylate, docosyl (meth) acrylate, tetracosyl (meth) acrylate, octakosyl (meth) acrylate, and triacontyl (meth) acrylate. The alkyl group of these monomers may be a straight-chain alkyl group having any side chain. . Of these, an alkyl (meth) acrylate having an alkyl group having 1 to 22 carbon atoms is preferable.

(K) Vinyl monomer having a polyalkylene glycol chain, polyethylene glycol (molecular weight: 300), mono (meth)
Acrylate, polypropylene glycol (molecular weight 50
0) Monoacrylate, methyl alcohol ethylene oxide 10 mol adduct (meth) acrylate, lauryl alcohol ethylene oxide 30 mol adduct (meth)
Acrylate, etc.

(L) Poly (meth) acrylates Poly (meth) acrylates of polyhydric alcohols: ethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylol Propane tri (meth) acrylate, polyethylene glycol di (meth) acrylate, etc.

(M) Other vinyl monomers acetoxystyrene, phenoxystyrene, ethyl α-
Examples include ethoxy acrylate, isocyanatoethyl (meth) acrylate, cyanoacrylate, and m-isopropenyl-α, α-dimethylmethylbenzyl isocyanate.

Of these, preferred are (a3) an aromatic vinyl hydrocarbon, (b) a carboxyl group-containing vinyl monomer, (c) a sulfone group-containing vinyl monomer, a vinyl ester of sulfuric acid monoester, and (d) phosphorus Acid group-containing vinyl monomer, (e) hydroxyl group-containing vinyl monomer, (f) nitrogen-containing vinyl monomer, (i) vinyl ester, vinyl ether, vinyl ketones, (j) alkyl (meth) acrylate and (k) poly A vinyl monomer having an alkylene glycol chain,

More preferably, (a3) an aromatic vinyl hydrocarbon, (b) a vinyl monomer containing a carboxyl group, (e) a vinyl monomer containing a hydroxyl group, (f)
3) A vinyl monomer having a nitrile group, (i) a vinyl ester, a vinyl ether, (j) an alkyl (meth) acrylate, and (k) a vinyl monomer having a polyalkylene glycol chain.

Particularly preferably, (j) alkyl (meth) acrylate is an essential constituent unit, and if necessary,
(A3) aromatic vinyl hydrocarbon, (b) carboxyl group-containing vinyl monomer, (e) hydroxyl group-containing vinyl monomer, (f3) nitrile group-containing vinyl monomer, (i) vinyl ester, vinyl ether and (k) And (3) a combination in which at least one monomer selected from the group of vinyl monomers having a polyalkylene glycol chain is a constituent unit.

For example, in the case of the alkyl (meth) acrylate alone, dodecyl methacrylate: methyl acrylate = (4
0-60 mass%): (40-60 mass%), dodecyl methacrylate: butyl acrylate = (1
0-27% by mass): (73-90% by mass) Octyl acrylate: methyl methacrylate = (5
0-61% by mass): (20-39% by mass), octyl acrylate: methyl acrylate = (40
-80% by mass): (20-60% by mass), octyl methacrylate: methyl methacrylate =
(30 to 55% by mass): (45 to 70% by mass), octyl methacrylate: methyl acrylate = (4
0 to 68% by mass): (32 to 60% by mass).

Examples of the combination of an alkyl (meth) acrylate and another monomer include: (1) dodecyl methacrylate: styrene = (50 to 6
(2% by mass): (38 to 50% by mass), (2) octyl acrylate: styrene = (50 to 81)
(3%) dodecyl methacrylate: hydroxyethyl acrylate = (70-88% by mass): (12-30% by mass), (4) dodecyl methacrylate: methacrylic acid = (70% by mass)
-81% by mass): (19-30% by mass), (5) dodecyl methacrylate: acrylonitrile =
(65 to 89% by mass): (11 to 35% by mass), (6) dodecyl methacrylate: vinyl acetate = (30 to 89% by mass)
(7) dodecyl acrylate: butyl glycol acrylate = (0 to 20% by mass): (80 to 100% by mass)
And the like.

The content of the alkyl (meth) acrylate in the polymer (A) is usually 50 to 100% by mass, preferably
It is 60 to 100% by mass, particularly preferably 70 to 100% by mass.

The solubility parameter of the polymer (A) in the present invention is more than 9.5 and not more than 11.0, preferably from 9.6 to 10.9, particularly preferably from 9.7 to 10.
8 The solubility parameter of the present invention is Fed.
ors method [Poym. Eng. Sci. 14 (2) 15
2, (1974)]. When the solubility parameter is less than 9.5, the viscosity index and the solubility become poor. When it exceeds 11.0, the demulsifying property and the solubility become poor.

The HLB value of the polymer (A) in the present invention is from 1.0 to 6.0, preferably from 1.5 to 6.0, particularly preferably from 2.0 to 5 from the viewpoint of demulsifying properties. .5. In addition, this HLB value is a value calculated by HLB (“Principle of New Surfactants”, published by Sanyo Kasei Kogyo Co., Ltd., page 197) by a method (Oda method) calculated from the ratio of inorganic to organic. If the HLB value is less than 1.0, the viscosity index becomes poor, and if it exceeds 6.0, the demulsifying properties become poor.

The weight average molecular weight (Mw) of the polymer (A) in the present invention is from 5,000 to 500,000, preferably from 10,000 in view of a thickening effect and shear stability.
00 to 300,000, particularly preferably 20,000 to
100,000. In addition, this molecular weight is a molecular weight converted into polystyrene by gel permeation chromatography. When Mw is less than 5,000, the viscosity is poor, and when it exceeds 500,000, the shear stability deteriorates.

The crystallization onset temperature of the polymer (A) in the present invention by a differential scanning calorimeter is -10 ° C or less, preferably -20 ° C or less, particularly preferably -30 ° C from the viewpoint of low-temperature characteristics. It is as follows. The crystallization onset temperature of the differential scanning calorimeter of the present invention was determined by PERKIN-ELM.
Using UNIX DSC7 (manufactured by ER Co.), 5 mg of the polymer was used as a sample, and 140 ° C. to −80 ° C. at an isothermal rate of 10 ° C./min.
This is the crystallization temperature observed when cooling. When the crystallization start temperature exceeds -10 ° C, low-temperature fluidity deteriorates.

The viscosity index improver of the present invention further comprises the following (B) and / or the following (C) in addition to the polymer (A).
It is preferred that the content is not more than mass%. (B); solubility parameter is 8.8 to 9.5, HLB
The value is 1.0 to 6.0, and the weight average molecular weight is 5,000 to 5.
00000, a polyalkyl (meth) acrylate (C) having a crystallization onset temperature of −10 ° C. or less measured by a differential scanning calorimeter; a weight average molecular weight of 1,000 to 200,00
Ethylene-α-olefin copolymer which is 0

The monomer constituting the polyalkyl (meth) acrylate (B) is an alkyl (meth) having an alkyl group having 1 to 30 carbon atoms (excluding alicyclic or heterocyclic alcohol residues). A) acrylate. A linear or branched alkyl group is preferable.

As specific examples, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth)
Acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth)
Acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, tetradecyl (meth) acrylate, hexadecyl (meth) acrylate, octadecyl (meth) acrylate, icosyl (meth) Examples include acrylate, docosyl (meth) acrylate, tetracosyl (meth) acrylate, octakosyl (meth) acrylate, and triacontyl (meth) acrylate. Of these, an alkyl (meth) acrylate having an alkyl group having 1 to 22 carbon atoms is preferable. These may be used alone or as a copolymer.

In (B), as a constituent unit, a unit having at least one atom selected from a nitrogen atom and a sulfur atom as needed in a range of usually 10% by mass or less, preferably 5% by mass or less. One or more monomers may be contained. In this case, the viscosity index improver is preferable because it can impart clean dispersibility, antioxidant property, and the like. Examples of this include N-vinylpyrrolidone, N-vinylthiopyrrolidone, vinylpyridine,
N, N-dialkylaminoalkyl (meth) acrylate (alkyl group usually has 1 to 4 carbon atoms), N, N-dialkylaminoalkyl (meth) acrylamide (alkyl group usually has 1 to 4 carbon atoms), vinyl Imidazole,
Morpholinoalkylene (meth) acrylate, etc., aminophenothiazine, N-arylphenylenediamine, aminocarbazole, aminothiazole, aminoindole, aminopyrrole, aminoimidazoline, aminomercaptothiazole, (meth) acrylate derivative having aminopiperidine residue, etc. Is mentioned.

Of these, preferred are N-vinylpyrrolidone, N, N-dialkylaminoalkyl (meth) acrylate (the alkyl group usually has 1 to
4) N, N-dialkylaminoalkyl (meth) acrylamide (the alkyl group usually has 1 to 4 carbon atoms) and (meth) acrylate derivatives having an N-arylphenylenediamine residue.

The solubility parameter (B) is usually from 8.8 to 9.5, preferably from 8.9 to 9.3 from the viewpoint of solubility.
More preferably, it is 8.9 to 9.2. (B) HL
The B value is usually from 1.0 to 6.0, preferably from 1.5 to 6.0, particularly preferably from 2.0, from the viewpoint of demulsifying properties.
５5.5.

The weight average molecular weight of (B) is usually 5,000
From 500,000, preferably from 10,000 to 300,000, particularly preferably from 20,000 to 100,000 from the viewpoint of the thickening effect and shear stability.
The crystallization onset temperature of the differential scanning calorimeter (B) is usually -10 ° C or lower, preferably -2, from the viewpoint of low-temperature characteristics.
The temperature is 0 ° C or lower, particularly preferably -30 ° C or lower.

(C) is a copolymer of ethylene-α-olefin. Examples of the α-olefin include linear or branched α-olefins having 3 to 6 carbon atoms, such as propylene, 1-butene, n-, iso-1-pentene, n-,
iso-1-hexene. Preferably, they are propylene and 1-butene. More preferably, it is propylene. The copolymerization ratio of ethylene-α-olefin of the polymer (C) is usually (ethylene) :( α-olefin) = (30
-80): (70-20), preferably (ethylene):
(Α-olefin) = (50-80) :( 50-20). The weight average molecular weight of (C) is usually from 1,000 to 20.
It is preferably 2,000 to 150,000, particularly preferably 5,000 to 130,000, from the viewpoints of a thickening effect and shear stability.

The viscosity index improver of the present invention is usually added to the traction drive fluid in an amount of 0.05 to 30% by mass, preferably 0.5 to 25% by mass, more preferably 1 to 20% by mass.
% By mass. Within this range, the balance between the low-temperature viscosity and the high-temperature viscosity is good.

The traction drive fluid to which the viscosity index improver of the present invention is added generally comprises a naphthene ring-containing compound and is not particularly limited, but has a solubility parameter of 8.2 to 10.0, preferably 8 0.2 to 9.
7, more preferably 8.2 to 9.4. Within this range, the solubility is preferable with the viscosity index improver of the present invention.
Examples of the traction drive fluid include a single-ring-containing compound and a condensed-ring compound (for example, dimeric ethylated norbornene). Preferably, the compound is a single ring-containing compound, and examples thereof include compounds represented by the following general formulas (II) to (X).

[0045]

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In the formula (II), among R ^{1 to} R ⁸ , R ⁴ is an alkyl group having 1 to 8 carbon atoms (which may contain a naphthene ring), preferably an alkyl group having 1 to ⁴ carbon atoms, more preferably methyl. Group. R ¹ , R ² , R ³ , R ⁵ , R ⁶ , R
⁷ and R ⁸ 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, more preferably a hydrogen atom or a methyl group. It is.

Among the naphthene ring-containing hydrocarbons represented by the general formula (II), compounds having a particularly high traction coefficient include compounds represented by the following general formula (III).

[0048]

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In the formula (III), among R ^{1 to} R ⁸ , R ⁴
Is an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring), preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group. R ¹ , R ² , R ³ , R ⁵ , R
⁶ , R ⁷ and R ⁸ 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, more preferably a hydrogen atom Or a methyl group, and
At least one, preferably at least two or more, arbitrarily selected from R ¹ , R ³ , R ⁶ and R ⁸ , more preferably at least R ¹ and R ⁶ are an alkyl group having 1 to 8 carbon atoms (including a naphthene ring ), Preferably having 1 carbon atom
To 4 alkyl groups, more preferably a methyl group.

Among the naphthene ring-containing hydrocarbons represented by the general formula (II), those which are particularly preferred in that they have particularly excellent low-temperature viscosity characteristics include compounds represented by the following general formula (IV). Can be

[0051]

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In the formula (IV), R¹~ R⁸Of which R⁴But
An alkyl group having 1 to 8 carbon atoms (may contain a naphthene ring
), Preferably an alkyl group having 1 to 4 carbon atoms, more preferably
Preferably it is a methyl group. R¹, R², R³, R⁵, R
⁶, R⁷And R⁸Are each independently a hydrogen atom or carbon number
1 to 8 alkyl groups (which may contain a naphthene ring),
Preferably, a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
Is preferably a hydrogen atom or a methyl group, and
R¹, R², R³, R⁶, R⁷And R⁸Arbitrarily selected from
At least one is an alkyl group having 1 to 8 carbon atoms (na
Phthalene ring), preferably having 1 to 4 carbon atoms.
An alkyl group, more preferably a methyl group. Further
A naphthenic ring-containing hydrocarbon represented by the general formula (IV)
Among them, it has excellent low-temperature viscosity characteristics and high
In terms of showing the action coefficient, R¹~ R⁸Of which R
⁴Is an alkyl group having 1 to 8 carbon atoms (including a naphthene ring
Good), preferably an alkyl group having 1 to 4 carbon atoms, furthermore
Preferably a methyl group, R¹, R ², R³, R⁶,
R⁷And R⁸Are each independently a hydrogen atom or carbon number 1 to
8 alkyl groups (which may contain a naphthene ring), preferred
Or a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, more preferably
Preferably a hydrogen atom or a methyl group, and R¹, R
³, R⁶And R⁸At least one arbitrarily selected from
An alkyl group having 1 to 8 carbon atoms (may contain a naphthene ring
), Preferably an alkyl group having 1 to 4 carbon atoms, more preferably
More preferably, it is a methyl group.

In the formulas (II), (III) and (IV), examples of the alkyl group representing R ^{1 to} R ⁸ include a methyl group, an ethyl group, an n-propyl group, an isopropyl group and an n-butyl group. Group, isobutyl group, sec-butyl group, tert-butyl group, linear or branched pentyl group,
Linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, cyclopentylmethyl group, cyclopentylethyl group, cyclopentylpropyl group, methylcyclopentylmethyl group, ethylcyclopentylmethyl group, dimethyl Cyclopentylmethyl group, methylcyclopentylethyl group, cyclohexylmethyl group,
Examples thereof include a cyclohexylethyl group, a methylcyclohexylmethyl group, and a cycloheptylmethyl group. Among them, an alkyl group having 1 to 4 carbon atoms is preferable, and methyl is particularly preferable. When the number of carbon atoms is 9 or more, the low temperature viscosity of the fluid deteriorates, which is not preferable.

More specifically, examples of the naphthene ring-containing hydrocarbon include the following compounds. In addition,
In the compounds, A represents a methylmethylene group or a dimethylmethylene group as described below.

[0055]

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(1) Number of alkyl groups added to cyclohexane ring: 0

[0057]

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(2) Number of alkyl groups added to cyclohexane ring: 1

[0059]

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(3) Number of alkyl groups added to cyclohexane ring: 2

[0061]

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[0062]

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(4) Number of alkyl groups added to cyclohexane ring: 3

[0064]

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[0065]

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(5) Number of alkyl groups added to cyclohexane ring: 4

[0067]

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[0068]

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In that the traction coefficient is particularly high,
Among these compounds, preferred are (2-
1), (3-1), (3-2), (3-3), (3-
4), (3-11), (3-12), (3-13),
(4-6), (4-7), (4-8), (4-10),
(4-11), (4-12), (4-14), (4-1)
5), (4-16), (4-17), (4-21),
(5-10), (5-11), (5-14), (5-1)
5) Compounds represented by (5-17) and (5-18). More preferred are (3-10), (4-
2), (4-3), (4-4), (5-5) and (5-
It is a compound represented by 6). Even more preferred are (3-1), (4-5), (4-9), (4-1)
3), (5-7), (5-8), (5-9), (5-1)
2), compounds represented by (5-13) and (5-16). Still more preferred are (4-1),
Compounds represented by (5-2), (5-3) and (5-4). Most preferred are the compounds represented by (5-1).

[0070]

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In the formula (V), R ^{1 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), preferably a hydrogen atom or 1 carbon atom.
To 4 alkyl groups, more preferably a methyl group,
In addition, at least two or more arbitrarily selected from R ⁴ , R ⁵ and R ⁸ have an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring), preferably an alkyl group having 1 to 4 carbon atoms, more preferably methyl. Group.

Among the naphthene ring-containing hydrocarbons represented by the general formula (V), preferred are those represented by the following general formula (V
And the like.

[0073]

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In the formula (VI), R¹~ R¹²Respectively
Individually represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (naphthene
), Preferably a hydrogen atom or carbon number
1-4 alkyl groups, more preferably a hydrogen atom or
A tyl group, and R⁴, R ⁵And R⁸Arbitrarily selected from
At least two or more alkyl groups having 1 to 8 carbon atoms
(Which may contain a naphthene ring), preferably having 1 to 1 carbon atoms
4 is an alkyl group, more preferably a methyl group;
¹, R³, R¹⁰And R¹²Arbitrarily selected from
At least one, preferably at least two or more, more preferably
Or at least R¹And R¹⁰Is an alkyl having 1 to 8 carbon atoms
A kill group (which may contain a naphthene ring), preferably carbon
An alkyl group of Formulas 1 to 4, more preferably a methyl group.
You.

In the formulas (V) and (VI), R ^{1 to} R
Specific examples of the alkyl group representing ¹² include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, and an n-
Butyl group, isobutyl group, sec-butyl group, tert
-Butyl group, linear or branched pentyl group, linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, cyclopentylmethyl group, cyclopentylethyl group, cyclopentylpropyl Group, methylcyclopentylmethyl group, ethylcyclopentylmethyl group,
Dimethylcyclopentylmethyl group, methylcyclopentylethyl group, cyclohexylmethyl group, cyclohexylethyl group, methylcyclohexylmethyl group, cycloheptylmethyl group and the like.
To 4 alkyl groups are preferable, and a methyl group is particularly preferable. When the number of carbon atoms is 9 or more, the low temperature viscosity of the fluid deteriorates, which is not preferable.

As the naphthene ring-containing hydrocarbon represented by the formula (V), specifically, the chemical formula (1-1) shown above
A of (5-21)

[0077]

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And the like. Among these compounds, preferable ones are (2-1), (3-2), and (3--2) because the traction coefficient is particularly high.
3), (3-4), (3-11), (3-12), (3
-13), (4-6), (4-7), (4-8), (4
-10), (4-11), (4-12), (4-1)
4), (4-15), (4-16), (4-17),
(4-21), (5-10), (5-11), (5-1)
4) Compounds represented by (5-15), (5-17) and (5-18). More preferred are (3-1)
0), (4-2), (4-3), (4-4), (5-
It is a compound represented by 5) and (5-6). Even more preferred are (3-1), (4-5), (4-
9), (4-13), (5-7), (5-8), (5-
9), (5-12), (5-13) and compounds represented by (5-16). Even more preferred are (4-1), (5-2), (5-3) and (5-
It is a compound represented by 4). The most preferred is (5
-1).

[0079]

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In the formula (VII), R ¹ , R ² , R ³ ,
R ⁴ , R ⁵ and R ⁶ are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may contain a naphthene ring), preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, more preferably It is a hydrogen atom or a methyl group. Preferred examples of the naphthene ring-containing ester represented by the general formula (VII) include a compound represented by the following general formula (VIII).

[0081]

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In the formula (VIII), R ^{1 to} R ⁶ each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may contain a naphthene ring), preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. An alkyl group, more preferably a hydrogen atom or a methyl group, and at least one, preferably at least two or more, more preferably at least R ¹ and arbitrarily selected from R ¹ , R ³ , R ⁴ and R ⁶ ; R ⁴ is an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring), preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group.

In formulas (VII) and (VIII), R
Specific examples of the alkyl group representing ^{1 to} R ⁶ include a methyl group, an ethyl group, an n-propyl group, an isopropyl group,
-Butyl group, isobutyl group, sec-butyl group, ter
t-butyl group, linear or branched pentyl group, linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, cyclopentylmethyl group, cyclopentylethyl group, cyclopentyl Propyl group, methylcyclopentylmethyl group, ethylcyclopentylmethyl group, dimethylcyclopentylmethyl group, methylcyclopentylethyl group, cyclohexylmethyl group, cyclohexylethyl group, methylcyclohexylmethyl group, cycloheptylmethyl group, and the like. Alkyl groups of 1 to 4 are preferred, and a methyl group is particularly preferred. When the number of carbon atoms is 9 or more, the low temperature viscosity of the fluid deteriorates, which is not preferable.

As the naphthene ring-containing ester represented by the formula (VII), specifically, the above-mentioned chemical formulas (1-1) to
The structure of A in (5-21) is

[0085]

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And the like. Among these compounds, preferable ones are (2-1), (3-2), and (3--2) because the traction coefficient is particularly high.
3), (3-4), (3-11), (3-12), (3
-13), (4-6), (4-7), (4-8), (4
-10), (4-11), (4-12), (4-1)
4), (4-15), (4-16), (4-17),
(4-21), (5-10), (5-11), (5-1)
4) Compounds represented by (5-15), (5-17) and (5-18). More preferred are (3-1)
0), (4-2), (4-3), (4-4), (5-
It is a compound represented by 5) and (5-6). Even more preferred are (3-1), (4-5), (4-
9), (4-13), (5-7), (5-8), (5-
9), (5-12), (5-13) and compounds represented by (5-16). Even more preferred are (4-1), (5-2), (5-3) and (5-
It is a compound represented by 4). The most preferred is (5
-1).

[0087]

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In the formula (IX), R ¹ , R ² , R ³ , R ⁴ ,
R ⁵ and R ⁶ each independently represent a hydrogen atom or a carbon atom
To 8 alkyl groups (which may contain a naphthene ring), preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, more preferably a hydrogen atom or a methyl group. The general formula (I
Preferred examples of the naphthene ring-containing carbonate represented by X) include compounds represented by the following general formula (X).

[0089]

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In the formula (X), R ^{1 to} R ⁶ each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring), preferably a hydrogen atom or 1 to 6 carbon atoms.
4, more preferably a hydrogen atom or a methyl group, and at least one, preferably at least two or more, more preferably at least R arbitrarily selected from R ¹ , R ³ , R ⁴ and R ^{6. 1} and R ⁴ are an alkyl group having 1 to 8 carbon atoms (which may include a naphthene ring), preferably an alkyl group having 1 to 4 carbon atoms, and more preferably a methyl group.

In the formulas (IX) and (X), R ^{1 to} R ⁶
Specific examples of the alkyl group which represents a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a linear or branched Pentyl group, linear or branched hexyl group, linear or branched heptyl group, linear or branched octyl group, cyclopentylmethyl group, cyclopentylethyl group, cyclopentylpropyl group, methylcyclopentylmethyl group, ethylcyclopentylmethyl Group, dimethylcyclopentylmethyl group, methylcyclopentylethyl group, cyclohexylmethyl group, cyclohexylethyl group, methylcyclohexylmethyl group, cycloheptylmethyl group and the like. Among them, an alkyl group having 1 to 4 carbon atoms is preferable, and methyl is particularly preferable. Groups are preferred. When the number of carbon atoms is 9 or more, the low temperature viscosity of the fluid deteriorates, which is not preferable. As the naphthene ring-containing carbonate represented by the general formula (IX), specifically, the above chemical formula (1-
1) The structure of A in (5-21) is

[0092]

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And the like. Among these compounds, preferable ones are (2-1), (3-2), and (3--2) because the traction coefficient is particularly high.
3), (3-4), (3-11), (3-12), (3
-13), (4-6), (4-7), (4-8), (4
-10), (4-11), (4-12), (4-1)
4), (4-15), (4-16), (4-17),
(4-21), (5-10), (5-11), (5-1)
4) Compounds represented by (5-15), (5-17) and (5-18). More preferred are (3-1)
0), (4-2), (4-3), (4-4), (5-
It is a compound represented by 5) and (5-6). Even more preferred are (3-1), (4-5), (4-
9), (4-13), (5-7), (5-8), (5-
9), (5-12), (5-13) and compounds represented by (5-16). Even more preferred are (4-1), (5-2), (5-3) and (5-
It is a compound represented by 4). The most preferred is (5
-1). Note that one or more of these compounds may be used as a traction drive fluid.

The traction drive fluid of the present invention comprises:
The naphthenic ring-containing compound, mineral oil and a molecular weight of 150;
, Preferably at least one selected from synthetic oils of from 800 to 150, preferably from 150 to 500.

In the present invention, as the mineral oil, specifically, for example, a lubricating oil fraction obtained by distilling a crude oil under normal pressure and reduced pressure is subjected to solvent removal, solvent extraction, hydrocracking, and solvent removal. Oils such as paraffinic and naphthenic oils and normal paraffins, which are purified by appropriately combining refining treatments such as catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment, can be used. The kinematic viscosity of the mineral oil in the case of using the mineral oil is not particularly limited and may be any value, but the kinematic viscosity at 100 ° C. is usually 1 to 10 mm ² / s, preferably 2 to 8 mm ² / s.
It is desirable to use the one having mm ² / s.

In the present invention, the synthetic oil needs to have a molecular weight of 150 to 800, preferably 150 to 500. If the molecular weight is less than 150, the evaporation loss increases, while if it exceeds 800, the low-temperature fluidity deteriorates, which is not preferable. Although there is no particular limitation on the synthetic oil, poly-α-olefins (1-octene oligomer, 1-decene oligomer, ethylene-
Propylene oligomers and their hydrides, isobutene oligomers and their hydrides, isoparaffin, alkylbenzene, alkylnaphthalene, diesters (ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di 2-ethylhexyl sebacate, etc.) ), Polyol esters (such as trimethylolpropane caprylate, trimethylolpropaneperargonate, pentaerythritol 2-ethylhexanoate, and pentaerythritol pelargonate), polyoxyalkylene glycol, dialkyldiphenyl ether, and polyphenyl ether. Further, among synthetic oils, isobutene oligomers can be said to be preferable synthetic oils.

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, the component (D) includes, for example, 40 to 400 carbon atoms.
At least one alkyl or alkenyl group in the molecule
Examples thereof include a nitrogen-containing compound or a derivative thereof, and a modified product of an alkenyl succinimide, and one or more arbitrarily selected ones of these can be blended.

The alkyl group or the alkenyl group may be linear or branched, but preferred examples are oligomers of olefins such as propylene, 1-butene and isobutylene, and ethylene and propylene. Examples thereof include a branched alkyl group and a branched alkenyl group derived from a co-oligomer. The carbon number of this alkyl group or alkenyl group is 40 to 400, preferably 60 to 400.
350. When the carbon number of the alkyl group or the alkenyl group is less than 40, the solubility of the compound in the lubricating base oil decreases, while when the carbon number of the alkyl group or the 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 and friction characteristics, 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 having 40 to 400 in the molecule, or a derivative thereof (D-3) polyamine having at least one alkyl group or alkenyl group having 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 (XI) or (XII).

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In the above formula (XI), R ¹³ has 40 to 40 carbon atoms.
Represents an alkyl group or alkenyl group of 400, preferably 60 to 350, and b represents an integer of 1 to 5, preferably 2 to 4.

[0102]

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In the above formula (XII), R ¹⁴ and R
¹⁵ individually represents an alkyl group or an 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 a so-called mono-type succinimide such as the formula (XI) and a so-called bis-type succinimide such as the formula (XII) in which succinic anhydride is added to both ends of a polyamine. As the components, any of them and mixtures thereof can be used. As the above (D-2) benzylamine, more specifically,
Examples include compounds represented by the following formula (XIII).

[0105]

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In the formula (XIII), R ¹⁶ represents an alkyl group or an alkenyl group having 40 to 400 carbon atoms, preferably 60 to 350 carbon atoms, and d represents 1 to 5, preferably 2 to 4
Are shown as integers. The method for producing this benzylamine is not limited at all. For example, a propylene oligomer, polybutene, a polyolefin such as an ethylene-α-olefin copolymer is reacted with phenol to form an alkylphenol, and then formaldehyde and diethylenetriamine are added thereto. And a polyamine such as triethylenetetramine, tetraethylenepentamine and pentaethylenehexamine by reacting the polyamine with a Mannich reaction. More specifically, examples of the polyamine (D-3) include a compound represented by the following formula (XIV).

[0107]

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In the above formula (XIV), R ¹⁷ is a group having 4 carbon atoms.
It represents an alkyl or alkenyl group of 0 to 400, preferably 60 to 350, 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.

Examples of the derivative of the nitrogen-containing compound mentioned as an example of the component (D) include, specifically, the above-mentioned nitrogen-containing compound and a monocarboxylic acid having 2 to 30 carbon atoms (such as a fatty acid). Or oxalic acid, phthalic acid, trimellitic acid, by reacting a polycarboxylic acid having 2 to 30 carbon atoms such as pyromellitic acid to neutralize a part or all of the remaining amino group and / or imino group, Amidated, so-called acid-modified compounds; so-called boron, in which boric acid acts on the above-mentioned nitrogen-containing compound to neutralize or amidate some or all of the remaining amino groups and / or imino groups A modified compound; a sulfur-modified compound obtained by reacting a sulfur compound with a nitrogen-containing compound as described above; and two or more types of modifications selected from acid modification, boron modification, and sulfur modification to the nitrogen-containing compound described above. Modified compound saw combined; and the like.

When the component (D) is contained in the traction drive fluid of the present invention, the content thereof is not particularly limited, but is usually 0.01 to 10.0% by mass based on the total amount of the traction drive fluid. Is preferably, and more preferably 0.1 to 7.0% by mass.
When the content of the component (D) is less than 0.01% by mass, there is no effect on cleanliness. On the other hand, when 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, (E) the phosphorus-based additive includes zinc alkyldithiophosphate, phosphoric acid, phosphorous acid, phosphoric acid monoesters, phosphoric acid diesters, phosphoric acid triesters, and phosphorous acid monoester. , Phosphite diesters, phosphite triesters, salts of (phosphite) phosphites, and mixtures thereof.

Of the components (E) listed above, phosphoric acid,
Those excluding phosphorous acid are usually compounds having a hydrocarbon group having 2 to 30, preferably 3 to 20 carbon atoms. As the hydrocarbon group having 2 to 30 carbon atoms, specifically,
Ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group,
Alkyl groups such as undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, and octadecyl group (the alkyl groups may be linear or branched); butenyl group, pentenyl group, hexenyl Alkenyl groups such as a group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, an undecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, a heptadecenyl group, and an octadecenyl group; It may be branched, and the position of the double bond is 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, a dimethylcyclopentyl group, a methylethylcyclo Pliers Group, diethyl cyclopentyl group,
Methylcyclohexyl group, dimethylcyclohexyl group,
An alkylcycloalkyl group having 6 to 11 carbon atoms such as a methylethylcyclohexyl group, a diethylcyclohexyl group, a methylcycloheptyl group, a dimethylcycloheptyl group, a methylethylcycloheptyl group, and a diethylcycloheptyl group (for converting an alkyl group into a cycloalkyl group) The substitution position is also arbitrary.); Aryl groups such as phenyl group and naphthyl group:
Tolyl, xylyl, ethylphenyl, propylphenyl, butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonylphenyl, decylphenyl, undecylphenyl, dodecylphenyl 7-1 such as carbon number
8 each alkylaryl group (the alkyl group may be linear or branched, and the substitution position of the aryl group is arbitrary); benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl Arylalkyl groups each having 7 to 12 carbon atoms, such as a phenylhexyl group or a phenylhexyl group (the alkyl groups may be linear 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 alkyldithiophosphate such as zinc and zinc dioctyldithiophosphate (the alkyl group may be linear or branched); monopropyl phosphate, monobutyl phosphate, monopentyl phosphate, monohexyl phosphate, monoheptyl phosphate, monooctyl phosphate Monoalkyl phosphates such as monophenyl phosphate, monocresyl phosphate, etc .; 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) aryl phosphates such as diphenyl phosphate and dicresyl phosphate Esters; trialkyl phosphates such as tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, triheptyl phosphate, and trioctyl phosphate (the alkyl group may be linear or branched); triphenyl phosphate; Tri (alkyl) aryl phosphates such as tricresyl phosphate; monopropyl phosphite, monobutyl phosphite, monopentyl phosphite, Phosphorous monoalkyl esters such as silphosphite, monoheptyl phosphite and monooctyl phosphite (the alkyl group may be linear or branched); phosphorus phosphites such as monophenyl phosphite and monocresyl phosphite Acid mono (alkyl) aryl esters; dipropyl phosphite,
Dialkyl phosphites such as dibutyl phosphite, dipentyl phosphite, dihexyl phosphite, diheptyl phosphite, dioctyl phosphite (the alkyl group may be linear or branched); diphenyl phosphite, dicresyl phosphite Phosphite di (alkyl) aryl esters such as tripropyl phosphite, tributyl phosphite, tripentyl phosphite, trihexyl phosphite, triheptyl phosphite, trioctyl phosphite and the like; The group 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 having 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.

As the nitrogen-containing compound, specifically,
Ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, diethylamine, methylpropylamine, ethylpropylamine, dipropylamine Alkylamines such as methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine and dioctylamine (the alkyl group may be linear or branched); monomethanolamine, monoethanol 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.

One or more of these components (E) can be arbitrarily compounded. Further, as the component (E), (F-2) at least one alkyl group or alkenyl group having 6 to 30 carbon atoms described below is contained in the molecule, and no hydrocarbon group having 31 or more carbon atoms is contained in the molecule. When using a compound contained in the phosphorus compound or a derivative thereof, for the traction drive fluid of the present invention,
In addition to the wear resistance as described above, it is possible to simultaneously provide optimized friction characteristics in a wet clutch.

When the component (E) is contained in the traction drive fluid of the present invention, the content thereof is not particularly limited, but is usually 0.005 to 0.2 mass% as a phosphorus element based on the total amount of the traction drive fluid. %. When the content of phosphorus is less than 0.005% by mass, there is no effect on the wear resistance, and the content is 0.2% by mass.
When the ratio exceeds, the oxidation stability is deteriorated, so that each is not preferable.

Further, the traction drive fluid of the present invention preferably contains (F) a friction modifier. This friction modifier has at least one alkyl group or alkenyl group having 6 to 30 carbon atoms in the molecule, and has 31 carbon atoms.
It does not have the above-mentioned hydrocarbon group in the molecule, and a traction drive fluid having optimized friction characteristics can be obtained by blending the friction modifier (F).

(F) The alkyl group or alkenyl group of the friction modifier may be linear or branched, but is preferably a compound having 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.

Examples of the alkyl group or alkenyl group include hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl,
Tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, icosyl group, henycosyl group, docosyl group, tricosyl group, tetracosyl group, pentacosyl group, hexacosyl group, heptacosyl group, octakosyl group, nonacosyl group , An alkyl group such as a tricontyl group (these alkyl groups 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, and the position of the double bond Is also optional); and the like. Further, it is not preferable to have 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. 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. (F-3) At least one alkyl group or alkenyl group having 6 to 30 carbon atoms in the molecule and 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 the formula (F-1) is, for example, an aliphatic monoamine represented by the following formula (XV) or an alkylene oxide adduct thereof, or a compound represented by the following formula (XVI). Examples thereof include an aliphatic polyamine represented by the formula, and an imidazoline compound represented by the formula (XVII).

[0124]

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In the above formula (XV), R ¹⁸ has 6 to 6 carbon atoms.
30, preferably 9 to 24 alkyl or alkenyl groups, R ¹⁹ and R ²⁰ each independently represent an ethylene group or a propylene group, and R ²¹ and R ²² represent
Each independently represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, f and g each independently represent 0 to 10, and f + g = 0 to 10; preferably each represents 0 to 6; In addition, an integer of f + g = 0 to 10 is shown.

[0126]

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In the above formula (XVI), R ²³ has 6 to 6 carbon atoms.
30, preferably an alkyl or alkenyl group of 9 to ^{24, R 24} represents an ethylene or propylene ^{group, R 2 5} and ^{R 26} are each independently a hydrogen atom or a hydrocarbon of 1 to 30 carbon atoms H represents 1 to 5,
Preferably, an integer of 1 to 4 is shown.

[0128]

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In the formula (XVII), R ²⁷ represents an alkyl group or alkenyl group having 6 to 30 carbon atoms, preferably 9 to 24 carbon atoms, R ²⁸ represents an ethylene group or a propylene group, and R ²⁹ represents It represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and i represents an integer of 0 to 10, preferably 0 to 6.

The alkyl group or alkenyl group represented by R ¹⁸ , R ²³ and R ²⁷ may be linear or branched, and has 6 to 30, preferably 9 to 2 carbon atoms.
4 is 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. R ¹⁸ ,
Specific examples of the alkyl group or alkenyl group represented by R ²³ and R ²⁷ include the various alkyl groups and alkenyl groups described above. , A myristyl group, a palmityl group, a stearyl group, an isostearyl group, an oleyl group and the like, and an alkyl or alkenyl group having 12 to 18 carbon atoms is particularly preferable.

Examples of the group represented by R ²¹ , R ²² , R ²⁵ , R ²⁶ and R ²⁹ include a hydrogen atom; a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group and a hexyl group. , Heptyl group, octyl group, nonyl group,
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 (cycloalkyl of an alkyl group) Aryl group such as phenyl group, naphthyl group, etc .: tolyl group, xylyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptylphenyl Groups, octylphenyl groups, nonylphenyl groups, decylphenyl groups, undecylphenyl groups, dodecylphenyl groups, and other alkylaryl groups having 7 to 18 carbon atoms (these alkyl groups may be linear or branched; Substitution on aryl group The position is also arbitrary); each arylalkyl group having 7 to 12 carbon atoms such as benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl group, phenylhexyl group, etc. May be branched); and the like.

As the aliphatic monoamine represented by the formula (XV) or the alkylene oxide adduct thereof, R ²¹ and R ²² in the formula (XV) are each individually , A hydrogen atom or an alkyl group having 1 to 6 carbon atoms, an aliphatic monoamine wherein f = g = 0, and R ²¹ and R ²² are hydrogen atoms, and f and g are each independently 0 to 0 An alkylene oxide adduct of an aliphatic monoamine, which is an integer satisfying f + g = 1 to 6 in 6, is more preferably used.

As the aliphatic polyamine represented by the above formula (XVI), R ²⁵ and R ²⁷ in the formula (XVI) are superior in terms of the friction characteristics of a wet clutch.
However, an aliphatic polyamine which is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms or the like is more preferably used. The imidazoline compound represented by the formula (XVII) is preferably an imidazoline compound represented by the formula (XVII), wherein R ²⁹ is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, since the friction characteristics of the wet clutch are more excellent. And the like are more preferably used.

On the other hand, specific examples of the derivative of the amine compound represented by (F-1) include, for example, those represented by the formulas (XV) to (XV).
Monocarboxylic acids having 2 to 30 carbon atoms (fatty acids, etc.), oxalic acid, phthalic acid,
By reacting a polycarboxylic acid having 2 to 30 carbon atoms such as trimellitic acid and pyromellitic acid, the remaining amino group and / or
Or a so-called acid-modified compound in which a part or all of an imino group is neutralized or amidated; formulas (XV) to (XVII)
So-called boric acid-modified compounds in which boric acid acts on an amine compound such as above to neutralize part or all of the remaining amino group and / or imino group; formulas (XV) to (XVI)
An amine compound such as I) has 1 to 1 carbon atoms in its molecule.
It has 1 to 2 hydrocarbon groups of 30 and does not contain a hydrocarbon group of 31 or more carbon atoms, and is left by the action of an acidic phosphoric acid ester or an acidic phosphite having at least one hydroxyl group. A phosphoric acid ester salt obtained by neutralizing a part or all of an amino group and / or an imino group; reacting an amine compound such as formula (XVI) or (XVII) with an alkylene oxide such as ethylene oxide or propylene oxide; So-called alkylene oxide adducts of amine compounds; modified products of amine compounds obtained by combining two or more modifications selected from these; 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 wet clutches.
Amine compounds such as lauryldiethanolamine, dodecyldipropanolamine, 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.

As the phosphorus compound of the above (F-2), more specifically, for example, a phosphoric acid ester represented by the following formula (XVIII) and a phosphite ester represented by the following formula (XIX) And the like.

[0137]

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In the above formula (XVIII), R ³⁰ represents an alkyl group or an alkenyl group having 6 to 30, preferably 9 to 24 carbon atoms, and R ³¹ and R ³² each independently represent a hydrogen atom or a carbon atom. Represents 1 to 30 hydrocarbon groups,
F ¹ , F ² , F ³ and F ⁴ are each independently an oxygen atom or a sulfur atom, and F ¹ , F ² , F ³ and F 4
⁴ represents a group in which at least one is an oxygen atom.

[0139]

Embedded image

In the above formula (XIX), R ³³ has 6 carbon atoms.
30, preferably an alkyl or alkenyl group of 9 to ^{24, R 34} and ^{R 35} are each independently represents 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, and at least one of F ⁵ , F ⁶ and F ⁷ represents a group which is an oxygen atom.

The alkyl group or alkenyl group for R ³⁰ and R ³³ may be linear or branched, but 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 the above-mentioned various alkyl groups and alkenyl groups. Of these, lauryl group, myristyl group, A straight-chain alkyl or alkenyl group having 12 to 18 carbon atoms such as a group, palmityl group, stearyl group, oleyl group and the like is particularly preferred.

Examples of the groups represented by R ³¹ , R ³² , R ³⁴ and R ³⁵ are each independently a hydrogen atom; a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group , Heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl,
Icosyl group, henycosyl group, docosyl group, tricosyl group, tetracosyl group, pentacosyl group, hexacosyl group, heptacosyl group, octakosyl group, nonacosyl group,
Alkyl groups such as triacontyl group (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, icosenyl group, henicocenyl group, docosenyl group, tricosenyl group, tetracosenyl group, pentacosenyl group, hexacosenyl group, hepcocosenyl group, octacosenyl group, octacosenyl group, octacosenyl group And alkenyl groups such as triacontenyl groups (these alkenyl groups may be linear or branched, and the position of the double bond is arbitrary); C 5 carbon atoms such as a cyclopentyl group, a cyclohexyl group and a cycloheptyl group; To 7 cycloalkyl groups; methylcyclopentyl group, dimethylcyclopentyl group, methylethylcyclopentyl group, diethylcyclopentyl group, methylcyclohexyl group, dimethylcyclohexyl group, methylethylcyclyl C6-C11 alkylcycloalkyl groups such as hexyl group, diethylcyclohexyl group, methylcycloheptyl group, dimethylcycloheptyl group, methylethylcycloheptyl group, diethylcycloheptyl group (substitution of these alkyl groups with cycloalkyl groups) The position is also arbitrary); aryl groups such as phenyl group and naphthyl group: tolyl group, xylyl group, ethylphenyl group,
Each alkyl having 7 to 18 carbon atoms such as a propylphenyl group, a butylphenyl group, a pentylphenyl group, a hexylphenyl group, a heptylphenyl group, an octylphenyl group, a nonylphenyl group, a decylphenyl group, an undecylphenyl group, and a dodecylphenyl group. Aryl group (these alkyl groups may be linear or branched, and the position of substitution on the aryl group is arbitrary); benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl group, phenyl group Each arylalkyl group having 7 to 12 carbon atoms such as a hexyl group (the alkyl group may be linear or branched); and the like.

As the phosphorus compound (F-2), the above formula (XVI) is preferred because of its superiority in the friction characteristics of a wet clutch.
In II), an acidic phosphate ester in which at least one of R ³¹ and R ³² is a hydrogen atom;
In X), an acidic phosphite in which at least one of R ³⁴ and R ³⁵ is a hydrogen atom is more preferably used.

Examples of the derivative of the phosphorus compound represented by (F-2) include the acidic phosphoric acid ester wherein at least one of R ³¹ and R ³² in the above formula (XVIII) is a hydrogen atom, In the formula (XIX), R
^An acidic phosphite in which at least one of ³⁴ and R ³⁵ is a hydrogen atom is mixed with ammonia or a nitrogen-containing compound such as an amine compound having only a hydrocarbon group having 1 to 8 carbon atoms or a hydroxyl group-containing hydrocarbon group in a molecule. Examples of such salts include salts obtained by neutralizing some or all of the remaining acidic hydrogen.

Specific examples of the nitrogen-containing compound include:
Ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, diethylamine, methylpropylamine, ethylpropylamine, dipropylamine Alkylamines such as methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine and dioctylamine (the alkyl group may be linear or branched); monomethanolamine, monoethanol 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) and derivatives thereof 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, and 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 linear 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 the 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.

As the fatty acids, specifically, for example,
Heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid,
Saturation of pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, icosanoic acid, henicosanoic acid, docosanoic acid, tricosanoic acid, tetracosanoic acid, pentacosanoic acid, hexacosanoic acid, heptacosanoic acid, octacosanoic acid, nonacosanoic acid, triacontyl group, etc. Fatty acids (these saturated fatty acids may be straight-chain or branched); heptenoic, octenoic, nonenoic, decenoic,
Undecenoic acid, dodecenoic acid, tridecenoic acid, tetradecenoic acid, pentadecenoic acid, hexadecenoic acid, heptadecenoic acid, octadecenoic acid, nonadecenoic acid, eicosenoic acid, henicicosenic acid, docosenoic acid, tricosenoic acid, tetracosenic acid, pentacosenoic acid, hexacosenic acid, heptacosenoic acid And unsaturated fatty acids such as octacosenoic acid, nonacosenoic acid and triaconthenic acid (these unsaturated fatty acids may be linear or branched, and the position of the double bond is also arbitrary); and the like. Synthesized by straight-chain fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, straight-chain fatty acids derived from various fats and oils (coconut oil fatty acids, etc.), and oxo method, because of their superior frictional properties of wet clutches A mixture of a straight-chain fatty acid and a branched fatty acid to be used is preferably used.

The fatty acid amide referred to in (F-3) includes
Specifically, for example, the fatty acid or its acid chloride is obtained by reacting ammonia or a nitrogen-containing compound such as an amine compound having only a hydrocarbon group having 1 to 8 carbon atoms or a hydroxyl group-containing hydrocarbon group in a molecule. Amides and the like.

As the nitrogen-containing compound, specifically,
Ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, diethylamine, methylpropylamine, ethylpropylamine, dipropylamine Alkylamines such as methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine and dioctylamine (the alkyl group may be linear or branched); monomethanolamine, monoethanol 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.

As the fatty acid amide (F-3), specifically, from the viewpoint of being superior in the 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 These mixtures and the like are particularly preferably used.

On the other hand, examples of the fatty acid metal salt referred to in (F-3) include the alkaline earth metal salts (magnesium salt, calcium salt, etc.) and zinc salt of the above fatty acids. 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 components (F) arbitrarily selected may be added in any amount as long as other components such as oxidation stability are not affected. 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 exceeding this limit in order to increase the durability of the friction characteristics, an additive ((H)
Component). 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 having a hydrocarbon group having 60 or less carbon atoms (for example, a succinimide or amide compound having an alkyl group or an alkenyl group having 6 to 60, preferably 6 to 30 carbon atoms) ) Or derivatives thereof (eg, modified products with boric acid, phosphoric acid, carboxylic acid, sulfur compounds, etc.).

In the traction drive fluid of the present invention, when the component (F) and the component (H) are used in combination, (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, while 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 this (G) metal-based detergent, the friction characteristics of the wet clutch can be optimized, and a decrease in strength against repeated compression can be suppressed. (G) As the metal-based detergent, a basic metal-based detergent having a total base number of 20 to 450 mgKOH / g, preferably 50 to 400 mgKOH / g is desirable. In addition, the total base number mentioned here is JIS
K2501 "Petroleum products and lubricants-Neutralization number test method" 7. Means the total base number measured by the perchloric acid method in accordance with Total base number of metallic detergent is 20mg KO
If it is less than H / 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, for example, (G-1) an alkaline earth metal sulfonate having a total base number of 20 to 450 mgKOH / g, and (G-2) an alkaline earth metal sulfonate having a total base number of 20 to 450 mgKOH / 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.

The (G-1) alkaline earth metal sulfonate mentioned here is more specifically, 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 used are those obtained by sulfonating an alkyl aromatic compound of a lubricating oil fraction of a mineral oil, so-called mahoganic acid which is a by-product of white oil production. 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.

The (G-2) alkaline earth metal phenate mentioned here is more specifically a compound having 4 to 4 carbon atoms.
Alkylphenol having at least one, preferably 6 to 18, 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.

Also, alkaline earth metal sulfonates,
Alkaline earth metal phenates and alkaline earth metal salicylates have metal salts of 20 to 450 mg KOH /
g, alkyl aromatic sulfonic acid, alkyl phenol, alkyl phenol sulfide, Mannich reaction product of alkyl phenol,
Alkyl salicylic acid or the like is directly reacted with an alkaline earth metal base such as an alkaline earth metal oxide or hydroxide of magnesium and / or calcium, or once as an alkali metal salt such as a sodium salt or a potassium salt. Not only neutral salts (normal salts) obtained by substituting with alkaline earth metal salts, but also these neutral salts (normal salts)
And excess alkaline earth metal salts and alkaline earth metal bases (hydroxides and oxides of alkaline earth metals) in the presence of water, in the presence of basic salts or carbon dioxide gas Overbased salt (ultrabasic salt) obtained by reacting a neutral salt (normal salt) with an alkaline earth metal base
Is also included.

These reactions are usually carried out in a solvent (aliphatic hydrocarbon solvent such as hexane, aromatic hydrocarbon solvent such as xylene, light lubricating base oil, etc.). 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% by mass. , Preferably 2.0 to 16% by mass.

When 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 the reduction in strength of the wet clutch against repeated compression is insufficient, while when it exceeds 5.0% by mass, the oxidation of the composition is Each of them is not preferable because the stability is lowered.

Note that (D), (E), (F) and (G)
By containing the components, the traction drive fluid of the present invention has abrasion resistance, oxidative stability and cleanliness required for a hydraulic control mechanism and a friction characteristic for a wet clutch required for a friction mechanism of a wet clutch, and a wet type. It is possible to increase the strength of the clutch against repeated compression, etc., but these properties are further improved, and 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, an extreme pressure additive, a corrosion inhibitor, a rubber swelling agent, an antifoaming agent, a coloring agent, or the like may be further contained singly or in combination of several kinds.

As the antioxidant, any phenolic compounds, amine compounds and the like generally used in lubricating oils 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. Any one selected from these
The kind or two or more kinds of compounds can be contained in an arbitrary amount. Usually, however, the content is desirably 0.01 to 5.0% by mass based on the total amount of the traction drive fluid.

Examples of extreme pressure additives include sulfur compounds such as disulfides, sulfurized olefins, and sulfurized 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 to 0. 0 based on the total amount of the traction drive fluid. It is desirably 0.05% by mass. The coloring agent can contain any amount,
Usually, its content is desirably 0.001 to 1.0% by mass based on the total amount of the traction drive fluid.

[0170]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. In Examples and Comparative Examples,% and parts represent mass% and parts by weight. (Measurement method of weight average molecular weight by GPC) Apparatus: HLC-802A manufactured by Toyo Soda Column: 2 pieces of TSK gel GMH6 Measurement temperature: 40 ° C. Sample solution: 0.5% by mass THF solution Solution injection amount: 200 μl Detector: Refraction Rate detector Standard: Polystyrene

(Test Method for Low Temperature Viscosity) JPI-5S-2
The viscosity at -30 ° C was measured by the method of 6-99. (Test method of kinematic viscosity) 10 according to the method of JIS K2283
The viscosity at 0 ° C. was measured. (Test method for shear stability) Ultrasonic method of JPI-5S-29-88 (Measurement method of traction coefficient) Measurement was performed using a 4-roller traction coefficient tester. The test conditions were a peripheral speed of 3.1
4m / s, oil temperature 100 ℃, maximum hertz pressure 1.49GP
a, The slip ratio is 2%.

The meanings of the abbreviations of the raw materials used in the examples are as follows. AN; acrylonitrile HEMA; hydroxyethyl methacrylate C1MA; methyl methacrylate C8AA; decyl acrylate C12MA; dodecyl methacrylate C16MA; hexadecyl methacrylate

(Synthesis Example of Polymer) Synthesis Example 1 A reactor equipped with a stirrer, a heating device, a thermometer, and a nitrogen blowing tube was charged with 100 g of toluene, and a nitrogen atmosphere was prepared.
4 ° C. The reactor was stirred while the monomer (AN: 10
0 g, C8AA: 900 g) and 2,
A total of 3.0 g of 2'-azobis-2 ', 4-dimethylvaleronitrile and 4.5 g of dodecylmercaptan were charged into the reactor at an equal rate over 4 hours, and a polymerization reaction was carried out at 80 ° C. for 4 hours after the completion of the charging. Was performed. After the reaction was completed, toluene was removed under reduced pressure at 130 ° C. to obtain a polymer 1.

Synthesis Example 2 The monomer of Synthesis Example 1 was prepared by using HEMA: 100 g, C8AA: 9
Polymer 2 was obtained in the same manner except that the amount was changed to 00 g.

Synthesis Example 3 The monomer of Synthesis Example 1 was prepared using AN: 200 g, C8AA: 800
Polymer 3 was obtained in the same manner except that g was changed.

Synthesis Example 4 The monomers of Synthesis Example 1 were C12MA: 900 g, C1MA:
Polymer 4 was obtained in the same manner except that the amount was changed to 100 g.

Synthesis Example 5 The monomer of Synthesis Example 1 was prepared by using C16MA: 800 g, C12M
A: Polymer 5 was obtained in the same manner except that the amount was changed to 200 g.

[0178]

[Table 1]

Example 1 Polymer 1 was used as a viscosity index improver (component B) in a traction drive fluid (component A; R ¹ , R ^{4 in} formula (X) = methyl group, R ² , R ³ , R ⁵ , R ⁶ = H; solubility parameter: 8.95, traction coefficient: 0.092), and the amount of the viscosity index improver was adjusted so that the kinematic viscosity at 100 ° C. became 5.0 mm ² / s. The shear stability and the low temperature viscosity (−30 ° C.) were measured.

Example 2 A fluid 2 was prepared and tested in the same manner as in Example 1 except that Polymer 2 was used as a viscosity index improver.

Example 3 A fluid 3 was prepared and tested in the same manner as in Example 1 except that the polymer 3 was used as a viscosity index improver.

Example 4 A fluid 4 was prepared and tested in the same manner as in Example 1 except that Polymer 3 and Polymer 4 were used in a viscosity index improver in a weight ratio of 80:20.

Example 5 Polymer 3 and an ethylene / propylene copolymer (UNIROYAL CHEMICAL COMPA) were used as viscosity index improvers.
NY, INC. , TRILENE CP-40, weight average molecular weight = 16,000, solubility parameter: 8.2, H
LB value: 0, crystallization start temperature: -40 ° C. or less)
A fluid 5 was prepared and tested in the same manner as in Example 1 except that the weight 5 was used.

Comparative Example 1 A fluid 6 was prepared and tested in the same manner as in Example 1 except that the polymer 4 was used as a viscosity index improver.

Comparative Example 2 A fluid 7 was prepared and tested in the same manner as in Example 1 except that Polymer 5 was used as a viscosity index improver.

Comparative Example 3 Ethylene / propylene copolymer (UN
IROYAL CHEMICAL COMPANY, I
NC. , TRILENE CP-40), except that fluid 8 was prepared and tested in the same manner as in Example 1.

[0187]

[Table 2]

Table 3 shows the traction drive fluid (A component), the viscosity index improver (B component), the ashless dispersant (D component), and the phosphorus-based additive (E component) in Example 1. (Fluid 9-1)
5). The fluids 9 to 15 thus adjusted were each evaluated for wear resistance and oxidation stability. Table 3 shows the results. The abrasion resistance was measured according to ASTM D226.
80, 1800 rpm, 294N (30
kgf), a Shell four-ball test was conducted under the conditions of 60 minutes,
Evaluation was made based on the wear scar diameter of the steel ball after the test. The oxidation stability was evaluated by performing an oxidation test at 150 ° C. for 96 hours in accordance with the lubricating oil acid value stability test of JIS K2514.

[0189]

[Table 3]

The terms in Table 3 are as follows. (1) Traction drive fluid (traction coefficient:
(0.092, solubility parameter: 8.95) (2) Viscosity index improver: Polymer 1 (3) Ashless dispersant A: Alkenyl succinimide (bis type, alkenyl group carbon number average 220) (4) Ashless content Powder B: Boronated alkenyl succinimide (monotype, average carbon number of alkenyl group 260) (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, the abrasion resistance and oxidative stability required for the traction drive fluid are reduced. It becomes possible to provide cleanliness.

The above traction drive fluid, (D)
Ashless dispersant, (E) phosphorus additive, (F) friction modifier,
(G) Additives such as metal-based detergents were blended in proportions as shown in each example of Table 4 to prepare fluids (fluids 16 to 22).
A low-speed slip test was performed on each of the adjusted fluids 16 to 22, and the fluid 1 and the fluid 9 using a slip tester under the following conditions, and the dependency of the friction coefficient on the slip speed (μ (1 rpm) / μ) (50 rpm): When this value exceeds 1, a positive gradient is used, and when this value is less than 1, a negative gradient is used.) Table 4 shows the results.

[Low-speed slip test] (1) Test conditions: in accordance with JASO M349-95 (Test method for preventing oil shudder in automatic transmission) (2) Oil amount: 0.2 liter (3) Oil temperature: 80 ° C (4) ) Surface pressure: 0.98MPa

[0194]

[Table 4]

The terms in Table 4 refer to the following compounds. (1) Traction drive fluid: same as traction drive fluid in Table 3 (2) Viscosity index improver: same as viscosity index improver in Table 3 (3) Ashless dispersant A: Same as ashless dispersant A in Table 3 ( 4) Ashless dispersant B: same as ashless dispersant B in Table 3 (5) Phosphorus additive A: Same as phosphorous additive A in Table 3 (6) Antioxidant A: Antioxidant A in Table 3 (7) Friction modifier A: ethoxylated oleylamine (8) Friction modifier B: oleylamine (9) Mg sulfonate A: petroleum, total base number (perchloric acid method) 300 mgKOH / g, Mg content 9. mass% (10) Ca sulfonate A: 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 a friction modifier and / or a metal-based detergent imparts optimized friction characteristics in a wet clutch such as a transmission clutch or a slip lock-up clutch. Becomes possible.

[0197]

As is apparent from the above examples, the traction drive fluid using the viscosity index improver of the present invention has a good balance between high-temperature viscosity and low-temperature viscosity.
Also, it has good oxidation stability and shear stability. In addition, ashless dispersants, phosphorus additives, friction modifiers, and metal detergents are added to provide abrasion resistance, oxidation stability, and cleanliness. Machine can be used. Further, since the viscosity index improver of the present invention has the above characteristics, it is also extremely useful as a viscosity number improver for lubricating oils (eg, engine oil, gear oil, ATF, shock absorber oil) other than traction drive fluids. Is

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C10M 129/32 C10M 129/32 129/40 129/40 133/06 133/06 133/16 133/16 133 / 44 133/44 133/54 133/54 133/56 133/56 137/02 137/02 137/04 137/04 137/08 137/08 137/10 137/10 A 143/00 143/00 145 / 16 145/16 145/26 145/26 147/04 147/04 149/02 149/02 151/02 151/02 153/02 153/02 159/22 159/22 159/24 159/24 // C10N 10 : 04 C10N 10:04 20:00 20:00 AZ 20:04 20:04 30:02 30:02 30:04 30:04 30:06 30:06 30:10 30:10 40:04 40:04 40:08 40:08 40:25 40:25 (72) Inventor Yoshihisa Ota 11-11, Hitotsubashi Nohonmachi, Higashiyama-ku, Kyoto-shi, Kyoto Inside Sanyo Chemical Industry Co., Ltd. (72) Inventor Toru Matsuoka Naka-ku, Yokohama-shi, Kanagawa 8 Chidoricho Nishiishi Mitsui Co., Ltd. Lubricants Department Lubricants Laboratory (72) Inventor Tetsuo Okawa 1-312 Nishi-Shimbashi, Minato-ku, Tokyo Nishiishi Mitsubishi Co., Ltd. Lubricating oil department F-term (reference) 4H104 AA20C BA02A BA08C BB15C BB33A BB37A BE02C BE11C BE29C BF01C BF03C BH02C BH03C BH07C CA03C CA04C CA05C04 CB08 CE03C03C CE04C CE05C CG01C CH01C DB06C DB07C EA01A EA01C EA03C EA04C EA22C EB07 EB08 FA02 LA01 LA02 LA03 LA05 PA02 PA03 PA05 PA41

Claims (8)

[Claims] 1. The solubility parameter exceeds 9.5.
0 or less, a vinyl polymer (A) having an HLB value of 1.0 to 6.0, a weight average molecular weight of 5,000 to 500,000, and a crystallization onset temperature of -10 ° C or less measured by a differential scanning calorimeter. A viscosity index improver for traction drive fluids, which contains as an essential component. 2. The viscosity index improver according to claim 1, wherein the vinyl polymer (A) contains an alkyl (meth) acrylate as an essential constituent unit. 3. The viscosity index improver according to claim 2, wherein the content of the alkyl (meth) acrylate in the vinyl polymer (A) is 50 to 100% by mass. 4. The composition according to claim 1, further comprising the following (B) and / or the following (C) in an amount not exceeding 50% by mass.
The viscosity index improver according to any one of the above. (B); solubility parameter is 8.8 to 9.5, HLB
The value is 1.0 to 6.0, and the weight average molecular weight is 5,000 to 5.
00000, a polyalkyl (meth) acrylate (C) having a crystallization onset temperature of −10 ° C. or less measured by a differential scanning calorimeter; a weight average molecular weight of 1,000 to 200,00
Ethylene-α-olefin copolymer which is 0 5. A lubricating oil composition comprising a traction drive fluid having a solubility parameter of 8.2 to 10.0 and a viscosity index improver according to any one of claims 1 to 4, wherein said viscosity index improver is provided. The lubricating oil composition has an amount of 0.05 to 30% by mass based on the traction drive fluid. 6. The lubricating oil composition according to claim 5, wherein the traction drive fluid further contains an ashless dispersant (D) and a phosphorus-based additive (E). 7. The traction drive fluid further comprises:
A friction modifier (F) having at least one alkyl group or alkenyl group having 6 to 30 carbon atoms in the molecule and having no hydrocarbon group having 31 or more carbon atoms in the molecule. The lubricating oil composition according to claim 5. 8. The traction drive fluid further comprises:
The lubricating oil composition according to any one of claims 5 to 7, comprising a metallic detergent (G) having a total base number of 20 to 450 mgKOH / g.