JP2003073683A - Lubricating oil composition for automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating oil composition for an automatic transmission which prevents a scratching phenomenon when used in a metallic belt type infinitely variable transmission and can prevent the scratching phenomenon over a long period of time. SOLUTION: The lubricating oil composition for the automatic transmission has a mass ratio of phosphorus : calcium : boron : sulfur of 1:(0.1-2):(0.06-2):(0.2-20) obtained by the elemental analysis to the total amount of the composition. A phosphorus concentration, based on the total amount of the composition, is of 0. 01-0.06 mass%, a sulfur concentration derived from the base oil of 0-0.1 mass% and a sulfur concentration derived from a sulfur based additive of 0.01-0.15 mass%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil composition for an automatic transmission, and more specifically, when it is applied to a belt type CVT of an automobile, a μ-V characteristic can be made a positive gradient to prevent generation of scratch noise. The present invention also relates to a lubricating oil composition for an automatic transmission, which can be advantageously used in a belt type CVT that can maintain the μ-V characteristic in a positive gradient for a long period of time.

[0002]

2. Description of the Related Art At present, automatic transmissions for automobiles are widely adopted which are composed of a torque converter with a lockup clutch, a speed change section in which a wet clutch and a planetary gear are combined, and a hydraulic control section. Therefore, there are drawbacks such as poor fuel efficiency and discomfort due to shift shock. In order to make up for this drawback, a continuously variable transmission (belt type C
VT) has been put to practical use.

The belt type CVT is composed of a driving pulley, a driven pulley and a belt for transmitting power, and the belt is composed of an element (hereinafter referred to as a top) and a belt (steel strip) for holding the element. ing. As the lubricating oil used for such a belt type CVT, cooling property,
ATF (Automatic T), which has been conventionally filled in a stepped automatic transmission (AT), has lubricity and wear resistance, and has many commonalities with the materials constituting the transmission.
The transmission fluid has been widely used. However, in recent years, it has been known that, in an automobile using a belt CVT, a phenomenon of generating a noise (scratch noise) peculiar to, for example, entering a garage or starting a vehicle, that is, a so-called scratch phenomenon occurs in a certain type of vehicle. .

This scratch phenomenon is caused by rattling noise of the gear after the CVT, and it has already been found that the cause is uneven rotation of the driven pulley. Furthermore, it has been found that the rotational unevenness occurs when the friction coefficient (μ) between the belt and the top has a negative gradient with respect to the change in the sliding speed (V) (for example, Japanese Patent Laid-Open No. 9-263782). Issue). Conventionally belt type CVT
The ATF that has been filled in is not always good in the μ-V characteristic, and the fluctuation of the μ-V characteristic is large when it is used for a long period of time, so scratch noise cannot be completely prevented. The phenomenon was easy to occur.

[0005]

In order to completely prevent such a scratch phenomenon in ATF, it is necessary to develop an ATF blending technique in which the μ-V characteristic always has a positive slope. Furthermore, it is desired that such required performance satisfies not only new oil but also lubricating oil after running for a certain period of time, and that such performance is maintained for a long time. It has been found that the lubricating oil after running for a certain period of time undergoes oxidative deterioration, and the above-mentioned μ-V characteristic is likely to deteriorate, especially when the lubricating oil contains a relatively large amount of sulfur.

Accordingly, the object of the present invention is to provide a belt type CVT.
The present invention provides a lubricating oil composition for an automatic transmission, which is suitable for a belt-type CVT, which can prevent the scratch phenomenon by making the μ-V characteristic of the above-mentioned positive gradient and can keep the μ-V characteristic at the positive gradient for a long period of time. Especially.

[0007]

As a result of intensive studies for solving the above-mentioned problems, the present inventor has found that a composition in which a specific additive is blended so as to have a specific element ratio can solve the above-mentioned problems. Heading The present invention has been completed.

In the present invention, the elemental analysis value based on the total amount of the composition is such that the elemental ratio of phosphorus: calcium: boron: sulfur is 1: (0.1-2) :( 0.06-
2): (0.2 to 20), the phosphorus element concentration in the total amount of the composition is 0.010 to 0.06% by mass, and the sulfur concentration derived from the base oil is 0 to 0.1% by mass. , And the sulfur concentration derived from the sulfur-based additive is 0.01 to
The lubricating oil composition for an automatic transmission is characterized in that it is 0.15% by mass.

The lubricating oil composition of the present invention is an elemental analysis value based on the total amount of the composition, and the element ratio of phosphorus: calcium: boron: sulfur is 1: (0.1-1): mass ratio.
(0.1 to 0.8): (0.4 to 5), and the phosphorus element concentration is 0.02 to 0.05 based on the total amount of the composition.
% By mass, and the sulfur concentration derived from the base oil is 0 to 0.1.
%, And the sulfur concentration derived from the sulfur-based additive is preferably 0.01 to 0.15% by mass.

The sulfur-based additive contained in the lubricating oil composition of the present invention includes (A) thiadiazole and / or benzothiazole, (B) dithiocarbamate, (C) dithiophosphate, (D) trithiophosphite, and ( E)
It is preferably at least one compound selected from polysulfides and derivatives of (A) to (E).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A lubricating oil composition for an automatic transmission according to the present invention comprises a lubricating base oil containing elements of phosphorus, calcium, boron and sulfur. Among them, sulfur is derived from a base oil in the composition, or an additive, for example, a sulfur-based additive and / or a calcium detergent of calcium sulfonate or calcium phenate, and other elements are, for example, Phosphorus element is a phosphorus-based additive and some sulfur-based additives, calcium element is a calcium-based detergent, and boron element is boric acid-modified succinimide and / or alkali metal borate or its hydrate additive. It comes from each. Hereinafter, these components will be described in order. (1) Base oil As the lubricant base oil in the lubricating oil composition for an automatic transmission of the present invention, any mineral oil and / or synthetic oil used as a base oil for ordinary lubricating oils can be used.

As the mineral oil, for example, a lubricating oil fraction obtained by distilling crude oil under atmospheric pressure and vacuum distillation is used for solvent degassing, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing. Examples thereof include paraffin-based and naphthene-based oils and normal paraffins, which have been purified by hydrorefining, sulfuric acid washing, and refining treatment such as clay treatment alone or in combination as appropriate.

The synthetic oil is not particularly limited,
Poly-α-olefin (for example, 1-octene oligomer, 1-decene oligomer, ethylene-propylene oligomer, etc.) or its hydride, isobutene oligomer or its hydride, isoparaffin, alkylbenzene, alkylnaphthalene, diester (for example, ditridecylgluta Rate, di2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di2-ethylhexyl sebacate, etc., polyol ester (for example, trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 2-ethylhexanoate). , And pentaerythritol pelargonate), polyoxyalkylene glycol, dialkyl diphenyl ether, and polyphenyl ether. Mention may be made of the ether and the like.

The kinematic viscosity of the lubricating base oil is not particularly limited, but the kinematic viscosity at 100 ° C. is preferably 1 to 10 mm ² / s, more preferably ² to 8 mm ² / s.
Is.

The sulfur concentration in the lubricating oil derived from the base oil is 0.1% by mass or less, preferably 0.05% by mass or less, and more preferably 0.005% by mass or less. When the sulfur concentration exceeds 0.1% by mass, it becomes difficult to maintain stable μ-V characteristics for a long time. (2) Sulfur-based additive As the sulfur-based additive that can be used in the present invention,
The compound shown by the following (A)-(E) can be mentioned. Specific examples of the (A) thiadiazole and / or benzothiazole thiadiazole include compounds represented by the following general formula (1).

[0016]

[Chemical 1]

In the general formula (1), R ¹ has 1 carbon atom.
To 30, preferably 6 to 24, linear or branched alkyl group, R ² is a hydrogen atom or a carbon number of 1 to
30 linear or branched alkyl groups, preferably a hydrogen atom or a linear or branched alkyl group having 1 to 24 carbon atoms, wherein a and b are each independently 1, 2
Or 3 is shown, and preferably 1 or 2.

As benzothiazole, specifically,
The compound etc. which are represented by the following general formula (2) are mentioned.

[0019]

[Chemical 2]

In the general formula (2), R ³ has a carbon number of 1 to 1.
4 represents a straight-chain or branched alkyl group, preferably a methyl group or an ethyl group, and R ⁴ represents a straight-chain or branched alkyl group having 1 to 30 carbon atoms, preferably 6 to 24 carbon atoms. , C represents an integer of 0 to 3, preferably 0 or 1, and d represents an integer of 1 to 3, preferably 1 or 2.

When the component (A) is contained, one kind of compound selected from the compounds represented by the above general formulas (1) and (2) may be used alone, and two or more kinds having different structures are used. You may use together the compound of. (B) Dithiocarbamate As the dithiocarbamate, any dithiocarbamate can be used, and preferred examples include the compounds represented by the following general formula (3) or general formula (4).

[0022]

[Chemical 3]

In the general formula (3), R ⁵ , R ⁶ ,
R ⁷ , R ⁸ , R ⁹ and R ¹⁰ are each independently a carbon number of 1 to
30, preferably 1 to 20 hydrocarbon groups, and X is
Indicates, - S (sulfur atom) or a methylene group (-CH ₂₎
And e shows the integer of 0-6.

1 to 30 carbon atoms represented by R ^{5 to} R ¹⁰
As the hydrocarbon group of, for example, an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an alkenyl group,
An aryl group, an alkylaryl group, and an arylalkyl group can be mentioned.

Specific examples of the above-mentioned alkyl group include methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group,
Decyl group, undecyl group, dodecyl group, tridecyl group,
Examples thereof include alkyl groups such as tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group (these alkyl groups may be linear or branched).

Specific examples of the cycloalkyl group include cycloalkyl groups having 5 to 7 carbon atoms such as cyclopentyl group, cyclohexyl group and cycloheptyl group.

As the above alkylcycloalkyl group,
Specifically, methylcyclopentyl group, dimethylcyclopentyl group, methylethylcyclopentyl group, diethylcyclopentyl group, methylcyclohexyl group, dimethylcyclohexyl group, methylethylcyclohexyl group, diethylcyclohexyl group, methylcycloheptyl group, dimethylcycloheptyl group, methyl Examples thereof include an alkylcycloalkyl group having 6 to 11 carbon atoms such as an ethylcycloheptyl group and a diethylcycloheptyl group (the position of substitution of the alkyl group with the cycloalkyl group is arbitrary).

Specific examples of the above alkenyl group include:
Alkenyl groups such as butenyl, pentenyl, hexenyl, heptenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl (such as The alkenyl group may be linear or branched, and the position of the double bond is arbitrary).

Specific examples of the aryl group include aryl groups such as a phenyl group and a naphthyl group.

Specific examples of the alkylaryl group include tolyl group, xylyl group, ethylphenyl group, propylphenyl group, butylphenyl group, pentylphenyl group, hexylphenyl group, heptylphenyl group, octylphenyl group and nonyl group. Phenyl group, decylphenyl group,
Examples thereof include an alkylaryl group having 7 to 18 carbon atoms such as an undecylphenyl group and a dodecylphenyl group (the alkyl group may be linear or branched, and the position of substitution with the aryl group is arbitrary). .

Specific examples of the above-mentioned arylalkyl group include arylalkyl groups having 7 to 12 carbon atoms such as benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl group and phenylhexyl group (these are included). The alkyl group may be linear or branched).

These (B) components are of one type or of two types.
It is possible to arbitrarily mix more than one kind. Examples of the dithiophosphate (C) dithiophosphate include one kind of dialkyldithiophosphoric acid or a mixture of two or more kinds of dialkyldithiophosphoric acid selected from the compounds represented by the following general formula (5).

[0033]

[Chemical 4]

In the general formula (5), R ¹¹ and R
¹² has 2 to 30 carbon atoms, preferably 3
~ 20 hydrocarbon groups. Examples of the hydrocarbon group of 2 to 30 represented by R ¹¹ and R ¹² include the same ones as the examples of the hydrocarbon group represented by R ^{5 to} R ⁸ in the general formula (3). . (D) Trithiophosphite Examples of the trithiophosphite include trithiophosphite compounds containing a hydrocarbon group having 2 to 30 carbon atoms, preferably 3 to 20 carbon atoms. Examples of the hydrocarbon group of 2 to 30 include R ⁵ to R ⁵ in the general formula (3).
The same examples as the hydrocarbon group represented by R ⁸ can be given. (E) Polysulfide Polysulfide is a sulfur-based compound generally called dihydrocarbyl polysulfide or sulfurized olefin,
Specifically, it is represented by the following general formula (6).

R ¹³ —S _f —R ¹⁴ (6) In the general formula (6), R ¹³ and R ¹⁴ are each independently a linear or branched alkyl group having 3 to 20 carbon atoms,
An aryl group having 6 to 20 carbon atoms, an alkylaryl group having 6 to 20 carbon atoms or an arylalkyl group having 6 to 20 carbon atoms is shown, and f is an integer of 2 to 6, preferably 2 to 5.

Specific examples of the alkyl group represented by R ¹³ and R ¹⁴ include n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group,
tert-butyl group, straight-chain or branched pentyl group, straight-chain or branched hexyl group, straight-chain or branched heptyl group, straight-chain or branched octyl group, straight-chain or branched nonyl group, straight-chain or branched Decyl group, straight chain or branched undecyl group, straight chain or branched dodecyl group, straight chain or branched tridecyl group, straight chain or branched tetradecyl group, straight chain or branched pentadecyl group, straight chain or branched hexadecyl group , A straight-chain or branched heptadecyl group, a straight-chain or branched octadecyl group, a straight-chain or branched nonadecyl group, a straight-chain or branched icosyl group.

Specific examples of the aryl group represented by R ¹³ and R ¹⁴ include a phenyl group and a naphthyl group.

Specific examples of the alkylaryl group represented by R ¹³ and R ¹⁴ include a tolyl group (including all structural isomers), an ethylphenyl group (including all structural isomers) and a direct group. Chain or branched propylphenyl group (including all structural isomers), linear or branched butylphenyl group (including all structural isomers), linear or branched pentylphenyl group (including all structural isomers) ), Linear or branched hexylphenyl group (including all structural isomers), linear or branched heptylphenyl group (including all structural isomers), linear or branched octylphenyl group (all Structural isomers), straight-chain or branched nonylphenyl groups (including all structural isomers), straight-chain or branched decylphenyl groups (including all structural isomers), straight-chain or branched undecyl Phenyl group (all structural isomers Included), linear or branched dodecylphenyl group (including all structural isomers), xylyl group (including all structural isomers), ethylmethylphenyl group (including all structural isomers), diethylphenyl group (Including all structural isomers), di (linear or branched) propylphenyl group (including all structural isomers), di (linear or branched) butylphenyl group (including all structural isomers) ), Methylnaphthyl group (including all structural isomers), ethylnaphthyl group (including all structural isomers), linear or branched propylnaphthyl group (including all structural isomers), linear or branched A branched butylnaphthyl group (including all structural isomers),
Dimethylnaphthyl group (including all structural isomers), ethylmethylnaphthyl group (including all structural isomers), diethylnaphthyl group (including all structural isomers), di (linear or branched) propylnaphthyl group Group (including all structural isomers), di (linear or branched) butylnaphthyl group (including all structural isomers), and the like.

Specific examples of the arylalkyl group represented by R ¹³ and R ¹⁴ include a benzyl group, a phenylethyl group (including all isomers), and a phenylpropyl group (including all isomers). And so on.

R ¹³ and R ¹⁴ are each an alkyl group having 3 to 18 carbon atoms, an aryl group having 6 to 8 carbon atoms, and an alkylaryl group having 7 to 8 carbon atoms, which are derived from propylene, 1-butene or isobutylene. , Or carbon number 7 ~
It is preferably an arylalkyl group of 8.

Specifically, examples of the alkyl group include an isopropyl group, a branched hexyl group derived from a propylene dimer (including all branched isomers), and a propylene trimer. Branched nonyl group (including all branched isomers), branched dodecyl group derived from propylene tetramer (including all branched isomers), derived from propylene pentamer Branched pentadecyl group (including all branched isomers), branched octadecyl group derived from propylene hexamer (including all branched isomers), sec-butyl group, tert -Butyl group, 1
-A branched octyl group derived from butene dimer (including all branched isomers), a branched octyl group derived from isobutylene dimer (including all branched isomers) , A branched dodecyl group derived from a 1-butene trimer (including all branched isomers), a branched dodecyl group derived from an isobutylene trimer (including all branched isomers) ), A branched hexadecyl group derived from 1-butene tetramer (including all branched isomers), a branched hexadecyl group derived from isobutylene tetramer (all branched isomers) (Including the body). Examples of the aryl group include a phenyl group. Examples of the alkylaryl group include a tolyl group (including all structural isomers), an ethylphenyl group (including all structural isomers), a xylyl group (including all structural isomers), and the like. . Examples of the arylalkyl group include a benzyl group and a phenethyl group (including all isomers).

The lubricating oil composition of the present invention includes the above (A) to
Among the sulfur-based additives represented by (E), one of the compounds may be used alone, or two or more of them may be used in appropriate combination. In the present invention, the content of the sulfur-based additive is such that the concentration of the sulfur element derived from the compounds represented by (A) to (E) and the sulfur element derived from the other additives are the lubricating oil. 0.01 to 0.15 mass% based on the total amount of the composition, and (A) to
The phosphorus element concentration of the phosphorus element derived from the compound represented by (E) and the phosphorus element of the phosphorus-based additive is in the range of 0.01% by mass to 0.06% by mass based on the total amount of the lubricating oil composition. It is preferable that the amount is When the content of the sulfur-based additive is less than 0.01% by mass as the sulfur element or less than 0.01% by mass as the phosphorus element, there is no effect on the improvement of the μ-V characteristic and 0.15% by mass as the sulfur element. %, Or when it exceeds 0.06 mass% as a phosphorus element, the oxidation stability deteriorates, which is not preferable.

In order to obtain even better μ-V characteristics, the content of the sulfur-based additive is the sulfur element derived from the compounds represented by (A) to (E) on the basis of the total amount of the lubricating oil composition, and The sulfur concentration including the sulfur element derived from other additives is 0.01 to 0.15 based on the total amount of the lubricating oil composition.
The phosphorus element concentration of the phosphorus element derived from the compounds represented by (A) to (E) in mass% and the phosphorus element of the phosphorus-based additive is 0.02 to 0 based on the total amount of the lubricating oil composition. ．
The amount is preferably in the range of 05% by mass. (3) (F) Phosphorus-based additive Examples of the (F) phosphorous-based additive that can be used in the present invention include phosphoric acid monoesters, phosphoric acid diesters, phosphoric acid triesters, and phosphorous monoester. Esters,
Phosphite diesters, phosphite triesters,
Examples thereof include salts of (sub) phosphoric acid esters, phosphoric acid, phosphorous acid, zinc alkyldithiophosphate, and mixtures thereof. Of the above-mentioned component (F), those excluding phosphoric acid and phosphorous acid are compounds containing a hydrocarbon group generally having 2 to 30 carbon atoms, preferably 3 to 20 carbon atoms.

Examples of the hydrocarbon group having 2 to 30 carbon atoms include an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an alkenyl group, an aryl group, an alkylaryl group and an arylalkyl group.

Specific examples of the alkyl group include ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, Examples thereof include alkyl groups such as tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group and octadecyl group (these alkyl groups may be linear or branched).

Specific examples of the cycloalkyl group include cycloalkyl groups having 5 to 7 carbon atoms such as cyclopentyl group, cyclohexyl group and cycloheptyl group.

As the above alkylcycloalkyl group,
Specifically, methylcyclopentyl group, dimethylcyclopentyl group, methylethylcyclopentyl group, diethylcyclopentyl group, methylcyclohexyl group, dimethylcyclohexyl group, methylethylcyclohexyl group, diethylcyclohexyl group, methylcycloheptyl group, dimethylcycloheptyl group, methyl Examples thereof include an alkylcycloalkyl group having 6 to 11 carbon atoms such as an ethylcycloheptyl group and a diethylcycloheptyl group (the position of substitution of the alkyl group with the cycloalkyl group is arbitrary).

Specific examples of the above alkenyl group include:
Alkenyl groups such as butenyl, pentenyl, hexenyl, heptenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl (such as The alkenyl group may be linear or branched, and the position of the double bond is arbitrary).

Specific examples of the aryl group include aryl groups having 6 to 18 carbon atoms such as phenyl group and naphthyl group.

Specific examples of the alkylaryl group include a tolyl group, a xylyl group, an ethylphenyl group, a propylphenyl group, a butylphenyl group, a pentylphenyl group, a hexylphenyl group, a heptylphenyl group, an octylphenyl group and a nonyl group. Phenyl group, decylphenyl group,
Examples thereof include an alkylaryl group having 7 to 18 carbon atoms such as an undecylphenyl group and a dodecylphenyl group (the alkyl group may be linear or branched, and the position of substitution with the aryl group is arbitrary). .

Specific examples of the above arylalkyl group include arylalkyl groups having 7 to 12 carbon atoms such as benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl group, phenylhexyl group The alkyl group may be linear or branched) and the like.

Preferred examples of the component (F) include phosphoric acid; phosphorous acid; zinc dipropyldithiophosphate, zinc dibutyldithiophosphate, zinc dipentyldithiophosphate, zinc dihexyldithiophosphate, diheptyldithiophosphate. Zinc, zinc dioctyldithiophosphate such as zinc dioctyldithiophosphate (the alkyl group may be linear or branched); monopropyl phosphate, monobutyl phosphate, monopentyl phosphate, monohexyl phosphate, monopeptyl phosphate, monooctyl Phosphoric acid monoalkyl ester such as phosphate (the alkyl group may be linear or branched); monophenyl phosphate, monocresyl phosphate or other phosphoric acid mono (alkyl) aryl ester; dipropyl phosphate, dibutyl phosphate Eto, dipentyl phosphate,
Phosphoric acid dialkyl esters such as dihexyl phosphate, dipeptyl phosphate and dioctyl phosphate (alkyl groups may be linear or branched); Diphenyl alkyl phosphate esters such as diphenyl phosphate, dicresyl phosphate; tripropyl Trialkyl phosphates such as phosphates, tributyl phosphates, tripentyl phosphates, trihexyl phosphates, tripeptyl phosphates, trioctyl phosphates (alkyl groups may be linear or branched); triphenyl phosphates, tricresyl Phosphoric acid tri (alkyl) aryl ester such as phosphate;
Monopropyl phosphite, monobutyl phosphite,
Monoalkyl phosphites such as monopentyl phosphite, monohexyl phosphite, monopeptyl phosphite, monooctyl phosphite (the alkyl group may be linear or branched); monophenyl phosphite, monocle Phosphorous acid mono (alkyl) aryl ester such as dilphosphite; Dialkylphosphite dialkyl ester (alkyl The group may be linear or branched); di (alkyl) aryl phosphite such as diphenyl phosphite, dicresyl phosphite; tripropyl phosphite, tributyl phosphite, tripentyl phosphite, trihexyl phosphite Phosphite trialkyl esters such as nickel, tripeptyl phosphite and trioctyl phosphite (alkyl groups may be linear or branched); phosphite such as triphenyl phosphite and tricresyl phosphite Examples thereof include tri (alkyl) aryl ester; and mixtures thereof.

As the salts of the above-mentioned (phosphite) s, specifically, phosphoric acid monoester, phosphoric acid diester, phosphorous acid monoester, phosphorous acid diester, etc. Examples thereof include salts obtained by reacting a nitrogen compound such as an amine compound containing only 1 to 8 hydrocarbon groups or hydroxyl group-containing hydrocarbon groups in the molecule to neutralize a part or all of the remaining acidic hydrogen.

Specific examples of the nitrogen compound include ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine and methylethylamine. ,
Alkylamines such as diethylamine, methylpropylamine, ethylpropylamine, dipropylamine, methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, and dioctylamine Or may be branched); monomethanolamine, monoethanolamine, monopropanolamine, monobutanolamine, monopentanolamine, monohexanolamine, monoheptanolamine, monooctanolamine, monononanolamine,
Dimethanolamine, methanolethanolamine, diethanolamine, methanol propanolamine, ethanolpropanolamine, dipropanolamine,
Methanol butanol amine, ethanol butanol amine, propanol butanol amine, dibutanol amine, dipentanol amine, dihexanol amine,
Examples thereof include alkanolamines such as diheptanolamine and dioctanolamine (alkanol groups may be linear or branched); and mixtures thereof.

When the lubricating oil composition for an automatic transmission of the present invention contains the component (F), the content thereof is (F).
The total phosphorus element concentration of the elemental phosphorus derived from the components and the elemental phosphorus derived from other additives is 0.01 to 0.06 mass% based on the total amount of the composition. If the phosphorus element concentration is less than 0.01% by mass, there is no effect on wear resistance, while if the concentration exceeds 0.06% by mass, oxidative stability deteriorates. Each is not preferable. In order to obtain further improved μ-V characteristics, the content of the (F) component is such that the total phosphorus element concentration of the phosphorus element derived from the (F) component and the phosphorus element derived from other additives is The amount is preferably 0.02 to 0.05 mass% based on the total amount of the composition. (4) (G) Calcium-based detergent The total base number of the (G) calcium-based detergent that can be used in the present invention is usually 20 to 450 mgKOH / g,
A basic calcium detergent of 50 to 400 mg KOH / g is preferable. Here, the total base number is JIS K2.
501, "Petroleum Products and Lubricants-Neutralization Value Test Method". Means the total base number measured by the perchloric acid method in accordance with

Specific examples of the component (G) include, for example, one kind or two or more kinds of calcium detergents selected from the following. (G-1) Calcium sulfonate having a total base number of 20 to 450 mgKOH / g (G-2) Calcium phenate having a total base number of 20 to 450 mgKOH / g (G-3) having a total base number of 20 to 450 mgKOH / g More specifically, the calcium salicylate (G-1) calcium sulfonate has, for example, a molecular weight of 100 to 1500, preferably 2
A calcium salt of an alkylaromatic sulfonic acid obtained by sulfonation of an alkylaromatic compound of 00 to 700 is preferably used. Specific examples of the alkylaromatic sulfonic acid include so-called petroleum sulfonic acid and synthetic sulfonic acid. Is mentioned.

As the petroleum sulfonic acid, generally used is one obtained by sulfonation of an alkyl aromatic compound of a lubricating oil fraction of mineral oil, so-called mahogany acid produced as a by-product during the production of white oil, and the like. Further, as the synthetic sulfonic acid, for example, by-produced from an alkylbenzene production plant which is a raw material of a detergent or obtained by alkylating a polyolefin into benzene, an alkylbenzene having a linear or branched alkyl group 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.

More specifically, (G-2) calcium phenate has 4 to 30 carbon atoms, preferably 6 to 30 carbon atoms.
Alkylphenol having at least one linear or branched alkyl group of 18, alkylphenol sulfide obtained by reacting this alkylphenol with sulfur, or Mannich reaction production of alkylphenol obtained by reacting this alkylphenol with formaldehyde The calcium salt of the product is preferably used.

More specifically, (G-3) calcium salicylate has 4 to 30 carbon atoms, preferably 6 to 30 carbon atoms.
A calcium salt of alkylsalicylic acid having at least one linear or branched alkyl group of 18 is preferably used.

The above-mentioned calcium sulfonates, calcium phenates and calcium salicylates, as long as their metal salts are in the range of 20 to 450 mgKOH / g, the Mannich reaction products of alkylaromatic sulfonic acids, alkylphenols, alkylphenol sulfides and alkylphenols. , Or an alkylsalicylic acid or the like, directly reacted with calcium oxide or calcium hydroxide, or a neutral salt obtained by substituting an alkali metal salt such as a sodium salt or potassium salt with a calcium salt (a normal salt). ) As well as calcium salts obtained by heating these neutral salts (normal salts) and excess calcium salts or calcium hydroxide or calcium oxide in the presence of water, or in the presence of carbon dioxide gas. Natural salt Obtained by reacting a basic calcium salt overbased calcium salts (overbased salts)
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).

The metal-based detergent is usually commercially available in the state of being diluted with a light lubricating base oil or the like, and is available, but the metal content is generally 1.0 to 20% by mass. , Preferably 2.0 to 16% by mass.

When the component (G) is contained in the lubricating oil composition for automatic transmission of the present invention, the content thereof is not particularly limited, but is 0.01 to 5.0 mass% based on the total amount of the composition. It is preferably present, and more preferably 0.05 to 4.0% by mass. When the content of the component (H) is less than 0.01% by mass, the effect of suppressing the strength reduction due to repeated compression of the wet clutch tends to be insufficient, while when it exceeds 5.0% by mass, the composition is oxidized. Stability tends to decrease. (5) (H) Boric acid-modified succinimide As the (H) boric acid-modified succinimide that can be used in the present invention, for example, at least one alkyl group or alkenyl group having 40 to 400 carbon atoms is included in the molecule. Examples thereof include alkenyl succinimides modified with boric acid, and one or two selected from these can be arbitrarily selected.
It is possible to mix more than one kind.

The carbon number of the above alkyl group or alkenyl group is 40 to 400, preferably 60 to 350. When the alkyl group or alkenyl group has less than 40 carbon atoms, the solubility of the compound in the lubricating base oil decreases, while when the alkyl group or alkenyl group has more than 400 carbon atoms, the composition has low temperature fluidity. Are worse, which is not preferable.

The succinimide used in the present invention includes
More specifically, compounds represented by the following formula (7) or (8) can be exemplified.

[0065]

[Chemical 5]

In the general formula (7), R ²¹ has 40 carbon atoms.
To 400, preferably 60 to 350, or an alkenyl group, and m represents an integer of 1 to 5, preferably 2 to 4.

[0067]

[Chemical 6]

In the general formula (8), R ²² and R ²³ are
Each has 40 to 400 carbon atoms, preferably 60 carbon atoms
~ 350 alkyl or alkenyl groups, and n is 0
It shows the integer of-4, Preferably it is 1, 2 or 3.

The above-mentioned succinimide is a so-called monotype succinimide represented by formula (7) in which succinic anhydride is added to one end of polyamine, and formula (8) in which succinic anhydride is added to both ends of polyamine. There is a so-called bis-type succinimide represented by the formula (3), and any of them or a mixture thereof can be used as the component (H). The boric acid modified succinimide is a so-called boric acid modified by reacting boric acid on the succinimide to neutralize some or all of the remaining amino groups and / or imino groups, or amidated. A compound.

When the component (H) is contained in the lubricating oil composition for automatic transmission of the present invention, the content is usually 0.01 to 10.0% by mass, preferably the total amount of the composition. , 0.1 to 7.0 mass%. Is preferred. When the content of the component (H) is less than 0.01% by mass, a sufficient cleaning effect cannot be obtained, while when it exceeds 10.0% by mass, the low temperature fluidity of the composition is significantly increased. It is easy to get worse. (6) (I) Alkali metal borate or hydrate thereof As the alkali metal borate or hydrate thereof as the component (I) that can be used in the present invention, for example, lithium borate hydrate, Examples thereof include sodium borate hydrate, potassium borate hydrate, rubidium borate hydrate, and cesium borate hydrate. Particularly preferred is potassium borate hydrate.

These alkali metal borates are, for example, hydroxylated so that the atomic ratio of boric acid and alkali metal (potassium / sodium) is in the range of 2.0 to 4.5 (boron / alkali metal). Dissolving potassium or sodium hydroxide and boric acid in water, adding this solution to an oil solution containing a neutral alkaline earth metal sulfonate or succinimide ashless dispersant, and stirring vigorously to give a water-in-oil emulsion. Is prepared and dehydrated to obtain a fine particle dispersion of potassium borate hydrate or sodium borate hydrate.

In the lubricating oil composition for a metal belt type continuously variable transmission of the present invention, the compounding ratio of one kind or two or more kinds of component (I) arbitrarily selected is arbitrary, but the total amount of the lubricating oil composition is Based on the standard, the amount of boron element is preferably 0.002
It is at least mass%, more preferably at least 0.005 mass%. On the other hand, the amount of elemental boron based on the total amount of the lubricating oil composition is preferably 0.1% by mass or less, more preferably 0.06% by mass or less. The content of the component (I) is 0.0 as a boron element amount based on the total amount of the lubricating oil composition.
If the amount is less than 02% by mass, the effect of improving the intermetallic friction characteristics of the lubricating oil composition by the component (A) blending is poor, and the content thereof is 0. 0 as a boron element amount based on the total amount of the lubricating oil composition. When it exceeds 1% by mass, the storage stability of the lubricating oil composition tends to be lowered. (7) Other Additives Various known additives are added to the lubricating oil composition for an automatic transmission of the present invention in order to further enhance the scratch prevention performance and to maintain or improve the performance as other lubricating oils. Agents can be used in combination. Examples of such an additive include an ashless dispersant, a metal-based detergent other than the component (G), a friction modifier, an antioxidant, a viscosity index improver, an antifoaming agent, and a corrosion inhibitor. You can (J) Ashless dispersant As the ashless dispersant that can be used in combination with the lubricating oil composition for an automatic transmission of the present invention, any compound that is usually used as an ashless dispersant for lubricating oil can be used. Number 4
Examples thereof include nitrogen compounds having at least one alkyl group or alkenyl group of 0 to 400 in the molecule (for example, compounds having an amino group and / or an imino group) or derivatives thereof, and modified products of alkenyl succinimide.

The above-mentioned alkyl group or alkenyl group may be linear or branched, but preferred examples are specifically olefin oligomers such as propylene, 1-butene and isobutylene, and ethylene and propylene. Examples thereof include branched alkyl groups and branched alkenyl groups derived from cooligomers. The alkyl group or alkenyl group has 40 to 400 carbon atoms, preferably 60 to 35 carbon atoms.
It is 0. The number of carbon atoms in the alkyl or alkenyl group is 40
If it is less than 4, the solubility of the compound in the lubricating base oil decreases, while the alkyl group or alkenyl group has 40 carbon atoms.
When it exceeds 0, the low temperature fluidity of the composition is deteriorated, which is not preferable.

As the derivative of the above nitrogen compound,
Specifically, for example, a nitrogen compound is allowed to act with a C2-C30 monocarboxylic acid (fatty acid or the like) or a C2-C30 polycarboxylic acid such as oxalic acid, phthalic acid, trimellitic acid, or pyromellitic acid. A part of or all of the remaining amino groups and / or imino groups are neutralized or amidated, a so-called acid-modified compound, a sulfur-modified compound obtained by reacting a sulfur compound with the nitrogen compound, and the nitrogen compound Examples thereof include modified compounds in which two or more kinds of modifications selected from acid modification and sulfur modification are combined.

In the present invention, one kind or two or more kinds of compounds arbitrarily selected from the above ashless dispersants can be contained in an arbitrary amount, but the content is usually the lubricating oil composition. The total amount is 0.1 to 10% by mass. (K) Metallic detergent (G) that can be used in combination with the lubricating oil composition for an automatic transmission of the present invention
As the metal-based detergent other than the components, any compound usually used as a metal-based detergent for lubricating oil can be used, and examples thereof include alkali metal or alkaline earth metal sulfonates, phenates, salicylates, and naphthenates. Can be mentioned. In the composition of the present invention, these compounds can be used alone or in combination of two or more kinds. Sodium and potassium as alkali metals,
Examples of the alkaline earth metal include magnesium. Specifically, the metal-based detergent used in the present invention is preferably magnesium sulfonate, phenate, or salicylate. The total base number and addition amount of these metallic detergents can be arbitrarily selected according to the required performance of the lubricating oil.

In the present invention, one kind or two or more kinds of compounds arbitrarily selected from the above metallic detergents can be contained in an arbitrary amount, but the content is usually the lubricating oil composition. It is 0.01 to 5 mass% based on the total amount of the product. (L) Friction Modifier As the friction modifier that can be used in combination with the lubricating oil composition for an automatic transmission of the present invention, any compound that is commonly used as a friction modifier for lubricating oil can be used, but the carbon number is 6-30
And an alkyl group or an alkenyl group, particularly an amine compound, a fatty acid ester, a fatty acid amide, a fatty acid metal salt or the like having at least one linear alkyl group or linear alkenyl group having 6 to 30 carbon atoms in the molecule.

Examples of the amine compound include those having 6 carbon atoms.
-30 linear or branched, preferably linear aliphatic monoamines, linear or branched, preferably linear aliphatic polyamines, or alkylene oxide adducts of these aliphatic amines Etc. can be illustrated. Examples of the fatty acid ester include esters of a linear or branched, preferably linear fatty acid having 7 to 31 carbon atoms with an aliphatic monohydric alcohol or an aliphatic polyhydric alcohol. The fatty acid amide has, for example, 7 to 31 carbon atoms.
Examples thereof include amides of a linear or branched, preferably linear fatty acid with an aliphatic monoamine or an aliphatic polyamine. As the fatty acid metal salt, for example, a carbon number of 7 to
Examples thereof include alkaline earth metal salts (magnesium salt, calcium salt, etc.), zinc salt, etc. of 31 linear or branched, preferably linear fatty acids.

In the present invention, one kind or two or more kinds of compounds arbitrarily selected from these friction modifiers can be contained in an arbitrary amount, but the content is usually the lubricating oil composition. It is 0.01 to 5.0% by mass, preferably 0.03 to 3.0% by mass, based on the total amount of the substances. (M) Antioxidant As the antioxidant that can be used together with the lubricating oil composition for an automatic transmission of the present invention, any antioxidant that is commonly used in lubricating oils such as phenol compounds and amine compounds can be used. It can be used.

Specifically, alkylphenols such as 2-6-di-tert-butyl-4-methylphenol;
Methylene-4,4-bisphenol (2,6-di-te
bis-phenols such as rt-butyl-4-methylphenol); naphthylamines such as phenyl-α-naphthylamine; dialkyldiphenylamines; zinc dialkyldithiophosphates such as zinc di-2-ethylhexyldithiophosphate; -Tert-butyl-4-hydroxyphenyl) fatty acid (propionic acid, etc.) and a monohydric or polyhydric alcohol such as methanol, octadecanol, 1,6 hexadiol, neopentyl glycol,
Thiodiethylene glycol, triethylene glycol,
Examples thereof include esters with pentaerythritol and the like.

In the present invention, one kind or two or more kinds of compounds arbitrarily selected from the above antioxidants can be contained in an arbitrary amount, but the content is usually the lubricating oil composition. The total amount is 0.01 to 5.0% by mass. (N) Viscosity Index Improver As the viscosity index improver that can be used in combination with the lubricating oil composition for an automatic transmission of the present invention, specifically, one or more monomers selected from various methacrylic acid esters can be used. Examples thereof include so-called non-dispersion type viscosity index improvers such as polymers or copolymers or hydrogenated products thereof, or so-called dispersion type viscosity index improvers obtained by copolymerizing various methacrylic acid esters containing a nitrogen compound. Specific examples of other viscosity index improvers include non-dispersion type or dispersion type ethylene-α-olefin copolymers (as α-olefins, propylene, 1-butene, 1-pentene and the like can be exemplified) or hydrides thereof. , Polyisobutylene or hydrogenated product thereof, styrene-diene hydrogenated copolymer, styrene-maleic anhydride copolymer, polyalkylstyrene and the like.

The molecular weight of these viscosity index improvers is preferably selected in consideration of shear stability. Specifically, the number average molecular weight of the viscosity index improver is usually 5,0 in the case of dispersion type and non-dispersion type polymethacrylate.
00 to 150,000, preferably 5,000 to 35,
In the case of 000, polyisobutylene or its hydride, it is usually 800 to 5,000, preferably 1,000 to
4,000, and usually 800 to 150,000 in the case of ethylene-α-olefin copolymer or its hydride.
00, preferably 3,000 to 12,000.

Among these viscosity index improvers, ethylene
When the -α-olefin copolymer or its hydride is used, a lubricating oil composition having particularly excellent shear stability can be obtained.

In the present invention, one kind or two or more kinds of compounds arbitrarily selected from these viscosity index improvers can be contained in an arbitrary amount, but the content is usually a lubricating oil. 0.1 to 40.0 based on the total amount of the composition
It is% by mass. (O) Defoaming Agent As the defoaming agent that can be used in combination with the lubricating oil composition for an automatic transmission of the present invention, any compound usually used as a defoaming agent for lubricating oil can be used. Examples include silicones such as dimethyl silicone and fluorosilicone. The lubricating oil composition of the present invention can contain one kind or two or more kinds of compounds arbitrarily selected from these, in an arbitrary amount, but the content is usually the total amount of the lubricating oil composition. It is 0.001-0.05 mass% on the basis. (P) Corrosion Inhibitor As the corrosion inhibitor that can be used in combination with the lubricating oil composition for an automatic transmission of the present invention, any compound commonly used as a corrosion inhibitor for lubricating oil can be used. Examples thereof include benzotriazole-based compounds, tolyltriazole-based compounds, and imidazole-based compounds. The lubricating oil composition of the present invention,
One kind or two or more kinds of compounds arbitrarily selected from these can be contained in an arbitrary amount, but the content is usually 0.01-based on the total amount of the lubricating oil composition.
It is 3.0% by mass. In the lubricating oil composition of the present invention,
Based on elemental analysis values based on the total amount of the composition, the mass ratio of phosphorus, calcium, boron, and sulfur in the composition is phosphorus: calcium: boron: sulfur = 1: (0.1
2): (0.06 to 2): (0.2 to 20). This ratio is phosphorus: calcium: boron: sulfur = 1:
(0.1-1.0): (0.1-0.8): (0.4-
5.0) is preferable.

The elemental phosphorus concentration in the lubricating oil composition is 0.010 to 0.060% by mass, preferably 0.020 to 0.050% by mass, based on the total amount of the composition.

The concentration of sulfur derived from the base oil is 0 in the base oil.
0.10 mass%, preferably 0-0.10.
0% by mass, and the sulfur concentration derived from the sulfur-based additive is 0.010 to 0.150% by mass, preferably 0.0100.150% by mass. When the mass ratio of each of the above elements, the phosphorus element concentration, the sulfur concentration in the base oil, and the sulfur concentration in the sulfur-based additive are outside the above ranges, respectively, the μ-V characteristic deteriorates and a scratch phenomenon occurs. It will be easier.

[0086]

EXAMPLES The present invention will be described below in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto. (Examples 1 to 8) and (Comparative Examples 1 to 5) The lubricating oil compositions of the present invention (Examples 1 to 8) having the compositions shown in Table 1 and comparative lubricating oil compositions (Comparative Examples 1 to 1) 5) was prepared respectively. Regarding the composition obtained, the following μ
A -V characteristic test was conducted and evaluated. The evaluation results are also shown in Table 1. (Testing method of μ-V characteristic) The μ-V characteristic was evaluated by the following friction test.

Apparatus: Falex No. 6 friction tester Surface pressure: 3 MPa Oil temperature: 80 ° C. μ-V Characteristic evaluation: Sliding speed 0.005 m / s and 0.020 m / s The coefficient of friction was measured to determine the sliding speed. The gradient of the friction coefficient with respect to (m / s) is obtained. There is a correlation between the positive and negative of the gradient and the presence or absence of the scratch phenomenon. If the gradient value is positive, the scratch phenomenon does not occur, but if it is negative, the scratch phenomenon is likely to occur.

[0088]

[Table 1]

As is clear from the results shown in Table 1, in the case of the lubricating oil compositions of the present invention (Examples 1 to 8), μ-V
Although a positive gradient can be obtained in all of the characteristic evaluations, the lubricating oils of Comparative Examples 1 to 5 in which the element ratio (mass ratio) of each element of phosphorus, calcium, boron, and sulfur does not satisfy the range specified in the present invention. No positive slope can be obtained in the μ-V characterization of the composition. Comparative Examples 6 to 7 Lubricating oil compositions for comparison (Comparative Examples 6 to 7) as shown in Table 2 were prepared. Using the composition obtained and Example 1 obtained above, the μ-V characteristics of the lubricating oil before and after running for a certain period of time (before and after oxidative deterioration) were evaluated. Oxidative deterioration treatment of lubricating oil composition is performed according to ASTM JIS K 2514.
In accordance with the ISOT method described in 1., an oil temperature of 165.5 ° C.,
It was carried out under the condition of 150 hours. The evaluation results are shown in Table 2.
Shown in.

[0090]

[Table 2]

As is clear from the results shown in Table 2, the composition of Example 1 maintains a positive gradient in the μ-V characteristic even after oxidative deterioration, while the sulfur concentration derived from the base oil is high. The composition of Comparative Example 6 and the composition of Comparative Example 7 having a high sulfur concentration derived from the additive show a negative gradient due to deterioration of the μ-V characteristic after oxidative deterioration.

[0092]

By using the lubricating oil composition of the present invention, the μ-V characteristic of the belt and the element can be made a positive gradient to prevent the scratch phenomenon, and the μ-V characteristic can be made a positive gradient for a long period of time. Can be held. Therefore, the lubricating oil composition of the present invention is suitable for a continuously variable transmission such as a belt CVT. Further, the lubricating oil composition for an automatic transmission according to the present invention can be suitably used for a stepped automatic transmission and a final reduction gear having a limited slip differential mechanism.

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[Procedure amendment]

[Submission date] April 12, 2002 (2002.4.1)
2)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

In the present invention, the elemental analysis value based on the total amount of the composition is such that the elemental ratio of phosphorus: calcium: boron: sulfur is 1: (0.1-2) :( 0.06-
2) :( 0.2-20), and and the phosphorus element concentration in the total amount of the composition is 0.0 1 to 0.06 wt%, sulfur concentration is 0-0.1 mass derived base oil %, And the sulfur concentration derived from the sulfur-based additive is 0.01 to
The lubricating oil composition for an automatic transmission is characterized in that it is 0.15% by mass.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

In the general formulas (3) and (4) , R ⁵ ,
R ⁶ , R ⁷ , R ⁸ , R ⁹ and R ¹⁰ each independently represent a hydrocarbon group having 1 to 30 carbon atoms, preferably 1 to 20 carbon atoms,
X is, S (sulfur atom) or a methylene group (-CH ₂ -) indicates, and e is an integer of 0 to 6.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

The lubricating oil composition of the present invention includes the above (A) to
Among the sulfur-based additives represented by (E) and their derivatives , one of the compounds may be used alone or two or more of them may be appropriately combined and used. In the present invention, the content of the sulfur-based additive is (A)
~ (E) and the sulfur element derived from the compound represented by those derivatives , and the sulfur element concentration which combined the sulfur element derived from another additive are 0 based on the lubricating oil composition total amount basis.
01-0.15 mass% and (A)-(E) and it
The phosphorus element concentration of the phosphorus element derived from the compound represented by these derivatives and the phosphorus element of the phosphorus-based additive is in the range of 0.01% by mass to 0.06% by mass based on the total amount of the lubricating oil composition. It is preferable that the amount is When the content of the sulfur-based additive is less than 0.01% by mass as the sulfur element or less than 0.01% by mass as the phosphorus element, there is no effect on the improvement of the μ-V characteristic and 0.15% by mass as the sulfur element. %, Or when it exceeds 0.06 mass% as a phosphorus element, the oxidation stability deteriorates, which is not preferable.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0043

[Correction method] Change

[Correction content]

In order to obtain even better μ-V characteristics, the content of the sulfur-based additive is derived from the compounds represented by (A) to (E) and their derivatives on the basis of the total amount of the lubricating oil composition. The sulfur concentration of the sulfur element and the sulfur element derived from other additives is 0.01 to 0.15 mass% based on the total amount of the lubricating oil composition, and (A) to (E) and
The amount of the phosphorus element concentration of the phosphorus element derived from the compound represented by the derivative and the phosphorus element of the phosphorus-based additive is in the range of 0.02 to 0.05 mass% based on the total amount of the lubricating oil composition. Is preferred.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction content]

Preferred examples of the component (F) include phosphoric acid; phosphorous acid; zinc dipropyldithiophosphate, zinc dibutyldithiophosphate, zinc dipentyldithiophosphate, zinc dihexyldithiophosphate, diheptyldithiophosphate. Zinc, zinc dialkyldithiophosphate such as zinc dioctyldithiophosphate (alkyl group may be linear or branched); monopropyl phosphate, monobutyl phosphate, monopentyl phosphate, monohexyl phosphate, monoheptyl phosphate, monooctyl phosphate Monoalkyl esters of phosphoric acid (alkyl groups may be linear or branched); mono (alkyl) aryl esters of phosphoric acid such as monophenyl phosphate, monocresyl phosphate; dipropyl phosphate, dibutyl phosphate Eto, dipentyl phosphate,
Phosphoric acid dialkyl esters such as dihexyl phosphate, diheptyl phosphate and dioctyl phosphate (alkyl groups may be linear or branched); Diphenyl phosphate, dicresyl phosphate and other phosphoric acid di (alkyl) aryl esters; Tripropyl phosphate , tributyl phosphate, tripentyl phosphate, trihexyl phosphate, triheptyl phosphine <br/> Eto, phosphoric acid trialkyl esters such as trioctyl phosphate (alkyl groups may be branched in linear); triphenyl phosphate, Tri (alkyl) aryl phosphates such as tricresyl phosphate;
Monopropyl phosphite, monobutyl phosphite,
Monopentyl phosphite, monohexyl phosphite, mono-heptyl phosphite, phosphorous acid monoalkyl esters, such as mono-octyl phosphite (the alkyl group may be branched be linear); monophenyl phosphite, Monokurejiru phosphorous acid mono (alkyl) aryl esters such as phosphite; dipropyl phosphite, dibutyl phosphite, dipentyl phosphite, dihexyl phosphite, diheptyl phosphite, dialkyl phosphite ester (alkyl group such as dioctyl phosphite Linear or branched); di (alkyl) aryl phosphite such as diphenyl phosphite, dicresyl phosphite; tripropyl phosphite, tributyl phosphite, tripentyl phosphite, trihexyl phosphite Phosphite trialkyl esters such as arsenite, tripeptyl phosphite, trioctyl phosphite (alkyl groups may be linear or branched); phosphite such as triphenyl phosphite, tricresyl phosphite Examples thereof include tri (alkyl) aryl ester; and mixtures thereof.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0062

[Correction method] Change

[Correction content]

When the component (G) is contained in the lubricating oil composition for automatic transmission of the present invention, the content thereof is not particularly limited, but is 0.01 to 5.0 mass% based on the total amount of the composition. It is preferably present, and more preferably 0.05 to 4.0% by mass. When the content of the ( G ) component is less than 0.01% by mass, the effect of suppressing the strength reduction due to repeated compression of the wet clutch tends to be insufficient, while when it exceeds 5.0% by mass, the composition is oxidized. Stability tends to decrease.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0070

[Correction method] Change

[Correction content]

When the component (H) is contained in the lubricating oil composition for automatic transmission of the present invention, the content is usually 0.01 to 10.0% by mass, preferably the total amount of the composition. , 0.1 to 7.0 mass% . The content of the component (H) is 0 . If it is less than 01% by mass, a sufficient cleaning effect cannot be obtained, while if it exceeds 10.0% by mass, the low temperature fluidity of the composition tends to be significantly deteriorated.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0085

[Correction method] Change

[Correction content]

The concentration of sulfur derived from the base oil is 0 in the base oil.
~ 0. A 1 wt%, sulfur concentration derived from the Lee Ou-based additive is 0.0 1 to 0.1 5 mass%. Mass ratio of each of the above elements, phosphorus element concentration, and sulfur concentration in the base oil,
When the sulfur concentration in the sulfur-based additive is outside the above range, the μ-V characteristic is deteriorated and the scratch phenomenon is likely to occur.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10M 135/20 C10M 135/20 135/32 135/32 135/36 135/36 137/02 137/02 137 / 04 137/04 137/08 137/08 137/10 137/10 AZ 159/22 159/22 159/24 159/24 // C10N 10:04 C10N 10:04 20:00 20:00 Z 30: 00 30:00 Z 40:04 40:04

Claims (3)

[Claims] 1. An elemental analysis value based on the total amount of the composition,
The element ratio of phosphorus: calcium: boron: sulfur is 1: (0.1-2) :( 0.06-2) :( 0.2 by mass ratio.
To 20), and the elemental phosphorus concentration is 0.01 to 0.06 mass% based on the total amount of the composition, the sulfur concentration derived from the base oil is 0 to 0.1 mass%, and the sulfur-based additive is A derived sulfur concentration is 0.01 to 0.15 mass%, a lubricating oil composition for an automatic transmission. 2. An elemental analysis value based on the total amount of the composition,
The element ratio of phosphorus: calcium: boron: sulfur is 1: (0.1-1) :( 0.1-0.8) :( 0.
4 to 5), the phosphorus element concentration is 0.02 to 0.05% by mass on the basis of the total amount of the composition, the sulfur concentration derived from the base oil is 0 to 0.1% by mass, and the sulfur-based additive is 2. The lubricating oil composition according to claim 1, wherein the sulfur concentration derived from is 0.01 to 0.15 mass%. 3. The sulfur-based additive is (A) thiadiazole and / or benzothiazole, (B) dithiocarbamate, (C) dithiophosphate, (D) trithiophosphite, and (E) polysulfide, or (A). ~
The lubricating oil composition according to claim 1 or 2, which is at least one compound selected from the derivatives of (E).