WO2005093020A1

WO2005093020A1 - Lubricating oil composition for industrial machinery and equipment

Info

Publication number: WO2005093020A1
Application number: PCT/JP2005/006410
Authority: WO
Inventors: Katsuya Takigawa; Yukiharu Beppu; Sinichi Mitsumoto; Masahiro Hata; Eiji Akiyama
Original assignee: Nippon Oil Corporation
Priority date: 2004-03-25
Filing date: 2005-03-25
Publication date: 2005-10-06
Also published as: US20080058235A1; EP1734103A1; EP1734103A4

Abstract

A lubricative composition for industrial machinery and equipment which comprises a base oil selected from among mineral oils, fats and oils, synthetic oils, and mixtures of two or more of them, and at least one additive selected from among the following components (A) to (D): (A): (A-1) a phosphorus-containing carboxylic acid and/or (A-2) a thiophosphoric ester (B): a dispersant viscosity index improver, (C): (C-1) a specific amidocarboxylic acid and/or (C-2) a specific carboxylic acid, and (D): an ester oiliness improver. The composition is favorable as a lubricating oil composition and useful as a gear oil composition, a lubricating oil composition for paper machines or slide guides, a hydraulic oil, or the like.

Description

Description Lubricating composition for industrial machinery

The present invention relates to a novel lubricating composition for industrial machinery, and in particular, has excellent lubricating properties such as abrasion resistance, extreme pressure properties, and frictional properties, and various properties required according to the state of use of the industrial machinery. More particularly, it relates to a gear oil composition, a lubricating oil composition for a paper machine, a lubricating oil composition for a sliding guide surface, and a hydraulic oil. In particular, gear oil compositions have excellent sludge resistance and extreme pressure properties, lubricating oil compositions for paper machines have excellent sludge resistance and extreme pressure properties, and lubricating oil compositions for sliding guide surfaces have friction properties and stick slip. It has excellent prevention properties, and hydraulic fluids have excellent sludge control properties, wear resistance and friction properties. Background art

About gear oil composition:

Higher efficiency and energy saving have been remarkably improved with the development of industry, but the demands for these are still eternal issues. Gears used in various industrial machines are also required to have high efficiency and low cost. Along with this trend, there is a growing demand for gear oils that can withstand higher temperatures and can be operated under higher loads, in combination with the trend toward higher speeds and higher output.

For example, the following Patent Documents 1 and 2 relating to gear oil disclose blending of a sulfur-based extreme pressure additive with a phosphorus-based extreme pressure additive in gear oil.

However, conventional gear oils do not always have sufficient sludge resistance and extreme pressure resistance when used in gears of recent industrial machines. In other words, lubricating oils containing an extreme pressure agent such as zinc dialkyldithiophosphate are widely used for applications requiring high extreme pressure properties and wear resistance. Even when a small amount of the agent is added, a large amount of sludge is generated when a thermal load is applied, and the thermal oxidation stability tends to decrease. Therefore, it is difficult for lubricating oils containing sulfur-based extreme pressure agents to achieve sufficient heat and oxidation stability in gears of recent industrial machines and the like. On the other hand, phosphorus-based extreme pressure agents tend to generate less sludge than sulfur-based extreme pressure agents, but when phosphorus-based extreme pressure agents are used alone, high extreme pressure properties at the gear oil level can be obtained. Is difficult.

[Patent Document 1] Japanese Patent Application Laid-Open No. H10-25993394

[Patent Document 2] Japanese Patent Application Laid-Open No. Hei 9-1990

About lubricating oil composition for paper machine:

In addition, there is a process of drying the paper after making the paper with the paper machine, but the drying time is relatively long and the drying temperature is low with the conventional paper machine. However, in recent paper machines, the time required for the drying process has been shortened due to the improvement in production efficiency, and as a result, the drying temperature has also become extremely high, and heat resistance to the lubricating oil used in the paper machine has been reduced. The demand for wear resistance is also increasing, and the level of wear resistance required for the lubricating oil is also increasing. Furthermore, paper machines use strongly acidic white water when making paper.Since this white water has a tendency to corrode metals, lubricating oil for paper machines can also prevent machine corrosion caused by these white water. It has been demanded. As described above, lubricating oils for paper machines have large required performances such as heat resistance, abrasion resistance and corrosion resistance.

Here, conventional lubricating oils for paper machines generally use extreme pressure agents to improve their abrasion resistance, but the use of extreme pressure agents results in poor heat resistance, and sludge coking in the lubricated part. Etc. are likely to occur. Therefore, it is conceivable to use a large amount of a metal-based detergent or ashless dispersant to suppress sludge.However, when these are used, problems such as deterioration of the anticorrosion property and corrosion of the paper machine body occur. As a result, it was difficult to satisfy all of the above-mentioned required properties of heat resistance, abrasion resistance and corrosion resistance. For example, Patent Document 3 proposes a lubricating oil for a paper machine that is simultaneously excellent in heat resistance, abrasion resistance and corrosion resistance, but is not always satisfactory.

[Patent Literature 3] Japanese Patent Application Laid-Open No. 2000-977485 About lubricating oil composition for sliding guideway:

In addition, if a stick slip occurs on a sliding guide surface such as a machining table of a machine tool, the frictional vibration is transferred to the workpiece as it is, resulting in a decrease in processing accuracy or a tool life due to the vibration. Problems such as a decrease in Therefore, lubricating oils for sliding guide surfaces are required to have low friction (small coefficient of friction) and high anti-stick-slip properties between metal surfaces.

Regarding prevention of stick-slip, for example, lubricating oil compositions combining sulfur compounds, esters and fatty acids (see, for example, Patent Document 4), lubricating oil compositions combining sulfur compounds and amine salts of phosphorus compounds (See, for example, Patent Document 5).

With respect to friction characteristics, for example, lubricating oil compositions in which an acidic phosphate ester or an alkyl ammonium salt thereof, phosphorous acid, a fatty acid and a linear alkylamine are combined (for example, see Patent Document 6), a phosphorus compound A lubricating oil composition for a sliding guide surface using a glyceryl ether compound and a phosphate ester or an amine salt thereof (for example, see Patent Document 7). (See 8).

[Patent Document 4] Japanese Patent Application Laid-Open No. 57-676993

[Patent Document 5] Japanese Patent Application Laid-Open No. 51-7405

[Patent Literature 6] Japanese Patent Application Laid-Open No. H08-134344

[Patent Literature 7] Japanese Patent Application Laid-Open No. Hei 8-2099-175

[Patent Document 8] Japanese Patent Application Laid-Open No. H11-2090975

However, it is not always easy to achieve both frictional properties and stick-slip prevention properties, and conventional lubricating oils for sliding guide surfaces have not had satisfactory performance.

About hydraulic fluid:

In recent years, hydraulic operating systems have become more and more sophisticated, and in order to provide high-speed, high-precision control, a valve such as a spool valve controls the flow rate, direction, etc. of the hydraulic system. There are many cases to attach I'm wearing Since the performance of such spool valves and support valves is greatly reduced when sludge is generated in the hydraulic fluid, it is excellent for hydraulic fluids used in recent sophisticated systems. At the same time as wear resistance, a sludge-less hydraulic fluid that does not generate sludge is strongly required.

On the other hand, due to the revision of the Law Concerning the Rational Use of Energy, in factories designated as designated energy management factories, energy reduction is an essential item, and it is necessary to set numerical targets every year and implement energy conservation. As a part of energy saving, reduction of power consumption of operating motors in hydraulic actuators widely used in factories has become an important issue. For this reason, hydraulic oils are required to have improved characteristics from the viewpoint of energy saving.

Against this background, new hydraulic fluids are being developed to meet the above demands. For example, in the past, zinc-based antiwear agents such as zinc dithiophosphate (ZnDTP) have been widely used as antiwear agents for hydraulic fluids, but the use of zinc-based antiwear agents causes sludge formation. Can be The wear prevention effect of the use of Zn DTP is due to the formation of a hard coating such as iron phosphate on the metal surface.However, the formation of the coating increases the friction coefficient of the sliding part, thereby saving energy. It is not preferable from the viewpoint of. Therefore, hydraulic fluids using non-zinc-based antiwear agents are being studied.For example, instead of Zn DTP, the purpose is to prevent the generation of sludge and ensure wear resistance. Non-zinc hydraulic fluids containing non-zinc antiwear agents such as aromatic phosphates, phosphites and their amine salts, thiophosphates, and 3-dithiophosphorylated propionic acid compounds Its use has been proposed (see, for example, Patent Documents 9 to 11).

Furthermore, in order to improve oxidation stability and lubrication performance under high pressure, oily agents such as polyhydric alcohol full esters or partial esters or fatty acid amides are used in combination with amine antioxidants, phenol antioxidants and A hydraulic fluid mixed with a predetermined base oil together with a phosphate ester has been disclosed. See pp. 12).

[Patent Document 9] JP-A-10-67993

[Patent Document 10] JP-A-11-217577

[Patent Document 11] Japanese Patent Laid-Open No. 2002-265971

[Patent Document 12] Japanese Patent Application Laid-Open No. 09-1 1277 Disclosure of the Invention

The first aspect of the present invention is that at least one type of additive selected from the following components (A) to (D) is used as a base oil selected from mineral oils, fats and oils, synthetic oils, and mixed oils thereof. It is a lubricating composition for industrial machinery and equipment containing an agent.

(A) Ingredient:

(A-1) a phosphorus-containing carboxylic acid compound and / or (A-2) thiophosphate,

Component (B): Dispersion type viscosity index improver

(C) Ingredient:

The following (C-1) and Z or (C-1) components:

Component (C-1): at least one compound represented by the following general formulas (1) to (3):

R ¹ -CO—NR ² — (CH ₂ ) _n —COOX ¹ (1) (where R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, and R ² is a carbon number An alkyl group of 1 to 4, X ¹ is hydrogen, an alkyl group of 1 to 30 carbon atoms or an alkenyl group of 1 to 30 carbon atoms, and n is an integer of 1 to 4.)

[R ^ CO-NR ^2- (CH ₂ ) _n -COO] _n Y ¹ (2) (wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, R ² is an alkyl group having 1 to 4 carbon atoms, Y ¹ is an alkali metal or alkaline earth metal, n is an integer of 1 to 4, m is 1 when Y is an alkali metal, and 1 when Y is an alkaline earth metal. Shows 2.)

[R ¹ — CO— NR ² — (CH ₂ ) _n -COO] _ffl -Z- (〇H) (3) (wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkyl group having 6 to 30 carbon atoms. Arqueni R, R ² is an alkyl group having 1 to 4 carbon atoms, Z is a residue of a dihydric or higher polyhydric alcohol excluding the hydroxyl group, m is an integer of 1 or more, m 'is an integer of 0 or more, m + m 'Is the valence of Z, and n is an integer of 1 to 4. )

Component (C-1): a compound represented by the following general formula (4)

R ³ -CH ₂ COOH General formula (4)

(In the formula, R ³ represents an alkyl group having 7 to 29 carbon atoms, an alkenyl group having 7 to 29 carbon atoms, or a group represented by the general formula (5).)

^{_{_{R 4 -C 6 H 4 0- (}}} 5) ( wherein, R ⁴ represents an alkyl group or hydrogen having 1 to 20 carbon atoms.)

(D) Component: Ester oily agent.

The second aspect of the present invention is the first lubricating composition of the present invention as a gear oil composition, wherein the additive is any one selected from the components (A) to (C).

The gear oil composition is excellent in sludge resistance performance and extreme pressure resistance.

A third aspect of the present invention is the first lubricating composition of the present invention as a lubricating oil composition for a paper machine, wherein the additive is any one selected from components (A) to (C). is there.

The lubricating oil composition for a paper machine has excellent sludge resistance and extreme pressure properties.

A fourth aspect of the present invention is the first lubricating composition of the present invention as a lubricating oil composition for a sliding guide surface, wherein the additive is any one selected from components (A) to (C). It is.

The above-mentioned lubricating oil composition for sliding guide surfaces is excellent in both frictional properties and stick-slip prevention properties.

A fifth aspect of the present invention is that the additive comprises a phosphorus-containing carboxy oxide compound of the component (A-1) and a dispersed viscosity index improver of the component (B), and the additive as a lubricating oil composition Is a first lubricating composition.

A sixth aspect of the present invention is that the additive comprises a thiophosphate of the component (A-2) and a dispersion-type viscosity index improver of the component (B). Is a lubricating composition. A seventh aspect of the present invention is the lubricating oil composition according to the first aspect, wherein the additive is an ester oily agent of the component (D), which is an ester of a polyhydric alcohol and a monobasic acid fatty acid. It is a lubricating composition.

In an eighth aspect of the present invention, the ester oily agent of the component (D), which is an ester of the polyhydric alcohol and a fatty acid of a monobasic acid, is selected from the following esters (D-1) to (D-3). A seventh lubricating composition of the present invention, which is any one of the above.

(D-1): ester of a polyhydric alcohol containing a partial ester having a degree of esterification of 1 and a partial ester having a degree of esterification of 2 or more, and an unsaturated fatty acid,

(D-2): a complete ester of a polyhydric alcohol with a mixed fatty acid of a short-chain fatty acid and a long-chain fatty acid,

(D-3): An ester of a polyhydric alcohol containing a partial ester having a degree of esterification of 1 and a partial ester having a degree of esterification of 2 or more and a branched saturated fatty acid.

A ninth aspect of the present invention is the eighth lubricating composition of the present invention, wherein the lubricating oil composition is a hydraulic oil.

The above-mentioned hydraulic fluid is excellent in all of sludge suppressing properties, wear resistance and friction characteristics. Brief Description of Drawings

FIG. 1 is a schematic configuration diagram illustrating a friction coefficient measurement system used in an example of a lubricating oil composition for a sliding guide surface according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing a stick-slip prevention evaluation apparatus used in an example of a lubricating oil composition for a sliding guide surface according to an embodiment of the present invention.

FIG. 3 is a graph showing an example of a correlation between a friction coefficient and time obtained by using the apparatus shown in FIG.

FIG. 4 is a graph showing the separation of each layer in an evaluation test of the separation property with respect to a water-soluble cutting fluid in an embodiment of one lubricating oil composition for a sliding guide surface according to the embodiment of the present invention. It is explanatory drawing which shows a separation state.

FIG. 5 is a diagram for explaining the arrangement and operation of the disc and the pole in an S RV (micro reciprocating friction) test in an example of one hydraulic fluid composition according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

In the lubricating composition of the present invention, at least one selected from mineral oils, fats and oils, and synthetic oils is used as a base oil.

'The mineral oil used here is solvent dewatering, solvent extraction, hydrocracking, solvent dewaxing, contact dewaxing, and lubricating oil fractions obtained by atmospheric and vacuum distillation of crude oil. Examples thereof include paraffinic or naphthenic mineral oils obtained by applying one or more kinds of purification means such as hydrorefining, sulfuric acid washing, and clay treatment in an appropriate combination. It is also possible to use a wax isomerized base oil, a base oil produced by a method of isomerizing GTL WAX (gas liquid wax), and the like.

Examples of fats and oils include beef tallow, lard, sunflower oil, soybean oil, rapeseed oil, rice bran oil, coconut oil, palm oil, palm kernel oil, and hydrogenated products thereof.

Examples of synthetic oils include poly-α-olefin (ethylene-propylene copolymer, polybutene, 1-octene oligomer, 1-decene oligomer, and hydrides thereof), alkylbenzene, alkylnaphthalene, monoester (Butyl stearate, octyl laurate), diesters (ditridecyl glulate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sepate, etc.), polyesters (trimellitic acid) Esters), polyol esters (trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 1 ^ 2-ru-2-ethylhexanoate, penju erythritol perargonate, etc.), polyoxya Alkylene glycol, polyphenyl ether, dialkyl diphenyl ether, phosphate ester (tricresyl Phosphate, etc.), fluorinated compounds (perfluoropolyether, fluorinated polyolefin, etc.), silicone oils and the like.

Of these base oils, preferred are mineral oils, polyQ! -Refin, polyol esters, and polyoxyalkylenedaricols.

As the base oil of the lubricating composition of the present invention, the above-described base oils may be used alone or in combination of two or more.

Incidentally, the kinematic viscosity of these base oils is arbitrary not particularly limited, 4 the lower limit of 0 ° C kinematic viscosity, 1 0 mm ² Z s or more from the standpoint of pitting resistance, preferably 2 0 mm ² / s or more, more preferably 40 mm ² / s or more, most preferably 60 mm ² Zs or more, and the upper limit of is 100 mm ² Z from the viewpoint that friction loss due to stirring resistance is small. s or less, preferably 5 0 0 0 MMV s, more preferably not more than ^{1 0 0 0 mm 2 Z s} . The viscosity index is also arbitrary, but the lower limit is at least 80, preferably at least 90, from the viewpoint of suppressing oil film deterioration at high temperatures. And generally it is a value of 500 or less. Further, the pour point is also arbitrary, but usually, the pour point is preferably 15 ° C. or lower, more preferably 115 ° C. or lower, in view of low-temperature characteristics.

The lubricating composition, the above base oil, blending at least one additive selected from the aforementioned components (A) ~ (D) component ₉

Hereinafter, the components (A) to (D) will be further described.

The component (A) is (A-1) a phosphorus-containing carboxylic acid compound, (A-2) a thiophosphate, or a mixture thereof.

(A-1) Ingredient:

(A-1) The phosphorus-containing carboxylic acid compound will be described.

(A-1) The phosphorus-containing carboxylic acid compound only needs to contain both a carboxyl group and a phosphorus atom in the same molecule, and its structure is not particularly limited. However, phosphorylated carboxylic acids are preferred in view of extreme pressure properties and thermo-oxidative stability.

Examples of the phosphorylated carboxylic acid include a compound represented by the following general formula (6). —General formula (6)

[In the formula (6), R ⁵ and R ⁶ may be the same or different and each represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and ⁷ represents an alkylene group having 1 to 20 carbon atoms. And R ⁸ represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and X ¹ , X ² , X ³ and X ⁴ may be the same or different and each represent an oxygen atom or a sulfur atom. ]

In the general formula (6), R ⁵ and R ⁶ each represent a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms. Examples of the hydrocarbon group having 1 to 30 carbon atoms include an alkyl group, an alkenyl group, a cycloalkyl group, a bicycloalkyl group, a tricycloalkyl group, an alkylcycloalkyl group, an alkylbicycloalkyl group, an alkyltricycloalkyl group, and a cycloalkylalkyl. Group, bicycloalkylalkyl group, tricycloalkylalkyl group, aryl group, alkylaryl group, arylalkyl group and the like. Further, R ⁵ and R ⁶ may combine to form a divalent group represented by the following general formula (7). The two bonds of the divalent group bond to X ¹ and X ² , respectively.

General formula (7)

[In the formula (7), R ⁹ and R ^{1 Q} may be the same or different and each represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and both R ⁹ and R ¹⁰ are methyl groups. Is preferred. ]

As R ⁵ and R ⁶ , among these, an alkyl group, a cycloalkyl group, a cycloalkylalkyl group, a tricycloalkylalkyl group, an aryl group, an alkylaryl group, and the above general formula ( ^{1) in} which R ¹ and R ² are bonded to each other It is preferably a divalent group represented by 7), and more preferably an 'alkyl group.

R. ^5, the alkyl group as R ⁶ is but it may also be either a straight-chain or branched. Further, the alkyl group preferably has 1 to 18 carbon atoms. Specific examples of such an alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a tertiary butyl group, a pentyl group, an isopentyl group, and a hexyl group. , Heptyl, 3-heptyl, octyl, 2-ethylhexyl, nonyl, decyl, pendecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, hexadecyl Group, octyl decyl group, 2-methylbutyl group, 1-methylphenyl group, 1,3-dimethylbutyl group, 1,1,3,3-tetramethylbutyl group, 1-methylhexyl group, isoheptyl group , 1-methylheptyl group, 1,1,3-trimethylhexyl group and 1-methyl-decenyl group. Among them, an alkyl group having 3 to 18 carbon atoms is preferable, and an alkyl group having 3 to 8 carbon atoms is more preferable.

Examples of the cycloalkyl group as R ⁵ and R ⁶ include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, a cyclododecyl group, and the like. Among these, a cycloalkyl group having 5 or 6 carbon atoms (cyclopentyl group and cyclohexyl group) is preferable, and a cyclohexyl group is particularly preferable.

As the cycloalkylalkyl group as R ⁵ and R ⁶ , a cycloalkylmethyl group is preferable, a cycloalkylmethyl group having 6 or 7 carbon atoms is more preferable, and a cyclopentylmethyl group and a cyclohexylmethyl group are particularly preferable. That's right. '

As the bicycloalkylalkyl group as R ⁵ and R ⁶ , a bicycloalkylmethyl group is preferable, a bicycloalkylmethyl group having 9 to 11 carbon atoms is more preferable, and a decalinylmethyl group is particularly preferable.

The Torishiku port alkyl group as R ^5, R ^6, preferably tricyclo alkyl methyl group, more preferably Bok Rishiku port alkyl methyl group carbon atoms 9-1 5, the following formula (8) or (9) The groups represented are particularly preferred.

General formula (8)

General formula (9)

R ^&, as the § Li Ichiru and alkyl § aryl group as R ^6, phenylene group, a tolyl group, a xylyl group, Echirufueniru group, Bierufueniru group, main Chirufueniru group, dimethyl-phenylalanine group, trimethyl phenylalanine group , Etiluf Phenyl group, isopropylphenyl group, tert-butylphenyl group, di-tert-butylphenyl group, 2,6-di-tert-butyl-4-methylphenyl group and the like. Among these, an aryl group and an alkyl aryl group having 6 to 15 carbon atoms are preferable.

R ⁷ represents an alkylene group having 1 to 20 carbon atoms. The alkylene group preferably has 1 to 10, more preferably 2 to 6, and still more preferably 3 to 4 carbon atoms. As such an alkylene group, those represented by the following general formula (10) are preferable.

—General formula (10)

In the general formula (10), R ¹¹ , R ¹² , R ¹³ and R ¹⁴ may be the same or different and each represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and R ¹¹ R ¹² and R ¹³ And the total number of carbon atoms in R ¹⁴ is 6 or less. Also, preferably, R ¹¹ , R ¹² , R ¹³ and R ¹⁴ may be the same or different and each represent a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms, and each of R ¹¹ , R ¹² , R ¹³ and The total number of carbon atoms in R ¹⁴ is 5 or less. More preferably, R ¹¹ R ¹² , R ¹³ and R ¹⁴ may be the same or different and each represent a hydrogen atom or a hydrocarbon group having 1 or 2 carbon atoms, and R ¹¹ R ¹² , R ¹³ and R ¹⁴ The total number of ¹⁴ carbon atoms is 4 or less. Particularly preferably, R ¹¹ , R ¹² , R ¹³ and R ¹⁴ may be the same or different and each represent a hydrogen atom or a hydrocarbon group having 1 to 2 carbon atoms, and each of R ¹¹ , R ¹² , R ¹³ and The total number of carbon atoms in R ¹⁴ is 3 or less. Most preferably, either R ¹³ or R ¹⁴ is a methyl group and the remaining three groups are hydrogen atoms. R ⁸ in the general formula (6) represents a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms. Such hydrocarbon groups include hydrocarbon groups exemplified in the description of R ⁵ and R ^6.

X ² , X ³ , X ⁴ and X ⁵ in the general formula (6) may be the same or different and each represent an oxygen atom or a sulfur atom. From the viewpoint of extreme pressure, at least one of X ² , X ³ , X ⁴ or X ⁵ is preferably a sulfur atom, more preferably at least two is a sulfur atom, and two are sulfur atoms. More preferably, the remaining two are Yasuko Oxygen. In this case, which of X ² , X ³ , X ⁴ or X ⁵ is a sulfur atom is optional, but X ² and X ³ are oxygen atoms and X ⁴ and X ⁵ are sulfur atoms. Preferably, there is.

As described above, each group in the general formula (6) has been described, but 3-dithiophosphorylated propionic acid (represented by the following general formula (11)) is preferably used because of its superiority in extreme pressure.

General formula (1 1)

[In the formula (11), R ⁵ and R ⁶ represent the same definition as R ⁵ and R ⁶ in the formula (6), respectively, and I ¹¹ , R ¹² , R ¹³ and R ¹⁴ each represent (1 0 The same definition content as R ¹¹ R ¹ R ¹³ and R ^{14 in} ) is shown. ]

Next, (A-2) thiophosphate will be described.

(A-2) Ingredient: thiophosphate

The (A-2) thiophosphate according to the present invention has the following general formula (12): 16

-General formula (1 2)

[Wherein, R ^{15 to} R ¹⁷ may be the same or different and each represent a hydrocarbon group having 1 to 24 carbon atoms]

It is a compound represented by these.

Specific examples of the hydrocarbon group having 1 to 24 carbon atoms represented by a length of ¹⁵ to 1 ^ ¹⁷ include an alkyl group, a cycloalkyl group, an alkenyl group, an alkylcycloalkyl group, an aryl group, and an alkyl group. Examples include a reel group and an arylalkyl group.

Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, a pendecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, Alkyl groups such as a pentadecyl group, a hexadecyl group, a heptane decyl group and an octadecyl group (the alkyl groups may be linear or branched). Examples of the cycloalkyl group include cycloalkyl groups having 5 to 7 carbon atoms, such as a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. Examples of the alkylcycloalkyl group include a methylcyclopentyl group, a dimethylcyclopentyl group, a methylethylcyclopentyl group, a dimethylcyclopentyl group, a methylcyclohexyl group, a dimethylcyclohexyl group, and a methylethylcyclohexyl group. Alkyl group having 6 to 11 carbon atoms such as a dimethylcycloheptyl group, a methylcycloheptyl group, a dimethylcycloheptyl group, a methylethylcycloheptyl group, a getylcycloheptyl group. The substitution position is also arbitrary). Examples of the alkenyl group include a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, a decenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, and a hexadecenyl group. And alkenyl groups such as heptane decenyl group and octadecenyl group (these alkenyl groups may be linear or branched, and the position of the double bond is also arbitrary).

Examples of the aryl group include aryl groups such as a phenyl group and a naphthyl group. The alkylaryl group includes, for example, 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, a nonylphenyl group. Group, decylphenyl group, didecylphenyl group, dodecylphenyl group, etc., alkyl aryl group having 7 to 18 carbon atoms (the alkyl group may be linear or branched, and the substitution position of the aryl group is arbitrary. Is).

Examples of the 7-realkyl group include a phenylalkyl group having 7 to 12 carbon atoms such as a benzyl group, a phenylethyl group, a phenylpropyl group, a phenylbutyl group, a phenylpentyl group, and a phenylhexyl group. Linear or branched).

The hydrocarbon group R ^{¹ 5} ~R ¹ ⁷ carbon number 1-2 4 represented by an alkyl group, Ariru group, preferably an alkyl § aryl group, an alkyl group having a carbon number of 4 to 1 8 carbon Alkylaryl groups and phenyl groups of the numbers 7 to 24 are more preferred.

Specific examples of the thiophosphate represented by the general formula (12) include tributylphosphorothionate, tripentylphosphorothionate, trihexylphosphorothionate, and triheptyl. Phosphorocarbonate, Trioctylphosphorocarbonate, Trinonylphosphorocarbonate, Tridecylphosphorocarbonate, Tridandecylphosphorocarbonate, Tridodecylphosphorocarbonate, Tritridecylphosphorocarbonate, Tritetra Decylphosphorothionate, Tripen decyl phosphorothionate, trihexadecyl phosphoro thionate, trihepdecyl decyl phosphoro thionate, trioctadecyl phosphoro thionate, trioleyl phosphoro thionate, triphenyl phosphoro thionate, tricresyl Phosphorothionate, Trixylenylphosphorothionate, Cresyldiphenylphosphorothionate, Xylenyldiphenylphosphorothionate, Tris (n-propylphenyl) phosphorothionate, Tris (Isopropylphenyl) phosphorothionate, Tris (n-butylphenyl) phosphorothionate, Tris (isobutylphenyl) phosphorothionate, Tris (s-butylphenyl) phosphorothionate , Tri scan (t one butylphenyl) phosphorothioate Chio titanate or the like, can be mentioned. Also, a mixture of these can be used.

The lubricating composition of the present invention may contain the (A-1) phosphorus-containing carboxylic oxide compound or (A-2) thiophosphate alone or both.

Component (B): Dispersion type viscosity index improver

The component (B) of the lubricating composition of the present invention is a dispersion-type viscosity index improver. As the dispersion-type viscosity index improver referred to here, any compound used as a dispersion-type viscosity index improver for lubricating oil can be used. Specifically, for example, the following general formulas (13), (13) One or more monomers (B_l) selected from the compounds represented by 14) or (15) and the compound represented by the following general formula (16) or (17) And a hydride of the copolymer obtained by copolymerizing one or more nitrogen-containing monomers (B-2) selected from the group consisting of:

(B-1) ingredient

General formula (13)

R ²⁰

CH: C

General formula (14)

R ²¹

CH = CH

-General formula (15)

(B-2) Ingredient

twenty two

R

CH ₂ = C-general formula (1 6)

[Also, individually, specifically, ′, a dimethinoleamino group, a methylamino group, a pyruvamino group, a dibutylamino group, a dibutylamino group, an anilino group (-NH-), a toluidino group ((XV-NH—), a xylidino group (NH—), Acecila:

^ 'CH ₃ ^ ~~'

Group (CH ₃ CONH—), benzylamino group (((-CONH—), morpholino group

), Pyrrolyl group (HNN ——:), pyridyl

N

;), A pyrrolidonyl group (

Examples thereof include an imidazolino group (N—) and a birazino group (). 1

R ²

CH ₂ = C General formula (17),

Y ⁵

[As Y ⁵ are each independently Specifically, Jimechinoreamino group, Jechi Ruamino group, dipropylamino group, Jibuchiruamino group, Anirino group (^^ _ _NH _).

CH ₃ ^^. CH ₃ ^^

Toluidino group ({jV-NH—), xylidino group (ku (~ → rH—), acetinoleamino group (CH ₃ CONH——), benzoylamino group ()) — CONH—), monoreholino group, pyridinole group

. ]

Formula (13), in (14) and (15), R ¹⁸ and R ^2Q are each independently a hydrogen atom or a methyl group, R ¹⁹ represents an alkyl group having 1 to 18 carbon atoms, R ²¹ Represents a hydrocarbon group having 1 to 12 carbon atoms, Y ² and Y ³ each independently represent a hydrogen atom, a residue of an alkyl alcohol having 1 to 18 carbon atoms (one OR ²⁵ : R ²⁵ represents 1 to 12 carbon atoms) And a monoalkylamine residue having 1 to 18 carbon atoms (—NHR ²⁶ : R ²⁶ represents an alkyl group having 1 to 18 carbon atoms), respectively.

As the alkyl group having 1 to 18 carbon atoms of R ¹⁹ , R ²⁵ and R ²⁶ , specifically, each independently represents a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, Alkyl groups such as heptyl, octyl, nonyl, decyl, pendecyl, dodecyl, tridecyl, tetradecyl, pendecyl, hexadecyl, hepdecyldecyl, octadecyl, etc. Linear or branched).

Specific examples of R ²¹ include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a Noel group, a decyl group, a pendecyl group and a dodecyl group. Alkyl groups (these alkyl groups may be linear or branched); alkenyl groups such as butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, pentadecenyl and dodecenyl (These alkenyl groups may be linear or branched.); Cycloalkyl groups having 5 to 7 carbon atoms, such as cyclopentyl, cyclohexyl, and cycloheptyl; methylcyclopentyl, dimethylcyclopentyl, and methylethyl Tylcyclopentyl, getylcyclopentyl, methylcyclohexyl, dimethylcyclo Alkylcyclo having 6 to 11 carbon atoms such as hexyl group, methylethylcyclohexyl group, acetylcyclohexyl group, methylcycloheptyl group, dimethylcycloheptyl group, methylethylcycloheptyl group, and methylcycloheptyl group Alkyl group (alkyl group may be linear or branched, and the bonding position to cycloalkyl group is arbitrary); aryl groups such as phenyl group and naphthyl group: tolyl group, xylyl group, and ethylphenyl Group, propylphenyl group, butylphenyl group, Each alkylaryl group having 7 to 12 carbon atoms such as a pentylphenyl group and a hexylphenyl group (the alkyl group may be linear or branched, and the bonding position to the aryl group is arbitrary); C7-C12 arylalkyl groups such as benzyl, phenylethyl, phenylpropyl, phenylbutyl, phenylpentyl, and phenylhexyl groups (the alkyl group may be linear or branched; The position of the aryl group to the alkyl group is also arbitrary.).

Preferred examples of the monomer as the component (B-1) include, specifically, a C1-18 alkyl acrylate, a C1-18 alkyl methacrylate, an olefin having 2-20 carbon atoms, styrene, Examples include methylstyrene, maleic anhydride ester, maleic anhydride amide, and mixtures thereof. Among them, the monomer as the component (B-1) is a monomer represented by the general formula (13), for example, an alkyl (meth) acrylate having an alkyl group having 1 to 18 carbon atoms.

On the other hand, in the general formula (16) and the general formula (17) as the component (B-2), R ²² and R ²⁴ each independently represent a hydrogen atom or a methyl group, and R ²³ has 2 to 18 carbon atoms. And a represents an integer of 0 or 1.

Y ⁴ and Y ⁵ each independently represent an organic group containing a nitrogen atom having 1 to 30 carbon atoms.

Y ⁴ and Y ⁵ are preferably a group having a ring, and such a ring is more preferably a group having an aliphatic ring rather than an aromatic ring.

Y ⁴ and Y ⁵ are preferably groups having a 6-membered ring from the viewpoint of sludge suppression.

Y ⁴ and Y ⁵ are more preferably groups having an oxygen-containing atomic ring from the viewpoint of inhibiting sludge.

Y ⁴ and Y ⁵ are preferably groups having one nitrogen atom. As Y ⁴ and Y ⁵ , a morpholino group is most preferred from the viewpoint of sludge suppression.

Specific examples of R ²³ include an ethylene group, a propylene group, a butylene group, and ぺ Nthylene group, hexylene group, heptylene group, octylene group, nonylene group, decylene group, pendecylene group, dodecylene group, tridecylene group, tetradecylene group, pentadecylene group, hexadecylene group, heptane decylene group, octadecylene group, etc. (The alkylene groups may be linear or branched).

In the general formula (16) and the general formula (17) as the component (B-2) monomer, the monomer represented by the general formula (16) is preferable from the viewpoint of sludge suppression. Specifically, dimethylaminomethyl methacrylate, acetylaminomethyl methacrylate, dimethylaminoethyl methacrylate, methylaminoethyl methacrylate, 2-methyl-5-vinylpyridine, morpholinomethyl methacrylate, morpholinoethyl methacrylate and mixtures thereof Etc. can be exemplified.

From the above, the dispersion type viscosity index improver as the component (B) means a copolymer containing a nitrogen-containing monomer as a comonomer, such as the component (B-2). The dispersion-type viscosity index improver as the component (B) includes one or more monomers selected from the components (B-1) and one or two or more monomers selected from the components (B-2). It can be obtained by copolymerizing two or more types of nitrogen-containing monomers. The molar ratio of component (B-1) to component (B-2) during copolymerization is arbitrary, but is generally about 80:20 to 95: 5. The reaction method for the copolymerization is also optional, but usually, the component (B-1) and the component (B-2) are subjected to radical solution polymerization in the presence of a polymerization initiator such as benzoyl peroxide. A copolymer can be easily obtained. The number average molecular weight of the dispersant type viscosity index improver as the component (B) is also arbitrary, but is usually from 1,000 to 1,500,000, preferably from 10,000 to 200,000. It is desirable to use those.

C component:

The component (C-11) and the component (C-12) to be added to the lubricating composition of the present invention will be described again in more detail as follows.

That is, the component (C-1) has the following general formulas (1) to (3) At least one compound represented by the formula:

(In the formula, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkyl group having 6 to 30 carbon atoms, R ² is an alkyl group having 1 to 4 carbon atoms, X ¹ is hydrogen, and 1 to 30 carbon atoms. An alkyl group or an alkenyl group having 1 to 30 carbon atoms, and n represents an integer of 1 to 4.) [Ri—CO—NR ² — (CH ₂ ) _n —COO ^ Y ¹ (2) ^ Is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, R ² is an alkyl group having 1 to 4 carbon atoms, Y ¹ is an alkali metal or alkaline earth metal, n is 1 to 4 M is ¹ when Y ¹ is an alkali metal, and 2 when Y ¹ is an alkaline earth metal.)

[R ¹ — CO— NR ² — (CH ₂ ) _n -COO] _m -Z- (OH) _n . (3) (wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or 6 to 30 carbon atoms) R ² is an alkyl group having 1 to 4 carbon atoms, Z is a residue excluding a hydroxyl group of a dihydric or higher polyhydric alcohol, m is an integer of 1 or more, m 'is an integer of 0 or more, m + m 'is a valence of Z, and n is an integer of 1 to 4.)

In the general formulas (1) to (3), R ¹ represents an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms. From the viewpoint of solubility in base oil, etc., it is necessary that the alkyl group or alkenyl group has 6 or more carbon atoms, preferably 7 or more carbon atoms, more preferably 8 or more carbon atoms. . Further, from the viewpoint of storage stability and the like, it is necessary that the alkyl group or the alkenyl group has 30 or less carbon atoms, preferably 24 or less carbon atoms, and more preferably 20 or less carbon atoms. Specific examples of such an alkyl group and alkenyl group include, for example, hexyl group, heptyl group, octyl group, nonyl group, decyl group, pendecyl group, dodecyl group, tridecyl group, tetradecyl group, pendecyl group Alkyl, hexadecyl, heptane decyl, octadecyl, nonadecyl, and icosyl groups (the alkyl groups may be linear or branched); hexenyl, heptenyl, Octenyl, nonenyl, decenyl, pentadecenyl, dodecenyl, tridecenyl, tetradecenyl, pendecenyl, hexadecenyl, hepdecenyl And alkenyl groups such as a senyl group, an octadecenyl group, a nonadecenyl group and an icosenyl group (these alkenyl groups may be linear or branched, and the position of the double bond is arbitrary).

In the general formulas (1) to (3), R ² represents an alkyl group having 1 to 4 carbon atoms. In terms of storage stability and the like, it is necessary that the alkyl group has 4 or less carbon atoms, preferably 3 or less carbon atoms, and more preferably 2 or less carbon atoms. In the general formulas (1) to (3), n represents an integer of 1 to 4. From the viewpoint of storage stability and the like, it is necessary to be an integer of 4 or less, preferably 3 or less, more preferably 2 or less.

In the general formula (1), X ¹ represents hydrogen, an alkyl group having 1 to 30 carbon atoms, or an alkenyl group having 1 to 30 carbon atoms. As the alkyl or alkenyl group X ¹ represents, it is necessary in view of storage stability is several 3 0 or less carbon atoms, preferably at several 2 0 or less carbon atoms, the number 1 0 carbon atoms Is more preferred. Specific examples of such an alkyl group or alkenyl group include, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group and a decyl group. Alkyl groups (these alkyl groups may be straight-chain or branched); ethenyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, etc. (These alkenyl groups may be linear or branched, and the position of the double bond is also arbitrary). Further, an alkyl group is preferable from the viewpoint of excellent sludge resistance. X ¹ is hydrogen, an alkyl group having 1 to 20 carbon atoms, or an alkenyl group having 1 to 20 carbon atoms, from the viewpoint of improving friction characteristics and improving the durability of the friction characteristics effect. It is more preferably hydrogen or an alkyl group having 1 to 20 carbon atoms, and even more preferably hydrogen or an alkyl group having 1 to 10 carbon atoms.

In the general formula (2), Y ¹ represents an alkali metal or an alkaline earth metal, and specifically includes, for example, sodium, potassium, magnesium, calcium, and the like. Among them, from the viewpoint of improving the durability of the friction characteristic effect, Lucari earth metals are preferred. In the general formula (2), m is Y ¹ is case of alkali metal represents one, if Y ¹ is Al force Li earth metals show a 2.

In the general formula (3), represents a residue obtained by removing a hydroxyl group of a dihydric or higher polyhydric alcohol. Examples of such polyhydric alcohols include, for example, ethylene glycol, propylene glycol, 1,4-butanediol, 1,2-butanediol, neopentyldaricol, 1,6-hexanediol, , 2-octanediol, 1,8-octanediol, isoprendaricol, 3-methyl-1,5-pentynediol, sorbite, force alcohol, resorcinol, hydroquinone, bisphenol A, bisphenol F, hydrogenated bis Dihydric alcohols such as phenol A, hydrogenated bisphenol F, and dimer diol; glycerin, 2- (hydroxymethyl) -1,3-propanediol, 1,2,3-butanetriol, 1,2,3- Pentantriol, 2-methyl-1,2,3-propanetriol, 2-methyl-2,3,4-butanthrol, 2 —Ethyl 1,2,3-butantriol —2,3,4-pentanetriol, 2,3,4-hexanetriol, 4-propyl —3,4,5-butanetriol, 2,4 —Dimethyl-2,3,4-pentanetriol, 1,2,4-butanetriol, 1,2,4-pentanetriol, trimethylolethane, trimethylol trihydric alcohol such as mouth bread; pen Evening erythritol, erythritol, 1,2,3,4-pentenetrol, 2,3,4,5-hexanthetrol, 1,2,4,5-pentenetrol, 1,3,4,5— Hexantetrol, diglycerin, sorbitan, etc., tetrahydric alcohols; adonitol, arabitol, xylitol, triglycerin, etc., pentahydric alcohols; dipenterylis! ^^^^^^ Hexahydric alcohols such as alcohol, mannitol, i-ditol, inositol, darcil !, evening rose, and arose; polydariserin, and dehydration condensates thereof.

In the general formula (3), m is an integer of 1 or more, m 'is an integer of 0 or more, and m + m' is the same as the valence of Z. In other words, all of the hydroxyl groups of the polyhydric alcohol of Z may be substituted, and even if only a part thereof is substituted. good.

The component (C-1) is at least one compound selected from the general formulas (1) to (3). From the viewpoint of improving the sustainability of the frictional characteristic effect, the component represented by the general formula (1) ) And (2) are preferably at least one compound selected from the group consisting of: Further, only one compound selected from the general formulas (1) to (3) may be used alone, or a mixture of two or more compounds may be used.

Preferred examples of the compound represented by the general formula (1) include N-oleoyl sarcosine wherein R ¹ is an alkenyl group having 17 carbon atoms, R ² is a methyl group, X ¹ is hydrogen, and n is 1. No.

(C-2) Ingredient:

Here, the component (C-12) is a compound represented by the following general formula (4). R ³ -CH ₂ COOH General formula (4)

R ⁴ -C ₆ H ₄ 0- (5)

(In the formula, R ⁴ represents an alkyl group having 1 to 20 carbon atoms or hydrogen.)

In the general formula (4), R ³ represents an alkyl group having 7 to 29 carbon atoms, an alkenyl group having 7 to 29 carbon atoms, or a group represented by the general formula (5). The alkyl group represented by R ³ needs to have 7 to 29 carbon atoms. From the viewpoint of solubility in a base oil, it is necessary that the carbon number is 7 or more, and it is preferable that the carbon number is 9 or more. Further, from the viewpoint of storage stability and the like, it is necessary that the number of carbon atoms is 29 or less, preferably 22 or less carbon atoms, and more preferably 19 or less carbon atoms. Specific examples of such an alkyl group include a heptyl group, an octyl group, a nonyl group, a decyl group, a pendecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pendecyl group, a hexadecyl group, Heptadecyl group, octadecyl group, nonadecyl group and the like (these alkyl groups may be linear or branched).

The alkenyl group represented by R ³ needs to have 7 to 29 carbon atoms. From the viewpoint of solubility in base oil, it is necessary that the carbon number is 7 or more, and it is preferable that the carbon number is 9 or more. Further, from the viewpoint of storage stability and the like, the number of carbon atoms needs to be 29 or less, preferably 22 or less, more preferably 19 or less. Specific examples of such an alkenyl group include, for example, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, a pendecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, and a heptadecenyl group. And octenyl decenyl group, nonadecenyl group and the like (these alkenyl groups may be linear or branched).

In the general formula (5), R ⁴ represents an alkyl group having 1 to 20 carbon atoms or hydrogen. The alkyl group represented by R ⁴ needs to have 20 or less carbon atoms from the viewpoint of storage stability and the like, preferably has 19 or less carbon atoms, and more preferably has 15 or less carbon atoms. preferable. Further, from the viewpoint of solubility in a base oil, the number of carbon atoms is preferably 3 or more, and more preferably 5 or more. In the case where R ⁴ is an alkyl group, the position of substitution is arbitrary, but is preferably in the para or meta position, and more preferably in the para position, from the viewpoint of improving the frictional effect. In the general formula (4), as described above, even if R ³ is an alkyl group having 7 to 29 carbon atoms or an alkenyl group having 7 to 29 carbon atoms, R ³ is represented by the general formula (5). The group may be a group represented by the general formula (5), but is preferably a group represented by the general formula (5) from the viewpoint of superior frictional characteristics.

(D) component: ester oily agent

An ester oil agent is added to the lubricating composition of the present invention as the component (D).

'The ester oily agent as the component (D) can be obtained by reacting an alcohol with a carboxylic acid. The alcohol may be a monohydric alcohol or a polyhydric alcohol. Further, the carboxylic acid may be a monobasic acid or a polybasic acid.

The monohydric alcohol constituting the ester oily agent usually has 1 to 2 carbon atoms. 4, preferably from 1 to 12, more preferably from 1 to 8; such alcohols may be straight-chain or branched, and may be saturated or unsaturated. It may be. Examples of the alcohol having 1 to 24 carbon atoms include, for example, methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched alcohol. Pennol, linear or branched hexanol, linear or branched hepanol, linear or branched octanol, linear or branched nonanol, linear or Branched decanol, linear or branched pendanol, linear or branched dodecanol, linear or branched tridecanol, linear or branched tetradecanol, linear Linear or branched hexadecanol, linear or branched hexadecanol, linear or branched hexadecanol, linear or branched octadecanol, linear Or branched nonadecanol, linear The branched Ikosanoru, linear or branched Henikosanoru, linear or branched Torikosanoru, such as linear or branched tetracosanol, and mixtures thereof. As the polyhydric alcohol constituting the ester oily agent, one having usually 2 to 10 valency, preferably 2 to 6 valency is used. Specific examples of the polyhydric alcohol of 2 to 10 include, for example, ethylene glycol, diethylene glycol, polyethylene glycol (3 to 15 mers of ethylene glycol), propylene glycol, dipropylene glycol, Polypropylene glycol (3- to 15-mer of propylene glycol), 1,3-propanediol, 1,2-propanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2 —Propanediol, 2 —methyl-1,3—propanediol, 1,2 —pentanediol, 1,3-pentanediol, 1,4-pentanediol, 1,5 —pentanediol, neopentyl glycol, etc. Dihydric alcohols; glycerin, polyglycerin (2 to 8 mer of glycerin such as diglycerin, triglycerin, Toragurise such as phosphorus), trimethylol alkane (trimethylol E Tan, Torimechiro trimethylolpropane, trimethylol butane, etc.) and their 2-8 mer, pen evening Erythritol and their dimers to tetramers, 1,2,4-butanetriol, 1,3,5_pentantriol, 1,2,6-hexanetriol, 1,2,3,4-butane Polyhydric alcohols such as Troll, Sorpi !, sorbitan, sorbitol glycerin condensate, aditol, arabitol, xylitol, mannitol; xylose, arabinose, report, ramnose, glucose, and fruc! ^ Sugars such as glucose, galactose, mannose, sorbose, cellobiose, mal! ^ Sugar, isomaltose, trehalose, sucrose, and mixtures thereof.

Among these polyhydric alcohols, ethylene glycol, diethylene glycol, polyethylene glycol (3 to 10 mer of ethylene glycol), propylene glycol, dipropylene glycol, and polypropylene glycol (3 to 10 mer of propylene glycol) ), 1,3-propanediol, 2-methyl-1,2-propanediol, 2-methyl-1,3-propanediol, neopentyldaricol, glycerin, diglycerin, triglycerin, trimethylolalkane (trimethylol) Ethane, trimethylol-propane, trimethylolbutane) and dimers and tetramers thereof, pentaerythryl, dipentaerythritol, 1,2,4-butanthrol, 1,3,5-pentanetriol, 1 , 2, 6—hexanetriol, 1, 2,3-, 4-butane tetrol, sorbitol, sorbitan, sorbitol glycerin condensate, aditol, arabitol, xylitol, mannii! Mixtures and the like are preferred. Still more preferably, ethylene glycol, propylene dalicol, neopentyl dalicol, glycerin, trimethylolethane, trimethylolpropane, penduris erythryl 1 ^ -yl, sorbitan, and mixtures thereof, and glycerin is particularly preferred. preferable.

The alcohol constituting the ester oily agent according to the component (D) of the present invention may be a monohydric alcohol or a polyhydric alcohol, as described above. It is preferable that In addition, among the acids constituting the ester oily agent according to the component (D) of the present invention, as the monobasic acid, a fatty acid having 1 to 24 carbon atoms is usually used, and the fatty acid may be linear or branched. And may be saturated or unsaturated. Specifically, for example, formic acid, acetic acid, propionic acid, linear or branched butanoic acid, linear or branched pentanoic acid, linear or branched hexanoic acid, linear or branched Heptanoic acid, linear or branched octanoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched pentadecanoic acid, linear Linear or branched dodecanoic acid, linear or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pendecanoic acid, linear or branched Xadecanoic acid, linear or branched heptanodecanoic acid, linear or branched octadecanoic acid, linear or branched hydroxyoctadecanoic acid, linear or branched nonadenic acid, Linear or branched icosanoic acid, linear or branched helix Saturic acid, linear or branched docosanoic acid, linear or branched trichosanoic acid, saturated fatty acid such as linear or branched tetracosanoic acid, acrylic acid, linear or branched butenoic acid, Linear or branched pentenoic acid, linear or branched hexenoic acid, linear or branched heptenic acid, linear or branched octenoic acid, linear or branched nonene Acid, linear or branched decenoic acid, linear or branched pentadecenoic acid, linear or branched dodecenoic acid, linear or branched tridecenoic acid, linear or branched tetradecene Acids, linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or branched heptadecenoic acid, linear or branched octadecenoic acid, linear Or branched hydroxyoctadecenoic acid, linear Or linear nonadecenoic acid, linear or branched icosenic acid, linear or branched henicocenoic acid, linear or branched docosenoic acid, linear or branched tricosenic acid, Examples thereof include linear or branched unsaturated fatty acids such as tetracosenoic acid, and mixtures thereof.

Examples of the polybasic acid include a dibasic enzyme and trimellitic acid, and a dibasic acid is preferred. Dibasic acids include linear dibasic acids and cyclic dibasic acids It may be a shift. In the case of a linear dibasic acid, it may be linear or branched, and may be saturated or unsaturated. As the chain dibasic acid, a chain dibasic acid having 2 to 16 carbon atoms is preferable.Specifically, for example, ethanenic acid, propane diacid, linear or branched butane diacid, straight chain Or branched pentanedioic acid, linear or branched hexanedioic acid, linear or branched heptanedioic acid, linear or branched octanedioic acid, linear or branched nonanni Acid, linear or branched decandioic acid, linear or branched pentadecanoic acid, linear or branched dodecandioic acid, linear or branched tridecandioic acid, linear Linear or branched tetradecandioic acid, linear or branched hepcanedioic diacid, linear or branched hexadecandioic acid, linear or branched hexenedioic acid, linear Or branched heptenedioic acid, straight-chain or branched octenedioic acid, straight-chain or branched Connic acid, linear or branched decenedioic acid, linear or branched pendecenedioic acid, linear or branched dodecenedioic acid, linear or branched tridecenedioic acid, linear Linear or branched heptadecenedioic acid, linear or branched hexadesenniic acid, and mixtures thereof. Examples of the cyclic dibasic acid include 1,2-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid, and aromatic dicarboxylic acid. Among these, a linear dibasic acid is preferred from the viewpoint of stability. The acid constituting the ester-based oily agent may be a monobasic acid or a polybasic acid as described above, but a monobasic acid is preferred from the viewpoint of frictional characteristics.

The combination of the alcohol and the acid in the ester-based oily agent is arbitrary and not particularly limited, and examples thereof include esters formed by the following combinations (i) to (Vii).

(i) an ester of a monohydric alcohol and a monobasic acid,

(ii) an ester of a polyhydric alcohol and a monobasic acid,

(iii) an ester of a monohydric alcohol and a polybasic acid,

(iv) esters of polyhydric alcohols and polybasic acids, (V) —hydric alcohols, mixed esters of polyhydric alcohols with polybasic acids,

(vi) mixed esters of a polyhydric alcohol with a monobasic acid, a mixture of a polybasic acid,

(v i i) A mixed ester of a mixture of a monohydric alcohol or a polyhydric alcohol with a monobasic acid or a polybasic acid.

Each of the above-mentioned esters (ii) to (Vii) may be a complete ester obtained by esterifying all of the hydroxyl groups of the polyhydric alcohol or the hydroxyl group of the polybasic acid. Alternatively, it may be a partial ester remaining as a carbonyl group.

Among the esters (i) to (Vii), the ester oily agent as the component (D) is preferably an ester of the polyhydric alcohol (ii) with a monobasic acid. This ester has a very high effect of improving the friction characteristics.

The ester (ii) may be a complete ester in which all of the hydroxyl groups of the polyhydric alcohol have been esterified, or may be a partial ester in which a part thereof remains as a hydroxyl group. Complete esters are preferred from the viewpoint of preventing precipitation, and partial esters are preferred from the viewpoint of frictional characteristics.

Further, when the ester of the above (ii) contains a partial ester, the partial ester is a mixture of two or more partial esters having different degrees of esterification from the viewpoint of anti-precipitation property, abrasion resistance and friction characteristics. More preferably, it is a mixture of a partial ester having a degree of esterification of 1 and a partial ester having a degree of esterification of 2 or more. Here, the degree of esterification means the number of ester bonds in one molecule. For example, when the polyhydric alcohol constituting the ester of the above (ii) is sorbine, the partial ester having a degree of esterification of 1 is a sorbine monoester, while the degree of esterification is 2 or more. Certain partial esters include sorbitan diesters and sorbitan triesters.

Further, the ester of the above (ii) is a partial ester having a degree of esterification of 1. When both the ester and the partial ester having a degree of esterification of 2 or more are contained, the proportion of the partial ester having a degree of esterification of 1 is preferably 10 to 70 mol%, based on the total amount of both. More preferably, it is 20 to 50 mol%. The proportion of the partial ester having a degree of esterification of 2 or more is preferably 30 to 70 mol%, more preferably 50 to 80 mol%, based on the total amount of both.

The monobasic acid constituting the ester (ii) may be either a straight-chain fatty acid or a branched fatty acid, but is preferably a straight-chain fatty acid from the viewpoint of frictional properties, For this reason, branched fatty acids are preferred.

The monobasic acid constituting the ester (ii) may be either a saturated fatty acid or an unsaturated fatty acid, but is preferably a saturated fatty acid from the viewpoint of friction characteristics and abrasion resistance. Unsaturated fatty acids are preferred for prevention. Furthermore, when the monobasic acid contains both a saturated fatty acid and an unsaturated fatty acid, the proportion of the saturated fatty acid in the total of the two is preferably at least 60 mol% from the viewpoint of frictional characteristics (particularly, reduction of friction coefficient). It is more preferably at least 75 mol%, further preferably at least 90 mol%, and still more preferably at least 95 mol%. The number of carbon atoms of the monobasic acid constituting the ester (ii) is not particularly limited, but from the viewpoint of preventing precipitation, a short-chain fatty acid having 1 to 4 carbon atoms, preferably 2 carbon atoms, and It is preferable to use a mixture of both long-chain fatty acids of 10 to 24, preferably 12 to 18 in combination. Further, when the above-mentioned short-chain fatty acid and long-chain fatty acid are combined, the proportion of the short-chain fatty acid in the total of both is preferably 50 to 80 mol%, more preferably 60 to 70 mol%. It is 5 mol%, more preferably 65 to 70 mol%.

Among the above-mentioned esters (ii), it is preferable to use the following esters (ii-11) to (ii-4) from the viewpoint that various properties such as frictional properties and precipitation prevention properties can be achieved in a well-balanced manner.

(ii-1) a monoester of a polyhydric alcohol and an unsaturated fatty acid ester, (ii-12) an ester of a polyhydric alcohol and an unsaturated fatty acid, A mixture of a partial ester having a degree of tellurization of 1 and a partial ester having a degree of esterification of 2 or more,

(ii-3) a complete ester of a polyhydric alcohol and a saturated fatty acid, wherein the constituent fatty acids comprise a mixture of short-chain fatty acids having 1 to 4 carbon atoms and long-chain fatty acids having 10 to 24 carbon atoms,

(ii-4) An ester of a polyhydric alcohol and a branched saturated fatty acid, which is a mixture of a partial ester having a degree of esterification of 1 and a partial ester having a degree of esterification of 2 or more.

The ester of the above (ii-1) is preferred in that it can achieve a high level of both the frictional properties and the anti-precipitation property. The number of carbon atoms of the unsaturated fatty acid constituting the ester (ii-11) is preferably 10 or more, more preferably 12 or more, and still more preferably 14 or more from the viewpoint of further improving the friction characteristics. It is. Further, the carbon number of the unsaturated fatty acid is preferably 28 or more, more preferably 26 or less, and further preferably 24 or less from the viewpoint of preventing precipitation. Such esters include glycerin monoolate and sorbynomonolate.

Further, the ester of (ii-12) is preferable in that all of the frictional properties, precipitation prevention properties, abrasion resistance and heat resistance can be achieved at a high level in a well-balanced manner. The polyhydric alcohol constituting the ester of (ii-2) may be one kind or a mixture of two or more kinds.If the polyhydric alcohol contains a dihydric alcohol, the trihydric or higher polyhydric alcohol is used. It is preferable to further include an alcohol.

In the above ester (ii-2), the ratio of the partial ester having a degree of esterification of 1 is based on the total amount of the partial ester having a degree of esterification of 1 and the partial ester having a degree of esterification of 2 or more. Is preferably from 10 to 70 mol%, more preferably from 20 to 50 mol%. Further, the ratio of the partial ester having a degree of esterification of 2 or more is preferably 30 to 30, based on the total amount of the partial ester having a degree of esterification of 1 and the partial ester having a degree of esterification of 2 or more. It is 70 mol%, more preferably 50 to 80 mol%. The ester of (ii-2) above may further contain a complete ester. However, from the viewpoint that all of the friction properties, precipitation prevention properties, abrasion resistance and corrosion resistance can be achieved at a high level in a well-balanced manner, the content of the complete ester is less than that of the ester of (ii-2). It is at most 10 mol%, preferably at most 5 mol%, particularly preferably substantially free of complete esters.

Esters of (ii-3) are preferred because they can achieve a high level of balance in frictional properties (particularly reduction of friction coefficient and energy saving), precipitation prevention and abrasion resistance. In the ester (ii-3), a combination of a short-chain fatty acid having 2 carbon atoms and a long-chain fatty acid having 12 to 18 carbon atoms is preferable, since the precipitation preventing property can be further improved. The proportion of short-chain fatty acids in the total amount of the constituent fatty acids is preferably 60 to 80 mol%, more preferably 60 to 75 mol%, and further preferably 65 to 70 mol%. If the proportion of short-chain fatty acids is less than 50 mol%, the solubility in base oil tends to decrease. On the other hand, when the proportion of short-chain fatty acids exceeds 80 mol%, the friction reducing effect tends to decrease. Furthermore, the proportion of saturated fatty acids in the total amount of constituent fatty acids is preferably at least 60 mol%, more preferably at least 75%, even more preferably at the point that friction characteristics (particularly reduction of friction coefficient) can be further improved. It is at least 90 mol%, more preferably at least 95 mol%. If the proportion of the saturated fatty acid is less than 60 mol%, the friction reducing effect tends to be insufficient.

Further, the ester of (ii-14) above is preferable in that all of the frictional properties, the anti-precipitation property, the abrasion resistance and the anti-corrosion property can be achieved at a high level with good balance. The polyhydric alcohol constituting the ester of (ii-4) may be one kind or a mixture of two or more kinds. It is preferable to further include a polyhydric alcohol having a valency or higher. In the above ester (ii-14), the ratio of the partial ester having a degree of esterification of 1 is based on the total amount of the partial ester having a degree of esterification of 1 and the partial ester having a degree of esterification of 2 or more. Is preferably from 10 to 70 mol%, more preferably from 20 to 50 mol%. The ratio of the partial ester having a degree of esterification of 2 or more is based on the total amount of the partial ester having a degree of esterification of 1 and the partial ester having a degree of esterification of 2 or more. Preferably it is 30-70 mol%, more preferably 50-80 mol%. The ester of (ii-14) above can further contain a complete ester, but all of the frictional properties, anti-precipitation properties, abrasion resistance and anti-scratch properties can be achieved at a high level in a well-balanced manner. Therefore, the content of the complete ester is not more than 10 mol%, preferably not more than 5 mol%, particularly preferably substantially free of the complete ester, based on the ester (ii-14).

Among the above-mentioned esters (ii-1) to (ii-4), the friction characteristics, the precipitation prevention properties and the abrasion resistance balance are better, and the heat resistance is also excellent (ii-2) The esters of (ii-3) and (ii-4) are preferred as (D-1), (D-2), and (D-3) of component (D), respectively, as follows. More preferably, the ester of (D-1) is preferred.

(D-1) a mixture of a partial ester having a degree of esterification of 1 and a partial ester having a degree of esterification of 2 or more, which is an ester of a polyhydric alcohol and an unsaturated fatty acid,

(D-2) a complete ester of a polyhydric alcohol and a saturated fatty acid, wherein the constituent fatty acids are a mixture of short-chain fatty acids having 1 to 4 carbon atoms and long-chain fatty acids having 10 to 24 carbon atoms,

(D-3) An ester of a polyhydric alcohol and a branched saturated fatty acid, which is a mixture of a partial ester having an esterification degree of 1 and a partial ester having an esterification degree of 2 or more.

The lubricating composition of the present invention is specifically suitable as a lubricating oil composition.

More specific embodiments are suitable for gear oil compositions, lubricating oil compositions for paper machines, lubricating oil compositions for sliding guide surfaces, hydraulic oils and the like.

(Embodiment of Gear Oil Composition)

More specifically, the gear oil composition is a composition in which the base oil contains at least one of the components (A), (B) and (C).

Combination of the above components (A), (B) and (C) in the gear oil composition The percentages are as follows.

The content of the phosphorus-containing carboxylic acid compound as the component (A-1) in the gear oil composition of the present invention is not particularly limited, but is preferably based on the total amount of the composition.

The content is 0.001 to 5% by mass, more preferably 0.002 to 3% by mass, and even more preferably 0.003 to 1% by mass. If the content of the phosphorus-containing carboxylic acid compound is less than the lower limit, sufficient lubricity tends not to be obtained. On the other hand, even if the content exceeds the above upper limit, the lubricity improving effect commensurate with the content tends not to be obtained, and furthermore, the thermal / oxidative stability and the hydrolytic stability may be unfavorably reduced. Among the phosphorylated carboxylic acids represented by the general formula (1), the content of the compound in which R ⁴ is a hydrogen atom (including the jS-dithiophosphorylated propionic acid represented by the general formula (6)) Is preferably 0.0

01-0. 1% by mass, more preferably 0.002 to 0.08% by mass, still more preferably 0.003 to 0.07% by mass, and still more preferably 0.004 to 0.

06% by mass, particularly preferably 0.005 to 0.05% by mass. If the content is less than 0.001, the effect of improving the extreme pressure properties may be insufficient, while if it exceeds 0.1% by mass, the thermo-oxidative stability may be reduced.

In the gear oil composition of the present invention, the content of thiophosphoric acid ester (phosphorothionate) as the component (A-2) is not particularly limited, but is usually based on the total amount of the gear oil composition (base oil and base oil). The content is 0.001 to 10% by mass, preferably 0.005 to 5% by mass, and more preferably 0.01 to 3% by mass (based on the total amount of all the additives).

The gear oil of the present invention may contain (A-1) the phosphorus-containing carboxylic acid compound or (A-2) thiophosphate alone or both.

The upper limit of the content of the dispersed viscosity index improver as the optional component (B) in the gear oil composition of the present invention is 10% by mass, preferably 5% by mass, more preferably 5% by mass, based on the total amount of the composition. Preferably it is 2% by mass. Even if the content exceeds 10% by mass, the effect of suppressing sludge generation is further improved to match the content Is not seen, and the viscosity is lowered by shearing, which is not preferable. On the other hand, the lower limit of the content of the dispersion type viscosity index improver is 0.01% by mass, preferably 0.05% by mass, and more preferably 0.1% by mass, based on the total amount of the composition. If the content of the dispersant type viscosity index improver is less than 0.01% by mass, the effect of adding the dispersant type viscosity index improver is not observed, and the effect of suppressing the formation of sludge of the gear oil composition may be deteriorated. .

The upper limit of the content of the optional component (C-11) in the gear oil of the present invention is 5% by mass, preferably 2% by mass, more preferably 1% by mass, based on the total amount of the composition. If the content exceeds 5% by mass, no further improvement in frictional properties commensurate with the content is observed, and storage stability is unfavorably reduced. On the other hand, the lower limit of the content of the component (C-11) is 0.001% by mass, preferably 0.003% by mass, more preferably 0.005% by mass, based on the total amount of the composition. It is. When the content of the component (c-1) is less than 0.001% by mass, it is not preferable because the effect of improving the friction characteristics is not obtained.

In the gear oil composition of the present invention, the content of the component (C-12) in the case of blending the component is optional. However, if the blending amount is large, the sludge resistance may decrease. It is preferably at most 1 mass%, more preferably at most 1 mass%, even more preferably at most 0.5 mass%. On the other hand, it is preferably 0.001% by mass or more, more preferably 0.003% by mass or more based on the total amount of the composition, from the viewpoint of sufficiently exhibiting the effect of improving the friction characteristics. And more preferably 0.05% by mass or more.

(Aspect of lubricating oil for paper machine)

The lubricating composition of the present invention is specifically suitable for a lubricating oil composition for a paper machine.

More specifically, the lubricating oil composition for a paper machine is a composition wherein the base oil contains at least one of the components (A), (B) and (C). The proportions of the components (A), (B) and (C) in the lubricating oil composition for a paper machine are as follows. The content of the phosphorus-containing carboxylic acid compound (A-1) in the lubricating oil composition for a paper machine of the present invention is not particularly limited, but is preferably 0.001 to 5% by mass, more preferably 0 to 0% by mass, based on the total amount of the composition. 002 to 3% by mass, more preferably 0.003 to 1% by mass. If the content of the phosphorus-containing carboxylic acid compound is less than the lower limit, sufficient lubricity tends not to be obtained. On the other hand, if the amount exceeds the upper limit, the lubricity improving effect commensurate with the content tends not to be obtained, and furthermore, the thermal and oxidative stability and the hydrolytic stability may be reduced, which is not preferable. In addition, among the phosphorylated carboxylic acids represented by the general formula (1), the content of the compound in which R ⁴ is a hydrogen atom (including i3-dithiophosphorylated propionic acid represented by the general formula (6)) Is preferably 0.001 to 0.1% by mass, more preferably 0.002 to 0.08% by mass, still more preferably 0.003 to 0.07% by mass, and still more preferably 0.004 to 0.07% by mass. It is 0.006% by mass, particularly preferably 0.005 to 0.05% by mass. If the content is less than 0.001, the effect of improving extreme pressure properties may be insufficient, while if it exceeds 0.1% by mass, the thermo-oxidative stability may be reduced. The content of thiophosphoric acid ester (phosphorothionate) (A-2) is not particularly limited, but is usually based on the total amount of the lubricating oil composition for a paper machine (based on the total amount of the base oil and all of the additives). Its content is from 0.001 to 10% by mass, preferably from 0.005 to 5% by mass, more preferably from 0.01 to 3% by mass.

The lubricating oil composition for a paper machine of the present invention may contain (A-1) the phosphorus-containing sulfonic acid compound or (A-2) phosphorothionate alone or both. it can.

The upper limit of the content of the component (B) as an optional component in the lubricating oil composition for a paper machine of the present invention and the dispersion type viscosity index improver is 10% by mass, preferably 5% by mass, based on the total amount of the composition. More preferably, it is 2% by mass. If the content exceeds 10% by mass, no further improvement in the effect of suppressing sludge generation can be seen, and the viscosity decreases due to shearing, which is not preferable. On the other hand, the lower limit of the content of the component (B) is 0.01% by mass, preferably 0.05% by mass, and more preferably 0.1% by mass, based on the total amount of the composition. (C) If the content of the component is less than 0.01% by mass, the effect of adding the component is not observed, and the effect of suppressing the sludge generation of the lubricating oil composition for a paper machine may be unfavorably deteriorated.

The upper limit of the content of the optional component (C-11) in the lubricating oil composition for a paper machine of the present invention is 5% by mass, preferably 2% by mass, more preferably 1% by mass based on the total amount of the composition. It is. If the content exceeds 5% by mass, no further improvement in frictional properties commensurate with the content is observed, and storage stability is undesirably reduced. On the other hand, the lower limit of the content of the component (C-11) is 0.001% by mass, preferably 0.003% by mass, and more preferably 0.005% by mass, based on the total amount of the composition. If the content of the component (C-1) is less than 0.001% by mass, the effect of improving the friction characteristics is not obtained, which is not preferable. No. In the lubricating oil composition for a paper machine of the present invention, the content of the component (C-12) in the case of blending the component is arbitrary, but if the blending amount is large, the sludge resistance may decrease. It is preferably 5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less based on the total amount. On the other hand, it is preferably 0.001% by mass or more, more preferably 0.003% by mass or more, based on the total amount of the composition, from the viewpoint of sufficiently exhibiting the effect of improving the frictional characteristics, It is even more preferred that the content be not less than mass%.

(Mode of lubricating oil for sliding guide surface)

The lubricating composition of the present invention is specifically suitable for a lubricating oil composition for a sliding guide surface.

More specifically, the lubricating oil composition for a sliding guide surface is a composition containing any of the above components (A), (B) and (C) in the base oil.

The proportions of the above components (A), (B) and (C) in the lubricating oil composition for sliding guide surfaces are as follows.

Although the content of the phosphorus-containing carboxylic compound (A-1) in the lubricating oil composition for a sliding guide surface of the present invention is not particularly limited, the lubricating oil composition for a sliding guide surface is not limited. It is preferably 0.001 to 5% by mass, more preferably 0.002 to 3% by mass, and still more preferably 0.003 to 1% by mass, based on the total amount of the composition. If the content of the phosphorus-containing carboxylic acid compound is less than the above lower limit, sufficient low friction properties and stick-slip prevention properties tend not to be obtained. On the other hand, even if the content exceeds the upper limit, there is a tendency that low friction property and stick-slip prevention property improvement effect commensurate with the content are not obtained, and furthermore, heat / oxidation stability and hydrolysis stability may be reduced. Not preferred. The content of the phosphorylated carboxylic acid represented by the general formula (1) in which R ⁴ is a hydrogen atom (including the 3-dithiophosphorylated propionic acid represented by the general formula (6)) Is preferably 0.001 to 0.1% by mass, more preferably 0.002 to 0.08% by mass, still more preferably 0.003 to 0.07% by mass, and still more preferably 0.004 to 0.07% by mass. 06% by mass, particularly preferably 0.005 to 0.05% by mass. If the content is less than 0.001, the effect of improving low friction and stick slip prevention may be insufficient. On the other hand, if it exceeds 0.1% by mass, thermal and oxidation stability may be reduced. There is.

The content of thiophosphoric acid ester (phosphorothionate) (A-2) is not particularly limited, but it is usually based on the total amount of the lubricating oil composition for sliding guide surfaces (based on the total amount of base oil and all additives). And its content is 0.001 to 10% by mass, preferably 0.005 to 5% by mass, and more preferably 0.01 to 3% by mass.

The lubricating oil for sliding guide surfaces of the present invention may contain the (A-1) phosphorus-containing sulfonic acid compound and / or (A-2) thiophosphate alone or in combination.

The upper limit of the content of the component (B) as an optional component in the lubricating oil composition for a sliding guide surface of the present invention is 10% by mass, preferably 5% by mass, based on the total amount of the composition. %, More preferably 2% by mass. If the content exceeds 10% by mass, it is not preferable because the frictional properties corresponding to the content and the separability from the water-soluble cutting oil are not further improved, and the viscosity is reduced by shearing. On the other hand, the lower limit of the content of the component (B) is It is 0.01% by mass, preferably 0.05% by mass, more preferably 0.1% by mass, based on the amount. When the content of the component (B) is less than 0.1% by mass, the effect of the addition is not observed, and the friction characteristics of the lubricating oil composition for a sliding guide surface and the separability from a water-soluble cutting oil are reduced. It is not preferable because it may deteriorate.

The upper limit of the content of the optional component (C-11) in the lubricating oil composition for a sliding guide surface of the present invention is 5% by mass, preferably 2% by mass, more preferably 1% by mass, based on the total amount of the composition. %. If the content exceeds 5% by mass, no further improvement in the frictional properties commensurate with the content is observed, and the storage stability is undesirably reduced.

On the other hand, the lower limit of the content of the component (C-11) is 0.001% by mass, preferably 0.003% by mass, and more preferably 0.005% by mass, based on the total amount of the composition. If the content of the component (C-1) is less than 0.001% by mass, the effect of improving the friction characteristics is not obtained, which is not preferable.

In the lubricating oil composition for a sliding guide surface of the present invention, the content of the component (C_2) when the component is compounded is optional, but if the component is added in a large amount, the sludge resistance may be reduced. It is preferably 5% by mass or less, more preferably 1% by mass or less, even more preferably 0.5% by mass or less based on the total amount. On the other hand, the amount is preferably 0.001% by mass or more, more preferably 0.003% by mass or more based on the total amount of the composition, from the viewpoint of sufficiently exhibiting the effect of improving the friction characteristics. And even more preferably 0.005% by mass or more.

(Mode of hydraulic oil)

The lubricating composition of the present invention is specifically suitable for a hydraulic oil composition. More specifically, the hydraulic oil composition is a composition containing the above component (A) and component (B) in the base oil. More specifically, the hydraulic fluid composition is more specifically a composition containing the above component (D) in the base oil.

The proportions of these components (A), (B) and (D) in the hydraulic fluid composition are as follows.

Content of Phosphorus-Containing Carboxylic Acid Compound (A-1) in the Hydraulic Fluid of the Present Invention The amount is not particularly limited, but is preferably 0.001 to 1% by mass, more preferably 0.002 to 0.5% by mass, based on the total amount of the composition. When the content of the phosphorus-containing carboxylic acid compound is less than the lower limit, the effect of improving the wear resistance and friction characteristics tends to be insufficient. On the other hand, when the content exceeds the upper limit, the sludge controllability tends to decrease. is there. In addition, among the phosphorylated carboxylic acids represented by the general formula (1), a compound in which R ⁴ is a hydrogen atom (including —dithiophosphorylated propionic acid represented by the general formula (6)) The amount is preferably from 0.001 to 0.1% by mass, more preferably from 0.002 to 0.08% by mass, even more preferably from 0.003 to 0.07% by mass, and even more preferably from 0.004 to 0.07% by mass. It is 0.006% by mass, particularly preferably 0.005 to 0.05% by mass. If the content is less than 0.001, the effect of improving the wear resistance and friction characteristics tends to be insufficient, while if it exceeds 0.1% by mass, the sludge suppressing property tends to decrease.

The content of the component (A-2) in the hydraulic fluid of the present invention is preferably 5% by mass or less, more preferably 2% by mass or less, and still more preferably 1.5% by mass or less, based on the total amount of the composition. It is. If the content exceeds 5% by mass, the thermal stability of the hydraulic fluid will be insufficient, and the sludge controllability tends to decrease. The content of the component (A-2) is preferably 0.005% by mass or more, more preferably 0.01% by mass or more, and still more preferably 0.05% by mass or more, based on the total amount of the composition. . If the content is less than 0.005% by mass, the abrasion resistance tends to be insufficient.

The hydraulic fluid of the present invention may contain (A-1) the phosphorus-containing carboxylic acid compound or (A-2) thiophosphate alone or both.

The content of the dispersed viscosity index improver (B) in the hydraulic fluid of the present invention is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably 2% by mass or less, based on the total amount of the composition. It is. Even if the content exceeds 10% by mass, no further improvement in the sludge suppression, abrasion resistance and friction properties commensurate with the content is observed, and the viscosity tends to decrease due to shearing. It is in. The content of (B) the dispersion-type viscosity index improver in the hydraulic fluid is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and further preferably, based on the total amount of the composition. 0.1% by mass or more. If the content is less than 0.01% by mass, sludge suppression, abrasion resistance or friction characteristics tend to decrease.

The content of the (D) ester oily agent in the hydraulic fluid of the present invention is optional, but is preferably 0.01% by mass or more, more preferably 0.01% by mass or more, based on the total amount of the composition, from the viewpoint of excellent friction reducing effect. Is 0.05% by mass or more, and more preferably 0.1% by mass or more. In addition, the content is preferably 10% by mass or less, more preferably 7.5% by mass or less, and still more preferably 5% by mass, based on the total amount of the composition, from the viewpoint of preventing precipitation.

When the base oil contains the above components (A) and (B) as a hydraulic oil composition, the use of a sulfur-based or phosphorus-based antiwear agent causes an increase in friction coefficient and a reduction in sludge. Therefore, the content of the sulfur-based antiwear agent and the phosphorus-based antiwear agent is preferably 5% by mass or less, more preferably 1% by mass or less, based on the total amount of the composition. , Is more preferably 0.5% by mass or less, and most preferably does not contain these antiwear agents.

Further, as described above, the hydraulic fluid composition is more specifically a composition containing the component (D) in the base oil. In this case, when a sulfur-based antiwear agent is used, the friction coefficient is reduced. Therefore, the content of the sulfur-based antiwear agent is preferably 5% by mass or less, more preferably 1% by mass or less, based on the total amount of the composition. The content is more preferably 0.5% by mass or less, and most preferably this anti-wear agent is not contained.

(Description of optional components of lubricating composition)

Next, components (E) to (K) which can be optionally contained in the lubricating composition of the present invention, in addition to the components (A) to (D), will be described below.

(E) Ingredient: In the lubricating composition of the present invention, it is preferable to use a sulfur-based extreme pressure agent as an optional component (E) from the viewpoint of improving extreme pressure properties.

Specific examples of the sulfur-based extreme pressure agent include sulfurized fats and oils, sulfurized fatty acids, ester sulfides, olefin sulfides, dihydrocarbyl (poly) sulfides, thiadazole compounds, alkyl thiolbamoyl compounds, thiocarbamate compounds, thioterpene compounds, Examples thereof include dialkylthiodipropionate compounds, sulfurized mineral oil, zinc dithiophosphate compounds, zinc dithiophosphate compounds, molybdenum dithiophosphate compounds, and molybdenum dithiophosphate compounds. One of these sulfur extreme pressure agents may be used alone, or a mixture of two or more thereof may be used.

Sulfurized fats and oils are obtained by reacting sulfur or sulfur-containing compounds with fats and oils (such as lard oil, whale oil, vegetable oil, fish oil, etc.). The sulfur content is not particularly limited, but is generally 5 to 30% by mass. Are preferred. Specific examples thereof include sulfurized lard, sulfurized rapeseed oil, sulfurized castor oil, sulfurized soybean oil, sulfurized rice bran oil, and mixtures thereof.

Examples of sulfurized fatty acids include oleic acid sulfide, and examples of sulfurized esters include unsaturated fatty acids (including oleic acid, linoleic acid, and fatty acids extracted from the above animal and vegetable fats and oils) and various alcohols. And a mixture obtained by sulfidizing an unsaturated fatty acid ester and a mixture thereof obtained by reacting with an unsaturated fatty acid ester. Specific examples thereof include methyl sulfide oleate and rice sulfide bran. Fatty acid octyl and mixtures thereof can be mentioned.

Examples of the olefin sulfide include a compound represented by the following general formula (18).

This compound is obtained by reacting an olefin having 2 to 15 carbon atoms or a dimer to a tetramer thereof with a sulfurizing agent such as sulfur or sulfur chloride. Examples of the olefin include propylene, isobutene, diisobutene and the like. preferable.

R ²⁷ -S _a -R ²⁸ (1 8)

Wherein R ²⁷ is an alkenyl group having 2 to 15 carbon atoms, and R ²⁸ is an alkenyl group having 2 to 15 carbon atoms. A represents an alkyl group or an alkenyl group, and a represents an integer of 1 to 8. Further, dihydrocarbyl (poly) sulfide is a compound represented by the following general formula (19). Here, when R ^{2 9} and R ^{3 G} is an alkyl group, sometimes referred to as vulcanization alkyl.

R ²⁹ -S _b — R ³⁰ (1 9)

[Wherein, R ²⁹ and R ^3fl may be the same or different and each is a chain alkyl group having 1 to 20 carbon atoms, a branched or cyclic alkyl group, an aryl group having 6 to 20 carbon atoms, Represents an alkylaryl group having 7 to 20 carbon atoms or an arylalkyl group having 7 to 20 carbon atoms, and b represents an integer of 1 to 8. ]

The R ^{2 9} and R ³ ° in the above general formula (1 9), specifically, n- propyl group, Isopuropiru group, n - heptyl group, Isobuchiru group, sec- butyl group, tert - butyl , Straight or branched pentyl group, straight or branched hexyl group, straight or branched heptyl group, straight or branched octyl group, straight or branched nonyl group, straight or branched decyl Group, straight or branched decyl group, straight or branched dodecyl group, straight or branched tridecyl group, straight or branched tetradecyl group, straight or branched pendecyl group, straight or branched Linear or branched alkyl group such as xadecyl group, linear or branched heptadecyl group, linear or branched octadecyl group, linear or branched nonadecyl group, linear or branched icosyl group Aryl groups such as phenyl and naphthyl groups; tolyl groups (all structures Ethenylphenyl group (including all structural isomers), linear or branched propylphenyl group (including all structural isomers), linear or branched butylphenyl group (including all structural isomers) Isomer), linear or branched pentyl fuel group (including all structural isomers), linear or branched hexylphenyl group (including all structural isomers), linear or branched Butylphenyl group (including all structural isomers), linear or branched octylphenyl group (including all structural isomers), linear or branched nonylphenyl group (including all structural isomers), linear Or a branched decylphenyl group (including all structural isomers), a linear or branched pentadecylphenyl group (including all structural isomers), a linear or branched dodecylphenyl group (including all structural isomers) Xylyl group (including Structure including isomers), Echirumechirufue of Nyl group (including all structural isomers), getylphenyl 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 Straight or branched butyl naphthyl group (including all structural isomers), dimethyl naphthyl group (including all structural isomers), ethylmethyl naphthyl group (including all structural isomers) Isomer), getylnaphthyl group (including all structural isomers), di (linear or branched) propylnaphthyl group (including all structural isomers), di (linear or branched) butylnaphthyl Base Alkylaryl groups such as (including all structural isomers); arylalkyl groups such as benzyl group, phenylethyl group (including all isomers), and phenylpropyl group (including all isomers); Can be mentioned. Among these, R ^{2 9} and R ^{3 Q} in the general formula (1 9), propylene, 1-butene or derived alkyl group having a carbon number of 3 to 8 from Isopuchiren, or the number of 6-8 carbon atoms It is preferably an aryl group, an alkylaryl group or an arylalkyl group. Examples of these groups include an isopropyl group and a branched hexyl group derived from a propylene dimer (all branched isomers include ), A branched nonyl group derived from propylene trimer (including all branched isomers), a branched dodecyl group derived from propylene tetramer (including all branched isomers) ), A branched pentadecyl group derived from propylene pentamer (including all branched isomers), a branched octadecyl group derived from propylene hexamer (including all branched S) ecMonobutyl, tert-butyl, branched octyl derived from 1-butene dimer (including all branched isomers), branched octyl derived from isobutylene dimer (Including all branched isomers), branched dodecyl group derived from 1-butene trimer (including all branched isomers), branched derived from isobutylene trimer Dodecyl group (including all branched isomers), branched hexadecyl group derived from 1-butene tetramer (including all branched isomers), and fraction derived from isobutylene tetramer branch Groups such as hexadecyl group (including all branched isomers); phenyl group, tolyl group (including all structural isomers), ethylphenyl group (including all structural isomers), and xylyl group Alkylaryl groups such as (including all structural isomers); and arylalkyl groups such as benzyl group and phenylethyl group (including all isomers).

In addition, R ²⁹ and R ³⁰ in the above general formula (19) are each independently a group having 3 to 18 carbon atoms derived from ethylene or propylene, from the viewpoint of improving machining efficiency and tool life. It is more preferably a branched alkyl group, and particularly preferably a branched alkyl group having 6 to 15 carbon atoms derived from ethylene or propylene.

Examples of the dihydrocarbyl (poly) sulfide represented by the general formula (19) include, for example, dibenzyl polysulfide, various dinonyl polysulfides, various didodecyl polysulfides, various dibutyl polysulfides, various dibutyl polysulfides, and various dibutyl polysulfides. Dioctyl polysulfide, diphenyl polysulfide, dihexyl hexyl polysulfide, and mixtures thereof are preferred.

Examples of the thiadiazole compound include 1,3,4-thiadiazole represented by the following general formula (20), 1,2,4-thiadiazole compound represented by the following general formula (21) and A 1,4,5-thiadiazol compound represented by the formula (22) is exemplified.

Equation (20)

-General formula (21)

General formula (22)

[In the formula, R ³¹ and R ³² may be the same or different and each represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and c and d may be the same or different and each represent 0 to 8 Indicates the integer of

Specific examples of such thiadiazole compounds include 2,5-bis (n-hexyldithio) 1-1,3,4-thiadiazole, 2,5-bis (n-octyldithio) -1,3,4-thiadiazole, 2,5-bis (n-nonyldithio) — 1,3,4-thiadiazole, 2,5-bis (1,1,3,3-tetramethylbutyldithio) — 1,3,4-thiadiazole, 3 , 5—Bis (n-hexyldithio) -1,2,4-thiadiazole, 3,5-bis (n-octyldithio) -1,2,4-thiadiazol, 3,5-bis (n-nonyldithio) ) — 1,2,4-thiadiazole, 3,5-bis (1,1,3,3-tetramethylbutyldithio) 1,2,4-thiadiazole, 4,5-bis (n-hexyldithio) One 1, 2, 3-thiadiazole, 4, 5-bis (n-octyldithio) -1,2,3-thiadiazol, 4,5-bis (n-nonyldithio) -1,2,3-thiadiazole, 4,5-bis (1,1,3) , 3-tetramethylbutyldithio) -1,2,3-thiazidazole and mixtures thereof.

Examples of the alkylthiolrubamoyl compound include a compound represented by the following general formula (23).

Formula (23) wherein, R ^{³ 3} ~R ³ ⁶ may be the same or different, each represents an alkyl group of 1-2 0 carbon atoms, e is an integer of 1-8. ]

Specific examples of such alkylthiol-rubamoyl compounds include bis (dimethylthiol-rubamoyl) monosulfide, bis (dibutylthiocarbamoyl) monosulfide, bis (dimethylthiocarbamoyl) disulfide, and bis (dibutylthiol-rubamoyl) Preferred are disulfide, bis (diamylthiolrubamoyl) disulfide, bis (dioctylthiolrubamoyl) disulfide and mixtures thereof.

Examples of the alkylthiocarbamate compound include a compound represented by the following general formula (24).

S _R 39

General formula (24) Wherein, R ^{3 7} to R ^{4 G} may be the same or different, each represent an alkyl group having a carbon number of 1-2 0, ^{4 1} is an alkyl group having 1 to 1 0 carbon atoms. Specific examples of such an alkylthiocarbamate compound preferably include methylenebis (dibutyldithiocarbamate) and methylenebis [di (2-ethylhexyl) dithiocarbamate].

Further, examples of the thioterpene compound include a reaction product of phosphorus pentasulfide and pinene, and examples of the dialkylthiodipropionate compound include dilauryl thiodipropionate, distearyl thiodipropionate, and a mixture thereof. be able to.

Sulfurized mineral oil refers to mineral oil in which elemental sulfur is dissolved. Here, the mineral oil used for the sulfided mineral oil according to the present invention is not particularly limited. Specifically, specifically, a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and vacuum distillation is Examples include paraffinic mineral oils and naphthenic mineral oils that have been appropriately combined with purification treatments such as solvent dewatering, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment. The simple sulfur may be in any form such as a lump, a powder, a molten liquid, and the like, but the use of a powder or a molten liquid of a simple sulfur enables efficient dissolution in the base oil. It is preferable because it can be used. Melting liquid elemental sulfur has the advantage that the melting operation can be performed in a very short time because the liquids are mixed with each other, but it must be handled at a temperature higher than the melting point of elemental sulfur. It is not always easy to handle because it requires special equipment such as the one, and is handled in a high-temperature atmosphere. In contrast, powdered elemental sulfur is particularly preferred because it is inexpensive and easy to handle, and the time required for dissolution is sufficiently short. The sulfuric acid content of the sulfided mineral oil according to the present invention is not particularly limited, but is usually preferably from 0.05 to: 0.5% by mass, more preferably 0.1% by mass, based on the total amount of the sulfided mineral oil. ~ 0.5% by mass.

Zinc dithiophosphate compound, zinc dithiophosphate compound, zinc dithiophosphate The molybdenum acid compound and the molybdenum dithiocarbamate compound are respectively represented by the following general formulas (25) to (28):

General formula (27)

General formula (28)

Expression (25) to ('28). ^{^{In, R 42, R 43, R}} 44, R 45, R 46, R 47, R 4 8, R 49, R 50, R 51, R 52, R 53, R ⁵⁴ , R ⁵⁵ , R ⁵⁶ and R ⁵⁷ may be the same or different and each represents a hydrocarbon group having 1 or more carbon atoms, and X ⁶ and X ⁷ each represent an oxygen atom or a sulfur atom]

Means a compound represented by

^{^{Wherein, R 42, R 43, R}} 44, R 45, R 46, R 47, R 48, R 49, R 50, R 51, R 52, R 53, R 54, R 55, R 56 and R ⁵⁷ Specific examples of the hydrocarbon group represented by are methyl group, ethyl group, propyl group (including all branched isomers), butyl group (including all branched isomers), pentyl group (Including all branched isomers), hexyl group (including all branched isomers), heptyl group (including all branched isomers), octyl group (including all branched isomers) Nonyl group (including all branched isomers), decyl group (including all branched isomers), pendecyl group (including all branched isomers), dodecyl group

(Including all branched isomers), tridecyl group (including all branched isomers), tetradecyl group (including all 'branched isomers), pendecyl group (including all branched isomers) Hexadecyl group (including all branched isomers), heptane decyl group (including all branched isomers), octane decyl group (including all branched isomers), nonadecyl group (Including all branched isomers), icosyl group

(Including all branched isomers), henicosyl group (including all branched isomers), docosyl group (including all branched isomers), tricosyl group (including all branched isomers) Alkyl groups such as branched isomers), tetracosyl group (including all branched isomers); cycloalkyl groups such as cyclopentyl group, cyclohexyl group, cycloheptyl group; methylcyclopentyl group (all substituted Isomer), ethylcyclopentyl group (including all substituted isomers), dimethylcyclopentyl group '(including all substituted isomers), propylcyclopentyl group (including all branched isomers and substituted isomers) Methylmethylcyclopentyl group (including all substituted isomers), trimethylcyclopentyl group (including all substituted isomers), butylcyclopentyl group (including all branched and substituted isomers) ), Methylpropylcyclopentyl group (including all branched and substituted isomers), Tyl group (including all substituted isomers), dimethylethylcyclopentyl group (including all substituted isomers), methylcyclohexyl group (including all substituted isomers), ethylcyclohexyl group (including all substituted isomers) Dimethylcyclohexyl group (including all substituted isomers), propylcyclohexyl group (including all branched and substituted isomers), methylethylcyclohexyl Group (including all substituted isomers), trimethylcyclohexyl group (including all substituted isomers), butylcyclohexyl group (including all branched isomers and substituted isomers), Xyl group (including all branched isomers and substituted isomers), acetylcyclohexyl group (including all substituted isomers), dimethylethylcyclyl Hexyl group (including all substituted isomers), methylcycloheptyl group (including all substituted isomers), ethylcycloheptyl group (including all substituted isomers), dimethylcycloheptyl group (including all Propylcycloheptyl group (including all branched and substituted isomers), methylethylcycloheptyl group (including all substituted isomers), trimethylcycloheptyl group (including all substituted isomers) Butylcycloheptyl group (including all branched and substituted isomers), methylpropylcycloheptyl group (including all branched and substituted isomers) And alkyl cycloalkyls such as getylcycloheptyl group (including all substituted isomers) and dimethylethylcycloheptyl group (including all substituted isomers) Alkyl group; phenyl group, naphthyl Aryl group such as a group; tolyl group (including all substituted isomers), xylyl group (including all substituted isomers), ethylphenyl group (including all substituted isomers), propylphenyl group (including all substituted isomers) Branch isomers, substituted isomers), methylethylphenyl group (including all substituted isomers), trimethylphenyl group (including all substituted isomers), butylphenyl group (including all branched isomers) Isomers, substituted isomers), methylpropylphenyl group (including all branched and substituted isomers), getylphenyl group (including all substituted isomers), dimethylethylphenyl group (including all Substituted isomers), pentylphenyl group (including all branched and substituted isomers), hexylphenyl group (including all branched isomers and substituted isomers) , Heptylphenyl group (including all branched and substituted isomers), octylphenyl group (including all branched and substituted isomers), noelphenyl group (including all branched and substituted isomers) ), Decylphenyl group (including all branched and substituted isomers), decylphenyl group (including all branched and substituted isomers), dodecylphenyl group (including all branched isomers) Isomers, including substituted isomers), tridecylphenyl group (including all branched and substituted isomers), tetradecylphenyl group (including all branched and substituted isomers), pencil decylphenyl Group (including all branched and substituted isomers), hexadecylphenyl group (including all branched and substituted isomers), heptadecylphenyl group (including all Alkylaryl groups such as branched isomers and substituted isomers), octyl decylphenyl group (including all branched isomers and substituted isomers); benzyl, phenethyl and phenylpropyl Groups (including all branched isomers) and arylalkyl groups such as phenylbutyl (including all branched isomers).

In the lubricating composition of the present invention, the content of the sulfur-based extreme pressure agent as the component (E) is arbitrary, but from the viewpoint of improving the extreme pressure property of the obtained lubricating composition, its lower limit is based on the total amount of the composition. The value is preferably at least 0.01% by mass, more preferably at least 0.05% by mass, even more preferably at least 0.1% by mass. In addition, even if it is mixed more, From the viewpoint that the effect is not obtained, the upper limit of the content of the sulfur extreme pressure agent is preferably 10% by mass or less, more preferably 5% by mass or less, and more preferably 3% by mass, based on the total amount of the composition. %, Still more preferably 1% by mass or less.

Component (F): epoxy compound

In the lubricating composition of the present invention, an epoxy compound can be blended as an optional component (F) from the viewpoint of controlling sludge. Epoxy compounds include the following.

(1) phenyldaricidyl ether type epoxy compound,

(2) Alkyldaricidyl ether type epoxy compound

(3) Daricidyl ester type epoxy compound

(4) aryloxy compound

(5) Alkoxylan compound

(6) Alicyclic epoxy compound

(7) Epoxidized fatty acid monoester

(8) Epoxidized vegetable oil

(1) Specific examples of the phenyldaricidyl ether type epoxy compound include phenyldaricidyl ether and alkylphenyldaricidyl ether. The alkylphenyldaricidyl ether referred to herein includes those having 1 to 3 alkyl groups having 1 to 13 carbon atoms, among which those having one alkyl group having 4 to 10 carbon atoms, for example, n-butylphenyl Daricidyl ether, i-butylphenyldaricidyl ether, sec-butylphenyldaricidyl ether, tert-butylphenyldaricidyl ether, pentylphenyldaricidyl ether, hexylphenylda U-cidylether, heptylphenyldali Preferred examples thereof include sidyl ether, octylphenyldaricidyl ether, nonylphenyldaricidyl ether, and decylphenyldaricidyl ether.

(2) Specific examples of the alkyl glycidyl ether type epoxy compound include decyl glycidyl ether, pendecyl glycidyl ether, and Sildaricidyl ether, tridecyl glycidyl ether, tetradecyl glycidyl ether, 2-ethylhexyl glycidyl ether, neopen tildaricol diglycidyl ether, trimethylolpropane triglycidyl ether, pentaerythritol tetraglycidyl ether, 1, 6 to Examples thereof include xandiol diglycidyl ether, sorbitol polydaricidi J polyester, polyalkylene glycol monoglycidyl ether, and polyalkylendalicol diglycidyl ether.

(3) As the glycidyl ester type epoxy compound, specifically, the following general formula (29):

-General formula (29)

Wherein, R ^{5 8} represents a hydrocarbon group having 1 to 1 8 carbon atoms]

The compound represented by is mentioned.

In the above formula (2 9), R ^{5 8} each represents a hydrocarbon group having 1 to 1 8 carbon atoms, such as hydrocarbon group, an alkyl group having 1 to 1 8 carbon atoms, carbon atoms 2-1 8 alkenyl groups, 5 to 7 carbon cycloalkyl groups, 6 to 18 carbon alkylcycloalkyl groups, 6 to 10 carbon aryl groups, 7 to 18 carbon alkylaryls Group, carbon number? To 18 arylalkyl groups. Of these, an alkyl group having 5 to 15 carbon atoms, an alkenyl group having 2 to 15 carbon atoms, a phenyl group, and an alkylphenyl group having an alkyl group having 1 to 4 carbon atoms are preferable.

Among the dalicidyl ester type epoxy compounds, preferred are, for example, glycidyl 2,2-dimethyloctanoate, dali Examples thereof include sidyl benzoate, glycidyl-tert-butyl benzoate, glycidyl acrylate, and glycidyl methacrylate.

(4) Specific examples of aryloxysilane compounds include 1,2-epoxystyrene and alkyl-1,2-epoxystyrene.

(5) Examples of the alkyloxysilane compound include 1,2-epoxybutane, 1,2-epoxypentane, 1,2-epoxyhexane, 1,2-epoxyheptane, and 1,2-epoxy Octane, 1,2-epoxynonane, 1,2-epoxydecane, 1,2-epoxypandecane, 1,2-epoxidedodecane, 1,2-epoxytridecane, 1,2-epoxytetradecane, 1,2 —Epoxy pen decane, 1,2-epoxy hexadenic, 1,2-epoxy hepdecane, 1,1,2-epoxy octadecane, 21-epoxy nonadecane, 1,2-epoxy icosane, etc. Can be illustrated.

(6) As the alicyclic epoxy compound, the following general formula (30):

And a compound in which the carbon atom constituting the epoxy group directly constitutes an alicyclic ring.

Specific examples of the alicyclic epoxy compound include 1,2-epoxycyclohexane, 1,2-epoxycyclopentane, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate. , Bis (3,4-epoxycyclohexylmethyl) adipate, exo-1,2 ^ "epoxynorbornane, bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate, 2- (7-oxabicyclo [ 4. 1. 0] Puteau 3-yl) -spiro (1,3-dioxane-1,5,3'-1 [7] oxabicyclo [4.1.0] heptane, 4- (1,1-methylepoxyethyl) —1,2 —Epoxy-1-methylcyclohexane, 4-epoxyethyl-1,2-epoxycyclohexane and the like.

(7) Specific examples of the epoxidized fatty acid monoester include esters of an epoxidized fatty acid having 12 to 20 carbon atoms with an alcohol or phenol having 1 to 8 carbon atoms, an alkylphenol, and the like. Particularly, butyl, hexyl, benzyl, cyclohexyl, methoxyethyl, octyl, phenyl, and butylphenyl esters of epoxy stearic acid are preferably used.

(8) Specific examples of the epoxidized vegetable oil include epoxy compounds of vegetable oils such as soybean oil, linseed oil, and cottonseed oil.

When the epoxy compound as the component (F) is blended with the lubricating composition of the present invention, the amount of the compound is not particularly limited. It is desirable to add an epoxy compound in such an amount that the content thereof is 0.1 to 5.0% by mass, more preferably 0.2 to 2.0% by mass (based on the total amount).

(G) Ingredient: Antioxidant

Although it is an optional component, the lubricating composition of the present invention contains (G) a phenolic antioxidant and (G—Β) an amine antioxidant as component (G) from the viewpoint of oxidation stability. , Or both.

As the phenolic antioxidant (G-II), any phenolic compound used as an antioxidant in lubricating oils can be used, and is not particularly limited. For example, the following general formula: One or more alkylphenol compounds selected from the compounds represented by (31) or the general formula (32) are preferred.

oc =

o

In the general formula (3 1), R ⁵⁹ R represents an alkyl group having 1 to 4 carbon atoms, R ⁶

Three

0示Re a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, R ⁶¹ is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, radicals or below represented by the following general formula (3 1-i) Represents a group represented by the general formula (31-ii).

52

R general formula (31-i)

In the general formula (31 _ i), R ⁶² is an alkylene group having 1 to 6 carbon atoms, or R ⁶³ is not an alkyl or alkenyl group of from 1 to 24 carbon, Ru.

General formula: (31—ii)

In the above general formula (31-ii), R ⁶⁴ represents an alkylene group having 1 to 6 carbon atoms, R ⁶⁵ represents an alkyl group having 1 to 4 carbon atoms, and R ⁶⁶ represents a hydrogen atom or 1 to 4 carbon atoms. Represents an alkyl group.

General formula (32) In the above general formula (32), R ⁶⁷ and R ⁷¹ each independently represent an alkyl group having 1 to 4 carbon atoms, and R ⁶⁸ and R ⁷² each independently represent a hydrogen atom or Represents an alkyl group having 1 to 4 carbon atoms; R ⁶⁹ and R ^{7 Q} each independently represent an alkylene group having 1 to 6 carbon atoms; X ⁸ represents an alkylene group having 1 to 18 carbon atoms or The group represented by the formula (32-i) is shown.

R ⁷³ -S— 7-4

-General formula (32- i)

In the above general formula (32_i), R ⁷³ and R ⁷⁴ each independently represent a carbon number

1 to 6 alkylene groups are shown.

In the general formula (31), R ⁵⁹ is, specifically, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, Ec A butyl group, a tert-butyl group and the like can be mentioned, and a tert-butyl group is preferable in terms of excellent oxidation stability. ^Examples of R ^6Q include a hydrogen atom and an alkyl group having 1 to 4 carbon atoms as described above, and a methyl group or a tert-butyl group is preferable from the viewpoint of excellent oxidation stability. —In the general formula (31), when R ⁶¹ is an alkyl group having 1 to 4 carbon atoms, specifically, as R ⁶¹ , methyl, ethyl, n-propyl, isopropyl, n-butyl Groups, isobutyl group, sec-butyl group, tert-butyl group and the like, and a methyl group or an ethyl group is preferable from the viewpoint of excellent oxidation stability.

Among the alkylphenols compound represented by the general formula (31), particularly preferred compound when R ⁶¹ is an alkyl group having a carbon number of 1 to 4, 2, 6-di - tert-butyl - p- Cresol, 2,6-di-tert-butyl-1-4-ethylphenol, and mixtures thereof.

When R ⁶¹ in the general formula (31) is a group represented by the general formula (31-i), an alkylene group having 1 to 6 carbon atoms represented by R ⁶² in the general formula (31_i) May be linear or branched. Specifically, for example, a methylene group, a methylmethylene group, an ethylene group (dimethylene group), an ethylmethylene group, a propylene group (methylethylene group), a trimethylene group, Examples thereof include a chain or branched butylene group, a straight or branched pentylene group, and a straight or branched hexylene group.

R ⁶² is an alkylene group having 1 to 2 carbon atoms, for example, a methylene group, a methyl methylene group, an ethylene group (a dimethylene group), in that the compound represented by the general formula (31) can be produced in a small number of reaction steps. ) Is more preferable.

The alkyl group or alkenyl group having 1 to 24 carbon atoms represented by R ⁶³ in the general formula (31-i) may be linear or branched. Specifically, for example, a 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, tetradecyl group, pendecyl group, hexadecyl group Alkyl, heptadecyl, octadecyl, nonadecyl, icosyl, helicosyl, docosyl, tricosyl, tetracosyl, and other alkyl groups (these alkyl groups may be linear or branched) A vinyl group, a probenyl group, an isopropenyl group, a ptenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group, a pentadecenyl group, a dodecenyl group, a tridecenyl group, a tetradecenyl group, and a pentenyl group Alkenyl groups such as decenyl group, hexadecenyl group, heptane decenyl group, octadecenyl group, octadecenyl group, nonadecenyl group, icosenyl group, henicocenyl group, docosenyl group, trichosenyl group, tetracosenyl group, etc. The groups can be straight-chain or branched; And the position of the double bond is also arbitrary).

The R ^{6 3,} from the viewpoint of excellent solubility in the base oil, an alkyl group having a carbon number of 4 to 1 8, specifically, for example, butyl group, heptyl group pentyl group, a hexyl group, Okuchiru group, nonyl Group, decyl group, pendecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptanedecyl group, octadecyl group, etc. It may be branched), preferably a straight-chain or branched alkyl group having 6 to 12 carbon atoms, and particularly preferably a branched alkyl group having 6 to 12 carbon atoms.

In the general formula (3 1) phenol compound represented by the compounds where R ^{6 1} is a group represented by the general formula (3 1 one i), in the general formula (3 1-i) R ^{6 2} is an alkylene group having 1 to 2 carbon atoms, more preferably those R ^{6 3} is a linear or branched alkyl group having 6-1 2 carbon atoms, the general formula (3 1 - i) In the formula, R 62 is preferably an alkylene group having 1 to ² carbon atoms, and R 63 is preferably a branched alkyl group having ⁶ to 12 carbon atoms.

More specifically, preferred examples of the compound include n-hexyl (3-methyl-5-tert-butyl-4-hydroxyphenyl) acetate and iso- (3-methyl-5-tert-butyl-4-hydroxyphenyl) acetate. Hexyl, (3-methyl-5-tert-butyl-4-hydroxyphenyl) acetic acid n 1-heptyl, (3-methyl-5-tert-butyl-4-hydroxyphenyl) isoheptyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) acetic acid n-methyloctyl, (3-methyl-5-) tert-butyl-4-hydroxyphenyl) isooctyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) 2-ethylhexyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) ) N-nonyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) isononyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) n-decyl acetate, (3-methyl) — 5— tert —butyl-4-hydroxyphenyl) isodecyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) n-panddecyl acetate, (3 —Methyl-5-tert-butyl-4-hydroxyphenyl) isopendecyl acetate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) n-dodecyl acetate, (3-methyl-5-tert-butyl-4-) (Hydroxyphenyl) isododecyl acetate, (3-methyl-5-tert-butyl-14-hydroxyphenyl) propionic acid n-hexyl, (3-methyl-5-tert-butyl-4-hydroxyphenyl) propionic acid Isohexyl, (3-methyl-5-tert-butyl-4-hydroxyphenyl) n-heptyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) isoheptyl propionate N-octyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl), (3-methyl-5-tert-butyl-4-hydroxyphenyl) ) Isooctyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) 2-ethylhexyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) propionic acid n-nonyl, (3-methyl-5-tert-butyl-4-hydroxyphenyl) isononyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) n-decyl propionate, (3-methyl- 5-tert-butyl-4-hydroxyphenyl) isodecyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) pro N-Pindecyl pionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) isopendecyl propionate, (3-methyl-5-tert-butyl-4-hydroxyphenyl) n-dodecyl propionate, (3-methyl) — 5— tert-butyl-4-hydroxyphenyl) isododecyl propionate, (3,5-di-tert-butyl-4-hydroxyphenyl) n-hexyl acetate, (3,5-di-tert-butyl) 4-Hydroxyphenyl) isohexyl acetate, (3,5-di-tert-butyl-4-hydroxyphenyl) n-heptyl acetate, (3,5-di-tert-butyl-4-hydroxyphenyl) iso-acetate Butyl, (3,5-di-tert-butyl-4-hydroxyphenyl) n-octyl acetate, (3,5-di-tert-butyl-4-hydroxyphenyl) isooctyl acetate 2- (3,5-di-tert-butyl-4-hydroxyphenyl) acetic acid 2-ethylhexyl acetate, (3,5-di-tert-butyl-4-hydroxyphenyl) acetic acid n-nonyl, (3,5-diphenyl) — Tert-butyl-4-hydroxyphenyl) isononyl acetate, (3,5-di-tert-butyl-4-hydroxyphenyl) n-decyl acetate, (3,5-di-tert-butyl) 4-— (Hydroxyphenyl) isodecyl acetate, (3,5-di-tert-butyl-4-hydroxyphenyl) acetate n-Pindecyl, (3,5-di-tert-butyl-4-hydroxyphenyl) Isodecyl acetate, ( 3,5-di-tert-butyl-4-hydroxyphenyl) n-dodecyl acetate, (3,5-di-tert-: tyl—4-hydroxyphenyl) isododecyl acetate, (3,5-di-tert-) Butyl-4-hydroxyphenyl) propio To n-hexyl acid, (3,5-di-tert-butyl-4-hydroxyphenyl) isohexyl propionate, (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid Butyl, (3,5-di-tert-butyl-4-hydroxyphenyl) isoheptyl propionate, (3,5-di-tert-butyl-4-hydroxyphenyl) n-octyl propionate, (3, 5-Di-tert-butyl-4-hydroxyphenyl) isooctyl propionate, (3,5-di-tert-butyl-1-hydroxyphenyl) propionate 2-ethyl Hexyl, (3,5-di-tert-butyl-4-hydroxyphenyl) n-noel propionate, (3,5-di-tert-butyl-4-hydroxyphenyl) isononyl propionate, (3,5-di- tert-butyl-1-4-hydroxyphenyl) n-decyl propionate, (3,5-di-tert-butyl-4-hydroxyphenyl) isodecyl propionate, (3,5-di-tert-butyl-4-hydroxyphenyl) N-Pindecyl propionate, isopendecyl (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, n-dodecyl (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, (3,5-di-tert-butyl 4-hydroxyphenyl) isododecyl propionate, and mixtures thereof.

When R ⁶¹ in the general formula (31) is a group represented by the general formula (31-ii), R ⁶⁴ in the general formula (31-ii) represents an alkylene group having 1 to 6 carbon atoms. ing. This alkylene group may be linear or branched, and specific examples include various alkylene groups exemplified above for R ⁶³ . R ⁶⁴ is an alkylene group having 1 to 3 carbon atoms, for example, a methylene group or a methylmethylene group, since the compound of the general formula (31) can be produced in a small number of reaction steps and the raw material is difficult to obtain. And more preferably an ethylene group (dimethylene group), an ethylmethylene group, a propylene group (methylethylene group), a trimethylene group and the like. In addition, as R ⁶⁵ in the general formula (31-ii), specifically, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group And a tert-butyl group, but a tert-butyl group is preferred because of its excellent oxidation stability. As the R ^66, there may be mentioned an alkyl group having 1 to 4 carbon atoms such as hydrogen atoms or above, from the viewpoint of excellent oxidation stability, a methyl group or tert- heptyl group.

Preferred examples of the alkylphenol compound represented by the general formula (31) when R ⁶¹ is a group represented by the general formula (31-ii) include: Bis (3,5-di-tert-butyl-4-bi) Droxyphenyl) Methane, 1,1-bis (3,5-di-tert-butyl 4-hydroxyphenyl) ethane, 1,2-bis (3,5-di_tert-tert-butyl-4-hydroxyphenyl) Ethane, 1,1-bis (3,5-di-tert-butyl-4-hydroxyphenyl) propane, 1,2-bis (3,5-di-tert-butyl-4-hydroxyphenyl) propane , 1,3-bis (3,5-di-teτt-butyl-4-hydroxyphenyl) propane, 2,2-bis (3,5-di-tert-butyl-4-hydroxyphenyl) propane, and mixtures thereof And the like.

On the other hand, in the above general formula (32), R ⁶⁷ and R ⁷¹ are each independently an alkyl group having 1 to 4 carbon atoms, specifically, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, Examples thereof include an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. From the viewpoint of excellent oxidation stability, both are preferably a tert-butyl group. R ⁶⁸ and R ⁷² each independently include a hydrogen atom or an alkyl group having 1 to 4 carbon atoms as described above, but each is independently a methyl group from the viewpoint of excellent oxidation stability. Or a tert-butyl group.

In the general formula (32), the alkylene group having 1 to 6 carbon atoms represented by the lengths ⁶⁹ and ^{17 ()} may be linear or branched. in, respectively individually include various alkylene groups mentioned above for R ^62. R ⁶⁹ and R ^{7 Q} each independently represent an alkylene group having 1 to 2 carbon atoms in that the compound represented by the general formula (32) can be produced in a small number of reaction steps and that the raw materials thereof are easily available. Specifically, for example, a methylene group, a methylmethylene group, an ethylene group (dimethylene group) and the like are more preferable.

In the general formula (32), examples of the alkylene group having 1 to 18 carbon atoms that represents X ⁸ include, for example, a methylene group, a methylmethylene group, an ethylene group (dimethylene group), an ethylmethylene group, and a propylene group. (Methylethylene group), trimethylene group, butylene group, pentylene group, hexylene group, heptylene group, octylene group, nonylene group, decylene group, pendecylene group, dodecylene group, tridecylene group, tetradecylene group, pendudecylene Group, crest Examples include a sadesylene group, a heptane decylene group, an octane decylene group, and the like (these alkylene groups may be linear or branched). Alkylene groups, specifically, for example, methylene group, methylmethylene group, ethylene group (dimethylene group), ethylmethylene group, propylene group (methylethylene group), trimethylene group, butylene group, pentylene group, hexylene group, etc. The alkylene group is more preferably linear or branched, and is more preferably ethylene group (dimethylene group), trimethylene group, linear butylene group (tetramethylene group, linear pentylene group (pentamethylene group), A linear alkylene group having 2 to 6 carbon atoms, such as a hexylene group (hexamethylene group), is particularly preferable. Ruff: £ in Nord compounds, those X ⁸ is particularly preferred as a compound when it is an alkylene group having 1 to 1 8 carbon atoms is a compound represented by the following formula (3 3).

General formula (33) When X ⁸ in the general formula (32) is a group represented by the general formula (32-i), R ⁷³ and R 73 in the general formula (32-i) an alkylene group having a carbon number of 1-6 represented by R ^{7 4} may be branched be linear, specifically, individually, various alkylene as previously described above for R ^{6 2} Bases are listed. And a raw material obtained Yasuiko in the production of the compound of the general formula ⁽³ 2), R ⁷ 3 and R ^{7 4} are each independently an alkylene group of 1-3 carbon atoms, specifically, for example, More preferred are a methylene group, a methylmethylene group, an ethylene group (a dimethylene group), an ethylmethylene group, a propylene group (a methylethylene group), and a trimethylene group. Alkyl represented by the general formula (32) In the phenol, particularly preferred as the compound when X ⁸ is a group represented by the general formula (32-i) is a compound represented by the following formula (34).

General formula (3 ^) It is a matter of course that the (G—A) component of the optional component of the present invention includes an alkylphenol compound represented by the general formula (31) or (32). One compound selected from the above may be used alone, or a mixture of two or more compounds selected from the above at an arbitrary mixing ratio may be used.

The upper limit of the (GA) component in the lubricating composition of the present invention is 3% by mass, preferably 2% by mass, more preferably 1% by mass, based on the total amount of the composition. If the content exceeds 3% by mass, the oxidation stability and the effect of suppressing sludge formation are not further improved in proportion to the content, and the solubility in the base oil is lowered. i

On the other hand, the lower limit of the content of the (GA) component is 0.01% by mass, preferably 0.1% by mass, and more preferably 0.2% by mass, based on the total amount of the composition.

When the content of the (GA) component is less than 0.01% by mass, the effect of the addition is not seen, and the oxidation stability of the gear oil composition and the effect of suppressing sludge generation may be deteriorated. Absent.

As the (G-B) amine antioxidant in the component (G) which can be added as an optional component, any amine compound used as an antioxidant in lubricating oils can be used, and is particularly limited. It is not a thing, for example, One selected from (N-p-alkyl) phenyl-naphthylamine represented by the general formula (35) or p, p'-dialkyldiphenylamine represented by the general formula (36) Alternatively, two or more aromatic amines are preferred.

In the general formula (35), R ⁷⁵ represents a hydrogen atom or an alkyl group having 1 to 16 carbon atoms.

In the general formula (36), R ⁷⁶ and R ⁷⁷ each independently represent an alkyl group having 1 to 16 carbon atoms.

In the above general formula (3'5) representing (N-p-alkyl) phenyl α-naphthylamine, R ⁷⁵ represents a hydrogen atom or a linear or branched alkyl group having 1 to 16 carbon atoms. I have. The proportion of the functional group occupying in the molecule in the case where the number of carbon atoms of R ⁷⁵ is greater than 1 6 is reduced, Ru danger of antioxidant ability is weakened. Specific examples of the alkyl group for R ⁷⁵ include a methyl group, an ethyl group, Propyl, butyl, pentyl, hexyl, heptyl, octyl, noel, decyl, pendecyl, dodeci, tridecyl, tetradecyl, pendecyl, hexadecyl, etc. The alkyl group may be linear or branched).

If R ^{7 5} Among alkyl group is represented by formula (35) compound represented by, from the viewpoint of excellent solubility of its own oxidation product to the base oil, branched 8-1 6 carbon atoms An alkyl group is preferable, and a branched alkyl group having 8 to 16 carbon atoms derived from an oligomer of a C 3 or 4 carbon olefin is more preferable. Specific examples of the olefin having 3 or 4 carbon atoms include propylene, 1-butene, 2-butene and isobutylene, which are excellent in solubility of an oxidation product of itself in a base oil. , Propylene or isoptylene is preferred.

Amine-based antioxidant (G-B) the general formula as component (3 5) represented by (N-p-alkyl) phenyl in - - the case of using Nafuchiruamin, 2 of hydrogen molecule or isobutylene as R ^{7 5} Branched octyl group derived from propylene, branched nonyl group derived from propylene trimer, branched dodecyl group derived from isobutylene trimer, branching derived from propylene tetramer A branched decyl group derived from a dodecyl group or a pentamer of propylene is particularly preferable, and a branched octyl group derived from a hydrogen molecule or a dimer of isobutylene, and a branch derived from a trimer of isobutylene. Particularly preferred are dodecyl groups or branched dodecyl groups derived from tetramers of propylene.

Aromatic Amin represented by the general formula (3 ^5), R ⁷ 5 is an alkyl group N-p-alkylphenyl - - When using a Nafuchiruamin, as the N-p-Arukirufue two Lou α- Nafuchiruamin is A commercially available product may be used. In addition, phenyl-naphthylamine and alkyl halides having 1 to 16 carbon atoms, orefins having 2 to 16 carbon atoms, or olefin oligomers having 2 to 16 carbon atoms and phenyl-α-naphthylamine can be used. It can be easily synthesized by reacting using a Friedel-Crafts catalyst. Examples of the Friedel-Crafts catalyst at this time include, for example, metal halides such as aluminum chloride, zinc chloride, and iron chloride; sulfuric acid, phosphoric acid, phosphorus pentoxide, boron fluoride, and acid clay. And an acidic catalyst such as activated clay.

On the other hand, p, p, - the general formula representing the dialkyl phenylene Ruamin (3 6) in, R ^{7 6} and R ^{7 7} are each independently represents an alkyl group having 1 to 1 6 carbon atoms. If one or both of R ^{7 6} and R ^{7 7} is a hydrogen atom can cause itself to settle as sludge by oxidation. On the other hand, when the number of carbon atoms exceeds 1 6 occupy in the molecule functional The proportion of groups may be reduced and the antioxidant capacity may be weakened.

The R ^{7 6} and R ^{7 7,} specifically, for example, a methyl group, Echiru group, propyl group, butyl group, a pentyl group, a hexyl group, a heptyl group, Okuchiru group, Roh group, decyl group, Undeshiru Group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group and the like (the alkyl group may be linear or branched). The R ^{7 6} and R ^{7 7} Among these, from the viewpoint of excellent solubility of its own oxidation product to the base oil, preferably a branched alkyl group having 3 to 6 carbon atoms, further having a carbon number 3 or 4 More preferred is a branched alkyl group having 3 to 16 carbon atoms derived from a olefin or an oligomer thereof. Examples of the C3 or C4 olefin include propylene, 1-butene, 2-butene, and isobutylene, which have excellent solubility in a lubricating base oil of an oxidation product of itself. In view of this, propylene or isobutylene is preferred.

P represented by amine-based antioxidant (G-B) the general formula as the component (3 6), p, when using the chromatography dialkyl phenylene Ruamin, as R ^{7 6} and R ^{7 7} is derived from propylene Isopropyl group, tert-butyl group derived from isobutylene, branched hexyl group derived from propylene dimer, branched octyl group derived from isobutylene dimer, derived from propylene trimer Branched noel groups derived from isobutylene trimers, branched dodecyl groups derived from propylene tetramers, etc. Or a branched pentadecyl group derived from a pentamer of propylene, particularly preferred is a tert-butyl group derived from isobutylene, a branched hexyl group derived from a dimer of propylene, or isobutylene. Branched octyl group derived from dimer, branched nonyl group derived from propylene trimer, branched dodecyl group derived from isobutylene trimer, or derived from propylene tetramer Branched dodecyl groups are particularly preferred.

Commercially available ρ, ρ'-dialkyldiphenylamine represented by the general formula (36) may be used. In addition, as in the case of Ν-ρ-alkylphenyl-α-naphthylamine represented by the general formula (35), diphenylamine and a halogenated alkyl compound having 1 to 16 carbon atoms, an olefin having 2 to 16 carbon atoms, Alternatively, it can be easily synthesized by reacting olefins having 2 to 16 carbon atoms or oligomers thereof with diphenylamine using a Friedel-Crafts catalyst. As the Friedel-Crafts catalyst at this time, specifically, for example, metal halides and acidic catalysts listed in the synthesis of Ν_ρ-alkylphenyl-α-naphthylamine are used. As a matter of course, as the optional component (G) of the present invention, one kind selected from aromatic amines represented by the general formula (35) and the general formula (36) may be used. The compound may be used alone, or a mixture of two or more compounds selected from the above at an arbitrary mixing ratio may be used.

The upper limit of the content of the (G-III) amine antioxidant in the lubricating composition of the present invention is 3% by mass, preferably 2% by mass, more preferably 1% by mass, based on the total amount of the composition. is there. If the content exceeds 3% by mass, the oxidation stability and the effect of suppressing sludge formation are not further improved in proportion to the content, and the solubility in the base oil decreases, which is not preferable. On the other hand, the lower limit of the content of the (GB) amine antioxidant is 0.01% by mass, preferably 0.1% by mass, more preferably 0.2% by mass, based on the total amount of the composition. It is. (G—B) When the content of the amine-based antioxidant is less than 0.01% by mass, the effect of adding the amine-based antioxidant is not observed, and the oxidation stability of the lubricating composition ゃ the effect of suppressing sludge formation is deteriorated. It is not preferable because it may cause Component (H): phosphorus compound

Although it is an optional component, the lubricating composition of the present invention may contain (H) a phosphorus-based compound as the component (H) for improving the extreme pressure property.

Examples of the phosphorus-based compound that can be contained herein include phosphoric acid esters such as phosphoric acid monoester, phosphoric acid diester, and phosphoric acid triester; phosphorous acid monoester, phosphorous acid diester, Phosphites such as phosphite triesters; salts of these phosphites and phosphites; and mixtures thereof. The above-mentioned phosphate esters and phosphites are usually compounds containing a hydrocarbon group having 2 to 30 carbon atoms, preferably 3 to 20 carbon atoms.

Specific examples of the hydrocarbon group having 2 to 30 carbon atoms include an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, and a decyl group. , Dodecyl, tridecyl, tetradecyl, pendecyl, hexadecyl, hepdecyl, octyldecyl and other alkyl groups (these alkyl groups may be linear or branched) ; Butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, hepdecenylenyl Alkenyl groups such as octenyl decenyl group (these alkenyl groups may be linear or branched; Position is also arbitrary); cyclopentyl group, cyclohexyl group, cycloheptyl group or other cycloalkyl group having 5 to 7 carbon atoms; methylcyclopentyl group, dimethylcyclopentyl group, methylethylcyclopentyl group, getylcyclopentyl Group, methylcyclohexyl group, dimethylcyclohexyl group, methylethylcyclohexyl group, getylcyclohexyl group, methylcycloheptyl group, dimethylcyclyl heptyl group, methylethylcycloheptyl group, getylcycloheptyl group Alkylcycloalkyl group having 6 to 11 carbon atoms (the substitution position of the alkyl group with the cycloalkyl group is also arbitrary); aryl groups such as phenyl group and naphthyl group: tolyl group, xylyl group, and ethylphenyl Group, propylphenyl group, Alkyl aryls having 7 to 18 carbon atoms such as butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonylphenyl, decylphenyl, undecylphenyl, dodecylphenyl, etc. Groups (the alkyl group may be linear or branched, and the position of substitution on the aryl group is arbitrary); benzyl group, phenylethyl group, phenylpropyl group, phenylbutyl group, phenylpentyl group, phenylhexyl group And other arylalkyl groups having 7 to 12 carbon atoms (these alkyl groups may be linear or branched).

As the phosphorus compound (H) as an optional component that may be contained, preferred examples of the compound include, for example, monopropyl phosphate, monobutyl phosphate, monopentyl phosphate, monohexyl phosphate, and monobeptyl phosphate. Monoalkyl phosphates such as monooctyl phosphate and the like (the alkyl group may be linear or branched); mono (alkyl) aryl esters of phosphate such as monophenyl phosphate and monocresyl phosphate; Dialkyl phosphates such as propyl phosphate, dibutyl phosphate, dipentyl phosphate, dihexyl phosphate, dibutyl phosphate, octyl phosphate (the alkyl group may be linear or branched); diphenyl phosphate , Phosphorus di (alkyl) aryl esters such as cresyl phosphate; trialkyl phosphates such as tripropyl phosphate, tributyl phosphate, tripentyl phosphate, trihexyl phosphate, tripeptyl phosphate, trioctyl phosphate; The alkyl group may be linear or branched); tri (alkyl) aryl esters such as triphenyl phosphate and tricresyl phosphate; monopropyl phosphite, monobutyl phosphite, monopentyl phosphite, Monoalkyl phosphites such as monohexyl phosphite, monobeptyl phosphite, and monooctyl phosphite (the alkyl group may be linear or branched); monophenyl phosphite, monocresyl phosphite Phosphorous mono (alkyl) aryl esters such as sphite; dipropyl phosphite, dibutyl phospha Dialkyl phosphites such as citrate, dipentyl phosphite, dihexyl phosphite, dibutyl phosphite, and dioctyl phosphite (an alkyl group may be linear or branched); diphenyl phosphite, Di (alkyl) aryl esters of phosphite such as dicresyl phosphite; Trialkyl phosphites such as tripyl phosphite, tributyl phosphite, tripentyl phosphite (alkyl groups are branched even if they are linear) Tris (alkyl) aryl esters such as triphenylphosphite and tricresylphosphite; and mixtures thereof.

Examples of the above-mentioned salts of the phosphoric acid esters and the phosphites include, for example, monoesters of phosphoric acid, diesters of phosphoric acid, monoesters of phosphites, diesters of phosphites, and the like. Salts, etc., in which a part or all of the remaining acidic hydrogen is neutralized by the action of a nitrogen-containing compound such as an amine compound containing only a hydrocarbon group or a hydroxyl group-containing hydrocarbon group of the formulas 1 to 8 in the molecule. Is mentioned.

Specific examples of the nitrogen-containing compound include, for example, ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine, monoheptylamine, monooctylamine, dimethylamine, methylethylamine, getylamine. , Methylpropylamine, ethylpropylamine, dipropylamine, methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, alkylamine such as dioctylamine (The alkyl group may be linear or branched); monomethanolamine, monoethanolamine, monopropanolamine, mononoamine, monopenamine , Monohexanolamine, monohepanolamine, monooctanolamine, monononanolamine, dimethanolamine, methanolethanolamine, gelanolamine, methanolpropanolamine, ethanolpropanol Lamine, dipropanolamine, methanolbutanolamine, ethanolbutanolamine, propanolbutanolamine, dibutanolamine, dipentylamine, dihexanolamine, dihexanolamine, dioctanolamine. Alkanolamines such as mines (alkanol groups may be linear or branched); and mixtures thereof.

As a matter of course, the phosphorus compound which may be contained as the component (H) is one selected from the above-mentioned phosphoric esters, phosphites, and salts thereof. May be used alone, or a mixture of two or more compounds selected from the above at an arbitrary mixing ratio may be used.

The upper limit of the content of the phosphorus compound (H component) in the lubricating composition of the present invention is 10% by mass, preferably 5% by mass, and more preferably 3% by mass, based on the total amount of the composition. . If the content exceeds 5% by mass, no further improvement in lubricity commensurate with the content is observed, and the oxidation stability is lowered, which is not preferable. On the other hand, the lower limit of the phosphorus compound content is 0.01% by mass, preferably 0.05% by mass, and more preferably 0.1% by mass, based on the total amount of the composition. When the content of the phosphorus compound is less than 0.01% by mass, the effect of the addition is difficult to exhibit.

(I) component: oily agent

Although it is an optional component, an oil agent can be added to the lubricating composition of the present invention as the component (I) from the viewpoint of improving friction characteristics.

Examples of the oil agent include ester oil agents, alcohol oil agents, carboxylic acid oil agents, ether oil agents, amine oil agents, amide oil agents, and the like. Examples of the ester oily agent include those already mentioned as the component (D).

Examples of the alcoholic oil agent include the alcohols exemplified in the description of the ester oily agent. The number of carbon atoms in the alcoholic agent is preferably 6 or more, more preferably 8 or more, and most preferably 10 or more, from the viewpoint of improving the friction characteristics. Also, if the carbon number is too large, there is a possibility that precipitation will be easy. Thus, the number of carbon atoms is preferably 24 or less, more preferably 20 or less, and most preferably 18 or less.

The carboxylic acid oil agent may be a monobasic acid or a polybasic acid. Examples of such carboxylic acids include the monobasic acids and polybasic acids exemplified in the description of the ester oil agent. Of these, monobasic acids are preferred from the viewpoint of improving the friction characteristics. The number of carbon atoms of the carboxylic acid oil agent is preferably 6 or more, more preferably 8 or more, and most preferably 10 or more, from the viewpoint of improving frictional characteristics. If the carbon number of the carboxylic acid oil agent is too large, precipitation and chewing may occur. Therefore, the carbon number is preferably 24 or less, more preferably 20 or less, and most preferably 18 or less.

Examples of the ether oil agent include etherified products of tri- to hexa-valent aliphatic polyhydric alcohols, di- or tri-molecular condensates of tri- to hexa-valent aliphatic poly-alcohols, and the like.

The etherified product of a tri- to hexa-valent aliphatic polyhydric alcohol is represented by, for example, the following general formulas (37) to (42).

General formula (37)

-Crotch type (38)

General formula (39) R ⁹ "i

General formula "0)

OR ⁹³ OR ^ OR95

, 92

CH ₂ ~ CH—— CH— CH-CH— OR 96

General formula (1)

^Wherein R ^{78 to} R ^1Q2 may be the same or different and each represents a hydrogen atom or a linear or branched alkyl group having 1 to 18 carbon atoms, an aryl group, an aralkyl group, I (R ^a 〇) „-R ^b (R ^a is an alkylene group having 2 to 6 carbon atoms, R ^b is an alkyl group having 1 to 20 carbon atoms, an aryl group, an aralkyl group, and n is an integer of 1 to 10 Represents a glycol ether residue represented by).]

Specific examples of the tri- to hexa-hydric aliphatic polyhydric alcohols include glycerin, trimethylolpropane, erythritol, penyu erythritol, arabitol, sorbitol, mannitol and the like. In the above general formulas (37) to (42): ^{77 to} R ^{1Q 1} represent a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, various pentyl groups, various hexyl groups, and various Heptyl group, various octyl groups, various nonyl groups, various decyl groups, various decyl groups, various dodecyl groups, various tridecyl groups, various tetradecyl groups, various pen decyl groups, various hexadecyl groups, various heptan decyl groups, Examples include various octadecyl groups, phenyl groups, and benzyl groups. The above-mentioned ether compounds also include partially etherified compounds in which a part of R ⁷⁷ to R ^{1 Q1} is a hydrogen atom.

Examples of the bimolecular condensate or trimolecular condensate of the tri- to hexa-valent aliphatic polyhydric alcohol include the same or different compounds represented by the above general formulas (37) to (42). And condensates. For example, the bimolecular condensate of alcohol represented by the general formula (37) and the etherified product of trimolecular condensate They are represented by general formulas (43) and (44), respectively. Further, a bimolecular condensate of an alcohol represented by the general formula (39) and an etherified product of a trimolecular condensate are represented by the general formulas (45) and (46), respectively.

General formula "3

General formula ()

General formula (5)

Formula (6) [wherein, identical to R ⁸⁸ to R ⁹¹ in R ⁷⁸ to R ^{8 G} and R ⁸⁸ to R ⁹¹ each formula (3 7) in the R ⁷⁷ to R ⁷ ⁹ and Formula (40) Here is the definition. ]

Specific examples of bimolecular condensates and trimolecular condensates of tri- to hexahydric aliphatic polyhydric alcohols include diglycerin, ditrimethylolpropane, dipentaerythritol, disorbitol, triglycerin, tritrimethylolpropane, and tripene erythritol And trisorbitol.

Specific examples of the ether oily agent represented by the general formulas (37) to (46) include trihexyl ether of glycerin, dimethyloctyl triether of glycerin, and di (methyloxyisopropylene) dodecyl triether of glycerin. Glycerin diphenyloctyl triether, glycerin di (phenyloxyisopropylene) dodecyltriether, trimethylo-tripropyl trihexyl ether, trimethylol propane dimethyl octyl triether, trimethylol propane Di (methyloxysopropylene) dodecyl triether, pentaerythritol tetrahexyl ether, Penyu erythritol trimethyloctyltetraether, Penyu erythritol tri (methyloxyisopropylene) Dodecyl tetraether, hexitol ether of sorbitol, tetramethyl octyl pen ether of sorbitol, hexitol (methyloxyisopropylene) ether of sorbitol, tetrabutyl ether of diglycerin, dibutyl ether Dimethyl octyl tetraether of glycerin, diglycerin Tri (methyloxyisopropylene) dodecyltetraether, triglycerin pentaethyl ether, triglycerin trimethyldimethylpentaether, triglycerin tetra (methyloxyisopropylene) decylpentyl ether, ditrimethylol Tetrabutyl ether of propane, dimethyldioctyltetraether of ditrimethylolpropane, tri (methyloxyisopropylene) dodecyltetraether of ditrimethylolpropane, pentaethylether of tritrimethylolpropane, tritrimethylolpropane Methyl dioctyl pen ether ether, tritrimethylolpropane tetra (methyloxyisopropylene) desylpentaether, dipentyl erythritol hexapropyl ether Tel, Kisaeteru to penta-methyl-O Cu Chi Le of dipentaerythritol, Jipen evening erythritol! Hexyl ether (methyloxyisopropylene) ether, propylene glycol ester of erythritol, erythritol of erythritol, erythritol I of erythritol I (Methyloxyisopropylene) ether, octamethyldioctylde ether of disorbitol, deca (methyloxyisopropylene) ether of disorbitol, and the like.

Among these, diphenyloctyl triether of glycerin, di (methyloxyisopropylene) dodecyl triether of trimethylolpropane, tetrahexyl ether of pentaerythritol, hexapropyl ether of sorbitol, dimethyl of diglycerin Dioctyltetraether, tetra (methyloxyisopropylene) decyl pentyl ether of triglycerin, hexapropyl ether of dipentaerythritol, and methyloctylhexaether of tripentaerythritol are preferred.

The oily agent as the component (I) that can be used in the lubricating composition of the present invention includes, in addition, (1-1) an amine oily agent and (1-2) an amide oily agent.

(1-1) Monoamine, polyamine, alkano Among them, monoamines are preferred from the viewpoint of improving the friction characteristics.

Examples of the monoamine include, for example, monomethylamine, dimethylamine, trimethylamine, monoethylamine, getylamine, triethylamine, monopropylamine (including all isomers), and dipropylamine (including all isomers). , Tripropylamine (including all isomers), monobutylamine (including all isomers), dibutylamine (including all isomers), triptylamine (including all isomers), monopentylamine (all Dipentylamine (including all isomers), dipentylamine (including all isomers), monopentylamine (including all isomers), dihexylamine (including all isomers), dihexylamine (including all isomers) Monoheptylamine (including all isomers), diheptyl Amin (including all isomers), Monooctylamine (including all isomers), Dioctylamine (including all isomers), Monononylamine (including all isomers), Monodecylamine (including all isomers) , Monoundecyl (including all isomers), monododecylamine (including all isomers), monotridecylamine (including all isomers), monotetradecylamine (including all isomers), Monopenyl decylamine (including all isomers), monohexadecylamine (including all isomers), monohepcyldecylamine (including all isomers), monooctyldecylamine (including all isomers), mono Nonadecylamine (including all isomers), Monoicosylamine (including all isomers), Monohexylamine Amin (including all isomers), Monodocosylamine (including all isomers), Monotricosylamine (including all isomers), dimethyl (ethyl) amine, dimethyl (propyl) amine (all Dimethyl (butyl) amine (including all isomers), dimethyl (pentyl) amine (including all isomers), dimethyl (hexyl) amine (including all isomers) , Dimethyl (heptyl) amine (including all isomers), dimethyl (octyl) amine (including all isomers), dimethyl (noel) amine (including all isomers), dimethyl (decyl) amine (all Isomers), dimethyl (ゥ Ndecyl) amine (including all isomers), dimethyl (dodecyl) amine (including all isomers), dimethyl (tridecyl) amine (including all isomers), dimethyl (tetradecyl) amine (all isomers) Dimethyl (hexadecyl) amine (including all isomers), dimethyl (hexadecyl) amine (including all isomers), dimethyl (hepcyldecyl) amine (including all isomers) Dimethyl (octadecyl) amine (including all isomers), dimethyl (nonadecyl) amine (including all isomers), dimethyl (icosyl) amine (including all isomers), dimethyl (hemicosyl) Alkylamines such as amine (including all isomers), dimethyl (tricosyl) amine (including all isomers) ;

Monovinylamine, divinylamine, trivinylamine, monopropenylamine (including all isomers), diprobenylamine (including all isomers), triprobenylamine (including all isomers), monobutenylamine Min

(Including all isomers), dibutenylamine (including all isomers), tributenylamine (including all isomers), monopentenylamine (including all isomers), dipentenylamine (all ), Tripentenylamine (including all isomers), monohexenylamine (including all isomers), dihexenylamine (including all isomers), monoheptenylamine (all , Diheptenylamine (including all isomers), monooctenylamine (including all isomers), dioctenylamine (including all isomers), monono Nenylamine (including all isomers), monodecenylamine (including all isomers), monoundecenyl (including all isomers), monododecenylamine (all Isomers), monotridecenylamine (including all isomers), monotetradecenylamine (including all isomers), monopendecenylamine (including all isomers), monohexadene Senilamine (including all isomers), monohepcane decenylamine (including all isomers), monooctanedecenylamine (including all isomers), mono nonadecenylamine (including all isomers), mono Icosenilamin (including all isomers), Monohenicosenilamin (including all isomers), Alkenylamines such as nodocosenylamine (including all isomers) and monotricosenylamine (including all isomers);

Dimethyl (bier) amine, dimethyl (probenyl) amine (including all isomers), dimethyl (butenyl) amine (including all isomers), dimethyl (pentenyl) amine (including all isomers) ), Dimethyl (hexenyl) amine (including all isomers), dimethyl (heptenyl) amine (including all isomers), dimethyl (octenyl) amine (including all isomers), dimethyl (nonenyl) ) Amine (including all isomers), dimethyl (decenyl) amamine (including all isomers), dimethyl (indenyl) amine (including all isomers), dimethyl (dodecenyl) amamine (including all isomers) ), Dimethyl (tridecenyl) amine (including all isomers), dimethyl (tetradecenyl) amine (including all isomers), dimethyl (Penuse decenyl) amine (including all isomers), dimethyl (hexadecenyl) amine (including all isomers), dimethyl (hepcenyldecenyl) amine (including all isomers), dimethyl (octadecenyl) ) Amine (including all isomers), dimethyl (nonadecenyl) amamine (including all isomers), dimethyl (icocenyl) amamine (including all isomers), dimethyl (henicosenyl) amamine (all isomers) Monoamines having an alkyl group and an alkenyl group such as dimethyl (tricosenyl) amine (including all isomers);

Monobenzylamine, (1-phenylethyl) amine, (2-phenylethyl) amine (alias: monophenethylamine), dibenzylamine, bis (1-1phenylethyl) amine, bis (2-phenylethylene) amine (Also known as diphenethylamine) and other aromatic substituted alkylamines;

Cycloalkylamines having 5 to 16 carbon atoms, such as monocyclopentylamine, dicyclopentylamine, tricyclopentylamine, monocyclohexylamine, dicyclohexylamine, monocycloheptylamine, dicycloheptylamine;

Alkyl groups such as dimethyl (cyclopentyl) amine, dimethyl (cyclohexyl) amine, dimethyl (cycloheptyl) amine, and cycloalkyl A monoamine having a phenyl group;

(Methylcyclopentyl) amine (including all substituted isomers), bis (methylcyclopentyl) amine (including all substituted isomers), (dimethylcyclopentyl) amine (including all substituted isomers), bis ( Dimethylcyclopentyl) amine (including all substituted isomers), (ethylcyclopentyl) amine (including all substituted isomers), bis (ethylcyclopentyl) amine (including all substituted isomers) , (Methylethylcyclopentyl) amine (including all substituted isomers), bis (methylethylcyclopentyl) amine (including all substituted isomers), (getylcyclopentyl) amine (including all substituted isomers) ), (Methylcyclohexyl) amine (including all substituted isomers), bis (methylcyclohexyl) amine (Including all substituted isomers), (dimethylmethylhexyl) amine (including all substituted isomers), bis (dimethylcyclohexyl) amine (including all substituted isomers), (ethylcyclohexyl) ) Amine (including all substituted isomers), bis (ethylcyclohexyl) amine (including all substituted isomers), (methylethylcyclohexyl) amine (including all substituted isomers), ( Getylcyclohexyl) amine (including all substituted isomers), (methylcycloheptyl) amine (including all substituted isomers), bis (methylcycloheptyl) amine (including all substituted isomers), ( Dimethylcycloheptyl) amine (including all substituted isomers), (ethylcycloheptylamine (including all substituted isomers), Alkylcycloalkylamines such as tilcycloheptyl) amine (including all substituted isomers) and (getylcycloheptyl) amine (including all substituted isomers); Also includes monoamines derived from fats and oils, such as tallow amine.

Among the above-mentioned monoamines, alkylamine, monoamine having an alkyl group and an alkenyl group, monoamine having an alkyl group and a cycloalkyl group, cycloalkylamine, and alkylcycloalkylamine are particularly preferable from the viewpoint of improving the friction characteristics. And a monoamine having an alkyl group and an alkenyl group is more preferred. W

89

The number of carbon atoms of the monoamine is not particularly limited, but is preferably 8 or more, more preferably 12 or more from the viewpoint of heat resistance. Further, from the viewpoint of improving the frictional characteristics, it is preferably 24 or less, more preferably 18 or less.

Further, the number of hydrocarbon groups bonded to the nitrogen atom in the monoamine is not particularly limited, but is preferably 1 or 2 and more preferably 1 from the viewpoint of improving the friction characteristics. .

(1-2) Amide-based oleaginous agents include fatty acids having 6 to 30 carbon atoms or their acid chlorides, and only ammonia or hydrocarbon groups having 1 to 8 carbon atoms or hydroxyl-containing hydrocarbon groups in the molecule. And amides obtained by reacting a nitrogen-containing compound such as an amine compound.

The fatty acid referred to here may be a linear fatty acid or a branched fatty acid, and may be a saturated fatty acid or an unsaturated fatty acid. The number of carbon atoms is desirably 6 to 30, preferably 9 to 24.

Specific examples of this fatty acid include heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, pendecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pendecanoic acid, hexadecanoic acid, and hepdecanoic acid. Saturated fatty acids such as octadecanoic acid, nonadecanoic acid, icosanoic acid, henicosanoic acid, docosanoic acid, tricosanoic acid, tetracosanoic acid, penchososanoic acid, hexacosanoic acid, heptacosanoic acid, octacosanoic acid, nonacosanoic acid, and triacontyl group ( These saturated fatty acids may be linear or branched); heptenoic acid, octenoic acid, nonenoic acid, decenoic acid, pendecenoic acid, dodecenoic acid, tridecenoic acid, tetradecenoic acid, pendecenoic acid, hexadecenoic acid, Evening decenoic acid, octadecenoic acid (including oleic acid), nonadecene Unsaturated fatty acids such as acid, icosenoic acid, henycosenoic acid, docosenoic acid, tricosenic acid, tetracosenoic acid, pentacosenoic acid, hexacosenoic acid, heptosecosenoic acid, octacosenoic acid, nonacosenic acid, and triacontenic acid (these unsaturated fatty acids) Fatty acids may be linear or branched, and the position of the double bond is also arbitrary.); And lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and various fats and oils. A straight chain fatty acid (eg, coconut oil fatty acid) derived from glycerol or a mixture of a straight chain fatty acid and a branched fatty acid synthesized by the oxo method or the like is preferably used. Specific examples of the nitrogen-containing compound to be reacted with the above fatty acid include ammonium; monomethylamine, monoethylamine, monopropylamine, monobtylamine, monopentylamine, monohexylamine, monoheptylamine, monooctyl. Amine, dimethylamine, methylethylamine, getylamine, methylpropylamine, ethylpropylamine, dipropylamine, methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, Alkylamines such as dihexylamine, diheptylamine, and dioctylamine (the alkyl group may be linear or branched); monomethanolamine, monoethanolamine, monopropanolamine, monobutanolamine, monopen Equinolamine, monohexanolamine, monohepanolamine, monooctanolamine, monononanolamine, dimethanolamine, methanolethanolamine, diethanolamine, methanolpropanolamine, ethanolpropanolamine, diamine Alkanolamines such as propanolamine, methanolbutanolamine, ethanolbutanolamine, propanolamine, dibutanolamine, dipentylamine, dihexanolamine, diheptanolamine, dioctanolamine, etc. The alcohol group may be linear or branched); and mixtures thereof.

Examples of the fatty acid amide include lauric amide, lauric diethanolamide, lauric monopropanolamide, myristic amide, myristic diethanolamide, myristic monopropanolamide, palmitic amide, and palmitic diethanolamide. , Palmitic acid monopropanolamide, stearic acid amide, stearic acid ester amide, stearic acid monopropanolamide, oleic acid amide, oleic acid diethanolamide, oleic acid monopropanolamide, coconut oil fatty acid amide, coconut oil fatty acid diethanolamide , Palm oil fatty acid mo Nopropanolamide, Synthetic mixed fatty acid amide having 12 to 13 carbon atoms, Synthetic mixed fatty acid diamine having 12 to 13 carbon atoms: t-Nolamide, Synthetic mixed fatty acid monopropanolamide having 12 to 13 carbon atoms, and Mixtures thereof are particularly preferably used.

Among the oil agents, preferred are polyhydric alcohol partial esters and aliphatic amides from the viewpoint of the effect of improving frictional properties.

The content of the oleaginous agent as the component (I) in the lubricating composition is arbitrary, but is preferably 0.01 based on the total amount of the lubricating composition, since the lubricating composition is excellent in the effect of improving the friction characteristics. % By mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more. In addition, the content is preferably 10% by mass or less, more preferably 7.5% by mass or less, and further preferably 5% by mass or less, based on the total amount of the composition, from the viewpoint of preventing precipitation. (J) Ingredient: Triazole and / or derivative thereof

Although it is an optional component, the lubricating composition of the present invention comprises, as a component (J), triazole and Z or a derivative thereof represented by the general formula (47) from the viewpoint of improving thermal and oxidation stability. Can be added.

General formula (H)

In the above formula, the two dashed lines represent the same or different substituents, preferably hydrocarbon groups, each substituting for a triazole ring, and both can be bonded to each other to form a cyclic group, for example, a condensed benzene ring.

Preferred compounds as triazole and / or its derivatives are benzotriazole and Z or its derivatives. As the benzotriazole, a compound represented by the following formula (48) is exemplified.

Formula (48) Examples of the benzotriazole derivative include, for example, an alkylbenzotriazole represented by the following formula (49), and an (alkyl) aminoalkylbenzotriazole represented by the following formula (50). And the like.

General formula (50) In the above formula (49), R ^1G3 represents a linear or branched alkyl group having 1 to 4 carbon atoms, preferably a methyl group or an ethyl group, and X represents 1 to 3, preferably 1 Or indicate the number 2. ^Examples of R ^1Q3 include 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 and the like. As the alkylbenzotriazole represented by the formula (49), a compound in which R ^{1 Q 3} is a methyl group or an ethyl group and X is 1 or 2 is preferable, in particular, from the viewpoint of excellent antioxidant properties. For example, methylbenzotriazole (tolyltriazole), dimethylbenzotriazole, ethylbenzotriazole, ethylmethylbenzotriazole, getylbenzotriazole or a mixture thereof can be used.

In the above formula (50), R ^1D4 represents a linear or branched alkyl group having 1 to 4 carbon atoms, preferably a methyl group or an ethyl group; R ^1Q5 represents a methylene group or an ^ethylene group; R ^1Q6 and R ^1Q7 may be the same or different, and represent a hydrogen atom or a linear or branched alkyl group having 1 to 18 carbon atoms, preferably a linear or branched alkyl group having 1 to 12 carbon atoms. It represents an alkyl group, and y represents a number of 0 to 3, preferably 0 or 1. ^Examples of ^R1G3 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. 1 ^ ^{1 (6} and 1 ^ ^{1 () 7} include, for example, separately, hydrogen atom, methyl group, ethyl group, propyl group, isopropyl group, 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, linear or branched nonyl group, Straight or branched decyl group, straight or branched decyl group, straight or branched dodecyl group, straight or branched tridecyl group, straight or branched tetradecyl group, straight or branched chain And alkyl groups such as a branched pendecyl group, a linear or branched hexadecyl group, a linear or branched hepdecyl decyl group, and a linear or branched octadecyl group.

(Alkyl) aminobenzotriazole represented by the above formula (50) R ^{1 G 4} is a methyl group, y is 0 or 1, R ^{1 Q 5} is a methylene group or an ethylene group, and R ^{1 Q 6} and R ¹ ^{1 Q 7} is linear or branched dialkyl Ruaminoarukiru base emission zone is an alkyl group of Bok Riazor Ya dialkylaminoalkyl Bok Lil Toriazoru, and mixtures thereof of number 1-1 2 carbon atoms are preferably used. These alkylaminoalkylbenzotriazoles include, for example, dimethylaminomethylbenzotriazole, getylaminomethylbenzotriazole, di (linear or branched) propylaminomethylbenzotriazole, Di (straight chain X is branched) butylaminomethylbenzotriazole, di (linear or branched) pentylaminomethylbenzotriazole, di (linear or branched) hexyl aminomethylbenzotriazole, di ( Heptylaminomethylbenzotriazole, di (linear or branched) octylaminomethylbenzotriazole, di (linear or branched) nonylaminomethylbenzotriazole, di (linear) Chain or branched) decylaminomethylbenzotriazole, di (straight chain or branched) pendecylamino Tylbenzotriazole, di (linear or branched) dodecylaminomethylbenzotriazole; dimethylaminoethyl benzotriazole, getylaminoethylbenzotriazole, di (linear or branched) propylaminoethylbenzol Liazol, di (linear or branched) butylaminoethylbenzotriazole, di (linear or branched) pentaminoaminoethylbenzotriazole, di (linear or branched) hexylaminoethylbenzo Triazole, di (linear or branched) heptylaminoethylbenzotriazole, di (linear or branched) octylaminoethylbenzotriazole, di (linear or branched) nonylaminoethylbenzotriazole, di (linear Or branched) decylaminoethylbenzotriazole, di (linear or branched) Ndecylaminoethylbenzotriazole, di (linear or branched) dodecylaminoethylbenzotriazole; dimethylaminomethyltolyltriazole, getylaminomethyltolyltriazole, di (linear or branched) propylaminomethyltolyltria Sol, di (linear or branched) butylaminomethyltolyltriazole, di (linear or branched) pentylami Nomethyltolyltriazole, di (linear or branched) hexylaminomethyltolyltriazole, di (linear or branched) heptylaminomethyltolyltriazole, di (linear or branched) Cutylaminomethyltolyltriazole, di (linear or branched) Nonylaminomethyltolyltriazole, di (linear or branched) Decylaminomethyltolyltriazole, di (linear or branched) ゥDecylaminomethyltolyltriazole, di (linear or branched) dodecylaminomethyltolyltriazole; dimethylaminoethyltolyltriazole, dimethylaminoethyltolyltriazole, di (linear or branched) ) Propylaminoethyltolyltriazole, di (linear or branched) butylaminoethyltolyltriazole, di (linear or branched) pen Tylaminoethyltritolyltriazole, di (linear or branched) hexylaminoethyltolyltriazole, di (linear or branched) heptylaminoethyltolyltriazole, di (linear or branched) octylamino Ethyltolyltriazole, di (linear or branched) nonylaminoethyltolyltriazole, di (linear or branched) decylaminoethyl tolyltriazole, di (linear or branched) ゥAnd decylaminoethyltolyltriazole, di (linear or branched) dodecylaminoethyltolyltriazole; or a mixture thereof. The content of triazole and / or its derivative (J), which is an optional component in the lubricating composition, is optional, but is preferably 0.01% by mass or more, based on the total amount of the composition. More preferably, it is 0.05% by mass or more. If the content is less than 0.01% by mass, the effect of improving the thermo-oxidative stability due to the inclusion of triazole and Z or a derivative thereof may be insufficient. The content of triazole and / or a derivative thereof is preferably 1.0% by mass or less, more preferably 0.5% by mass or less, based on the total amount of the composition. If it exceeds 1.0% by mass, the effect of improving the thermal and oxidative stability corresponding to the content may not be obtained, which may be economically disadvantageous.

Other optional ingredients (K):

In the lubricating composition of the present invention, for the purpose of further improving its performance, a rust inhibitor, a metal deactivator, and a dispersion of the component (B) may be further added, if necessary. Various additives typified by a viscosity index improver other than the mold viscosity index improver, a detergent / dispersant, a pour point depressant, an antifoaming agent and the like may be contained alone or in combination of plural kinds.

Specific examples of the rust inhibitor include metal soaps such as fatty acid metal salts, lanolin fatty acid metal salts, and oxidized wax metal salts; polyhydric alcohol partial esters such as sorbin fatty acid esters; and esters such as lanolin fatty acid esters. Sulfonates such as calcium sulfonate and vacuum sulfonate; oxidized wax; amines; phosphoric acid; and phosphates. In the present invention, one or two or more compounds arbitrarily selected from these rust inhibitors can be contained in an arbitrary amount, but usually, the content is determined by the lubricating composition. Desirably, it is 0.01 to 1% by mass based on the total amount of the substance.

Specific examples of the metal deactivator include imidazole compounds and the like in addition to the benzotriazole compounds mentioned as the component (J). In the present invention, one or two or more compounds arbitrarily selected from these metal deactivators can be contained in an arbitrary amount. Desirably, it is 0.001-1% by mass based on the total amount of the lubricating composition.

As the viscosity index improver other than the dispersion type viscosity index improver as the component (B), specifically, a copolymer of one or more monomers selected from various methacrylates or a water copolymer thereof is used. Additive, ethylene-α-olefin copolymer (examples of olefin include propylene, 1-butene, 1-pentene, etc.) or hydrogenated products thereof, polyisobutylene or hydrogenated products thereof, styrene-hydrogenated copolymers So-called non-dispersion type viscosity index improvers such as polymers and polyalkylstyrenes can be exemplified. Examples of the detergent and dispersant other than the dispersion type viscosity index improver (C) include alkenyl octanoic acid imide, sulfonate, salicylate, and phenate. One or two or more compounds selected arbitrarily from among these viscosity index improvers and detergent dispersants can be contained in an arbitrary amount. The content thereof is desirably 0.01 to 10% by mass based on the total amount of the lubricating composition.

Specific examples of the pour point depressant include a copolymer of one or more monomers selected from various acrylates and methacrylates or a hydrogenated product thereof. One or more compounds selected arbitrarily from among these pour point depressants can be contained in an arbitrary amount, but the content is usually 0 based on the total amount of the lubricating composition. 0.1 to 5% by mass is desirable.

Specific examples of the antifoaming agent include silicones such as dimethyl silicone and fluorosilicone. In the present invention, one or more compounds arbitrarily selected from these defoaming agents can be contained in an arbitrary amount. It is desirably 0.0001 to 0.05 mass% based on the total amount of the substance.

Uses:

The lubricating composition of the present invention is suitable for a gear oil composition, a lubricating oil composition for a paper machine, a lubricating oil composition for a sliding guide surface (sliding surface), etc., for various industrial machines, vehicles, It is used for railway vehicles, etc., but it can also be used as hydraulic oil, e.g., bottle oil, compressor oil, bearing oil, etc., especially as hydraulic oil.

As a hydraulic fluid, it is more effective when used as a hydraulic fluid for hydraulic equipment such as injection molding machines, machine tools, construction machinery, steelmaking equipment, industrial pots, and hydraulic elevators. Industrial applicability

The composition of the present invention is useful as a lubricating composition for industrial machinery and equipment, and in particular, any of the mineral oils, fats and oils, synthetic oils and mixed oils of the present invention as base oils. The lubricating composition for industrial machinery and equipment containing the component (A), the component (B) or the component (C) is a gear oil composition, a lubricating oil composition for a paper machine or a slip guide surface. It is useful as a lubricating oil composition for use. Further, any one selected from the mineral oils, fats and oils, synthetic oils and mixed oils thereof of the present invention is used as a base oil, and the following (A) component (A-1) a phosphorus-containing carboxylic acid compound and / or A— 2) Lubricity for industrial machinery and equipment containing a thiophosphate and a dispersant viscosity index improver as component (B), or instead of ester oily agent as component (D) The composition is useful as a lubricant, especially as a hydraulic fluid.

(A) Ingredient:

(A-1) a phosphorus-containing carboxylic acid compound and Z or (A-2) thiophosphate,

Component (B): Dispersion type viscosity index improver

(C) Ingredient:

The following (C-1) component and Z or (C-2) component:

R ¹ — CO— NR ² — (CH ₂ ), -COOX ¹ (1)

(Wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, R ² is an alkyl group having 1 to 4 carbon atoms, X ¹ is hydrogen, and 1 to 30 carbon atoms. An alkyl group or an alkenyl group having 1 to 30 carbon atoms, and n represents an integer of 1 to 4.)

[R 1 — CO— NR 2-(CH ₂ ) _n — COO] (2) (wherein, R ^{1 is} an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, and R ² is 1 carbon atom. To 4 alkyl groups, Y ¹ is an alkali metal or an alkaline earth metal, n is an integer of 1 to 4, and m is ¹ when Y ¹ is an alkali metal, and 2 when Y ¹ is an alkaline earth metal.)

[R ¹ — CO— NR ² — (CH ₂ ) _n — COO] _ffl — Z— (OH) (3) (wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkenyl having 6 to 30 carbon atoms) R, R ² is an alkyl group having 1 to 4 carbon atoms, Z is a residue of a dihydric or higher polyhydric alcohol excluding the hydroxyl group, m is an integer of 1 or more, m 'is an integer of 0 or more, m + m 'Is the valence of Z, and n is an integer from 1 to 4.

Component (C-1): a compound represented by the following general formula (4) R ³ -CH ₂ COOH General formula (4)

(In the formula, R ³ is an alkyl group having 7 to 29 carbon atoms, an alkenyl group having 7 to 29 carbon atoms, or a group represented by the general formula (5).)

R ⁴ —C ₆ H ₄ 0-(5) (wherein, R ⁴ represents an alkyl group having 1 to 20 carbon atoms or hydrogen)

(D) Component: Ester oily agent.

[Example]

Next, the present invention will be described more specifically with reference to examples. The gear oil, the lubricating oil for paper machine, the lubricating oil for the sliding guide surface, and the hydraulic oil, which are specific embodiments of the lubricating composition of the present invention, will be described in this order with separate examples. .

"Gear oil composition 1 1 J

This embodiment is an embodiment of a gear oil obtained by blending the component (C-11), the component (C-2), or a mixture thereof with the base oil.

The types and amounts of the base oils tested and the additives added thereto are shown below. In addition, the test methods performed on the blended lubricating oil compositions are also shown below. The test results obtained are summarized in Tables 1 to 3.

(I AE oil temperature)

Based on the IAE gear test specified in IP 166/77 (92), the operation was performed at a rotation speed of 6000 rpm, an oil amount of 1250 ml, a load of 80 lb, and the oil temperature of the gear box was measured after 120 minutes.

(Timgen test)

According to JIS K2519, the 0K load of each lubricating oil composition was measured. (Base oil)

Base oil 1: Solvent-refined paraffinic mineral oil (kinematic viscosity 150 mm ² / s (40 ° C), viscosity index 95)

Base oil 2: 1-decene oligomer (kinematic viscosity 150 min ² / s (at 40), viscosity index 1 40) Base oil 3: Polyol ester obtained using a mixture of pentaerythritol and dipentaerythritol and a linear saturated fatty acid having 5 to 12 carbon atoms

(Kinematic viscosity 15 OmmVs (40 ° C), viscosity index 120)

(Additive)

(C-1) Ingredient

C-1-1: N-oleoyl sarcosine

(C-2) Ingredient

C-2-1: Noelphenoxyacetic acid

(E) Ingredient

E 1: 2,5-bis (n-nonyldithio) -1,3,4-thiadiazole E 2: Zinc dioctyldithiophosphate (ZnDTP)

Other additives

Amin: Dioctyldiphenylamine

D B P C: g t er t butyl-p-cresol

TCP: Tricresyl phosphate

[Effect of Embodiment of Gear Oil Composition 1-1]

The gear oil composition of this embodiment is excellent in energy saving. Therefore, in response to gear units used in various types of high-efficiency, low-cost industrial machines, the use of high-speed and high-output gear oils will enable more energy-saving operation.

Example 1 2 3 4 5 Base oil 1 99.19 98.17 98.99 98.15 98.85 2

Three

Additive

C-one component C-1-1 C-1-1. C-1-1 C-1-1

0.01 0.01 0.02 0.02

C-two components C-2-1 C-2-1

0.03 0.03

E component E 1 E 1

0.2 0.3

1

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives

IAE oil temperature (° C) 1 30 1 34 .123 1 27 1 20 Timken 0K load 1 5 24 55 1 5 45 (lb)

[Table 2]

Example 6 7 Base oil

2 98.85 ―

3 ― 98.85 Additive

C-one component C-1-1 C-1-1

0.02 0.02

C-two components C-2-1 C-2-1

0.03 0.03

E component E 1 E 1

0.3 0.3

DBPC 0.5 0.5 Amin 0.3 0.3 Other additives

IAE oil temperature () 1 30 1 1 9 Timken 0K load 35 50

(lb)

Ho 3]

Experimental example 1 2 3 4 Base oil 1 99.2 98.2 98.7 99.0 2

Three

Additive

C—one component

C—two components

E component E 2 E 1

0.5 0.2

DBPC 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 Other additives TCP

1.0

IAE oil temperature (.C) Due to baking 1 59 1 5 5 1 5 1

Stop

Timken OK load Not tested Not tested Not tested Not tested Weight (lb)

"Gear oil composition 1"

This example is an example of an embodiment relating to a gear oil in which the base oil is blended with the dispersion type viscosity index improver of the component (B).

The types and amounts of the base oils tested and the additives added thereto are shown below. In addition, the test methods performed for each blended lubricating oil composition are also shown below.

The test results obtained are summarized in Tables 1 to 3.

(FZG)

The FZG test was performed according to ASTM D 5182—91 to evaluate the extreme pressure properties of each lubricating oil composition. At the time of evaluation, failed stages were used as indicators.

(Thermal stability test)

JS K2540—Evaluation of the effect of lubricating oil on the suppression of sludge formation was conducted in accordance with 1989 “Test Method for Thermal Stability of Lubricating Oil”. That is, 45 g of the lubricating oil shown in the table was placed in a 50 ml beaker, copper and iron catalysts were put therein, and the mixture was allowed to stand in an air bath at 140 ° C. for 240 hours, and the amount of sludge in the sample oil was measured. The amount of sludge generated was determined by diluting the lubricating oil after the test with n-hexane, filtering through a 0.8 / m membrane filter, and measuring the weight of the collected matter. The copper and iron catalysts used in the turbine oil oxidation stability test (JIS K2514) were cut into 8 rolls (about 3.5 cm in length). (I AE oil temperature)

Based on the IAE gear test specified in IP 166/77 (92), the operation was performed at a rotation speed of 6000 rpm, an oil amount of 125 OmK, and a load of 80 lb, and the oil temperature of the gear box was measured after 120 minutes.

(Demulsification test)

According to JISK 2520, the demulsifying property at 82 was measured.

(Base oil)

Base oil 1: solvent refined paraffinic mineral oil (kinematic viscosity 15 OmmVs (40), viscosity index 95), Base oil 2: 1-decene oligomer (kinematic viscosity: 150 mm ² / s (40 ° C), viscosity index: 140),

Base oil 3: polyol ester obtained by using a mixture of pentaerythritol and dipentaerythritol and a linear saturated fatty acid having 5 to 12 carbon atoms (kinematic viscosity: 150 mmVs (40 ° C), viscosity index: 120 ),

(Additive)

(B) Ingredient

B 1: Copolymer of C18 alkyl methacrylate (90 mol%) and morpholinoethyl methacrylate (10 mol%) (number average molecular weight 80,000),

B 2: Copolymer of C18 C18 alkyl methacrylate (90 mol%) and benzoylaminomethacrylate (10 mol%) (number average molecular weight 70,000).

(C-1) Ingredient

C-1-1: N-oleoyl sarcosine

(C-1) ingredient

C—2-1—Nonylphenoxyacetic acid (NPA)

(E) Ingredient

E1: 2,5-bis (n-nonyldithio) 1-1,3,4-thiadiazole; E2: zinc dioctyldithiophosphate (ZnDTP).

Other additives:

Amin: Dioctyldiphenylamine,

DB PC: di-te r t butyl-p-cresol,

TCP: tricresyl phosphate,

OAP: Georail acid phosphate,

Imide: Monotype polybutenyl succinimide obtained by the reaction of polybutenyl succinic anhydride with tetraethylene penamine.

[Effect According to Embodiment of Gear Oil Composition 1-2]

The gear oil composition of this embodiment is excellent in sludge resistance and water separation. Therefore, in response to gear units used in various types of high-efficiency, low-cost industrial machinery, gear oils are more resistant to higher temperatures, combined with the trend toward higher speeds and higher power. It is possible to withstand operation at a higher load.

1]

Example 1 2 3 4 5 Base oil 1 96.1 98.5 99.09 98.97 98.89 2

Three

B component B 1 B 2 B 1 B 2 B 1

0.1 0.2 0.1 0.2 0.1

C-one component C-1-1 C-1-1

0.01 0.01

C-two components C-2-1

0.03

E component E 1

0.2

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other accessories TCP OAP

Additive 3.0 0.5

FZG test 10 10 10 10> 12

—Ji

Sludge amount 1.8 1.5 1.2 0.7 1.5 (mg / 45g)

IAE Oil temperature 141 139 128 131 125 CO

Demulsification 40-40-0 40-40-0 40-40-0 40-40-0 40-40-0

(15) (15) (20) (20) (20) [Table 2]

Example 6 7 8 9 Base oil 1 98.95 98.65 ― ―

2 ― 1 98.65 ―

3-1 98.65 Additives

B component B 2 B 2 B 2 B 2

0.2 0.2 0.2 0.2

C-1 component C-1-1 C-1-1 C-1-1 C-1-1

0.02 0.02 0.02 0.02

C— 2 components C-2-1 C-2-1 C-2-1 C-2-1

0.03 0.03 0.03 0.03

E component ― E 1 E 1 E 1

0.3 0.3 0.3

DBPC 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 Other additives ― ― ― ―

FZG test failure 1 0> 1 2> 1 2> 1 2 rating stage

Thermal stability test 1.2 1.8 0.7 2.1 Slurry amount

(mg / 45g)

IAE oil temperature (° C) 1 2 7 1 2 5 1 2 9 1 1 9 Demulsifying properties 40-40-0 (20) 40-40-0 (20) 40-40-0 (15) 41-38- 1 (30) 3]

Experimental example 1 2 3 4 5 6 Base oil 1 96.2 95.9 98.7 98.4 99.0 98.7 2

Three

Additive

B component 1-1 1-1

C-1 1 component 1--1 1 1

C-1 two-component---

E component E 2 E 2 E 1 E 1

0.5 0.5 0.2 0.2

DBPC 0.5 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 0.3 Other additives T C P T C P Imide Imide Additive 3.0 3.0 0.3 0,3 Imide

0.3

FZG test failure 1 0 1 0 9 9 1 0 1 0

The

Thermal stability test 10.8 2.5 15.2 3.4 6.8 1.9 Test sludge

Amount (mg / 45g)

IAE Oil temperature Not tested Not tested Not tested Not tested Formula test "Vi 'Not tested C) No

Demulsification Not tested 18-21-41 Not tested 21-23-36 Tested 31-25-24

(60) (60) No (60) "Gear oil composition I 3"

This embodiment is directed to a gear oil obtained by blending the base oil with a phosphorus-containing carboxylic acid compound of the component (A-1), a thiophosphate of the component (A-2), or a mixture thereof. This is an example.

The types and amounts of the flower oils tested and the additives added thereto are shown below. In addition, the test methods performed on the blended lubricating oil compositions are also shown below. The obtained test results are summarized in Tables 1 to 5.

(FZG)

FZG tests were performed in accordance with ASTM D 5182-91 to evaluate the extreme pressure properties of each lubricating oil composition. In the evaluation, the failed stage was used as an index.

(Thermal stability test)

JI S K2540—Evaluation of the effect of lubricating oil on the suppression of sludge formation was conducted in accordance with the 1989 “Lubricant Thermal Stability Test”. That is, 45 g of the lubricating oil described in the table was placed in a 50 ml beaker, copper and iron catalysts were placed therein, and the mixture was allowed to stand in a 140 ° C air bath for 240 hours, and then the amount of sludge in the sample oil was measured. The amount of generated sludge was determined by diluting the lubricating oil after the test with n-hexane, filtering through a 0.8 μm membrane filter, and measuring the weight of the collected matter. The copper and iron catalysts used in the turbine oil oxidation stability test (JIS K2514) were cut into 8 rolls (about 3.5 cm in length).

(I AE oil temperature)

In accordance with the IAE gear test specified in IP 166/77 (92), operation was performed at a rotation speed of 600 Orpm, an oil amount of 125 Oml, and a load of 80 l, and the oil temperature of the gear box was measured after 120 minutes.

(Timken test)

The 0K load of each lubricating oil composition was measured according to JIS K2519. (Base oil)

Base oil 1: Solvent refined paraffinic mineral oil (Kinematic viscosity 150mmVs (40 ° C), viscosity index (Number 95),

Base oil 2: 1-decene oligomer (kinematic viscosity 15 OmmVs (40 ^ :), viscosity index 140),

Base oil 3: Polyol ester obtained using a mixture of pentaerythritol and dipentyl erythritol and a straight-chain saturated fatty acid having 5 to 12 carbon atoms

(Kinematic viscosity 150 negation ^{2 / s (40 ° C)} , viscosity index 120).

(Additive)

(A— 1) Ingredient

A—1-1—1: jS dithiophosphorylated propionic acid,

A-1-2: / 3 dithiophosphorylated ethyl propionate.

(A-2) Ingredient

A-2-1: Triphenylphosphorothionate.

(B) Ingredient

B 2: Copolymer of C1-C18 alkyl methacrylate (90 mol¾) and benzoylamino methacrylate (10 mol%) (number average molecular weight 70,000).

(C-1) Ingredient

C-1-1: N-oleoyl sarcosine,

(C-2) ingredient

C-2-1: Nonylphenoxyacetic acid.

(E) Ingredient

E1: 2,5-bis (n-nonyldithio) -1,3,4-thiadiazole; E2: zinc dioctyldithiophosphate (ZnDTP).

Other additives

Amin: Dioctyldiphenylamine,

DB PC: di-tert-butyl-p-cresol,

TCP: tricresyl phosphate.

[Effect of Embodiment of Gear Oil Composition 13] The gear oil composition of this embodiment is excellent in sludge resistance performance and extreme pressure resistance. Therefore, in response to gear units used in various types of high-efficiency, low-cost industrial machinery, gear oils are used at higher speeds and with higher power output, so they can withstand higher temperatures and operate at higher loads. It is possible to endure.

1]

Example 1 2 3 4 5 Base oil 1 99.18 99.0 99.0 99.0 98.9 2

3 ― ― ― ― ― Additive

A— 1 component A-1-1 A-1-2 — A-1-2 A-1-2

0.02 0.2 0.1 0.2

A-2 components A-2-1 A-2-1

0.2 0.1

B component B1

0.1

C—one component

C-1 1 1 1

C-1 two components

C-1 2— 1

E component E 1 1 1 1 1 1 1

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives

FZG test failed> 1 2> 1 2> 12> 1 2> 1 2 stage

Thermal stability test 5.4 4.3 3.2 5.8 0.8 Radius

(mg / 5)

IAE oil temperature (° C) 145 140 1 38 1 35 1 1 Timgen OK load 21 (lb) 24 (lb) 24 (lb) 30 (lb) 24 (lb) [Table 2]

Example 6 7 8 9 10 Base oil 1 98.98 98.75 99.07 98.77 98.87

2 ― ― ― ― ―

3 ― ― ― ― ― Additive

A— 1 component A-1-1 A-1-2 A-1-1 A-1-2 A-1-1

0.02 0.2 0.02 0.1 0.02

A— 2 components A-2-1 A-2-1

0.05 0.1

B component B2 B1 B1 B2 B1

0.2 0.2 0.1 0.2 0.1

C-one component C-1-1 C-1-1

0.01? P 0.01

C-1 two components

―

E component E 1

― 0.2

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives ―

FZG test failure> 1 2> 12> 1 2> 1 2> 1 2

Thermal stability test 1.0 1.0 1.2 0.7 1.5

(mg / 5g)

IAE oil temperature (° C) 143 140 1 28 13 1 1 25 Timken 0K load 21 (lb) 40 (lb) 24 (lb) 35 (lb) 55 (lb) 3]

Example 1 1 12 1 3 14 15 Base oil 1 98.75 98.45

2 ― 1 99.18 98.63 1

3 ― ― 11 99.0 Additives

A-1 component A-1-2 A-1-2 A-1-1 A-1-1 A-1-2

0.1 0.1 0.02 0.02 0.1

A— 2 components A-2-1 A-2-1 1 A-1

0.1 0.1 0.1

B component B2 B2 one B2 one

0.2 0.2 0.2

C—one component C-1-1 C-1-1 one C-1-1 one

0.02 0.02 0.02

C-two components C-2-1 C-2-1 one C-2-1 one

0.03 0.03 0.03

E component one E1 one E1 one

0.3 0.3

Hidden C 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives

FZG test failure> 1 2> 12> 1 2> 1 2> 1 2 stage

Thermal stability test 1.1 1.6 1.2 0.7 0.8

(mg / 45g)

IAE oil temperature C) 129 123 1 28 1 3 1 1 32 Timken 0K load 21 (lb) 60 (lb) 24 (lb) 35 (lb) 30 (lb) [Table 4]

Example 16 Base oil 11

2 one

3 98.45 Additives

A—one component A-1-2

0.1

A—two components A-2-1

0.1

B component B2

0.2

C-1 component C-1-1

C-1 1 1 1 0.02

C—two components C-2-1

C-1 2-1 0.03

E component E1

E 1 0.3 Shield C 0.5 Amin 0.3 Other additives

FZG test failure status> 1 page

Thermal stability test sludge amount 1.6 mg / mg

IAE oil temperature (° C) 1 2 1 Timgen 0K load 60 (lb) [Table 5]

Experimental example 1 2 3 4 Base oil 1 99.2 98.2 98.7 99.0 2

Three

Additive

A— 1 ingredient

A—two components—one one one

B component-one

C—one component

C-one two-component-one-one-one

E component E2 E1

0.5 0.2

DBPC 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 Other additives TCP

1.0 ―

FZG test failed 4 8 9 1 0 Stage

Thermal stability test formula Expression ^ 5.2 15.2 6.8 Radius

(mg / 5g)

IAE oil temperature (° C) No test No test No test No B test-^ Timken OK load No test No test No test No test `` Lubricating oil composition for paper machine 11

The present example is an example of an embodiment relating to a lubricating oil for a paper machine in which the component (C-1), the component (C-12) or a mixture thereof is blended with the base oil. Hereinafter, the embodiment will be further described with reference to examples.

(Test method)

(Wear resistance: F ALEX wear test)

In the F ALEX abrasion test, the amount of abrasion was measured using a tester specified in ASTM D3233-93 "Standard Test Methods ior Measurement of Extreme Pressure Properties oi Fluid Lubricants (Falex Pin Vee Block Methods)". The pin (journal) is made of steel with an outer diameter of 6.35 mm (IX 4 inches) and a length of 3.1.7 mm (1.1 times 4 inches). The V-shaped block has an angle of 96 degrees. Steel was used. The test conditions were a rotation speed of 100 rpm, a Direct Load of 1 001 bs, and a test time of 10 hours.

(Thermal stability test)

The effect of lubricating oil on the formation of sludge was evaluated according to JIS K2 540-1 989, “Test method for thermal stability of lubricating oil”. That is, 45 g of the lubricating oil shown in the table was placed in a 50 ml peaker, copper and iron catalysts were put therein, left in a thermostat at 150 ° C. for 120 hours, and the amount of sludge in the sample oil was measured. The amount of sludge generated was determined by diluting the lubricating oil after the test with n-hexane, filtering through a 0.8 am membrane filter, and measuring the weight of the collected matter. The copper and iron catalysts used were those obtained by cutting the catalyst used in the tarpin oil oxidation stability test (JIS K2 514) into eight volumes (about 3.5 cm in length). (Anti-corrosion: Stop test)

(4) The stopping test was carried out using the test method specified in JISK 2510 “Testing method for anti-rust performance of lubricating oil” which was improved for evaluating the anti-corrosion property of lubricating oil for paper machines. The difference is that when evaluating ordinary lubricating oils, distilled water or artificial seawater However, when evaluating lubricating oil for paper machines, artificial white water was used instead.

(Base oil)

Base oil 1: solvent refined paraffinic mineral oil (kinematic viscosity 22 OmmVs (40 ° C), viscosity index 95),

Base Oil 2: 1-decene oligomer (kinematic viscosity 220 negation ² / s (40 ° C), viscosity index 1 40),

Base oil 3: Polyol ester obtained using a mixture of pentaerythritol and dipentaerythritol and a linear saturated fatty acid having 5 to 12 carbon atoms (kinematic viscosity: 220 mm ² / s (40), viscosity index: 120).

(Additive)

(C-1) Ingredient

C-1-1: N-oleoyl sarcosine.

(C-1) ingredient

C—2-1—Nonylphenoxyacetic acid (NPA).

(E) Ingredient

E1: 2,5-bis (n-nonyldithio) 1-1,3,4-thiadiazol; E2: zinc dioctyldithiophosphate (ZnDTP).

Other additives

DB PC: di-tert-butyl-p-cresol,

Amin: Dioctyldiphenylamine,

TCP: tricresyl phosphate.

[Effect of Embodiment of Lubricating Oil Composition for Paper Machine 1-1]

The lubricating oil composition for a paper machine of the present embodiment is excellent in heat resistance, abrasion resistance and corrosion resistance at the same time. Therefore, it is a lubricating oil composition for making paper that can respond to the recent development of paper machines. 1]

Example 1 2 3 4 5 Base oil 1 99.19 98.17 98.99 99.15 98.85 2

Three

Additive

C-1 component C-1-1 ^: C-1-1 C-1-1 C-1-1

0.01 0.01 0.02 0.02

C- component C-2-1 ^: C-2-1 C-2-1

0.03 0.03 0.03

E component. E 1 E 1

0.2 one 0.3

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives ― 11 ― ―

FALEX Wear 5.7 4.9 1.5 2.3 0.8 (mg)

Thermal stability test 6.5 5.9 7.9 4.8 7.1 Ludge amount, mg)

Anti-rust performance No rust No rust No rust No rust No rust

2]

Example 6 7 Base oil 11-

2 98.85 ―

3 98.85 Additives

C-1 component C-1-1 C-1-1

0.02 0.02

C-2 component C-2-1 C-2-1

0.03 0.03

E component E 1 E 1

0.3 0.3

DBPC 0.5 0.5 Amin 0.3 0.3 Other additives

FALEX Wear 1.0 0.7

(mg)

Thermal stability test 7.4 5.8 Ludge amount mg)

Anti-rust performance Rust-free Rust-free

[3]

Experimental example 1 2 3 4 Base oil 1 99.2 98.2 98.7 99.0 2

3 1--1 Additives

C-1 component

C-2 component

E component ¹ ¹ E 2 E 1

0.5 0.2

DBPC 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 Other additives TCP ¹

1.0

FALEX Wear 22.9 8.1 9.3 7.5 (mg)

Thermal stability test 54.5 5.2 22.3 9.8 Ludge amount (mg)

Anti-rust performance Rusted Rusted Rusted Rusted

(Altitude) (Altitude) (Altitude) (Altitude)

`` Lubricating oil composition for paper machine-1 ''

The present example is an example of an embodiment relating to a lubricating oil for a paper machine in which a dispersion viscosity index improver of component (B) is blended with the base oil.

Hereinafter, the embodiment will be further described with reference to examples.

(Test method)

'' (Wear resistance: F ALEX wear test)

In the F ALEX abrasion test, the amount of abrasion was measured using a tester specified in ASTM D 3 2 3 3 9 3 "Standard Test Methods ior Measurement of Extreme Pressure Properties oi Flui Lubricants (Falex Pin Vee Block Methods)". The pin (journal) is made of steel with an outer diameter of 6.35 mm (1/4 inch) and a length of 3.1.75 mm (1 · 14 inch). Steel was used. Test conditions were as follows: rotation speed 1 000 rpm, Direct Load 100 lbs, test time 16 hours.

(Thermal stability test)

The effect of lubricating oil on the formation of sludge was evaluated in accordance with JIS K2540—1989, “Test method for thermal stability of lubricating oil”. That is, 45 g of the lubricating oil shown in the table was placed in a 50 ml beaker, copper and iron catalysts were put therein, left in a thermostatic oven of 150 T for 120 hours, and the amount of sludge in the sample oil was measured. The amount of sludge produced was determined by diluting the lubricating oil after the test with η-hexane, filtering through a 0.8 mm membrane filter, and measuring the weight of the collected matter. The copper and iron catalysts used in the turbine oil oxidation stability test (JIS K2 514) were cut into 8 rolls (about 3.5 cm in length). (Anti-corrosion: Stop test)

(4) The stopping test was conducted using the test method specified in JISK 2510 “Testing method for anti-corrosion performance of lubricating oil” which was modified for evaluating the anti-corrosion property of lubricating oil for paper machines. The difference is that when evaluating ordinary lubricating oils, distilled water or artificial seawater However, when evaluating lubricating oil for paper machines, artificial white water was used instead.

(Demulsification test)

According to JIS K 2520, the demulsifying property was measured at 82. However, artificial white water was used instead of distilled water.

(Base oil)

Base oil 1: Solvent refined paraffinic mineral oil (kinematic viscosity 220 Vs (40 ° C), viscosity index 95),

Base oil 2: 1-decene oligomer (kinematic viscosity 220 mm ² / s (40), viscosity index 140),

Base oil 3: Polyol ester obtained using a mixture of pentaerythritol and dipentyl erythritol and a linear saturated fatty acid having 5 to 12 carbon atoms

(Kinematic viscosity 220 mm ² / s (40), viscosity index 120).

(Additive)

(B) Ingredient

B 1: Copolymer of C 1 -C 18 alkyl methacrylate (9 OHIO) and morpholinoethyl methacrylate (10 mol%) (number average molecular weight 80,000),

B 2: Copolymer of C1-C18 alkyl methacrylate (90 ol¾) and benzoylamino methacrylate (10 mol%) (number average molecular weight 70,000),

(C-1) ingredient

C-1-1: N-oleoyl sarcosine,

(C-2) ingredient

C—2-1—Nonylphenoxyacetic acid (NPA)

(E) Ingredient

E 1: 2,5-bis (n-nonyldithio) -1,3,4-thiadiazole; E 2: zinc dioctyldithiophosphate (ZnDTP).

Other additives

DBPC: di-tert-butyl-p-cresol,

Amin: Dioctyldiphenylamine, TCP: tricresyl phosphate,

O A P: Ziorail acid phosphate,

[Effect of Embodiment of Lubricating Oil Composition for Paper Machine 1-2]

The lubricating oil composition for a paper machine of the present embodiment has excellent heat resistance, abrasion resistance and corrosion resistance at the same time. Therefore, it is a lubricating oil composition for making paper that can respond to the recent development of paper machines.

[table 1]

Example 1 2 3 4 5 Base oil 1 96.1 98.5 99.09 98.97 98.89 2

Three

B: Dispersed polymer B1 B2 B 1 B2 Bl

0.1 0.2 0.1 0.2 0.1

C-1: Sarcosine ― 'One C-1-1 C-l-1

0.01 0.01

C-2: N P A one

E: Sulfur-based extreme pressure agent-El

0.2 Hidden C 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives TCP 0AP

3.0 0.5 ―

FALEX Wear 8.7 6.5 4.8 3.9 2.1 (mg)

Thermal stability test 2.2 3.1 1.5 1.0 1.8

(mg / 5g)

Anti-rust performance 錡 None No mackerel 鲭 None 鲭 None 鲭 None Demulsification 40-40-0 40-40-0

(20) (25) 2]

Example 6 7 8 9

Base oil 1 98.95 98.65

2 ― 1 98.65 ―

3-1 98.65 Additives

B: Dispersion polymer B2 B2 B2 B2

― 0.2 0.2 0.2. 0.2

C-1: Sarkossi C-1-1 C-1-1 C-1-1 C-1-1 0.02 0.02 0.02 0.02

C-2: NP A C-2-1 C-2-1 C-2-1 C-2-1

0.03 0.03 0.03 0.03

E: Sulfur-based extreme pressure E1 E1 E1 agent 0.3 0.3 0.3

DBPC 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 Other additives

Agent

FALEX Wear 2.5 2.8 1.9 2.0

(mg)

Thermal stability test 1.0 1.5 0.9 1.9 Slurry amount

(mg / 5g)

Anti-rust performance 性能 None 鲭 None 錡 None 鲭 None Demulsification 40-40-0 (25) 40-40-0 (25) 40-40-0 (15) 41-38-1 (35) Ho 3]

Experimental example 1 2 3 4 5 6 Base oil 1 96.2 95.9 98.7 98.4 99.0 98.7 2

Three

Additive

B: Dispersed polymer------

C-1: Sarcosine-one----

C-2: NPA-one-one--

E: Sulfur-based extreme pressure agent ZnDTZnDTF1F1

P P 0.2 0.2

0.5 0.5

DBPC 0.5 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 0.3 Other additives TCP TCP Imide Imide

3.0 3.0 0.3 0.3 imide

0.3

FALEX Wear 8.3 9.1 17.1 19.5 14.4 15.7 (mg)

Thermal stability test 12.5 3.1 21.8 4.5 12.1 3.9 Radius

(mg / 5g)

Rust prevention performance Yes (High Yes (High Yes (High Yes (High Yes (High presence or absence of high mackerel) Degree) Degree) Degree) Degree) Degree Emulsification 16-23-41 Tested Tested 25- 28-27

Without (60) without (60) `` Lubricating oil composition for paper machine-1 ''

The present embodiment relates to a lubricating oil for a paper machine obtained by blending the base oil with a phosphorus-containing carboxylic acid compound of the component (A-1), a thiophosphate of the component (A-12), or a mixture thereof. It is an example of an embodiment.

The embodiment will be described below with reference to examples.

The types and amounts of the base oils tested and the additives added thereto are shown below. In addition, the test methods performed for each lubricating oil composition thus formulated are also shown below. The test results obtained are summarized in Tables 1 to 5.

(Test method) ''

(Wear resistance: FALEX wear test)

In the FAL EX wear test, the amount of abrasion was measured using a tester specified in ASTM D 3 2 3 3 9 3 "Standard Test Methods ior Measurement of Extreme Pressure Properties of Fluid Lubricants (Falex Pin Vee Block Methods)" . The pin (journal) is made of steel with an outer diameter of 6.35 mm (1/4 inch) and a length of 3.1.75 mm (1/1/4 inch). The angle of the V-type block is 96 mm. Degree steel was used. The test conditions were a rotation speed of 100 rpm, a Direct Load of 100 lb's, and a test time of 16 hours.

(Thermal stability test)

The effect of lubricating oil on controlling sludge formation was evaluated in accordance with JISK2 540—19989, “Test method for thermal stability of lubricating oil”. That is, place 45 g of the lubricating oil in the table in a 50 ml beaker, put copper and iron catalysts into it, leave it in a 150 ° C air oven for 120 hours, and then determine the amount of sludge in the sample oil. Was measured. The amount of sludge formed was determined by diluting the lubricating oil after the test with n-hexane, filtering through a 0.8-zm membrane filter, and measuring the weight of the collected matter. The copper and iron catalysts used in the turbine oil oxidation stability test (JIS K2 514) were cut into 8 rolls (about 3.5 cm in length). (Anti-corrosion: Stop test)

鲭 The stopping test is a test method improved from the test specified in JISK 2510 “Lubricant rust prevention performance test method” for evaluating the anti-corrosion properties of lubricating oil for paper machines. went. The difference is that distilled water or artificial seawater is used when evaluating ordinary lubricating oils, but when evaluating lubricating oils for paper machines, artificial white water was used instead of these, and the test time was set to 2 hours.

(Base oil)

Base oil 2: 1-decene oligomer (kinematic viscosity 220 mm ² / s (40 ° C), viscosity index 140),

Base Oil 3: Pen evening erythritol and Jipen evening mixture and the polyol ester obtained by using a linear saturated fatty acid having 5 to 12 carbon atoms erythritol (kinematic viscosity 220 negation ^{2 / s (40 ° C)} , viscosity index 120 ).

(Additive)

(A— 1) Ingredient

A— 1-1—1: j3 dithiophosphorylated propionic acid,

A— 1-2: | 8 Dithiophosphorylated ethyl propionate.

(A-2) Ingredient

A—2—1: Triphenylphosphorothionate

(B) Ingredient

B 2: Copolymer of C1-C18 alkyl methacrylate (90mol¾) and benzoylaminomethacrylate (10mol%) (number average molecular weight 70,000).

(C-1) ingredient

C-1-1: N-oleoyl sarcosine

(C-1) ingredient

C-2-1: Nonylphenoxyacetic acid (NPA)

(E) Ingredient

E1: 2,5—bis (n-nonyldithio) -1,3,4-thiadiazol; E2: zinc dioctyldithiophosphate (ZnDTP). Other additives:

Amin: Dioctyldiphenylamine,

DBPC: di-tertbutyl-p-cresol,

TCP: tricresyl phosphate.

[Effects of Embodiment 3 of Lubricating Oil Composition for Paper Machine 13]

[¾ 1]

Example 1 2 3 4 5 Base oil 1 99.18 99.0 99.0 99.0 98.9 2

Three

Additive

A-1 component A-1-1 A-1-2 A-1-2 A-1-2

0.02 0.2 0.1 0.2

A-2 component ^: A-2-1 A-2-1 '

0.2 0.1

B component B1

0.1

C-1 component 1 ― ― 1 1

C-2 component 1 ― ― 1 _

E component 1 ― ― _ 1

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives-----

FALEX Wear 3.2 4.1 5.4 2.8 3.9 (mg)

Thermal stability test 4.9 5.1 3.8 5.7 0.5

(mg / 45g

Anti-rust performance 鲭 None 鲭 None 錡 None 鑌 None 鲭 None [Table 2]

Example 6 7 8 9 10 Base oil 1 98.98 98.75 99.07 98.77 98.87 2

3 ― ― ― ― ― Additive

A-1 component A-1-1 A-1-2 A-1-1 A-1-2 A-1-1

0.02 0.2 0.02 0.1 0.02

A-2 component A-2-1 A-2-1

0.05 0.1

B component B2 B1 B 1 B 2 B 1

0.2 0.2 0.1 0.2 0.1

C-1 component C-1-1 C-1-1

0.01 0.01

C-2 component C-2-1

0.03

E component E 1

0.2

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives ―

FALEX Wear 3.5 3.1 2.1 2.0 0.9 (mg

Thermal stability test 1.2 0.9 1.1 0.5 1.8

(mg / 45g)

Stopping performance 鲭 None 鲭 None 鲭 None 鲭 None 鲭 None [Table 3]

Example 1 1 1 2 1 3 1 4 1 5 Base oil 1 98.75 98.45 ― 11

2 ― 1 99.18 98.63 1

3-1 11 1 99.0 Additives

A-1 component A-1-2 A-1-2 A-1-1 A-1-1 A-1-2

0.1 0.1 0.02 0.02 0.1

A-2 component A-2-1 A-2-1 ― I A-2-1

0.1 0.1 0.1

B component B 2 B 2 1 B 2 1

0.2 0.2 0.2

C-1 component C-1-1 C-1-1 one C-1-1 one

0.02 0.02 0.02

C-2 component C-2-1 C-2-1 ― C-2-1 ―

0.03 0.03 0.03

E component one E 1 one E 1 ―

0.3 0.3

DBPC 0.5 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 0.3 Other additives

FALEX Wear 1.0 0.5 4.6 1.5 3.4

, Mg)

Thermal stability test slurry 0.9 1.1 2.2 0.5 1.8 Weight (mg / 45g)

Anti-rust performance 鲭 None 鲭 None 鲭 None 鲭 None 鲭 None [Table 4]

Example 16 Base oil 11

2 ―

3 98.45 Additives

A-1 component A-1-2

0.1

A-2 component A-2-1

0.1

B component '' B 2

0.2

C-1 component C-1-1

0.02

C-2 component C-2-1

0.03

E component E 1

0.3

DBPC 0.5 Amin 0.3 Other additives ―

(FALEX wear amount (mg) 0.9 Thermal stability test sludge 1.2 Amount, mg / 45g)

Anti-rust performance No rust [Table 5]

Experimental example 1 2 3 4 Base oil 1 99.2 98.2 98.7 99.0

2 —

3 — additive

A-1 component

A-2 component ― _ 11

B component one _ one ―

C-1 component-

C-2 component ― _ 11

E component-one E 2 E 1

0.5 0.2

DBPC 0.5 0.5 0.5 0.5 Amin 0.3 0.3 0.3 0.3 Other additives ― T C P

1.0

FALEX wear amount (mg) 33.5 12.7 17.1 14.4 Thermal stability test slat 54.5 5.2 22.3 9.8 Die amount (mg / 45g)

Stopping performance Rusted Rusted Rusted Rusted

(Altitude) (Altitude) (Altitude) (Altitude)

"Sliding guide surface lubricating oil composition I I I

The present embodiment is an embodiment of an embodiment relating to a sliding guide surface lubricating oil obtained by blending the (C-11) component, the (C-12) component or a mixture thereof with the base oil. Hereinafter, the embodiment will be further described with reference to examples.

(Friction property evaluation test)

FIG. 1 is a schematic configuration diagram showing a friction coefficient measuring system used in a friction characteristic evaluation test. In FIG. 1, a table 1 and a movable jig 4 connected via a load cell 5 are arranged on a bed 6, and a heavy weight 9 as a substitute for a processing tool is arranged on the table 1. Have been. Table 1 and bed 6 are both made of iron. The movable jig 4 has a bearing portion, and the bearing portion is connected to the AZC servo motor 2 via a feed screw 3. The movable jig 4 can be reciprocated in the axial direction of the feed screw 3 (in the direction of the arrow in the figure) by operating the feed screw 3 with the AZC saponometer 2. Further, the load cell 5 is electrically connected to the computer 7 and the computer 7 and the AZC thermometer 2 are each electrically connected to the control plate 8, thereby controlling the reciprocation of the movable jig 4 and connecting the table 1 and the movable jig 4 The load can be measured during the period.

In such a friction coefficient measurement system, the lubricating oil composition is dropped on the upper surface of the bed 6, and the surface pressure between the table 1 and the bed 6 is adjusted to 200 kPa by selecting the table weight 9. After that, the movable jig 4 was reciprocated at a feed speed of 60 mm / min and a feed length of 750 mm. At this time, the load between the table 1 and the movable jig 4 is measured by the load cell 5 (load cell), and the friction of the guide surface (table 1 bed 6 = iron Z iron) is determined based on the measured values. The coefficient was determined. The above test was performed after three break-in operations. Tables 1 to 3 show the friction coefficient of each lubricating oil composition.

(Evaluation test for stick-slip prevention) Figure 2 is a schematic diagram showing the stick-slip prevention evaluation device (TE-77 tester manufactured by PLINT & PARTNERS). In the device shown in Fig. 2, the lower test piece 12, the upper test piece 11, and the elastic body 10 are laminated in this order on the support 110, and the test pieces 11 and 12 are elastically pressed against each other with a predetermined load. The specimens 11 and 12 are slid by reciprocating (sliding) the body 10 along the surface of the support 110. Then, a load applied to the test pieces 11 and 12 at the time of such sliding is measured by the load detector 13 to obtain a friction coefficient between the test pieces 11 and 12. FIG. 3 is a graph showing an example of the correlation between the friction coefficient obtained by the above operation and time. Δ in the figure indicates the amplitude of the coefficient of friction. The method shown in the literature (Tripology Society of Japan, Tribology Conference Proceedings, Tokyo 19999-15D17) was used, except that the test piece and conditions were improved to evaluate the lubricating oil for sliding guide surfaces using such an apparatus. Δ ^ when each lubricating oil composition was interposed between the test pieces 11 and 12 was measured in accordance with. Specifically, JIS G 405 1 S 45 C was used for both test pieces 11 and 12, and chloroprene rubber was used for the elastic body 10.The test was performed at an average slip speed of 0.3 mm / s and a load of 25 ON. Was done. Tables 1 to 3 show the obtained results.

(Base oil)

Base oil 1: Solvent refined paraffinic mineral oil (kinematic viscosity 68mmVs (40 ° C), viscosity index 95),

Base oil 2: 1-decene oligomer (kinematic viscosity 68 mm ² / s (40 ° C), viscosity index 140),

Base oil 3: Polyol ester obtained using pentaerythritol and a linear saturated fatty acid having 5 to 12 carbon atoms (kinematic viscosity: 68 mmVs (4ου), viscosity index: 120).

(Additive)

(C-1) Ingredient

C-1-1: Ν—oleoyl sarcosine (C-2) Ingredient

C-2-1: Nonylphenoxyacetic acid (NPA)

(E) Ingredient

E1: 2,5-bis (II-nonyldithio) 1-1,3,4-thiadiazole, E2: sulfide ester (sulfur content: 11.4%).

Other additives:

Amin: Dioctyldiphenylamine,

DBPC: g-tert-butyl-p-cresol,

TCP: tricresyl phosphate,

OAP: Georail acid phosphate,

OAc: Oleic acid.

[Effect of Embodiment of Lubricating Oil Composition for Sliding Guide Surface-1]

The lubricating oil composition for a sliding guide surface according to the present embodiment is excellent in both friction characteristics and stick-slip prevention properties.

1]

Example 1 2 3 4 5 Base oil 1 99.69 99.67 99.49 99.65 99.35 2

Three

Additive

C-1 component C-1-1 ¹ C-1-1 C-1-1 C-1-1

0.01 0.01 0.02 0.02

C-2 components C-2-1 C-2-1 C-2-1

0.03 0.03 0.03

E component E 1 E 1

0.2 0.3

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 0.1 Other additions

Agent

Coefficient of friction 0.109 0.110 0.112 0.106 0.109 Stick 0.009 0.010 0.008 0.008 0.007 Lip prevention

(Α β)

Ho 2]

Example 6 7 Base oil

2 99.35 ―

3 One 99.35 Additive

C-1 component C-1-1 C-1-1

0.02 0.02

G-2 component C-2-1 C-2-1

0.03 0.03

E component E1 E 1

0.3 0.3

DBPC 0.2 0.2 Amamine 0.1 0.1 Other additives 1-1 Friction coefficient 0.110 0.108 Stick slip 0.006 0.006

H)

Ho 3]

Experimental example 1 2 3 4 5 Base oil 1 99.2 99.2 98.7 98.7 98.7 2

Three

Additive

C-1 component

C-2 component 1 1 1 1 1

E. Ingredient ~ ~ ~ ~~~~ E 1 E2

1.0 1.0

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 0.1 Other additives TCP OAP OA c

0.5 0.5 1.0

Coefficient of friction 0.145 0.139 0.150 0.161 0.159 Sticks ＞ 0.05 0.013 0.015 0.018 0.017

)

"Sliding guide surface lubricating oil composition 1 2 J

This example is an example of an embodiment relating to a lubricating oil for a sliding guide surface, which is obtained by mixing a dispersion type viscosity index improver of the component (B) with the base oil. The embodiment will be described with reference to the following examples.

The types and amounts of the base oils tested and the additives added thereto are shown below.

In addition, the test methods performed for each blended lubricating oil composition are also shown below.

The obtained test results are summarized in Tables 1 to 4.

(Friction property evaluation test)

FIG. 1 is a schematic configuration diagram showing a friction coefficient measuring system used in a friction characteristic evaluation test. In FIG. 1, a table 1 and a movable jig 4 connected via a load cell 5 are arranged on a bed 6, and a heavy weight 9 as a substitute for a processing tool is arranged on the table 1. ing. Table 1 and bed 6 are both made of iron. The movable jig 4 has a bearing portion, and the bearing portion is connected to the AZC support 2 via a feed screw 3. The movable jig 4 can be reciprocated in the axial direction of the feed screw 3 (in the direction of the arrow in the figure) by operating the feed screw 3 using the A / C support 2. Further, the load cell 5 is electrically connected to the computer 7 and the computer 7 and the A / C servo meter 2 are each electrically connected to the control plate 8, thereby controlling the reciprocation of the movable jig 4 and the table 1 and the movable jig. Measurement of the load between 4 and 4 can be performed.

In such a friction coefficient measuring system, the lubricating oil composition is dropped on the upper surface of the bed 6, and the surface pressure between the table 1 and the bed 6 is selected to be 200 kPa by selecting the table weight 9. After the adjustment, the movable jig 4 was reciprocated at a feed speed of 6 OmmZmin and a feed length of 75 Omm. At this time, the load between the table 1 and the movable jig 4 is measured by the load cell 5 (load meter), and based on the measured values, the friction coefficient of the guide surface (table 1 bed 6 = 铸 iron 铸 iron) is determined. I asked. The above test was performed after three break-in operations. Tables 1 to 4 show the friction coefficient of each lubricating oil composition. (Evaluation test of stick slip prevention)

Fig. 2 is a schematic diagram showing the stick-slip prevention evaluation system (TE-77 tester manufactured by PLINT & PARTNERS). In the apparatus shown in FIG. 2, a lower test piece 12, an upper test piece 11, and an elastic body 10 are laminated in this order on a support table 110, and the elastic body 10 is pressed while pressing the test pieces 11, 12 with a predetermined load. The test pieces 11 and 12 are slid by reciprocating (sliding) along the surface of the support table 110. Then, the load applied to the test pieces 11 and 12 at the time of such sliding is measured by the load detector 13 to obtain the friction coefficient between the test pieces 11 and 12. FIG. 3 is a graph showing an example of the correlation between the friction coefficient obtained by the above operation and time. Δ ^ in the figure indicates the amplitude of the friction coefficient. With the exception that the test piece and conditions were improved to evaluate the lubricating oil for sliding guide surfaces using such an apparatus, the method shown in the literature (Tripology Conference, Tokyo 1999-5D17) was used. In accordance with the above, the value when each lubricating oil composition was interposed between test pieces 11 and 12 was measured. More specifically, the test was performed using JIS G 4051 S 45 C for both test pieces 11 and 12 and chloroprene rubber for the elastic body 10 at an average slip speed of 0.3 mmZs and a load of 25 ON. The results obtained are shown in Tables 1 to 4.

(Evaluation test of separability from water-soluble cutting fluid)

Lubricating oil composition 2 OmL and water-soluble cutting fluid (emulsion type cutting fluid, Nippon Oil Co., Ltd., JI SK 2241 "Cutting oil" W1 class 1 equivalent, dilution ratio 10 times) Collected in OmL graduated cylinder. After plugging the female cylinder and shaking at room temperature for 1 minute, the separation was evaluated by observing the state of separation after 24 hours. Evaluation of separability is performed as follows.

FIG. 4 is an explanatory diagram showing an example of the state of separation within the measuring cylinder 15 when a predetermined time has elapsed after shaking. In this test, the names of the separated layers were, in the order from the stopper 14, the foam layer (F layer) 16, oil layer (O layer) 17, cream layer (C Layer) 18, emulsified layer (E layer) 19, and the volume of each layer was measured. Tables 1 and 2 show the obtained results. The values shown in the table indicate the volume of the F layer-〇layer-C layer-E layer. For example, “0—20—0—80” indicates that the F layer is 0 ml, the 〇 layer is 20 ml, and the C layer. Means 0 ml and the E layer was 80 ml. In addition, the smaller the volume of the C layer or the shorter the time until the volume of the C layer becomes 0 m1, the better the separability.

(Base oil)

Base oil 2: 1-decene oligomer (Kinematic viscosity 68mmVs (40 ° C), viscosity index 140),

Base oil 3: Polyol ester obtained using pentaerythritol and linear and branched saturated fatty acids having 5 to 12 carbon atoms (kinematic viscosity: 68 mmVs (40 ° C), viscosity index: 120).

(Additive)

(B) Ingredient

B 1: Copolymer of CI-C18 alkyl methacrylate (90 mol%) and morpholinoethyl methacrylate (10 mol%) (number average molecular weight 80,000),

(C-1) ingredient

C—1-1—1: N-oleoyl sarcosine

(C-2) Ingredient

C—2-1—Nonylphenoxyacetic acid (NPA)

(E) Ingredient

E1: 2,5-bis (n-nonyldithio) 1-1,3,4-thiadiazole; E2: sulfide ester (sulfur content: 11.4%).

Other additives:

Amin: Dioctyldiphenylamine, DBPC: di-tertbutyl-p-cresol,

TCP: tricresyl phosphate,

OAP: Jorairashid phosphate,

OAc: Oleic acid.

PMA: C1-C18 alkyl methacrylate (number average molecular weight 80,000),

Imide: a monotype polybuteric succinic imide obtained by the reaction of polybuteric succinic anhydride with tetraethylene pentamine.

[Effects of Embodiment of Sliding Guide Surface Lubricating Oil Composition 1-2]

The lubricating oil composition for a sliding guide surface according to the present embodiment satisfies all the friction characteristics, stick-slip prevention properties, and separability from a water-soluble cutting fluid.

[table 1]

Example 1 2 3 4 5 Base oil 1 99.4 99.4 99.39 99.37 99.19 2

Three

B component B 1 Β2 B 1 Β2 B 1

0.3 0.3 0.3. 0.3 0.3

C-1 component ^: C-1-1 C-1-1

0.01 0.01

C-2 component ¹ C-2-1

0.03 ―

E component E 1

0.2

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 0.1 Other additives

Additive

Coefficient of friction 0.117 0.116 0.101 0.105 0.110 Stick 0.013 0.014 0.011 0.010 0.010 Anti-slip

Stop (Α β)

Cutting fluid separation 0-19-1-80 0-19-1-80 0-19-1-80 0-19-1-80 0-19-1-80 [Table 2]

Example 6 7 8 9 Base oil 1 99.35 99.05 I-

2 ― 1 99.05 ―

3-11 99.05 Additives

B component B2 B2 B2 B2

0.3 0.3 0.3 0.3

C-1 component C-1-1 C-1-1 C-1-1 C-1-1

0.02 0.02 0.02 0.02

C-2 components C-2-1 C-2-1 C-2-1 C-2-1

0.03 0.03 0.03, 0.03

E component ― E1 E1 E1

0.3 0.3 0.3

DBPC 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 Other additives I-I I Friction coefficient 0.099 0.105 0.102 0.100 Stick slip 0.010 0.007 0.008 0.006

H)

Cutting fluid separability 0-19-1-80 0-19-1-80 0-19-1-80 0-19-1-80

Ho 3]

Experimental example 1 2 3 4 5 Base oil 1 99.2 99.2 98.7 98.7 98.7

2

Three

Additives-11--

B component ― 1 1 1 1

C-1 component 1 1 1 1 1

C-2 component

E component E 1 E2

1.0 1.0

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 0.1 Other additives TC P OAP OAc

0.5 0.5 1.0 ―

Coefficient of friction 0.145 0.139 0.150 0.161 0.159 Stick〉 0.05 0.013 0.015 0.018 0.017 Lip prevention

(Α β)

Cutting fluid separability 0-19-1-80. 0-17-3-80 0-18-3-79 0-19-1-80 0-19-1-80

[Table 4]

Experimental example 6 7 Base oil 1 99.4 99.4

2-one

3-1 Additive-1

B component 1 ―

C-1 component

C-2 component-one

E component I C C 0.2 0.2 Amin 0.1 0.1 Other PMA imide 0.3 0.3 Friction coefficient 0.163 0.170 Sticks> 0.05> 0.05 Anti-lip

(Δ)

Cutting fluid separability 0-19-1-80 0-10-12-78

"Sliding guide surface lubricating oil composition 1"

In this embodiment, a lubricating oil for a sliding guide surface is obtained by blending the base oil with a phosphorus-containing carboxylic acid compound of the component (A-1), a thiophosphate of the component (A-2), or a mixture thereof. This is an example of the embodiment according to. The embodiment will be described with reference to the following examples.

In addition, the test methods performed for each lubricating oil composition thus formulated are also shown below. The obtained test results are summarized in Tables 1 to 5.

(Friction property evaluation test)

FIG. 1 is a schematic configuration diagram showing a friction coefficient measuring system used in a friction characteristic evaluation test. In FIG. 1, a table 1 and a movable jig 4 connected via a load cell 5 are arranged on a bed 6, and a heavy weight 9 as a substitute for a processing tool is arranged on the table 1. Have been. Table 1 and bed 6 are both made of iron. The movable jig 4 has a bearing portion, and the bearing portion is connected to the A / C servo motor 2 via a feed screw 3. By moving the feed screw 3 with the A-no C thermometer 2, the movable jig 4 can reciprocate in the axial direction of the feed screw 3 (the direction of the arrow in the figure). Further, the load cell 5 is electrically connected to the computer 7 and the computer 7 and the AZC thermometer 2 are each electrically connected to the control plate 8, thereby controlling the reciprocation of the movable jig 4 and connecting the table 1 and the movable jig 4 The load can be measured during the period.

In such a friction coefficient measurement system, the lubricating oil composition is dropped on the upper surface of the bed 6, and the surface pressure between the table 1 and the bed 6 is adjusted to 200 kPa by selecting the table weight 9. After that, the movable jig 4 was reciprocated at a feed speed of 6 OmmZmin and a feed length of 75 Omm. At this time, the load between the table 1 and the movable jig 4 is measured by the load cell 5 (load meter), and based on the measured values, the friction coefficient of the guide surface (table 1 bed 6 = 铸 iron 铸 iron) I asked. The above test was performed after three break-in operations. Tables 1 to 5 show the friction coefficient of each lubricating oil composition. (Evaluation test of stick slip prevention)

Fig. 2 is a schematic diagram showing a stick-slip prevention evaluation device (TE-77 tester manufactured by PLINT & PARTNERS). In the apparatus shown in FIG. 2, a lower test piece 12, an upper test piece 11, and an elastic body 10 are laminated in this order on a support table 110, and the elastic body 10 is pressed while pressing the test pieces 11, 12 with a predetermined load. The test pieces 11 and 12 are slid by reciprocating (sliding) along the surface of the support 110. Then, the load applied to the test pieces 11 and 12 at the time of such sliding is measured by the load detector 13, so that the friction coefficient between the test pieces 11 and 12 is obtained. FIG. 3 is a graph showing an example of the correlation between the friction coefficient obtained by the above operation and time. Represents the amplitude of the friction coefficient. Except that the test piece and conditions were improved for the evaluation of lubricants for sliding guide surfaces using such a device, the method shown in the literature (Tripology Conference of the Japan Society of Tribology, Tokyo 1999-15 D17) was used. Δ ^ when each lubricating oil composition was interposed between test pieces 11 and 12 was measured in accordance with the above. Specifically, the test pieces 11 and 12 were each tested using JISG 4051 S45C and the elastic body 10 using chloroprene rubber at an average slip speed of 0.3 mmZs and a load of 250 N. Tables 1 to 5 show the obtained results.

(Evaluation test of separability from water-soluble cutting fluid)

Lubricating oil composition 2 OmL and water-soluble cutting fluid (Emulsion type cutting fluid, Nippon Oil Co., Ltd., JI SK 2241 “Cutting oil” W1 class 1 equivalent, dilution ratio 10 times) Collected in OmL graduated cylinder. After plugging the female cylinder and shaking at room temperature for 1 minute, the separation was evaluated by observing the state of separation after 24 hours. The separability was evaluated as follows.

FIG. 4 is an explanatory diagram showing an example of the state of separation within the measuring cylinder 15 when a predetermined time has elapsed after shaking. In this test, the names of the separated layers were, in the order from the stopper 14, the foam layer (F layer) 16, oil layer (O layer) 17, cream layer (C Layer) 18, emulsified layer (E layer) 19, and the volume of each layer was measured. Tables 1 and 2 show the obtained results. The numerical values shown in the table indicate the volume of the F layer, the entire layer, the C layer, and the E layer. For example, “0—20—0—80” indicates that the F layer is 0 m 1, the O layer is 2 Oml, and the C layer Means that the E layer was 80 m 1. Also, the smaller the volume of the C layer or the shorter the time until the volume of the C layer becomes 0 m1, the better the separability.

(Base oil)

Base oil 1: Solvent refined paraffinic mineral oil (kinematic viscosity 68 mmVs (40 ° C), viscosity index 95),

Base oil 3: Polyol ester obtained by using pentaerythritol and a linear or branched saturated fatty acid having 5 to 12 carbon atoms (kinematic viscosity: 68 mm ² / s (40 ° C.), viscosity index: 120).

(Additive)

(A-1) ingredient

A—1-1—1: 3 dithiophosphorylated propionic acid,

A—1-2: 3 dithiophosphorylated ethyl propionate,

(A-2) ingredient

A— 2-1: Triphenylphosphorothionate.

(B) Ingredient

B 1: — Copolymer of C ₁₈ alkyl methacrylate (90 mol) and morpholinoethyl methacrylate (10 mol%) (number average molecular weight 80,000),

B 2: Copolymer of C ^ —C ₁₈ alkyl methacrylate (90 mol%) and benzoylaminomethacrylate (10 mol%) (number average molecular weight 70,000).

(C-1) Ingredient

C-1-1: N-oleoyl sarcosine.

(C-2) Ingredient

C-2-1: Nonylphenoxyacetic acid. (E) Ingredient

E l: 2,5-bis (n-nonyldithio) -1,3,4-thiadiazole, E 2: sulfide ester (sulfur content: 11.4%).

Other additives:

Amin: Dioctyldiphenylamine,

DBPC: G-tert-butyl-p-cresol,

TCP: tricresyl phosphate,

OAP: Georail acid phosphate,

OAc: Oleic acid.

[Effects of Embodiment of Lubricating Oil Composition 13 for Sliding Guide Surface]

The lubricating oil composition for a sliding guide surface of the present embodiment is particularly excellent in both the friction characteristics and the stick-slip prevention.

[table 1]

Example IO τΗX C (1 2 3 4 5

99.68 99.5 99.5 99.5 99.4

Additive

A-1 component A-1-1 A-1-2 A-1-2 A-1-2

0.02 0.2 0.1 0.2

A-2 component Α-2-1 A-2-1

0.2 0.1

B component B1

0.1

C-l component ― ― ― ―

C-2 component 1 ― ― ― 1

E component ― ― ― ― ―

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0,1 0.1 0.1 0.1 Other additions ____

Agent I ―

Coefficient of friction 0.116 0.118 0.115 0.111 0.108 Sticks 0.018 0.017 0.017 0.015 0.015 Lip prevention

(Δ)

Cutting fluid separability 0-17-4-79 0-17-4-79 0-18-3-79 0-18-3-79 0-19-1-80 [Table 2]

Example 6 7 8 9 10 Base oil 1 99.48 99.25 99.57 99.27 99.37 2

Three

Additive

A— 1 component A-1-1 A-1-2 A-2-1

0.02 0.2 0.1

A— 2 components A-2-1 A-2-1

0.05 0.1

B component Β2 B1 B1 B2 B1

0.2 0.2 0.1 0.2 0.1

C-1 component C-1-1 C-1-1

― 0.01 0.01

C—two components C-2-1

0.03

o

E component E1

0.2

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 0.1 Other additions ¹

Agent-I

Coefficient of friction 0.107 0.106 0.099 0.099 0.101 Stick 0.013 0.012 0.009 0.010 0.011 Anti-lip properties

(Δ ^)

Cutting fluid separability 0-19-1-80 0-19-g 80 0-19-1-80 0-19-g 80 0-19-1-80 [Table 3]

Four]

Example 16 Base oil 11

2 ―

3 98.95 Additive

A-1 component A-1-2

0.1

A-2 component A-2-1

0.1

B component B2

0.2

C-1 component C-1-1

0.02

C-2 component C-2-1

0.03

E component E 1

0.3

DBPC 0.2 Amin 0.1 Other additives

Coefficient of friction 0.091 Stick slip

)

Cutting fluid separability 0-19-1-80 Ho 5]

Experimental example 1 2 3 4 5 Base oil 1 99.2 99.2 98.7 98.7 98.7 2

Three

Additive

A-1 ingredient 1 1 1 1 1

A-two components one — 'one one one

B component 1-1 1 1

C-1 component-1 1 1 1

C-2 component 1 – 1 –

E component E1 E2

1.0 1.0

DBPC 0.2 0.2 0.2 0.2 0.2 Amin 0.1 0.1 0.1 0.1 0.1. Other additives TCP OAP OA c

0.5 0.5 1.0 ― 1 Coefficient of friction 0.145 0.139 0.150 0.161 0.159 Stick> 0.05 0.013 0.015 0.018 0.017 Anti-lip properties

(Δ)

Cutting fluid separability 0-19-1-80 0-17-3-80 0-18-3-79 0-19-1-80

"Hydraulic fluid 1"

The present embodiment is an embodiment relating to a hydraulic oil in which a thiophosphate of the component (A-2) and a dispersion-type viscosity index improver of the component (B) are blended with the base oil. The embodiment will be described with reference to the following examples.

In the following Examples 1 to 5 and Experimental Examples 1 to 8, lubricating oil compositions having the compositions shown in Tables 1 to 3 were prepared using the base oils and additives shown below, respectively.

Base oil:

Base oil 1: Highly solvent refined paraffin base oil (kinematic viscosity at 40 ° C: 46. ImmVs, viscosity index 100),

Base oil 2: Paraffin hydrocracking base oil (kinematic viscosity at 40 ° C: 46. lmm ² / s, viscosity index 125).

(A-2) thiophosphoric acid ester,

A— 2-1: Triphenylphosphorothionate,

A— 2-2: Tri (butylphenyl) phosphorothionate.

(B) Dispersion type viscosity index improver:

B 1: Copolymer of alkyl methacrylate having 1 to 18 carbon atoms (90 mol%) and morpholinoethyl methacrylate (10 mol%) (number average molecular weight: 80,000),

B 2: carbon number; Copolymers of alkyl methacrylates (9 Omo 1%) and benzoylamino methacrylate (10 mol%) (number average molecular weight: 70,000).

(C—1) Compounds represented by general formulas (11) to (13)

C—1-1—1: N-oleoyl sarcosine

(C-2) — a compound represented by the general formula (14)

C-2-1: Nonylphenoxyacetic acid

(G-A) phenolic antioxidant

G—A 1: di-tert-butyl-ρ-cresol

(GB): Amine antioxidant GB 1: Dioctyldiphenylamine

Other additives:

E 1: zinc dioctyldithiophosphate

HI: tricresyl phosphate

K1: a homopolymer of alkyl methacrylate having 1 to 18 carbon atoms (number average molecular weight: 150,000),

K 2: a monotype polybutenyl succinimide obtained by reacting polybutenyl succinic anhydride with tetraethylene pentamine;

K5: Calcium dinonylnaphthalene sulfonate (50% by mass solution, carrier oil: mineral oil refined with paraffin solvent, base number of solution: 170 mg KOH / g) ₀

[Thermal stability test]

For each of the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 8, 50 ml of sample oil was collected in a beaker with a capacity of 50 ml according to the `` Lubricant Thermal Stability Method '' specified in JISK2540. , Iron and copper coiled catalysts were added, and a thermal stability test was performed for a certain period of time (10 days, 20 days) in a 140 ° C air bath. After the test, the sample oil was filtered with a filter, and the amount of sludge in the sample oil was measured. The results obtained are shown in Tables 1-3.

[SRV (small reciprocating friction) test]

SRV tests were performed on the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 8 to evaluate the friction characteristics. More specifically, as shown in Fig. 5, the sample oil is applied to the point contact area between the disk 1 and the pole 2 placed on the upper surface, and the pole 2 is directed vertically downward (arrow A in the figure). The pole 2 was reciprocated relatively in the direction along the upper surface of the disk 1 (arrow B in the figure) while applying a load to the disk. The coefficient of friction at this time was measured by a load cell (not shown) attached to a disc 1 retainer (not shown). The disc 1 was made of SPCC material having a diameter of 25 mm and a thickness of 8 mm, and the pole 2 was made of SPCC material having a diameter of 10 mm. The load applied to pole 2 is 1,200 N, the amplitude of pole 2 is lmm, the frequency is 5 OHz, and the temperature is 80. did. Tables 1 to 3 show the obtained results.

[Demulsification test]

For each of the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 8, the test temperature was 54 ° C according to `` Petroleum products-Lubricating oil-Demulsification test method '' specified in JISK250. The anti-emulsifying property was evaluated. Tables 1 to 3 show the obtained results. The values in the table mean oil layer (ml)-water layer (ml)-emulsified layer (ml) (elapsed time (minutes)).

"Wear resistance test"

For each of the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 8, a vane pump test specified in ASTM D2882 was conducted, and the weight of the vane and ring before and after the test was measured, and the wear was measured. The amount was measured. The test time was 100 hours. Tables 1 to 3 show the obtained results.

[Effects of Hydraulic Fluid 1)

The lubricating oil composition of the present embodiment can achieve all of the sludge suppression, abrasion resistance and friction characteristics at a high level in a well-balanced manner, and is also excellent in water separation properties. Then, by using the lubricating oil of the present embodiment as a hydraulic oil, a lubricating oil composition useful for achieving improvement in reliability and energy saving of the hydraulic operating system is provided.

Ho 1]

Example 1 2 3 4 5 Base oil 1 98.90

2 98.70 98.50 98.55 98.45

A-2— 1 0.30 0.20 0.30 ― ―

A-2-2---0.30 0.30

B 1 0.30 0.30-one

B 2 11 0.30. 0.30 0.30

C-1-1 11-1-1 0.05 0.05

C-1 2-1 1 1 0.10 1 0.10

G— A— 1 0.50 0.50 0.50 0.50 0.50

G-B- 1-0.30 0.30 0.30 0.30 Thermal stability test 10 says 1.8 1.3 2.8 1.3 3.5 Test sludge 20 says 7.2 8.5 7.8 5.3 8.3 Quantity ng / 45g)

S RV 0.118 0.119 0.118 0.113 0.110

(Coefficient of friction)

Demulsification 40-40-0 40-40-0 40-40-0 40-40-0 40-40-0

(5) (10) (10) (10) (10) Abrasion resistance 10.5 11.3 12.4 10.8 9.8 (Wear amount [mg])

[, Table 2]

Experimental example Experimental example 3 Experimental example 4

1 2

Base oil 1 98.90

2 98.10 98.60 98.60

A- 2-1 0.30--

A- 2-2-0.30. 0.30 0.30

B 1-0.30--

G-A- 1 0.50 0.50 0.50 0.50

G-B- 1 0.30 0.30 0.30 0.30

E 1 one 0.50-one

H 1---0.30

K 1 one-0.30-

K2--1-Thermal stability 10 10.3 11.8 7.7 11.6 Test 20 20 28.7 35.2 12.4 27.9 Slack

,

SRV 0.120 0.132 0.122 0.120 Demulsifying property 40-40-0 40-40-0 15-20-45 20-26-34

(5) (20) (80) (80) Abrasion resistance 9.5 14.3 15.8 10.2

Lmg ") [Table 3]

Experimental example 5 Experimental example 6 Experimental example 7 Experimental example 8 Base oil 1

2 98.60 98.30 98.60 98.30

A— 2— 1 One — —

A- 2-2 0.30 0.30 0.30 0.30

B 1----

G— A-1 0.50 0.50 0.50 0.50

G-B- 1 0.30 0.30 0.30 0.30

E 1-one-one

H 1-0.30 one 0.30

K 1 0.30 0.30--

K2--0.30 0.30 Thermal stability 10 5.8 1.3 13.5 14.3 i test sla 20 11.2 12.7 32.4 33.8

(mg / 5g)

S RV 0.123 0.122 0.124 0.124 (Coefficient of friction)

Demulsifying properties 20-28-34 19-28-33 24-23-53 22-18-3

(60) (60) (60) 8 (80) Abrasion resistance 13.5 12.7 15.7 14.3 (Wear amount [mg]) [Examples 6 to 8]

In Examples 6 to 8, lubricating oil compositions having the compositions shown in Table 4 were prepared using the above base oils and additives, and the following oil agents.

(D) Ester oily agent:

D1: ester of sorbitan and oleic acid (sorbitan monooleate 25 mol%, sorbitan dioleate 40 mol%, sorbitan triolate 30 mol%, sorbitan tetraoleate 5 mol%),

D 2: Triester of glycerin with acetic acid and a mixed fatty acid of fatty acids having 16 to 20 carbon atoms (fatty acid composition: 66 mol% of acetic acid, 30 mol% of straight-chain saturated fatty acids having 16 to 20 carbon atoms) The C18 straight-chain unsaturated fatty acid 4 mol%)

D 3: ester of glycerin and a branched saturated fatty acid having 16 to 20 carbon atoms (glycerin monoester 25 mol%, glycerin diester 75 mol%, glycerin triester 0 mol%).

Next, for each of the lubricating oil compositions of Examples 6 to 8, a thermal stability test, a SRV (micro reciprocating friction) test and a wear resistance test were performed in the same manner as described above. Table 4 shows the obtained results.

[Table 4]

Example 6 7 8 Base oil 1 98.50

2 98.50 98.50

A— 2— 1 0.30 0.30 0.30

A- 2-2---

B 1 ■ ―

B 2 0.30 0.30 0.30.

C-1 1 1 1 1 1 1

C-1 2—1 0.10 0.10 0.10

D 1 0.30 one

D 2 ― 0.30

D 3 one 0.30

G 1 0.50 0.50 0.50

H 1---Thermal stability test 10 0 1.8 1.3 2.4 Test sludge 20 0 7.2 8.5 7.8 Amount ung / 45g)

S RV 0.112 0.108 0.109 (Friction coefficient)

Abrasion resistance 9.5 8.2 10.2 (Wear amount [mg])

"Hydraulic Fluid 1"

The present embodiment is an embodiment relating to a hydraulic oil obtained by blending the base oil with a phosphorus-containing carboxylic acid compound of the component (A-1) and a dispersion-type viscosity index improver of the component (B). The embodiment will be described with reference to the following examples.

In Examples 1 to 5 and Experimental Examples 1 to 9, lubricating oil compositions having the compositions shown in Tables 1 to 3 were prepared using the base oils and additives shown below, respectively. Base oil:

Base oil 1: highly refined paraffinic base oil (kinematic viscosity at 40 ° C: 46. lmm ² Zs, viscosity index 100),

(A-1) Phosphorus-containing carboxylic acid compound

A— 1-1: β-dithiophosphorylated propionic acid,

A-1-2: β-dithiophosphorylated ethyl propionate. (Β) Dispersion type viscosity index improver:

Β1: A copolymer of alkyl methacrylates with 1 to 18 carbon atoms (9 Omo 1%) and morpholinoethyl methacrylate (10 mol%) (number average molecular weight: 80,000),

B 2: Copolymer of alkyl methacrylate having 1 to 18 carbon atoms (9 Omo 1 ¾) and benzoylamino methacrylate (10 mol%) (number average molecular weight: 70,000).

(A- 2) thiophosphoric acid ester

A—2-1—Triphenyl phosphorothione,

(C-1) Compounds represented by general formulas (17) to (19):

C—1-1—1: N-oleoyl sarcosine

(C-2) a compound represented by the general formula (20):

C-2-1: Nonylphenoxyacetic acid

(G-A) phenolic antioxidant:

GA-1: di-tert-butyl-ρ-cresol. (GB): Amine antioxidant

G-B— 1: Dioctyldiphenylamine,

E 1: zinc octyldithiophosphate,

HI: tricresyl phosphate.

Other additives:

K 1: homopolymer of alkyl methacrylate having 1 to 18 carbon atoms (number average molecular weight: 150,000),

K3: Calcium dinonyl naphthalene sulfonate (50% by mass solution, carrier oil: mineral oil refined with paraffinic solvent, base number of solution: 170 mg KOH / g) ₀

[Thermal stability test]

For each of the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 9, 50 ml of sample oil was collected in a 50 ml beaker in accordance with the `` Lubricant Thermal Stability Method '' specified in JISK2540. Iron and copper coiled catalysts were added, and a thermal stability test was performed for a certain period of time (10 days, 20 days) in a 140 ° C air oven. After the test, the sample oil was filtered with a filter, and the amount of sludge in the sample oil was measured. The results obtained are shown in Tables 1-3.

[SRV (small reciprocating friction) test]

SRV tests were performed on the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 9 to evaluate the friction characteristics. More specifically, as shown in Fig. 5, sample oil is applied to the point contact area between the disk 1 and the pole 2 placed on the upper surface of the disk 1, and the pole 2 is directed vertically downward (arrow A in the figure). The ball 2 was relatively reciprocated in the direction along the upper surface of the disk 1 (arrow B in the figure) while applying a load to. The coefficient of friction at this time was measured by a load cell (not shown) attached to a disc 1 retainer (not shown). The disc 1 was made of SPCC material having a diameter of 25 mm and a thickness of 8 mm. The pole 2 was made of SPCC material having a diameter of 10 mm. The load applied to pole 2 is 1, The amplitude of 200N, pole 2 was lmm, the frequency was 50Hz, and the temperature was 80 ° C. Tables 1 to 3 show the obtained results.

[Demulsification test]

For each of the lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 8, demulsification at a test temperature of 54 ° C was conducted in accordance with `` Petroleum product-lubricating oil-Demulsification test method '' specified in JISK 2520 Was evaluated. Tables 1 to 3 show the obtained results. The numerical values in the table mean oil layer (ml)-water layer (ml)-emulsified layer (ml) (elapsed time (minutes)).

"Wear resistance test"

The lubricating oil compositions of Examples 1 to 5 and Experimental Examples 1 to 9 were subjected to a vane pump test specified in ASTM D 2882, and the weights of the vanes and rings before and after the test were measured to measure the amount of wear. The test time was 100 hours. Tables 1 to 3 show the obtained results.

[Hydraulic Fluid—Effect According to Second Embodiment]

[table 1]

Example 1 2 3 4 5 Base oil 1 98.85

2 98.75 98.50 98.55 98.35

A- 1-1 0.05 0.05 one

A- 1-2--0.30 0.30 0.30

B 1 0.30 0.30 one-one

B 2 one 0.30 0.30 0.30

A- 2-1 ― 0.10 1-1 1 0.10

C-1 1 1 1 ― ― 1 0.05 0.05

C-1 2— 1--0.10-0.10

G— A— 1 0.50 0.50 0.50 0.50 0.50

G-B- 1 0.30 0.30 0.30 0.30 0.30 Thermal stability test 10 1.8 1.8 2.3 2.7 1.3 Test sludge 20 7.2 5.3 6.8 6.2 6.5 Amount (mg / 5g)

S RV 0.116 0.119 0.115 0.113 0.110 Demulsification 40-40-0 40-40-0 40-40-0 40-40-0 40-40-0

(5) (10) (10) (10) (10) Abrasion resistance 13.5 8.3 15.8 13.4 12.2 (Wear amount [mg])

<

2]

Experimental example 1 2 3 4 5 Base oil 1 98.85

2 98.40 98.60 98.60 98.9

A— 1 1 1 0.05-One-

A— 1— 2 One—— 0.30 0.30

B 1 ― 0.30--one

B 2 one one 0.30 ―-one ―-― one

G-A- 1 0.50 0.50 0.50 0.50 0.50

G-B- 1 0.30 0.30 0.30 0.30 0.30

E 1-0.50---

H2--0.30--

K 1 0.30--1

K2--one 0.30-

K3---1-Thermal stability test 10: 22.3 15.2 3.3 3.3 12 -.3 Test sludge 20: 48.7 48.3 12.5 8.6 32.7 Amount (mg / 5g)

S RV 0.127 0.132 0.124 0.122 0.120 (Coefficient of friction)

Demulsification Abrasion resistance 17.5 12.3 22.4 18.5 13.5 (Wear amount [mg]) Ho 3]

Experimental example 6 7 8 9 Base oil 1.98.90

2 98.30 98.60 98.30

A— 1— 1----

A- 1-2 0.30 ― 0.30 0.30

B 1 one-one one

I

B 2 one 0.30 ― one

A— 2-1

G-A- 1 0.50 0.50 0.50 0.50

G-B- 1 0.30 0.30 0.30 0.30

E 1 ― ―--

H 1-one--

K 1 0.30 one-0.30

K2 0.30 one--

K3 1-1 0.30 0.30 Thermal stability test 10: 4.4 2.2 13.6 14.5 Test sludge 20: 13.2 5.9 33.8 35.4 Amount Ung / 45g)

S RV 0.122 0.120 0.128 0.127

(Coefficient of friction)

Demulsifying properties 32-27-18 31-26-23 (6

(60) 0) Abrasion resistance 18.7 135.8 19.3 18.4 (Wear amount [mg]) "Examples 6 to 8"

In Examples 6 to 8, lubricating oils having the compositions shown in Table 4 were prepared using the above base oils, additives, and ester oil agents shown below.

(D) Ester oily agent:

D 1: ester of sorbitan with oleic acid (sorbitan monolate 25 mol%, sorbitan dioleate 40 mol%, sorbitan trioleate 30 mol%, sorbitan tetraoleate 5 mol%),

D 2: Small ester of glycerin, acetic acid and mixed fatty acid of 16 to 20 carbon atoms (fatty acid composition: 66 mol% of acetic acid, 30 mol% of straight chain saturated fatty acid of 16 to 20 carbon atoms) , Straight-chain unsaturated fatty acids having 18 carbon atoms, 4 mol%), D 3: esters of glycerin and branched saturated fatty acids having 16 to 20 carbon atoms (glycerin monoester, 25 mol%, glycerin diester, 75 mol) %, Glycerin triester 0 mol%).

The test was performed in the same manner as in the previous example, and the test results are shown in Table 4.

[Table 4]

Example 6 7 8 Base oil 1

2 98.45 98.45 98.45

A— 1— 1 0.05 0.05 0.05

A— 1 2 1 1

B 1 0.30 0.30 0.30

B 2

A— 2— 1 One One One

C-1-1 11---

C-1-1 0.10 0.10 0.10

D 1 0.30 one-

D 2-0.30-

D 3 one-0.30

G-A- 1 0.50 0.50 0.50

G-B- 1 0.30 0.30 0.30 Test 10 Stability 1.4 1.2 1.6 Test sludge 20 Test 5.2 4.3 4.6 Amount ung / 45g)

S RV 0.113 0.108 0.110 (Coefficient of friction)

Abrasion resistance 12.5 8.1 13.7 (Wear amount [mg]) `` Hydraulic fluid 1 3 J

The present embodiment is an embodiment relating to a hydraulic oil obtained by blending the base oil with an ester oil agent of the component (D). The embodiment will be described with reference to the following examples.

In the following Examples 1-4 and Experimental Examples 1-4, lubricating oil compositions having the compositions shown in Tables 1 and 2 were prepared using the base oils and additives shown below, respectively.

Base oil:

Base oil 1: A highly refined paraffinic base oil (kinematic viscosity at 40 ° C: 46. lmm ² Zs, viscosity index 100). -Base oil 2: paraffinic hydrocracked base oil (kinematic viscosity at 40: 46. Imm s, viscosity index 125).

(D) Polyhydric alcohol ester:

D 1: Triester of glycerin with a mixed fatty acid of acetic acid, n-octanedecanoic acid and oleic acid (fatty acid composition: 66.6 mol% of acetic acid, 30.0 mol% of n-octacutadecanoic acid, oleic acid 3.4 mol%).

D 2: Triester of glycerin with a mixed fatty acid of acetic acid, n-octadecanoic acid and oleic acid (fatty acid composition: 67.0 mol% of acetic acid, 28.0 mol% of n-octadecanoic acid, 5.0 mol of oleic acid) Mol%).

D 3: Triester of glycerin and a mixed fatty acid of acetic acid, n-hexadecanoic acid and oleic acid (fatty acid composition: 66.7 mol% of acetic acid, 30.1 mol% of n-hexadecanoic acid, oleic acid 3. 2 mol%).

(I) Other ester oily agents

I 1: monoester of glycerin and n-octanedecanoic acid,

12: Monoester of glycerin and oleic acid.

(A-1) Phosphorus-containing carboxylic acid compound:

A— 1-1: β-dithiophosphorylated propionic acid.

(Η): Phosphate ester

HI: triphenyl phosphate. (A-2): Thiophosphate

A-2-1: Triphenylphosphorothionate.

(G-A) phenolic antioxidants

G-A-1: 2,6-di-tert-butyl-p-cresol.

(G-B) Amine antioxidants

G-B-1: Dioctyldiphenylamine.

(K) Dispersion type pour point depressant:

K 1: Monotype polybutenyl succinimide obtained by reacting polybutenyl succinic anhydride with tetraethylenepentamine.

[Thermal stability test]

For each lubricating oil composition of Examples 1-4 and Experimental Examples 1-4, sample 50 ml of sample oil in a 50 ml beaker according to the `` Lubricant Thermal Stability Method '' specified in JISK 2540, and And a copper coil catalyst were added, and a thermal stability test was performed for a certain period of time (10 days, 20 days) in a 140 ° C air oven. After the test, the sample oil was filtered with a filter, and the amount of sludge in the sample oil was measured. Tables 1 and 2 show the obtained results.

[SRV (small reciprocating friction) test]

An SRV test was performed on each of the lubricating oil compositions of Examples 1 to 4 and Experimental Examples 1 to 4 to evaluate the friction characteristics. More specifically, as shown in Fig. 5, the sample oil is applied to the point contact area between the disk 1 and the pole 2 placed on the upper surface, and the pole 2 is directed vertically downward (arrow A in the figure). The pole 2 was reciprocated relatively in the direction along the upper surface of the disk 1 (arrow B in the figure) while applying a load to the disk. The coefficient of friction at this time was measured by a load cell (not shown) attached to a disc 1 retainer (not shown). A disc 1 made of SUJ2 material having a diameter of 25 mm and a thickness of 8 mm was used, and a pole 2 made of SUJ2 material having a diameter of 10 mm was used. The load applied to pole 2 was 1,200 N, the amplitude of pole 2 was lmm, the frequency was 50 Hz, and the temperature was 8-0. Tables 1 and 2 show the obtained results.

"Wear resistance test" For each of the lubricating oil compositions of Examples 1 to 4 and Experimental Examples 1 to 4, a vane pump test specified in ASTMD 2882 was conducted, and the weight of the vane and ring before and after the test was measured, and the amount of wear was measured. Was measured. The test time was 100 hours. Tables 1 and 2 show the obtained results.

[Low temperature storage stability]

100 ml of each of the lubricating oil compositions of Examples 1 to 4 and Experimental Examples 1 to 4 was placed in a glass container with a capacity of 100 ml and the glass container was sealed and stored in a refrigerator of 0. did. The appearance of the lubricating oil composition after 60 days was observed, and the presence or absence of precipitation was observed. Tables 1 and 2 show the obtained results.

[Effects of Hydraulic Fluid 1-3]

The lubricating oil composition of the present embodiment can achieve all of the sludge suppression, abrasion resistance and precipitation prevention at a high level in a well-balanced manner. Further, by using the lubricating oil of the present embodiment as a hydraulic oil, a lubricating oil composition useful for improving the reliability of the hydraulic operating system and achieving energy saving is provided.

Example 1 2 3 4 Base oil 1 97.80 97.90 97.67 2 98.30

D 1 0.20--

D 2-0.20 ― one

D3 11 .0.30 0.30

A-1-1 11-0.03

HI 1.00 one 0.60 1.00

A-2-1 One 0.50 0.20 ―

G-A-l 0.50 0.50 0.50 0.50

G-B-l 0.20 0.20 0.20 0.20

(Kl 0.30 0.30 0.30 0.30 Thermal stability test 10 0 1.8 1.3 0.110 1.3 Test sludge 20 20 5.2 5.2 8.4 5.3 Amount ung / 45g)

SRV 0.108 0.108 0.110 0.106 (Coefficient of friction)

Abrasion resistance 10.2 9.3 8.4 4.8 (Wear amount [mg])

Low-temperature storage stability None None None None (presence or absence of precipitation)

2]

Experimental example 1 2 3 4 Base oil 1 97.70

2 98.20 97.70 97.70

1-1 0.30 0.30-one

1-2 one-0.30 0.30

A-1-1 one one--

HI 1.00 one 0.80 1.00

A- 2-1-0.50 0.20-

G-A-l 0.50 0.50 0.50 0.50

G-B-l 0.20 0.20 0.20 0.20

Kl 0.30 0.30 0.30 0.30 Thermal stability test 10 5.8 5.3 4.8 3.3 Test sludge 20 13.2 16.5 19.7 5.3 Amount (mg / 45g)

S RV 0.102 0.103 0.106 0.109 (Coefficient of friction)

Abrasion resistance 17.8 19.3 12.4 13.7 (Wear amount [mg])

Cold storage stability Yes Yes No No (with or without sediment)

Claims

The scope of the claims

1. For industrial machinery and equipment containing any one selected from mineral oils, fats and oils, synthetic oils and mixed oils thereof as a base oil and containing at least one additive selected from the following components (A) to (D) Lubricating composition.

(A) Ingredient:

(B.) Ingredient:

Dispersion type viscosity index improver

(C) Ingredient:

The following (C-1) and / or (C-2) components:

R ^: -CO-NR ^2- (CH ₂ ) ,,-COOX ¹ (1)

(In the formula, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkyl group having 6 to 30 carbon atoms, R ² is an alkyl group having 1 to 4 carbon atoms, X ¹ is hydrogen, and 1 to 30 carbon atoms. An alkyl group or an alkenyl group having 1 to 30 carbon atoms, and n represents an integer of 1 to 4.)

[R ¹ -CO-NR ² — (CH ₂ ) _n -COO] J ¹ (2) (wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkenyl group having 6 to 30 carbon atoms, R ² Is an alkyl group having 1 to 4 carbon atoms, Y ¹ is an alkali metal or an alkaline earth metal, n is an integer of 1 to 4, m is 1 when Y is an alkali metal, and 2 when Y is an alkaline earth metal. Is shown.)

[R ^ CO-NR ^2- (CH ₂ ) _n — CQO] _m — Z— (OH) _m . (3) (wherein, R ¹ is an alkyl group having 6 to 30 carbon atoms or an alkyl group having 6 to 30 carbon atoms) An alkenyl group, R ² is an alkyl group having 1 to 4 carbon atoms, Z is a residue excluding a hydroxyl group of a dihydric or higher polyhydric alcohol, m is an integer of 1 or more, m 'is an integer of 0 or more, m + m 'is a valence of Z, and n is an integer of 1 to 4.)

Component (C-1): a compound represented by the following general formula (4) R ³ — CH ₂ COOH — General formula (4)

R ⁴ —C ₆ H ₄ 〇 (5) (wherein, R ⁴ represents an alkyl group having 1 to 20 carbon atoms or hydrogen)

(D) Ingredient:

Ester oil agent.

2. The lubricating composition according to claim 1, wherein the additive is any one selected from the components (A) to (C).

3. The lubricating composition according to claim 1, as a lubricating oil composition for a paper machine, wherein the additive is any one selected from the components (A) to (C).

4. The lubricating composition according to claim 1, wherein the additive is any one selected from the components (A) to (C) as a lubricating oil composition for a sliding guide surface.

5. The lubricating oil composition according to claim 1, wherein the additive comprises a phosphorus-containing carboxylic acid compound as the component (A-1) and a dispersion-type viscosity index improver as the component (B). Composition.

6. The lubricating property according to claim 1, wherein the additive comprises the thiophosphate of the component (A-2) and the dispersion-type viscosity index improver of the component (B). Composition.

7. The lubricating composition according to claim 1, wherein the additive is an ester oily agent of the component (D), which is an ester of a polyhydric alcohol and a monobasic fatty acid, and is a lubricating oil composition.

8. The ester oily agent of the component (D), which is an ester of the polyhydric alcohol and a monobasic fatty acid, is selected from the following esters (D-1) to (D-3): The lubricating composition according to claim 7, wherein the lubricating composition is provided.

(D-1): a partial ester having a degree of esterification of 1 and a degree of esterification of

Esters of polyhydric alcohols containing two or more partial esters and unsaturated fatty acids,

(D-2): complete ester of polyhydric alcohol and fatty acid with mixed fatty acid of short-chain fatty acid and long-chain fatty acid,

(D-3): a partial ester having a degree of esterification of 1 and a degree of esterification of

Esters of polyhydric alcohols containing at least two partial esters with branched saturated fatty acids.

9. The lubricating composition according to claim 8, wherein the lubricating oil composition is a hydraulic oil.