WO2015156393A1 - Lubricant composition - Google Patents

Abstract

This lubricant composition includes: a lubricant base oil (A); a semi-solid component (B) obtained by making a composition semi-solid; and a borazine compound (C) represented by general formula (1) (in general formula (1), R¹-R³ each independently represent a C1-30 hydrocarbon group).

Description

Lubricant composition

The present invention relates to a lubricant composition.

In general, mechanical parts such as constant speed gears, transmission gears, ball bearings, and roller bearings use grease (semi-solid lubricant) as a lubricant. Further, unlike general greases, an amide gel lubricant containing a fatty acid amide compound is also known (Patent Document 1).

Many of the components that make up these mechanical parts are made of metal, but if the metal comes into contact with each other and friction is generated, heat, wear, seizure, etc. will occur at the contact parts, resulting in grease or the machine part itself. The life of the is shortened. Therefore, it is known to add various additives including solid lubricants such as graphite, molybdenum disulfide, and hexagonal boron nitride to the grease in order to improve the lubricating performance of the grease (Patent Documents 2 to 4). 4). In addition, even with amide-based gel lubricants, a technique for blending solid lubricants such as molybdenum disulfide is known (Patent Document 5).

However, in recent years, as machine parts become more sophisticated and smaller and lighter, their use conditions have become severe, and seizure due to contact between metals tends to occur. Therefore, further improvement in load bearing capacity (that is, seizure prevention performance) is required for grease and amide-based gel lubricant.

International Publication No. 2006/051671 Pamphlet JP 2006-089575 A JP 2007-186698 A JP 2009-221307 A JP 2008-231293 A JP 2008-201729 A JP 2010-173945 A JP 2005-112723 A JP 2005-104869 A JP 2005-170857 A

Therefore, an object of the present invention is to provide a lubricant composition with improved load bearing capacity.

The present inventors have disclosed a compound having a basic skeleton of a BN six-membered ring, which is a minimum unit constituting hexagonal boron nitride (h-BN), that is, a borazine compound, in which a substituent satisfies a certain condition. Has been found to have the effect of increasing the load carrying capacity of grease and amide-based gel lubricants, and the present invention has been completed.

The first aspect of the present invention includes (A) a lubricating base oil, (B) a semi-solid component that makes the composition semi-solid, and (C) a borazine represented by the following general formula (1) It is a lubricant composition characterized by containing a compound.

［式（１）中、Ｒ^１～Ｒ^３はそれぞれ独立に、炭素数１～３０の炭化水素基である。］

[In Formula (1), R ¹ to R ³ each independently represents a hydrocarbon group having 1 to 30 carbon atoms. ]

In one embodiment, the lubricant composition according to the first aspect of the present invention comprises (A) a lubricant base oil, (B) a thickener as a semisolid component (B1), A grease composition comprising the (C) borazine compound represented by the general formula (1).

In another embodiment, the lubricant composition according to the first aspect of the present invention comprises (A) a lubricating base oil, and (B) a fatty acid amide as a semi-solidifying component. (C) A amide-based gel lubricant composition comprising the borazine compound represented by the general formula (1).

The second aspect of the present invention is the above general formula (1) used in the grease composition according to the first aspect of the present invention or the amide-based gel lubricant composition according to the second aspect of the present invention. It is a borazine compound additive represented.

According to the present invention, it is possible to provide a lubricant composition with improved load bearing capacity.

Hereinafter, the present invention will be described in detail. Unless otherwise specified, the notation “A to B” for the numerical values A and B means “A to B”. In this notation, when a unit is attached to only the numerical value B, the unit is also applied to the numerical value A. Further, the terms “or” and “or” mean logical sums unless otherwise specified.

<(A) Lubricating base oil>
Examples of the lubricating base oil in the lubricant composition according to the first aspect of the present invention include mineral oil, synthetic oil, and oil.

Mineral oil is a mineral oil obtained by a method commonly used in the process of manufacturing oils in the oil refining industry, and more specifically, a lubricating oil fraction obtained by subjecting crude oil to atmospheric distillation and vacuum distillation. Examples thereof include mineral oil obtained by subjecting one or more purification treatments such as solvent removal, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment.

Synthetic oils include, for example, poly-α-olefins such as polybutene, 1-octene oligomers and 1-decene oligomers or hydrides thereof; Diesters such as di3-ethylhexyl sebacate; polyol esters such as trimethylolpropane oleate, trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 2-ethylhexanoate, pentaerythritol pelargonate; alkyl naphthalene; alkylbenzene Polyoxyalkylene glycol; polyphenyl ether; dialkyl diphenyl ether; silicone oil, 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.

The above lubricating base oils may be used alone or in combination of two or more lubricating base oils.

The kinematic viscosity at 40 ° C. of the lubricating base oil is preferably 1 to 2000 mm ² / s, more preferably 3 to 1000 mm ² / s, so that the lubricant composition maintains an appropriate viscosity. More preferably, it is 5 to 500 mm ² / s. The viscosity index of the lubricating base oil is not particularly limited, but is preferably 80 or more, more preferably 90 or more.

In the grease composition according to one embodiment of the present invention, the content of the lubricating base oil is preferably 60% by weight or more, more preferably 70% by weight or more based on the total amount of the composition. When the content of the lubricating base oil is less than 60% by mass, it tends to be difficult to obtain good lubricity. The content of the lubricating base oil is preferably 98% by mass or less, more preferably 96% by mass or less, based on the total amount of the composition. When the content of the lubricating base oil exceeds 98% by mass, it tends to be difficult to make the composition sufficiently grease (semi-solid).

In the amide-based gel lubricant composition according to another embodiment of the present invention, the content of the lubricating base oil is preferably 50% by weight or more, more preferably 60% by weight or more, based on the total amount of the composition. It is. When the content of the lubricating base oil is less than 50% by mass, it tends to be difficult to obtain good lubricity. The content of the lubricating base oil is preferably 98% by mass or less, more preferably 96% by mass or less, based on the total amount of the composition. When the content of the lubricating base oil exceeds 98% by mass, it tends to be difficult to make the composition sufficiently semi-solid.

<(B) Semi-solid component>
The (B) semi-solidifying component in the lubricant composition of the present invention is a component having an action of making the lubricant composition semi-solid. As the (B) semi-solidifying component that can be used in the lubricant composition of the present invention,
Examples include (B1) thickeners and (B2) fatty acid amides.

<(B1) Thickener>
Examples of the thickener (B1) in the grease composition according to the embodiment of the present invention include soap thickeners such as metal soap and composite metal soap, benton, silica gel, urea thickener (urea compound, urea). All types of thickeners such as non-soap thickeners such as urethane compounds and urethane compounds can be used. Among these, a soap-based thickener and a urea-based thickener can be preferably used from the viewpoint of the effect of preventing damage on the lubricating surface.

Examples of the soap-based thickener include sodium soap, calcium soap, aluminum soap, lithium soap, and the like. Among these, lithium soap is preferable from the viewpoint of water resistance and thermal stability. Examples of the lithium soap include lithium stearate and lithium-12-hydroxystearate. As the fatty acid constituting the soap, for example, a saturated fatty acid, unsaturated fatty acid, hydroxy fatty acid or a mixture thereof having 6 to 24 carbon atoms can be used.

Examples of urea thickeners include urea compounds, urea / urethane compounds, urethane compounds, and the like. More specifically, examples include diurea compounds, triurea compounds, tetraurea compounds, polyurea compounds (excluding diurea compounds, triurea compounds and tetraurea compounds), urea / urethane compounds, diurethane compounds and the like. Among these, at least one urea-based thickener selected from diurea compounds, urea / urethane compounds, and diurethane compounds can be preferably used. A preferred example of the urea compound can be represented by the following general formula (2). The compound group represented by the following general formula (2) includes diurea compounds, urea-urethane compounds, and diurethane compounds.

In general formula (2), R ⁴ represents a divalent organic group, preferably a divalent hydrocarbon group having 6 to 20 carbon atoms. A and B may be the same or different and each represents a group represented by —NHR ⁵ , —NR ⁶ R ⁷ or —OR ⁸ . R ⁵ , R ⁶ , R ⁷ and R ⁸ may be the same or different and each represents a monovalent organic group, preferably a monovalent hydrocarbon group having 6 to 20 carbon atoms.

The content of the thickener in the grease composition is preferably 2 to 40% by weight based on the total amount of the composition. When the content of the thickener is less than 2% by mass, the effect of adding the thickener becomes insufficient, and it becomes difficult to make the composition sufficiently grease (semi-solid). On the other hand, if the content of the thickener exceeds 40% by mass, the grease composition may become excessively hard and it may be difficult to obtain sufficient lubrication performance. From the same viewpoint, the content of the thickener is more preferably 3% by mass or more, further preferably 4% by mass or more, more preferably 35% by mass or less, and further preferably 25% by mass or less.

<(B2) fatty acid amide>
The (B2) fatty acid amide compound in the amide-based gel lubricant composition according to another embodiment of the present invention is a fatty acid amide compound having one or more amide groups (—NH—CO—). One or more compounds selected from fatty acid amide compounds represented by formulas (3) to (5) can be preferably used. The fatty acid amide compound represented by the following general formula (3) is a monoamide having one amide group, the fatty acid amide compound represented by the following general formula (4) and the fatty acid represented by the following general formula (5) The amide compound is a bisamide having two amide groups.

（式（３）中、Ｒ^９は炭素数５～２５の飽和又は不飽和の鎖状炭化水素基又はヒドロキシ基置換鎖状炭化水素基であり、Ｒ^１０は炭素数５～２５の飽和若しくは不飽和の鎖状炭化水素基若しくはヒドロキシ置換鎖状炭化水素基、又は水素である。）

(In the formula (3), R ⁹ is a saturated or unsaturated chain hydrocarbon group or hydroxy-substituted chain hydrocarbon group having 5 to 25 carbon atoms, and R ¹⁰ is a saturated or unsaturated group having 5 to 25 carbon atoms. Saturated chain hydrocarbon group or hydroxy-substituted chain hydrocarbon group, or hydrogen.)

（式（４）及び式（５）において、Ｒ^１１、Ｒ^１２、Ｒ^１３及びＲ^１４は、それぞれ独立に、炭素数５～２５の飽和又は不飽和の鎖状炭化水素基又はヒドロキシ置換鎖状炭化水素基であり、Ａ^１及びＡ^２はそれぞれ独立に、炭素数１～１０の２価の炭化水素基又はヒドロキシ置換炭化水素基であって、炭素数１～１０のアルキレン基若しくはヒドロキシ置換アルキレン基、フェニレン基若しくはヒドロキシ置換フェニレン基、炭素数７～１０のアルキルフェニレン基若しくはヒドロキシ置換アルキルフェニレン基、又は、アルキル基及びアルキレン基から選ばれる２以上の基がフェニレン基に結合した若しくは置換基として導入された構造を有する炭素数７～１０の２価の炭化水素基若しくはヒドロキシ置換炭化水素基である。）

(In Formula (4) and Formula (5), R ¹¹ , R ¹² , R ¹³ and R ¹⁴ are each independently a saturated or unsaturated chain hydrocarbon group having 5 to 25 carbon atoms or a hydroxy-substituted chain group. A hydrocarbon group, wherein A ¹ and A ² are each independently a divalent hydrocarbon group having 1 to 10 carbon atoms or a hydroxy-substituted hydrocarbon group, and an alkylene group or hydroxy-substituted alkylene having 1 to 10 carbon atoms Two or more groups selected from a group, a phenylene group or a hydroxy-substituted phenylene group, an alkylphenylene group having 7 to 10 carbon atoms or a hydroxy-substituted alkylphenylene group, or an alkyl group and an alkylene group bonded to the phenylene group or as a substituent A divalent hydrocarbon group having 7 to 10 carbon atoms or a hydroxy-substituted hydrocarbon group having an introduced structure.)

Specific examples of the monoamide compound represented by the above formula (3) include saturated fatty acid amides such as lauric acid amide, palmitic acid amide, stearic acid amide, behenic acid amide and hydroxystearic acid amide; oleic acid amide and erucic acid amide Unsaturated amides such as stearyl stearic acid amide, oleyl oleic acid amide, oleyl stearic acid amide, stearyl oleic acid amide, etc., substituted amides of saturated or unsaturated long chain fatty acid and long chain amine, etc. Can be mentioned.
Among these monoamide compounds, R ⁹ and R ¹⁰ in the formula (3) are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms, and / or at least one of R ⁹ and R ¹⁰ Is preferably a monoamide compound having an unsaturated chain hydrocarbon group having 12 to 20 carbon atoms (more preferably an oleyl group having an unsaturated bond having 18 carbon atoms), and more preferably a mixture of both amide compounds. . Specific examples include oleic amide and oleyl oleic amide.
These monoamide compounds form and hold a thin film on the sliding portion, and ensure a lubricating film holding property that is effective in eliminating seizure troubles.

The bisamide compound represented by the above formula (4) is a diamine acid amide, and the bisamide compound represented by the above formula (5) is a dicarboxylic acid amide.
Specific examples of the bisamide compound represented by the formula (4) include ethylene bis stearic acid amide, ethylene bisisostearic acid amide, ethylene bis oleic acid amide, methylene bis lauric acid amide, hexamethylene bis oleic acid amide, hexamethylene bis amide. Examples thereof include hydroxystearic acid amide and m-xylylene bis-stearic acid amide.
Specific examples of the amide compound represented by the formula (5) include N, N′-distearyl sebacic acid amide.

Among these bisamide compounds, as in the case of the monoamide compound, R ¹¹ and R ¹² in the formula (4) are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms, a bisamide compound of the formula (5) A bisamide compound in which R ¹³ and R ¹⁴ are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms, and at least one of R ¹¹ and R ¹² in formula (4) is an unsaturated chain structure having 12 to 20 carbon atoms A bisamide compound which is a hydrocarbon group (more preferably an oleyl group), and an unsaturated chain hydrocarbon group having at least one of R ¹³ and R ^{14 in} the formula (5) having 12 to 20 carbon atoms (for lubricating film retention) One or more bisamide compounds selected from bisamide compounds that are more preferably oleyl groups in terms of points can be preferably employed, and R ¹¹ and R ¹² in formula (4) are each independently A bisamide compound which is a saturated chain hydrocarbon group having 12 to 20 carbon atoms and / or a bisamide compound wherein R ¹³ and R ^{14 in} formula (5) are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms; A bisamide compound in which at least one of R ¹¹ and R ^{12 in} the formula (4) is an unsaturated chain hydrocarbon group having 12 to 20 carbon atoms (more preferably an oleyl group in terms of lubricating film retention) and / or the formula More preferred is a mixture with a bisamide compound in which at least one of R ¹³ and R ^{14 in} (5) is an unsaturated chain hydrocarbon group having 12 to 20 carbon atoms (more preferably an oleyl group in terms of lubricating film retention). Can be adopted. Examples of such compounds include ethylene bisoleic acid amide and hexamethylene bisoleic acid amide.

When the fatty acid amide compound is uniformly mixed with the liquid base oil, it forms a gel-like, lubricating composition at room temperature. Therefore, the fatty acid amide compound functions as a semi-solidifying agent that makes the liquid base oil semi-solid (gelled), and melts by frictional heat in a situation where the lubricating properties inherent to the lubricant composition should be exhibited. And act as a liquid lubricant composition. Considering that the fatty acid amide compound is used in a semi-solid state at normal temperature and in a liquid state at high temperature, the melting point of the fatty acid amide compound is preferably 40 to 200 ° C., more preferably 80 to 180 ° C. More preferably, it is 150 to 800.

The content of the fatty acid amide compound in the amide-based gel lubricant composition is usually preferably 2 to 50% by mass based on the total amount of the lubricant composition. When the content of the fatty acid amide compound is less than 2% by mass, it is difficult to form a gel-like composition at room temperature, whereas when the content of the fatty acid amide compound exceeds 50% by mass. Is difficult to handle because the composition becomes too hard. The content of the fatty acid amide compound is more preferably 5% by mass or more, and more preferably 40% by mass or less, based on the total amount of the composition.

<(C) Borazine compound>
The lubricant composition of the present invention contains a borazine compound represented by the following general formula (1).

In the general formula (1), R ¹ to R ³ are each independently a hydrocarbon group having 1 to 30 carbon atoms.

Here, as the hydrocarbon group having 1 to 30 carbon atoms that can be employed as R ¹ to R ³ , specifically, an alkyl group (which may have a cycloalkyl ring, the substitution position on the ring structure is Optional), an alkenyl group (position of the double bond is arbitrary), an aryl group, an alkylaryl group (substitution position on the aromatic ring is arbitrary), and an arylalkyl group (substitution position on the aromatic ring is (Optional).

Examples of the cycloalkyl ring include cycloalkyl rings having 5 to 7 carbon atoms, such as a cyclopentyl ring, a cyclohexyl ring, and a cycloheptyl ring. Examples of the aryl group include a phenyl group and a naphthyl group.

Each hydrocarbon group of R ¹ to R ³ may have a ring structure such as a cycloalkyl ring or an aromatic ring. However, R ¹ to R ³ are preferably chain-type (that is, straight-chain or branched-chain) hydrocarbon groups having no ring structure from the viewpoint of further improving the load bearing capacity. More preferably.

The number of carbon atoms of each hydrocarbon group of R ¹ to R ³ is preferably 6 or more, more preferably 8 or more, still more preferably 12 or more, particularly preferably 16 or more, and preferably 24 It is as follows.

R ¹ to R ³ are preferably the same group from the viewpoint of easy production of the borazine compound.

In the lubricant composition of the present invention, the borazine compound represented by the general formula (1) may be used alone or in combination of two or more. The content of the borazine compound represented by the general formula (1) in the lubricant composition of the present invention is not particularly limited, but is usually 0.01 to 20% by mass based on the total amount of the composition, preferably Is 0.1% by mass or more, more preferably 0.5% by mass or more, and preferably 10% by mass or less, more preferably 8% by mass or less.

The borazine compound represented by the general formula (1) is used as an essential additive in the lubricant composition of the present invention.

(Manufacture of borazine compounds)
The method for producing the borazine compound represented by the general formula (1) is not particularly limited, and a known synthesis method can be appropriately employed.
In order to simplify the description, the case where R ¹ to R ³ are the same hydrocarbon group will be mainly described as an example. In this case, the substitution mode of the borazine compound represented by the general formula (1) can be classified into (a) a type of N-aliphatic substitution and (b) a type of N-aromatic substitution. Hereinafter, examples of synthesis methods will be described for each type of (A) and (B).

(Production of borazine compounds: (a) N-aliphatic substitution)
In the general formula (1), when R ¹ to R ³ are aliphatic groups, for example, as shown in the following formula (6), an alkali borohydride MBH ₄ such as sodium borohydride (M is an alkali metal) And an ammonium halide RNH ₃ X (X is a halogen; R is an aliphatic hydrocarbon group, which may have an aryl group as a substituent) in a solvent, such as an alkylammonium chloride. It can be synthesized by a reaction method. Details of reaction conditions and the like in this method are disclosed in, for example, JP-A-2008-201729.

For example, as shown in the following formula (7), borane (BH ₃ ) complex such as borane-tetrahydrofuran complex or diborane (B ₂ H ₆ ), and nitrile RCN (R is an aliphatic hydrocarbon group, It may be synthesized by a method in which an aryl group may be reacted in a solvent. Details of reaction conditions and the like in this method are disclosed in, for example, JP-A-2010-173945.

For example, as shown in the following formula (8), trichloroborane BCl ₃ and ammonium halide RNH ₃ X such as alkylammonium chloride (where X is a halogen; R is an aliphatic hydrocarbon group, and an aryl group as a substituent) And a trichloroborazine compound by reaction in a solvent, and then synthesized by a method of reducing the trichloroborazine compound with sodium borohydride as shown in the following formula (9). It is also possible to do. Details of the reaction conditions of the first stage reaction (formula (8)) are disclosed in, for example, Japanese Patent Application Laid-Open Nos. 2005-112723 and 2005-104869. The second stage reaction (formula (9)) is well known.

(Production of borazine compounds: (b) N-aromatic substitution)
In the general formula (1), when R ¹ to R ³ are aromatic groups, for example, as shown in the following formula (10), a trihaloborane such as trichloroborane BCl ₃ and an arylamine ArNH ₂ (Ar is An aryl group, which may be substituted with an alkyl group or the like.) And then reacting the trihaloborazine compound with sodium borohydride as shown in the following formula (11). It can be synthesized by the reduction method. Details of the reaction conditions of the first stage reaction (formula (10)) are disclosed in, for example, JP-A-2005-170857. The second stage reaction (formula (11)) is well known.

In the above description regarding the method for producing a borazine compound, the case where R ¹ to R ³ are the same group in the general formula (1) has been described as an example. However, the borazine compound usable in the present invention is in these embodiments. It is not limited. A borazine compound in which R ¹ to R ³ are different from each other can also be used, and such a borazine compound can also be synthesized. For example, it is also possible to synthesize borazine compounds in which R ¹ to R ³ are different from each other by combining two or more ammonium salts and amines used as a borazine skeleton nitrogen source.

<Other additives>
The lubricant composition of the present invention further contains a solid lubricant, an extreme pressure agent, an antioxidant, an oily agent, a rust inhibitor, a viscosity index improver, etc., as necessary, as long as the properties are not greatly impaired. Can do.

Specific examples of the solid lubricant include graphite, fluorinated graphite, melamine cyanurate, polytetrafluoroethylene, molybdenum disulfide, antimony sulfide, boron nitride, and alkali (earth) metal borate. When these lubricants are contained in the lubricant composition of the present invention, the content thereof is usually 0.1 to 20% by mass based on the total amount of the composition.

Specific examples of extreme pressure agents include zinc dialkyldithiophosphates, zinc diaryldithiophosphates, zinc dialkyldithiocarbamates, zinc diaryldithiocarbamates, molybdenum dialkyldithiocarbamates, dihydrocarbyl polysulfides, and sulfurized esters. And sulfur-containing compounds such as thiazole compounds and thiadiazole compounds; and phosphorous extreme pressure agents such as phosphoric acid esters, acidic phosphoric acid esters, amine salts of acidic phosphoric acid esters, and phosphorous acid esters. When these extreme pressure agents are contained in the lubricant composition of the present invention, the content thereof is usually 0.1 to 10% by mass based on the total amount of the composition.

In the lubricant composition of the present invention, since the borazine compound represented by the general formula (1) does not have a sulfur atom, an improvement in load bearing capacity can be achieved while suppressing an increase in the sulfur content. In the grease composition and the amide-based gel lubricant composition of the present invention, since the load carrying capacity is improved, it is possible to reduce the content of the sulfur-based extreme pressure agent as compared with the conventional one. A lubricant composition that does not contain an extreme pressure agent is also possible. For example, the form whose content of the extreme pressure agent containing sulfur element is 5 mass% or less on the basis of the total amount of the composition, more preferably 3 mass% or less can be exemplified. According to such a form, the corrosiveness with respect to the metal part can be reduced or avoided, so that it is possible to further extend the life of the machine part.

Specific examples of the antioxidant include phenol compounds such as 2,6-di-t-butylphenol and 2,6-di-t-butyl-p-cresol; dialkyldiphenylamine, phenyl-α-naphthylamine, p -Amine compounds such as alkylphenyl-α-naphthylamine; sulfur compounds; phenothiazine compounds. When these antioxidants are contained in the lubricant composition of the present invention, the content thereof is usually 0.05 to 5% by mass based on the total amount of the composition.

Specific examples of the oily agent include amines such as laurylamine, myristylamine, palmitylamine, stearylamine and oleylamine; higher alcohols such as lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol and oleyl alcohol; Higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid; fatty acid esters such as methyl laurate, methyl myristate, methyl palmitate, methyl stearate, methyl oleate; laurylamide, myristylamide Amides such as palmitylamide, stearylamide, oleylamide; oils and fats. When these lubricants are contained in the lubricant composition of the present invention, the content thereof is usually 0.01 to 5% by mass based on the total amount of the composition.

Specific examples of the rust inhibitor include metal soaps; partial alcohol partial esters such as sorbitan fatty acid esters; amines; phosphoric acid; When these rust inhibitors are contained in the lubricant composition of the present invention, the content thereof is usually 0.005 to 5% by mass based on the total amount of the composition.

Specific examples of the viscosity index improver include polymethacrylate, polyisobutylene, polystyrene and the like. When these rust inhibitors are contained in the lubricant composition of the present invention, the content thereof is usually 0.1 to 30% by mass based on the total amount of the composition.

(Use)
Since the lubricant composition of the present invention has an improved load bearing capacity by containing the borazine compound of the above general formula (1), not only lubrication of general machine parts but also gears having severe lubrication conditions, etc. It can be preferably used for lubrication.

Examples of the form of the grease composition according to one embodiment of the lubricant composition of the present invention include the following [1.1] to [1.24].
[1.1] A form containing (A) a lubricating base oil, (B1) a thickener, and (C) a borazine compound represented by the following general formula (1).

（式（１）中、Ｒ^１～Ｒ^３はそれぞれ独立に、炭素数１～３０の炭化水素基である。）
　［１．２］上記［１．１］において、Ｒ^１～Ｒ^３がそれぞれ独立に、環構造を有しない鎖式炭化水素基である形態。
　［１．３］上記［１．１］又は［１．２］において、Ｒ^１～Ｒ^３がそれぞれ独立に直鎖の炭化水素基である形態。
　［１．４］上記［１．１］～［１．３］のいずれかにおいて、Ｒ^１～Ｒ^３がそれぞれ独立にアルキル基又はアルケニル基である形態。
　［１．５］上記［１．１］～［１．４］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に６以上である形態。
　［１．６］上記［１．１］～［１．５］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に８以上である形態。
　［１．７］上記［１．１］～［１．６］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に１２以上である形態。
　［１．８］上記［１．１］～［１．７］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に１６以上である形態。
　［１．９］上記［１．１］～［１．８］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に２４以下である形態。
　［１．１０］上記［１．１］～［１．９］のいずれかにおいて、Ｒ^１～Ｒ^３が同一の基である形態。
　［１．１１］上記［１．１］～［１．１０］のいずれかにおいて、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で０．０１～２０質量％である形態。
　［１．１２］上記［１．１１］において、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で０．１質量％以上である形態。
　［１．１３］上記［１．１１］において、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で０．５質量％以上である形態。
　［１．１４］上記［１．１１］～［１．１３］のいずれかにおいて、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で１０質量％以下である形態。
　［１．１５］上記［１．１１］～［１．１４］のいずれかにおいて、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で８質量％以下である形態。
　［１．１６］上記［１．１］～［１．１５］のいずれかにおいて、上記（Ａ）潤滑油基油の含有量が組成物全量基準で６０～９８質量％である形態。
　［１．１７］上記［１．１６］において、上記（Ａ）潤滑油組成物の含有量が組成物全量基準で９６質量％以下である形態。
　［１．１８］上記［１．１］～［１．１７］のいずれかにおいて、上記（Ｂ１）増ちょう剤がリチウム石けん系増ちょう剤およびウレア系増ちょう剤から選ばれる１種以上である形態。
　［１．１９］上記［１．１８］において、上記リチウム石けん系増ちょう剤を構成する脂肪酸が、炭素数６～２４の飽和脂肪酸もしくは不飽和脂肪酸もしくはヒドロキシ脂肪酸またはこれらの組み合わせである形態。
　［１．２０］上記［１．１］～［１．１９］のいずれかにおいて、上記（Ｂ１）増ちょう剤の含有量が組成物全量基準で２～４０質量％である形態。
　［１．２１］上記［１．２０］において、上記（Ｂ１）増ちょう剤の含有量が組成物全量基準で３５質量％以下である形態。
　［１．２２］上記［１．１］～［１．２１］のいずれかにおいて、固体潤滑剤、極圧剤、酸化防止剤、油性剤、さび止め剤、及び粘度指数向上剤から選ばれる１種以上の添加剤をさらに含有する形態。
　［１．２３］上記［１．１］～［１．２２］のいずれかにおいて、硫黄元素を含む極圧剤の含有量が０～５質量％である形態。
　［１．２４］上記［１．１］～［１．２３］のいずれかにおいて、硫黄元素を含む極圧剤の含有量が０～３質量％である形態。

(In formula (1), R ¹ to R ³ are each independently a hydrocarbon group having 1 to 30 carbon atoms.)
[1.2] In the above [1.1], R ¹ to R ³ are each independently a chain hydrocarbon group having no ring structure.
[1.3] In the above [1.1] or [1.2], R ¹ to R ³ are each independently a linear hydrocarbon group.
[1.4] A form in which in any one of the above [1.1] to [1.3], R ¹ to R ³ are each independently an alkyl group or an alkenyl group.
[1.5] A form in which in any one of the above [1.1] to [1.4], R ¹ to R ³ each independently has 6 or more carbon atoms.
[1.6] The form in which in any one of the above [1.1] to [1.5], R ¹ to R ³ each independently has 8 or more carbon atoms.
[1.7] A form in which in any one of the above [1.1] to [1.6], R ¹ to R ³ each independently has 12 or more carbon atoms.
[1.8] The form in which in any one of [1.1] to [1.7] above, R ¹ to R ³ each independently has 16 or more carbon atoms.
[1.9] A form in which in any one of the above [1.1] to [1.8], R ¹ to R ³ each independently has 24 or less carbon atoms.
[1.10] A form in which R ¹ to R ³ are the same group in any one of the above [1.1] to [1.9].
[1.11] In any one of the above [1.1] to [1.10], the content of the (C) borazine compound is 0.01 to 20% by mass based on the total amount of the composition.
[1.12] In the above [1.11], the content of the (C) borazine compound is 0.1% by mass or more based on the total amount of the composition.
[1.13] In the above [1.11], the content of the (C) borazine compound is 0.5% by mass or more based on the total amount of the composition.
[1.14] In any one of the above [1.11] to [1.13], the content of the (C) borazine compound is 10% by mass or less based on the total amount of the composition.
[1.15] In any one of the above [1.11] to [1.14], the content of the (C) borazine compound is 8% by mass or less based on the total amount of the composition.
[1.16] In any one of the above [1.1] to [1.15], the content of the (A) lubricating base oil is 60 to 98% by mass based on the total amount of the composition.
[1.17] In the above [1.16], the content of the (A) lubricating oil composition is 96% by mass or less based on the total amount of the composition.
[1.18] In any one of the above [1.1] to [1.17], the (B1) thickener is at least one selected from lithium soap thickeners and urea thickeners. Form.
[1.19] In the above [1.18], the fatty acid constituting the lithium soap thickener is a saturated fatty acid having 6 to 24 carbon atoms, an unsaturated fatty acid, a hydroxy fatty acid, or a combination thereof.
[1.20] In any one of the above [1.1] to [1.19], the content of the (B1) thickener is 2 to 40% by mass based on the total amount of the composition.
[1.21] In the above [1.20], the content of the (B1) thickener is 35% by mass or less based on the total amount of the composition.
[1.22] In any one of the above [1.1] to [1.21], 1 selected from solid lubricant, extreme pressure agent, antioxidant, oiliness agent, rust inhibitor, and viscosity index improver A form further containing more than one type of additive.
[1.23] In any one of the above [1.1] to [1.22], the content of the extreme pressure agent containing sulfur element is 0 to 5% by mass.
[1.24] In any one of the above [1.1] to [1.23], the content of the extreme pressure agent containing sulfur element is 0 to 3% by mass.

Examples of the form of the amide gel lubricant composition according to another embodiment of the lubricant composition of the present invention include the following [2.1] to [2.27].
[2.1] A form containing (A) a lubricating base oil, (B2) a fatty acid amide, and (C) a borazine compound represented by the following general formula (1).

（式（１）中、Ｒ^１～Ｒ^３はそれぞれ独立に、炭素数１～３０の炭化水素基である。）
　［２．２］上記［２．１］において、Ｒ^１～Ｒ^３がそれぞれ独立に、環構造を有しない鎖式炭化水素基である形態。
　［２．３］上記［２．１］又は［２．２］において、Ｒ^１～Ｒ^３がそれぞれ独立に直鎖の炭化水素基である形態。
　［２．４］上記［２．１］～［２．３］のいずれかにおいて、Ｒ^１～Ｒ^３がそれぞれ独立にアルキル基又はアルケニル基である形態。
　［２．５］上記［２．１］～［２．４］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に６以上である形態。
　［２．６］上記［２．１］～［２．５］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に８以上である形態。
　［２．７］上記［２．１］～［２．６］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に１２以上である形態。
　［２．８］上記［２．１］～［２．７］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に１６以上である形態。
　［２．９］上記［２．１］～［２．８］のいずれかにおいて、Ｒ^１～Ｒ^３の炭素数がそれぞれ独立に２４以下である形態。
　［２．１０］上記［２．１］～［２．９］のいずれかにおいて、Ｒ^１～Ｒ^３が同一の基である形態。
　［２．１１］上記［２．１］～［２．１０］のいずれかにおいて、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で０．０１～２０質量％である形態。
　［２．１２］上記［２．１１］において、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で０．１質量％以上である形態。
　［２．１３］上記［２．１１］において、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で０．５質量％以上である形態。
　［２．１４］上記［２．１１］～［２．１３］のいずれかにおいて、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で１０質量％以下である形態。
　［２．１５］上記［２．１１］～［２．１３］のいずれかにおいて、上記（Ｃ）ボラジン化合物の含有量が、組成物全量基準で８質量％以下である形態。
　［２．１６］上記［２．１］～［２．１５］のいずれかにおいて、上記（Ａ）潤滑油基油の含有量が組成物全量基準で５０～９８質量％である形態。
　［２．１７］上記［２．１６］において、上記（Ａ）潤滑油基油の含有量が組成物全量基準で９６質量％以下である形態。
　［２．１８］上記［２．１］～［２．１７］のいずれかにおいて、上記（Ｂ２）脂肪酸アミドが、融点４０～２００℃の脂肪酸アミド化合物から選ばれる１種以上である形態。
　［２．１９］上記［２．１］～［２．１８］のいずれかにおいて、上記（Ｂ２）脂肪酸アミドの分子量が１００～１０００である形態。
　［２．２０］上記［２．１］～［２．１９］のいずれかにおいて、上記（Ｂ２）脂肪酸アミドが、下記一般式（３）～（５）で表される脂肪酸アミド化合物から選ばれる１種以上である形態。

(In formula (1), R ¹ to R ³ are each independently a hydrocarbon group having 1 to 30 carbon atoms.)
[2.2] In the above [2.1], R ¹ to R ³ are each independently a chain hydrocarbon group having no ring structure.
[2.3] In the above [2.1] or [2.2], R ¹ to R ³ are each independently a linear hydrocarbon group.
[2.4] A form in which in any one of the above [2.1] to [2.3], R ¹ to R ³ are each independently an alkyl group or an alkenyl group.
[2.5] A mode in which in any one of the above [2.1] to [2.4], R ¹ to R ³ each independently have 6 or more carbon atoms.
[2.6] A form in which in any one of the above [2.1] to [2.5], R ¹ to R ³ each independently has 8 or more carbon atoms.
[2.7] A form in which in any one of the above [2.1] to [2.6], R ¹ to R ³ each independently has 12 or more carbon atoms.
[2.8] A form in which in any one of the above [2.1] to [2.7], R ¹ to R ³ each independently have 16 or more carbon atoms.
[2.9] A form in which in any one of the above [2.1] to [2.8], R ¹ to R ³ each independently has 24 or less carbon atoms.
[2.10] The form in which R ¹ to R ³ are the same group in any one of the above [2.1] to [2.9].
[2.11] A form in which the content of the (C) borazine compound in any one of [2.1] to [2.10] is 0.01 to 20% by mass based on the total amount of the composition.
[2.12] In the above [2.11], the content of the (C) borazine compound is 0.1% by mass or more based on the total amount of the composition.
[2.13] In the above [2.11], the content of the (C) borazine compound is 0.5% by mass or more based on the total amount of the composition.
[2.14] In any one of the above [2.11] to [2.13], the content of the (C) borazine compound is 10% by mass or less based on the total amount of the composition.
[2.15] In any one of the above [2.11] to [2.13], the content of the (C) borazine compound is 8% by mass or less based on the total amount of the composition.
[2.16] In any one of the above [2.1] to [2.15], the content of the (A) lubricating base oil is 50 to 98% by mass based on the total amount of the composition.
[2.17] In the above [2.16], the content of the (A) lubricating base oil is 96% by mass or less based on the total amount of the composition.
[2.18] In any one of the above [2.1] to [2.17], the (B2) fatty acid amide is one or more selected from fatty acid amide compounds having a melting point of 40 to 200 ° C.
[2.19] In any one of the above [2.1] to [2.18], the molecular weight of the (B2) fatty acid amide is 100 to 1000.
[2.20] In any one of the above [2.1] to [2.19], the (B2) fatty acid amide is selected from fatty acid amide compounds represented by the following general formulas (3) to (5) One or more forms.

（式（３）中、Ｒ^９は炭素数５～２５の飽和又は不飽和の鎖状炭化水素基又はヒドロキシ基置換鎖状炭化水素基であり、Ｒ^１０は炭素数５～２５の飽和若しくは不飽和の鎖状炭化水素基若しくはヒドロキシ置換鎖状炭化水素基、又は水素である。）

(In the formula (3), R ⁹ is a saturated or unsaturated chain hydrocarbon group or hydroxy-substituted chain hydrocarbon group having 5 to 25 carbon atoms, and R ¹⁰ is a saturated or unsaturated group having 5 to 25 carbon atoms. Saturated chain hydrocarbon group or hydroxy-substituted chain hydrocarbon group, or hydrogen.)

（式（４）及び式（５）において、Ｒ^１１、Ｒ^１２、Ｒ^１３及びＲ^１４は、それぞれ独立に、炭素数５～２５の飽和又は不飽和の鎖状炭化水素基又はヒドロキシ置換鎖状炭化水素基であり；Ａ^１及びＡ^２はそれぞれ独立に、炭素数１～１０の２価の炭化水素基又はヒドロキシ置換炭化水素基であって、炭素数１～１０のアルキレン基若しくはヒドロキシ置換アルキレン基、フェニレン基若しくはヒドロキシ置換フェニレン基、炭素数７～１０のアルキルフェニレン基若しくはヒドロキシ置換アルキルフェニレン基、又は、アルキル基及びアルキレン基から選ばれる２以上の基がフェニレン基に結合した若しくは置換基として導入された構造を有する炭素数７～１０の２価の炭化水素基若しくはヒドロキシ置換炭化水素基 である。）
　［２．２１］上記［２．２０］において、上記（Ｂ２）脂肪酸アミドが、エチレンビスステアリン酸アミド、エチレンビスイソステアリン酸アミド、エチレンビスオレイン酸アミド、メチレンビスラウリン酸アミド、ヘキサメチレンビスオレイン酸アミド、ヘキサメチレンビスヒドロキシステアリン酸アミド、ｍ－キシリレンビスステアリン酸アミド、及びＮ，Ｎ’－ジステアリルセバシン酸アミドから選ばれる１種以上である形態。
　［２．２２］上記［２．２０］又は［２．２１］において、上記（Ｂ２）脂肪酸アミドが、上記式（４）においてＲ^１１及びＲ^１２がそれぞれ独立に炭素数１２～２０の飽和鎖状炭化水素基であるビスアミド化合物、上記式（５）においてＲ^１３及びＲ^１４がそれぞれ独立に炭素数１２～２０の飽和鎖状炭化水素基であるビスアミド化合物、上記式（４）においてＲ^１１及びＲ^１２の少なくとも一方が炭素数１２～２０の不飽和鎖状炭化水素基であるビスアミド化合物、並びに、上記式（５）においてＲ^１３及びＲ^１４の少なくとも一方が炭素数１２～２０の不飽和鎖状炭化水素基であるビスアミド化合物から選ばれる１種以上のビスアミド化合物である形態。
　［２．２３］上記［２．１］～［２．２２］のいずれかにおいて、上記（Ｂ２）脂肪酸アミドの含有量が組成物全量基準で２～５０質量％である形態。
　［２．２４］上記［２．２３］において、上記（Ｂ２）脂肪酸アミドの含有量が組成物全量基準で４０質量％以下である形態。
　［２．２５］上記［２．１］～［２．２４］のいずれかにおいて、固体潤滑剤、極圧剤、酸化防止剤、油性剤、さび止め剤、及び粘度指数向上剤から選ばれる１種以上の添加剤をさらに含有する形態。
　［２．２６］上記［２．１］～［２．２５］のいずれかにおいて、硫黄元素を含む極圧剤の含有量が０～５質量％である形態。
　［２．２７］上記［２．１］～［２．２６］のいずれかにおいて、硫黄元素を含む極圧剤の含有量が０～３質量％である形態。

(In Formula (4) and Formula (5), R ¹¹ , R ¹² , R ¹³ and R ¹⁴ are each independently a saturated or unsaturated chain hydrocarbon group having 5 to 25 carbon atoms or a hydroxy-substituted chain group. Each of A ¹ and A ² independently represents a divalent hydrocarbon group having 1 to 10 carbon atoms or a hydroxy-substituted hydrocarbon group, and is an alkylene group or hydroxy-substituted alkylene having 1 to 10 carbon atoms Two or more groups selected from a group, a phenylene group or a hydroxy-substituted phenylene group, an alkylphenylene group having 7 to 10 carbon atoms or a hydroxy-substituted alkylphenylene group, or an alkyl group and an alkylene group bonded to the phenylene group or as a substituent A divalent hydrocarbon group having 7 to 10 carbon atoms or a hydroxy-substituted hydrocarbon group having an introduced structure.)
[2.21] In the above [2.20], the (B2) fatty acid amide is ethylene bis stearic acid amide, ethylene bisisostearic acid amide, ethylene bisoleic acid amide, methylene bislauric acid amide, hexamethylene bisoleic acid. A form which is at least one selected from amide, hexamethylene bishydroxystearic amide, m-xylylene bis stearic amide, and N, N′-distearyl sebacic amide.
[2.22] In the above [2.20] or [2.21], the (B2) fatty acid amide is a saturated chain having 12 to 20 carbon atoms, wherein R ¹¹ and R ¹² in the above formula (4) are each independently Jo bisamide compound is a hydrocarbon group, the formula (5) in the bisamide compound R ¹³ and R ¹⁴ is a saturated chain hydrocarbon group independently having a carbon number of 12 ~ 20, R ¹¹ and in the above formula (4) A bisamide compound in which at least one of R ¹² is an unsaturated chain hydrocarbon group having 12 to 20 carbon atoms, and at least one of R ¹³ and R ¹⁴ in the above formula (5) is an unsaturated chain having 12 to 20 carbon atoms The form which is 1 or more types of bisamide compounds chosen from the bisamide compound which is a cylindrical hydrocarbon group.
[2.23] In any one of the above [2.1] to [2.22], the content of the (B2) fatty acid amide is 2 to 50% by mass based on the total amount of the composition.
[2.24] In the above [2.23], the content of the (B2) fatty acid amide is 40% by mass or less based on the total amount of the composition.
[2.25] In any one of [2.1] to [2.24] above, 1 selected from solid lubricants, extreme pressure agents, antioxidants, oiliness agents, rust inhibitors, and viscosity index improvers A form further containing more than one type of additive.
[2.26] In any one of the above [2.1] to [2.25], the content of the extreme pressure agent containing sulfur element is 0 to 5% by mass.
[2.27] In any one of the above [2.1] to [2.26], the content of the extreme pressure agent containing sulfur element is 0 to 3% by mass.

Moreover, the following [3.1] can be mentioned as an example of the borazine compound additive which concerns on the 2nd aspect of this invention.
[3.1] represented by the above general formula (1) used in the lubricant composition of any one of [1.1] to [1.24] and [2.1] to [2.26] Borazine compound additive.

Hereinafter, the present invention will be described in more detail based on examples and comparative examples. However, the present invention is not limited to these examples.

<Examples 1 and 2 and Comparative Examples 1 and 2>
As shown in Table 1, grease compositions of the present invention (Examples 1 and 2) and comparative grease compositions (Comparative Examples 1 and 2) were prepared, respectively. In the table, “inmass%” means mass% in the grease base material, and “mass%” means mass% based on the total amount of the composition.

(Evaluation of load bearing capacity)
For each of the grease compositions of Examples 1-2 and Comparative Examples 1-2, a ball-on-disc reciprocating friction tester (Optimol SRV friction tester, steel ball 10 mm in diameter, disc 24 mm in diameter 7 mm .9 mm, both of which are equivalent to the material SUJ-2), and the load bearing capacity was evaluated. Apply the sample grease to the surface of the disk, and increase the load stepwise in the order of 50N, 100N, 200N, 300N, 400N, 500N, 600N under the friction conditions of temperature 40 ° C, frequency 50Hz, amplitude 1.0mm. However, reciprocal friction was performed for 5 minutes for each load, and the load (seizure load) at the time when seizure occurred and the friction coefficient increased greatly was recorded. In the case where seizure did not occur even during operation at a load of 600 N, the seizure load was recorded as exceeding 600 N. The measurement results are also shown in Table 1.

As can be seen from Table 1, the grease compositions of Examples 1 and 2 include the grease composition of Comparative Example 1 that does not contain the borazine compound of the general formula (1) and the borazine compound of the general formula (1). Instead, the load capacity was significantly improved with respect to the grease composition of Comparative Example 2 containing boron nitride particles as a solid lubricant. In particular, the grease composition of Example 1 containing a borazine compound having a linear hydrocarbon group (stearyl group) as a substituent on N does not cause seizure even at the end of the SRV test (load: 600 N). It was.

From these results, it was shown that the grease composition of the present invention has an improved load bearing capacity. At the same time, it was shown that the borazine compound additive of the present invention effectively acts to improve the load bearing capacity in the grease composition of the present invention.

<Examples 3 to 4 and Comparative Examples 3 to 4>
As shown in Table 2, the amide-based gel lubricant composition of the present invention (Examples 3 to 4) and the comparative lubricant composition (Comparative Examples 3 to 4) were prepared. In the table, “inmass%” means mass% in the lubricant base material, and “mass%” means mass% based on the total amount of the composition.

(Evaluation of load bearing capacity)
For each of the lubricant compositions of Examples 3 to 4 and Comparative Examples 3 to 4, the load bearing capacity was evaluated in the same manner as in Examples 1 and 2 and Comparative Examples 1 and 2 described above. The measurement results are also shown in Table 2.

As can be seen from Table 2, the amide-based gel lubricant compositions of Examples 3 to 4 are significantly more resistant to the lubricant composition of Comparative Example 3 that does not contain the borazine compound of the general formula (1). The load capacity was improved. This result shows that the lubricant composition of Comparative Example 4 containing boron nitride particles, which are known solid lubricants, instead of the borazine compound of the general formula (1) has improved load bearing capacity compared to Comparative Example 1. This is in contrast to the points that did not show. In particular, the lubricant composition of Example 3 containing a borazine compound having a long-chain linear hydrocarbon group (stearyl group) as a substituent on N has a seizure load of 2.5 of Comparative Examples 3 to 4. Improved twice.

From these results, it was shown that the amide gel lubricant composition of the present invention has an improved load bearing capacity. At the same time, it has been shown that the borazine compound additive of the present invention effectively acts to improve the load bearing capacity in the amide gel lubricant composition of the present invention.

Claims (11)

(A) a lubricating base oil;
(B) a semi-solid component for making the composition semi-solid,
(C) A lubricant composition containing a borazine compound represented by the following general formula (1).

[In Formula (1), R ¹ to R ³ each independently represents a hydrocarbon group having 1 to 30 carbon atoms. ] The lubricant composition according to claim 1, wherein in the formula (1), R ¹ to R ³ are each independently a chain hydrocarbon group having no cyclic structure. The lubricant composition according to claim 1 or 2, wherein in the formula (1), R ¹ to R ³ are each independently a linear hydrocarbon group. The lubricant composition according to any one of claims 1 to 3, wherein in the formula (1), R ¹ to R ³ each independently have 6 or more carbon atoms. The lubricant composition according to any one of claims 1 to 4, wherein in the formula (1), R ¹ to R ³ are the same group. 6. The lubricant composition according to claim 1, wherein the content of the (C) borazine compound is 0.01 to 20% by weight based on the total amount of the composition. (A) a lubricating base oil;
(B1) a thickener as the (B) semi-solidifying component;
The grease composition according to any one of claims 1 to 6, comprising (C) a borazine compound represented by the general formula (1). The grease composition according to claim 7, wherein the (B1) thickener is at least one selected from lithium soap thickeners and urea thickeners. (A) a lubricating base oil;
(B2) fatty acid amide as the (B) semi-solidifying component,
7. The amide gel lubricant composition according to claim 1, comprising (C) a borazine compound represented by the general formula (1). The lubricant composition according to claim 9, wherein the (B2) fatty acid amide is at least one selected from fatty acid amides having a melting point of 40 to 200 ° C. Used in the lubricant composition according to any one of claims 1 to 11.
A borazine compound additive represented by the general formula (1).