JP2015203055A - lubricant composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricant composition having improved load resistance.SOLUTION: This invention provides an amide gelatinous lubricant composition containing: a lubricant base oil; fatty acid amide; and a borazine compound represented by general formula (1). (In formula (1), R-Reach independently represent a C1-30 hydrocarbon group.)

Description

  The present invention relates to a lubricant composition.

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

  Most of the components that make up these mechanical parts are made of metal, but if the metals come into contact with each other and friction occurs, heat, wear, seizure, etc. will occur at the contact parts, resulting in a lubricant or mechanical part. The life of the product itself is shortened. For semi-solid greases, various additives including solid lubricants such as graphite, molybdenum disulfide, hexagonal boron nitride, etc. are added to the grease in order to improve the lubrication performance of the grease there. Is known (patent documents 2 to 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, the use conditions have become stricter as machine parts become higher performance and smaller and lighter, 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 amide-based gel lubricants.

International Publication No. 2006/051671 Pamphlet JP 2006-089575 A JP 2007-186698 A JP 2009-221307 A JP 2008-231293 A

  Then, this invention makes it a subject to provide the lubricant composition which improved load bearing ability.

  The inventors of the present invention are compounds having a basic skeleton of a BN six-membered ring, which is the smallest unit constituting hexagonal boron nitride (h-BN), that is, a borazine compound, in which a substituent satisfies a certain condition. However, it has been found that it has the effect of increasing the load bearing capacity of the amide-based gel lubricant, and has completed the present invention.

  A first aspect of the present invention is an amide-based gel lubricant composition comprising a lubricating base oil, a fatty acid amide, and a borazine compound represented by the following general formula (1). is there.

［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。］

Wherein ^(1), R 1 ~R ³ are each independently a hydrocarbon group having 1 to 30 carbon atoms. ]

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

  ADVANTAGE OF THE INVENTION According to this invention, the lubricant composition which improved load bearing ability can be provided.

  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 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; ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate 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 the fat 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 in order for the lubricant composition to maintain an appropriate viscosity. More preferably, it is 5-500 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.

  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. 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) Fatty acid amide>
The fatty acid amide compound in the lubricant composition of the present invention is a fatty acid amide compound having one or more amide groups (—NH—CO—), and is represented by the following general formulas (2) to (4) One or more compounds selected from can be preferably used. The fatty acid amide compound represented by the following general formula (2) is a monoamide having one amide group, the fatty acid amide compound represented by the following general formula (3) and the fatty acid represented by the following general formula (4) The amide compound is a bisamide having two amide groups.

（式（２）中、Ｒ^４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^５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 Formula (2), R ⁴ is a saturated or unsaturated chain hydrocarbon group having 5 to 25 carbon atoms or a hydroxy-substituted chain hydrocarbon group, and R ⁵ 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（３）及び式（４）において、Ｒ^６、Ｒ^７、Ｒ^８及びＲ^９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 (3) and Formula (4), R ⁶ , R ⁷ , R ⁸ and R ⁹ 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 As a substituent, 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 are bonded to the phenylene group 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 formula (1) 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, in formula (1), R ⁴ and R ⁵ are each independently a monoamide compound having a saturated chain hydrocarbon group having 12 to 20 carbon atoms, and / or at least one of R ⁴ and R ⁵ 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 (3) is a diamine acid amide, and the bisamide compound represented by the above formula (4) is a dicarboxylic acid amide.
Specific examples of the bisamide compound represented by formula (3) 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 (4) include N, N′-distearyl sebacic acid amide.

Among these bisamide compounds, as in the case of the monoamide compound, R ⁶ and R ⁷ in the formula (3) are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms, a bisamide compound of the formula (4) A bisamide compound in which R ⁸ and R ⁹ are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms, and at least one of R ⁶ and R ⁷ in formula (3) 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 ⁸ and R ^{9 in} the formula (4) having 12 to 20 carbon atoms (for lubricating film retention) One or more bisamide compounds selected from bisamide compounds (more preferably an oleyl group) can be preferably employed, and R ⁶ and R ⁷ in formula (3) are each independently saturated with 12 to 20 carbon atoms. A bisamide compound which is a sum chain hydrocarbon group and / or a bisamide compound wherein R ⁸ and R ^{9 in} formula (4) are each independently a saturated chain hydrocarbon group having 12 to 20 carbon atoms, and A bisamide compound in which at least one of R ⁶ and R ⁷ 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 R ^{8 in the} formula (4) And a mixture with a bisamide compound in which at least one of R ⁹ is an unsaturated chain hydrocarbon group having 12 to 20 carbon atoms (more preferably an oleyl group from the viewpoint of retaining a lubricating film) can be more preferably employed. 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 it 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, and the molecular weight is preferably 100 to 1000. More preferably, it is 150-800.

  The content of the fatty acid amide compound 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.

Examples of the hydrocarbon group of R ¹ to R ³ can be employed C1-30 as, specifically, may have an alkyl group (cycloalkyl ring, the substitution position on the ring structure 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).

  In addition, as a cycloalkyl ring, C5-C7 cycloalkyl rings, such as a cyclopentyl ring, a cyclohexyl ring, a cycloheptyl ring, can be illustrated. 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 (ie, straight-chain or branched-chain) hydrocarbon groups that do not have a ring structure, in terms of being able to further increase the load bearing capacity. More preferably.

The carbon number 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.

Also, in that it is easy to manufacture borazine compound, it is preferred that R ¹ to R ³ are the same group.

  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 grease 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 It is 0.1 mass% or more, More preferably, it is 0.5 mass% or more, Preferably it is 10 mass% or less, More preferably, it is 8 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, in this case, the substitution mode of the borazine compound represented by the general formula (1) is classified into (a) N-aliphatic substitution type and (b) N-aromatic substitution type. Can do. Hereinafter, examples of synthesis methods will be described for each type of (A) and (B).

(Production of borazine compound: (i) 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 (5), 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 (6), 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 (7), trichloroborane BCl ₃ and ammonium halide RNH ₃ X such as alkylammonium chloride (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 (8). It is also possible to do. Details of the reaction conditions of the first stage reaction (formula (7)) are disclosed in, for example, Japanese Patent Application Laid-Open No. 2005-112723 and Japanese Patent Application Laid-Open No. 2005-104869. The second stage reaction (formula (8)) is well known.

(Production of borazine compound: (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 (9), 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 (10). It is a method to reduce. Details of the reaction conditions of the first stage reaction (formula (9)) are disclosed in, for example, JP-A-2005-170857. The second stage reaction (formula (10)) 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, but 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 possible to synthesize a borazine compound 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, graphite fluoride, melamine cyanurate, polytetrafluoroethylene, molybdenum disulfide, antimony sulfide, boron nitride, and alkali (earth) metal borate. When these solid lubricants are contained in the grease 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 grease composition of the present invention, the content 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 lubricant composition of the present invention, since the load bearing capacity is improved, the content of the sulfur-based extreme pressure agent can be reduced as compared with the conventional, and the lubricant does not contain a sulfur-based extreme pressure agent. It can also be a composition. 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 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 is usually 0.01 to 5% by mass based on the total amount of the composition.

  Specific examples of rust inhibitors include metal soaps; polyhydric 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 is usually 0.1 to 30% by mass based on the total amount of the composition.

(Use)
Since the amide-based gel lubricant composition of the present invention has an improved load capacity by containing the borazine compound of the above general formula (1), the lubrication condition is not to mention lubrication of general machine parts. However, it can be preferably used for lubricating severe gears.

Examples of the form of the amide gel lubricant composition according to the first aspect of the present invention include the following [1] to [24].
[1] A form containing a lubricating base oil, a fatty acid amide, and 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］上記［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。
［３］上記［１］又は［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。
［４］上記［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。
［５］上記［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。
［６］上記［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。
［７］上記［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。
［８］上記［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。
［９］上記［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。
［１０］上記［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。
［１１］上記［１］〜［１０］のいずれかにおいて、上記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。
［１２］上記［１１］において、上記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。
［１３］上記［１１］において、上記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。
［１４］上記［１１］〜［１３］のいずれかにおいて、上記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。
［１５］上記［１１］〜［１３］のいずれかにおいて、上記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。
［１６］上記［１］〜［１５］のいずれかにおいて、上記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。
［１７］上記［１６］において、上記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。
［１８］上記［１］〜［１７］のいずれかにおいて、上記脂肪酸アミドが、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。
［１９］上記［１］〜［１８］のいずれかにおいて、上記脂肪酸アミドが、下記一般式（２）〜（４）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] In the above [1], R ^{1 to} R ³ are each independently a chain hydrocarbon group having no ring structure.
[3] In the above [1] or [2], R ^{1 to} R ³ are each independently a linear hydrocarbon group.
[4] In any one of the above [1] to [3], R ^{1 to} R ³ are each independently an alkyl group or an alkenyl group.
[5] A form in which in any one of the above [1] to [4], R ^{1 to} R ³ each independently have 6 or more carbon atoms.
[6] In any one of [1] to [5] above, R ^{1 to} R ³ each independently have 8 or more carbon atoms.
[7] In any one of the above [1] to [6], R ^{1 to} R ³ each independently have 12 or more carbon atoms.
[8] In any one of the above [1] to [7], R ^{1 to} R ³ each independently have 16 or more carbon atoms.
[9] A form in which in any one of the above [1] to [8], R ^{1 to} R ³ each independently has 24 or less carbon atoms.
[10] The form in which R ^{1 to} R ³ are the same group in any one of the above [1] to [9].
[11] The form according to any one of [1] to [10], wherein the content of the borazine compound is 0.01 to 20% by mass based on the total amount of the composition.
[12] In the above [11], the content of the borazine compound is 0.1% by mass or more based on the total amount of the composition.
[13] The form according to [11], wherein the content of the borazine compound is 0.5% by mass or more based on the total amount of the composition.
[14] In any one of the above [11] to [13], the content of the borazine compound is 10% by mass or less based on the total amount of the composition.
[15] The form according to any one of [11] to [13], wherein the content of the borazine compound is 8% by mass or less based on the total amount of the composition.
[16] The form according to any one of [1] to [15], wherein the content of the lubricating base oil is 50 to 98% by mass based on the total amount of the composition.
[17] The form according to [16], wherein the content of the lubricating base oil is 96% by mass or less based on the total amount of the composition.
[18] The form according to any one of [1] to [17], wherein the fatty acid amide is one or more selected from fatty acid amide compounds having a melting point of 40 to 200 ° C.
[19] In any one of the above [1] to [18], the fatty acid amide is one or more selected from fatty acid amide compounds represented by the following general formulas (2) to (4).

（式（１）中、Ｒ^４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^５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 Formula (1), R ⁴ is a saturated or unsaturated chain hydrocarbon group or hydroxy-substituted chain hydrocarbon group having 5 to 25 carbon atoms, and R ⁵ 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（３）及び式（４）において、Ｒ^６、Ｒ^７、Ｒ^８及びＲ^９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。）
［２０］上記［１］〜［１９］のいずれかにおいて、上記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。
［２１］上記［２０］において、上記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。
［２２］上記［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。
［２３］上記［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。
［２４］上記［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 (3) and Formula (4), R ⁶ , R ⁷ , R ⁸ and R ⁹ 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 As a substituent, 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 are bonded to the phenylene group A divalent hydrocarbon group having 7 to 10 carbon atoms or a hydroxy-substituted hydrocarbon group having an introduced structure.)
[20] The form according to any one of [1] to [19], wherein the content of the fatty acid amide is 2 to 50% by mass based on the total amount of the composition.
[21] The form according to [20], wherein the content of the fatty acid amide is 40% by mass or less based on the total amount of the composition.
[22] In any one of the above [1] to [21], one or more additives selected from a solid lubricant, an extreme pressure agent, an antioxidant, an oily agent, a rust inhibitor, and a viscosity index improver. Further containing form.
[23] The form in which the content of the extreme pressure agent containing sulfur element is 0 to 5% by mass in any one of the above [1] to [22].
[24] In any one of the above [1] to [23], the content of the extreme pressure agent containing sulfur element is 0 to 3% by mass.

Moreover, the following [25] can be mentioned as an example of the form of the borazine compound additive which concerns on the 2nd aspect of this invention.
[25] A borazine compound additive represented by the above general formula (1), which is used in the lubricant composition according to any one of [1] to [24].

  Hereinafter, based on an Example and a comparative example, it demonstrates further more concretely about this invention. However, the present invention is not limited to these examples.

<Examples 1-2 and Comparative Examples 1-2>
As shown in Table 1, a lubricant composition of the present invention (Examples 1 and 2) and a comparative lubricant composition (Comparative Examples 1 and 2) 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 1-2 and Comparative Examples 1-2, a ball-on-disk reciprocating friction tester (Optimol SRV friction tester, steel ball 10 mm in diameter, disk 24 mm in diameter. The load carrying capacity was evaluated using 7.9 mm, which is equivalent to the material SUJ-2. Apply the lubricant composition of the sample to the surface of the disk, and increase the load stepwise in the order of 50N, 100N, 200N, 300N, 400N, 500N under the friction conditions of temperature 40 ° C, frequency 50Hz, amplitude 1.0mm. Each load was subjected to reciprocal friction for 5 minutes, and the load (seizure load) when seizure occurred and the friction coefficient increased greatly was recorded. The measurement results are also shown in Table 1.

  As can be seen from Table 1, the lubricant compositions of Examples 1 and 2 are significantly improved in load bearing capacity compared to the lubricant composition of Comparative Example 1 that does not contain the borazine compound of the general formula (1). showed that. This result shows that the lubricant composition of Comparative Example 2 containing boron nitride particles, which is a known solid lubricant, instead of the borazine compound of the general formula (1) has an 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 1 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 1-2. Improved twice.

  From these results, it was shown that the amide-based gel lubricant composition according to the first aspect of the present invention has an improved load capacity. At the same time, it is shown that the borazine compound additive according to the second aspect of the present invention effectively acts to improve the load carrying capacity in the amide-based gel lubricant composition according to the first aspect of the present invention. It was done.

Claims (8)

Lubricating base oil,
Fatty acid amides;
An amide gel lubricant composition comprising a borazine compound represented by the following general formula (1).

Wherein ^(1), R 1 ~R ³ are each independently a hydrocarbon group having 1 to 30 carbon atoms. ] 2. 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.   The lubricant composition according to any one of claims 1 to 5, wherein the content of the borazine compound is 0.01 to 20% by weight based on the total amount of the composition.   The lubricant composition according to any one of claims 1 to 6, wherein the fatty acid amide is one or more 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 7,
A borazine compound additive represented by the general formula (1).