JPH1017881A - Lubricating oil composition for sliding guide face - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricating oil compsn. which is excellent in lubricating characteristics on a sliding guide face and separability from a water-soluble cutting fluid and which exerts no ill influence on the properties of the water-soluble cutting fluid. SOLUTION: This compsn. comprises at least one member selected from among mineral oils, fatty oils and fats, and synthetic oils as a base oil and further contains (A) a carboxylic acid and/or as ester and (B) an amide compd. obtained by reacting a polyamine compd. of the formula: R<1> -(NH-R<2> )m -NH2 (wherein R<1> represents a hydrogen atom or a 1-24C alkyl or alkenyl group; R<2> represents a 2-4C divalent saturated hydrocarbon group; and m represents a number of 1 to 8) with an 8-24C fatty acid or a fatty acid derivative having an 8-24C fatty acid moiety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil composition for a sliding guide surface, and more particularly, to a lubricating oil composition for a sliding guide surface having excellent lubricating properties on the sliding guide surface and excellent separability from a water-soluble cutting fluid. About things.

[0002]

2. Description of the Related Art Many machine tools have a structure in which lubricating oil for a slide guide surface is mixed into a machining fluid of a workpiece. In particular, when a water-soluble cutting fluid is used as the machining fluid, the mixing of this sliding guide surface lubricant deteriorates the water-soluble cutting fluid (decreases cutting performance, accelerates rot, shortens the oil refining life, waste fluid treatment cost) Increase) is one of the causes. Therefore, the lubricating oil for the sliding guide surface has excellent lubricating properties on the sliding guide surface, and also has excellent separability from the water-soluble cutting fluid when mixed with the water-soluble cutting fluid. It is required that the performance of the water-soluble cutting fluid is not adversely affected.

[0003]

However, the additives for improving the lubricating properties usually used for the lubricating oil for the sliding guide surface reduce the separability from the water-soluble cutting fluid, and the lubricating properties of the conventional lubricating oils are reduced. It has been difficult to obtain a sliding guide surface lubricating oil that is excellent in both of its separability from a water-soluble cutting fluid. An object of the present invention is to provide excellent lubrication properties on a sliding guide surface, excellent separation from a water-soluble cutting fluid when mixed with a water-soluble cutting fluid, and do not adversely affect various properties of the water-soluble cutting fluid. An object of the present invention is to provide a lubricating oil composition for a sliding guide surface.

[0004]

The present inventors have conducted intensive studies to overcome the above-mentioned problems, and as a result, a lubricating oil composition having a specific composition has excellent lubricating properties and is not compatible with a water-soluble cutting fluid. The inventors have found that the present invention has excellent separability, and have completed the present invention.

That is, the present invention relates to (A) wherein at least one selected from mineral oils, fats and oils and synthetic oils is used as a base oil;
It is obtained by reacting a carboxylic acid and / or ester and (B) a polyamine compound represented by the following formula (1) with a fatty acid having 8 to 24 carbon atoms or a fatty acid derivative having 8 to 24 carbon atoms in the fatty acid portion. Amide compound R ¹ — (NH—R ² ) _m —NH ₂ (1) (wherein, R ¹ represents a hydrogen atom or an alkyl or alkenyl group having 1 to 24 carbon atoms, and R ² represents a ^{2 to 2} carbon atoms)
4 represents a divalent saturated hydrocarbon group, and m represents a number from 1 to 8).

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The lubricating oil composition for a sliding guide surface of the present invention comprises at least one selected from mineral oil, fat and oil and synthetic oil as a base oil. Examples of the mineral base oil usable in the present invention include solvent removal, solvent extraction, hydrocracking, and solvent removal for lubricating oil fractions obtained by distilling crude oil under normal pressure and reduced pressure. And paraffinic or naphthenic mineral oils obtained by appropriately combining one or more purification means such as catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment.

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

[0008] As synthetic oils, for example, poly-α-
Olefins (ethylene-propylene copolymer, polybutene, 1-octene oligomer, 1-decene oligomer,
And hydrides thereof), alkyl benzene, alkyl naphthalene, monoester (butyl stearate, octyl laurate), diester (ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-
2-ethylhexyl sebacate, etc.), polyester (such as trimellitate), polyol ester (trimethylolpropane caprylate, trimethylolpropaneperargonate, pentaerythritol-2)
-Ethylhexanoate, pentaerythritol pelargonate, etc.), polyoxyalkylene glycol, polyphenyl ether, dialkyl diphenyl ether,
Phosphate esters (tricresyl phosphate, etc.),
Examples include fluorinated compounds (such as perfluoropolyethers and fluorinated polyolefins), silicone oils and the like. However, when an ester is used as the component (A),
Among the above-mentioned synthetic oils, esters such as monoester, diester, polyester and polyol ester are excluded.

As the base oil of the lubricating oil composition for a sliding guide surface of the present invention, the above-described base oil may be used alone,
More than one kind may be combined. The viscosity of the base oil used in the present invention is not particularly limited.
Preferably has kinematic viscosity in the range of 10 to 500 mm ² / s at ° C., it is more preferably in the range of 15~250mm ² / s.

The component (A) of the present invention comprises a carboxylic acid (A-
1) and / or esters (A-2). (A-
1) As the carboxylic acid, one carboxyl group is contained in the molecule.
Or a polycarboxylic acid having two or more carboxyl groups in the molecule. As the monocarboxylic acid, a fatty acid having 6 to 24 carbon atoms is usually used. Further, it may be linear or branched, and may be a saturated fatty acid or an unsaturated fatty acid.

Specific examples of the fatty acid having 6 to 24 carbon atoms include linear or branched hexanoic acid, linear or branched heptanoic acid, linear or branched octanoic acid, and straight-chain or branched octanoic acid. Linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecanoic acid, linear or branched tridecanoic acid, Linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecanoic acid, linear or branched octadecanoic acid,
Linear or branched nonadecanoic acid, linear or branched icosanoic acid, linear or branched henicosanoic acid, linear or branched docosanoic acid, linear or branched tricosanoic acid, Saturated fatty acids such as linear or branched tetracosanoic acid, or linear or branched hexenoic acid, linear or branched heptenic acid, linear or branched octenoic acid, linear or Branched nonenic acid, linear or branched decenoic acid, linear or branched undecenoic acid, linear or branched dodecenoic acid, linear or branched tridecenoic acid, linear or Branched tetradecenoic acid, linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or branched heptadecenoic acid, linear or branched octadecenoic acid, Linear or branched nonadecenoic acid, linear or branched eicosenoic acid, linear or branched henicosenic acid, linear or branched docosenoic acid, linear or branched tricosenoic acid, linear And branched or unsaturated fatty acids such as tetracosenoic acid.

Further, polycarboxylic acids include those having 2 carbon atoms.
Are preferably used, and specifically, for example,
Oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suvalic acid, azelaic acid, sebacic acid, methylmalonic acid, ethylmalonic acid, dimethylmalonic acid, methylsuccinic acid, 2,2-dimethylsuccinic acid, 2,
3-dimethylsuccinic acid, 2-ethyl-2-methylsuccinic acid, 2-methylglutaric acid, 3-methylglutaric acid, 3
-Saturated aliphatic dicarboxylic acids such as methyl adipic acid, unsaturated aliphatic dicarboxylic acids such as maleic acid, fumaric acid, itaconic acid, citraconic acid, and mesaconic acid; Group polycarboxylic acids and the like.

In the present invention, the (A-1) carboxylic acid is preferably a monocarboxylic acid from the viewpoints of stability and lubricity of the composition such as not forming a precipitate, and a straight-chain fatty acid. Is more preferred. Furthermore, among linear fatty acids, those having 8 to 2 carbon atoms are preferred.
2, more preferably 10 to 20 carbon atoms, most preferably 12 to 18 carbon atoms.

The above (A-2) ester is an ester comprising an alcohol and / or phenol and a carboxylic acid. (A-2) The alcohol constituting the ester may be a monohydric alcohol or a dihydric or higher polyhydric alcohol. As the monohydric alcohol, an aliphatic alcohol having 1 to 24 carbon atoms is usually used. As the aliphatic alcohol having 1 to 24 carbon atoms, specifically, for example, methanol, ethanol, linear or branched propanol, linear or branched butanol, linear or branched pentanol, Linear or branched hexanol, linear or branched heptanol,
Linear or branched octanol, linear or branched nonanol, linear or branched decanol, linear or branched undecanol, linear or branched dodecanol, linear or branched Tridecanol, linear or branched tetradecanol, linear or branched pentadecanol, linear or branched hexadecanol, linear or branched heptadecanol, linear Linear or branched octadecanol, linear or branched nonadecanol, linear or branched icosenol, linear or branched henicocenol, linear or branched docosenol, linear or branched Tricocenol, linear or branched tetracocenol, and the like.

As the polyhydric alcohol, 2 to 10
Valent ones are preferably used. Specific examples of the polyhydric alcohol having 2 to 10 valences include ethylene glycol, diethylene glycol, polyethylene glycol (3 to 15 mer of ethylene glycol), propylene glycol, dipropylene glycol, and polypropylene glycol (3 to 15 propylene glycol). Monomer), 1,3-
Propanediol, 1,2-butanediol, 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
-Dihydric alcohols such as pentanediol and neopentyl glycol; glycerin, polyglycerin (2- to 8-mer of glycerin such as diglycerin, triglycerin,
Tetraglycerin, etc.), trimethylolalkanes (trimethylolethane, trimethylolpropane, trimethylolbutane, etc.) and their 2- to 8-mers, pentaerythritol and 2 to 4 of pentaerythritol
Monomer, 1,2,4-butanetriol, 1,3,5-pentanetriol, 1,2,6-hexanetriol,
Polyhydric alcohols such as 1,2,3,4-butanetetrol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, xylitol, mannitol, iditol, talitol, dulcitol, and allitol; xylose, arabinose, ribose, rhamnose, Sugars such as glucose, fructose, galactose, mannose, sorbose, cellobiose, maltose, isomaltose, trehalose, and sucrose can be mentioned.

The (A-2) ester may be an ester composed of the above-mentioned alcohol, or an ester composed of a phenol compound. As the phenol compound used herein, those having 6 to 12 carbon atoms are usually used. Specifically, for example, phenol, methylphenol (also known as cresol) (including all substituted isomers), and ethylphenol (including all substituted isomers) Isomer), dimethylphenol (including all substituted isomers), propylphenol (including all substituted isomers), ethylmethylphenol (including all substituted isomers), trimethylphenol (including all substituted isomers) Isomers), butylphenol (including all substituted isomers),
Pentylphenol (including all substituted isomers), hexylphenol (including all substituted isomers) and the like can be mentioned. As the carboxylic acid constituting the (A-2) ester, specifically, for example, the same ones as those exemplified as the (A-1) carboxylic acid can be used.

(A-2) When a polyhydric alcohol is used as the alcohol constituting the ester, it may be a complete ester in which all of the hydroxyl groups are esterified, and at least one or more of the hydroxyl groups may be esterified. A partial ester remaining as a hydroxyl group which is not formed may be used, but a complete ester is preferable. In this case, only one carboxylic acid may be used, or two or more carboxylic acids may be used.

Similarly, when a polycarboxylic acid is used as the carboxylic acid constituting the (A-2) ester, a complete ester in which all of the carboxyl groups are esterified may be used, and at least one of the carboxyl groups may be used. The above may be a partial ester remaining as a non-esterified carboxyl group, but is preferably a complete ester. In this case, only one kind of alcohol may be used, or two kinds of alcohols may be used.

The component (A-2) is an ester of a monohydric alcohol with a monohydric alcohol in view of stability and lubricity of the composition such that a precipitate is not formed. Diesters with dicarboxylic acids are preferred.

In the present invention, the component (A) may be composed of one compound selected from the above (A-1) and (A-2), or may be a mixture of two or more compounds. It may be.

The upper limit of the content of the component (A) of the present invention is as follows:
40% by mass, preferably 20% by mass, based on the total amount of the composition,
More preferably, it is 10% by mass, most preferably 7% by mass. Even if the content of the component (A) exceeds 40% by mass, no further improvement in the effect is observed, and the storage stability may be deteriorated. The lower limit of the content of the component (A) is 0.01% by mass, preferably 0.05% by mass, more preferably 0.1% by mass, based on the total amount of the composition.
Most preferably, it is 0.2% by mass. If the content of the component (A) is less than 0.01% by mass, the lubricity deteriorates, which is not preferable.

The component (B) of the present invention is represented by the following formula (1) R ^1- (NH-R ² ) _m -NH ₂ (1) wherein R ¹ is a hydrogen atom or an alkyl having 1 to 24 carbon atoms. R ² represents a group having 2 to 2 carbon atoms.
4 represents a divalent saturated hydrocarbon group, m represents a number of 1 to 8) and a fatty acid having 8 to 24 carbon atoms or a fatty acid derivative having 8 to 24 carbon atoms in the fatty acid portion. Is an amide compound obtained by reacting

In the formula (1), R ¹ represents a hydrogen atom or an alkyl or alkenyl group having 1 to 24 carbon atoms, such as a methyl group, an ethyl group, n-propyl group, isopropyl group,
n-butyl group, isobutyl group, sec-butyl group, te
an rt-butyl group, a linear or branched pentyl group, a linear or branched hexyl group, a linear or branched heptyl group,
Linear or branched octyl group, linear or branched nonyl group, linear or branched decyl group, linear or branched undecyl group, linear or branched dodecyl group, linear or branched A tridecyl group, a linear or branched tetradecyl group,
Linear or branched pentadecyl group, linear or branched hexadecyl group, linear or branched heptadecyl group, linear or branched octadecyl group, linear or branched nonadecyl group, linear or branched An alkyl group having 1 to 24 carbon atoms such as an isosyl group, a linear or branched henicosyl group, a linear or branched docosyl group, a linear or branched tricosyl group, a linear or branched tetracosyl group; Vinyl group, linear or branched propenyl group, linear or branched butenyl group, linear or branched pentenyl group, linear or branched hexenyl group, linear or branched heptenyl group, linear or branched Branched octenyl, straight or branched nonenyl, straight or branched decenyl, straight or branched undecenyl, straight or branched dodecenyl, straight or branched tride Nyl, straight or branched tetradecenyl, straight or branched pentadecenyl, straight or branched hexadecenyl, straight or branched heptadecenyl, straight or branched octadecenyl, straight Or a branched nonadecenyl group, a linear or branched icosenyl group, a linear or branched henicocenyl group, a linear or branched docosenyl group, a linear or branched tricosenyl group, a linear or branched tetracosenyl 2 to 2 carbon atoms
24 alkenyl groups.

The alkyl group or alkenyl group represented by R ¹ is preferably a group having 1 to 18 carbon atoms, more preferably a linear group having 1 to 18 carbon atoms. R ¹ is most preferably a hydrogen atom; a linear alkyl group having 1 to 18 carbon atoms;
And 8 straight-chain alkenyl groups.

In the formula (1), R ² is a group having 2 carbon atoms.
It is a divalent saturated hydrocarbon group having from 4 to 4, preferably having 2 to 3 carbon atoms. Specific examples of such a divalent saturated hydrocarbon group include, for example, an ethylene group, an ethylidene group, a trimethylene group, a propylene group, a propylidene group,
And a dimethylmethylene group. Of these, particularly preferred are an ethylene group, a propylene group, and a trimethylene group. M in equation (1) is 1
Represents the number of ８8, preferably the number of １〜1６6.

As the polyamine compound represented by the formula (1), R ¹ is a hydrogen atom or a carbon atom having 1 to 1 carbon atoms from the viewpoint of stability and lubricity of the composition such that a precipitate is not formed.
A linear alkyl group of 18 or a linear alkenyl group of 1 to 18 carbon atoms, wherein R ² is an ethylene group, a propylene group or a trimethylene group, and m is 1 to 6;
Are preferred. Preferable examples of the polyamine compound represented by the formula (1) include, for example,

When R ¹ is a hydrogen atom, ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine; propylenediamine, dipropylenetriamine, tripropylenetetramine, tetrapropylenepentamine, Pentapropylenehexamine, hexapropyleneheptamine; polyamine compounds such as (trimethylene) diamine, bis (trimethylene) triamine, tris (trimethylene) tetramine, tetrakis (trimethylene) pentamine, pentakis (trimethylene) hexamine and hexakis (trimethylene) heptamine

R ¹ is a straight-chain alkyl group having 12 to 18 carbon atoms or a straight-chain alkenyl group having 12 to 18 carbon atoms. Examples include an alkylated polyamine compound to which an alkyl group or a linear alkenyl group having 12 to 18 carbon atoms is bonded.

The fatty acid having 8 to 24 carbon atoms referred to as the component (B) may be a saturated fatty acid or an unsaturated fatty acid. Specific examples of such fatty acids include, for example, linear or branched octanoic acid, linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched Undecanoic acid, linear or branched dodecanoic acid,
Linear or branched tridecanoic acid, linear or branched tetradecanoic acid, linear or branched pentadecanoic acid, linear or branched hexadecanoic acid, linear or branched heptadecanoic acid, Linear or branched octadecanoic acid, linear or branched nonadecanoic acid, linear or branched icosanoic acid, linear or branched henicosanoic acid, linear or branched docosanoic acid, C8-24 saturated fatty acids such as linear or branched tricosanoic acid, linear or branched tetracosanoic acid,
And linear or branched octenoic acid, linear or branched nonenic acid, linear or branched decenoic acid, linear or branched undecenoic acid, linear or branched dodecenoic acid Linear or branched tridecenoic acid, linear or branched tetradecenoic acid, linear or branched pentadecenoic acid, linear or branched hexadecenoic acid, linear or branched heptadecenoic acid Linear or branched octadecenoic acid, linear or branched nonadecenoic acid, linear or branched eicosenoic acid, linear or branched heneicosenoic acid, linear or branched docosenoic acid , Linear or branched tricosenoic acid,
C8-C such as linear or branched tetracosenoic acid
And 24 unsaturated fatty acids.

Among them, particularly preferred are saturated fatty acids having 12 to 18 carbon atoms or unsaturated fatty acids having 12 to 18 carbon atoms, and most preferred are n-dodecanoic acid (lauric acid), n-tridecanoic acid and n-tridecanoic acid. -Tetradecanoic acid (myristic acid), n-pentadecanoic acid, n-hexadecanoic acid (palmitic acid), n-heptadecanoic acid, n-
Octadecanoic acid (stearic acid), n-dodecenoic acid, n
-Tridecenoic acid, n-tetradecenoic acid, n-pentadecenoic acid, n-hexadecenoic acid, n-heptadecenoic acid, n-
12-18 carbon atoms such as octadecenoic acid (oleic acid)
Or a linear unsaturated fatty acid having 12 to 18 carbon atoms.

The fatty acid derivatives having 8 to 24 carbon atoms in the fatty acid portion referred to as the component (B) are acid chlorides, acid anhydrides and esters of fatty acids having 8 to 24 carbon atoms. As the fatty acid derivative having 8 to 24 carbon atoms in the fatty acid portion referred to as the component (B), in particular, acidification of the above-mentioned straight-chain saturated fatty acids having 12 to 18 carbon atoms or straight-chain unsaturated fatty acids having 12 to 18 carbon atoms. , Acid anhydrides and esters are preferred.

The component (B) is an amide compound obtained by reacting a polyamine compound of the formula (1) with a fatty acid having 8 to 24 carbon atoms, or a polyamine compound of the formula (1) and a fatty acid moiety having 8 carbon atoms. An amide compound obtained by reacting with a fatty acid derivative of the formula (1), preferably a polyamine represented by the formula (1) from the viewpoints of stability and lubricity of the composition such as not forming a precipitate. Among the compounds, R ¹ is a hydrogen atom or a linear alkyl group having 1 to 18 carbon atoms, or a linear alkenyl group having 1 to 18 carbon atoms, and R ² is an ethylene group, a propylene group, or a trimethylene group; And a polyamine compound wherein m is a number of 1 to 6, and a linear fatty acid having 12 to 18 carbon atoms, or an acid chloride, acid anhydride or ester of a linear fatty acid having 12 to 18 carbon atoms. An amide compound obtained by reacting is preferable.

The method for producing the amide compound as the component (B) is arbitrary, and can be produced by various known methods. Some examples are shown below. The amide compound of the component (B) is obtained by heating and dehydrating and condensing a polyamine compound represented by the formula (1) and a fatty acid. It is also produced from fatty acid derivatives instead of fatty acids. Specific examples of such an example include a reaction between an acid chloride or an acid anhydride and the polyamine compound. The amide compound of the present invention can be obtained also by this reaction. Furthermore, it is also produced from an aminolysis reaction of the fatty acid methyl ester or ethyl ester with the polyamine compound.

When producing the amide compound as the component (B), it is needless to say that a fatty acid or a fatty acid derivative having a single structure may be used, or a fatty acid or a fatty acid derivative having a different structure may be used. Mixtures may be used.

The amide compound of the component (B) may be a polyamine compound represented by the formula (1) in which all amino groups and imino groups are completely amidated, or a partially amidated one. May be.

In the present invention, the component (B) may be a single compound having a single structure, or a mixture of compounds having different structures as long as it is an amide compound as described above. .

The upper limit of the content of the component (B) in the present invention is 20% by mass, preferably 10% by mass, more preferably 5% by mass, based on the total amount of the composition. If the content of the component (B) exceeds 20% by mass, no further improvement in the effect can be expected, and there is no effect justifying the cost, which is not preferable. 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. When the content of the component (B) is less than 0.01% by mass, the separability from the water-soluble cutting fluid decreases, which is not preferable.

In the present invention, when the components (A) and (B) are added to the base oil, the lubricating properties on the sliding guide surface are excellent, and when mixed with the water-soluble cutting fluid, the base oil is mixed with the water-soluble cutting fluid. A lubricating oil composition for a sliding guide surface which has excellent separability and does not adversely affect various properties of the water-soluble cutting fluid can be obtained. In order to further enhance the excellent properties, the following formula (C) A phosphite represented by 2),
Alternatively, it is desirable to add an amine salt thereof.

(HO) _n -P- (OR ³ ) _3-n (2) (In the above formula (2), R ³ represents a hydrocarbon group having 1 to 24 carbon atoms, and n is an integer of 1 to 2 Represents.)

In the above formula (2), R ³ represents a hydrocarbon group having 1 to 24 carbon atoms.
Specifically, for example, methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, s
ec-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 A nonyl group of a branch, a linear or branched decyl group,
Linear or branched undecyl group, linear or branched dodecyl group, linear or branched tridecyl group, linear or branched tetradecyl group, linear or branched pentadecyl group, linear or branched A hexadecyl group, a linear or branched heptadecyl group, a linear or branched octadecyl group,
Straight or branched nonadecyl group, straight or branched icosyl group, straight or branched henicosyl group, straight or branched docosyl group, straight or branched tricosyl group, straight or branched An alkyl group having 1 to 24 carbon atoms such as a tetracosyl group;

Vinyl, straight or branched propenyl, straight or branched butenyl, straight or branched pentenyl, straight or branched hexenyl, straight or branched heptenyl, Linear or branched octenyl group, linear or branched nonenyl group, linear or branched decenyl group, linear or branched undecenyl group, linear or branched dodecenyl group, linear or branched A tridecenyl group, a linear or branched tetradecenyl group, a linear or branched pentadecenyl group, a linear or branched hexadecenyl group, a linear or branched heptadecenyl group, a linear or branched octadecenyl group, A chain or branched nonadecenyl group, a straight or branched icosenyl group, a straight or branched henicocenyl group, a straight or branched docosenyl group,
An alkenyl group having 2 to 24 carbon atoms, such as a linear or branched tricosenyl group, a linear or branched tetracosenyl group;

A C 5-7 cycloalkyl group such as a cyclopentyl group, a cyclohexyl group or a cycloheptyl group;

Methylcyclopentyl, dimethylcyclopentyl (including all structural isomers), methylethylcyclopentyl (including all structural isomers), diethylcyclopentyl (including all structural isomers), methylcyclohexyl , Dimethylcyclohexyl group (including all structural isomers), methylethylcyclohexyl group (including all structural isomers), diethylcyclohexyl group (including all structural isomers), methylcycloheptyl group, dimethylcycloheptyl group C6-11 alkylcycloalkyl groups such as (including all structural isomers), methylethylcycloheptyl group (including all structural isomers), and diethylcycloheptyl group (including all structural isomers) ;

6-1 carbon atoms such as phenyl and naphthyl
Aryl group of 0:

A tolyl group (including all structural isomers), a xylyl group (including all structural isomers), an ethylphenyl group (including all structural isomers), a linear or branched propylphenyl group (including all structural isomers) Linear or branched butylphenyl groups (including all structural isomers), linear or branched pentylphenyl groups (including all structural isomers), linear or branched A branched hexylphenyl group (including all structural isomers), a linear or branched heptylphenyl group (including all structural isomers), a linear or branched octylphenyl group (including all structural isomers) ), A linear or branched nonylphenyl group (including all structural isomers), a linear or branched decylphenyl group (including all structural isomers), a linear or branched undecyl Phenyl group (all structures Including isomers), an alkylaryl group having 7 to 18 carbon atoms, such as linear or branched dodecylphenyl group (including all structural isomers);

Benzyl, phenylethyl, phenylpropyl (including isomers of propyl), phenylbutyl (including isomers of butyl), phenylpentyl (including isomers of pentyl), phenyl An arylalkyl group having 7 to 12 carbon atoms such as a hexyl group (including isomers of a hexyl group);

In the above formula (2), n represents an integer of 1 to 2, and when n is 1, it represents a phosphite diester;
Is 2, which represents a phosphite monoester. Note that n is 1
In the above case, two R ³ may be the same or different in the same molecule.

The component (C) of the present invention may be a phosphite represented by the formula (2),
The amine salt may be used. As the amine used herein, those having 6 to 24 carbon atoms are used. 6 to 2 carbon atoms
Specific examples of the amine 4 include, for example, triethylamine, dipropylamine (including all isomers), tripropylamine (including all isomers), dibutylamine (including all isomers), tributylamine (Including all isomers), dipentylamine (including all isomers), tripentylamine (including all isomers), monohexylamine (including all isomers), dihexylamine (including all isomers) ), Trihexylamine (including all isomers), monoheptylamine (including all isomers), diheptylamine (including all isomers), triheptylamine (including all isomers) Including), monooctylamine (including all isomers), dioctylamine (including all isomers), trioctylamine (including all isomers) Monononylamine (including all isomers), dinonylamine (including all isomers), monodecylamine (including all isomers), didecylamine (including all isomers), monoundecyl (all isomers) ), Diundecyl (including all isomers), monododecylamine (including all isomers), didodecylamine (including all isomers), dodecyldimethylamine (including all isomers), Monotridecylamine (including all isomers), monotetradecylamine (including all isomers), monopentadecylamine (including all isomers), monohexadecylamine (including all isomers) Alkylamines such as);

Monobenzylamine, (1-phenylethyl) amine, (2-phenylethyl) amine (alias: monophenethylamine), dibenzylamine, bis (1-
Phenylethyl) amine, bis (2-phenylethyl)
Aromatic substituted alkylamines such as amines (alias: diphenethylamine);

Cycloalkylamines having 6 to 21 carbon atoms such as dicyclopentylamine, tricyclopentylamine, monocyclohexylamine, dicyclohexylamine, tricyclohexylamine, monocycloheptylamine, dicycloheptylamine and tricycloheptylamine; (methyl Cyclopentyl) amine (including all substituted isomers), bis (methylcyclopentyl) amine (including all substituted isomers), (dimethylcyclopentyl)
Amines (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), (diethylcyclopentyl) amine (including all substituted isomers), (methylcyclohexyl) amine (all ), Bis (methylcyclohexyl) amine (including all substituted isomers), (dimethylcyclohexyl) 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) ), (Diethylcyclohexyl) amine (including all substituted isomers), (methylcyclohexyl) amine Tyl) amine (including all substituted isomers), bis (methylcycloheptyl) amine (including all substituted isomers), (dimethylcycloheptyl) amine (including all substituted isomers), (ethylcycloheptyl Alkylcycloalkylamines such as amines (including all substituted isomers), (methylethylcycloheptyl) amine (including all substituted isomers), (diethylcycloheptyl) amine (including all substituted isomers);
And mixtures thereof.

When the component (C) is added, the upper limit of the content is 30% by mass, preferably 10% by mass, more preferably 5% by mass, and most preferably 3% by mass based on the total amount of the composition. Is desirable. If the content of the component (C) exceeds 30% by mass, no further improvement in the effect is observed and the cost is increased, which is not preferable. When the component (C) is added, the lower limit of the content is usually 0.0% based on the total amount of the composition.
It is 1% by weight, preferably 0.05% by weight, more preferably 0.1% by weight, most preferably 0.2% by weight.
When the content of the component (C) is less than 0.01% by mass, the effect may not be exhibited.

The lubricating oil composition for a sliding guide surface of the present invention comprises:
Furthermore, in order to enhance its excellent properties as needed, it may be used in a form in which other various additives are blended. Examples of such additives include phenol compounds such as di-tert-butyl-p-cresol and bisphenol A, phenyl-α-naphthylamine, N, N′-di (2-naphthyl) -p-phenylenediamine and the like. Antioxidants such as amine compounds; metal deactivators such as benzotriazole and alkyl thiadiazole; defoamers such as silicone oil and fluorosilicone oil; demulsifiers such as condensation products of ethylene oxide and propylene oxide; polymethacrylate Pour point depressants such as polymethacrylates, polybutenes, polyalkylstyrenes, olefin copolymers, styrene-diene copolymers, styrene-maleic anhydride copolymers and other viscosity index improvers; alkali metals, alkaline earth metals, zinc, lead, etc. Metal sulfonate, phenate, salicile And organic acid salts of bets, and the like.

The sliding guide surface oil lubricating oil composition of the present invention comprises:
When these additives are blended, they may be used alone or in combination of two or more. The amount of addition of these known additives is arbitrary, but it is usually preferable to add an amount such that the total amount of these known additives is 15% by mass or less based on the total amount of the composition.

[0054]

EXAMPLES Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

(Examples 1 to 12) Table 1 (Examples 1 to 12)
5), Table 2 (Examples 6 to 9) and Table 3 (Examples 10 to 10)
A lubricating oil composition for a sliding guide surface according to the present invention was prepared with the composition shown in 12). With respect to these compositions, the positioning performance of a machine tool and the water-soluble cutting fluid separability were evaluated by the following methods. The results are shown in Table 1 (Examples 1 to
5), Table 2 (Examples 6 to 9) and Table 3 (Examples 10 to 10)
It is shown in 12).

Comparative Examples 1 to 7 Compositions for comparison were prepared according to the compositions shown in Table 4 (Comparative Examples 1 to 4) and Table 5 (Comparative Examples 5 to 7). For these compositions, the positioning performance of the machine tool and the water-soluble cutting fluid separability were evaluated in the same manner as in Examples 1 to 12. The results are shown in Tables 4 and 5.

The components used in the examples and comparative examples are as follows. Base oil Base 1: Highly paraffinic solvent refined mineral oil (68.0 mm ²
/ S (@ 40 ° C.)) Group 2: poly-α-olefin (number average molecular weight 1400)
: 3: 3 (volume ratio) mixed oil of trimethylolpropane trilaurate (68.0 mm ² / s (@ 40 ° C.))

(A) Component A1: Oleic acid A2: Glycerin triolate

Component (B) B1: N-oleoylethylenediamine B2: N-oleoylpentaethylenehexamine B3: N, N, N, N, N, N-hexaoleoylpentaethylenehexamine B4: Nn-octyl -N'-oleoyl pentaethylene hexane

Component (C) C1: Dioleyl phosphite C2: Dilauryl phosphite C3: 2-ethylhexylamine salt of dioleyl phosphite

(D) Other components D1: pentaethylenehexamine

(Positioning Performance of Machine Tool) A roundness meter was set on a processing table, and the circularity (μm) when the circular motion was performed on the XY plane was measured under the following test conditions. It is determined that the smaller this value is, the higher the positioning performance is. Test conditions Roundness measuring device: CMD (manufactured by Makino Milling) Machining center: UB-75-II (manufactured by Nissei Urawa) Measuring surface: XY plane Circular radius of motion: 150 mm Feeding speed: 300 mm / min Measurement points: 1887 point / 360deg

(Solution of Water-soluble Cutting Fluid) 25 mL of a sample oil and 75 mL of a water-soluble cutting fluid were collected in a 100 mL measuring knife cylinder, shaken at room temperature for 1 minute, and then observed for a predetermined time after separation. The following were used as the water-soluble cutting fluid. Emulsion type cutting fluid (JIS K 2241 "Cutting oil" W1 type 1 equivalent, dilution ratio 10 times) Soluble type cutting fluid (JIS K 2241 "Cutting oil" W2 type 1 equivalent, dilution ratio 30 times)

The determination of the state of separation was performed as follows. Determination of Separation Conditions In observing the separation conditions, the names of the respective separation layers were determined as shown in FIG. 1, and the volume (mL) of each layer was measured.

[0065]

[Table 1]

[0066]

[Table 2]

[0067]

[Table 3]

[0068]

[Table 4]

[0069]

[Table 5]

As is clear from the results in Tables 1 to 3, the lubricating oil composition for a sliding guide surface according to the present invention (Examples 1 to 3)
5) is excellent in positioning accuracy, excellent in separation from water-soluble cutting oil, and further, as a component (C), a phosphite or an amine of a phosphite represented by the formula (2). When the salt is added (Examples 6 to 12), it can be seen that the separation from water-soluble cutting oil is excellent and the positioning accuracy is further excellent. In contrast, Table 4
~ As is clear from the results in Table 5, when the component (A) is not contained (Comparative Examples 3 to 6), when the component (B) is not contained (Comparative Examples 1 and 2), and the amide compound of the component (B) When a non-amidated polyamine (D1) is used instead of (1) (Comparative Example 7), the positioning accuracy is poor and the separability from the water-soluble cutting fluid is poor.

[0071]

Industrial Applicability The lubricating oil composition for a sliding guide surface of the present invention has excellent lubricating properties on the sliding guide surface, and has excellent separability from a water-soluble cutting fluid when mixed with a water-soluble cutting fluid, and A lubricating oil composition for a sliding guide surface that does not adversely affect the performance of the water-soluble cutting fluid. When a phosphite or an amine salt of a phosphite represented by a specific formula is further added to the lubricating oil composition for a sliding guide surface of the present invention, the positioning accuracy is further improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating names of respective separation layers in evaluation of water-soluble cutting fluid separation properties.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location C10M 129: 72 129: 74 133: 16) C10N 30:00 40:00 40:02

Claims (1)

[Claims] 1. A base oil comprising at least one selected from mineral oils, fats and oils and synthetic oils, comprising (A) a carboxylic acid and / or an ester and (B) a polyamine compound represented by the following formula (1) and carbon: An amide compound R ^1- (NH-R ² ) _m -NH ₂ (1) obtained by reacting a fatty acid having a number of 8 to 24 or a fatty acid derivative having a fatty acid portion having 8 to 24 carbon atoms. ¹ represents a hydrogen atom or an alkyl group having 1 to 24 carbon atoms or an alkenyl group, and R ² has 2 to 2 carbon atoms.
(4 represents a divalent saturated hydrocarbon group of 4, and m represents a number of 1 to 8).