JPH09111278A - Lubricating oil composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lubricating oil composition usable not only as a cutting fluid but also as a lubricating oil for machine tools such as a hydraulic working fluid or a sildeway oil without containing a chlorine-based compound at all from the viewpoint of environment or safety. SOLUTION: This lubricating oil composition comprises (A) a sulfur-based extreme-pressure additive, (B) at least one phosphorus compound selected from a phosphoric ester, a thiophosphoric ester and an amine salt thereof, (C) at least one oxygen-containing compound selected from an ester of a 6-30C fatty acid with a mono- to a hexahydric alcohol and a 6-30C aliphatic alcohol and (D) an organoboron compound based on a base oil for a lubricating oil.

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, and more particularly, when it is used as a lubricating oil for cutting, it can perform good cutting without containing a chlorine-based additive, and further has a hydraulic pressure. The present invention relates to a lubricating oil composition that exhibits good performance even when used as another lubricating oil used in machine tools, such as hydraulic oil and sliding surface oil.

[0002]

2. Description of the Related Art Conventionally, in the field of metal cutting, an oil agent added with a chlorine-based or sulfur-based extreme pressure agent has been used to improve cutting performance. In particular, a chlorine-based compound such as chlorinated paraffin is used. Since it has excellent extreme pressure performance, it was an essential component for cutting fluids. On the other hand, machine tools that perform metal processing, typified by cutting, have various parts that require lubrication, such as sliding surfaces (sliding guide surfaces), hydraulic pumps, gear boxes, etc. The required performance of lubricating oil is not necessarily the same.

Therefore, the lubricating oil used for each part of the machine tool is dedicated to hydraulic oil, sliding surface oil, gear oil, etc.
There was the inconvenience of having to use several types of lubricating oil with one machine. Furthermore, hydraulic oil, sliding surface oil, gear oil, etc. leak and often mix into cutting oil, and the deterioration of cutting oil performance due to the mixing of these lubricating oils has a great adverse effect on machinability and tool life. was there.

[0004]

However, in recent years,
Concerns about the use of chlorine-based additives are increasing due to environmental protection issues, and in fact, in Germany, the chlorine content of waste oil is currently regulated. In addition, as a human safety issue, suspicion regarding carcinogenicity of chlorinated paraffin has been reported in the United States. Therefore, from the viewpoint of environment and safety, it does not contain chlorine-based extreme pressure additives,
There was a rapid demand for the development of new cutting fluids. Also, in the field of cutting, especially in gear cutting where the tool is expensive, the reduction of the tool life due to the mixing of the sliding surface oil into the cutting oil has become an extremely serious problem. It was desired to develop effective measures to solve the problem.

The present invention does not contain chlorine compounds at all from the viewpoint of environment and safety, and can be used not only as cutting oil but also as lubricating oil for machine tools such as hydraulic oil and sliding surface oil. Another lubricating oil composition is provided.

[0006]

Means for Solving the Problems The present inventors have proposed the above-described cutting of sliding surface oil etc. if the machine oil such as hydraulic oil or sliding surface oil and the cutting oil have the same composition. Focusing on the fact that adverse effects due to mixing with oil can be avoided, non-chlorine that shows cutting performance equivalent to or better than that of chlorine and can be used not only as cutting oil but also as hydraulic oil or sliding surface oil. As a result of repeated research to develop a system oil agent, it was found that a lubricating oil having a specific composition satisfies all of these required performances, and the present invention has been completed.

The contents of the present invention will be described in more detail below. The present invention relates to a lubricating base oil, and one or more phosphorus compounds selected from (A) sulfur-based extreme pressure agents, (B) phosphoric acid esters, thiophosphoric acid esters, and amine salts thereof. , (C) fatty acid having 6 to 30 carbon atoms and 1
Esters with hexahydric alcohols and C6-30
The present invention provides a lubricating oil composition comprising one or more oxygen-containing compounds selected from the aliphatic alcohols mentioned above and (D) an organoboron compound.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The lubricating base oil of the present invention is not particularly limited, and any mineral oil or synthetic oil can be used as long as it is usually used as a base oil for lubricating oil. As the mineral oil-based lubricating base oil, for example, a lubricating oil fraction obtained by distilling crude oil under atmospheric pressure and vacuum distillation, solvent degassing, solvent extraction, hydrocracking, solvent dewaxing, catalytic dewaxing, hydrogen Oils such as paraffin-based and naphthene-based oils obtained by appropriately combining chemical purification, purification with sulfuric acid, purification treatment such as clay treatment, and the like can be used.

Examples of synthetic lubricating base oils include poly-α-olefins (polybutene, 1-octene oligomer, 1-decene oligomer, ethylene-propylene copolymer, or hydrides thereof), alkylbenzene, alkylnaphthalene. , Diesters (ditridecyl glutarate, di2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di2-ethylhexyl sebacate, etc.), polyol esters (trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythritol 2-ethyl) Hexanoate, pentaerythritol pelargonate, etc.), polyoxyalkylene glycol, polyphenyl ether, dialkyl diphenyl ether, etc. can be used.

These mineral oil base oils and synthetic base oils may be used alone, or selected from these.
One or more base oils may be used in combination at any mixing ratio. The viscosity of the lubricating base oil used in the present invention is arbitrary, but from the viewpoint of the permeability of the oil agent to the vicinity of the processing point, it is usually preferable to use a kinematic viscosity of 5 to 300 mm ² / s at 40 ° C. It is more preferable to use those having a diameter of ⁸ to 150 mm ² / s.

The component (A) referred to in the present invention is a sulfur-based extreme pressure agent. As the sulfur-based extreme pressure agent, specifically, for example,
One compound or a mixture of two or more compounds selected from dihydrocarbyl polysulfide and sulfurized fats and oils may be mentioned. The dihydrocarbyl polysulfide as used herein is a sulfur-based compound generally called polysulfide or sulfurized olefin, and a typical example thereof is a compound represented by the following general formula (1).

[0012]

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In the general formula (1), R ¹ and R
² separately represents a hydrocarbon group having 3 to 20 carbon atoms, while X represents a number of 2 to 6, preferably 2 to 5.
As R ¹ and R ² , separately, specifically, for example,
n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, linear or branched pentyl group, linear or branched hexyl group,
Straight-chain or branched heptyl group, straight-chain or branched octyl group, straight-chain or branched nonyl group, straight-chain or branched decyl group, straight-chain or branched undecyl group, straight-chain or branched dodecyl group, straight-chain Or a branched tridecyl group, a straight-chain or branched tetradecyl group, a straight-chain or branched pentadecyl group, a straight-chain or branched hexadecyl group, a straight-chain or branched heptadecyl group, a straight-chain or branched octadecyl group, a straight-chain or branched A straight chain or branched alkyl group such as a branched nonadecyl group, a straight chain or branched icosyl group;

Straight chain or branched propenyl group, straight chain or branched butenyl group, straight chain or branched pentenyl group, straight chain or branched hexenyl group, straight chain or branched heptenyl group,
Straight-chain or branched octenyl group, straight-chain or branched nonenyl group, straight-chain or branched decenyl group, straight-chain or branched undecenyl group, straight-chain or branched dodecenyl group, straight-chain or branched tridecenyl group, straight-chain Or a branched tetradecenyl group,
A straight-chain or branched pentadecenyl group, a straight-chain or branched hexadecenyl group, a straight-chain or branched heptadecenyl group, a straight-chain or branched octadecenyl group, a straight-chain or branched nonadecenyl group, a straight-chain or branched icosenyl group, etc. A chain or branched alkenyl group (each alkenyl group includes all structural isomers);

Aryl groups such as phenyl group and naphthyl group; tolyl group, ethylphenyl group, straight chain or branched propylphenyl group, straight chain or branched butylphenyl group, straight chain or branched pentylphenyl group, straight chain or Branched hexylphenyl group, straight chain or branched heptylphenyl group,
Straight-chain or branched octylphenyl group, straight-chain or branched nonylphenyl group, straight-chain or branched decylphenyl group, straight-chain or branched undecylphenyl group, straight-chain or branched dodecylphenyl group, xylyl group, ethyl Methylphenyl group, diethylphenyl group, di (linear or branched) propylphenyl group, di (linear or branched) butylphenyl group, methylnaphthyl group, ethylnaphthyl group, linear or branched propylnaphthyl group, direct Chain or branched butylnaphthyl group, dimethylnaphthyl group, ethylmethylnaphthyl group,
An alkylaryl group such as a diethylnaphthyl group, a di (linear or branched) propylnaphthyl group, a di (linear or branched) butylnaphthyl group (each alkylaryl group includes all structural isomers);

An arylalkyl group such as a benzyl group, a phenylethyl group and a phenylpropyl group (each arylalkyl group includes all structural isomers); and the like can be mentioned.

Of these, as R ¹ and R ² in the general formula (1), separately, an alkyl group having 3 to 18 carbon atoms derived from propylene, 1-butene or isobutylene, or 6 to 6 carbon atoms. The aryl group, alkylaryl group or arylalkyl group of 8 are preferable, and examples of these groups include:

Isopropyl group, branched hexyl group derived from propylene dimer (including all branched isomers), branched nonyl group derived from propylene trimer (all branched groups) (Including isomers), branched dodecyl group derived from propylene tetramer (including all branched isomers), branched pentadecyl group derived from propylene pentamer (all branched) Isomers), branched octadecyl groups derived from propylene hexamers (including all branched isomers), sec-butyl groups, tert-butyl groups, derived from 1-butene dimers. A branched octyl group (including all branched isomers), a branched octyl group derived from an isobutylene dimer (including all branched isomers), 1-butene trimer Derived branched dodecyl groups (all branched ), Branched dodecyl group derived from isobutylene trimer (including all branched isomers), branched hexadecyl group derived from 1-butene tetramer (all units) Alkyl groups such as branched isomers), branched hexadecyl groups derived from isobutylene tetramer (including all branched isomers), and the like;

Phenyl group; alkylaryl group such as tolyl group, ethylphenyl group and xylyl group (each alkylaryl group includes all structural isomers); arylalkyl group such as benzyl group and phenylethyl group (note that , Each arylalkyl group includes all structural isomers);

Further, R ¹ and R ² in the general formula (1) are each independently a branched alkyl group having 3 to 18 carbon atoms, which is derived from propylene or isobutylene from the viewpoint of cutting performance. Is more preferable, and a branched alkyl group having 6 to 15 carbon atoms derived from propylene or isobutylene is particularly preferable.

Specific examples of the sulfurized fats and oils referred to herein include animal and vegetable fats and oils such as beef tallow, lard, fish fat, rapeseed oil and soybean oil; oleic acid, linoleic acid, linolenic acid and these animal and vegetable fats and oils. And unsaturated fatty acids such as fatty acids; unsaturated fatty acid esters obtained by reacting these unsaturated fatty acids with various alcohols and acid chlorides; and those obtained by sulfurizing a mixture of these by any method. To be

Although the sulfur content of the (A) sulfur-based extreme pressure agent in the present invention is arbitrary, it is possible to obtain an excellent effect on cutting performance and to have excellent storage stability of the lubricating oil composition. From the above, when using dihydrocarbyl polysulfide, it is desirable to use one having a sulfur content of 10 to 50% by mass, more preferably 20 to 45% by mass, and when using a sulfurized fat or oil, The sulfur content is preferably 2 to 25% by mass, more preferably 5
It is desirable to use the one of about 20% by mass.

In the lubricating oil composition of the present invention, the content of the sulfur-based extreme pressure agent as the component (A) is arbitrary, but the content is usually based on the total amount of the composition because of its excellent effect on cutting performance. The lower limit of the sulfur content derived from the component (A) is preferably 0.001% by mass, more preferably 0.1.
On the other hand, the upper limit of its content is
The sulfur content derived from the component (A) is preferably 0.5.
It is desirable that the content be contained in an amount of 0.1% by mass, and more preferably 0.1% by mass.

The component (B) in the present invention is one or more phosphorus compounds selected from phosphoric acid esters, thiophosphoric acid esters, and amine salts thereof. More specifically, examples of the phosphoric acid ester or thiophosphoric acid ester include a phosphoric acid ester or a thiophosphoric acid ester represented by the following general formula (2).

[0025]

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In the general formula (2), R ³ represents a hydrocarbon group having 2 to 30 carbon atoms, preferably 4 to 24 carbon atoms,
R ⁴ and R ⁵ are independently a hydrogen atom or a carbon number of 1 to
30 hydrocarbon groups, preferably hydrogen atoms or carbon atoms
~ 24 hydrocarbon groups, X ¹ , X ² , X ³ and X
Each of the groups ⁴ is independently an oxygen atom or a sulfur atom.

Specific examples of the hydrocarbon group for R ³ include ethyl group, n-propyl group, isopropyl group and n group.
-Butyl group, isobutyl group, sec-butyl group, ter
t-butyl group, straight-chain or branched pentyl group, straight-chain or branched hexyl group, straight-chain or branched heptyl group, straight-chain or branched octyl group, straight-chain or branched nonyl group, Straight chain or branched decyl group, straight chain or branched undecyl group, straight chain or branched dodecyl group, straight chain or branched tridecyl group, straight chain or branched tetradecyl group,
Straight-chain or branched pentadecyl group, straight-chain or branched hexadecyl group, straight-chain or branched heptadecyl group, straight-chain or branched octadecyl group, straight-chain or branched nonadecyl group, straight-chain or branched Icosyl group, straight-chain or branched henicosyl group, straight-chain or branched docosyl group, straight-chain or branched tricosyl group, straight-chain or branched tetracosyl group, straight-chain or branched pentacosyl group, direct 1 to 30 carbon atoms such as a chain or branched hexacosyl group, a straight chain or branched heptacosyl group, a straight chain or branched octacosyl group, a straight chain or branched nonacosyl group, a straight chain or branched triacontyl group An alkyl group of

A straight chain or branched butenyl group, a straight chain or branched pentenyl group, a straight chain or branched hexenyl group,
Straight-chain or branched heptenyl group, straight-chain or branched octenyl group, straight-chain or branched nonenyl group, straight-chain or branched decenyl group, straight-chain or branched undecenyl group, straight-chain or branched Dodecenyl group, straight-chain or branched tridecenyl group, straight-chain or branched tetradecenyl group, straight-chain or branched pentadecenyl group, straight-chain or branched hexadecenyl group, straight-chain or branched heptadecenyl group, direct Chain or branched octadecenyl group, straight chain or branched nonadecenyl group, straight chain or branched icosenyl group, straight chain or branched henicosenyl group, straight chain or branched docosenyl group, straight chain or branched chain Trichocenyl group, straight-chain or branched tetracosenyl group, straight-chain or branched pentacosenyl group, straight-chain or branched hexacosenyl group, straight-chain or branched heptacose group Group, an alkenyl group having 1 to 30 carbon atoms, such as straight or branched Okutakoseniru group, a linear or branched Nonakoseniru group, a linear or branched thoria Conte sulfonyl group;

Cycloalkyl groups having 5 to 7 carbon atoms such as cyclopentyl group, cyclohexyl group and cycloheptyl group; methylcyclopentyl group, dimethylcyclopentyl group (including all structural isomers), methylethylcyclopentyl group (all structural isomerism) Body), diethylcyclopentyl group (including all structural isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all structural isomers), methylethylcyclohexyl group (including all structural isomers), diethyl Cyclohexyl group (including all structural isomers), methylcycloheptyl group, dimethylcycloheptyl group (including all structural isomers), methylethylcycloheptyl group (including all structural isomers), diethylcycloheptyl group 6 carbon atoms (including all structural isomers) 11 alkylcycloalkyl group;

Aryl group such as phenyl group and naphthyl group: tolyl group (including all structural isomers), xylyl group (including all structural isomers), ethylphenyl group (including all structural isomers), Straight-chain or branched propylphenyl group (including all structural isomers), straight-chain or branched butylphenyl group (including all structural isomers), straight-chain or branched pentylphenyl group (all (Including structural isomers), linear or branched hexylphenyl group (including all structural isomers), linear or branched heptylphenyl group (including all structural isomers), linear or branched Octylphenyl group (including all structural isomers), straight-chain or branched nonylphenyl group (including all structural isomers), straight-chain or branched decylphenyl group (including all structural isomers) ), Straight chain (Including all structural isomers) undecylphenyl branched, each alkyl aryl group having 7 to 18 carbon atoms, such as linear or branched dodecylphenyl group (including all structural isomers);

Benzyl group, phenylethyl group, phenylpropyl group (including isomers of propyl group), phenylbutyl group (including isomers of butyl group), phenylpentyl group (including isomers of pentyl group), phenyl And each arylalkyl group having 7 to 12 carbon atoms such as hexyl group (including isomers of hexyl group) and the like.

Further, as R ⁴ and R ⁵ , separately,
Hydrogen atom; methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, linear or branched pentyl group, linear or branched Hexyl group, straight-chain or branched heptyl group, straight-chain or branched octyl group, straight-chain or branched nonyl group, straight-chain or branched decyl group, straight-chain or branched undecyl group, straight-chain Or a branched dodecyl group,
Straight-chain or branched tridecyl group, straight-chain or branched tetradecyl group, straight-chain or branched pentadecyl group, straight-chain or branched hexadecyl group, straight-chain or branched heptadecyl group, straight-chain or branched Octadecyl group, straight-chain or branched nonadecyl group, straight-chain or branched icosyl group, straight-chain or branched henicosyl group, straight-chain or branched docosyl group, straight-chain or branched tricosyl group, direct A chain or branched tetracosyl group, a straight chain or branched pentacosyl group, a straight chain or branched hexacosyl group, a straight chain or branched heptacosyl group, a straight chain or branched octacosyl group,
A linear or branched nonacosyl group, a linear or branched triacontyl group, or another alkyl group having 1 to 30 carbon atoms;

A straight chain or branched butenyl group, a straight chain or branched pentenyl group, a straight chain or branched hexenyl group,
Straight-chain or branched heptenyl group, straight-chain or branched octenyl group, straight-chain or branched nonenyl group, straight-chain or branched decenyl group, straight-chain or branched undecenyl group, straight-chain or branched Dodecenyl group, straight-chain or branched tridecenyl group, straight-chain or branched tetradecenyl group, straight-chain or branched pentadecenyl group, straight-chain or branched hexadecenyl group, straight-chain or branched heptadecenyl group, direct Chain or branched octadecenyl group, straight chain or branched nonadecenyl group, straight chain or branched icosenyl group, straight chain or branched henicosenyl group, straight chain or branched docosenyl group, straight chain or branched chain Trichocenyl group, straight-chain or branched tetracosenyl group, straight-chain or branched pentacosenyl group, straight-chain or branched hexacosenyl group, straight-chain or branched heptacose group Group, an alkenyl group having 1 to 30 carbon atoms, such as straight or branched Okutakoseniru group, a linear or branched Nonakoseniru group, a linear or branched thoria Conte sulfonyl group;

Cycloalkyl groups having 5 to 7 carbon atoms such as cyclopentyl group, cyclohexyl group and cycloheptyl group; methylcyclopentyl group, dimethylcyclopentyl group (including all structural isomers), methylethylcyclopentyl group (all structural isomerism) Body), diethylcyclopentyl group (including all structural isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all structural isomers), methylethylcyclohexyl group (including all structural isomers), diethyl Cyclohexyl group (including all structural isomers), methylcycloheptyl group, dimethylcycloheptyl group (including all structural isomers), methylethylcycloheptyl group (including all structural isomers), diethylcycloheptyl group 6 carbon atoms (including all structural isomers) 11 alkylcycloalkyl group;

Aryl group such as phenyl group and naphthyl group: tolyl group (including all structural isomers), xylyl group (including all structural isomers), ethylphenyl group (including all structural isomers), Straight-chain or branched propylphenyl group (including all structural isomers), straight-chain or branched butylphenyl group (including all structural isomers), straight-chain or branched pentylphenyl group (all (Including structural isomers), linear or branched hexylphenyl group (including all structural isomers), linear or branched heptylphenyl group (including all structural isomers), linear or branched Octylphenyl group (including all structural isomers), straight-chain or branched nonylphenyl group (including all structural isomers), straight-chain or branched decylphenyl group (including all structural isomers) ), Straight chain (Including all structural isomers) undecylphenyl branched, each alkyl aryl group having 7 to 18 carbon atoms, such as linear or branched dodecylphenyl group (including all structural isomers);

Benzyl group, phenylethyl group, phenylpropyl group (including isomers of propyl group), phenylbutyl group (including isomers of butyl group), phenylpentyl group (including isomers of pentyl group), phenyl And each arylalkyl group having 7 to 12 carbon atoms such as hexyl group (including isomers of hexyl group) and the like.

Specific examples of the groups of R ³ , R ⁴ and R ⁵ include the above-mentioned hydrogen atom and various hydrocarbon groups, but a lubricating oil composition having more excellent cutting performance can be obtained. Therefore, as the phosphoric acid ester or thiophosphoric acid ester as the component (B), R ³ and R ⁴ are an alkyl group or an alkenyl group having ⁴ to 24 carbon atoms, and R ⁵
Is a hydrogen atom or an alkyl group or an alkenyl group having 4 to 24 carbon atoms, R ⁶ is a hydrogen atom, and X ¹ ,
A compound in which X ² , X ³ and X ⁴ are all oxygen atoms, or at least one of X ¹ , X ² , X ³ and X ⁴ is an oxygen atom and the other is a sulfur atom is preferably used.

The amine salt of the phosphoric acid ester or thiophosphoric acid ester as the component (B) is specifically, for example, at least one of R ⁴ and R ⁵ in the general formula (2) is a hydrogen atom. Ammonia or carbon number 1 to 2 for acidic phosphoric acid ester and acidic thiophosphoric acid ester
4, preferably a salt obtained by acting a nitrogen-containing compound such as an amine compound having an alkyl group, an alkenyl group or an alkanol group having 1 to 18 carbon atoms in the molecule to neutralize a part or all of the remaining acidic hydrogen. And so on.

Specific preferred examples of the nitrogen-containing compound include, for example, ammonia; monomethylamine, monoethylamine, monopropylamine, monobutylamine, monopentylamine, monohexylamine,
Monoheptylamine, monooctylamine, monononylamine, monodecylamine, monoundecylamine, monododecylamine, monotridecylamine, monotetradecylamine, monopentadecylamine, monohexadecylamine, monoheptadecylamine, Monooctadecylamine, monononadecylamine, monoicosylamine, monohenicosylamine, monohenicosylamine, monotricosylamine, monotetracosylamine,
Dimethylamine, methylethylamine, diethylamine, methylpropylamine, ethylpropylamine, dipropylamine, methylbutylamine, ethylbutylamine, propylbutylamine, dibutylamine, dipentylamine, dihexylamine, diheptylamine, dioctylamine, dinonylamine, didecylamine, diun Decylamine, didodecylamine, ditridecylamine, ditetradecylamine, dipentadecylamine,
Alkylamines such as dihexadecylamine, diheptadecylamine, dioctadecylamine, dinonadecylamine, diicosylamine, dihenicosylamine, dihenicosylamine, ditricosylamine, ditetracosylamine May be chain-like or branched);

Monobutenylamine, monopentenylamine, monohexenylamine, monoheptenylamine, monooctenylamine, monononenylamine, monodecenylamine, monoundecenylamine, monododecenylamine, monotridecenylamine. , Monotetradecenylamine, monopentadecenylamine, monohexadecenylamine, monoheptadecenylamine, monooctadecenylamine, monononadecenylamine, monoicosenylamine, monohenicosenylamine, monohenico Cenylamine, monotricocenylamine, monotetracocenylamine, dibutenylamine, dipentenylamine, dihexenylamine, diheptenylamine, dioctenylamine, dinonenylamine, didecenylamine, diundecenylamine, di Deseniruamin, ditolyl decenyl amine, di tetradecenyl amine, di-pentadecenyl amine, di hexadecenyl amine, di-heptadecenyl amine, di octadecenylamine, Gino pat cell cycloalkenyl amines,
Alkenylamines such as diicosenylamine, dihenicosenylamine, dihenicosenylamine, ditricosenylamine, ditetracosenylamine (alkenyl groups may be linear or branched);

Monomethanolamine, monoethanolamine, monopropanolamine, monobutanolamine, monopentanolamine, monohexanolamine, monoheptanolamine, monooctanolamine, monononanolamine, monodecanolamine, monoundecanol. Amine, monododecanolamine, monotridecanolamine, monotetradecanolamine, monopentadecanolamine, monohexadecanolamine, monoheptadecanolamine, monooctadecanolamine, monononadecanolamine, mono Icosanolamine, monohenicosanolamine, monohenicosanolamine, monotricosanolamine, monotetracosanolamine, dimethanolamine, methanolethanolamine, Ethanolamine, methanol propanolamine, ethanolpropanolamine, dipropanolamine, methanol butanolamine, ethanolbutanolamine, propanolbutanolamine, dibutanolamine, dipentanolamine, dihexanolamine, diheptanolamine, dioctanolamine, dino Nanolamine, Didecanolamine, Diundecanolamine, Didodecanolamine, Ditridecanolamine, Ditetradecanolamine, Dipentadecanolamine, Dihexadecanolamine, Diheptadecanolamine, Dioctadeca Nolamine, Dinonadecanolamine, Diicosanolamine, Dihenicosanolamine, Dihenicosanolamine, Ditricosanolamine, Ditetra Alkanolamines such Sanoruamin (alkanol group linear or also branched in); and the like and mixtures thereof. Among these, as the amine compound,
An alkylamine having 6 to 24 carbon atoms is preferably used from the viewpoint that a lubricating oil composition having more excellent abrasion resistance and anticorrosion performance can be obtained.

In the lubricating oil composition of the present invention, the content of the phosphorus compound as the component (B) is arbitrary. However, (B)
If the content of the component is too small, the cutting performance is poor, while if the content is too large, the cutting performance is lowered again,
Since the solubility of the component (B) in the lubricating base oil may be deteriorated, the lower limit of the content based on the total amount of the composition is usually, as the phosphorus content derived from the component (B), preferably 0. 001% by mass, more preferably 0.002% by mass, while the upper limit of the content is preferably 0.2% by mass, more preferably 0.1% by mass as the phosphorus content derived from the component (B). It is desirable to contain it so as to be in a mass%.

In the present invention, the component (C) is (C)
-1) An ester of a fatty acid having 6 to 30 carbon atoms and a monohydric alcohol, and (C-2) one or more oxygen-containing compounds selected from the aliphatic alcohols having 6 to 30 carbon atoms. It is a compound.

The fatty acid referred to as the component (C-1) may be a linear fatty acid or a branched fatty acid, and may be a saturated fatty acid or an unsaturated fatty acid, but the lower limit of the number of carbon atoms is 6, preferably 8, , The upper limit of carbon number is 30, preferably 2
4. When the fatty acid has less than 6 carbon atoms, the friction reducing effect of the resulting lubricating oil composition is insufficient, while when the fatty acid has more than 30 carbon atoms, there is a problem in solubility in the lubricating base oil. They are not preferable because they may occur.

Specific examples of the fatty acid as the component (C-1) include linear or branched hexanoic acid, linear or branched heptanoic acid, linear or branched octanoic acid, linear or Branched nonanoic acid, linear or branched decanoic acid, linear or branched undecanoic acid, linear or branched dodecanoic acid, linear or branched tridecanoic acid, linear or branched tetradecanoic acid , Linear or branched pentadecanoic acid,
Straight-chain or branched hexadecanoic acid, straight-chain or branched heptadecanoic acid, straight-chain or branched octadecanoic acid, straight-chain or branched nonadecanoic acid, straight-chain or branched icosanoic acid, straight-chain or branched Henicosanoic acid, straight-chain or branched docosanoic acid, straight-chain or branched tricosanoic acid, straight-chain or branched tetracosanoic acid, straight-chain or branched pentacosanoic acid, straight-chain or branched hexacosanoic acid, direct Saturated fatty acids such as chain or branched heptacosanoic acid, straight chain or branched octacosanoic acid, straight chain or branched nonacosanoic acid, straight chain or branched triacontanoic acid;

Straight-chain or branched hexenoic acid, straight-chain or branched heptenoic acid, straight-chain or branched octenoic acid, straight-chain or branched nonenic acid, straight-chain or branched decenoic acid, straight-chain Or branched undecenoic acid, linear or branched dodecenoic acid, linear or branched tridecenoic acid, linear or branched tetradecenoic acid, linear or branched pentadecenoic acid,
Straight-chain or branched hexadecenoic acid, straight-chain or branched heptadecenoic acid, straight-chain or branched octadecenoic acid, straight-chain or branched nonadecenoic acid, straight-chain or branched icosenoic acid, straight-chain or branched Henicosenoic acid, straight-chain or branched docosenoic acid, straight-chain or branched tricosenoic acid, straight-chain or branched tetracosenoic acid, straight-chain or branched pentacosenoic acid, straight-chain or branched hexacosenoic acid, direct Unsaturated fatty acids such as chain or branched heptacosenoic acid, straight chain or branched octacosenoic acid, straight chain or branched nonacosenoic acid, straight chain or branched triacontenoic acid; and the like.

Among these, as the fatty acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid are particularly preferable because a lubricating oil composition having an excellent friction reducing effect can be obtained. , Linear fatty acids derived from various fats and oils (coconut oil fatty acids, etc.)
C6-24 straight chain fatty acids, or mixtures thereof are preferably used.

The 1- to 6-hydric alcohol as the component (C-1) specifically includes, for example, 1 to 18 carbon atoms,
Preferably an aliphatic alcohol (monohydric alcohol) having 1 to 12 carbon atoms or 2 to 12 carbon atoms, preferably 2 to 2 carbon atoms
Examples of the divalent to hexavalent polyhydric alcohol of 9 are mentioned.

The aliphatic alcohol having 1 to 18 carbon atoms may be a straight chain alcohol or a branched alcohol, and may be a saturated alcohol or an unsaturated alcohol. More specifically, for example, methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, sec
-Butyl alcohol, tert-butyl alcohol, straight-chain or branched pentyl alcohol, straight-chain or branched hexyl alcohol, straight-chain or branched heptyl alcohol,
Straight-chain or branched octyl alcohol, straight-chain or branched nonyl alcohol, straight-chain or branched decyl alcohol, straight-chain or branched undecyl alcohol, straight-chain or branched dodecyl alcohol, straight-chain or branched tridecyl alcohol Saturated aliphatic alcohols such as linear or branched tetradecyl alcohol, linear or branched pentadecyl alcohol, linear or branched hexadecyl alcohol, linear or branched heptadecyl alcohol, linear or branched octadecyl alcohol ;

Straight-chain or branched butenyl alcohol (including all isomers), straight-chain or branched pentenyl alcohol (including all isomers), straight-chain or branched hexenyl alcohol (including all isomers) ), Straight chain or branched heptenyl alcohol (including all isomers),
Straight-chain or branched octenyl alcohol (includes all isomers), straight-chain or branched nonenyl alcohol (includes all isomers), straight-chain or branched decenyl alcohol (includes all isomers) ), Straight-chain or branched undecenyl alcohol (including all isomers), straight-chain or branched dodecenyl alcohol (including all isomers), straight-chain or branched tridecenyl alcohol (all ), Straight-chain or branched tetradecenyl alcohol (including all isomers), straight-chain or branched pentadecenyl alcohol (including all isomers), straight-chain or branched Hexadecenyl alcohol (including all isomers), linear or branched heptadecenyl alcohol (including all isomers), linear or branched octadecenyl alcohol (all variants) Unsaturated aliphatic alcohols such as including the body);

Among these, a straight chain saturated aliphatic alcohol having 1 to 8 carbon atoms is more preferable from the viewpoint that a lubricating oil composition having an excellent friction reducing effect can be obtained. .

Further, as the C2-12 dihydric alcohol, more specifically, for example, ethylene glycol, propylene glycol, trimethylene glycol,
Butylene glycol, 1,1-dimethylethylene glycol, 1,2-dimethylethylene glycol, 1-methyltrimethylene glycol, 2-methyltrimethylene glycol, tetramethylene glycol, pentylene glycol, hexylene glycol, 2,2-dimethyl Glycols such as trimethylene glycol; glycerin; trimethylolalkanes such as trimethylolethane, trimethylolpropane and trimethylolbutane; pentaerythritol; 1,3,5-pentanetriol; sorbitol; sorbitan; and mixtures thereof. However, among them, glycols, glycerin, trimethylolalkanes, pentaerythritol, and mixtures thereof are particularly preferable because a lubricating oil composition having an excellent friction reducing effect can be obtained. Things like are preferable.

When a polyhydric alcohol having a valence of 2 to 6 is used as the alcohol component of the fatty acid ester which is the component (C-1) in the present invention, all the polyhydric alcohols can be used as the component (C-1). It may be a so-called complete ester in which the hydroxyl groups are esterified, or a so-called partial ester in which one or more hydroxyl groups of the polyhydric alcohol remain without being esterified.

On the other hand, the aliphatic alcohol referred to as the component (C-2) may be a straight chain alcohol or a branched alcohol, and may be a saturated alcohol or an unsaturated alcohol, but the lower limit of the carbon number thereof is 6, preferably 8 On the other hand, the upper limit of the number of carbon atoms is 30, preferably 24. When the aliphatic alcohol has less than 6 carbon atoms, the friction reducing effect of the resulting lubricating oil composition is insufficient. On the other hand, when the aliphatic alcohol has more than 30 carbon atoms, the lubricating oil base oil has They are not preferable because they may cause problems in solubility.

Specific examples of the aliphatic alcohol as the component (C-2) include straight chain or branched hexyl alcohol, straight chain or branched heptyl alcohol, straight chain or branched octyl alcohol, straight chain or branched chain. Branched nonyl alcohol, straight chain or branched decyl alcohol, straight chain or branched undecyl alcohol, straight chain or branched dodecyl alcohol, straight chain or branched tridecyl alcohol, straight chain or branched tetradecyl alcohol, straight chain Or branched pentadecyl alcohol, linear or branched hexadecyl alcohol, linear or branched heptadecyl alcohol, linear or branched octadecyl alcohol, linear or branched nonadecyl alcohol, linear or branched icosyl alcohol , Straight-chain or branched henicosyl alcohol, straight-chain or branched docosylal Lumpur, straight or branched Trichoderma sills alcohols, straight or branched tetracosyl alcohol,
Straight-chain or branched pentacosyl alcohol, straight-chain or branched hexacosyl alcohol, straight-chain or branched heptacosyl alcohol, straight-chain or branched octacosyl alcohol, straight-chain or branched nonacosyl alcohol, direct Alkyl alcohols such as chain or branched triacontyl alcohols;

Straight-chain or branched hexenyl alcohol (including all isomers), straight-chain or branched heptenyl alcohol (including all isomers), straight-chain or branched octenyl alcohol (all isomers) Including), straight-chain or branched nonenyl alcohols (including all isomers),
Linear or branched decenyl alcohol (including all isomers), linear or branched undecenyl alcohol (including all isomers), linear or branched dodecenyl alcohol (all isomers) Body), straight-chain or branched tridecenyl alcohol (includes all isomers), straight-chain or branched tetradecenyl alcohol (includes all isomers), straight-chain or branched pentadece Nyl alcohol (including all isomers), linear or branched hexadecenyl alcohol (including all isomers), linear or branched heptadecenyl alcohol (including all isomers), direct Chain or branched octadecenyl alcohol (including all isomers), straight chain or branched nonadecenyl alcohol,
Straight chain or branched icosenyl alcohol, straight chain or branched henicosenyl alcohol, straight chain or branched docosenyl alcohol, straight chain or branched tricosenyl alcohol,
Linear or branched tetracocenyl alcohol, linear or branched pentacocenyl alcohol, linear or branched hexacocenyl alcohol, linear or branched heptacocenyl alcohol, linear or branched octacocenyl alcohol,
Examples thereof include alkenyl alcohols such as straight chain or branched nonacocenyl alcohol, straight chain or branched triacontenyl alcohol; or mixtures thereof. Among these, a lubricating oil composition having an excellent friction reducing effect can be obtained. From this viewpoint, a straight chain saturated aliphatic alcohol having 8 to 24 carbon atoms is more preferable.

In the lubricating oil composition of the present invention, the content of the oxygen-containing compound as the component (C) is arbitrary, but from the viewpoint that a lubricating oil composition having an excellent friction reducing effect can be obtained, the total amount of the composition is usually a standard. Therefore, the lower limit of the content is preferably 0.1
The content is preferably 0.5% by mass, and more preferably 0.5% by mass, while the upper limit of the content is preferably 30% by mass, more preferably 10% by mass.

The component (D) referred to in the present invention is an organic boron compound. The boron content of the organoboron compound is arbitrary, but if the amount is too small, the wear resistance of the obtained lubricating oil composition is poor, while if it is too large, the storage stability of the obtained lubricating oil composition deteriorates. Usually, the boron content is preferably 0.05 to 10% by mass, more preferably 0.2 to 8% by mass.

Specific examples of the (D) organoboron compound include (D-1) a boric acid-modified product of a nitrogen-containing compound such as succinimide, benzylamine and polyamine.
(D-2) a boric acid modified product such as a higher alcohol ester compound, (D-3) boric acid ester, and (D-4) an oil-soluble metal salt containing an alkali (earth) metal borate,
One or more organic boron compounds selected from the above are listed. More specifically, examples of the succinimide as the component (D-1) include compounds represented by the following general formula (3) or general formula (4).

[0060]

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[0061]

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In the above general formulas (3) and (4), R ⁶ , R ⁷ and R ⁸ are independently number average molecular weight 3
Represents an alkenyl group derived from a polyolefin of 0 to 3000, and a is a number of 1 to 5, preferably 2 to 4,
b represents a number of 0 to 4, preferably 1 to 3, respectively.

The method for producing this succinimide is not limited in any way. For example, a polyolefin having a number average molecular weight of 300 to 3000 such as propylene oligomer, polybutene, ethylene-propylene copolymer is reacted with maleic anhydride. After obtaining the alkenyl succinic anhydride,
Examples thereof include those imidized with polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine.

In the imidization of succinimide, succinic anhydride was added to one end of polyamine.
The so-called monotype succinimide as represented by the general formula (3) and succinic anhydride added to both ends of the polyamine,
There is a so-called bis type succinimide as represented by the general formula (4), and as the succinimide as the component (D-1), any of them or a mixture thereof can be used.

Further, as the benzylamine as the component (D-1), more specifically, for example, compounds represented by the following general formula (5) can be mentioned.

[0066]

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In the above general formula (5), R ⁹ represents an alkyl group derived from a polyolefin having a number average molecular weight of 300 to 3000, and c represents a number of 1 to 5, preferably 2 to 4, respectively. There is.

The method for producing this benzylamine is not limited in any way. For example, a polyolefin having a number average molecular weight of 300 to 3,000 such as propylene oligomer, polybutene, ethylene-propylene copolymer and the like is reacted with phenol to obtain an alkylphenol. Then, it can be obtained by reacting formaldehyde with polyamines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine by the Mannich reaction.

Further, as the polyamine as the component (D-1), more specifically, for example, a compound represented by the following general formula (6) can be mentioned.

[0070]

[Chemical 6]

In the above general formula (6), R ¹⁰ represents an alkyl group derived from a polyolefin having a number average molecular weight of 300 to 3000, and d represents a number of 1 to 5, preferably 2 to 4, respectively. There is.

The method for producing the polyamine is not limited at all, but for example, after chlorinating a polyolefin having a number average molecular weight of 300 to 3000 such as propylene oligomer, polybutene, ethylene-propylene copolymer,
It can be obtained by reacting this with a polyamine such as ammonia or ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine.

As the component (D-1) of the present invention, those obtained by reacting (boric acid-modifying) a compound such as boric acid, borate, or borate ester with these nitrogen-containing compounds can be used. As boric acid used for boric acid modification,
Specific examples include orthoboric acid, metaboric acid and tetraboric acid.

The borate used in the modification with boric acid is, for example, an alkali metal salt of boric acid,
Examples thereof include alkaline earth metal salts and ammonium salts, and more specifically, lithium borate such as lithium metaborate, lithium tetraborate, lithium pentaborate, and lithium perborate; sodium metaborate, diborate. Sodium borate such as sodium phosphate, sodium tetraborate, sodium pentaborate, sodium hexaborate, sodium octaborate; potassium metaborate, potassium tetraborate, potassium pentaborate, potassium hexaborate, octaborate Potassium borate such as potassium; calcium metaborate,
Calcium borate such as calcium diborate, tricalcium tetraborate, pentacalcium tetraborate and calcium hexaborate; magnesium metaborate, magnesium diborate, trimagnesium tetraborate, pentamagnesium tetraborate, hexaborate Magnesium borate, such as magnesium acidate;
Further, ammonium borate such as ammonium metaborate, ammonium tetraborate, ammonium pentaborate and ammonium octaborate are preferably used.

Examples of the boric acid ester used in the modification with boric acid include esters of boric acid and preferably an alkyl alcohol having 1 to 6 carbon atoms, and more specifically, for example, monomethyl borate and borate. Dimethyl acid, trimethyl borate, monoethyl borate, diethyl borate, triethyl borate, monopropyl borate, dipropyl borate, tripropyl borate, monobutyl borate, dibutyl borate, tributyl borate and the like are preferably used.

The nitrogen content of the component (D-1) is optional, but normally the nitrogen content is preferably 0.5.
It is desirable to use those having a content of -15% by mass, more preferably 1.0-10% by mass.

On the other hand, the component (D-2) is a boric acid modified product such as a higher alcohol ester compound. Specific examples of the higher alcohol ester compound herein include, for example, a higher aliphatic alcohol having 6 to 24 carbon atoms, preferably 8 to 20 carbon atoms, and a higher aliphatic alcohol having 6 to 24 carbon atoms, preferably 8 to 20 carbon atoms. Examples thereof include esters with fatty acids.

Specific examples of the higher aliphatic alcohol having 6 to 24 carbon atoms include straight chain or branched hexyl alcohol, straight chain or branched heptyl alcohol, straight chain or branched octyl alcohol, and straight chain. Chain or branched nonyl alcohol, straight chain or branched decyl alcohol, straight chain or branched undecyl alcohol, straight chain or branched dodecyl alcohol, straight chain or branched tridecyl alcohol, straight chain or branched tetradecyl alcohol , Straight-chain or branched pentadecyl alcohol, straight-chain or branched hexadecyl alcohol, straight-chain or branched heptadecyl alcohol, straight-chain or branched octadecyl alcohol, straight-chain or branched nonadecyl alcohol, straight-chain or branched Icosyl alcohol, straight chain or branched hen icosyl alcohol, straight chain or branched Docosyl alcohol, linear or branched Trichoderma sills alcohols, saturated aliphatic alcohols such as linear or branched tetracosyl alcohol;

Straight-chain or branched hexenyl alcohol (including all isomers), straight-chain or branched heptenyl alcohol (including all isomers), straight-chain or branched octenyl alcohol (all isomers) Including), straight-chain or branched nonenyl alcohols (including all isomers),
Linear or branched decenyl alcohol (including all isomers), linear or branched undecenyl alcohol (including all isomers), linear or branched dodecenyl alcohol (all isomers) Body), straight-chain or branched tridecenyl alcohol (includes all isomers), straight-chain or branched tetradecenyl alcohol (includes all isomers), straight-chain or branched pentadece Nyl alcohol (including all isomers), linear or branched hexadecenyl alcohol (including all isomers), linear or branched heptadecenyl alcohol (including all isomers), direct Chain or branched octadecenyl alcohol (including all isomers), straight chain or branched nonadecenyl alcohol,
Straight chain or branched icosenyl alcohol, straight chain or branched henicosenyl alcohol, straight chain or branched docosenyl alcohol, straight chain or branched tricosenyl alcohol,
Unsaturated fatty alcohols such as straight chain or branched tetracocenyl alcohols; or mixtures thereof.

On the other hand, examples of the higher fatty acid having 6 to 24 carbon atoms include, for example, linear or branched hexanoic acid,
Straight-chain or branched heptanoic acid, straight-chain or branched octanoic acid, straight-chain or branched nonanoic acid, straight-chain or branched decanoic acid, straight-chain or branched undecanoic acid, straight-chain or branched Dodecanoic acid, straight-chain or branched tridecanoic acid, straight-chain or branched tetradecanoic acid, straight-chain or branched pentadecanoic acid, straight-chain or branched hexadecanoic acid, straight-chain or branched heptadecanoic acid, direct Chain or branched octadecanoic acid, straight chain or branched nonadecanoic acid, straight chain or branched icosanoic acid, straight chain or branched henicosanoic acid, straight chain or branched docosanoic acid, straight chain or branched chain Saturated fatty acids such as tricosanoic acid, straight chain or branched tetracosanoic acid;

Straight-chain or branched hexenoic acid, straight-chain or branched heptenoic acid, straight-chain or branched octenoic acid, straight-chain or branched nonenic acid, straight-chain or branched decenoic acid, straight-chain Or branched undecenoic acid, linear or branched dodecenoic acid, linear or branched tridecenoic acid, linear or branched tetradecenoic acid, linear or branched pentadecenoic acid,
Straight-chain or branched hexadecenoic acid, straight-chain or branched heptadecenoic acid, straight-chain or branched octadecenoic acid, straight-chain or branched nonadecenoic acid, straight-chain or branched icosenoic acid, straight-chain or branched Unsaturated fatty acids such as henicosenoic acid, linear or branched docosenoic acid, linear or branched tricosenoic acid, linear or branched tetracosenoic acid, and the like;

As the component (D-2) of the present invention, those obtained by reacting (boric acid-modified) a compound such as boric acid, borate, or borate ester with a higher fatty acid ester of these higher alcohols Can be used. In addition, as boric acid, borate, and borate ester used in the case of boric acid modification,
Various boron compounds as listed in the component (D-1) can be used.

On the other hand, the component (D-3) is a boric acid ester. Specific examples of the borate ester here include, for example, 6 to 24 carbon atoms, and preferably 8 to 20 carbon atoms.
Borate of higher aliphatic alcohol, or borate of higher polyhydric alcohol having 6 to 24 carbon atoms, preferably 8 to 20 carbon atoms can be used.

More specifically, for example, straight chain or branched hexyl alcohol, straight chain or branched heptyl alcohol, straight chain or branched octyl alcohol, straight chain or branched nonyl alcohol, straight chain or branched decyl alcohol, Straight chain or branched undecyl alcohol, straight chain or branched dodecyl alcohol, straight chain or branched tridecyl alcohol, straight chain or branched tetradecyl alcohol, straight chain or branched pentadecyl alcohol, straight chain or branched Hexadecyl alcohol, straight-chain or branched heptadecyl alcohol, straight-chain or branched octadecyl alcohol, straight-chain or branched nonadecyl alcohol, straight-chain or branched icosyl alcohol, straight-chain or branched henicosyl alcohol, straight Chain or branched docosyl alcohol, straight chain or branched tricosyl alcohol Le, boric acid mono-esters of saturated aliphatic alcohols such as linear or branched tetracosyl alcohol, boric acid diesters or borate triester;

Straight-chain or branched hexenyl alcohol (including all isomers), straight-chain or branched heptenyl alcohol (including all isomers), straight-chain or branched octenyl alcohol (all isomers) Including), straight-chain or branched nonenyl alcohols (including all isomers),
Linear or branched decenyl alcohol (including all isomers), linear or branched undecenyl alcohol (including all isomers), linear or branched dodecenyl alcohol (all isomers) Body), straight-chain or branched tridecenyl alcohol (includes all isomers), straight-chain or branched tetradecenyl alcohol (includes all isomers), straight-chain or branched pentadece Nyl alcohol (including all isomers), linear or branched hexadecenyl alcohol (including all isomers), linear or branched heptadecenyl alcohol (including all isomers), direct Chain or branched octadecenyl alcohol (including all isomers), straight chain or branched nonadecenyl alcohol,
Straight chain or branched icosenyl alcohol, straight chain or branched henicosenyl alcohol, straight chain or branched docosenyl alcohol, straight chain or branched tricosenyl alcohol,
Linear or branched tetracocenyl alcohol, linear or branched pentacocenyl alcohol, linear or branched hexacocenyl alcohol, linear or branched heptacocenyl alcohol, linear or branched octacocenyl alcohol,
Boric acid monoesters, boric acid diesters or boric acid triesters of unsaturated aliphatic alcohols such as linear or branched nonacocenyl alcohols, linear or branched triacontenyl alcohols;

Straight-chain or branched hexanediol, straight-chain or branched heptanediol, straight-chain or branched octanediol, straight-chain or branched nonanediol, straight-chain or branched decanediol, straight-chain or branched undecanediol , Linear or branched dodecanediol, linear or branched tridecanediol, linear or branched tetradecanediol, linear or branched pentadecanediol, linear or branched hexadecanediol, linear or branched heptadecanediol , Linear or branched octadecanediol,
Straight chain or branched nonadecane diol, straight chain or branched icosane diol, straight chain or branched henicosane diol, straight chain or branched docosane diol, straight chain or branched tricosane diol, straight chain or branched Branched tetracosanediol, straight-chain or branched hexanetriol, straight-chain or branched heptanetriol, straight-chain or branched octanetriol, straight-chain or branched nonanetriol, straight-chain or branched decantriol, straight-chain or branched Undecanetriol, linear or branched dodecanetriol, linear or branched tridecanetriol, linear or branched tetradecanetriol, linear or branched pentadecanetriol, linear or branched hexadecanetriol, linear or branched hepta Decanetriol, linear or branched octadecanetriol, Chain or branched nonadecane triol, linear or branched icosantriol, linear or branched henicosantriol, linear or branched docosantriol, linear or branched tricosantriol, linear or branched Boric acid monoesters, boric acid diesters, boric acid triesters of higher polyhydric alcohols such as tetracosantriol; and mixtures thereof.

On the other hand, the component (D-4) is an oil-soluble metal salt containing an alkali (earth) metal borate. As the oil-soluble metal salt containing an alkali (earth) metal borate, specifically, for example, alkali (earth)
Metal borate containing overbased alkali (earth) metal sulfonate, alkali (earth) metal borate containing overbased alkali (earth) metal phenate, alkali (earth) metal borate containing Examples include overbased alkali (earth) metal salicylates or mixtures thereof.

The method for producing these oil-soluble metal salts is arbitrary. For example, neutral (normal salt) alkali (earth) metal sulfonates, alkali (earth) metal phenates, and alkali (earth) metal salicylates can be used. It can be obtained by reacting with boric acid, borate or borate ester in the presence of an alkali (earth) metal base. As another method, for example, neutral (normal salt) alkali (earth) metal sulfonate, alkali (earth) metal phenate, alkali (earth) metal salicylate in the presence of an alkali (earth) metal base. Alkali (earth) by reacting with carbon dioxide at
After forming an overbased salt containing a metal carbonate, boric acid,
It can be obtained by reacting borate or borate ester.

The alkali metal referred to here is
Specific examples thereof include lithium, sodium, potassium, and the like, while specific examples of the alkaline earth metal include magnesium, calcium, barium, and the like. Examples of alkali (earth) metal bases include hydroxides and oxides of these alkali (earth) metals. Further, as the boric acid, borate or borate, various boric acids, borate or borate used in the boric acid modification of the component (D-1) can be used.

On the other hand, the neutral (normal salt) alkali (earth) metal sulfonate has, for example, a molecular weight of 100 to 1
An alkali (earth) metal neutral salt of an alkylaromatic sulfonic acid obtained by sulfonating an alkylaromatic compound of 500, preferably 200 to 700 is used. Specific examples of the alkylaromatic sulfonic acid include: Examples include so-called petroleum sulfonic acid and synthetic sulfonic acid.

As the petroleum sulfonic acid, generally used is one obtained by sulfonating an alkyl aromatic compound of a lubricating oil fraction of mineral oil, so-called mahogany acid produced as a by-product during the production of white oil, and the like. Further, as the synthetic sulfonic acid, for example, by-produced from an alkylbenzene production plant which is a raw material of a detergent or obtained by alkylating a polyolefin into benzene, an alkylbenzene having a linear or branched alkyl group is used as a raw material. A sulfonation product of this, or a sulfonation product of an alkylnaphthalene such as dinonylnaphthalene is used. The sulfonating agent used for sulfonating these alkyl aromatic compounds is not particularly limited, and fuming sulfuric acid or sulfuric anhydride is usually used.

As the neutral (normal salt) alkali (earth) metal phenate, for example, at least one linear or branched alkyl group having 4 to 30 carbon atoms, preferably 6 to 18 carbon atoms is used. Alkylphenols that are present, alkylphenol sulfides obtained by reacting this alkylphenol with elemental sulfur, or alkaline (earth) metal neutral salts of the Mannich reaction products of alkylphenols obtained by reacting this alkylphenol with formaldehyde are used.

As the neutral (normal salt) alkali (earth) metal salicylate, for example, at least one linear or branched alkyl group having 4 to 30 carbon atoms, preferably 6 to 18 carbon atoms is used. The alkali (earth) metal neutral salt of alkyl salicylic acid is used. In addition, these reactions are usually carried out with a solvent (aliphatic hydrocarbon solvent such as hexane, aromatic hydrocarbon solvent such as xylene, light lubricating base oil, etc.)
Done in. The component (D-4) is usually commercially available in a state of being diluted with a light lubricating base oil or the like, and is available, but generally, the metal content thereof is 3 to 30 mass%, It is preferable to use the one of 5 to 25 mass%.

The total base number of the component (D-4) is arbitrary, but the total base number is preferably 50 to 450 mgKOH / g from the viewpoint of obtaining a compound having a high boron content.
More preferably, it is 80 to 400 mgKOH / g. The total base number referred to here is JIS K 2501.
7. "Petroleum products and lubricants-Neutralization number test method" Means the total base number measured by the perchloric acid method in accordance with.

As the component (D) of the present invention, for example, one kind or two or more kinds of compounds selected from the above-mentioned components (D-1) to (D-4) can be used. From the point of obtaining a lubricating oil composition having more excellent wear resistance,
It is preferable to use the component (D-1), and it is particularly preferable to use the boron-modified succinimide.

In the lubricating oil composition of the present invention, the content of the organic boron compound as the component (D) is arbitrary. But,
When the content of the component (D) is too small, the wear resistance is poor, and when the content is too large, the storage stability of the resulting lubricating oil composition may be deteriorated. The lower limit of the content is, as the boron content derived from the component (D), preferably 0.0001% by mass, more preferably 0.0005% by mass, while the upper limit of the content thereof is ( The boron derived from the component D) is preferably contained in an amount of 2.0% by mass, more preferably 1.0% by mass.

Further, in the lubricating oil composition of the present invention, for the purpose of further enhancing various performances thereof, known lubricating oil additives such as antioxidants, detergent dispersants, oiliness agents, corrosion inhibitors, and viscosity indexes are further added. Improvers, pour point depressants, defoamers and the like can be used alone or in combination of several kinds.

As the antioxidant, any of those generally used in lubricating oils such as phenol compounds and amine compounds can be used. Specifically, for example,
Alkylphenols such as 2,6-di-tert-butyl-4-methylphenol, bisphenols such as methylene-4,4-bis (2,6-di-tert-butyl-4-methylphenol), phenyl-α -Naphthylamines such as naphthylamine, dialkyldiphenylamines, zinc dialkyldithiophosphates such as zinc di-2-ethylhexyldithiophosphate, and the like.

Specific examples of the detergent dispersant include:
Neutral, basic or overbased alkaline earth metal sulfonates, alkaline earth metal phenates, metal detergents such as alkaline earth metal salicylates, alkenyl succinimides, benzylamines, polyamines or their boron compounds, organic Examples thereof include ashless dispersants such as modified products with acids and sulfur compounds.

As the oiliness agent, fatty acid, fatty acid ester, fatty acid amide, fatty acid metal salt, fatty acid amine salt, aliphatic alcohol, aliphatic amine or alkylene oxide adduct thereof, organic (sub) phosphoric acid ester, organic (sub)
Examples thereof include phosphate amine salts.

Specific examples of the corrosion inhibitor include:
Examples thereof include benzotriazole-based, thiadiazole-based, and imidazole-based compounds.

Specific examples of the viscosity index improver include polymethacrylates, non-dispersion type viscosity index improvers such as olefin copolymers such as ethylene-propylene copolymer and styrene-diene copolymer, and Examples thereof include a dispersion type viscosity index improver obtained by copolymerizing a nitrogen-containing monomer.

Specific examples of the pour point depressant include polymethacrylate type polymers compatible with the lubricating base oil used.

Specific examples of the defoaming agent include silicones such as dimethyl silicone and fluorosilicone.

The amount of these known additives added is arbitrary, but when they are used, their content is usually 0.01 to 5% by mass based on the total amount of the lubricating oil composition; In the agent, usually 0.01 to 5% by mass; in the oily agent,
Usually 0.1 to 10% by mass; with corrosion inhibitors, usually
0.001 to 0.5 mass%; for viscosity index improvers, usually 0.01 to 20 mass%; for pour point depressants, usually
0.01-5% by mass; with antifoaming agents, usually 0.001-
0.5% by mass; it is desirable to mix them.

The lubricating oil composition of the present invention is particularly preferably used as a hydraulic oil / sliding surface oil cutting oil as described above. However, it is naturally possible to use it alone as cutting oil, hydraulic oil, sliding surface oil, and further, for other applications, for example, rolling oil, ironing oil,
Even if it is used as a metal working oil such as a press oil (drawing oil, drawing oil, punching oil), it is practically usable.

[0107]

EXAMPLES Hereinafter, the contents 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 contents.

(Examples 1 to 4) According to the composition shown in Table 1,
A lubricating oil composition according to the present invention was prepared (Examples 1 to 1
4). Various performance evaluation tests shown below were performed on this composition, and the results are also shown in Table 1. The components shown in Table 1 are as follows. Base oil Solvent-refined mineral oil, kinematic viscosity 32 mm ² / s (@ 40 ° C.) (A) component A: di-t-nonylpolysulfide (t-nonyl group is derived from a propylene trimer, in one molecule Average number of sulfur atoms = 4.6, sulfur content = 38% by mass) B: lard sulfide (sulfur content = 10% by mass) (B) component C: decylamine salt of dihexyldithiophosphate (phosphorus content = 7% by mass) , Sulfur content 14% by mass)) D: dioctyl phosphate (phosphorus content = 9.5% by mass) (C) component E: butyl stearate F: glycerin monooleate (D) component G: boric acid modified polybu Tenyl succinimide (number average molecular weight of polybutenyl group = 600, boron content = 2 mass%) H: calcium borate overbased calcium salicylate (total base number (HCl04 method) = 190 mg) (KOH / g, calcium content = 6 mass%, boron content = 5 mass%)

(Comparative Examples 1 to 7) For comparison, (A)
When no component is used (Comparative Example 1), when (B) component is not used (Comparative Example 2), when (C) component is not used (Comparative Example 3), when (D) component is not used (Comparative Example) 4), when using a commercially available high chlorine-based cutting oil (Comparative Example 5), when using a commercially available hydraulic fluid (Comparative Example 6), and when using a commercially available sliding surface oil (Comparative Example 7). ), The same performance evaluation test was performed, and the results are also shown in Table 1.

[Hog cutting test with a hobbing machine] In order to evaluate the machining performance of the sample oil as a cutting oil, a gear called a hob is used to carry out gear cutting under the following conditions. The amount of wear of the hob edge was measured. Machining conditions Hobbing machine Mitsubishi Heavy Industries NC hobbing machine GC10CNC Cutting method Crime method (without hob shift) Cutting speed 150 m / min Cutting feed 2.0 mm / rev (axial direction) Cutting quantity 50 Gear specifications module 1.5 Diameter 100 mm Tooth width 30 mm Twist angle 22.0 ° (LH) Material JIS SCM415 (HB200) Hob specifications Outer diameter 55 mm Number of threads 3 Number of cutting edge grooves 12 Lead angle 5.07 ° (LH)

[Pump Test] In order to evaluate the wear prevention performance of the sample oil as a hydraulic fluid, ASTM D2882 is used.
According to the above, a pump test was performed under the following conditions, and the amount of wear of the vane and the ring after the test was measured. Test conditions Pump Vickers V-104C Pressure 140 kgf / cm ² Temperature 65 ° C. Rotation speed 1200 rpm Test time 100 hours

[Bowden Test] In order to evaluate the lubrication performance of the sample oil as a sliding surface oil, a Bowden test was conducted under the following conditions, and the steel ball test piece was pressed against the flat plate test piece with a constant load and a predetermined sliding speed was applied. The frictional force when moved by was measured to determine the frictional coefficient (= frictional force / load). Test conditions Steel ball test piece JIS SUJ2 (diameter 12.7m
m) Flat plate test piece JIS S30C load 1 kgf sliding speed 30 mm / min

[0113]

[Table 1]

As is clear from the results of Table 1, the lubricating oil composition according to the present invention satisfies all the required performances as cutting oil, hydraulic fluid and sliding surface oil, and has excellent performance as a dual-purpose oil. Is to have. On the other hand, when the essential components of the present invention are lacking (Comparative Examples 1 to 4) and the commercially available dedicated oils (Comparative Examples 5 to 7), the required performances as cutting oil, hydraulic fluid and sliding surface oil are all It is inferior to any of the above, and there is a problem in using it as a dual-purpose oil.

[0115]

INDUSTRIAL APPLICABILITY The lubricating oil composition of the present invention does not contain chlorine compounds at all in view of environment and safety, and is not only used as cutting oil but also machine tools such as hydraulic oil and sliding surface oil. A lubricating oil composition that can also be used as a lubricating oil.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication C10M 137: 04 137: 10 137: 08 129: 68 139: 00) C10N 40:02 40:06 40 : 08 40:22 (72) Inventor Eiji Tominaga 8 Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa Nippon Petroleum Co., Ltd. Central Technology Research Institute

Claims (1)

[Claims] 1. A lubricant base oil, and (A) a sulfur-based extreme pressure agent, (B) a phosphoric acid ester, a thiophosphoric acid ester, and one or more kinds of phosphorus selected from these amine salts. Compound, (C) fatty acid having 6 to 30 carbon atoms and 1 to
Esters with hexahydric alcohols and C6-30
A lubricating oil composition comprising one or more oxygen-containing compounds selected from the aliphatic alcohols mentioned above, and (D) an organoboron compound.