JPH08143890A - Lubricant composition for rolling - Google Patents

Abstract

PURPOSE: To obtain a lubricant composition containing water, a specific oxygen- containing compound, a fatty acid salt, having firepreventing property, cooling property, rolling property and gloss property on metal surface after rolling, excellent in storage stability, not producing oil stain and capable of filtering and removing abrasive powder in rolling. CONSTITUTION: This composition contains (A) 5-89.95wt.% of water, (B) 10-94.95wt.% of an oxygen-containing compound of the formula R<1> O-(R<3> -O)p -R<2> [R<1> and R<2> are H or a 1-18C hydrocarbon group; R<3> is a 1-6C alkylene; (p) is 1-30] and (C) 0.05-10wt.% of at least one kind of a fatty acid salt selected from a group of a 6-22C fatty acid alkali metal salt, a salt of a 6-22C fatty acid and a 1-15C alkanolamine and a salt of a 6-22C fatty acid and a compound of the formula R<4> is a 1-24C hydrocarbon group; R<5> is ethylene group or propylene group; X is H, R<4> or a group of the formula (R<6> -O)rH [R<6> is R<5> ; (r) is 1-30]; (q) is (r)} and has 80-99.95wt.% of total content of the components A and B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricant composition for rolling, more specifically, stainless steel,
The present invention relates to a lubricant composition for rolling, which is particularly suitable as a lubricant for rolling metal materials such as copper, aluminum and alloys thereof, which are required to have good surface gloss.

[0002]

2. Description of the Related Art Hot rolling and cold rolling are known as techniques for rolling a metal material into a thin metal plate by rolling it with a rolling mill. When performing cold rolling, it is customary to use a lubricating oil by pressing them side by side, and even in the case of hot rolling, lubricating oil is generally used when rolling aluminum or aluminum alloy. And as the lubricating oil in these cases,
Rolling oils prepared by mixing various additives with synthetic oils such as low-viscosity mineral oils and esters have been used for a long time. But,
Since this type of rolling oil is highly flammable, there was a risk of causing a fire during high speed rolling. Under these circumstances, in recent years, by utilizing the property of water that is non-flammable and has excellent cooling properties, low-viscosity mineral oil, synthetic oil such as ester, or oils and fats such as palm oil and beef oil are converted into water in the presence of an emulsifier. A so-called emulsion type rolling oil that has been emulsified is often used. However, since these emulsion type rolling oils are poor in emulsion stability and are a heterogeneous system, gloss wetness is likely to occur on the surface of the metal plate after rolling, rolling is poor, and abrasion powder generated during rolling is generated. There is a drawback such as the loss of rolling oil in the system when filtering and separating scum (scattering abrasion powder and oil). In addition, JP-A-60-118790
(A) carboxylic acid, sulfonic acid, naphthenic acid and other acid salts or amides, (b) alkylene glycol, (c) mineral oil, synthetic oil or fat, and (d)
A so-called water-solubilizing metal working oil in which water is solubilized in a composition consisting of water is disclosed. Although this metalworking oil is flame-retardant, it has a problem in that it does not have sufficient cooling properties and its viscosity greatly changes depending on the amount of solubilized water.

[0003]

DISCLOSURE OF THE INVENTION As a result of repeated studies to overcome various drawbacks pointed out in conventional rolling oils, the present inventors have found that a specific oxygen-containing compound, a specific fatty acid salt and water are essential components. It was found that a composition containing these three components in a predetermined range is excellent in various properties as a lubricating oil for rolling. The object of the present invention is fire fireproofing, cooling, rollability, good gloss of the metal plate surface after rolling, excellent storage stability, no oil stain occurs,
Moreover, it is an object of the present invention to provide a rolling lubricant composition capable of removing abrasion powder generated during rolling by filtration.

[0004]

The lubricant composition for rolling according to the present invention is represented by (A) water 5 to 89.95% by mass, and (B) the following formula (1) on the basis of the total amount of the composition. Oxygen-containing compound 10 to 94.95% by mass, R ¹ O— (R ³ —O) _p —R ² (1) [wherein R ¹ and R ² are independently hydrogen or C ^{1 to} C 18 R ³ represents an alkylene group having 1 to 6 carbon atoms, and p represents a number of 1 to 30. ] (C) At least one fatty acid salt selected from the following (a) to (c): 0.05 to 10% by mass, (a) Alkali metal salt of a fatty acid having 6 to 22 carbon atoms (b) 6 carbon atoms To a fatty acid having 22 to 22 carbon atoms and an alkanolamine having 1 to 15 carbon atoms (c) a salt having 6 to 22 carbon atoms and a nitrogen-containing compound represented by the following formula (2) [Here, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms,
R ⁵ represents an ethylene group or a propylene group, and q is 1 to 3
Represents a number of 0, X represents hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula-(R ⁶ -O) _r H, and R
⁶ represents an ethylene group or a propylene group, r is 1 to 30
Indicates the number of. ], The total content of the oxygen-containing compound represented by the above formula (1) and water is 80 based on the total amount of the composition.
It is characterized by being -99.95 mass%.

The water as the component (A) of the lubricant composition according to the present invention may be hard water or soft water, and therefore, it may be tap water, industrial water, ion-exchanged water, distilled water. Etc. can be used arbitrarily. The lower limit of the water content in the composition is 5% by mass, preferably 15% by mass, more preferably 25% by mass, based on the total amount of the composition, and the upper limit is 89.95% by mass, also based on the total amount of the composition, preferably Is 79.9% by mass, more preferably 69.8% by mass. When the content of water is less than 5% by mass, the cooling property of the lubricant composition is lowered and seizure is likely to occur during rolling, and when it exceeds 89.95% by mass, the lubricity is deteriorated.

The component (B) of the lubricant composition according to the present invention is defined by the above formula (1). R ¹ and R ² in the general formula each represent hydrogen or a hydrocarbon group having 1 to 18 carbon atoms, but even if R ¹ and R ² are the same,
It does not matter if they are different. And, carbon number 1-18
As the hydrocarbon group of, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a linear or branched pentyl group, a linear chain Or a branched hexyl group, a straight-chain or branched heptyl group, a straight-chain or branched octyl group, a straight-chain or branched nonyl group, a straight-chain or branched decyl group, a straight-chain or branched undecyl group 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 Each alkyl group such as a branched heptadecyl group, a straight chain or branched octadecyl group; a straight chain or branched pentenyl group, a straight chain or branched octenyl group, a straight chain or branched hexenyl group, a straight chain Is a branched heptenyl group, a straight-chain or branched octenyl group, a straight-chain or branched nonenyl group, a straight-chain or branched decenyl group, a straight-chain or branched undecenyl group, a straight-chain or branched dodecenyl group. 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, straight-chain or C5-C18 alkenyl groups such as branched octadecenyl groups; C5-C7 cyclopentyl groups, cyclohexyl groups, cycloheptyl groups, etc.
Cycloalkyl group; methylcyclopentyl group, dimethylcyclopentyl group (including all substituted isomers), methylethylcyclopentyl group (including all substituted isomers), diethylcyclopentyl group (including all substituted isomers), methyl Cyclohexyl group, dimethylcyclohexyl group (including all substitution isomers), methylethylcyclohexyl group (including all substitution isomers), diethylcyclohexyl group (including all substitution isomers), methylcycloheptyl group, dimethylcyclo C6-C11 alkylcyclo such as heptyl group (including all substitution isomers), methylethylcycloheptyl group (including all substitution isomers), diethylcycloheptyl group (including all substitution isomers) Alkyl group; aryl group such as phenyl group and naphthyl group: tolyl group (Including all isomers) xylyl, ethylphenyl group, a linear or branched propylphenyl group, a linear or branched butylphenyl group,
A straight-chain or branched pentylphenyl group, a straight-chain or branched hexylphenyl group, a straight-chain or branched heptylphenyl group, a straight-chain or branched octylphenyl group, a straight-chain or branched nonylphenyl group, A straight chain or branched decylphenyl group, a straight chain or branched undecylphenyl group,
7 to 7 carbon atoms such as linear or branched dodecylphenyl group
18 alkylaryl groups; benzyl group, phenylethyl group, phenylpropyl group (including propyl group isomers), phenylbutyl group (including butyl group isomers),
Each arylalkyl group having 7 to 12 carbon atoms such as phenylpentyl group (including isomers of pentyl group), phenylhexyl group (including isomers of hexyl group), and the like are included. Considering the compatibility between the component (B) and the component (A), R ¹ and R ² in the formula (1) are independently hydrogen,
It is preferably either an alkyl group having 1 to 18 carbon atoms, a phenyl group or an alkylaryl group having 7 to 15 carbon atoms.

In the alkylene group represented by R ³ in the formula (1),
In addition to methylene group, methylmethylene group (ethylidene group), ethylene group (having 2 or more carbon atoms); ethylmethylene group (propylidene group), dimethylmethylene group (isopropylidene group), methylethylene group (propylene group), trimethylene group ( C3 or more; n-propylmethylene group (butylidene group), isopropylmethylene group (isobutylidene group), ethylmethylmethylene group, ethylethylene group, 1,1-dimethylethylene group, 1,2-dimethylethylene group, 1 -Methyltrimethylene group, 2-methyltrimethylene group, tetramethylene group (above carbon number 4); n
-Butylmethylene group (pentylidene group), sec-butylmethylene group, isobutylmethylene group (isopentylidene group), tert-butylmethylene group, n-propylmethylmethylene group, isopropylmethylmethylene group, diethylmethylene group, n-propyl Ethylene group, isopropylethylene group, 1-ethyl-1-methylethylene group, 1
-Ethyl-2-methylethylene group, trimethylethylene group, 1-ethyltrimethylene group, 2-ethyltrimethylene group, 1,1-dimethyltrimethylene group, 1,2-dimethyltrimethylene group, 1,3-dimethyl Trimethylene group, 2,2-dimethyltrimethylene group, 1-methyltetramethylene group, 2-methyltetramethylene group, pentamethylene group (having 5 or more carbon atoms); n-pentylmethylene group (hexylidene group), (1- Methylbutyl group) methylene group, isopentylmethylene group (isopentylidene group),
(1,2-Dimethylpropyl) methylene group, n-butylmethylmethylene group, isobutylmethylmethylene group, ethyl-n-propylmethylene group, ethylisopropylmethylene group, butylethylene group, isobutylethylene group, 1
-(N-Propyl) -1-methylethylene group, 1- (n
-Propyl) -2-methylethylene group, 1-isopropyl-1-methylethylene group, 1-isopropyl-2-methylethylene group, 1,2-diethylethylene group, 1-ethyl-2,2-dimethylethylene group, Tetramethylethylene group, 1-n-propyltrimethylene group, 2-n-propyltrimethylene group, 1-isopropyltrimethylene group, 2-isopropyltrimethylene group, 1-ethyl-3
-Methyltrimethylene group, 1-ethyl-2-methyltrimethylene group, 1,1,2-trimethyltrimethylene group,
1,1,3-trimethyltrimethylene group, 1-ethyltetramethylene group, 1,1-dimethyltetramethylene group,
1,3-dimethyltetramethylene group, 1,4-dimethyltetramethylene group, 2,2-dimethyltetramethylene group, 1-methylpentamethylene group, 2-methylpentamethylene group, hexamethylene group (above 6 carbon atoms) Are included. Considering the compatibility between the component (B) and the component (A), R ^{3 in the} formula (1) is preferably an alkylene group having 2 to 6 carbon atoms. P in the formula (1) is 1 to
The number is 30 and is preferably in the range of 1-10. Incidentally, in (1) - (R ³ -O) _p - is an oxy alkylene group, when p is 2 or more, not only shows a polyoxyalkylene group of a single structure, 2 different structures At least one kind of oxyalkylene group represents a polyoxyalkylene group which is randomly copolymerized, alternating copolymerized or block copolymerized.

Among the oxygen-containing compounds usable in the present invention, R ^{1 in the} formula (1) is hydrogen, a linear or branched alkyl group having 1 to 6 carbon atoms, a phenyl group and 7 to 7 carbon atoms.
15 is a linear or branched alkylaryl group, R ² is hydrogen, R ³ is an alkylene group having 2 to 6 carbon atoms, and the oxygen-containing compound having p in the range of 1 to 10 is It is preferable because it has excellent compatibility with water. Specific examples of such preferable oxygen-containing compounds include: ethylene glycol, propylene glycol (including all isomers), butylene glycol (including all isomers), pentylene glycol (including all isomers), Hexylylene glycol (including all isomers)
Homopolymerization of one kind of glycol selected from glycols such as: Polyglycol (eg, polyglycol such as diglycol, triglycol, tetraglycol): Two or more kinds of glycol selected from glycols Copolymerized polyglycol such as random copolymer, alternating copolymer or block copolymer (for example, polyoxyethyleneoxypropylene glycol): A glycol selected from among or a monoalkyl ether compound of polyglycol (alkyl group) Is a linear or branched alkyl group having 1 to 6 carbon atoms): A monophenyl ether compound of glycol or polyglycol selected from: Monoalkyl phenyl ether compound of glycol or polyglycol selected from (alkyl) The base is carbon 1-9 linear or branched alkyl group) and a mixture of two or more compounds selected from the ~. The above copolymerized polyglycol is a copolymer of ethylene glycol and an alkylene glycol other than ethylene glycol, and the molar ratio of ethylene glycol to the other alkylene glycol constituting the copolymer is 1 to 9: 9-1, preferably 2-8: 8
The copolymerized polyglycol in the range of ˜2 has excellent solubility in water and is therefore preferred as the component (B) of the present invention. Further, although all the oxygen-containing compounds included in the above formula (1) can be used as the component (B) of the present invention, even such oxygen-containing compounds have different solubility in water. Generally speaking, among the oxygen-containing compounds defined by the formula (1), an oxygen-containing compound which becomes a uniform solution state when added to water in an addition amount described later is most desirable as the component (B), An oxygen-containing compound that is difficult to form a uniform solution (B)
When used as a component, the gloss of the surface of the metal material after rolling tends to be impaired.

The lower limit of the content of the component (B) in the lubricant composition of the present invention is 10% by mass, preferably 20% by mass, more preferably 30% by mass, based on the total amount of the composition.
The upper limit is also 94.95% by mass, preferably 84.9% by mass, more preferably 74.8% by mass, based on the total amount of the composition.
Is. When the content of the component (B) is less than 10% by mass, the lubricity deteriorates, and when it exceeds 94.95% by mass, the gloss of the surface of the metal material after rolling deteriorates. In the lubricant composition of the present invention, it is also important that the total content of the components (A) and (B) is within a predetermined range, and the lower limit of this total content is based on the total amount of the composition. It is 80% by mass, preferably 90% by mass, more preferably 95% by mass. The upper limit is 99.95% by mass based on the total amount of the composition,
This is preferably 99.9% by mass, more preferably 99.8.
It is% by mass. If the total content is less than 80% by mass, the gloss of the surface of the metal material after rolling is deteriorated, and 99.
If it exceeds 95% by mass, the lubricity deteriorates.

The fatty acid salt used as the component (C) of the present invention is selected from the following (a) to (c). (A) Alkali metal salt of fatty acid having 6 to 22 carbon atoms (b) Salt of fatty acid having 6 to 22 carbon atoms and alkanolamine having 1 to 15 carbon atoms (c) Fatty acid having 6 to 22 carbon atoms, and With a nitrogen-containing compound represented by the formula (2) [Here, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms,
R ⁵ represents an ethylene group or a propylene group, and q is 1 to 3
Represents a number of 0, X represents hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula-(R ⁶ -O) _r H, and R
⁶ represents an ethylene group or a propylene group, r is 1 to 30
Indicates the number of. ]

The fatty acids constituting the fatty acid salts shown in the above (a) to (c) are as long as they have 6 to 22 carbon atoms.
It may be a saturated fatty acid or an unsaturated fatty acid, and may be a straight chain fatty acid or a branched fatty acid. Specific examples of fatty acids constituting the fatty acid salt include hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid,
Linear and branched saturated fatty acids such as tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, icosanoic acid, heniicosanoic acid, and docosanoic acid; hexenoic acid,
Heptenoic acid, octenoic acid, nonenic acid, decenoic acid, undecenoic acid, dodecenoic acid, tridecenoic acid, tetradecenoic acid,
Mention may be made of respective straight chain and branched unsaturated fatty acids such as pentadecenoic acid, hexadecenoic acid, heptadecenoic acid, octadecenoic acid, nonadecenoic acid, eicosenoic acid, henicosenoic acid and docosenoic acid. Among them, considering the solubility in water when forming a salt, the number of carbon atoms is 10 to 18
Preferred are linear saturated fatty acids, branched saturated fatty acids, linear unsaturated fatty acids and branched unsaturated fatty acids, particularly n-
Dodecanoic acid (lauric acid), n-tridecanoic acid, n-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-
Linear saturated fatty acids and linear unsaturated fatty acids such as pentadecenoic acid, n-hexadecenoic acid, n-heptadecenoic acid, n-octadecenoic acid (oleic acid) are preferred. This is common when the base component constituting the fatty acid salt of the present invention is an alkali metal, an alkanolamine, and a nitrogen-containing compound represented by the formula (2).

The base component of the fatty acid salt (a) is an alkali metal, and sodium or potassium is usually selected as the alkali metal. The fatty acid salt (A) may be a salt of one or more types of the above fatty acids and one or more types of alkali metals. The base component of the fatty acid salt (b) component is an alkanolamine having 1 to 15 carbon atoms, and the fatty acid salt (b) is also one or more types of the above fatty acids and one or more types of alkanolamines. It can be a salt with. Alkanolamines that are the base component of the fatty acid salt (b) include monomethanolamine, dimethanolamine, trimethanolamine, monoethanolamine, diethanolamine, triethanolamine, mono-n-propanolamine, monoisopropanolamine, di- n-propanolamine, diisopropanolamine, tri-n-propanolamine, triisopropanolamine, monobutanolamine (including all isomers), dibutanolamine (including all isomers), tolbutanolamine (all (Including isomers), monopentanolamine (including all isomers), dipentanolamine (including all isomers), tripentanolamine (including all isomers), monohexanolamine (all (Including isomers of Iodixanol amine (including all isomers),
It includes monoheptanolamine (including all isomers), diheptanolamine (including all isomers), monooctanolamine (including all isomers) and the like. Among these, alkanolamines having 1 to 9 carbon atoms are preferable in view of the solubility of the fatty acid salt (b) in water. Therefore, as the fatty acid salt (b) of the present invention, a salt of at least one of the above-mentioned fatty acids having 10 to 18 carbon atoms and an alkanolamine having 1 to 9 carbon atoms is preferable, and particularly a carbon number. A salt of a 12-18 saturated or unsaturated straight-chain fatty acid and an alkanolamine having 1-9 carbon atoms is preferable.

The base component of the fatty acid salt (c) has the above-mentioned (2)
This fatty acid salt (c) is a nitrogen-containing compound represented by the formula:
Also, it may be a salt of one or more kinds of the above fatty acids and one or more kinds of nitrogen-containing compounds represented by the formula (2). In the above formula (2), the hydrocarbon group having 1 to 24 carbon atoms represented by R ⁴ includes a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group and a sec-butyl group. , Tert-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 A linear or branched decyl group, a linear 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, direct Each alkyl group such as chain or branched tricosyl group, straight chain or branched tetracosyl group; straight chain or branched pentenyl group, straight chain or branched octenyl group, straight chain or branched hexenyl group, direct 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 chain Dodecenyl group, straight or branched tridecenyl, straight or branched tetradecenyl,
Straight-chain or branched pentadecenyl group, straight-chain or branched hexadecenyl group, straight-chain or branched heptadecenyl group, straight-chain or branched octadecenyl group, straight-chain or branched nonadecenyl group, straight-chain or branched An icosenyl group of
Each alkenyl group having 5 to 24 carbon atoms such as a straight chain or branched henicosenyl group, a straight chain or branched docosenyl group, a straight chain or branched tricosenyl group, a straight chain or branched tetracosenyl group; a cyclopentyl group, Cycloalkyl group having 5 to 7 carbon atoms such as cyclohexyl group and cycloheptyl group; methylcyclopentyl group, dimethylcyclopentyl group (including all substituted isomers), methylethylcyclopentyl group (including all substituted isomers), diethyl Cyclopentyl group (including all substitution isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all substitution isomers), methylethylcyclohexyl group (including all substitution isomers), diethylcyclohexyl group (all substitutions) (Including isomers), methylcycloheptyl group, dimethylcyclohep Alkylcycloalkyl having 6 to 11 carbon atoms, such as alkyl group (including all substituted isomers), methylethylcycloheptyl group (including all substituted isomers), diethylcycloheptyl group (including all substituted isomers) Alkyl group; aryl group such as phenyl group and naphthyl group:
Tolyl group, xylyl group (including all substituted isomers), ethylphenyl group, linear or branched propylphenyl group, linear or branched butylphenyl group, linear or branched pentylphenyl group, direct A chain or branched hexylphenyl group, a straight chain or branched heptylphenyl group, a straight chain or branched octylphenyl group, a straight chain or branched nonylphenyl group, a straight chain or branched decylphenyl group,
Straight-chain or branched undecylphenyl group, straight-chain or branched dodecylphenyl group, straight-chain or branched tridecylphenyl group, straight-chain or branched tetradecylphenyl group, straight-chain or branched penta An alkylaryl group having 6 to 24 carbon atoms such as a decylphenyl group, a linear or branched hexadecylphenyl group, a linear or branched heptadecylphenyl group, a linear or branched octadecylphenyl group; a benzyl group, Phenylethyl group, phenylpropyl group (including purpyl group isomers), phenylbutyl group (including butyl group isomers), phenylpentyl group (including pentyl group isomers), phenylhexyl group (including hexyl group) C7-12 arylalkyl groups such as isomers) and the like. The nitrogen-containing compound in which R ¹ is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 5 to 18 carbon atoms, a cyclohexyl group, or an alkylcyclohexyl group having 7 to 11 carbons is a compound of the nitrogen-containing compound and a fatty acid. The salt is preferable as the basic component of the fatty acid salt (c) because the salt has an appropriate melting point and the workability in preparing the lubricant composition is excellent. R ^{5 in the} formula (2) is either an ethylene group or a propylene group (methylethylene group), but in view of the solubility of the fatty acid salt (c) in water, it is preferably an ethylene group. Although q in the formula (1) represents a number of 1 to 30, this value is preferably 3 to 20. X in the formula (2) is hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a general formula-(R ⁶ -O) _r.
A group represented by H is shown. Here, the hydrocarbon group having 1 to 24 carbon atoms includes each of the hydrocarbon groups listed above for R ⁴ , and among these, an alkyl group having 1 to 18 carbon atoms and a hydrocarbon group having 5 to 18 carbon atoms are included. An alkenyl group, a cyclohexyl group or an alkylcyclohexyl group having 7 to 11 carbon atoms is preferable. Moreover, the general formula - R in _(R ⁶ -O) _r H
^{Although 6} is either an ethylene group or a propylene group (methylethylene group), an ethylene group is preferable in view of the solubility of the fatty acid salt (c) in water. And r is a number of 1 to 30, preferably 3 to 20.

The nitrogen-containing compound represented by the formula (2) can be produced by any method, for example, a monoamine represented by the following general formula (3) or a general formula (4).
It can be easily obtained by reacting the diamine represented by: with ethylene oxide or propylene oxide. R ⁴ -NH ₂ (3) Here, R ⁴ has the same content as defined in the formula (2), and R ⁷ has 1 to 1 carbon atoms described for X in the formula (2).
The same content as the hydrocarbon group of 24 is shown.

The base component of the fatty acid salt (c) is R ⁴
And X is a linear or branched alkyl group having 1 to 18 carbon atoms, a linear or branched alkenyl group having 5 to 18 carbon atoms, a cyclohexyl group or an alkylcyclohexyl group having 7 to 11 carbon atoms, and R ⁵ is ethylene. And q is 3 to
A nitrogen-containing compound in the range of 20 (hereinafter, referred to as nitrogen-containing compound (a)) is preferable, and among these, R ⁴ and X are linear or branched alkyl groups having 1 to 18 carbon atoms,
A nitrogen-containing compound which is a cyclohexyl group or a linear or branched alkylcyclohexyl group having 7 to 9 carbon atoms, R ⁵ is an ethylene group, and q is in the range of 3 to 20 (hereinafter,
This is particularly preferable as a nitrogen-containing compound (b). Therefore, as the fatty acid salt (c) of the present invention, this has an appropriate melting point and is excellent in workability at the time of preparing the lubricant composition. A salt of at least one of the above-mentioned nitrogen-containing compounds (a) is preferable, and a salt of a saturated or unsaturated straight chain fatty acid having 12 to 18 carbon atoms and the above-mentioned nitrogen-containing compound (b) is particularly preferable.

As the component (C) of the present invention, any one or more of the above fatty acid salts (a) to (c) can be used. Then, as for each fatty acid salt, a fatty acid and a basic component may be individually added to water to form a salt in the system. Regardless of whether the salt is formed in advance or the salt is formed in the system, the lower limit of the content of the fatty acid salt blended in the lubricant composition for rolling is 0.05% by mass based on the total amount of the composition. , Preferably 0.1% by weight, more preferably 0.2% by weight, and the upper limit is also 10% by weight, preferably 5% by weight, more preferably 3% by weight based on the total amount of the composition.
It is% by mass. When the content of the fatty acid salt is less than 0.05% by mass, the lubricity is deteriorated, and when it exceeds 10% by weight, it becomes difficult to dissolve the fatty acid salt in water, and the surface of the metal plate after rolling The luster of the The component (C) of the present invention is preferably one which is completely dissolved or finely dispersed in a solution comprising both components (A) and (B).

The composition of the present invention containing the above-mentioned components (A) to (C) in an amount within the range defined above exhibits sufficient performance as a rolling lubricant by its constitution alone. One of various known additives for the purpose of improving performance.
One kind or two or more kinds can be contained in the above composition as required. Examples of such additives include anionic surfactants such as sulfates and sulfonates and nonionic surfactants such as polyoxyethylene compounds; rust inhibitors such as sulfonates, phosphates and phosphates, and boron compounds. Agents; phenolic, amine-based,
Sulfur-based, phosphorus-based, and chlorine-based antioxidants; nitrogen compounds such as benzotriazole; corrosion inhibitors such as compounds containing sulfur and nitrogen; preservatives such as phenol-based, formaldehyde donor compounds, salicylanilide compounds; silicones There is oil. When these additives are compounded in the composition of the present invention, the total compounding amount is usually 10% by mass or less, preferably 5% by mass or less, based on the total amount of the composition.
It is more preferably 2% by mass or less.

Mixing a mineral oil or a hydrocarbon-based synthetic oil into the lubricating oil composition for rolling according to the present invention makes it possible to use these as a base material for emulsion-type rolling oil or water-solubilized rolling oil. But you should avoid it. By the way,
Examples of the mineral oil to be incorporated into the composition of the present invention include, for example, a lubricating oil fraction obtained by distilling crude oil under atmospheric pressure or vacuum distillation, solvent dehistory, solvent extraction, hydrocracking, solvent dewaxing, Examples include paraffinic or naphthenic mineral oils refined by one or more purification treatments such as catalytic dewaxing, hydrorefining, sulfuric acid washing, and clay treatment, and hydrocarbon synthetic oils include poly α- Olefin oil (polybutene,
1-octene oligomers, 1-decene oligomers and hydrogenated oils thereof, etc.), alkylbenzene oils, alkylnaphthalene oils and the like. Further, the above-mentioned additives are also preferably those which are dissolved in water or dispersed in a state where water is in a continuous phase, and an additive having such properties is appropriately selected from the above-mentioned additives. Preferably.

In the lubricant composition for rolling of the present invention, when water does not form a continuous phase and when a mineral oil or a hydrocarbon-based synthetic oil is blended, uneven luster is apt to occur on the surface of a metal plate after rolling. The stability of the liquid (emulsion) is poor,
Oil stains are likely to occur, and when the abrasion powder generated in the rolling process and the scum produced by the agglomeration of the abrasion and oil components are removed by filtration, there are disadvantages such that the oil component decreases.

The lubricating oil composition of the present invention, when used as a rolling oil, has the above-mentioned components (A) to (A).
It suffices that the three components of (C) are contained in predetermined contents.
Therefore, when the composition is stored, the three components (A) to (C) can be mixed so as to have a predetermined composition, and the composition can be stored until the time of use. A composition having a lower content of water as the component (A) is prepared, stored until the time of use, and when used as a rolling oil, this composition is diluted with water to obtain the composition defined in the present invention. You may adjust to.

[0021]

INDUSTRIAL APPLICABILITY Since most of the components of the lubricant composition for rolling of the present invention are non-combustible and have a good cooling property, it is safe to use in a high speed rolling process. Since it has high rolling property and contains a special fatty acid salt, it exhibits excellent rolling property. Further, the rolling lubricant composition of the present invention has good storage stability, does not generate uneven gloss or oil stain on the surface of the metal plate after rolling, and wear powder and wear components generated in the rolling step. When the scum generated by the coagulation of the oil and the oil is removed by filtration, the oil does not decrease. Therefore, the rolling lubricant composition of the present invention is used as a lubricating oil for cold rolling of stainless steel, copper, aluminum and alloys thereof, or for hot rolling of aluminum and aluminum alloys. It is suitable for use as a lubricant for cold rolling, because it has excellent suitability as a lubricating oil, and in particular it can impart good gloss to the surface of a metal plate after rolling.

[0022]

EXAMPLES The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples. Lubricant compositions of Examples and Comparative Examples were prepared with the following compositions. Example 1 Tap water 25.8 mass% Diethylene glycol 74.0 mass% (subtotal) 99.8 mass% Oleic acid sodium salt 0.2 mass% Example 2 Tap water 39.0 mass% Dipropylene glycol 60.0 mass % (Subtotal) 99.0% by mass Oleic acid triethanolamine salt 1.0% by mass Example 3 Tap water 29.5% by mass Hexylene glycol (see Note 1) 70.0% by mass (Subtotal) 99.5% by mass % Salt of oleic acid and dicyclohexylamine ethylene oxide adduct (20 moles added) 0.5% by mass (Note 1) (2-methyl-2,4-pentanediol is the main component) Example 4 Tap water 25. 5% by mass Tripropylene glycol 74.0% by mass (subtotal) 99.5% by mass Lauric acid and oleylamine ethylene oxide adduct (Note 2) Reference) 0.5 mass% Example 5 Tap water 69.8% by mass Polyoxyethylene oxypropylene glycol mono-n-butyl ether (see Note 3) 30.0% by mass (subtotal) 99.8% by mass Sodium oleate 0.2% by mass (Note) _{3) n-C 4 H 9} O- (OE-OP) 2 -H _{where, - (OE-OP) 2} - represents a random copolymer of 1 mole and oxypropylene group 1 mole oxyethylene groups. Example 6 Water for tap water 49.0% by mass Polyoxyethylene oxypropylene glycol mono-n-butyl ether (see Note 3) 50.0% by mass (subtotal) 99.0% by mass Diethanolamine salt of lauric acid 1.0% by mass Example 7 Tap water 69.0 mass% Polyoxyethylene oxypropylene glycol mono-n-butyl ether (see note 4) 30.0 mass% (subtotal) 99.0 mass% Oleic acid diethanolamine salt 1.0 mass% (note 4) _{n-C 4 H 9 O- (} OE-OP) 12 -H _{where, - (OE-OP) 12} - shows a random copolymer of 6 moles oxyethylene group 6 moles of oxypropylene groups. Example 8 Tap water 79.0 mass% Polyoxyethylene oxypropylene glycol mono-n-butyl ether (see Note 4) 20.0 mass% (subtotal) 99.0 mass% Oleic acid triethanolamine salt 1.0 mass% Comparative example 1 Tap water 99.8 mass% Oleic acid sodium salt 0.2 mass% Comparative example 2 Tap water 26.0 mass% Diethylene glycol 74.0 mass% Comparative example 3 Tap water 25.8 mass% Diethylene glycol 44.0 mass % Sodium oleate 0.2 wt% Butyl stearate 30.0 wt% Comparative Example 4 Paraffin refined mineral oil 84.4 wt% (Kinematic viscosity 7 mm ² / s @ 40 ° C) Butyl stearate 15.0 wt% Alkenyl succinate 0.6 wt% Comparative example 5 paraffinic refined mineral oil 49.4% by weight (kinematic viscosity 7mm ² / s @ 40 ℃) Dioctyl sebacate 50.0 wt% alkenyl succinic ester 0.6 wt% Comparative Example 6 tap water 90.0 wt% paraffinic refined mineral oil 7.3 wt% (kinematic viscosity 7mm ² / s @ 40 ℃) Butyl stearate 1.5 mass% polyoxyethylene glycol monononylphenyl ether 0.6 mass% petroleum sulfonic acid sodium salt 0.6 mass% Comparative Example 7 tap water 20.0 mass% diethylene glycol 1.5 mass% paraffinic refined mineral oil 57. 0% by mass (kinematic viscosity 7 mm ² / s @ 40 ° C) Polyoxyethylene glycol monononylphenyl ether 10.0% by mass Petroleum sulfonic acid sodium salt 10.0% by mass Oleic acid 1.5% by mass Each of the above lubricating oil compositions Using the product, the following rolling test was conducted to evaluate the rolling property and the gloss of the surface of the metal plate after the rolling. The results are shown in Table 1. [Rolling processing test] Rolling conditions Rolled material: SUS430 2B material Thickness 0.5 mm x width 50 mm Work roll diameter: 51 mm φ Work roll roughness:
Ra 0.03 μm Rolling speed: 100 m / min Reduction ratio: 25% (However, in the evaluation of rollability, the reduction ratio was sequentially increased.) Oil supply method: Before the rolling roll, using a nozzle The above-mentioned lubricating oil composition was individually sprayed onto the material to be rolled and the rolling roll. Evaluation method Gloss: The surface gloss of the rolled material after being rolled three times under the above-mentioned rolling conditions was measured by a SM color computer (model SM-2: manufactured by Suga Test Instruments Co., Ltd.) at a gloss value at a right angle of 60 ° on the back surface. Was measured. Rollability: After rolling three times under the above-mentioned rolling conditions, rolling was started at a rolling reduction of 30% in the fourth rolling, and then rolling was performed by successively increasing the rolling reduction to obtain the maximum rolling reduction possible. Table 1 Lubricant composition Gloss %% Rollability % Remarks Example 1 480 60 2 500 603 3 500 604 4 480 60 5 520 58 6 6 520 58 7 520 608 8 480 58 58 Comparative Example 1 480 42 No oxygen-containing compound 2 380 45 Fatty acid salt-free 3 400 45 (See Note 5) 4 450 42 Mineral oil rolling oil 5 450 44 Mineral oil / Synthetic oil rolling oil 6 380 40 Emulsion rolling oil 7 380 40 Water-solubilized rolling oil (Note) 5) The total content of water and oxygen-containing compounds is out of the specified range of the present invention.

As is clear from the test results shown in Table 1, all of the lubricant compositions of Examples 1 to 8 according to the present invention had a good gloss on the surface of the metal plate after the rolling process and had a good rolling property. Are better. On the other hand, the lubricant compositions of Comparative Examples 1 to 7 are inferior in glossiness and rollability to the lubricant compositions of Examples 1 to 8.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location C10M 107: 34 125: 14 129: 32 129: 40 145: 26) C10N 30:06 40:24 Z (72) Inventor Junichi Shibata 8 Chidoricho, Naka-ku, Yokohama-shi Central Research Institute of Petroleum Corporation (72) Inventor Yoshitaka Natsume 8 Chidori-cho, Naka-ku Yokohama-shi Central Research Institute of Petroleum

Claims (1)

[Claims] 1. Based on the total amount of the composition, (A) water 5 to 89.95% by mass, (B) oxygen-containing compound represented by the following formula (1) 10 to 94.95% by mass, R ¹ O _{^{- (R 3 -O) p -R}} 2 (1) [ wherein, R ¹ and R ² each independently represents hydrogen or coal hydrocarbon group having 1 to 18 carbon atoms, R ³ is 1 to 6 carbon atoms Is an alkylene group, and p is a number from 1 to 30. ] (C) At least one fatty acid salt selected from the following (a) to (c): 0.05 to 10% by mass, (a) Alkali metal salt of a fatty acid having 6 to 22 carbon atoms (b) 6 carbon atoms To a fatty acid having 22 to 22 carbon atoms and an alkanolamine having 1 to 15 carbon atoms (c) a salt having 6 to 22 carbon atoms and a nitrogen-containing compound represented by the following formula (2) [Here, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms,
R ⁵ represents an ethylene group or a propylene group, and q is 1 to 3
0 represents the number of 0, X represents hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula — (R ⁶ —O) _r H, R ⁶ represents an ethylene group or a propylene group, and r Is 1-3
Indicates the number of zeros. ], The total content of the oxygen-containing compound represented by the above formula (1) and water is 8 based on the total amount of the composition.
A lubricant composition for rolling, characterized in that it is 0 to 99.95% by mass.