JP3391930B2 - Water-soluble cutting oil stock solution composition and water-soluble cutting oil composition - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stock solution of a water-soluble cutting fluid and a water-soluble cutting fluid composition, and more specifically, it is prepared by diluting with a water-soluble cutting fluid suitable for high pressure supply to a cutting site. The present invention relates to a stock solution from which the cutting fluid can be obtained.

[0002]

2. Description of the Related Art When performing cutting such as turning, planing, drilling and milling on ferrous or non-ferrous metal materials, the friction between the tool and the work material or chips, the removal of chips, the composition A cutting fluid is usually used for the purpose of preventing the generation of a cutting edge, suppressing heat generation, and cooling, thereby improving the tool life and working accuracy. Generally, cutting fluids are roughly divided into water-insoluble cutting fluids whose main purpose is lubrication and water-soluble cutting fluids whose main purpose is cooling, but conventional water-soluble cutting fluids are polyoxyethylene in water. Surfactants such as monoalkyl ethers, polyoxyethylene monoalkyl phenyl ethers, fatty acid salts and sulfonates, oily agents such as fatty acid salts and partial esters of polyhydric alcohols, extreme pressure agents such as polyoxyethylene phosphate esters, amines It is prepared by blending a rust inhibitor such as a salt, a phosphate, a molybdate, a tungstate, a borate and a nitrite.

In various machine tools using a water-soluble cutting oil, a cutting method in which the water-soluble cutting oil is supplied at a high pressure of 2.0 MPa or more has recently been drawing attention. This machining method has the advantage that the chips can be made smaller and the chips can be quickly removed from the cutting location, so that wear of the tool is reduced and the tool life is extended. However, when a conventional water-soluble cutting fluid is supplied to the cutting location at a high pressure, the load on the supply pump is large, and the vanes and rings of the supply pump are significantly worn. Not only becomes violently foaming, but also becomes difficult to separate from the lubricating oil used in machine tools. A water-soluble cutting fluid containing a silicone-based defoaming agent is also known for the purpose of suppressing excessive foaming during high-pressure supply, but this type of water-soluble cutting fluid has a defoaming effect due to the consumption of the defoaming agent. Has the drawback of being attenuated.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention As a result of repeated studies to solve the above-mentioned drawbacks found in conventional water-soluble cutting fluids, the present inventors have found that specific block-type polyoxyalkylene compounds, fatty acids, and basic It has been found that an aqueous composition containing a compound as an essential component has the original performance of a water-soluble cutting fluid and does not have the above-mentioned drawbacks. Therefore, one of the objects of the present invention is to eliminate the disadvantages that occur when a conventional water-soluble cutting fluid is supplied at high pressure without sacrificing the lubricity and cooling properties that the water-soluble cutting fluid must have. To do. A further object of the present invention is to provide a lubricating property and a cooling property which are not inferior to those of conventional water-soluble cutting fluids and, even when a high pressure is supplied to a cutting location, cause a hindrance to the cutting process. It is intended to provide a water-soluble cutting oil agent and its undiluted solution which have good separability from a lubricating oil used in a machine tool without being accompanied by considerable foaming.

[0005]

A stock solution composition for a water-soluble cutting fluid according to the present invention comprises (A) a block-type polyoxyalkylene compound represented by the following formula (1) in an amount of 15 to 50% by mass, (B) 1.0 to 15% by mass of fatty acids having 8 to 10 carbon atoms, (C) alkali metal hydroxide, aliphatic amine, alicyclic amine, aromatic amine, alkanolamine, polyamine and At least one basic compound selected from the nitrogen-containing compounds represented by the following formula (2) is at least the neutralization equivalent of the component (B) but not more than 100% , and (B)
A water-soluble cutting fluid stock solution composition containing the component and the component (C) in a total amount of 1.1 to 85% by mass, and further containing 0 to 60% by mass of water. ^{_{HO- (R 1 -O) a -}} (R 2 -O) b - (R 3 -O) c -H (1) ( where, ^{R 1} and ^{R 3} represent propylene radical, the ^{R 2} is an ethylene group Where a and c each represent an integer of 1 to 40, b represents an integer of 3 to 40, and 15 ≦ a + b +.
satisfy c ≦ 100,1.0 ≦ (a + c ) / b ≦ 3.5. )

[Chemical 3] (However, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms, R ^4
5 represents an ethylene group or a propylene group, d is 1 to 30
X is hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula — (R ⁶ —O) _e , and R ⁶
Represents an ethylene group or a propylene group, and e represents an integer of 1 to 30. ) The water-soluble cutting fluid according to the present invention, a water-based agent,
Based on the total amount of the composition, (A) the block type polyoxyalkylene compound represented by the formula (1) is 0.3 to 10% by mass, and (B) the fatty acid having 8 to 10 carbon atoms is 0.02 to 3.0. %, And (C) at least one base selected from alkali metal hydroxides, aliphatic amines, alicyclic amines, aromatic amines, alkanolamines, polyamines and nitrogen-containing compounds represented by formula (2). It is characterized in that the organic compound is contained in an amount equal to or more than the neutralization equivalent of the fatty acid and increased by 100% or less .

The block-type polyoxyalkylene compound which is the component (A) of the present invention is represented by the formula (1) . If the oxyethylene group is represented by EO and the oxypropylene group is represented by PO, the formula (1) becomes It can be rewritten as the following general formula. HO- (PO) _a- (EO) _b- (PO) _c- H The component (A) of the present invention is PO-EO- in which a polyoxyethylene group is sandwiched between polyoxypropylene groups as described above.
It is important that the block-type polyoxyalkylene compound has a PO structure. By the way, even if it is a polyoxyalkylene compound, a copolymer in which oxyethylene groups and oxypropylene groups are bonded randomly or alternately, or a block type copolymer having an EO-PO structure,
When used in place of the components, the load of the cutting fluid supply pump cannot be reduced, and therefore the wear of the pump cannot be reduced. In the above general formula,
a, b and c represent the degree of polymerization of the oxyalkylene group for each block, a and c are each an integer of 1 to 40, preferably 5 to 20, and b is 3 to 40, preferably 5 to 20. It is an integer. The upper limit value of a + b + c, which represents the total degree of polymerization of the oxyalkylene group in the component (A), is 100, preferably 60, and the lower limit value is 15, preferably 30. If the total degree of polymerization exceeds 100,
Since the polyoxyalkylene compound itself becomes viscous, it becomes difficult to handle, and if it is less than 15, foaming of the resulting water-soluble cutting fluid cannot be sufficiently suppressed. Further, (a + c) / b represents a ratio (PO / EO ratio) of the degree of polymerization of oxypropylene groups and oxyethylene groups in the block-type polyoxyalkylene compound,
Its upper limit is 3.5 and its lower limit is 1.0, preferably 1.5. When the PO / EO ratio exceeds 3.5 , the water solubility of the polyoxyalkylene compound decreases,
If it is less than 1.0, foaming of the resulting water-soluble cutting fluid cannot be sufficiently suppressed. In the block type polyoxyalkylene compound used in the present invention,
In terms of the ratio of the degree of polymerization of the two polyoxypropylene blocks constituting this, that is, a / c in the above general formula, in terms of the ease of handling of the compound, the water-soluble cutting fluid It is more preferable that 0.33 ≦ a / c ≦ 3.0 is satisfied in that the foamability is further reduced. In the present invention,
As long as it is a block-type polyoxyalkylene compound represented by the above general formula and satisfying the incidental conditions, it can be used alone as the component (A), as well as an oxypropylene group and / or an oxyethylene group. It is possible to mix two or more kinds of block-type polyoxyalkylene compounds having different degrees of polymerization within predetermined conditions and use them as the component (A). In the stock solution composition of the present invention, the upper limit of the content of the component (A) is 50% by mass, preferably 45% by mass, and the lower limit is 15% by mass, preferably 20% by mass. If the component (A) is contained in excess of the upper limit value and the content of the component (A) is less than the lower limit value, the stock solution composition may be diluted with water to prepare a cutting fluid. ,
The wear of the supply pump cannot be reduced.

The component (B) of the present invention has 8 to 10 carbon atoms,
It is preferably a fatty acid having 8 to 9 carbon atoms. Fatty acids having 7 or less carbon atoms are not preferable in terms of odor and corrosiveness,
A fatty acid having 11 or more carbon atoms is not preferable because it cannot sufficiently suppress the foaming of the water-soluble cutting oil obtained by blending the fatty acid, and the separability from the lubricating oil used in the machine tool is deteriorated. The fatty acid used as the component (B) may be a straight chain or a branched chain, and may be a saturated fatty acid or an unsaturated fatty acid, but is a saturated fatty acid. preferable. Examples of usable fatty acids include linear or branched octanoic acid,
Linear or branched nonanoic acid, linear or branched decanoic acid, linear or branched octenoic acid, linear or branched nonenic acid, linear or branched decenoic acid, etc. Is mentioned. Each of these fatty acids is used alone or as a mixture of two or more kinds in the component (B) of the present invention. The upper limit of the content of the component (B) in the stock solution composition of the present invention is 15% by mass, preferably 12% by mass, and the lower limit is 1.0% by mass, preferably 5.0% by mass. is there. It is ineffective to contain the component (B) in excess of this upper limit, and in addition, there is a problem that foaming increases when the cutting oil is diluted. On the other hand, when the content of the component (B) is less than the lower limit value, the rust preventive property deteriorates.

As the basic compound which is the component (C) of the present invention, an alkali metal hydroxide can be used, as well as an aliphatic amine, an alicyclic amine, an aromatic amine, an alkanolamine, a polyamine and a nitrogen-containing compound described later. Various amines such as compounds can be optionally used. Examples of alkali metal hydroxides include sodium hydroxide and potassium hydroxide. Examples of the aliphatic amine usable in the present invention include monomethylamine, dimethylamine, trimethylamine, monoethylamine, diethylamine, triethylamine, monopropylamine (including all isomers), dipropylamine (including all isomers). , Tripropylamine (including all isomers), monobutylamine (including all isomers), dibutylamine (including all isomers), tributylamine (including all isomers), monopentylamine ( All isomers), dipentylamine (all isomers), tripentylamine (all isomers), monohexylamine (all isomers), dihexylamine (all isomers) , Monoheptylamine (including all isomers), diheptylamine (including all isomers) Mu), monooctylamine (including all isomers), monononylamine (including all isomers), monodecylamine (including all isomers), monoundecyl (including all isomers), mono Dodecylamine (including all isomers), dodecyldimethylamine (including all isomers), monotridecylamine (including all isomers),
An alkylamine having 1 to 15 carbon atoms exemplified by monotetradecylamine (including all isomers) and monopentadecylamine (including all isomers); exemplified by monobenzylamine, dibenzylamine, etc. 7 to 15 carbon atoms
Aromatic substituted alkylamines. Among these, alkylamines having 3 to 10 carbon atoms and 7 to 7 carbon atoms
Aromatic substituted alkylamines of 15 are preferred.

Similarly, examples of the alicyclic amine include monocyclopentylamine, dicyclopentylamine, tricyclopentylamine, monocyclohexylamine, dicyclohexylamine, monocycloheptylamine, dicycloheptylamine and the like having 5 to 15 carbon atoms. Cycloalkylamine; (methylcyclopentyl) amine (including all substituted isomers), bis (methylcyclopentyl) amine (including all substituted isomers), bis (dimethylcyclopentyl) amine (including all substituted isomers) ), (Methylethylcyclopentyl) amine (including all substituted isomers), (diethylcyclopentyl) amine (including all substituted isomers), bis (methylcyclohexyl) amine (including all substituted isomers), ( Dimethylcyclohexyl) ami (Including all substituted isomers), (methylethylcyclohexyl) amine (including all substituted isomers), (diethylcyclohexyl) amine (including all substituted isomers), (methylcycloheptyl) amine (all (Including substituted isomers), (dimethylcycloheptyl) amine (including all substituted isomers),
6 to 14 carbon atoms exemplified by (methylethylcycloheptyl) amine (including all substituted isomers) and (diethylcycloheptyl) amine (including all substituted isomers)
Alkylcycloalkylamines and the like. Among these, cycloalkylamine having 5 to 15 carbon atoms is preferable.

Examples of the aromatic amine usable in the present invention include aromatic amines having 6 to 8 carbon atoms such as aniline, toluidine and xylidine. Similarly, as the alkanolamine, monomethanolamine, dimethanolamine, trimethanolamine, monoethanolamine, diethanolamine, triethanolamine, mono (n-propanol) amine, di (n-propanol)
Amine, tri (n-propanol) amine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, monobutanolamine (including all isomers), dibutanolamine (including all isomers), tributanolamine ( All isomers), monopentanolamine (all isomers included), dipentanolamine (all isomers included),
Tripentanolamine (including all isomers), monohexanolamine (including all isomers), dihexanolamine (including all isomers), monoheptanolamine (including all isomers), Diheptanolamine (including all isomers), monooctanolamine (including all isomers), monononanolamine (including all isomers), monodecanolamine (including all isomers), Monoundecanolamine (including all isomers), Monododecanolamine (including all isomers), Diethylmonoethanolamine, Diethylmonopropanolamine (including all isomers), Diethylmonobutanolamine ( (Including all isomers), diethylmonopentanolamine (including all isomers), dipropylmonoethano Amine (including all isomers),
Dipropylmonopropanolamine (including all isomers), Dipropylmonobutanolamine (including all isomers), Dipropylmonopentanolamine (including all isomers), Dibutylmonoethanolamine (all Isomers included), dibutylmonopropanolamine (includes all isomers), dibutylmonobutanolamine (includes all isomers), monoethyldiethanolamine, monoethyldipropanolamine (includes all isomers), Monoethyldibutanolamine (includes all isomers), Monoethyldipentanolamine (includes all isomers), Monopropyldiethanolamine (includes all isomers), Monopropyldipropanolamine (includes all isomers) Body), monopropyldibutanolamine (all isomers , Etc.), monobutyldiethanolamine (including all isomers), monobutyldipropanolamine (including all isomers), monobutyldibutanolamine (including all isomers), etc. 1 to 15 alkanolamines. Among these, alkanolamines having 1 to 9 carbon atoms are preferable. Further, as the polyamine usable in the present invention,
Ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, propylenediamine, dipropylenetriamine, tripropylenetetramine, tetrapropylenepentamine, pentapropylenehexamine, hexapropyleneheptamine, N,
The number of carbon atoms is 1 to 1 as exemplified by N-dimethylethylenediamine, N, N-diethylethylenediamine and the like.
18 and a polyamine having 2 to 7 amino groups.

The nitrogen-containing compounds other than the above which can be used as the component (C) of the present invention are represented by the following formula (2) .

[Chemical 4] (However, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms, R ^4
5 represents an ethylene group or a propylene group, d is 1 to 30
X is hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula — (R ⁶ —O) _e , and R ⁶
Represents an ethylene group or a propylene group, and e represents an integer of 1 to 30. ) 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,
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, linear 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 Further, each alkyl group such as a branched eicosyl group, a linear or branched heneicosyl group, a linear or branched docosyl group, a linear or branched tricosyl group, or a linear or branched tetracosyl group is included. In addition, the hydrocarbon group for R ⁴ includes a straight-chain or branched pentenyl group, a straight-chain or branched hexenyl group, a straight-chain or branched heptenyl group, a straight-chain or branched octenyl group, a straight-chain or branched nonenyl group. 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, straight-chain or branched octadecenyl group, straight-chain or branched nonadecenyl group, straight-chain or branched eicosenyl group, straight-chain or branched heneicosenyl group, straight-chain Or a branched docosenyl group, a straight chain or branched tricosenyl group, a straight chain or branched tetracosenyl group, Which alkenyl group having 5 to 24 carbon atoms; cycloalkyl group having 5 to 7 carbon atoms such as cyclopentyl group, cyclohexyl group, cycloheptyl group; methylcyclopentyl group, dimethylcyclopentyl group (including all substituted isomers), methyl Ethylcyclopentyl group (including all substituted isomers),
Diethylcyclopentyl group (including all substituted isomers), methylcyclohexyl group, dimethylcyclohexyl group (including all substituted isomers), methylethylcyclohexyl group (including all substituted isomers), diethylcyclohexyl group (all (Including substitution isomers), methylcycloheptyl group, dimethylcycloheptyl group (including all substitution isomers), methylethylcycloheptyl group (including all substitution isomers), diethylcycloheptyl group (all substitution isomers) C6 to C11 alkylcycloalkyl group such as phenyl group, naphthyl group or the like aryl group: tolyl group, xylyl group (including all substituted isomers), ethylphenyl group, straight chain or branched Propylphenyl group, linear or branched butylphenyl group, linear or branched pentyl Phenyl 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 a branched undecylphenyl group, a linear or branched dodecylphenyl group, a linear or branched tridecylphenyl group, a linear or branched tetradecylphenyl group, a linear or branched pentadecylphenyl group,
An alkylaryl group having 6 to 24 carbon atoms such as a linear or branched hexadecylphenyl group, a linear or branched heptadecylphenyl group, a linear or branched octadecylphenyl group; a benzyl group, a 1-phenylethyl group, 2 -Phenylethyl group (phenethyl group), phenylpropyl group (including isomers of propyl group), phenylbutyl group (including isomers of butyl group), phenylpentyl group (including isomers of pentyl group), phenylhexyl C7-12 arylalkyl groups such as groups (including isomers of hexyl groups); and the like. And a hydrocarbon group R
⁴ is preferably an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 5 to 18 carbon atoms, a cyclohexyl group having 5 to 7 carbon atoms, or an alkylcyclohexyl group having 7 to 11 carbon atoms. R ⁵ in the formula (2) is either an ethylene group or a propylene group (methylethylene group), and preferably an ethylene group. D in the formula (2) represents an integer of 1 to 30, and 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) _e.
The hydrocarbon group having 1 to 24 carbon atoms referred to herein includes each of the hydrocarbon groups listed above for R ⁴ , and among these, a hydrocarbon group having 1 to 18 carbon atoms is also included. Alkyl group, C5-C18 alkenyl group, C5-C7
And a cyclohexyl group having 7 to 11 carbon atoms are preferred. In addition, the general formula:-(R ^6-
R ⁶ in O) _e is either an ethylene group or a propylene group (methylethylene group), and is preferably an ethylene group. And e is an integer of 1 to 30, preferably 3 to 20.

[0013] an additional note just in case, the nitrogen-containing compound represented by the formula (2) may be prepared by any method, For example <br/> example, motor Noamin [R ^{4 -NH} (R 4 has the formula Definition of (2)
Shows the same content as. )] Or a diamine represented by the following formula (3) and ethylene oxide or propylene oxide can be easily obtained.

[Chemical 5] (In formula (3), ^{R 4} and X represents the definition and <br/> same content of the formula (2).)

In the nitrogen-containing compound included in the formula (2) , R ⁴ and X are linear or branched alkyl groups having 1 to 18 carbon atoms, or linear or branched alkenyl groups having 5 to 18 carbon atoms. , A cyclohexyl group having 5 to 7 carbon atoms or an alkylcyclohexyl group having 7 to 11 carbon atoms, R ⁵ is an ethylene group, and d is more preferably a nitrogen-containing compound in the range of 3 to 20, particularly R ⁴ And X has 1 carbon atom
To a linear or branched alkyl group having 18 to 18, a cyclohexyl group having 5 to 7 carbon atoms or a linear or branched alkyl cyclohexyl group having 7 to 9 carbon atoms, R ⁵ is an ethylene group, and d is in the range of 3 to 20. Particularly preferred are the nitrogen-containing compounds in.

The component (C) of the present invention includes the above-mentioned alkali metal hydroxides, aliphatic amines, alicyclic amines, aromatic amines, alkanolamines, polyamines and formulas.
One or more basic compounds selected from the group consisting of the nitrogen-containing compounds shown in (2) can be optionally used. Among these basic compounds, alkali metal hydroxides and carbon atoms of 1 to 1 can be used. 15 alkanolamine, a nitrogen-containing compounds represented by formula (2) are preferable, especially, sodium hydroxide, Ca potassium, alkanolamines having 1 to 9 carbon atoms, a nitrogen-containing represented by the formula (2) Of the compounds
R ⁴ and X are linear or branched alkyl groups having 1 to 18 carbon atoms, cyclohexyl groups having 5 to 7 carbon atoms or 7 carbon atoms
To 9 linear or branched alkyl cyclohexyl group, R ⁵ is ethylene group, Oh in the range of d is 3 to 20
Particularly preferred are nitrogen-containing compounds. The amount of the basic compound as the component (C) is determined by diluting the stock solution composition with water.
In the sense of ensuring the solubility of the fatty acids of water as the component (B), (B) component of the neutralizing equivalent or more, Ru necessary der not more than 100% higher. The total content of the component (B) and the component (C) in the stock solution composition of the present invention is 1.1 to
It is in the range of 85% by mass, and if this amount is less than 1.1% by mass, the rust preventive property is deteriorated, and if it exceeds 85% by mass, the wear of the supply pump is reduced when diluted with water to form a cutting fluid. Not only can you not do it, but the bubbling becomes severe.

The component (D) of the present invention is water, which may be hard water or soft water. Therefore, tap water, industrial water, ion-exchanged water, distilled water or the like can be arbitrarily used as this water. The stock solution composition of the present invention may be a composition containing no water at all, but in general, the solubility of the metal corrosion inhibitor and other additives optionally added to the stock solution composition is taken into consideration. The amount of water in the stock solution composition, that is, the amount of the component (D) is 10 to 10 based on the total amount of the stock solution composition.
It is preferably about 50% by mass. A water-soluble cutting fluid suitable for practical use, particularly suitable for supplying to a cutting site at high pressure, can be obtained by diluting the stock solution composition of the present invention with water, and the dilution ratio can be arbitrarily selected. . However, in terms of machinability, rust prevention, and flammability,
The dilution ratio is preferably in the range of 5 to 50 times (weight ratio), more preferably in the range of 10 to 40 times (weight ratio). For dilution, tap water, industrial water, ion-exchanged water, distilled water or the like can be used.

The water-soluble cutting fluid composition of the present invention is usually
It can be obtained by diluting the above-mentioned stock solution composition of the present invention with water, but the stock solution composition stored in a state of having less water or more water than this stock solution composition is diluted with water before use. The water-soluble cutting oil composition of the present invention can also be used. The water-soluble cutting oil composition of the present invention is based on water, and the total amount of the composition is 0.3 to 10% by mass of the component (A) and 0.02 to 3.0% by mass of the component (B). , (C) component equal to or more than the neutralization equivalent of (B) component , 100
The composition contains more than% . In the water-soluble cutting oil composition of the present invention, the upper limit of the content of component (A) is 10% by mass, preferably 5.0% by mass, and the lower limit is 0.3.
It is mass%, preferably 0.5 mass%. Even if the component (A) is contained in an amount exceeding the upper limit, it is not effective in improving the performance of the oil agent composition. However, if the amount of the component (A) is less than the lower limit value, it is not possible to reduce the wear of the pump used when the oil solution composition is supplied to the cutting site under high pressure.
Similarly, the upper limit of the content of the component (B) in the oil agent composition is 3.0% by mass, preferably 2.0% by mass, and the lower limit is 0.02% by mass, preferably 0%. 0.1% by mass
Is. Even if the component (B) is contained in an amount exceeding the upper limit, it is not effective in improving the performance of the oil agent composition, and foaming becomes severe. When the amount of the component (B) is below the lower limit, the rust preventive action of the oil agent composition decreases. As in the case of the stock solution composition, the amount of the component (C) in the oil composition is at least not less than the neutralization equivalent of the fatty acid which is the component (B), so that the solubility of the component (B) in water is improved. It is necessary to secure the amount, but if it is excessively high, the pH of the oil agent composition may be excessively increased, which may corrode the metal.
The content of the basic compound, which is the component (C), is 100% more than the neutralization equivalent or less .

The oil agent composition of the present invention containing water as a base and containing the components (A) to (C) in the amounts defined above functions sufficiently as a water-soluble cutting oil agent as it is. If necessary, known additives that are usually blended with existing water-soluble cutting fluids can be added to the product. For example, adding a water-soluble metal corrosion inhibitor to the oil agent composition of the present invention is effective in improving the rust preventive action of the oil agent composition, and as a water-soluble metal corrosion inhibitor usable for that purpose, , Boric acid, tungstic acid, molybdic acid,
Sodium and potassium salts of inorganic acids such as phosphoric acid, carbonic acid, sulfuric acid, silicic acid, nitric acid, nitrous acid; benzotriazole, methylbenzotriazole, tolyltriazole,
Examples thereof include triazoles such as hydrocarbyltriazole and salts thereof; thiazoles such as mercaptobenzothiazole and salts thereof; fatty acid alkanolamides; imidazolines; oxazolines. In addition, phenol-based, amine-based, sulfur-based, phosphorus-based, chlorine-based antioxidants; preservatives such as phenol-based, formaldehyde donor compounds, salicylanilide-based compounds; antifoaming agents such as silicone oils; esters, alcohols, etc. Oily agent; anionic surfactants such as sulfuric acid and sulfonate; one or more known additives exemplified by nonionic surfactants such as polyoxyethylene compounds, if necessary, It can also be added to the oil agent composition of the invention. When a known additive including a water-soluble metal corrosion inhibitor is added to the oil agent composition of the present invention, the total addition amount is based on the total amount of the oil agent composition and is usually selected in the range of 3.0% by mass or less. . The additives as described above can be added to the stock solution composition of the present invention, and the total addition amount in that case is usually selected in the range of 15.0% by mass or less based on the total amount of the stock solution composition.

[0019]

EFFECTS OF THE INVENTION The water-soluble cutting oil composition of the present invention exhibits performance comparable to that of the conventional water-soluble cutting oil even if it is supplied to the cutting portion of a cutting machine under normal pressure. , Even when supplied at a higher pressure (generally 2.0 to 15 MPa, typically 5.0 to 15 MPa), it sufficiently functions as a cutting fluid and may foam to such an extent that it interferes with cutting work. Absent. In addition, since the water-soluble cutting oil composition of the present invention does not apply an excessive load to the supply pump even when it is supplied under high pressure, wear of the supply pump can be reduced. It is also excellent in separability from mechanical lubricating oil. The water-soluble cutting oil composition of the present invention can be used as a cutting oil, as well as rolling oil, pressing oil, drawing oil, heat-treating oil, metal-working oil such as DI can manufacturing oil, and water-soluble hydraulic oil. Can also be used.

[0020]

EXAMPLES The contents of the present invention will be described more specifically below with reference to Examples and Comparative Examples, but the present invention is not limited thereto. Examples 1 to 6 and Comparative Examples 1 to 8 The water-soluble cutting fluid stock solution composition according to the present invention has the composition shown in the upper row of Table 1, and the water-soluble cutting fluid stock solution composition for comparison is shown in the upper row of Table 2. Each of the stock solutions was diluted with tap water 30 times (by weight) to obtain a water-soluble cutting oil composition of the present invention and a water-soluble cutting oil composition for comparison. With respect to each of the water-soluble cutting oil compositions thus obtained, the wear property of the pump when pressure-supplied by the pump,
The foamability and the separability from the mechanical lubricating oil were evaluated by the following methods. The results are shown in Tables 1 and 2. (Test Method) Using an abrasive Vickers (V104WC) pump, the oil agent compositions of Examples and Comparative Examples were individually pressured at 6.86 MPa.
Was discharged for 100 hours, and the total amount of wear of the vane of the pump and the ring was measured for each oil composition. 600 ml of the oil agent compositions of Examples and Comparative Examples were individually housed in a graduated cylinder having a foaming property of 1000 ml, and the oil agent composition was circulated in the graduated cylinder at a circulation rate of 4650 ml / min using a circulation pump. After 10 minutes and 15 minutes, the volume (including the amount of foam) of the oil agent composition was measured to evaluate the amount of foam. Separability from mechanical lubricating oil Based on JIS K 2520, each oil agent composition of Examples and Comparative Examples and mechanical lubricating oil (Uniway D68; made by Nippon Oil Co., Ltd.) were stirred and mixed at 1500 rpm for 5 minutes, and then each mixture was mixed. The sample was placed in a graduated cylinder and allowed to stand for 24 hours. When the supernatant layer was transparent, it was judged as ◯, and when it was clouded, it was judged as ×, and the separability from the mechanical lubricating oil was evaluated. The components used in Examples and Comparative Examples are shown below. (A) Component A1: Block type polyoxyalkylene compound (PO-
EO-PO structure) Average total degree of polymerization = 40, average PO / EO ratio = 1.8, average PO / PO ratio = 1.0) A2: Block-type polyoxyalkylene compound (PO-
EO-PO structure) Average total degree of polymerization = 40, average PO / EO ratio = 2.3, average PO / PO ratio = 1.0) A3: Block type polyoxyalkylene (PO-EO-
PO structure) Average total degree of polymerization = 40, average PO / EO ratio = 3.0, average PO / PO ratio = 1.0 A4: Block-type polyoxyalkylene compound (PO-
EO-PO structure) Average total degree of polymerization = 50, average PO / EO ratio = 2.5, average PO / PO ratio = 1.0 A5: Block-type polyoxyalkylene compound (PO-
EO-PO structure) Average total degree of polymerization = 12, average PO / EO ratio = 2.5, average PO / PO ratio = 1.0 A6: Block type polyoxyalkylene compound (PO-
EO-PO structure) Average total degree of polymerization = 40, average PO / EO ratio = 0.5, average PO / PO ratio = 1.0 A7: Block type polyoxyalkylene compound (PO-
EO structure) Average total degree of polymerization = 40, average PO / EO ratio = 2.3 A8: Random type polyoxyalkylene compound Average total degree of polymerization = 40, average PO / EO ratio = 2.3 A9: Polyoxyethylene mono ( Nonylphenyl) ether average degree of polymerization = 10 (B) component B1: 3,5,5-trimethylhexanoic acid B2: n-octanoic acid B3: oleic acid B4: lauric acid (C) component C1: triethanolamine C2: diethanolamine C3: Dibutylmonoethanolamine and other water-soluble metal corrosion inhibitors borax (Na ₂ B ₄ O ₇ · 10H ₂ O) benzotriazole silicone oil emulsion (F, Dow Corning, F
S Antifoam 025, Viscosity at 25 ° C 600mPa
・ S)

[0021]

[Table 1]

[0022]

[Table 2]

As is clear from the test results shown in Tables 1 and 2, the oil agent compositions of Examples 1 to 6 containing the predetermined amounts of the components (A) to (C) specified in the present invention were used as a feed pump. The wear amount, foamability, and separability from the mechanical lubricating oil are all in satisfactory ranges. On the other hand, in place of the component (A) defined in the present invention, the oil agent composition of Comparative Example 1 using a block type polyoxyalkylene compound having a small total degree of polymerization or a composition having a small PO / EO ratio is used. Comparative example 2
The oil agent composition of (1) has a large amount of foaming. Also, PO-EO-
The oil agent compositions of Comparative Examples 3 and 4 using the polyoxyalkylene compound other than the PO structure, like the oil agent composition of Comparative Example 7 in which the component (A) is not mixed, have a large amount of wear of the supply pump. . Furthermore, the oil agent compositions of Comparative Examples 5 and 6 using saturated or unsaturated fatty acids having 11 or more carbon atoms which do not correspond to the component (B) of the present invention also have large foaming. The foaming of the oil agent composition of Comparative Example 9 using silicone oil as the defoaming agent increases with time.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI C10M 133: 04 C10M 149: 14 149: 14 149: 22 149: 22) C10N 10:02 C10N 10:02 30:06 30:06 30:18 30:18 40:22 40:22 (56) Reference JP-A-61-103995 (JP, A) JP-A-7-316581 (JP, A) US Patent 4452711 (US, A) US Patent 4452712 (US, A) US Patent 4670168 (US, A) US Patent 3374171 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C10M 173/00-173/02 C10M 103/06 C10M 105/22-105/24 C10M 105/58-105/66 C10M 107/34 C10M 107/44 C10M 125/10 C10M 129/28-129/46 C10M 133/04-133/14 C10M 145/26-145 / 38 C10M 149/14 C10M 149/22 C10N 10:02 C10N 30:06 C10N 30:18 C10N 40:22

Claims (2)

(57) [Claims] 1. Based on the total amount of the composition, (A) a block type polyoxyalkylene compound represented by the following formula (1) is contained in an amount of 15 to 50% by mass, and (B) a fatty acid having 8 to 10 carbon atoms is 1.0. To 15% by mass, (C) at least one selected from alkali metal hydroxides, aliphatic amines, alicyclic amines, aromatic amines, alkanolamines, polyamines and nitrogen-containing compounds represented by the following formula (2). The basic compound of (B) above is equal to or more than the neutralization equivalent of the component (B) and less than or equal to 100% , and
A water-soluble cutting fluid stock solution composition containing the component and the component (C) in a total amount of 1.1 to 85% by mass, and further containing 0 to 60% by mass of water. ^{_{HO- (R 1 -O) a -}} (R 2 -O) b - (R 3 -O) c -H (1) ( where, ^{R 1} and ^{R 3} represent propylene radical, the ^{R 2} is an ethylene group Where a and c each represent an integer of 1 to 40, b represents an integer of 3 to 40, and 15 ≦ a + b +.
satisfy c ≦ 100,1.0 ≦ (a + c ) / b ≦ 3.5. ) [Chemical 1] (However, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms, R ^4
5 represents an ethylene group or a propylene group, d is 1 to 30
X is hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula — (R ⁶ —O) _e , and R ⁶
Represents an ethylene group or a propylene group, and e represents an integer of 1 to 30. ) 2. A water-based water-soluble cutting oil composition, wherein the block type polyoxyalkylene compound represented by the following formula (1) (A) is contained in an amount of 0.3 to 10% by mass, (B) 0.02 to 3.0% by mass of a fatty acid having 8 to 10 carbon atoms, and (C) an alkali metal hydroxide, an aliphatic amine, an alicyclic amine, an aromatic amine, an alkanolamine. , A water-soluble cutting oil composition containing at least one basic compound selected from polyamines and nitrogen-containing compounds represented by the following formula (2) in an amount equal to or more than the neutralization equivalent of the component (B) and not more than 100% . . ^{_{HO- (R 1 -O) a -}} (R 2 -O) b - (R 3 -O) c -H (1) ( where, ^{R 1} and ^{R 3} represent propylene radical, the ^{R 2} is an ethylene group Where a and c each represent an integer of 1 to 40, b represents an integer of 3 to 40, and 15 ≦ a + b +.
satisfy c ≦ 100,1.0 ≦ (a + c ) / b ≦ 3.5. ) [Chemical 2] (However, R ⁴ represents a hydrocarbon group having 1 to 24 carbon atoms, R ^4
5 represents an ethylene group or a propylene group, d is 1 to 30
X is hydrogen, a hydrocarbon group having 1 to 24 carbon atoms or a group represented by the general formula — (R ⁶ —O) _e , and R ⁶
Represents an ethylene group or a propylene group, and e represents an integer of 1 to 30. )