JP2022083091A - Water-soluble metalworking oil composition - Google Patents

Abstract

To provide means to increase dispersibility in metalworking liquid.SOLUTION: A dispersant for a water-soluble metalworking oil is represented by the following general formula (I) and includes an amine compound I having an HLB of 9 or more. There is also provided a water-soluble metalworking oil composition including the same, a method for increasing dispersibility using the same, and a metalworking method [where R1 represents a C8-18 hydrocarbon group, R2, R3, and R4 each independently represent a hydrogen atom or a C1-3 hydrocarbon group, A1 and A2 each independently represent a single bond or a polyoxyalkylene group, A3 represents a polyoxyalkylene group, L is a C1-8 hydrocarbon group, and p is an integer of 0 or 1].SELECTED DRAWING: None

Description

The present invention relates to a dispersant for a water-soluble metal processing oil, a water-soluble metal processing oil composition containing the dispersant, a method for improving dispersibility using the dispersant, and a metal processing method.

In the field of metal processing such as cutting and grinding, metal processing oils are used for the purpose of improving processing efficiency, suppressing friction between the work material and the tool that processes the work material, extending the life of the tool, and removing chips. Is used. The metalworking oils include those containing oils such as mineral oils, animal and vegetable oils, and synthetic oils as main components, and those obtained by blending a compound having a surface activity with the oils to impart water solubility. In recent years, water-soluble metalworking oils having been imparted with water solubility have been widely used in view of safety and the like, for example, in view of suppressing fire caused by heat generation during processing.

The water-soluble processing oil is usually diluted with water and used as a metal processing liquid (coolant). Chip dispersibility in this metalworking liquid is one of the important performances. If the chip dispersibility is low, oily mud-like insoluble matter is generated due to dirt and agglomeration of chips inside the machine tool. Oily mud-like insoluble matter is known to cause a decrease in production efficiency due to processing defects and an increase in man-hours such as cleaning and removal, and studies are being conducted to improve dispersibility. For example, Patent Document 1 proposes a water-soluble metalworking oil having excellent chip dispersibility, which contains an alkylene oxide adduct of a specific diamine. The conventional techniques for improving the dispersibility of water-soluble metalworking oils such as Patent Document 1 have been aimed at improving the dispersibility by including a specific component in the metalworking oil. Therefore, the specifications (composition) of the water-soluble metalworking oil itself are changed, and the production line can be stopped and only a part or all of the oil can be replaced. Further, since the alkylene oxide adduct of diamine of Patent Document 1 is not a general-purpose product, there is a problem in terms of manufacturing cost.
There is a demand for a technique for improving dispersibility by post-addition to existing water-soluble metalworking oils and metalworking liquids.

Japanese Unexamined Patent Publication No. 11-80769

In such a situation, a new means for improving the dispersibility in the metal processing liquid is required.

［式中、
Ｒ^１は、炭素数８～１８の炭化水素基を表し、
Ｒ^２、Ｒ^３およびＲ^４はそれぞれ独立して水素原子または炭素数１～３の炭化水素基を表し、
Ａ^１およびＡ^２はそれぞれ独立して単結合またはポリオキシアルキレン基を表し、
Ａ^３はポリオキシアルキレン基を表し、
Ｌは炭素数１～８の炭化水素基を表し、
ｐは０または１の整数である。］
［２］ Ｒ^１は、炭素数８～１８のアルキル基またはアルケニル基であり、
Ｒ^２、Ｒ^３およびＲ^４は水素原子であり、
Ａ^１およびＡ^２はそれぞれ独立して単結合またはポリオキシアルキレン基であり、
Ａ^３はポリオキシアルキレン基であり、
Ｌは炭素数１～８のアルキレン基であり、
ｐは０または１の整数である、［１］に記載の分散剤。
［３］ ｐは０である、［１］または［２］に記載の分散剤。
［４］ 切粉分散剤である、［１］～［３］のいずれかに記載の分散剤。
［５］ ［１］～［４］のいずれかに記載の分散剤と水溶性金属加工油剤とを含む、水溶性金属加工油組成物。
［６］ 前記アミン化合物Ｉは、前記水溶性金属加工油組成物の合計質量１００質量％に対して、０．１質量％以上含まれる、［５］に記載の水溶性金属加工油組成物。
［７］ 前記アミン化合物Ｉは、前記水溶性金属加工油剤のうちの水を除く成分の合計質量１００質量部に対して、０．１質量部以上の量で含まれる、［５］または［６］に記載の水溶性金属加工油組成物。
［８］ ［１］～［４］のいずれかに記載の分散剤と、水溶性金属加工油剤と、希釈水とを含む金属加工液
［９］ 切削加工または研削加工に用いられる、［１］～［４］のいずれかに記載の分散剤、［５］～［７］のいずれかに記載の水溶性金属加工油組成物または［８］に記載の金属加工液。
［１０］ 水溶性金属加工油剤または金属加工液の分散性を向上する方法であって、
水溶性金属加工油剤、金属加工に用いる前の金属加工液、または金属加工に用いた後の金属加工液に［１］～［４］のいずれかに記載の分散剤を添加する工程を含む、方法。
［１１］ 前記分散剤は、前記アミン化合物Ｉの量が水溶性金属加工油剤のうちの水を除く成分の合計質量１００質量部に対して０．１質量部以上の量となるように、添加される、［１０］に記載の方法。
［１２］ ［５］～［８］のいずれかに記載の水溶性金属加工油組成物または［９］に記載の金属加工液を用いて金属材を加工する工程を含む、金属加工方法。
［１３］ 金属加工方法であって、
水溶性金属加工油剤と希釈水とを含む金属加工液を用いて金属材を加工する工程を含み、
前記加工の工程前、工程中、および工程後の少なくとも一つの段階で、前記金属加工液に［１］～［４］のいずれかに記載の分散剤を添加することを特徴とする、方法。
［１４］ 前記分散剤は、前記アミン化合物Ｉの量が前記金属加工液の合計質量１００質量部に対して０．２～１質量部の範囲となるように、添加される、［１３］に記載の方法。
［１５］ 前記加工は切削加工または研削加工である、［１３］または［１４］に記載の方法。 The present invention includes the following embodiments.
[1] A dispersant for a water-soluble metalworking oil, which is represented by the following general formula (I) and contains an amine compound I having an HLB of 9 or more.

[During the ceremony,
R ¹ represents a hydrocarbon group having 8 to 18 carbon atoms.
R ² , R ³ and R ⁴ independently represent a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms, respectively.
A ¹ and A ² independently represent a single bond or a polyoxyalkylene group, respectively.
A ³ represents a polyoxyalkylene group
L represents a hydrocarbon group having 1 to 8 carbon atoms.
p is an integer of 0 or 1. ]
[2] R ¹ is an alkyl group or an alkenyl group having 8 to 18 carbon atoms.
^{R2 ,} R3 and ^R4 are hydrogen atoms and
A ¹ and A ² are independent single bonds or polyoxyalkylene groups, respectively.
A ³ is a polyoxyalkylene group
L is an alkylene group having 1 to 8 carbon atoms.
The dispersant according to [1], wherein p is an integer of 0 or 1.
[3] The dispersant according to [1] or [2], wherein p is 0.
[4] The dispersant according to any one of [1] to [3], which is a chip dispersant.
[5] A water-soluble metalworking oil composition containing the dispersant according to any one of [1] to [4] and a water-soluble metalworking oil.
[6] The water-soluble metalworking oil composition according to [5], wherein the amine compound I is contained in an amount of 0.1% by mass or more based on 100% by mass of the total mass of the water-soluble metalworking oil composition.
[7] The amine compound I is contained in an amount of 0.1 part by mass or more with respect to 100 parts by mass of the total mass of the components of the water-soluble metalworking oil excluding water, [5] or [6]. ] The water-soluble metalworking oil composition according to.
[8] A metalworking liquid containing the dispersant according to any one of [1] to [4], a water-soluble metalworking oil, and diluted water [9] Used for cutting or grinding [1]. The dispersant according to any one of [4], the water-soluble metalworking oil composition according to any one of [5] to [7], or the metalworking liquid according to [8].
[10] A method for improving the dispersibility of a water-soluble metalworking oil or a metalworking liquid.
A step of adding the dispersant according to any one of [1] to [4] to a water-soluble metal processing oil, a metal processing liquid before being used for metal processing, or a metal processing liquid after being used for metal processing. Method.
[11] The dispersant is added so that the amount of the amine compound I is 0.1 part by mass or more with respect to 100 parts by mass of the total mass of the components of the water-soluble metalworking oil excluding water. The method according to [10].
[12] A metal processing method comprising a step of processing a metal material using the water-soluble metal processing oil composition according to any one of [5] to [8] or the metal processing liquid according to [9].
[13] This is a metal processing method.
Including the step of processing a metal material using a metal processing liquid containing a water-soluble metal processing oil and diluted water.
A method comprising adding the dispersant according to any one of [1] to [4] to the metal processing liquid at at least one step before, during, and after the processing.
[14] The dispersant is added to [13] so that the amount of the amine compound I is in the range of 0.2 to 1 part by mass with respect to 100 parts by mass of the total mass of the metal processing liquid. The method described.
[15] The method according to [13] or [14], wherein the processing is cutting or grinding.

The present invention has one or more of the following effects.
(1) A dispersant that can be added to a metal processing oil or a metal processing liquid by post-addition to improve the dispersibility, a method for improving the dispersibility using the dispersant, and a metal processing method are provided.
(2) Since the dispersibility can be improved by adding the metal processing oil or the metal processing liquid after the metal processing before and after the metal processing, it is not necessary to change the design of the metal processing oil itself.
(2) A novel water-soluble metalworking oil having excellent dispersibility is provided.

Hereinafter, embodiments of the present invention will be described in detail. The present invention is not limited to the following embodiments, and can be arbitrarily modified and implemented without departing from the gist thereof.
The upper and lower limits of the numerical range described herein can be combined arbitrarily. For example, when "A to B" and "C to D" are described, the range of "A to D" and "C to B" is also included in the scope of the present invention as a numerical range. Further, the numerical range "lower limit value to upper limit value" described in the present specification means that it is equal to or more than the lower limit value and equal to or less than the upper limit value.

The meanings of the terms and the like described in the present specification will be described below.
"Hydrocarbon group" means a linear, cyclic or branched saturated or unsaturated hydrocarbon having a specified number of carbon atoms minus one or more hydrogen atoms. Specific examples thereof include an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, an alkylaryl group, an arylalkyl group, an alkylene group and an alkenylene group.
By "alkyl group" is meant a linear or branched monovalent saturated aliphatic hydrocarbon group having a specified number of carbon atoms.
By "cycloalkyl group" is meant a cyclic monovalent saturated aliphatic hydrocarbon group having a specified number of carbon atoms.
By "alkylene group" is meant a linear, cyclic or branched divalent saturated aliphatic hydrocarbon group having a specified number of carbon atoms.
By "alkenyl group" is meant a linear or branched monovalent hydrocarbon group having a specified number of carbon atoms and at least one carbon-carbon double bond. By "alkenylene group" is meant a straight or branched divalent hydrocarbon group having a specified number of carbon atoms and at least one carbon-carbon double bond. Examples of "alkenyl" and "alkenylene" include, but are not limited to, monoene, diene, triene and tetraene.
By "aryl group" is meant an aromatic hydrocarbon cyclic group.
The "alkylaryl group" means an aryl to which one or more alkyls are bonded.
"Arylalkyl group" means an alkyl bonded to an aryl ring.
The "polyoxyalkylene group" means a divalent group composed of a polymerized chain of alkylene oxide, and specifically, "-(RO) _m- " (R is independently each time it appears. It represents an alkylene group, and m is an integer of 1 or more).

1. 1. Dispersant One embodiment of the present invention relates to a dispersant for a water-soluble metalworking oil, which comprises an amine compound I represented by the following general formula (I) (hereinafter, also simply referred to as “amine compound I”).

The amine compound I of the present embodiment is added to a water-soluble metal processing oil or a metal processing liquid (coolant) diluted with a water-soluble metal processing oil to disperse chips and the like in the metal processing liquid generated during metal processing. Can be improved and aggregation can be suppressed.

In the present specification, "chips" are, for example, metal chips (cutting chips, etc.) generated in metal processing, metal chips discharged from a machine tool (for example, grinding chips discharged from a grinding machine, etc.), and the like. ).
As used herein, the term "dispersible" means the property that fine particles existing in a metal processing liquid such as chips and stains are dispersed without forming aggregates. The particles can be, for example, in diameter ranging from the micrometer scale to the millimeter scale (eg 1 μm to 10 mm).
As used herein, "chip dispersity" means, for example, the property that chips disperse without forming aggregates of chips or aggregates of chips and other substances.
As used herein, the term "dispersant" refers to an additive for dispersing fine particles such as chips and stains in a metal processing liquid.
As used herein, the "chip dispersant" suppresses, for example, the formation of aggregates between chips and / or aggregates between chips and other substances, and disperses the chips in a metalworking solution. An additive for this purpose.

The HLB of the amine compound I used in this embodiment is 9 or more. Good dispersibility can be obtained by using the amine compound I in such a range. In particular, the amine compound I of the present embodiment is excellent in dispersibility (particularly, chip dispersibility) of fine particles contained in the metal processing liquid. Therefore, in some embodiments, the dispersant is a chip dispersant.
From the viewpoint of dispersibility, the HLB of the amine compound I is more preferably 10 or more, still more preferably 11 or more. In one embodiment, the HLB of amine compound I is 12 or greater. The upper limit of the HLB of the amine compound I is not particularly limited, but is preferably 19 or less, more preferably 18 or less, still more preferably 17 or less, from the viewpoint of compatibility with the coolant. The HLB of the amine compound I is, for example, preferably 9 to 19, more preferably 10 to 18, and even more preferably 11 to 17 from the viewpoint of dispersibility and compatibility with the coolant. In one embodiment, the HLB of amine compound I is 12-17.
In addition, in this specification, HLB is an abbreviation of Hydrophile-lipophilic balance (hydrophilic lipophilic balance), and is an index which shows the balance between a hydrophilic group and a lipophilic group in the molecule of a surfactant. In the present specification, HLB refers to a value calculated by the Griffin method.

In formula (I), R ¹ represents a hydrocarbon group having 8 to 18 carbon atoms (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, or 18). The number of carbon atoms of the hydrocarbon group is preferably 10 to 18, more preferably 11 to 18, and even more preferably 12 to 18 from the viewpoint of lubricity and solubility.

Hydrocarbon groups are, for example, alkyl groups such as octyl, nonyl, decyl, undecyl, dodecyl (lauryl), tridecyl, tetradecyl, bentadecyl, hexadecyl, heptadecyl, octadecyl (stearyl); octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl. , Tetradecenyl, pentadecenyl, octadecenyl (oleyl, etc.) and other alkyl groups (the position of the double bond is arbitrary); dimethylcyclohexyl, ethylcyclohexyl, methylcyclohexylmethyl, cyclohexylethyl, propylcyclohexyl, butylcyclohexyl, heptylcyclohexyl, etc. , Cycloalkyl group; aryl group such as naphthyl, anthracenyl, biphenyl, turphenyl; alkylaryl group such as dimethylphenyl, butylphenyl, nonylphenyl, dimethylnaphthyl; arylalkyl group such as phenylethyl, diphenylmethyl and the like.
The hydrocarbon group may be of synthetic or natural origin. For example, the hydrocarbon group may be a naturally occurring mixed alkyl group or alkenyl group such as palm alkyl, beef tallow alkyl, hardened beef tallow alkyl, soybean alkyl and the like. Naturally-derived hydrocarbon groups (such as mixed alkyl or mixed alkenyl) include multiple hydrocarbon groups with different carbon atoms. For example, coconut alkyl usually contains a saturated or unsaturated linear aliphatic hydrocarbon group in the range of 12 to 16 carbon atoms as a main component. Beef tallow alkyl usually contains a saturated or unsaturated linear aliphatic hydrocarbon group in the range of 16 to 18 carbon atoms as a main component. Hardened beef tallow alkyl usually contains a saturated or unsaturated aliphatic hydrocarbon group in the range of 10 to 18 carbon atoms as a main component. In the present invention, the main component of the naturally occurring hydrocarbon group (for example, 50% by mass or more of the hydrocarbon group) has a predetermined carbon number range (6 to 30, more preferably 8 to 24, more preferably 8 to 24 carbon atoms). Those occupying 10 to 22, particularly preferably 12 to 20) can be used as ^R1 .

From the viewpoint of lubricity and solubility, R ¹ is preferably linear with 8 to 18 carbon atoms (more preferably 10 to 18 carbon atoms, still more preferably 11 to 18 carbon atoms, and particularly preferably 12 to 18 carbon atoms). Alternatively, it is a branched saturated or unsaturated aliphatic hydrocarbon group, more preferably 8 to 18 carbon atoms (more preferably 10 to 18 carbon atoms, still more preferably 11 to 18 carbon atoms, and particularly preferably 12 to 18 carbon atoms. ), And more preferably selected from coconut alkyl, beef alkyl, lauryl, oleyl, and stearyl.

In formula (I), R ² to R ⁴ independently represent a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms. Examples of the hydrocarbon group having 1 to 3 carbon atoms include methyl, ethyl, propyl and the like. From the viewpoint of flux adhesion, R ² to R ⁴ are preferably hydrogen atoms.

In formula (I), p is an integer of 0 or 1.
From the viewpoint of dispersibility, p is preferably an integer of 0. That is, in one embodiment, the amine compound I is a monoamine.

In formula (I), L represents a hydrocarbon group having 1 to 8 carbon atoms (1, 2, 3, 4, 5, 6, 7, or 8). From the viewpoint of dispersibility, L is preferably a linear or branched alkylene group or alkenylene group having 1 to 6 carbon atoms (more preferably 2 to 5 carbon atoms, still more preferably 3 to 4 carbon atoms). , More preferably a linear or branched alkylene group having 1 to 8 carbon atoms (preferably 1 to 6 carbon atoms, more preferably 2 to 5 carbon atoms, still more preferably 3 to 4 carbon atoms). It is preferably a linear alkylene group having 1 to 8 carbon atoms (preferably 1 to 6 carbon atoms, more preferably 2 to 5 carbon atoms, still more preferably 3 to 4 carbon atoms).

In formula (I), A ¹ and A ² independently represent a single bond or polyoxyalkylene group, respectively.
When A ¹ and / or A ² are single bonds, it means that R ² and R ³ are directly bonded to the nitrogen atom (N).
^In formula (I), A3 represents a polyoxyalkylene group.

The polyoxyalkylene group in A ¹ to A ³ is not particularly limited, but those in which HLB is included in the above range are preferable. For example, polyoxyethylene, polyoxypropylene, polyoxyisopropylene, polyoxybutylene, polyoxy1,2-butylene, polyoxy2,3-butylene, polyoxypentylene, polyoxyoctylene and the like can be mentioned.
The polyoxyalkylene groups in A ¹ , A ² and A ³ (A ¹ to A ³ ) preferably have 1 to 6 carbon atoms (more preferably 1 to 4 carbon atoms, still more preferably 1 to 3 carbon atoms). It is a divalent group composed of a polymerized chain of alkylene oxide, more preferably a group composed of a polymerized chain of alkylene oxide having 2 to 3 carbon atoms (that is, polyoxyethylene, polyoxypropylene). More preferably, it is polyoxyethylene.
The polyoxyalkylene groups of A ¹ to A ³ may be the same or different. Further, the polyoxyalkylene groups A ¹ to A ³ may be formed by randomly or blocking alkylene oxides having different carbon atoms. For example ^, the polyoxyalkylene groups A1 to A3 may be formed by bonding ^an ethylene oxide (EO) group and a propylene oxide (PO) group at random or in a block.
The number of repetitions (average number of moles added) of the alkylene oxide unit constituting the polyoxyalkylene group of A ¹ to A ³ is not particularly limited as long as HLB is included in the above range, but for example, A ¹ to A ³ The total number of repetitions (average number of added moles) of the alkylene oxide units constituting the polyoxyalkylene group is in the range of 1 to 45 (preferably 5 to 30, more preferably 10 to 30).

In one embodiment, in formula (I), p is 1, and A ¹ to A ³ are all polyoxyalkylene groups. In such a case, the dispersibility is excellent.
In one embodiment, in formula (I), p is 0, A ² is a single bond, and A ³ is a polyoxyalkylene group. In such a case, the dispersibility is excellent.
In one embodiment, in formula (I), p is 0 and both A ² and A ³ are polyoxyalkylene groups. In such a case, the dispersibility is excellent.

In one embodiment, the amine compound I is, in the above general formula (I), R ¹ is an alkyl group or an alkenyl group having 8 to 18 carbon atoms.
R ² to R ⁴ are hydrogen atoms, and they are hydrogen atoms.
A ¹ and A ² are independent single bonds or polyoxyalkylene groups, respectively.
A ³ is a polyoxyalkylene group
L is an alkylene group having 1 to 8 carbon atoms.
p is a compound, which is an integer of 0 or 1.
In this embodiment, preferred embodiments of R ¹ , A ¹ to A ³ , L, and p are as described above.

In one embodiment, the amine compound I is represented by the following general formula (II).

In formula (II), the definitions and preferred embodiments of ^R1 to ^R4 , L, and p are the same as in formula (I).
In formula (II), m1 and m2 each independently represent the average number of moles of ethylene oxide added of 0 or more.
In formula (II), m3 represents the average number of moles of ethylene oxide added above zero.
The upper limit of m1 to m3 is not particularly limited, but may be, for example, 15 or less, 10 or less, 8 or less, or 7 or less independently of each other. It is preferable that m1 to m3 are set so that the HLB of the amine compound I is in a predetermined range.
As an example, m1 and m2 are numbers of 0 or more and 15 or less (preferably 0 or more and 6 or less), and m3 is a number of 0 or more and 15 or less (preferably more than 0 and 6 or less).
For example, m1 + m2 + m3 is more than 0 and 45 or less (preferably a number of 5 or more and 30 or less, more preferably 10 or more and 30 or less).

The amine compound I in the above form can be used as it is as a dispersant (particularly a chip dispersant). Alternatively, a mixture of the amine compound I in the above form together with other dispersant components can be used as a dispersant (particularly a chip dispersant).

In one embodiment, the dispersant comprises the amine compound I of the above embodiment and other dispersant components. Examples of other dispersant components include, but are not limited to, imide compounds and the like. In this embodiment, the content of the amine compound I and other dispersant components in the dispersant is not particularly limited. For example, when the imide compound is contained as another dispersant component, the compounding (mass ratio) of the amine compound I and the imide compound in the dispersant is in the range of 1: 5 to 2: 1 (preferably 1: 3 to 1: 1). It can be in the range of 1).

2. 2. Water-soluble metalworking oil composition One embodiment of the present invention is a water-soluble metalworking oil composition (hereinafter, "metal") containing the dispersant of the above-mentioned form and a water-soluble metalworking oil (hereinafter, also referred to as "metalworking oil"). Also referred to as "processing oil composition"). The specific embodiment of the dispersant is the same as that described in "1. Dispersant" above. In some cases, the metalworking oil composition may contain another compound produced by modification or reaction of at least a part of the blended components, and such a form may also contain the metalworking oil composition of the present invention. It shall be included in the thing. By blending the dispersant together with the metalworking oil, a metalworking oil composition having excellent dispersibility (particularly chip dispersibility) can be obtained.

The dispersant preferably contains the amine compound I in the metalworking oil composition in a range of 0.1% by mass or more with respect to the total mass of 100% by mass of the water-soluble metalworking oil composition. .. The content of the amine compound I in the metalworking oil composition is more preferably in the range of 0.1 to 15% by mass, further preferably in the range of 0.5 to 10% by mass, and particularly preferably in the range of 1 to 1 to 10% by mass. It is in the range of 5% by mass.
The content of the amine compound I in the metal processing oil composition is preferably 0.1 part by mass or more with respect to 100 parts by mass of the total mass of the components of the water-soluble metal processing oil excluding water. It is more preferably in the range of 0.1 to 16.5 parts by mass, further preferably in the range of 0.5 to 11 parts by mass, and particularly preferably in the range of 1 to 5.5 parts by mass.

(Water-soluble metalworking oil)
The composition of the water-soluble metalworking oil is not particularly limited, and conventionally known water-soluble metalworking oils can be used. For example, the water-soluble metal processing oil is a component used in the conventional water-soluble metal processing oil, for example, fatty acids, amines (excluding the amine compound I represented by the above formula (I)), and an oil-based agent. , Surfactant, antifoaming agent, antibacterial agent, antioxidant, metal deactivating agent, extreme pressure agent, water, base oil, etc. be able to.

(Fatty acids)
Examples of the fatty acid include fatty acids, hydroxy fatty acids, aliphatic dicarboxylic acids, fatty acid dimer acids, and polymerized fatty acids of hydroxy unsaturated fatty acids. The fatty acids may be used alone or in combination of two or more.
Examples of the fatty acid include octanoic acid, 2-ethylhexanoic acid, decanoic acid, neodecanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, pentadecanoic acid, heptadecanoic acid, nonadecanoic acid, myristic acid, palmitic acid, stearic acid and arakin. Saturated aliphatic monocarboxylic acids such as acids, behenic acids and isostearic acids, and octenoic acid, nonenic acid, decenoic acid, undecenoic acid, oleic acid, ellagic acid, erucic acid, nervonic acid, linoleic acid, γ-linolenic acid, Examples thereof include unsaturated aliphatic monocarboxylic acids such as arachidonic acid, α-linolenic acid, stearidonic acid, eicosapentaenoic acid and docosahexaenoic acid.
Further, a mixture of unsaturated fatty acids such as tall oil fatty acid, soybean oil fatty acid, palm oil fatty acid, flaxseed oil fatty acid, rice bran oil fatty acid, and cottonseed oil fatty acid may be used.
The carbon number of the fatty acid is preferably 8 to 30, more preferably 10 to 25, and even more preferably 10 to 20.

Examples of the hydroxy fatty acid include hydroxylauric acid, hydroxymyristic acid, hydroxypalmitic acid, hydroxystearic acid, hydroxyarakinic acid, hydroxybehenic acid, hydroxyoctadecenoic acid and the like.
The number of carbon atoms of the hydroxy fatty acid is preferably 8 to 30, more preferably 10 to 25, and even more preferably 10 to 20.

Examples of the aliphatic dicarboxylic acid include sebacic acid, dodecanedioic acid, dodecyl succinic acid, lauryl succinic acid, stearyl succinic acid, isostearyl succinic acid and the like.
The carbon number of the aliphatic dicarboxylic acid is preferably 8 to 30, more preferably 10 to 25, and even more preferably 10 to 20.

Examples of the hydroxy unsaturated fatty acid constituting the polymerd fatty acid of the hydroxy unsaturated fatty acid include ricinoleic acid (12-hydroxyoctadeca-9-enonic acid). Further, a fatty acid mixture containing ricinoleic acid such as castor oil may be used.
The polymerized fatty acid of the hydroxy unsaturated fatty acid includes a condensed fatty acid which is a dehydrated polycondensate of a hydroxy unsaturated fatty acid, an alcoholic hydroxyl group of a condensed fatty acid which is a dehydrated polycondensate of a hydroxy unsaturated fatty acid, and a monocarboxylic acid. Examples thereof include condensed fatty acids obtained by dehydrating and condensing.

The content of fatty acids is not particularly limited. In one embodiment, the content of fatty acids is preferably 5 to 70% by mass, more preferably 7 to 60% by mass, still more preferably 10 to 10 to 70% by mass, based on the total amount (100% by mass) of the metalworking oil excluding water. It is 50% by mass. Further, in one embodiment, the content of fatty acids is preferably 2 to 60% by mass, more preferably 3 to 50% by mass, still more preferably 5 to 40, based on the total amount (100% by mass) of the metalworking oil. It is mass%.

(Amines)
The water-soluble metalworking oil may contain amines other than the amine compound I represented by the above formula (I).
The amines include monoamines having one aminonitrogen atom in one molecule, diamines having two aminonitrogen atoms in one molecule, and polyamines having three or more aminonitrogen atoms in one molecule. You may. Among them, monoamine is preferable from the viewpoint of making a water-soluble metal processing oil which can be a metal processing liquid having further improved antibacterial property, rust preventive property, processability and the like.

As monoamines, depending on the number of substituents R, a primary amine represented by the following formula (i), a secondary amine represented by the following formula (ii), and a secondary amine represented by the following formula (iii). Classified as a tertiary amine.

In the above formula, R independently indicate a substituent. The plurality of Rs may be the same or different from each other. Examples of the substituent include an alkyl group, an alkyl group having a hydroxyl group, an alkenyl group, a cycloalkyl group, a phenyl group, a benzyl group and the like.

Examples of the alkyl group that can be selected as the substituent R include a methyl group, an ethyl group, a propyl group (n-propyl group, i-propyl group), and a butyl group (n-butyl group, i-butyl group, s). -Butyl group, t-butyl group), pentyl group (n-pentyl group, i-pentyl group, neopentyl group), hexyl group, heptyl group, octyl group, 2-ethylhexyl group, nonyl group, decyl group, undecyl group, Examples thereof include a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group and the like.
The alkyl group may be a linear alkyl group or a branched chain alkyl group.
The number of carbon atoms of the alkyl group is preferably 1 to 30, more preferably 1 to 20, still more preferably 1 to 10, still more preferably 1 to 6, and particularly preferably 1 to 4.

Examples of the alkyl group having a hydroxyl group that can be selected as the substituent R include a group in which at least one hydrogen atom of the above-mentioned alkyl group is substituted with a hydroxyl group.
The alkyl group constituting the group may also be a linear alkyl group or a branched chain alkyl group.
The alkyl group having a hydroxyl group preferably has 1 to 30, more preferably 1 to 20, still more preferably 1 to 10, still more preferably 1 to 6, and particularly preferably 2 to 4.

Examples of the alkenyl group that can be selected as the substituent R include an ethenyl group (vinyl group), a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, an octenyl group, a nonenyl group, a decenyl group and a dodecenyl group. Examples thereof include a group, a tridecenyl group, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group, an octadecenyl group and the like.
The alkenyl group may be a linear alkenyl group or a branched chain alkenyl group.
The carbon number of the alkenyl group is preferably 1 to 30, more preferably 1 to 20, still more preferably 1 to 10, still more preferably 1 to 6, and particularly preferably 1 to 3.

Examples of the cycloalkyl group that can be selected as the substituent R include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantyl group and the like.

Further, as the amines, an alkanolamine having at least one alkyl group having a hydroxyl group may be contained.
Examples of the alkanolamine include a primary alkanolamine in which R in the formula (i) is an alkyl group having a hydroxyl group, and a secondary alkanol in which at least one of R in the formula (ii) is an alkyl group having a hydroxyl group. Examples thereof include amines and tertiary alkanolamines in which at least one of R in the formula (iii) is an alkyl group having a hydroxyl group.

Examples of the primary alkanolamine include ethanolamine, propanolamine, butanolamine, 2-amino-2-methyl-1-propanol and the like.

Examples of the secondary alkanolamine include N-methylethanolamine, N-ethylethanolamine, N-propylethanolamine, N-butylethanolamine, N-octylethanolamine, N-stearylethanolamine and N-oleylethanol. Monoethanolamines such as amines, N-cyclohexylethanolamines, N-phenylethanolamines, N-benzylethanolamines; N-methylpropanolamines, N-ethylpropanolamines, N-propylpropanolamines, N-butylpropanolamines, N -Monopropanol amines such as octylpropanolamine, N-stearylpropanolamine, N-oleylpropanolamine, N-cyclohexylpropanolamine, N-phenylpropanolamine, N-benzylpropanolamine; diethanolamine, dipropanolamine and the like can be mentioned.

Examples of the tertiary alkanolamine include N-dimethylethanolamine, N-diethylethanolamine, N-dipropylethanolamine, N-dibutylethanolamine, N-dioctylethanolamine, N-distearylethanolamine, and N-. Monoethanolamine such as dioleylethanolamine, N-dicyclohexylethanolamine, N-diphenylethanolamine, N-dibenzylethanolamine; N-dimethylpropanolamine, N-diethylpropanolamine, N-dipropylpropanolamine, N- Monopropanolamines such as dibutylpropanolamine, N-dioctylpropanolamine, N-distearylpropanolamine, N-diorail propanolamine, N-dicyclohexylpropanolamine, N-diphenylpropanolamine, N-dibenzylpropanolamine; N- Diethanolamines such as methyldiethanolamine, N-ethyldiethanolamine, N-propyldiethanolamine, N-butyldiethanolamine, N-octyldiethanolamine, N-stearyldiethanolamine, N-oleyldiethanolamine, N-cyclohexyldiethanolamine, N-phenyldiethanolamine, N-benzyldiethanolamine. N-Methyldipropanolamine, N-ethyldipropanolamine, N-propyldipropanolamine, N-butyldipropanolamine, N-octyldipropanolamine, N-stearyldipropanolamine, N-oleyldipropanolamine, Dipropanolamines such as N-cyclohexyldipropanolamine, N-phenyldipropanolamine and N-benzyldipropanolamine; triethanolamine, tripropanolamine and the like can be mentioned.

It preferably contains an alicyclic amine.
As the alicyclic amine, a primary alicyclic amine in which R in the formula (i) is a cycloalkyl group, and a secondary fat in which at least one of R in the formula (ii) is a cycloalkyl group. Cyclic amines and tertiary alicyclic amines in which at least one of the Rs in the formula (iii) is a cycloalkyl group can be mentioned.

Examples of the primary alicyclic amine include N-cyclohexylamine and the like.
Examples of the secondary alicyclic amine include monocyclohexylamines such as N-methylcyclohexylamine, N-ethylcyclohexylamine, N-propylcyclohexylamine and N-oleylcyclohexylamine; N-cyclohexylethanolamine and N-cyclohexyl. Monocyclohexylalkanolamines such as propanolamine; N-dicyclohexylamines and the like can be mentioned.
Examples of the tertiary alicyclic amine include dialkyl monocyclohexylamines such as N-dimethylcyclohexylamine, N-diethylcyclohexylamine, N-dipropylcyclohexylamine, N-diorailcyclohexylamine and N-dicyclohexylamine; -Monocyclohexyldialkanolamines such as cyclohexyldiethanolamine and N-cyclohexyldipropanolamine; monoalkyldicyclohexylamines such as N-methyldicyclohexylamine, N-ethyldicyclohexylamine, N-propyldicyclohexylamine and N-oleyldicyclohexylamine; N- Dicyclohexylalkanolamines such as dicyclohexylethanolamine and N-dicyclohexylpropanolamine; tricyclohexylamine and the like can be mentioned.

The amines may be used alone or in combination of two or more.
The content of amines is not particularly limited. In one embodiment, the content of amines is preferably 3 to 70% by mass, more preferably 5 to 60% by mass, still more preferably 7 to 7 to 70% by mass based on the total amount (100% by mass) of the metalworking oil excluding water. It is 50% by mass. Further, in one embodiment, the content of amines is preferably 2 to 40% by mass, more preferably 4 to 35% by mass, still more preferably 6 to 30 based on the total amount (100% by mass) of the metalworking oil. It is mass%.
(Oil-based agent)
Examples of the oily agent include alcohols such as lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, and oleyl alcohol. These may be used alone or in combination of two or more.
The blending amount of the oil-based agent is not particularly limited, but is preferably in the range of 0.01% by mass or more and 5% by mass or less with respect to the total mass of the metalworking oil.

(Surfactant)
Examples of the surfactant include anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants and the like. Examples of the anionic surfactant include polyoxyethylene alkyl ether carboxylic acid, polyoxyethylene alkyl ether phosphoric acid, alkylbenzene sulfonic acid, α-olefin sulfonic acid, and salts thereof. Examples of the cationic surfactant include quaternary ammonium salts such as alkyltrimethylammonium salt, dialkyldimethylammonium salt and alkyldimethylbenzylammonium salt. Nonionic surfactants include ethers such as polyoxyethylene alkyl ether and polyoxyethylene alkyl phenyl ether, esters such as sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene fatty acid ester, and fatty acid alkanol. Examples include amides such as amides. Examples of the amphoteric tenside include alkyl betaine as a betaine system. These can be used alone or in combination of two or more.
The blending amount of the surfactant is not particularly limited, but is, for example, in the range of 0.01% by mass or more and 10% by mass or less, preferably 0.01% by mass or more and 5% by mass, based on the total mass of the metalworking oil. It is in the range of% or less.

(Emulsification aid)
Examples of the emulsifying aid include unsaturated fatty acid esters such as methyl oleate, ethyl oleate, and propyl oleate; aromatic alcohols such as 2-phenoxyethanol and 2-phenylethyl alcohol; and the like. These can be used alone or in combination of two or more.
The preferable blending amount of the emulsifying aid is not particularly limited, but is, for example, in the range of 0.001% by mass or more and 5% by mass or less with respect to the total mass of the metalworking oil.

(Defoamer)
Examples of the defoaming agent include silicone-based compounds and ester-based compounds. These can be used alone or in combination of two or more.
The preferable blending amount of the defoaming agent is not particularly limited, but is, for example, in the range of 0.001% by mass or more and 5% by mass or less with respect to the total mass of the metalworking oil.

(Antibacterial agent)
Examples of the antibacterial agent include a benzotriazole-based antibacterial agent, a benzimidazole-based antibacterial agent, a benzothiazolin-based antibacterial agent, a thiadiazole-based antibacterial agent, a pyridine-based antibacterial agent, and the like. These can be used alone or in combination of two or more.
The preferable blending amount of the antibacterial agent is not particularly limited, but is, for example, in the range of 0.01% by mass or more and 1% by mass or less with respect to the total mass of the metalworking oil.

(Antioxidant)
Examples of the antioxidant include amine-based antioxidants such as alkylated diphenylamine, phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine, 2,6-di-t-butylphenol, and 4,4'-methylenebis (2,). 6-di-t-butylphenol), isooctyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, n-octadecyl-3- (3,5-di-t-butyl-4-) Examples thereof include phenolic antioxidants such as hydroxyphenyl) propionate, sulfur-based antioxidants such as dilauryl-3,3'-thiodipropionate, phosphorus-based antioxidants such as phosphite, and molybdenum-based antioxidants. .. One of these may be used alone, or two or more thereof may be mixed and used.
The blending amount of the antioxidant is not particularly limited, but is, for example, in the range of 0.01% by mass or more and 1% by mass or less with respect to the total mass of the metalworking oil.

(Metal inactivating agent)
Examples of the metal inactivating agent include benzotriazole, imidazoline, pyrimidine derivative, thiadiazole and the like. These can be used alone or in combination of two or more.
The blending amount of the metal inactivating agent is not particularly limited, but is, for example, in the range of 0.01% by mass or more and 3% by mass or less with respect to the total mass of the metalworking oil.

(Extreme pressure agent)
Examples of the extreme pressure agent include sulfur-based, phosphorus-based, and boron-based extreme pressure agents. Examples of the sulfur-based extreme pressure agent include sulfurized olefins, sulfurized fats and oils, sulfurized esters, thiocarbonates, dithiocarbamates, and polysulfides. Examples of the phosphorus-based extreme pressure agent include zinc dithiophosphate, phosphite, alkyl or aryl acid phosphate or an amine salt thereof, trialkyl or triaryl phosphate and the like. These can be used alone or in combination of two or more.
The blending amount of the extreme pressure agent is not particularly limited, but is, for example, 5% by mass or less with respect to the total mass of the metalworking oil.

(water)
The metalworking oil may be mixed with water to improve safety during storage. The water is not particularly limited, and high-purity water such as distilled water may be used, or tap water may be used.
The amount of water is preferably 0 to 20% by mass with respect to the total mass of the metalworking oil.

(Base oil)
The base oil may be a mineral oil or a synthetic oil generally used as a base oil for a water-soluble metalworking oil, and is not particularly limited.
As the mineral oil, for example, paraffin-based crude oil, intermediate-based crude oil or naphthenic-based crude oil is distilled at atmospheric pressure, or distillate oil obtained by distillation of residual oil of atmospheric pressure distillation under reduced pressure, or a distillate oil obtained by a conventional method. Therefore, refined oils obtained by refining, such as solvent refined oils, hydrogenated refined oils, dewaxing treated oils, and white clay treated oils, can be mentioned.
Examples of the synthetic oil include polyα-olefin, α-olefin copolymer, polybutene, alkylbenzene, polyol ester, dibasic acid ester, polyoxyalkylene glycol, polyoxyalkylene glycol ester, polyoxyalkylene glycol ether, and silicone oil. Can be mentioned. Among the synthetic oils, poly-α-olefins and α-olefin copolymers are suitable.
These base oils can be used alone or in combination of two or more, and may be used in combination with mineral oil and synthetic oil.
The content of the base oil in the metalworking oil is not particularly limited, but is, for example, 1 to 20% by mass with respect to the total mass of the metalworking oil.

The metalworking oil composition is produced by mixing the above dispersant and the metalworking oil. For example, a metalworking oil composition can be produced by adding a dispersant to a metalworking oil.
Alternatively, the metalworking oil composition may be produced by mixing the components constituting the dispersant and the components constituting the metalworking oil. The components may be mixed in any order and in any manner, and the method is not particularly limited.

3. 3. Metalworking Liquid One embodiment of the present invention relates to a metalworking liquid containing the dispersant of the above-mentioned form, a water-soluble metalworking oil, and diluted water. The specific embodiment of the dispersant is the same as that described in the above "1. Dispersant", and the specific embodiment of the "water-soluble metalworking oil" is described in the above "2. Metalworking oil composition". Similar to the one.
The diluted water is not particularly limited, and high-purity water such as distilled water may be used, or tap water may be used.

The dispersant, the water-soluble metalworking oil, and the diluted water may be mixed by any method, and the order of blending and the method thereof are not limited.

In some forms, the metalworking liquid is prepared by mixing a dispersant and a water-soluble metalworking oil to prepare a metalworking oil composition, and then adding diluted water to the composition. In this embodiment, the metalworking oil composition may be produced by mixing the components constituting the dispersant and the components constituting the metalworking oil.

In some forms, the metalworking solution is prepared by adding diluting water to the water-soluble metalworking oil to prepare a diluted solution of the metalworking oil, and then adding a dispersant to the diluted solution to obtain a metalworking solution. You may. In this embodiment, the diluted solution of the metalworking oil to which the dispersant is added may be before metalworking, during metalworking, or after metalworking.

The amount of diluted water is selected according to the purpose of use.
The metalworking liquid (diluting liquid) is preferably diluted so that the concentration of the water-soluble metalworking oil is preferably 3% by mass or more, more preferably 5% by mass or more. That is, the proportion of the water-soluble metalworking oil composition in the metalworking liquid of one embodiment is preferably 3% by mass or more, more preferably 5% by mass or more. Workability can be improved by setting the value to the lower limit or higher. On the other hand, the upper limit of the dilution concentration is not particularly limited, but it is desirable to dilute so that it is preferably 40% by mass or less, more preferably 30% by mass or less. That is, the proportion of the water-soluble metalworking oil composition in the metalworking liquid of one embodiment is preferably 40% by mass or less, more preferably 30% by mass or less. By setting the value to the upper limit or less, stickiness of the device after processing can be suppressed.

In the present invention, the water-soluble metalworking oil and the water-soluble metalworking oil composition are excellent in solubility in water, but even if the metalworking oil or the composition (undiluted solution) is used, the metalworking solution (diluted solution) However, it is not essential that all the ingredients are uniformly dissolved. Therefore, it may be in a dispersed form such as an emulsion.

4. Metalworking Method One embodiment of the present invention relates to a metalworking method. In some embodiments, the metalworking method comprises the step of processing a metal material using the water-soluble metalworking oil composition of the above-mentioned form or the metalworking liquid of the above-mentioned form. The specific embodiment of the "water-soluble metal processing oil" is the same as that described in the above "2. Metal processing oil composition", and the specific embodiment of the "metal processing liquid" is the above "3. Metal processing liquid". It is the same as that described in. Since the water-soluble metalworking oil composition or metalworking liquid of the above-mentioned form is excellent in dispersibility (particularly chip dispersibility), oil mud due to agglomeration of chips during metalworking by performing metalworking using these. The generation of insoluble matter can be suppressed.

In some embodiments, the metalworking method comprises the step of machining a metal material with a metalworking solution containing a water-soluble metalworking oil and diluting water, pre-, intra-step, and post-step. It is a method characterized by adding a dispersant to a metal processing liquid in at least one step.
The dispersant of the present embodiment can impart dispersibility (particularly chip dispersibility) to the metalworking liquid by adding it to the metalworking liquid after diluting the metalworking oil. Therefore, the dispersibility can be improved without changing the design of the metalworking oil itself, which has been indispensable in the past.

The type of metal processing is not particularly limited, and examples thereof include various metal processing such as grinding, cutting, punching, polishing, drawing, drawing, and rolling. Among these, cutting and grinding are preferable, and cutting is more preferable. Examples of the cutting process include turning process, planing process, drilling process, milling process and the like. Examples of the grinding process include cylindrical grinding process and surface grinding process.

The metal material is not particularly limited, and examples thereof include iron-based materials such as stainless steel, alloy steel and carbon steel, aluminum alloys and copper alloys.

From the viewpoint of dispersibility, the dispersant contains the amine compound I in an amount of preferably 0.005 part by mass or more (more preferably 0.025 part by mass or more, more preferably 0.025 part by mass) with respect to the total mass (100 parts by mass) of the metal processing liquid. It is preferably added in an amount of 0.05 parts by mass or more). In the dispersant, the amine compound I is preferably 0.75 parts by mass or less (more preferably 0.5 parts by mass or less, still more preferably 0.25 parts by mass) with respect to the total mass (100 parts by mass) of the metal processing liquid. It is added so that the amount is less than or equal to the portion). In the dispersant, the amine compound I is preferably 0.005 to 0.75 parts by mass, more preferably 0.025 to the total mass (100 parts by mass) of the metal processing liquid from the viewpoint of dispersibility and the like. Addition is made in an amount in the range of 0.5 parts by mass, more preferably 0.05 to 0.25 parts by mass.

From the viewpoint of dispersibility, the dispersant is preferably 0.1 part by mass with respect to the total mass (100 parts by mass) of the components of the water-soluble metalworking oil contained in the metalworking liquid excluding water. It is added in an amount of the above (more preferably 0.5 parts by mass or more, still more preferably 1 part by mass or more). In the dispersant, the amine compound I is preferably 16.5 parts by mass or less (more preferably 11) with respect to the total mass (100 parts by mass) of the components of the water-soluble metal processing oil contained in the metal processing liquid excluding water. It is added in an amount of 5 parts by mass or less, more preferably 5.5 parts by mass or less). From the viewpoint of dispersibility, the dispersant is preferably 0.1 part by mass with respect to the total mass (100 parts by mass) of the components of the water-soluble metal processing oil contained in the metal processing liquid excluding water. As described above, the amount is more preferably 0.1 to 16.5 parts by mass, further preferably 0.5 to 11 parts by mass, and particularly preferably 1 to 5.5 parts by mass.

5. Method for Improving Dispersibility One embodiment of the present invention relates to a method for improving dispersibility of a water-soluble metalworking oil composition or a metalworking liquid. The method of this embodiment includes a step of adding a dispersant to the water-soluble metal processing oil of the above-mentioned embodiment, a metal processing liquid before being used for metal processing, or a metal processing liquid after being used for metal processing. In one embodiment, the dispersibility is chip dispersibility.
Since the dispersant has excellent dispersibility (particularly chip dispersibility), it can be added to a water-soluble metal processing oil, a metal processing liquid before being used for metal processing, or a metal processing liquid after being used for metal processing. It is possible to suppress the agglomeration of chips generated during metal processing, thereby suppressing the generation of oily mud-like insoluble matter.

From the viewpoint of dispersibility, the dispersant contains Amine Compound I in an amount of preferably 0.1 part by mass or more (more preferably 0.) With respect to the total mass (100 parts by mass) of the components of the water-soluble metalworking oil excluding water. It is added in an amount of 5 parts by mass or more, more preferably 1 part by mass or more). As the dispersant, the amine compound I is preferably 16.5 parts by mass or less (more preferably 11 parts by mass or less, still more preferably 11 parts by mass) with respect to the total mass (100 parts by mass) of the components of the water-soluble metalworking oil agent excluding water. Is added in an amount of 5.5 parts by mass or less). In the dispersant, from the viewpoint of dispersibility, the amine compound I is preferably 0.1 part by mass or more, more preferably 0 part by mass, based on the total mass (100 parts by mass) of the components of the water-soluble metalworking oil agent excluding water. It is added in an amount in the range of 1 to 16.5 parts by mass, more preferably 0.5 to 11 parts by mass, and particularly preferably 1 to 5.5 parts by mass.

Hereinafter, the present invention will be described in detail with reference to Examples, but the technical scope of the present invention is not limited thereto. As used herein, "room temperature" usually refers to about 10 ° C to about 35 ° C. % Indicates mass percent unless otherwise specified.

Each physical property evaluation of each raw material used in Examples and Comparative Examples was carried out by the method shown below.
(1) 40 ° C. kinematic viscosity According to JIS K2283: 2000, the kinematic viscosity at 40 ° C. (40 ° C. kinematic viscosity) was measured using a glass capillary viscometer.
(2) HLB
Calculated by the Griffin method.

[Examples 1 to 10, Comparative Examples 1 to 4: Cutting oil composition]
A water-soluble cutting oil was used as the water-soluble metalworking oil, and a water-soluble metalworking oil composition (cutting oil composition) containing the water-soluble cutting oil and the dispersant was prepared. Specifically, the components and dispersants of the water-soluble cutting fluids shown in Table 1 below were mixed to prepare cutting oil compositions (stock solutions) of Examples and Comparative Examples, and the following evaluations were performed. In Table 1, the numerical values shown in parentheses for the dispersant are the dispersants (amine compounds A1 to A7, R1 to R3) with respect to the total mass (100 parts by mass) of the components of the water-soluble cutting oil excluding water. The content (part by mass) is shown.
The results are shown in Table 1.

[Evaluation 1]
(1) Graphite dispersibility Dilute each cutting oil composition (stock solution) 20-fold with ion-exchanged water to obtain a cutting fluid diluted solution (5% by mass diluted solution), add up to 100 mL, and graphite (Wako Pure Chemical Industries, Ltd.). Manufactured product, particle size (45 μm passage): 95% or more, dry remaining amount (105 ° C.) 0.4% or more)) 3 g was added. The obtained diluted solution of cutting fluid was shaken for 30 seconds, and the time until graphite aggregated after the shaking was stopped was measured and evaluated according to the following criteria. The test was carried out at room temperature.
(Evaluation criteria)
A: Graphite does not aggregate for 6 minutes or more B: Graphite does not aggregate for 2 minutes or more and less than 6 minutes C: Graphite does not aggregate for 30 seconds or more and less than 2 minutes D: Graphite does not aggregate in time of less than 30 seconds Aggregated

Graphite has a large surface area because it has a uniform particle size and a very small particle size, and is particularly liable to aggregate among the particles dispersed in the metal processing liquid. Therefore, it can be said that the dispersibility test using graphite is a test in the harshest environment using particles that easily aggregate. It can be said that the better the dispersibility of graphite, the better the dispersibility of particles such as chips (particles with a larger particle size), and it is possible to evaluate the dispersibility of chips from the above evaluation result of graphite dispersibility. be.

(2) Aluminum discoloration test The cutting oil composition (stock solution) was diluted 20-fold with water to obtain a cutting fluid diluted solution (5% by mass diluted solution), and the solution was increased to 100 mL. The test piece (aluminum alloy A6061 / ADC12) was immersed in the obtained diluted solution of cutting fluid at 30 ° C. for 24 hours and further at 60 ° C. for two and a half hours, and then the appearance of the test piece was observed and evaluated.
(Evaluation criteria)
A: No discoloration B: Discoloration

The components used in Table 1 above are as follows.
(Water-soluble cutting oil)
Fatty acid mixture: mixed fatty acid (acid value = 32.3 mgKOH / g, hydroxyl value = 1.1 mgKOH / g) of dodecanedioic acid, neodecanoic acid, tall oil fatty acid and ricinoleic acid polymerized fatty acid (steamed oil polymerized fatty acid)
Amine Mixtures: Mixtures of Amine 1, Amine 2, Amine 3, Amine 4, and Amine 5 below Amine 1: N-Methylethanolamine Amine 2: 2-Amino-2-methyl-1-propanol Amine 3: N-Methyldiethanolamine Amine 4: N-methyldicyclohexylamine Amine 5: N-methyldicyclohexylamine Nonionic surfactant: Polyoxyalkylene alkyl ether Aluminum discoloration inhibitor (anionic surfactant): Polyoxyethylene C ₁₂ -C ₁₅ alkyl ether Metal phosphate inactivating agent: Bentriazole emulsifying aid: Methyl oleate Base oil: Paraffinic mineral oil (40 ° C. kinematic viscosity: 7.117 mm ² / s)
BIT antibacterial agent: 1,2-benzoisothiazolin-3-onepyridine antibacterial agent: 2-mercaptopyridine-N-oxide sodium antifoaming agent: silicone antifoaming agent

(Dispersant)
The structures of the amine compounds A1 to A7 and the amine compounds R1 to R3 in Table 1 are shown in Table A below. The amine compounds A1 to A7 are the amine compounds I of the present invention, and the amine compounds R1 to R3 are comparative compounds.

From Table 1, the cutting fluid diluted solution obtained by diluting the cutting oil compositions of Examples 1 to 10 represented by the general formula (I) and containing the amine compound I having an HLB of 9 or more as a dispersant is In addition, discoloration of aluminum, which is excellent in dispersibility of graphite and is likely to occur due to the use of amine compound I, was not confirmed. Therefore, the metalworking oil composition represented by the general formula (I) and containing the amine compound I having an HLB of 9 or more as a dispersant and the metalworking liquid obtained by diluting the metalworking liquid with water are made of aluminum during metalworking. It is expected to have excellent dispersibility (particularly chip dispersibility) while preventing discoloration of aluminum.
On the other hand, Comparative Example 1 in which the amine compound I of the general formula (I) is not used and Comparative Examples 2 to 4 in which the amine compound I of the general formula (I) having an HLB of less than 9 is blended as a dispersant are shown. , The dispersibility of graphite was inferior.

これらの分散剤および切削油剤希釈液を用いて、以下の評価を行った。結果を表２に示す。 [Examples 11 to 17, Comparative Examples 5 to 9: Post-addition of dispersant]
As the water-soluble metalworking oil, a water-soluble cutting oil prepared by mixing each component of the water-soluble cutting oil of Comparative Example 1 shown in Table 1 above was used. This water-soluble cutting fluid was diluted 20-fold with ion-exchanged water to obtain a cutting fluid diluted solution (5% by mass diluted solution).
As the dispersant, amine compounds A1 to A7 and amine compounds R1 to R3 shown in Table A above, and amine compounds R4 to R5 which are diamine compounds shown in Table B below were used. Amine compounds A1 to A7 are amine compounds I of the present invention. The amine compounds R1 to R3 and the amine compounds R4 to R5 are comparative compounds.

The following evaluations were made using these dispersants and diluted solutions of cutting oil. The results are shown in Table 2.

[Evaluation 2]
(1) Graphite dispersity Dilute the cutting fluid to 100 mL, and add 3 g of graphite (manufactured by Wako Pure Chemical Industries, Ltd., particle size (45 μm passage): 95% or more, dry remaining amount (105 ° C) 0.4% or more). Added. The dispersant shown in Table 2 was added thereto, and the mixture was shaken for 30 seconds. The time required for graphite to aggregate after the shaking was stopped was measured and evaluated according to the following criteria. The test was carried out at room temperature.
(Evaluation criteria)
A: Graphite does not aggregate for 6 minutes or more B: Graphite does not aggregate for 2 minutes or more and less than 6 minutes C: Graphite does not aggregate for 30 seconds or more and less than 2 minutes D: Graphite does not aggregate in time of less than 30 seconds Aggregated

(2) Aluminum discoloration test The diluted solution of cutting oil was added to 100 mL, and then the dispersant shown in Table 2 was added. After immersing the test piece (aluminum alloy A6061 / ADC12) at 30 ° C. for 24 hours and further at 60 ° C. for two and a half hours, the appearance of the test piece was observed and evaluated.
(Evaluation criteria)
A: No discoloration B: Discoloration

From Table 2, Examples 11 to 17 in which the amine compound I represented by the general formula (I) and having an HLB of 9 or more is added as a dispersant are excellent in the dispersibility of graphite, and the amine compound I is used. As a result, discoloration of aluminum, which is likely to occur, was not confirmed. Therefore, the amine compound I represented by the general formula (I) and having an HLB of 9 or more is excellent while suppressing discoloration of aluminum by adding a small amount to the metal processing liquid at the time of metal processing. It is expected to exhibit dispersibility (particularly chip dispersibility).
On the other hand, Comparative Examples 1 in which the amine compound I of the general formula (I) was not used and Comparative Examples 5 to 7 in which the amine compound I of the general formula (I) having an HLB of less than 9 was post-added as a dispersant. Was inferior in dispersibility of graphite.
Further, Comparative Examples 8 to 9 in which the diamine alkylene oxide adducts (amine compounds R4 and R5) described in Patent Document 1 (Japanese Unexamined Patent Publication No. 11-80769) were post-added as a dispersant showed the dispersibility of graphite. It was inferior.

The scope of the present invention is not limited to the above description, and other than the above examples, the present invention may be appropriately modified and implemented as long as the gist of the present invention is not impaired. All documents and publications described herein are incorporated herein by reference in their entirety, regardless of their purpose.

Since the dispersant of the present invention can impart good dispersibility by adding it to a water-soluble metal processing oil or a metal processing liquid, it is suitably used for metal processing accompanied by generation of chips.

Claims (15)

A dispersant for a water-soluble metalworking oil, which is represented by the following general formula (I) and contains an amine compound I having an HLB of 9 or more.

[During the ceremony,
R ¹ represents a hydrocarbon group having 8 to 18 carbon atoms.
R ² , R ³ and R ⁴ independently represent a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms, respectively.
A ¹ and A ² independently represent a single bond or a polyoxyalkylene group, respectively.
A ³ represents a polyoxyalkylene group
L represents a hydrocarbon group having 1 to 8 carbon atoms.
p is an integer of 0 or 1. ] R ¹ is an alkyl group or an alkenyl group having 8 to 18 carbon atoms.
^{R2 ,} R3 and ^R4 are hydrogen atoms and
A ¹ and A ² are independent single bonds or polyoxyalkylene groups, respectively.
A ³ is a polyoxyalkylene group
L is an alkylene group having 1 to 8 carbon atoms.
The dispersant according to claim 1, wherein p is an integer of 0 or 1. The dispersant according to claim 1 or 2, wherein p is 0. The dispersant according to any one of claims 1 to 3, which is a chip dispersant. A water-soluble metalworking oil composition comprising the dispersant according to any one of claims 1 to 4 and a water-soluble metalworking oil agent. The water-soluble metalworking oil composition according to claim 5, wherein the amine compound I is contained in an amount of 0.1% by mass or more based on 100% by mass of the total mass of the water-soluble metalworking oil composition. The water-soluble according to claim 5 or 6, wherein the amine compound I is contained in an amount of 0.1 part by mass or more with respect to 100 parts by mass of the total mass of the components of the water-soluble metalworking oil excluding water. Metalworking oil composition. A metalworking liquid containing the dispersant according to any one of claims 1 to 4, a water-soluble metalworking oil, and diluted water. The dispersant according to any one of claims 1 to 4, the water-soluble metalworking oil composition according to any one of claims 5 to 7, or the water-soluble metalworking oil composition according to claim 8, which is used for cutting or grinding. The described metal processing liquid. A method for improving the dispersibility of water-soluble metalworking oils or metalworking liquids.
The step of adding the dispersant according to any one of claims 1 to 4 to a water-soluble metal processing oil, a metal processing liquid before being used for metal processing, or a metal processing liquid after being used for metal processing. Method. The dispersant is added so that the amount of the amine compound I is 0.1 part by mass or more with respect to 100 parts by mass of the total mass of the components of the water-soluble metalworking oil excluding water. The method according to claim 10. A metal processing method comprising a step of processing a metal material using the water-soluble metal processing oil composition according to any one of claims 4 to 8 or the metal processing liquid according to claim 9. It ’s a metal processing method.
Including the step of processing a metal material using a metal processing liquid containing a water-soluble metal processing oil and diluted water.
A method according to any one of claims 1 to 4, wherein the dispersant according to any one of claims 1 to 4 is added to the metal processing liquid at at least one step before, during, and after the processing. 13. The dispersant according to claim 13, wherein the dispersant is added so that the amount of the amine compound I is in the range of 0.005 to 0.75 parts by mass with respect to 100 parts by mass of the total mass of the metalworking liquid. the method of. The method according to claim 13 or 14, wherein the processing is cutting or grinding.