JPH11279581A - Water-soluble oil for metal processing - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To be excellent in grinding and cutting properties, to easily separate other oils even if oil-soluble other oil leaks or mixes into the diluent,
To provide a water-soluble metalworking oil agent that does not deteriorate the working environment, does not generate waste liquid, saves resources and prevents global environmental pollution, and further contributes to improving productivity. SOLUTION: The water-soluble oil agent for metal working contains the following components. (a) extreme pressure additive 1 to 40% by weight (b) high molecular weight cationic compound 0.01 to 10〃 (c) alicyclic amine and / or aromatic amine 0.5 to 15〃 (d) monocarboxylic acid And / or a dicarboxylic acid and a basic substance necessary for neutralizing and solubilizing the carboxylic acid 2 to 70 (e) polyoxyalkylene glycol 1 to 30 (f) water balance

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-soluble oil for metal working which can be widely applied to plastic working such as cutting and grinding.

[0002]

2. Description of the Related Art Cutting fluids widely used in the field of metal cutting and grinding include mineral oil-based, water-insoluble cutting fluids that are not diluted with water, and mineral oils, surfactants, and organic amines. And water-soluble cutting fluids used after dilution with water (see JIS K2241 cutting fluid). However, due to the increase in machining conditions associated with the recent increase in productivity, in the cutting and grinding fields where water-insoluble oils have been applied, the problems of smoke, mist, and ignition have greatly increased, and the Water-soluble oils have come into widespread use in place of water-insoluble oils in cutting, such as turning, drilling, milling, etc., in which water-soluble oils have been used, and in many grinding fields. In order to maintain the cutting and grinding properties, such a water-soluble oil composition is of a type that can be diluted with water by adding a surfactant, organic amine, etc. to mineral oil which is the base oil of the water-insoluble oil agent. (Usually called emulsion type). Certainly, this oil solution (undiluted solution) was
When used by diluting it up to 50 times, the problems of smoke, mist, and ignition during machining which have conventionally been problems with water-insoluble oils have been solved. However, on the other hand, when this type of oil is used, the used diluent oil (emulsion) is liable to decay (deteriorating, causing a bad smell and worsening the surrounding working environment), and the performance of the diluent oil is quickly deteriorated. Therefore, the diluent must be changed frequently in a short period of time, which is a waste of resources and a cause of environmental pollution of the earth.

[0003] As countermeasures, oils (usually referred to as soluble types) containing no mineral oil (base oil of water-insoluble oils), and various types of polymeric polyalkylene glycol compounds having low spoilage as an alternative to mineral oils Containing oil (usually called synthetic type)
In addition, we developed fungicides and fungicides to prevent the decay of cutting oils (rots are caused by bacteria that propagate in diluent oils).
New water-soluble cutting oils (usually called biostatic or bacteriostatic types) developed by using these raw materials in a comprehensive combination have been widely commercially available in recent years (JP-A-51-149460, JP-B-58). No. -5960, Japanese Patent Publication No. 5-1316, Japanese Patent Publication No. 5-5387
No. 2, JP-B-6-31388, etc.).

[0004] When the above-mentioned water-soluble oil agent is a new liquid, its preservative performance is excellent. However, when used in actual machining, oil-soluble quenching oil and rust-preventive oil, as well as oil-soluble cutting oil used in pre-processing, adhere to the work material used for machining. The soluble oil is always mixed into the diluent (the mixed oil-soluble oil is generally called other oil (trump oil)). In addition, machine tools (lathes, milling machines, drilling machines, gear cutting machines, cylindrical grinders, surface grinders, etc.) that perform cutting and grinding processes use various oil-soluble lubrication to slide the machine tools accurately. Oil (hydraulic working oil, gear oil, sliding surface oil, etc.) is used, and it is inevitable that these leak or mix into the diluent oil of the water-soluble oil used. The oil agent that leaks and mixes in this way is also referred to as other oil as described above. The amount of the other oil leaked and mixed usually reaches 1 to 15% by weight in the diluted oil. Conventionally, in order to reduce the amount of other oil, an oil scraper, an oil catcher, or the like is attached to a coolant tank for the diluted oil to separate and collect the other oil in the diluted oil. In addition, when the operation of the machine is stopped for a long period of time, very unproductive measures such as collecting and separating other oil floating in a large amount in a coolant using a large-sized vacuum car have been taken.

[0005] However, even if the other oil in the diluent oil is recovered by an oil scraper, an oil catcher, a vacuum car, or the like, the other oil that has leaked or mixed into the diluent oil must be separated and floated more easily than in the diluent oil. It is difficult or impossible to separate and recover the mixed oil from the diluent. In addition, the mineral oils mentioned above (similar to other oil-soluble oils)
Various surfactants, organic amines, inorganic basic compounds, and high molecular weight polyoxyalkylenes have been incorporated in the composition of water-soluble oils for which various measures have been taken to maintain the properties of the oils. Compounds and the like are contained, and as a result of emulsifying the leaked and mixed other oil, there is a problem that separation of the other oil becomes difficult. Therefore, although a water-soluble oil agent that does not contain mineral oil and is hardly perishable has been developed, when it is actually used as a diluent oil agent, it is inevitable that other oils leak or mix in the diluent oil agent. As a result, the other oil is completely emulsified in the diluent, and the diluent usually rots due to the other oil, and the performance of the diluent decreases in a short period of time.

Therefore, as a result of diligent research, we have found that these problems can be solved by using a specific high-molecular cationic compound. Certainly, water-soluble metalworking fluids (cutting and grinding fluids) containing the above specific cationic polymer compounds for cutting and grinding in many actual machine shops.
When used, easily separates oil-soluble other oils leaking and mixing into the diluent oil, preventing rot of the diluent oil, deterioration of performance and deterioration of work environment due to mixing of other oil, and stable for a long time It was possible to reduce the number of times the waste liquid was discharged. However, the water-soluble oil agent for metal working containing the specific high molecular cationic compound is, for example, cutting of automobile parts,
In grinding, cutting such as turning, milling and drilling of steel such as an engine block (generally referred to as light to medium cutting) and cylindrical grinding of camshafts and crankshafts (generally referred to as medium grinding). ) Can provide satisfactory results, but the cutting and grinding performance is not always sufficient for heavy cutting such as gun drilling and reaming of steel, and heavy grinding such as grooved drilling tools. Was. In these processes, a water-insoluble oil having excellent cutting performance and grinding performance is generally used.

[0007]

Accordingly, an object of the present invention is to provide a heavy cutting (steel tapping, gun drilling, reaming, etc.) and a heavy grinding (steel cutting) using a water-insoluble oil agent. (Grooving, angular processing, etc.), and at the same time, even if oil-soluble other oil leaks or mixes into the diluent oil, these other oils are separated into the upper layer, and as a result, the oil agent performance is stable for a long time without deterioration An object of the present invention is to provide a metal working water-soluble oil agent which does not deteriorate the surrounding working environment, does not generate waste liquid, and sufficiently contributes to resource saving and prevention of global environmental pollution.

[0008]

DISCLOSURE OF THE INVENTION The present invention provides a water-soluble metal working oil containing the following components. (a) extreme pressure additive 1 to 40% by weight (b) high molecular weight cationic compound 0.01 to 10〃 (c) alicyclic amine and / or aromatic amine 0.5 to 15〃 (d) monocarboxylic acid And / or a dicarboxylic acid and a basic substance necessary for neutralizing and solubilizing the carboxylic acid 2 to 70 (e) polyoxyalkylene glycol 1 to 30 (f) water balance

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The extreme pressure additive used in the present invention preferably contains at least one compound selected from the group consisting of chlorinated compounds, synthetic sulfur compounds, phosphorus compounds and organometallic salt compounds. . As chlorinated compounds,
Chlorinated mineral oil, chlorinated fat, chlorinated fatty acid, or chlorinated fatty acid ester, as a synthetic sulfur compound, sulfurized mineral oil,
Sulfurized oils, sulfurized fatty acids, sulfurized fatty acid esters, alkyl polysulfides, or alkylphenyl polysulfides include, as phosphorus compounds, alkyl phosphites, alkyl allyl phosphites, acidic alkyl phosphates, or acidic alkyl allyl phosphates However, as organometallic salts,
Zinc molybdate, alkaline earth metal molybdate,
Zinc phosphate or alkaline earth metal phosphate may be mentioned.

Representative examples of extreme pressure additives used in the present invention include the following compounds (1) to (12). (1) Chlorinated compounds obtained by reacting 10 to 50% by weight of chlorine with paraffin or α-olefin having 12 to 200 carbon atoms (chlorinated paraffins and the like) (2) Natural animal and vegetable fats and oils (lard, whale oil, rapeseed oil, rice bran oil) Chlorinated compounds (chlorinated lard, chlorinated rapeseed oil, etc.) obtained by reacting 10 to 50% by weight of chlorine with olive oil (3) Mono- or dicarboxylic acids having 12 to 60 carbon atoms and containing at least one double bond Acids (including polycondensed carboxylic acids)
Chlorinated compounds (e.g., methyl trichlorostearate, ethyl pentachlorostearate, etc.) obtained by reacting 10 to 50% by weight of chlorine with a compound obtained by esterifying the compound with an alcohol having 1 to 30 carbon atoms (4) having 12 to 60 carbon atoms A chlorine compound (trichlorostearin containing 10 to 50% by weight of a compound obtained by esterifying a mono- or dicarboxylic acid with an alcohol to a mono- or di-carboxylic acid containing at least one double bond in a polycondensed carboxylic acid). acid methyl ester, pentachlorophenol stearic acid ethyl ester, etc.) (5) sulfur 0 to 40 ° C. mineral oil viscosity 1.0~500mm ² / S of.
Sulfur compound (sulfurized mineral oil) dissolved by adding 1 to 3.0% by weight (6) Sulfur is added to α-olefin having 12 to 200 carbon atoms.
Sulfur compounds reacted with 50% by weight (sulfurized olefins) (7) Sulfur compounds obtained by reacting natural animal and vegetable fats and oils with 1 to 30% by weight (sulfurized lard, sulfided rice bran oil, etc.) (8) 12 to 60 carbon atoms Containing one or more double bonds,
Mono- or dicarboxylic acids (oleic acid, ricinoleic acid, polycondensation carboxylic acid) Sulfur sulfur compounds reacted 1-30% by weight (such as sulfurized oleic acid) (9) R ⁵ - Table with (Sx) -R Wherein R ⁵ is a C ₃ -C ₂₀ linear or branched alkyl group or a C ₇ -C ₂₄ alkylaryl group, and x is 1-6.
Indicates an integer. (10) Phosphate compound represented by formula (R ⁶ O) (R ⁷ O) (R ⁸ O) PO (trilauryl phosphate, acidic dilauryl phosphate, etc.) wherein R ⁶ , R ⁷ and R ⁸ may be the same or different and represents a hydrogen atom, a C _{3 to} C ₂₀ linear or branched alkyl group or a C _{7 to} C ₂₄ alkylaryl group. (11) a phosphite compound represented by the formula (R ⁹ O) (R ¹⁰ O) (R ¹¹ O) ₃ P (trilauryl phosphate, acidic dilauryl phosphate, etc.) wherein R ⁹ , R ¹⁰ and R ¹¹ may be the same or different and represent a hydrogen atom, a C ₃ -C ₂₀ linear or branched alkyl group or a C ₇ -C ₂₄ alkylaryl group. (12) Molybdenum (Mo), zinc (Zn), antimony (S
b) Organic metal salt compounds containing heavy metals such as calcium (Ca) and barium (Ba) (zinc dialkyldithiophosphate, molybdenum dialkyldithiocarbamate, etc.)

The amount of the extreme pressure additive used is suitably in the range of 1 to 40% by weight, preferably 3 to 30% by weight, in the oil agent (stock solution) of the present invention. When the extreme pressure additive is less than 1% by weight, there is no effect on the improvement of cutting performance and grinding performance.
When the content is 40% by weight or more, the effect of increasing the amount is not exhibited, the cost is increased, and the stock solution shows a viscosity increase. Further, adverse effects such as separation of the undiluted solution may occur.

The cationic polymer compound (component (a)) used in the present invention is preferably a compound represented by the following formula (1). (1)-[CH ₂ C (CH ₃ ) COOR ¹ ] a- [CH ₂ CHCOOR ² ] b- [CH ₂ C (C
H ₃ ) COOR ³ ] c- wherein R ¹ and R ² represent hydrogen or an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 14 carbon atoms, or an alkylaryl group having 7 to 18 carbon atoms; ³ represents CH ₂ CH ₂ N ⁺ (CH ₃ ) ₃ Cl, a, b, and c represent integers, and a: b: c is 1: 0.0
5: 0.001-1: 10: 1. The molecular weight of the high molecular weight cationic compound is preferably from 5,000 to 800,000, more preferably from 30,000 to 500,000.
It is. If the molecular weight is less than 5,000, the effect of separating other oil leaking and mixing into the diluent oil decreases, and the molecular weight is 8
If it exceeds 000, the effect of separation of other oils will not increase further, the solubility of the compound in water will decrease, and the viscosity of the oil agent (stock solution) will increase significantly. The amount of the above-mentioned high-molecular cationic compound is determined according to the oil agent (stock solution) of the present invention.
Of these, the range of 0.01 to 15% by weight is appropriate, and preferably 0.1 to 5% by weight. 0.01% by weight of the same compound
If it is less than 15%, the effect of separating other oils is inferior, and if it exceeds 15% by weight, the effect of increasing the amount is not exhibited and the cost becomes high, and the oil agent (stock solution) shows a very thick viscosity, which causes a problem in handling.

The alicyclic amine and / or aromatic amine component (c) used in the present invention includes alicyclic amines such as cyclohexylamine, dicyclohexylamine and 1,3-bismethylaminocyclohexane, aniline, o-amine and the like. And aromatic amines such as alkylaniline and m-xylenediamine. These amines are auxiliaries for improving the oil separation effect of the above-mentioned high molecular cationic compounds and other oils. By using these amine compounds in combination with the high molecular cationic compounds, other oils leaked and mixed into the diluent oil agent Can be significantly improved. The amount of the alicyclic and / or aromatic amine used in the oil agent of the present invention (stock solution)
0.5 to 15% by weight is appropriate, and if it is less than 0.5% by weight,
When used in combination with a high molecular weight cationic compound, other oil separation effects may not be sufficiently exhibited, and even when the amount exceeds 15% by weight, the effect of other oil separation is saturated, and the cost becomes extremely high. Further, the solubility in water is reduced. Therefore, the content is preferably 1.0 to 10.0% by weight.
The weight ratio of the amine compound to the high molecular weight cationic compound is preferably in the range of 1: 3 to 1:50.

The monocarboxylic acid used in the present invention and / or
Alternatively, the dicarboxylic acid (component (d)) may have 6 to 60 carbon atoms.
Preferred are aliphatic monocarboxylic acids, aliphatic dicarboxylic acids, aromatic monocarboxylic acids, and aromatic dicarboxylic acids. Examples of the basic substance include alkanolamines, aliphatic amines, ethylene oxide adducts of amines, and alkali metals. Hydroxides are preferred. Specific examples of the monocarboxylic acid and / or dicarboxylic acid having 6 to 60 carbon atoms include:
It is extracted from caproic acid, caprylic acid, nonanoic acid, lauric acid, stearic acid, oleic acid, ricinoleic acid, 12-hydroxy fatty acid, arachiic acid, behenic acid, melissic acid, isononanoic acid, neodecanoic acid, isostearic acid, and even fats and oils. Soybean fatty acid, coconut fatty acid, rapeseed oil fatty acid, naphthenic acid extracted from petroleum, etc .; adipic acid, sebacic acid, dodecane diacid, mono- or dihydroxyarachinic acid; and oleic acid, ricinoleic acid, ricinoleic acid, 12-hydroxy Synthetic fatty acids such as dimers and trimers such as fatty acids are exemplified. The use amount of these carboxylic acids is suitably 1 to 30% by weight in the oil agent (stock solution) of the present invention.

The composition of the present invention further contains a basic substance necessary for neutralizing and rendering the carboxylic acid water-soluble. Examples of such basic substances include organic basic compounds such as alkanolamines, aliphatic amines, ethylene oxide adducts of amines (for example, 1 to 5 moles of ethylene oxide added to amines), or alkali metal hydroxides. And inorganic basic compounds such as organic compounds. These basic substances improve the cutting property, the grinding property, the rust prevention property, and the like. The use amount of these basic substances is suitably from 1 to 40% by weight in the oil agent (stock solution) of the present invention. Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine,
N, N-dimethylethanolamine, N, N-diethylethanolamine, N-aminoethylethanolamine, N-methylethanolamine, N-methyl-diethanolamine, and the like, and aliphatic amines having 8 to 18 carbon atoms Primary and secondary alkylamines (e.g., 2-ethylhexylamine, laurylamine, stearylamine, oleylamine, etc.); synthetic amines obtained by adding 1 to 5 moles of ethylene oxide to these amines; and isodecylamines , Isostearylamine and the like. As the inorganic basic compound, periodic table 1A
Hydroxides of alkali metals of the group III (lithium hydroxide, sodium hydroxide, potassium hydroxide). The use amount of these basic substances may be any amount as long as it is necessary to neutralize the above mono- and / or dicarboxylic acids. If the amount of the basic substance used is smaller than the amount of neutralization of the carboxylic acid, the carboxylic acid will not be sufficiently soluble in water. The total amount of the carboxylic acid used and the basic substance used is preferably 2 to 70% by weight, more preferably 5 to 50% by weight in the stock solution. If it is less than 2% by weight, its characteristic effects may not be fully exhibited. As a result, the oil separation property of the oil agent is reduced.

The preferred polyoxyalkylene glycol used in the oil agent of the present invention is represented by the following formula (2)
To (5). (2) H- (EO) k- (PO) 1- (EO) m-OH (3) H- (PO) p- (EO) q- (PO) r-OH (4) H- (EO / PO) t-(PO) u-(EO / PO) v-
OH (5) R ⁴ O (PO) w (EO) x H wherein R ⁴ is an alkyl group having 1 to 6 carbon atoms, and PO is -CH
₂ -CH (CH ₃₎ -O- group, EO is -CH ₂ -CH ₂
Represents an -O- group, k, l, m, p, q, r, t, u, v, w, and
x is an integer of 3 to 500, and EO and P in (EO / PO)
The ratio of O is 5:95 to 95: 5 (weight ratio), and the molecular weights of the compounds represented by the formulas (2) to (5) are 1 respectively.
000 to 30,000. By adding these compounds, the cutting properties and grinding properties of the oil agent can be further improved. However, since these compounds emulsify leaked and mixed other oils and adversely affect the separation of oils from other oils, the amount of these compounds used is the oil of the present invention (undiluted solution)
The content is preferably 1 to 30% by weight, more preferably 3 to 20% by weight. If it is less than 1% by weight, it does not contribute to the improvement of the cutting property and grindability of the oil, and if it exceeds 30% by weight, the oil separation property of the oil decreases, and the improvement of the cutting and grinding properties is saturated, This results in increased oiling costs.

The oil agent (stock solution) of the present invention is water (distilled water, deionized water, tap water, industrial water, etc.), for example, 10 times to 2 times.
Diluted by a factor of 00, cutting and grinding as diluent oil,
It is generally used for metal working such as pressing, rolling, and forging.

[0018]

EXAMPLES Hereinafter, the water-soluble oil agent of the present invention will be described in more detail with reference to Examples in Table 1 and Comparative Examples in Table 2. In addition, oil leakage, mixing, other oil separation test, cutability test, and grindability test were performed by using the undiluted solution described in Tables 1 and 2 in tap water in the same manner as when using it at the actual machining site of a factory. 3
The test was performed on the oil solution diluted to 0 times.

(A) Stock solution judgment test The stock solution was placed in a 200 ml stoppered glass container, and the state of separation after 24 hours was observed. Judgment ○: No change ×: Two-layer separation (b) Leakage / mixing / other oil separation test 80 ml of 30-fold diluted oil and lubricating oil for machine tools (lubricating oil for sliding surface and gear oil: Bakutra N made by Mobil Sekiyu)
o.2) 20 ml was collected in a 720 household appliance mixer (manufactured by Toshiba), operated at 9000 rpm for 1 minute, and then the lubricating oil-mixed diluent was immediately transferred to a 100 ml graduated cylinder and kept at room temperature (25 ° C. ± 3 ° C.). For 24 hours, and the separated state of the lubricating oil was visually observed. Judgment ：: The lubricating oil is almost completely separated into the upper layer in 30 minutes (the lubricating oil-diluent oil is completely separated). ×: After 8 hours, the lubricating oil is separated into only the upper layer of about 10 to 50% of the mixed amount, and the diluent oil in the lower layer emulsifies the lubricating oil, so that its appearance is cloudy (emulsified). .

(C) Machinability test 30 L of 30-fold diluted oil was placed in the coolant tank of the machining center, and a cutting test (high speed steel tap test) was performed under the following cutting conditions, and the cutting torque (tap torque, thrust torque) was measured. The quality of the oil agent is determined based on how many tap holes are opened until the cutting torque is increased by 50% from the initial cutting torque. Judgment ◎: 15 holes or more ○: 10 to 14 holes □: 7 to 9 holes △: 6 holes or less (Cutting specifications) Machine tool: Mori Seiki machining center Machining method: Tapping Tool: High speed steel (45C 300 × Prepared hole: 9.2mm reamer finish (blind hole) Measurement item: Number of cuts until cutting torque is increased by 50% from the first cutting (d) Grindability test 30L diluted oil 50L We put it in the coolant tank of the grinder and performed a grinding experiment under the following grinding conditions.
Find out how many materials can be ground when dressing multiple times. The power value when the power consumption of the grinding machine is 30% higher than the power consumption value of the motor of the grinding machine when the first material is ground is defined as the life of the grinding wheel, and the quality of the oil agent is determined based on the number of processed materials to be ground up to that time. However, the power consumption value is obtained by subtracting the value when the motor is not loaded. Judgment ◎: 80 or more ○: 70 to 79 □: 60 to 69 △: 59 or less (Grinding specifications) Machine tool: Toyoda Koki cylindrical grinding machine Gup-32 Grinding wheel: WA80N (450 mmφ) Work material : Chromium molybdenum steel (50mmφ × 10mm width) Grinding condition: Wheel speed: 2700m / min Depth of cut: 2mm / min Removal allowance: 1mm Measurement item: Grinding machine motor power (kw) Coolant tank: 60L

[0021]

[Table 1] { Example 1} 2 3 4 5 6 7 component (a): chlorinated paraffin (Cl: 50% by weight) 5----51 Pentachlorostearic acid-5-----(Cl: 36% by weight) Lard sulfide (S: 10% by weight) − − 5 − − 51 1 Sulfurized olefin (S: 40% by weight) − − − 5 − − − Acidic dilauryl phosphite − − − − 31 1 (P: 7% by weight) Component (b): polymer Cationic compound 1 1 1 1 1 1 1 Component (c): Metaxylenediamine 5 5 5 5 5 5 5 Component (d): Oleic acid 10 10 10 10 10 15 10 Diethanolamine 20 20 20 20 20 25 20 Component (e) : Polyoxyethylene polyoxy 10 10 10 10 10 5 5 Propylene copolymer component (f): Water Residue Residue Residue Residue Residual properties (30-fold diluted solution) Stock solution (appearance) ○ ○ ○ ○ ○ ○ ○ Other oils Separability ○ ○ ○ ○ ○ ○ Cutting property ○ ○ ○ ○ ○ ◎ □ grindability ○ - ○ - - ◎ □

[0022]

[Table 2] Comparative Example 1 2 3 4 5 6 Ingredient (a): chlorinated paraffin (Cl: 50% by weight) 45-5---Pentachlorostearic acid---5--(Cl: 36% by weight) Lard sulfide (S: 10% by weight)-0.5- −3 − Sulfurized olefin (S: 40% by weight) − − − − − − Acidic dilauryl phosphite − − − − − − (P: 7% by weight) Component (b): High molecular weight cationic compound 11 1 − − 1 1 component (c): meta-xylene diamine 5 5 5 −5 5 component (d): oleic acid 10 10 10 − −10 diethanolamine 20 20 20 20 −20 component (e): polyoxyethylene polyoxypro 10 10 10 10 10 10 Pyrene copolymer component (f): Water Residue Residue Residue Residual properties (30-fold diluted solution) Stock solution (appearance) × ○ ○ × × ○ Separation of other oils-○ ×---Machinability-△ ○ − − △ Grindability − △ ○ − − △

In Tables 1 and 2, component (b): the molecular weight of the cationic polymer compound is 300,000, and component (e): the polyoxyethylene-polyoxypropylene copolymer is represented by the formula (2). And its molecular weight is 2000. In addition, "-" in the column of evaluation of other oil separability, machinability, and grindability indicates that the test was not performed or could not be performed. As can be seen from the examples in Table 1 and the comparative examples in Table 2, the water-soluble oil agents of Examples 1 to 7 of the present invention containing an extreme pressure additive are excellent in cutting performance and grinding performance, and are also diluted oil agents. The oil composition of the comparative example containing no extreme pressure additive or the like is inferior in cutting performance and grinding performance, while being excellent in the separability of other oil leaking and mixing therein.

Next, an example in which an actual machine test was conducted at a factory for the oil agent of Example 6 of the present invention and a commercially available water-insoluble oil agent (JIS K2241, Type 2 No. 3) will be described. (Example of on-site actual machine test) Machining parts: automotive parts (differential gear) Machining method: tapping Machine tool: dedicated machine Cutting oil: water-soluble oil of Example 6 Commercially water-insoluble oil (2/3 type) Dilution magnification : 30 times Coolant tank: 1000 L Result: The number of processed water-soluble oil agents of Example 6: 50-6
0 was equivalent to the water-insoluble oil agent. And unlike the water-insoluble oil agent, it was possible to contribute to the improvement of the working environment of the worker without fear of generation of mist and ignition.

[0025]

The water-soluble metalworking oil of the present invention has the same cutting performance and grinding performance as water-insoluble oils, and also has excellent separability of leakage and other oils, and long-term performance. Does not deteriorate.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C10M 145/10 C10M 145/10 145/34 145/34 159/04 159/04 // C10N 30:00 40:22 (72) Inventor Eiji Niwa 1-4-1, Tsujido Jindai, Fujisawa City, Kanagawa Prefecture In-house Kyodo Yushi Co., Ltd. (72) Inventor Yukie Hattori 1-4-1, Tsujido Shindai, Fujisawa City, Kanagawa Prefecture, In-Kyodo Yushi Corporation (72) Inventor Hiroshi Kobayashi Noritake Co., Ltd., 3-1-136, Noritake Shinmachi, Nishi-ku, Nagoya, Aichi Prefecture (72) Inventor Makoto Sato 3-36, Noritake Shinmachi, Nishi-ku, Nishi-ku, Nagoya, Aichi Prefecture Noritake Co., Ltd.

Claims (7)

[Claims] 1. A water-soluble oil for metalworking comprising the following components: (a) extreme pressure additive 1 to 40% by weight (b) high molecular weight cationic compound 0.01 to 10〃 (c) alicyclic amine and / or aromatic amine 0.5 to 15〃 (d) monocarboxylic acid And / or a dicarboxylic acid and a basic substance necessary for neutralizing and solubilizing the carboxylic acid 2 to 70 (e) polyoxyalkylene glycol 1 to 30 (f) water balance 2. The water-soluble oil agent for metal working according to claim 1, wherein the extreme pressure additive contains at least one compound selected from the group consisting of chlorinated compounds, synthetic sulfur compounds, phosphorus compounds and organic metal salt compounds. 3. The chlorinated compound is a chlorinated mineral oil, a chlorinated fat, a chlorinated fatty acid, or a chlorinated fatty acid ester,
Synthetic sulfur compounds, sulfurized mineral oil, sulfurized fats, sulfurized fatty acids,
A sulfurized fatty acid ester, an alkyl polysulfide, or an alkylphenyl polysulfide, wherein the phosphorus compound is an alkyl phosphite, an alkyl allyl phosphite,
3. An acidic alkyl phosphate or an acidic alkyl allyl phosphate, wherein the organic metal salt is zinc molybdate, an alkaline earth metal molybdate, zinc phosphate, or an alkaline earth metal phosphate. The water-soluble oil agent for metal working according to the above. 4. The water-soluble oil agent for metal working according to claim 1, wherein the high molecular weight cationic compound is a compound represented by the following formula (1). (1)-[CH ₂ C (CH ₃ ) COOR ¹ ] a- [CH ₂ CHCOOR ² ] b- [CH ₂ C (C
H ₃ ) COOR ³ ] c- (wherein, R ¹ and R ² represent hydrogen or an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 14 carbon atoms, or an alkylaryl group having 7 to 18 carbon atoms; R ³ represents CH ₂ CH ₂ N ⁺ (CH ₃ ) ₃ Cl, a, b and c represent integers, and a: b: c is 1: 0.0
5: 0.001-1: 10: 1, molecular weight 5,000
~ 800,000. ) 5. The alicyclic amine and / or aromatic amine is cyclohexylamine, dicyclohexylamine,
1,3-bismethylaminocyclohexane, aniline,
The water-soluble oil agent for metal working according to any one of claims 1 to 4, wherein the water-soluble oil agent is o-alkylaniline or m-xylenediamine. 6. The basic substance wherein the monocarboxylic acid and / or dicarboxylic acid is an aliphatic monocarboxylic acid, aliphatic dicarboxylic acid, aromatic monocarboxylic acid or aromatic dicarboxylic acid having 6 to 60 carbon atoms. Is an alkanolamine,
The water-soluble oil agent for metal working according to any one of claims 1 to 5, which is an aliphatic amine, an ethylene oxide adduct of an amine, or an alkali metal hydroxide. 7. The polyoxyalkylene glycol is a compound represented by the following formulas (2) to (5).
The water-soluble oil agent for metalworking according to any one of claims 6 to 10. (2) H- (EO) k- (PO) 1- (EO) m-OH (3) H- (PO) p- (EO) q- (PO) r-OH (4) H- (EO / PO) t-(PO) u-(EO / PO) v-
OH (5) in ^{R 4 O (PO) w (} EO) x H ( wherein, R ⁴ is an alkyl group having 1 to 6 carbon atoms, PO represents -C
H ₂ —CH (CH ₃ ) —O— group, EO is —CH ₂ —CH
Represents a _2- O- group, and k, l, m, p, q, r, t, u, v, w, and x are integers of 3 to 500, and represents the number of EO and PO in (EO / PO). The ratio is from 5:95 to 95: 5 (weight ratio),
The molecular weights of the compounds represented by the formulas (2) to (5) are each 1,000 to 30,000. )