JP2016145293A - Water soluble metal processing oil composition and application method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water soluble metal processing oil composition capable of suppressing abrasion of tools and excellent in liquid stability.SOLUTION: The water soluble metal processing oil composition by blending (A) at least one or more kind of mineral oil, synthetic oil and oil and fat (B) at least one or more kind selected from a group consisting of unsaturated aliphatic acid having 12 or more carbon atoms and a polymer thereof, (C) a sulfur-based extreme pressure agent and (D) an amine compound with the blended amount of the (B) component of 5 mass% or more based on total amount of the composition and a ratio of the basic value of the (D) component to the acid value of the (B) component of more than 1.SELECTED DRAWING: None

Description

  The present invention relates to water-soluble metalworking oil compositions and methods of use thereof.

  There are oil (oil) and water (water) processing fluids used for plastic processing, cutting, grinding, etc., but water-based types that are excellent in cooling and infiltration and do not pose a fire hazard are often used. Yes. As a water-soluble composition used for such an aqueous type processing oil, for example, at least selected from microcapsules containing an antibacterial substance, mineral oil, synthetic lubricant, oiliness improver and extreme pressure agent There has been proposed a water-soluble metalworking lubricant composition comprising a lubricant component containing one or more kinds (Patent Document 1). Further, for example, an extreme pressure additive, a polymer cation compound, an alicyclic amine and / or an aromatic amine, a monocarboxylic acid and / or a dicarboxylic acid and a basic substance necessary for neutralizing and water-solubilizing the carboxylic acid, A water-soluble oil for metal processing containing polyoxyalkylene glycol and water has been proposed (Patent Document 2). In addition, for example, a water-soluble lubricant for metal processing proposed by blending a hydroxy fatty acid compound, a fatty acid having 8 to 20 carbon atoms, a basic compound, a linear olefin having 8 to 20 carbon atoms, and a nonionic surfactant is proposed. (Patent Document 3).

Japanese Patent Laid-Open No. 03-177498 JP-A-11-279581 JP 2009-242743 A

  In recent years, in the processing industry, in order to improve productivity, processing speed has been increased. However, tool wear tends to be a problem with conventional processing fluids in high-speed machining. Moreover, although the composition for aqueous | water-based types is normally diluted with water and used, there also exists a problem which a stock solution and water isolate | separate in that case.

  An object of this invention is to provide the water-soluble metalworking oil composition which can suppress abrasion of a tool, and is excellent in liquid stability, and its usage method.

  According to one aspect of the present invention, (A) at least one of mineral oil, synthetic oil, and oil and fat, (B) an unsaturated fatty acid having 12 or more carbon atoms, and a polymer thereof. At least one or more selected, (C) a sulfur-based extreme pressure agent, and (D) an amine compound are blended, and the blending amount of the component (B) is 5% by mass or more based on the total amount of the composition. A water-soluble metalworking oil composition is provided, wherein the ratio of the base number of the component (D) to the acid value of the component (B) is higher than 1.

  Moreover, according to one aspect of the present invention, the above-described water-soluble metalworking oil composition is diluted with water so that the concentration at the time of use is 3% by volume or more, and used for processing a work material. A method of using a water-soluble metalworking oil composition is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the abrasion of a tool can be suppressed and the water-soluble metalworking oil composition which is excellent in liquid stability, and its usage method can be provided.

Hereinafter, a water-soluble metalworking oil composition (hereinafter also referred to as “the present composition”) which is an embodiment of the present invention will be described in detail.
In the water-soluble metalworking oil composition of the present invention, the composition obtained by blending various components includes not only “a composition containing various components” but also “in place of at least one of the various components”. , “A composition containing a modified product in which the component is modified” and “a composition containing a reaction product obtained by reacting any two or more of various components”.

[Water-soluble metalworking oil composition]
This composition is a stock solution diluted with water and used for various types of metal processing, and comprises the following components (A), (B), (C), and (D).

[Component (A)]
The component (A) of the present composition is at least one of mineral oil, synthetic oil, and fat.
Examples of the mineral oil include an extraction oil obtained by atmospheric distillation of paraffinic crude oil, intermediate base crude oil, or naphthenic crude oil, extraction oil obtained by vacuum distillation of the residual oil of the atmospheric distillation, and these Refined oil obtained by purifying the extracted oil according to a conventional method (specifically, solvent refined oil, hydrogenated refined oil, dewaxed oil, and clay treated oil). Of the mineral oils, naphthenic mineral oils are preferred.
Synthetic oils include, for example, poly α-olefins, α-olefin copolymers, polybutenes, alkylbenzenes, polyoxyalkylene glycols, polyoxyalkylene glycol esters, polyoxyalkylene glycol ethers, silicone oils, polyol esters, monoesters, and α- Examples include olefins. Among synthetic oils, polyol esters and monoesters are preferable from the viewpoint of lubricity, and among these, polyol esters are more preferable.
Examples of the fats and oils include natural fats and oils (for example, beef tallow, pork fat, soybean oil, rapeseed oil, rice bran oil, castor oil, coconut oil, palm oil, and palm kernel oil) and hydrides of the natural fats and oils. The fats and oils may be synthetic fats and oils such as esters. Examples of the ester include esters obtained by reacting a carboxylic acid having a hydrocarbon group having 6 to 24 carbon atoms and a carboxyl group with an alcohol having 2 to 18 carbon atoms.
These may be used alone or in any combination of two or more.

Component (A) preferably has a kinematic viscosity at 40 ° C. of 2 mm ² / s or more, more preferably 5 mm ² / s or more, and more preferably 8 mm ² / s or more from the viewpoint of lubricity. preferable. In addition, the component (A) preferably has a kinematic viscosity at 40 ° C. of 80 mm ² / s or less and 70 mm ² / s or less from the viewpoints of handling of the stock solution and permeability between the work material and the tool. More preferably, it is more preferably 60 mm ² / s or less.
The kinematic viscosity is a value measured according to JIS K2283.

  (A) As a compounding quantity of a component, it is preferable that it is 5 mass% or more on a composition whole quantity basis, It is more preferable that it is 30 mass% or more and 90 mass% or less, It is 40 mass% or more and 80 mass% or less. More preferably. If the amount of component (A) is 5% by mass or more, the effect of suppressing tool wear is further improved.

[(B) component]
Component (B) in the present composition is at least one selected from the group consisting of unsaturated fatty acids and polymers thereof. If it is unsaturated fatty acid or its polymer, the lubricity of a composition will become favorable.
Here, the number of carbon atoms of the unsaturated fatty acid is 12 or more, preferably 14 or more, and more preferably 16 or more. If this carbon number is 12 or more, the liquid stability at the time of diluting this composition and the inhibitory effect of tool wear will improve.

Examples of such unsaturated fatty acids include dodecenoic acid, docosenoic acid, oleic acid, linoleic acid, tall oil fatty acid, ricinoleic acid, linolenic acid, undecylenic acid, elaidic acid, and erucic acid. These fatty acids are not limited to straight chain structures, but include all branched isomers.
These may be used alone or in any combination of two or more.

  From the viewpoint of reducing tool wear, the component (B) is preferably at least one selected from the group consisting of tall oil fatty acids and polymerized fatty acids thereof.

  (B) The compounding quantity of a component is 5 mass% or more on a composition whole quantity basis, It is preferable that they are 8 mass% or more and 60 mass% or less, and it is more preferable that they are 10 mass% or more and 50 mass% or less. If the compounding quantity of (B) component is 5 mass% or more, the liquid stability at the time of diluting this composition and the inhibitory effect of tool wear will improve.

[Component (C)]
(C) component in this composition is a sulfur type extreme pressure agent. Examples of sulfur-based extreme pressure agents include sulfurized fats and oils, sulfurized fatty acids, sulfurized esters, sulfurized olefins, dihydrocarbyl polysulfides, thiadiazole compounds, alkylthiocarbamoyl compounds, triazine compounds, thioterpene compounds, and dialkylthiodipropionate compounds. Can do.

The component (C) is preferably a polysulfide having a sulfur chain length of 2 or more, more preferably a sulfur chain length of 3 or more, and further preferably a sulfur chain length of 5 or more. If the sulfur chain length is 2 or more, the extreme pressure property becomes better, and the wear resistance of the tool is improved.
Examples of the polysulfide having a sulfur chain length of 2 or more include dimethyl-trisulfide, diethoxydisulfide, ethyl-hydrodisulfide, diacetyl-disulfide, and di-t-dodecyltrisulfide.

  The blending amount of the component (C) is preferably 1% by mass or more and 30% by mass or less, more preferably 2% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 15% by mass based on the total amount of the composition. More preferably, it is as follows. When the amount of component (C) is 1% by mass or more and 30% by mass or less, the effect of suppressing tool wear is improved.

[Component (D)]
(D) component in this composition is an amine compound. Examples of the amine compound include alkanolamine, alkylamine, alicyclic amine, and aromatic amine.
Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, triisopropanolamine, methyldiethanolamine, ethyldiethanolamine, butyldiethanolamine, cyclohexyldiethanolamine, phenyldiethanolamine, benzyldiethanolamine, oleyldiethanolamine, Lauryldiethanolamine, xylyldiethanolamine, dimethylethanolamine, diethylethanolamine, dibutylethanolamine, dioctylethanolamine, dioleylethanolamine, octyldipropanolamine, stearyl dipropanolamine, tolyldipropanolamine, dibutyl Ropanoruamin, dihexyl propanolamine, and dilauryl propanolamine and the like.
Examples of the alkylamine include methylamine, ethylamine, dimethylamine, diethylamine, methylethylamine, methylpropylamine, ethylenediamine, tetramethylenediamine, N-ethylethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine. Can be mentioned.
Examples of the alicyclic amine include 1,4-diaminocyclohexane, 4,4′-diaminodicyclohexylmethane, 4,4′-diamino-3,3′-dimethyldicyclohexylmethane, 4,4′-diamino-3, 3′-dimethyldicyclohexyl, N, N-dicyclohexylmethylamine and the like can be mentioned.
Examples of aromatic amines include benzylamine and dibenzylamine.
These amine compounds may be further substituted with one or more functional groups having a ring structure such as an alkyl group having 1 to 18 carbon atoms, a cyclohexyl group, and a phenyl group.
These may be used alone or in any combination of two or more.

  From the viewpoint of rot resistance, the component (D) is preferably at least one of N, N-dicyclohexylmethylamine, dicyclohexylamine, monoisopropanolamine, triisopropanolamine, and cyclohexyldiethanolamine.

The blending amount of component (D) is related to the blending amount of component (B), and the ratio of the base number of component (D) to the acid value of component (B) (base number of component (D) / (B ) The acid value) of the component is higher than 1, preferably 1.1 or higher, more preferably 1.2 or higher. If the base value of the component (D) / the acid value of the component (B) is higher than 1, the liquid stability when the composition is diluted with water is excellent. Moreover, it is excellent also in rot resistance.
In addition, an acid value is the value [mgKOH / g] measured by the potentiometric titration method based on JISK2501. The base number is a value [mg KOH / g] measured by the hydrochloric acid method according to JIS K2501.

[Other ingredients]
In the composition, other optional components (additives and the like) can be further blended as long as the effects of the present invention are not impaired.
Examples of other additives include nonionic surfactants, metal deactivators, rust inhibitors, antifoaming agents, and bactericides. These may be used alone or in any combination of two or more.
Examples of the nonionic surfactant include alkyl polyethylene glycol, polyethylene glycol stearate, and pentaerythritol stearate monoester. As a compounding quantity, about 0.1 to 10 mass% is preferable on the basis of the total amount of the composition.
Examples of the metal deactivator include benzotriazole, benzotriazole derivatives, imidazoline, pyrimidine derivatives, thiadiazole, and thiadiazole. As a compounding quantity, about 0.01 mass% or more and 10 mass% or less are preferable on the composition whole quantity basis.
Examples of the rust inhibitor include amine salts of dodecanedioic acid, amine salts of nonanoic acid, alkylbenzene sulfonate, dinonyl naphthalene sulfonate, alkenyl succinate, and polyhydric alcohol ester. As a compounding quantity, about 1 mass% or more and 30 mass% or less are preferable on the composition whole quantity basis.
Examples of the antifoaming agent include methyl silicone oil, fluorosilicone oil, and polyacrylate. As a compounding quantity, about 0.01 mass% or more and about 1 mass% or less are preferable on the composition whole quantity basis.
Examples of the bactericides include triazine preservatives, alkylbenzimidazole preservatives, paraoxybenzoic acid esters (parabens), benzoic acid, salicylic acid, sorbic acid, dehydroacetic acid, p-toluenesulfonic acid, and salts thereof. And phenoxyethanol and the like. The blending amount is preferably about 0.01% by mass or more and 5% by mass or less based on the total amount of the composition.

When preparing this composition (stock solution), you may mix | blend water further. By blending water, the composition may have an effect of improving the dispersion stability or liquid stability of the composition. There is no restriction | limiting in particular about the water used when preparing a stock solution, For example, deionized water (ion-exchange water), a pure water, a tap water, industrial water etc. can be used.
The dispersion stability or liquid stability of the composition varies depending on the contents of the components (A) to (D) in the composition and the blending ratio thereof. Therefore, water may not be required. Therefore, the blending amount of water for preparing the stock solution is preferably 0% by mass or more and 50% by mass or less, more preferably 0% by mass or more and 20% by mass or less, and more preferably 0% by mass or more, based on the total amount of the composition. More preferably, it is 10 mass% or less.

This composition uses the composition as a stock solution and is appropriately diluted with water so as to have an appropriate concentration according to the purpose of use, and includes punching, cutting, grinding, polishing, drawing, drawing, rolling, etc. It can be suitably used in various metal processing fields. Grinding includes cylindrical grinding, internal grinding, surface grinding, centerless grinding, tool grinding, honing, super-finishing, and special curved grinding (eg screw grinding, gear grinding, cam grinding) , Roll grinding).
The composition is particularly suitable for cutting or grinding.

The present composition is preferably diluted with water so that the concentration at the time of use is 3% by volume or more and used for processing a work material, more preferably 5% by volume or more, and further preferably 10% by volume. That's it. If the concentration at the time of dilution with water is 3% by volume or more, the effect of reducing tool wear can be sufficiently obtained, and the effect of extending the tool life can be sufficiently obtained.
However, in the present composition, it is not essential that all the blended components are uniformly dissolved, whether it is a stock solution or a diluted solution. Therefore, it may be a solution or a dispersion form such as an emulsion.
In addition, about the water used when diluting stock solution, deionized water (ion-exchange water), a pure water, a tap water, industrial water etc. can be used, for example.

  The composition may be used for processing a work material made of an iron-based material (for example, carbon steel, ductile iron, stainless steel, alloy steel, etc.) or a nickel-based alloy (for example, Inconel, Hastelloy, etc.). preferable. If the present composition having a high effect of suppressing tool wear is used for processing the work material, it can be processed using various tools.

  Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these descriptions. In addition, the property of the composition in each example was calculated | required with the following method.

(1) Kinematic viscosity According to JIS K2283, the kinematic viscosity at 40 ° C was measured.
(2) Acid value It measured based on JISK2501.
(3) Base number It measured based on JISK2501.
(4) Hydroxyl value: Measured according to JIS K0070.
(5) Saponification value It measured based on JISK2503.

<Evaluation of composition>
A composition for evaluation was prepared with the composition shown in Table 1.
Each composition was evaluated by the following method. The obtained results are shown in Table 1.
[Liquid stability evaluation method]
The stock solution was diluted with water (10% by volume) in a 100 mL graduated cylinder to make 100 mL. After standing for 24 hours, the sample was visually observed and evaluated as A when no oil was separated and floated and no insoluble matter was generated, and B was evaluated. In addition, since the composition of the comparative example 8 is water-insoluble, and the composition of the comparative example 9 consists only of water, the comparative example 8 and the comparative example 9 did not evaluate liquid stability.

[Evaluation method of tool wear]
After cutting the stock solution with water diluted (10% by volume) under the following conditions, the lateral flank wear width of the tool was measured with DIGITAL MICROSCOPE VHX-600 (manufactured by Keyence). Since Comparative Example 8 is insoluble in water, the evaluation was performed without dilution.
(6) Cutting conditions Processing machine: Yamazaki Mazak NC lathe QT-15N type Work material: FCD450 diameter 97mm
Cutting tool: CNMA120404 UC5115 (Mitsubishi Materials)
Holder: DCLNL2020K12 (Mitsubishi Materials)
Cutting speed: 250 m / min
Feed: 0.2mm / rev
Cutting depth: 1mm
Lubrication amount: 3.7L / h
Lubrication system: External lubrication system Processing distance: 4 km

[note]
* 1 Naphthenic mineral oil: Kinematic viscosity at 40 ° C 26mm ² / s
* 2 Polymerized fatty acid obtained by heat-dehydrating condensation of ricinoleic acid at 200 ° C under a nitrogen stream. Acid value: 52 mgKOH / g, Saponification value: 196 mgKOH / g, Hydroxyl value: 20 mgKOH / g
* 3 Emulgen 404 (Kao Chemical)

  From the results shown in Table 1, it was confirmed that the compositions of Examples 1 to 4 had a good tool wear suppression effect and good liquid stability. On the other hand, it was confirmed that the compositions of Comparative Examples 1, 2, 5, 6, 8, and 9 had severe tool wear. In the compositions of Comparative Examples 3, 4, and 7, the stock solution and water were separated, and the tool wear could not be evaluated.

Claims (9)

(A) At least one of mineral oil, synthetic oil, and oil and fat,
(B) at least one selected from the group consisting of unsaturated fatty acids having 12 or more carbon atoms and polymers thereof,
(C) a sulfur-based extreme pressure agent, and (D) an amine compound.
The blending amount of the component (B) is 5% by mass or more based on the total amount of the composition,
The ratio of the base number of the component (D) to the acid value of the component (B) is higher than 1. The water-soluble metalworking oil composition, wherein The water-soluble metalworking oil composition according to claim 1,
The water-soluble metalworking oil composition, wherein the ratio of the base number of the component (D) to the acid value of the component (B) is 1.1 or more. In the water-soluble metalworking oil composition according to claim 1 or 2,
The water-soluble metalworking oil composition, wherein the blending amount of the component (A) is 5% by mass or more based on the total amount of the composition. In the water-soluble metalworking oil composition according to any one of claims 1 to 3,
The water-soluble metalworking oil composition, wherein the component (B) is at least one selected from the group consisting of tall oil fatty acids and polymerized fatty acids thereof. In the water-soluble metalworking oil composition according to any one of claims 1 to 4,
The water-soluble metalworking oil composition, wherein the component (C) is a polysulfide having a sulfur chain length of 2 or more. In the water-soluble metalworking oil composition according to any one of claims 1 to 5,
The water-soluble metalworking oil composition, wherein the blending amount of the component (C) is 1% by mass or more and 30% by mass or less based on the total amount of the composition. In the water-soluble metalworking oil composition according to any one of claims 1 to 6,
A water-soluble metal working oil composition characterized by being for cutting or grinding. The water-soluble metalworking oil composition according to any one of claims 1 to 7 is diluted with water so that the concentration at the time of use is 3% by volume or more to process a work material. A method of using a water-soluble metalworking oil composition, characterized by being used. In the use method of the water-soluble metalworking oil composition according to claim 8,
The method for using a water-soluble metalworking oil composition, wherein the work material comprises an iron-based material or a nickel-based alloy.