JP2003253290A - Water-based lubricating oil composition for plastically working non-ferrous metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-based lubricating oil composition for plastically working non-ferrous metal, having excellent lubricity and workability, and capable of preventing deterioration of working environment and working efficiency, and occurrence of separation/sedimentation of lubricating oil components with time. <P>SOLUTION: This water-based lubricating oil composition for plastically working the non-ferrous metal contains water, a surfactant, and an alkyl- modified silicone oil and/or an alkyl aralkyl-modified silicone oil, wherein the lubricating oil components including the alkyl-modified silicone oil and/or the alkyl aralkyl-modified silicone oil are emulsified, dispersed or solubilized into the water by the surfactant. The modified silicone oils are preferably contained in amounts of ≥30 wt.% in total based on the whole amount of the lubricating oil components. The modified silicone oils preferably have each a viscosity of ≥200 mm<SP>2</SP>/s at 25°C. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a lubricating oil composition used for plastic working such as forging, extrusion, pressing and wire drawing of a non-ferrous metal material, and more specifically, for forming a plate of a non-ferrous metal material. The present invention relates to a water-based lubricating oil composition for non-ferrous metal plastic working.

[0002]

2. Description of the Related Art Conventionally, when plate-forming (for example, pressing, ironing, deep drawing, etc.) of ferrous metal materials or non-ferrous metal materials, friction between the materials and tools or dies is reduced. However, the lubricant is used for the purpose of more smoothly plastically deforming the material and cooling and protecting the tool or the mold. Among them, in the processing of non-ferrous metal materials, in consideration of reactivity with materials, corrosiveness, etc., a lubricant of a type in which a solid lubricating component such as graphite powder or molybdenum disulfide powder is dispersed in oil or water is lubricated. It is widely used because of its excellent workability and workability. However, the lubricant containing the graphite powder or the molybdenum disulfide powder has a black appearance, and has a drawback that the powder is scattered during processing and adheres to a machine to deteriorate the working environment. Also, with repeated use, graphite powder or molybdenum disulfide powder clogs the lubricant supply pipe or nozzle,
There is also a problem that work is hindered and extra work is required to clean these, which significantly deteriorates work efficiency. Further, when left for a long period of time, the powder components are separated and settled with the passage of time, and the performance is significantly deteriorated. Therefore, in order to solve the problems of these powder-dispersed lubricants, lubricants that do not contain powder components such as graphite powder and molybdenum disulfide powder have been demanded. Furthermore,
If a water-insoluble lubricant is used, there are problems such as mist generation, ignition, and smoke generation, and the cleaning process for removing the lubricant component adhering to the work and the machine becomes complicated. Especially, water-based lubricants have been demanded.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above point of view, and in the plastic working of materials for nonferrous metals, particularly magnesium, magnesium alloys, aluminum and aluminum alloys, graphite or nickel is used. Non-ferrous that has excellent lubricity and workability equal to or better than lubricants including solid lubricants such as molybdenum sulfide, and that does not cause deterioration of work environment or work efficiency and separation or precipitation of lubricating oil components over time. An object is to provide a water-based lubricating oil composition for metal plastic working.

[0004]

The non-ferrous metal plastic working water-based lubricating oil composition of the present invention contains water, a surfactant, and an alkyl-modified silicone oil and / or an alkylaralkyl-modified silicone oil, It is characterized in that an alkyl-modified silicone oil and / or a lubricating oil component containing the alkyl-aralkyl-modified silicone oil is emulsified, dispersed or solubilized in water by the surfactant. Both the alkyl-modified silicone oil and the alkylaralkyl-modified silicone oil may have a viscosity at 25 ° C. of 200 mm ² / s or more. The total content of the alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil contained in the non-ferrous metal plastic working water-based lubricating oil composition of the present invention is 30% by weight or more based on the entire composition. Can be The lubricating oil component may further contain mineral oil. The non-ferrous metal plastic working water-based lubricating oil composition of the present invention may further contain a wax emulsion and / or a wax suspension. The non-ferrous metal plastic working water-based lubricating oil composition of the present invention can be used for processing a non-ferrous metal material selected from magnesium, magnesium alloys, aluminum and aluminum alloys.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail. Up
The alkyl-modified silicone oil is usually used as a lubricant and release agent.
If it is used as a mold agent, hydraulic oil, etc.,
Not determined. The commonly known "silicone oil"
Is a dimer in which two methyl groups are bonded to Si in the structure.
Although it is a chill silicone oil, the above
"Alkyl-modified silicone oil"
[OSi (CH_Three) (R¹)] And / or [OSi
(R¹) (R^Two)] Is contained in the structure.
It Where R¹And R^TwoAre each independently carbon
Alkyl group having 2 or more carbon atoms, cycloal having 3 or more carbon atoms
Kill group and alkyl-substituted cycloalkyl having 4 or more carbon atoms
It is selected from ru radicals. The alkyl of the alkyl group is linear
Or it may be a side chain. R¹And R^TwoAs an example of
Is an ethyl group, a propyl group, a butyl group, a pentyl group, a
Xyl, octyl, nonyl, decyl, dodecyl
Group, tetradecyl group, hexadecyl group, octadecyl group
Group, cyclopentyl group, cyclohexyl group, cyclohep
Examples thereof include a tyl group and a 2-methylcyclohexyl group.
Further, the above alkyl-modified silicone oil relating to the present invention is used.
Is a repeating unit [OSi (CH _Three)_Two] Small
It may be contained in an amount of R¹Or R^TwoIs 1
With substituents having one or more unsaturated bonds
It may contain a small amount of repeating units. Book
Incorporated in the water-based lubricating oil composition for non-ferrous metal plastic working of the invention
The above alkyl-modified silicone oil is
Two or more kinds can be used in combination.

The alkyl aralkyl modified silicone oil is the same as the alkyl modified silicone oil described above.
Usually, it is not particularly limited as long as it is used as a lubricant, a release agent, a hydraulic oil and the like. The “alkyl aralkyl-modified silicone oil” according to the present invention has a structure containing [OSi (CH ₃ ) (R ³ )] and / or [OSi (R ³ ) (R ⁴ )] as a repeating unit. is there. Here, R ³ and R ⁴ are each independently selected from a phenyl group, a diphenyl group, a naphthyl group, a tolyl group, an alkylphenyl group, a dialkylphenyl group, an alkylnaphthyl group, a dialkylnaphthyl group and the like. Alkyl as a substituent usually has 1 to 1 carbon atoms.
2, which may be linear or side chain. The alkylaralkyl-modified silicone oil according to the present invention has a repeating unit of [OSi (CH ₃ ).
₂ ], at least 1 selected from the above-exemplified [OSi (CH ₃ ) (R ¹ )] and [OSi (R ¹ ) (R ² )]
It may contain a small amount of seeds, and the above R ¹ ,
Any one of R ² , R ³ and R ⁴ may contain a small amount of a repeating unit having a substituent having one or more unsaturated bonds. The alkyl aralkyl-modified silicone oil contained in the non-ferrous metal plastic working water-based lubricating oil composition of the present invention may be used alone or in combination of two or more.

The alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil contained in the non-ferrous metal plastic working water-based lubricating oil composition of the present invention may be processed other than those exemplified above. Any non-ferrous metal material that is not corrosive or reactive and can be emulsified, dispersed or solubilized by a surfactant can be used without any particular problems.

The alkyl-modified silicone oil and the alkyl-aralkyl-modified silicone oil each have a viscosity of 2 at 25 ° C. in consideration of lubricity and processability.
It is preferably 00 mm ² / s or more. It is more preferably 250 mm ² / s or more, and further preferably 30
It is 0 mm ² / s or more. However, the upper limit is 10000 mm
² / s. Viscosity at 25 ° C is 200 mm ² / s
If it is less than the above range, the oil film strength on the processed portion may be lowered and the performance may not be sufficient.

The above-mentioned alkyl-modified silicone oil and / or the above-mentioned alkyl-aralkyl-modified silicone oil constituting the water-based lubricating oil composition for non-ferrous metal plastic working of the present invention is contained in the composition in a total amount of 30% by weight or more. It is preferable. It is more preferably 50% by weight or more, and most preferably 70% by weight or more. Content is 30% by weight
If it is less than the above, the effect is recognized as compared with the case where it is not contained, but the processing performance is inferior to the powder dispersion type lubricant using graphite or molybdenum disulfide.

The lubricating oil component may be only at least one modified silicone oil selected from the above alkyl-modified silicone oil and the above-mentioned alkylaralkyl-modified silicone oil. This modified silicone oil and the modified silicone oil will be described below. It may contain a base oil component. The base oil component is not particularly limited as long as it is emulsified, dispersed or solubilized by a surfactant. Examples include petroleum distillation refined products such as mineral oil, liquid paraffin, light oil, and kerosene, synthetic esters,
Examples thereof include polyolefin, polybutene, oil and fat, polyether, polyfluorocarbon, polyalkylbenzene and the like. Of these, mineral oil is preferred. These can be used alone or in combination of two or more.

When the lubricating oil component is composed of the modified silicone oil and the base oil component, the content ratio of these components is preferably 5 to 95 when the total content of these components is 100% by weight. % By weight, 5 to 95% by weight of base oil component, more preferably 30 to 90% by weight of modified silicone oil, 10 to 70% by weight of base oil component, and further preferably 50 to 9 by modified silicone oil.
0% by weight, and the base oil component is 10 to 50% by weight.

As the lubricating oil component of the present invention, an oil component which is neither corrosive nor reactive with the non-ferrous metal material to be processed and which is emulsified, dispersed or solubilized by a surfactant is used without any particular problem. be able to.

The surfactant used to emulsify, disperse or solubilize the above-mentioned lubricating oil component in water is not particularly limited, and it is a surfactant used in ordinary water-based metal working oils and lubricating oils. If there is no particular problem, it can be used.
Examples of the surfactant include fatty acid metal salts or amine salts, carboxylic acid metal salts or amine salts, alkyl sulfonate metal salts or amine salts, alkyl sulfuric acid metal salts or amine salts, and alkylbenzene sulfonic acid metal salts. Alternatively, anionic salts such as amine salts, metal salts of alkylphosphoric acid or amine salts, polyoxyethylene alkyl ethers, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene polyoxypropylene alkyls. Phenyl ether, polyoxyethylene polyoxypropylene block copolymer, polyoxyethylene sorbitan alkyl ester,
Nonionic surfactants such as polyglycerin alkyl esters, alkylamine polyoxyethylene adducts, alkylamine polyoxyethylene polyoxypropylene adducts and the like can be mentioned. Other than the above-mentioned surfactant, it is not corrosive or reactive to the non-ferrous metal to be processed and can emulsify, disperse or solubilize the lubricating oil component containing the alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil. If so, it can be used without any particular problems. These can be used alone or in combination of two or more. The content of the surfactant is preferably 1 to 30 parts by weight, more preferably 3 parts by weight, when the total amount of the lubricating oil component is 100 parts by weight.
-20 parts by weight, more preferably 5-10 parts by weight.
If the content of the surfactant is less than 1 part by weight, the lubricating oil component may not be sufficiently emulsified, dispersed or solubilized.

Water is contained in the non-ferrous metal plastic working water-based lubricant composition of the present invention, and the content thereof is preferably 10 to 70 when the total amount of the lubricating oil component is 100 parts by weight. Parts by weight, more preferably 20 to 60 parts by weight,
More preferably, it is 30 to 50 parts by weight. As the dispersion medium for emulsifying, dispersing or solubilizing the lubricating oil component,
Although water is mainly used, it does not adversely affect emulsion emulsification, dispersion, or solubilization of the entire system, such as emulsion destruction, and further deteriorates quality such as corrosion, reaction, and deterioration of the non-ferrous metal material to be processed. A water-soluble solvent may be added and used as long as it does not generate. For example, ethylene glycol,
Examples thereof include glycol solvents such as diethylene glycol and triethylene glycol, carbitol solvents such as methyl carbitol and ethyl carbitol, and pyrrolidone solvents such as 2-pyrrolidone and N-methylpyrrolidone.
These can be used alone or in combination of two or more. The addition amount of these is preferably 1 to 70 parts by weight, and more preferably 5 to 50 parts by weight with respect to 100 parts by weight of water.

The method for emulsifying, dispersing or solubilizing the above-mentioned lubricating oil component is not particularly limited, and any known method can be used. When containing multiple components as the lubricating oil component,
All the components may be treated together, or one component or any two or more components may be separately treated and then finally mixed.

To the non-ferrous metal plastic working water-based lubricant composition of the present invention, a wax emulsion or wax suspension in which a wax component is emulsified or dispersed in water can be added for the purpose of improving lubricity and workability. . Examples of the wax component include paraffin wax, microcrystalline wax, polyethylene wax, polypropylene wax, synthetic wax such as polyalphaolefin, carnauba wax, montan wax, beeswax, natural wax such as lanolin wax, oxidized wax and petrolatum oxide. Examples thereof include wax oxides. These can be used alone or in combination of two or more.

A wax emulsion or a wax suspension is prepared by emulsifying or dispersing the above wax component in the presence of the above-exemplified surfactant and the like. The method is not particularly limited. still,
The method for preparing the wax emulsion or the wax suspension also includes a method of utilizing an acidic group such as a carboxyl group contained in the wax and adding an alkali to perform self-emulsification or self-dispersion. Further, a more stable wax emulsion or wax suspension can be prepared by combining emulsification and dispersion with a surfactant and such self-emulsification and dispersion.

When the above-mentioned wax emulsion and / or the above wax suspension is contained in the non-ferrous metal plastic working water-based lubricant composition of the present invention, the above-mentioned lubricating oil component which has been emulsified, dispersed or solubilized, and the above wax emulsion. And / or the wax suspension is mixed. It is not preferable to emulsify, disperse or solubilize the lubricating oil component before emulsifying, dispersing or solubilizing in the presence of the wax emulsion and / or the wax suspension. This is because the wax component may be dissolved / dispersed in the alkyl-modified silicone oil and the alkylaralkyl-modified silicone oil contained in the lubricating oil component, and in such a case, the effect of containing the wax component may not be sufficiently exhibited. is there.

When the wax emulsion and / or the wax suspension is used, the total solid content of the wax component is preferably 1 to 20 parts by weight, more preferably 3 parts by weight, based on 100 parts by weight of the lubricating oil component.
-15 parts by weight, more preferably 5-10 parts by weight.
If it exceeds 20 parts by weight, the effect of containing the alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil is reduced, which is not preferable.

The water-based lubricant composition for non-ferrous metal plastic working of the present invention includes various additives for improving lubricity, workability and adjusting physical properties such as viscosity.
For example, zinc dithiophosphate, polysulfide, lubricating additives such as phosphoric acid ester, benzotriazole, tolyltriazole, anticorrosive agents such as mercaptobenzothiazole, antioxidants such as amine-based and phenol-based,
Antiseptic, water softener, chelating agent, pH adjuster, dye,
Colorants such as pigments, defoaming agents, and fragrances. Furthermore, a component that does not deteriorate the processing performance and does not cause deterioration of quality such as corrosion, reaction and deterioration with respect to the non-ferrous metal material to be processed can be used without any particular trouble.

The non-ferrous metal plastic working water-based lubricating oil composition of the present invention can be used for processing materials covering all non-ferrous metals. As the non-ferrous metal, magnesium, magnesium alloy, aluminum, aluminum alloy, zinc,
Copper, brass, titanium and the like can be mentioned, and among them, particularly excellent effects are exhibited on magnesium, magnesium alloys, aluminum and aluminum alloys.

The processing targeted by the water-based lubricating oil composition for non-ferrous metal plastic working of the present invention is general plastic working. For example, rolling, drawing, forging, pressing, ironing of non-ferrous metal materials, It can be used for deep drawing. Among these, it can be most preferably used especially when used for so-called plate forming processing (for example, press processing, ironing processing, deep drawing processing, etc.).

When a magnesium material is processed under the conditions shown in the following examples using the non-ferrous metal plastic working water-based lubricating oil composition of the present invention, its friction coefficient is preferably 0.04.
˜0.20, more preferably 0.04 to 0.18, still more preferably 0.04 to 0.15. Further, when an aluminum material is processed in the same manner, its friction coefficient is preferably 0.05 to 0.25, more preferably 0.05 to 0.23, still more preferably 0.05 to 0.
It can be 20.

[0024]

EXAMPLES The water-based lubricating oil composition for non-ferrous metal plastic working of the present invention will be specifically described below with reference to examples. 1. Preparation of non-ferrous metal plastic working water-based lubricant composition The following components were mixed in the proportions shown in Tables 1 and 2, and Example 1
-10 and the composition of Comparative Examples 1-2 were obtained. The emulsion was manufactured as follows. <Preparation of Emulsion> A predetermined amount of alkyl-modified silicone oil and / or alkylaralkyl-modified silicone oil and mineral oil were placed in a container and stirred at room temperature until uniform. Then add a predetermined amount of surfactant and water,
The mixture was stirred at room temperature, and then the mixed liquid was thoroughly mixed by a high pressure homomixer (Gaurin Co.) to obtain a stable emulsion.

(A) Alkyl-modified silicone oil A;
Product name “TSF4421” (manufactured by GE Toshiba Silicones Co., Ltd.) The viscosity at 25 ° C. is 500 mm ² / s. (B) Alkyl-modified silicone oil B; trade name "XF
42-A3161 "(manufactured by GE Toshiba Silicones Co., Ltd.) The viscosity at 25 ° C. is 50 mm ² / s. (C) Alkyl aralkyl modified silicone oil; trade name “TSF4428” (manufactured by GE Toshiba Silicones Co., Ltd.) The viscosity at 25 ° C. is 1000 mm ² / s. (D) Mineral oil; trade name "TY oil" (manufactured by Mitsubishi Nisseki Co., Ltd.) (e) Surfactant: polyoxyethylene alkyl ether, trade name "Softanol 30,50,70,120"
(All manufactured by Nippon Shokubai Co., Ltd.) The mixture was used according to the emulsified state. (F) Wax emulsion A predetermined amount of oxidized polyethylene wax (manufactured by Allied Signal Co., Ltd.), a surfactant, potassium hydroxide (special grade reagent for industrial use, manufactured by Wako Pure Chemical Industries, Ltd.) and water are charged into a reaction vessel, and 70 to 8 are added.
Stir at 0 ° C. until solid is gone. Then, the mixed solution was thoroughly mixed by a high-pressure homomixer (Gaurin Co.) to obtain a wax emulsion having a pure wax concentration of 25% by weight. (G) Molybdenum disulfide dispersion liquid: trade name "M25" (manufactured by Nichimori Co., Ltd.) This is 10 to 20% of molybdenum disulfide dispersed in mineral oil.

2. Performance Evaluation Using each of the non-ferrous metal plastic working water-based lubricating oil compositions shown in Tables 1 and 2, lubricity was evaluated by the Bowden test shown below. After that, one end of the test piece after the test was grasped and left standing at room temperature for 1 hour in a suspended state, and the appearance of the surface of the test piece was visually observed to evaluate the degree of stain. The results are shown in Tables 1 and 2. [Bauden test] A magnesium plate (material: AZ31) and an aluminum material (material: A3004) are 20 mm in length,
It was processed into a size of 160 mm in width and 0.8 mm in height, and this was used as a test piece, and the surface thereof was coated with each non-ferrous metal plastic working water-based lubricating oil composition, followed by SUJ.
Using a test ball of 23/16 inch, the test piece was slid 20 times at a temperature of 250 ° C. under a load of 1 kg.
Then, the lubricity was evaluated by calculating the average friction coefficient after sliding 20 times.

[0027]

[Table 1]

[0028]

[Table 2]

3. Test Results From Tables 1 and 2, Examples 1 to 5 to which the emulsion of alkyl-modified silicone oil was added exhibited a lower friction coefficient than Comparative Example 2 containing only mineral oil, and had excellent lubricity. You can see that Example 3 with the same alkyl-modified silicone oil A but no mineral oil was even better than Examples 1 and 2. Even with the same alkyl-modified silicone oil, the viscosity at 25 ° C is 500m.
Example 3, which has a high m ² / s, shows better lubricity than Example 4 having 50 mm ² / s. Furthermore, Example 6 in which the wax emulsion was added has a friction coefficient of 0.08 for the magnesium material and 0.10 for the aluminum material, which is better than those of Example 3 and Comparative Example 1 using the molybdenum disulfide dispersion. It showed lubricity. Further, Examples 7 and 9, which are compositions containing both the alkyl-modified silicone oil and the alkylaralkyl-modified silicone oil, also showed the same or higher performance than that of Example 3. Examples 8 and 10 in which a wax emulsion was further added to these also showed equivalent performance.

Further, an alkyl-modified silicone oil 30
Examples 3 to 10 emulsifying a lubricating oil component containing at least wt%
Shows the same degree of lubricity as Comparative Example 1 which is a molybdenum disulfide dispersion liquid showing excellent performance as a lubricant for non-ferrous metal plastic working. Further, comparing the appearance of the test pieces after the test, in Comparative Example 1 which is a molybdenum disulfide dispersion liquid, while black molybdenum disulfide powder remains on the surface of the test piece even after suspension for 1 hour after the test, Examples 1 to 5, 7, 9 and Comparative Example 2 in which modified silicone oil and mineral oil are emulsified are:
Although metallic luster is recognized, in Examples 6, 8 and 10 in which the wax emulsion was added, a slight white residue was recognized on the surface of the test piece.

[0031]

According to the water-based lubricating oil composition for non-ferrous metal plastic working of the present invention, an alkyl-modified silicone oil and / or
Or, the lubricating oil component containing the alkyl aralkyl modified silicone oil is emulsified, dispersed or solubilized, so that it is equal to or more than a powder dispersion type lubricant such as graphite or molybdenum disulfide during plastic working of non-ferrous metal materials. Have sex. In particular, the modified silicone oils having a viscosity of 200 mm ² / s or more at 25 ° C. show more excellent lubricity and processability. Further, the content of the modified silicone oil is 30% by weight based on the whole lubricating oil component.
If it is above, it is not necessary to consider the reactivity to the non-ferrous metal material. Further, those containing mineral oil as a lubricating oil component are more excellent in lubricity. Further, by adding a wax emulsion and / or a wax suspension to the lubricating oil composition for non-ferrous metal plastic working of the present invention, lubricity and workability are further improved. And
Since the non-ferrous metal plastic working water-based lubricating oil composition of the present invention does not cause sedimentation / separation of the components, a lubricating oil having a stable composition can be continuously supplied, and there is little dirt around the work or machine. In addition, the working environment can be improved.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10N 40:24 C10N 40:24 AZ F term (reference) 4H104 AA01Z CJ05A CJ05C CJ06A CJ06C DA05C DA06A EA02A EB04 PA23 PA24 PA33 QA02 QA05

Claims (6)

[Claims] 1. A lubricating oil component containing water, a surfactant, and an alkyl-modified silicone oil and / or an alkylaralkyl-modified silicone oil, and containing the alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil. Is emulsified, dispersed or solubilized in water by the surfactant, and a non-ferrous metal plastic working water-based lubricant composition. 2. The non-ferrous metal plastic working water-based lubricant composition according to claim 1, wherein the alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil has a viscosity at 25 ° C. of 200 mm ² / s or more. 3. The non-ferrous metal plastic working water-based lubricant composition according to claim 1, wherein the lubricating oil component contains 30% by weight or more of the alkyl-modified silicone oil and / or the alkylaralkyl-modified silicone oil. 4. The non-ferrous metal plastic working water-based lubricant composition according to claim 1, wherein the lubricating oil component further contains mineral oil. 5. The water-based lubricant composition for non-ferrous metal plastic working according to claim 1, further comprising a wax emulsion and / or a wax suspension. 6. The non-ferrous metal plastic working water-based lubricating oil composition according to claim 1, which is used for processing a non-ferrous metal material selected from magnesium, magnesium alloys, aluminum and aluminum alloys.