JP2019038971A - Lubricant for extracting non-ferrous metal - Google Patents

Abstract

To provide a lubricant for extracting a non-ferrous metal, having excellent lubricity and improved workability without using a technique of converting to high viscosity.SOLUTION: The lubricant for extracting a non-ferrous metal is characterized by that the lubricant for extracting a non-ferrous metal contains a base oil and a branched olefin polymer, wherein the branched olefin polymer is at least one kinds selected from a group consisting of polyisobutylene, polyisoprene, ethylene-propylene copolymer, and styrene-butadiene copolymer, has an average molecular weight of 10,000-5,000,000; when a circular column rod (φ4.0 mm) is soaked in a liquid tank filled with the lubricant for extracting at room temperature, then the circular column rod is extracted from its liquid level at a velocity of 0.5 m/min in its vertical direction, an elongation quantity of the thus formed liquid column at its rupture point is 4-40 cm, and a kinematic viscosity of the lubricant for extracting at 40°C is 500-5000 mm/s.SELECTED DRAWING: None

Description

  The present invention relates to a lubricant for drawing a non-ferrous metal typified by aluminum or copper, or a wire, rod or steel pipe coated with other materials.

  Conventionally, in the drawing of non-ferrous metals such as aluminum or copper, or wire rods, rods, or pipes in which these non-ferrous metals are coated with other materials such as aluminum steel pipes, the workpiece and the die are in direct contact. Lubricants are used to prevent seizure and to keep slippery and stable processing.

  As a lubricant for drawing, mineral oil or high-viscosity synthetic hydrocarbon oils such as polybutene are used as base oils, and various additives include oily agents such as fatty acids, fatty acid esters or alcohols, phosphorus, sulfur. Or a mixture of one or more chlorinated extreme pressure agents. In order to improve the lubricity in the drawing process, the amount of oil is increased and the viscosity of mineral oil is increased to adjust the amount of oil introduced.

  However, with the recent speeding up of the drawing process, the conventional technology may cause seizure due to oil film breakage during the drawing process, which hinders the drawing process. In such a case, it is common to increase the amount of oil introduced to the friction surface by increasing the viscosity of the lubricant to prevent seizure due to oil film breakage.

  As a drawing lubricant having excellent lubricity, Patent Document 1 discloses that 2 to 25% by weight of fat or aliphatic dicarboxylic acid is added to a lubricating base oil such as polybutene or polyisobutylene having a viscosity at 40 ° C. of 600 to 45000 cSt. In addition, there is disclosed a lubricating oil for drawing processing in which an oiliness improver such as a higher fatty acid or higher alcohol is blended as required. The drawing lubricating oil has a small viscosity change with temperature, is chemically stable and has excellent adhesion to the surface of the wire, and therefore forms a good lubricating film (oil film) on the friction surface.

  In Patent Document 2, as a wire drawing lubricant for a flux-cored wire for aluminum brazing, 1 to 20% by weight of alcohol is contained as an additive, and the balance is a base oil, and a kinematic viscosity of 3000 cSt (40 ° C.) or higher. A wire drawing lubricating oil containing isobutylene and polyisobutylene having a kinematic viscosity of 20 cSt (40 ° C.) or less and having an overall kinematic viscosity of 400 to 1000 cSt (40 ° C.) is disclosed, and the wire drawing lubricating oil is drawn It is disclosed that the lubricity during processing is good, seizure hardly occurs, and there is little residual carbon when annealing after wire drawing.

Japanese Patent No. 2551459 JP 2008-1825 A

  High viscosity is a common technique for improving the performance of drawing lubricants. When drawing at high speed, the tool temperature of dies and plugs increases and the viscosity of the lubricant decreases. Then, due to the rupture (oil film breakage) of the introduced oil film, the tool and the material to be processed come into metal contact and adhesion and seizure occur. For this reason, there is a limit to speeding up the drawing process, and there is still room for improvement in the performance of the above-described conventional lubricating oil. For high viscosity products, they are attached to the periphery of the processing machine, floor, etc., and are difficult to wash away when wires, rods and pipes, especially residual oil and residues in the pipes are produced, and are highly viscous and not fluid. There are problems in workability such as difficulty in handling.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a drawing lubricant composition that is excellent in lubricity and improved in workability regardless of a technique for increasing viscosity.

The present invention solves the above-described problems in the prior art, and includes the following items.
The non-ferrous metal drawing lubricant of the present invention is a drawing lubricant containing a base oil and a branched olefin polymer, wherein the branched olefin polymer comprises polyisobutylene, polyisoprene, an ethylene-propylene copolymer, and styrene. -At least one selected from the group consisting of butadiene copolymers and having an average molecular weight of 10,000 to 5,000,000, and a cylindrical rod (φ4.0 mm) in a liquid tank filled with the drawing lubricant at room temperature. ), And the liquid column has an elongation of 4 to 40 cm at the breaking point of the liquid injection formed when the cylindrical rod is pulled up from the liquid surface in the vertical direction at a speed of 0.5 m / min. The kinematic viscosity of the lubricant for use at 40 ° C. is 500 to 5000 mm ² / s.

Furthermore, it is preferable to contain at least one oily agent selected from the group consisting of esters, alcohols and carboxylic acids.
In the total of the base oil, the oil-based agent, and the branched olefin polymer, the content of the branched olefin polymer is preferably 0.0001 wt% (1 ppm) to 50 wt%.
In the total of the base oil, the oily agent, and the branched olefin polymer, the content of the branched olefin polymer is 0.0001 wt% to 20 wt%, and the average molecular weight of the branched olefin polymer is 100,000 to 3 million. It is preferable that
The branched olefin polymer is preferably polyisobutylene.

By incorporating a specific branched olefin polymer, the drawing lubricant of the present invention is excellent in stringiness even at a relatively low viscosity. That is, in the drawing lubricant of the present invention, the balance between the stringiness and the viscosity is optimized.
The present invention has found a drawing lubricant that has a low viscosity and excellent lubricity, and the drawing lubricant does not cause oil film breakage even when drawn at a high speed, and can be efficiently performed. Demonstrates the effect of stable drawing.

FIG. 1 is a schematic diagram of a testing machine. FIG. 2 is a view showing a state in which a drawing wire is drawn through a carbide die and processed into a thin shape.

The present invention will be described in detail below.
The non-ferrous metal drawing lubricant of the present invention (hereinafter also simply referred to as “pulling lubricant”) contains a base oil and a branched olefin polymer, and the branched olefin polymer is polyisobutylene, polyisoprene, ethylene-propylene. In a liquid tank that is at least one selected from the group consisting of a copolymer and a styrene-butadiene copolymer, has an average molecular weight of 10,000 to 5,000,000, and is filled with the drawing lubricant at room temperature. When the cylindrical rod (φ4.0 mm) is immersed and the cylindrical rod is pulled up from the liquid surface in the vertical direction at a speed of 0.5 m / min, the amount of elongation of the liquid column is 4 to 4 The kinematic viscosity at 40 ° C. of the drawing lubricant is 500 to 5000 mm ² / s.

Hereinafter, each requirement of the above-mentioned drawing lubricant will be described in detail.
The drawing lubricant includes at least one base oil selected from the group consisting of mineral oil, non-hydrogenated and hydrogenated (hydrogenated) polybutene, and isoparaffin (hydrogenated polyisobutene). That is, any base oil usually used for a lubricant can be added to the above-mentioned drawing lubricant.
The said base oil may be used individually by 1 type, and may mix and use 2 or more types.

  The content of the base oil in the drawing lubricant is usually 10 to 90% by weight, preferably 40 to 80% by weight in the total of the base oil and the branched olefin polymer. By appropriately changing the content of the base oil within the above range, the viscosity of the drawing lubricant can be easily adjusted.

The drawing lubricant is at least one selected from the group consisting of polyisobutylene, polyisoprene, ethylene-propylene copolymer, and styrene-butadiene copolymer as a branched olefin polymer, and has an average molecular weight of 1 Polymers that are 10,000 to 5,000,000 are included.
The above polyisobutylene, polyisoprene, ethylene-propylene copolymer, and styrene-butadiene copolymer may be either hydrogenated or non-hydrogenated.
These branched olefin polymers preferably have an average molecular weight of 100,000 to 3,000,000, more preferably 500,000 to 2,000,000. The average molecular weight usually refers to the number average molecular weight (Mn) measured by gel permeation chromatography (GPC). By appropriately changing the average molecular weight of the branched olefin polymer within the range of 10,000 to 5,000,000, the balance between the viscosity of the drawing lubricant and the stringiness can be adjusted. When the average molecular weight of the branched olefin polymer exceeds 5,000,000, although the stringiness is high, the liquid fluidity is lowered, which may hinder the improvement of the lubricity.

  The content of the branched olefin polymer in the drawing lubricant is 0.0001% by weight (1 ppm) to 50% by weight, preferably 0.0001% by weight in the total of the base oil, the branched olefin polymer, and the oily agent described later. (1 ppm) to 20% by weight. When the content of the branched olefin polymer is less than 0.0001% by weight (1 ppm), the drawing lubricant may not exhibit sufficient stringiness. On the other hand, if it exceeds 50% by weight, the stringiness is remarkably increased, the liquid fluidity is lowered, and the lubricity may be prevented from being improved.

In addition to the base oil and the branched olefin polymer, the drawing lubricant may further contain at least one oily agent selected from the group consisting of esters, carboxylic acids, and alcohols.
A polar compound having a polar group that strongly bonds to a metal at one end of the molecule and having a long carbon chain forms an adsorption film on the metal surface by physical adsorption or chemical adsorption. The oil-based agent is an additive that forms an adsorption film on a metal surface such as a drawing material for drawing or a die and exhibits a wear reduction effect at a relatively low temperature and low load.

Here, the ester added as the oily agent is represented by the general formula R ¹ C (═O) OR ² (R ¹ is an alkyl group having 8 to 20 carbon atoms; R ² is an alkyl group having 1 to 24 carbon atoms). The fatty acid esters represented are preferred. Specific examples of the ester include methyl caprylate, ethyl caprylate, propyl caprylate, butyl caprylate, methyl pelargonate, ethyl pelargonate, propyl pelargonate, butyl pelargonate, methyl caprate, ethyl caprate, capric acid Propyl, butyl caprate, methyl laurate, ethyl laurate, propyl laurate, butyl laurate, methyl myristate, ethyl myristate, propyl myristate, butyl myristate, methyl palmitate, ethyl palmitate, propyl palmitate, Examples include butyl palmitate, methyl stearate, ethyl stearate, propyl stearate, butyl stearate, methyl oleate, ethyl oleate, propyl oleate, and butyl oleate. Among the esters, not only monoesters but also diester, triester, tetraester, and hindered ester structures are included. That is, the esterified product of the said fatty acid and a polyhydric alcohol etc. are mentioned. Examples of the polyhydric alcohol include ethylene glycol, glycerin, sorbitol, neopentyl glycol, trimethylolpropane, and pentaerythritol. In particular, oils and fats which are esters of glycerin and fatty acids include natural oils and synthetic products such as rapeseed oil.

  Specific examples of the carboxylic acid include linear saturated fatty acids such as capric acid, undecanoic acid, lauric acid, tridecanoic acid, demisteric acid, pentadecanoic acid, palmitic acid, margaric acid, stearic acid, and behenic acid, palmitoleic acid, There are unsaturated fatty acids such as oleic acid, linoleic acid, linolenic acid, and ricinoleic acid. Of these, lauric acid, myristic acid, palmitic acid, and oleic acid are preferred in view of lubricity, workability, long-term stability, and cost.

As a specific example of the alcohol, a higher alcohol represented by the general formula R ³ OH (where R ³ is an alkyl group having 4 to 24 carbon atoms) is preferable. The number of carbon atoms of R ³ is 12 to 18 is more preferable.

  The content of the oily agent in the drawing lubricant is usually 0.1 to 60% by weight, preferably 1 to 40% by weight, based on the total of the base oil, the branched olefin polymer and the oily agent.

  In addition, the above-mentioned drawing lubricant may contain an additive such as an inorganic substance such as calcium carbonate and a heat-resistant resin such as PTFE (polytetrafluoroethylene) within the range not impairing the effects of the present invention. The content of these additives is usually 0.1 to 60% by weight, preferably 1 to 40% by weight, in the total of the base oil, the branched olefin polymer and the oily agent.

  As described above, the lubricity is improved by increasing the viscosity of the lubricant. However, there are adverse effects caused by the increase in viscosity. Specifically, if the lubricant adheres to the periphery of the processing machine or the floor, it is difficult to clean and remove, and it is difficult to handle due to poor fluidity. Arise. In the present invention, by adding a high molecular weight branched olefin polymer having a bent structure to the drawing lubricant, the branched polybutylene is high even in an excessive frictional state having a high shear stress due to the rheological property. Since the viscosity is maintained, the oil film is less likely to break and seizure can be prevented. In other words, the drawing lubricant of the present invention contains a specific branched olefin polymer, so that it can have high stringiness even without increasing the viscosity, and exhibits the lubricity necessary for drawing. Can do. The string pulling property refers to the property that a liquid pulls a string when a rod is put in a highly viscous liquid and pulled up quickly.

  Here, the lubricity of the drawing lubricant is evaluated by a sliding distance test as shown in FIG. That is, a small amount of the drawing lubricant 1 is dropped on the aluminum test plate 2, the steel ball 5 is pressed at a constant load W, and the drawing lubricant 1 is slid at a constant sliding speed, thereby acting on the steel ball 5. The force P is detected by a strain gauge, and the friction coefficient μ is calculated by the equation μ = P / W. When the oil film breaks, the friction coefficient increases rapidly. Therefore, in the present invention, the sliding distance up to the point when the friction coefficient rapidly increases is regarded as lubricity.

As an index of stringiness, a cylindrical rod (φ4.0 mm) is immersed in a liquid tank filled with a drawing lubricant at room temperature, and the cylindrical rod is pulled up vertically from the liquid surface at a speed of 0.5 m / min. The amount of elongation of the liquid column at the break point of the liquid injection sometimes formed is 4 to 40 cm.
If the extension of the liquid column is less than 4 cm, it may be difficult to sufficiently adhere to the drawing material because the viscosity of the drawing lubricant is low. On the other hand, if the elongation of the liquid column exceeds 40 cm, the viscosity is excessively high, and it is difficult to say that the problems in the prior art are solved. The amount of elongation of the liquid column is preferably 4 to 40 cm, and more preferably 4 to 20 cm.

In addition, the kinematic viscosity at 40 ° C. of the drawing lubricant is 500 to 5000 mm ² / s. When the kinematic viscosity is 500 mm ² / s or more, it is possible to confirm the expression of the stringiness by adding the branched olefin polymer to the above-mentioned drawing lubricant. However, when it exceeds 5000 mm ² / s, workability problems such as difficulty in cleaning and removal and handling are no different from those of the prior art.

  The drawing lubricant of the present invention can be prepared by stirring and mixing a base oil, a branched olefin polymer, and an oily agent by a usual method.

  The drawing lubricant of the present invention is particularly suitably used for drawing a non-ferrous metal typified by aluminum or copper, or a wire, rod or steel pipe coated with these metals. It should be noted that the drawing lubricant of the present invention can be widely used as a lubricant for other applications, for example, pressing, squeezing, ironing, bending, rolling, and cold forging. Needless to say.

EXAMPLES Hereinafter, although this invention is demonstrated more concretely based on an Example and a comparative example, this invention is not restrict | limited by these Examples.
[Example 1]
[1] Preparation of lubricant for drawing Polybutene (kinematic viscosity: 2100 mm ^{2 / s)} 80.85% by weight as a base oil, 6.9% by weight of oleic acid and 12% by weight of rapeseed oil as oily agents, branched olefin polymer A sample was prepared by mixing 0.15% by weight of polyisobutylene (average molecular weight 1.6 million) and 0.1% by weight of benzotriazole as a nonferrous anticorrosive.
In the examples and comparative examples, the total amount of the base oil, the oily agent, the branched olefin polymer, and the nonferrous corrosion inhibitor is 100% by weight.

[2] Evaluation of Lubricant for Pulling (1) Thread pulling property A cylindrical rod having a diameter of 4.0 mm was immersed in a 50 mL beaker containing 10 mL of the obtained sample at 25 ° C. at a speed of 0.5 m / min. The cylindrical rod was pulled up from the liquid surface in the vertical direction, and the amount of elongation (cm) of the liquid column at the break point of the formed liquid column was measured.
The results are shown in Table 3.

(2) Lubricity (sliding distance)
The lubricity of the sample was evaluated by the sliding distance test shown in Table 1.
As shown in FIG. 1, 0.5 mL of a sample was dropped on an aluminum test plate, a steel ball was pressed with a constant load (load load W), and the sample was slid at a constant sliding speed. The frictional force P acting on the steel ball was detected by a strain gauge, and the friction coefficient μ was calculated by the formula μ = P / W.
Since an increase in the coefficient of friction was observed due to oil film breakage, the distance at which the coefficient of friction increased rapidly was measured as the slip distance (mm).
The results are shown in Table 3.

(3) Pulling force and surface properties (seizure)
The drawing force and surface properties (seizure) were evaluated by a wire drawing test shown in Table 2.
After immersing the aluminum wire in the sample, the carbide die was drawn at a speed of 0.5 m / min, and the drawing force (kg) was evaluated based on the maximum load detected by the load cell.
The resulting material was visually observed for occurrence of seizure. The case where seizure occurred was judged as “Yes”, and the case where seizure did not occur and the wire surface was good was judged as “None”.
As a result, the pulling force was 119 to 146 kg in the example and 121 to 155 kg in the comparative example, and the superiority of the example was not recognized. However, on the surface of the material after the drawing, no burn-in was observed in the examples, whereas burn-in was observed in the comparative examples.
The results are shown in Table 3.

(4) Workability For ease of handling when applying the sample to the wire, add 200 mL of the sample to a 500 mL beaker, and if the sample shows fluidity when stirring, it is “good” and does not show fluidity or has a tendency to solidify If it is in the case, it was defined as “evil”.
The results are shown in Table 3.

[Example 2]
Polybutene (kinematic viscosity: 9000 mm ² / s) as base oil 80.9% by weight, oleic acid 18.9% by weight as oiliness agent, polyisobutylene (average molecular weight 1,600,000) 0.1% by weight as branched olefin polymer A sample was prepared by mixing 0.1 wt% of benzotriazole as a non-ferrous anticorrosive.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 3
As a base oil, polybutene (kinematic viscosity: 24000mm ² /s)50.93 wt% and polybutene (kinematic viscosity: 9000mm ² / s) and 30 wt%, as an oily agent, and 18.9 wt% of oleic acid, branched olefins A sample was prepared by mixing 0.07% by weight of polyisobutylene (average molecular weight 1,600,000) as a polymer and 0.1% by weight of benzotriazole as a nonferrous corrosion inhibitor.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 4
Polybutene as the base oil (kinematic viscosity: 24000 mm ^{2 / s)} 80.95% by weight, oleic acid 6.9% by weight and rapeseed oil 12% by weight, branched olefin polymer polyisobutylene (average molecular weight 1.6 million) A sample was prepared by mixing 0.05% by weight and 0.1% by weight of benzotriazole as a non-ferrous corrosion inhibitor.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 5
As a base oil, polybutene (kinematic viscosity: 24000mm ² /s)60.98 wt% and polybutene (kinematic viscosity: 170000mm ² / s) and 20 wt%, as an oily agent, and 18.9 wt% of oleic acid, branched olefins A sample was prepared by mixing 0.02% by weight of polyisobutylene (average molecular weight 3 million) as a polymer and 0.1% by weight of benzotriazole as a non-ferrous anticorrosive.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 6
As a base oil, polybutene (kinematic viscosity: 24000mm ² /s)60.9999 wt% and polybutene (kinematic viscosity: 170000mm ² / s) and 20 wt%, as an oily agent, and 18.9 wt% of oleic acid, branched olefins A sample was prepared by mixing 0.0001% by weight of polyisobutylene (average molecular weight 3 million) as a polymer and 0.1% by weight of benzotriazole as a non-ferrous anticorrosive.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 7
A sample was prepared by mixing 77% by weight of mineral oil (kinematic viscosity: 480 mm ² / s) as the base oil and 23% by weight of polyisobutylene (average molecular weight 60,000) as the branched olefin polymer.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 8
The base oil is polybutene (kinematic viscosity: 24000 mm ^{2 / s)} 80.97% by weight, the oily agent is 6.9% by weight oleic acid and rapeseed oil 12% by weight, and the branched olefin polymer is polyisoprene (average molecular weight 500,000). A sample was prepared by mixing 0.03% by weight with 0.1% by weight of benzotriazole as a non-ferrous anticorrosive. The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

Example 9
As base oil, polybutene (kinematic viscosity: 24000 mm ^{2 / s)} 80.93% by weight, as oily agent, 6.9% by weight of oleic acid and 12% by weight of C14-15 branched / linear alcohol mixture, as branched olefin polymer A sample was prepared by mixing 0.07% by weight of polyisobutylene (average molecular weight 1,600,000) and 0.1% by weight of benzotriazole as a non-ferrous corrosion inhibitor.
The obtained sample was evaluated in the same manner as in Example 1.
The results are shown in Table 3.

[Comparative Example 1]
A sample was prepared in the same manner as in Example 4 except that the branched olefin polymer was not used in Example 4.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 1 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 2]
A sample was prepared in the same manner as in Example 1 except that the branched olefin polymer was not used in Example 1.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 2 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 3]
A sample was prepared by mixing 75% by weight of polybutene (kinematic viscosity: 9000 mm ² / s) as a base oil and 25% by weight of dimer acid as an oily agent. In addition, this sample corresponds to one form of the lubricating oil for drawing process of patent document 1. FIG.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 3 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 4]
As base oil, mineral oil (kinematic viscosity 480 mm ² / s) 9% by weight and polybutene (kinematic viscosity: 24000 mm ² / s) 70% by weight, and as oil agent, oleic acid 10% by weight and stearic acid butyl ester 10% by weight A sample was prepared by mixing 1% by weight of carnauba wax as a lubricant additive. In addition, this sample corresponds to one form of the aluminum pipe drawing lubricating oil of patent 4783026.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 4 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 5]
Base oil: 63% by weight of polybutene (kinematic viscosity: 2100 mm ² / s), oily agent: 25% by weight of C14-C15 branched alcohol mixture, and 12% by weight of polyisobutylene (average molecular weight 60,000) as branched olefin polymer And a sample was prepared. In addition, this sample is a form close | similar to the lubricating oil for steel pipe processing of patent 4970777.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 5 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 6]
A sample was prepared by mixing 19% by weight of diethylene glycol diethyl ether and 80% by weight of polybutene (kinematic viscosity: 9000 mm ² / s) as a base oil component and 1% by weight of caprylic acid as an oily agent. In addition, this sample is a form close to the lubricating oil for drawing process of Unexamined-Japanese-Patent No. 11-209781.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 6 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 7]
A lubricating additive, 70% by weight of zinc 2-ethylhexyl dithiophosphate, and 30% by weight of a zinc salt of a fatty acid were mixed to prepare a sample. This sample corresponds to an embodiment of the lubricating oil composition for plastic working disclosed in Japanese Patent No. 4560174.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 7 was inferior in stringiness. In addition, the sliding distance was short and seizure was observed.

[Comparative Example 8]
In Comparative Example 4, as a base oil, polybutene: Instead of (kinematic viscosity 24000mm ² / s), polybutene (kinematic viscosity: 170000mm ² / s) except for using, in the same manner as in Comparative Example 4, the sample Prepared.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
Compared with Comparative Example 4, Comparative Example 8 used polybutene having a high kinematic viscosity, so the obtained sample also had a high kinematic viscosity, but there was no difference in stringiness. From this result, it can be seen that the stringiness cannot be obtained simply by increasing the kinematic viscosity of the lubricant.

[Comparative Example 9]
In Example 5, a sample was prepared in the same manner as in Example 5, except that the amount of polyisobutylene (average molecular weight: 3 million), which is a branched olefin polymer, was changed from 0.02% by weight to 0.03% by weight. did.
The obtained sample was evaluated in the same manner as in Example 1. The results are shown in Table 4.
In Comparative Example 9, where the content of the branched olefin polymer was larger than that in Example 5, the sliding distance was sufficiently long and no seizure was observed, but the stringiness was 45 cm. However, the sample tended to solidify in a jelly form, and a decrease in liquid fluidity was observed. In addition, if the fluidity of the liquid is lowered, it becomes difficult to clean the drawing lubricant and workability is lowered.

It shows below about the material of Table 3 and 4.
Mineral oil; mineral oil (kinematic viscosity 480mm ² / s)
Polybutene A; polybutene (kinematic viscosity 24,000 mm ² / s)
Polybutene B: Polybutene (kinematic viscosity 9,000 mm ² / s)
Polybutene C: Polybutene (kinematic viscosity 2,100 mm ² / s)
Polybutene D: Polybutene (kinematic viscosity 170,000 mm ² / s)
Oily agent A; Oleic acid oily agent B; Rape oily agent C; C14-15 branched / linear alcohol mixture
Non-ferrous anticorrosive; benzotriazole branched olefin polymer A: polyisobutylene (average molecular weight 1.6 million)
Branched olefin polymer B: polyisobutylene (average molecular weight 60,000)
Branched olefin polymer C: polyisobutylene (average molecular weight: 3 million)
Branched olefin polymer D: polyisoprene (average molecular weight 500,000)
Solvent A; diethylene glycol diethyl ether oil agent D; dimer acid oil agent E; stearic acid butyl ester oil agent F; C14-15 branched alcohol mixture oil agent G; caprylic acid lubricant additive A; carnauba wax lubricant additive B; Ethylhexyl dithiophosphate zinc lubricant additive C; zinc salt of fatty acid

1 Lubricant for drawing 2 Aluminum test plate 3 Support base 4 Cylindrical bar 5 Steel ball 6 Carbide die 7 Nonferrous metal fine wire W Load

Claims (5)

A non-ferrous metal drawing lubricant containing a base oil and a branched olefin polymer,
The branched olefin polymer is at least one selected from the group consisting of polyisobutylene, polyisoprene, ethylene-propylene copolymer, and styrene-butadiene copolymer, and has an average molecular weight of 10,000 to 5,000,000;
A liquid formed when a cylindrical rod (φ4.0 mm) is immersed in a liquid tank filled with the drawing lubricant at room temperature and pulled up from the liquid surface in a vertical direction at a speed of 0.5 m / min. The elongation of the liquid column at the breaking point of the note is 4 to 40 cm,
A non-ferrous metal drawing lubricant, wherein the drawing lubricant has a kinematic viscosity at 40 ° C. of 500 to 5000 mm ² / s.   The nonferrous metal drawing lubricant according to claim 1, further comprising at least one oily agent selected from the group consisting of esters, alcohols and carboxylic acids. Of the total of the base oil, oiliness agent, and branched olefin polymer,
The non-ferrous metal drawing lubricant according to claim 1 or 2, wherein the content of the branched olefin polymer is 0.0001 wt% (1 ppm) to 50 wt%. Of the total of the base oil, oiliness agent, and branched olefin polymer,
The content of the branched olefin polymer is 0.0001 wt% to 20 wt%, and
The non-ferrous metal drawing lubricant according to claim 3, wherein the branched olefin polymer has an average molecular weight of 100,000 to 3,000,000.   The non-ferrous metal drawing lubricant according to any one of claims 1 to 4, wherein the branched olefin polymer is polyisobutylene.

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