JP6979305B2 - Lubricant for extraction of non-ferrous metals - Google Patents

Description

The present invention relates to non-ferrous metals typified by aluminum and copper, or lubricants for drawing wires, rods or steel pipes coated with other materials.

Conventionally, in the drawing process of non-ferrous metals such as aluminum or copper, or wires, bars or pipes in which these non-ferrous metals are coated with other materials such as aluminum steel pipes, the work material and the die come into direct contact with each other. Lubricants are used to prevent seizure, make it slippery and maintain a stable working condition.

The lubricant for drawing is based on mineral oil or high-viscosity synthetic hydrocarbon oil such as polybutene, and as various additives, oil-based agents such as fatty acids, fatty acid esters or alcohols, phosphorus and sulfur. , Or a mixture of one or more chlorine-based extreme pressure agents. In order to improve the lubricity in the drawing process, the amount of oil introduced is adjusted by increasing the amount of oil-based agent and increasing the viscosity of mineral oil.

However, with the recent increase in the speed of drawing, seizure may occur due to the oil film running out during drawing, which has been an obstacle to drawing. 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 lubricant for drawing with excellent lubricity, Patent Document 1 states 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 of 600 to 45,000 cSt at 40 ° C. Further, if necessary, a lubricating oil for drawing processing containing an oiliness improving agent such as a higher fatty acid or a higher alcohol is disclosed. The drawing lubricating oil has a small change in viscosity with respect to temperature, is chemically stable, and has excellent adhesion to the wire surface, so that a good lubricating film (oil film) is formed on the friction surface.

Patent Document 2 contains 1 to 20% by weight of alcohol as an additive as a wire drawing lubricant for a flux-containing wire for aluminum brazing, and a poly with a kinematic viscosity of 3000 cSt (40 ° C.) or more as a base oil in the balance. Disclosed is 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.). It is disclosed that the lubricity at the time of processing is good, seizure is less likely to occur, and there is little residual coal when performing annealing after wire drawing.

Japanese Patent No. 2551459 Japanese Unexamined Patent Publication No. 2008-1825

Higher viscosity is a common method for improving the performance of drawing lubricants. When drawing at high speed, the temperature of tools such as dies and plugs rises and the viscosity of the lubricant decreases. Then, due to the breakage of the introduced oil film (cutting of the oil film), the tool and the material to be processed come into metal contact with each other, causing adhesion and seizure. Therefore, there is a limit to the speeding up of the drawing process, and there is still room for improvement in the performance of the lubricating oil in the above-mentioned conventional technique. In addition, high-viscosity products are difficult to clean and remove when they adhere to the periphery of the processing machine or on the floor, and when residual oil and residues in wires, rods, and pipes, especially pipes, are generated, and because of the high viscosity and lack of fluidity. There is a problem with workability such as difficulty in handling.

An object of the present invention is to provide a lubricant composition for drawing processing, which has excellent lubricity and improved workability, regardless of a method such as increasing the viscosity.

The present invention solves the above-mentioned problems in the prior art, and includes the following items.
The non-ferrous metal extraction lubricant of the present invention is a non-iron metal extraction lubricant containing a base oil and a branched olefin polymer, and the branched olefin polymer is a polyisobutylene, polyisoprene, or ethylene-propylene copolymer. , and styrene - is at least one selected from the group consisting of butadiene copolymers, under Atsushi Muro, is immersed cylindrical bar (4.0 mm) in the cited抜用lubricant liquid bath filled, velocity 0.5m The elongation amount of the liquid column at the break point of the liquid injection formed when the columnar rod is pulled up vertically from the liquid surface at / min is 4 to 40 cm, and the kinematic viscosity of the drawing lubricant at 40 ° C. The content of the branched olefin polymer is 0.0001% by weight to 20% by weight in the total of the base oil, the oiliness agent, and the branched olefin polymer, and the branched olefin is 500 to 5000 mm ^{2 / s.} The polymer is characterized by having an average molecular weight of 100,000 to 3 million.

Further, it preferably contains at least one oily agent selected from the group consisting of esters, alcohols and carboxylic acids.
The branched olefin polymer is preferably polyisobutylene.

By containing a specific branched olefin polymer, the drawing lubricant of the present invention has excellent stringability even at a relatively low viscosity. That is, in the drawing lubricant of the present invention, the balance between stringability and viscosity is optimized.
The present invention has found a drawing lubricant having a low viscosity and excellent lubricity, and the drawing lubricant efficiently does not cause oil film breakage even when the drawing process is performed at high speed. It has the effect of being able to perform stable drawing.

FIG. 1 is a schematic diagram of a testing machine. FIG. 2 is a diagram showing a state in which a drawing wire is pulled out through a carbide die and finely processed.

Hereinafter, the present invention will be described in detail.
The non-ferrous metal drawing lubricant of the present invention (hereinafter, also simply referred to as “drawing lubricant”) contains a base oil and a branched olefin polymer, and the branched olefin polymer is polyisobutylene, polyisoprene, or ethylene-propylene. It is at least one selected from the group consisting of copolymers and styrene-butadiene copolymers, has an average molecular weight of 10,000 to 5 million, and is placed in a liquid tank filled with the drawing lubricant at room temperature. The amount of elongation of the liquid column at the break point of the liquid injection formed when the columnar rod (φ4.0 mm) is immersed and the columnar rod is pulled up vertically from the liquid surface at a speed of 0.5 m / min is 4 to 4. It is 40 cm, and the kinematic viscosity of the drawing lubricant at 40 ° C. is 500 to 5000 mm ² / s.

Hereinafter, each requirement of the above-mentioned drawing lubricant will be described in detail.
The extraction lubricant includes at least one selected from the group consisting of mineral oil, non-hydrogenated and hydrogenated (hydrogenated) polybutene, and isoparaffin (hydrogenated polyisobutene) as the base oil. That is, any base oil usually used for the lubricant can be added to the extraction lubricant.
The above base oil may be used alone or in combination of two or more.

The content of the base oil in the drawing lubricant is usually 10 to 90% by weight, preferably 40 to 80% by weight, based on 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 extraction 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. Includes polymers that are between 10,000 and 5 million.
The above-mentioned polyisobutylene, polyisoprene, ethylene-propylene copolymer, and styrene-butadiene copolymer may be hydrogenated or non-hydrogenated.
The average molecular weight of these branched olefin polymers is preferably 100,000 to 3,000,000, more preferably 500,000 to 2,000,000. The average molecular weight usually refers to a 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 million, the balance between the viscosity and the stringability of the drawing lubricant can be adjusted. When the average molecular weight of the branched olefin polymer exceeds 5 million, the stringability is high, but the liquid fluidity is lowered, which may hinder the improvement of lubricity.

The content of the branched olefin polymer in the above-mentioned drawing lubricant is 0.0001% by weight (1 ppm) to 50% by weight, preferably 0.0001% by weight, based on the total of the base oil, the branched olefin polymer, and the oil-based agent described later. (1 ppm) to 20% by weight. If the content of the branched olefin polymer is less than 0.0001% by weight (1 ppm), the drawing lubricant may not exhibit sufficient stringability. On the other hand, if it exceeds 50% by weight, the stringiness is remarkably increased, the liquid fluidity is lowered, and the improvement of lubricity may be hindered.

In addition to the base oil and the branched olefin polymer, the extraction 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 strongly bonded 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 chemisorption. An oil-based agent is an additive that forms an adsorption film on the surface of a metal such as a drawing material for drawing or a die, and exhibits a wear reducing effect at a relatively low temperature and a low load.

Here, the ester to be added as the oily agent is of 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 ester represented is preferred. Specific examples of the above esters include methyl caprylate, ethyl caprylate, propyl caprylate, butyl caprylate, methyl pelargonate, ethyl pelargonate, propyl pelargonate, butyl pelargonate, methyl caprice, ethyl caprice, and 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, There are butyl palmitate, methyl stearate, ethyl stearate, propyl stearate, butyl stearate, methyl oleate, ethyl oleate, propyl oleate, butyl oleate and the like. The above esters are not limited to monoesters, but also include diesters, triesters, tetraesters, and hindered ester structures. That is, an esterified product of the above fatty acid and a polyhydric alcohol can also be mentioned. Examples of the polyhydric alcohol include ethylene glycol, glycerin, sorbitol, neopentyl glycol, trimethylolpropane, pentaerythritol and the like. It also includes natural fats and oils such as rapeseed oil and synthetic products, especially for fats and oils that are esters of glycerin and fatty acids.

Specific examples of the above carboxylic acids include linear saturated fatty acids such as capric acid, undecanoic acid, lauric acid, tridecanoic acid, demistric acid, pentadecanoic acid, partiminic acid, margaric acid, stearic acid, and behenic acid, and palmitoleic acid. There are unsaturated fatty acids such as oleic acid, linoleic acid, linolenic acid, and ricinolic acid. Of these, lauric acid, myristic acid, palmitic acid, oleic acid and the like are preferable in consideration of lubricity, workability, long-term stability and cost.

As a specific example of the above 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 carbon number of R ³ is more preferably 12 to 18.

The content of the oil-based 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 oil-based agent.

In addition, the extraction lubricant may contain an inorganic substance such as calcium carbonate or an additive such as a heat-resistant resin such as PTFE (polytetrafluoroethylene) as long as the effect of the present invention is not impaired. The content of these additives 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.

As described above, the lubricity is improved by increasing the viscosity of the lubricant. However, there are work problems such as the harmful effects of high viscosity, specifically, if the lubricant adheres to the periphery of the processing machine or the floor, it is difficult to clean and remove it, and it is difficult to handle it due to its poor fluidity. Occurs. In the present invention, by adding a high molecular weight branched olefin polymer having a bent structure to the above-mentioned drawing lubricant, the branched polybutylene is high even in an excessive friction state with high shear stress due to leopexiness. Since the viscosity is maintained, the oil film is less likely to break and seizure can be prevented. That is, by containing a specific branched olefin polymer, the drawing lubricant of the present invention can have high stringiness without increasing the viscosity, and exhibits the lubricity required for drawing. Can be done. The stringiness is the property that the liquid pulls the thread when the rod is put in a highly viscous liquid and pulled up quickly.

Here, the lubricity of the extraction lubricant is evaluated by a slip 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 with a constant load W, the drawing lubricant 1 is slid at a constant sliding speed, and the friction acting on the steel ball 5 is applied. The force P is detected by the strain gauge, and the friction coefficient μ is calculated by the formula μ = P / W. When the oil film runs out, this friction coefficient rises sharply. Therefore, in the present invention, the sliding distance up to the time when the friction coefficient rises sharply is defined as lubricity.

As an index of stringability, a columnar rod (φ4.0 mm) is immersed in a liquid tank filled with a drawing lubricant at room temperature, and the columnar 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 that is sometimes formed is 4 to 40 cm.
If the elongation amount 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, when the elongation amount of the liquid column exceeds 40 cm, the viscosity is excessively high, and it cannot be said that the problem in the prior art is solved. The amount of elongation of the liquid column is preferably 4 to 40 cm, more preferably 4 to 20 cm.

In addition, the kinematic viscosity of the drawing lubricant at 40 ° C. is 500 to 5000 mm ² / s. When the kinematic viscosity is 500 mm ² / s or more, it can be confirmed that the stringiness is exhibited by adding the branched olefin polymer to the above-mentioned drawing lubricant. However, if ^{it exceeds 5000 mm 2} / s, workability problems such as difficulty in cleaning and removal and difficulty in handling are the same as in the conventional technology.

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

The drawing lubricant of the present invention is particularly preferably used for drawing out non-ferrous metals such as aluminum and copper, or wires, rods or steel pipes 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 uses such as pressing, squeezing, ironing, bending, rolling, and cold forging. Needless to say.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples, but the present invention is not limited to these Examples and the like.
[Example 1]
[1] Preparation of lubricant for extraction ^{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 an oily agent, and a 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 non-iron anticorrosive agent.
In Examples and Comparative Examples, the total of the base oil, the oil-based agent, the branched olefin polymer, and the non-ferrous anticorrosive agent is 100% by weight.

[2] Evaluation of drawing lubricant (1) Stringability At 25 ° C, a cylindrical rod with a diameter of φ4.0 mm is immersed in a 50 mL beaker containing 10 mL of the obtained sample at a speed of 0.5 m / min. The columnar rod was pulled up vertically from the liquid surface, 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 slip distance test shown in Table 1.
As shown in FIG. 1, 0.5 mL of the sample was dropped on the aluminum test plate, the 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 friction coefficient was observed due to the oil film running out, the distance at which the friction coefficient suddenly increased was measured as the slip distance (mm).
The results are shown in Table 3.

(3) Pulling force and surface texture (seizure)
The pulling force and surface texture (seizure) were evaluated by the pulling test of the wire shown in Table 2.
After immersing the aluminum wire in the sample, the carbide die was pulled out at a speed of 0.5 m / min, and the pulling force (kg) was evaluated by the maximum value of the load detected by the load cell.
The occurrence of seizure was visually observed for the obtained material. The case where seizure occurred was "Yes", and the case where seizure did not occur and the surface of the wire was good was "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 process, seizure was not observed in the examples, whereas seizure was observed in the comparative examples.
The results are shown in Table 3.

(4) Workability Regarding the ease of handling when applying the sample to the wire, 200 mL of the sample is added to a 500 mL beaker, and the case where the sample shows fluidity during stirring is regarded as “good”, and it does not show fluidity or tends to solidify. The case in is "evil".
The results are shown in Table 3.

[Example 2]
Polybutene (kinematic viscosity: 9000 mm ^{2 / s)} 80.9% by weight as a base oil, 18.9% by weight of oleic acid as an oily agent, and polyisobutylene (average molecular weight 1.6 million) 0.1% by weight as a branched olefin polymer. And 0.1% by weight of benzotriazole as a non-iron anticorrosive agent were mixed to prepare a sample.
The obtained sample was evaluated by the same method 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 1.6 million) as a polymer and 0.1% by weight of benzotriazole as a non-iron anticorrosion agent.
The obtained sample was evaluated by the same method as in Example 1.
The results are shown in Table 3.

[Example 4]
Polybutene (kinematic viscosity: 24000 mm ^{2 / s)} 80.95% by weight as a base oil, 6.9% by weight of oleic acid and 12% by weight of rapeseed oil as an oily agent, and polyisobutylene as a branched olefin polymer (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-iron anticorrosive agent.
The obtained sample was evaluated by the same method 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-iron anticorrosion agent.
The obtained sample was evaluated by the same method 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-iron anticorrosion agent.
The obtained sample was evaluated by the same method 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 a base oil and 23% by weight of polyisobutylene (average molecular weight 60,000) as a 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]
Polybutene (kinematic viscosity: 24000 mm ^{2 / s)} 80.97% by weight as base oil, 6.9% by weight oleic acid and 12% by weight rapeseed oil as oiliness agents, and polyisoprene (average molecular weight 500,000) as branched olefin polymer. ) 0.03% by weight and 0.1% by weight of benzotriazole as a non-iron anticorrosion agent were mixed to prepare a sample. The obtained sample was evaluated by the same method as in Example 1.
The results are shown in Table 3.

[Example 9]
Polybutene (kinematic viscosity: 24000 mm ^{2 / s)} 80.93% by weight as a base oil, 6.9% by weight of oleic acid and 12% by weight of a C14-15 branched / linear alcohol mixture as an oily agent, and as a branched olefin polymer. A sample was prepared by mixing 0.07% by weight of polyisobutylene (average molecular weight 1.6 million) and 0.1% by weight of benzotriazole as a non-iron anticorrosive agent.
The obtained sample was evaluated by the same method as in Example 1.
The results are shown in Table 3.

[Comparative Example 1]
Samples were 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 by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 1 was inferior in stringiness. In addition, the slip distance was short, and seizure occurred.

[Comparative Example 2]
Samples were prepared in the same manner as in Example 1 except that the branched olefin polymer was not used.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 2 was inferior in stringability. In addition, the slip distance was short, and seizure occurred.

[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 processing of Patent Document 1.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 3 was inferior in stringability. In addition, the slip distance was short, and seizure occurred.

[Comparative Example 4]
Mineral oil (kinematic viscosity 480 mm ² / s) 9% by weight and polybutene (kinematic viscosity: 24000 mm ² / s) 70% by weight as base oil, and oleic acid 10% by weight and stearic acid butyl ester 10% by weight as oily agents. , As a lubricating additive, 1% by weight of carnauba wax was mixed to prepare a sample. In addition, this sample corresponds to one form of the aluminum tube drawing lubricating oil of Japanese Patent No. 4783026.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 4 was inferior in stringability. In addition, the slip distance was short, and seizure occurred.

[Comparative Example 5]
63% by weight of polybutene (kinematic viscosity: 2100 mm ² / s) as the base oil, 25% by weight of the branched alcohol mixture of C14 to C15 as the oiliness agent, and 12% by weight of polyisobutylene (average molecular weight 60,000) as the branched olefin polymer. And were mixed to prepare a sample. This sample has a form similar to that of the lubricating oil for steel pipe processing of Japanese Patent No. 4970777.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 5 was inferior in stringability. In addition, the slip distance was short, and seizure occurred.

[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. This sample has a form similar to that of the lubricating oil for drawing in Japanese Patent Application Laid-Open No. 11-209781.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 6 was inferior in stringability. In addition, the slip distance was short, and seizure occurred.

[Comparative Example 7]
A sample was prepared by mixing 70% by weight of zinc 2-ethylhexyldithiophosphate, which is a lubricating additive, with 30% by weight of a zinc salt of fatty acid. In addition, this sample corresponds to one form of the lubricating oil composition for plastic working of Japanese Patent No. 4560174.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
The sample of Comparative Example 7 was inferior in stringability. In addition, the slip distance was short, and seizure occurred.

[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 by the same method as in Example 1. The results are shown in Table 4.
In Comparative Example 8 as compared with Comparative Example 4, since polybutene having a high kinematic viscosity was used, the obtained sample also had a high kinematic viscosity, but there was no difference in stringiness. From this result, it can be seen that stringiness cannot be obtained by simply increasing the kinematic viscosity of the lubricant.

[Comparative Example 9]
Samples were 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 in Example 5. did.
The obtained sample was evaluated by the same method as in Example 1. The results are shown in Table 4.
In Comparative Example 9 in which the content of the branched olefin polymer was higher than that in Example 5, the slip distance was sufficiently long and no seizure was observed, but the stringiness was 45 cm. However, the sample tended to solidify into a jelly, and a decrease in liquid fluidity was observed. If the liquid fluidity decreases, it becomes difficult to clean the drawing lubricant and the workability decreases.

The materials listed in Tables 3 and 4 are shown below.
Mineral oil; mineral oil (kinematic viscosity 480 mm 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)
Oil-based agent A; Oleic acid oil-based agent B; Canola oil-based agent C; C14-15 branched linear alcohol mixture
Non-ferrous corrosion inhibitor; 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 oily agent D; Dimer acid oily agent E; Stearic acid butyl ester oily agent F; C14-15 branched alcohol mixture oily agent G; Capric acid lubricating additive A; Carnauba wax lubricating additive B; 2- Zinc Ethylhexyl Dithiophosphate Lubricating Additive C; Zinc Salt of Fatty Acid

1 Lubricant for drawing 2 Aluminum test plate 3 Support base 4 Cylindrical rod 5 Steel ball 6 Carbide die 7 Non-ferrous metal thin wire W Load

Claims (3)

A lubricant for extracting non-ferrous metals containing a base oil and a branched olefin polymer.
The branched olefin polymer is polyisobutylene, polyisoprene, ethylene - propylene copolymer, and styrene - Ri least one Der selected from the group consisting of butadiene copolymers,
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 the cylindrical rod is pulled up vertically from the liquid surface at a speed of 0.5 m / min. Note: The amount of elongation of the liquid column at the break point is 4 to 40 cm.
The kinematic viscosity of the drawing lubricant at 40 ° C. is 500 to 5000 mm ² / s.
In the total of the base oil, oiliness agent, and branched olefin polymer,
A lubricant for drawing out non-ferrous metals, wherein the content of the branched olefin polymer is 0.0001% by weight to 20% by weight, and the average molecular weight of the branched olefin polymer is 100,000 to 3,000,000. .. The lubricant for extracting nonferrous metals according to claim 1, further comprising at least one oily agent selected from the group consisting of esters, alcohols and carboxylic acids. The lubricant for drawing out a non-ferrous metal according to claim 1 or 2, wherein the branched olefin polymer is polyisobutylene.

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