JP4290504B2 - Processing oil for aluminum plate and aluminum plate coated with the same - Google Patents

Description

  The present invention relates to an aluminum plate processing oil used for processing an aluminum plate and an aluminum plate coated with the same.

  Generally, when metal processing such as press processing or fin processing for air conditioners is performed on aluminum plates used for automobile parts and home appliances, mineral oil is used as a base oil, and various oil-based agents and rust preventive agents are contained. Supply of metalworking oil is performed. Thereafter, a degreasing process is performed to remove the metal processing oil on the surface of the aluminum plate. Further, the processed aluminum plate is subjected to processing such as welding and painting.

So far, as the metal working oil and the metal working method as described above, for example, techniques described in Patent Documents 1 to 5 below have been proposed.
In such a conventional metalworking oil, the composition has been determined so as to achieve both lubricity and degreasing properties. In general, in order to improve the lubricity, the viscosity of the base oil is increased, or an oily agent having adsorption activity or an oily agent having a large number of carbon atoms is contained.

However, when the lubricity is improved, the oil agent tends to be adsorbed on the surface of the aluminum plate, and the degreasing property tends to be inferior. That is, lubricity and degreasing are in a trade-off relationship.
Furthermore, when the lubricity is improved, the freezing point temperature tends to increase. As a result, at the time of mass production at a manufacturing plant, there has been a problem that the metalworking oil is solidified at a low temperature of, for example, 0 ° C. or lower in winter. For this reason, there is a possibility that the oil supply workability and the oil coating stability when supplying the metal working oil to the aluminum plate and applying it are lowered, and the productivity is hindered.

  Moreover, after an aluminum plate is manufactured by rolling and until metal processing, such as a press, is performed, it is generally conveyed in the shape of a coil or a cut plate. At that time, the metal working oil is often applied after aluminum is rolled or before cut plate packaging. At this time, the metalworking oil can exhibit an effect of preventing abrasion between the aluminum plates that are overlapped during conveyance (during conveyance) and causing scratches on the aluminum plates.

On the other hand, however, in the conventional metalworking oil, when the temperature becomes low, for example, 0 ° C. or less during transportation, there is a problem that the oil is solidified and the aluminum plates are fixed to each other. It was.
Japanese Patent Laid-Open No. 5-98274 JP-A-4-20598 JP-A-8-337787 JP-A-4-228228 JP-A-1-153793

  The present invention has been made in view of such conventional problems, and can sufficiently reduce the friction between the aluminum plate and the tool during molding, can easily perform degreasing after molding, and can also solidify even at low temperatures. It is an object of the present invention to provide a processing oil for an aluminum plate that is difficult to perform and an aluminum plate coated with the processing oil.

1st invention contains 5.0-10.0 weight part of ester, 5.0-10.0 weight part of fatty acids, and 100 weight part of alpha olefin,
The α-olefin is a processing oil for an aluminum plate characterized by comprising 40 to 50 parts by weight of an α-olefin having 14 carbon atoms and 60 to 50 parts by weight of an α-olefin having 16 and 18 carbon atoms. (Claim 1).

The most notable point in the present invention is that α-olefins containing 14, 16, and 18 carbon atoms are combined in specific amounts.
That is, in the processing oil for an aluminum plate of the present invention, the amount of α-olefin having 14 carbon atoms is minimized, and the α-olefin having 16 and 18 carbon atoms is contained. Moreover, the lack of lubricity which may be caused by reducing the α-olefin having 14 carbon atoms is eliminated by containing a specific amount of esters and fatty acids as described above.
Therefore, in the processing oil for aluminum plates of the present invention, the freezing point can be made extremely low without deteriorating the lubricity during molding and the degreasing property during degreasing. Therefore, the processing oil for an aluminum plate is difficult to solidify even at a low temperature of 0 ° C., for example, and is easy to handle and excellent in workability even in such a low temperature environment.

  As described above, according to the present invention, the friction between the aluminum plate and the tool at the time of forming can be sufficiently reduced, the degreasing after forming can be easily performed, and the processing oil for aluminum plate that is difficult to solidify even at low temperatures. Can be provided.

A second invention is an aluminum plate characterized in that 300 to 1500 mg / m ^{2 of the} processing oil for aluminum plate of the first invention is applied to the surface (invention 3).

In the aluminum plate, a specific amount of the processing oil for aluminum plate of the invention of the first invention (invention 1) is applied.
Therefore, taking advantage of the excellent lubricity and degreasing properties of the processing oil for the aluminum plate, the aluminum plate is excellent in lubricity with the tool and can be easily molded, and can be easily degreased after molding. It becomes.

Moreover, as described above, the processing oil for aluminum plate has a very low freezing point.
Therefore, in the aluminum plate of the present invention, the applied processing oil for the aluminum plate can be prevented from solidifying even when placed in a low temperature environment such as in winter or in a cold region. Therefore, even when the aluminum plates overlap each other during transportation or the like, it is possible to avoid a problem that they are fixed to each other, and work efficiency at the time of forming the aluminum plate is improved.
The aluminum plate is a concept including not only pure aluminum but also an aluminum plate made of an aluminum alloy.

In this invention, the said processing oil for aluminum plates contains ester, a fatty acid, and an alpha olefin as an oil-based agent.
As said ester, 1 or more types chosen from natural fats and oils, synthetic ester, fatty acid ester, etc. can be used, for example.
Examples of natural fats and oils include soybean oil, rapeseed oil, palm oil, coconut oil, lard and beef tallow. Among these, palm oil and palm oil are preferable from the viewpoint of operability.

  As the esters, for example, one or more selected from neopentyl glycol ester, trimethylol propane ester, pentaerythritol ester and the like can be used. The fatty acids constituting these esters may be linear or branched. The ester may be either a full ester or a partial ester.

Specific examples of the neopentyl glycol ester include neopentyl glycol capric acid monoester, neopentyl glycol capric acid diester, neopentyl glycol ester, neopentyl glycol linolenic acid monoester, neopentyl glycol linolenic acid diester, Neopentyl glycol stearic acid monoester, neopentyl glycol stearic acid diester, neopentyl glycol oleic acid monoester, neopentyl glycol oleic acid diester neopentyl glycol ester, neopentyl glycol isostearic acid monoester, neopentyl glycol isostearic acid diester, neo Pentyl glycol palm oil fatty acid monoester, neopentyl glycol palm Fatty acid diester, neopentyl glycol beef tallow fatty acid monoester, neopentyl glycol beef tallow fatty acid diester, neopentyl glycol palm oil fatty acid monoester, neopentyl glycol palm oil fatty acid diester neopentyl glycol ester, 2 moles neopentyl glycol and 1 mole dimer acid There are complex esters of 2 moles of oleic acid.
Of these, oleic acid, isostearic acid, coconut oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

  Examples of the trimethylolpropane ester include trimethylolpropane capric acid monoester, trimethylolpropane capric acid diester, trimethylolpropane capric acid triester, trimethylolpropane linolenic acid monoester, trimethylolpropane linolenic acid diester, and trimethylol. Propanelinolenic acid triester, trimethylolpropane stearic acid monoester, trimethylolpropane stearic acid diester, trimethylolpropane stearic acid triester, trimethylolpropane oleic acid monoester, trimethylolpropane oleic acid diester, trimethylolpropane oleic acid triester Esters, trimethylolpropane isostearic acid monoester, trimethylo Propane isostearic acid diester, trimethylolpropane isostearic acid triester, trimethylolpropane palm oil fatty acid monoester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane palm oil fatty acid triester, trimethylolpropane beef tallow fatty acid monoester, Trimethylolpropane beef tallow fatty acid diester, trimethylolpropane beef tallow fatty acid triester, trimethylolpropane palm oil fatty acid monoester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane palm oil fatty acid diester, trimethylolpropane 2 mol dimer acid 1 There are complex esters of 4 mol of oleic acid. Of these, oleic acid, isostearic acid, coconut oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

  Examples of pentaerythritol include pentaerythritol capric acid monoester, pentaerythritol capric acid diester, pentaerythritol capric acid triester, pentaerythritol capric acid tetraester, pentaerythritol linolenic acid monoester, pentaerythritol linolenic acid diester, pentaerythritol. Linolenic acid triester, pentaerythritol linolenic acid tetraester, pentaerythritol stearate monoester, pentaerythritol stearate diester, pentaerythritol stearate triester, pentaerythritol stearate tetraester, pentaerythritol oleate monoester, pentaerythritol oleate Diester, pe Taerythritol oleic acid triester, pentaerythritol oleic acid tetraester, pentaerythritol isostearic acid monoester, pentaerythritol isostearic acid diester, pentaerythritol isostearic acid triester, pentaerythritol isostearic acid tetraester, pentaerythritol palm oil fatty acid monoester, Pentaerythritol Palm Oil Fatty Acid Diester, Pentaerythritol Palm Oil Fatty Acid Triester, Pentaerythritol Palm Oil Fatty Acid Tetraester, Pentaerythritol Beef Fatty Acid Monoester, Pentaerythritol Beef Fatty Acid Diester, Pentaerythritol Beef Fatty Acid Triester, Pentaerythritol Beef Fatty Acid Tetraester, pentaerythrito Palm oil fatty acid monoester, pentaerythritol palm oil fatty acid diester, pentaerythritol palm oil fatty acid triester, pentaerythritol palm oil fatty acid tetraester, 2 mol of trimethylolpropane, 1 mol of dimer acid, 6 mol of oleic acid, etc. . Of these, oleic acid, isostearic acid, coconut oil fatty acid, and beef tallow fatty acid esters are particularly preferable.

The esters preferably have 12 to 18 carbon atoms.
When the number of carbon atoms is less than 12, the boundary lubricity of the aluminum plate working oil may be deteriorated. Therefore, when the aluminum plate coated with the processing oil for aluminum plate is formed by pressing or the like, the aluminum plate may be easily damaged. On the other hand, when the number of carbons exceeds 18, it becomes difficult to remove the processing oil for the aluminum plate from the aluminum plate by washing after molding with a press or the like, and there is a lot of the processing oil for the aluminum plate on the surface of the aluminum plate. There is a risk of remaining. As a result, there is a risk of adversely affecting welding or painting performed after cleaning. In this case, the viscosity of the processing oil for the aluminum plate is increased, making it difficult to handle, and the freezing point is increased, so that the processing oil for the aluminum plate may be solidified in a low temperature environment.

Moreover, the said processing oil for aluminum plates contains 5.0-10.0 weight part of said ester.
When the ester content is less than 5.0 parts by weight, the lubricity of the aluminum plate processing oil may be reduced. On the other hand, when it exceeds 10.0 parts by weight, the degreasing property may be deteriorated.

Next, in the present invention, examples of the fatty acids include linear saturated acids such as capric acid, undecanoic acid, lauric acid, tridecanoic acid, demisteric acid, pentadecanoic acid, palmitic acid, margaric acid, stearic acid, behenic acid, and the like. There are unsaturated fatty acids such as palmitoleic acid, oleic acid, linoleic acid, linolenic acid, ricinoleic acid.
Preferably, lauric acid, myristic acid, palmitic acid, oleic acid and the like are preferable in consideration of lubricity, workability, long-term stability and cost.

  Moreover, as said fatty acid, a C1-C18 thing is preferable. When the number of carbon atoms of the fatty acid is less than 10, the lubricity of the aluminum plate processing oil may be deteriorated. On the other hand, when it exceeds 18, it becomes difficult to remove the processing oil for the aluminum plate from the aluminum plate by cleaning, and there is a possibility that a large amount of the processing oil for the aluminum plate remains on the surface of the aluminum plate after the cleaning. .

Moreover, the said processing oil for aluminum plates contains said fatty acid 5.0-10.0 weight part.
If the fatty acid content is less than 5.0, the lubricity of the aluminum plate processing oil may be reduced. On the other hand, when it exceeds 10.0 parts by weight, the degreasing property may be deteriorated.

  Moreover, the said processing oil for aluminum plates contains 40-50 weight part of C14 alpha olefins, and contains 60-50 weight part of C16 and 18 alpha olefins. However, the total amount of the α-olefin having 14 carbon atoms and the α-olefin having 16 and 18 carbon atoms is 100 parts by weight.

  When the content of α-olefin having 14 carbon atoms is less than 40 parts by weight, or when the content of α-olefin having 16 and 18 carbon atoms exceeds 60 parts by weight, the processing oil for aluminum plate is, for example, 0 It becomes easy to solidify in a low temperature environment such as ° C., and the workability in a low temperature environment may be deteriorated. On the other hand, when the content of α-olefin having 14 carbon atoms exceeds 50 parts by weight, or when the content of α-olefin having 16 and 18 carbon atoms is less than 50 parts by weight, Lubricity may be reduced.

In the present invention, the content of the α-olefin having 16 and 18 carbon atoms is the total amount of the α-olefin having 16 carbon atoms and the α-olefin having 18 carbon atoms, and is within the above range. More preferably, the α-olefin having 16 carbon atoms and the α-olefin having 18 carbon atoms are preferably contained in a weight ratio of 40:60 to 50:50.
When the weight ratio of the α-olefin having 16 carbon atoms and the α-olefin having 18 carbon atoms is out of the above range, the lubricity of the aluminum plate working oil may be deteriorated. In addition, a large amount of the processing oil for the aluminum plate may remain on the surface of the aluminum plate after cleaning.

In addition to the α-olefin, esters, and fatty acids, the processing oil for aluminum plate includes, for example, antioxidants, carboxylic acids, carboxylates, alkenyl succinate amino derivatives, sulfonates as other components. , Alcohol, amines, and the like.
In this case, the content of other components is preferably 2 parts by weight or less with respect to 100 parts by weight of the processing oil for aluminum plate. When the other component exceeds 2 parts by weight, the lubricity of the aluminum plate working oil, particularly the boundary lubricity, may be adversely affected.

Moreover, it is preferable that the freezing point of the said processing oil for aluminum plates is -3 degrees C or less (Claim 2).
In this case, the processing oil for an aluminum plate is more difficult to solidify in a low temperature environment, so that workability in a low temperature environment can be further improved.

Next, in the aluminum plate of the second invention (Invention 3), the processing oil for aluminum plate is applied at 300 to 1500 mg / m ² .
When the coating amount of the processing oil for aluminum plate is less than 300 mg / m ² , the lubricity between the aluminum plate and the tool may be deteriorated. On the other hand, when it exceeds 1500 mg / m ² , the degreasing property is lowered, and the processing oil for the aluminum plate may be solidified at a low temperature.
Moreover, since the said processing oil for aluminum plates can show the stable lubricity also in a thin film, even if the application quantity is 300-1000 mg / m < ² >, sufficient effect can be exhibited.

Next, examples of the present invention will be described.
In this example, the processing oil for aluminum plates is prepared, the processing oil for aluminum plates is apply | coated to an aluminum plate, and the evaluation is performed.
The processing oil for aluminum plates of this example contains 5.0 to 10.0 parts by weight of esters, 5.0 to 10.0 parts by weight of fatty acid, and 100 parts by weight of α-olefin. The α-olefin is composed of 40 to 50 parts by weight of an α-olefin having 14 carbon atoms and 60 to 50 parts by weight of an α-olefin having 16 and 18 carbon atoms (provided that the α-olefin having 14 carbon atoms and the number of carbon atoms are The total amount of 16 and 18 α-olefins is 100 parts by weight).

  In this example, as shown in Table 1 to be described later, a plurality of processing oils for aluminum plates having different types and amounts of esters, fatty acids, and α-olefins were prepared. These aluminum plate processing oils contain 1-tetradecene having 14 carbon atoms, 1-hexadecene having 16 carbon atoms, and 1-octadecene having 18 carbon atoms as α-olefins, and as esters, Contains pentaerythritol oleic acid full ester (PET) having 18 carbon atoms or neopentyl glycol ester lauric acid full ester having 12 carbon atoms, and contains oleic acid having 18 carbon atoms or lauric acid having 12 carbon atoms as fatty acid To do. In Table 1, the types of α-olefin and fatty acid are represented by the number of carbon atoms. The contents of the α-olefin having 16 carbon atoms and the α-olefin having 18 carbon atoms are represented by the total amount.

Next, the aluminum plate processing oil prepared above was applied to the aluminum alloy plate material conforming to JIS 5182 having a plate thickness of 1 mm, a width of 10 mm, and a length of 200 mm to obtain 15 types of aluminum plates. It was. These were designated as Sample E1 to Sample E7 and Sample C1 to Sample C7. Table 1 shows the composition of the processing oil for aluminum plate used for each of Sample E1 to Sample E7 and Sample C1 to Sample C7, and the amount applied to the aluminum plate.
In addition, in the aluminum plate of each sample, the processing oil for aluminum plate forms a film, and this film is hereinafter referred to as a lubrication film as appropriate.

  The composition of the processing oil for aluminum plate, that is, the carbon number and content of α-olefin, esters, and fatty acids contained in the processing oil for aluminum plate are the carbon number and addition of each component used in the production. You can know from the quantity. The above processing oil for aluminum plate is analyzed by gas chromatography, infrared spectrophotometry, gas chromatogram-mass spectrometry (GC-MS), gas chromatogram-infrared spectrophotometry (GC-FTIR), and quantified. You can also Moreover, said analysis can be performed and quantified about the said lubricating treatment film | membrane after apply | coating to an aluminum plate.

Next, the following evaluation was performed about the aluminum plate of the said sample E1-sample E7 and the sample C1-sample C8, and the processing oil for aluminum plates apply | coated to each sample.
"Lubricity"
The lubricity was evaluated by measuring the friction coefficient of each sample.
About each sample, the drawing experiment of 5% of plate | board thickness reduction | decrease rates was done with the flat plate die. At that time, the ratio between the pulling force and the die separating force was determined, and this was defined as the coefficient of friction, which was used as an index of lubricity. The results are shown in Table 2 below.

"Degreasing"
Each sample was degreased for 2 minutes in a solution of 2% sodium orthosilicate at a temperature of 50 ° C. Then, it washed with water and investigated the water wet area after water washing. The degreasing property was represented by the ratio (%) of the wetted area to the area of the portion coated with the aluminum plate processing oil in each sample. The results are shown in Table 2 below.

"Workability"
The aluminum plate processing oil applied to each sample is placed in a beaker and immersed in ice water at 0 ° C., and the case where the aluminum plate processing oil does not solidify is evaluated as ◯, and the case where it solidifies is evaluated as x. did.
Moreover, the temperature of the beaker containing the processing oil for aluminum plates was lowered to −3 ° C., and the freezing point of the processing oil for aluminum plates was examined. The freezing point was expressed as “exceeding −3 ° C.” when solidified at a temperature of −3 ° C., and expressed as “below −3 ° C.” when not solidifying. The results are shown in Table 2 below.

  Moreover, from the results of the above-described lubricity, degreasing properties, and workability, each sample and the processing oil for aluminum plate applied to each sample were comprehensively evaluated. As the evaluation criteria, the lubricity (coefficient of friction) is less than 0.2, the degreasing property (water wetting area) is 90% or more, and it does not solidify at 0 ° C. The case where even one was not satisfied was evaluated as a failure. The results are shown in Table 2 below.

  As is known from Table 2, all of the samples E1 to E7 according to the examples of the present invention have a friction coefficient of less than 0.2, a degreasing property (water wetting area) of 90% or more, and solidify at 0 ° C. Without fail, all the evaluations showed good results.

On the other hand, sample C1 having a large ratio of 16-carbon and 18-α-olefins solidified at 0 ° C., and there was a problem in workability.
Sample C2, which has a low ratio of 16-carbon and 18-carbon α-olefins, had a high friction coefficient of 0.2 and had a problem in lubricity.

Further, the sample C3 having a high fatty acid content had a high friction coefficient of 0.2 and had a problem in lubricity. Sample 3 had a small water-wetting area after degreasing of 85%, and had a problem with degreasing properties.
Sample C4 with a low fatty acid content had a high coefficient of friction of 0.22 and had a problem with lubricity.
Sample C5 having a high ester content had a problem of degreasing because the water-wetting area after degreasing was as small as 85%.
Sample C6 with a low ester content had a high friction coefficient of 0.22 and had a problem with lubricity.

Further, the sample C7 having a small coating amount of the processing oil for the aluminum plate had a large friction coefficient of 0.3 and had a problem in lubricity.
Further, Sample C8 having a large amount of aluminum plate processing oil applied had a problem of degreasing because the wetted area after degreasing was as small as 85%.

  As described above, according to this example, the processing oil for an aluminum plate according to the example of the present invention and the aluminum plate (sample E1 to sample E7) coated with the oil have sufficient friction between the aluminum plate and the tool during molding. It can be seen that it is easy to degrease after molding, and it is difficult to solidify even at low temperatures.

Claims (3)

5.0 to 10.0 parts by weight of esters, 5.0 to 10.0 parts by weight of fatty acid, and 100 parts by weight of α-olefin,
The α-olefin is composed of 40 to 50 parts by weight of an α-olefin having 14 carbon atoms and 60 to 50 parts by weight of an α-olefin having 16 and 18 carbon atoms.   In Claim 1, The freezing point of the said processing oil for aluminum plates is -3 degrees C or less, The processing oil for aluminum plates characterized by the above-mentioned. An aluminum plate, wherein 300 to 1500 mg / m ^{2 of the} processing oil for aluminum plate according to claim 1 or 2 is applied to the surface.