JPH0420598A - Oil and process for metal working - Google Patents

Abstract

PURPOSE:To obtain a metal working oil with a high workability, excellent degreasing characteristic and no toxicity by blending a base material containing a specific straight chain olefin with a specific emulsifier. CONSTITUTION:A metal working oil formed by blending a base material containing a C6-40 straight chain olefin with an emulsifier selected from an alkylene oxide aduct of a polyhydric alcohol fatty acid ester, an alkylene oxide aduct of an C8-30 fatty acid, an alkylene oxide aduct of a C4-36 polycarboxylic acid, an alkali soap of an C8-30 fatty acid, an alkali soap of a C4-36 polycarboxylic acid, an amine soap of an C8-30 fatty acid, and an amine soap of a C4-36 polycarboxylic acid. The metal working is carried out by feeding continuously or intermittently the oil as it is or as a water dispersion thereof to the working part of a metal (alloy) material to be worked, thereby working the material, and then washing the same with water.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal working fluid and a metal working method, and more specifically, a metal working fluid with high processing performance and excellent degreasing properties, and efficient metal processing using the same. Regarding processing methods.

[Prior art and problems to be solved by the invention] In general, processing of cans (for example, processing of aluminum cans), fin processing (for example, processing of aluminum fins for air conditioners), etc.
In various types of metal processing, metal processing is carried out by applying an oil containing an oily agent to mineral oil, followed by degreasing, and then applying various surface finishes.

In this case, processability is often insufficient, and due to poor degreasing properties, for example, in the case of air conditioner fins, the heat exchange efficiency may decrease, or in the case of can processing, the subsequent surface finish may be poor. (There are many cases where this is not possible.

Therefore, the present inventors have solved the drawbacks of the conventional oil agents mentioned above, and have developed a product that has high processability and good degreasability (water washability).
In addition, we conducted extensive research to develop non-toxic metalworking fluids and effective metalworking methods using them.

[Means for Solving the Problem] As a result, metal processing is achieved by blending a specific alkylene oxide adduct, an emulsifier such as an alkali soap or an amine soap into a base material containing a linear olefin having 6 to 40 carbon atoms. It has been found that an oil agent is suitable for the above purpose. The present invention was completed based on this knowledge.

That is, the present invention provides a base material containing a linear olefin having 6 to 40 carbon atoms, (1) an alkylene oxide adduct of a polyhydric alcohol fatty acid ester, and (2) a base material having 8 to 30 carbon atoms.
alkylene oxide adducts of fatty acids of (3) alkylene oxide adducts of polycarboxylic acids having 4 to 36 carbon atoms, (4) alkaline soaps of fatty acids having 8 to 30 carbon atoms, (
5) Alkaline soap of polyhydric carboxylic acid having 4 to 36 carbon atoms,
(6) Amine soap of fatty acid having 8 to 30 carbon atoms and (7)
The present invention provides a metal working fluid containing one or more emulsifiers selected from the group consisting of amine soaps of polyhydric carboxylic acids having 4 to 36 carbon atoms. Further, the present invention
The present invention also provides a metal working method, which comprises supplying the metal working oil or an aqueous dispersion of the oil to a metal material to be processed, and then washing the metal material with water.

The base material of the metal working fluid of the present invention contains a straight chain olefin having 6 to 40 carbon atoms. Straight chain olefins having less than 6 carbon atoms are not suitable because of their low flash points. Moreover, those having more than 40 carbon atoms are difficult to use because they become solid, and are also difficult to mix and dissolve with mineral oil, synthetic oil, other additives, etc., making them unsuitable. Furthermore, those having more than 40 carbon atoms are not common and difficult to obtain.

Among these linear olefins, compounds having one double bond in the molecule and having 6 to 30 carbon atoms are preferred, and in particular, α-olefins having 8 to 30 carbon atoms (i.e., n-α-olefins) are preferable. ) is optimal.

Specific examples of these linear olefins include 1-octene, 1-decene, 1-dodecene, 1-butrabcene, 1-
Examples include hexadecene, 21-octadecene, -eicosene, and mixtures thereof. These linear olefins can be obtained by various production methods, and for example, ethylene oligomers obtained by polymerizing ethylene by conventional means can be used.

By the way, in the present invention, the above-mentioned linear olefin may be used alone as a base material, but mineral oil and/or synthetic oil may also be used together with it. Furthermore, water can also be mixed. The mineral oil or synthetic oil blended here usually has a kinematic viscosity of 0.5 to 500 cSt at 40°C.
In particular, 0.5 to 30C8tO is preferably used. Among these, various mineral oils can be mentioned,
For example, distillate oil obtained by atmospheric distillation of paraffinic crude oil, intermediate crude oil, or naphthenic crude oil, or by distilling the residual oil of atmospheric distillation under reduced pressure, or by refining this according to a conventional method. The resulting refined oils include, for example, solvent-refined oils, hydrogenated refined oils, dewaxed oils, clay-treated oils, and the like.

When these mineral oils are blended with the above-mentioned linear olefin, the resulting metal working fluid has improved oxidation stability.

Further, as the synthetic oil, olefins other than the above-mentioned linear olefins (for example, branched olefins such as polybutene and polypropylene), hydrogenated products of these olefins, etc. can be used. Particularly preferred are low molecular weight polybutene, low molecular weight polypropylene, and α-olefin oligomers having 8 to 14 carbon atoms. When these synthetic oils are blended with the above-mentioned linear olefin, the resulting metal processing fluid emits less odor during use, improves the working environment, and further improves the degreasing properties of the surface of processed products.

When mineral oil or synthetic oil is mixed with the linear olefin as the base material, the mixing ratio is not particularly limited, but usually the linear olefin is 3% by weight or more, preferably 5% by weight or more, especially 5% by weight or more. ~70% by weight, mineral oil and/or synthetic oil at 97% by weight or less, preferably 95% by weight or less, especially 95-30% by weight.

Note that when water is used instead of mineral oil or synthetic oil, an emulsion-type metalworking fluid in which linear olefins are dispersed in water can be obtained, and this can also be used in the present invention.

Next, as the emulsifier used in the metal working fluid of the present invention,
(1) alkylene oxide adduct of polyhydric alcohol fatty acid ester, (2) alkylene oxide adduct of fatty acid having 8 to 30 carbon atoms, (3) alkylene oxide adduct of polyhydric carboxylic acid having 4 to 36 carbon atoms, ( 4) Alkaline soap of fatty acid with 8 to 30 carbon atoms, (5) 4 to 30 carbon atoms
Alkaline soap of 36 polyhydric carboxylic acids, (6) carbon number 8
Amine soap with ~30 fatty acids or (7) carbon number ~4
There are 36 polyhydric carboxylic acid amine soaps, and one of these may be used alone or two or more may be used in combination.

Here (1) There are various alkylene oxide adducts of polyhydric alcohol fatty acid esters, but they usually have 2 to 602 carbon atoms to a hexavalent alcohol with 8 to 30 carbon atoms.
An ester of a fatty acid with an alkylene oxide having 2 to 4 carbon atoms, such as an ethylene oxide adduct of sorbitan monooleate, an ethylene oxide adduct of sorbitan monostearate, an ethylene oxide adduct of sorbitan monostearate, Ethylene oxide adducts of sorbitan monolaurate, and ethylene oxide' adducts of these di- or triesters (
(e.g., ethylene oxide adducts of sorbitan dioleate, ethylene oxide adducts of sorbitan monooleate, etc.), and alkylene oxides of fatty acid esters of sorbitan, such as ethylene oxide/propylene oxide adducts of these mono-, di-, or triesters. Adducts may be mentioned as suitable. Further examples include alkylene oxide adducts of pentaerythritol fatty acid esters, alkylene oxide adducts of glycerin fatty acid esters, and alkylene oxide adducts of glycol fatty acid esters.

(2) The alkylene oxide adduct of a fatty acid having 8 to 30 carbon atoms is an alkylene oxide adduct of the fatty acid having 8 to 30 carbon atoms, such as alkylene oxide adducts of lauric acid, myristic acid, stearic acid, oleic acid, etc. can be cited as suitable.

(3) As an alkylene oxide adduct of a polyvalent carboxylic acid having 4 to 36 carbon atoms, the polyvalent carboxylic acid has 2 carbon atoms.
-4 alkylene oxide adducts, such as adipic acid, cehatic acid, dodecandioic acid.

Suitable examples include alkylene oxide adducts such as dimer acids.

(4) Examples of alkaline soaps of fatty acids having 8 to 30 carbon atoms include sodium or potassium soaps (salts) such as lauric acid, myristic acid, stearic acid, and oleic acid.

(5) Examples of alkaline soaps of polyhydric carboxylic acids having 4 to 36 carbon atoms include adipic acid and cehatic acid.

There are sodium or potassium soaps (salts) such as dodecanoic acid and dimer acid.

(6) For amine soaps of fatty acids with 8 to 30 carbon atoms,
There are salts of fatty acids having 8 to 30 carbon atoms and amines having 1 to 6 carbon atoms, such as mono(di- or tri)ethanolamine soaps (salts) such as lauric acid, myristic acid, stearic acid, pentaoleic acid, and the like.

Furthermore, (7) amine soaps of polyhydric carboxylic acids having 4 to 36 carbon atoms include, for example, mono(di- or tri)ethanolamine soaps (salts) such as adipic acid, cehatic acid, dodecanoic acid, and dimer acid.

In the present invention, any one of these (1) to (7)
species or a combination of two or more species, for example (
In the case of the alkylene oxide adducts of 1) and (2), the HLB (hydrophilic-lipophilic balance) ratio is between 5 and 1.
5 is preferable; if it is less than 5, the cleaning performance may be poor, and if it is more than 15, there is a risk of separation from the above-mentioned base material.

In the metalworking fluid of the present invention, the blending ratio of the emulsifier is not particularly limited, but it is usually 1 to 1 to 1% of the total fluid.
It is selected in a range of 50% by weight, preferably 2 to 30% by weight. If the blending ratio of the emulsifier is less than 1% by weight, the cleaning performance will be insufficient, and if it exceeds 50% by weight,
There is a possibility that the processability will be inferior.

The metalworking fluid of the present invention is composed of the above-mentioned base material mixed with an emulsifier, and, if desired, various additives such as an antioxidant, a corrosion inhibitor, an extreme pressure oil agent, a rust preventive, etc.
It can also be added as appropriate in a range of 0% by weight or less.

On the other hand, the metal processing method of the present invention continuously or intermittently supplies the metal processing fluid as it is or an aqueous dispersion of the same in water to the processing portion of the metal (alloy) material to be processed. This is done by processing and then washing with water. Alternatively, a method may be employed in which the metal material is coated with or dipped in the metal processing oil (or its aqueous dispersion) in advance, the metal material is further supplied with the metal processing oil, the metal material is processed, and then the material is washed with water. Or, after applying metal processing fluid to the metal material,
A method may also be used in which an aqueous dispersion (emulsion) of the oil agent is supplied and then washed with water. Note that for this washing, it is effective to use not only water but also an alkaline aqueous solution.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples.

Example 1 (Aluminum fin processing experiment) An aluminum plate (A
1200) was subjected to so-called drawless type processing to continuously form aluminum fins for room air conditioners. That is, after immersing an aluminum plate in an oil solution, it was subjected to piercing, burring, ironing, and reflaring. The ironing conditions here are as follows.

Punch (carbide) outer diameter 9.86mm Die (carbide) inner diameter 9.98Peng fin pitch 1.8TMn Ironing rate 54% Also, during the ironing process, metal processing oil (linear-1-olefin (C .
and 1.5% by weight of an ethylene oxide adduct of sorbitan monolaurate (HLB value 13.5) was applied by spray coating.

In the continuous machining, 32 holes were machined in one row, and the machining speed was 250 strokes/min and 100,000 strokes.

After this processing, washing with water was performed. For washing, a set of 70x50 aluminum fins (100 sheets) was immersed in a water tank with a volume of 1 ton for 5 minutes, and then the final washing was performed for 1 minute in a water finishing tank (volume of 1 ton). This was further carried out by hot air drying.

A part (flat part) of the obtained cent was cut out and the contact angle of water droplets was measured. The results are shown in Table 1.

Note that the smaller the contact angle, the better the cleaning performance, and usually the contact angle is preferably 5° or less.

If the cleaning performance is poor, the heat exchange efficiency will be reduced.

Example 2 An aluminum fin processing experiment was conducted in the same manner as in Example 1, except that the base material of Example 1 mixed with 10% by weight of potassium oleate was used as the metal processing fluid.

The results are shown in Table 1.

Comparative Example 1 An aluminum fin processing experiment was carried out in the same manner as in Example 1, except that the metal processing fluid made of only the base material of Example 1 was used.

The results are shown in Table 1.

Comparative Example 2 As a metalworking fluid, polyoxyethylene nonylphenyl ether (HLB value! 2) was added to the base material of Example 1 at 6.5
An aluminum fin processing experiment was carried out in the same manner as in Example 1, except that a mixture of % by weight was used.

The results are shown in Table 1.

Comparative Example 3 Except for using the base material of Example 1 mixed with 10% by weight of petroleum Na sulfonate as a metalworking fluid.
An aluminum fin processing experiment was conducted in the same manner as in Example 1.

The results are shown in Table 1.

Table 1 [Effects of the Invention] As described above, by using the metal processing fluid of the present invention, various metal materials can be processed with good degreasing properties (washability), non-toxicity, safety, and high processing performance. It can be performed.

Processed products obtained by the method of the present invention include aluminum fins, +f1 disks, video disks,
There are various things including VTR drums, and therefore,
The metal working fluid and method of the present invention can be effectively and widely used in metal working in various fields.

Patent applicant: Idemitsu Kosan Co., Ltd. Agent Patent Attorney Tamotsu Otani

Claims (2)

[Claims] (1) A base material containing a linear olefin having 6 to 40 carbon atoms, (1) an alkylene oxide adduct of a polyhydric alcohol fatty acid ester, (2) an alkylene oxide adduct of a fatty acid having 8 to 30 carbon atoms, ( 3) Alkylene oxide adduct of polycarboxylic acid having 4 to 36 carbon atoms, (4) Alkaline soap of fatty acid having 8 to 30 carbon atoms, (5) 4 carbon atoms
-36 polyhydric carboxylic acid alkaline soaps, (6) C8-30 fatty acid amine soaps, and (7) C4-3 carbon atoms.
6. A metal working oil containing one or more emulsifiers selected from the group consisting of amine soaps of polyhydric carboxylic acids. (2) A metal working method, which comprises supplying the metal working oil or an aqueous dispersion of the oil according to claim 1 to a working part of a metal material, and then washing the metal material with water.