WO1991018074A1

WO1991018074A1 - Lubricant composition for metal working

Info

Publication number: WO1991018074A1
Application number: PCT/JP1991/000534
Authority: WO
Inventors: Saburo Koyama; Yasunori Tomari; Seiichi Shido; Toshio Saito
Original assignee: Idemitsu Kosan Co., Ltd.
Priority date: 1990-05-14
Filing date: 1991-04-23
Publication date: 1991-11-28
Also published as: KR970010855B1; EP0484542A4; EP0484542B1; EP0484542A1; DE69114672D1; DE69114672T2; KR927003454A

Abstract

A lubricant composition for metal working, which comprises: (a) a base oil mainly comprising C6? to C40? normal olefin, (b) at least one compound selected from among alcohol, glycol, polyalkylene glycol and its derivative and fatty acid, and/or (c) at least one compound selected between phenol and amine. The use of this composition serves to smooth plastic working, machining, or grinding of various metals and alloys.

Description

Specification

Lubricating oil composition for metalworking

Technical field

The present invention relates to a lubricating oil composition for metalworking, and more particularly, to a lubricating oil composition containing a specific straight-chain or alcohol and the like, and particularly to aluminum and its alloys. The present invention relates to a lubricating oil composition that is excellent in cleaning (removability) of wear powder generated during metal working.

Background art

In general, when a linear mono-alpha olefin is used as a lubricant during metal forming such as plastic working (rolling and drawing) and cutting, grinding, etc., the surface of the workpiece after processing is used. Processing powder (abrasion powder) adheres to the surface of the product, deteriorating the quality of processed products and adversely affecting the next process.

For example, when rolling an aluminum plate in a direct α-year-old fin, aluminum wear powder adheres to the rolled plate, and when it is annealed as it is, the annealed muller writes. No. In addition, when aluminum foil is rolled using a linear α-year-old fin, pinholes may be formed in the aluminum foil itself due to abrasion powder. There

Similarly, in cutting, grinding, etc., wear powder adheres to the surface of the workpiece and causes various problems.

Disclosure of the invention

Therefore, the inventors of the present invention have conducted plastic working and cutting of aluminum, steel, brass and other metals or alloys. When performing machining, grinding, etc., the removal of abrasion powder generated (washability) is good, and the workability is excellent, and the surface condition of the work material is also excellently finished. We conducted intensive research to develop a lubricating oil for metalworking that can do this.

As a result, alcohols, glycols, polyalkylene glycols, as well as base oils containing straight chain olefins having 6 to 40 carbon atoms. Alternatively, it has been found that the above object can be achieved by using a fatty acid.

The present invention has been completed based on such findings.o

That is, the present invention relates to (a) a base oil mainly composed of a straight chain olefin having 6 to 40 carbon atoms, and (b) an alcohol, a glycol, a polyalkylene. It is intended to provide a lubricating oil composition for metalworking, comprising at least one compound selected from the group consisting of alcohol, polyalkylene glycol derivatives and fatty acids. .

Further, the present invention provides a lubricating oil for metal working, comprising (a) a base oil and (c) at least one compound of a phenol compound and an amide compound. It also provides an oil composition.

BEST MODE FOR CARRYING OUT THE INVENTION

In the composition of the present invention, the linear oil constituting the base oil of the component (a) has 6 to 40 carbon atoms as described above. Those with less than 6 carbon atoms are not suitable because of their low flash points. Those with more than 40 carbon atoms are difficult to use because they are solid. Yes, it is difficult to mix and dissolve with mineral oil, synthetic oil, other additives, etc., which is unsuitable. Those with more than 40 carbon atoms are not common and are difficult to obtain. Among these straight-chain olefins, compounds having one double bond in the molecule and having 6 to 30 carbon atoms are preferred, and in particular, those having 12 to 30 carbon atoms. The best refrain (ie, n — the best ref) is best.

Specific examples of these linear derivatives include 1-octene, 1-decene, 1-dodecene, 1-tetradene, and 1-hexadecene. , 11-year-old decadecene, 11-eicosene, or a mixture of these. These straight-chain olefins can be obtained by various production methods, and for example, a polymer obtained by polymerizing ethylene by ordinary means can be used. It is possible to use Chilengo Lingmar.

In the present invention, the above-mentioned straight-chain olefin may be used alone as the base oil of the component (a), but it is also possible to use mineral oil and mineral oil or synthetic oil together. You may use. In addition, water can be mixed. The mineral oil or synthetic oil to be blended here usually has a kinematic viscosity of 0.5 to 500 cSt at 40, especially 0.5 to 500 cSt.

Those of 3 OcSt are preferably used. Among these, various types of mineral oils can be mentioned, for example, paraffinic, intermediate or naphthenic crude oils. Pressure distillation or normal pressure Distillate oil obtained by distilling residual oil from distillation under reduced pressure, or refined oil obtained by purifying it according to a conventional method, for example, solvent refined oil, hydrogenated refined oil, deoiled oil, etc. Blowing oil, clay clay oil, etc. can be mentioned. When these mineral oils are blended with the above-mentioned straight chain olefin, the resulting lubricant has improved oxidation stability.

In addition, synthetic oils other than the above-mentioned straight chain olefins (for example, branched olefins such as polybutene and polypropylene), and the like. Hydride hydride etc. can be used. In particular, low-molecular-weight polybutene and low-molecular-weight polypropylene are preferably α-aged olefin oligomers having 8 to 14 carbon atoms. When these synthetic oils are combined with the above-mentioned straight-chain oils, the resulting lubricant has less odor during use, improves the working environment, and further enhances the surface of processed products. Degreasing property is improved.

When a mineral oil or a synthetic oil is mixed with the above-mentioned straight-chain oil as the base oil of the above-mentioned component (a), the mixing ratio is not particularly limited, but is usually a straight-chain oil. At least 3% by weight, preferably 5 to 60% by weight, and mineral oil and Z or synthetic oil at 97% by weight or less, preferably 95 to 40% by weight.

When water is used in place of mineral oil or synthetic oil, it becomes an emulsion-type lubricant in which linear olefins are dispersed in water, and this may be used in the present invention. it can. Next, as the component (b) in the composition of the present invention, as described above, alcohols, glycols, polyalkylene glycols, and polyesters are used. One of the alkylene glycol derivatives and fatty acids is used alone, or two or more are used in combination.

Here, there are various types of alcohols, but aliphatic alcohols are preferred, and among them, carbon atoms of 6 to 40 (particularly carbon atoms of 8 to 40) are preferred. (30) branched or saturated aliphatic alcohols or C6 to C20 (particularly C8 to C18) linear or unsaturated. Aliphatic alcohols are preferred. If the number of carbon atoms is less than 6, it will be economically disadvantageous because of the large amount of consumption due to evaporation and scattering during use. In addition, fractional alcohols having more than 40 carbon atoms and linear alcohols having more than 20 carbon atoms may not dissolve in the base oil (a). Yes, it may not be desirable.

Specific examples of such alcohols include octyl (2-ethylhexyl) alcohol, decyl alcohol, and laurel. Alcohol, Millipore alcohol, Cetyl alcohol, Stearyl alcohol-Nore, Eikol Noreole, Ole Examples include inole alcohol, isostearyl alcohol, and oxo alcohol. The mixing ratio of this compound is not particularly limited, but it is usually the whole composition.

It is from 0.05 to 50% by weight, preferably from 0.1 to 20% by weight. Next, various types of glycols can be used, but generally, glycols having 2 to 6 carbon atoms, such as ethylene glycol and propylene glycol Glycol; trimethylethylene glycol; 1,4-butanediol; 1,5-pentandiol. The compounding ratio of this compound is usually from 0.05 to 50% by weight, preferably from 0.1 to 20% by weight, based on the whole composition, similarly to the above-mentioned alcohol. Polyalkylene glycol and its derivatives may be of various types, but the general formula (I)

^{^{R 1 - 0 (R 2 -}} 0) n - R 3 · · · (I)

[Wherein, R ¹ and R ³ each represent a hydrogen or an alkyl group having 1 to 20 carbon atoms, an alkyl-substituted phenyl group or a phenyl group having 7 to 24 carbon atoms, respectively. And R ² represents an ethylene group, a propylene group or a butylene group, and n represents an integer of 2 to 50. ]

The compound represented by is preferred. Specifically, poly (n = 6) ethylene glycol monobutyl ether; poly (n = 5) propylene glycol mono nonyl ether; poly (n = 10) Ethylene glycol-dipropyl ether. Glycerin derivatives of polyethylene glycol and fatty acid esters of polyethylene glycol other than the compound of the above general formula (I) may be used in the same manner. it can. These compounding ratios are usually from 0.05 to 0.5% of the whole composition as in the above-mentioned alcohol. 50% by weight, preferably 0.1 to 20% by weight. Further, as the fatty acid, a straight-chain or branched saturated or unsaturated fatty acid having usually 6 to 40 (preferably 8 to 20) carbon atoms can be mentioned. Here, if the number of carbon atoms is less than 6, it will be greatly consumed by evaporation and scattering when used, and if it exceeds 40, it will be component (a). May not dissolve in base oil. Is a tool body example of Do fatty acids would Yo of this, force-flops Li Le acid, force Prin acid, La U-phosphate, millimeter steel phosphate, Roh, ⁰ Le unknown phosphate, vinegar Thea Li Acid, arachinic acid, behenic acid, isostearic acid, pendecylenic acid, oleic acid, linoleic acid, linolenic acid, arakinic acid Donic acid and the like can be mentioned as suitable. The compounding ratio of this compound is usually 0.05 to 1.0% by weight of the whole composition. If the proportion of the fatty acid exceeds 1.0% by weight, the annealing property is unfavorably reduced.

The composition of the present invention comprises the above-mentioned components (a) and (b). Instead of the component (b), there are some of the above-mentioned components (a) and (b). In addition to the component (b), at least one compound of the phenolic compound and the amine compound that is the component (c) can be blended.

Here, as the phenolic compound, various compounds can be used, and usually, the compound represented by the general formula (H) or (II)

Wherein and each R ^B is indicates § alkyl group having 1 to 8 carbon atoms, RS and R ⁷ were each hydrogen or represents an alkyl group having 1 to 6 carbon atoms. ]

Those represented by are given. Specifically, 2, 6-di-tert-butyl-4-methylphenol

(DBPC); 2, 6-Di-tert-butyl-41-ethyl phenol; 2,2'-methyl benzo (4-methyl-6-tert-butyl phenol) ); 2,2'-methylbenzene (4-ethynole 6-tert-butylphenol) and the like are suitable.

On the other hand, various kinds of amide-based compounds can be mentioned, but usually, the general formula (IV) or (V)

[Wherein, R ⁸ and R ¹¹ each represent hydrogen or an alkyl group having 1 to 10 carbon atoms, and R ⁸ and R 10 Each represents an alkyl group having 120 carbon atoms;

R ¹² to R ¹⁴ each represent hydrogen or carbon number 1 to

It represents 20 alkyl groups. ]

It is represented by Specifically, such as di-P-octyl diphenylenamine, di-p-butyldiphenylamine, di-p-dinonylenamine, etc. They are suitable for use such as phenyl-naphthylamine, phenyl-naphthylamine, and the like.

The compounding ratio of the component (c) is preferably 0.1% by weight or more of the whole composition, and particularly preferably in the range of 0.1 to 2.0% by weight.

The composition of the present invention may contain an appropriate amount of a well-known oily agent, extreme pressure agent, antioxidant, corrosion inhibitor, antifoaming agent, and the like, if desired.

〔Example〕

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

Examples 1 to 12 and Comparative Examples 1 to 3

The following rolling experiments were conducted using rolling lubricants of the specifications shown in Table 1.

Rolling experiment (rolling of aluminum plate)

JISA 505 2 HI6 aluminum plate (thickness of 1.2 mm, width of 60 mm, coil) was prepared as the rolled material, and this was used as the work roll diameter. The rolling speed was 100 m / min, the forward tension was 170 kgf, and the forward tension was 40 Okgf, using a four-high rolling mill of 135 sq.m. And rolled. The rolling method used was a rolling method in which the rolling reduction was increased stepwise from 50.0 → 54.2 → 58.3 → 60.8 → 63.3 → 65.8 → 68.3 (%) in 20 m increments in one pass. In other words, when the plate thickness at 0.38 thigh (during a 7th pass) was 0.38 thigh (reduction ratio: 68.3%), the rolling force was measured, and the abrasion powder cleaning property and annealing were performed by the following methods. The properties and rolling force were evaluated.

(a) Abrasive detergency evaluation method (tape test method)

Cellophane tape was adhered to the surface of the rolled aluminum plate, and the adhered wear powder was collected. This was affixed to white paper, and the degree of dirt due to the abrasion powder was visually determined to evaluate the adhesion of the aluminum plate surface to the abrasion powder detergency. The results are shown in Table 1.

(b) Annealability evaluation method

The rolled aluminum sheet was cut into short pieces of 1 Ocm in length, tens of sheets were stacked, fixed with thick steel plates, and annealed in a small annealing furnace.

The heating conditions of the annealing furnace were as follows: heating was performed in an air atmosphere at a heating rate of 5 eCZ to 330, holding for 30 minutes, and then allowing to cool. After the completion of the heating, the degree of occurrence of the annealing stain on the annealed plate was visually determined, and the annealing property was evaluated. The results are shown in Table 1.

(Hereinafter the margin) Table 1

* 1 1 Hexadecene and 1 year old Kutadecene etc.

* 240. No., with a building degree of 4 cSt in C. Raffinic mineral oil

* With a kinematic viscosity of 6 cSt at 34 ° C

* 4 Δ indicates that there is no dirt, Δ indicates that there is a little dirt, and X indicates that there is much dirt.

* 5 〇 indicates that there is no sting, △ indicates that there is sting, and X indicates that it is stingy.

Examples 13 and 14 and Comparative Examples 4 and 5

The following cutting experiments were carried out using cutting lubricant of the specifications shown in Table 2.

Cutting experiment (Cylinder end cutting)

A cylindrical aluminum alloy (AC-4A-T6) with a diameter of 80 thighs was prepared as a material for cutting, and this was cut using a cutting tool (carbide P20). (Cut) l mm, f (feed) 0.1 Cut the cylindrical end face of the above aluminum alloy under the cutting conditions of thigh / rotation. After cutting, the surface roughness of the cut end face (R _max ) Measurement and surface observation were performed. Table 2 shows the results.

(Hereinafter the margin)

Table 2

* 1, 2 Same as Table 1 c

Industrial applicability

As described above, when the lubricating oil composition of the present invention is used, metal working of various metals and alloys thereof (rolling, drawing, punching, drawing, cold forging, and other plastic working, cutting, and grinding). In addition to improving the washability of wear powder during processing, etc., the annealing property of the processed material is also improved.

Therefore, the lubricating oil composition of the present invention can be used for plastic working and cutting of various metals and alloys including aluminum, aluminum alloy, and aluminum foil. Widely and effectively used as a metalworking fluid for grinding and the like.

Claims

The scope of the claims

1. (a) Base oil mainly composed of straight chain olefins having 6 to 40 carbon atoms, (b) alcohol, glycol, polyalkylene glycol, etc. A lubricating oil composition for metalworking, comprising one or more compounds selected from the group consisting of polyesters, polyalkylene glycol derivatives and fatty acids.

2. (a) A base oil consisting of a mixture of a straight-chain olefin having 6 to 40 carbon atoms and a mineral oil or a synthetic oil, and (b) an alcohol or a glycol. A lubricating oil composition for metalworking, comprising one or more compounds selected from the group consisting of glue, polyolefin, glycol and fatty acid.

3. The lubricating oil composition for metal working according to claim 1, wherein (c) at least one compound of a phenolic compound and an amide compound is blended.

4. (a) A base oil mainly composed of a straight-chain olefin having 6 to 40 carbon atoms, and at least (c) a phenolic compound and an amine compound. A lubricating oil composition for metalworking, comprising one compound.

5. A base oil consisting of a mixture of (a) a straight-chain olefin having 6 to 40 carbon atoms and a mineral oil or a synthetic oil, and (c) a phenolic compound and an amine. A lubricating oil composition for metalworking comprising at least one compound selected from the group consisting of metal-based compounds.