JP3371375B2 - Lubricating oil for metal processing - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a lubricant for metalworking. Specifically, a plate or foil of a metal or its alloy, which contains a specific linear olefin and a polar group-containing compound,
In particular, it suppresses the amount of abrasion powder generated in plastic processing such as rolling, drawing, punching, drawing and cold forging of nonferrous metal plate or foil such as aluminum or aluminum alloy, and metal processing such as metal cutting and grinding. However, the present invention relates to a lubricating oil agent for metal processing, which can finish the surface condition of a product well, improve metal processing performance, and improve productivity.

[0002]

2. Description of the Related Art Lubricants for metal working used for metal working such as rolling of a plate or foil of a metal or its alloy include
From the standpoint of improving productivity, metalworking performance such as rolling performance is required. At the same time, it is required that the quality of the metal surface after processing, especially surface finish and cleanliness, is good. However, when processing a plate or foil of a metal or its alloy, especially a plate or foil of a non-ferrous metal such as aluminum or an aluminum alloy, especially an aluminum material with high purity of aluminum, a large amount of abrasion powder is generated during processing. There is.
Conventionally, lubricating oils for metal processing have maintained processability to some extent by blending mineral oils or synthetic saturated hydrocarbon oils with oil-based agents such as alcohols, fatty acid esters, fatty acids and extreme pressure agents. However, this type of conventional lubricant for metalworking has a problem that the metalworking performance can be improved, but the surface quality of the metal cannot be kept good.

[0003]

Therefore, the inventors of the present invention have excellent workability in metal working of a plate or foil of a metal or its alloy, particularly a plate or foil of a non-ferrous metal such as aluminum, and wear. We have conducted intensive research to develop a lubricant for metal processing that suppresses the amount of powder generation and has excellent surface quality. As a result, they have found that a lubricating oil for metalworking having excellent performance can be obtained by using a specific linear olefin and a polar group-containing compound. The present invention has been completed based on such findings.

[0004]

That is, the present invention is
(A) a linear olefin having 6 to 40 carbon atoms and (B) an acid amide compound, an acid imide compound, an acid ester compound,
Lubrication for metalworking, containing at least one polar group-containing compound selected from copolymers of benzylamine compounds and methacrylates with monomers consisting of amine compounds, amide compounds, ether compounds or carbonyl compounds An oil agent is provided. First, the straight chain olefin as the component (A) constituting the lubricating oil agent for metalworking of the present invention has 6 to 40 carbon atoms as described above. Here, those having less than 6 carbon atoms are not suitable because they have a low flash point and may cause a fire during processing. Further, those having a carbon number of more than 40 are not suitable because they become solid and are difficult to use, and moreover, it is difficult to mix and dissolve with base oil and other additives. Further, those having a carbon number of more than 40 are not common and are difficult to obtain. Among these linear olefins, compounds having one double bond in the molecule and having 6 to 30 carbon atoms are preferable, and particularly α-olefins having 12 to 30 carbon atoms (that is, n-α- Olefin) is most suitable. Specific examples of these linear olefins include 1-octene,
Examples thereof include 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, and mixtures thereof. As these linear olefins, those obtained by various production methods can be used. For example, an ethylene oligomer obtained by polymerizing ethylene by a usual means can be used.

By the way, in the lubricating oil agent for metalworking of the present invention, the linear olefin as the component (A) can be used alone to form a lubricating oil agent for metalworking.
In the straight chain olefin of the component (A), as the component (A ′),
A base oil such as mineral oil and / or synthetic oil or water can be added. In this case, by adding the component (A '), the oxidation stability and wear resistance can be improved. The mixing ratio of the component (A) and the component (A ′) is not particularly limited, but the linear olefin of the component (A) is 2 to 99.99% by weight, preferably 2 -60% by weight, more preferably 5-
It can be blended at a ratio of 50% by weight. If the amount of the linear olefin is less than 2% by weight, the metalworking performance may not be maintained. Further, when it exceeds 99.99% by weight,
It is not preferable because the effect of the additive that suppresses generation of abrasion powder may not be exhibited. Here, of the component (A ') that can compose the lubricating oil agent for metalworking of the present invention together with the linear olefin of the component (A), a mineral oil, a synthetic oil or the like should be used as the base oil. You can As the above base oil, those usually used as a lubricating oil can be used, and the kinematic viscosity at 40 ° C. is 0.5 to 1,000.
cSt, preferably 0.5-100 cSt, especially 0.5-30 cS
Those of t are preferably used.

As the mineral oil among the above base oils, various kinds can be mentioned. For example, paraffin-based crude oil,
Intermediate base crude oil or naphthene base crude oil is distilled under atmospheric pressure, or distillate oil obtained by distilling the residual oil of atmospheric distillation under reduced pressure, or refined oil obtained by refining it according to a conventional method, For example, solvent refined oil, hydrogenated refined oil, dewaxing treated oil, clay treated oil and the like can be mentioned. When the above linear olefin is blended with these mineral oils, the lubricating oil obtained has improved oxidation stability and wear resistance.

As the synthetic oil, olefins other than the above-mentioned linear olefins (for example, branched olefins such as polybutene and polypropylene), hydrides of these olefins, polyol esters [for example, TMP (trimethylolpropane) fatty acid ester, Ester compounds such as PE (pentaerythritol) fatty acid ester and the like can be used. In particular, low molecular weight polybutene, low molecular weight polypropylene, α-olefin oligomer having 8 to 14 carbon atoms and hydrides thereof are preferable.
When the straight chain olefin is added to these synthetic oils, the resulting lubricating oil has less odor emitted during use, improves the working environment, and further improves the degreasing property of the surface of the processed product. And, if water is used instead of the base oil, it becomes an emulsion type lubricating oil in which a linear olefin is dispersed in water,
This can also be used in the present invention.

Next, as the polar group-containing compound of the component (B) constituting the lubricating oil agent for metalworking of the present invention, acid amide compounds, acid imide compounds, acid ester compounds,
Examples thereof include those selected from copolymers of benzylamine compounds and methacrylates with monomers of amine compounds, amide compounds, ether compounds or carbonyl compounds, and one or more of these may be used. First, the acid amide compound is, for example, a reaction product of a fatty acid having 8 to 30 carbon atoms and a polyalkylene polyamine, or a boron compound thereof (for example, boric acid, boric acid ester, boron halide, borate). (Na, K, Li salt, etc.) and the like). Here, as the above-mentioned fatty acid having 8 to 30 carbon atoms,
For example, straight chain and branched chain such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, arachidic acid, behenic acid, undecyl acid, oleic acid, linoleic acid, linolenic acid, and arachidonic acid. Examples thereof include saturated fatty acids and unsaturated fatty acids. On the other hand, as the polyalkylene polyamine, for example, diethylene triamine, triethylene tetramine,
Tetraethylene pentamine, pentaethylene hexamine and the like can be mentioned, and they can be used alone or in combination.

There are various acid imide compounds, for example, a polymer having a molecular weight of 200 to 3,000 (for example, polybutene, polyisobutylene, polypropylene, etc.), a dicarboxylic acid or its anhydride, and a polyalkylene polyamine. A reaction product or a reaction product thereof with a boron compound (for example, boric acid, boric acid ester, boron halide, borate (Na, K, Li salt, etc.)) is preferably used. Here, examples of the dicarboxylic acid or its anhydride include a saturated dicarboxylic acid having 4 to 8 carbon atoms or an unsaturated dicarboxylic acid or an anhydride thereof, and examples thereof include succinic acid, glutaric acid, adipic acid, pimelic acid, and suberic acid. , Maleic acid, fumaric acid and their anhydrides, especially succinic anhydride and maleic anhydride. On the other hand, as the polyalkylene polyamine, the same one as in the case of the acid amide compound can be used.
Specific examples of the acid imide compound include polyalkenyl succinimides such as polybutenyl succinimide and boron derivatives thereof.

Further, there are various kinds of acid ester compounds, for example, a polymer having a molecular weight of 200 to 3,000 (for example, polybutene, polyisobutylene, polypropylene etc.), a dicarboxylic acid or its anhydride and a polyhydric alcohol. Reaction products are preferably used. Here, as the dicarboxylic acid or its anhydride, the same one as in the case of the acid imide can be used. On the other hand, there are various polyhydric alcohols, and examples thereof include ethylene glycol, propylene glycol, trimethylolpropane, pentaerythritol, and sorbitol. Specific examples of the acid ester compound include polybutenyl succinic acid and polyalkenyl succinic acid esters such as pentaerythritol and ethylene glycol ester.

Further, as the benzylamine compound,
It is possible to use those produced by reacting an alkyl or alkenylphenol synthesized from polybutene or polypropylene and phenol, formaldehyde and polyamine with a Mannich reaction. A specific example is 2-
Hydroxy-5-alkylbenzyl (poly) amines. On the other hand, the copolymer is a copolymer of methacrylates and a monomer composed of an amine compound, an amide compound, an ether compound or a carbonyl compound. Here, the methacrylates are alkyl methacrylates having an alkyl group having 1 to 20 carbon atoms (methyl methacrylate, ethyl methacrylate, butyl methacrylate,
Octyl methacrylate, lauryl methacrylate, tridecyl methacrylate, stearyl methacrylate,
Oleyl methacrylate and the like).
Particularly, those having an alkyl group having 8 to 20 carbon atoms are preferable. Further, examples of the monomer composed of an amine compound, an amide compound, an ether compound or a carbonyl compound include diethylaminoethyl methacrylate, 2-methyl-5-vinylpyridine as an amine compound, and N-vinylpyrrolidone as an amide compound. The ether compound is polyethylene glycol methacrylate, and the carbonyl compound is maleic anhydride.

In the present invention, the above-mentioned various components can be used as the component (B), but an acid amide compound and an acid imide compound are particularly preferably used. Preferred specific examples thereof include a reaction product of isostearic acid and tetraethylenepentamine (TEPA) or a reaction product of polybutene, maleic anhydride and TEPA. In the lubricating oil agent of the present invention, the mixing ratio of each component is not particularly limited and may be appropriately determined according to various situations. For example, the polar group-containing compound of the component (B) is
For the (A) component or [(A) + (A ')] component,
The amount may be 0.01-5% by weight, preferably 0.1-3% by weight, and more preferably 0.1-1% by weight. If the added amount of the polar group-containing compound as the component (B) is less than 0.01% by weight, the effect of improving the surface quality and the effect of improving the productivity may not be sufficiently exhibited, and the amount is 5% by weight.
If it exceeds, workability may be deteriorated, which is not preferable.

The metalworking lubricant of the present invention comprises the above-mentioned components (A) and (B) or (A), (A ') and (B).
However, in addition to the above, various additives can be appropriately added as the component (C) within a range not impairing the object of the present invention. Here, various additives include oiliness improvers, rust preventives, corrosion inhibitors, defoamers,
Examples thereof include emulsifiers. As the oiliness improver, for example, aliphatic alcohol, carboxylic acid ester, fatty acid and the like can be used. As the aliphatic alcohol, a branched saturated or unsaturated alcohol having 6 to 40 carbon atoms and a linear saturated or unsaturated alcohol having 6 to 20 carbon atoms can be used. Further, as the carboxylic acid ester, a reaction product of the above aliphatic alcohol with a linear or branched saturated or unsaturated fatty acid having 6 to 40 carbon atoms or a dicarboxylic acid can be used. Then, as the fatty acid, a linear or branched saturated or unsaturated fatty acid having 6 to 40 carbon atoms can be used. Examples of emulsifiers include nonionic surfactants (eg, polyoxyalkylene alkyl (phenyl) ethers such as polyoxyethylene nonylphenyl ether, fatty acid ethylene oxide adducts, etc.), anionic surfactants, cationic surfactants, etc. Can be used.

[0014]

The present invention will be further described in detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. In addition, the compounding quantity in an Example is all weight%. (A) Rolling experiment (rolling of aluminum foil) High-purity aluminum foil material (aluminum content: 99.
99%, plate thickness: 0.1 mm, plate width: 60 mm, coil) was prepared, and this was rolled under the rolling conditions shown below using each rolling lubricant. As for the rolling method, constant reduction rolling (rolling length: 550 m) was performed at two levels of reduction (42%, 53%), rolling reduction of 53% and rolling distance of 500.
The comparison of the rolling load at the time point of m and the cleaning property of abrasion powder on the rolled foil after the test were evaluated. Rolling conditions Rolling mill Reversible quadruple rolling mill Work roll SUJ-2, φ135 × 200L, Crown: 2/100 HS: 95, Ra: 0.2 to 0.25 μm Backup roll SW-2, φ200 × 200L Tension front 12kgf , Rear 6 kgf Rolling speed 100 m / min Rolling force 8 to 27 ton Rolling oil supply amount About 26 liters / min Oil supply temperature 40 ° C

(B) Method for evaluating abrasion debris cleanability (tape test method) Cellophane tape was adhered to the surface of the rolled aluminum foil to collect adhering abrasion powder. This was attached to a white paper and the degree of dirt due to abrasion powder was visually judged to evaluate the cleaning ability of the adhered abrasion powder on the surface of the aluminum foil. Detergency evaluation judgment ◎: Pass with no stain ○: Pass with very little stain △: Fail with stain ×: Fail with much stain

Examples 1 and 2 and Comparative Example 1 Paraffinic mineral oil having a kinematic viscosity of 3.0 cSt at 40 ° C. was used as the component (A '), and the components were blended at the blending ratio shown in Table 1, ) + (A ′) + (B) [(C) component is not included. ]
A lubricating oil for rolling was prepared, and the rolling was performed.
The results are shown in Table 1.

[0017]

[Table 1]

Examples 3 and 4 and Comparative Examples 2 and 3 Paraffinic mineral oil having a kinematic viscosity of 3.0 cSt at 40 ° C. was used as the component (A '), and the components were blended at the blending ratio shown in Table 2. (A) + (A ′) + (B) + (C) rolling lubricants were prepared and the rolling was performed. The results are shown in Table 2.

[0019]

[Table 2]

Examples 5 and 6 and Comparative Example 4 As the component (A '), synthetic oil having a kinematic viscosity of 2.5 cSt at 40 ° C. was used, and the components were blended at the blending ratio shown in Table 3 to obtain (A).
+ (A ') + (B) [(C) component is not included. ] Lubricating oil for rolling was prepared, and the rolling was performed. The results are shown in Table 3.

[0021]

[Table 3]

Examples 7 and 8 and Comparative Examples 5 and 6 As the component (A '), synthetic oil having a kinematic viscosity of 2.5 cSt at 40 ° C. was used, and the components were blended at the blending ratios shown in Table 4, A)
+ (A ') + (B) + (C) rolling lubricant was prepared,
The rolling was performed. The results are shown in Table 4.

[0023]

[Table 4]

Looking at Examples 1, 2, 5 and 6,
By adding the polar group-containing compound of the component (B) to the mixture of the component (A) and the component (A ′), the workability is improved by reducing the rolling load, and the cleanliness of the surface of the rolled material is reduced by reducing the amount of abrasion powder. It can be seen that the effect of adding the polar group-containing compound as the component (B) is exhibited. Further, regarding Examples 3, 4 and 7, 8, by adding the component (C) to the mixture of the components (A), (A ′) and (B), the effect of cleaning property and rolling property is increased. I understand that On the other hand, regarding Comparative Examples 2 and 5,
When the component (C) is added to the mixture of the component (A) and the component (A ′) but the component (B) is not included, the rolling load is reduced but the surface cleanliness is poor. I understand. In addition, regarding Comparative Examples 3 and 6, the component (A ′)
It can be seen that when only the components (B) and (C) are added but the component (A) is not included, the rolling load is very high and the workability is poor. From the above results, (A) component and (A ')
By adding the component (B) to the mixture of components, a high-purity aluminum material (aluminum content of 99% or more)
In the case of processing, it is possible to suppress the generation of abrasion powder while maintaining the workability, and it is possible to maintain the cleanliness of the surface of the workpiece. Moreover, by adding the component (C),
Cleanability and workability can be further improved.

[0025]

As described above, the lubricating oil agent for metalworking of the present invention is used, for example, when it is used as a lubricating oil agent for rolling a nonferrous metal, particularly a high-purity aluminum material (aluminum content of 99% or more). It has excellent rolling performance such as reduction of rolling load and improvement of rolling reduction, which can improve productivity and can suppress the generation of abrasion powder on the surface after rolling and improve the surface quality of products. You can Therefore, the lubricant for metalworking of the present invention is widely and effectively utilized as a lubricant for metalworking in metalworking such as rolling of various metals, especially nonferrous metals or their alloys.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI C10M 139: 00) C10M 101: 02 (C10M 169/04 C10N 40:20 Z 101: 02 105: 04 133: 16 139: 00) (C10M 173/02 105: 04 133: 16 139: 00) C10N 40:20 (56) Reference JP-A-2-133495 (JP, A) JP-A-5-98274 (JP, A) JP-A-6 −9983 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C10M 169/04 C10M 101/02 C10M 105/04 C10M 105/32-105/48 C10M 105/60 C10M 105 / 68 C10M 107/28 C10M 107/42 C10M 109/02 C10M 127/02 C10M 129/68-129/84 C10M 129/95 C10M 133/06 C10M 133/16-133/20 C10M 133/56 C10M 139/00 C10M 145/14 C10M 149/02-149/10 C10M 159/16 C10M 173/00-173/02 C10N 40:20-40:24

Claims (2)

(57) [Claims] 1. A reaction product of (A) a straight chain olefin having 6 to 40 carbon atoms and (B) a fatty acid having 8 to 30 carbon atoms and a polyalkylene polyamine, or a reaction product of these with a boron compound and an acid. A lubricant for metalworking, comprising at least one polar group-containing compound selected from imide compounds. 2. A base oil comprising (A) a straight chain olefin having 6 to 40 carbon atoms, (A ') mineral oil and / or synthetic oil or water, and (B) a fatty acid having 8 to 30 carbon atoms and a polyalkylene polyamine. metalworking lubricating oil, characterized in that it contains at least one polar group-containing compound selected from the reaction product and acid imide compound in the reaction product, or with those with a boron compound.