JPH1192977A - Ash-free stain preventing and rust preventing oil composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such an ash-free stain preventing and rust preventing oil compsn. with low viscosity which can be also used as a cleaning oil that the stain preventing performance and rust preventing performance are not decreased even when a processing oil such as a cutting oil is mixed, therefore, the number of exchanging times of a new oil for the rust preventing oil can be decreased, and as a result, the compsn. contributes to the reduction of the cost and the improvement in the productivity. SOLUTION: This compsn. is prepared by compounding the following three components. (A) An alkenyl succinic imide or its derlv. by 1 to 30 wt.%, for example, a compd. of about 900 to 6000 mol.wt. having a butenyl group and 0.5 to 3 wt.% nitrogen content. (B) Amino alcohols by 0.1 to 20 wt.%, for example, aminoalcohols of secondary amines or tertiary amines having 1 to 6 carbon atoms in the alkyl group. (C) A base boil by 50 to 98.9 wt.%, for example, a mineral oil having 0.5 to 20 mm<2> /s viscosity at 40 deg.C to be used as the base oil of a rust preventing oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a stain preventing property which is obtained by subjecting a metal to various processes such as cutting, grinding, pressing and polishing, and then using the processed product, even if processing oil is mixed. The present invention relates to an ashless type anti-stain rust-preventive oil composition which can ensure rust-preventive performance without being impaired.
Here, “stain” refers to a mainly black discoloration phenomenon observed on the surface of a metal.

[0002]

2. Description of the Related Art In the processing of metals, various processing oils such as cutting oil, grinding oil and press oil are used in many cases. Usually, additives such as an oiliness improver and an extreme pressure improver are added to these processing oils, and metal powder may be generated during the processing.
If such an additive or metal powder adheres to a processed part, rust is likely to occur. Therefore, for the purpose of removing metal powder and ensuring rust prevention performance, a low-viscosity rust prevention oil is applied after processing.

However, it is unavoidable that metal working oil is mixed into rust preventive oil. Often, the rust preventive oil is replaced with new oil, or a pre-cleaning line is installed after working to remove the metal working oil. Needed.

[0004] Frequent replacement of the rust-preventive oil with new oil not only increases the cost, but also necessitates the stoppage of the line at the time of replacement, thus affecting productivity. If a pre-cleaning line is provided, it is not necessary to stop the line. However, this requires not only equipment costs but also new problems such as securing a place and maintenance.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art as described above, and it is assumed that a current line for processing metal is used as it is, and that machining of cutting oil or the like is performed. Even if oil is mixed, the stain prevention performance and the rust prevention performance are not impaired, so it is possible to reduce the number of times of replacing rust preventive oil with new oil, thereby contributing to cost reduction and productivity improvement. An object of the present invention is to provide an ashless type anti-stain anti-rust oil composition which can also be used as a cleaning oil and has a low viscosity.

[0006]

The ashless rust-preventing rust-preventing oil composition of the present invention which achieves the above object comprises the following three components: (A) alkenyl succinimide or a derivative thereof:
To 30% by mass, (B) amino alcohols: 0.1 to 2
0% by weight, and (C) base oil: 50 to 98.9% by mass.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

[0008] The alkenyl succinimide of A component or a derivative thereof constituting the ashless type anti-stain rust preventive oil composition of the present invention is a monotype represented by the following formula [1]:
Alternatively, it has a bis-type structure represented by the following formula [2]. Those having a nitrogen content of 0.5 to 3% by mass are preferred. If the nitrogen content is less than 0.5% by mass, the stain prevention performance is not sufficient, and if it exceeds 3% by mass, no improvement in the effect is observed. A more preferable range of the nitrogen content is 0.7 to 2.5% by mass.

[0009]

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[0010]

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In the above formulas [1] and [2], R represents a polybutenyl group. Preferably, the average molecular weight is 9
00-6000. If the average molecular weight is less than 900, the stain prevention performance is insufficient, and
If it exceeds, the water separation property is reduced, and both are not preferred. More preferred is an average molecular weight of 1500 to 300
0. R ¹ represents a divalent saturated aliphatic hydrocarbon having 2 to 5 carbon atoms, and n is an integer of 1 to 10.

The above-mentioned succinimide is generally obtained by reacting a polybutenylsuccinic anhydride obtained by a reaction between polybutene and maleic anhydride with a polyamine.

Examples of polyamines which are reacted with polybutenylsuccinic anhydride include single diamines such as ethylenediamine, propylenediamine, butylenediamine and pentylenediamine, and polyalkylenepolyamines such as diethylenetriamine, triethylenetetramine, and the like. Tetraethylenepentamine, pentaethylenehexamine, dimethylethylenetriamine, dibutylenetriamine, tributyrenetetramine,
Pentapentylenehexamine and the like. In the present invention, a derivative thereof can also be used as the alkenyl succinimide. Examples of the alkenyl succinimide derivatives include JP-B-42-8013 and JP-B-42.
2-8014, JP-A-51-52381, JP-A-5-52381
No. 1,130,408 discloses an alkenylsuccinimide such as a boron compound derivative, an organic phosphonate derivative, or an alkenylsuccinimide, which is converted to an aldehyde, ketone, carboxylic acid, sulfonic acid, alkylene oxide, sulfur, polyhydric alcohol, or the like. And an alkenyl succinimide derivative obtained by the reaction with

The above alkenyl succinimides or derivatives thereof may be used alone or as a mixture of two or more.

As the amino alcohols of the component B used in the present invention, amino alcohols of secondary amines and amino alcohols of tertiary amines are preferred.

The amino alcohol of the secondary amine is represented by the following formula.

[0017]

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[0018]

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R ¹ in the above formula is a linear or branched alkyl group having 1 to 6 carbon atoms, preferably 2 to 4 carbon atoms. If the number of carbon atoms exceeds 6, the stain prevention performance is undesirably reduced. Also,
n and m are integers of 1 to 6, preferably 2 to 4
It is. If n and m exceed 6, the stain prevention performance is undesirably reduced. -(CH2) n- and-
The alkylene group represented by (CH2) m- may be linear or branched.

Specific examples of the secondary amine amino alcohol include N-methylethanolamine, N-ethylethanolamine, Nn-butylethanolamine,
N-t-butylethanolamine, N- (β-aminoethyl) ethanolamine, N- (β-aminoethyl) isopropanolamine and the like can be mentioned.

The amino alcohol of the tertiary amine is represented by the following formula.

[0022]

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[0023]

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R ¹ and R ^{2 in} the above general formula are linear or branched alkyl groups having 1 to 6, preferably 2 to 4 carbon atoms. If the number of carbon atoms exceeds 6, the stain prevention performance is undesirably reduced. Where n
And m is an integer of 1 to 6, preferably 2 to 4. If n and m exceed 6, the stain prevention performance is undesirably reduced. -(CH2) n- and-(CH
2) The alkylene group represented by m- may be linear or branched.

Specific examples of the tertiary amine amino alcohol include N, N-dimethylethanolamine, N, N
N-diethylethanolamine, N, N-dibutylethanolamine, N-methyldiethanolamine, Nn
-Butyldiethanolamine, Nt-butyldiethanolamine, N, N-diethylisopropanolamine and the like.

The above-mentioned amino alcohols may be used alone or in combination of two or more.

The C component serving as a base material to which the above-mentioned A component and B component are added includes those conventionally used as base oils for rust preventive oils, for example, various mineral oils such as paraffinic mineral oil and naphthenic mineral oil, Specifically, kerosene, light oil,
Highly refined base oils such as spindle oil, machine oil, turbine oil, and motor oil may be used. The viscosity of the base oil is usually preferably 0.5 to ²⁰ mm ² / s at 40 ° C.

These base oils may be used alone or in combination of two or more.

In the ashless type anti-stain rust-preventing oil composition of the present invention, the alkenyl succinimide of the component A or a derivative thereof is 1 to 30% by mass, preferably 2 to 15% by mass.
% By mass. If the addition amount is less than 1% by mass, the effect of preventing stain cannot be obtained, and even if it exceeds 30% by mass, no further improvement in the effect of preventing stain can be expected. The amino alcohol of the component B accounts for 0.1 to 20% by mass, preferably 0.5 to 10% by mass. If this amino alcohol is less than 0.1% by mass, the effect of preventing stains cannot be obtained, and even if added in an amount of 20% by mass or more, no further improvement in the effect of preventing stains is observed. The base oil of the component C is 50 to 98.9% by mass, preferably 75 to 98.9% by mass.
Accounts for 97.5% by weight.

The ashless type anti-stain rust-preventing oil composition of the present invention may contain, if necessary, components other than the above-mentioned components A to C, such as antioxidants such as phenols and amines, silicones and fluorines. And anticorrosives such as benzotriazole and benzotriazole derivatives. The amount of these components added
It may be appropriately selected within a range that does not impair the performance of the ashless type anti-stain rust preventive oil composition of the present invention. The ashless type anti-stain rust preventive oil composition of the present invention can be prepared by mixing the above-mentioned components in predetermined amounts and in an appropriate procedure. The order of mixing is also arbitrary.

[0031]

Next, the present invention will be described based on Examples and Comparative Examples.
This will be described more specifically. However, the present invention is not limited by these examples.

In Examples and Comparative Examples, ashless type anti-stain anti-rust oil compositions were prepared by blending essential components A and B with base oil C. The stain prevention performance and the rust prevention performance were evaluated. The components A, B, and C used in the preparation of the compositions in each of the examples and comparative examples, and the abbreviations thereof are as follows.

(Component A) Alkenyl succinimide A-1: Mono-type alkenyl succinimide having an average molecular weight of about 1,500 butenyl groups and a nitrogen content of 2.
A-2: A bis-type alkenyl succinimide having an average molecular weight of butenyl group of about 2500 and having a nitrogen content of 1%.
6% (Component B) amino alcohol B-1: (secondary amine amino alcohol) N- (β
-Aminoethyl) ethanolamine B-2: (same as above) N-n-butylethanolamine B-3: (tertiary amine amino alcohol) N-N-
Dibutylethanolamine (Component C) base oil Base oil: A highly refined paraffinic mineral oil. Viscosity at 40 ° C. 3 mm ² / s.

(Evaluation Method) The evaluation test of the stain prevention performance is performed as follows. First, 60mm x 80mm
A × 1.2 mm SPCC steel plate is uniformly polished in the long side direction with # 240 sandpaper. This steel plate is gently rubbed with gauze in a mineral spirit solution to wash off dust and dirt attached to the test piece, and then dried with hot air. Then, immediately after immersing in separately prepared boiling methanol for 1 minute or more, it is dried with hot air. The cold-rolled steel sheet thus cleaned is immersed in cutting oil (containing 3% of chlorine and 1% of sulfur), and then immersed in rust-preventive oil.
Five sheets are stacked and fixed with W clips. This is 50 ℃
Hold horizontally in a 95% RH thermostat and leave for 1 week. Thereafter, the state of occurrence of black discoloration (stain) occurring on the mating surface of the steel sheet is determined based on the following criteria.

◎: No stain generation ○: Stain generation area less than 5% △: Stain generation area 5% or more to less than 20% ×: Stain generation area 20% or more The evaluation method of rust prevention performance is as follows. is there. As in the evaluation of the stain prevention performance, 60 mm x 80 mm
An SPCC steel plate of mm × 1.2 mm is uniformly polished in the long side direction with # 240 sandpaper. While gently rubbing this steel plate with gauze in a mineral spirit solution, dirt, dust and the like adhering to the test piece are washed off and dried with hot air. Then, immediately, it is immersed in separately prepared boiling methanol for 1 minute or more, and then dried with warm air. The cold-rolled steel sheet thus cleaned is immersed in rust-preventive oil, and drained after 24 hours. This is 50 ° C x 95
Leave for 1 week in a% RH constant temperature bath. Then, the state of rust generated on the surface of the steel sheet is determined according to the following criteria.

◎: No rust generated ○: Rust generated area less than 5% △: Rust generated area 5% or more to less than 20% ×: Rust generated area 20% or more [Examples 1 to 12] A component, B component and C The components were blended in the proportions (% by mass) shown in Table 1 to prepare an ashless anti-stain anti-rust oil composition. The results of evaluating the stain prevention performance and rust prevention performance of those compositions,
It is shown in Table 2.

Table 1 Example 1 2 3 4 5 6 7 8 9 9 10 11 12 A component: A-1 5 3 3 A-2 5 5 5 5 10 5 3 5 5 5 5 5 3 B component: B-1 1 1 11 11 B-2 11 11 11 B-3 11 13 11 11 C component: base oil 94 94 94 94 89 92 91 93 93 93 92 91 Table 2 Example 1 2 3 4 5 6 7 8 9 10 11 12 Stain prevention ○ ○ ○ ○ ○ ◎ ◎ ◎ ◎ ◎ ◎ ◎ Rust prevention ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ [Comparative Examples 1 to 6] A, B and C components Table 3
To prepare an oil composition. Table 4 shows the results of evaluating the stain prevention performance and the rust prevention performance of these oil compositions.

Table 3 Comparative Example 1 2 3 4 5 6 6 A component A-1 5 3 3 A-2 5 3 3 B component B-1 3 1 B-2 1 B-3 3 1 C component base oil 95 95 94 97 97 97 Table 4 Comparative Example 1 2 3 4 5 6 Stain prevention × × × △ △ △ Rust prevention ◎ ◎ ◎ × × ×

[0039]

The ashless type anti-stain rust preventive oil composition of the present invention can secure both the anti-stain performance and the anti-rust performance even if a processing oil such as a cutting oil is mixed. . Therefore, the use of the stain-preventing rust-preventive oil composition of the present invention makes it possible to prevent rust after processing metals by various processing methods simply by applying rust-preventive oil. Since there is no need to provide any special equipment for washing and removing the processing oil and it is not necessary to frequently change the rust preventive oil, this composition is a practically useful anti-stain rust preventive oil composition.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C10M 149: 06 133: 08) C10N 20:02 30:12 40:20

Claims (4)

[Claims] 1. An ashless anti-stain rust preventive oil composition comprising the following three components: (A) alkenyl succinimide or a derivative thereof: 1 to 30% by mass, (B) amino alcohols: 0.1 to 20 % By weight, and (C) base oil: 50
９８98.9% by mass. 2. The alkenyl succinimide of component A, having a butenyl group having a molecular weight of about 900 to 6000,
2. The ashless anti-stain rust-preventive oil composition according to claim 1, wherein the composition has a nitrogen content of 0.5 to 3% by mass. 3. The ashless type anti-stain rust preventive oil composition according to claim 1, wherein a secondary amine or a tertiary amine amino alcohol having 1 to 6 carbon atoms in the alkyl group is used as the amino alcohol of the component B. Stuff. 4. A mineral oil which is used as a base oil for rust preventive oil as a base oil of component C, and has a viscosity at 40.degree.
^{2. The} ashless anti-stain rust-preventive oil composition according to claim 1, wherein said oil composition has a range of 5 to 20 mm ² / s.