JPH1180769A - Lubricant composition for water-soluble metal processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition having a combination of chip dispersibility and defoamability by including a specific aromatic diamine- polyoxyalkylene adduct and/or specific alicyclic diamine-polyoxyalkylene adduct. SOLUTION: This composition is obtained by including pref. 1.5-40 wt.% of an aromatic diamine polyoxyalkylene adduct of formula I [R<1> to R<3> are each H or (A)m -H; A is an oxyalkylene or polyoxyalkylene; (m) and (n) are each >=1] and/or an alicyclic diamine polyoxyalkylene adduct of formula II; wherein the (poly)oxyalkylene is pref. oxyethylene and/or oxypropylene, the addition number of moles being pref. 1-4. The compound(s) of formula I and/or formula II is incorporated pref. at 0.005-0.2 wt.% in a coolant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-soluble oil agent for metal working such as cutting, grinding, and plastic working, and more particularly to dispersibility of chips and defoaming.

[0002]

2. Description of the Related Art Aqueous oil solutions for gold image processing are generally mineral oil,
Fats and oils, extreme pressure additives, surfactants, defoamers, metal anticorrosives,
The composition is prepared by appropriately mixing an antioxidant, an antiseptic / antifungal agent and the like according to the purpose. The water-soluble cutting / grinding oil is usually used after being diluted 10 to 100 times with water, and this diluted water is called a coolant. The coolant is required to have a performance (temporary performance) for improving the machinability and a workability and other performances (secondary performance). The secondary performance is that the dispersibility of the chips is good, that dirt does not adhere to the work and the surroundings of the machine, that it has good rust prevention, that it has good foaming properties, that it does not easily deteriorate, and that it does not generate bad odors. And the like.

[0003]

In particular, chips generated during machining and dirt caused by the chips, that is, a mixture of chips and an oil agent, other oils (machine lubricating oils, hydraulic oils, etc.), etc. If it adheres to the work, it may cause stickiness, and the work may stick to each other, adhere to a work transporter, or increase the load on the cleaning liquid in the next cleaning process. Further, the aesthetic appearance of the work is impaired, and the commercial value is reduced. In addition, the chip dispersibility is determined by cutting,
Among grinding processes, it is particularly important in a process in which fine chips are generated, such as a grinding process of steel, an aluminum copper alloy, a cemented carbide and the like. Conventional water-soluble oils are added with a nonionic surfactant having a high HLB and an anionic surfactant such as an alkanolamine salt or an alkali metal salt of a higher fatty acid in order to disperse chips in the coolant. However, there is a problem that foaming becomes large and foam overflows from a work table, a coolant and a circulation pit. The purpose of the present invention is
An object of the present invention is to provide a water-soluble metalworking oil composition having both chip dispersibility and defoaming property.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies on the relationship between the dispersibility of chips and the defoaming property of a water-soluble metal working oil, and found that an alkylene oxide adduct of a specific diamine was defoamed. The inventors have found that the present invention has excellent chip dispersibility while maintaining the properties, and has completed the present invention.

[0005] The water-soluble metal working oil composition of the present invention comprises:
It contains at least one of an aromatic diamine polyoxyalkylene adduct represented by the general formula (1) and an alicyclic diamine polyoxyalkylene adduct represented by the general formula (2) shown in the claims. It is characterized by doing. However, in the general formulas (1) and (2), R ₁ , R ₂ or R ₃ is a hydrogen atom or (A) _m -H, A is an oxyalkylene group or a polyoxyalkylene group, and m is In the above (A) _n -H, A is an oxyalkylene group or a polyoxyalkylene group, and n is an integer of 1 or more (particularly 1 to 20). The above (A) _m -H and (A) _n -H may be the same or different. Further, R ₁ , R ₂ and R
_When two or more of ₃ are (A) _m -H groups, these (A) _m -H groups are usually the same, but may be different. In general formula (1), the position at which two aminomethyl groups are formed on the aromatic nucleus (benzene nucleus) may be at the ortho position, the meta position or the para position, but is usually at the meta position. In the general formula (2), the position at which two aminomethyl groups are formed in the alicyclic 6-membered ring compound may be any position, but is usually 3 to 1 (meta equivalent). Position).

The "oxyalkylene" in the above oxyalkylene group or polyoxyalkylene group can be oxyethylene, oxypropylene, oxybutylene or the like, among which oxyethylene or oxypropylene is preferable. This oxyethylene or oxypropylene is preferable because of its high hydrophilicity and excellent solubility and dispersibility in water. Further, it may be a mixed group of oxyethylene and oxypropylene. The number of moles added is preferably from 1 to 4. If this exceeds 5, the defoaming property is reduced.

The composition of the present invention contains the above aromatic diamine polyoxyalkylene adduct and / or the above alicyclic diamine polyoxyalkylene adduct, an anionic surfactant and water, and makes the whole composition 100 parts by weight. In this case, the addition amount of the aromatic diamine polyoxyalkylene adduct and / or the alicyclic diamine polyoxyalkylene adduct is 0.5 to 50 parts by weight, preferably 1 to 50 parts, more preferably 1.5 parts by weight. To 40 parts by weight. This is because in these ranges, the chip dispersibility and the defoaming property are excellent.

The content of the above-mentioned aromatic diamine polyoxyalkylene adduct is 0.001 to 5 in the coolant.
%, Preferably 0.005% by weight.
~ 0.2% by weight. If the content is less than 0.001% by weight, there is no effect of improving the performance, and if the content exceeds 1% by weight, the effect remains unchanged and is uneconomical. The above compounds may be formulated in a water-soluble metal working oil stock solution,
It may be added to the coolant. The water-soluble metal working oil composition of the present invention contains the above compound as an essential component, but includes mineral oil, oil and fat, extreme pressure additive, surfactant, defoamer, metal anticorrosive, antioxidant, Preservatives and the like can be arbitrarily selected from those used in conventional oils and can be blended and used. The water-soluble metalworking oil composition of the present invention is produced by mixing each component.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The water-soluble metalworking oil composition of the present invention will be described in more detail with reference to Examples and Comparative Examples. (1) Composition of water-soluble metalworking oil agent Tables 1 and 2 show the compositions of Examples 1 to 9 and Comparative Examples 1 to 7, respectively. The numerical values indicating the compositions in Tables 1 and 2 are parts by weight.

[0010]

[Table 1]

[0011]

[Table 2]

In Tables 1 and 2, "MXDAEO2"
Is an adduct of 2 moles of oxyethylene of meta-xylene diamine shown in the following (3), wherein 1 mole of oxyethylene is added to each amino group for a total of 2 moles;
"BACEO2" is a 1,3-type represented by the following (4).
This is an adduct of bis (aminomethyl) cyclohexane with 2 moles of oxyethylene.
In this case, a total of 2 moles were added and formed.

[0013]

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[0014]

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"MXDAEO4" is an adduct of metaxylenediamine with 4 moles of oxyethylene shown in the following (5), in which 2 moles of monooxyethylene are added to each amino group for a total of 4 moles, BACEO4 "
Is a 4-mol adduct of oxyethylene of 1,3-bis (aminomethyl) cyclohexane shown in the following (6), in which 2 mol of monooxyethylene is added to each amino group for a total of 4 mol. is there.

[0016]

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[0017]

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The "amide A" is an amide composed of coconut fatty acid and diethanolamine (molar ratio: 1: 1), and the "alkylamine B" is a 3-mol oxyethylene adduct of tallow alkylpropylenediamine. The preservative is hexahydro-1,3,5-tris (2-hydroxyethyl) -s-triazine, and the nonionic surfactant A is nonylphenylpolyoxyethylene ether (E
O: 2 mol), and the nonionic surfactant B is nonylphenyl polyoxyethylene ether (EO: 6 mol).

(2) Performance Test Method A performance test was conducted to clarify the performance of the water-soluble metal working oil composition of the present invention. Chip dispersibility 100 ml of a 2% aqueous sample solution is placed in a 100-ml graduated cylinder equipped with a stopper, 3 g of chip (ground powder) is added, and the mixture is shaken lightly up and down. Make it familiar. Next, it is shaken up and down and allowed to stand still, and the chips floating on the liquid surface are settled at the bottom of the cylinder while shaking the cylinder. After about 1 hour, the volume (m
l) was measured. In this test method, the smaller the sedimentation volume of the chips, the better the chip dispersibility.

Defoaming property 50 ml of a 1% aqueous solution of a sample was taken in a 100 ml graduated cylinder equipped with a stopper, shaken vigorously up and down and allowed to stand, and the time until bubbles disappeared was measured. In this test method, the shorter the bubble elimination time, the better the vesicle properties are evaluated.

(3) Performance Evaluation Results Table 3 shows the results of the above performance tests.

[0022]

[Table 3]

According to the results, in the case of the amide A and the alkylamine B (Comparative Examples 3, 4, 6, and 7 respectively), the chip dispersibility was slightly poor, but the defoaming property was extremely poor. When no amine and amide were contained (Comparative Examples 1 and 5), the defoaming property was very excellent as in the case of the product of this example, but the chip dispersibility was extremely poor. On the other hand, all of the products of this example (Examples 1 to 9) are excellent in chip dispersibility and defoaming property, and the two performances are extremely well-balanced. In addition, there was almost no difference in performance between the predetermined aromatic compound (Examples 1 and 4) and the alicyclic compound (Examples 2 and 5), and both showed excellent performance as compared with Comparative Examples. . Similar results were obtained when both were mixed (Example 3). Further, when 0.1 part by weight of the predetermined aromatic compound was used (Comparative Example 2), the effect was hardly recognized, but as the amount increased to 3, 20, and 40 parts by weight, the dispersibility of the chips was improved. (Examples 1, 6, and 7). In addition, even when only the anionic surfactant is used (Examples 1 to 7) or when the nonionic surfactant is blended with the anionic surfactant (Examples 8 and 9), the same excellent performance is obtained. showed that. Furthermore, the oil-based compositions containing a large amount of spindle oil and a small amount of water (Examples 8 and 9) also showed excellent performance.

[0024]

According to the water-soluble metal working oil composition of the present invention, the dispersibility of chips and the defoaming property are excellent, and the balance between the two properties is extremely good. According to the water-soluble metal working oil composition of the second invention, excellent chip dispersibility and defoaming property can be reliably ensured, and the composition can be inexpensive.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C10N 30:18 40:22 (72) Inventor Takashi Nakajima 1580 Tabata, Samukawa-cho, Koza-gun, Kanagawa Prefecture Inside Yushiro Chemical Industry Co., Ltd.

Claims (2)

[Claims] 1. An aromatic diamine polyoxyalkylene adduct represented by the following general formula (1) and / or an alicyclic diamine polyoxyalkylene adduct represented by the following general formula (2): A water-soluble metal working oil composition comprising: Embedded image Embedded image (However, in the above general formulas (1) and (2), the above R
₁ , R ₂ or R ₃ is a hydrogen atom or (A) _m -H;
A is an oxyalkylene group or a polyoxyalkylene group, m is an integer of 1 or more, and the A of the above (A) _n -H
Is an oxyalkylene group or a polyoxyalkylene group, n
Is an integer of 1 or more. ) 2. “Oxyalkylene” in the oxyalkylene group or polyoxyalkylene group is oxyethylene or oxypropylene, or a mixed group of oxyethylene and oxypropylene, and the number of added moles is 1 to 4. The water-soluble metal working oil composition according to claim 1.