KR860001122B1 - Water-based metal working fluid - Google Patents

Abstract

Water-based fluid for metal working is prepd. for use as cutting oil, thermal treating oil. Ther fluid contains component A and component B. The component A is polyoxymethylene alkyl amine and the component B is zinc phosphate or polyoxyethylene phosphoester. This water-based fluid for metal working improves the quality, and is not harmful to the human body.

Description

WATER-BASED METALWORKING FLOW

In general, metalworking fluids have suppressed alteration by adding preservatives, especially organic preservatives.

In any case, the deterioration inhibitory effects of these organic preservatives change depending on the type of microorganism.

That is, they show sufficient alteration inhibitory effects on certain microorganisms, but their effects are insufficient on others.

In addition to the use of organic preservatives, it is necessary to choose one that is appropriate, taking into account the form of the microorganisms, but they lack the common purpose properties.

Some of the organic preservatives are killed by microorganisms.

In the case of such organic preservatives, fresh preservatives should be added frequently because their corrosion inhibitory ability decreases in a short time.

This requires a lot of labor and time for the production of machine parts and increases the problem of increasing the cost of production.

Furthermore, most of the organic preservatives are harmful to the human body.

This can cause problems such as rough skin or rashes.

As another method of sterilization, metalworking fluids are known in which metalworking animals used for a predetermined time are simultaneously supplemented with various adducts which have been heated to a relatively high temperature and lost by heat treatment to kill anaerobic bacteria in the metalworking animals. .

This method also requires a lot of labor and time, and furthermore, no deterioration can be obtained.

One method of contacting metalworking fluids with metal cobalt has been proposed to suppress deterioration. (See Japanese Patent No. 22693/1982).

This method, however, requires special equipment in its practice.

The present invention attempts to overcome the various problems described above, and one object of the present invention is to provide a water-based metalworking fluid that is thoroughly mixed without the use of other devices and also has an excellent deterioration inhibiting ability.

The present invention relates to the following.

Water-based metalworking fluid comprising the following components (A) and (B).

Component (A): Compound represented by general formula (I)

m+n

24).(Wherein R ¹ is alkyl and 3

m + n

24).

Component (B): at least one compound is selected from the group consisting of compounds represented by general formula (II).

(R ² , R ³ , R ⁴ and R ⁵ represented in Formula II may be the same or different, and are each aryl based unless they are alkyl based.)

Phosphorus compounds are represented by general formula (III).

a+b

24이고), 그리고 인화합물 일반식(Ⅳ)에 의해서 표시된다.Wherein R ⁶ and R ⁷ are each alkyl and 0

a + b

And phosphorus compound is represented by the general formula (IV).

(Here all symbols are defined as above).

The compound represented by general formula (I) is polyoxymethylene alkylamine.

These polyoxymethylene alkylamine ethane alkyl systems preferably contain 8 to 20 carbon atoms.

These acrylics are straight or branched, including one jade decyl, dodecyl, tetradecyl, hexadecyl, and the like.

In the general formula (I), the sum of m and n is 3 to 24, and m and n are each preferably 2 to 8 and more preferably 2 to 5, respectively. Although m and n are different, they are usually the same.

Examples of suitable compounds represented by general formula (I) are as follows.

The compound represented by formula (II) is zinc phosphate. The alkyl system represented by R ² to R ⁵ preferably contains 3 to 12 carbon atoms although not critical.

The Ari-il is also not critical, but includes a surrogate Ari-il.

Substituents in this substituted aryl system are preferably acrylic.

Typical examples of the compound represented by the general formula (II) include R ² , R ³ , R ⁴ and R ⁵ , most of which are sec-hexyl or sec-alkyl containing 5 to 5 carbon atoms or less, or R ² , R ³ , R ⁴ and R ⁵ are isobutyl and n-amyl or compounds in which most of R ² , R ³ , R ⁴ and R ⁵ are isoyl or alkylaryl.

The phosphorus compound represented by general formula (III) is polyoxyethylene phosphate ester, dipolyoxyethylene phosphate ester, etc.

The compound represented by general formula (IV) is polyoxyethylene phosphate ester, dipolyoxyethylene phosphate ester, etc.

Alkyl systems in formulas (III) and (IV), although not critical, preferably contain 14 to 16 carbon atoms, and the sum of a and b is 0 to 2, preferably a and b are 0 to 6, respectively. .

These phosphorus compounds are preferably water soluble and oil soluble.

Examples of suitable phosphorus compounds represented by formulas (III) and (IV) are as follows.

Two or more of each of the compounds represented by general formulas (I) to (IV) are appropriately selected and used in combination with each other.

The term "metalworking fluid of water base" as used herein relates to, for example, cutting oil, rolling oil and heat treatment oil.

Cutting oil An oil in the form of an emulsion mainly formed of mineral oil. They are classified as emulsifiers, corrosion inhibitors, preservatives, stabilizers and water, and soluble oils formed mainly of large surface active agents, and small amounts of mineral oils, corrosion inhibitors and water.

Moreover, fluids in the form of chemical solutions may be used.

The fluid in the form of a chemical solution contains at least one compound selected from the group consisting of triethanolamine monoethanolamine, and N-methyldiethanolamine in place of the mineral oil described above.

Mineral oils such as paraffin-based oils and naphrene-based oils, and surface-active compounds such as amines such as triethanolamine are referred to as the following oils.

The compounds represented by the formulas (I) to (IV) are also effective as emulsifiers that can be used in cutting oils in oily form and as surface active agents that can be used in cutting oils in soluble form.

Some of the rolling oils are oily liquids.

One example of heat treated oil is polyethylene glycol and water.

In the use of water-based metalworking fluids, black stone to the appropriate range of water is diluted, for example from 5 to 100 times, usually from 10 to 50 times, and then stored in tanks, for example through tanks and machine tools used. Circulated.

The above-mentioned portion (A) or (B) mixes the water-based metalworking fluid with water in a just manner before or after dilution.

Based on the metalworking flow of the water base before dilution with water, the base oil to be mixed is 30 to 90% by weight, preferably 40 to 80% by weight, and the components (A) and general formula ( The amount of the compound of I) is 2 to 40% by weight, preferably 3 to 30% by weight, and the component (B) to be mixed, component (B) which is at least one member of the compounds of formulas (II) to (IV). The amount of is from 2 to 30% by weight, preferably 3 to 20% by weight.

If necessary, other commonly used additives may be added to the metalworking flow of the present invention waterbase.

For example, nonionic surface activity such as sodium lauryl sulfate, sorbitan monoorate, polyoxyethylene alkyl ether, polyoxyethylene nonyl phenyl ether, extreme pressure components such as chlorinated paraffin Agonists, sulfides such as dibutyl sulfide, tricresyl phosphate, and tributyl phosphate may suitably be added to the water based metalworking fluid.

In the metalworking fluid of the present invention, the alteration effect is not limited to specific microorganisms, and the increase in a wide variety of microorganisms is suppressed.

As such, the metalworking fluid of the present invention is free from deterioration and has a long service life. The metal tax sharing animal of the waterbase of the present invention is highly safe for the human body without causing pollution such as the occurrence of an unpleasant odor.

Moreover, it does not require special equipment because the above-mentioned components can be directly mixed as they are as the metalworking fluid of the raw base. Therefore, the metalworking fluid of the present invention waterbase is very useful in the metalworking field.

The present invention will be described in more detail with reference to the following examples and comparative examples.

[Examples 1-15 and Comparative Examples 1-8]

A series of emulsions are prepared by adding a predetermined amount of mixture to fresh mineral oil (mechanical oil) as an oil base, as shown in Table 1.

Each prepared metal shared animal as described above is diluted 30-fold with water and then the resulting solution of 20 milliliters is placed in a test tube.

200 milligrams of cast iron cutting fine grains and a drop of denatured oil are added to the test tube, and the incubation at the stationary state is continued for 10 days at 30 ° C. Cast iron fines are mixed into the metalworking flow during metalworking. The number of bacteria that can survive after incubation is determined and the results are shown in Table 1. Dizzy bacteria and bacteria with reduced sulfates are particularly responsible for the alteration of metal tax sharing.

In determining the number of viable bacteria, the following culture medium and culture method are employed.

(1) Anaerobic bacteria (determined by the agar culture substrate method using clear bouillon).

Media composition: 0.5 meat, 1.0% peptone, 0.5% sodium chloride, 1.5% agar (pH: 7.0)

(2) Anaerobic bacteria (determined by roll tube method using VL basic culture medium).

Media composition: 1.0% peptone, 0.5% yeast tablet, 0.14% heart tablet, 0.2% glucose, 0.045% potassium dihydrogen phosphate, 0.09% ammonium sulfate compound, 0.09% sodium chloride, 0.009% magnesium sulfate (anhydrous salt), 0.09% Calcium chloride (anhydrous salt), 1.5% agar, 0.03% cystine hydrochloride, 0.4% sodium hydroxide (pH: 7.0)

(3) Sulfate-Reducing Bacteria (by the Rolling Tubing Method) A limited amount of starch medium is used in addition to agar of 1.5%. (See American Culture Collection, 12th edition, page 331 (1976)).

[Examples 16-20 and Comparative Examples 9-11]

As shown in Table 1, a series of soluble metalworking flows are prepared by mixing a predetermined amount of the compound and the caustic.

Thereafter, the procedure is repeated as in Examples 1-15, and the number of bacteria that can survive after incubation is determined.

The results are shown in Table 1.

TABLE 1

Note:

7. Most of the R ² , R ³ , R ⁴ and R ⁵ therein is a dialkyl phosphate zinc secioalkyl (sec-alkye) containing a carbon atom (street name: rubirisol 677, nipuribazole) Company products).

8. (C ₁₂ H ₂₅ O) ₂ POH

9. (C ₆ H ₁₃ O) ₂ POH

10. (C ₁₂ H ₂₅ O) ₂

11. [C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₂ ] ₂ POH

12. The number of viable bacteria when dirty oil was added was as follows.

Anaerobic bacteria: 2.5 × 10 ⁵ per milliliter

Anaerobic bacteria: 1.1 × 10 ⁴ per milliliter

Sulfate Reducing Bacteria: 5.3 × 10 ² per milliliter

Claims (10)

A water-based metal pore fluid comprising a component (A) and (B) as described below.

Where R ¹ is alkylge and 3

m + n

24). Component (B): At least one compound selected from the group consisting of compounds represented by formula (II).

(Where R ² , R ³ , R ⁴ and R ⁵ are each alkyl or aryl, and they may be the same or different), phosphorus compounds represented by the general formula (III)

Wherein R ⁶ and R ⁷ are each alkyl based and 0

a + b

14), and the phosphorus compound is represented by the general formula (IV).

(Where R ⁶ , R ⁷ , and a + b are defined as above). The water-based metal pore fluid of Claim 1 whose compound represented by General formula (I) is a compound of following formula.

The water-based metal pore fluid of Claim 1 whose compound represented by General formula (I) is a compound of following formula.

The water-based metalworking fluid of claim 1, wherein the compound represented by the general formula (I) is a compound of the following formula.

The water-based metal-porous fluid of Claim 1 whose compound represented by general formula (I) is a compound of following formula.

A water according to claim 1, wherein the compound represented by the general formula (II) is a zinc dithiophosphate which is a sec-alkyl type wherein most of R ² , R ³ , R ⁴ and R ⁵ contain 6 carbon atoms. Metalwork flow in the base. The metalporous fluid of waterbase according to claim 1, wherein the compound represented by the general formula (III) is a compound of the following formula. (C ₁₂ H ₂₅ O) ₂ POH The water-based metal porous fluid according to claim 1, wherein the compound represented by the general formula (III) is a compound of the following formula. (C ₆ H ₁₃ O) ₂ POH The water-based pore-metal pore flowing according to claim 1, wherein the compound represented by the general formula (III) is a compound of the following formula. [C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₂ ] ₂ POH The water-based pore-metal pore flowing product according to claim 1, wherein the compound represented by the general formula (IV) is a compound of the following formula.