JPH083108B2 - Water soluble cutting oil - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water-soluble cutting oil.

[Prior Art] Conventionally, in order to prevent the deterioration of water-soluble cutting oils due to putrefaction, antiseptic and antifungal agents are added to water-soluble cutting oil components, and substances having antibacterial properties such as amines, amides and amino acids are used. It has been known.

[Problems to be Solved by the Invention] However, these preservatives, fungicides, amines, amides,
Antibacterial substances such as amino acids cannot exert sufficient efficacy for a long time. In addition, if used in a large amount, it may affect the human body and reduce the rust preventive property.

[Means for Solving Problems] The present inventors prevent microbial deterioration for a long period of time,
The present invention has been achieved as a result of intensive studies on a water-soluble cutting oil that has little influence on the human body and does not deteriorate rust prevention. That is, the present invention has the general formula (In the formula, R ₁ is a C _{2 to} C ₂₄ hydrocarbon group, R ₂ is a C _{1 to} C ₈ alkylene group, A is a C _{2 to} C ₄ alkylene group, n is an integer of 1 or more, M
Is a cation of H, alkali metal, alkaline earth metal, ammonium or amine. ) Is a water-soluble cutting oil containing a compound represented by the formula (1).

In the general formula, as the C _{2 to} C ₂₄ hydrocarbon group of R ₁ ,
Alkyl group or alkenyl group (butyl group, hexyl group, 2-ethylhexyl group, octyl group, dodecyl group,
Stearyl group, oleyl group, etc.); cycloalkyl group,
(Eg, cyclohexyl group) and aromatic hydrocarbon groups (eg, aryl group such as phenyl group and naphthyl group; aralkyl group such as benzyl group; alkaryl group such as butylphenyl group). Of R ₁ , preferably C _{4 to} C ₁₈
Is an alkyl group.

Examples of the alkylene group for R ₂ include C _{1 to} C ₈ alkylene groups such as methylene, ethylene and trimethylene, and preferably C _{1 to} C ₃ alkylene groups.

The alkylene group A C ₂ -C _4, the ethylene group, propylene group and butylene group. Preferred are ethylene group and propylene group.

Examples of the alkali metal of M include Li, Na and K; examples of the alkaline earth metal include Ca, Mg, Sr and Ba; examples of the amine cation include alkyl or alkenylamines (methylamine, dimethylamine, ethylamine, diethylamine, Butylamine, octylamine, etc.), alicyclic amine (cyclohexylamine, etc.) heterocyclic amine (morpholine, etc.), alkanolamine (monoethanolamine, diethanolamine, triethanolamine,
Isopropanolamine, etc.); cations of amines such as alkylene oxide (ethylene oxide, propylene oxide, etc.) adducts of the above amines [hydroxyethylbutylamine, hydroxyethylcyclohexylamine, hydroxypropylcyclohexylamine, etc.]. Among M, preferred are alkanolamine cations and amine alkylene oxide adduct cations.

 n is preferably 1.

Specific examples of the alkylene oxide addition type amino acid compound of the compound represented by the general formula (1) include butylamine.
EO (1) sodium acetate, butylamine EO (1) propionic acid
Na salt, butylamine EO (2) acetic acid diethanolamine salt, octylamine EO (1) acetic acid Na salt, octylamine
Examples include PO (1) monoethanolamine propionate, laurylamine EO (1) hydroxyethylcyclohexylamine acetate, oleylamine PO (1) acetic acid Na salt, and oleylamine EO (1) monoethanolamine propionate. In the above, EO is ethylene oxide, PO
Is propylene oxide and EO (2) is an EO2 mole adduct.

The alkylene oxide addition type amino acid (salt) represented by the general formula (1) can be produced by a known method. For example, primary amine compounds can be used with or without catalyst (NaOH, KOH
Etc.) at a temperature of 50 to 200 ° C. to add an alkylene oxide such as ethylene oxide and propylene oxide to give an amineoxyalkylene ether. The alkylene oxide-added product is a mixture of a primary amine, a secondary amine, and a tertiary amine, and thus can be distilled under reduced pressure to obtain an alkylene oxide-added secondary amine having one active hydrogen. . Then, the secondary amine compound is reacted with a monochlorocarboxylic acid such as sodium chloroacetate usually at 30 to 80 ° C. and after addition reaction of acrylonitrile or methyl acrylate and methyl methacrylate at 30 to 80 ° C., It can be obtained by hydrolysis with NaOH and KOH. The amino acid of the general formula (1) produced by using monochlorocarboxylic acid is filtered to remove chlorine ions after removing water, and an alkaline substance (alkali metal hydroxide, carbonate, alkaline earth metal hydroxide, ammonia, Amine) can be neutralized by a known method to obtain a salt.

The compound represented by the general formula (1) can be used alone in grinding and light cutting mainly for cooling, but mineral oil, oiliness agent, rust inhibitor, extreme pressure agent, emulsifier, polyalkylene glycol ether, etc. It can be used by being contained in the oil agent assembled in.

As the above mineral oil, spindle oil (Vis 40 ° C: 5 to 100cs
t), machine oil (Vis40 ℃: 2 to 1650cst), turbine oil (V
is40 ℃: 28-90cst) and naphthenic oils. Of these, spindle oil (Vis 40 ° C: 5
~ 20cst).

Oiliness agents include fatty acids (unsaturated fatty acids such as oleic acid, undecylenic acid, erucic acid, linoleic acid, linolenic acid and ricinoleic acid; saturated fatty acids such as hexanoic acid, carlylic acid, lanolinic acid, palmitic acid and stearic acid), fatty acids Esters (esters of the above fatty acids with monohydric alcohols such as methyl alcohol, ethyl alcohol, butyl alcohol, 2-ethylhexyl alcohol, octyl alcohol, lauryl alcohol, oleyl alcohol and stearyl alcohol; ethylene glycol, glycerin, trimethylolpropane, penta (Elyslit, sorbit, sorbitan, sorbite, esters with divalent to octavalent polyhydric alcohols such as sucrose)
Can be given. Of these, preferred are saturated or unsaturated fatty acids and polyhydric alcohol esters.

As a rust preventive agent, a fatty acid amide (an amide of the above fatty acid with an alkanolamine such as monoethanolamine, diethanolamine, isopropanolamine; an alkylamine amide such as methylamine, ethylamine, propylamine, octylamine), an aromatic carboxylic acid ( Nitrobenzoic acid, benzoic acid, cinnamic acid, etc.) and the like. Of these, preferred are fatty acid amides.

As extreme pressure agents, chlorinated paraffin, chlorinated stearic acid, sulfurized fats and oils, sulfurized fatty acid esters and alkyl phosphate esters (propyl, butyl, octyl, lauryl, stearyl, oleyl, wool alcohol, etc.,
Di, triester) and the like. Of these, preferred are sulfurized fatty acid esters. As an emulsifier, an ethylene oxide adduct of an alkylphenol having an alkyl group usually having 2 to 15 carbon atoms (the ethylene oxide addition mole number is usually 1 to 10), an ethylene oxide adduct of a higher alcohol having an alkyl group having 6 to 22 carbon atoms, and a petroleum sulfonate. , Alkanolamine salts of saturated and unsaturated fatty acids in which the alkyl group has 12 to 22 carbon atoms. Of these, preferred is an ethylene oxide adduct of alkylphenol. Polyalkylene glycol ethers include ethylene oxide and propylene oxide adducts of aliphatic alcohols (alcohols such as methanol, ethanol, propanol, butanol, octanol and oleyl alcohol), polyhydric alcohols (the above divalent to octavalent polyhydric alcohols). Ethylene oxide and propylene oxide adducts thereof. Of these, ethylene oxide and propylene oxide adducts of polyhydric alcohols are preferable.

The amount of the compound represented by the general formula (1) is usually 1 to 80%, preferably 5 to 80%. When the compound represented by the general formula (1) is diluted with water to 0.1% or more, preferably 0.2% or more in an aqueous solution, it can be used as a water-soluble cutting oil with little deterioration by microorganisms.

The target processing of the water-soluble cutting oil containing the compound represented by the general formula (1) is steel, cast iron, aluminum alloy,
Cutting, grinding and drawing of copper, brass, alloy steel, etc.
Examples include plastic working such as tube drawing and extrusion. The machines used are centralized tank type transfer machines, automatic lathes, NC lathes, drilling machines, machining centers, grinding machines, special machines, etc.

[Examples] The present invention will be specifically described below with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples. Unless otherwise specified,% in the examples means% by weight.

Examples 1-9, Comparative Examples 1-5 Example 1 Butylamine PO (1) Acetic acid Na salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% is mixed to obtain a cutting oil of the present invention. It was

Example 2 Butylamine EO (2) Acetic acid Na salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 3 Octylamine EO (1) Acetic acid Na salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 4 Octylamine EO (1) propionic acid Na salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 5 Laurylamine EO (1) Na salt of acetic acid 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 6 Laurylamine EO (1) propionic acid triethanolamine salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 7 Laurylamine PO (1) propionate Diethanolamine salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 8 Laurylamine EO (1) Hydroxyethylcyclohexylamine propionate 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Example 9 Oleylamine EO (1) Hydroxyethylcyclohexylamine acetate 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% was mixed to obtain a cutting oil of the present invention.

Comparative Example 1 N-lauryl-β-iminodipropionic acid diNa salt 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% Comparative Example 2 N-lauryl-β-iminoacetic acid diNa salt 20% Polyethylene Glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% Comparative Example 3 Lauric acid diethanolamide (1: 2) 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% Comparative Example 4 Octyl acid diethanolamide (1: 2) 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% Comparative Example 5 Laurylamine EO (6) 20% Polyethylene glycol 20% Surfactant (nonylphenol EOA) 5% Water 55% Examples 10-15 Cutting oil A (emulsion type) Mineral oil (Vis40 ° C 9-12cst) 58% Oiliness agent (fatty acid Ester) 15% Extreme pressure agent (sulfurized oil and fat) 2% Emulsifier (nonionic activator) 20% PH adjuster (alkanolamine) 5% Cutting oil B (Soluble type) Mineral oil (Vis40 ° C 9-12cst) 5% Oily Agent (fatty acid) 8% Polyalkylene glycol 15% Nonionic activator 10% PH adjuster (alkanolamine) 15% Water residue Example 10 Cutting oil A 90-95% Butylamine EO (1) Acetic acid Na salt 10-5% Example 11 Cutting Oil A 90-95% Octylamine EO (1) Acetic Acid Na Salt 10-5% Example 12 Cutting Oil A 90-95% Laurylamine EO (1) Acetic Acid Na Salt 10-5% Example 13 Cutting Oil B 80-90% Butylamine EO (1) Acetic acid Na salt 20-10% Example 14 Cutting oil B 80-90% Octylamine EO (1) Acetic acid Na salt 20-10% Example 15 Cutting oil B 80-90 % Laurylamine EO (1) Acetic acid Na salt 20 to 10% Test Example 1 Properties of Examples 1 to 9 and Comparative Examples 1 to 5 The results of testing the ability are shown in Table-1.

Next, Tables 2 and 3 show the performance of Examples 10 to 15 in which the compound of the present invention represented by the general formula (1) was added to the emulsion cutting oil A and the soluble cutting oil B.

The concentrations of the test solutions of Examples 1 to 9 and Comparative Examples 1 to 5 are 2.0%.
As an aqueous solution, the initial PH is 9 to 9 with NaOH and N ₂ SO ₄ aqueous solution.
Adjusted to 5. The concentrations of the test liquids of Examples 10 to 15 are cutting oil A.
In the case of :; diluted with water 20 times; with cutting oil B: diluted with water 50 times.

 The performance was evaluated by the following test methods.

(1) Spoilage deterioration test 3 mL of spoiled chopped powder and 2 dried corn flour in 100 ml of each test solution
g, put 1 ml of spoilage liquid (having more than 10 ⁶ bacteria / ml), 37
℃ Place it in an egg rotator and change the PH over time (the value is the PH value)
The number of general bacteria on the 14th day (numerical value is the number / ml) was measured. The number of general bacteria was cultivated using ordinary agar medium.

(2) Anticorrosion Each test solution was dropped onto a cast iron plate (FC-25) that had been polished and washed,
The rusting state after 24 hours at room temperature was observed.

[Effects of the Invention] The water-soluble cutting oil containing the compound represented by the general formula (1) of the present invention prevents deterioration of microorganisms for a long period of time, and prevents generation of bad odor due to putrefaction and deterioration of rust preventive property. The work environment can be improved.

Conventional water-soluble cutting oils have added antiseptic and antifungal agents to their components in order to prevent spoilage, but they cannot prevent spoilage deterioration over a long period of time, causing deterioration in machinability and rust prevention, This will cause the work environment to deteriorate, such as slime clogging of pipes in the circulation system and generation of bad odor due to decay. Further, if a large amount of these is used, there is an effect on the human body and an effect on rust prevention. Further, conventional antibacterial substances such as amines, amides, amino acids, etc. are not sufficiently satisfactory in terms of rot resistance. However, the cutting fluid of the present invention solves such a problem.

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Claims (1)

[Claims] 1. A general formula (In the formula, R ₁ is a C _{2 to} C ₂₄ hydrocarbon group, R ₂ is a C _{1 to} C ₈ alkylene group, A is a C _{2 to} C ₄ alkylene group, n is an integer of 1 or more, M
Is a cation of H, alkali metal, alkaline earth metal, ammonium or amine. ) A water-soluble cutting oil comprising a compound represented by