JP2014210763A - Water-soluble functional fluid with rot resistance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-soluble functional fluid that has sufficient aseptic and bactericidal performance, and also has reduced adverse effect on processed materials.SOLUTION: A water-soluble functional fluid comprises benzotriazol amine salt and/or tolyltriazole amine salt in a mass% concentration of 3000 ppm or more.

Description

  The present invention relates to a novel technique for imparting antiseptic and bactericidal properties to water-soluble functional fluids such as water-soluble cutting oils, water-soluble grinding oils, and water-soluble cleaning agents.

  Water-soluble functional fluids such as water-soluble cutting oils, water-soluble grinding oils, and water-soluble cleaning agents are often affected by microorganisms depending on the conditions used, and often lose their original performance due to spoilage.

  For example, in water-soluble cutting oil and grinding oil, by diluting to the concentration used and circulating for a long time, microorganisms enter from the outside, so that the decay progresses and gives off a bad odor. Diluted liquid separation causes troubles in cutting work, and rust prevention performance, which is an important performance, is also reduced, causing rusting of processing machines and workpieces. In addition, the amount of stock solution to be replenished due to the decrease in concentration increases, and the cost also increases. The same applies to water-soluble cleaning agents, and the original functions such as a decrease in concentration and a decrease in detergency are lost due to decay. Similar problems include water-soluble plastic processing oil (for bending, pressing, forging, rolling, pressure adjustment, etc.), water-soluble cutting oil, water-soluble polishing oil (glass, cutting of silicon, polishing oil, etc.) It also occurs in various water-soluble functional fluids such as water-soluble hydraulic oil, cooling water for air conditioning, and latex products.

  In order to preserve these water-soluble functional fluids, an amine-based or thiazoline-based antiseptic / bactericidal agent is usually added to the fluid (Patent Document 1, etc.). However, these preservatives and disinfectants are expensive and have high skin irritation, so the amount added is as low as a few hundred ppm or less at the concentration used, and the sterilization performance initially set during actual use It was often found that they were not fully satisfied. In addition, oil agents that use primary amines as antiseptic disinfectants exhibit antiseptic and disinfecting properties at high pH, so there is a risk of discoloration of non-ferrous metals (particularly aluminum).

  Alternatively, antiseptic / bactericidal agents other than amines and thiazolines are also proposed (Patent Document 2, etc.), but applied to water-soluble functional fluids such as water-soluble cutting oils, water-soluble grinding oils, and water-soluble cleaning agents. In some cases, it has not been confirmed whether it has sufficient antiseptic and sterilizing properties, and no influence on the workpiece or cleaning material or on the processing equipment has been confirmed.

  As described above, the conventional antiseptic / disinfectant may not exhibit sufficient antiseptic / sterilization performance when applied to a water-soluble functional fluid, and has an adverse effect on the work material or the material to be cleaned. (Discoloration, etc.) was also a concern.

JP 2011-79956 A Japanese National Patent Publication No. 11-508544

  Therefore, an object of the present invention is to provide a water-soluble functional fluid that has sufficient antiseptic and sterilizing performance and has reduced adverse effects on a workpiece or the like.

In view of the above problems, the present inventors have conducted extensive research and as a result, have obtained the following knowledge.
(1) When a triazole known as a copper alloy corrosion inhibitor is used as an amine salt and the amine salt is added to a water-soluble functional fluid at a predetermined concentration or more, a water-soluble functional fluid having sufficient antiseptic and bactericidal properties is obtained. be able to.
(2) The amine salts of the above triazoles exhibit a sufficient antiseptic and bactericidal effect at a pH in the neutral range, so that they are compared with known amine-based antiseptic and bactericides usually used at high pH. , Adverse effects on workpieces such as aluminum are reduced.
(3) The amine salt of the triazoles has less skin irritation and the like, and can increase the concentration in the water-soluble functional fluid, as compared with known amine-based antiseptic / bactericides.
(4) In addition to the amine salt of the above triazoles, the preservative / sterilizing effect of the water-soluble functional fluid is synergistically improved by further blending alcohol.

The present invention has been made based on the above findings. That is,
1st this invention is a water-soluble functional fluid formed by mix | blending the amine salt of benzotriazole and / or the amine salt of tolyltriazole by the mass% density | concentration of 3000 ppm or more.

  In the present invention, “the amine salt of benzotriazole and / or the amine salt of tolyltriazole is blended at a mass% concentration of 3000 ppm or more” means that the amine salt of benzotriazole is blended at a concentration of 3000 ppm or more, the amine of tolyltriazole Like the form in which the salt is blended at a concentration of 3000 ppm or more, the form in which the component alone is 3000 ppm or more, and the form in which the amine salt of benzotriazole and the amine salt of tolyltriazole are blended at a total concentration of 3000 ppm or more The concept includes a form in which plural kinds of triazoleamine salts have a total concentration of 3000 ppm or more.

  The water-soluble functional fluid according to the first aspect of the present invention includes water-soluble cutting oil, water-soluble grinding oil, water-soluble cleaning agent, water-soluble press oil, water-soluble forging oil, water-soluble rolling oil, water-soluble cutting oil, water-soluble cutting oil It is preferably used as a polishing oil or a water-soluble hydraulic oil.

  In 1st this invention, it is preferable that C6-C15 alcohol is further included. In this case, the “alcohol” may be a monohydric alcohol or a polyhydric alcohol. In particular, at least one selected from 1,2-octanediol, branched alcohol having 14 carbon atoms, branched alcohol having 15 carbon atoms, benzyl alcohol, phenoxyethanol, and diethylene glycol monobutyl ether is preferable.

  The second aspect of the present invention is the use of a water-soluble functional fluid which is adjusted so that the concentration by mass of the amine salt of benzotriazole and / or the amine salt of tolyltriazole is 3000 ppm or more when a water-soluble functional fluid is used. Is the method.

  In the second aspect of the present invention, it is preferable to adjust so that an alcohol having 6 to 15 carbon atoms coexists. The details of “alcohol” are as described above.

  According to the present invention, it is possible to provide a water-soluble functional fluid that has sufficient antiseptic and sterilizing performance and has reduced adverse effects on a workpiece or the like.

  In general, triazoles typified by benzotriazole are commercially available as corrosion inhibitors for copper alloys, and are used at a low concentration of “several hundred ppm or less” when used. However, no antiseptic and bactericidal properties of these series of compounds in water-soluble functional fluids have been found. On the other hand, the present inventors used the triazole as an amine salt, and used the amine salt in a water-soluble functional fluid by adding the amine salt at a concentration higher than the amount of triazoles added as a conventional corrosion inhibitor. The inventors have found that the antiseptic / sterilizing properties required in some cases are sufficiently exhibited, and have completed the present invention.

<Water-soluble functional fluid>
The water-soluble functional fluid according to the present invention is characterized in that a predetermined triazole amine salt is blended at a mass% concentration of 3000 ppm or more. That is, in the present invention, the amine salt of the triazole is added to the water-soluble functional fluid at a concentration higher than the concentration of triazole conventionally used as a rust inhibitor.

1. Triazoles The triazoles used in the present invention are not particularly limited as long as they have a triazole skeleton. For example, triazoles conventionally used as a rust preventive agent can be used. Specifically, they are benzotriazole and tolyltriazole.

2. Amine In the present invention, the above-described triazoles form a salt with an amine. The amine used in the present invention may be any of primary amine, secondary amine, and tertiary amine. Specifically, an amine represented by the following general formula (1) can be used.

In the general formula (1), R ¹ , R ² and R ³ are each independently hydrogen, an alkyl group having 1 to 8 carbon atoms, a hydroxyalkyl group having 1 to 6 carbon atoms, and 6 to 8 carbon atoms. Or an alkylaralkyl group having 6 to 8 carbon atoms. However, the case where R ¹ , R ² and R ³ are all hydrogen is excluded. Note that R ¹ , R ² , and R ³ may be bonded at a terminal via a hetero atom and wound in a ring.

Among these, for example, the alkyl group has 1 to 8 carbon atoms, preferably 1 to 4 carbon atoms, and more preferably 1 to 3 carbon atoms. Specific examples include a methyl group, an ethyl group, a propyl group, an octyl group, and a cyclohexyl group. Among these, a methyl group, an ethyl group, and a propyl group are preferable. The carbon number of the hydroxyalkyl group is 1 or more and 6 or less, preferably 2 or more and 4 or less, more preferably 2 or more and 3 or less. Specific examples include a hydroxymethyl group, a hydroxyethyl group, a hydroxypropyl group, and a 2-methyl 2-hydroxypropyl group. Among these, a hydroxymethyl group and a hydroxyethyl group are preferable. Furthermore, R ¹ , R ² , and R ³ may be bonded to each other through a hetero atom at the ends, and for example, morpholine or the like may be used.

The combination of R ¹ , R ² , and R ³ is not particularly limited, and may be a combination of the same group or a combination of different groups.

  The water-soluble functional fluid according to the present invention is formed by blending the above-described amine salt of a triazole with a concentration by mass of 3000 ppm or more. The lower limit of the amount of the amine salt of the triazole is preferably 5000 ppm or more, more preferably 7000 ppm or more, still more preferably 10,000 ppm or more, and the upper limit is preferably 20.0% by mass or less, more preferably 5.0% by mass. It is as follows. Thus, in this invention, content of the amine salt of the said triazole is increased rather than the conventional triazole content added as a corrosion inhibitor. Thereby, the antiseptic and sterilizing performance of the water-soluble functional fluid can be stably expressed over a long period of time.

  In the present invention, the addition form is not particularly limited as long as the amine salt of the triazole described above is mixed in the water-soluble functional fluid at a predetermined concentration or more. That is, in addition to the above-described form in which the amine salt of the triazole is added to the water-soluble functional fluid, the above-mentioned triazole and amine are separately added to the water-soluble functional fluid, resulting in a water-soluble function. The form which mix | blends the amine salt of triazoles in a fluid may be sufficient.

  The water-soluble functional fluid according to the present invention exhibits high antiseptic and bactericidal properties even in a relatively neutral pH range (pH 7 to 10, preferably pH 7.4 to 9). For this reason, it can be suitably used for a workpiece or a material to be cleaned that is liable to have alkaline corrosion.

  Furthermore, the excellent point of the water-soluble functional fluid according to the present invention is that it has rust prevention not only for non-ferrous metals but also for ferrous metals and that there is almost no inadvertent foaming when used. . That is, in the present invention, by using an amine salt of a triazole, a plurality of functions that have not been conventionally available can be expressed.

  Further, in the past, for the purpose of improving antiseptic properties, for example, primary amines that exhibit antiseptic and bactericidal properties at high pH are used, and there have been concerns about discoloration of aluminum and irritation to the skin. As described above, the triazole derivative can exhibit sufficient antiseptic and bactericidal properties at a substantially neutral pH, reduces adverse effects on the workpiece such as aluminum, and has skin irritation and the like. Few. Furthermore, even when the concentration in the water-soluble functional fluid is increased, it is possible to suppress adverse effects on the workpiece and the operator.

  In addition, as long as the effects according to the present invention are not impaired, it is possible to add conventionally used amine-based preservatives and thiazoline-based preservatives, and further primary amine fatty acid salts, etc. What is necessary is just to adjust suitably according to the development objective. In this case, the amount of the amine salt of the triazole described above can be reduced, and it is economical.

<Application>
The water-soluble functional fluid according to the present invention includes a water-soluble cutting oil, a water-soluble grinding oil, a water-soluble cleaning agent, a water-soluble press oil, a water-soluble forging oil, a water-soluble rolling oil, a water-soluble cutting oil, a water-soluble polishing oil, or It can be applied as a water-soluble hydraulic oil. Depending on the application, base oils, alcohols (glycols) and ethers (glycol ethers), various additives such as fatty acids, surfactants, and other necessary components other than the above-described amine salts of triazoles may be included. .

  As a result of diligent research by the present inventors, by combining the amine salt of the above triazole with a predetermined alcohol in a water-soluble functional fluid, these act synergistically, and the antiseptic and bactericidal properties are dramatically improved. I found out.

  The “alcohol” applied to the water-soluble functional fluid is an alcohol having 6 to 15 carbon atoms. In particular, an aliphatic alcohol having a linear alkyl or alkenyl structure having 6 to 15 carbon atoms or an aromatic alcohol having 6 to 15 carbon atoms is preferable. The alcohol may be a monohydric alcohol or a polyhydric alcohol. Moreover, what has a hetero atom in a molecular chain (alcohol etc. which have an ether bond) may be sufficient. Specifically, 1,2-octanediol, C14 branched alcohol, C15 branched alcohol, benzyl alcohol, phenoxyethanol, diethylene glycol monobutyl ether, 1-phenoxy-2-propanol, 2-phenyl-1-ethanol, 2-phenyl-1 -Propanol, 4-phenyl-1-butanol, 2-cyclohexanol, 1-hexanol, 1-octanol, 1-undecanol, 1,2-hexanediol, 1,6-hexanediol, 2-phenoxyethanol, 1,2- Decanedidiol, dipropylene glycol, benzyl glycol and the like are preferable, 1,2-octanediol, C14 branched alcohol, C15 branched alcohol, benzyl alcohol, phenoxyethanol, diethylene glycol mono Chirueteru more preferably, 1,2-octanediol is particularly preferred.

  The water-soluble functional fluid according to the present invention is preferably formed by blending the above-mentioned alcohol at a concentration by mass of 2500 ppm or more. The lower limit of the amount of alcohol added is preferably 500 ppm or more, more preferably 1000 ppm or more, and further preferably 2500 ppm or more, and the upper limit is preferably 1.0% by mass or less, more preferably 0.5% by mass or less. Thus, in the present invention, the antiseptic / sterilization performance of the water-soluble functional fluid can be synergistically improved by adding a small amount of alcohol in addition to the amine salt of the triazole. From the viewpoint of cost, a small amount of alcohol may be added.

<How to use water-soluble functional fluid>
The above-described water-soluble functional fluid according to the present invention can be used after being diluted. More specifically, when diluting with water, the concentration of the above-described triazole amine salt is adjusted to 3000 ppm or more. Preferably it is 5000 ppm or more, More preferably, it is 7000 ppm or more. Thereby, sufficient antiseptic and bactericidal properties can be expressed in the water-soluble functional fluid during actual use.

  In addition, when the water-soluble functional fluid according to the present invention is diluted with water, the pH can be used in a substantially neutral range (pH 7 to 10, preferably pH 7.4 to 9) as described above. . Thereby, it is possible to suppress the bad influence to a workpiece, equipment, or an operator.

  As described above, according to the present invention, sufficient antiseptic and sterilizing performance can be expressed in a water-soluble functional fluid by containing the amine salt of the predetermined triazole described above at a high concentration. The antiseptic and bactericidal properties of the triazoles with amine salts are effects that cannot be seen when the triazoles are added alone. Compared to known amine-based antiseptic / bactericides, etc., it can be used in the neutral range, has reduced adverse effects on workpieces such as aluminum, has less skin irritation, etc. It is also characterized by the fact that the concentration in functional functional fluid can be increased, and there is almost no foaming at the time of use, and it can stably exhibit antiseptic and sterilizing performance over a long period of time for water-soluble functional fluid it can.

  Hereinafter, based on an Example, this invention is explained in full detail. In the following examples, “ppm” means mass ratio.

<Sample synthesis>
Using triazoles and various amines shown in Table 1 below, amine salts of triazoles were prepared and used as evaluation samples according to Examples 1 to 16.

  In Table 1, TEA is triethanolamine, DEA is diethanolamine, MEA is monoethanolamine, TIPA is triisopropanolamine, DIPA is diisopropanolamine, MIPA is monoisopropanolamine, DCHA is dicyclohexylamine, MO is morpholine, AMP is 2-amino-2-methyl-1-propanol, DMA is dimethylamine, DPA is di-n-propylamine, CHA-2 is N, N-bis (2-hydroxyethyl) -N-cyclohexylamine, DBZA Represents dibenzylamine.

Furthermore, benzotriazole was used alone as Comparative Example 1, and tolyltriazole was used alone as Comparative Example 2.
Further, as Comparative Examples 3 to 15, various amines were used alone. When the amine is used alone, the pH becomes too high, so hydrochloric acid was added to adjust the pH to 9 ± 0.3.

<Evaluation of antiseptic and bactericidal properties>
About each sample, the antiseptic action and the bactericidal action in the water-soluble functional fluid were confirmed. Specifically, after adding each sample at a predetermined concentration to a septic solution of a water-soluble cutting fluid (Pseudomonas SP, septic solution containing enteric bacteria, viable cell count 7 × 10 ⁶ cells / ml, pH 8.4), After stirring and allowing to stand at 30 ° C. for one day and night, one platinum loop was applied to a normal agar medium plate and cultured for 48 hours to confirm the presence or absence of viable bacteria. The results are shown in Table 2 below. In Table 2, “++” indicates the number of viable bacteria, “+” indicates that there are viable bacteria that are reduced from the blank, and “−” indicates that there are no viable bacteria (complete sterilization). .

As is clear from the results shown in Table 2, first, the triazoles themselves (comparative examples 1 and 2) that are not converted to amine salts do not exhibit antiseptic / bactericidal properties. However, for triazoles themselves, antiseptic and bactericidal effects were observed when the system was a forced dispersion emulsion. That is, when triazoles are used alone, for example, it was found that a bactericidal effect appears if a dilute solution is prepared with alcohol, added to a predetermined concentration, and successfully dispersed in the emulsion system.
Moreover, about the amine itself (Comparative Examples 3-15), in the functional fluid of a neutral range, except for one part, antiseptic / bactericidal property is not show | played. However, antiseptic and bactericidal effects were observed for oil-soluble amines.
On the other hand, when triazoles are used as amine salts (Examples 1 to 16), remarkable antiseptic / bactericidal properties are observed even in a neutral functional fluid at a predetermined concentration or higher. In addition, as compared with the case where triazoles are used alone, a sufficient effect is exhibited even in a system containing only a surfactant. In addition, the said density | concentration is higher than content of the triazole as a conventional rust preventive agent. When the tendency in Table 2 is seen, it turns out that the salt with an oil-soluble amine has a higher antiseptic and bactericidal effect than the salt with a water-soluble amine.

<Evaluation of rust prevention and discoloration for metal materials>
For the samples according to Examples 1 to 16 and Comparative Examples 1 to 15, 1% dilutions were prepared, and the polished test pieces were fully immersed therein and allowed to stand at room temperature (30 ± 5 ° C.) for 24 hours. . Thereafter, the test piece was taken out, the change in the appearance of the sample solution and the test piece was observed, and the change in the weight of the test piece was measured.
Furthermore, as reference examples, when oleylsarcosine DEA equivalent salt (OZ-DEA salt) is used (Reference Example 1), when a nonionic higher alcohol EO 7 mol adduct is used (Reference Example 2), triazine type The same evaluation was performed when a preservative (manufactured by Clariant) was used (Reference Example 3), and when water (tap water) was used as it was without adding a preservative or the like (Reference Example 4).

  When using an aluminum piece (A5052, 30 x 50 x 3 mm) as a test piece, when using a steel piece (SPCC, 30 x 50 x 1 mm), or using a brass piece (C2801, 30 x 50 x 2 mm) The results are shown in Table 3 below.

  As is apparent from the results shown in Table 3, it can be seen that the amine salts of triazoles hardly cause discoloration of various metals and have rust prevention properties. In particular, a remarkable effect is recognized on aluminum pieces and steel pieces, and it is clear that amine salts of triazoles can impart rust preventive properties not only to non-ferrous metals but also to ferrous metals. That is, for example, it is assumed that the steel material is used in equipment using the functional fluid, such as piping for circulating the functional fluid, nozzles for spraying the functional fluid, etc. In such a case, the present invention It can be seen that by adding an amine salt of a triazole as described above, the rust prevention of the equipment can be realized together with the preservation of the functional fluid.

<Evaluation of foaming>
About the sample which concerns on an Example, after preparing 50 ml of 1% dilution liquid and shaking 20 times in a cylinder, the volume change of the dilution liquid was measured and the foaming of the dilution liquid was evaluated.

  Table 4 below shows the volume (ml) of each diluted solution immediately after shaking, 30 seconds later, 1 minute later, 2 minutes later, 3 minutes later, 4 minutes later and 5 minutes later.

  As is clear from the results shown in Table 4, in the example using the diluted solution containing the amine salt of triazole, foaming slightly occurred immediately after shaking 20 times, but the foaming disappeared over time. It was done. Thus, it can be seen that the water-soluble functional fluid according to the present invention has almost no inconvenient foaming at the time of use, can be handled almost the same as tap water, and is excellent in handleability.

<Evaluation of pH dependence>
(Sample adjustment)
An emulsion type reference formulation was made and diluted to 5% with water. A solution containing the sample according to Reference Example A using Examples 2, 15 and Reference Examples 1 to 3 and a commercially available benzoisothiazoline preservative (BIT preservative) in 100 g of the diluted solution was used as a pure component. As an evaluation solution. The obtained evaluation solution corresponds to a sample added with 5% per stock solution.

  The pH of the obtained evaluation liquid was 7.9, and evaluation was performed using two levels of sample liquid in which diethanolamine was added to adjust the pH to 8.8 and 9.6, respectively.

(Bactericidal test)
Each evaluation solution and a septic solution containing 5 × 10 ⁶ viable bacteria / ml were mixed at a fixed ratio, and stirred and allowed to stand for 24 hours. Thereafter, one platinum loop of the mixed solution was collected and cultured on a normal agar plate medium, the presence or absence of viable bacteria was confirmed, and the minimum bacterial concentration (ppm) of the mixed system was determined. The evaluation results are shown in Table 5.

  In addition to the evaluation of the above examples and reference examples, as a “comparative sample oil agent”, a commercially available amine-based biostatic oil agent (primary amine 6%, manufactured by Yushiro Chemical Industry Co., Ltd.) and a rot solution are mixed. Evaluation was also made for the case. Usually, amine-based biostatic oils are used in the high pH range, but in this experiment, in order to confirm the effect of pH (preservative performance in the neutral range), acetic acid was added to adjust the pH. Adjusted to sex range (8.0 or 9.2). The evaluation results are shown in Table 5.

  As is clear from the results shown in Table 5, when the amine salt of triazole is used, sufficient antiseptic and bactericidal properties are exhibited even at low pH, whereas the conventional primary class In the case of amine-based anti-septic oils (comparative sample oils), since the oils exhibit antiseptic and sterilization performance at high pH, at a low pH of about 8.0 to 9.2, It was confirmed that it does not function sufficiently as a preservative.

  Thus, according to the water-soluble functional fluid according to the present invention containing an amine salt of triazoles, it can be seen that sufficient antiseptic properties are exhibited at a neutral pH. Thereby, it becomes possible to suppress discoloration of the aluminum material due to high pH and skin irritation of the worker.

  In the above embodiment, the case where the cutting fluid is used as the water-soluble functional fluid has been described. However, the water-soluble functional fluid according to the present invention is not limited to a water-soluble working fluid such as a cutting fluid. Hereinafter, the evaluation results of antiseptic / disinfectant properties regarding the antiseptic / disinfectant properties of the “water-soluble detergent” will be shown.

<Evaluation of antiseptic and bactericidal properties in water-soluble detergents>
For each sample, the antiseptic action and bactericidal action of the water-soluble detergent were confirmed. Specifically, after adding each sample to a septic solution (pH 8.4, viable cell count 8 × 10 ⁶ / ml) of a water-soluble detergent (manufactured by Yushiro Chemical Industry Co., Ltd., product name W80), After stirring and allowing to stand at 30 ° C. for one day and night, one platinum loop was applied to a normal agar medium plate and cultured for 48 hours to confirm the presence or absence of viable bacteria. When the amine is used alone, the pH becomes too high, so hydrochloric acid was added to adjust the pH to 9 ± 0.3. The results are shown in Table 6 below. In Table 6, “++” indicates the number of viable bacteria, “+” indicates that there are viable bacteria that are reduced from the blank, and “−” indicates that there are no viable bacteria (complete sterilization). .

As is apparent from the results shown in Table 6, when triazoles are used alone, the solubility in the system is low, so that the antiseptic and bactericidal properties are not exhibited. Moreover, although the result became favorable about oil-soluble amine DCHA and DBZA, this is considered because solubility and the dispersibility improved by adding with hydrochloride.
On the other hand, it can be seen that the amine salt of triazoles (Examples) exhibits strong antiseptic and bactericidal properties even in the cleaning liquid, and shows a sufficient effect at a concentration of about 3000 ppm. That is, it can be seen that not only the cutting fluid but also the cleaning fluid exhibits a very significant antiseptic and sterilizing effect only when the triazole is in the form of an amine salt as in the present invention. From the above, it has been found that amine salts of triazoles can impart antiseptic and bactericidal properties to any water-soluble functional fluid without being affected by other components contained in the system.

  As described above, the present invention can be used as a water-soluble functional fluid as a water-soluble cutting oil, water-soluble grinding oil, water-soluble press oil, water-soluble forging oil, water-soluble rolling oil, water-soluble cutting oil, water-soluble polishing oil or water-soluble It can be seen that the present invention can be applied not only to water-soluble working fluids such as water-soluble hydraulic fluids but also to water-soluble cleaning agents.

<Expression of synergistic effect by addition of alcohol>
In the water-soluble functional fluid, antiseptic action and bactericidal action were confirmed when the amine salt of the above triazole and alcohol were used in combination. Specifically, a septic solution (Pseudomonas SP, a septic solution containing enterobacteria), a viable count of 7 × 10 ⁶ cells / ml, pH 8 of a water-soluble cutting fluid (manufactured by Yushiro Chemical Industry Co., Ltd., product name Yushiroken EC50T3) 4), benzotriazole (BT), triethanolamine (TEA) and various alcohols were added to a predetermined concentration, stirred, and allowed to stand at 30 ° C. for one day and night. One platinum loop was applied to the sample and cultured for 48 hours to check for the presence of viable bacteria.

  The evaluation results are shown in Table 7 below. In Table 7, “++” indicates the case of many viable bacteria, “+” indicates that there are viable bacteria that are reduced from the blank, but “−” indicates that there are no viable bacteria (complete sterilization). .

  In Table 7, Reference Example 4 is an example in which “Yushiroken MIC5” (pH 9.4) manufactured by Yushiro Chemical Industry Co., Ltd. was added, and Reference Example 5 added “Yushiroken EC50T3” (pH 10.4) manufactured by Yushiro Chemical Industry Co., Ltd. It is an example.

From the results shown in Table 7, the following can be understood.
(1) From the comparison between Reference Example 3, Example 17, and Example 18, when the benzotriazole amine salt and alcohol were added in small amounts (Example 18), a larger amount of benzotriazole amine salt was added. In this case (Example 17), or when a large amount of alcohol is added (Reference Example 3), the antiseptic / disinfectability is dramatically improved. That is, it can be seen that the amine salt of benzotriazole and alcohol act synergistically and contribute to antiseptic and bactericidal properties.
(2) From Examples 18 to 26, it can be seen that at least an alcohol having 6 to 15 carbon atoms can act synergistically with the amine salt of benzotriazole to dramatically improve antiseptic and bactericidal properties. .
(3) Example 22 is an example in which the pH was intentionally lowered by reducing the amine concentration. From Example 22, it can be seen that sufficient antiseptic and bactericidal properties can be obtained by the combined use of an amine salt of benzotriazole and an alcohol even in a neutral range (pH 7.4), in which it is usually difficult to develop anti-corruption. . It can also be seen that the effect is comparable to existing products (Reference Examples 4 and 5) that have a high pH and a large amount of amine.

  In the above experiment, an example in which an amine salt of benzotriazole and an alcohol were used in combination was shown, but the same effect was obtained when an amine salt of tolyltriazole was used instead of the amine salt of benzotriazole.

  Although the present invention has been described with reference to the most practical and preferred embodiments at the present time, the invention is not limited to the embodiments disclosed herein. However, the present invention can be modified as appropriate without departing from the spirit or concept of the invention which can be read from the claims and the entire specification, and the water-soluble functional fluid and the method of using the same are also included in the technical scope of the present invention. Must be understood as being.

  The present invention includes a water-soluble cutting oil, a water-soluble grinding oil, a water-soluble cleaning agent, a water-soluble press oil, a water-soluble forging oil, a water-soluble rolling oil, a water-soluble cutting oil, a water-soluble polishing oil, a water-soluble hydraulic oil, etc. It can be widely used as a technique for imparting antiseptic and bactericidal properties to water-soluble functional fluids.

Claims (7)

A water-soluble functional fluid comprising an amine salt of benzotriazole and / or an amine salt of tolyltriazole at a mass% concentration of 3000 ppm or more. Used as water-soluble cutting oil, water-soluble grinding oil, water-soluble detergent, water-soluble press oil, water-soluble forging oil, water-soluble rolling oil, water-soluble cutting oil, water-soluble abrasive oil or water-soluble hydraulic oil Item 4. The water-soluble functional fluid according to Item 1. Furthermore, the water-soluble functional fluid of Claim 1 or 2 formed by mix | blending C6-C15 alcohol. The water-soluble property according to claim 3, wherein the alcohol is at least one selected from 1,2-octanediol, branched alcohol having 14 carbon atoms, branched alcohol having 15 carbon atoms, benzyl alcohol, phenoxyethanol, and diethylene glycol monobutyl ether. Functional fluid. A method for using a water-soluble functional fluid, wherein, when a water-soluble functional fluid is used, the concentration is adjusted so that the mass% concentration of the amine salt of benzotriazole and / or the amine salt of tolyltriazole is 3000 ppm or more. Furthermore, the usage method of Claim 5 adjusted so that C6-C15 alcohol may coexist. The use method according to claim 6, wherein at least one selected from 1,2-octanediol, branched alcohol having 14 carbon atoms, branched alcohol having 15 carbon atoms, benzyl alcohol, phenoxyethanol, and diethylene glycol monobutyl ether is used as the alcohol. .