JPH04352702A - Antiseptic treating solution - Google Patents

Abstract

PURPOSE:To suppress propagation of various germs in cyclic use for a long period without blending large amounts of respective ingredients due to their synergistic action by adding silver and either or both of thymol and propanol to a water-soluble polishing treating liquid. CONSTITUTION:An antiseptic treating liquid is obtained by blending silver such as silver nitrate and either or both of thymol and propanol with a water-soluble treating liquid, especially a water-soluble polishing and cutting liquid (e.g. Emulcut (R) 2 manufactured by Kyodo Oils and Fats Co., Ltd.). The ingredients are preferably blended in the following amounts based on l kl water-soluble polishing and cutting liquid. about 0.2-6.5g silver salt such as the silver nitrate, about 10-150g thymol and about 0.2-3.0l propanol. The aforementioned antiseptic treating liquid is capable of effectively suppressing propagation of various germs in cyclic use with hardly any deterioration in polishing and cutting performance. Thereby, good working environment without emitting malodor even in use for a long period can be maintained.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an antiseptic treatment liquid,
In particular, the present invention relates to a preservative treatment liquid such as a preservative grinding cutting liquid used for grinding a workpiece to be ground.

0002

BACKGROUND OF THE INVENTION Processing fluids, such as grinding fluids, are used to process objects made of metal or the like, and are generally circulated. However, when the grinding fluid is circulated for a relatively short period of time, bacteria grow and emit a strange odor.
Significantly worsens the working cycle. For this reason, even though it has sufficient abrasive cutting performance as an abrasive cutting fluid, it has to be replaced with a new one, which has been a factor in increasing processing costs.

[0003] For this reason, attempts have been made to control the growth of germs by adjusting the pH of the grinding fluid or by blowing air into it. However, it is not possible to obtain sufficient effects as expected.

On the other hand, it has been considered to add silver to the grinding fluid to suppress the growth of germs. however,
In order to suppress the growth of bacteria in the grinding fluid, it is necessary to add a large amount of silver, for example, 6.5 g or more per 1 kl of the grinding fluid, which makes the grinding fluid extremely expensive.

[0005] It is also conceivable to add thymol or propanol, which are well known conventionally as preservatives, to the grinding fluid. However, even with these preservatives, large amounts are required to suppress the growth of bacteria in the grinding fluid.
For example, in the case of thymol, it is 1 kg per 1 kl of grinding fluid.
Above, in the case of propanol, 1 kl of grinding fluid
It is necessary to add 00 liters or more of each. the result,
There is a problem that not only the grinding fluid becomes expensive, but also the grinding performance itself deteriorates due to the addition of a large amount of preservative.

The present invention has been made in order to solve the above-mentioned conventional problems, and is a preservative that can effectively suppress the growth of germs during repeated use without substantially reducing the abrasive cutting performance. The present invention aims to provide a preservative treatment liquid such as a cutting liquid.

[0007]

Means for Solving the Problems The antiseptic treatment liquid according to the present invention is characterized in that silver and one or both of thymol and propanol are blended into a water-soluble treatment liquid.

[0008] Examples of the water-soluble liquid to be treated include water-soluble grinding liquids (water-soluble cutting fluids, water-soluble grinding fluids), bath liquids that require antiseptic action industrially, such as cooling water, and the like. Can be done.

[0009] The silver is usually blended in the form of a silver salt such as silver nitrate. The amount of silver to be added to the water-soluble treated material (hereinafter referred to as water-soluble grinding fluid) cannot be absolutely limited depending on the composition of the water-soluble grinding fluid, the required degree of antiseptic properties, etc. 0.2 to 6.5 per 1kl of cutting fluid
It is desirable to mix g. The reason for this is that if the amount of silver added is less than 0.2 g, it will be difficult to exhibit sufficient antiseptic performance due to interaction with the thymol etc.
On the other hand, if the blending amount of silver exceeds 6.5 g, the antiseptic performance cannot be improved by increasing the blending amount, leading to an increase in cost.

[0010] The amount of thymol and propanol to be blended in the water-soluble grinding cutting fluid cannot be absolutely limited for the same reason as mentioned above, but in the case of the thymol, it is 10 to 150 g per 1 kl of the water-soluble grinding cutting fluid. In the case of the Puropanol, it is desirable to mix 0.2 to 3.0 liters per 1 kiloliter of the water-soluble grinding cutting fluid. The reason for this is that if the amount of thymol is less than 10 g, it will be difficult to exhibit sufficient antiseptic performance due to interaction with the silver;
This is because if the amount exceeds 50 g, no improvement in antiseptic performance can be expected by increasing the blending amount, which not only leads to an increase in cost but also may reduce the abrasive cutting performance of the abrasive cutting fluid itself. Furthermore, if the amount of propanol blended is less than 0.2 liters, it will be difficult to exhibit sufficient antiseptic performance due to interaction with the silver, while if the amount of propanol blended exceeds 3.0 liters, the amount of the propanol blended will be This is because the antiseptic performance cannot be expected to be improved by increasing the amount, and not only will the cost increase, but there is a risk that the abrasive cutting performance of the abrasive cutting fluid itself will be lowered.

[0011]

[Action] According to the antiseptic treatment liquid, especially the antiseptic grinding cutting liquid, according to the present invention, by blending silver and one or both of thymol and propanol into the water-soluble grinding liquid, a synergistic effect between them can be achieved. This makes it possible to suppress the growth of germs over a long period of time during cyclical use without incorporating large amounts of each of the above-mentioned components. As a result, it is possible to prevent the occurrence of strange odors during long-term cyclical use, maintain a good working cycle, and reduce the frequency of replacement, which causes high costs. Further, due to the synergistic effect of the respective components, the amount of these components can be suppressed to the minimum necessary to maintain antiseptic performance, so that sufficient abrasive cutting performance can be maintained as a grinding cutting fluid.

0012

EXAMPLES Examples of the present invention will be described in detail below. Example 1

[0013] 3 g/k of silver nitrate was added to a water-soluble cutting fluid that easily causes rot (trade name: Emulcut #2, manufactured by Kyodo Yushi Co., Ltd.).
l (approximately 1.98/kl in terms of silver), thymol 60g/
A preservative grinding cutting fluid was prepared by blending the ingredients so as to give kl. Example 2

[0014] A preservative grinding cutting fluid was prepared by mixing silver nitrate at 3 g/kl (approximately 1.98/kl in terms of silver) and propanol at 1.2 l/kl in the same water-soluble cutting fluid as in Example 1. was prepared. Example 3

[0015] Silver nitrate was added to the same water-soluble cutting fluid as in Example 1 at a concentration of 3 g/kl (approximately 1.98/kl in terms of silver), thymol at 60 g/kl, and propanol at 1.2 l/kl. A preservative grinding cutting fluid was prepared.

[0016] The antiseptic cutting fluids of Examples 1 to 3, the water-soluble cutting fluid alone (Comparative Example 1), and the water-soluble cutting fluid containing 3 g/kl (approximately 1.9/kl in terms of silver) of silver nitrate. 5 each of antiseptic cutting fluid (Comparative Example 2) blended so that
Prepare 00ml and store them in a beaker for about 3 months for about 1 month.
We investigated the amount of general bacterial growth when left for a month. The results are shown in Table 1 below.
Table 1 Composition of grinding fluid After about 1 month
About 3 months later
Bacterial count (pcs/ml) Bacterial count (pcs/ml) Comparative example 1 Water-soluble cutting fluid only
110 290
00 Comparative Example 2 Water-soluble cutting fluid
100 19000
+Silver nitrate Example 1 Water-soluble cutting fluid
40 7600
+Silver nitrate +Thymol Example 2 Water-soluble cutting fluid
30 8200
+Silver nitrate +Propanol Example 3
Water-soluble cutting fluid 20
6800
+Silver nitrate +Thymol +Propanol

[0017]
As is clear from Table 1 above, the antiseptic cutting fluids of Examples 1 to 3 suppressed bacterial growth over a long period of time compared to Comparative Example 1, which contained only water-soluble cutting fluids, and Comparative Example 2, which contained silver nitrate. I know what I can do. In addition, the antiseptic cutting fluids of Examples 1 to 3 had grinding and cutting performance that was almost comparable to Comparative Example 1, which was composed only of water-soluble grinding cutting fluids.

[0018] Even when the grinding fluid of Similon M Kai 2 manufactured by Daido Kagaku Co., Ltd. is used instead of the cutting fluid described above, a preservative grinding fluid having the same excellent antiseptic performance as in Examples 1 to 3 can be obtained. I was able to do that. In addition, when the same components as in Example 1 were added to cooling water as a water-soluble treatment liquid, it was confirmed that it had good antiseptic performance during long-term circulation use.

[0019]

[Effects of the Invention] As detailed above, according to the present invention, it is possible to effectively suppress the growth of bacteria during repeated use without substantially reducing the abrasive cutting performance, and to eliminate unpleasant odors even after long-term use. It is possible to provide a preservative processing liquid such as a preservative grinding cutting liquid that can maintain a good working environment without the occurrence of.

Claims (2)

[Claims] 1. An antiseptic treatment liquid, characterized in that a water-soluble treatment liquid contains silver and one or both of thymol and propanol. 2. The antiseptic treatment liquid according to claim 1, wherein the water-soluble treatment liquid is a water-soluble grinding cutting liquid.