JPH0198696A - Water-soluble cutting oil - Google Patents

Abstract

PURPOSE:To improve the working environment and to increase the liquid service life through a reduction in the biodegradability, by incorporating a particular amine derivative in a water-soluble cutting oil. CONSTITUTION:A water-soluble cutting oil comprises an amine derivative of the formula, wherein R is an 8-18C alkyl or alkenyl, R' is a propylene group; m is 0 or 1-4; x, y, and z are each 0 or 1-10; and x+y+z is 1-10. Examples of the amine as a starting material of the amine compd. used include 2- ethylhexylamine and n-octylamine when R is an alkyl group; and oleyltetraethylenepentamine when R is an alkenyl group. The concn. of the amine derivative in the cutting oil is pref. 0.001-1wt.%. When the concn. is 0.001% or less, no effect is attained. On the other hand, a concn. exceeding 1wt.% is uneconomical because no improvement in the effect can be attained. This amine derivative has a combination of antiseptic property and rust preventive performance with a defoaming effect.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a water-soluble cutting fluid (hereinafter referred to as "mizukiri") used in cutting and grinding. More specifically, the present invention relates to an improved drainer with less microbial deterioration.

[Prior Art] The components of draining generally include oiliness improvers such as mineral oil, fats and oils and their esters, C1, S, and P type extreme pressure additives,
It is formulated using anionic and nonionic emulsifiers, rust preventive agents, antioxidants, antiseptic and anti-pep agents, etc.

Further, the concentration used is usually diluted with water to about 1-10%. The requirements for water cutting are, of course, cutting performance, but also auxiliary properties (rust prevention of cut objects and machine tools), antiseptic properties (prevention of bad odors due to rot), safety for the human body, and low foaming. properties, paint peeling resistance, etc. are required. In particular, various troubles due to rot have occurred, and there is a strong need for an oil agent that can solve these problems. Problems caused by spoilage include deterioration of the working environment due to bad odors and shortening of the lifespan of oils due to accelerated aging. In contrast, in the past, preservatives temporarily suppressed the growth of microorganisms, which was not sustainable, and the oil solution had to be managed by frequently adding preservatives to the liquid used.

[Problems to be Solved by the Invention] The present invention particularly provides a drainer that prevents bad odors caused by the proliferation of microorganisms and is difficult to generate liquid, thereby improving the working environment and increasing the lifespan of the liquid. be.

[Means for Solving the Problems] As a result of intensive research, the present inventors discovered that by adding a special amine compound, the microbial deterioration resistance could be significantly improved without impairing the performance of draining, and the present invention has been achieved. has been reached.

The present invention uses the following formula (1 ) is characterized by containing an amine derivative represented by

(R'0)zH (where R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, Ro is a propylene group, and 1m is 0
or an integer from 1 to 4, X, y, and 2 are each 0 or an integer from 1 to 10, and x+y+z is an integer from 1 to 1.
It is 0. ) The amine derivative that can be used in the present invention is the following formula (2)
It can be obtained by adding propylene oxide to the amine compound shown by the conventional method.

R(NHCHlCH,)mNH2・・・・・(
2) (However, R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, and m is an integer of 0 or 1 to 4.) The amines that can be used as raw materials for the amine compound that can be used in the present invention are as follows. It's like this.

・R is an alkyl group 2-ethylhexylamine n-octylamine laurylamine n-octadecylamine laurylethylenediamine ・R is an alkenyl group oleyltetraethylenepentamine In the present invention, the concentration of the amine derivative in the cutting fluid is:
The content is desirably 0.001-1% (weight %, same hereinafter), preferably 0.01-0.5%. If it is less than 0.001%, the effect of the present invention cannot be obtained, and if it is more than 1%, the effect cannot be improved and it is uneconomical.

Further, conventional ethylene oxide adducts of alkyl or alkenyl amines have a preservative effect, but have a problem with foamability. The amine derivative of the present invention has an antifoaming effect in addition to antiseptic and antirust properties.

The mineral oil, fat, oil, extreme pressure additive, surfactant, metal anticorrosive agent, preservative, etc. used in the present invention can be arbitrarily selected from those conventionally used for draining.

[Example] An example will be shown below, but as a method for producing a drainer, mixing and dissolving each component by a conventional method is sufficient. Furthermore, the present invention is not limited to these examples.

EXAMPLE 1 The following draining composition was obtained using 1.0 mol of propylene oxide adduct of n-octylamine as the amine derivative of the present invention.

Mineral oil 63 parts by weight Chlorinated paraffin 6 Anionic surfactant 23 Nonionic surfactant 5 Preservative 1 Pro-adduct of n-octylamine 2 1.0 mole adduct of pyrene oxide This draining composition was diluted 50 times with sterile water. 300 ml of the diluted solution (emulsion) was taken into a sterilized 500 ml beaker, and the rotten emulsion (viable bacteria count 3X
6 ml (2% based on drained emulsion) of IO" pieces/ml) were added, and 9 ml of lubricating oil (Bactra No. 2: Mobil Oil) was added, and the temperature was maintained at 30 °C. After that, 6 ml of inoculum was added every 48 hours. was added and left to stand for 15 days. During this period, it was stirred for 1 hour every 24 hours, and the pH was adjusted every 48 hours.
1. Changes in appearance and odor were observed, and a portion of the sample was collected to measure the number of viable bacteria. The number of viable bacteria was measured by the plate count method using an ordinary agar medium. Table these results.
2 together with Examples 2 to 6 below.

Tests were conducted in the same manner as in Example 1 for draining compositions containing various amine derivatives. Table 1 shows the types and draining compositions of these amine derivatives together with Example 1.

Comparative Examples A and B Comparative Examples A and B, which do not use the amine derivative of the present invention, are also listed in Tables 1 and 2.

[Effects of the Invention] As shown in Table 2, the drainer using the amine derivative of the present invention has better microbial deterioration resistance than the comparative example, and it is clear that it can withstand long-term use.

Patent applicant: Toho Chemical Industry Co., Ltd.
Formal placement (spontaneous) February 9, 1988 Kunio Ogawa, Commissioner of the Patent Office1, Indication of the case, Patent Application No. 254662 of 19882, Name of the invention, Water-soluble cutting fluid3, Person making the amendment, and Relationship between Patent applicant address: 1-14-94 Kakigara-cho, Nihonbashi, Chuo-ku, Tokyo In the Scope column, "2. Scope of Claims" is corrected to "2. Scope of Claims." (No change to the content of the claims) (2) Table 1 on page 7 in the Detailed Description of the Invention section will be corrected as shown in the attached sheet.

Pu 　　　　Koreko

Claims (1)

[Scope of Claims] A water-soluble cutting fluid characterized by containing an amine derivative represented by the following general formula. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (However, R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, R' is a propylene group, m is 0
or an integer from 1 to 4, x, y, and z are each 0 or an integer from 1 to 10, and x+y+z is an integer from 1 to 1.
It is 0. )