JPH0366798A - Water soluble metal processing lubricant - Google Patents

Abstract

PURPOSE:To obtain the title lubricant containing a specific compound and having excellent lubricating property, lust preventing property and antimicrobial property and usable in processing treatment for cutting and grinding processing, quenching, plastic deformation processing, etc. CONSTITUTION:The aimed lubricant containing a compound expressed by formula I (X is formula II to formula IV; M is alkali metal, ammonium or amine residue; R is 3-20C alkyl, alkylene or aryl). Furthermore, the compound expressed by formula I is obtained by reacting a compound expressed by formula V obtained by reacting cinnamic anhydride, etc., with octylamine, etc., in a solvent such as carbon tetrachloride under ordinary pressure at 50-80 deg.C for 2-8hr with an alkali metal hydroxide, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a water-soluble metal working fluid used in metal processing such as cutting, grinding, quenching, and plastic working.

Conventional technology Water-soluble metalworking fluids are required to have corrosion resistance as well as lubricity and rust prevention. Conventionally, amine salts (e.g., dienolamine salts and triethanolamine salts) or metal salts (e.g., caustic soda, Water-soluble metal processing oils containing active ingredients (caustic potash, sodium carbonate, etc.) are used, but although these types of oils have excellent lubricity and rust prevention properties, they have poor corrosion resistance, so they cannot be used in processed products. This poses problems in terms of quality assurance and management of oil usage. For example, processing oils are degraded by microorganisms during long-term use, which not only generates bad odors and produces gummy substances, but also deteriorates the lubricity and rust prevention properties of the oils.

In order to solve these problems, various preservatives (for example, hexahydro-1,3,5-tris(2)
-hydroxyethyl)-9-triazine, 1,2-benzisothiazoline, etc.), but the effect of the addition is short-term and not sustainable, and these types of preservatives must be added in relatively large amounts. To prevent the occurrence of chemical odor,
This causes other problems such as increased toxicity, rough hands, and decreased processing performance.

Problems to be Solved by the Invention The present invention has been made in order to provide a water-soluble metal working fluid that is excellent not only in its integrity and anti-corrosion properties, but also in its anti-corrosion properties (antibacterial properties).

In order to solve the problem, this invention has the following features: (wherein, -20 alkyl, alkylene, or aryl groups).

In formula (1), X represents the above-mentioned divalent residue, and M represents an alkali metal atom, such as sodium, potassium, and lithium, an ammonium group, or an amine, such as methylamine, ethylamine, propylamine, ethylenediamine, monoethanol. Indicates a residue such as amine, jetanolamine or triethanolamine.

In formula (1), R is an alkyl group having 3 to 20 carbon atoms, preferably 6 to 18 carbon atoms, such as hexyl group, octyl group, decyl group, dodecyl group, and octadecyl group, alkylene group such as undecylene group, It represents an oleyl group or an aryl group, such as a phenyl group and a naphthyl group, which may have one or two methyl groups.

The method for producing the compound represented by formula (I) is not particularly limited, but for example, succinic anhydride, maleic anhydride or phthalic anhydride in an equimolar amount of RN H* (R has the same meaning as above), e.g. Octylamine, decylamine, dodecylamine, oleylamine or hexylamine etc. in a solvent such as carbon tetrachloride or benzene at about 50 to 80°C under normal pressure.
The formula (■
): (wherein X and R have the same meanings as above) is reacted with an alkali metal hydroxide such as sodium or potassium, ammonium hydroxide, or the above-mentioned amine such as ethylenediamine or triethanolamine. It is prepared by letting.

Two or more of the compounds represented by the above general formula (r) may be used in combination, if desired.

The water-soluble metalworking fluid according to the present invention usually contains 5% by weight or more of compound (1), preferably 10% by weight or more, and -
The oil agent is diluted to 115 to 1/100 in the membrane before use.

The water-soluble metalworking fluid according to the invention may optionally contain conventional additives, such as extreme pressure additives (e.g., chlorinated paraffins, sulfurized paraffins, phosphate esters, etc.), oiliness improvers (e.g., methyl oleate, etc.). esters, oleic acid, etc.), emulsifiers (e.g., polyoxyethylene nonylphenol ether, sorbitan monooleate, etc.), rust inhibitors (e.g., petroleum sulfonic acid sodium salts, alkylsulfonamide carboxylates, etc.), antifoaming agents (e.g. , silicone oil, etc.), preservatives (e.g., hexahydro-1,
3,5-tris(2-hydroxyethyl)-S-triazine, 1,2-benzisothiazoline, etc.) may be blended as appropriate.

Furthermore, when the above compound (1) is sparingly soluble in water, a surfactant such as polyoxynonylphenol ether, sorbitan monooleate, etc. may be appropriately blended to make it solubilized.

Hereinafter, the present invention will be explained by examples.

Okami Kokujo Nijoi An equimolar mixture of maleic anhydride, phthalic anhydride, or succinic anhydride, and octylamine, etc., was added to carbon tetrachloride at 70%
Compound 1-15 shown in Table 1 was prepared by reacting the reaction product obtained by stirring at °C for 7 hours with triethanolamine and the like.

Water-soluble metalworking fluids 1-15 were prepared by dissolving these compounds 1-15 in water at a concentration of 0.5% by weight.

The rust prevention, surface tension, friction coefficient, pressure resistance, and antibacterial properties of these metalworking fluids 1-15 were measured as follows.
The results are shown in Table-2.

(a) Rust prevention test ■ Casting chip method: Casting dry cutting chips are immersed in the above sample solution, then pulled up, drained of the liquid, and transferred to a petri dish. 72 hours later, the state of the chips is chained. was evaluated.

In Table-2, "○" means 72 o'clock. No rust was observed after "×" indicates 24 hour time. Indicates when rust is observed inside the vinegar.

(2) Temporarily rolled steel plate method: A polished, partially rolled steel plate was immersed in the sample solution, taken out, air-dried, and left indoors for 72 hours. The rusting state of the steel plate was evaluated in the same manner as in (2).

(b) Surface tension: 25°C using a Dunuy surface tension meter.
It was measured with

(c) Friction coefficient: 2 using Soda type pendulum oil tester
Measured at 5°C.

(d) Pressure resistance: 20 using a Soda four-ball lubricant tester
Or, p, - Measured by sequential loading method.

(e) Antibacterial test: 20 m (1 liter) of sterilized ordinary agar medium is placed in a petri dish (diameter 90
+u) and solidified. Pre-activated spoilage bacteria (bacteria contained in putrefaction emulsion 3 liquid collected at a metal processing factory (number of viable bacteria: 10'/1112 or more)) was inoculated onto the entire surface of the solidified agar into a liquid medium, and the bacteria were incubated at 30°C. Then, 10 μQ of the above aqueous solution was dropped onto the center of the agar surface, and after culturing at 30°C for 24 hours, the presence or absence of bacterial growth in the area where the sample was dropped was examined.

In Table 2, "+" indicates that bacterial growth was observed, and "-" indicates that bacterial proliferation was not observed.

Comparative Examples 1 to 3 Triethanolamine salt of sebacic acid, p-t-, which has been conventionally used as an active ingredient in water-soluble metal working fluids.
A 0.5% by weight aqueous solution of the triethanolamine salt of butylbenzoic acid and the triethanolamine salt of maleic acid were used as water-soluble metalworking oil l° to 3°, respectively, and the antiseptic properties, surface tension, friction coefficient, Examples of pressure resistance and antibacterial properties! Measurements were made in the same manner as in the cases of 15 to 15, and the results are shown in Table 2.

Example 16 The concentration of compound 1-15 was 0.05% by weight, 11% by weight, and 0.1% by weight.
The antibacterial properties were examined in the same manner as in Examples 1 to 15, except that the concentration was changed to 1 Mri%, and the results are shown in Table 3.

Comparative Example 4 Triethanolamine salt of sebacic acid (hereinafter referred to as compound l
), triethanolamine salt of pt-butylbenzoic acid (hereinafter referred to as compound 2°) or triethanolamine salt of maleic acid (hereinafter referred to as compound 3°)
The concentration of 0.05% by weight, 0.1% by weight or 1% by weight
The antibacterial properties were investigated in the same manner as in Examples 1 to I5, except that the results are shown in Table 3.

Table-1 (*)-CHt(CHt)tcI(=CI(Cut
CHs Hide-3 Table-2 Effects of the Invention The water-soluble metal working fluid according to this invention not only has excellent lubricity and rust prevention properties, but also has excellent antibacterial properties without causing the problems of conventional products. Since it is effective, it can be widely used in the field of processing such as metal cutting, grinding, quenching, and plastic working.

Claims (1)

[Claims] 1. General formula (I): ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, X is the following divalent residue: ▲There are mathematical formulas, chemical formulas, tables, etc.) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ or ▲There are mathematical formulas, chemical formulas, tables, etc.▼ where M represents an alkali metal atom, ammonium group or amine residue, and R represents an alkyl group having 3 to 20 carbon atoms. , an alkylene group or an aryl group) A water-soluble metal working fluid containing a compound represented by: