JPS602358B2 - cutting fluid - Google Patents

Description

[Detailed description of the invention] The present invention relates to components for cutting fluids.

In the present invention, the concept includes both a cutting agent and an abrasive agent. Cutting fluids are broadly classified into water-insoluble cutting fluids and water-shedding cutting fluids, and the components of the present invention are particularly useful for water-shedding cutting fluids.

The basic condition that a cutting fluid must have is lubricity (extreme pressure property).
, have cold retention properties and rust prevention properties.

Conventionally, head nitrates and the like have been used as water-dropping cutting fluids that meet these conditions, but they have the disadvantage of inferior extreme pressure properties compared to water-insoluble cutting fluids. Therefore, it has extreme pressure properties that are comparable to water-insoluble cutting fluids, and can be used as a grinding fluid or a cutting fluid in the narrow sense.In addition, it is a versatile water-soluble fluid with excellent rust prevention and cold retention properties. There were hopes for the development of cutting fluids. The present invention provides a water-soluble cutting fluid having extremely excellent properties in terms of extreme pressure properties and rust prevention properties, that is, it contains an alkali salt of a carboxylic acid having 12 to 24 carbon atoms and having at least one dihalocyclobroban residue in its skeleton. Regarding cutting fluids.

The alkali carboxylic acid salt having a dihalocyclopropane residue of the present invention can be used in any of the solution-type, soluble-type and emulsion-type cutting fluids according to JIS K2241-1970, and when used as a solution-type, it can be used as a base agent. In emulsion form, it may be used as a rust preventive and gutter pressure additive.

It is most suitable to be used as a soluble water soluble cutting fluid. The dihalocyclopropane residue of the present invention is formed by reacting haloform with the double bond of an unsaturated carboxylic acid.

Examples of unsaturated carboxylic acids include lauroleic acid,
Examples include, but are not limited to, carbosic acids such as myristoleic acid, palmitoleic acid, oleic acid, erucic acid, linoleic acid, linolenic acid, arachidonic acid, etc., and other substitutions such as branched chains and aromatic groups. It may have a group. Preferred are straight-headed unsaturated carboxylic acids having 12 to 24 carbon atoms, most preferably 16 to 24 carbon atoms. Those with less than 12 carbon atoms are unsuitable due to poor extreme pressure properties, and when the carbon number is above 2, the water solubility decreases. The halogens in haloform include fluorine, chlorine,
Mention may be made of bromine and iodine, with chlorine being the most preferred. Examples of the alkali salts of the present invention include alkanolamine salts, alkali metal salts, ammonium salts, and various other salts of amines, but triethanolamine, monoethanolamine, jetanolamine, etc. Most preferred are alkanolamine salts.

When the cutting fluid of the present invention is used as a solution-type water-soluble cutting fluid, a 1 to 5% by weight aqueous solution is preferred.

When used in soluble form, a 1 to 10% by weight aqueous solution is preferred. Other additives include other extreme pressure additives,
Preservatives and cleaning additives may also be added. When used in an emulsion type, an aqueous solution containing 1 to 10% by weight of the cutting fluid of the present invention is preferred. Other additives for emulsion-type cutting fluids, such as other additives, emulsifiers, emulsion stabilizers, rust preventives, and preservatives, may be used as appropriate. The alkali carboxylic acid salt having a dihalocyclopropane residue of the present invention has extreme pressure properties comparable to those of water-insoluble extreme pressure agents, and has excellent rust prevention and cold retention properties, so it can be used as the main component of cutting fluids. can also be used.

This will be explained below by giving examples. Example 1 Using a 0.5% by weight aqueous solution of a tritanolamine salt of a fatty acid having a dichlorocyclopropane group with a carbon skeleton of various unsaturated carboxyl acids, anti-bell properties, surface tension, pressure resistance, and coefficient of friction were measured. The conditions for each measurement are as follows.

○1 Rust prevention mirror chip method: Chips from dry cutting of castings are immersed in the aqueous solution, the solution is drained, and placed in a petri dish. After 7 hours, the state of rust is observed.

Evaluation is done on a 10-point scale, with a sleep state of no bells being given a 10.
shall be. 'Raw-rolled steel plate method: A polished cold-rolled steel plate is immersed in the aqueous solution, air-dried, and left indoors for 7 hours, after which the rusting state is observed.

The evaluation will be the same as the money-cutting powder method. [21 Surface tension: Surface tension at 25°C was measured using a Dunoy surface tensiometer.
'31 Friction coefficient: 2 by Kubida type 0 pendulum oil tester
Measured at DE0.

'41 Pressure resistance: 20mm by Pawnda four-ball lubricating oil tester. p. Measured in m.

The test results are shown in Table-1.

Table 1 G) is obtained by reacting potassium undecanoate with chloroform.

6) is oleic acid) is linoleic acid 0) is ersic acid As is clear from Table 1, carboxylic acid alkali salts having dichlorocyclopropane residues have significantly higher pressure resistance than conventional nitrites. It is understood that it also has excellent rust prevention properties.

Example 2 An abrasive with the following formulation was diluted with water by 5q/1, and using this diluted a steel plate (S45C raw material) with a surface grinder, the time required to produce a shavings was measured, and nitrite was used. Compare with case.

Prescription weight parts r-(2.2-di, lolocyclopropyl)berargonic acid 10 triethanolamine 20 water
70 Nitrite-based abrasive formulation Sodium nitrite 10 Triethanolamine
20 water
70 (diluted to 5M with water when in use) Grinding conditions Machine: Surface grinder Grinding wheel circumferential speed: 1800 m/min Work material: S-4 string grinding wheel: WA-46JV Depth of cut: 2/10 Qiu Misaki Invention Grinding When using the abrasive agent, no clogging occurred for 2 minutes, but when using a conventional nitrite-based abrasive agent, clogging occurred in 14 minutes.

Example 3 The effect of adding a dichlorocyclopropane group-containing carboxylic acid triethanolamine salt as an extreme pressure additive to a soluble cutting fluid is compared with that of no additive.

Cutting fluid formulation tl' Parts by weight Oleic acid 5 Mu(2,2-dichlorocyclopropyl)berargonic acid
10 triethanolamine
20 Sodium petroleum sulfonate
10 amine preservative
3 water
52 Cutting fluid formulation '21 - Comparative example Parts by weight Oleic acid 5 Triethanolamine 20 Sodium petroleum sulfonate 10 Amine preservative
3 water
62 Cutting conditions Machine: Band saw Work material: Connecting rod S4 (in stock) Cutting speed: 200/min Cutting fluid dilution ratio: 2 Blended with undecanoic acid alkanolamine salt having a dichlorocyclopropane residue If a cutting fluid with the same temperature is used, the number of pieces to be cut reaches 2,000, but if a cutting fluid without this is used, the number of cuts will be 1,000 or more, and the cutting will become impossible.

Claims (1)

[Claims] 1 At least one dihalocyclopropane residue in the skeleton
A cutting fluid containing an alkali salt of a carboxylic acid having 12 to 24 carbon atoms. 2. The cutting fluid according to item 1, wherein the halogen is chlorine. 3. The cutting fluid according to item 1, wherein the alkali salt is an alkanolamine salt. 4. The cutting fluid according to any one of paragraphs 1 to 3, wherein the stone cutting fluid is a soluble type water-soluble cutting fluid.