Emulsified cutting fluid composition

Abstract

This invention proposes an emulsified cutting fluid composition comprising a stabilizer / dispersant, an extreme pressure agent, a bactericide, a rust inhibitor, a surfactant, a pH adjuster, a coupling agent, an antifreeze, a base oil, and water. The stabilizer / dispersant has the structure shown in formula (I), where the definitions of each group are provided in the specification. The emulsified cutting fluid composition of this invention exhibits excellent rust prevention, lubrication, and cooling functions, requires a small dosage, has a long service life, good stability, and good compatibility with the bactericide. It can be widely used in the machining of aluminum alloys, cast iron, and steel alloys.

Description

Technical Field

[0001] This invention relates to an emulsified cutting fluid composition, and more particularly to an emulsified cutting fluid composition with excellent rust prevention, lubrication and cooling functions. Background Technology

[0002] With the continuous development and progress of industrial technology and the emergence of new materials and processes, the requirements for metal cutting fluids in metal processing are becoming increasingly stringent. Therefore, developing high-performance related products is crucial for precision and ultra-precision metal processing, ensuring processing quality, and improving processing efficiency.

[0003] Currently, cutting fluids used in metal processing mainly include emulsified cutting fluids, synthetic cutting fluids, and semi-synthetic cutting fluids. Emulsified cutting fluids have disadvantages such as poor cooling and easy corrosion; synthetic cutting fluids have disadvantages such as insufficient lubrication and poor rust prevention; semi-synthetic cutting fluids usually have poor stability and are technically demanding and difficult to develop.

[0004] The stability of cutting fluid is a crucial technical indicator that significantly impacts metalworking efficiency. CN109370704A discloses a metal cutting fluid in which modified graphene is added as a stabilizing dispersant, resulting in improved stability.

[0005] Existing metal cutting fluids often become contaminated with various bacteria during actual use, leading to mold and foul odors and rendering them unusable. Adding bactericides often reduces the stability of the metal cutting fluid. Developing cutting fluids with higher stability and bactericidal properties remains a focus of research for those skilled in the art. Summary of the Invention

[0006] In order to solve the technical problems existing in the prior art, the inventors of this application have made efforts to propose an emulsified cutting fluid composition.

[0007] The emulsified cutting fluid composition of the present invention comprises a stabilizer / dispersant, an extreme pressure agent, a bactericide, a rust inhibitor, a surfactant, a pH adjuster, a coupling agent, an antifreeze, a base oil, and water, wherein the structure of the stabilizer / dispersant is shown in formula (I):

[0008]

[0009] In formula (I), each R0 group may be the same as or different from each other, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 Aryl; each G group may be the same as or different from the others, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 The aryl group, the group represented by formula (II), and at least one G group is selected from the group represented by formula (II);

[0010]

[0011] In formula (II), the R group is selected from polyisobutylene groups with a number average molecular weight of 1000 to 5000, and the symbol * represents the binding end with formula (I).

[0012] According to the present invention, optionally, in formula (I), each RO group is independently selected from H, C1-C4 alkyl, phenyl; each G group is independently selected from H, C1-C4 alkyl, phenyl, and the group shown in formula (II); in formula (II), the R group is selected from polyisobutylene groups with a number average molecular weight of 1000-2500.

[0013] According to the present invention, optionally, in formula (I), one, two or three G groups are each independently selected from the groups shown in formula (II).

[0014] According to the present invention, the stabilizer dispersant may include one or more of the following structural compounds:

[0015]

[0016] PIB stands for polyisobutylene group.

[0017] According to the present invention, the method for preparing the stabilizer dispersant includes the following steps:

[0018] (1) React the compound shown in formula (α) with indigo anhydride;

[0019]

[0020] In formula (α), each R0 group may be the same as or different from each other, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 Aryl; each G' group may be the same as or different from the others, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 Aryl group, and at least one G' group is selected from H;

[0021] (2) React the reaction product of step (1) with polyisobutylene maleic anhydride and collect the product.

[0022] According to the present invention, optionally, in formula (α), each RO group is independently selected from H, C1-C4 alkyl, and phenyl; each G' group is independently selected from H, C1-C4 alkyl, and phenyl.

[0023] According to the present invention, optionally, in formula (α), one, two or three G' groups are selected from H.

[0024] According to the present invention, the compound represented by formula (α) can be tris(4-aminophenyl)amine.

[0025] According to the present invention, the structure of the indocinic anhydride is as follows:

[0026]

[0027] According to the present invention, the structure of the polyisobutylene maleic anhydride is as follows:

[0028]

[0029] The PIB group is selected from polyisobutylene groups with a number average molecular weight of 1000 to 5000, and preferably from polyisobutylene groups with a number average molecular weight of 1000 to 2500.

[0030] According to the present invention, optionally, in step (1), the molar ratio of the compound represented by formula (α) to indomethacin anhydride is 1:(0.5-3.5), preferably 1:(3-3.2); the reaction conditions include: a reaction temperature of 80-100℃ and a reaction time of 8-12h; preferably, a reaction temperature of 85-95℃ and a reaction time of 9-10h.

[0031] According to the present invention, optionally, in step (2), the molar ratio of the reaction product of step (1) to the polyisobutylene maleic anhydride is 1:(0.5-3.5), preferably 1:(3-3.2); the reaction conditions include: a reaction temperature of 140-160℃ and a reaction time of 4-8h; preferably, a reaction temperature of 145-155℃ and a reaction time of 5-7h.

[0032] According to the present invention, steps (1) and (2) can be performed in the presence of a diluent and / or solvent, or without the use of a diluent and / or solvent.

[0033] According to the present invention, the diluent may be selected from one or more of API Group I, II, III, IV and V base oils. Common products or grades include 100SN, 150SN, 200SN, 350SN, 500SN, 650SN, 150BS, HVI-100, HVI-150, HVI-200, HVI-350, HVI-400, HVI-500, HVI-150BS, PAO4, PAO6, PAO8, PAO10, alkylbenzene, alkylnaphthalene, etc.

[0034] According to the present invention, the solvent may be C 6-20 Aromatic hydrocarbons (such as benzene, toluene, xylene, and cumene), C 6-10Alkanes (such as n-hexane, cyclohexane, and petroleum ether), solvent gasoline, etc. These solvents may be used individually, or in combination of two or more. The solvents may be removed after the reaction is complete using methods known to those skilled in the art, such as distillation under normal or reduced pressure.

[0035] According to a particular embodiment of the present invention, the diluent and / or solvent may be added at any stage of the reaction step in the amounts conventional in the art, without particular limitation.

[0036] According to the present invention, the reactions in steps (1) and (2) can be carried out under the protection of an inert gas atmosphere. Examples of inert gases include nitrogen and argon, and there is no particular limitation.

[0037] According to the present invention, the aforementioned preparation method can produce a single stable dispersant, a mixture of multiple stable dispersants, or a mixture of one or more stable dispersants with the aforementioned diluent (if used) as the reaction product. These reaction products are all contemplated by the present invention, and their different forms do not affect the achievement of the effects of the present invention. Therefore, in the context of this specification, these reaction products are collectively referred to as stable dispersants without distinction. In view of this, according to the present invention, there is no absolute necessity for further purification of the reaction product or for further separation of a stable dispersant with a specific structure from the reaction product. Of course, such purification or separation is preferred for further enhancing the intended effects of the present invention, but is not essential to the present invention. Nevertheless, methods for purification or separation, such as column chromatography or preparative chromatography, can be cited as examples.

[0038] According to the present invention, the polar end of the stabilizing dispersant contains multiple benzene rings and amide functional groups centered on an N atom, exhibiting excellent dispersing properties. The preparation method of the stabilizing dispersant of the present invention is simple and has high synthesis efficiency.

[0039] According to the present invention, the extreme pressure agent may be a chlorine-based extreme pressure agent and / or a molybdenum-based extreme pressure agent, such as chlorinated paraffin or molybdenum disulfide, preferably chlorinated paraffin.

[0040] According to the present invention, the bactericide may be selected from one or more of triazine, morpholine and isoxazolinone bactericides, for example, triazine or morpholine may be selected, with triazine being preferred.

[0041] According to the present invention, the rust inhibitor may be selected from one or more of the following: organic ternary polycarboxylic acid, benzotriazole, sodium benzotriazole, methylbenzotriazole, sodium methylbenzotriazole, butylbenzotriazole, sodium butylbenzotriazole, mercaptobenzotriazole, sodium mercaptobenzotriazole, aminotriazole, hydroxyquinoline, indole, imidazoline, aminosulfonic acid and fatty acid amide, preferably a mixture of benzotriazole and organic ternary polycarboxylic acid, and the mass ratio between the two is preferably 1:0.5 to 10.

[0042] According to the present invention, the surfactant may be selected from sorbitol oleate, C5-C64 oleate, etc. 30 Alkoxy fatty alcohols, C5-C 30 One or more of long-chain olefinic acids and phosphate esters, preferably one or more of docosenoic acid, sorbitan oleate and sorbitan octadecenoic acid.

[0043] According to the present invention, the pH adjuster can be selected from C2 to C4. 12 Alkylamines, C5-C 12 One or more of organic acids and boric acids, such as monoethanolamine, diethanolamine, triethanolamine, C5-C6, etc., can be selected. 12 One or more of organic acids and boric acids, preferably a mixture of monoethanolamine and triethanolamine, in a mass ratio of 1:0.5 to 5.

[0044] According to the present invention, the coupling agent can be an ether-based coupling agent, such as ethylene propylene glycol monomethyl ether, ethylene propylene glycol monoethyl ether, or ethylene propylene glycol monopropyl ether, with ethylene propylene glycol monomethyl ether being preferred.

[0045] According to the present invention, the antifreeze can be selected from C. 10 ~C 20 Straight-chain or branched alkyl alcohols, preferably C14-2 ... 15 ~C 20 Branched alkyl alcohols, such as isooctadecyl alcohol, can be selected.

[0046] According to the present invention, the base oil is selected from one or more of naphthenic oil, paraffinic oil, aromatic oil and tall oil, preferably a mixture of naphthenic oil and tall oil, and the mass ratio between the two is preferably 1:0.1 to 1.

[0047] According to the present invention, the stabilizing dispersant accounts for 0.1% to 5% (preferably 0.2% to 2%) of the total mass of the emulsified cutting fluid composition; the extreme pressure agent accounts for 5% to 25% (preferably 10% to 15%) of the total mass of the emulsified cutting fluid composition; the bactericide accounts for 1% to 5% (preferably 2% to 4%) of the total mass of the emulsified cutting fluid composition; the rust inhibitor accounts for 2% to 10% (preferably 5% to 8%) of the total mass of the emulsified cutting fluid composition; and the surfactant accounts for 5% of the total mass of the emulsified cutting fluid composition. ~15% (preferably 8%~12%); the pH adjuster accounts for 5%~20% (preferably 8%~15%) of the total mass of the emulsified cutting fluid composition; the coupling agent accounts for 0.5%~2% (preferably 1%~1.5%) of the total mass of the emulsified cutting fluid composition; the antifreeze accounts for 0.5%~2% (preferably 0.8%~1.5%) of the total mass of the emulsified cutting fluid composition; the base oil accounts for 20%~70% (preferably 30%~50%) of the total mass of the emulsified cutting fluid composition; the balance is water.

[0048] The method for manufacturing the emulsified cutting fluid composition of the present invention includes the step of mixing the stabilizer, dispersant, extreme pressure agent, bactericide, rust inhibitor, surfactant, pH adjuster, coupling agent, antifreeze, base oil and water.

[0049] The emulsified cutting fluid composition of the present invention has excellent rust prevention, lubrication and cooling functions, requires a small amount to be added, has a long service life, good stability, and good compatibility with bactericides. It can be widely used in the processing of aluminum alloys, cast iron and steel alloys. Attached Figure Description

[0050] Figure 1 This is the infrared spectrum of the aromatic amine dispersant prepared in Example 1 of this application.

[0051] Figure 2 This is the infrared spectrum of the intermediate product prepared in Example 1 of this application. Detailed Implementation

[0052] The present invention will be further illustrated by the following embodiments, but these are not intended to limit the scope of the invention.

[0053] The main raw materials used are as follows:

[0054] Polyisobutylene succinimide (PIB number-average molecular weight 1000), Yangzi Petrochemical;

[0055] Polyisobutylene maleic anhydride (PIB number-average molecular weight 1000), Yangzi Petrochemical;

[0056] Polyisobutylene maleimide (PIB number-average molecular weight 1000), Yangzi Petrochemical;

[0057] 100SN, 150SN, Maoming Petrochemical;

[0058] Indocyanine anhydride, Ark Pharmaceuticals;

[0059] Tris(4-aminophenyl)amine, Shanghai Adamas Reagent Co., Ltd.;

[0060] The organic ternary polycarboxylic acid uses CP-50, a commercially available product from Shanghai Miling Chemical Co., Ltd. The active ingredient in CP-50 is 2,4,6-tris(aminohexanoic acid)-1,3,5-triazine, with an active ingredient content of 50% (mass fraction).

[0061] Benzotriazole, Shanghai Miling Chemical Co., Ltd.;

[0062] Dodecenoic acid, Nanjing Lanbai Chemical Co., Ltd.;

[0063] Monoethanolamine, triethanolamine, Hubei Xianlin Chemical Co., Ltd.;

[0064] Isooctadecyl alcohol, Shanghai Miling Chemical Co., Ltd.;

[0065] Triazine, Shanghai Miling Chemical Co., Ltd.;

[0066] Polyether coupling agent, ethylene propylene glycol monomethyl ether, Shanghai Milin Chemical Co., Ltd., brand name OH-17;

[0067] T151 uses products manufactured by Yangzi Petrochemical;

[0068] 40# naphthenic oil, Simin Oil & Chemical Co., Ltd.;

[0069] Tall Oil, Simin Oil & Chemical Co., Ltd.

[0070] Example 1

[0071] 4.89 g of indocyanine anhydride and 2.9 g of tris(4-aminophenyl)amine were added to a 500 ml reactor, followed by 160 ml of toluene. Nitrogen gas was introduced, and the mixture was refluxed under cooling water. The reaction was carried out at 90 °C for 10 hours. After the reaction, the toluene was evaporated. Then, 33 g of polyisobutylene maleic anhydride (with a number-average molecular weight of 1000) dissolved in 100 ml of 150SN was added. Nitrogen gas was introduced, and the mixture was refluxed under cooling water. The reaction was carried out at 150 °C for 6 hours. After the reaction, the solvent was evaporated to obtain the aromatic amine dispersant of this invention. Infrared spectroscopy was performed on the obtained aromatic amine dispersant and the intermediate product. The Fourier transform infrared spectrometer used was an AVATAR 360 from Nicolet, USA, with a scanning range of 4000-400 cm⁻¹. -1 . Figure 1 This is the infrared spectrum of the aromatic amine dispersant. Figure 2 Infrared spectrum of the intermediate product.

[0072] The example reaction formula for Example 1 is shown below.

[0073]

[0074] Depend on Figure 1 and Figure 2 It can be seen that the absorption peak of the primary amine attached to the benzene ring in the intermediate product is at 3349 cm⁻¹. -1 Near the point of reaction with polyisobutylene maleic anhydride, the absorption peak disappears; the absorption peak of the amide in the intermediate product is at 1600 cm⁻¹. -1 Near the point of reaction with polyisobutylene maleic anhydride, the absorption peak weakens; the absorption peak of the newly formed imide in the product is at 1700 cm⁻¹. -1 nearby. Figure 1 and Figure 2 This demonstrates that the target product was successfully produced.

[0075] Example 2

[0076] Add 4.89g of indomethacin anhydride and 2.9g of tris(4-aminophenyl)amine to a 500ml reactor, add 160ml of toluene, purge with nitrogen, turn on the cooling water and reflux, and react at 80℃ for 12 hours. After the reaction is complete, evaporate the toluene. Then add 33g of polyisobutylene maleic anhydride (wherein the number average molecular weight of polyisobutylene is 1000) dissolved in 100ml of 150SN, purge with nitrogen, turn on the cooling water, and react at 160℃ for 5 hours. After the reaction is complete, evaporate the solvent to obtain the aromatic amine dispersant of the present invention.

[0077] Example 3

[0078] Add 4.89g of indomethacin anhydride and 2.9g of tris(4-aminophenyl)amine to a 500ml reactor, add 160ml of toluene, purge with nitrogen, turn on the reflux condenser, and react at 100℃ for 8 hours. After the reaction is complete, evaporate the toluene. Then add 33g of polyisobutylene maleic anhydride (wherein the number average molecular weight of polyisobutylene is 1000) dissolved in 100ml of 150SN, purge with nitrogen, turn on the reflux condenser, and react at 140℃ for 8 hours. After the reaction is complete, evaporate the solvent to obtain the aromatic amine dispersant of the present invention.

[0079] Comparative Example 1

[0080] The method of Example 1 was used, except that: indigo anhydride was not added, and tris(4-aminophenyl)amine and polyisobutylene maleic anhydride were reacted at a molar ratio of 1:3. After the reaction was completed, the soot-free dispersant DF1 of this comparative example was obtained.

[0081] Comparative Example 2

[0082] The method of Example 1 was used, except that tris(4-aminophenyl)amine was replaced with an equimolar amount of diaminodiphenylmethane to obtain the soot-free dispersant DF2 of this comparative example.

[0083] Comparative Example 3

[0084] The method of Example 1 was used, except that polyisobutylene maleimide was used instead of polyisobutylene maleic anhydride to synthesize a polyisobutylene maleimide-type ashless dispersant, wherein the number average molecular weight of polyisobutylene in the polyisobutylene maleimide was 1000. The soot-free dispersant DF3 of this comparative example was obtained.

[0085] Comparative Example 4

[0086] Commercially available polyisobutylene succinimide T151 was used as a comparative ashless dispersant.

[0087] Examples 4-6 and Comparative Examples 5-8 of the emulsified cutting fluid compositions

[0088] The formulations of the emulsified cutting fluid compositions in Examples 4-6 and Comparative Examples 5-8 are shown in Table 1. Each component was added to a mixing container in the specified proportions, heated and stirred at 60°C for 2 hours, and then allowed to stand for 1 hour. Before use, the mixture can be diluted with deionized water or tap water to a concentration of 5-20%, with the pH value controlled between 7.5 and 9.5.

[0089] Stability tests, defoaming tests, and rust prevention tests were conducted on the emulsified cutting fluid compositions of Examples 4-6 and Comparative Examples 5-8, respectively, and the test methods are described below.

[0090] Stability test

[0091] The stability test method is as follows: 50ml of emulsified cutting fluid concentrate is placed in a 100ml stoppered graduated cylinder and placed in a 70℃ constant temperature drying oven for 5h. After that, it is taken out and cooled to room temperature (15~35℃) for 3h. Then it is placed in a low temperature environment of -12℃ for 24h. After that, it is taken out and allowed to stand back to room temperature for 10h. Then observe whether there is oil-water separation.

[0092] Defoaming test

[0093] Pour the test solution into a 100mL stoppered graduated cylinder, maintaining the liquid level at 70mL. Stopper the cylinder and shake it up and down for 1 minute, at a frequency of approximately 100 to 120 times per minute. Then let it stand at room temperature for 10 minutes and observe the volume of residual foam on the liquid surface. A volume less than or equal to 2mL is considered acceptable.

[0094] Rust resistance test

[0095] Using a dropper, draw up the test solution and drop five drops in a quincunx pattern onto the polished surface of the cast iron test piece. Each drop should be approximately 4-5 mm in diameter. Then, place the test piece on the desiccator partition, cover the desiccator, and place it in a constant temperature chamber at 35℃±2℃. After 24 hours of continuous testing, remove the test piece and observe it.

[0096] The evaluation criteria are as follows: five drops of rust-free water is grade A, four drops of rust-free water is grade B, three drops of rust-free water is grade C, and four or five drops of rust-free water is grade D.

[0097] Table 1 Formulation composition of emulsified cutting fluid composition

[0098]

[0099] The performance test results of the above emulsified cutting fluid composition are shown in Table 2.

[0100] Table 2 Performance Evaluation Results

[0101]

Claims

1. An emulsified cutting fluid composition comprising a stabilizer / dispersant, an extreme pressure agent, a bactericide, a rust inhibitor, a surfactant, a pH adjuster, a coupling agent, an antifreeze, a base oil, and water, wherein the stabilizer / dispersant has the structure shown in formula (I): In formula (I), each R0 group may be the same as or different from each other, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 Aryl; each G group may be the same as or different from the others, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 The aryl group, the group represented by formula (II), and at least one G group is selected from the group represented by formula (II); In formula (II), the R group is selected from polyisobutylene groups with a number average molecular weight of 1000 to 5000, and the symbol * represents the binding end with formula (I).

2. The emulsified cutting fluid composition according to claim 1, characterized in that, In formula (I), each R0 group is independently selected from H, C1-C4 alkyl, phenyl; each G group is independently selected from H, C1-C4 alkyl, phenyl, and the group shown in formula (II); in formula (II), the R group is selected from polyisobutylene groups with a number average molecular weight of 1000-2500.

3. The emulsified cutting fluid composition according to claim 1, characterized in that, The stabilizing dispersant is one or more of the following structural compounds: PIB stands for polyisobutylene group.

4. The emulsified cutting fluid composition according to claim 1, characterized in that, The method for preparing the stabilizer includes the following steps: (1) React the compound shown in formula (α) with indigo anhydride; In formula (α), each R0 group may be the same as or different from each other, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 Aryl; each G' group may be the same as or different from the others, and each is independently selected from H, C1-C4 alkyl, C6 ... 10 Aryl group, and at least one G' group is selected from H; (2) React the reaction product of step (1) with polyisobutylene maleic anhydride and collect the product.

5. The emulsified cutting fluid composition according to claim 4, characterized in that, In formula (α), each R0 group is independently selected from H, C1-C4 alkyl, and phenyl; each G' group is independently selected from H, C1-C4 alkyl, and phenyl.

6. The emulsified cutting fluid composition according to claim 4, characterized in that, The structure of the polyisobutylene maleic anhydride is as follows: The PIB group is selected from polyisobutylene groups with a number average molecular weight of 1000 to 5000.

7. The emulsified cutting fluid composition according to claim 4, characterized in that, In step (1), the molar ratio of the compound shown in formula (α) to indigo anhydride is 1:(0.5~3.5); the reaction temperature is 80-100℃, and the reaction time is 8-12h.

8. The emulsified cutting fluid composition according to claim 4, characterized in that, In step (2), the molar ratio of the reaction product of step (1) to the polyisobutylene maleic anhydride is 1:(0.5-3.5); the reaction temperature is 140-160℃ and the reaction time is 4-8h.

9. The emulsified cutting fluid composition according to any one of claims 1 to 8, characterized in that, The extreme pressure agent is selected from chlorine-based extreme pressure agents and / or molybdenum-based extreme pressure agents; the bactericide is selected from one or more of triazine, morpholine, and isoxazolinone bactericides; the rust inhibitor is selected from one or more of organic ternary polycarboxylic acids, benzotriazole, benzotriazole sodium, methylbenzotriazole, methylbenzotriazole sodium, butylbenzotriazole, butylbenzotriazole sodium, mercaptobenzotriazole, mercaptobenzotriazole sodium, aminotriazole, hydroxyquinoline, indole, imidazoline, aminosulfonic acid, and fatty acid amides; the surfactant is selected from sorbitan oleate, C5-C 30 Alkoxy fatty alcohols, C5-C 30 One or more of long-chain olefinic acids and phosphate esters; the pH adjuster is selected from C2-C4. 12 Alkylamines, C5-C 12 One or more of organic acids and boric acids; the coupling agent is selected from ether-based coupling agents; the antifreeze is selected from C 10 ~C 20 The base oil is a straight-chain or branched alkyl alcohol; the base oil is selected from one or more of naphthenic oils, paraffinic oils, aromatic oils and tall oils.

10. The emulsified cutting fluid composition according to any one of claims 1 to 8, characterized in that, The stabilizer / dispersant comprises 0.1% to 5% of the total mass of the emulsified cutting fluid composition; the extreme pressure agent comprises 5% to 25% of the total mass of the emulsified cutting fluid composition; the bactericide comprises 1% to 5% of the total mass of the emulsified cutting fluid composition; the rust inhibitor comprises 2% to 10% of the total mass of the emulsified cutting fluid composition; the surfactant comprises 5% to 15% of the total mass of the emulsified cutting fluid composition; the pH adjuster comprises 5% to 20% of the total mass of the emulsified cutting fluid composition; the coupling agent comprises 0.5% to 2% of the total mass of the emulsified cutting fluid composition; the antifreeze comprises 0.5% to 2% of the total mass of the emulsified cutting fluid composition; the base oil comprises 20% to 70% of the total mass of the emulsified cutting fluid composition; and the balance is water.

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