An emulsion stabilizing compound and its application in microemulsion cutting fluid

Abstract

The present invention provides an emulsion stabilizing compound and its application in microemulsion cutting fluid, aiming to solve the problems of flocculation and precipitation caused by the unsatisfactory stability of microemulsion cutting fluid itself and poor dispersibility of metal soap agglomerates in the prior art. The emulsion stabilizing compound comprises the following components in weight percentage: emulsion stabilizer 1: 26.32%~78.95%; emulsion stabilizer 2: 13.16%~52.63%; emulsion stabilizer 3: 2.6%~15.8%; wherein the emulsion stabilizer 1 is: rapeseed monoethanolamine polyoxyethylene ether, the emulsion stabilizer 2 is: glycolic acid ethoxylated oil ether, and the emulsion stabilizer 3 is: high molecular weight polymer surfactant.

Description

Technical Field

[0001] The present invention relates to the field of microemulsion cutting fluid, and more specifically, to an emulsion stabilizing compound, a preparation method and a microemulsion cutting fluid. Background Art

[0002] During the metal forming process, the introduction of cutting fluid can effectively reduce the friction heat in the processing area, extend the service life of the tool, improve the surface quality of the workpiece and prevent corrosion of the workpiece. Cutting fluids are divided into oil-based and water-based cutting fluids. Except for a very small number of low-speed heavy processing and difficult-to-process materials, most water-based cutting fluids are used. Water-based cutting fluids can be divided into fully synthetic, micro-emulsified and emulsified cutting fluids according to the oil content. Among them, fully synthetic cutting fluids do not contain oil, resulting in poor lubrication effects. The oil content of emulsified cutting fluids is about 50~80%, but due to the high oil content, it has poor working stability and a short service life. The oil content of micro-emulsified cutting fluids is 5~30%. It has the advantages of both fully synthetic cutting fluids and emulsified fluids, and makes up for the shortcomings of both. It has a very broad application prospect.

[0003] The working fluid of the microemulsified cutting fluid after being diluted with water is a water-in-oil emulsion. Usually, the stability of the diluent is directly related to the replacement cycle and service performance of the cutting fluid. For example, a stable diluent can usually form a uniform lubrication layer on the cutting surface of the workpiece, or form a monomolecular lubrication layer under high-speed cutting and extreme pressure environments, thereby exerting a boundary lubrication effect in the cutting area. The decrease in cutting fluid stability is mainly manifested in the occurrence of stratification, flocculation and precipitation, which is specifically due to the coalescence, fusion and demulsification of water-in-oil droplets in the diluent itself. The main reasons for the decrease in cutting fluid stability are the poor stability of the cutting fluid itself, which leads to a decrease in the electrostatic repulsion between the diluent droplets, polymerization, and an increase in particle size, which in turn leads to flocculation or precipitation. On the other hand, during the cutting process, as external metal ions (Ca in water) 2+ ,Mg 2+ Mg in Mg / Al alloy 2+ ) is introduced, the emulsifiers (fatty acids, sulfates) in the cutting fluid will interact with metal ions to form water-insoluble metal soap agglomerates, which will then cause agglomeration and stratification, shortening the service life of the cutting fluid. Summary of the invention

[0004] In view of this, the present invention provides an emulsion stabilizing compound, a preparation method and a microemulsion cutting fluid, aiming to solve the problems of flocculation and precipitation in the prior art due to the unsatisfactory stability of the microemulsion cutting fluid itself and poor dispersibility of metal soap agglomerates.

[0005] To this end, the present invention provides an emulsion stabilizing compound, a preparation method and a microemulsion cutting fluid, wherein the emulsion stabilizing compound comprises the following components in percentage by weight:

[0006] Emulsion stabilizer 1: 26.32%~78.95%;

[0007] Emulsion stabilizer 2: 13.16%~52.63%;

[0008] Emulsion stabilizer 3: 2.6%~15.8%;

[0009] The sum of the weight percentages of the above three components is 100%;

[0010] Wherein, the emulsion stabilizer 1 is: rapeseed monoethanolamine polyoxyethylene ether, the emulsion stabilizer 2 is: glycolic acid ethoxylated oil ether, and the emulsion stabilizer 3 is: a high molecular polymer surfactant.

[0011] Among them, rapeseed monoethanolamine polyoxyethylene ether: CAS No. 85536-23-8, specifically used is: Amidet TEC N produced by Kao Corporation of Japan, the specific structural formula is Fig.13 As shown. Ethoxylated glycolic acid ether: CAS No. 57635-48-0, the specific product used is: Akypo RO 90 VG produced by Kao of Japan, the specific structural formula is Fig.14 The polymeric surfactant is specifically: Hypermer A70 surfactant produced by Croda, UK, which is a polymeric surfactant.

[0012] Furthermore, the emulsion stabilizing compound of the above-mentioned microemulsion cutting fluid comprises the following components in percentage by weight:

[0013] Emulsion stabilizer 1: 52.63%

[0014] Emulsion stabilizer 2: 39.47%;

[0015] Emulsion stabilizer 3: 7.90%.

[0016] A method for preparing an emulsion stabilizing compound comprises the following steps:

[0017] (1) According to the above ratio, prepare the materials of the emulsion stabilizing compound;

[0018] (2) At 40°C, add emulsion stabilizers 1, 2, and 3 into the container in order and stir evenly.

[0019] A microemulsion cutting fluid comprises component A: an emulsion stabilizing compounding agent, and component B: a basic component of the cutting fluid, wherein component B comprises: triethanolamine, monoethanolamine, ethylenediaminetetraacetic acid, base oil, octylphosphonic acid, methylbenzotriazole, siloxane ketone, s-triazine, 1,2-benzisothiazolin-3-one, a polyether-modified silicon defoaming agent, and water.

[0020] A microemulsion cutting fluid comprises the following components in percentage by weight:

[0021] Component A: 1%~2%

[0022] Component B: 98%~99%;

[0023] The sum of the weight percentages of component A and component B is 100%.

[0024] The present invention has at least the following beneficial effects:

[0025] 1. The present invention quantitatively compounds several emulsion stabilizers containing ether bonds and different HLB values ​​in their molecular structures to form an emulsion stabilizer compound. The hydrophilic and hydrophobic parts in the structural composition of the emulsion stabilizer compound can interact with the water phase and oil phase particles at the same time, so that the emulsion particle size is reduced, and the distribution is concentrated and stable, thereby preventing the aggregation and sedimentation of droplets. In addition, the emulsion stabilizer compound has good dispersibility for metal soap agglomerates, which can avoid the agglomeration and stratification phenomenon of cutting fluid.

[0026] 2. The microemulsion cutting fluid of the present invention has excellent emulsion stability and dispersibility for metal soap agglomerates. Compared with conventional microemulsion cutting fluids, the microemulsion cutting fluid of the present invention is less likely to undergo agglomeration and stratification, and therefore has a more lasting lubrication effect and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a particle size distribution diagram of a 5% dilution of Example 1 of the present invention;

[0028] Figure 2 This is a particle size distribution diagram of a 5% dilution of Example 2 of the present invention;

[0029] Figure 3 This is a particle size distribution diagram of a 5% dilution of Example 3 of the present invention;

[0030] Figure 4 This is a particle size distribution diagram of a 5% dilution of Example 4 of the present invention;

[0031] Figure 5 This is a particle size distribution diagram of a 5% dilution of Example 5 of the present invention;

[0032] Figure 6 This is a particle size distribution diagram of a 5% dilution of Example 6 of the present invention;

[0033] Figure 7 This is the particle size distribution diagram of the 5% dilution of Example 7 of the present invention;

[0034] Figure 8 This is a particle size distribution diagram of a 5% dilution of Example 8 of the present invention;

[0035] Fig. 9 This is a particle size distribution diagram of a 5% dilution of Comparative Example 1 of the present invention;

[0036] Fig.10 This is the particle size distribution diagram of the 5% dilution of Comparative Example 2 of the present invention;

[0037] Fig.11 This is the particle size distribution diagram of the 5% dilution of Comparative Example 3 of the present invention;

[0038] Fig.12 This is a particle size distribution diagram of a 5% dilution of Example 9 of the present invention;

[0039] Fig.13 Schematic diagram of the molecular structure of the emulsion stabilizer 1 in the present invention;

[0040] Fig.14 It is a schematic diagram of the molecular structure of the emulsion stabilizer 2 in the present invention. DETAILED DESCRIPTION

[0041] The following examples are given to specifically describe the present invention. It is necessary to point out that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements or adjustments made to the present invention by ordinary technicians in this field based on the examples still fall within the scope of protection of the present invention.

[0042] The basic information of the additives in the emulsion stabilizing compound involved is as follows:

[0043] Emulsion stabilizer 1 is rapeseed monoethanolamine polyoxyethylene ether, which has the appearance of light yellow transparent liquid, pH (1% aqueous solution) of 9.2~10.2, and HLB value of 9.

[0044] Emulsion stabilizer 2 is glycolic acid ethoxylated oil ether, which has the appearance of light yellow transparent liquid, pH (10% aqueous solution) of 1.6~2.8, and HLB value of 10~12.

[0045] Emulsion stabilizer 3 is a high molecular weight polymer surfactant with a specific appearance of dark brown liquid, a density of 0.97 g / mL, an HLB value of 6, and a flash point of 268°C.

[0046] Through experiments, it was found that the best effect was achieved after the three additives were mixed. The mixing ratio is as follows:

[0047] Emulsion stabilizer 1 52.63%;

[0048] Emulsion stabilizer 2 39.47%;

[0049] Emulsion stabilizer 3 7.90%;

[0050] Other ratios within the following ranges are also possible:

[0051] Emulsion stabilizer 1: 26.32%~78.95%;

[0052] Emulsion stabilizer 2: 13.16%~52.63%;

[0053] Emulsion stabilizer 3: 2.6%~15.8%;

[0054] The sum of the weight percentages of the above three components is 100%;

[0055] The basic information of the additives in the microemulsion cutting fluid involved is as follows:

[0056] Base oil model: T282; Siloxane ketone model: AC-3S; Polyether modified silicone defoamer model: DF-603.

[0057] The microemulsion cutting fluid component B includes, by weight percentage: triethanolamine: 17.1%, monoethanolamine: 1.6%,

[0058] Ethylenediaminetetraacetic acid: 1.6%, base oil: 27%, octylphosphonic acid: 0.3%, methylbenzotriazole: 0.1%,

[0059] Siloxane ketone: 0.2%, s-triazine: 1.5%, 1,2-benzisothiazolin-3-one: 1.5%, polyether modified silicone defoamer: 0.3%, water: 48.8%.

[0060] The component B in all the embodiments and comparative examples is composed of the above weight percentage substances, except that the dosage of the component B added when preparing the cutting fluid is different. It can be understood that the above weight percentage substances are the original solution of the component B.

[0061] Embodiment 1:

[0062] 1 wt% of emulsion stabilizer 1 was added to 99 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0063] Embodiment 2:

[0064] 1 wt% of emulsion stabilizer 2 was added to 99 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added.2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0065] Embodiment 3:

[0066] 1 wt% of emulsion stabilizer 3 was added to 99 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0067] Embodiment 4:

[0068] 0.5 wt% of emulsion stabilizer 1 and 0.5 wt% of emulsion stabilizer 2 were added to 99 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0069] Embodiment 5:

[0070] 0.5 wt% of emulsion stabilizer 1 and 0.5 wt% of emulsion stabilizer 3 were added to 99 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0071] Embodiment 6:

[0072] 0.5 wt% of emulsion stabilizer 2 and 0.5 wt% of emulsion stabilizer 3 were added to 99 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added. 2+25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0073] Embodiment 7:

[0074] Take 2 parts by weight of emulsion stabilizer 1, 1.5 parts by weight of emulsion stabilizer 2 and 0.3 parts by weight of emulsion stabilizer 3, add them into a reaction container in sequence at 40°C and stir evenly to form an emulsion stabilizer compound package 1 (component A).

[0075] Add 1 wt% of component A to 99 wt% of component B, dilute the obtained microemulsion cutting fluid 20 times, and obtain the microemulsion cutting fluid dilution. At room temperature, take 25 mL of the microemulsion cutting fluid dilution and pour it into a stoppered measuring cylinder, then add Ca2PO4 with a concentration of 500 mg / L. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0076] Embodiment 8:

[0077] Add 2 wt% of component A to 98 wt% of component B, dilute the obtained microemulsion cutting fluid 20 times, and obtain the microemulsion cutting fluid dilution. At room temperature, take 25 mL of the microemulsion cutting fluid dilution and pour it into a stoppered measuring cylinder, then add Ca2PO4 with a concentration of 500 mg / L. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0078] Comparative Example 1:

[0079] Prepare 100 wt% of component B and dilute it 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, take 25 mL of the microemulsion cutting fluid dilution and pour it into a stoppered measuring cylinder, then add Ca2PO4 with a concentration of 500 mg / L. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0080] Comparative Example 2:

[0081] Take 0.8 parts by weight of emulsion stabilizer 1, 2.2 parts by weight of emulsion stabilizer 2 and 0.8 parts by weight of emulsion stabilizer 3, add them into a reaction container in sequence at 40° C. and stir evenly to form an emulsion stabilizer composite package 2.

[0082] Add 1.5 wt% of emulsion stabilizer compound package 2 to 98.5 wt% of component B, dilute the obtained microemulsion cutting fluid 20 times, and obtain the microemulsion cutting fluid dilution. At room temperature, take 25 mL of the microemulsion cutting fluid dilution and pour it into a stoppered measuring cylinder, then add Ca2PO4 with a concentration of 500 mg / L. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0083] Comparative Example 3

[0084] Take a commercially available microemulsion cutting fluid and dilute it 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, take 25 mL of the microemulsion cutting fluid dilution and pour it into a stoppered measuring cylinder. Then add 500 mg / L Ca 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0085] Embodiment 9:

[0086] 1.5 wt% of component A was added to 98.5 wt% of component B, and the obtained microemulsion cutting fluid was diluted 20 times to obtain the microemulsion cutting fluid dilution. At room temperature, 25 mL of the microemulsion cutting fluid dilution was poured into a stoppered measuring cylinder, and then Ca2PO4 with a concentration of 500 mg / L was added. 2+ 25 mL of solution was shaken up and down for 1 minute, allowed to stand for 2 hours, and the volume of suspended aggregates was observed; a laser particle size analyzer was used to test the particle size distribution of the fresh dilution and the dilution after standing at room temperature for 5 days.

[0087] Comparison results:

[0088] In order to investigate the dispersibility of the cutting fluids of each embodiment and comparative example to external metal ions, the dilution was mixed with 500 mg / L Ca 2+ The solution was mixed (simulating the introduction of external metal ions into the cutting fluid), and the volume of suspended aggregates on the liquid surface was observed. The results are shown in Table 1. The following conclusions can be drawn from this:

[0089] 1. When the addition amount is 1%, compared with single emulsion stabilizer 1, emulsion stabilizer 2, and emulsion stabilizer 3, the suspended agglomerate volume of emulsion stabilizer compound package 1 is the smallest, indicating that its dispersion of metal ions is optimal.

[0090] 2. When the addition amount is 1%, compared with the emulsion stabilizer 1, emulsion stabilizer 2, and emulsion stabilizer 3 in combination, the suspended agglomerate volume of emulsion stabilizer compound package 1 is the smallest, indicating that its dispersion of metal ions is optimal.

[0091] 3. The volume of suspended aggregates of the emulsion-stabilized compound package 1 with an addition amount of 2.0% is 0, and the dispersion of metal ions is optimal.

[0092] 4. Compared with no stabilizer, 1.5% emulsion stabilized compound package 2, commercially available microemulsified cutting fluid, and 1.5% emulsion stabilized compound package 1, the volume of suspended matter in the cutting fluid with stabilizer compound package was reduced, and the volume of suspended agglomerates in emulsion stabilized compound package 1 was much lower than that in emulsion stabilized compound package 2.

[0093] It can be shown that the cutting fluid with the emulsion stabilizing compound added has a better dispersing effect on the impurity metal ions, so that the cutting fluid will not agglomerate and stratify, and the cutting fluid has better emulsion stability and service life.

[0094] Table 1 Volume of suspended aggregates of Examples 1 to 9 and Comparative Examples 1 to 3

[0095]

[0096] In order to investigate the stability of the cutting fluids of each embodiment and comparative example, the particle size distribution test and average particle size test were performed on the fresh cutting fluid dilution and the dilution after standing for 120 hours. The results are as follows: Figures 1 to 11 As shown. The following conclusions can be drawn from this:

[0097] 1. When the addition amount is 1%, compared with single emulsion stabilizer 1, emulsion stabilizer 2, and emulsion stabilizer 3, the cutting fluid diluent with the addition of emulsion stabilizer compound package 1 has the lowest average particle size and uniform particle size distribution. After standing for 120 hours, the average particle size has no obvious change, and no large particle agglomerates appear, indicating that the cutting fluid itself has the best stability.

[0098] 2. When the addition amount is 1%, the particle size of the two-combination emulsion stabilizer 1, emulsion stabilizer 2, and emulsion stabilizer 3 is slightly reduced, but the stabilizing effect is not as good as that of emulsion stabilizer compound package 1.

[0099] 3. The average particle size of the fresh dilution of the emulsion stable compound package 1 with an addition amount of 2.0% is 33.52 nm. After standing for 120 hours, the average particle size is 33.37 nm, and the change before and after does not exceed 1 nm. In addition, the particles of the dilution before and after standing are concentrated, and there are no large particle agglomeration droplets.

[0100] 4. Compared with the cutting fluid without stabilizer, with 1.5% emulsion stable compound package 2, the commercial microemulsified cutting fluid, and with 1.5% emulsion stable compound package 1, the particle size of the diluted cutting fluid with stabilizer compound package is reduced, and the average particle size of emulsion stable compound package 1 is lower and the particle size distribution is more uniform. After standing for 120 hours, there are no large-sized agglomerated droplets, indicating that the emulsion stability of the cutting fluid is better at this time.

[0101] pass Fig.13 and Fig.14 The molecular structure of Emulsion Stabilizer 1 and Emulsion Stabilizer 2 can be explained as follows: Due to the presence of ether bonds in Emulsion Stabilizer 1 and Emulsion Stabilizer 2, the molecular structure has a certain polarity, and due to the presence of oxygen atoms in the ether bonds, it has a certain hydrophilicity. In addition, the carbon chain around the ether bond has a strong hydrophobicity. This combination of polarity and non-polarity can make the stabilizer molecules interact with water and oil droplets at the same time, thereby preventing the aggregation and sedimentation of water-in-oil droplets, which helps to maintain the stability of the emulsion.

[0102] On the other hand, due to the hydrophilicity and hydrophobicity in the molecular structure, when impure metal ions are introduced into the cutting fluid, the hydrophilic part can react with water molecules, and the hydrophobic part interacts with the metal ions, resulting in a certain interfacial activity. The interfacial activity can wrap the metal soap agglomerated molecules in the hydrophobic part, thereby preventing the aggregation of the agglomerated molecules.

[0103] In addition, the compound contains emulsion stabilizers with different HLB values ​​(the HLB value of emulsion stabilizer 1 is 9, the HLB value of emulsion stabilizer 2 is 10-12, and the HLB value of emulsion stabilizer 3 is 6). Among them, the emulsion stabilizer 3 with a low HLB value is easy to interact with the oil analysis in the cutting fluid and encapsulate it and disperse it into the water, and the emulsion stabilizers 1 and emulsion stabilizers 2 with high HLB values ​​are easy to interact with the water phase and the oil phase, so that the emulsion stabilizer compound can improve the emulsion stability.

[0104] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An emulsion stabilizing compound, characterized in that: The emulsion stabilizing compound comprises the following components in percentage by weight: Emulsion stabilizer 1: 26.32%~78.95%; Emulsion stabilizer 2: 13.16%~52.63%; Emulsion stabilizer 3: 2.6%~15.8%; The sum of the weight percentages of the above three components is 100%; Wherein, the emulsion stabilizer 1 is: rapeseed monoethanolamine polyoxyethylene ether, the emulsion stabilizer 2 is: glycolic acid ethoxylated oil ether, and the emulsion stabilizer 3 is: high molecular polymer surfactant Hypermer A70.

2. The emulsion stabilizing compound according to claim 1, characterized in that: The emulsion stabilizing compound comprises the following components in percentage by weight: Emulsion stabilizer 1: 52.63% Emulsion stabilizer 2: 39.47%; Emulsion stabilizer 3: 7.90%.

3. Use of the emulsion stabilizing compound as claimed in claim 1 or 2 in a microemulsion cutting fluid, characterized in that: The microemulsion cutting fluid comprises the following components in weight percentage: component A: 1% to 2%, Component B: 98%~99%, the sum of the weight percentages of component A and component B is 100%; wherein, component A: emulsion stabilizing compound, component B: cutting fluid basic composition, wherein component B includes: triethanolamine, monoethanolamine, ethylenediaminetetraacetic acid, base oil, octylphosphonic acid, methylbenzotriazole, siloxane ketone, s-triazine, 1,2-benzisothiazolin-3-one, polyether modified silicone defoamer, and water.

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