High-lubricity environment-friendly cutting fluid compatible with various materials

Abstract

The invention discloses a high-lubricity environment-friendly cutting fluid compatible with various materials. The high-lubricity environment-friendly cutting fluid comprises the following components in percentage by weight: 0.4-1% of sodium xylene sulfonate, 2-4% of sebacic acid, 5-8% of neodecanoic acid, 8-15% of 1720 polyether, 4-10% of sasol FS40 polyether, 5-12% of Mili self-emulsifying ester 18485, 1-4% of extreme pressure antiwear agent, 0.4-1.2% of cation, 8-18% of triethanolamine, 3-6% of CH020, 1-3% of nano-copper, 0.05-0.15% of defoaming agent and the balance of water. Compared with the prior art, the machining of various metal materials can be met, the application range is wide, and good rust resistance and corrosion resistance are achieved.

Description

Technical Field

[0001] This invention relates to the field of cutting fluid technology, and in particular to a highly lubricating and environmentally friendly cutting fluid that is compatible with a variety of materials. Background Technology

[0002] Cutting fluid (or coolant) is an industrial liquid used in metal cutting and grinding processes to cool and lubricate cutting tools and workpieces. It is a scientifically formulated blend of various high-performance additives, possessing excellent cooling, lubrication, rust prevention, degreasing and cleaning properties, corrosion protection, and easy dilution. Cutting fluids are classified as emulsified, semi-synthetic, and fully synthetic. Fully synthetic cutting fluids, in particular, exhibit strong stability and superior cooling performance.

[0003] Currently available cutting fluids all have certain shortcomings. The main shortcomings are: existing cutting fluids for machining magnesium alloys generally offer limited protection and hard water resistance, with hard water resistance typically between 2000-3000 ppm; they provide poor protection when machining copper and have poor resistance to copper ions in hard water; most existing cutting fluids cannot simultaneously meet the lubrication requirements for machining stainless steel, titanium alloys, and aluminum alloys; and most cutting fluids for machining cast iron and carbon steel generally have limited rust prevention and corrosion resistance. Summary of the Invention

[0004] The present invention proposes a highly lubricating and environmentally friendly cutting fluid that is compatible with a variety of materials, can meet the processing needs of various metal materials, has a wide range of applications, and has good rust prevention and corrosion resistance.

[0005] Therefore, the present invention provides a highly lubricating and environmentally friendly cutting fluid compatible with various materials, comprising the following components by weight percentage: Sodium xylenesulfonate 0.4-1% Sebacic acid 2-4% Neodecanoic acid 5-8% 1720 polyether 8-15% Sasol FS40 polyether 4-10% Mickey Self-Emulsifying Ester 1848 5-12% Extreme pressure anti-wear agent 1-4% Cations 0.4-1.2% Triethanolamine 8-18% CH020 3-6% Nano copper 1-3% Defoamer 0.05-0.15% Water balance.

[0006] As a further description of the above technical solution: A highly lubricating and environmentally friendly cutting fluid compatible with various materials comprises the following components by weight percentage: sodium xylenesulfonate 0.6-0.9%, sebacic acid 2.5-3.6%, neodecanoic acid 5.5-7.5%, 1720 polyether 8.5-14%, Sasol FS40 polyether 5-9%, Mickey self-emulsifying ester 1848 6-11%, extreme pressure anti-wear agent 1.5-3.6%, cationic agent 0.6-1%, triethanolamine 9-16%, CHO2O 3.5-5.5%, nano copper 1.5-2.6%, defoamer 0.06-0.12%, and water as the balance.

[0007] As a further description of the above technical solution: A highly lubricating and environmentally friendly cutting fluid compatible with various materials comprises the following components by weight percentage: sodium xylenesulfonate 0.7%, sebacic acid 3%, neodecanoic acid 6%, 1720 polyether 10%, Sasol FS40 polyether 6%, Mickey self-emulsifying ester 18488%, extreme pressure anti-wear agent 2%, cationic 0.8%, triethanolamine 12%, CH020 4%, nano copper 2%, defoamer 0.1%, and water as the balance.

[0008] As a further description of the above technical solution: The cation is BC77 cation.

[0009] As a further description of the above technical solution: The defoamer is 575 defoamer.

[0010] As a further description of the above technical solution: The extreme pressure anti-wear agent is Solvay LP700.

[0011] As a further description of the above technical solution: The preparation method of this cutting fluid includes the following steps: 1) Prepare all materials according to any of the proportions described above; 2) Add water, triethanolamine, BC77 cation, sebacic acid, and neodecanoic acid to a 250ml beaker according to the above proportions, and stir at room temperature until uniform and transparent; 3) Add sodium xylenesulfonate, 1720 polyether, Sasol FS40 polyether, Mickey self-emulsifying ester 1848, CH020, and nano copper to the aforementioned uniform and transparent liquid, and stir at 30℃-50℃ until uniform and transparent.

[0012] As a further description of the above technical solution: The stirring temperature in step 3) is 40℃.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. Wide range of applications, capable of simultaneously meeting the processing needs of various metal materials.

[0014] 2. This cutting fluid has an extremely high resistance to hard water, capable of withstanding hard water of over 10,000 ppm, and excellent protection for magnesium alloys, fully meeting the stringent conditions required for magnesium alloy machining.

[0015] 3. It has excellent copper protection capabilities and can withstand copper ions at around 2000 ppm.

[0016] 4. It has excellent lubrication performance, meeting the requirements for machining stainless steel, titanium alloy and aluminum alloy.

[0017] 5. It has excellent rust prevention and corrosion resistance, and can be used to process cast iron and carbon steel materials.

[0018] 6. Using 1720 polyether and Sasol FS40 polyether simultaneously can achieve synergistic performance improvement through complementary hydrophilic and oleophilic balance values. The core benefit is to obtain both excellent lubricity and outstanding cleaning ability. Detailed Implementation

[0019] Exemplary embodiments of this disclosure will now be described in more detail. While exemplary embodiments of this disclosure have been shown, it should be understood that this disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0020] Basic information on the chemical additives involved: Sodium xylenesulfonate: Reduces the interfacial tension between oil and water, promotes the dispersion of mineral oil and other components in water, and forms a stable emulsion. Its hydrophilic and lipophilic groups in its molecular structure can be directionally adsorbed at the oil-water interface, forming a thin film with high mechanical strength, preventing emulsion stratification or aggregation, and forming a protective film on metal surfaces to inhibit oxidation reactions. Its electrolyte properties (dissociation into sodium ions and sulfonate ions) may enhance the adsorption capacity of rust inhibitors and improve the rust-preventive effect of cutting fluids.

[0021] Sebacic acid: It has excellent rust-preventive properties. The carboxyl group (-COOH) in its molecule can react with the metal surface to form a dense protective film, blocking the contact between the metal and corrosive media such as moisture and oxygen. When combined with amine compounds, it can form a more stable rust-preventive complex, significantly improving rust prevention performance. Sebacic acid can effectively reduce friction during the cutting process, reduce tool wear, and improve the extreme pressure lubrication capacity of cutting fluids, maintaining lubrication effect under high temperature and high pressure conditions. In addition, sebacic acid has good resistance to hard water and is suitable for different water quality conditions.

[0022] Triethanolamine: Triethanolamine reacts with oily agents (such as oleic acid) through its hydroxyl group (-OH) to form a water-soluble complex (such as triethanolamine oleate), allowing non-water-soluble lubricating components to be uniformly dispersed in a water-based system. This complex can form a physical adsorption film between the tool and the chips, effectively reducing the coefficient of friction. As a water-soluble rust inhibitor, triethanolamine can form a protective film on the metal surface, inhibiting oxidation reactions. As a nonionic surfactant, triethanolamine can significantly reduce the surface tension of water, improve the wettability and penetration efficiency of the cutting fluid, promote the rapid entry of coolant into the machining interface, reduce cutting heat accumulation, and enhance the cleaning effect.

[0023] Neodecanoic acid (NCA) forms a lubricating film on metal surfaces, reducing the coefficient of friction between the tool and workpiece, decreasing cutting force and heat buildup, thereby protecting the tool and improving machining accuracy and surface finish. Its branched structure helps enhance the stability of the lubricating film, particularly evident in high-speed cutting. It forms a protective layer on metal surfaces, effectively isolating corrosive media such as moisture and oxygen, preventing rust on workpieces and machine tools, extending equipment lifespan, and disrupting bacterial cell membranes to inhibit microbial growth, preventing the cutting fluid from deteriorating and becoming foul due to biological contamination, thus maintaining the cleanliness and performance stability of the cutting fluid. This characteristic is crucial for extending cutting fluid replacement cycles and reducing maintenance costs.

[0024] Sasol FS40 polyether: It can form a lubricating film, reduce friction between the tool and the workpiece, reduce cutting resistance, extend tool life and improve the surface finish of the machined parts. The polar groups in its molecular structure can be adsorbed on the metal surface, isolating corrosive media (such as water, oxygen and salts), effectively preventing the workpiece and machine tool parts from rusting. The water solubility of FS40 polyether helps to disperse impurities such as chips and iron powder, enhances the cleaning ability of cutting fluid, and reduces machine tool contamination.

[0025] 1720 polyether: Primarily used as a surface lubricant and defoamer, it adsorbs onto metal surfaces through its block polyether segments in its molecular structure, forming a stable lubricating film that reduces friction between the tool and workpiece, lowers wear, and extends tool life. In high-pressure jet systems, 1720 polyether effectively suppresses foam formation, maintains the stability of the cutting fluid, and prevents cooling efficiency reduction or equipment interruption caused by foam.

[0026] Mickey Self-Emulsifying Ester 1848: Through its special molecular structure, it forms a protective film on the metal surface, reducing friction and tool wear. Its lubrication effect is comparable to that of tetrameric castor oil ester, and its anti-wear performance is superior to that of traditional polyether lubricants. This additive generates less foam, which helps maintain the stability of the cutting fluid and reduces lubrication interruption or cooling efficiency reduction caused by foam during processing. It has good biodegradability and low toxicity, meets environmental protection requirements, and is suitable for environmentally sensitive processing scenarios.

[0027] Solvay LP700: Primarily used as a water-based extreme pressure anti-wear agent, low-foaming lubricant, and wetting surfactant, it can improve lubrication performance, reduce foaming, enhance rust prevention, improve the wettability of cutting fluid on metal surfaces, and promote the dispersion and removal of chips and impurities.

[0028] BC77 cationic fluid: Its main functions are sterilization, algae removal, impurity sedimentation, and demulsification. BC77 can inhibit or kill bacteria, algae, and other microorganisms in cutting fluids within a wide pH range, preventing spoilage, odor, and performance degradation caused by microbial contamination. Its cationic properties can adsorb suspended particles such as iron filings and non-metallic powders, promote impurity sedimentation, keep the cutting fluid clean, and extend its service life. By disrupting the interface between oil droplets and suspended particles, it improves the uniformity and fluidity of the cutting fluid and reduces oil-water separation.

[0029] CH020: As a co-emulsifier and neutralizer, it can stabilize the emulsion system of water-based cutting fluid, adjust the pH value, reduce the precipitation of metallic cobalt, improve the stability of the system, inhibit the growth of microorganisms, extend the service life of the cutting fluid, and enhance the rust prevention effect through its alkaline properties, thus protecting machine tools and workpieces.

[0030] Nano copper (Frank patent: CN201910666577.9 Preparation method of self-dispersible nano copper with long organic carbon chains, nano copper formulation and its application): can be directly, stably and uniformly dispersed in cutting fluids, and can replace functional additives in traditional cutting fluid formulations, including one or more of the following: corrosion inhibitors, rust inhibitors, bactericides, anti-pressure agents, and lubricants. On the one hand, it enables the cutting fluid to have efficient anti-corrosion, rust prevention, anti-pressure, lubrication and bactericidal properties. On the other hand, it greatly simplifies the cutting fluid formulation system, reduces production costs and simplifies production steps.

[0031] 575 defoamer: Its role in cutting fluid is to eliminate and suppress foam, ensuring the stability of the cutting fluid's cooling, lubrication, and other properties, thereby improving machining efficiency and workpiece quality. Example 1:

[0032] In a 250ml beaker, add water, 12% triethanolamine, 0.8% BC77 cationic acid, 3% sebacic acid, and 6% neodecanoic acid by weight fraction. Stir at room temperature until transparent. Then, add 0.7% sodium xylenesulfonate, 10% 1720 polyether, 6% Sasol FS40 polyether, 8% Mickey self-emulsifying ester 1848, 2% Solvay LP700, 0.8% cationic acid, 4% CHO2O, 2% nano copper, and 0.1% defoamer to the above transparent liquid. Stir at 40°C until uniform and transparent to obtain the cutting fluid of the present invention.

[0033] This metalworking fluid was compared with two commonly available metalworking fluids, a semi-synthetic type A and an emulsified type B. All factors used in the comparative experiments, including pure water, nitrite, formaldehyde, tapping torque meter, workpiece cleaning, and experimental environment, remained consistent; the only variable was the type of metalworking fluid.

[0034] The three metalworking fluids were prepared with 5% concentrations in 5000ppm hard water and 10000ppm hard water to observe their hard water resistance performance. Then, a 5% tap water dilution was prepared to test the formaldehyde and nitrite content.

[0035]

[0036] Comparison Results: Under the same environment and testing methods, experiments on hard water stability and harmful substances in three different types of cutting fluids showed that the patented cutting fluid had the best hard water resistance and did not contain nitrosamines or formaldehyde. Type A and Type B metalworking fluids both exhibited soap formation and contained harmful substances. The experimental results indicate that the patented cutting fluid is stable and environmentally friendly. Example 2:

[0037] The three metalworking fluids were prepared into 10% tap water dilutions, and their lubrication was tested using a titanium alloy tapping torque meter.

[0038]

[0039] Comparison Results: Under the same environment and testing methods, lubrication experiments conducted on three different types of cutting fluids showed that the patented cutting fluid had the best lubrication, followed by type B metalworking fluid, while type A metalworking fluid had the worst lubrication. The results indicate that the patented cutting fluid has excellent lubrication, meeting demanding machining processes, and achieving good machining results even at relatively low concentrations. Example 3:

[0040] The three metalworking fluids were prepared into 5% concentrations of tap water dilution, and then the protective properties of each product on aluminum alloys, magnesium alloys, and copper sheets were tested in a 40℃ constant temperature water bath test tank.

[0041]

[0042] Note: Grade A is the best in terms of protection performance, indicating that the metal material does not change color or oxidize before and after immersion; Grade C is the worst, indicating that the metal material turns black, changes color, or oxidizes after immersion.

[0043] Comparison results: Under the same environment and the same testing method, the metal immersion experiments conducted with three different types of cutting fluid showed that the patented cutting fluid provided the best protection for several metal blocks.

[0044] Experiment 4: Three metalworking fluids were prepared into 10% dilutions, and their cleaning performance was tested by processing workpieces.

[0045]

[0046] Experiment 5: The rust prevention performance of the three cutting fluids was tested by preparing them with tap water at concentrations of 5%, 3%, and 2% respectively (cast iron chip method).

[0047]

[0048] Comparison results: In terms of rust prevention, under the same experimental conditions, the patented cutting fluid has the best rust prevention performance. In actual processing, it can better prevent the machine tools and workpieces from rusting, reducing unnecessary troubles.

[0049] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. It has a wide range of applications and can simultaneously meet the processing needs of various metal materials.

[0050] 2. This cutting fluid has an extremely high resistance to hard water, capable of withstanding hard water of over 10,000 ppm, and excellent protection for magnesium alloys, fully meeting the demanding conditions required for magnesium alloy machining.

[0051] 3. It has excellent copper protection capabilities and can withstand copper ions at around 2000 ppm.

[0052] 4. It has excellent lubrication properties, meeting the requirements for machining stainless steel, titanium alloys and aluminum alloys.

[0053] 5. It has excellent rust prevention and corrosion resistance, and can be used to process cast iron and carbon steel materials.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A highly lubricating and environmentally friendly cutting fluid compatible with multiple materials, characterized in that, Includes the following components by weight percentage: Sodium xylenesulfonate 0.4-1% Sebacic acid 2-4% Neodecanoic acid 5-8% 1720 polyether 8-15% Sasol FS40 polyether 4-10% Mickey Self-Emulsifying Ester 1848 5-12% Extreme pressure anti-wear agent 1-4% Cations 0.4-1.2% Triethanolamine 8-18% CH020 3-6% Nano copper 1-3% Defoamer 0.05-0.15% Water balance.

2. The highly lubricating and environmentally friendly cutting fluid compatible with multiple materials according to claim 1, characterized in that, The product comprises the following components by weight percentage: sodium xylenesulfonate 0.6-0.9%, sebacic acid 2.5-3.6%, neodecanoic acid 5.5-7.5%, 1720 polyether 8.5-14%, Sasol FS40 polyether 5-9%, Mickey self-emulsifying ester 1848 6-11%, extreme pressure anti-wear agent 1.5-3.6%, cationic 0.6-1%, triethanolamine 9-16%, CHO20 3.5-5.5%, nano copper 1.5-2.6%, defoamer 0.06-0.12%, and water as the balance.

3. The high-lubricity, environmentally friendly cutting fluid compatible with multiple materials according to claim 1, characterized in that, The composition includes the following components by weight percentage: sodium xylenesulfonate 0.7%, sebacic acid 3%, neodecanoic acid 6%, 1720 polyether 10%, Sasol FS40 polyether 6%, Mickey self-emulsifying ester 1848 8%, extreme pressure anti-wear agent 2%, cationic 0.8%, triethanolamine 12%, CH020 4%, nano copper 2%, defoamer 0.1%, and water as the balance.

4. A highly lubricating and environmentally friendly cutting fluid compatible with multiple materials according to any one of claims 1-3, characterized in that, The cation is BC77 cation.

5. A highly lubricating and environmentally friendly cutting fluid compatible with multiple materials according to any one of claims 1-3, characterized in that, The defoamer is 575 defoamer.

6. A highly lubricating and environmentally friendly cutting fluid compatible with multiple materials according to any one of claims 1-3, characterized in that, The extreme pressure anti-wear agent is Solvay LP700.

7. A highly lubricating and environmentally friendly cutting fluid compatible with multiple materials according to any one of claims 1, characterized in that, The preparation method of this cutting fluid includes the following steps: 1) Prepare the materials according to the proportions described in any one of claims 1-6; 2) Add water, triethanolamine, BC77 cation, sebacic acid, and neodecanoic acid to a 250ml beaker according to the above proportions, and stir at room temperature until uniform and transparent; 3) Add sodium xylenesulfonate, 1720 polyether, Sasol FS40 polyether, Mickey self-emulsifying ester 1848, CH020, and nano copper to the aforementioned uniform and transparent liquid, and stir at 30℃-50℃ until uniform and transparent.

8. The method for preparing a highly lubricating and environmentally friendly cutting fluid compatible with multiple materials according to claim 7, characterized in that, The stirring temperature in step 3) is 40℃.

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