An easy-to-clean, high-lubricity, fully synthetic cutting fluid and its preparation method
By combining multi-effect phosphate C13-C15 with PEG400 surfactant and pH adjuster in fully synthetic cutting fluid, a composite agent is formed, which solves the problem of balancing lubrication and cleanliness in the processing of new energy battery trays, achieving efficient lubrication and rapid cleaning, and is suitable for the processing of new energy battery trays.
Patent Information
- Application Number
- CN202610170964.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-06
- Publication Date
- 2026-05-26
AI Technical Summary
Existing fully synthetic cutting fluids are difficult to balance lubrication performance and ease of cleaning in the processing of new energy battery trays, and they are also difficult to meet the lubrication requirements of high-speed milling cooling, tapping, and deep hole machining. Especially in production scenarios with large batches of battery trays and long continuous operation time, the chemical stability and resistance to contaminant interference of cutting fluids are insufficient.
Using multi-effect phosphate C13-C15 as a lubricant, combined with PEG400 surfactant and pH adjuster triethanolamine, the mixture is stirred and reacted under specific ratio and temperature control conditions to form a composite agent. This composite agent is then combined with polyether, neodecanoic acid, flocculant, bactericide and defoamer to prepare an easy-to-clean, highly lubricating, fully synthetic cutting fluid.
It achieves excellent lubricity, extreme pressure anti-wear properties, and cleanliness of cutting fluid, meeting the processing requirements of new energy battery trays. It features rapid cleaning and no residue, making it suitable for large-scale production.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of metal processing technology, and in particular relates to an easy-to-clean, high-lubricity, fully synthetic cutting fluid and its preparation method. Background Technology
[0002] Cutting fluid is a key medium used in the machining field for cooling, lubrication, and rust prevention, directly affecting machining accuracy, tool life, and workpiece surface quality. With the increasing demands for processing efficiency, environmental protection, and workpiece cleanliness in high-end manufacturing, especially the stringent requirements of the new energy industry for component processing, the shortcomings of traditional cutting fluids are becoming increasingly apparent: while mineral oil-based cutting fluids possess good lubricity, they easily attract metal shavings and dust, significantly increasing subsequent cleaning costs; their poor biological stability necessitates frequent replacement, affecting production continuity.
[0003] Fully synthetic cutting fluids, with their core advantages such as water-based easy cleaning, excellent cooling performance, and long service life, have become the preferred choice for processing new energy components. However, existing products often suffer from the problem of balancing lubrication performance and ease of cleaning, especially in the processing of new energy battery trays. As a key structural component carrying battery cells, battery trays are often made of lightweight, high-strength materials such as aluminum alloys and high-strength steel, and the processing steps are complex, placing multiple stringent requirements on the comprehensive properties of the cutting fluid: on the one hand, the oily agents added to existing products are difficult to clean and cannot meet cleanliness standards; on the other hand, they cannot simultaneously meet the cooling requirements of high-speed milling and the lubrication needs of tapping and deep hole machining. Furthermore, the large-volume, long-duration production of battery trays requires cutting fluids with strong chemical stability and resistance to contaminant interference. Therefore, developing a fully synthetic cutting fluid suitable for processing new energy battery trays, balancing excellent lubrication and load-bearing capacity, rapid and residue-free cleaning, and compatibility with both aluminum alloys and high-strength steel processing, is particularly important. Summary of the Invention
[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an easy-to-clean, high-lubricity, fully synthetic cutting fluid. This cutting fluid possesses excellent lubricity, extreme pressure anti-wear properties, cleanliness, and cooling properties, especially combining both lubricity and cleanliness, thus meeting the cutting fluid requirements in the field of new energy battery tray processing. This invention also provides a method for preparing this easy-to-clean, high-lubricity, fully synthetic cutting fluid.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention discloses an easy-to-clean, highly lubricating, fully synthetic cutting fluid, composed of the following components by weight percentage:
[0006] The sum of the weight percentages of all components is 100%.
[0007] In this invention, the pH adjuster is one or a mixture of two of N-methyldiethanolamine and triethanolamine in any proportion, preferably triethanolamine.
[0008] In this invention, the surfactant is PEG400; the lubricant is polyphosphate C13-C15.
[0009] Poly(hydroxyl) phosphate (C13-C15, carbon chain 13-15) is used as the lubricant in this invention. It is both oil and water soluble, has excellent extreme pressure properties, good adhesion, and strong film formation, but is not easy to clean. However, when poly(hydroxyl) phosphate is used in combination with surfactant and pH agent, and the reaction is carried out under stirring and sealing conditions with a certain ratio and temperature control, the product can significantly improve the cleanability of the system. In addition to significantly improving cleanability, it can also maintain its original excellent extreme pressure properties. Specifically, when added directly according to the formula: the tapping torque value is 95; after adding other additives not added in the original formula to the mixture after the reaction: the tapping torque is 98. (Using the MICROTAP TTT thread machining torque testing system).
[0010] The rust inhibitor is one or more of the following: dodecanoic acid, sebacic acid, and tricarboxylic acid.
[0011] In this invention, neodecanoic acid is a solubilizing organic acid; solubilizing organic acids refer to a class of organic compounds containing acidic functional groups such as carboxyl groups (-COOH), which can significantly improve the solubility of other poorly soluble substances (especially basic or amphoteric substances) in water or other media.
[0012] In this invention, the polyether is a reverse-block polyether, which is one or a mixture of two of 1720 and 1740 in any proportion. The polyether is used as a boundary lubricant in the cutting fluid in this invention.
[0013] The settling agent is Troy's EB77.
[0014] The bactericide is selected from one or a mixture of two of MBM and IPBC30 in any proportion; the defoamer is selected from FOAM BAN 575 silicone defoamer.
[0015] This invention also provides a method for preparing the aforementioned easy-to-clean, high-lubricity, fully synthetic cutting fluid, specifically including the following steps: S1. Preparation of composite agent Add lubricant and a certain amount of pH adjuster to a heating vessel, heat to 55-70℃, and stir continuously at 50 r / min for 90-120 min. Then, lower the temperature to 40-50℃, add surfactant, and stir continuously at 60-80 r / min for 180-200 min until a uniform transparent liquid with an apparent viscosity of 55-65 mm² / s, colorless or pale yellow, is obtained, which is the composite agent. The added pH adjuster is triethanolamine, and the mass ratio of triethanolamine, surfactant, and lubricant is (5.6-6):(1-2):(1-2). S2. At 0-40℃, add water, the remaining pH adjuster, and rust inhibitor to the reactor, stir for 30-60 minutes, then add polyether, neodecanoic acid, and the composite agent prepared in S1, and stir for 20-30 minutes until the mixture becomes transparent. S3. Finally, add the flocculant, bactericide, and defoamer and stir well.
[0016] Furthermore, the mass ratio of triethanolamine, surfactant, and lubricant added in S1 of the present invention is 3:1:1.
[0017] The compatibility mechanism of this invention is as follows: This invention combines a lubricant (polyphosphate C13-C15), a surfactant (PEG400), and a pH adjuster, and reacts them under stirring and sealing conditions in a certain proportion and with temperature control. The product can significantly improve the system's cleanliness and maintain its original excellent extreme pressure properties, resulting in a fully synthetic cutting fluid with excellent cleanliness and extreme pressure anti-wear properties.
[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The easy-to-clean, high-lubricity, fully synthetic cutting fluid of the present invention has excellent lubricity, extreme pressure anti-wear properties, cleanliness, and cooling properties. In particular, it combines both lubricity and cleanliness, meeting the cutting fluid requirements of the new energy battery tray processing field.
[0019] 2. The easy-to-clean, high-lubricity, fully synthetic cutting fluid of the present invention has readily available raw materials and a simple preparation method, making it suitable for large-scale production. Detailed Implementation
[0020] In this embodiment, an easy-to-clean, highly lubricating, fully synthetic cutting fluid comprises the following components by weight percentage:
[0021] The sum of the weight percentages of all components is 100%.
[0022] The preparation method of the easy-to-clean, high-lubricity fully synthetic cutting fluid in this embodiment includes the following steps: S1. Preparation of composite agent Add lubricant and a certain amount of pH adjuster to a heating vessel, heat to 55-70℃, and stir continuously at 50 r / min for 90-120 min. Then, lower the temperature to 40-50℃, add surfactant, and stir continuously at 60-80 r / min for 180-200 min until a uniform transparent liquid with an apparent viscosity of 55-65 mm² / s, colorless or pale yellow, is obtained, which is the composite agent. The added pH adjuster is triethanolamine, and the mass ratio of triethanolamine, surfactant, and lubricant is (5.6-6):(1-2):(1-2). S2. At 0-40℃, add water, the remaining pH adjuster, and rust inhibitor to the reactor, stir for 30-60 minutes, then add polyether, neodecanoic acid, and the composite agent prepared in S1, and stir for 20-30 minutes until the mixture becomes transparent. S3. Finally, add the flocculant, bactericide, and defoamer and stir well.
[0023] Furthermore, the mass ratio of triethanolamine, surfactant, and lubricant added in S1 of the present invention is 3:1:1.
[0024] The present invention will be further described below with reference to specific embodiments, but is not limited thereto. Example
[0025] Examples 1-5 provide an easy-to-clean, highly lubricating, fully synthetic cutting fluid. The proportions of each component by weight are shown in Table 1. Table 1. Proportions of each component in Examples 1-5 (unit: parts by weight)
[0026] The formulation components in the examples in Table 1 are used to produce the corresponding synthetic cutting fluid according to the preparation method of the easy-to-clean, high-lubricity fully synthetic cutting fluid described above, as shown below: Example
[0027] The preparation method of the easy-to-clean, high-lubricity, fully synthetic cutting fluid in Example 1 is as follows: S1 Preparation of Composite Agent Add 2 parts of poly(triethanolamine) phosphate C13-C15 and 5.6 parts of triethanolamine to a heating vessel, heat to 55-70°C, and stir continuously at 50 r / min for 90-120 min. Then, lower the temperature to 40-50°C, add 2 parts of PEG400, and stir continuously at 60-80 r / min for 180-200 min until a colorless or pale yellow uniform transparent liquid with an apparent viscosity of 55-65 mm² / s is obtained, which is the composite agent. S2 is prepared by adding water, the remaining pH adjuster, and rust inhibitor to the reaction vessel at 0-40℃ according to the formula ratio, stirring for 30-60 minutes, then adding polyether, neodecanoic acid, and the composite agent prepared by S1, and stirring for 20-30 minutes until the mixture becomes transparent. Finally, add the settling agent, bactericide, and defoamer to S3 and stir well. Example
[0028] The preparation method of the easy-to-clean, high-lubricity, fully synthetic cutting fluid in this embodiment differs from that in Example 1 in that: In step S1, 5.6 parts of triethanolamine, 1 part of polyphosphate C13-C15, and 1 part of PEG400 were added to prepare a composite agent. The remaining steps and processes were the same as in Example 1. Example
[0029] The preparation method of the easy-to-clean, high-lubricity, fully synthetic cutting fluid in this embodiment differs from that in Example 1 in that: In step S1, 5.8 parts of triethanolamine, 1.6 parts of polyphosphate C13-C15, and 1.6 parts of PEG400 were added to prepare a composite agent. The remaining steps and processes were the same as in Example 1. Example
[0030] The preparation method of the easy-to-clean, high-lubricity, fully synthetic cutting fluid in this embodiment differs from that in Example 1 in that: In step S1, 5.9 parts of triethanolamine, 1.8 parts of polyphosphate C13-C15, and 1.2 parts of PEG400 were added to prepare a composite agent. The remaining steps and processes were the same as in Example 1. Example
[0031] The preparation method of the easy-to-clean, high-lubricity, fully synthetic cutting fluid in this embodiment differs from that in Example 1 in that: In step S1, 6 parts of triethanolamine, 2 parts of polyphosphate C13-C15, and 2 parts of PEG400 were added to prepare a composite agent. The remaining steps and processes were the same as in Example 1.
[0032] Comparative Examples 1-5 prepared a fully synthetic cutting fluid, and the proportions of each component by weight are shown in Table 2: Table 2. Proportions of each component in Comparative Examples 1-5 (unit: parts by weight)
[0033] The corresponding synthetic cutting fluids were produced by using the formulation components in the comparative examples in Table 2. The specific preparation method is shown below: Comparative Example 1 The preparation method of the fully synthetic cutting fluid in this comparative example differs from that in Example 1 in that: In this comparative example, step S1 of Example 1 was not performed, and no composite agent was prepared. Instead, the components of the composite agent in the same proportion as in Example 1 were directly added to the reaction. The preparation method is as follows: S1. At 0-40℃, add water, 16 parts triethanolamine, 2 parts PEG400, 2 parts polyfunctional phosphate C13-C15, and rust inhibitor to the reactor according to the formula ratio, stir for 30-60 minutes, then add polyether and neodecanoic acid, stir for 20-30 minutes until the mixture is transparent. S2. Finally, add the settling agent, bactericide, and defoamer and stir well.
[0034] Comparative Example 2 The preparation method of the fully synthetic cutting fluid in this comparative example differs from that in Example 2 in that: In step S1, triethanolamine was not added to prepare the composite agent; the remaining steps and processes were the same as in Example 2.
[0035] Comparative Example 3 The preparation method of the fully synthetic cutting fluid in this comparative example differs from that in Example 3 in that: In step S1, PEG400 was not added to prepare the composite agent; the remaining steps and processes were the same as in Example 3.
[0036] Comparative Example 4 The preparation method of the fully synthetic cutting fluid in this comparative example differs from that in Example 4 in that: In step S1, the added ingredients were not heated or cooled, and the remaining steps and processes were the same as in Example 4.
[0037] Comparative Example 5 The preparation method of the fully synthetic cutting fluid in this comparative example differs from that in Example 5 in that: In step S1, 3.5 parts of triethanolamine, 3.5 parts of polyphosphate C13-C15, and 3.5 parts of PEG400 were added to prepare the composite agent. The remaining steps and processes were the same as in Example 5.
[0038] The products obtained from the examples and comparative examples were evaluated, and the results are shown in Table 3.
[0039] Table 3 Performance specifications of fully synthetic cutting fluids in the examples and comparative examples
[0040] The PB value (maximum non-seize load) in the table represents the maximum load at which steel balls can remain in a lubricated state without seizing under specific temperature and speed conditions. This indicator reflects the lubrication performance of the cutting fluid; a higher value indicates better lubrication performance.
[0041] According to the performance test results of Examples 1-5 and Comparative Examples 1-5 in Table 3, the corrosiveness of the fully synthetic cutting fluids prepared in Examples 1-5 is qualified, and their comprehensive performance is better than that of Comparative Examples 1-5. This shows that the easy-to-clean, high-lubricity fully synthetic cutting fluid of the present invention has excellent lubricity, extreme pressure anti-wear properties, cleanliness and cooling properties (all qualified by dyne pen test). In particular, it has both lubricity and cleanliness, which meets the needs of cutting fluid in the field of new energy component processing.
[0042] In Comparative Example 1, triethanolamine, polyhydroxypropyl phosphate (C13-C15), and PEG400 were directly added in a ratio of 5.6:2:2 without forming a composite agent. The appearance and cleaning performance of the diluted product failed to meet usage requirements. In Comparative Example 2, without adding triethanolamine, although a fully synthetic cutting fluid was obtained, the effective components were insufficient, the original cutting fluid was unstable, the diluted solution was slightly white, the pH value was low, and its lubricity, cleaning properties, and resistance to copper and aluminum corrosion were all unsatisfactory. In Comparative Example 3, PEG400 was not added, although... A fully synthetic cutting fluid was prepared, but the diluted solution was whitish, had poor water solubility, and failed both lubrication and cleaning properties. In Comparative Example 4, no heating or cooling treatment was performed during the preparation of the compound agent. Although the compound agent was prepared, the diluted solution was slightly whitish, had poor cleaning properties, and failed the dyne pen test. In Comparative Example 5, the three additives were not added in proportion and were added in excess during the preparation of the compound agent. Although the effective ingredients were sufficient and the lubrication performance was qualified, the original solution was unstable and prone to separation, and the diluted solution was whitish, had average water solubility, poor cleaning properties, and failed the dyne pen test.
[0043] In summary, the results indicate that to prepare an easy-to-clean, highly lubricating, fully synthetic cutting fluid, it is essential to combine multi-effect phosphate ester, surfactant PEG400, and a pH adjuster, and then react them under controlled temperature and stirring to obtain a clear complex. This complex should then be formulated according to the preparation method for fully synthetic cutting fluids. Only then can the final product simultaneously achieve excellent lubrication and load-bearing capacity, rapid and residue-free cleaning, and compatibility with both aluminum alloys and high-strength steel machining.
Claims
1. An easy-to-clean, highly lubricating, fully synthetic cutting fluid, characterized in that... It consists of the following components by weight percentage: The sum of the weight percentages of all components is 100%.
2. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The pH adjuster is one or a mixture of two of N-methyldiethanolamine and triethanolamine in any proportion.
3. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The surfactant is PEG400.
4. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The lubricant is a polyphosphate ester C13-C15.
5. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The polyether is a reverse block polyether, which is one or a mixture of two of 1720 and 1740 in any proportion.
6. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The rust inhibitor is one or more of dodecanoic acid, sebacic acid, and tricarboxylic acid.
7. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The settling agent is Troy's EB77.
8. The easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 1, characterized in that... The bactericide is selected from one or a mixture of two of MBM and IPBC30 in any proportion; the defoamer is selected from FOAM BAN 575 silicone defoamer.
9. A method for preparing an easy-to-clean, highly lubricating, fully synthetic cutting fluid according to any one of claims 1 to 8, characterized in that... Includes the following steps: S1. Preparation of composite agent Add lubricant and a certain amount of pH adjuster to a heating vessel, heat to 55-70℃, and stir continuously at 50 r / min for 90-120 min. Then, lower the temperature to 40-50℃, add surfactant, and stir continuously at 60-80 r / min for 180-200 min until a colorless or pale yellow, uniform, transparent liquid with an apparent viscosity of 55-65 mm² / s is obtained, which is the composite agent. The added pH adjuster is triethanolamine, and the mass ratio of triethanolamine, surfactant, and lubricant is (5.6-6):(1-2):(1-2). S2. At 0-40℃, add water, the remaining pH adjuster, and rust inhibitor to the reactor, stir for 30-60 minutes, then add polyether, neodecanoic acid, and the composite agent prepared in S1, and stir for 20-30 minutes until the mixture becomes transparent. S3. Finally, add the flocculant, bactericide, and defoamer and stir well.
10. The method for preparing the easy-to-clean, high-lubricity, fully synthetic cutting fluid according to claim 9, characterized in that... The mass ratio of the triethanolamine, surfactant, and lubricant added in S1 is 3:1:1.