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CN-122012170-A - Preparation method of rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid

CN122012170ACN 122012170 ACN122012170 ACN 122012170ACN-122012170-A

Abstract

The invention provides a preparation method of an antirust and anticorrosive fully-synthesized magnetic material cutting fluid, which comprises the steps of adding 30% -40% of total deionized water, adding 8% -12% of monoethanolamine and 5% -8% of triethanolamine which are mixed uniformly, adding 5% -8% of dodecanedioic acid, 3% -5% of sebacic acid and 0.5% -1.5% of 5-methylbenzotriazole, heating to 65-75 ℃, stirring at constant temperature for reacting for 60-120 minutes, cooling to 30-40 ℃, adding the rest deionized water, then adding 0.5% -5.0% of modified hyperbranched polyester, then adding 0.5% -3% of modified nano silicon dioxide sol, adding 3% -8% of polyether L-64, 1% -2% of triazine bactericide and 0.1% -0.3% of organosilicon defoamer, stirring uniformly, and filtering to obtain the antirust fully-synthesized magnetic material cutting fluid. The cutting fluid prepared by the invention has the advantages of high-efficiency lubrication, specific sedimentation and long-term stability.

Inventors

  • XU LIXIA
  • WU XIUYOU
  • LI HAOHUA

Assignees

  • 海宁市中科新材料有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. The preparation method of the rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid is characterized in that the sum of the weight percentages of all the components in the rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid is 100%, deionized water is the balance, and the method comprises the following steps: S1, adding 30% -40% of total deionized water in a formula into a reaction kettle, adding monoethanolamine accounting for 8% -12% of the total weight of the cutting fluid and triethanolamine accounting for 5% -8% of the total weight of the cutting fluid, uniformly mixing, then adding dodecanedioic acid accounting for 5% -8% of the total weight of the cutting fluid, sebacic acid accounting for 3% -5% and 5.5% -1.5% of 5-methylbenzotriazole, heating to 65-75 ℃, and stirring at constant temperature for reacting for 60-120 minutes to obtain an antirust base fluid; S2, cooling the rust-proof base solution to 30-40 ℃, adding the rest deionized water, then adding modified hyperbranched polyester accounting for 0.5-5.0% of the total weight of the cutting fluid, uniformly stirring, then adding modified nano silicon dioxide sol accounting for 0.5-3% of the total weight of the cutting fluid, and uniformly stirring; S3, adding polyether L-64 accounting for 3% -8% of the total weight of the cutting fluid, triazine bactericide accounting for 1% -2% and organic silicon defoamer accounting for 0.1% -0.3%, uniformly stirring, and filtering to obtain the cutting fluid; The modified hyperbranched polyester is hydroxyl-terminated hyperbranched polyester modified by long-chain fatty acid and binary anhydride, and the modified nano silica sol is acidic silica sol modified by a silane coupling agent containing epoxy groups.
  2. 2. The method for preparing the rust-proof and corrosion-proof fully-synthetic magnetic material cutting fluid according to claim 1, wherein in the step S1, the temperature of the constant-temperature stirring reaction is 70 ℃ and the time is 90 minutes.
  3. 3. The preparation method of the rust-proof and corrosion-proof fully-synthetic magnetic material cutting fluid disclosed by claim 1 is characterized in that in the step S2, the temperature of low-temperature compounding is controlled below 35 ℃, stirring is carried out for 15 minutes after modified hyperbranched polyester is added, and then modified nano silicon dioxide sol is slowly added dropwise and stirred for 20 minutes.
  4. 4. The method for preparing the rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid according to claim 1 is characterized in that the method for preparing the modified hyperbranched polyester is as follows: taking trimethylolpropane as a core and 2, 2-bis (hydroxymethyl) propionic acid as a monomer, and performing melt polycondensation at 140 ℃ to prepare hydroxyl-terminated hyperbranched polyester; then adding oleic acid at 160 ℃ for esterification reaction, cooling to 90 ℃ and adding succinic anhydride for ring-opening reaction.
  5. 5. The method for preparing the rust-proof and corrosion-proof fully-synthetic magnetic material cutting fluid according to claim 4, wherein the addition of the oleic acid accounts for 30% of the hydroxyl mole number of the hydroxyl-terminated hyperbranched polyester, and the addition of the succinic anhydride accounts for 40% of the hydroxyl mole number of the hydroxyl-terminated hyperbranched polyester.
  6. 6. The method for preparing the rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid according to claim 1 is characterized in that the method for preparing the modified nano silicon dioxide sol is as follows: Dissolving gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane in ethanol water solution, and dripping the solution into acidic silica sol with the particle size of 15nm for grafting reaction.
  7. 7. The method for preparing the rust-proof and corrosion-proof fully-synthetic magnetic material cutting fluid according to claim 6, wherein the grafting reaction condition is reflux reaction for 4 hours at 60 ℃.
  8. 8. The preparation method of the rust-proof corrosion-proof fully-synthesized magnetic material cutting fluid is characterized in that polyether L-64 is ethylene oxide/propylene oxide block polyether, and the nonferrous metal corrosion inhibitor is 5-methylbenzotriazole.
  9. 9. The method for preparing the rust-proof and corrosion-proof fully-synthetic magnetic material cutting fluid according to claim 1, wherein in the step S3, the filtering is performed by adopting a filter bag with the precision of 1 μm.
  10. 10. The preparation method of the rust-proof corrosion-proof fully-synthetic magnetic material cutting fluid is characterized in that the addition amount of the components is 3% of modified hyperbranched polyester, 2% of modified nano silicon dioxide sol, 8% of monoethanolamine, 7% of triethanolamine, 6% of dodecanedioic acid, 4% of sebacic acid, 1% of 5-methylbenzotriazole, 1% to 64% of polyether L, 5% of triazine bactericide and 0.2% of organosilicon defoamer.

Description

Preparation method of rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid Technical Field The invention relates to a preparation method of a magnetic material cutting fluid, in particular to a preparation method of an antirust and anticorrosive fully-synthesized magnetic material cutting fluid for processing rare earth permanent magnetic materials such as neodymium iron boron and the like, and belongs to the technical field of rare earth material processing lubrication. Background The neodymium-iron-boron rare earth permanent magnet material is widely applied to the fields of new energy automobiles, wind power generation, precision electronics and the like due to the excellent magnetic property. However, the chemical property of the neodymium-iron-boron material is very active, and the rich neodymium phase is very easy to generate oxidation corrosion. Meanwhile, the material has high hardness, high brittleness and extremely high processing difficulty. In slicing, wire cutting and grinding processes, cutting fluids must be used to perform cooling, lubrication, rust prevention and cleaning functions. Although the traditional oil-based cutting fluid has good lubricating performance, the traditional oil-based cutting fluid has poor heat dissipation, is inflammable and difficult to clean, and is difficult to meet the requirements of modern high-speed processing. Currently, fully synthetic water-based cutting fluids are mainly used in the industry. However, the existing fully synthetic water-based cutting fluid cannot effectively coordinate contradiction between sedimentation and depletion of active ingredients. Neodymium iron boron processing produces a large amount of fine magnetic powder, and in order to accelerate sedimentation, linear polymeric flocculants are generally added in the prior art. However, the flocculant such as polyacrylamide mainly relies on long chain winding and charge neutralization to carry out indiscriminate flocculation, so that effective components such as lubricant, antirust agent and the like in the cutting fluid are easily coated in the magnetic mud to be precipitated together, the effective concentration of the cutting fluid is rapidly reduced, and the service life is shortened. Secondly, the existing total synthetic water-based cutting fluid mainly relies on water-soluble polyether to provide lubrication, and a physical adsorption film formed on the metal surface is low in strength. Under the high shearing processing condition of neodymium iron boron, the lubricating film is easy to break, so that the cutter is worn quickly and the surface of a workpiece is scratched. In addition, in order to solve the problem of poor corrosion resistance caused by the porous surface of the neodymium iron boron, the hole sealing is carried out by introducing nano silicon dioxide. However, under the high ionic strength environment of the fully synthetic cutting fluid, the double electric layers of the common charge stable silica sol can be compressed, and coagulation is easy to occur, so that the layering failure of the product is caused. Disclosure of Invention Based on the background, the invention aims to provide a preparation method of an antirust and anticorrosive fully-synthesized magnetic material cutting fluid, which achieves the aims of high-efficiency lubrication, specific sedimentation and long-acting stability of the fully-synthesized magnetic material cutting fluid by introducing specific modified hyperbranched polymers and space-stable nanosol and matching with a step-wise constant-temperature chelating process. In order to achieve the above object, the present invention provides the following technical solutions: The preparation method of the rust-proof and corrosion-proof fully-synthesized magnetic material cutting fluid comprises the following steps of: S1, adding 30% -40% of total deionized water in a formula into a reaction kettle, adding monoethanolamine accounting for 8% -12% of the total weight of the cutting fluid and triethanolamine accounting for 5% -8% of the total weight of the cutting fluid, uniformly mixing, then adding dodecanedioic acid accounting for 5% -8% of the total weight of the cutting fluid, sebacic acid accounting for 3% -5% and 5.5% -1.5% of 5-methylbenzotriazole, heating to 65-75 ℃, and stirring at constant temperature for reacting for 60-120 minutes to obtain an antirust base fluid; S2, cooling the rust-proof base solution to 30-40 ℃, adding the rest deionized water, then adding modified hyperbranched polyester accounting for 0.5-5.0% of the total weight of the cutting fluid, uniformly stirring, then adding modified nano silicon dioxide sol accounting for 0.5-3% of the total weight of the cutting fluid, and uniformly stirring; S3, adding polyether L-64 accounting for 3% -8% of the total weight of the cutting fluid, triazine bactericide accounting for 1% -2% and organic silicon defoamer accounting for 0.1% -0.3%, uniformly stirri