Temperature-resistant lubricant for gear and preparation method of temperature-resistant lubricant

Abstract

The invention relates to the field of lubricants, and discloses a temperature-resistant lubricant for gears and a preparation method thereof, the temperature-resistant lubricant for gears comprises the following components by weight: 50-70 parts of base oil, 10-20 parts of ester oil, 5-15 parts of a tackifier, 3-8 parts of a modified nano composite filler, and 2-5 parts of a borate ionic liquid; the modified nano composite filler is prepared by using hexagonal boron nitride as a carrier, modifying magnetic nano ferroferric oxide particles and ZIF-8 nano particles on the surface of the carrier, then performing surface modification by using dopamine, and covalently connecting dialkyl dithiophosphate; the boric acid ester ionic liquid is prepared by the following steps: modifying N-butylimidazole by using 3-bromopropyl methyl ether to obtain ionic liquid, then reacting salicylic acid, boric acid and lithium carbonate, and then mixing and reacting with the ionic liquid. And the lubricant is endowed with excellent antifriction and antiwear properties and oxidation resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubricants, and particularly relates to a high-temperature resistant lubricant for gears and a preparation method thereof. Background Art

[0002] Gear transmission is one of the oldest transmission methods and is also one of the most widely used transmissions in modern industry. Gear transmission is achieved by the interaction and relative movement between meshing tooth surfaces, and friction will inevitably occur during this process. To reduce friction, wear, and extend the service life, a suitable gear lubricant is usually selected to separate the tooth surfaces and avoid direct metal-to-metal friction. Gear oil is a special lubricant required for gear transmission devices and is composed of a base oil and various functional additives.

[0003] With the continuous upgrading of emerging industries in recent years, the precision of mechanical equipment has been continuously improved, and the load demand has been continuously increasing. The market has put forward higher requirements for industrial gear oils in terms of gear scuffing, friction and wear, oxidation stability, shear stability, corrosion protection, fatigue pitting, etc. Hexagonal boron nitride has excellent thermal stability, good thermal conductivity, high-temperature resistance, and good mechanical strength, etc., and has received extensive attention in the lubricant field. However, the anti-wear and friction-reducing effect of single hexagonal boron nitride is limited, and due to its chemical inertness and relatively high surface energy, its dispersibility in oil is relatively poor, which greatly limits the lubrication performance of hexagonal boron nitride. Moreover, gears have the characteristics of large load, high local temperature, and strong impact load during operation, which requires gear oils to have excellent extreme pressure performance, friction reduction and anti-wear performance, and antioxidant performance, etc., to prevent sintering and scuffing of gear sets. Summary of the Invention

[0004] To solve the deficiencies mentioned in the above background art, the purpose of the present invention is to provide a high-temperature resistant lubricant for gears and a preparation method thereof, which are added with modified nano-composite fillers and borate ionic liquids, endowing the lubricant with excellent friction reduction and anti-wear performance and antioxidant performance.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 50 - 70 parts of base oil, 10 - 20 parts of ester oil, 5 - 15 parts of thickener, 3 - 8 parts of modified nano-composite filler, and 2 - 5 parts of borate ionic liquid;

[0007] The modified nano-composite filler is prepared by using hexagonal boron nitride as a carrier, modifying magnetic nano-ferroferric oxide particles and ZIF-8 nano-particles on its surface, and then modifying the surface with dopamine and covalently connecting dialkyldithiophosphate; the borate ionic liquid is prepared by modifying N-butylimidazole with 3-bromopropyl methyl ether to obtain an ionic liquid, and then reacting salicylic acid, boric acid, and lithium carbonate and mixing the reaction with the ionic liquid.

[0008] Preferably, the base oil is one or a mixture of synthetic hydrocarbon oil, silicone oil, alkylbenzene, oil-soluble polyether, and synthetic ester oil.

[0009] Preferably, the ester oil is one or a mixture of trimethylolpropane ester, pentaerythritol oleate, and trimellitate.

[0010] Preferably, the thickener is one or a mixture of polymethyl methacrylate, ethylene-propylene copolymer, polybutene, polyisobutene, and polystyrene-butadiene.

[0011] Preferably, the preparation method of the modified nano-composite filler comprises the following steps:

[0012] A. Take hexagonal boron nitride and deionized water in a reactor, ultrasonically disperse them evenly, heat up to 55-70 °C, add ferric chloride hexahydrate and ferrous chloride tetrahydrate and stir evenly, then add ammonia water to adjust the pH value of the system to 10-12, and wash, filter, and dry the precipitate product to prepare nano-ferroferric oxide modified hexagonal boron nitride;

[0013] B. Take the nano-ferroferric oxide modified hexagonal boron nitride and ultrasonically disperse it in methanol, add a mixed solution of zinc nitrate hexahydrate and methanol, continue to ultrasonically disperse it evenly, then add a mixed solution of 2-methylimidazole and methanol, ultrasonically disperse it evenly and then continue to stir and react for 20-24 h. After the reaction is completed, centrifuge, wash, and dry to prepare a nano-composite filler;

[0014] C. Take the nano-composite filler and ultrasonically disperse it in methanol, add a Tris buffer solution with pH = 8.5, ultrasonically disperse it evenly, then add dopamine hydrochloride and stir and react for 20-24 h. After the reaction is completed, centrifuge, wash, and dry to prepare a dopamine-modified nano-composite filler;

[0015] D. Take the dopamine-modified nano-composite filler and ultrasonically disperse it in methanol, then add dialkyldithiophosphate and a Tris buffer solution with pH = 8.5, stir and react for 20-24 h. After the reaction is completed, centrifuge, wash, and dry to prepare a modified nano-composite filler.

[0016] Preferably, in step A, the molar ratio of ferric chloride hexahydrate to ferrous chloride tetrahydrate is 1.8 - 2.2:1.

[0017] Preferably, the preparation method of the borate ionic liquid comprises the following steps:

[0018] (1) Take N-butylimidazole and acetone in a reactor, add 3-bromopropyl methyl ether at 50 - 65°C, heat up to 70 - 85°C, and reflux for 20 - 24 h under nitrogen protection. After the reaction is completed, wash with ether, distill under reduced pressure, and dry to prepare the ionic liquid;

[0019] (2) Take salicylic acid, boric acid, lithium carbonate and deionized water in a reactor, react at 55 - 70°C for 10 - 12 h, then add the ionic liquid, stir and react for 20 - 24 h. After the reaction is completed, extract with dichloromethane, wash with deionized water again, remove the organic solvent by rotary evaporation and then dry to prepare the borate ionic liquid.

[0020] Preferably, in step (1), the molar ratio of N-butylimidazole to 3-bromopropyl methyl ether is 1:1 - 1.2.

[0021] Preferably, in step (2), the molar ratio of salicylic acid, boric acid, lithium carbonate and the ionic liquid is 4 - 4.1:2:1:2 - 2.1.

[0022] A preparation method of a high-temperature resistant lubricant for gears comprises the following steps:

[0023] S1. Weigh each component by weight, add the base oil, ester oil and thickener into a reactor, heat to 60 - 95°C, and stir and mix evenly to obtain a premix;

[0024] S2. Add the modified nano-composite filler and the borate ionic liquid to the premix, and continue to stir and mix for 0.5 - 1 h to prepare the high-temperature resistant lubricant for gears.

[0025] The beneficial effects of the present invention:

[0026] The present invention modifies magnetic nano-ferroferric oxide particles on the surface of flaky hexagonal boron nitride by means of in-situ coprecipitation reaction of ferric chloride hexahydrate and ferrous chloride tetrahydrate. The magnetic nano-ferroferric oxide particles have a large specific surface energy and surface activity, which can reduce the friction coefficient and wear scar diameter of the friction system. At the same time, the magnetic nano-ferroferric oxide particles have ferrimagnetism and can adhere to the surface of the friction pair by the magnetic force generated by the remanence effect. This adhesion helps to form a friction protection film with low shear force on the surface of the friction pair, avoiding direct contact between the friction pairs, thereby reducing friction and wear. In addition, a nano-composite filler is prepared by in-situ growth of ZIF-8 on the surface of hexagonal boron nitride by means of a chemical reaction, which can synergistically reduce the friction coefficient and wear scar diameter of the base oil, improve the load-carrying capacity of the base oil, and the prepared nano-composite filler has active corrosion inhibition performance and high-temperature resistance. Then, the nano-composite filler is surface-modified with dopamine and covalently connected with dialkyldithiophosphate. Among them, dialkyldithiophosphate is an extreme pressure and anti-wear agent. Modifying the nano-composite filler with dialkyldithiophosphate can improve the dispersion stability of the nano-composite filler in the lubricating oil, achieving excellent anti-wear and friction reduction effects. At the same time, the migration and precipitation of sulfur and phosphorus elements in dialkyldithiophosphate can be reduced, thereby greatly reducing the emissions of sulfur and phosphorus in the lubricating oil, and being more suitable for the requirements of environmental protection.

[0027] The present invention first modifies N-butylimidazole with 3-bromopropyl methyl ether to introduce an alkyl chain containing an ether group to improve its solubility in the lubricating oil, and prepares an aqueous solution of borate anions using salicylic acid, boric acid, and lithium carbonate as raw materials. Then, the ionic liquid and the aqueous solution of borate anions are mixed to prepare a borate-based ionic liquid. It does not contain S and P elements, weakens the corrosion of the lubricating oil to the equipment, and has a relatively small degree of environmental pollution. When used as a lubricating oil additive, it forms a lubricating film on the surface of the metal friction pair through a chemical reaction, thereby exerting the effects of anti-wear and friction reduction. In addition, the borate anion in the borate-based ionic liquid has a strong coordination effect with metal ions, can coordinate with copper ions to form a complex, reduce the catalytic oxidation effect of copper ions in the ester oil, and thus exhibit excellent antioxidant performance, and thus has both antioxidant performance and anti-friction and anti-wear performance. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] Example 1 A preparation method of a modified nano-composite filler includes the following steps:

[0030] A. Take 5 g of hexagonal boron nitride and 100 mL of deionized water in a reactor, ultrasonically disperse them evenly, heat up to 60 °C, add 2.7 g of ferric chloride hexahydrate and 1 g of ferrous chloride tetrahydrate, stir evenly, then add ammonia water to adjust the pH value of the system to 12. Wash, filter, and dry the precipitate product to prepare nano-ferroferric oxide modified hexagonal boron nitride.

[0031] B. Take 5 g of nano-ferroferric oxide modified hexagonal boron nitride and ultrasonically disperse it in 100 mL of methanol. Add a mixed solution of 1.8 g of zinc nitrate hexahydrate and 10 mL of methanol, continue to ultrasonically disperse evenly, then add a mixed solution of 2 g of 2-methylimidazole and 10 mL of methanol, ultrasonically disperse evenly and then continue to stir and react for 24 h. After the reaction is completed, centrifuge, wash, and dry to prepare a nano-composite filler.

[0032] C. Take 2 g of the nano-composite filler and ultrasonically disperse it in 40 mL of methanol. Add 200 mL of Tris buffer solution with pH = 8.5, ultrasonically disperse evenly, then add 2 g of dopamine hydrochloride and stir and react for 24 h. After the reaction is completed, centrifuge, wash, and dry to prepare dopamine-modified nano-composite filler.

[0033] D. Take 2 g of dopamine-modified nano-composite filler and ultrasonically disperse it in 40 mL of methanol, then add 0.5 g of dialkyldithiophosphate and 200 mL of Tris buffer solution with pH = 8.5, stir and react for 24 h. After the reaction is completed, centrifuge, wash, and dry to prepare a modified nano-composite filler.

[0034] Example 2 A preparation method of a borate-based ionic liquid includes the following steps:

[0035] (1) Take 2.6 g of N-butylimidazole and 30 mL of acetone in a reactor, place it at 60 °C, add 3.4 g of 3-bromopropyl methyl ether, heat up to 80 °C, and reflux and react for 24 h under nitrogen protection. After the reaction is completed, wash with diethyl ether, distill under reduced pressure, and dry to prepare an ionic liquid.

[0036] (2) Take 5.5 g of salicylic acid, 1.2 g of boric acid, 0.7 g of lithium carbonate and 50 mL of deionized water in a reactor, place it at 60 °C and react for 12 h, then add the obtained ionic liquid, stir and react for 24 h. After the reaction is completed, extract with dichloromethane, wash with deionized water again, rotary evaporate to remove the organic solvent and then dry to prepare a borate-based ionic liquid.

[0037] Example 3 A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 55 parts of polyalphaolefin as the base oil, 12 parts of trimethylolpropane ester as the ester oil, 7 parts of polymethyl methacrylate as the thickener, 4 parts of the modified nano-composite filler prepared in Example 1, and 2 parts of the borate ionic liquid prepared in Example 2.

[0038] The preparation method of the above high-temperature resistant lubricant for gears comprises the following steps:

[0039] S1. Weigh each component according to the parts by weight, add the base oil, ester oil and thickener into a reactor, heat to 85 °C, and stir and mix evenly to obtain a premix.

[0040] S2. Add the modified nano-composite filler and the borate ionic liquid to the premix, and continue to stir and mix for 1 h to prepare the high-temperature resistant lubricant for gears.

[0041] Example 4 A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 61 parts of polyalphaolefin as the base oil, 15 parts of pentaerythritol oleate as the ester oil, 10 parts of polyisobutene as the thickener, 6 parts of the modified nano-composite filler prepared in Example 1, and 3.5 parts of the borate ionic liquid prepared in Example 2.

[0042] The preparation method of the above high-temperature resistant lubricant for gears is the same as that of Example 3.

[0043] Example 5 A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 68 parts of polyalphaolefin as the base oil, 17 parts of trimellitate as the ester oil, 12 parts of polyisobutene as the thickener, 7.5 parts of the modified nano-composite filler prepared in Example 1, and 5 parts of the borate ionic liquid prepared in Example 2.

[0044] The preparation method of the above high-temperature resistant lubricant for gears is the same as that of Example 3.

[0045] Comparative Example 1 The preparation method of a modified nano-composite filler comprises the following steps:

[0046] A. Take 5 g of hexagonal boron nitride and ultrasonically disperse it in 100 mL of methanol. Add a mixed solution of 1.8 g of zinc nitrate hexahydrate and 10 mL of methanol, continue to ultrasonically disperse evenly, then add a mixed solution of 2 g of 2-methylimidazole and 10 mL of methanol, ultrasonically disperse evenly and then continue to stir and react for 24 h. After the reaction is completed, centrifuge, wash and dry to prepare the nano-composite filler.

[0047] B. Take 2 g of the nano-composite filler and ultrasonically disperse it in 40 mL of methanol. Add 200 mL of Tris buffer solution with pH = 8.5, ultrasonically disperse evenly, then add 2 g of dopamine hydrochloride and stir and react for 24 h. After the reaction is completed, centrifuge, wash and dry to prepare the dopamine-modified nano-composite filler.

[0048] C. Take 2 g of dopamine-modified nano-composite filler, ultrasonically disperse it in 40 mL of methanol, then add 0.5 g of dialkyldithiophosphate and 200 mL of Tris buffer solution with pH = 8.5, stir and react for 24 h. After the reaction is completed, centrifuge, wash, and dry to prepare the modified nano-composite filler.

[0049] Comparative Example 2 A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 68 parts of poly-α-olefin as the base oil, 17 parts of trimellitate as the ester oil, 12 parts of polyisobutene as the thickener, 7.5 parts of the modified nano-composite filler prepared in Comparative Example 1, and 5 parts of the borate-based ionic liquid prepared in Example 2.

[0050] The preparation method of the above high-temperature resistant lubricant for gears is the same as that in Example 3.

[0051] Comparative Example 3 A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 68 parts of poly-α-olefin as the base oil, 17 parts of trimellitate as the ester oil, 12 parts of polyisobutene as the thickener, 7.5 parts of hexagonal boron nitride, and 5 parts of the borate-based ionic liquid prepared in Example 2.

[0052] The preparation method of the above high-temperature resistant lubricant for gears is the same as that in Example 3.

[0053] Comparative Example 4 A high-temperature resistant lubricant for gears, comprising the following components in parts by weight: 68 parts of poly-α-olefin as the base oil, 17 parts of trimellitate as the ester oil, 12 parts of polyisobutene as the thickener, 7.5 parts of the modified nano-composite filler prepared in Example 1, and 5 parts of the ionic liquid prepared in Example 2.

[0054] The preparation method of the above high-temperature resistant lubricant for gears is the same as that in Example 3.

[0055] Performance testing

[0056] Perform performance testing on the high-temperature resistant lubricants for gears prepared in Examples 3 - 5 and Comparative Examples 2 - 4:

[0057] (1) Tribological performance test: According to GB / T 3142-2019, test the maximum non-seizure load (PB value) of the oil sample on a four-ball friction and wear tester to evaluate the extreme pressure performance; use an MM-W1A vertical universal friction and wear tester to test the anti-wear and friction-reducing performance of the oil sample. Test conditions: different loads (100, 200, 400 N), rotation speed 1200 r / min, room temperature, time 30 min; use a scanning electron microscope to characterize the surface morphology of the wear scar, observe the wear scar morphology under the conditions of load 400 N, rotation speed 1200 r / min, room temperature, and time 30 min, and obtain the data results as shown in Table 1.

[0058] (2) Oxidation stability test: The antioxidant performance of the oil sample was evaluated using SH / T 0193. The test conditions were 150 °C and a rotation speed of 100 r / min. When the oxygen pressure in the oxygen bomb decreased from the highest stable value to 175 kPa, the measured time recorded was the oxidation induction period. By comparing the oxidation induction periods, the antioxidant performance of the oil sample could be evaluated, and the data results are shown in Table 1.

[0059] Table 1 Detection Results of Sample Performance

[0060]

[0061] As can be seen from the data in Table 1, the lubricants prepared in Examples 3-5 of the present invention have excellent anti-friction and anti-wear performance and antioxidant performance. Among them, in Comparative Example 2, the surface of hexagonal boron nitride in the modified nano-composite filler added was not modified with magnetic nano-ferroferric oxide particles. In Comparative Example 3, the modified nano-composite filler was replaced with hexagonal boron nitride in equal amounts. The measured friction coefficient, wear scar diameter, and maximum non-seizure load of Comparative Examples 2-3 were lower than those of Examples 3-5, indicating that the modification of magnetic nano-ferroferric oxide particles and ZIF-8 can synergistically improve the anti-wear and anti-friction effects of the lubricant. In Comparative Example 4, the ionic liquid was not modified, and the measured anti-wear, anti-friction performance, and antioxidant performance of the lubricant were lower than those of Examples 3-5. The reason is that the introduction of borate anions improved the anti-wear, anti-friction performance, and antioxidant performance of the lubricant to a certain extent.

[0062] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A temperature-resistant lubricant for gears, characterized in that: The invention comprises the following components by weight: 50 to 70 parts of base oil, 10 to 20 parts of ester oil, 5 to 15 parts of tackifier, 3 to 8 parts of modified nano composite filler, and 2 to 5 parts of borate ester ionic liquid; The modified nano composite filler is prepared by using hexagonal boron nitride as a carrier, modifying magnetic nano ferroferric oxide particles and ZIF-8 nano particles on its surface, and then using dopamine for surface modification and covalently linking dialkyl dithiophosphate; the borate ester ionic liquid is prepared by using 3-bromopropyl methyl ether to modify N-butyl imidazole to obtain an ionic liquid, and then reacting salicylic acid, boric acid and lithium carbonate and mixing them with the ionic liquid for reaction.

2. The temperature-resistant lubricant for gears according to claim 1, characterized in that: The base oil is one or a mixture of synthetic hydrocarbon oil, silicone oil, alkylbenzene, oil-soluble polyether and synthetic ester oil.

3. The temperature-resistant lubricant for gears according to claim 1, characterized in that: The ester oil is one or a mixture of trimethylolpropane ester, pentaerythritol oleate, and trimellitate.

4. The temperature-resistant lubricant for gears according to claim 1, characterized in that: The tackifier is one or a mixture of polymethyl methacrylate, ethylene propylene copolymer, polybutylene, polyisobutylene, and polystyrene-butadiene.

5. The temperature-resistant lubricant for gears according to claim 1, characterized in that: The preparation method of the modified nanocomposite filler comprises the following steps: A. Put hexagonal boron nitride and deionized water in a reactor, disperse them uniformly with ultrasonic, heat to 55-70°C, add ferric chloride hexahydrate and ferrous chloride tetrahydrate and stir them uniformly, then add ammonia water to adjust the pH value of the system to 10-12, wash, filter and dry the precipitated product to prepare nano-ferroferric oxide modified hexagonal boron nitride; B. Ultrasonic dispersion of nano-ferroferric oxide-modified hexagonal boron nitride in methanol, adding a mixed solution of zinc nitrate hexahydrate and methanol, and continuing to ultrasonically disperse evenly, then adding a mixed solution of 2-methylimidazole and methanol, and stirring and reacting for 20 to 24 hours after ultrasonic dispersion. After the reaction is completed, the nano-composite filler is prepared by centrifugation, washing, and drying; C. Ultrasonic dispersion of the nanocomposite filler in methanol, adding a Tris buffer solution with a pH value of 8.5, ultrasonically dispersing the nanocomposite filler uniformly, then adding dopamine hydrochloride and stirring to react for 20 to 24 hours. After the reaction is completed, the nanocomposite filler is centrifuged, washed, and dried to prepare a dopamine-modified nanocomposite filler; D. Ultrasonic dispersion of dopamine-modified nanocomposite filler in methanol, then adding dialkyl dithiophosphate and Tris buffer solution with pH=8.5, stirring and reacting for 20-24 hours. After the reaction is completed, centrifugation, washing and drying are performed to prepare modified nanocomposite filler.

6. The temperature-resistant lubricant for gears according to claim 5, characterized in that: In the step A, the molar ratio of ferric chloride hexahydrate to ferrous chloride tetrahydrate is 1.8-2.2:

1.

7. The temperature-resistant lubricant for gears according to claim 1, characterized in that: The preparation method of the borate ester ionic liquid comprises the following steps: (1) N-butyl imidazole and acetone are placed in a reactor, 3-bromopropyl methyl ether is added at 50-65° C., the temperature is raised to 70-85° C., and refluxed for 20-24 hours under nitrogen protection. After the reaction is completed, the ionic liquid is washed with ether, distilled under reduced pressure, and dried to prepare the ionic liquid; (2) Salicylic acid, boric acid, lithium carbonate and deionized water are placed in a reactor, reacted at 55-70° C. for 10-12 hours, and then an ionic liquid is added and stirred for 20-24 hours. After the reaction is completed, the mixture is extracted with dichloromethane, washed with deionized water, and the organic solvent is removed by rotary evaporation and dried to prepare a borate ester ionic liquid.

8. The temperature-resistant lubricant for gears according to claim 7, characterized in that: In the step (1), the molar ratio of N-butyl imidazole to 3-bromopropyl methyl ether is 1:1 to 1.

2.

9. The temperature-resistant lubricant for gears according to claim 7, characterized in that: In the step (2), the molar ratio of salicylic acid, boric acid, lithium carbonate and ionic liquid is 4-4.1:2:1:2-2.

1.

10. A method for preparing a temperature-resistant lubricant for gears according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Weigh each component by weight, add the base oil, ester oil and tackifier into a reactor, heat to 60-95° C., stir and mix evenly to obtain a premix; S2. Add the modified nanocomposite filler and the borate ionic liquid to the premix, and continue stirring and mixing for 0.5 to 1 hour to prepare a temperature-resistant lubricant for gears.

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