Military high-power heavy vehicle diesel engine oil and production process thereof

Abstract

The invention discloses diesel engine oil for military high-power heavy vehicles and a production process thereof, and relates to the technical field of mechanical equipment, and the diesel engine oil comprises the following raw materials in percentage by mass: 74-84% of base oil and 13-18% of an additive, 3-8% of a viscosity index improver; the additive is prepared from the following raw materials in parts by weight: 0.3-1 part of an anti-wear reagent at extreme pressure, 8-10.1 parts of a purification dispersant, 1.7-1.9 parts of a nano additive and 3-5 parts of a pour point depressant; the purification dispersant is amine modified polyisobutylene succinate; the nano additive comprises nano cerium oxide and nitrogen-containing heterocyclic borate, and the mass ratio of the nano cerium oxide to the nitrogen-containing heterocyclic borate is (0.7-0.9): 1. The diesel engine oil for the military high-power heavy vehicle provided by the invention has excellent low-temperature startability, high-temperature stability, detergency and dispersibility and wear-resistant lubricity.

Description

Technical Field

[0001] This application relates to the field of mechanical equipment technology, and particularly to a military high-power heavy vehicle diesel engine oil and its production process. Background Art

[0002] Military fuels mainly include fuel oils such as gasoline, diesel, and jet fuel, as well as lubricating oils and greases. Military diesel engine oil is mainly used in high-power heavy vehicles such as tanks, armored vehicles, and submarines. The quality of military diesel engine oil is of great significance for exerting the tactical and technical performance of military equipment and extending the service life of machinery.

[0003] Due to the extremely special and complex operating environment of military high-power heavy vehicles, they often operate under various extreme natural conditions such as high temperature, low temperature, high altitude, desert, and swamp. It is precisely in this extreme operating environment that the high-temperature stability problem of military high-power heavy vehicles has gradually emerged. Since the engine generates a large amount of heat during high-load operation, and the high-temperature environment exacerbates the difficulty of heat dissipation, resulting in the engine temperature being too high, which in turn affects its normal operation and performance. Operating in a high-temperature environment for a long time may also accelerate the wear and aging of engine components and shorten the service life of the vehicle.

[0004] Therefore, it is urgent to seek effective solutions to improve the stability of military high-power heavy vehicle diesel engine oil in high-temperature environments. Summary of the Invention

[0005] In order to further improve the high-temperature stability of military high-power heavy vehicle diesel engine oil, this application provides a military high-power heavy vehicle diesel engine oil and its production process.

[0006] A military high-power heavy vehicle diesel engine oil provided by this application adopts the following technical solutions:

[0007] A military high-power heavy vehicle diesel engine oil, the materials include, by mass percentage, 74 - 84% of base oil, 13 - 18% of additives; 3 - 8% of viscosity index improver;

[0008] The additives are composed of the following raw materials: 0.3 - 1 part of extreme pressure and anti-wear agent, 8 - 10.1 parts of detergent-dispersant, 1.7 - 1.9 parts of nano-additive, 3 - 5 parts of pour point depressant;

[0009] The detergent-dispersant is amine-modified polyisobutylene succinate; the nano-additive includes nano-ceria and nitrogen-containing heterocyclic borate ester, and the mass ratio of the two is 0.7 - 0.9:1.

[0010] Preferably, the raw materials of the military high-power heavy vehicle diesel engine oil include, by mass percentage, 79% of base oil, 16% of additives; 5% of viscosity index improver.

[0011] Preferably, the base oil comprises 40-50% of 250N type III paraffinic synthetic oil, 30-40% of 150N type III paraffinic synthetic oil, and the balance is alkylnaphthalene.

[0012] Preferably, the viscosity index improver is an HSD viscosity index improver.

[0013] Preferably, the viscosity index improver is an HSD viscosity index improver.

[0014] Preferably, the amine-modified polyisobutylene succinate is prepared from the following raw materials: polyisobutylene succinic anhydride, polyglycerol, and N-aminoethylpiperazine; the molar ratio of polyisobutylene succinic anhydride, polyglycerol, and N-aminoethylpiperazine is 1:0.9-1.1:0.6-1.6.

[0015] Preferably, the preparation method of the amine-modified polyisobutylene succinate comprises the following steps:

[0016] S1. Adding polyisobutylene succinic anhydride and polyglycerol into a reactor, reacting at 160-200°C for 9-11 h under nitrogen protection to obtain polyisobutylene succinate;

[0017] S2. Adding N-aminoethylpiperazine to the polyisobutylene succinate obtained in S1, and reacting at 140-180°C for 6-10 h under nitrogen protection to obtain the amine-modified polyisobutylene succinate.

[0018] Preferably, the nitrogen-containing heterocyclic borate ester is prepared from the following raw materials in parts by weight: 17.7-26.7 parts of benzotriazole, 24.5-36.7 parts of formaldehyde, 30-45 parts of distilled water, 2.5-3.8 parts of boric acid, 15-22.5 parts of dodecanol, and 26-43 parts of toluene.

[0019] Preferably, the preparation method of the nitrogen-containing heterocyclic borate ester comprises the following steps:

[0020] S1. Continuously stirring benzotriazole, formaldehyde, and distilled water at room temperature to fully mix the three; then heating and stirring at 75-85°C for 30-40 min to obtain the intermediate product 1-hydroxymethylbenzotriazole;

[0021] S2. Adding boric acid and dodecanol to 1-hydroxymethylbenzotriazole; adding toluene as a dehydrating agent, heating and refluxing and stirring the reactants at 110-120°C, stopping the reaction after 3-4 h, and cooling to obtain the nitrogen-containing heterocyclic borate ester.

[0022] The production process of a military high-power heavy vehicle diesel engine oil provided by this application adopts the following technical solution:

[0023] A production process of a military high-power heavy vehicle diesel engine oil comprises the following steps:

[0024] S1. Prepare materials according to the mass percentages of each raw material;

[0025] S2. Put the base oil into the blending kettle, stir, and heat to 50 - 60 °C. After stirring for 60 - 80 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0026] S3. Then put the additives and viscosity index improvers into the blending kettle and mix and stir well for 5 - 6 h to obtain the finished product.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Using polyisobutenyl succinic anhydride and polyglycerol as raw materials, polyisobutenyl succinate is synthesized, and then polyisobutenyl succinate is modified by N - aminoethyl piperazine. N - aminoethyl piperazine is a cyclic amine with a unique structure and reaction activity, which effectively improves the stability of diesel engine oil at high temperatures; at the same time, it can also effectively disperse pollutants and sediments in diesel engine oil, prevent them from forming deposits on the metal surface, and improve its detergency and dispersibility.

[0029] 2. The nitrogen - containing heterocyclic borate ester has good biodegradability, better antioxidant and corrosion - resistant capabilities, and excellent anti - friction and anti - wear capabilities. The compounding of the nitrogen - containing heterocyclic borate ester and nano - cerium oxide for use in diesel engine oil can further significantly improve the anti - friction and anti - wear performance of diesel engine oil; at the same time, it can also effectively improve the high - and low - temperature stability of diesel engine oil, reduce the equipment temperature, and extend the equipment life. Specific Embodiments

[0030] The following further elaborates on the present application with reference to embodiments.

[0031] Preparation Example 1 Preparation of Amine - Modified Polyisobutenyl Succinate

[0032] Preparation Example 1.1

[0033] S1. Add 100 g of polyisobutenyl succinic anhydride and 21.6 g of triglycerol to the reactor, and react at 160 °C for 9 h under nitrogen protection to obtain polyisobutenyl succinate;

[0034] S2. Add 7.8 g of N - aminoethyl piperazine to the polyisobutenyl succinate obtained in S1, and react at 140 °C for 6 h under nitrogen protection to obtain amine - modified polyisobutenyl succinate.

[0035] Preparation Example 1.2

[0036] S1. Add 100 g of polyisobutenyl succinic anhydride and 24 g of triglycerol to the reactor, and react at 180 °C for 10 h under nitrogen protection to obtain polyisobutenyl succinate;

[0037] S2. Add 12.9 g of N-aminoethylpiperazine to the polyisobutenyl succinic ester obtained in S1, and react at 160 °C for 8 h under nitrogen protection to obtain the amine-modified polyisobutenyl succinic ester.

[0038] Preparation Example 1.3

[0039] S1. Add 100 g of polyisobutenyl succinic anhydride and 26.4 g of triglycerol to a reactor, and react at 200 °C for 11 h under nitrogen protection to obtain polyisobutenyl succinic ester;

[0040] S2. Add 18.1 g of N-aminoethylpiperazine to the polyisobutenyl succinic ester obtained in S1, and react at 180 °C for 10 h under nitrogen protection to obtain the amine-modified polyisobutenyl succinic ester.

[0041] Preparation Example 2 Preparation of nitrogen-containing heterocyclic borate

[0042] Preparation Example 2.1

[0043] S1. Continuously stir 17.7 g of benzotriazole, 24.5 g of formaldehyde and 30 g of distilled water at room temperature to fully mix the three; then heat and stir at 75 °C for 30 min; obtain the intermediate 1-hydroxymethylbenzotriazole;

[0044] S2. Add 2.5 g of boric acid and 15 g of dodecanol to 1-hydroxymethylbenzotriazole; add 26 g of toluene as a dehydrating agent, heat and reflux and stir the reactants at 110 °C, stop the reaction after 3 h, and cool to obtain the nitrogen-containing heterocyclic borate.

[0045] Preparation Example 2.2

[0046] S1. Continuously stir 22.2 g of benzotriazole, 30.6 g of formaldehyde and 37.5 g of distilled water at room temperature to fully mix the three; then heat and stir at 80 °C for 35 min; obtain the intermediate 1-hydroxymethylbenzotriazole;

[0047] S2. Add 3.15 g of boric acid and 18.8 g of dodecanol to 1-hydroxymethylbenzotriazole; add 34.5 g of toluene as a dehydrating agent, heat and reflux and stir the reactants at 115 °C, stop the reaction after 3.5 h, and cool to obtain the nitrogen-containing heterocyclic borate.

[0048] Preparation Example 2.3

[0049] S1. Continuously stir 26.7 g of benzotriazole, 36.7 g of formaldehyde and 30 g of distilled water at room temperature to fully mix the three; then heat and stir at 85 °C for 40 min; obtain the intermediate 1-hydroxymethylbenzotriazole;

[0050] S2. Add 2.5 g of boric acid and 15 g of dodecanol to 1-hydroxymethylbenzotriazole; add 26 g of toluene as a dehydrating agent, heat and reflux the reactants with stirring at 120 °C, stop the reaction after 4 h, and cool to obtain a nitrogen-containing heterocyclic borate ester.

[0051] Example 1

[0052] S1. A military high-power heavy vehicle diesel engine oil, comprising 74 g of base oil, 18 g of additives; 8 g of viscosity index improver HSD; the base oil used in this example comprises 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio; the additives used are composed of the following raw materials: 1 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 10.1 g of detergency and dispersant prepared in Preparation Example 1.1, 1.9 g of nano-additive, 5 g of pour point depressant polymethacrylate; the nano-additive comprises nano-ceria and a nitrogen-containing heterocyclic borate ester prepared in Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0053] S2. Put the base oil into a blending kettle, stir, and heat to 50 °C. After stirring for 60 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0054] S3. Then put the additives and the viscosity index improver into the blending kettle and mix and stir well for 5 h to obtain the finished product.

[0055] Example 2

[0056] S1. A military high-power heavy vehicle diesel engine oil, comprising 74 g of base oil, 18 g of additives; 8 g of viscosity index improver HSD; the base oil used in this example comprises 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio; the additives used are composed of the following raw materials: 1 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 10.1 g of detergency and dispersant prepared in Preparation Example 1.1, 1.9 g of nano-additive, 5 g of pour point depressant polymethacrylate; the nano-additive comprises nano-ceria and a nitrogen-containing heterocyclic borate ester prepared in Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0057] S2. Put the base oil into a blending kettle, stir, and heat to 55 °C. After stirring for 70 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0058] S3. Then put the additives and the viscosity index improver into the blending kettle and mix and stir well for 5.5 h to obtain the finished product.

[0059] Example 3

[0060] S1. A diesel engine oil for military high-power heavy vehicles, comprising 74 g of base oil, 18 g of additives; 8 g of viscosity index improver HSD; in this embodiment, the base oil used comprises 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio; the additives used are composed of the following raw materials: 1 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 10.1 g of detergent-dispersant prepared from Preparation Example 1.1, 1.9 g of nano-additive, 5 g of pour point depressant polymethacrylate; the nano-additive comprises nano-ceria and nitrogen-containing heterocyclic borate prepared from Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0061] S2. Put the base oil into a blending kettle, stir, and heat to 60 °C. After stirring for 80 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0062] S3. Then put the additives and the viscosity index improver into the blending kettle, and mix and stir well for 6 h to obtain the finished product.

[0063] Example 4

[0064] S1. A diesel engine oil for military high-power heavy vehicles, comprising 79 g of base oil, 16 g of additives; 5 g of viscosity index improver HSD; in this embodiment, the base oil used comprises 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio; the additives used are composed of the following raw materials: 0.6 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 9.6 g of detergent-dispersant prepared from Preparation Example 1.1, 1.8 g of nano-additive, 4 g of pour point depressant polymethacrylate; the nano-additive comprises nano-ceria and nitrogen-containing heterocyclic borate prepared from Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0065] S2. Put the base oil into a blending kettle, stir, and heat to 50 °C. After stirring for 60 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0066] S3. Then put the additives and the viscosity index improver into the blending kettle, and mix and stir well for 5 h to obtain the finished product.

[0067] Example 5

[0068] S1. A military heavy-duty vehicle diesel engine oil, comprising 84 g of base oil, 13 g of additives; 3 g of viscosity index improver HSD; in this embodiment, the base oil used comprises 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkyl naphthalene by mass ratio; the additives used are composed of the following raw materials: 0.3 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 8 g of detergent-dispersant prepared in Preparation Example 1.1, 1.7 g of nano-additive, and 3 g of pour point depressant polymethacrylate; the nano-additive comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0069] S2. Put the base oil into a blending kettle, stir, and heat to 50 °C. After stirring for 60 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0070] S3. Then put the additives and the viscosity index improver into the blending kettle and mix and stir well for 5 h to obtain the finished product.

[0071] Example 6

[0072] The difference between Example 6 and Example 1 is that the detergent-dispersant used in Example 6 is prepared by the method of Preparation Example 1.2.

[0073] Example 7

[0074] The difference between Example 7 and Example 1 is that the detergent-dispersant used in Example 7 is prepared by the method of Preparation Example 1.3.

[0075] Example 8

[0076] The difference between Example 8 and Example 1 is that the nano-additive used in Example 8 comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.1, and the mass ratio of the two is 0.8:1.

[0077] Example 9

[0078] The difference between Example 9 and Example 1 is that the nano-additive used in Example 9 comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.1, and the mass ratio of the two is 0.9:1.

[0079] Example 10

[0080] The difference between Example 10 and Example 1 is that the nano-additive used in Example 10 comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.2, and the mass ratio of the two is 0.7:1.

[0081] Example 11

[0082] Example 11 is different from Example 1 in that the nano-additives used in Example 11 include nano-ceria and the nitrogen-containing heterocyclic borate ester prepared in Preparation Example 2.3, and the mass ratio of the two is 0.7:1.

[0083] Example 12

[0084] Example 12 is different from Example 1 in that the base oil used in Example 12 includes 45% of 250N type III paraffinic synthetic oil, 35% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio.

[0085] Example 13

[0086] Example 13 is different from Example 1 in that the base oil used in Example 13 includes 50% of 250N type III paraffinic synthetic oil, 30% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio.

[0087] Comparative Example 1

[0088] S1. A military heavy-duty vehicle diesel engine oil includes 69 g of base oil, 20 g of additives; 11 g of viscosity index improver HSD; the base oil used in this example includes 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio; the additives used are composed of the following raw materials: 1.3 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 10.7 g of detergent-dispersant prepared in Preparation Example 1.1, 2 g of nano-additives, and 6 g of pour point depressant polymethacrylate; the nano-additives include nano-ceria and the nitrogen-containing heterocyclic borate ester prepared in Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0089] S2. Put the base oil into a blending kettle, stir, and heat to 50 °C. After stirring for 60 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0090] S3. Then put the additives and the viscosity index improver into the blending kettle and mix and stir thoroughly for 5 h to obtain the finished product.

[0091] Comparative Example 2

[0092] S1. A military heavy-duty vehicle diesel engine oil, comprising 89 g of base oil, 10 g of additives; 1 g of viscosity index improver HSD; in this embodiment, the base oil used comprises 40% of 250N type III paraffinic synthetic oil, 40% of 150N type III paraffinic synthetic oil, and 20% of alkylnaphthalene by mass ratio; the additives used are composed of the following raw materials: 0.1 g of extreme pressure and anti-wear agent thiophosphoric acid acrylate, 6.3 g of detergents and dispersants prepared in Preparation Example 1.1, 1.6 g of nano-additive, and 2 g of pour point depressant polymethacrylate; the nano-additive comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.1, and the mass ratio of the two is 0.7:1;

[0093] S2. Put the base oil into a blending kettle, stir, and heat to 50 °C. After stirring for 60 min, measure its physical and chemical indexes, and adjust the base oil according to the measurement results;

[0094] S3. Then put the additives and the viscosity index improver into the blending kettle and mix and stir thoroughly for 5 h to obtain the finished product.

[0095] Comparative Example 3

[0096] The difference between Comparative Example 3 and Example 1 is that the nano-additive used in Comparative Example 3 comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.1, and the mass ratio of the two is 0.6:1.

[0097] Comparative Example 4

[0098] The difference between Comparative Example 4 and Example 1 is that the nano-additive used in Comparative Example 4 comprises nano-ceria and nitrogen-containing heterocyclic borate prepared in Preparation Example 2.1, and the mass ratio of the two is 1:1.

[0099] Comparative Example 5

[0100] The difference between Comparative Example 5 and Example 1 is that the detergents and dispersants used in Comparative Example 5 are polyisobutylene succinic anhydride.

[0101] Comparative Example 6

[0102] The difference between Comparative Example 6 and Example 1 is that the nano-additive used in Comparative Example 6 only comprises nano-ceria.

[0103] Performance detection test

[0104] I. Use GB / T 265-1988 "Determination Method of Kinematic Viscosity and Calculation Method of Dynamic Viscosity of Petroleum Products" to detect the high-temperature kinematic viscosity and low-temperature starting viscosity of the diesel engine oils obtained in Examples 1-13 and Comparative Examples 1-6, and the results are shown in Table 1.

[0105] II. The high-temperature high-shear viscosity of the diesel engine oils obtained in Examples 1-13 and Comparative Examples 1-6 was detected using SH / T 0703-2001 Determination of Apparent Viscosity of Lubricating Oils at High Temperature and High Shear Rate (Multi-capillary Viscometer Method). The results are shown in Table 1.

[0106] III. The friction coefficients of the diesel engine oils obtained in Examples 1-13 and Comparative Examples 1-6 were detected using SH / T 0762-2005 Determination of Friction Coefficient of Lubricating Oils (Four-ball Method). The results are shown in Table 1. The specific detection results are as follows:

[0107] Table 1 Performance Detection Results

[0108]

[0109]

[0110] From the detection results in Table 1, a diesel engine oil for military high-power heavy vehicles and its production process provided by this application have appropriate high-temperature kinematic viscosity, low-temperature starting viscosity, good high-temperature detergency, and lubrication and anti-friction properties.

[0111] This specific embodiment is only an interpretation of this application and does not limit this application. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A military high-power heavy-duty vehicle diesel engine oil, characterized in that: The raw materials include 74-84% base oil, 13-18% additives, and 3-8% viscosity modifier by mass percentage; The additive is composed of the following raw materials: 0.3-1 parts of extreme pressure anti-wear agent, 8-10.1 parts of detergent dispersant, 1.7-1.9 parts of nano additive, and 3-5 parts of pour point depressant; The cleaning dispersant is amine-modified polyisobutylene succinate; the nano additive comprises nano cerium oxide and nitrogen-containing heterocyclic borate, and the mass ratio of the two is 0.7-0.9:

1.

2. A military high-power heavy-duty vehicle diesel engine oil according to claim 1, characterized in that: The raw material of the military high-power heavy-duty vehicle diesel engine oil comprises 79% of base oil, 16% of additives and 5% of viscosity modifier by mass percentage.

3. A military high-power heavy-duty vehicle diesel engine oil according to claim 1 or 2, characterized in that: The base oil comprises 40-50% of 250NⅢ type paraffin-based synthetic oil, 30-40% of 150NⅢ type paraffin-based synthetic oil, and the balance is alkyl naphthalene.

4. A military high-power heavy-duty vehicle diesel engine oil according to claim 1 or 2, characterized in that: The viscosity modifier is a HSD viscosity modifier.

5. A military high-power heavy-duty vehicle diesel engine oil according to claim 1, characterized in that: The extreme pressure anti-wear agent is thiophosphate acrylate.

6. A military high-power heavy-duty vehicle diesel engine oil according to claim 1, characterized in that: The amine-modified polyisobutylene succinate is prepared from the following raw materials: polyisobutylene succinic anhydride, polyglycerol, and N-aminoethyl piperazine; the molar ratio of the polyisobutylene succinic anhydride, polyglycerol, and N-aminoethyl piperazine is 1:0.9-1.1:0.6-1.

6.

7. A military high-power heavy-duty vehicle diesel engine oil according to claim 6, characterized in that: The preparation method of the amine-modified polyisobutylene succinate comprises the following steps: S1. Add polyisobutylene succinic anhydride and polyglycerol to a reactor and react at 160-200 ° C for 9-11 hours under nitrogen protection to obtain polyisobutylene succinate; S2. Add N-aminoethylpiperazine to the polyisobutylene succinate obtained in S1, and react at 140-180° C. for 6-10 hours under nitrogen protection to obtain amine-modified polyisobutylene succinate.

8. A military high-power heavy-duty vehicle diesel engine oil according to claim 1, characterized in that: The nitrogen-containing heterocyclic boric acid ester is prepared from the following raw materials in parts by weight: 17.7-26.7 parts of benzotriazole, 24.5-36.7 parts of formaldehyde, 30-45 parts of distilled water, 2.5-3.8 parts of boric acid, 15-22.5 parts of dodecanol, and 26-43 parts of toluene.

9. A military high-power heavy-duty vehicle diesel engine oil according to claim 8, characterized in that: The preparation method of the nitrogen-containing heterocyclic boric acid ester comprises the following steps: S1. Stir benzotriazole, formaldehyde and distilled water at room temperature to mix them thoroughly; then heat and stir at 75-85°C for 30-40 minutes to obtain the intermediate product 1-hydroxymethylbenzotriazole; S2. Add boric acid and dodecanol to 1-hydroxymethylbenzotriazole; add toluene as a dehydrating agent, heat and reflux the reactants at 110-120° C., stir, and stop the reaction after 3-4 hours of reaction. After cooling, obtain a nitrogen-containing heterocyclic borate ester.

10. A production process for a military high-power heavy-duty vehicle diesel engine oil according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Prepare materials according to the mass percentage of each raw material; S2. Put the base oil into the mixing kettle, stir, and heat to 50-60 ° C. After stirring for 60-80 minutes, measure its physical and chemical indicators and adjust the base oil according to the measurement results; S3. Then put the additives and viscosity modifier into the mixing kettle, mix and stir thoroughly for 5-6 hours to obtain the finished product.

Images