Nanoscale mineral molybdenum disulfide lubricating oil and application thereof in low-rotating-speed and large-torque engine

Abstract

The invention relates to nanoscale mineral molybdenum disulfide lubricating oil. The lubricating oil comprises the following components in parts by weight: 100 parts of base oil; 5-10 parts by weight of nanoscale mineral molybdenum disulfide and 0.1-0.5 part by weight of molybdenum disulfide nanosheet loaded boron nitride; the lubricating oil is prepared from the following components in parts by weight: 0.2 to 2 parts of succinimide, 1 to 5 parts of a viscosity index improver, 0.2 to 2 parts of a pour point depressant, 0.1 to 1.5 parts of an antioxidant and 0.1 to 0.3 part of an anti-wear agent. The lubricating oil can be applied to low-rotating-speed and large-torque engines.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil technology, specifically to a nano-grade mineral molybdenum disulfide lubricating oil and its application in low-speed, high-torque engines. Background Technology

[0002] When a vehicle is carrying a heavy load uphill, the engine operates at low speed and high torque. The metal friction pairs are under low speed and high load conditions. The lubricating oil film of traditional lubricating oil is passively squeezed and cut, resulting in direct contact between the friction pairs and increased wear.

[0003] Existing technologies offer less than ideal solutions for lubricating low-speed, high-torque engines. Summary of the Invention

[0004] To address the above problems, the present invention provides a nano-grade mineral molybdenum disulfide lubricating oil, the lubricating oil comprising the following components:

[0005] 100 parts by weight of base oil;

[0006] 5-10 parts by weight of nano-sized molybdenum disulfide mineral.

[0007] Molybdenum disulfide nanosheets loaded with boron nitride, 0.1-0.5 parts by weight;

[0008] Detergent dispersant: 0.2-2 parts by weight of succinimide.

[0009] Viscosity index improver: 1-5 parts by weight of styrene-isoprene copolymer.

[0010] Pour point depressant: 0.2-2 parts by weight of polymethacrylate,

[0011] Antioxidant: 0.1–1.5 parts by weight of diisooctyl diphenylamine

[0012] Anti-wear agent: 0.1-0.3 parts by weight.

[0013] The base oil has a kinematic viscosity of 2.0 m at 100°C. 2 / s or higher and 4.3.m 2 Lubricating oil base oil with a speed of less than / s

[0014] As a preferred technical solution, the viscosity index improver is selected from one or more of ethylene-propylene copolymer, styrene-isoprene copolymer, hydrogenated styrene-isoprene block copolymer, and polyisobutylene.

[0015] As a preferred technical solution, the pour point depressant is selected from one or more of the following: fumarate pour point depressants, alkylnaphthalene pour point depressants, polymethyl methacrylate pour point depressants, and polyolefin pour point depressants.

[0016] As a preferred technical solution, the antioxidant is selected from one or more of 2,6-di-tert-butylphenol, diisooctyl diphenylamine, N-phenyl-N-sec-butyl-p-phenylenediamine, and 4-octyl-N-(4-octylphenyl)aniline.

[0017] As a preferred technical solution, the particle size of the nano-sized mineral molybdenum disulfide is 80-600 nm.

[0018] As a preferred technical solution, the preparation method includes the following steps:

[0019] 1. Pump the hydrotreated base oil into the blending vessel through a filter pump while gradually heating it; add polyisobutylene and stir for 15-20 minutes until homogeneous;

[0020] 2. Add other additives, and keep the temperature maintained at the beginning while stirring for 30-45 minutes until the mixture is homogeneous and completely dissolved.

[0021] 3. Add the nano-sized molybdenum disulfide main agent to the mixing vessel in sequence, turn on pulse mixing, heat at the same time, mix to a certain temperature, and stir evenly;

[0022] 4. Pulse mix for 40-60 minutes until the mixture is homogeneous and blending is complete.

[0023] This invention also relates to the application of the aforementioned nano-grade mineral molybdenum disulfide lubricating oil in low-speed, high-torque engines.

[0024] This invention enables the molybdenum film to have extremely strong extreme pressure anti-shear and wear capabilities, and the molybdenum disulfide can be effectively retained, thus maintaining good lubrication performance even when the oil film breaks down. This significantly improves engine performance under low speed and high torque conditions and solves the problem of mechanical damage caused by low speed and high torque.

[0025] The present invention will be described in detail below through embodiments, which are not intended to limit the present invention in any way. Detailed Implementation

[0026] The present invention will be described in detail below with reference to embodiments, but this does not imply any adverse limitation on the invention. The present invention has been described in detail, and specific embodiments thereof have been disclosed. It will be apparent to those skilled in the art that various changes and modifications can be made to the specific embodiments of the present invention without departing from the spirit and scope thereof. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product specification.

[0027] A nano-grade mineral molybdenum disulfide lubricating oil, the lubricating oil comprising the following components:

[0028] 100 parts by weight of base oil;

[0029] 5-10 parts by weight of nano-sized molybdenum disulfide mineral.

[0030] Molybdenum disulfide nanosheets loaded with boron nitride, 0.1-0.5 parts by weight;

[0031] Detergent dispersant: 0.2-2 parts by weight of succinimide.

[0032] Viscosity index improver: 1-5 parts by weight of styrene-isoprene copolymer.

[0033] Pour point depressant: 0.2-2 parts by weight of polymethacrylate,

[0034] Antioxidant: 0.1–1.5 parts by weight of diisooctyl diphenylamine

[0035] Anti-wear agent: 0.1-0.3 parts by weight.

[0036] In a preferred embodiment, the nanoscale mineral molybdenum disulfide has a particle size of 80-600 nm.

[0037] As a preferred embodiment, the preparation method includes the following steps:

[0038] 1. Pump the hydrotreated base oil into the blending vessel through a filter pump while gradually heating it; add polyisobutylene and stir for 15-20 minutes until homogeneous;

[0039] 2. Add other additives, and keep the temperature maintained at the beginning while stirring for 30-45 minutes until the mixture is homogeneous and completely dissolved.

[0040] 3. Add the nano-sized molybdenum disulfide mineral main agent to the mixing vessel in sequence, turn on pulse mixing, heat at the same time, mix to a certain temperature, and stir evenly.

[0041] 4. Pulse mix for 40-60 minutes until the mixture is homogeneous and blending is complete.

[0042] This invention also relates to the application of the aforementioned nano-grade mineral molybdenum disulfide lubricating oil in low-speed, high-torque engines.

[0043] Nanoscale molybdenum disulfide mineral: 100 nanometers in flake form, Henan Yongfeng Molybdenum Co., Ltd.

[0044] Molybdenum disulfide nanosheets loaded with boron nitride were purchased from Shanghai Chaowei Nanotechnology Co., Ltd.

[0045] All other materials were purchased from the market.

[0046] Example 1

[0047] 100 parts by weight of base oil (the mass ratio of hydrotreated base oil 150N to hydrotreated base oil 500N is 1:1);

[0048] Six parts by weight of nano-sized molybdenum disulfide mineral.

[0049] 0.4 parts by weight of boron nitride supported on molybdenum disulfide nanosheets;

[0050] Detergent dispersant: 1 part by weight of succinimide

[0051] Viscosity index improver: 2 parts by weight of styrene-isoprene copolymer

[0052] Pour point depressant: 1 part by weight of polymethyl methacrylate,

[0053] Antioxidant: 1 part by weight of diisooctyl diphenylamine

[0054] Anti-wear agent: 0.2 parts by weight (barium petroleum sulfonate 0.02, triethanolamine oleate 0.03, tributyl phosphate 0.15).

[0055] Example 2

[0056] 100 parts by weight of base oil (the mass ratio of hydrotreated base oil 150N to hydrotreated base oil 500N is 1:1);

[0057] 8 parts by weight of nano-sized molybdenum disulfide mineral.

[0058] 0.2 parts by weight of boron nitride supported on molybdenum disulfide nanosheets;

[0059] Detergent dispersant: 2 parts by weight of succinimide

[0060] Viscosity index improver: 3 parts by weight of styrene-isoprene copolymer.

[0061] Pour point depressant: 2 parts by weight of polymethacrylate,

[0062] Antioxidant: 1.5 parts by weight of diisooctyl diphenylamine

[0063] Anti-wear agent: 0.25 parts by weight (barium petroleum sulfonate 0.04, triethanolamine oleate 0.06, tributyl phosphate 0.15).

[0064] Example 3

[0065] 100 parts by weight of base oil (the mass ratio of hydrotreated base oil 150N to hydrotreated base oil 500N is 1:1);

[0066] 8 parts by weight of nano-sized molybdenum disulfide mineral.

[0067] Two parts by weight of boron nitride loaded on molybdenum disulfide nanosheets;

[0068] Detergent dispersant: 2 parts by weight of succinimide

[0069] Viscosity index improver: 3 parts by weight of styrene-isoprene copolymer.

[0070] Pour point depressant: 2 parts by weight of polymethacrylate,

[0071] Antioxidant: 1.5 parts by weight of diisooctyl diphenylamine

[0072] Anti-wear agent: 0.25 parts by weight (barium petroleum sulfonate 0.04, triethanolamine oleate 0.06, tributyl phosphate 0.15).

[0073] Comparative Example 1

[0074] Similar to Example 1, instead of using nanoscale mineral molybdenum disulfide, boron nitride was supported on molybdenum disulfide nanosheets at a weight of 6 parts by weight.

[0075] Comparative Example 2

[0076] Similar to Example 1, boron nitride loaded on molybdenum disulfide nanosheets was not used;

[0077] Comparative Example 3

[0078] Similar to Example 1, but without using nanoscale mineral molybdenum disulfide and molybdenum disulfide nanosheets loaded with boron nitride;

[0079] Experimental methods:

[0080] Average wear scar diameter NB / SH / T 0189-2017

[0081] Maximum non-seize load GB / T 3142-2019

[0082]

[0083] It can be seen that this invention fully utilizes the extreme pressure anti-wear properties of molybdenum disulfide and boron nitride loaded with molybdenum disulfide nanosheets. Under repeated friction under high load, the molybdenum disulfide rarely breaks. The presence of the molybdenum film avoids wear caused by direct contact between the friction pairs under extreme pressure, fully demonstrating the extreme pressure anti-wear properties, lubricity, and high temperature resistance of the molybdenum film. This phenomenon is the power of molybdenum infiltration film formation.

[0084] Definitions and explanations:

[0085] Unless otherwise stated, the following terms or phrases as used herein are intended to have the following meanings. A particular phrase or term should not be considered uncertain or unclear unless specifically defined, but should be understood in its ordinary sense. When a trade name appears herein, it is intended to refer to the corresponding product or its active ingredient.

[0086] The intermediate compounds of the present invention can be prepared by various synthetic methods known to those skilled in the art, including the specific embodiments listed below, embodiments formed by combining them with other chemical synthetic methods, and equivalent substitutions known to those skilled in the art. Preferred embodiments include, but are not limited to, the embodiments of the present invention.

[0087] The chemical reactions in the specific embodiments of this invention are carried out in a suitable solvent, which must be suitable for the chemical changes of this invention and the reagents and materials required therefor. To obtain the compounds of this invention, it is sometimes necessary for those skilled in the art to modify or select the synthesis steps or reaction flow based on existing embodiments.

[0088] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. Therefore, the scope of protection of the present invention is defined by the appended claims.

Claims

1. A nano-grade mineral molybdenum disulfide lubricating oil, characterized in that, The lubricating oil comprises the following components: 100 parts by weight of base oil; 5-10 parts by weight of nano-sized molybdenum disulfide mineral. Molybdenum disulfide nanosheets loaded with boron nitride, 0.1-0.5 parts by weight; Succinimide 0.2–2 parts by weight, Viscosity index improver 1-5 parts by weight 0.2 to 2 parts by weight of pour point depressant. Antioxidant 0.1–1.5 parts by weight, Anti-wear agent 0.1 to 0.3 parts by weight.

2. The nano-grade molybdenum disulfide lubricating oil according to claim 1, characterized in that, The base oil has a kinematic viscosity of 2.0 m at 100°C. 2 / s or higher and 4.3.m 2 Lubricating oil base oil with a speed of less than / s.

3. The nano-grade mineral molybdenum disulfide lubricating oil according to claim 1, characterized in that, The viscosity index improver is selected from one or more of ethylene-propylene copolymer, styrene-isoprene copolymer, hydrogenated styrene-isoprene block copolymer, and polyisobutylene.

4. The nano-grade mineral molybdenum disulfide lubricating oil according to claim 1, characterized in that, The pour point depressant is selected from one or more of the following: fumarate type pour point depressants, alkylnaphthalene pour point depressants, polymethyl methacrylate pour point depressants, and polyolefin pour point depressants.

5. The nano-grade mineral molybdenum disulfide lubricating oil according to claim 1, characterized in that, The antioxidant is selected from one or more of 2,6-di-tert-butylphenol, diisooctyl diphenylamine, N-phenyl-N-sec-butyl-p-phenylenediamine, and 4-octyl-N-(4-octylphenyl)aniline.

6. The nano-grade mineral molybdenum disulfide lubricating oil according to claim 1, characterized in that, The nano-sized molybdenum disulfide has a particle size of 80-600 nm.

7. The nano-grade mineral molybdenum disulfide lubricating oil according to claim 6, characterized in that, The preparation method of the nano-sized mineral molybdenum disulfide lubricating oil includes the following steps: Hydrogenated base oil is pumped into a blending vessel via a filter pump while being gradually heated; polyisobutylene is added and stirred for 15-20 minutes until homogeneous. Add other additives, and keep the temperature at the beginning while stirring for 30-45 minutes until the mixture is homogeneous and completely dissolved. The nano-sized molybdenum disulfide mineral main agent was added to the mixing vessel in sequence, pulse mixing was started, and heating was carried out at the same time. The mixture was then stirred evenly after reaching a certain temperature. Pulse mix for 40-60 minutes until the mixture is homogeneous and blending is complete.

8. The application of a nano-grade mineral molybdenum disulfide lubricating oil as described in any one of claims 1-7 in a low-speed, high-torque engine.

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