Lubricating oil composition with biodegradability and preparation method thereof

Abstract

The invention belongs to the field of chemical engineering, and particularly relates to a biodegradable lubricating oil composition and a preparation method thereof. The lubricating oil composition comprises the following raw material components in percentage by weight: 91%-99% of synthetic ester type base oil, 0.04%-0.6% of an antioxidant, 0.02%-0.6% of an anti-wear reagent at extreme pressure, 0.1%-0.5% of a dispersing agent, 0.03%-0.4% of a metal deactivator and 0.1%-3% of a functional additive. The lubricating oil composition provided by the invention has outstanding biodegradation characteristic, excellent thermal stability, wear resistance, low-temperature performance and thermal oxidation stability, and is easy for industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of chemical engineering, and in particular to a biodegradable lubricating oil composition and a preparation method thereof. Background Art

[0002] Guideway oil is a special lubricant for various guideways. It is suitable for the lubrication of mechanical equipment with guideway devices itself or around it. It is also suitable for the circulating lubrication of components such as bearings and gears. It can cover the lubrication protection of different scenarios such as screws, linear guides, spindle boxes, translation screws, cylindrical and bevel gears, and light-load worm gear rotating devices. It can effectively reduce the friction and wear between mechanical friction pairs and has multiple uses such as rust prevention, oxidation prevention, lubrication and adhesion.

[0003] With the continuous advancement of production technology and the rapid development of industrial production, guide rail oil, as a lubricating medium with relatively special application scenarios, will become an irreversible trend in the future to produce environmentally friendly guide rail oil as environmental protection awareness is improved and environmental protection requirements are becoming increasingly stringent.

[0004] Biodegradable guide rail oil is a kind of environmentally friendly guide rail oil, which is biodegradable and can avoid potential environmental pollution. However, because biodegradable guide rail oil must also have the basic properties of guide rail oil, there are very few guide rail oils with biodegradable properties on the market. Summary of the invention

[0005] The invention provides a biodegradable lubricating oil composition and a preparation method thereof, so as to solve the defect of the prior art that there is a lack of biodegradable guide rail oil.

[0006] The present invention provides a base oil, comprising dibutyl phthalate (DBP) and dioctyl phthalate (DOP);

[0007] It also includes one or more of neopentyl glycol ester, trimethylolpropane ester, and monopentaerythritol ester;

[0008] Preferably, it comprises one or more of Nycobase 8110, Nycobase 8210, Nycobase 7300, Nycobase 8103, Nycobase 9300, Nycobase 8311, Nycobase 8410, Nycobase 3118, Nycobase 20365, Nycobase 8345, Nycobase 8397, Nycobase 20307FG, Nycobase 30409FG and Nycobase40810FG;

[0009] Preferably, it comprises 0.8-2.2% Nycobase 8110, 0.8-2.2% Nycobase 8210, 1.8-5.2% Nycobase 7300, 0-3.2% Nycobase 8103, 1.8-3.2% Nycobase 9300, 1.8-40% Nycobase 8311, 0.8-41% Nycobase 8410, 1.8-67% Nycobase 3118, 0.8-5.2% Nycobase 20365, 0.8-37% Nycobase 8345, 1.8-22% Nycobase 8397, 1.8-3.2% Nycobase 20307FG, 1.4-3.1% DBP and 1-3.2% DOP.

[0010] The invention provides a lubricating oil composition, which comprises the following raw material components in percentage by weight: 91-99% of synthetic ester base oil, 0.04-0.6% of antioxidant, and 0.02-0.6% of extreme pressure anti-wear agent.

[0011] Preferably, it also includes 0.1-0.5% of dispersant, 0.03-0.4% of metal deactivator and 0.1-3% of functional additive. The present invention obtains a biodegradable high-performance lubricating oil composition by compounding antioxidants, anti-wear agents, metal deactivators, functional additives, dispersants and other additives with synthetic ester base oil with excellent biodegradability, which can meet the technical requirements of L-HG in GB 11118.1 and LG in SH / T 0361, has excellent biodegradability, is friendly to the human ecological environment, and meets the use requirements of equipment lubrication in different places.

[0012] Preferably, the antioxidant is included in an amount of 0.05 to 0.5%.

[0013] Preferably, the functional additive is a stick-slip property improver.

[0014] The lubricating oil composition comprises the following raw material components in percentage by weight: 92-97% synthetic ester base oil, 0.1-0.3% antioxidant, 0.05-0.3% extreme pressure antiwear agent, 0.05-0.3% dispersant, 0.05-0.3% metal passivator and 0.5-3% functional additive.

[0015] Preferably, the lubricating oil is composed of the following components in percentage by weight: 97% synthetic ester base oil, 0.5% antioxidant, 0.35% extreme pressure antiwear agent, 0.3% dispersant, 0.3% metal passivator and 2% functional additives.

[0016] According to the lubricating oil composition, the synthetic ester base oil is selected from two or more of saturated polyol esters, diesters, monoesters and oleic acid esters.

[0017] Preferably, the kinematic viscosity of the synthetic ester base oil at 40°C is 22 to 680 mm 2 / s.

[0018] Preferably, the base oil is utilized.

[0019] The present invention selects a suitable blending ratio as the base oil to improve its stick-slip properties and anti-wear performance, and further preferably uses a combination of two or more of neopentyl glycol ester, trimethylolpropane ester, monopentaerythritol ester, dibutyl phthalate (DBP), and dioctyl phthalate (DOP), and its 40°C kinematic viscosity is 22-680 mm 2 / s, specifically: Nycobase8110, Nycobase 8210, Nycobase 7300, Nycobase 8103, Nycobase 9300, Nycobase 8311, Nycobase 8410, Nycobase 3118, Nycobase 20365, Nycobase 8345, Nycobase 8397, Nycobase 20307FG, Nycobase30409FG, Nycobase 40810FG, DBP, DOP and other substances with corresponding structures.

[0020] According to the lubricating oil composition, the antioxidant is selected from the reaction product of N-phenylaniline and 2,4,4-trimethylpentene, pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate, 2,2-oxalylamino-bis(ethyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl))propionate n-octadecyl alcohol ester, triethyl ethanol bis(3-(3-tert-butyl-5-methyl-4-hydroxyphenyl))propionate n-octadecyl alcohol ester, tris(2,4-di-tert-butyl)phenyl phosphite, hindered phenol antioxidants and 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate n-octadecyl alcohol ester, or two or more thereof. The antioxidant can improve the ability of oil products to resist oxidation deterioration at high temperatures. The amount added is controlled at 0.1-0.3%. When the amount added is too small, it will affect the ability of the guide rail oil to resist oxidation and deterioration; when the amount added is too large, it is easy to decompose at high temperature to produce black particle precipitation, which seriously affects the product quality and appearance.

[0021] Preferably, the antioxidant comprises 0.008-0.06% RIANOX 3114, 0.008-0.2% RIANOX 1010, 0.006-0.17% RIANOX 1076, 0-0.08% antioxidant 168, 0.008-0.09% RIANOX MD-697, 0.008-0.09% RIANOX 5057.

[0022] The extreme pressure anti-wear agent is selected from sulfurized isobutylene (including but not limited to T321), triphenyl thiophosphate (including but not limited to RHY322) or sulfurized fatty acid triglyceride (including but not limited to YD-1810) and the like.

[0023] Preferably, the extreme pressure antiwear agent comprises 0.018-0.022% T109, 0.03-0.12% S206, 0.1-0.3% T106 and 0.02-0.22% OLOA 219.

[0024] Preferably, in the composition, the extreme pressure anti-wear agent can effectively improve the anti-wear ability and load-bearing capacity of the oil under heavy load. The addition amount is controlled at 0.05-0.3%. When the addition amount is too small, the extreme pressure anti-wear performance is difficult to meet the target requirements; when the addition amount is too large, it faces great challenges in terms of economy and oil anti-corrosion performance.

[0025] According to the lubricating oil composition, the dispersant is selected from one or more of a bis-alkenyl succinimide ashless dispersant, a polyisobutylene bis-succinimide and a polyisobutylene polysuccinimide ashless dispersant.

[0026] Preferably, the dispersant includes 0.06-0.22% T152, 0.06-0.24% T154 and 0.01-0.03% T155.

[0027] Preferably, in the lubricating oil composition, the dispersant can prevent the sludge deposition generated during the use of the oil. The dispersant is selected from a diene succinimide ashless dispersant (including but not limited to T152), a high nitrogen polyisobutylene succinimide (including but not limited to T154) or a low nitrogen polyisobutylene succinimide ashless dispersant (including but not limited to T155), etc. The addition amount is controlled at 0.05-0.3%. When the addition amount is too small, the dispersibility is poor and it is difficult to effectively control the formation of precipitates; when the addition amount is too large, there are side effects, which affect the long-term use effect of the subsequent guide rail oil.

[0028] According to the lubricating oil composition, the metal passivator is a heterocyclic benzotriazole derivative.

[0029] Preferably, the metal passivator includes 0.02-0.25% T553 and 0.08-0.2% T551.

[0030] And / or, the functional additive includes tetralin and / or decalin.

[0031] Preferably, the functional additives include 0.1-1% decalin and 0.05-2% perhydrodibenzyltoluene.

[0032] Preferably, in the lubricating oil composition, the metal passivator can reduce the catalytic effect of the metal on the oxidation rate, and finally achieve the purpose of extending the service life of the oil. The metal passivator is a heterocyclic benzotriazole derivative (including but not limited to T551 and T553, etc.). The addition amount is controlled at 0.05-0.5%. When the addition amount is too small or too large, the long-term use effect of the guide rail oil will be seriously affected.

[0033] The functional additive of the present invention can more effectively prolong the service life of the guide rail oil. The added amount is controlled at 0.5-3%. When the added amount is too small or too large, it is difficult to exert a good synergistic effect.

[0034] According to the lubricating oil composition, the lubricating oil includes the following raw material components in percentage by weight: 1% Nycobase 8110, 2% Nycobase 8210, 5% Nycobase 7300, 2% Nycobase 8103, 2% Nycobase9300, 38% Nycobase 8311, 30% Nycobase 8410, 2% Nycobase 3118, 4% Nycobase 20365, 1% Nycobase 8345, 3% Nycobase 8397, 2% Nycobase 20307FG, 1.5% DBP, 1.37% DOP, 0.01% RIANOX 3114, 0.01% RIANOX 1010, 0.01% RIANOX 1076, 0% antioxidant 168, 0.01% RIANOX MD-697, 0.01% RIANOX 5057, 0.02% T109, 0.12% S206, 0.25% T106, 0.19% OLOA219, 0.18% T152, 0.22% T154, 0.02% T155, 0.22% T553, 0.16% T551, 0.8% decalin and 1.9% perhydrodibenzyltoluene.

[0035] Or, the lubricating oil comprises the following raw material components in percentage by weight: 1% Nycobase8110, 1% Nycobase 8210, 2% Nycobase 7300, 2% Nycobase 8103, 2% Nycobase 9300, 5% Nycobase8311, 40% Nycobase 8410, 32% Nycobase 3118, 2% Nycobase 20365, 1% Nycobase 8345, 3% Nycobase 8397, 3% Nycobase 20307FG, 1.43% DBP, 1.1% DOP, 0.02% RIANOX 3114, 0.1% RIANOX 1010, 0.02% RIANOX 1076, 0.02% antioxidant 168, 0.05% RIANOX MD-697, 0.08% RIANOX 5057, 0.02% T109, 0.1% S206, 0.25% T106, 0.15% OLOA 219, 0.16% T152, 0.18% T154, 0.02% T155, 0.18% T553, 0.12% T551, 0.6% decalin, and 1.4% perhydrodibenzyltoluene.

[0036] Or, the lubricating oil comprises the following raw material components in percentage by weight: 1% Nycobase8110, 2% Nycobase 8210, 2% Nycobase 7300, 3% Nycobase 8103, 2% Nycobase 9300, 7% Nycobase8311, 1% Nycobase 8410, 66% Nycobase 3118, 2% Nycobase 20365, 2% Nycobase 8345, 2% Nycobase 8397, 3% Nycobase 20307FG, 2.01% DBP, 1.8% DOP, 0.05% RIANOX 3114, 0.1% RIANOX 1010, 0.08% RIANOX 1076, 0.07% antioxidant 168, 0.08% RIANOX MD-697, 0.12% RIANOX 5057, 0.02% T109, 0.08% S206, 0.22% T106, 0.11% OLOA 219, 0.14% T152, 0.16% T154, 0.02% T155, 0.15% T553, 0.09% T551, 0.5% decalin, and 1.2% perhydrodibenzyltoluene.

[0037] Or, the lubricating oil comprises the following raw material components in percentage by weight: 2% Nycobase8110, 1% Nycobase 8210, 2% Nycobase 7300, 0% Nycobase 8103, 2% Nycobase 9300, 2% Nycobase8311, 3% Nycobase 8410, 34% Nycobase 3118, 1% Nycobase 20365, 35% Nycobase 8345, 10% Nycobase 8397, 2% Nycobase 20307FG, 2.16% DBP, 1.2% DOP, 0.02% RIANOX 3114, 0.05% RIANOX 1010, 0.05% RIANOX 1076, 0.06% antioxidant 168, 0.03% RIANOX MD-697, 0.12% RIANOX 5057, 0.02% T109, 0.06% S206, 0.18% T106, 0.09% OLOA 219, 0.12% T152, 0.15% T154, 0.02% T155, 0.11% T553, 0.06% T551, 0.4% decalin, and 1.1% perhydrodibenzyltoluene.

[0038] Or, the lubricating oil comprises the following raw material components in percentage by weight: 2% Nycobase8110, 2% Nycobase 8210, 3% Nycobase 7300, 1% Nycobase 8103, 3% Nycobase 9300, 4% Nycobase8311, 1% Nycobase 8410, 36% Nycobase 3118, 3% Nycobase 20365, 22% Nycobase 8345, 15% Nycobase 8397, 2% Nycobase 20307FG, 2.19% DBP, 2% DOP, 0.05% RIANOX 3114, 0.18% RIANOX 1010, 0.15% RIANOX 1076, 0.02% antioxidant 168, 0.05% RIANOX MD-697, 0.01% RIANOX 5057, 0.02% T109, 0.05% S206, 0.16% T106, 0.06% OLOA 219, 0.1% T152, 0.11% T154, 0.02% T155, 0.08% T553, 0.05% T551, 0.3% decalin, and 0.4% perhydrodibenzyltoluene.

[0039] Or, the lubricating oil comprises the following raw material components in weight percentage: 1% Nycobase8110, 2% Nycobase 8210, 3% Nycobase 7300, 3% Nycobase 8103, 2% Nycobase 9300, 5% Nycobase8311, 3% Nycobase 8410, 38% Nycobase 3118, 5% Nycobase 20365, 10% Nycobase 8345, 20% Nycobase 8397, 2% Nycobase 20307FG, 2.94% DBP, 2% DOP, 0.02% RIANOX 3114, 0.12% RIANOX 1010, 0.08% RIANOX 1076, 0.04% antioxidant 168, 0.05% RIANOX MD-697, 0.02% RIANOX 5057, 0.02% T109, 0.04% S206, 0.12% T106, 0.03% OLOA 219, 0.08% T152, 0.08% T154, 0.02% T155, 0.03% T553, 0.01% T551, 0.2% decalin, and 0.1% perhydrodibenzyltoluene.

[0040] In the lubricating oil composition of the present invention, the functional additive can exert a unique synergistic effect with the antioxidant, extreme pressure anti-wear agent and dispersant, and effectively improve the comprehensive performance of the oil in terms of antioxidant performance and extreme pressure anti-wear performance.

[0041] The present invention also provides a method for preparing the lubricating oil composition, which comprises first heating the synthetic ester base oil to 50-70°C, then adding an antioxidant and a functional additive and stirring until the mixture is uniform and transparent, and then adding an extreme pressure anti-wear agent, a dispersant and a metal passivator for compounding.

[0042] The preparation process of the guide rail oil composition involved in the present invention is as follows: firstly heat the synthetic ester base oil to 50-60°C, then add functional additives and antioxidants and stir until uniform and transparent, and then add extreme pressure anti-wear agent, dispersant and metal passivator to compound.

[0043] The present invention also provides a lubricating oil composition, which is prepared by the preparation method.

[0044] The present invention also provides application of the lubricating oil composition as guide rail oil.

[0045] Beneficial effects of the present invention:

[0046] The present invention selects a base oil with a suitable synthetic ester structure, adds an antioxidant, an extreme pressure anti-wear agent, a dispersant, a metal passivator and a functional additive, etc., and mixes them. The type and proportion of the additives are selected, and the components are reasonably proportioned to achieve a synergistic effect, so as to obtain a biodegradable guide rail oil with excellent extreme pressure anti-wear performance and anti-stick-slip properties, which is mainly based on synthetic ester base oil. By measuring stick-slip properties, gear machine tests, wear spot diameter, maximum non-seizure load, anti-emulsification, liquid phase rust, copper sheet corrosion, viscosity, flash point, copper sheet corrosion, etc., the guide rail oil product performance is comprehensively evaluated to meet the technical requirements of L-HG in GB11118.1 and LG in SH / T0361.

[0047] The guide rail oil composition provided by the present invention has outstanding biodegradability (biodegradation rate is greater than 75%, OECD301B), excellent stick-slip properties, extreme pressure anti-wear and oxidation stability, good low-temperature performance (pour point reaches below -35°C), and is easy to industrialize and produce.

[0048] The lubricating oil described in the present invention can be used as a guide rail oil, which can not only meet the performance requirements of lubrication and protection of different types of equipment involving guide rails in various scenarios, but also has excellent ecological effects, and has outstanding characteristics such as biodegradability, non-toxicity and non-ecotoxicity. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The experimental methods used in the following examples are conventional methods unless otherwise specified. The experimental raw materials and related equipment used in the following examples are all commercially available unless otherwise specified.

[0051] Example 1

[0052] The preparation of the guide rail oil composition comprises the following steps:

[0053] According to the ratios in Example 1-1 to Example 1-6 shown in Table 1, the base oil is first heated to 60° C., and then antioxidants and functional additives are added and stirred until uniform and transparent, and finally extreme pressure anti-wear agent, dispersant, and metal passivator are respectively added and stirred to form a uniform mixture.

[0054] Table 1 Component ratios of Example 1-1 to Example 1-6 (percentage by weight)

[0055]

[0056]

[0057] The base oil used in the above examples 1-1 to 1-6 has a viscosity of 22-150 mm at 40°C. 2 / s varies.

[0058] The guide rail oil compositions of Examples 1-1 to 1-6 were evaluated for various properties, and the results are shown in Table 2.

[0059] Table 2 Evaluation data of guide rail oil compositions of Examples 1-1 to 1-6

[0060]

[0061]

[0062] *Note: Products involved in L-HG include viscosity grades such as ISO 32, ISO 46, ISO68, ISO 100, etc.; **Note: Products involved in LG include viscosity grades such as ISO 32, ISO 46, ISO68, ISO 100, ISO 150, ISO220, ISO3200, etc.;

[0063] **Note: Control sample 1 is ordinary L-HG68 product.

[0064] Through the above performance evaluation, the best embodiments are 2-5.

[0065] The above data show that the lubricating oil product of the present invention has excellent biodegradability, and the biodegradation rate is higher than the standard requirement (OECD requirement ≥70%), and is an environmentally friendly product; at the same time, it can meet the technical requirements of L-HG in GB 11118.1 and LG in SH / T 0361, and has excellent stick-slip characteristics, extreme pressure anti-wear properties, oxidation stability, and low-temperature performance, and is suitable for lubrication and protection of slide rails and tracks of various mechanical equipment.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A base oil, characterized in that: Including dibutyl phthalate (DBP) and dioctyl phthalate (DOP); It also includes one or more of neopentyl glycol ester, trimethylolpropane ester, and monopentaerythritol ester; Preferably, it comprises one or more of Nycobase 8110, Nycobase 8210, Nycobase 7300, Nycobase 8103, Nycobase 9300, Nycobase 8311, Nycobase 8410, Nycobase 3118, Nycobase 20365, Nycobase 8345, Nycobase 8397, Nycobase 20307FG, Nycobase 30409FG and Nycobase40810FG; Preferably, it comprises 0.8-2.2% Nycobase 8110, 0.8-2.2% Nycobase 8210, 1.8-5.2% Nycobase 7300, 0-3.2% Nycobase 8103, 1.8-3.2% Nycobase 9300, 1.8-40% Nycobase 8311, 0.8-41% Nycobase 8410, 1.8-67% Nycobase 3118, 0.8-5.2% Nycobase 20365, 0.8-37% Nycobase 8345, 1.8-22% Nycobase 8397, 1.8-3.2% Nycobase 20307FG, 1.4-3.1% DBP and 1-3.2% DOP.

2. A lubricating oil composition, characterized in that: The invention comprises the following raw material components in weight percentage: 91-99% of synthetic ester base oil, 0.04-0.6% of antioxidant and 0.02-0.6% of extreme pressure anti-wear agent; Preferably, it also includes 0.1-0.5% of dispersant, 0.03-0.4% of metal passivator and 0.1-3% of functional additive; Preferably, it includes 0.05-0.5% antioxidant; Preferably, the synthetic ester base oil is selected from two or more of saturated polyol esters, diesters, monoesters and oleates; Preferably, the kinematic viscosity of the synthetic ester base oil at 40°C is 22 to 680 mm 2 / s; Preferably, the base oil according to claim 1 is used; Preferably, the raw material components include the following weight percentages: 92-97% synthetic ester base oil, 0.1-0.3% antioxidant, 0.05-0.3% extreme pressure antiwear agent, 0.05-0.3% dispersant, 0.05-0.3% metal passivator and 0.5-3% functional additive; Further preferably, the lubricating oil is composed of the following components in percentage by weight: 97% synthetic ester base oil, 0.5% antioxidant, 0.35% extreme pressure antiwear agent, 0.3% dispersant, 0.3% metal passivator and 2% functional additives.

3. The lubricating oil composition according to claim 2, characterized in that The antioxidant is selected from the reaction product of N-phenylaniline and 2,4,4-trimethylpentene, pentaerythritol tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate, 2,2-oxalylamino-bis(ethyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl))propionate n-octadecyl alcohol ester, triethyl ethanol bis(3-(3-tert-butyl-5-methyl-4-hydroxyphenyl))propionate n-octadecyl alcohol ester, tri(2,4-di-tert-butyl)phenyl phosphite, hindered phenol antioxidants, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate n-octadecyl alcohol ester, or two or more thereof; Preferably, the antioxidant comprises 0.008-0.06% RIANOX 3114, 0.008-0.2% RIANOX 1010, 0.006-0.17% RIANOX 1076, 0-0.08% antioxidant 168, 0.008-0.09% RIANOX MD-697, 0.008-0.09% RIANOX 5057.

4. The lubricating oil composition according to any one of claims 2 to 3, characterized in that: The dispersant is selected from one or more of bis-alkenyl succinimide ashless dispersant, polyisobutylene bis-succinimide and polyisobutylene polysuccinimide ashless dispersant; preferably, the dispersant includes 0.06-0.22% T152, 0.06-0.24% T154 and 0.01-0.03% T155; and / or, the metal passivator is a heterocyclic benzotriazole derivative; Preferably, the metal passivator comprises 0.02-0.25% T553, 0.08-0.2% T551; And / or, the functional additive includes tetralin and / or decalin; Preferably, the functional additives include 0.1-1% decalin and 0.05-2% perhydrodibenzyltoluene.

5. The lubricating oil composition according to any one of claims 2 to 4, characterized in that: The extreme pressure anti-wear agent is selected from sulfurized isobutylene (including but not limited to T321), triphenyl thiophosphate (including but not limited to RHY322) or sulfurized fatty acid triglyceride (including but not limited to YD-1810), etc.; Preferably, the extreme pressure antiwear agent comprises 0.018-0.022% T109, 0.03-0.12% S206, 0.1-0.3% T106 and 0.02-0.22% OLOA 219.

6. The lubricating oil composition according to any one of claims 2 to 5, characterized in that: The lubricating oil comprises the following raw material components in percentage by weight: 1% Nycobase 8110, 2% Nycobase 8210, 5% Nycobase 7300, 2% Nycobase 8103, 2% Nycobase9300, 38% Nycobase 8311, 30% Nycobase 8410, 2% Nycobase3118, 4% Nycobase 20365, 1% Nycobase 8345, 3% Nycobase 8397, 2% Nycobase 20307FG, 1.5% DBP, 1.37% DOP, 0.01% RIANOX 3114, 0.01% RIANOX 1010, 0.01% RIANOX 1076, 0% antioxidant 168, 0.01% RIANOX MD-697, 0.01% RIANOX 5057, 0.02% T109, 0.12% S206, 0.25% T106, 0.19% OLOA 219, 0.18% T152, 0.22% T154, 0.02% T155, 0.22% T553, 0.16% T551, 0.8% decalin, and 1.9% perhydrodibenzyltoluene; Or, the lubricating oil comprises the following raw material components in percentage by weight: 1% Nycobase8110, 1% Nycobase8210, 2% Nycobase 7300, 2% Nycobase 8103, 2% Nycobase 9300, 5% Nycobase 8311, 40% Nycobase 8410, 32% Nycobase 3118, 2% Nycobase 20365, 1% Nycobase 8345, 3% Nycobase 8397, 3% Nycobase 20307FG, 1.43% DBP, 1.1% DOP, 0.02% RIANOX 3114, 0.1% RIANOX 1010, 0.02% RIANOX 1076, 0.02% antioxidant 168, 0.05% RIANOX MD-697, 0.08% RIANOX 5057, 0.02% T109, 0.1% S206, 0.25% T106, 0.15% OLOA 219, 0.16% T152, 0.18% T154, 0.02% T155, 0.18% T553, 0.12% T551, 0.6% decalin, and 1.4% perhydrodibenzyltoluene; Or, the lubricating oil comprises the following raw material components in percentage by weight: 1% Nycobase8110, 2% Nycobase8210, 2% Nycobase 7300, 3% Nycobase 8103, 2% Nycobase 9300, 7% Nycobase 8311, 1% Nycobase 8410, 66% Nycobase 3118, 2% Nycobase 20365, 2% Nycobase 8345, 2% Nycobase 8397, 3% Nycobase 20307FG, 2.01% DBP, 1.8% DOP, 0.05% RIANOX 3114, 0.1% RIANOX 1010, 0.08% RIANOX 1076, 0.07% antioxidant 168, 0.08% RIANOX MD-697, 0.12% RIANOX 5057, 0.02% T109, 0.08% S206, 0.22% T106, 0.11% OLOA 219, 0.14% T152, 0.16% T154, 0.02% T155, 0.15% T553, 0.09% T551, 0.5% decalin, and 1.2% perhydrodibenzyltoluene; Or, the lubricating oil comprises the following raw material components in percentage by weight: 2% Nycobase8110, 1% Nycobase8210, 2% Nycobase 7300, 0% Nycobase 8103, 2% Nycobase 9300, 2% Nycobase 8311, 3% Nycobase 8410, 34% Nycobase 3118, 1% Nycobase 20365, 35% Nycobase 8345, 10% Nycobase 8397, 2% Nycobase 20307FG, 2.16% DBP, 1.2% DOP, 0.02% RIANOX 3114, 0.05% RIANOX 1010, 0.05% RIANOX 1076, 0.06% antioxidant 168, 0.03% RIANOX MD-697, 0.12% RIANOX 5057, 0.02% T109, 0.06% S206, 0.18% T106, 0.09% OLOA 219, 0.12% T152, 0.15% T154, 0.02% T155, 0.11% T553, 0.06% T551, 0.4% decalin, and 1.1% perhydrodibenzyltoluene; Or, the lubricating oil comprises the following raw material components in percentage by weight: 2% Nycobase8110, 2% Nycobase8210, 3% Nycobase 7300, 1% Nycobase 8103, 3% Nycobase 9300, 4% Nycobase 8311, 1% Nycobase 8410, 36% Nycobase 3118, 3% Nycobase 20365, 22% Nycobase 8345, 15% Nycobase 8397, 2% Nycobase 20307FG, 2.19% DBP, 2% DOP, 0.05% RIANOX 3114, 0.18% RIANOX 1010, 0.15% RIANOX 1076, 0.02% antioxidant 168, 0.05% RIANOX MD-697, 0.01% RIANOX 5057, 0.02% T109, 0.05% S206, 0.16% T106, 0.06% OLOA 219, 0.1% T152, 0.11% T154, 0.02% T155, 0.08% T553, 0.05% T551, 0.3% decalin, and 0.4% perhydrodibenzyltoluene.

7. The lubricating oil composition according to any one of claims 2 to 6, characterized in that: The lubricating oil comprises the following raw material components in weight percentage: the lubricating oil comprises the following raw material components in weight percentage: 1% Nycobase8110, 2% Nycobase 8210, 3% Nycobase 7300, 3% Nycobase 8103, 2% Nycobase 9300, 5% Nycobase8311, 3% Nycobase 8410, 38% Nycobase 3118, 5% Nycobase 20365, 10% Nycobase 8345, 20% Nycobase 8397, 2% Nycobase 20307FG, 2.94% DBP, 2% DOP, 0.02% RIANOX 3114, 0.12% RIANOX 1010, 0.08% RIANOX 1076, 0.04% antioxidant 168, 0.05% RIANOX MD-697, 0.02% RIANOX 5057, 0.02% T109, 0.04% S206, 0.12% T106, 0.03% OLOA 219, 0.08% T152, 0.08% T154, 0.02% T155, 0.03% T553, 0.01% T551, 0.2% decalin and 0.1% perhydrodibenzyltoluene.

8. The method for preparing the lubricating oil composition according to any one of claims 2 to 7, characterized in that: The method is prepared by first heating the synthetic ester base oil to 50-70°C, then adding antioxidants and functional additives and stirring until the mixture is uniform and transparent, and then adding extreme pressure anti-wear agents, dispersants and metal passivators for compounding.

9. A lubricating oil composition, characterized in that: The lubricating oil composition is prepared by the method for preparing the lubricating oil composition according to claim 8.

10. Use of the lubricating oil composition according to any one of claims 2 to 7 or claim 9 as guideway oil.

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