Vinyl alkyl ether grafted hydrogen-containing silicone oil modified organic silicon lubricant as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of modified hydrogen-containing silicone oil, and particularly relates to a vinyl alkyl ether grafted hydrogen-containing silicone oil modified organic silicon lubricant and a preparation method thereof. The preparation method comprises the following steps: dissolving hydrogen-containing silicone oil and a modifier vinyl alkyl ether in a solvent in a protective gas atmosphere, and carrying out a hydrosilylation reaction in the presence of a transition metal catalyst and a polymerization inhibitor to obtain the vinyl alkyl ether grafted hydrogen-containing silicone oil modified organic silicon lubricant. The vinyl alkyl ether is grafted on the hydrogen-containing silicone oil, and the vinyl alkyl ether is used as a modifier to modify the hydrogen-containing silicone oil, so that the obtained modified hydrogen-containing silicone oil can combine the advantages of the hydrogen-containing silicone oil and the vinyl alkyl ether, and the properties of lubrication, wear resistance, extrusion resistance and the like of a base material can be remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of modified hydrogen-containing silicone oil, and specifically relates to an organosilicon lubricant modified by vinyl alkyl ether grafted hydrogen-containing silicone oil, and a preparation method and application thereof. Background Art

[0002] Hydrogenated silicone oil is an important organosilicon product that can be used in lubricants, gear oils and other fields. Hydrogenated silicone oil has good low temperature resistance, insulation, physiological inertness, oxidation resistance and other properties. It is widely used in various fields such as machinery, electrical, textile and medicine, and is a key research object in polymer organosilicon materials. By grafting various vinyl alkyl ethers on hydrogenated silicone oil, the lubricity, hydrophobicity, defoaming, extrusion resistance and affinity for organic materials of hydrogenated silicone oil can be significantly improved, making its application more and more extensive. The materials obtained by introducing other organic groups into hydrogenated silicone oil can obtain some new excellent properties and have a wide range of applications in production and life.

[0003] The molecular formula of hydrogenated silicone oil is (CH3)3SiO[(CH3)(H)SiO]nSi(CH3)3, which is the key research object in polymer silicone materials. The materials obtained by introducing other organic groups into hydrogenated silicone oil can obtain some new excellent properties and have a wide range of applications in production and life. With the continuous advancement of industrial technology, the role of gears in industrial manufacturing cannot be ignored. Gear oil is used in various gear transmission devices and has a certain lubrication effect. It can reduce the wear of gears and other moving parts, extend the life of gears, reduce power loss, disperse heat, and play a certain cooling role; at the same time, gear oil can also reduce the vibration and impact between gears and improve the transmission power. However, most of the gear oil products on the market are based on fully synthetic oil, which has great pollution to the environment. In addition, the production of such gear oil is relatively complex and costly. The temperature rise is relatively high during the operation of the machinery, the vibration is large, and the lubrication performance is poor. Therefore, it is urgent to develop a gear oil with good performance to achieve high reliability and long service life of industrial equipment.

[0004] However, the existing alkyl ether silicone oil preparation process still generally has poor product quality and is difficult to meet demand. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a silicone lubricant modified by grafting hydrogenated silicone oil with vinyl alkyl ether, and a preparation method and application thereof. The present invention provides a process for preparing hydrogenated silicone oil modified with vinyl alkyl ether with low cost and high product quality. By grafting vinyl alkyl ether on hydrogenated silicone oil, and using vinyl alkyl ether as a modifier to modify hydrogenated silicone oil, the obtained modified hydrogenated silicone oil can combine the advantages of hydrogenated silicone oil and vinyl alkyl ether, and can significantly improve the lubrication, anti-wear, anti-extrusion and other properties of the substrate. The prepared modified hydrogenated silicone oil is of great significance as a lubricant and gear oil.

[0006] The present invention solves the above technical problems through the following technical solutions.

[0007] The first object of the present invention is to provide a method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant, comprising the following steps:

[0008] In a protective gas atmosphere, hydrogen-containing silicone oil and a modifier vinyl alkyl ether are dissolved in a solvent, and a hydrosilylation reaction occurs in the presence of a transition metal catalyst and an inhibitor to obtain a silicone lubricant modified with vinyl alkyl ether grafted hydrogen-containing silicone oil.

[0009] The reaction route is as follows:

[0010]

[0011] Among them, the R group is a C2-C8 alkyl group, and n is 40-60.

[0012] Preferably, the molar ratio of the silicon-hydrogen bonds in the hydrogen-containing silicone oil to the olefins in the modifier vinyl alkyl ether is 1:0.5 to 1:3.

[0013] Preferably, the vinyl alkyl ether is vinyl isobutyl ether, vinyl ethyl ether, vinyl propyl ether, vinyl tert-butyl ether or vinyl isooctyl ether.

[0014] Preferably, the temperature of the hydrosilylation reaction is room temperature to 100° C., the reaction time is 5 h to 20 h, and the protective gas is nitrogen.

[0015] Preferably, the amount of the transition metal catalyst is 0.05wt.% to 1wt.% of the mass of the hydrogen-containing silicone oil, and the transition metal catalyst is selected from at least one of chloroplatinic acid catalyst, platinum catalyst, (Ph3P)4Pd, and (Ph3P)2NiCl2.

[0016] Preferably, the dosage of the polymerization inhibitor is 0.05wt.% to 1wt.% of the mass of the hydrogen-containing silicone oil; the polymerization inhibitor is at least one of hydroquinone, 2,6-di-tert-butyl-p-methylphenol, and p-chlorobenzoquinone.

[0017] Preferably, the hydrogen content of the hydrogen-containing silicone oil is 0.36wt.% to 1.6wt.%.

[0018] Preferably, the solvent is toluene or xylene.

[0019] Preferably, in order to further improve the performance of the modified hydrogen-containing silicone oil, after the hydrosilylation reaction is completed, the product is filtered, washed with warm water several times to remove the transition metal catalyst, and then distilled under reduced pressure to obtain the product modified hydrogen-containing silicone oil.

[0020] The second object of the present invention is to provide a vinyl alkyl ether grafted hydrogen-containing silicone oil modified silicone lubricant prepared by the above preparation method, wherein the viscosity of the silicone lubricant at 40°C is 375.0 mm 2 / s, the viscosity at 100°C is 88.2mm 2 / s, the viscosity index is 312, and the viscosity of the raw hydrogenated silicone oil at 40°C is 16.0 mm 2 / s, viscosity at 100°C is 6.4 mm 2 / s, the viscosity index is 426. The viscosity indexes of both the raw material and the product are relatively large, indicating that their viscosity changes little with temperature, that is, their viscosity-temperature performance is relatively good; the pour point of the raw material hydrogen-containing silicone oil is -49°C, and the pour point of the product silicone lubricant is -46°C. The pour points of both are relatively low and are suitable for low-temperature environments; the antioxidant time of the raw material hydrogen-containing silicone oil is 5min, and the antioxidant time of the product modified hydrogen-containing silicone oil is 260min. After modification, the antioxidant time of the product is greatly increased and the antioxidant property is greatly enhanced.

[0021] The third object of the present invention is to provide the use of the above-mentioned vinyl alkyl ether grafted hydrogen-containing silicone oil modified organosilicon lubricant in the preparation of gear oil.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The invention provides a low-cost and high-quality vinyl alkyl ether modified hydrogenated silicone oil preparation process. The hydrogenated silicone oil and the modifier vinyl alkyl ether are used as raw materials. Vinyl alkyl ether is grafted onto Si of the hydrogenated silicone oil to form a product with an ether bond. The lone electron pair on the oxygen atom coordinates with the empty orbit of the metal and can be more easily adsorbed on the metal surface. The obtained modified hydrogenated silicone oil combines the advantages of the hydrogenated silicone oil and the vinyl alkyl ether, and can significantly improve the lubrication, wear resistance, extrusion resistance and other properties of the substrate. The preparation process is simple, the cost is low, the yield is high, the viscosity of the product changes little with temperature, that is, the viscosity-temperature property is good, the pour point is relatively low, and the product is suitable for low-temperature environments. The anti-oxidation time of the modified hydrogenated silicone oil is 260 minutes. After the modification, the anti-oxidation time of the product is greatly increased, and the anti-oxidation property is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the H-NMR spectrum of the vinyl isobutyl ether modified hydrogen-containing silicone oil of Example 1 of the present invention.

[0025] Figure 2 This is the NMR carbon spectrum of the vinyl isobutyl ether modified hydrogen-containing silicone oil in Example 1 of the present invention.

[0026] Figure 3 This is the infrared spectrum of the vinyl isobutyl ether modified hydrogen-containing silicone oil of Example 1 of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0028] It should be noted that the professional terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention. Unless otherwise specifically stated, the various raw materials, reagents, instruments and equipment used in the following embodiments of the present invention can be purchased from the market or prepared by existing methods.

[0029] In one aspect, the present invention provides a method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant, comprising the following steps:

[0030] In a protective gas atmosphere, hydrogen-containing silicone oil and a modifier vinyl alkyl ether are dissolved in a solvent, and a hydrosilylation reaction occurs in the presence of a catalyst and an inhibitor to obtain a silicone lubricant modified with vinyl alkyl ether grafted hydrogen-containing silicone oil.

[0031] The reaction route is as follows:

[0032]

[0033] Among them, the R group is a C2-C8 alkyl group, and n is 40-60.

[0034] In the present invention, under the action of a transition metal catalyst, the Si-H bond is oxidized and added to the metal center, the olefin is coordinated with the metal silicon hydride compound, the olefin is inserted into the metal hydride bond, and the Si-C bond is reduced and eliminated to obtain a product. Vinyl alkyl ether is grafted on the Si of hydrogen-containing silicone oil, so that the obtained modified hydrogen-containing silicone oil can combine the advantages of hydrogen-containing silicone oil and vinyl alkyl ether, and can significantly improve the lubrication, wear resistance, extrusion resistance and other properties of the substrate. The preparation process is simple, the cost is low, the yield is high, the viscosity of the product changes little with temperature, that is, its viscosity-temperature performance is good, the pour point is relatively low, and it is suitable for low-temperature environments; the modified hydrogen-containing silicone oil has enhanced oxidation resistance.

[0035] In a specific embodiment, in order to further improve the performance of the modified hydrogenated silicone oil, after the completion of the hydrosilylation reaction, the product is filtered, washed with warm water several times to remove the transition metal catalyst, and then distilled under reduced pressure to obtain the product vinyl alkyl ether grafted hydrogenated silicone oil modified silicone lubricant.

[0036] In a specific embodiment, the molar ratio of the silicon-hydrogen bonds in the hydrogen-containing silicone oil to the olefins in the modifier vinyl alkyl ether is 1:0.5 to 1:3.

[0037] In a specific embodiment, the vinyl alkyl ether is vinyl isobutyl ether, vinyl ethyl ether, vinyl propyl ether, vinyl tert-butyl ether or vinyl isooctyl ether.

[0038] In a specific embodiment, the temperature of the hydrosilylation reaction is room temperature to 100° C., the reaction time is 5 h to 20 h, and the protective gas is nitrogen.

[0039] In a specific embodiment, the amount of the transition metal catalyst is 0.05% to 1% of the mass of the hydrogen-containing silicone oil; the transition metal catalyst is selected from at least one of chloroplatinic acid catalyst, platinum catalyst, (Ph3P)4Pd, (Ph3P)2NiCl2. When the amount of the transition metal catalyst is too much, it is not conducive to the reaction, and the product is easy to solidify.

[0040] In a specific embodiment, the amount of the polymerization inhibitor is 0.05wt.% to 1wt.% of the mass of the hydrogen-containing silicone oil; the polymerization inhibitor is at least one of hydroquinone, 2,6-di-tert-butyl-p-methylphenol, and p-chlorobenzoquinone. When the polymerization inhibitor is too much, the reaction effect is not proportional and it causes waste.

[0041] In a specific embodiment, the hydrogen content of the hydrogen-containing silicone oil is 0.36wt.% to 1.6wt.%. Since the molecule contains a certain number of relatively active Si-H bonds, under the action of a catalyst, it can chemically react with the double bond active groups on the vinyl alkyl ether to generate a modified hydrogen-containing silicone oil product, which can significantly improve the lubrication, wear resistance, extrusion resistance and other properties of the substrate.

[0042] In a specific embodiment, the solvent is toluene or xylene.

[0043] The invention is further described below through specific examples.

[0044] Example 1

[0045] A method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant comprises the following steps:

[0046] At room temperature to 100°C, 20.0g of hydrogenated silicone oil, 50.0mL of toluene, 28.0mg of chloroplatinic acid and 55.0mg of hydroquinone were added to a three-necked flask protected by nitrogen in sequence. After stirring evenly, 35.2g of vinyl isobutyl ether diluted with 20.0mL of toluene was slowly added dropwise through a constant pressure separatory funnel. The addition time was controlled at 0.5 to 3h. During the reaction, nitrogen was protected and the reaction was carried out at a constant temperature for 5 to 20h. After the reaction was completed, it was filtered, washed with warm water several times to remove chloroplatinic acid, and then distilled under reduced pressure to obtain 43.5g of the product with a yield of 79%.

[0047] The reaction route is as follows:

[0048]

[0049] Among them, n is 60.

[0050] Example 2

[0051] A method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant comprises the following steps:

[0052] At room temperature to 100°C, 20.0g of hydrogenated silicone oil, 50.0mL of p-xylene, 28.0mg of (Ph3P)4Pd and 55.0mg of hydroquinone were added to a three-necked flask protected by nitrogen in sequence. After stirring evenly, 28.8g of vinyl tert-butyl ether diluted with 20.0mL of toluene was slowly added dropwise through a constant pressure separatory funnel. The addition time was controlled at 0.5 to 3h. During the reaction, nitrogen was protected and the reaction was carried out at a constant temperature for 5 to 20h. After the reaction was completed, it was filtered, washed three times with warm water to remove (Ph3P)4Pd, and then distilled under reduced pressure to obtain 40.0g of the product with a yield of 72%.

[0053] The reaction route is as follows:

[0054]

[0055] Among them, n is 40.

[0056] Example 3

[0057] A method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant comprises the following steps:

[0058] At room temperature to 100°C, 20.0g of hydrogenated silicone oil, 50.0mL of m-xylene, 28.0mg of chloroplatinic acid and 55.0mg of 2,6-di-tert-butyl-p-methylphenol were added to a three-necked flask under nitrogen protection in sequence. After stirring evenly, 55.2g of vinyl isooctyl ether diluted with 50.0mL of m-xylene was slowly added dropwise through a constant pressure separatory funnel. The addition time was controlled at 0.5 to 3h. During the reaction, nitrogen was protected and the reaction was carried out at a constant temperature for 5 to 20h. After the reaction was completed, it was filtered, washed with warm water several times to remove chloroplatinic acid, and then distilled under reduced pressure to obtain 66.1g of the product with a yield of 77%.

[0059] The reaction route is as follows:

[0060]

[0061] Among them, n is 50.

[0062] The structures of the modified hydrogenated silicone oils prepared in Examples 1-3 were characterized by nuclear magnetic resonance spectroscopy (NMR).

[0063] H NMR 1 H NMR spectral data and C NMR spectra 13 C NMR spectra were recorded on a Bruker AVANCE III 400 MHz instrument using TMS as the internal standard and deuterated chloroform as the solvent.

[0064] Since the structures of the modified hydrogenated silicone oils prepared in Examples 1-3 are similar, the H NMR spectra 1 H NMR and C NMR spectroscopy 13 C NMR is similar, therefore, the modified hydrogen-containing silicone oil prepared in Example 1 was subjected to hydrogen nuclear magnetic resonance spectroscopy. 1 HNMR and C NMR spectroscopy 13 C NMR description, nuclear magnetic resonance hydrogen spectrum 1 H NMR spectrum Figure 1 As shown, the carbon NMR spectrum 13 CNMR spectrum Figure 2 shown.

[0065] Among them, the characterization data of the modified hydrogenated silicone oil of Example 1 are:

[0066] 1H NMR (400MHz, Chloroform-d) δ3.37(t,J=8.2Hz,2H),3.01(d,J=6.8Hz,2H),1.71(m,1H),0.86(t,J=8.2Hz,2H),0.77(d,J=7.0Hz,6H),0.07--0.09(m,3H).

[0067] 13 C NMR (101MHz, CDCl3) δ77.02, 66.38, 28.06, 19.07, 1.41, 1.02, -0.02.

[0068] The raw hydrogenated silicone oil of Example 1 and the prepared modified hydrogenated silicone oil were subjected to infrared testing. Figure 3 This is the infrared spectrum of the modified hydrogenated silicone oil of Example 1 of the present invention. In the raw hydrogenated silicone oil, 2160 cm -1 The absorption peak of silicon-hydrogen bond is at 1075cm -1 The absorption peak of ether bond is shown in the figure. From raw material to product, silicon-hydrogen bond disappears and ether bond is generated. It can be judged that hydrogenated silicone oil and vinyl isobutyl ether undergo silylation reaction.

[0069] The performance test of the modified hydrogenated silicone oil prepared in Example 1 was carried out, wherein the viscosity test method comprises the following steps:

[0070] Add bath body to the bathtub until it is about 265mm into the bathtub;

[0071] Turn on the power switch and the instrument will enter normal working state. At this time, turn on the heating switch and set the temperature controller to the required temperature according to the sample needs; turn on the stirring switch to make the water temperature in the bathtub uniform.

[0072] Modified hydrogenated silicone oil samples containing water and mechanical impurities need to be dehydrated before testing and the mechanical impurities should be removed with filter paper. For lubricating oils with high viscosity, dehydration and filtration can also be performed by heating at 50°C or 100°C.

[0073] Before measuring the viscosity of the sample, the viscometer must be cleaned with solvent oil or petroleum ether. If the viscometer is dirty, wash it with chromic acid solution, water, distilled water or 95% ethanol in sequence, and then put it in an oven to dry or blow it dry with hot air filtered through cotton.

[0074] When measuring kinematic viscosity, load the sample into a clean and dry capillary viscometer. Before loading the sample, put the rubber tube on the branch tube and block the thick tube mouth of the tube body with your finger. At the same time, invert the viscometer and then insert the capillary body into the container containing the sample. At this time, use a rubber ball, water pump or other device to suck the liquid to the mark b (i.e. scale line 1). At the same time, be careful not to cause bubbles or cracks in the liquid in the expanded part of the tube body. When the liquid level reaches the mark b, lift the viscometer from the container and quickly return to normal. At the same time, wipe off the excess sample on the outer wall of the tube end of the capillary body, remove the rubber tube from the branch tube and put it on the capillary body.

[0075] Immerse the viscometer with the sample in a constant temperature bath, fix it to the bracket with a clamp and keep it vertical. The test temperature must be constant at ±0.1℃.

[0076] When measuring the viscosity at 40°C, the viscometer shall be kept in the constant temperature bath for no less than 20 minutes. When measuring the viscosity at 100°C, the viscometer shall be kept in the constant temperature bath for no less than 25 minutes.

[0077] After the constant temperature is maintained for a sufficient period of time, use the rubber tube covering the capillary viscometer to suck the sample into the expansion part so that the sample liquid level is higher than the mark a, and be careful not to allow bubbles or cracks to form in the liquid of the capillary and the expansion part.

[0078] At this time, observe the flow of the sample in the tube. When the liquid level just reaches the mark a (i.e., scale line 2), start the stopwatch. When the liquid level just flows to the mark b, where the mark b is higher than the mark a, stop the stopwatch. No bubbles should appear in the expansion part.

[0079] Repeat the measurement at least four times, and the difference between each flow time and its arithmetic mean should not exceed ±0.5% of the arithmetic mean. Take the arithmetic mean of at least three flow times as the average flow time of the sample.

[0080] At temperature t, the kinematic viscosity of the sample is υt (mm 2 / s) = c﹒ τt, where c is the viscometer constant, mm 2 / s 2 ; τt is the average flow time s of the sample.

[0081] The test results show that the viscosity of the modified hydrogenated silicone oil in Example 1 at 40°C is 375.0 mm 2 / s, the viscosity at 100°C is 88.2mm 2 / s, the viscosity index is 312, and the viscosity of the raw hydrogenated silicone oil at 40°C is 16.0 mm 2 / s, viscosity at 100°C is 6.4 mm 2 / s, the viscosity index is 426, and the viscosity index of the product is relatively large, indicating that its viscosity changes little with temperature, that is, its viscosity-temperature performance is relatively good; the pour point of the raw hydrogen-containing silicone oil is -49°C, and the pour point of the product modified hydrogen-containing silicone oil is -46°C. The pour points of both are relatively low and are suitable for low temperature environments; the antioxidant time of the raw hydrogen-containing silicone oil is 5min, and the antioxidant time of the product modified hydrogen-containing silicone oil is 260min. After modification, the antioxidant time of the product is greatly increased and the antioxidant property is greatly enhanced.

[0082] It should be noted that when the present invention involves a numerical range, it should be understood that the two endpoints of each numerical range and any value between the two endpoints can be selected. Since the steps and methods used are the same as those in the embodiments, in order to avoid redundancy, the present invention describes a preferred embodiment. Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0083] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant, characterized in that: The following steps are involved: In a protective gas atmosphere, hydrogen-containing silicone oil and a modifier vinyl alkyl ether are dissolved in a solvent, and a hydrosilylation reaction occurs in the presence of a transition metal catalyst and an inhibitor to obtain a silicone lubricant modified with vinyl alkyl ether grafted hydrogen-containing silicone oil.

2. The method for preparing a silicone lubricant modified by vinyl alkyl ether grafted hydrogen-containing silicone oil according to claim 1, characterized in that: The molar ratio of the silicon-hydrogen bond in the hydrogen-containing silicone oil to the olefin in the modifier vinyl alkyl ether is 1:0.5 to 1:

3.

3. The method for preparing the modified vinyl alkyl ether grafted hydrogen-containing silicone oil according to claim 1, characterized in that: The vinyl alkyl ether is vinyl isobutyl ether, vinyl ethyl ether, vinyl propyl ether, vinyl tert-butyl ether or vinyl isooctyl ether.

4. The method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant according to claim 1, characterized in that: The temperature of the hydrosilylation reaction is room temperature to 100° C., the reaction time is 5 h to 20 h, and the protective gas is nitrogen.

5. The method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant according to claim 1, characterized in that: The amount of the transition metal catalyst used is 0.05wt.% to 1wt.% of the mass of the hydrogen-containing silicone oil; the transition metal catalyst is selected from at least one of chloroplatinic acid catalyst, platinum catalyst, (Ph3P)4Pd, and (Ph3P)2NiCl2.

6. The method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant according to claim 1, characterized in that: The dosage of the polymerization inhibitor is 0.05wt.% to 1wt.% of the mass of the hydrogen-containing silicone oil; the polymerization inhibitor is at least one of hydroquinone, 2,6-di-tert-butyl-p-methylphenol, and p-chlorobenzoquinone.

7. The method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant according to claim 1, characterized in that: The hydrogen content of the hydrogen-containing silicone oil is 0.36wt.% to 1.6wt.%.

8. The method for preparing a vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant according to claim 1, characterized in that: The solvent is toluene or xylene.

9. An organosilicon lubricant modified with vinyl alkyl ether grafted hydrogen-containing silicone oil prepared by the preparation method according to any one of claims 1 to 8.

10. Use of the vinyl alkyl ether grafted hydrogen-containing silicone oil-modified organosilicon lubricant according to claim 9 in the preparation of gear oil.

Images