阅读说明：本技术 一种氢化高顺式聚异戊二烯及其制备方法和其在润滑油粘指剂中的应用 (Hydrogenated high cis-polyisoprene, preparation method thereof and application thereof in lubricating oil finger-sticking agent ) 是由 王庆刚 杨伟颖 王亮 匡佳 周丽 于 2021-08-10 设计创作，主要内容包括：一种氢化高顺式聚异戊二烯及其制备方法和其在润滑油粘指剂中的应用。本发明属于润滑油添加剂领域。本发明为解决现有润滑油粘指剂的生产过程步骤繁琐、条件苛刻且不可控的技术问题。本发明的氢化高顺式聚异戊二烯的制备方法按以下步骤进行：步骤一、采用吡啶亚胺铁络合物催化异戊二烯配位聚合制备不同比例3,4-结构和不同分子量的聚异戊二烯；步骤二、将聚异戊二烯用有机溶剂溶解后,加入Ca(OH)-(2)搅拌过夜,过滤后收集滤液,除去溶剂,得到除杂的聚异戊二烯；步骤三、将除杂的聚异戊二烯加入到溶剂中,于高压反应釜内在过渡金属催化剂和氢气作用下,于高温高压进行反应,得到氢化高顺式聚异戊二烯。本发明的氢化高顺式聚异戊二烯作为润滑油粘指剂应用。(Hydrogenated high cis-polyisoprene, a preparation method thereof and application thereof in a lubricating oil finger-sticking agent. The invention belongs to the field of lubricating oil additives. The invention aims to solve the technical problems of complicated steps, harsh conditions and uncontrollable in the production process of the conventional lubricating oil finger adhesive. Production of hydrogenated high cis-polyisoprene according to the present inventionThe preparation method comprises the following steps: step one, preparing polyisoprene with different proportions of 3, 4-structures and different molecular weights by catalyzing isoprene to perform coordination polymerization by using a pyridine imine iron complex; step two, dissolving polyisoprene in organic solvent, adding Ca (OH) 2 Stirring overnight, filtering, collecting filtrate, and removing solvent to obtain impurity-removed polyisoprene; and step three, adding the purified polyisoprene into a solvent, and reacting in a high-pressure reaction kettle at high temperature and high pressure under the action of a transition metal catalyst and hydrogen to obtain the hydrogenated high cis-polyisoprene. The hydrogenated high cis polyisoprene provided by the invention is applied as a lubricant finger-sticking agent.)

1. A hydrogenated high cis-polyisoprene characterized in that it has a number average molecular weight M_n6.0-30.0 ten thousand, and the molecular weight distribution is 1.78-2.95, wherein the proportion of 1,4 structure is 70-99%, the proportion of 3, 4-structure is 1-30%, and the hydrogenation degree is 80-100%.

2. The process for preparing a hydrogenated high cis-polyisoprene according to claim 1, wherein the process comprises the steps of:

step one, preparing polyisoprene with different proportions of 3, 4-structures and different molecular weights by catalyzing isoprene to perform coordination polymerization by using a pyridine imine iron complex;

step two, dissolving the polyisoprene obtained in the step one by using an organic solvent, and adding Ca (OH)₂Stirring overnight, filtering, collecting filtrate, and removing solvent to obtain impurity-removed polyisoprene;

and step three, adding the purified polyisoprene into a solvent, and reacting in a high-pressure reaction kettle under the action of a transition metal catalyst and hydrogen under the conditions of high temperature and high pressure to obtain the hydrogenated high cis-polyisoprene.

3. The method for preparing hydrogenated high cis-polyisoprene according to claim 2, wherein the specific process for preparing polyisoprene with different ratio of 3, 4-structure and different molecular weight by coordination polymerization of isoprene catalyzed by pyridine imine iron complex in step one is as follows:

under the anhydrous and anaerobic condition, adding a pyridine imine iron complex, a cocatalyst, a conjugated diene monomer and a solvent into a reactor to form a reaction system, polymerizing for 5min to 120min at the temperature of between 40 ℃ below zero and 50 ℃ under the stirring condition, then adding a quencher and an anti-aging agent into the reaction system to quench and react, repeatedly washing with ethanol, separating and purifying to obtain the polyisoprene.

4. The method of claim 3, wherein the pyridine imine iron complex is of any one of the following structures:

the molar ratio of the conjugated diene monomer to the iron element in the pyridine imine iron complex is (2000-10000): 1, the cocatalyst is any one of MAO, MMAO and DMAO, and the molar ratio of the aluminum element in the cocatalyst to the iron element in the pyridine imine iron complex is (20-1000): 1.

5. The method for preparing hydrogenated high cis-polyisoprene according to claim 2, wherein the organic solvent in step two is any one of dichloromethane, tetrahydrofuran, acetone and acetonitrile, and the mass ratio of polyisoprene to organic solvent in step two is 1: (20-200) the polyisoprene obtained in the second step is mixed with Ca (OH)₂The mass ratio of (1): (0.5 to 10).

6. The method for preparing hydrogenated high cis-polyisoprene according to claim 5, wherein the mass ratio of polyisoprene to organic solvent in step two is 1: 50, step two said polyisoprene with Ca (OH)₂The mass ratio of (1): 2.

7. the method for preparing hydrogenated high cis-polyisoprene according to claim 2, wherein the transition metal catalyst in step three is Raney nickel, palladium carbon or tris (triphenylphosphine) rhodium chloride, and the mass ratio of the purified polyisoprene to the transition metal catalyst in step three is 1: (1.8-2.2), wherein the introduction amount of the hydrogen in the third step is to ensure that the pressure in the high-pressure reaction kettle is 5-15 MPa, the high temperature in the third step is 120-200 ℃, and the high pressure is 5-15 MPa.

8. Use of the hydrogenated high cis polyisoprene according to any one of claims 2-7, wherein the hydrogenated high cis polyisoprene is used as a lubricant oil finger adhesive.

9. The use of the hydrogenated high cis polyisoprene according to claim 8, wherein the specific steps of the use of the hydrogenated high cis polyisoprene as a lubricant finger adhesive are as follows:

and mixing the hydrogenated high cis-polyisoprene with the base oil 150N, and stirring until the mixture is dissolved to obtain the lubricating oil containing the hydrogenated polyisoprene adhesive.

10. The use of the hydrogenated high-cis polyisoprene according to claim 9, wherein the mass ratio of the hydrogenated high-cis polyisoprene to the base oil 150N is (0.1-5): 100.

Technical Field

The invention belongs to the field of lubricating oil additives, and particularly relates to hydrogenated high-cis polyisoprene, a preparation method thereof and application thereof in a lubricating oil finger-sticking agent.

Background

With the rapid development of the automobile industry, the engine develops towards high rotating speed and high power, and the use working condition of the engine is more and more rigorous, which puts higher and higher requirements on lubricating oil for the engine. In recent years, engine oils have been made to have multiple stages in order to ensure excellent viscosity-temperature performance of lubricating oils. The viscosity index improver (a finger-sticking agent for short) is one of indispensable additives of multistage engine oil, can greatly improve the viscosity-temperature performance of lubricating oil, reduce fuel consumption, simplify oil products and realize oil product generalization, and the used amount of the viscosity index improver accounts for 22.51 percent of the total additives of the lubricating oil.

As early as the 30 s of the 20 th century, Polymethacrylate (PMA) is added to military gear oil and aviation hydraulic oil to enlarge the temperature range of lubricating oil, and the PMA has excellent viscosity-temperature performance, but poor thickening capacity and large using amount. Polyisobutylene (PIB) was subsequently developed, which has good shear stability and thickening ability, is inexpensive, but has poor low temperature properties and cannot be formulated into medium to high grade multigrade internal combustion engine oils. In the end of the 60 s, an ethylene propylene copolymer (OCP) was developed, which has easily available raw materials and good comprehensive performance, but the structure of the ethylene propylene copolymer is uncontrollable in the production process, and the produced viscosity index improver is unstable. In the early 70 s, people developed hydrogenated styrene-diene copolymer (HSD), and due to the fact that HSD has high thickening capacity, shear stability and low-temperature performance, when lubricating oil with the same viscosity grade is prepared, the dosage is small, the preparation mode is flexible, but due to the fact that the production process of HSD is complex, at present, production and application are not achieved at home basically.

HSD and OCP are two viscosity index improvers with great research value and application prospect, but the development of the viscosity index improvers is limited by uncontrollable and complicated harsh production processes. Therefore, the development of a novel viscosity index improver with excellent performance and industrial development prospect has important significance and broad prospect. Hydrogenated polyisoprene (HPIP) with different branched chain degrees can be obtained by hydrogenating polyisoprene with different content of 3, 4-structures, the structure of the polyisoprene is similar to HSD at high content of 3, 4-structures, and the structure of the polyisoprene is similar to OCP adhesive at low content of 3, 4-structures. Therefore, the hydrogenated polyisoprene with proper molecular weight and 3, 4-structure content is developed and used as the viscosity index improver in the field of lubricating oil additives, and has both fundamental theory research significance and industrial development prospect.

Disclosure of Invention

The invention provides hydrogenated high cis-polyisoprene, a preparation method thereof and application thereof in a lubricating oil finger-sticking agent, aiming at solving the technical problems of complicated production process steps, harsh conditions and uncontrollable in the existing lubricating oil finger-sticking agent.

The number average molecular weight M of the hydrogenated high cis-polyisoprene_n6.0-30.0 ten thousand, and the molecular weight distribution is 1.78-2.95, wherein the proportion of 1,4 structure is 70-99%, the proportion of 3, 4-structure is 1-30%, and the hydrogenation degree is 80-100%.

The preparation method of the hydrogenated high cis-polyisoprene provided by the invention comprises the following steps:

step one, preparing polyisoprene with different proportions of 3, 4-structures and different molecular weights by catalyzing isoprene to perform coordination polymerization by using a pyridine imine iron complex;

step two, dissolving the polyisoprene obtained in the step one by using an organic solvent, and adding Ca (OH)₂Stirring overnight, filtering, collecting filtrate, and removingSolvent to obtain polyisoprene without impurities;

and step three, adding the purified polyisoprene into a solvent, and reacting in a high-pressure reaction kettle under the action of a transition metal catalyst and hydrogen under the conditions of high temperature and high pressure to obtain the hydrogenated high cis-polyisoprene.

Further limiting, the specific process for preparing the polyisoprenes with different ratios of 3, 4-structures and different molecular weights by using the pyridine imine iron complex to catalyze the isoprene coordination polymerization in the step one is as follows:

under the anhydrous and anaerobic condition, adding a pyridine imine iron complex, a cocatalyst, a conjugated diene monomer and a solvent into a reactor to form a reaction system, polymerizing for 5min to 120min at the temperature of between 40 ℃ below zero and 50 ℃ under the stirring condition, then adding a quencher and an anti-aging agent into the reaction system to quench and react, repeatedly washing with ethanol, separating and purifying to obtain the polyisoprene.

Further defined, the pyridine imine iron complex is any one of the following structures:

further, the molar ratio of the conjugated diene monomer to the iron element in the pyridine imine iron complex is (2000-10000): 1.

Further, the cocatalyst is any one of MAO (methylaluminoxane), MMAO (modified methylaluminoxane) and DMAO (dried methylaluminoxane).

Further, the molar ratio of the aluminum element in the cocatalyst to the iron element in the pyridine imine iron complex is (20-1000): 1.

In the second step, the organic solvent is any one of dichloromethane, tetrahydrofuran, acetone and acetonitrile.

Further limiting, in the second step, the mass ratio of the polyisoprene to the organic solvent is 1: (20-200).

Further limiting, in the second step, the mass ratio of the polyisoprene to the organic solvent is 1: 50.

further defined, in step two the polyisoprene is reacted with Ca (OH)₂The mass ratio of (1): (0.5 to 10).

Further defined, in step two the polyisoprene is reacted with Ca (OH)₂The mass ratio of (1): 2.

further limiting, in the third step, the transition metal catalyst is raney nickel, palladium carbon or tris (triphenylphosphine) rhodium chloride.

Further limiting, the mass ratio of the impurity-removed polyisoprene to the transition metal catalyst in the step three is 1: (1.8-2.2).

Further limiting, the introduction amount of the hydrogen in the step three is to ensure that the pressure in the high-pressure reaction kettle is between 5 and 15 MPa.

Further limiting, the high temperature in the third step is 120-200 ℃, and the high pressure is 5-15 MPa.

The invention relates to application of hydrogenated high cis-polyisoprene as a lubricating oil finger-sticking agent.

Further limiting, the specific steps of the application of the hydrogenated high cis-polyisoprene as a lubricant finger-sticking agent are as follows:

and mixing the hydrogenated high cis-polyisoprene with the base oil 150N, and stirring until the mixture is dissolved to obtain the lubricating oil containing the hydrogenated polyisoprene adhesive.

Further limiting, the mass ratio of the hydrogenated high-cis polyisoprene to the base oil 150N is (0.1-5): 100.

compared with the prior art, the invention has the following remarkable effects:

1. the production operation of the invention is controllable and simple: compared with the traditional process for producing the viscosity index improver by the ethylene-propylene copolymer, the process has the advantages of more controllable molecular weight and microstructure of a polymer structure and more stable product quality.

2. The cost is lower: the process adopts the iron catalyst which is environment-friendly and low in price to prepare the polyisoprene, obtains the viscosity index improver through hydrogenation of Raney nickel, and has good industrial value.

3. The viscosity index improver produced by the invention is used as an additive according to different proportions, is added into 150N base oil, has excellent performance after the test of the physical and chemical indexes of the product, and can meet the use requirement of the viscosity index improver, after the hydrogenated isoprene adhesive is added, the viscosity-temperature index of lubricating oil is between 120 and 200, the shear stability value is between 15 and 30, the oxidation resistance value is between 30 and 50min, the cloud point is between-20 and 0 ℃, and the pour point is between-20 and-30 ℃.

Drawings

FIG. 1 is a hydrogen spectrum of the hydrogenated high cis polyisoprene HPIP-1 obtained in example 1.

Detailed Description

Example 1, a method of preparing hydrogenated high cis polyisoprene according to this example was carried out as follows:

the method comprises the following steps: to a 500mL Schlenk tube, pyridinimine iron complex 1(76mg,200 μmol), anhydrous toluene (250mL), isoprene (40.00mL,400.0mmol), MAO (100mmol, 500eq) were added in this order under an argon atmosphere, polymerized at-20 ℃ for 60min, then quenched with 200mL of a mixed solution of methanol and hydrochloric acid (MeOH/HCl vol ratio ═ 50/1) and 20mL of an ethanol solution of 2, 6-di-tert-butyl-4-methylphenol having a mass concentration of 1%, washed three times with ethanol, and dried in a vacuum oven at 40 ℃ to constant weight to give polyisoprene; through detection, the reaction yield of the step is as follows: 89% of the polyisoprene obtained had a number average molecular weight (M)_n)：13.2×10⁴Molecular weight distribution (PDI): 2.43, the proportion of different structures: the cis-1, 4-structure accounts for 82 percent, and the 3, 4-structure accounts for 18 percent;

step two, 30g of polyisoprene was dissolved in 1500g of methylene chloride, and 60g of Ca (OH) was added after the dissolution₂Stirred overnight at room temperature, Ca (OH) was removed by centrifugation₂Collecting the filtrate, and spin-drying to remove the solvent to obtain white transparent polymer, i.e. the purified polyisoprene;

step three, adding 25g of impurity-removed polyisoprene into 500mL of n-heptane, reacting in a high-pressure reaction kettle for 18h at the temperature of 170 ℃ and under the pressure of 50g of Raney nickel and 8Mpa hydrogen, filtering to remove the catalyst after the reaction is finished, collecting the filtrate and spin-drying the solvent to obtain a white transparent polymer (namely hydrogenated polyisoprene), wherein the mark is HPIP-1;

as a result: the degree of Hydrogenation (HD) > 99% of HPIP-1.

Example 2, a method of preparing hydrogenated high cis polyisoprene according to this example was performed as follows:

the method comprises the following steps: to a 500mL Schlenk tube, pyridinimine iron complex 2(74mg,200 μmol), anhydrous toluene (250mL), isoprene (40.00mL,400.0mmol), MAO (100mmol, 500eq) were sequentially added under an argon atmosphere, polymerized at-20 ℃ for 60min, then quenched with 200mL of a mixed solution of methanol and hydrochloric acid (MeOH/HCl vol ratio ═ 50/1) and 20mL of an ethanol solution of 2, 6-di-tert-butyl-4-methylphenol having a mass concentration of 1%, washed three times with ethanol, and dried in a vacuum oven at 40 ℃ to constant weight to give polyisoprene; through detection, the reaction yield of the step is as follows: 90% of the polyisoprene obtained has a number average molecular weight (M)_n)：7.2×10⁴Molecular weight distribution (PDI): 2.06, the proportion of different structures: the cis-1, 4-structure accounts for 76%, and the 3, 4-structure accounts for 24%;

step two, 30g of polyisoprene was dissolved in 1500g of methylene chloride, and 60g of Ca (OH) was added after the dissolution₂Stirred overnight at room temperature, Ca (OH) was removed by centrifugation₂Collecting the filtrate, and spin-drying to remove the solvent to obtain white transparent polymer, i.e. the purified polyisoprene;

step three, adding 25g of impurity-removed polyisoprene into 500mL of n-heptane, reacting in a high-pressure reaction kettle for 18h at the temperature of 170 ℃ and under the pressure of 50g of Raney nickel and 8Mpa hydrogen, filtering to remove the catalyst after the reaction is finished, collecting the filtrate and spin-drying the solvent to obtain a white transparent polymer (namely hydrogenated polyisoprene), and marking the white transparent polymer as HPIP-2;

as a result: the degree of Hydrogenation (HD) of HPIP-2 is > 99%.

Example 3, a method of preparing hydrogenated high cis polyisoprene according to this example was performed as follows:

the method comprises the following steps: to a 500mL Schlenk tube, under an argon atmosphere, was added sequentially pyridinimine iron complex 3(74mg, 200. mu. mol), anhydrous toluene (250mL), isoprene (40.00mL,40 mL)0.0mmol), MAO (100mmol, 500eq), polymerized at-20 ℃ for 60min, then quenched with 200mL of a mixed solution of methanol and hydrochloric acid (MeOH/HCl vol. ratio: 50/1) and 20mL of a 1% by mass solution of 2, 6-di-tert-butyl-4-methylphenol in ethanol, washed three times with ethanol, and dried to constant weight in a vacuum oven at 40 ℃ to give polyisoprene; through detection, the reaction yield of the step is as follows: 90% of the polyisoprene obtained has a number average molecular weight (M)_n)：12.3×10⁴Molecular weight distribution (PDI): 2.25, the proportion of different structures: the cis-1, 4-structure accounts for 76%, and the 3, 4-structure accounts for 24%;

step two, 30g of polyisoprene was dissolved in 1500g of methylene chloride, and 60g of Ca (OH) was added after the dissolution₂Stirred overnight at room temperature, Ca (OH) was removed by centrifugation₂Collecting the filtrate, and spin-drying to remove the solvent to obtain white transparent polymer, i.e. the purified polyisoprene;

step three, adding 25g of impurity-removed polyisoprene into 500mL of n-heptane, reacting in a high-pressure reaction kettle for 18h at the temperature of 170 ℃ and under the pressure of 50g of Raney nickel and 8Mpa hydrogen, filtering to remove the catalyst after the reaction is finished, collecting the filtrate and spin-drying the solvent to obtain a white transparent polymer (namely hydrogenated polyisoprene), wherein the mark is HPIP-3;

as a result: the degree of Hydrogenation (HD) of HPIP-3 is > 99%.

Example 4, the preparation of hydrogenated high cis polyisoprene according to this example was carried out as follows:

the method comprises the following steps: to a 500mL Schlenk tube, pyridinimine iron complex 4(92mg,200 μmol), anhydrous toluene (250mL), isoprene (40.00mL,400.0mmol), MAO (100mmol, 500eq) were sequentially added under an argon atmosphere, polymerized at-20 ℃ for 60min, then quenched with 200mL of a mixed solution of methanol and hydrochloric acid (MeOH/HCl vol ratio ═ 50/1) and 20mL of an ethanol solution of 2, 6-di-tert-butyl-4-methylphenol having a mass concentration of 1%, washed three times with ethanol, and dried in a vacuum oven at 40 ℃ to constant weight to give polyisoprene; the detection shows that the reaction yield of the step is more than 99 percent, and the number average molecular weight (M) of the obtained polyisoprene_n)：2.0×10⁵Molecular weight distribution (PDI): 2.02, aThe proportion of the same structure is as follows: cis-1, 4-structure accounts for 85%, trans-1, 4-structure accounts for 6%, and 3, 4-structure accounts for 9%;

step two, 30g of polyisoprene was dissolved in 1500g of methylene chloride, and 60g of Ca (OH) was added after the dissolution₂Stirred overnight at room temperature, Ca (OH) was removed by centrifugation₂Collecting the filtrate, and spin-drying to remove the solvent to obtain white transparent polymer, i.e. the purified polyisoprene;

step three, adding 25g of impurity-removed polyisoprene into 500mL of n-heptane, reacting in a high-pressure reaction kettle for 18h at the temperature of 170 ℃ and under the pressure of 50g of Raney nickel and 8Mpa hydrogen, filtering to remove the catalyst after the reaction is finished, collecting the filtrate and spin-drying the solvent to obtain a white transparent polymer (namely hydrogenated polyisoprene), wherein the white transparent polymer is marked as HPIP-4;

as a result: the degree of Hydrogenation (HD) of HPIP-4 was 96%.

Example 5, the preparation of hydrogenated high cis polyisoprene according to this example was carried out as follows:

the method comprises the following steps: to a 500mL Schlenk tube, pyridinimine iron complex 5(82mg,200 μmol), anhydrous toluene (250mL), isoprene (40.00mL,400.0mmol), MAO (100mmol, 500eq) were sequentially added under an argon atmosphere, polymerized at-20 ℃ for 60min, then quenched with 200mL of a mixed solution of methanol and hydrochloric acid (MeOH/HCl vol ratio ═ 50/1) and 20mL of an ethanol solution of 2, 6-di-tert-butyl-4-methylphenol having a mass concentration of 1%, washed three times with ethanol, and dried in a vacuum oven at 40 ℃ to constant weight to give polyisoprene; the detection shows that the reaction yield of the step is more than 99 percent, and the number average molecular weight (M) of the obtained polyisoprene_n)：2.4×10⁵Molecular weight distribution (PDI): 1.72, the proportion of different structures: the cis-1, 4-structure accounts for 92%, and the 3, 4-structure accounts for 8%;

step two, 30g of polyisoprene was dissolved in 1500g of methylene chloride, and 60g of Ca (OH) was added after the dissolution₂Stirred overnight at room temperature, Ca (OH) was removed by centrifugation₂Collecting the filtrate, and spin-drying to remove the solvent to obtain white transparent polymer, i.e. the purified polyisoprene;

step three, adding 25g of impurity-removed polyisoprene into 500mL of n-heptane, reacting in a high-pressure reaction kettle for 18h at the temperature of 170 ℃ and under the pressure of 50g of Raney nickel and 8Mpa hydrogen, filtering to remove the catalyst after the reaction is finished, collecting the filtrate and spin-drying the solvent to obtain a white transparent polymer (namely hydrogenated polyisoprene), wherein the mark is HPIP-5;

as a result: the degree of Hydrogenation (HD) of HPIP-5 was 95%.

Example 6, a method of preparing hydrogenated high cis polyisoprene according to this example was performed as follows:

the method comprises the following steps: to a 500mL Schlenk tube, pyridinimine iron complex 6(78mg,200 μmol), anhydrous toluene (250mL), isoprene (40.00mL,400.0mmol), MAO (100mmol, 500eq) were sequentially added under an argon atmosphere, polymerized at-20 ℃ for 60min, then quenched with 200mL of a mixed solution of methanol and hydrochloric acid (MeOH/HCl vol ratio ═ 50/1) and 20mL of an ethanol solution of 2, 6-di-tert-butyl-4-methylphenol having a mass concentration of 1%, washed three times with ethanol, and dried in a vacuum oven at 40 ℃ to constant weight to give polyisoprene; the detection shows that the reaction yield of the step is more than 99 percent, and the number average molecular weight (M) of the obtained polyisoprene_n)：2.3×10⁵Molecular weight distribution (PDI): 1.71. the proportion of different structures: cis-1, 4-structure accounts for 81%, 3, 4-structure accounts for 19%;

step two, 30g of polyisoprene was dissolved in 1500g of methylene chloride, and 60g of Ca (OH) was added after the dissolution₂Stirred overnight at room temperature, Ca (OH) was removed by centrifugation₂Collecting the filtrate, and spin-drying to remove the solvent to obtain white transparent polymer, i.e. the purified polyisoprene;

step three, adding 25g of impurity-removed polyisoprene into 500mL of n-heptane, reacting in a high-pressure reaction kettle for 18h at the temperature of 170 ℃ and under the pressure of 50g of Raney nickel and 8Mpa hydrogen, filtering to remove the catalyst after the reaction is finished, collecting the filtrate and spin-drying the solvent to obtain a white transparent polymer (namely hydrogenated polyisoprene), and marking the white transparent polymer as HPIP-6;

as a result: the degree of Hydrogenation (HD) of HPIP-6 was 94%.

Example 7 hydrogenated polyisoprene obtained in examples 1 to 6 was added to 150N base oil in a mass fraction of 1%, and dissolved by stirring to obtain a lubricating oil containing a hydrogenated polyisoprene adhesive.

The performance test of the obtained lubricant containing the finger-sticking agent was carried out, and the results are shown in Table 1.

TABLE 1 lubricating oil Properties

	HPIP-1	HPIP-2	HPIP-3	HPIP-4	HPIP-5	HPIP-6
							Appearance of the product	Clear and transparent	Clear and transparent	Clear and transparent	Clear and transparent	Clear and transparent	Clear and transparent
Kinematic viscosity (40 ℃ C.) mm2/s	48.11	46.89	52.96	66.72	133.9	107.7
							Kinematic viscosity (100 ℃ C.) mm2/s	7.59	7.68	8.32	10.03	21.5	16.23
Viscosity index	123	131	130	135	188	162
							Shear stability index (%)	28	20	25	27	30	28
Cloud Point (. degree.C.)	-14	-14	0	-3	-3	-9
							Pour point (. degree. C.)	-26	-30	-29	-33	-20	-20
Loss of evaporation (%)	4.1	4.4	4.1	4.1	4.2	4.1
							Rotating oxygen bomb method (150 deg.C), min	32	40	32	35	30	30