Oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer and its preparation and application

Abstract

The invention relates to the technical field of rubber elastomers and provides an oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer and its preparation and application. The functionalized hydrogenated styrene-butadiene rubber elastomer comprises epoxidized hydrogenated styrene-butadiene rubber obtained by introducing epoxy groups into styrene-butadiene rubber molecular chains and eliminating unsaturated carbon-carbon double bonds on the main chain. The preparation method comprises regulating the content of oxygen-containing functional groups in the styrene-butadiene rubber molecular chains to increase the polarity of the styrene-butadiene rubber, thereby improving the oil resistance of the styrene-butadiene rubber and enabling the styrene-butadiene rubber molecular chains containing epoxy functional groups to eliminate unsaturated double bonds in the molecular chains through a one-step hydrogenation reaction, thereby improving the aging resistance of the styrene-butadiene rubber and being gel-free. The elastomer can be used in relatively harsh environments and has greatly expanded application fields and usage ranges.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber elastomers, in particular to an oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer and its preparation and application. Background Art

[0002] Styrene-butadiene rubber (SBR) is a random copolymer formed by emulsion polymerization of butadiene and styrene monomers. The benzene rings in the chain segments give it excellent wear resistance and flex cracking resistance. However, due to the presence of carbon-carbon unsaturated double bonds in the chain segments, it has poor heat and aging resistance. Furthermore, the non-polar nature of SBR results in poor oil resistance. These drawbacks limit the application range of SBR.

[0003] Currently, to enhance the performance of styrene-butadiene rubber (SBR), common methods for modifying non-polar rubbers include epoxidation, chlorination, cyclization, and graft copolymerization. For example, epoxidation of natural rubber improves oil resistance by introducing polar epoxy groups. Styrene-butadiene-glycidyl methacrylate terpolymer (GMA-SBR) has been prepared via emulsion polymerization of styrene-butadiene rubber, improving the dispersion of silica in the composite, enhancing wear resistance, and reducing rolling resistance, thereby enhancing tire performance. However, these methods still suffer from harsh reaction conditions, numerous side reactions, and complex post-processing. Furthermore, the resulting modified rubber often only improves a single aspect of its performance, making it difficult to achieve a comprehensive suite of excellent properties.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The present invention provides an oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer and its preparation and application, so as to overcome the defect in the prior art that it is difficult to obtain a high-performance elastomer with oil resistance, heat resistance, aging resistance and excellent mechanical properties by simply modifying styrene-butadiene rubber. The preparation of a high-performance elastomer with oil resistance, heat resistance, aging resistance and excellent mechanical properties is achieved by hydrogenating epoxidized styrene-butadiene rubber under specific conditions.

[0006] The present invention provides a functionalized hydrogenated styrene-butadiene rubber elastomer, comprising: an epoxidized hydrogenated styrene-butadiene rubber having the following structural formula:

[0007]

[0008] In the formula, x, y, z and n are all positive integers; wherein, the values ​​of x, y, z and n depend on the structure of the styrene-butadiene rubber molecular chain used before functionalization, and the styrene-butadiene rubber used in the present invention includes but is not limited to SBR1502.

[0009] The present invention improves the oil resistance of styrene butadiene rubber by introducing epoxy groups into the styrene butadiene rubber molecular chain, and further eliminates the remaining unsaturated carbon-carbon double bonds on the main chain, so that the prepared epoxidized hydrogenated styrene butadiene rubber has oil resistance, aging resistance and excellent mechanical properties. Compared with the composite of hydrogenated styrene butadiene rubber and epoxidized styrene butadiene rubber, the material product is single and has a controllable structure, and the carbon-carbon double bonds are fully saturated, thereby extending the service life.

[0010] According to the functionalized hydrogenated styrene butadiene rubber elastomer provided by the present invention, the nuclear magnetic resonance hydrogen spectrum of the epoxidized hydrogenated styrene butadiene rubber has a characteristic peak of epoxy functional group at 2.7 ppm and no characteristic peak at 4.9-5.6 ppm.

[0011] Preferably, the epoxy functional group content in the epoxidized hydrogenated styrene-butadiene rubber is 5 to 30 mol%.

[0012] Through research, it was found that the content of epoxy functional groups is closely related to the comprehensive performance of functionalized hydrogenated styrene-butadiene rubber elastomers. When the epoxy functional group content is <5 mol%, the oil resistance is poor. When the epoxy functional group content is >30 mol%, the epoxy group will cause ring opening, thereby affecting the heat resistance of the material. At the same time, the ring opening reaction of the epoxy group is prone to produce cross-linked gel, thereby affecting the hydrogenation reaction and the processing performance of the material.

[0013] The present invention also provides a method for preparing the functionalized hydrogenated styrene-butadiene rubber elastomer as described above, comprising: adding a Grubbs-type catalyst and / or a Hoveyda-Grubbs-type catalyst to a rubber solution containing epoxidized styrene-butadiene rubber having an epoxidation degree of less than 35%, and introducing hydrogen to carry out a one-step hydrogenation reaction to obtain the epoxidized hydrogenated styrene-butadiene rubber without gel;

[0014] Grubbs-type catalysts such as Grubbs I catalyst, Grubbs II catalyst and Grubbs III catalyst;

[0015] Hoveyda-Grubbs type catalysts such as Hoveyda-Grubbs I catalyst and Hoveyda-Grubbs II catalyst;

[0016] Preferably the catalyst is a Hoveyda-Grubbs type catalyst.

[0017] In preparing the epoxidized hydrogenated styrene-butadiene rubber described above, the present invention has found that the order of the epoxidation reaction and the hydrogenation reaction is particularly important. If the hydrogenation reaction is carried out first, the catalyst used will have a negative effect on the epoxidation reaction, resulting in a large amount of gas being generated in the early stage of the epoxidation reaction and a large amount of gel being generated during the reaction. In addition, the epoxidation degree of the epoxidized styrene-butadiene rubber will also have a significant impact on the one-step hydrogenation reaction. If the epoxidation degree of the epoxidized styrene-butadiene rubber is too high, the one-step hydrogenation reaction will also produce a large amount of gel.

[0018] According to the preparation method of the functionalized hydrogenated styrene butadiene rubber elastomer provided by the present invention, the glue solution containing epoxidized styrene butadiene rubber with an epoxidation degree of less than 35% comprises: dissolving the epoxidized styrene butadiene rubber with an epoxidation degree of less than 35% in an organic solvent, wherein the organic solvent is one or more of toluene, xylene, chlorobenzene, n-hexane, petroleum ether and tetrahydrofuran;

[0019] Preferably, the mass concentration of the epoxidized styrene butadiene rubber in the rubber solution in which the epoxidized styrene butadiene rubber with an epoxidation degree less than 35% is dissolved is 1% to 15%, more preferably 5% to 10%.

[0020] According to the preparation method of the functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention, the preparation process of the epoxidized styrene-butadiene rubber comprises: adding peroxy acid (modifier) ​​to the rubber solution containing styrene-butadiene rubber for modification;

[0021] The peroxy acid is a mixture of a peroxide and an organic acid, the peroxide is one or more of hydrogen peroxide, potassium peroxide, zinc peroxide and peracetic acid, and the organic acid is one or more of formic acid, acetic acid, propionic acid, butyric acid, octanoic acid, benzoic acid, terephthalic acid, phthalic acid, stearic acid, palmitic acid and acrylic acid;

[0022] Preferably, the peroxy acid is a mixture of peroxide and organic acid in a molar ratio of (1-4):2, and the amount of peroxy acid used is 5% to 180% of the mass of the styrene-butadiene rubber;

[0023] More preferred is a combination of hydrogen peroxide and formic acid.

[0024] The present invention has found that by controlling the amount of peroxy acid used, the content of generated epoxy groups can be effectively controlled, thereby adjusting the polarity of styrene-butadiene rubber, and further making the obtained styrene-butadiene rubber elastomer have good oil resistance.

[0025] According to the preparation method of the functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention, the rubber solution containing styrene-butadiene rubber comprises: dissolving the styrene-butadiene rubber in an organic solvent, wherein the organic solvent is one or more of toluene, xylene, chlorobenzene, n-hexane, petroleum ether and tetrahydrofuran, which is more conducive to the dissolution of the styrene-butadiene rubber.

[0026] Preferably, the mass concentration of the styrene-butadiene rubber in the styrene-butadiene rubber solution is 1% to 15%, more preferably 5% to 10%. Studies have shown that controlling the concentration of the styrene-butadiene rubber solution within this range is more conducive to the stable progress of the modification reaction.

[0027] According to the preparation method of functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention, the temperature of the one-step hydrogenation reaction is room temperature to 200° C., the hydrogenation pressure is 2 to 8 MPa, and the reaction time is 0.5 to 12 hours.

[0028] According to the method for preparing the functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention, the amount of the catalyst added is 0.05 wt% to 2 wt% of the mass of the styrene-butadiene rubber.

[0029] The method for preparing the functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention further comprises: after the one-step hydrogenation reaction is completed, precipitating, washing, and drying the reaction product to obtain the epoxidized hydrogenated styrene-butadiene rubber.

[0030] Application of the functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention: The functionalized hydrogenated styrene-butadiene rubber elastomer prepared by the present invention can be used in products used in special environments, such as cable sheaths, chemical bushings, oil cylinder plugs, etc.

[0031] The present invention provides an oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer, which improves the oil resistance of the styrene-butadiene rubber by introducing epoxy groups into the styrene-butadiene rubber molecular chain, and further improves the heat resistance and aging resistance by eliminating the remaining unsaturated carbon-carbon double bonds on the main chain.

[0032] The present invention provides an oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer, which includes oxygen-containing functional groups and saturated molecular chain structures in a specific ratio. By regulating the content of oxygen-containing functional groups in the styrene-butadiene rubber molecular chain to increase the polarity of the styrene-butadiene rubber, the oil resistance of the styrene-butadiene rubber is improved, and at the same time, the unsaturated double bonds in the molecular chain of the styrene-butadiene rubber molecular chain containing epoxy functional groups can be eliminated through a one-step hydrogenation reaction, thereby improving the aging resistance of the styrene-butadiene rubber and being gel-free.

[0033] The present invention provides a method for preparing the above-mentioned oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer. By controlling the selection and dosage of the modifier during the epoxidation modification of the styrene-butadiene rubber, the stable progress of the epoxidation modification reaction is effectively controlled. A further hydrogenation step is performed to eliminate the remaining unsaturated carbon-carbon double bonds on the main chain, thereby obtaining an elastomer with a regular molecular chain, further improving the heat resistance and aging resistance.

[0034] The functionalized hydrogenated styrene-butadiene rubber elastomer prepared by the present invention does not contain gel, and the vulcanized rubber has excellent oil resistance, aging resistance and mechanical properties, can be used in relatively harsh environments, and the application field and use range are greatly expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 These are the H-NMR spectra of the functionalized hydrogenated styrene-butadiene rubber elastomers prepared in Examples 3 and 13 and conventional SBR.

[0037] Figure 2 These are the thermogravimetric curves of the functionalized hydrogenated styrene-butadiene rubber elastomer prepared in Example 5 and Example 11 and conventional SBR.

[0038] Figure 3 This is a comparison chart of the oil resistance of the functionalized hydrogenated styrene-butadiene rubber elastomer prepared in Example 10, Example 11, and Example 13 and Comparative Example 1. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0040] If no specific techniques or conditions are specified in the examples, the experiments were carried out according to the techniques or conditions described in the literature in the field or according to the product instructions. If no manufacturer is specified for the reagents or instruments used, they are all conventional products that can be purchased through regular channels.

[0041] In the following examples, the styrene-butadiene rubber used was emulsion polymer 1502.

[0042] The following combination Figure 1-Figure 3 The invention describes the preparation and application of the oil-resistant and aging-resistant functionalized hydrogenated styrene-butadiene rubber elastomer.

[0043] Example 1

[0044] A preparation method of epoxidized styrene butadiene rubber comprises the following steps: dissolving 10 g of styrene butadiene rubber in an organic solvent, xylene, to prepare a 7% solution; reacting the solution at 40° C. for 2 h in a molar ratio of carbon-carbon double bond: formic acid: hydrogen peroxide of 1:0.4:0.6; precipitating the solution with anhydrous ethanol, washing the solution, and drying the solution at 50° C. to obtain epoxidized styrene butadiene rubber containing polar groups. Detection shows that the epoxidation degree of the solution is 8.9% and the solution is gel-free.

[0045] Examples 2-3

[0046] A method for preparing epoxidized styrene-butadiene rubber is basically the same as Example 1, except that the reaction times are 4 h and 6 h respectively, and the epoxy degrees are 14.6% and 24.8% respectively, with no gel.

[0047] Example 4

[0048] A method for preparing epoxidized styrene butadiene rubber comprises dissolving 10 g of styrene butadiene rubber in an organic solvent, xylene, to prepare a 7% solution; reacting the solution at 40° C. for 6 hours with a molar ratio of carbon-carbon double bond: formic acid: hydrogen peroxide of 1:0.1:0.15; precipitating the solution with anhydrous ethanol, washing the solution, and drying the solution at 50° C. to obtain epoxidized styrene butadiene rubber containing polar groups, wherein the epoxidation degree is 7.8% and the solution is free of gel.

[0049] Examples 5-6

[0050] A method for preparing epoxidized styrene-butadiene rubber is substantially the same as that of Example 4, except that the molar ratios of carbon-carbon double bond:formic acid:hydrogen peroxide are 1:0.2:0.3 and 1:0.3:0.45, respectively. Detection shows that the epoxidation degrees are 12.4% and 17.6%, respectively, and both are gel-free.

[0051] Example 7

[0052] A method for preparing hydrogenated epoxidized styrene butadiene rubber comprises dissolving the epoxidized styrene butadiene rubber prepared in Example 4 in xylene to prepare a rubber solution with a mass fraction of 7%, taking 200 g of the rubber solution and placing it in a 500 mL reactor, adding 0.1 wt % of a Hoveyda-Grubbs II catalyst, reacting at 90° C. for 6 h under conditions of a pressure of 3 MPa and a rotation speed of 200 r / min, precipitating with anhydrous ethanol, washing, and drying at 50° C. to obtain hydrogenated epoxidized styrene butadiene rubber. Detection shows that the hydrogenation degree is 76.4% and there is no gel.

[0053] Examples 8 to 10

[0054] A method for preparing hydrogenated epoxidized styrene-butadiene rubber is substantially the same as that of Example 7, except that the amount of the hydrogenation catalyst Hoveyda-Grubbs II used is 0.2 wt%, 0.3 wt%, and 0.4 wt% of the mass of the styrene-butadiene rubber, respectively. The hydrogenation degrees are detected to be 84.3%, 92.2%, and 100.0%, respectively, and no gel is present.

[0055] Example 11

[0056] A method for preparing hydrogenated epoxidized styrene butadiene rubber comprises the following steps: dissolving the epoxidized styrene butadiene rubber prepared in Example 5 in xylene to prepare a rubber solution with a mass fraction of 7%, taking 200 g of the rubber solution and placing it in a 500 mL reactor, adding 0.4 wt % of a Hoveyda-Grubbs II catalyst, reacting at 90° C. for 6 h under conditions of a pressure of 3 MPa and a rotation speed of 200 r / min, precipitating with anhydrous ethanol, washing, and drying at 50° C. to obtain hydrogenated epoxidized styrene butadiene rubber. Detection shows that the hydrogenation degree is 100.0% and there is no gel.

[0057] Example 12

[0058] A method for preparing hydrogenated epoxidized styrene butadiene rubber comprises dissolving the epoxidized styrene butadiene rubber prepared in Example 6 in xylene to prepare a rubber solution with a mass fraction of 7%. 200 g of the rubber solution is placed in a 500 mL reactor and 0.4 wt % of a Hoveyda-Grubbs II catalyst is added. The mixture is reacted at 90° C. for 6 h under conditions of a pressure of 3 MPa and a rotation speed of 200 r / min. The mixture is precipitated with anhydrous ethanol, washed, and dried at 50° C. to obtain hydrogenated epoxidized styrene butadiene rubber. Detection shows that the hydrogenation degree is 100.0% and the rubber is gel-free.

[0059] Example 13

[0060] A method for preparing hydrogenated epoxidized styrene butadiene rubber comprises dissolving the epoxidized styrene butadiene rubber prepared in Example 3 in xylene to prepare a rubber solution with a mass fraction of 7%. 200 g of the rubber solution is placed in a 500 mL reactor and 0.4 wt % of a Hoveyda-Grubbs II catalyst is added. The mixture is reacted at 90° C. for 6 h under conditions of a pressure of 3 MPa and a rotation speed of 200 r / min. The mixture is precipitated with anhydrous ethanol, washed, and dried at 50° C. to obtain hydrogenated epoxidized styrene butadiene rubber. Detection shows that the hydrogenation degree is 100.0% and the rubber is gel-free.

[0061] Comparative Example 1

[0062] A method for preparing hydrogenated styrene butadiene rubber comprises the following steps: dissolving styrene butadiene rubber in xylene to prepare a rubber solution with a mass fraction of 7%, taking 200 g of the rubber solution and placing it in a 500 mL reactor, adding 0.3 wt % of a Hoveyda-Grubbs II catalyst, reacting at 90° C. for 6 h under conditions of a pressure of 3 MPa and a rotation speed of 200 r / min, precipitating with anhydrous ethanol, washing, and drying at 50° C. to obtain hydrogenated styrene butadiene rubber. Detection shows that the hydrogenation degree is 100.0% and there is no gel.

[0063] Comparative Example 2

[0064] A method for preparing modified styrene-butadiene rubber (SBR) comprises dissolving SBR in xylene to prepare a 7% by mass solution. 200 g of the solution is placed in a 500 mL reactor, and 0.2 wt% of a Hoveyda-Grubbs II catalyst is added. The reaction is carried out at 90°C for 6 hours under conditions of 3 MPa pressure and 200 rpm. The degree of hydrogenation is determined to be 88.5%. The solution is reacted at 40°C with a molar ratio of carbon-carbon double bond: formic acid: hydrogen peroxide of 1:0.1:0.15. The results indicate that a large amount of gas is generated initially, and a large amount of gel is formed during the reaction.

[0065] Comparative Example 3

[0066] A method for preparing modified styrene-butadiene rubber comprises dissolving 10 g of styrene-butadiene rubber in an organic solvent, xylene, to prepare a 7% solution; reacting the solution at 40° C. for 6 hours with a molar ratio of carbon-carbon double bond: formic acid: hydrogen peroxide of 1:0.6:0.9; precipitating the solution with anhydrous ethanol, washing the solution, and drying the solution at 50° C. to obtain epoxidized styrene-butadiene rubber containing polar groups. Detection shows that the epoxidation degree is 42.2% and the gel content is 63.1%.

[0067] The structural formula of the hydrogenated epoxidized styrene-butadiene rubber obtained in Examples 7 to 13 of the present invention is as follows:

[0068]

[0069] Wherein, x, y, z and n are all positive integers.

[0070] The properties of Examples 3 and 13 were compared with those of the emulsion-polymerized 1502 brand styrene-butadiene rubber; the mechanical properties were tested according to GB / T 528-2009; and the same batch of specimens were aged in a hot oxygen aging oven at 100° C. for 72 hours. The mechanical properties were tested according to GB / T 528-2009, and the retention rate was calculated, where retention rate = tensile strength after aging / tensile strength before aging × 100%. The test results are shown in the following table:

[0071]

[0072] According to the test results in the above table, it can be seen that the functionalized hydrogenated styrene-butadiene rubber elastomer provided by the present invention has higher tensile strength and better aging resistance.

[0073] The present invention further carries out the following test to the epoxidized hydrogenated styrene-butadiene rubber obtained:

[0074] like Figure 1As shown in the figure, the nuclear magnetic hydrogen spectra of the styrene-butadiene rubber elastomer prepared in Example 3 and Example 13 and the conventional SBR, it can be seen from the figure that: a new characteristic peak appears at 2.7 ppm, representing the chemical shift of the epoxy group; the peak representing the carbon-carbon double bond at 4.9-5.6 ppm disappears, proving that the method described in this example successfully realizes the epoxidation hydrogenation reaction.

[0075] like Figure 2 As shown in FIG, the thermogravimetric curves of the styrene-butadiene rubber elastomer prepared in Example 5 and Example 11 and conventional SBR are shown. It can be seen from the figure that the functionalized hydrogenated styrene-butadiene rubber provided by the present invention has good heat resistance.

[0076] like Figure 3 As shown, it is a comparison chart of the oil resistance of the styrene-butadiene rubber elastomer prepared in Example 10, Example 11, Example 13 and Comparative Example 1. It can be seen from the figure that the mass change rate of the functionalized hydrogenated styrene-butadiene rubber provided by the present invention is less than that of the hydrogenated styrene-butadiene rubber, that is, the oil resistance is significantly improved.

[0077] The functionalized hydrogenated styrene-butadiene rubber elastomer prepared by the present invention has excellent oil resistance, heat resistance and aging resistance, and can be used in products used in special environments, such as cable sheaths, chemical bushings, oil cylinder plugs, etc.

[0078] 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 various embodiments of the present invention.

Claims

1. A method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer, characterized in that: include: preparing epoxidized styrene-butadiene rubber with an epoxidation degree of less than 35%, adding a Grubbs-type catalyst and / or a Hoveyda-Grubbs-type catalyst to a rubber solution in which the epoxidized styrene-butadiene rubber with an epoxidation degree of less than 35% is dissolved, and introducing hydrogen to carry out a one-step hydrogenation reaction to obtain gel-free epoxidized hydrogenated styrene-butadiene rubber; The preparation process of the epoxidized styrene butadiene rubber comprises: adding peroxy acid to a rubber solution containing styrene butadiene rubber for modification; the peroxy acid is a mixture of peroxide and organic acid; The structural formula of the epoxidized hydrogenated styrene-butadiene rubber is as follows: ； Where x, y, z and n are all positive integers; The nuclear magnetic resonance hydrogen spectrum of the epoxidized hydrogenated styrene-butadiene rubber has a characteristic peak of epoxy functional group at 2.7 ppm, and the peak representing the carbon-carbon double bond at 4.9-5.6 ppm disappears; The epoxy functional group content in the epoxidized hydrogenated styrene-butadiene rubber is 5 to 30 mol%.

2. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 1, wherein: The catalyst is a Hoveyda-Grubbs type catalyst.

3. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 2, wherein: The glue solution containing epoxidized styrene-butadiene rubber with an epoxidation degree less than 35% comprises: dissolving the epoxidized styrene-butadiene rubber with an epoxidation degree less than 35% in an organic solvent, wherein the organic solvent is one or more of toluene, xylene, chlorobenzene, n-hexane, petroleum ether and tetrahydrofuran.

4. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 3, wherein: The mass concentration of the epoxidized styrene butadiene rubber in the rubber solution in which the epoxidized styrene butadiene rubber with an epoxidation degree less than 35% is dissolved is 1% to 15%.

5. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 4, wherein: The mass concentration of the epoxidized styrene butadiene rubber in the rubber solution in which the epoxidized styrene butadiene rubber with an epoxidation degree less than 35% is dissolved is 5% to 10%.

6. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to any one of claims 1 to 3, characterized in that: The peroxide is one or more of hydrogen peroxide, potassium peroxide, zinc peroxide and peracetic acid; the organic acid is one or more of formic acid, acetic acid, propionic acid, butyric acid, octanoic acid, benzoic acid, terephthalic acid, phthalic acid, stearic acid, palmitic acid and acrylic acid.

7. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 6, wherein: The peroxy acid is a mixture of peroxide and organic acid in a molar ratio of (1-4):2, and the amount of the peroxy acid is 5%-180% of the mass of the styrene-butadiene rubber.

8. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 7, wherein: The peroxy acid is a combination of hydrogen peroxide and formic acid.

9. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 6, wherein: The styrene-butadiene rubber-dissolving adhesive comprises: dissolving the styrene-butadiene rubber in an organic solvent, wherein the organic solvent is one or more of toluene, xylene, chlorobenzene, n-hexane, petroleum ether and tetrahydrofuran.

10. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 9, wherein: The mass concentration of styrene-butadiene rubber in the rubber solution containing styrene-butadiene rubber is 1% to 15%.

11. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 10, wherein: The mass concentration of styrene-butadiene rubber in the rubber solution containing styrene-butadiene rubber is 5% to 10%.

12. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to any one of claims 1 to 3, characterized in that: The temperature of the one-step hydrogenation reaction is room temperature to 200° C., the hydrogenation pressure is 2 to 8 MPa, and the reaction time is 0.5 to 12 h.

13. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 12, wherein: The amount of the catalyst added is 0.05wt% to 2wt% of the styrene-butadiene rubber.

14. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to any one of claims 1 to 5, 7 to 11, and 13, characterized in that: Also includes: After the one-step hydrogenation reaction is completed, the reaction product is precipitated, washed, and dried to obtain the epoxidized hydrogenated styrene-butadiene rubber.

15. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 6, wherein: Also includes: After the one-step hydrogenation reaction is completed, the reaction product is precipitated, washed, and dried to obtain the epoxidized hydrogenated styrene-butadiene rubber.

16. The method for preparing a functionalized hydrogenated styrene-butadiene rubber elastomer according to claim 12, wherein: Also includes: After the one-step hydrogenation reaction is completed, the reaction product is precipitated, washed, and dried to obtain the epoxidized hydrogenated styrene-butadiene rubber.

Images