A self-crosslinking hydrogen bromide butyl nitrile rubber, a preparation method and application thereof

Abstract

The present application relates to the technical field of high-performance elastomer material preparation, and particularly relates to a self-crosslinking hydrogen bromide hydrogenated butyl rubber, a preparation method and application thereof. The self-crosslinking hydrogen bromide hydrogenated butyl rubber contains allyl bromine functional groups, and the content of the allyl bromine functional groups is 0.01-10 mol%. The self-crosslinking hydrogen bromide hydrogenated butyl rubber provided by the present application exhibits good self-crosslinking performance, has excellent mechanical properties, good heat resistance, improved aging resistance and oil resistance, and excellent comprehensive performance. The preparation method of the self-crosslinking hydrogen bromide hydrogenated butyl rubber provided by the present application effectively controls the stability of the reaction by adjusting the reaction conditions, and hydrogen bromide hydrogenated butyl rubber with a certain bromination rate is obtained. The self-crosslinking hydrogen bromide hydrogenated butyl rubber obtained by the present application is expected to be widely applied in the fields of automobiles, oil drilling, aerospace and new energy.

Description

Technical Field

[0001] This invention relates to the field of high-performance elastomer material preparation technology, specifically to a self-crosslinking hydrogen brominated nitrile butadiene rubber, its preparation method, and its application. Background Technology

[0002] Hydrogenated nitrile butadiene rubber (HNBR) is a type of rubber prepared by hydrogenating the carbon-carbon double bonds in the molecular chain of nitrile butadiene rubber. As a rubber with excellent comprehensive properties, the polar nitrile groups in the HNBR molecular chain provide the rubber with excellent oil resistance, corrosion resistance, and high tensile strength, while the saturated and ordered ethylene structure provides the rubber with high thermal stability and ozone resistance.

[0003] To further optimize the properties of hydrogenated nitrile butadiene rubber (HNBR), a chemical modification method involving grafting a third monomer can be employed. Furthermore, traditional rubber crosslinking methods primarily utilize sulfur and peroxides as crosslinking agents. Since HNBR molecules contain very few carbon-carbon double bonds, peroxide crosslinking is mainly used. This results in rubber with good heat resistance and aging resistance, but its strength is relatively lower than that of sulfur-crosslinked rubber. Moreover, in some practical applications where vulcanizing agents cannot be added for crosslinking, the application of HNBR is limited. Therefore, finding a crosslinking method for HNBR is highly significant for further expanding its applications. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a self-crosslinking hydrogen brominated nitrile butadiene rubber, its preparation method, and its application.

[0005] The first aspect of the present invention provides a self-crosslinking hydrogen brominated nitrile butadiene rubber, wherein the self-crosslinking hydrogen brominated nitrile butadiene rubber contains allyl bromine functional groups, and the content of the allyl bromine functional groups is 0.01 to 10 mol.

[0006] In this invention, the self-crosslinking hydrogenated brominated nitrile butadiene rubber exhibits excellent self-crosslinking properties and superior mechanical properties. Simultaneously, its heat resistance, aging resistance, and oil resistance are improved, resulting in excellent overall performance. It is expected to find wide application in the automotive, oilfield drilling, aerospace, and new energy fields. Furthermore, the allyl bromide functional group is a polar and reactive group, which can serve as a reaction intermediate, providing possibilities for further reactions to prepare different modified hydrogenated nitrile butadiene rubbers.

[0007] According to this invention, the α-hydrogen atoms in the carbon-carbon double bonds of the HNBR molecular chain are replaced with bromine atoms, introducing an allyl bromide functional group. Firstly, the allyl bromide functional group, as a highly polar and reactive group, exhibits strong intermolecular interactions and significantly influences the tensile strength, tear strength, and adhesive properties of the rubber. Secondly, the allyl bromide functional group can also be used to modify HNBR by introducing different types of atoms or groups through oxidation, substitution, and metathesis reactions, thus preparing various types of modified hydrogenated nitrile butadiene rubbers as needed.

[0008] Preferably, the allyl bromide functional group content is 0.1–7.0 mol%, more preferably 0.1–5.0 mol%.

[0009] The self-crosslinking hydrogenated brominated nitrile butadiene rubber provided by this invention is made by grafting different proportions of bromine functional groups onto the main chain of hydrogenated nitrile butadiene rubber, exhibiting excellent self-crosslinking properties. Its tensile strength can reach 22.5 MPa, tear strength 80.0 kN / m, and it has excellent mechanical properties. At the same time, it maintains good heat resistance, and improves aging resistance and oil resistance, resulting in excellent overall performance.

[0010] According to the present invention, compared with HNBR, the self-crosslinked hydrogen brominated nitrile butadiene rubber has the following characteristics in the proton NMR spectrum: due to the introduction of bromine, the peak intensity of the carbon-carbon double bond of the rubber decreases at 5.7-4.9 ppm, and a characteristic peak of the allyl bromine functional group is present at 4.16 ppm. In this invention...

[0011] Furthermore, the self-crosslinked hydrogen brominated nitrile rubber has a tensile strength of 9.8–22.5 MPa, a tear strength of 46.7–80 kN / m, and a Shore hardness of 65–68.

[0012] A second aspect of the present invention provides a method for preparing the self-crosslinking hydrogen brominated nitrile butadiene rubber, comprising:

[0013] 1) Using hydrogenated nitrile butadiene rubber as raw material, the hydrogenated nitrile butadiene rubber is dissolved in an organic solvent to obtain a rubber solution;

[0014] 2) Mix the adhesive solution with the reaction aid, add the brominating reagent dropwise, and carry out the bromination reaction to obtain the hydrogen brominated rubber adhesive solution;

[0015] 3) Mix the hydrogen bromide rubber solution with the compound, remove the solvent, and hot-press to set the shape;

[0016] The compound is prepared by mixing fillers into hydrogenated nitrile butadiene rubber;

[0017] The brominating reagent is selected from one or more of liquid bromine (Br2), hydrogen peroxide / hydrogen bromide (H2O2 / HBr), dibromohydantoin (DBDMH), and N-bromosuccinimide (NBS).

[0018] The modified rubber preparation method provided by this invention effectively controls the stable progress of the reaction by adjusting the type and amount of reaction auxiliaries, the type of brominating reagent, the reaction solvent, and the reaction temperature during the bromination modification of hydrogenated nitrile butadiene rubber, thereby obtaining a brominated hydrogenated nitrile butadiene rubber with a certain bromination rate and excellent comprehensive performance. The obtained self-crosslinking brominated hydrogenated nitrile butadiene rubber exhibits excellent self-crosslinking properties at room temperature. After reinforcement with fillers, its tensile strength can reach 22.5 MPa, and its tear strength can reach 80.0 kN / m, demonstrating excellent mechanical properties and overall superior performance.

[0019] Preferably, the degree of hydrogenation of the hydrogenated nitrile rubber is 60-90%; the molar ratio of the brominating reagent to the carbon-carbon double bond in the hydrogenated nitrile rubber is (0.1-5):1.

[0020] Further preferred, the brominating agent is preferably hydrogen peroxide / hydrogen bromide or N-bromosuccinimide, and the preferred molar ratio of the brominating agent to the carbon-carbon double bond in HNBR is (0.1-2):1, which makes the viscosity of the adhesive more stable during the reaction.

[0021] Preferably, the reaction aid is selected from one or more of benzoyl peroxide, azobisisobutyronitrile, and n-dodecyl mercaptan; preferably, the amount of the reaction aid is 0.1 to 10% of the mass of the hydrogenated nitrile rubber.

[0022] The present invention shows that when benzoyl peroxide and azobisisobutyronitrile are used, the reaction rate of the bromination reaction is increased, and carboxyl, aldehyde and carbonyl groups are introduced into the molecular chain of the prepared hydrogen brominated butadiene-acrylonitrile rubber. When n-dodecyl mercaptan is used as a reaction auxiliary, it promotes the increase of bromination rate and also has a good regulating effect on the molecular weight of rubber.

[0023] Furthermore, this invention has found that by changing the type of organic solvent, the reaction rate and bromination rate for generating hydrogen brominated nitrile butadiene rubber can be effectively controlled, thereby obtaining a product with excellent overall performance.

[0024] Preferably, the organic solvent for dissolving HNBR is selected from one or more of dichloromethane, trichloromethane, 1,2-dichloroethane, chlorobenzene, tetrahydrofuran, acetone, ethyl acetate, and N-methylpyrrolidone; more preferably, the organic solvent is acetone, chlorobenzene, N-methylpyrrolidone, or tetrahydrofuran. In this invention, some solid brominating reagents need to be completely dissolved in a co-solvent before being added to the reaction system; preferably, the co-solvent is one of acetone, tetrahydrofuran, and N-methylpyrrolidone.

[0025] The organic solvent used in this invention facilitates the dissolution of the adhesive solution and promotes reaction with the modifier. When the organic solvent is acetone, chlorobenzene, N-methylpyrrolidone, or tetrahydrofuran, it does not affect the occurrence of the modification reaction and allows the brominating agent to be better dispersed and dissolved in the adhesive solution to exert its effect. Furthermore, using chlorobenzene as the organic solvent can more effectively control the reaction rate and bromination rate for the formation of hydrogen brominated nitrile butadiene rubber, thereby obtaining a product with better overall performance.

[0026] Preferably, the concentration of the adhesive solution is 1-15%.

[0027] Preferably, the bromination reaction is carried out at a temperature of 30–120°C for 1–24 hours.

[0028] Further preferably, the concentration of the adhesive solution is 5-9%, the bromination reaction temperature is 40-90°C, and the reaction time is 3-10 hours.

[0029] The preferred concentration and reaction conditions of the adhesive solution of this invention can avoid gel formation during the reaction process, and the adhesive solution has a moderate viscosity and is more stable.

[0030] Preferably, in step 3), the hydrogen bromide rubber solution (BHNBR) is mixed with the compound, the solvent is removed, and the mixture is hot-pressed for shaping.

[0031] The compound rubber is prepared by mixing fillers into HNBR;

[0032] Preferably, in step 3), the mass ratio of the HNBR, the filler, and the brominated hydrogenated rubber solution (BHNBR) is 1-2:0.5-1.5:1-2; the hot pressing is performed at 50-70°C and 10-15 MPa for 3-20 minutes.

[0033] According to a preferred embodiment of the present invention, a compound is first prepared by mixing hydrogenated nitrile butadiene rubber with carbon black N330. Then, the compound is added to a brominated hydrogenated nitrile butadiene rubber solution and dissolved completely (the mass ratio of the three is HNBR: N330: BHNBR = 1:0.8:1) to obtain a product. The product is then sieved to remove the solvent and hot-pressed at 150°C and 15MPa for 3 minutes to obtain a self-crosslinked brominated hydrogenated nitrile butadiene rubber.

[0034] Thirdly, the present invention also provides the application of the self-crosslinked hydrogen brominated nitrile rubber material in fields including automobiles, oilfield drilling, aerospace, and new energy.

[0035] The beneficial effects of this invention are at least as follows: This invention employs a chemical modification method to brominate HNBR, resulting in high reaction selectivity, mild and safe reaction conditions, a simple and efficient process, and convenient operation. Simultaneously, the self-crosslinked hydrogen brominated nitrile butadiene rubber prepared by this invention exhibits excellent mechanical properties and good heat resistance. Furthermore, the hydrogen brominated nitrile butadiene rubber prepared by this invention introduces a certain amount of reactive allyl bromine functional groups into the traditional HNBR molecular chain. These allyl bromine functional groups can serve as excellent reaction intermediates, providing new research ideas for further modification. The self-crosslinked hydrogen brominated nitrile butadiene rubber material prepared by this invention has broad application prospects in the automotive, oilfield drilling, aerospace, and new energy fields. Attached Figure Description

[0036] To more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 The proton nuclear magnetic resonance spectra of BHNBR and unmodified HNBR provided in Example 1 of this invention;

[0038] Figure 2 The stress-strain curves of self-crosslinked BHNBR and unmodified HNBR provided in Examples 1-3 of this invention are shown.

[0039] Figure 3 The thermogravimetric curves of self-crosslinked BHNBR and unmodified HNBR provided in Examples 1-3 of this invention are shown.

[0040] Figure 4 The diagram shows the oil resistance properties of self-crosslinked BHNBR and unmodified HNBR provided in Examples 1-3 of this invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the invention clearer, the technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of protection of the invention.

[0042] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention.

[0043] Unless otherwise stated, all raw materials and reagents used in the following examples are commercially available products or can be prepared by known methods. Where specific techniques or conditions are not specified in the examples, they are performed using conventional methods or in accordance with techniques or conditions described in the literature in this field, or according to the product instructions. Reagents and instruments whose manufacturers are not specified are all conventional products that can be purchased from legitimate channels.

[0044] In the following examples, the degree of hydrogenation of the HNBR used is 89%, and the nitrile content of the rubber is 33%, which is obtained by hydrogenation of Nandi NBR3345.

[0045] In the following examples, the molar ratio of carbon-carbon double bonds in the bromide reagent NBS to HNBR was 0.3:1 in Example 1, 0.7:1 in Example 2, and 1.0:1 in Example 3.

[0046] The present invention will be further described below with reference to embodiments.

[0047] Example 1

[0048] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, the specific steps of which are as follows:

[0049] 2g of hydrogenated nitrile butadiene rubber was dissolved in the organic solvent chlorobenzene to prepare a 4% (w / w) hydrogenated nitrile butadiene rubber solution. 60mg of n-dodecyl mercaptan was added, followed by dropwise addition of 146mg of NBS brominating reagent solution (completely dissolved in acetone). The bromination reaction was carried out at 60℃ for 3 hours to obtain brominated hydrogenated nitrile butadiene rubber (BHNBR). The prepared brominated hydrogenated nitrile butadiene rubber was characterized as follows: Figure 1 As shown, compared with unmodified HNBR, the hydrogen brominated nitrile butadiene rubber obtained in Example 1 exhibited a characteristic peak of allyl bromide functional groups at 4.16 ppm, proving the successful preparation of hydrogen brominated nitrile butadiene rubber. HNBR was mixed with carbon black N330 to prepare a compound, which was then added to the hydrogen brominated nitrile butadiene rubber solution and completely dissolved (the mass ratio of the three components was HNBR:N330:BHNBR = 1:0.8:1). After sieving and solvent removal, the self-crosslinking hydrogen brominated nitrile butadiene rubber was prepared by hot pressing at 150°C and 15 MPa for 3 min.

[0050] Example 2

[0051] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, which differs from the method for preparing hydrogen brominated nitrile butadiene rubber described in Example 1 only in that the amount of NBS is replaced with 340 mg and the bromination rate is 2.8%.

[0052] Example 3

[0053] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, which differs from the method for preparing hydrogen brominated nitrile butadiene rubber described in Example 1 only in that the amount of NBS is changed to 486 mg; and the bromination rate is 4.6%.

[0054] Example 4

[0055] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, the specific steps of which are as follows:

[0056] 2g of hydrogenated nitrile butadiene rubber was dissolved in chlorobenzene to prepare a 4% hydrogenated nitrile butadiene rubber solution. 40mg of benzoyl peroxide was added, and 486mg of NBS solution was added dropwise. The reaction was carried out at 60℃ for 3h to obtain brominated hydrogenated nitrile butadiene rubber.

[0057] The prepared hydrogenated butadiene-acrylonitrile rubber was characterized, and the results showed that, compared with the unmodified hydrogenated butadiene-acrylonitrile rubber, the hydrogenated butadiene-acrylonitrile rubber obtained in Example 4 showed a characteristic peak of allyl bromide functional group at 4.16 ppm; the bromination rate was 3.3%.

[0058] Example 5

[0059] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, the specific steps of which are as follows:

[0060] 2g of hydrogenated nitrile butadiene rubber was dissolved in chlorobenzene to prepare a 7% hydrogenated nitrile butadiene rubber solution. 93mg H2O2 and 221mg HBr were added, and the solution was brominated at 60℃ for 3h to obtain brominated hydrogenated nitrile butadiene rubber.

[0061] The prepared hydrogenated butadiene-acrylonitrile rubber was characterized, and the results showed that, compared with the unmodified hydrogenated butadiene-acrylonitrile rubber, the hydrogenated butadiene-acrylonitrile rubber obtained in Example 5 showed a characteristic peak of allyl bromide functional group at 4.16 ppm, and the bromination rate was 0.2%.

[0062] Example 6

[0063] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, the specific steps of which are as follows:

[0064] 2g of hydrogenated nitrile butadiene rubber was dissolved in NMP to prepare a 4% hydrogenated nitrile butadiene rubber solution. 486mg of NBS solution (completely dissolved in NMP) was added dropwise, and the solution was brominated at 60℃ for 3h to obtain brominated hydrogenated nitrile butadiene rubber.

[0065] The prepared hydrogenated butadiene-acrylonitrile rubber was characterized, and the results showed that, compared with the unmodified hydrogenated butadiene-acrylonitrile rubber, the hydrogenated butadiene-acrylonitrile rubber obtained in Example 6 showed a characteristic peak of allyl bromide functional group at 4.16 ppm, and the bromination rate was 2.3%.

[0066] Example 7

[0067] This embodiment provides a method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber, the specific steps of which are as follows:

[0068] 2g of hydrogenated nitrile butadiene rubber was dissolved in chlorobenzene to prepare a 4% hydrogenated nitrile butadiene rubber solution. 486mg of NBS (completely dissolved in acetone) was added dropwise, and the reaction was carried out at 60℃ for 3h to obtain a bromination rate of 2.9% for the hydrogenated nitrile butadiene rubber.

[0069] The prepared hydrogenated butadiene-acrylonitrile rubber was characterized, and the results showed that, compared with the unmodified hydrogenated butadiene-acrylonitrile rubber, the hydrogenated butadiene-acrylonitrile rubber obtained in Example 7 showed a characteristic peak of allyl bromide functional group at 4.16 ppm.

[0070] Comparative Example 1

[0071] This comparative example provides a method for preparing hydrogenated brominated nitrile butadiene rubber, which differs from Example 1 in that it uses a sequence of bromination followed by hydrogenation to prepare the hydrogenated brominated nitrile butadiene rubber. Specifically, the hydrogenated nitrile butadiene rubber in Example 1 is replaced with nitrile butadiene rubber to prepare brominated nitrile butadiene rubber, which is then hydrogenated using a hydrogenation catalyst to obtain the hydrogenated brominated nitrile butadiene rubber.

[0072] The results showed that there were a large number of active allyl bromide functional groups in the system, and gelation occurred during hydrogenation, which affected the modification effect.

[0073] Comparative Example 2

[0074] This comparative example provides a method for preparing hydrogen brominated nitrile butadiene rubber, which differs from Example 1 in that NBS is not added dropwise, but is added directly in three portions.

[0075] The results showed that NBS was poorly dispersed in HNBR adhesive, with pale yellow particles smaller than 2 mm suspended in the adhesive that could not be removed, indicating an unsatisfactory bromination effect.

[0076] Effect test:

[0077] The bromination rates (mol%) of the self-crosslinked hydrogen brominated nitrile rubbers prepared in Examples 1-3 were 0.9, 2.8, and 4.6, respectively.

[0078] Among the embodiments provided in this invention, the self-crosslinking hydrogen brominated nitrile butadiene rubber prepared in Example 2 exhibits the best overall bromination rate performance (e.g., Figure 2 As shown in the figure, the tensile strength is 22.5 MPa, the tear strength is 80 kN / m, the elongation at break is 1694%, the stress at 100% elongation is 1.5 MPa, and the Shore hardness is 68.

[0079] The self-crosslinked BHNBRs in Examples 1-3 were aged in a hot air oven at 100°C for 72 hours. According to the formula: tensile strength change rate (%) = (|after aging - before aging| / tensile strength before aging) * 100%, the test results are shown in Table 1.

[0080] Table 1. Changes in tensile strength of HNBR with different bromination rates before and after aging.

[0081]

[0082] As can be seen from the test results in the table above, the self-crosslinking BHBNBR provided by this invention has good aging resistance.

[0083] like Figure 3 As shown in the figures, the TGA and DTG graphs of the self-crosslinking brominated hydrogenated nitrile butadiene rubber and hydrogenated nitrile butadiene rubber prepared in Examples 1-3 are obtained under nitrogen atmosphere at a heating rate of 10℃ / min. The heat resistance of the self-crosslinking brominated hydrogenated nitrile butadiene rubber is almost unaffected compared to that of the hydrogenated nitrile butadiene rubber. Their mechanical properties are shown in Table 2.

[0084] Table 2 Mechanical properties of HNBR with different bromination rates

[0085]

[0086] like Figure 4 The figure shows a comparison of the oil resistance of the self-crosslinked brominated hydrogenated nitrile butadiene rubber and hydrogenated nitrile butadiene rubber prepared in Examples 1-3 in IRM903# oil at 100°C for 24 hours. It can be seen from the figure that the swelling degree of the self-crosslinked BHNBR provided by the present invention in IRM903# oil gradually decreases with the increase of bromination rate, that is, the oil resistance gradually improves.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-crosslinking hydrogen brominated nitrile butadiene rubber, characterized in that, The self-crosslinking hydrogenated brominated nitrile butadiene rubber is prepared by using hydrogenated nitrile butadiene rubber with a hydrogenation degree of 60-90% as raw material and undergoing a bromination reaction; the self-crosslinking hydrogenated brominated nitrile butadiene rubber contains allyl bromine functional groups, and the content of the allyl bromine functional groups is 0.1-5.0 mol%; the tensile strength of the self-crosslinking hydrogenated brominated nitrile butadiene rubber is 9.8-22.5 MPa, the tear strength is 46.7-80 kN / m, and the Shore hardness is 65-68; The preparation method of the self-crosslinking hydrogen brominated nitrile butadiene rubber includes: 1) Using hydrogenated nitrile butadiene rubber as raw material, the hydrogenated nitrile butadiene rubber is dissolved in an organic solvent to obtain a rubber solution; 2) Mix the adhesive solution with the reaction aid, add the brominating reagent dropwise, and carry out the bromination reaction to obtain the hydrogen brominated rubber adhesive solution; 3) The brominated hydrogenated rubber solution is mixed with the compound, the solvent is removed, and the mixture is hot-pressed for shaping; wherein the compound is prepared by mixing filler into hydrogenated nitrile rubber; The brominating reagent is selected from one or more of liquid bromine, hydrogen peroxide / hydrogen bromide, dibromohydantoin, and N-bromosuccinimide; The reaction aid is n-dodecyl mercaptan, and the amount of the reaction aid is 0.1-10% of the mass of the hydrogenated nitrile rubber. The organic solvent is chlorobenzene, and the concentration of the adhesive solution is 1-15%.

2. The self-crosslinking hydrogen brominated nitrile butadiene rubber according to claim 1, characterized in that, The 1H NMR spectrum of the self-crosslinked hydrogen brominated butadiene-acrylonitrile rubber shows a characteristic peak of allyl bromide functional group at 4.16 ppm.

3. The self-crosslinking hydrogen brominated nitrile butadiene rubber according to claim 1, characterized in that, The degree of hydrogenation of the hydrogenated nitrile rubber is 60-90%; the molar ratio of the brominating reagent to the carbon-carbon double bond in the hydrogenated nitrile rubber is (0.1-5):

1.

4. The self-crosslinking hydrogen brominated nitrile butadiene rubber according to claim 1, characterized in that, The concentration of the adhesive solution is 5-9%.

5. The method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber according to any one of claims 1 to 4, characterized in that, The bromination reaction is carried out at a temperature of 30~120℃ for a time of 1~24h.

6. The method for preparing self-crosslinking hydrogen brominated nitrile butadiene rubber according to claim 5, characterized in that, The bromination reaction is carried out at a temperature of 40-90°C for 3-10 hours.

7. The application of the self-crosslinking hydrogen brominated nitrile butadiene rubber according to claims 1 to 4 in the automotive, oilfield drilling, aerospace, and new energy fields.

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