Hydrogenated nitrile rubber composition and application thereof, vulcanized rubber and preparation method and application thereof

Abstract

The present invention relates to the field of rubber, and discloses a hydrogenated nitrile rubber composition and its application, vulcanized rubber and its preparation method and application. The rubber composition includes the following components: 100 parts by mass of hydrogenated nitrile rubber; 40-90 parts by mass of reinforcing agent; 4-12 parts by mass of activator; 2-13 parts by mass of plasticizer; 2-8 parts by mass of antioxidant; 5-25 parts by mass of vulcanized resin; 1-15 parts by mass of metal chloride; wherein the reinforcing agent includes the following components: 20-50 parts by mass of carbon black, 15-25 parts by mass of white carbon black, and 5-15 parts by mass of acrylic acid metal salt. The hydrogenated nitrile rubber composition can ensure that the vulcanized rubber prepared by the rubber composition has high strength and hardness, and significantly improves the wear resistance and aging resistance of the vulcanized rubber, thereby meeting the application requirements of the end barrel of the oil field packer.

Description

Technical Field

[0001] The invention relates to the field of rubber, and in particular to a hydrogenated nitrile rubber composition, a method for preparing a vulcanized rubber, the vulcanized rubber prepared by the preparation method, and application of the rubber composition or the vulcanized rubber in an end barrel of an oilfield packer. Background Art

[0002] With the continuous in-depth development of oil and gas fields, more and more wells need to be constructed using the technology of layered injection and production, layered fracturing, and staged water plugging. The packer is one of the key tools for oil well completion operations, and is responsible for isolating the annulus of the oil casing and ensuring the safety of the wellbore. The rubber cylinder is the core component of the packer and is the direct executor of the sealing effect. Generally, the packer rubber cylinder is composed of three rubber cylinders. The middle rubber cylinder mainly plays a sealing role, and the end cylinders at both ends play a pressure-bearing role. Therefore, the end cylinders are required to have high hardness and considerable strength, and at the same time, there are also quite high requirements for the wear resistance and heat resistance of the end cylinders.

[0003] Therefore, how to improve the performance of packer rubber materials has become an important research direction. Summary of the invention

[0004] The purpose of the present invention is to overcome the fact that the wear resistance and heat resistance of the end barrel of the oil field packer in the prior art cannot meet the actual needs, and to provide a hydrogenated nitrile rubber composition and its application, vulcanized rubber and its preparation method and application. The hydrogenated nitrile rubber composition can significantly improve the wear resistance and heat resistance of the vulcanized rubber on the premise that the vulcanized rubber prepared from the rubber composition has high strength and hardness, thereby meeting the application requirements of the end barrel of the oil field packer.

[0005] In order to achieve the above object, the first aspect of the present invention provides a hydrogenated nitrile rubber composition, characterized in that the composition comprises the following components:

[0006] 100 parts by mass of hydrogenated nitrile rubber;

[0007] 40-90 parts by weight of reinforcing agent;

[0008] Activator 4-12 parts by mass;

[0009] 2-13 parts by weight of plasticizer;

[0010] 2-8 parts by weight of antioxidant;

[0011] 5-25 parts by mass of vulcanized resin;

[0012] 1-15 parts by weight of metal chloride;

[0013] The reinforcing agent comprises the following components: 20-50 parts by mass of carbon black, 15-25 parts by mass of white carbon black, and 5-15 parts by mass of acrylic acid metal salt.

[0014] A second aspect of the present invention provides a method for preparing vulcanized rubber, characterized in that the method comprises the following steps:

[0015] The components in the hydrogenated nitrile rubber composition are mixed to obtain a rubber mix, and the rubber mix is ​​vulcanized to obtain the vulcanized rubber.

[0016] The third aspect of the present invention provides a vulcanized rubber obtained by the above preparation method.

[0017] A fourth aspect of the present invention provides the use of the hydrogenated nitrile rubber composition or the vulcanized rubber in an end barrel of an oilfield packer.

[0018] Through the above technical scheme, the hydrogenated nitrile rubber composition and its application, the vulcanized rubber and its preparation method and application provided by the present invention achieve the following beneficial effects:

[0019] In the hydrogenated nitrile rubber composition provided by the present invention, carbon black, white carbon black and acrylic metal salt are added to the hydrogenated nitrile rubber as reinforcing agents, and act together with other components, especially a specific vulcanization system. The rubber composition obtained thereby can significantly improve the wear resistance and aging resistance of the vulcanized rubber while ensuring that the prepared vulcanized rubber has high strength and hardness. Thus, a vulcanized rubber having high strength, hardness, wear resistance and aging resistance and meeting the application requirements of the packer end tube can be obtained.

[0020] Furthermore, in the present invention, by using specific carbon black, white carbon black and specific hydrogenated nitrile rubber in combination, the strength, hardness, wear resistance and aging resistance of the prepared vulcanized rubber can be further improved. DETAILED DESCRIPTION

[0021] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0022] The first aspect of the present invention provides a hydrogenated nitrile rubber composition, characterized in that the composition comprises the following components:

[0023] 100 parts by mass of hydrogenated nitrile rubber;

[0024] 40-90 parts by weight of reinforcing agent;

[0025] Activator 4-12 parts by mass;

[0026] 2-13 parts by weight of plasticizer;

[0027] 2-8 parts by weight of antioxidant;

[0028] 5-25 parts by mass of vulcanized resin;

[0029] 1-15 parts by weight of metal chloride;

[0030] The reinforcing agent comprises the following components: 20-50 parts by mass of carbon black, 15-25 parts by mass of white carbon black, and 5-15 parts by mass of acrylic acid metal salt.

[0031] In the present invention, the inventors have found that by using carbon black, white carbon black and acrylic metal salts as reinforcing agents and adding them to hydrogenated nitrile rubber, and acting together with other components, especially a specific vulcanization system, the rubber composition obtained can significantly improve the wear resistance and aging resistance of the vulcanized rubber while making the prepared vulcanized rubber have high strength and hardness, thereby obtaining a vulcanized rubber that has high strength, hardness, wear resistance and heat resistance and can meet the application requirements of the packer end barrel.

[0032] Furthermore, the composition comprises the following components:

[0033] 100 parts by mass of hydrogenated nitrile rubber;

[0034] Reinforcing agent 50-80 parts by mass;

[0035] Activator 5-10 parts by mass;

[0036] 2-10 parts by weight of plasticizer;

[0037] 2-4 parts by weight of antioxidant;

[0038] 10-20 parts by mass of vulcanized resin;

[0039] 4-12 parts by mass of metal chloride;

[0040] The reinforcing agent comprises the following components: 25-42 parts by mass of carbon black, 18-25 parts by mass of white carbon black, and 7-13 parts by mass of acrylic acid metal salt.

[0041] According to the present invention, the Mooney viscosity ML of the hydrogenated nitrile rubber is 1+4 100℃ ≥50, saturation ≥90%, acrylonitrile content ≥34wt%.

[0042] According to the present invention, the iodine absorption value of the carbon black is 80-160 g / kg, and the DBP absorption value of the carbon black is (90-130)×10 -5 m 3 / kg.

[0043] According to the present invention, the nitrogen adsorption specific surface area of ​​the white carbon black is 100-220m 2 / g.

[0044] In the present invention, specific carbon black, white carbon black and specific hydrogenated nitrile rubber are used in combination, so that the strength, hardness, wear resistance and aging resistance of the prepared vulcanized rubber can be further improved.

[0045] Furthermore, the Mooney viscosity ML of the hydrogenated nitrile rubber is 1+4 100℃ ≥65, saturation ≥95%, acrylonitrile content ≥36wt%.

[0046] Furthermore, the iodine absorption value of the carbon black is 120-160 g / kg, and the DBP absorption value of the carbon black is (110-130)×10 -5 m 3 / kg.

[0047] Furthermore, the nitrogen adsorption specific surface area of ​​the white carbon black is 150-220m 2 / g.

[0048] According to the present invention, the acrylic metal salt is at least one selected from zinc acrylate, magnesium acrylate, aluminum acrylate, zinc methacrylate, magnesium methacrylate and aluminum methacrylate.

[0049] According to the present invention, the antioxidant is selected from at least one of amine antioxidants, phenol antioxidants, quinoline antioxidants and benzimidazole antioxidants.

[0050] According to the present invention, the plasticizer is selected from at least one of phthalates, fatty dibasic acid esters, partial phenyl esters, ether esters and polyesters.

[0051] According to the present invention, the activator is a metal oxide and a fatty acid; specifically, the metal oxide is selected from zinc oxide and / or magnesium oxide; and the fatty acid is selected from stearic acid.

[0052] According to the present invention, the vulcanized resin is octylphenol-formaldehyde resin.

[0053] According to the present invention, the metal chloride is selected from at least one of stannous chloride dihydrate, cupric chloride dihydrate and zinc chloride.

[0054] In the present invention, the vulcanization system comprising the vulcanized resin and the metal chloride can cooperate with other components in the composition, especially the reinforcing agent and the hydrogenated nitrile rubber, so that the vulcanized rubber prepared from the composition has excellent strength and hardness, and the wear resistance and aging resistance are significantly improved.

[0055] A second aspect of the present invention provides a method for preparing vulcanized rubber, characterized in that the method comprises the following steps:

[0056] The components in the hydrogenated nitrile rubber composition are mixed to obtain a rubber mix, and the rubber mix is ​​vulcanized to obtain the vulcanized rubber.

[0057] According to the present invention, the steps of mixing the components in the hydrogenated nitrile rubber are as follows:

[0058] (1) performing a first mixing of hydrogenated nitrile rubber, a reinforcing agent, an activator, an antioxidant, and a plasticizer to obtain a masterbatch;

[0059] (2) Mixing the vulcanized resin, the metal chloride and the first stage masterbatch to obtain a mixed rubber.

[0060] The types and amounts of raw materials used to prepare the vulcanized rubber in the second aspect of the present invention are exactly the same as those described in the first aspect of the present invention. In order to avoid repetition, the present invention will not be described in detail in the second aspect, and those skilled in the art should not understand this as a limitation of the present invention.

[0061] In the present invention, the first kneading and the second kneading can be performed in a conventional kneading device in the art. Preferably, the first kneading and the second kneading are performed in an internal mixer.

[0062] According to the present invention, the method further comprises masticating the hydrogenated nitrile rubber.

[0063] According to the present invention, the conditions for plasticizing the hydrogenated nitrile rubber include: a plasticizing temperature of 50-90° C.; and a plasticizing time of 0.5-3 min.

[0064] In the present invention, an internal mixer is used for the internal mixing. During the internal mixing, the rotating speed of the internal mixer is 40-80 rpm.

[0065] According to the present invention, the mixing temperature of the first mixing is 135-185° C., and the mixing time of the first mixing is 3-10 min.

[0066] Furthermore, the mixing temperature of the first mixing is 150-180° C.; and the mixing time of the first mixing is 5-8 min.

[0067] In the present invention, during the first mixing, the rotation speed of the internal mixer is 50-80 rpm.

[0068] In the present invention, preferably, the method further comprises the step of plasticizing a section of masterbatch, the time for plasticizing the masterbatch is 0.5-3 minutes, and the temperature for plasticizing the masterbatch is 40-60°C.

[0069] In the present invention, when the masterbatch is plasticated, the rotating speed of the internal mixer is 40-60 rpm.

[0070] According to the present invention, the mixing temperature of the second mixing is not more than 140° C., and the mixing time of the second mixing is 4-6 minutes.

[0071] Furthermore, the mixing temperature of the second mixing is 80-110° C.; and the mixing time of the second mixing is 4-5 min.

[0072] In the present invention, during the second mixing, the rotating speed of the internal mixer is 40-60 rpm.

[0073] According to the present invention, the vulcanization conditions include: vulcanization time of 15-60 min; vulcanization temperature of 150-180° C.; and vulcanization pressure of 3.5-40 MPa.

[0074] Furthermore, the vulcanization conditions include: vulcanization time of 30-50 min; vulcanization temperature of 165-180° C.; and vulcanization pressure of 10-20 MPa.

[0075] In the present invention, unless otherwise specified, all pressures used are gauge pressures.

[0076] The third aspect of the present invention provides a vulcanized rubber obtained by the above preparation method.

[0077] A fourth aspect of the present invention provides use of the hydrogenated nitrile rubber composition or the vulcanized rubber in an end barrel of an oilfield packer.

[0078] The present invention will be described in detail below through examples.

[0079] In the following examples, unless otherwise specified, all the raw materials used are commercially available.

[0080] The equipment conditions for preparing the vulcanized rubber in the following examples and comparative examples are shown in Table 1.

[0081] The testing instruments of the vulcanized rubbers prepared in the examples and comparative examples are shown in Table 2, and the testing conditions are shown in Table 3.

[0082] The chemical reagents used in the embodiments and comparative examples are commercially available, as follows:

[0083] Hydrogenated nitrile rubber: 4309, ML 1+4 100℃ 100, saturation 99%, acrylonitrile content 43wt%, ARLANXEO product; 2010, ML 1+4 100℃ 85, saturation 95%, acrylonitrile content 36wt%, Japan Ruiong product; 3310, ML 1+4 100℃ 80, saturation 95%, acrylonitrile content 25wt%, Japan Zeon product;

[0084] Carbon black N234, iodine absorption value is 120g / kg, DBP absorption value is 115×10 -5 m 3 / kg, Dongguan Qideli Chemical Technology Co., Ltd.;

[0085] White carbon black 1165MP, BET 165m 2 / g, Qingdao Rhodia Silica Co., Ltd.;

[0086] White carbon black 90GR, BET is 90m 2 / g, Quecheng Silica Chemical Co., Ltd.;

[0087] Zinc methacrylate: Beijing Science and Technology Chemical Technology Co., Ltd.

[0088] Plasticizer: trioctyl trimellitate (TOTM), Shandong Langtai Chemical Co., Ltd.;

[0089] Activator: zinc oxide, stearic acid, Weifang Hengfeng Chemical Co., Ltd.;

[0090] Antioxidant: 4,4'-bis(α,α-dimethylbenzyl)diphenylamine (anti-445), Shanghai Dunmei New Material Technology Co., Ltd.; 2-mercaptobenzimidazole zinc (anti-MBZ), Linhai Xinhua Chemical Plant;

[0091] Curing resin: SP-1045, SI Group Chemical (Shanghai) Co., Ltd.

[0092] Metal chloride: stannous chloride dihydrate, Shanghai Runjie Chemical Reagent Co., Ltd.

[0093] The amounts of components in the following examples and comparative examples are all parts by mass.

[0094] Table 1

[0095] Serial number Device Name model Manufacturer 1 Internal Mixer BR1600 Farrell Corporation 2 Open Mixing Mill XK-160 Qingdao Xincheng Yiming Machinery Co., Ltd. 3 Plate vulcanizing press XLB-D400*400*2 Shanghai First Rubber Machinery Factory

[0096] Table 2

[0097] Serial number Test items Test instrument model Manufacturer 1 Tensile Strength Universal tensile machine, SHIMADZU, AG-20KNG Shimadzu Corporation 2 hardness HT 3000 Montech, Germany 3 Akron Wear GT-7012-A China Taiwan High Speed ​​Rail Corporation 4 Aging test chamber GT-7017-E China Taiwan High Speed ​​Rail Corporation

[0098] Table 3

[0099]

[0100] Example 1

[0101] Formula: Hydrogenated nitrile rubber 4309 100; carbon black N234 25; white carbon black 1165MP 25; zinc methacrylate 10; TOTM 6; zinc oxide 6; stearic acid 1; SP-1045 15; stannous chloride dihydrate 8; antioxidant 445 2; antioxidant MBZ 1.

[0102] The speed of the internal mixer is set to 80 rpm, the initial mixing temperature is 80°C, and the raw rubber is plasticized for 0.5 min; all materials except vulcanized resin and metal chloride are added for the first mixing, the first mixing temperature is 150-180°C, the first mixing time is 5 min, the material is discharged, and the material is placed for 4 hours after discharge; the speed of the internal mixer is set to 60 rpm, the initial plasticizing temperature is 40°C, after the masterbatch in the previous step is plasticized for 1 min, the vulcanized resin and metal chloride are added for the second mixing, the second mixing time is 4 min, the second mixing temperature is 110-120°C, and the material is discharged.

[0103] The mixed sample was subjected to plate vulcanization at 170°C, a pressure of 15 MPa, and a time of 40 min. The obtained sample was marked as S-1.

[0104] The performance of sample S-1 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0105] Example 2

[0106] Formula: hydrogenated nitrile rubber 2010 100; carbon black N234 42; white carbon black 1165MP 25; zinc methacrylate 7; TOTM 2; zinc oxide 8; stearic acid 2; SP-1045 10; stannous chloride dihydrate 12; antioxidant 445 1; antioxidant MBZ 1.

[0107] The speed of the internal mixer is set to 80 rpm, the initial mixing temperature is 80°C, and the raw rubber is plasticized for 1 min; all fillers except vulcanized resin and metal chloride are added for the first mixing, the first mixing temperature is 150-180°C, the first mixing time is 8 min, the material is discharged, and the material is placed for 4 hours after discharge; the speed of the internal mixer is set to 60 rpm, the initial plasticizing temperature is 40°C, after the masterbatch of the previous step is plasticized for 1 min, the vulcanized resin and metal chloride are added for the second mixing, the second mixing time is 4 min, the second mixing temperature is 110-120°C, and the material is discharged.

[0108] The mixed sample was subjected to plate vulcanization at 170°C, a pressure of 15 MPa, and a time of 40 min. The obtained sample was marked as S-2.

[0109] The performance of sample S-2 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0110] Example 3

[0111] Formula: hydrogenated nitrile rubber 4309 100; carbon black 34; white carbon black 1165MP 21; zinc methacrylate 13; TOTM 10; zinc oxide 4; stearic acid 1; SP-1045 20; stannous chloride dihydrate 4; antioxidant 445 2; antioxidant MBZ 2.

[0112] The speed of the internal mixer is set to 80 rpm, the initial mixing temperature is 80°C, and the raw rubber is plasticized for 1 min; all fillers except vulcanized resin and metal chloride are added for the first mixing, the first mixing temperature is 150-180°C, the first mixing time is 4 min, the material is discharged, and the material is placed for 4 hours after discharge; the speed of the internal mixer is set to 60 rpm, the initial plasticizing temperature is 40°C, after the masterbatch of the previous step is plasticized for 1 min, the vulcanized resin and metal chloride are added for the second mixing, the second mixing time is 4 min, the second mixing temperature is 110-120°C, and the material is discharged.

[0113] The mixed sample was subjected to plate vulcanization at 170°C, a pressure of 15 MPa, and a time of 40 min. The obtained sample was marked as S-3.

[0114] The performance of sample S-3 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0115] Example 4

[0116] A vulcanized rubber sample was prepared according to the method of Example 1, except that the amount of carbon black was 50%, the amount of white carbon black 1165MP was 15%, and the amount of zinc methacrylate was 15.

[0117] The prepared sample was labeled S-4.

[0118] The performance of sample S-4 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0119] Example 5

[0120] The vulcanized rubber sample was prepared according to the method of Example 2, except that the amount of TOTM was 13 parts.

[0121] The prepared sample was labeled S-5.

[0122] The performance of sample S-5 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0123] Example 6

[0124] The vulcanized rubber sample was prepared according to the method of Example 3, except that the amount of SP-1045 used was 25 parts and the content of the metal chloride was 1 part.

[0125] The prepared sample was labeled S-6.

[0126] The performance of sample S-6 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0127] Example 7

[0128] The vulcanized rubber sample was prepared according to the method of Example 1, except that the white carbon black was 90GR.

[0129] The prepared sample was labeled S-7.

[0130] The performance of sample S-7 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0131] Example 8

[0132] The vulcanized rubber sample was prepared according to the method of Example 1, except that HNBR 3310 was used as hydrogenated nitrile rubber.

[0133] The prepared sample was labeled S-8.

[0134] The performance of sample S-8 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0135] Comparative Example 1

[0136] A vulcanized rubber sample was prepared according to the method of Example 1, except that zinc methacrylate was replaced by an equal weight portion of carbon black.

[0137] The prepared sample was marked as D-1.

[0138] The performance of sample D-1 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0139] Comparative Example 2

[0140] A vulcanized rubber sample was prepared according to the method of Example 2, except that white carbon black was replaced by an equal weight portion of carbon black.

[0141] The prepared sample was marked as D-2.

[0142] The performance of sample D-2 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0143] Comparative Example 3

[0144] A vulcanized rubber sample was prepared according to the method of Example 3, except that the carbon black was replaced by an equal weight portion of zinc methacrylate.

[0145] The prepared sample was marked as D-3.

[0146] The performance of sample D-3 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0147] Comparative Example 4

[0148] The vulcanized rubber sample was prepared according to the method of Example 1, except that the amount of white carbon black was 5 parts.

[0149] The prepared sample was marked as D-4.

[0150] The performance of sample D-4 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0151] Comparative Example 5

[0152] The vulcanized rubber sample was prepared according to the method of Example 1, except that no metal chloride was added.

[0153] The prepared sample was marked as D-5.

[0154] The performance of sample D-5 was tested according to the experimental methods in Table 2 and Table 3. The results are shown in Table 4.

[0155] Table 4

[0156]

[0157]

[0158] It can be seen from Table 4 that the vulcanized rubber made from the rubber composition of the present invention can have high strength, high hardness, high wear resistance and excellent aging resistance, so that the vulcanized rubber can meet the application requirements of the packer end barrel.

[0159] In particular, it can be seen from the performance of the vulcanized rubber prepared in Examples 1-6 and Examples 7-8 that the use of specific carbon black, white carbon black and specific hydrogenated nitrile rubber can further improve the strength, hardness, wear resistance and aging resistance of the vulcanized rubber.

[0160] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A hydrogenated nitrile rubber composition, characterized in that The composition comprises the following components: 100 parts by mass of hydrogenated nitrile rubber; Reinforcing agent 50-80 parts by mass; Activator 5-10 parts by mass; 2-10 parts by weight of plasticizer; 2-4 parts by weight of antioxidant; 15-20 parts by mass of vulcanized resin; 4-12 parts by mass of metal chloride; Wherein, the reinforcing agent comprises the following components: 25-42 parts by mass of carbon black, 18-25 parts by mass of white carbon black, and 7-13 parts by mass of acrylic acid metal salt; The Mooney viscosity ML of the hydrogenated nitrile rubber 1+4 100℃ ≥50, saturation ≥90%, acrylonitrile content ≥34wt%; The nitrogen adsorption specific surface area of ​​the white carbon black is 100-220m 2 / g.

2. The hydrogenated nitrile rubber composition according to claim 1, wherein The iodine absorption value of the carbon black is 80-160 g / kg, and the DBP absorption value of the carbon black is (90-130)×10 -5 m 3 / kg.

3. The hydrogenated nitrile rubber composition according to claim 1 or 2, wherein The acrylic acid metal salt is at least one selected from zinc acrylate, magnesium acrylate, aluminum acrylate, zinc methacrylate, magnesium methacrylate and aluminum methacrylate.

4. The hydrogenated nitrile rubber composition according to claim 1 or 2, wherein The antioxidant is selected from at least one of amine antioxidants, phenol antioxidants, quinoline antioxidants and benzimidazole antioxidants.

5. The hydrogenated nitrile rubber composition according to claim 1 or 2, wherein The plasticizer is selected from at least one of phthalates, fatty dibasic acid esters, partial phenyl esters, ether esters and polyesters.

6. The hydrogenated nitrile rubber composition according to claim 1 or 2, wherein The activators are metal oxides and fatty acids.

7. The hydrogenated nitrile rubber composition according to claim 6, wherein The metal oxide is selected from zinc oxide and / or magnesium oxide.

8. The hydrogenated nitrile rubber composition according to claim 6, wherein The fatty acid is selected from stearic acid.

9. The hydrogenated nitrile rubber composition according to claim 1 or 2, wherein The vulcanized resin is octylphenol-formaldehyde resin.

10. The hydrogenated nitrile rubber composition according to claim 1 or 2, wherein The metal chloride is selected from at least one of stannous chloride dihydrate, cupric chloride dihydrate and zinc chloride.

11. A method for preparing vulcanized rubber, characterized in that: The method comprises the following steps: The components in the hydrogenated nitrile rubber composition according to any one of claims 1 to 10 are mixed to obtain a rubber mix, and the rubber mix is ​​vulcanized to obtain the vulcanized rubber.

12. The method according to claim 11, wherein: The steps of mixing the components in the hydrogenated nitrile rubber are as follows: (1) performing a first mixing of hydrogenated nitrile rubber, a reinforcing agent, an activator, an antioxidant, and a plasticizer to obtain a masterbatch; (2) The vulcanized resin, the metal chloride and the first stage masterbatch are subjected to a second mixing process to obtain a mixed rubber.

13. The method according to claim 12, wherein: The method also includes masticating the hydrogenated nitrile rubber.

14. The method according to claim 13, wherein: The conditions for plasticizing the hydrogenated nitrile rubber include: plasticizing temperature of 50-90° C.; plasticizing time of 0.5-3 min.

15. The method according to any one of claims 12 to 14, wherein: The mixing temperature of the first mixing is 135-185° C., and the mixing time of the first mixing is 3-10 min.

16. The method according to claim 15, wherein: The mixing temperature of the first mixing is 150-180° C., and the mixing time of the first mixing is 5-8 min.

17. The method according to any one of claims 12 to 14, wherein: The mixing temperature of the second mixing is no more than 140° C., and the mixing time of the second mixing is 4-6 min.

18. The method according to claim 17, wherein: The mixing temperature of the second mixing is 80-110° C., and the mixing time of the second mixing is 4-5 min.

19. The method according to any one of claims 11 to 14, wherein: The vulcanization conditions include: vulcanization time of 15-60 minutes, vulcanization temperature of 150-180° C., and vulcanization pressure of 3.5-40 MPa.

20. The method according to claim 19, wherein: The vulcanization conditions include: vulcanization time of 30-50 minutes, vulcanization temperature of 165-180° C., and vulcanization pressure of 10-20 MPa.

21. A vulcanized rubber prepared by the method of any one of claims 11 to 20.

22. Use of the hydrogenated nitrile rubber composition according to any one of claims 1 to 10 or the vulcanized rubber according to claim 21 in an end barrel of an oilfield packer.

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