Sealing ring material and preparation method thereof

Abstract

The invention relates to a sealing ring material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The sealing ring material is prepared from the following components in parts by weight: 100 parts of nitrile rubber, 15 to 20 parts of chloroprene rubber, 10 to 15 parts of a CNT composite enhancer, 12 to 17 parts of reinforcing filler, 1.9 to 2.3 parts of a vulcanizing agent, 1 to 1.4 parts of an accelerant, 2 to 3 parts of an anti-aging agent and 2.2 to 2.8 parts of an anti-sticking agent, the CNT composite reinforcer is prepared by the following steps: carrying out addition reaction on alkyl mercaptan and diallylamine to obtain an intermediate 1, carrying out substitution on allyl iodide and secondary amine in the intermediate 1 to obtain an intermediate 2, carrying out quaternization reaction on 3-chloropropyltrimethoxysilane and the intermediate 2 to obtain a modifier, and finally loading the modifier on the surface of a carbon nanotube. The CNT composite reinforcer is introduced, so that the obdurability of the material is synergistically improved, and the material is endowed with excellent permanent compression deformation resistance and creep resistance.

Description

Technical Field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a sealing ring material and a preparation method thereof. Background Art

[0002] The main function of the sealing ring is to prevent the leakage of liquid or gas. According to the functional classification of sealing rings, there are mainly oil-resistant sealing rings, waterproof sealing rings, anti-corrosion sealing rings, gas sealing rings, etc.; according to the form of sealing rings, there are also many varieties of products, mainly lip sealing rings, O-rings and sealing rings with complex cross-section shapes, etc.; they are widely used in various industrial machinery, hydraulic pipelines, valves and other fields.

[0003] At present, most common sealing rings on the market are based on rubber, which has good elasticity and can deform under stress to fill the gap to form a seal. It can adapt to mating surfaces of different shapes and sizes. Among them, nitrile rubber / chloroprene rubber composite sealing materials are both oil-resistant and weather-resistant, and are widely used in various sealing environments; however, the strength of rubber materials is insufficient, especially in some high-pressure pipelines, the strength of rubber sealing rings is insufficient, and the sealing of metal sealing rings is unstable, resulting in sealing materials gradually being unable to meet the development needs of high pressure and low loss; in the prior art, by introducing high-performance fillers such as graphene (Gr), carbon nanotubes (CNT), etc. into rubber materials, these fillers can improve the strength of rubber sealing materials to a certain extent, but these fillers are mostly hard materials. Under the action of external forces, the two are very likely to produce irreversible sliding deformation, causing the sealing structure to deform, resulting in reduced sealing performance, or even sealing failure. Summary of the invention

[0004] In order to solve the technical problems mentioned in the background technology, the purpose of the present invention is to provide a sealing ring material and a preparation method thereof.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A sealing ring material comprises, by weight, 100 parts of nitrile rubber, 15-20 parts of chloroprene rubber, 10-15 parts of a CNT composite reinforcing agent, 12-17 parts of a reinforcing filler, 1.9-2.3 parts of a vulcanizing agent, 1-1.4 parts of an accelerator, 2-3 parts of an antioxidant and 2.2-2.8 parts of an anti-adhesive agent.

[0006] The CNT composite reinforcing agent is prepared by the following method: Step A1: premix diallylamine, benzoyl peroxide and acetone, pass nitrogen protection, heat to 30-55°C, apply 60-90rpm stirring, assist with 120-200W / m2 ultraviolet irradiation, slowly add alkyl mercaptan to react for 2.5-4h, add sodium sulfite to quench the reaction after the reaction, remove acetone by rotary evaporation, wash the substrate with water and dry it to obtain intermediate 1; Furthermore, the feed ratio of diallylamine, alkyl mercaptan, benzoyl peroxide and acetone is 0.1 mol: 0.2 mol: 0.07-0.11 g: 60-120 mL, and the alkyl mercaptan and diallylamine undergo addition reaction to introduce a terminal alkyl chain. The specific reaction process is shown as follows:

[0007] Preferably, the alkyl mercaptan is selected from one of n-octyl mercaptan, n-tetradecyl mercaptan and n-octadecyl mercaptan.

[0008] Step A2: premix the intermediate 1, potassium carbonate, 15-crown ether-5 and tetrahydrofuran, preheat to 30-40°C, apply stirring at 120-180 rpm, intermittently add allyl iodide to react for 2.5-4h, then continue to heat to 55-65°C to react for 1-1.5h, and after the reaction is completed, remove tetrahydrofuran by rotary evaporation, wash the substrate with water and dry it to obtain the intermediate 2; Furthermore, the feed ratio of intermediate 1, allyl iodide, potassium carbonate, 15-crown ether-5 and tetrahydrofuran is 0.1 mol: 0.1 mol: 0.5-0.8 g: 6-10 mL: 100-170 mL, and allyl iodide replaces the secondary amine in intermediate 1 to form a tertiary amine compound. The specific reaction process is shown as follows:

[0009] Step A3: Mix the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane, raise the temperature to 90-100°C, apply stirring at 30-50 rpm, reflux for 20-30 hours, and after the reaction is completed, perform vacuum rotary evaporation to quickly remove dioxane to obtain a modifier; Further, the feed ratio of intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane is 0.1 mol: 0.105-0.11 mol: 0.9-1.4 g: 40-60 mg: 150-240 mL, and 3-chloropropyltrimethoxysilane is subjected to quaternization reaction with intermediate 2. The specific reaction process is shown as follows:

[0010] Step A4: Mix the modifier, dimethylacetamide, ethanol and deionized water, adjust the pH value to 2-3 with hydrochloric acid, add carbon nanotubes and disperse them by ultrasonication, stir for 3-4 hours, then neutralize with ammonia water, let stand for 24 hours, wash and dry the precipitate, and obtain a CNT composite reinforcing agent; Furthermore, the feed ratio of carbon nanotubes, modifiers, dimethylacetamide, ethanol and deionized water is 10g: 0.6-0.8g: 10-15mL: 10-20mL: 15-25mL, and the modifiers are hydrolyzed under acidic conditions and coupled and loaded onto the surface of carbon nanotubes for composite.

[0011] Preferably, the vulcanizing agent is selected from sulfur, and the accelerator is compounded from zinc oxide and tetrabenzylthiuram disulfide.

[0012] A method for preparing a sealing ring material comprises the following steps: mixing nitrile rubber and chloroprene rubber and kneading them until they are rolled, adding an accelerator, an antioxidant and an anti-sticking agent for primary kneading, then adding a CNT composite reinforcing agent and a reinforcing filler for secondary kneading, and finally adding a vulcanizing agent to thin and sheet the mixture to obtain the sealing ring material.

[0013] Beneficial effects of the present invention: The invention discloses a CNT composite reinforcing agent suitable for a rubber system. The CNT composite reinforcing agent is prepared by an addition reaction of alkyl mercaptan and diallylamine to obtain an intermediate 1 having a double-branched alkyl chain, and then allyl iodide is substituted with a secondary amine in the intermediate 1 to form a tertiary amine compound, namely, an intermediate 2. Then, 3-chloropropyltrimethoxysilane and the intermediate 2 are subjected to a quaternization reaction to obtain a modifier, and finally the modifier is hydrolyzed and coupled to be loaded on the surface of a carbon nanotube. The carbon nanotube itself has extremely high strength and modulus, and the modifier is introduced into the alkyl chain for modification, so as to improve the dispersibility of the carbon nanotube and facilitate the formation of a uniform reinforcing effect. Compared with the existing coupled carbon nanotube material, Its quaternary ammonium structure and thioether structure promote the vulcanization strengthening of the unsaturated double bonds in its molecules and the rubber matrix, effectively improving the bonding strength between the carbon nanotubes and the rubber matrix, and further enhancing the strengthening effect of the carbon nanotubes. Its double-branched alkyl chains are interspersed between the cross-linked interfaces of the carbon nanotubes and the rubber to form a toughening effect, improving the bonding toughness of the carbon nanotubes and the rubber. When subjected to external forces, the carbon nanotubes and the rubber macromolecules can undergo greater elastic deformation, which on the one hand enables the strength and toughness of the material to be synergistically improved. On the other hand, this elastic deformation gives the material excellent resistance to permanent compression deformation and creep resistance, and has a more stable sealing effect when used in sealing rings. DETAILED DESCRIPTION

[0014] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Example 1, preparing the sealing ring material, the specific implementation process is as follows: (1) Preparation of CNT composite reinforcing agent Step A1: premix diallylamine, benzoyl peroxide and acetone, introduce nitrogen protection, heat to 30°C, apply stirring at 60rpm, assist with 120W / m2 ultraviolet irradiation, slowly add alkyl mercaptan to react for 2.5h, wherein the alkyl mercaptan is selected from n-octyl mercaptan, and the feed ratio of diallylamine, n-octyl mercaptan, benzoyl peroxide and acetone is 0.1mol:0.2mol:0.07g:60mL. After the reaction is completed, 50ppm of sodium sulfite is added to mix and quench, and the acetone is removed by rotary evaporation. The substrate is washed with water and dried to obtain intermediate 1.

[0016] Step A2: Premix the intermediate 1, potassium carbonate, 15-crown ether-5 and tetrahydrofuran, preheat to 30°C, apply stirring at 120rpm, take equal amounts of allyl iodide and divide them into five portions, add them intermittently for 10 minutes, and control the total reaction time of allyl iodine addition to be 2.5 hours. Then continue to heat to 55°C for 1 hour, wherein the feed ratio of intermediate 1, allyl iodine, potassium carbonate, 15-crown ether-5 and tetrahydrofuran is 0.1 mol: 0.1 mol: 0.5 g: 6 mL: 100 mL. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, and the substrate is washed with water and dried to obtain intermediate 2.

[0017] Step A3: Take the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane, mix them, heat them to 90°C, stir them at 30rpm, and reflux them for 20h, wherein the feed ratio of the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane is 0.1mol: 0.105mol: 0.9g: 40mg: 150mL. After the reaction, the dioxane is quickly removed by reduced pressure rotary evaporation to obtain a modifier.

[0018] Step A4: Mix the modifier, dimethylacetamide, ethanol and deionized water, adjust the pH value to 3 with hydrochloric acid, add carbon nanotubes and disperse them ultrasonically, stir for 3 hours, then neutralize with ammonia water and let stand for 24 hours, wherein the carbon nanotubes are selected from TMNPH1 type raw materials, and the feed ratio of carbon nanotubes, modifier, dimethylacetamide, ethanol and deionized water is 10g:0.6g:10mL:10mL:15mL, finally wash and dry the precipitate to obtain a CNT composite reinforcing agent.

[0019] (2) Preparation of sealing ring materials Ingredients: The raw materials are calculated by weight: 100 parts of nitrile rubber, and Nancar®1052 raw material is used in the implementation process; 15 parts of chloroprene rubber, and CR322 raw material is used in the implementation process; 10 parts of CNT composite reinforcing agent, which is homemade in this embodiment; 12 parts of reinforcing filler, and carbon black N330 and carbon black N660 are compounded in a mass ratio of 2:1 in the implementation process; 1.9 parts of vulcanizing agent, and sulfur is used in the implementation process; 1 part of accelerator, and zinc oxide and tetrabenzylthiuram disulfide are compounded in a mass ratio of 5:1 in the implementation process; 2 parts of antioxidant, and antioxidant RD and 85# microcrystalline wax are compounded in a mass ratio of 1:1 in the implementation process; 2.2 parts of anti-adhesive agent, and industrial grade stearic acid is used in the implementation process.

[0020] Mixing: Mix the nitrile rubber and chloroprene rubber at a roller temperature of 60°C until the roller is wrapped, add the accelerator, antioxidant and anti-sticking agent for the first mixing, then add the CNT composite reinforcing agent and reinforcing filler for the second mixing, finally add the vulcanizer and thinly pass four times, and obtain the sealing ring material after sheeting.

[0021] Example 2, preparing the sealing ring material, the specific implementation process is as follows: (1) Preparation of CNT composite reinforcing agent Step A1: premix diallylamine, benzoyl peroxide and acetone, introduce nitrogen protection, heat to 55°C, apply stirring at 90rpm, assist with 200W / m2 ultraviolet irradiation, slowly add alkyl mercaptan to react for 4h, wherein the alkyl mercaptan is selected from n-octadecyl mercaptan, and the feed ratio of diallylamine, n-octadecyl mercaptan, benzoyl peroxide and acetone is 0.1mol:0.2mol:0.11g:120mL. After the reaction is completed, 50ppm of sodium sulfite is added to mix and quench, and acetone is removed by rotary evaporation. The substrate is washed with water and dried to obtain intermediate 1.

[0022] Step A2: pre-mix intermediate 1, potassium carbonate, 15-crown ether-5 and tetrahydrofuran, pre-heat to 40°C, apply stirring at 180rpm, take equal amounts of allyl iodide and divide it into five portions, add it intermittently for 20 minutes, and control the total reaction time of allyl iodine addition to be 4 hours, then continue to heat to 65°C and react for 1.5 hours, wherein the feed ratio of intermediate 1, allyl iodine, potassium carbonate, 15-crown ether-5 and tetrahydrofuran is 0.1 mol: 0.1 mol: 0.8 g: 10 mL: 170 mL, and after the reaction is completed, tetrahydrofuran is removed by rotary evaporation, and the substrate is washed with water and dried to obtain intermediate 2.

[0023] Step A3: Take the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane, mix them, heat them to 100°C, stir them at 50rpm, and reflux them for 30h, wherein the feed ratio of the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane is 0.1mol: 0.11mol: 1.4g: 60mg: 240mL. After the reaction, the dioxane is quickly removed by reduced pressure rotary evaporation to obtain a modifier.

[0024] Step A4: Mix the modifier, dimethylacetamide, ethanol and deionized water, adjust the pH value to 2 with hydrochloric acid, add carbon nanotubes and disperse them ultrasonically, stir for 4 hours, then neutralize with ammonia water and let stand for 24 hours, wherein the carbon nanotubes are selected from TMNPH1 type raw materials, and the feed ratio of carbon nanotubes, modifier, dimethylacetamide, ethanol and deionized water is 10g:0.8g:15mL:20mL:25mL, finally wash and dry the precipitate to obtain a CNT composite reinforcing agent.

[0025] (2) Preparation of sealing ring materials Ingredients: The raw materials are calculated by weight: 100 parts of nitrile rubber, and Nancar®1052 raw material is used in the implementation process; 20 parts of chloroprene rubber, and CR322 raw material is used in the implementation process; 15 parts of CNT composite reinforcing agent, which is homemade in this embodiment; 17 parts of reinforcing filler, and carbon black N330 and carbon black N660 are compounded in a mass ratio of 2:1 in the implementation process; 2.3 parts of vulcanizing agent, and sulfur is used in the implementation process; 1.4 parts of accelerator, and zinc oxide and tetrabenzylthiuram disulfide are compounded in a mass ratio of 5:1 in the implementation process; 3 parts of antioxidant, and antioxidant RD and 85# microcrystalline wax are compounded in a mass ratio of 1:1 in the implementation process; 2.8 parts of anti-adhesive agent, and industrial grade stearic acid is used in the implementation process.

[0026] Mixing: Mix the nitrile rubber and chloroprene rubber at a roller temperature of 60°C until the roller is wrapped, add the accelerator, antioxidant and anti-sticking agent for the first mixing, then add the CNT composite reinforcing agent and reinforcing filler for the second mixing, finally add the vulcanizer and thinly pass four times, and obtain the sealing ring material after sheeting.

[0027] Example 3, preparing the sealing ring material, the specific implementation process is as follows: (1) Preparation of CNT composite reinforcing agent Step A1: premix diallylamine, benzoyl peroxide and acetone, introduce nitrogen protection, heat to 45°C, apply stirring at 90rpm, assist with 150W / m2 ultraviolet irradiation, slowly add alkyl mercaptan to react for 3.2h, wherein the alkyl mercaptan is selected from n-tetradecyl mercaptan, and the feed ratio of diallylamine, n-tetradecyl mercaptan, benzoyl peroxide and acetone is 0.1mol:0.2mol:0.1g:95mL. After the reaction is completed, 50ppm of sodium sulfite is added to mix and quench, and the acetone is removed by rotary evaporation. The substrate is washed with water and dried to obtain intermediate 1.

[0028] Step A2: Pre-mix the intermediate 1, potassium carbonate, 15-crown ether-5 and tetrahydrofuran, pre-heat to 35°C, apply stirring at 180rpm, take equal amounts of allyl iodide and divide it into five portions, add it intermittently for 15 minutes, and control the total reaction time of allyl iodine addition to be 3.5 hours. Then continue to heat to 60°C and react for 1.2 hours. Among them, the feed ratio of intermediate 1, allyl iodine, potassium carbonate, 15-crown ether-5 and tetrahydrofuran is 0.1 mol: 0.1 mol: 0.7 g: 8 mL: 120 mL. After the reaction is completed, tetrahydrofuran is removed by rotary evaporation, and the substrate is washed with water and dried to obtain intermediate 2.

[0029] Step A3: Take the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane, mix them, heat them to 100°C, stir them at 30rpm, and reflux them for 25h, wherein the feed ratio of the intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane is 0.1mol: 0.108mol: 1.1g: 50mg: 220mL. After the reaction, the dioxane is quickly removed by reduced pressure rotary evaporation to obtain a modifier.

[0030] Step A4: Mix the modifier, dimethylacetamide, ethanol and deionized water, adjust the pH value to 3 with hydrochloric acid, add carbon nanotubes and ultrasonically disperse them, stir for 3.5 hours, then neutralize them with ammonia water and let them stand for 24 hours, wherein the carbon nanotubes are selected from TMNPH1 type raw materials, and the feed ratio of carbon nanotubes, modifier, dimethylacetamide, ethanol and deionized water is 10g:0.7g:12mL:15mL:20mL, finally wash and dry the precipitate to obtain a CNT composite reinforcing agent.

[0031] (2) Preparation of sealing ring materials Ingredients: The raw materials are calculated by weight: 100 parts of nitrile rubber, and Nancar®1052 raw material is used in the implementation process; 17 parts of chloroprene rubber, and CR322 raw material is used in the implementation process; 12 parts of CNT composite reinforcing agent, which is homemade in this embodiment; 14 parts of reinforcing filler, and carbon black N330 and carbon black N660 are compounded in a mass ratio of 2:1 in the implementation process; 2.1 parts of vulcanizing agent, and sulfur is used in the implementation process; 1.1 parts of accelerator, and zinc oxide and tetrabenzylthiuram disulfide are compounded in a mass ratio of 5:1 in the implementation process; 2.5 parts of antioxidant, and antioxidant RD and 85# microcrystalline wax are compounded in a mass ratio of 1:1 in the implementation process; 2.4 parts of anti-adhesive agent, and industrial grade stearic acid is used in the implementation process.

[0032] Mixing: Mix the nitrile rubber and chloroprene rubber at a roller temperature of 60°C until the roller is wrapped, add the accelerator, antioxidant and anti-sticking agent for the first mixing, then add the CNT composite reinforcing agent and reinforcing filler for the second mixing, finally add the vulcanizer and thinly pass four times, and obtain the sealing ring material after sheeting.

[0033] Comparative Example 1, referring to Example 3, the CNT composite reinforcing agent is replaced with the same weight portion of carbon nanotubes, and the rest of the implementation process is exactly the same.

[0034] Comparative Example 2, the carbon nanotubes were treated with silane coupling agent KH-570 to replace the CNT composite reinforcing agent, as follows: Silane coupling agent KH-570, ethanol and deionized water are mixed, the pH value is adjusted to 3 with hydrochloric acid, and the mixture is stirred and hydrolyzed at room temperature for 30 minutes. Carbon nanotubes are added and ultrasonically dispersed. After stirring for 3 hours, the mixture is neutralized with ammonia water and allowed to stand for 24 hours. The feed ratio of carbon nanotubes, silane coupling agent KH-570, ethanol and deionized water is 10g:0.6g:20mL:30mL. The precipitate is washed and dried to obtain KH-570 coupled carbon nanotubes. The rest of the implementation process is exactly the same.

[0035] The sealing ring material prepared above was placed in a vulcanizer, and the vulcanization conditions were controlled to be 170℃×10MPa, the vulcanization time was 15min, and the samples were taken after natural placement for 24h. The Shore A hardness of the samples was tested according to GB / T 531.1-2008 standard; the tensile performance of the samples was tested according to GB / T 528-2009 standard, and the tensile rate was 500mm / min; the tear strength of the samples was tested according to GB / T 529-2008 standard; the permanent compression deformation test of the samples was carried out according to GB / T 7759.1-2015 standard, with a compression rate of 30% and a temperature of 80℃; the creep test of the samples was carried out according to GB / T 19242-2003 standard; the specific test results are shown in Table 1: Table 1

[0036] It can be seen from the test results in Table 1 that the sealing ring material prepared in the embodiment has moderate hardness, and has more excellent toughness and tear resistance, especially the permanent deformation and creep amount are significantly reduced, and has more stable sealing performance.

[0037] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A sealing ring material, characterized in that: The composition includes, by weight: 100 parts of nitrile rubber, 15-20 parts of chloroprene rubber, 10-15 parts of CNT composite reinforcing agent, 12-17 parts of reinforcing filler, 1.9-2.3 parts of vulcanizing agent, 1-1.4 parts of accelerator, 2-3 parts of antioxidant and 2.2-2.8 parts of anti-adhesive agent; The CNT composite reinforcing agent is prepared by the following steps: Step A1: premix diallylamine, benzoyl peroxide and acetone, pass nitrogen protection, heat to 30-55°C, stir and irradiate with 120-200W / m2 ultraviolet light, slowly add alkyl mercaptan to react for 2.5-4h, add sodium sulfite to quench the reaction, remove acetone by rotary evaporation, wash the substrate with water and dry it to obtain intermediate 1; Step A2: premix the intermediate 1, potassium carbonate, 15-crown ether-5 and tetrahydrofuran, preheat to 30-40°C, stir and intermittently add allyl iodide to react for 2.5-4h, then continue to heat to 55-65°C to react for 1-1.5h, after the reaction is completed, remove tetrahydrofuran by rotary evaporation, wash the substrate with water and dry it to obtain the intermediate 2; Step A3: Mix the intermediate 2,3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane, raise the temperature to 90-100°C, stir and reflux for 20-30h, and after the reaction, perform vacuum rotary evaporation to quickly remove dioxane to obtain a modifier; Step A4: Mix the modifier, dimethylacetamide, ethanol and deionized water, adjust the pH value to 2-3 with hydrochloric acid, add carbon nanotubes and disperse them ultrasonically, stir for 3-4 hours, then neutralize with ammonia water, let stand for 24 hours, wash and dry the precipitate to obtain a CNT composite reinforcing agent.

2. A sealing ring material according to claim 1, characterized in that: The feed ratio of diallylamine, alkyl mercaptan, benzoyl peroxide and acetone is 0.1 mol: 0.2 mol: 0.07-0.11 g: 60-120 mL.

3. A sealing ring material according to claim 2, characterized in that: The alkyl mercaptan is selected from one of n-octyl mercaptan, n-tetradecyl mercaptan and n-octadecyl mercaptan.

4. A sealing ring material according to claim 2, characterized in that: The feed ratio of intermediate 1, allyl iodide, potassium carbonate, 15-crown ether-5 and tetrahydrofuran is 0.1 mol: 0.1 mol: 0.5-0.8 g: 6-10 mL: 100-170 mL.

5. A sealing ring material according to claim 4, characterized in that: The feed ratio of intermediate 2, 3-chloropropyltrimethoxysilane, potassium iodide, hydroquinone and dioxane is 0.1 mol: 0.105-0.11 mol: 0.9-1.4 g: 40-60 mg: 150-240 mL.

6. A sealing ring material according to claim 5, characterized in that: The feeding ratio of carbon nanotube, modifier, dimethylacetamide, ethanol and deionized water is 10g: 0.6-0.8g: 10-15mL: 10-20mL: 15-25mL.

7. A sealing ring material according to claim 1, characterized in that: The vulcanizing agent is sulfur, and the accelerator is a compound of zinc oxide and tetrabenzylthiuram disulfide.

8. A method for preparing a sealing ring material according to any one of claims 1 to 7, characterized in that: Specifically, nitrile rubber and chloroprene rubber are mixed and kneaded until they are rolled, accelerator, antioxidant and anti-sticking agent are added for primary kneading, then CNT composite reinforcing agent and reinforcing filler are added for secondary kneading, and finally vulcanizer is added to thin and sheet to obtain sealing ring material.

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