Anti-aging rubber product and preparation method thereof

Abstract

The invention discloses an anti-aging rubber product and a preparation method thereof, and belongs to the technical field of rubber product preparation, the anti-aging rubber product comprises the following raw materials by weight: 100-120 parts of styrene butadiene rubber, 2-4 parts of a modified anti-aging agent, 3-5 parts of zinc oxide, 2-3 parts of stearic acid, 2-3 parts of sulfur, and 4-7 parts of a functional reinforcing agent. The macromolecular modified anti-aging agent capable of being crosslinked and entangled with a butadiene styrene rubber molecular chain is introduced, so that the intermolecular acting force of the modified anti-aging agent and the butadiene styrene rubber is enhanced, and the defects that a small-molecular-weight anti-aging agent is easy to migrate and volatilize from a butadiene styrene rubber matrix in a high-temperature environment, a blooming phenomenon is generated and the like are effectively overcome; meanwhile, the introduction of the functional reinforcing agent effectively improves the mechanical strength and the anti-aging time of the rubber product, and through the synergistic effect of the functional reinforcing agent and the rubber product, the anti-aging performance of the rubber product is further enhanced, and the service life of the rubber product is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber product preparation, and in particular relates to an aging-resistant rubber product and a preparation method thereof. Background Art

[0002] As an important type of polymer material, rubber products are widely used in national defense, military industry, daily life and other fields due to their unique comprehensive properties such as high elasticity and wear resistance. However, their molecular chains contain a large number of isolated double bonds, which are very easy to age under heat, oxygen, light and stress conditions, causing rubber products to fail prematurely during service, reducing the service life of rubber products, and even causing safety accidents in severe cases.

[0003] At present, adding antioxidants is the most convenient and effective way to delay rubber aging. However, most antioxidants and additives are small molecule compounds with low molecular weight. In a high temperature environment, they are easy to migrate and volatilize from the rubber matrix, and also cause "frost" on the surface of rubber products. This not only reduces the protective effect of the antioxidant, but also causes harm to the human body and the environment, limiting the application of antioxidants in the aging resistance of rubber products. Therefore, how to effectively improve the problem of easy migration of antioxidants in rubber products, increase the anti-aging time of rubber products, and extend the service life is a technical problem that needs to be solved at present. Summary of the invention

[0004] The object of the present invention is to provide an aging-resistant rubber product and a preparation method thereof, so as to solve the problems in the background technology.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An aging-resistant rubber product comprises the following raw materials in parts by weight:

[0007] 100-120 parts of styrene-butadiene rubber, 2-4 parts of modified antioxidant, 3-5 parts of zinc oxide, 2-3 parts of stearic acid, 2-3 parts of sulfur, 4-7 parts of functional reinforcing agent;

[0008] The modified antioxidant is prepared by the following steps:

[0009] A1. Add N-(4-phenylaminophenyl)maleimide to tetrahydrofuran, dissolve it by ultrasonication, add 2-mercaptobenzothiazole and triethylamine, mix well, react under nitrogen atmosphere at 50-60° C. with stirring for 7-8 hours, and then perform rotary evaporation after cooling. Then, place the mixture in an excess of sodium hydroxide solution, stir and precipitate, and then filter, wash with deionized water, and dry to obtain an intermediate.

[0010] A2. Add chitosan and the intermediate to dimethyl sulfoxide under nitrogen protection, stir and dissolve, then drop a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine, control the dropping time to be 0.5-1h, continue the reaction at 40-50°C for 22-24h, filter and extract the filtrate with a large amount of ether, collect the lower layer solution, wash with deionized water to remove the ether, and then dry at 40°C to obtain a modified antioxidant;

[0011] The invention uses N-(4-phenylaminophenyl) maleimide as a main antioxidant, and carries out a mercapto-ene reaction with a vulcanization accelerator 2-mercaptobenzothiazole under the catalytic action of triethylamine to synthesize an anti-aging intermediate with a vulcanization accelerating function, and then under the catalytic action of dicyclohexylcarbodiimide and 4-dimethylaminopyridine, an amino group in the intermediate molecule reacts with a hydroxyl group in a chitosan molecule to form an amide bond, and the intermediate is grafted into the chitosan molecule to obtain a modified antioxidant with a large molecular weight containing a benzene ring, a carbonyl group, an amino group, and the like.

[0012] Furthermore, the usage ratio of tetrahydrofuran, N-(4-phenylaminophenyl)maleimide, 2-mercaptobenzothiazole and triethylamine is 120mL:4.3-6g:3.7-4.2g:1.6mL; and the concentration of the sodium hydroxide solution is 1wt%.

[0013] Furthermore, the dosage ratio of the mixed solution of dimethyl sulfoxide, chitosan, intermediate, dicyclohexylcarbodiimide and 4-dimethylaminopyridine is 150mL: 2-3g: 8-10g: 25mL; the mixed solution of dicyclohexylcarbodiimide and 4-dimethylaminopyridine is prepared by dissolving dicyclohexylcarbodiimide and 4-dimethylaminopyridine in 25mL of dimethyl sulfoxide according to the dosage ratio of 5-7mL: 0.8g.

[0014] Furthermore, the functional reinforcing agent is prepared by the following steps:

[0015] Add sodium methacrylate to deionized water, stir to dissolve, add halloysite nanotubes, vacuum stir for 15-20 minutes, stir at normal pressure for 30-40 minutes, repeat vacuum stirring and normal pressure stirring for 3 times, add zinc chloride solution, mix well, vacuum stir for 15-20 minutes, stir at normal pressure for 30-40 minutes, repeat vacuum stirring and normal pressure stirring for 3 times, centrifuge to retain solids, wash with anhydrous ethanol, and dry to obtain a functional reinforcing agent;

[0016] The present invention uses halloysite nanotubes as reinforcing fillers for rubber products. The halloysite nanotubes have good orientation and interface, can prevent cracks from being generated when the rubber is subjected to stress, and give the rubber product good mechanical strength. At the same time, the halloysite nanotubes have a large specific surface area and excellent adsorption capacity, and can provide a loading space for small molecule additives. Therefore, zinc methacrylate is generated on the surface of the halloysite nanotubes through an ion exchange reaction, and at the same time, methacrylate ions and zinc ions are absorbed into the tube cavity of the halloysite nanotubes under the action of atmospheric pressure difference, and zinc methacrylate is synthesized in situ on the inner wall of the tube cavity, thereby obtaining a functional reinforcing agent in which the halloysite nanotubes load zinc methacrylate.

[0017] Furthermore, the usage ratio of the deionized water, sodium methacrylate, halloysite nanotubes and zinc chloride solution is 100 mL: 3-4 g: 8-10 g: 30 mL.

[0018] Furthermore, the zinc chloride solution is prepared by dissolving zinc chloride and 5wt% dilute hydrochloric acid in 30mL of deionized water in a dosage ratio of 1.5-2g:0.05-0.5mL.

[0019] A method for preparing an aging-resistant rubber product comprises the following steps:

[0020] Put the styrene-butadiene rubber in an open mill and pass it thinly for 7-8 times, then add modified antioxidant, zinc oxide, stearic acid, sulfur and functional reinforcing agent in turn, mix evenly, then put it in a flat vulcanizer and set the vulcanization temperature to 160°C and the vulcanization time to Tc90 (i.e. the time required to reach 90% of the vulcanization state), perform hot press vulcanization, and after cooling, obtain an aging-resistant rubber product.

[0021] Beneficial effects of the present invention:

[0022] The modified antioxidant of the present invention contains a benzene ring in its macromolecular structure. When vulcanized with styrene-butadiene rubber, it can be cross-linked and entangled with the styrene-butadiene rubber molecular chain through π-π non-covalent bonds, thereby improving the compatibility of the modified antioxidant with the styrene-butadiene rubber. At the same time, the modified antioxidant molecules also contain thiazole and amide groups that promote rubber vulcanization, thereby improving the cross-linking density between the modified antioxidant and the rubber and enhancing the intermolecular force between the modified antioxidant and the styrene-butadiene rubber. In addition, groups such as -NH and -OH in the modified antioxidant molecules can provide active hydrogen, capture peroxy free radicals generated during the aging process of rubber products, terminate the free radical chain reaction triggered by the aging process, and form a stable coupling structure with free radicals dissociating hydrogen in the modified antioxidant molecules at the break of the molecular chain, thereby giving the rubber products good anti-aging performance.

[0023] At the same time, the functional reinforcing agent of the present invention contains silanol on its surface, which can form hydrogen bonds with carbonyl groups in the rubber matrix during the vulcanization process, thereby improving the dispersibility and interfacial bonding strength of the functional reinforcing agent and the rubber matrix. When subjected to external force, the stress can be dissipated through the breaking and reconstruction of hydrogen bonds, thereby improving the tensile strength of the rubber product. In addition, the outer wall and inner wall of the tubular cavity of the functional reinforcing agent are also loaded with zinc methacrylate. On the one hand, the loading can also prevent the zinc methacrylate from migrating from the rubber product to cause the "frosting" phenomenon. On the other hand, zinc methacrylate is an unsaturated carboxylic acid metal salt. During the rubber vulcanization process, the zinc methacrylate on the outer wall of the tubular cavity can serve as a rubber vulcanizing agent, thereby improving the crosslinking density of the rubber and enhancing the elasticity of the rubber product. When the rubber product ages, the zinc ions of the zinc methacrylate on the inner wall of the tubular cavity can be slowly released to quench free radicals, thereby playing a role of slow release and extending the anti-aging time, thereby further enhancing the anti-aging performance of the rubber product.

[0024] The invention introduces a macromolecular modified antioxidant that can be cross-linked and entangled with the molecular chain of styrene-butadiene rubber to enhance the intermolecular force between the modified antioxidant and the styrene-butadiene rubber, thereby effectively improving the shortcomings of the small molecular weight antioxidant being easy to migrate and volatilize from the styrene-butadiene rubber matrix under a high temperature environment and producing a "frosting" phenomenon. At the same time, the introduction of the functional reinforcing agent effectively improves the mechanical strength and anti-aging time of the rubber product. Through the synergistic effect of the two, the aging resistance of the rubber product is further enhanced, and the service life of the rubber product is extended. DETAILED DESCRIPTION

[0025] 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.

[0026] Example 1

[0027] This embodiment provides a modified antioxidant, which is prepared by the following steps:

[0028] A1. Add 4.3 g of N-(4-phenylaminophenyl)maleimide to 120 mL of tetrahydrofuran, dissolve it by ultrasonication, add 3.7 g of 2-mercaptobenzothiazole and 1.6 mL of triethylamine, mix well, react under nitrogen atmosphere at 50 ° C for 7 h, and perform rotary evaporation after cooling. Then, place it in 500 mL of 1 wt% sodium hydroxide solution, stir and precipitate it, and then filter, wash with deionized water, and dry it to obtain an intermediate;

[0029] A2, add 5 mL of dicyclohexylcarbodiimide and 0.8 g of 4-dimethylaminopyridine to 25 mL of dimethyl sulfoxide, stir and dissolve to obtain a mixed solution of dicyclohexylcarbodiimide and 4-dimethylaminopyridine;

[0030] A3. Add 2g chitosan and 8g intermediate to 150mL dimethyl sulfoxide under nitrogen protection, stir to dissolve, then add 25mL of a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine dropwise, control the addition time to be 0.5h, continue the reaction at 40°C for 22h after the addition is completed, filter and extract the filtrate with 500mL of ether, collect the lower solution, wash with deionized water and dry to obtain a modified antioxidant.

[0031] Example 2

[0032] This embodiment provides a modified antioxidant, which is prepared by the following steps:

[0033] A1. Add 5.2 g of N-(4-phenylaminophenyl)maleimide to 120 mL of tetrahydrofuran, dissolve it by ultrasonication, add 3.9 g of 2-mercaptobenzothiazole and 1.6 mL of triethylamine, mix well, stir and react for 7.5 h under nitrogen atmosphere at 55 ° C, cool and perform rotary evaporation, then place in 500 mL of 1 wt% sodium hydroxide solution, stir and precipitate, filter, wash with deionized water, and dry to obtain an intermediate;

[0034] A2. Add 6 mL of dicyclohexylcarbodiimide and 0.8 g of 4-dimethylaminopyridine to 25 mL of dimethyl sulfoxide, and stir to dissolve to obtain a mixed solution of dicyclohexylcarbodiimide and 4-dimethylaminopyridine;

[0035] A3. Add 2.5g chitosan and 9g intermediate to 150mL dimethyl sulfoxide under nitrogen protection, stir to dissolve, then add 25mL of a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine dropwise, control the addition time to be 0.8h, continue the reaction at 45°C for 23h after the addition is completed, filter and extract the filtrate with 500mL of ether, collect the lower solution, wash with deionized water and dry to obtain a modified antioxidant.

[0036] Example 3

[0037] This embodiment provides a modified antioxidant, which is prepared by the following steps:

[0038] A1. Add 6 g of N-(4-phenylaminophenyl)maleimide to 120 mL of tetrahydrofuran, dissolve it by ultrasonication, add 4.2 g of 2-mercaptobenzothiazole and 1.6 mL of triethylamine, mix well, stir and react for 8 h under nitrogen atmosphere at 60 ° C, cool and perform rotary evaporation, then place in 500 mL of 1 wt% sodium hydroxide solution, stir and precipitate, filter, wash with deionized water, and dry to obtain an intermediate;

[0039] A2. Add 7 mL of dicyclohexylcarbodiimide and 0.8 g of 4-dimethylaminopyridine to 25 mL of dimethyl sulfoxide, and stir to dissolve to obtain a mixed solution of dicyclohexylcarbodiimide and 4-dimethylaminopyridine;

[0040] A3. Add 3g chitosan and 10g intermediate to 150mL dimethyl sulfoxide under nitrogen protection, stir to dissolve, then add 25mL of a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine dropwise, control the addition time to be 1h, continue the reaction at 50°C for 24h after the addition is completed, filter and extract the filtrate with 500mL of ether, collect the lower solution, wash with deionized water and dry to obtain a modified antioxidant.

[0041] Comparative Example 1

[0042] Compared with Example 1, the difference is that the intermediate is replaced by antioxidant 4020 in equal amount, and the other raw materials and steps are the same.

[0043] Example 4

[0044] This embodiment provides a functional reinforcing agent, which is prepared by the following steps:

[0045] B1. Add 1.5 g of zinc chloride and 0.05 mL of 5 wt% dilute hydrochloric acid to 30 mL of deionized water, stir and mix to obtain a zinc chloride solution;

[0046] B2. Add 3 g of sodium methacrylate to 100 mL of deionized water, stir to dissolve, add 8 g of halloysite nanotubes, vacuum stir for 15 min, stir at normal pressure for 30 min, repeat the stirring operation 3 times, then add 30 mL of zinc chloride solution, mix well, vacuum stir for 15 min, stir at normal pressure for 30 min, repeat the stirring operation 3 times, centrifuge to retain the solid, wash with anhydrous ethanol, and dry to obtain a functional reinforcing agent.

[0047] Example 5

[0048] This embodiment provides a functional reinforcing agent, which is prepared by the following steps:

[0049] B1. Add 1.8 g of zinc chloride and 0.3 mL of 5 wt% dilute hydrochloric acid to 30 mL of deionized water, stir and mix to obtain a zinc chloride solution;

[0050] B2. Add 3.5 g of sodium methacrylate to 100 mL of deionized water, stir to dissolve, add 9 g of halloysite nanotubes, vacuum stir for 18 min, stir at normal pressure for 35 min, repeat the stirring operation 3 times, then add 30 mL of zinc chloride solution, mix well, vacuum stir for 18 min, stir at normal pressure for 35 min, repeat the stirring operation 3 times, centrifuge to retain the solid, wash with anhydrous ethanol, and dry to obtain a functional reinforcing agent.

[0051] Example 6

[0052] This embodiment provides a functional reinforcing agent, which is prepared by the following steps:

[0053] B1. Add 2 g of zinc chloride and 0.5 mL of 5 wt% dilute hydrochloric acid to 30 mL of deionized water, stir and mix to obtain a zinc chloride solution;

[0054] B2. Add 4 g of sodium methacrylate to 100 mL of deionized water, stir to dissolve, add 10 g of halloysite nanotubes, vacuum stir for 20 min, stir at normal pressure for 40 min, repeat the stirring operation 3 times, then add 30 mL of zinc chloride solution, mix well, vacuum stir for 20 min, stir at normal pressure for 40 min, repeat the stirring operation 3 times, centrifuge to retain the solid, wash with anhydrous ethanol, and dry to obtain a functional reinforcing agent.

[0055] Example 7

[0056] This embodiment provides an aging-resistant rubber product, which is prepared by the following steps:

[0057] 100 parts by weight of styrene-butadiene rubber were placed in an open mill and thinly passed 7 times, and then 2 parts by weight of the modified antioxidant prepared in Example 1, 3 parts by weight of zinc oxide, 2 parts by weight of stearic acid, 2 parts by weight of sulfur, and 4 parts by weight of the functional reinforcing agent prepared in Example 4 were added in sequence, mixed evenly, and then placed in a flat-plate vulcanizer and set the vulcanization temperature to 160° C. and the vulcanization time to Tc90, and hot-pressed vulcanization was performed. After cooling, an aging-resistant rubber product was obtained.

[0058] Example 8

[0059] This embodiment provides an aging-resistant rubber product, which is prepared by the following steps:

[0060] 110 parts by weight of styrene-butadiene rubber were placed in an open mill and thinly passed 7 times, and then 3 parts by weight of the modified antioxidant prepared in Example 2, 4 parts by weight of zinc oxide, 2.5 parts by weight of stearic acid, 2.8 parts by weight of sulfur, and 5 parts by weight of the functional reinforcing agent prepared in Example 5 were added in sequence, mixed evenly, and then placed in a flat vulcanizer and set the vulcanization temperature to 160° C. and the vulcanization time to Tc90, and hot-pressed vulcanization was performed. After cooling, an aging-resistant rubber product was obtained.

[0061] Example 9

[0062] This embodiment provides an aging-resistant rubber product, which is prepared by the following steps:

[0063] 120 parts by weight of styrene-butadiene rubber were placed in an open mill and thinned 8 times, and then 4 parts by weight of the modified antioxidant prepared in Example 3, 5 parts by weight of zinc oxide, 3 parts by weight of stearic acid, 3 parts by weight of sulfur, and 7 parts by weight of the functional reinforcing agent prepared in Example 6 were added in sequence, mixed evenly, and then placed in a flat-plate vulcanizer and set the vulcanization temperature to 160° C. and the vulcanization time to Tc90, and hot-pressed vulcanization was performed. After cooling, an aging-resistant rubber product was obtained.

[0064] Comparative Example 2

[0065] Compared with Example 7, the difference is that the modified antioxidant prepared in Comparative Example 1 is used, and the other raw materials and steps are the same.

[0066] Comparative Example 3

[0067] Compared with Example 7, the difference is that the modified antioxidant prepared in Example 1 is replaced by an equal amount of a commercially available amine antioxidant, and the other raw materials and steps are the same.

[0068] Comparative Example 4

[0069] Compared with Example 7, the difference is that the functional reinforcing agent prepared in Example 4 is replaced by white carbon black in equal amount, and the other raw materials and steps are the same.

[0070] Performance tests were performed on Examples 7 to 9 and Comparative Examples 2 to 4. Aging resistance test: refer to GB / T 3512-2001, set the temperature to 100°C, the aging time to 7 days, and test the elongation at break of hot air aging; tensile strength and elongation at break: refer to GB / T 528-2009; the results are shown in Table 1:

[0071] Table 1

[0072]

[0073] It can be seen from Table 1 that the elongation at break of the rubber products prepared from the modified antioxidant and the functional reinforcing agent in Examples 7-9 before and after aging are higher than those in Comparative Examples 2-4, and have good aging resistance, and the tensile strength can reach up to 28.9 MPa, and has good mechanical strength; in addition, compared with Comparative Examples 2 and 4, the elongation at break retention rate of Example 7 after aging for seven days is maintained at a maximum of 96%, indicating that the rubber products prepared by the synergy of the modified antioxidant and the functional reinforcing agent have better anti-aging performance and a longer service life.

[0074] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aging-resistant rubber product, characterized in that: It includes the following raw materials in parts by weight: 100-120 parts of styrene-butadiene rubber, 2-4 parts of modified antioxidant, 3-5 parts of zinc oxide, 2-3 parts of stearic acid, 2-3 parts of sulfur, 4-7 parts of functional reinforcing agent; The modified antioxidant is prepared by the following steps: A1. Add N-(4-phenylaminophenyl)maleimide to tetrahydrofuran, dissolve it by ultrasonication, add 2-mercaptobenzothiazole and triethylamine, mix well, react under nitrogen atmosphere at 50-60° C. with stirring for 7-8 hours, and then perform rotary evaporation after cooling. Then, place the mixture in an excess of sodium hydroxide solution, stir and precipitate, and then filter, wash with deionized water, and dry to obtain an intermediate. A2. Add chitosan and the intermediate to dimethyl sulfoxide under nitrogen protection, stir to dissolve, then drop a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine, control the dropping time to be 0.5-1h, continue the reaction at 40-50°C for 22-24h, filter and extract the filtrate with a large amount of ether, collect the lower solution, wash with deionized water and dry to obtain a modified antioxidant.

2. The aging-resistant rubber product according to claim 1, characterized in that: The usage ratio of tetrahydrofuran, N-(4-phenylaminophenyl)maleimide, 2-mercaptobenzothiazole and triethylamine is 120mL:4.3-6g:3.7-4.2g:1.6mL.

3. The aging-resistant rubber product according to claim 1, characterized in that: The dosage ratio of the mixed solution of dimethyl sulfoxide, chitosan, intermediate, dicyclohexylcarbodiimide and 4-dimethylaminopyridine is 150mL: 2-3g: 8-10g: 25mL; the mixed solution of dicyclohexylcarbodiimide and 4-dimethylaminopyridine is prepared by dissolving dicyclohexylcarbodiimide and 4-dimethylaminopyridine in 25mL of dimethyl sulfoxide according to the dosage ratio of 5-7mL: 0.8g.

4. The aging-resistant rubber product according to claim 1, characterized in that: The functional reinforcing agent is prepared by the following steps: Sodium methacrylate is added to deionized water, stirred to dissolve, halloysite nanotubes are added, vacuum stirring is performed for 15-20 minutes, and then stirring is performed at normal pressure for 30-40 minutes, and the vacuum stirring and normal pressure stirring operations are repeated 3 times, and then zinc chloride solution is added, mixed evenly, vacuum stirring is performed for 15-20 minutes, and stirring is performed at normal pressure for 30-40 minutes, and the vacuum stirring and normal pressure stirring operations are repeated 3 times, and solids are retained by centrifugation, and then washed with anhydrous ethanol and dried to obtain a functional reinforcing agent.

5. The aging-resistant rubber product according to claim 4, characterized in that: The usage ratio of the deionized water, sodium methacrylate, halloysite nanotubes and zinc chloride solution is 100 mL: 3-4 g: 8-10 g: 30 mL.

6. The aging-resistant rubber product according to claim 4, characterized in that: The zinc chloride solution is prepared by dissolving zinc chloride and 5wt% dilute hydrochloric acid in 30mL of deionized water in a dosage ratio of 1.5-2g:0.05-0.5mL.

7. The method for preparing an aging-resistant rubber product according to claim 1, characterized in that: The following steps are involved: Put the styrene-butadiene rubber in an open mill and pass it thinly for 7-8 times, then add modified antioxidant, zinc oxide, stearic acid, sulfur and functional reinforcing agent in turn, mix evenly, then put it in a flat vulcanizer and set the vulcanization temperature to 160°C and the vulcanization time to Tc90, perform hot press vulcanization, and after cooling, obtain an aging-resistant rubber product.

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