Aging-resistant ethylene-propylene-diene rubber product and method of making the same

Abstract

The application relates to the technical field of ethylene-propylene-diene rubber, and particularly discloses an aging-resistant ethylene-propylene-diene rubber product which comprises the following raw materials in parts by weight: ethylene-propylene-diene rubber 25-30 parts, zinc oxide 5-8 parts, an accelerator 3-5 parts, stearic acid 3-5 parts, white carbon black 2-4 parts, bentonite 8-12 parts, nano-silicon dioxide 5-9 parts and wollastonite 5-9 parts. The aging-resistant ethylene-propylene-diene rubber product is prepared by using ethylene-propylene-diene rubber, zinc oxide, an accelerator, stearic acid and white carbon black as raw materials, and by adding bentonite, nano-silicon dioxide and wollastonite, and by using the two in combination, the product can realize the coordinated improvement of the elastic property, the wear resistance and the aging resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rubber products, in particular to a kind of aging-resistant ethylene-propylene-diene rubber product and preparation method thereof. BACKGROUND

[0002] Ethylene-propylene-diene is the terpolymer of ethylene, propylene and non-conjugated diene, and diene has a special structure, only one of the two bonds can be copolymerized, and the unsaturated double bond is mainly used as a crosslinking site, and the other unsaturated bond will not become the main chain of polymer, but only side chain;The main polymer chain of ethylene-propylene-diene is completely saturated;This feature makes ethylene-propylene-diene resistant to heat, light, oxygen, especially ozone, ethylene-propylene-diene is essentially non-polar, resistant to polar solutions and chemicals, low water absorption, and has good insulation properties;During the production of ethylene-propylene-diene, the properties can be adjusted by changing the amount of three monomers, the ratio of ethylene to propylene, the molecular weight and its distribution, and the vulcanization method.

[0003] The existing ethylene-propylene-diene rubber product improves the aging resistance, and the elastic performance and wear resistance of the product are poor, so it is difficult to improve the coordination of the elastic performance, wear resistance and aging resistance of the product, and the use efficiency of the product is limited. SUMMARY

[0004] In view of the defects of the prior art, the purpose of the present application is to provide an aging-resistant ethylene-propylene-diene rubber product and a preparation method thereof to solve the problems in the background art.

[0005] The technical problem of the present application is solved by the following technical scheme:

[0006] The present application provides an aging-resistant ethylene-propylene-diene rubber product, which comprises the following raw materials by weight:

[0007] Ethylene-propylene-diene rubber 25-30 parts, zinc oxide 5-8 parts, accelerator 3-5 parts, stearic acid 3-5 parts, white carbon black 2-4 parts, bentonite additive 8-12 parts, nano-silicon dioxide and wollastonite agent 5-9 parts.

[0008] Preferably, the ethylene-propylene-diene rubber product comprises the following raw materials by weight:

[0009] Ethylene-propylene-diene rubber 27.5 parts, zinc oxide 6.5 parts, accelerator 4 parts, stearic acid 4 parts, white carbon black 3 parts, bentonite additive 10 parts, nano-silicon dioxide and wollastonite agent 7 parts.

[0010] Preferably, the accelerator is one or a combination of accelerator TMTD, accelerator DTDM and accelerator M.

[0011] Preferably, the preparation method of the bentonite additive is:

[0012] S01: The bentonite is first placed in a sufficient amount of 2% mass fraction hydrochloric acid solution and stirred uniformly, then washed with water and dried, and then the dried bentonite is first placed in a heat treatment at 310-320℃ for 10-20min, then cooled to 135-145℃ at a rate of 2-5℃ / min, and then incubated, and then air-cooled to room temperature.

[0013] S02: 3-5 parts of a 4-6% mass fraction chitosan solution, 1-2 parts of a yttrium nitrate solution, and 1-2 parts of hydroxyacetic acid and 0.5-0.7 parts of sodium lignosulfonate, and 1-2 parts of modified soybean protein powder are added to a 10% mass fraction sodium citrate solution, stirred and mixed uniformly, and then the resulting solution is obtained.

[0014] S03: The bentonite of S01 and the solution are ball milled at a weight ratio of 5:2, the ball milling speed is 1000-1500r / min, and the ball milling time is 1-2h. After ball milling, the mixture is washed with water and dried to obtain the bentonite effector.

[0015] Preferably, the mass fraction of the yttrium nitrate solution is 2-5%.

[0016] Preferably, the preparation method of the modified soybean protein powder is as follows: soybean protein powder, 5% mass fraction lanthanum chloride solution, and oxalic acid are stirred and reacted at a weight ratio of 2:5:1, and then the mixture is washed with water and dried to obtain the modified soybean protein powder.

[0017] Preferably, the stirring temperature of the stirring and reaction treatment is 48-52℃, the stirring time is 1-2h, and the stirring speed is 500-700r / min.

[0018] Preferably, the preparation method of the nano-silicon dioxide and wollastonite agent is as follows:

[0019] S01: 2-4 parts of nano-silicon sol, 1-3 parts of sodium dodecylbenzenesulfonate, 4-7 parts of wollastonite, 10-15 parts of silane coupling agent solution, and 1-2 parts of barium nitrate aqueous solution are stirred and mixed uniformly to obtain a wollastonite solution;

[0020] S02: Nano-silicon dioxide is added to the wollastonite solution at a weight ratio of 1:5 and ultrasonically dispersed for 1-2h at an ultrasonic power of 350-450W. After ultrasonic treatment, the mixture is washed with water and dried to obtain the nano-silicon dioxide and wollastonite agent.

[0021] Preferably, the silane coupling agent solution is prepared by hydrolyzing silane coupling agent KH560, isopropyl alcohol, and water at a weight ratio of 1:1:2 for 35-45min at a hydrolysis temperature of 45-48℃ and a hydrolysis pH of 7.5.

[0022] Preferably, the mass fraction of the aqueous barium nitrate solution is 4-8%.

[0023] The application also provides a preparation method of the aging-resistant EPDM product, comprising the following steps:

[0024] Step one, the raw materials are weighed according to the weight parts:

[0025] Step two, the raw materials are sequentially added into a banbury mixer for banburying, the banburying temperature is 110-120 DEG C, and the banburying time is 10-15 min;

[0026] Step three, then vulcanization treatment is carried out, the vulcanization temperature is 220 DEG C, the vulcanization time is 10-20 min, after the vulcanization is completed, cooling is carried out, and thus the aging-resistant EPDM product is obtained.

[0027] Compared with the prior art, the application has the following beneficial effects:

[0028] The aging-resistant EPDM product is prepared by using EPDM, zinc oxide, accelerator, stearic acid and white carbon black as raw materials, and by adding bentonite effector, nano-silicon dioxide and wollastonite agent, and by using the two in combination, the product can realize the coordinated improvement of the elastic property, wear resistance and aging resistance. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0030] The aging-resistant EPDM product in the embodiment comprises the following raw materials in weight parts:

[0031] EPDM 25-30 parts, zinc oxide 5-8 parts, accelerator 3-5 parts, stearic acid 3-5 parts, white carbon black 2-4 parts, bentonite effector 8-12 parts, nano-silicon dioxide and wollastonite agent 5-9 parts.

[0032] Preferably, the EPDM product comprises the following raw materials in weight parts:

[0033] EPDM 27.5 parts, zinc oxide 6.5 parts, accelerator 4 parts, stearic acid 4 parts, white carbon black 3 parts, bentonite effector 10 parts, nano-silicon dioxide and wollastonite agent 7 parts.

[0034] The accelerator in the embodiment is one or more combinations of accelerator TMTD, accelerator DTDM and accelerator M.

[0035] The preparation method of the bentonite improver of the embodiment is as follows:

[0036] S01: the bentonite is first stirred in a sufficient amount of 2% hydrochloric acid solution, then washed with water and dried, and then the dried bentonite is first heated at 310-320℃ for 10-20 min, then cooled to 135-145℃ at a rate of 2-5℃ / min, and then kept warm, and then air-cooled to room temperature;

[0037] S02: 3-5 parts of a 4-6% chitosan solution, 1-2 parts of a yttrium nitrate solution, 1-2 parts of hydroxyacetic acid, 0.5-0.7 parts of sodium lignosulfonate, and 1-2 parts of modified soybean protein powder are added to a 10% sodium citrate solution and stirred to obtain an improver solution;

[0038] S03: the bentonite of S01 and the improver solution are ball milled at a weight ratio of 5:2, the ball milling speed is 1000-1500 r / min, and the ball milling time is 1-2 h. After ball milling, the mixture is washed with water and dried to obtain the bentonite improver.

[0039] The yttrium nitrate solution of the embodiment has a mass fraction of 2-5%.

[0040] The preparation method of the modified soybean protein powder of the embodiment is as follows: soybean protein powder, 5% lanthanum chloride solution, and oxalic acid are stirred and reacted at a weight ratio of 2:5:1, and then washed with water and dried to obtain the modified soybean protein powder.

[0041] The stirring temperature of the stirring and reaction process of the embodiment is 48-52℃, the stirring time is 1-2 h, and the stirring speed is 500-700 r / min.

[0042] The preparation method of the nano-silicon dioxide and wollastonite agent of the embodiment is as follows:

[0043] S01: 2-4 parts of nano-silicon sol, 1-3 parts of sodium dodecyl benzene sulfonate, 4-7 parts of wollastonite, 10-15 parts of silane coupling agent solution, and 1-2 parts of barium nitrate aqueous solution are stirred and mixed to obtain a wollastonite solution;

[0044] S02: nano-silicon dioxide is added to the wollastonite solution at a weight ratio of 1:5 for ultrasonic dispersion treatment, the ultrasonic power is 350-450 W, the ultrasonic time is 1-2 h, and after ultrasonic treatment, the mixture is washed with water and dried to obtain the nano-silicon dioxide and wollastonite agent.

[0045] The silane coupling agent solution of the embodiment is prepared by hydrolyzing silane coupling agent KH560, isopropyl alcohol, and water at a weight ratio of 1:1:2, the hydrolysis time is 35-45 min, the hydrolysis temperature is 45-48℃, and the hydrolysis pH value is 7.5.

[0046] The mass fraction of the barium nitrate aqueous solution of the embodiment is 4-8%.

[0047] The preparation method of the aging-resistant EPDM product of the embodiment comprises the following steps:

[0048] Step one, the raw materials are weighed according to the weight parts:

[0049] Step two, the raw materials are sequentially added to the internal mixer for internal mixing, the internal mixing temperature is 110-120 DEG C, and the internal mixing time is 10-15 min;

[0050] Step three, then vulcanization treatment is performed, the vulcanization temperature is 220 DEG C, the vulcanization time is 10-20 min, after the vulcanization is completed, cooling is performed, and thus the aging-resistant EPDM product of the embodiment is obtained.

[0051] Embodiment 1.

[0052] The aging-resistant EPDM product of the embodiment comprises the following raw materials in weight parts:

[0053] The EPDM is 25 parts, the zinc oxide is 5 parts, the accelerator is 3 parts, the stearic acid is 3 parts, the white carbon black is 2 parts, the bentonite improver is 8 parts, and the nano-silicon dioxide and wollastonite agent is 5 parts.

[0054] The accelerator of the embodiment is the accelerator TMTD.

[0055] The preparation method of the bentonite improver of the embodiment is as follows:

[0056] S01: the bentonite is first stirred in a sufficient amount of 2% mass fraction hydrochloric acid solution, then washed with water and dried, the dried bentonite is first heated at 310 DEG C for 10 min, then cooled to 135 DEG C at a rate of 2 DEG C / min, and then kept warm, and finally air-cooled to room temperature;

[0057] S02: 3 parts of 4% mass fraction chitosan solution, 1 part of yttrium nitrate solution, 1 part of hydroxyacetic acid, 0.5 parts of sodium lignosulfonate, and 1 part of modified soybean protein powder are added to 10% mass fraction sodium citrate solution, stirred and mixed, and then the mixture is stirred and mixed to obtain the improver liquid;

[0058] S03: the bentonite of S01 and the improver liquid are ball milled at a weight ratio of 5:2, the ball milling speed is 1000 r / min, the ball milling time is 1 h, after the ball milling is completed, the mixture is washed with water and dried, and thus the bentonite improver is obtained.

[0059] The mass fraction of the yttrium nitrate solution of the embodiment is 2%.

[0060] The preparation method of the modified soybean protein powder in the embodiment is as follows: the soybean protein powder, a 5% lanthanum chloride solution and oxalic acid are stirred and reacted according to a weight ratio of 2:5:1, after the stirring is completed, water washing and drying are performed to obtain the modified soybean protein powder.

[0061] The stirring temperature of the stirring and reaction treatment in the embodiment is 48 DEG C, the stirring time is 1h, and the stirring speed is 500r / min.

[0062] The preparation method of the nano-silicon dioxide and wollastonite agent in the embodiment is as follows:

[0063] S01: 2 parts of nano-silicon sol, 1 part of sodium dodecyl benzene sulfonate, 4 parts of wollastonite and 10 parts of silane coupling agent solution, and 1 part of barium nitrate aqueous solution are stirred and uniformly mixed to obtain a wollastonite solution;

[0064] S02: nano-silicon dioxide is added into the wollastonite solution according to a weight ratio of 1:5 for ultrasonic dispersion treatment, the ultrasonic power is 350W, the ultrasonic time is 1h, after the ultrasonic treatment is completed, water washing and drying are performed to obtain the nano-silicon dioxide and wollastonite agent.

[0065] The silane coupling agent solution in the embodiment is prepared by hydrolysis of silane coupling agent KH560, isopropyl alcohol and water according to a weight ratio of 1:1:2, the hydrolysis time is 35min, the hydrolysis temperature is 45 DEG C, and the hydrolysis pH value is 7.5.

[0066] The mass fraction of the barium nitrate aqueous solution in the embodiment is 4%.

[0067] The preparation method of the aging-resistant EPDM rubber product in the embodiment comprises the following steps:

[0068] Step one: the raw materials are weighed according to the weight parts:

[0069] Step two: the raw materials are sequentially added into a banbury mixer for banburying, the banburying temperature is 110 DEG C, and the banburying time is 10min;

[0070] Step three: then vulcanization treatment is performed, the vulcanization temperature is 220 DEG C, the vulcanization time is 10-20min, after the vulcanization treatment is completed, cooling is performed to obtain the aging-resistant EPDM rubber product.

[0071] Embodiment 2.

[0072] The aging-resistant EPDM rubber product in the embodiment comprises the following raw materials by weight:

[0073] The EPDM rubber is 30 parts, the zinc oxide is 8 parts, the accelerator is 5 parts, the stearic acid is 5 parts, the white carbon black is 4 parts, the bentonite effector is 12 parts, and the nano-silicon dioxide and wollastonite agent is 9 parts.

[0074] The accelerator in the embodiment is accelerator DTDM.

[0075] The preparation method of the bentonite improver of the embodiment is as follows:

[0076] S01: the bentonite is first stirred in a sufficient amount of 2% hydrochloric acid solution, then washed with water and dried, and then the dried bentonite is first heated at 320°C for 20 min, then cooled to 145°C at a rate of 5°C / min, and then cooled to room temperature, and the bentonite improver is obtained;

[0077] S02: 5 parts of 6% chitosan solution, 2 parts of yttrium nitrate solution, 2 parts of hydroxyacetic acid, and 0.7 parts of sodium lignosulfonate and 2 parts of modified soybean protein powder are added to 10% sodium citrate solution and stirred to obtain the improver solution;

[0078] S03: the bentonite of S01 and the improver solution are ball milled at a weight ratio of 5:2, the ball milling speed is 1500 r / min, the ball milling time is 2 h, and the ball milling is completed, then washed with water and dried to obtain the bentonite improver.

[0079] The mass fraction of the yttrium nitrate solution of the embodiment is 5%.

[0080] The preparation method of the modified soybean protein powder of the embodiment is as follows: soybean protein powder, 5% lanthanum chloride solution, and oxalic acid are stirred and reacted at a weight ratio of 2:5:1, then washed with water and dried to obtain the modified soybean protein powder.

[0081] The stirring temperature of the stirring and reaction treatment of the embodiment is 52°C, the stirring time is 2 h, and the stirring speed is 700 r / min.

[0082] The preparation method of the nano-silicon dioxide and wollastonite agent of the embodiment is as follows:

[0083] S01: 4 parts of nano-silicon sol, 3 parts of sodium dodecylbenzenesulfonate, 7 parts of wollastonite, 15 parts of silane coupling agent solution, and 2 parts of barium nitrate aqueous solution are stirred and mixed to obtain a wollastonite solution;

[0084] S02: nano-silicon dioxide is added to the wollastonite solution at a weight ratio of 1:5 for ultrasonic dispersion treatment, the ultrasonic power is 450 W, the ultrasonic time is 2 h, and after the ultrasonic treatment, the mixture is washed with water and dried to obtain the nano-silicon dioxide and wollastonite agent.

[0085] The silane coupling agent solution of the embodiment is prepared by hydrolyzing silane coupling agent KH560, isopropyl alcohol, and water at a weight ratio of 1:1:2, the hydrolysis time is 45 min, the hydrolysis temperature is 48°C, and the hydrolysis pH value is 7.5.

[0086] The mass fraction of the barium nitrate aqueous solution of the embodiment is 8%.

[0087] The preparation method of the aging-resistant EPDM product of the embodiment comprises the following steps:

[0088] Step one, the raw materials are weighed according to the weight parts:

[0089] Step two, the raw materials are sequentially added to the internal mixer for internal mixing, the internal mixing temperature is 120 DEG C, and the internal mixing time is 15 min;

[0090] Step three, then the vulcanization treatment is performed, the vulcanization temperature is 220 DEG C, the vulcanization time is 20 min, after the vulcanization is completed, cooling is performed, and thus the aging-resistant EPDM product of the embodiment is obtained.

[0091] Embodiment 3.

[0092] The aging-resistant EPDM product of the embodiment comprises the following raw materials by weight:

[0093] The EPDM is 27.5 parts, the zinc oxide is 6.5 parts, the accelerator is 4 parts, the stearic acid is 4 parts, the white carbon black is 3 parts, the bentonite improver is 10 parts, and the nano-silicon dioxide and wollastonite agent is 7 parts.

[0094] The accelerator of the embodiment is the accelerator M.

[0095] The preparation method of the bentonite improver of the embodiment is as follows:

[0096] S01: the bentonite is first stirred in a sufficient amount of 2% hydrochloric acid solution, then washed with water and dried, the dried bentonite is first heated at 315 DEG C for 15 min, then cooled to 140 DEG C at a rate of 3.5 DEG C / min, kept warm, and then air-cooled to room temperature;

[0097] S02: 4 parts of 5% chitosan solution, 1.5 parts of yttrium nitrate solution, 1.5 parts of hydroxyacetic acid, 0.6 parts of lignin sulfonate sodium, and 1.5 parts of modified soybean protein powder are added to 10% sodium citrate solution, stirred and mixed, and then the stirring is fully performed to obtain the improver liquid;

[0098] S03: the bentonite of S01 and the improver liquid are ball milled at a weight ratio of 5:2, the ball milling speed is 1250 r / min, the ball milling time is 1.5 h, after the ball milling is completed, the mixture is washed with water and dried to obtain the bentonite improver.

[0099] The mass fraction of the yttrium nitrate solution of the embodiment is 3.5%.

[0100] The preparation method of the modified soybean protein powder of the embodiment is as follows: the soybean protein powder, 5% lanthanum chloride solution, and oxalic acid are stirred and reacted at a weight ratio of 2:5:1, after the stirring is completed, the mixture is washed with water and dried to obtain the modified soybean protein powder.

[0101] The stirring temperature of the stirring reaction process of the embodiment is 50°C, the stirring time is 1.5h, and the stirring speed is 600r / min.

[0102] The preparation method of the nano-silicon dioxide and wollastonite agent of the embodiment is as follows:

[0103] S01: 3 parts of nano-silicon sol, 2 parts of sodium dodecyl benzene sulfonate, 5.5 parts of wollastonite, 12.5 parts of silane coupling agent liquid, and 1.5 parts of barium nitrate aqueous solution are stirred and uniformly mixed to obtain a wollastonite liquid;

[0104] S02: nano-silicon dioxide is added to the wollastonite liquid in a weight ratio of 1:5 for ultrasonic dispersion treatment, the ultrasonic power is 400W, the ultrasonic time is 1.5h, after the ultrasonic treatment is completed, water washing and drying are performed to obtain a nano-silicon dioxide and wollastonite agent.

[0105] The silane coupling agent liquid of the embodiment is a silane coupling agent KH560, isopropyl alcohol and water which are hydrolyzed in a weight ratio of 1:1:2, the hydrolysis time is 40min, the hydrolysis temperature is 46°C, and the hydrolysis pH value is 7.5.

[0106] The mass fraction of the barium nitrate aqueous solution of the embodiment is 6.5%.

[0107] The preparation method of the aging-resistant EPDM rubber product of the embodiment includes the following steps:

[0108] Step one, the raw materials are weighed according to the weight parts:

[0109] Step two, the raw materials are sequentially added to a banbury mixer for banburying, the banburying temperature is 115°C, and the banburying time is 12.5min;

[0110] Step three, then vulcanization treatment is performed, the vulcanization temperature is 220°C, the vulcanization time is 15min, after the vulcanization is completed, cooling is performed to obtain the aging-resistant EPDM rubber product of the embodiment.

[0111] Comparative Example 1.

[0112] The difference between Comparative Example 1 and Example 3 is that bentonite improver is not added.

[0113] Comparative Example 2.

[0114] The difference between Comparative Example 2 and Example 3 is that the S01 treatment is not used in the preparation of the bentonite improver.

[0115] Comparative Example 3.

[0116] The difference between Comparative Example 3 and Example 3 is that the improver liquid treatment is not used in the preparation of the bentonite improver.

[0117] Comparative Example 4.

[0118] The difference from Example 3 is that the preparation method in the preparation of the effluent liquid is different;

[0119] 4 parts of a chitosan solution with a mass fraction of 5% is added to a sodium citrate solution with a mass fraction of 10%, stirred and mixed, then 1.5 parts of glycolic acid and 0.6 parts of sodium lignosulfonate are added, and stirred sufficiently to obtain the effluent liquid.

[0120] Comparative Example 5.

[0121] The difference from Example 3 is that the preparation method in the preparation of the effluent liquid is different;

[0122] 4 parts of a chitosan solution with a mass fraction of 5% and 1.5 parts of yttrium nitrate solution are added to a sodium citrate solution with a mass fraction of 10%, stirred and mixed, then 1.5 parts of glycolic acid is added, and stirred sufficiently to obtain the effluent liquid.

[0123] Comparative Example 6.

[0124] The difference from Example 3 is that the nano-silicon dioxide and wollastonite agent is not added.

[0125] Comparative Example 7.

[0126] The difference from Example 3 is that the nano-silicon dioxide and wollastonite agent is not added.

[0127] Comparative Example 8.

[0128] The difference from Example 3 is that the silicon dioxide and wollastonite agent is not added.

[0129] The performance measurement results of Examples 1-3 and Comparative Examples 1-8 are as follows

[0130]

[0131] From Examples 1-3 and Comparative Examples 1-8, it can be seen that the product of Example 3 has excellent elastic performance and wear resistance, and the performance of the prepared product can be significantly improved in coordination of elastic performance and wear resistance, and the aging resistance stability effect of the product is remarkable.

[0132] Without adding bentonite effluent agent and nano-silicon dioxide and wollastonite agent, the performance of the product is obviously deteriorated, and the performance of the product is significantly improved by the coordination of the two.

[0133] The performance effect of the product has a deteriorating trend, only the bentonite efficiency agent and the nano-silica mixed with the wollastonite agent prepared by the method of the present application have the most significant performance effect, and the effects of other methods are not as obvious as the present application.

[0134] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present examples are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the specification as such. All changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

[0135] Furthermore, it should be understood that although the description is made on the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and a person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that can be understood by a person skilled in the art.

Claims

1. An aged resistant ethylene propylene diene rubber article, characterized by, The following raw materials are included by weight parts: EPDM 25-30 parts, zinc oxide 5-8 parts, accelerator 3-5 parts, stearic acid 3-5 parts, white carbon black 2-4 parts, bentonite effector 8-12 parts, nano-silica and wollastonite agent 5-9 parts; The preparation method of the bentonite effector is: S01: The bentonite is first stirred uniformly in a sufficient amount of 2% hydrochloric acid solution, then washed with water and dried, and then the dried bentonite is first heated at 310-320℃ for 10-20min, then cooled to 135-145℃ at a rate of 2-5℃ / min, and then kept warm, and then air-cooled to room temperature; S02: 3-5 parts of 4-6% chitosan solution, 1-2 parts of yttrium nitrate solution, 1-2 parts of hydroxyacetic acid, and 0.5-0.7 parts of sodium lignosulfonate, and 1-2 parts of modified soybean protein powder are added to 10% sodium citrate solution and stirred uniformly, then the effector liquid is obtained; S03: The bentonite of S01 and the effector liquid are ball milled at a weight ratio of 5:2, the ball milling speed is 1000-1500r / min, and the ball milling time is 1-2h, then the ball milling is finished, and the product is washed with water and dried to obtain the bentonite effector; The preparation method of the nano-silica and wollastonite agent is: S01: 2-4 parts of nano-silica sol, 1-3 parts of sodium dodecyl benzene sulfonate, 4-7 parts of wollastonite, 10-15 parts of silane coupling agent liquid, and 1-2 parts of barium nitrate aqueous solution are stirred uniformly to obtain a wollastonite liquid; S02: The nano-silica is added to the wollastonite liquid at a weight ratio of 1:5 for ultrasonic dispersion treatment, the ultrasonic power is 350-450W, and the ultrasonic time is 1-2h, then the ultrasonic treatment is finished, and the product is washed with water and dried to obtain the nano-silica and wollastonite agent.

2. The age resistant EPDM article of claim 1, wherein, The following raw materials are included by weight parts: EPDM 27.5 parts, zinc oxide 6.5 parts, accelerator 4 parts, stearic acid 4 parts, white carbon black 3 parts, bentonite effector 10 parts, and nano-silica and wollastonite agent 7 parts.

3. The age resistant EPDM article of claim 1, wherein, The accelerator is one or more combinations of accelerator TMTD, accelerator DTDM, and accelerator M.

4. The age resistant EPDM article of claim 1, wherein, The mass fraction of the yttrium nitrate solution is 2-5%.

5. The age resistant EPDM article of claim 1 wherein, The preparation method of the modified soybean protein powder is: soybean protein powder, 5% lanthanum chloride solution, and oxalic acid are stirred and reacted at a weight ratio of 2:5:1, then the stirring and reaction are finished, and the product is washed with water and dried to obtain the modified soybean protein powder.

6. The age resistant EPDM article of claim 5, wherein, The stirring and reaction treatment is carried out at a stirring temperature of 48-52℃, a stirring time of 1-2h, and a stirring speed of 500-700r / min.

7. The age resistant EPDM article of claim 5, wherein, The silane coupling agent liquid is prepared by hydrolyzing silane coupling agent KH560, isopropyl alcohol, and water at a weight ratio of 1:1:2 for 35-45min at a temperature of 45-48℃ and a pH value of 7.5; the mass fraction of the barium nitrate aqueous solution is 4-8%.

8. A process for the production of an aged resistant EPDM article according to any one of claims 1 to 7, characterized in that, The following steps are included: Step one: the raw materials are weighed according to the weight parts: Step two: the raw materials are added to a banbury mixer in sequence and banburyed, the banburying temperature is 110-120℃, and the banburying time is 10-15min; Step three, then again to carry out the vulcanization treatment, vulcanization temperature is 220 ℃, vulcanization 10-20 min, vulcanization end, cooling, get aging-resistant EPDM rubber products.

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