A low friction coefficient and high wear resistance EPDM material and its preparation method

Abstract

The present invention provides a low-friction, highly wear-resistant EPDM material and a preparation method thereof. The EPDM material is made from the following raw materials in parts by weight: 100 parts EPDM, 80-150 parts HDPE, 10-30 parts PTFE / MoS2 composite material, 2-6 parts zinc oxide, 1-3 parts stearic acid, 60-100 parts reinforcing carbon black, 1-5 parts antioxidant, 1-3 parts calcium oxide, 1-4 parts coupling agent, 0.5-2 parts vulcanizing agent, 4-8 parts vulcanization accelerator, and 0.1-0.5 parts retarder. The EPDM material of the present invention uses EPDM as a matrix and, when combined with auxiliary materials such as HDPE and PTFE / MoS2 composite material, the resulting EPDM material has the advantages of low friction resistance, excellent wear resistance, and excellent mechanical properties.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber materials, and in particular to an EPDM material with a low friction coefficient and high wear resistance and a preparation method thereof. Background Art

[0002] The automotive glass run channel sealing strip seals and guides the window glass. Since the window glass directly rubs against the glass run channel sealing strip when it rises and falls, the glass run channel sealing strip is required to have good wear resistance and low friction resistance.

[0003] Automotive glass run channel sealing strips are composed of a base material and a friction layer. Base materials include EPDM, thermoplastic elastomers, and polyvinyl chloride. EPDM offers excellent overall performance, including good aging resistance, UV resistance, high and low temperature resistance, outstanding acid and alkali resistance, strong environmental adaptability, and excellent elasticity and resistance to permanent deformation. Currently, it is the most commonly used base material for rubber automotive glass run channel sealing strips. The friction layer is typically constructed using three processes: flocking, spray coating, and polyethylene (PE) strip lamination to reduce friction and improve wear resistance.

[0004] Flocking the lip of the sealing strip that contacts the glass can, to a certain extent, ensure that there is no abnormal noise when the glass is raised or lowered. However, the flocking fibers are easily shed due to the frequent friction caused by the glass being raised or lowered, which affects the cleanliness and appearance of the glass and its noise reduction effect. The spraying process refers to spraying the friction surface of the glass guide groove sealing strip after plasma treatment. The coating is generally polyurethane. The disadvantage is that it requires two steps and is relatively cumbersome. Extrusion compounding is to melt thermoplastic materials such as polyethylene in the extruder and squeeze them into a flat die. After the sheet film flows out, it is immediately compounded with another or two films through cooling rollers and compounding rollers. Although the processing cost is low, the loss is large when heating and changing the resin, and the extrusion flatness is also poor, making quality control more difficult.

[0005] At present, in order to further improve the wear resistance of the glass run channel sealing strip surface, the use of low friction coefficient and high wear resistance EPDM material co-extruded with ordinary EPDM material to replace the spraying process on the EPDM run channel surface has become a new technological innovation trend. Summary of the Invention

[0006] Based on the technical problems existing in the background technology, the present invention proposes an EPDM material with low friction coefficient and high wear resistance and a preparation method thereof. By using EPDM as the matrix and combining it with auxiliary materials such as HDPE and PTFE / MoS2 composite materials, the obtained EPDM material has the advantages of low friction resistance, excellent wear resistance and mechanical properties.

[0007] The present invention proposes an EPDM material with a low friction coefficient and high wear resistance, which is made of the following raw materials in parts by mass: 100 parts of EPDM, 80-150 parts of HDPE, 10-30 parts of PTFE / MoS2 composite material, 2-6 parts of zinc oxide, 1-3 parts of stearic acid, 60-100 parts of reinforcing carbon black, 1-5 parts of antioxidant, 1-3 parts of calcium oxide, 1-4 parts of coupling agent, 0.5-2 parts of vulcanizing agent, 4-8 parts of vulcanization accelerator and 0.1-0.5 parts of scorch retarder.

[0008] In the present invention, EPDM and HDPE are used as matrices, which have the advantages of excellent weather resistance and good compression permanent deformation performance. In the PTFE / MoS2 composite material added thereto, the PTFE has an extremely low friction coefficient, which can greatly improve the lubrication performance of the rubber. MoS2 can reduce friction at low temperatures and also improve the gloss, wear resistance, anti-fouling and tensile properties of the rubber. Therefore, after the composite material formed by PTFE and MoS2 is added, the EPDM material can have a low friction coefficient, high wear resistance and excellent mechanical properties.

[0009] Preferably, the EPDM has an ethylene content of 40-80% and a Mooney viscosity [ML 100°C (1+4)] of 50 or more.

[0010] Preferably, the density of the HDPE is 0.940-0.976 g / cm 3 The melt index is 1-20 g / min, and the melt index is the melt index measured using GB / T 3682-2000 standard method G conditions.

[0011] Preferably, the PTFE / MoS2 composite material is obtained by adhering polydopamine to the surface of PTFE powder and then subjecting it to a hydrothermal reaction with thiourea and a molybdenum source;

[0012] Preferably, the mass ratio of the PTFE powder, thiourea and molybdenum source is 1:0.8-1.5:0.5-1;

[0013] Preferably, the molybdenum source is at least one of sodium molybdate or ammonium molybdate.

[0014] In the present invention, after polydopamine (PDA) is adhered to PTFE powder, since PDA itself has high adhesion, modifiable groups and active sites, especially the catechol groups on it can react with the amino groups on thiourea through Michael addition and Schiff base reaction, so that thiourea is attached to the surface of PTFE powder. Thereafter, the thiourea attached to the surface of PTFE powder acts as a sulfur source and then chemically reacts with a molybdenum source. The generated MoS2 nanosheets grow uniformly on the surface of PTFE powder, forming the PTFE / MoS2 composite material.

[0015] This PTFE / MoS2 composite material, when used in an EPDM matrix, leverages the load-bearing and wear-resistant properties of PTFE and the interlayer sliding properties (friction-reducing and lubricating properties) of MoS2. Compared to simple PTFE and MoS2, this composite material imparts superior friction-reducing and wear-resistant properties to the EPDM material, achieving a synergistic enhancement of the EPDM material's tribological properties. Furthermore, because MoS2 is an inorganic material and PTFE is an organic material, the MoS2 supported on the PTFE surface can be effectively dispersed within the EPDM material. Furthermore, the growth of MoS2 on the PTFE surface mitigates the agglomeration of MoS2 alone in the rubber matrix due to its high surface energy, thereby significantly enhancing the EPDM material's tribological properties.

[0016] Preferably, the reinforcing carbon black is at least one of carbon black N550, carbon black N220, carbon black N330 or carbon black N774.

[0017] In the present invention, the reinforcing carbon black can improve the mechanical properties and the ability to resist wear and tear of the EPDM material, and can be combined with other additives to improve the mechanical properties of the rubber, such as heat resistance and hardness.

[0018] Preferably, the vulcanizing agent is at least one of sulfur, DCP, BIBP or DBPMH, and the vulcanization accelerator is at least one of accelerator TT, accelerator M, accelerator DM, accelerator BZ, accelerator CZ or accelerator TRA.

[0019] Preferably, the antioxidant is at least one of antioxidant MB, antioxidant RD, antioxidant 445, antioxidant 6PPD or antioxidant 4010NA.

[0020] In the present invention, the antioxidant can enhance the aging resistance of the rubber, effectively slow down the aging speed and degree, and extend the service life of the rubber material.

[0021] Preferably, the coupling agent is at least one of a silane coupling agent or a titanate coupling agent, preferably at least one of silane coupling agent A151, silane coupling agent A172, silane coupling agent Si-69 or silane coupling agent KH-580.

[0022] In the present invention, the coupling agent can chemically react with the surface of the reinforcing carbon black, thereby improving the compatibility of the reinforcing carbon black in EPDM and enhancing its dispersion performance, thereby enabling the reinforcing carbon black to fully exert its reinforcing performance.

[0023] The present invention also proposes a method for preparing the above-mentioned EPDM material with low friction coefficient and high wear resistance, comprising: adding EPDM, HDPE, PTFE / MoS2 composite material, zinc oxide, stearic acid, reinforcing carbon black, antioxidant, calcium oxide and coupling agent into an internal mixer for mixing, and removing the glue when the temperature is raised to 160-170°C; adding the obtained rubber into the internal mixer again, adding a vulcanizer, a vulcanization accelerator and a scorch retarder for mixing, removing the glue when the temperature is raised to 80-100°C, extruding and vulcanizing and molding, thereby obtaining the EPDM material with low friction coefficient and high wear resistance.

[0024] Preferably, the vulcanization molding temperature is 200-230°C.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention adopts PTFE / MoS2 composite material to make EPDM material have low friction and wear resistance. At the same time, HDPE and EPDM with high ethylene content are used to increase the hardness and fluidity of EPDM material, improve wear resistance and increase the fluidity of extrusion during rubber compound processing.

[0027] (2) The present invention uses a PTFE / MoS2 composite material, which not only improves the long-lasting wear resistance of the EPDM material, but also has little effect on its own mechanical properties, thereby ensuring the higher mechanical properties of the EPDM material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a SEM image of the EPDM material with low friction coefficient and high wear resistance described in Example 1 of the present invention. DETAILED DESCRIPTION

[0029] Hereinafter, the technical solutions of the present invention will be described in detail through specific embodiments. However, it should be clearly stated that these embodiments are provided for illustration only and are not to be construed as limiting the scope of the present invention.

[0030] EPDM was purchased from LANXESS, Germany, model EPDM 8550C;

[0031] HDPE was purchased from Qilu Petrochemical Company, model DGDA6098;

[0032] PTFE powder was purchased from DuPont, USA, model MP1200; MoS2 was purchased from Suzhou Kaifa New Material Technology Co., Ltd., with a thickness of 10-15 nm and a diameter of 300-400 nm;

[0033] Zinc oxide was purchased from Jining Bora Carbon Materials Co., Ltd.; stearic acid was purchased from Donghai Chemical Raw Materials Co., Ltd.;

[0034] Reinforcing carbon black was purchased from Shanghai Cabot Corporation; antioxidant was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.; calcium oxide was purchased from Kettlitz, Germany; silane coupling agent was purchased from Shanghai Kaiyin Chemical Co., Ltd.;

[0035] The vulcanizing agent was purchased from Ningbo Suhua Polymer Co., Ltd.; the vulcanization accelerator was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.; and the scorch retarder was purchased from Shandong Yanggu Huatai Chemical Co., Ltd.

[0036] Example 1

[0037] A low-friction-coefficient and highly wear-resistant EPDM material is prepared from the following raw materials in parts by mass: 100 parts of EPDM, 120 parts of HDPE, 20 parts of PTFE / MoS2 composite material, 4 parts of zinc oxide, 2 parts of stearic acid, 80 parts of carbon black N550, 3 parts of antioxidant 4010NA, 2 parts of calcium oxide, 2 parts of silane coupling agent A151, 1 part of sulfur, 1.5 parts of accelerator TT (tetramethylthiuram disulfide), 1.5 parts of accelerator CZ (N-cyclohexyl-2-benzothiazolesulfenamide), 2 parts of accelerator M (2-mercaptobenzothiazole), and 0.3 parts of scorch retarder CTP;

[0038] The PTFE / MoS2 composite material is prepared by the following method: dopamine hydrochloride is added to tris(hydroxymethylaminomethane) buffer solution and stirred to dissolve to obtain a dopamine solution with a concentration of 0.05 mol / L (pH=8.5), and then ammonium persulfate and ethylenediamine in equal molar amounts to the dopamine hydrochloride are added. After stirring and dissolving completely, PTFE powder of equal mass to the dopamine hydrochloride is added, and the mixture is stirred and reacted for 6 hours, filtered, washed with water, and dried to obtain PTFE powder with polydopamine adhered thereto; the PTFE powder with polydopamine adhered thereto is added to deionized water and ultrasonically dispersed uniformly, and thiourea and sodium molybdate are added under stirring, the mass ratio of the PTFE powder, thiourea and sodium molybdate being 1:1.2:0.8, and the mixture is stirred and reacted for 4 hours, and then placed in a reactor, and reacted at 200°C for another 36 hours, filtered, washed with water, and dried to obtain the PTFE / MoS2 composite material.

[0039] The preparation method of the above-mentioned EPDM material with low friction coefficient and high wear resistance comprises: adding EPDM, HDPE, PTFE / MoS2 composite material, zinc oxide, stearic acid, antioxidant 4010NA and calcium oxide into an internal mixer according to the above-mentioned mass parts, mixing at a speed of 35 rpm for 50 seconds, then adding carbon black N550 and silane coupling agent A151 and continuing to mix for 60 seconds, and raising and lowering the top bolt once when the temperature reaches 100°C, 120°C and 140°C respectively. The rubber material is turned over and discharged after the temperature reaches 160° C. to obtain a first-stage mixed rubber; after the first-stage mixed rubber is left for at least 8 hours, sulfur, accelerator TT, accelerator CZ, accelerator M and scorch retarder CTP are added, and the mixture is mixed to 90° C. and discharged to obtain a second-stage mixed rubber; the second-stage mixed rubber is fed into a 60-type rubber extruder, extruded into a mold together with an EPDM-based sealing strip, and then vulcanized and formed by microwave at 220° C. to obtain the EPDM material with a low friction coefficient and high wear resistance.

[0040] Example 2

[0041] A low-friction-coefficient and highly wear-resistant EPDM material is prepared from the following raw materials in parts by mass: 100 parts of EPDM, 80 parts of HDPE, 30 parts of PTFE / MoS2 composite material, 2 parts of zinc oxide, 3 parts of stearic acid, 60 parts of carbon black N330, 5 parts of antioxidant RD, 1 part of calcium oxide, 1 part of silane coupling agent A172, 0.5 parts of sulfur, 1 part of accelerator TT, 2 parts of accelerator CZ, 3 parts of accelerator M, 2 parts of accelerator BZ (zinc dibutyldithiocarbamate), and 0.1 part of scorch retarder CTP;

[0042] The PTFE / MoS2 composite material is prepared by the method described in Example 1.

[0043] The preparation method of the above-mentioned EPDM material with low friction coefficient and high wear resistance comprises: adding EPDM, HDPE, PTFE / MoS2 composite material, zinc oxide, stearic acid, antioxidant RD and calcium oxide into an internal mixer according to the above-mentioned mass parts, mixing for 50 seconds at a speed of 35 rpm, then adding carbon black N330 and silane coupling agent A172 and continuing to mix for 60 seconds, and raising and lowering the top bolt once when the temperature reaches 100°C, 120°C and 140°C respectively to turn the rubber compound over. , after the temperature reaches 170°C, the rubber mixture is discharged to obtain a first-stage rubber mix; after the first-stage rubber mix is ​​left for at least 8 hours, sulfur, accelerator TT, accelerator CZ, accelerator M, accelerator BZ and scorch retarder CTP are added, and the mixture is mixed to 80°C and then discharged to obtain a second-stage rubber mix; the second-stage rubber mix is ​​fed into a 60-type rubber extruder, extruded into a mold together with an EPDM-based sealing strip, and then microwave-vulcanized at 230°C to obtain the EPDM material with a low friction coefficient and high wear resistance.

[0044] Example 3

[0045] A low-friction-coefficient and highly wear-resistant EPDM material is prepared from the following raw materials in parts by mass: 100 parts of EPDM, 150 parts of HDPE, 10 parts of PTFE / MoS2 composite material, 6 parts of zinc oxide, 1 part of stearic acid, 100 parts of carbon black N550, 1 part of antioxidant 4010NA, 3 parts of calcium oxide, 4 parts of silane coupling agent A151, 2 parts of sulfur, 1.5 parts of accelerator TT (tetramethylthiuram disulfide), 1.5 parts of accelerator CZ (N-cyclohexyl-2-benzothiazolesulfenamide), 1 part of accelerator M (2-mercaptobenzothiazole), and 0.5 parts of scorch retarder CTP;

[0046] The PTFE / MoS2 composite material is prepared by the method described in Example 1.

[0047] The preparation method of the above-mentioned EPDM material with low friction coefficient and high wear resistance comprises: adding EPDM, HDPE, PTFE / MoS2 composite material, zinc oxide, stearic acid, antioxidant 4010NA and calcium oxide into an internal mixer according to the above-mentioned mass parts, mixing for 50 seconds at a speed of 35 rpm, then adding carbon black N550 and silane coupling agent A151 and continuing to mix for 60 seconds, and raising and lowering the top bolt once when the temperature reaches 100°C, 120°C and 140°C respectively. The rubber material is turned over and discharged after the temperature reaches 160° C. to obtain a first-stage mixed rubber; after the first-stage mixed rubber is left for at least 8 hours, sulfur, accelerator TT, accelerator CZ, accelerator M and scorch retarder CTP are added, and the mixture is mixed to 100° C. and discharged to obtain a second-stage mixed rubber; the second-stage mixed rubber is fed into a 60-type rubber extruder, extruded into a mold together with an EPDM-based sealing strip, and then vulcanized and formed by microwave at 200° C. to obtain the EPDM material with a low friction coefficient and high wear resistance.

[0048] Comparative Example 1

[0049] An EPDM material is made of the following raw materials in parts by mass: 100 parts of EPDM, 120 parts of HDPE, 12 parts of PTFE powder, 8 parts of MoS2, 4 parts of zinc oxide, 2 parts of stearic acid, 80 parts of carbon black N550, 3 parts of antioxidant 4010NA, 2 parts of calcium oxide, 2 parts of silane coupling agent A151, 1 part of sulfur, 1.5 parts of accelerator TT (tetramethylthiuram disulfide), 1.5 parts of accelerator CZ (N-cyclohexyl-2-benzothiazolesulfenamide), 2 parts of accelerator M (2-mercaptobenzothiazole), and 0.3 parts of scorch retarder CTP.

[0050] The preparation method of the above-mentioned EPDM material with low friction coefficient and high wear resistance comprises: adding EPDM, HDPE, PTFE powder, MoS2, zinc oxide, stearic acid, antioxidant 4010NA and calcium oxide into an internal mixer according to the above-mentioned mass parts, mixing for 50 seconds at a speed of 35 rpm, then adding carbon black N550 and silane coupling agent A151 and continuing to mix for 60 seconds, and raising and lowering the top bolt once when the temperature reaches 100°C, 120°C and 140°C respectively to make the glue The material is turned over, and the glue is discharged after the temperature reaches 160°C to obtain a first-stage mixed rubber; after the first-stage mixed rubber is left for at least 8 hours, sulfur, accelerator TT, accelerator CZ, accelerator M and scorch retarder CTP are added, and the mixture is mixed to 90°C and then discharged to obtain a second-stage mixed rubber; the second-stage mixed rubber is fed into a 60-type rubber extruder, extruded into a mold together with an EPDM-based sealing strip, and then microwave-vulcanized at 220°C to obtain the EPDM material with a low friction coefficient and high wear resistance.

[0051] Comparative Example 2

[0052] An EPDM material is made from the following raw materials in parts by mass: 100 parts of EPDM, 120 parts of HDPE, 20 parts of PTFE / MoS2 composite material, 4 parts of zinc oxide, 2 parts of stearic acid, 80 parts of carbon black N550, 3 parts of antioxidant 4010NA, 2 parts of calcium oxide, 2 parts of silane coupling agent A151, 1 part of sulfur, 1.5 parts of accelerator TT (tetramethylthiuram disulfide), 1.5 parts of accelerator CZ (N-cyclohexyl-2-benzothiazolesulfenamide), 2 parts of accelerator M (2-mercaptobenzothiazole), and 0.3 parts of scorch retarder CTP;

[0053] The PTFE / MoS2 composite material is prepared by the following method: dopamine hydrochloride is added to tris(hydroxymethylaminomethane) buffer solution and stirred to dissolve to obtain a dopamine solution with a concentration of 0.05 mol / L (pH=8.5), and then ammonium persulfate and ethylenediamine are added in equal molar amounts to the dopamine hydrochloride. After stirring and dissolving completely, PTFE powder of equal mass to the dopamine hydrochloride is added, and the mixture is stirred and reacted for 6 hours, filtered, washed with water, and dried to obtain PTFE powder adhered to polydopamine; the PTFE powder adhered to polydopamine is added to deionized water and ultrasonically dispersed evenly, and MoS2 is added under stirring, the mass ratio of the PTFE powder to MoS2 is 1:0.65, and the mixture is stirred and reacted for 4 hours, filtered, washed with water, and dried to obtain the PTFE / MoS2 composite material.

[0054] The preparation method of the above-mentioned EPDM material with low friction coefficient and high wear resistance comprises: adding EPDM, HDPE, PTFE / MoS2 composite material, zinc oxide, stearic acid, antioxidant 4010NA and calcium oxide into an internal mixer according to the above-mentioned mass parts, mixing at a speed of 35 rpm for 50 seconds, then adding carbon black N550 and silane coupling agent A151 and continuing to mix for 60 seconds, and raising and lowering the top bolt once when the temperature reaches 100°C, 120°C and 140°C respectively. The rubber material is turned over and discharged after the temperature reaches 160° C. to obtain a first-stage mixed rubber; after the first-stage mixed rubber is left for at least 8 hours, sulfur, accelerator TT, accelerator CZ, accelerator M and scorch retarder CTP are added, and the mixture is mixed to 90° C. and discharged to obtain a second-stage mixed rubber; the second-stage mixed rubber is fed into a 60-type rubber extruder, extruded into a mold together with an EPDM-based sealing strip, and then vulcanized and formed by microwave at 220° C. to obtain the EPDM material with a low friction coefficient and high wear resistance.

[0055] Performance testing:

[0056] The EPDM materials described in the above examples and comparative examples were subjected to the performance tests shown in Table 1. The test results are shown in Table 2.

[0057]

[0058] In the abrasion grade (dry grinding), 3 specimens are subjected to wear test after 16 hours in an environment with standard temperature and humidity requirements, with a load of 2kg. Abrasion resistance of 30,000 times without leakage is considered to be ≥ Grade 4. In the abrasion grade (wet grinding), 3 specimens are subjected to wear test after 16 hours in a standard temperature and humidity environment, and then immersed in clean water at (23 ± 2) °C for 1 hour and taken out. Abrasion test is carried out in a wet state and kept wet. 2 mL of clean water is added to the specimen for every 2,000 frictions, with a load of 2kg. Abrasion resistance of 25,000 times without leakage is considered to be ≥ Grade 4.

[0059] It can be seen from Table 2 that the EPDM material prepared in the embodiment has excellent comprehensive performance. After testing, its tensile strength is greater than 15 MPa, the elongation at break is greater than 150%, the change rate after 100°C × 168h hot air aging is small, and it has more excellent low friction coefficient and high wear resistance.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A low friction coefficient and high wear resistance EPDM material, characterized in that: The invention is made of the following raw materials in parts by mass: 100 parts of EPDM, 80-150 parts of HDPE, 10-30 parts of PTFE / MoS2 composite material, 2-6 parts of zinc oxide, 1-3 parts of stearic acid, 60-100 parts of reinforcing carbon black, 1-5 parts of antioxidant, 1-3 parts of calcium oxide, 1-4 parts of coupling agent, 0.5-2 parts of vulcanizing agent, 4-8 parts of vulcanization accelerator and 0.1-0.5 parts of scorch retarder; The PTFE / MoS2 composite material is obtained by adhering polydopamine to the surface of PTFE powder and then performing a hydrothermal reaction with thiourea and a molybdenum source; The mass ratio of the PTFE powder, thiourea and molybdenum source is 1:0.8-1.5:0.5-1.

2. The EPDM material with low friction coefficient and high wear resistance according to claim 1, characterized in that: The EPDM has an ethylene content of 40-80%, and a Mooney viscosity of 50 or more under ML1+4 and 100° C. test conditions.

3. The EPDM material with low friction coefficient and high wear resistance according to claim 1, characterized in that: The density of the HDPE is 0.940-0.976 g / cm 3 The melt index is 1-20 g / min, and the melt index is the melt index measured using GB / T 3682-2000 standard method G conditions.

4. The EPDM material with low friction coefficient and high wear resistance according to any one of claims 1 to 3, characterized in that: The reinforcing carbon black is at least one of carbon black N550, carbon black N220, carbon black N330 or carbon black N774.

5. The EPDM material with low friction coefficient and high wear resistance according to any one of claims 1 to 3, characterized in that: The vulcanizing agent is at least one of sulfur, DCP, BIBP or DBPMH, and the vulcanization accelerator is at least one of accelerator TT, accelerator M, accelerator DM, accelerator BZ, accelerator CZ or accelerator TRA.

6. The EPDM material with low friction coefficient and high wear resistance according to any one of claims 1 to 3, characterized in that: The antioxidant is at least one of antioxidant MB, antioxidant RD, antioxidant 445, antioxidant 6PPD or antioxidant 4010NA.

7. The EPDM material with low friction coefficient and high wear resistance according to any one of claims 1 to 3, characterized in that: The coupling agent is at least one of silane coupling agent A151, silane coupling agent A172, silane coupling agent Si-69 or silane coupling agent KH-580.

8. A method for preparing the EPDM material with low friction coefficient and high wear resistance according to any one of claims 1 to 7, characterized in that: include: EPDM, HDPE, PTFE / MoS2 composite material, zinc oxide, stearic acid, reinforcing carbon black, antioxidant, calcium oxide and coupling agent are added to an internal mixer for mixing, and the binder is discharged when the temperature is raised to 160-170°C; the obtained rubber material is added to the internal mixer again, and a vulcanizing agent, a vulcanization accelerator and a scorch retarder are added for mixing, and the binder is discharged when the temperature is raised to 80-100°C. After extrusion, it is vulcanized and formed to obtain the EPDM material with low friction coefficient and high wear resistance.

9. The method for preparing the EPDM material with low friction coefficient and high wear resistance according to claim 8, characterized in that: The vulcanization molding temperature is 200-230°C.

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