A high wear-resistant tire tread composite material, its preparation method and application

Abstract

A high wear-resistant tire tread composite material, its preparation method and application. The present invention belongs to the field of rubber materials and their preparation. The purpose of the present invention is to solve the technical problems that the wear resistance of existing rubber composite materials cannot be significantly improved, and the improvement of wear resistance leads to a significant decline in wet skid resistance. The material of the present invention is prepared from olefin rubber, reinforcing filler, plasticizer, zinc oxide, stearic acid, sulfur, silane coupling agent, accelerator and antioxidant. The olefin rubber is composed of natural rubber, solution-polymerized styrene-butadiene rubber, cis-butadiene rubber and iron-based butadiene-pentene rubber. The molecular weight of the iron-based butadiene-pentene rubber is 300,000 to 600,000, and the sum of the vinyl and propenyl side group contents is 50% to 70%. During the preparation process, the molar ratio of monomer butadiene to isoprene is (1 to 4):1. The present invention significantly improves the wear resistance while ensuring the wet skid resistance.

Description

Technical Field

[0001] The present invention belongs to the field of rubber materials and their preparation, and particularly relates to a high wear-resistant tire tread composite material, a preparation method thereof, and an application thereof. Background Art

[0002] The friction and wear behavior of tire treads is a complex process, and the wear resistance of rubber products is an extremely important index affecting their service life. Typically, the wear particles of tires are generated by friction and wear when the tires come into contact with the ground. Wear particles small enough will be released into the soil, atmosphere, and rivers after detaching from the contact surface between the tread and the road surface, causing secondary hazards. During vehicle driving, the wear debris generated by wear includes vulcanized rubber particles, filler particles, and zinc oxide particles, etc. The size of the worn vulcanized rubber particles is in the micron scale, and the size of the filler particles that are not well combined with the rubber and are worn off is in the nanoscale, which is more likely to be suspended in the atmosphere and cause harm to the environment.

[0003] Improving the wear resistance of rubber materials can effectively extend the service life of products and reduce their replacement frequency, which is beneficial to saving resources and protecting the environment. Given the inherent characteristics of rubber composites themselves, it is impossible to completely avoid wear. What we need to solve is to improve the wear resistance of tires as much as possible to reduce the wear amount of tire tread rubber. It is estimated that if the wear resistance of tires is increased by 10%, 64,000 tons of crude oil can be saved annually. Therefore, improving the wear resistance of tires is of great significance. Summary of the Invention

[0004] The purpose of the present invention is to provide a high wear-resistant tire tread composite material, a preparation method thereof, and an application thereof to solve the technical problems that the wear resistance of existing rubber composites cannot be significantly improved and the improvement of wear resistance leads to a significant decrease in wet skid resistance.

[0005] A high wear-resistant tire tread composite material of the present invention is prepared from the following components by weight:

[0006] 100 parts of olefin rubber;

[0007] 10 - 100 parts of reinforcing filler;

[0008] 10 - 50 parts of plasticizer;

[0009] 1 - 5 parts of zinc oxide;

[0010] 0.5 - 5 parts of stearic acid;

[0011] 1 - 3 parts of sulfur;

[0012] 1 - 6 parts of silane coupling agent;

[0013] 1 - 5 parts of accelerator;

[0014] Antioxidant: 1 - 5 parts;

[0015] Among them, the olefin rubber is composed of 0 - 20 parts of natural rubber, 0 - 60 parts of solution styrene - butadiene rubber, 0 - 30 parts of cis - butadiene rubber, and 10 - 70 parts of iron - based butadiene - isoprene rubber by weight. The parts of natural rubber, solution styrene - butadiene rubber, and cis - butadiene rubber cannot be 0 at the same time. The molecular weight of the iron - based butadiene - isoprene rubber is 300,000 - 600,000, and the sum of the vinyl and propylene side - group contents is 50 - 70%.

[0016] Furthermore, it is specified that the iron - based butadiene - isoprene rubber is prepared by coordination polymerization using an iron - based catalyst. During the preparation process, the molar ratio of monomer butadiene to isoprene is (1 - 4):1, and the iron - based butadiene - isoprene rubber is a gel - free butadiene - isoprene rubber.

[0017] Furthermore, it is specified that the iron - based butadiene - isoprene rubber is composed of butadiene structural units and isoprene structural units. Among them, the molar content of 1,2 - butadiene in the butadiene structural units is 50 - 70%, the molar content of 1,4 - butadiene is 30 - 50%, the molar content of 3,4 - isoprene in the isoprene structural units is 30 - 50%, and the molar content of 1,4 - isoprene is 50 - 70%.

[0018] Furthermore, it is specified that the reinforcing filler is one or a mixture of carbon black, silica, talc powder, pottery powder, and calcium carbonate in any ratio.

[0019] Furthermore, it is specified that the plasticizer is one or a mixture of a cyclo - paraffin - based rubber plasticizer, an aromatic - based rubber plasticizer, and a naphthenic - based rubber plasticizer in any ratio.

[0020] Furthermore, it is specified that the silane coupling agent is one or a mixture of a sulfur - containing silane coupling agent, an amino - type silane coupling agent, and an epoxy - type silane coupling agent in any ratio.

[0021] Furthermore, it is specified that the accelerator is one or a mixture of thiazole - type accelerators, thiuram - type accelerators, sulfenamide - type accelerators, guanidine - type accelerators, and dithiocarbamate - type accelerators in any ratio.

[0022] Furthermore, it is specified that the antioxidant is one or a mixture of ketone - amine - type antioxidants, diaryl secondary - amine - type antioxidants, p - phenylenediamine - type antioxidants, and phenolic antioxidants in any ratio.

[0023] The preparation method of a high - wear - resistant tire tread composite material of the present invention is carried out according to the following steps:

[0024] Step 1: Add olefin rubber into a Banbury mixer, plastify at 120 - 135 °C for 180 - 240 s, let it stand for more than 4 h, then add reinforcing filler, zinc oxide, stearic acid, plasticizer, silane coupling agent and antioxidant, and mix at 135 - 150 °C for 240 - 300 s to obtain a mixed rubber.

[0025] Step 2: Add sulfur and accelerator into the mixed rubber and continue mixing to obtain a high wear-resistant tire tread composite material.

[0026] Application of a high wear-resistant tire tread composite material of the present invention.

[0027] Remarkable effects of the present invention compared with the prior art:

[0028] 1) By introducing iron-based butadiene-pentene rubber with vinyl and propenyl side group contents of 50 - 70% into the rubber composite material, the present invention has side groups of a certain volume that can enhance the intermolecular force of the butadiene-pentene rubber, making the butadiene-pentene rubber of the present invention have good wear resistance. When the side group content is less than 50%, it is not conducive to maintaining the wet skid resistance of the composite material of the present invention, and at the same time, its improvement effect on wear resistance is also worse than that of styrene-butadiene rubber; when the side group content is higher than 70%, the movement ability of the rubber molecular chain decreases, making the contribution of the increased intermolecular force due to the side group content to the improvement of wear resistance lower than the decrease in wear resistance caused by the poor chain flexibility of the molecular chain. Through the DIN abrasion test, it can be found that the abrasion loss of the rubber composite material of the present invention is greatly reduced, effectively improving the wear resistance of the tire while ensuring the wet skid resistance.

[0029] 2) The iron-based butadiene-pentene rubber of the present invention is composed of more butadiene structural units and has a relatively large number of vinyl side groups. The vinyl side groups occupy a smaller space volume compared with the benzene ring in solution styrene-butadiene rubber, making the molecular chain have better flexibility, thereby improving the wear resistance of the tire. At the same time, a certain amount of 1,4-butadiene structure needs to be maintained to further enhance the flexibility of the molecular chain, thereby further enhancing its wear resistance.

[0030] 3) There is a certain amount of 3,4-isoprene structural units in the iron-based butadiene-pentene rubber material of the present invention. The -CH3 therein has a strong electron-donating ability and is more likely to form C- ions, thus promoting the dispersion of the filler in the rubber matrix. On the other hand, a certain content of propenyl side groups enables the rubber composite material to have high wear resistance while taking into account good wet skid resistance.

[0031] 4) The iron-based butadiene-isoprene rubber of the present invention contains a certain amount of structural units of 1,2-butadiene, 1,4-butadiene, 1,4-isoprene and 3,4-isoprene. It has a high structural similarity with natural rubber, styrene-butadiene rubber and cis-butadiene rubber, can be better blended, and while improving the wear resistance, can ensure its high wet skid resistance and low rolling resistance performance. Detailed Embodiments

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The experimental methods used in the following embodiments are all conventional methods unless otherwise specified. The materials, reagents, methods and instruments used are all conventional materials, reagents, methods and instruments in the art, and can be obtained by those skilled in the art through commercial channels without special instructions.

[0034] The terms "comprising", "including", "having", "containing" or any other variation thereof used in the following embodiments are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or device containing the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article or device.

[0035] When an equivalent, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, it should be understood that all ranges formed by any combination of any range upper limit or preferred value and any range lower limit or preferred value are specifically disclosed, regardless of whether the ranges are separately disclosed. For example, when the range "1 to 5" is disclosed, the described range should be interpreted as including the ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range. In the specification and claims of the present application, range limitations can be combined and / or interchanged, and if not otherwise stated, these ranges include all sub-ranges contained therein.

[0036] The indefinite articles "a" and "an" before the elements or components of the present invention have no restrictive requirements on the quantity requirements (i.e., the number of occurrences) of the elements or components. Therefore, "a" or "an" should be interpreted as including one or at least one, and the singular form of the element or component also includes the plural form, unless the quantity clearly refers only to the singular form.

[0037] Example 1: The formulation of the high wear-resistant tire tread composite material in this example is shown in Table 1, and the performance test results are shown in Table 2;

[0038] Among them, the molecular weight of the iron-based butadiene-isoprene rubber is 485,000, the sum of the vinyl and propenyl side group contents is 53.6%, the iron-based butadiene-isoprene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomer butadiene to isoprene during the preparation process is 4:1. The iron-based butadiene-isoprene rubber is a gel-free butadiene-isoprene rubber;

[0039] The iron-based butadiene-isoprene rubber is composed of butadiene structural units and isoprene structural units. In the butadiene structural units, the molar content of 1,2-butadiene is 58%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 42%. In the isoprene structural units, the molar content of 3,4-isoprene is 36%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 64%.

[0040] The preparation method of the high wear-resistant tire tread composite material is carried out according to the following steps:

[0041] Step 1: Add 20# natural rubber, 9000 parts of cis-butadiene rubber, 626 parts of solution-polymerized styrene-butadiene rubber, and iron-based butadiene-isoprene rubber to the internal mixer. The filling coefficient is 0.7. Plasticize at 130 °C for 180 s and let it stand for more than 4 h. Then add 7000GR of white carbon black, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020, and antioxidant RD. The filling coefficient is 0.7. Knead at 145 °C for 240 s to obtain a kneaded rubber;

[0042] Step 2: Add sulfur, accelerator CZ, and accelerator DETU to the kneaded rubber and continue kneading to obtain a high wear-resistant tire tread composite material.

[0043] Example 2: The formulation of the high wear-resistant tire tread composite material in this example is shown in Table 1, and the performance test results are shown in Table 2;

[0044] Among them, the molecular weight of the iron-based butadiene-isoprene rubber is 463,000, the sum of the vinyl and propenyl side group contents is 57%, the iron-based butadiene-isoprene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomer butadiene to isoprene during the preparation process is 3:1. The iron-based butadiene-isoprene rubber is a gel-free butadiene-isoprene rubber;

[0045] The iron-based butadiene-isoprene rubber is composed of butadiene structural units and isoprene structural units. In the butadiene structural units, the molar content of 1,2-butadiene is 64%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 36%. In the isoprene structural units, the molar content of 3,4-isoprene is 36%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 64%.

[0046] The preparation method of the high wear-resistant tire tread composite material is carried out according to the following steps:

[0047] Step 1: Add 20# natural rubber, 9000 of cis-butadiene rubber, 626 of solution-polymerized styrene-butadiene rubber, and iron-based butadiene-isoprene rubber into a Banbury mixer. The filling coefficient is 0.7. Plasticize at 130 °C for 180 s, and let it stand for more than 4 h. Then add 7000GR of white carbon black, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020, and antioxidant RD. The filling coefficient is 0.7. Knead at 145 °C for 240 s to obtain a kneaded rubber;

[0048] Step 2: Add sulfur, accelerator CZ, and accelerator DETU to the kneaded rubber and continue kneading to obtain a high wear-resistant tire tread composite material.

[0049] Example 3: The formula of the high wear-resistant tire tread composite material in this example is shown in Table 1, and the performance test results are shown in Table 2;

[0050] Among them, the molecular weight of the iron-based butadiene-isoprene rubber is 364,000, and the sum of the contents of vinyl and propenyl side groups is 54%. The iron-based butadiene-isoprene rubber is prepared by coordination polymerization using an iron-based catalyst. During the preparation process, the molar ratio of monomer butadiene to isoprene is 2:1. The iron-based butadiene-isoprene rubber is a butadiene-isoprene rubber without gel;

[0051] The iron-based butadiene-isoprene rubber is composed of butadiene structural units and isoprene structural units. In the butadiene structural units, the molar content of 1,2-butadiene is 60%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 40%. In the isoprene structural units, the molar content of 3,4-isoprene is 42%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 58%.

[0052] The preparation method of the high wear-resistant tire tread composite material is carried out according to the following steps:

[0053] Step 1: Add 20# natural rubber, cis-1,4-polybutadiene 9000, solution-polymerized styrene-butadiene rubber 626, and iron-based butadiene-isoprene rubber into a Banbury mixer with a filling coefficient of 0.7. Plasticize at 130 °C for 180 s and let it stand for more than 4 h. Then add silica 7000GR, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020, and antioxidant RD with a filling coefficient of 0.7 and mix at 145 °C for 240 s to obtain a mixed rubber.

[0054] Step 2: Add sulfur, accelerator CZ, and accelerator DETU to the mixed rubber and continue mixing to obtain a high wear-resistant tire tread composite material.

[0055] Example 4: The formula of the high wear-resistant tire tread composite material in this example is shown in Table 1, and the performance test results are shown in Table 2.

[0056] Among them, the molecular weight of the iron-based butadiene-isoprene rubber is 405,000, the sum of the vinyl and propenyl side group contents is 52%, and the iron-based butadiene-isoprene rubber is prepared by coordination polymerization using an iron-based catalyst. During the preparation process, the molar ratio of monomer butadiene to isoprene is 1:1, and the iron-based butadiene-isoprene rubber is a gel-free butadiene-isoprene rubber.

[0057] The iron-based butadiene-isoprene rubber is composed of butadiene structural units and isoprene structural units. In the butadiene structural units, the molar content of 1,2-butadiene is 59%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 41%. In the isoprene structural units, the molar content of 3,4-isoprene is 45%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 55%.

[0058] The preparation method of the high wear-resistant tire tread composite material is carried out according to the following steps:

[0059] Step 1: Add 20# natural rubber, cis-1,4-polybutadiene 9000, solution-polymerized styrene-butadiene rubber 626, and iron-based butadiene-isoprene rubber into a Banbury mixer with a filling coefficient of 0.7. Plasticize at 130 °C for 180 s and let it stand for more than 4 h. Then add silica 7000GR, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020, and antioxidant RD with a filling coefficient of 0.7 and mix at 145 °C for 240 s to obtain a mixed rubber.

[0060] Step 2: Add sulfur, accelerator CZ, and accelerator DETU to the mixed rubber and continue mixing to obtain a high wear-resistant tire tread composite material.

[0061] Comparative Example 1: The difference between this comparative example and Example 1 is that no iron-based butadiene-isoprene rubber is added, and the amount of solution-polymerized styrene-butadiene rubber 626 is 70 parts. Other materials and preparation methods are the same as those in Example 1. The specific formula is shown in Table 1, and the performance test results are shown in Table 2.

[0062] Comparative Example 2: The difference between this comparative example and Example 1 is that the amount of iron-based butadiene-isoprene rubber is 50 parts, and the amount of solution-polymerized styrene-butadiene rubber 626 is 20 parts;

[0063] The molecular weight of the iron-based butadiene-isoprene rubber is 355,000, the sum of the vinyl and propenyl side group contents is 44%, the iron-based butadiene-isoprene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomer butadiene to isoprene during the preparation process is 1:1. The iron-based butadiene-isoprene rubber is a gel-free butadiene-isoprene rubber;

[0064] The iron-based butadiene-isoprene rubber is composed of butadiene structural units and isoprene structural units. In the butadiene structural units, the molar content of 1,2-butadiene is 44%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 56%. In the isoprene structural units, the molar content of 3,4-isoprene is 44%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 56%.

[0065] The specific formula is shown in Table 1, the preparation method is the same as that in Example 1, and the performance test results are shown in Table 2.

[0066] Comparative Example 3: The difference between this comparative example and Example 1 is that the amount of iron-based butadiene-isoprene rubber is 50 parts, and the amount of solution-polymerized styrene-butadiene rubber 626 is 20 parts;

[0067] The molecular weight of the iron-based butadiene-isoprene rubber is 368,000, the sum of the vinyl and propenyl side group contents is 50%, the iron-based butadiene-isoprene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of monomer butadiene to isoprene during the preparation process is 1:2. The iron-based butadiene-isoprene rubber is a gel-free butadiene-isoprene rubber;

[0068] The iron-based butadiene-isoprene rubber is composed of butadiene structural units and isoprene structural units. In the butadiene structural units, the molar content of 1,2-butadiene is 60%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 40%. In the isoprene structural units, the molar content of 3,4-isoprene is 45%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 55%.

[0069] The specific formula is shown in Table 1, the preparation method is the same as that in Example 1, and the performance test results are shown in Table 2.

[0070] Table 1 Formulation of Rubber Composite

[0071] Component Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Natural Rubber STR20 15.0 15.0 15.0 15.0 15.0 15.0 15.0 Solution Polymerized Styrene Butadiene Rubber NS626 0.0 20.0 40.0 60.0 70.0 20.0 20.0 Butadiene Rubber BR9000 15.0 15.0 15.0 15.0 15.0 15.0 15.0 Iron-based Catalyzed Butyl-pentyl Rubber 70.0 50.0 30.0 10.0 0.0 50.0 50.0 Aromatic Oil 10.0 10.0 10.0 10.0 10.0 10.0 10.0 Silica 7000GR 30.0 30.0 30.0 30.0 30.0 30.0 30.0 Carbon Black N330 40.0 40.0 40.0 40.0 40.0 40.0 40.0 Silane Coupling Agent Si-69 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Zinc Oxide ZnO 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Stearic Acid SA 1.8 1.8 1.8 1.8 1.8 1.8 1.8 Antioxidant 4020 2.0 2.0 2.0 2.0 2.0 2.0 2.0 Antioxidant RD 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Sulfur 2.0 2.0 2.0 2.0 2.0 2.0 2.0 Accelerator CZ 1.2 1.2 1.2 1.2 1.2 1.2 1.2 Accelerator DETU 0.6 0.6 0.6 0.6 0.6 0.6 0.6

[0072] Table 2 Properties of Rubber Composites

[0073]

[0074]

[0075] Analysis of the data in Table 2 shows that the addition of iron-based catalytic butadiene rubber, whether partially or completely replacing solution-polymerized styrene-butadiene rubber, has relatively obvious advantages. Compared with Comparative Example 1 and Comparative Examples 2 and 3, the abrasion loss of the composite material is greatly reduced and the wear resistance is improved. This is because the iron-based butadiene rubber in the present invention is composed of a suitable side group content and a large number of butadiene structural units, and at the same time has a relatively large vinyl content, thereby improving the wear resistance of the tire. And maintaining a certain amount of 1,4-butadiene structure can further enhance the flexibility of the molecular chain, thereby enhancing its wear resistance.

[0076] Since the iron-based butadiene rubber has a certain amount of 1,2-butadiene, 1,4-butadiene and 1,4-isoprene structural units, it has a high structural similarity with natural rubber, solution-polymerized styrene-butadiene rubber and cis-1,4-polybutadiene rubber, and can be better blended. Therefore, the tensile and tear mechanical properties of the composite material are improved to a certain extent. The Tanδ value at 0 °C is slightly higher than that of the comparative example, while the Tanδ value at 60 °C is slightly lower than that of the comparative example. It can improve the wear resistance while ensuring its high anti-wet skid and low rolling resistance performance, which has good application prospects in the manufacture of high-performance tires.

[0077] The above are only the preferred specific embodiments of the present invention. These specific embodiments are all different implementation manners based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A high wear-resistant tire tread composite material, characterized in that, It is prepared from the following components by weight parts: 100 parts of olefin rubber; 10 - 100 parts of reinforcing filler; 10 - 50 parts of plasticizer; 1 - 5 parts of zinc oxide; 0.5 - 5 parts of stearic acid; 1 - 3 parts of sulfur; 1 - 6 parts of silane coupling agent; 1 - 5 parts of accelerator; 1 - 5 parts of antioxidant; Among them, the olefin rubber is mixed by 0 - 20 parts of natural rubber, 0 - 60 parts of solution-polymerized styrene-butadiene rubber, 0 - 30 parts of cis-butadiene rubber and 10 - 70 parts of iron-based butadiene-pentadiene rubber by weight parts. The parts of natural rubber, solution-polymerized styrene-butadiene rubber and cis-butadiene rubber cannot be 0 at the same time. The molecular weight of the iron-based butadiene-pentadiene rubber is 300,000 - 600,000, and the sum of the vinyl and propylene side group contents is 50 - 70%. The iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst. During the preparation process, the molar ratio of monomer butadiene to isoprene is (3 - 4):

1. The iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber without gel. The iron-based butadiene-pentadiene rubber is composed of butadiene structural units and isoprene structural units. Among them, the molar content of 1,2-butadiene in the butadiene structural units is 50 - 70%, the molar content of 1,4-butadiene is 30 - 50%, the molar content of 3,4-isoprene in the isoprene structural units is 30 - 50%, and the molar content of 1,4-isoprene is 50 - 70%.

2. The high wear-resistant tire tread composite material according to claim 1, wherein The reinforcing filler is one or a mixture of several of carbon black, white carbon black, talcum powder, pottery powder and calcium carbonate.

3. The high wear-resistant tire tread composite material according to claim 1, characterized in that, The plasticizer is one or a mixture of several of cyclo-paraffin-based rubber plasticizer, aromatic-based rubber plasticizer and naphthenic-based rubber plasticizer.

4. The high wear-resistant tire tread composite material according to claim 1, characterized in that The silane coupling agent is a mixture of one or several of sulfur-containing silane coupling agent, amino-based silane coupling agent and epoxy-based silane coupling agent in any ratio.

5. The high wear-resistant tire tread composite material according to claim 1, wherein The accelerator is a mixture of one or several of thiazole type, thiuram type, sulfenamide type, guanidine type and dithiocarbamate type.

6. The high-wear-resistant tire tread composite material according to claim 1, wherein, The antioxidant is a mixture of one or several of ketoamine type, diaryl secondary amine type, p-phenylenediamine type and phenolic antioxidant.

7. The preparation method of the high wear-resistant tire tread composite material according to any one of claims 1-6, characterized in that, This method is carried out according to the following steps: Step 1: Add olefin rubber into an internal mixer, plastify at 120 - 135 °C for 180 - 240 s, let it stand for more than 4 h, then add the reinforcing filler, zinc oxide, stearic acid, plasticizer, silane coupling agent and antioxidant, and mix at 135 - 150 °C for 240 - 300 s to obtain a mixed rubber; Step 2: Add sulfur and accelerator to the mixed rubber and continue mixing to obtain a high wear-resistant tire tread composite material.

8. Application of the high wear-resistant tire tread composite material according to any one of claims 1 - 6.

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