A rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content, and its preparation method and application

Abstract

A rubber composite material based on high-butadiene-content iron-based butadiene-pentadiene rubber, and 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 problem that the existing modified composite rubber cannot balance the "devil's triangle" performance of rubber. 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, and the olefin rubber is mixed with natural rubber, solution-polymerized styrene-butadiene rubber, butadiene rubber and iron-based butadiene-pentadiene rubber. The molecular weight of the iron-based butadiene-pentadiene rubber is 50-80w, the molecular weight distribution is 1.5-2.5, the sum of the vinyl and propylene side group contents is 30-50%, and the molar ratio of monomer butadiene to isoprene during the preparation process is (1.5-9): 1. The material of the present invention is used as a tire tread rubber. The present invention effectively balances the "devil's triangle" performance of the rubber material.

Description

Technical Field

[0001] The invention belongs to the field of rubber materials and preparation thereof, and in particular relates to a rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content, and a preparation method and application thereof. Background Art

[0002] Fuel-saving, anti-slip, and highly wear-resistant tires are of great significance for energy conservation, environmental protection, and air pollution control. This is the future development trend of tire technology and industry. Compared with traditional tires, high-performance tires (also known as "green tires") can reduce rolling resistance by up to 35% and reduce automobile fuel consumption by up to 8%. If all cars in China are replaced with fuel-saving tires, 4 million tons of fuel can be saved each year and more than 10 million tons of carbon dioxide emissions can be reduced.

[0003] In order to balance the "devil's triangle" performance of rolling resistance, wet skidding, and wear, and to prepare high-performance tire rubber nanocomposites, not only high-performance basic rubber materials are needed, but also scientific rubber material composition design methods, advanced rubber nanocomposites preparation technology and tire processing methods are needed. These are both the most important basic scientific and technological issues in the field of rubber material science and engineering in the world, and also difficult problems. Therefore, it is of great significance to develop high-performance tires that can improve rolling resistance, anti-wet skidding, improve tire wear resistance and reduce wear and other performance. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that the existing modified composite rubber cannot balance the "devil's triangle" performance of rubber, and to provide a rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber and its preparation method and application.

[0005] The rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content of the present invention is prepared from the following components in parts by weight:

[0006] 100 parts of olefin rubber;

[0007] 10 to 100 parts of reinforcing filler;

[0008] 10-50 parts of plasticizer;

[0009] 1-5 parts of zinc oxide;

[0010] 1-6 parts of stearic acid;

[0011] 1-5 parts of sulfur;

[0012] 1 to 9 parts of silane coupling agent;

[0013] 1 to 10 parts of accelerator;

[0014] 1 to 10 parts of antioxidant;

[0015] The olefin rubber is mixed by weight of 0-20 parts of natural rubber, 0-60 parts of solution-polymerized styrene-butadiene rubber, 0-30 parts of cis-1,4-diene rubber and 10-60 parts of iron-based butadiene-elastomer rubber, wherein the parts of natural rubber, solution-polymerized styrene-butadiene rubber and cis-1,4-diene rubber cannot be 0 at the same time, the molecular weight of the iron-based butadiene-elastomer rubber is 50-80w, the molecular weight distribution is 1.5-2.5, the sum of the vinyl and propylene side group contents is 30-50%, and the molar ratio of the monomers butadiene to isoprene in the preparation process is (1.5-9):1.

[0016] It is further defined that the iron-based butadiene-pentadiene rubber is composed of butadiene structural units and isoprene structural units.

[0017] It is further defined that the molar content of 1,2-butadiene in the butadiene structural unit is 30-50%, the molar content of 1,4-butadiene is 50-70%, and the molar content of 3,4-isoprene in the isoprene structural unit is 30-50%, and the molar content of 1,4-isoprene is 50-70%.

[0018] It is further defined that the iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel.

[0019] It is further defined that the reinforcing filler is one or a mixture of any proportion of carbon black, white carbon black, talcum powder, ceramic powder and calcium carbonate.

[0020] It is further defined that the plasticizer is one or a mixture of any ratio of cycloparaffin-based rubber plasticizer, aromatic-based rubber plasticizer and cycloalkyl-based rubber plasticizer.

[0021] It is further defined that the accelerator is one or a mixture of any ratio of thiazole accelerators, thiuram accelerators, sulfenamide accelerators, guanidine accelerators and disulfide carbamate accelerators.

[0022] It is further defined that the antioxidant is one or a mixture of any ratio of ketoamine antioxidant, diaryl secondary amine antioxidant, p-phenylenediamine antioxidant and phenol antioxidant.

[0023] The preparation method of a rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content of the present invention is carried out by the following steps:

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

[0025] Step 2: Add sulfur and an accelerator to the mixed rubber and continue mixing to obtain a rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber.

[0026] The rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content of the invention is used for preparing tire tread.

[0027] Compared with the prior art, the present invention has the following significant effects:

[0028] 1) The iron-based butadiene-pentadiene rubber in the present invention has a narrower relative molecular weight distribution, a higher relative molecular weight (50W-80W) and an adjustable molecular chain structure, and thus has lower hysteresis loss and endogenous heat, thereby reducing the rolling resistance of the composite material.

[0029] 2) The iron-based butyl-pentene rubber with a high butadiene content of the present invention is a type of characteristic product. Compared with solution-polymerized styrene-butadiene rubber, it has a large number of vinyl side groups. Compared with the propylene group and the benzene ring, the vinyl group has a smaller steric hindrance, the spatial movement ability is enhanced, the flexibility of the molecular chain is enhanced, and when it is deformed under stress, the internal friction is reduced, thereby reducing its rolling resistance.

[0030] 3) The iron-based butyl-pentadiene rubber of the present invention also has a certain amount of propylene groups, which can increase the rigidity of the structural unit and improve the dynamic viscoelastic properties of the rubber, thereby ensuring its anti-slip performance while greatly reducing the rolling resistance. In addition, the presence of the 1,4-butadiene structural unit can further increase the flexibility of the molecular chain, thereby reducing the rolling resistance of the tire while ensuring its wear resistance.

[0031] 4) The iron-based butyl-pentene rubber of the present invention is composed of 1,2-butadiene, 1,4-butadiene, 1,4-isoprene and 3,4-isoprene structural units, and has a high structural similarity with natural rubber, styrene-butadiene rubber and butadiene rubber, and can be better blended, while reducing rolling resistance, ensuring its high wear resistance and high anti-wet skid performance. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the 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 examples are conventional methods unless otherwise specified. The materials, reagents, methods and instruments used are conventional materials, reagents, methods and instruments in the art unless otherwise specified, and can be obtained through commercial channels by those skilled in the art.

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

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

[0036] The indefinite articles "a" and "an" before the elements or components of the present invention have no limitation 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 elements or components in the singular form also include the plural form, unless the quantity obviously refers to the singular form only.

[0037] Example 1: The formula of the rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber of this example is shown in Table 1, and the performance test results are shown in Table 2;

[0038] The molecular weight of the iron-based butadiene-pentadiene rubber is 52.5w, the molecular weight distribution is 1.8, the sum of the vinyl and propylene side group contents is 38%, the iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of the monomers butadiene to isoprene during the preparation process is 9:1, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel;

[0039] The iron-based butadiene-vinyl rubber is composed of butadiene structural units and isoprene structural units. The molar content of 1,2-butadiene in the butadiene structural units is 38%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 62%. The molar content of 3,4-isoprene in the isoprene structural units is 38%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 62%.

[0040] The preparation method of the rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content is carried out according to the following steps:

[0041] Step 1, add 20# natural rubber, cis-1,4-butadiene rubber 9000, solution polymerized styrene-butadiene rubber NS626, and iron-based butylene-pentadiene rubber into an internal mixer, with a filling factor of 0.7, and plasticize for 180 seconds at 130° C., let stand for more than 4 hours, then add white carbon black 7000GR, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020 and antioxidant RD, with a filling factor of 0.7, and mix at 145° C. for 240 seconds to obtain a mixed rubber;

[0042] Step 2: Add sulfur, accelerator CZ and accelerator DETU to the mixed rubber and continue mixing to obtain a rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber.

[0043] Example 2: The formula of the rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber of this example is shown in Table 1, and the performance test results are shown in Table 2;

[0044] The molecular weight of the iron-based butadiene-pentadiene rubber is 58.3w, the molecular weight distribution is 1.7, the sum of the vinyl and propylene side group contents is 42.8%, the iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of the monomers butadiene to isoprene during the preparation process is 8:2, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel;

[0045] The iron-based butadiene-vinyl rubber is composed of butadiene structural units and isoprene structural units. The molar content of 1,2-butadiene in the butadiene structural units is 44%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 56%. The molar content of 3,4-isoprene in the isoprene structural units is 38%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 62%.

[0046] The preparation method of the rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content is carried out according to the following steps:

[0047] Step 1, add 20# natural rubber, cis-1,4-butadiene rubber 9000, solution polymerized styrene-butadiene rubber NS626, and iron-based butylene-pentadiene rubber into an internal mixer, with a filling factor of 0.7, and plasticize for 180 seconds at 130° C., let stand for more than 4 hours, then add white carbon black 7000GR, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020 and antioxidant RD, with a filling factor of 0.7, and mix at 145° C. for 240 seconds to obtain a mixed rubber;

[0048] Step 2: Add sulfur, accelerator CZ and accelerator DETU to the mixed rubber and continue mixing to obtain a rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber.

[0049] Example 3: The formula of the rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber of this example is shown in Table 1, and the performance test results are shown in Table 2;

[0050] The molecular weight of the iron-based butadiene-pentadiene rubber is 62.4w, the molecular weight distribution is 1.9, the sum of the vinyl and propylene side group contents is 37.6%, the iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of the monomers butadiene to isoprene during the preparation process is 7:3, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel;

[0051] The iron-based butadiene-vinyl rubber is composed of butadiene structural units and isoprene structural units. The molar content of 1,2-butadiene in the butadiene structural units is 40%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 60%. The molar content of 3,4-isoprene in the isoprene structural units is 32%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 68%.

[0052] The preparation method of the rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content is carried out according to the following steps:

[0053] Step 1, add 20# natural rubber, cis-1,4-butadiene rubber 9000, solution polymerized styrene-butadiene rubber NS626, and iron-based butylene-pentadiene rubber into an internal mixer, with a filling factor of 0.7, and plasticize for 180 seconds at 130° C., let stand for more than 4 hours, then add white carbon black 7000GR, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020 and antioxidant RD, with a filling factor of 0.7, and mix at 145° C. for 240 seconds 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 rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber.

[0055] Example 4: The formula of the rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber of this example is shown in Table 1, and the performance test results are shown in Table 2;

[0056] The molecular weight of the iron-based butadiene-pentadiene rubber is 68.5w, the molecular weight distribution is 1.8, the sum of the vinyl and propylene side group contents is 39.4%, the iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of the monomers butadiene to isoprene during the preparation process is 6:4, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel;

[0057] The iron-based butadiene-vinyl rubber is composed of butadiene structural units and isoprene structural units. The molar content of 1,2-butadiene in the butadiene structural units is 45%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 55%. The molar content of 3,4-isoprene in the isoprene structural units is 31%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 69%.

[0058] The preparation method of the rubber composite material based on iron-based butadiene-pentadiene rubber with high butadiene content is carried out according to the following steps:

[0059] Step 1, add 20# natural rubber, cis-1,4-butadiene rubber 9000, solution polymerized styrene-butadiene rubber NS626, and iron-based butylene-pentadiene rubber into an internal mixer, with a filling factor of 0.7, and plasticize for 180 seconds at 130° C., let stand for more than 4 hours, then add white carbon black 7000GR, carbon black N330, zinc oxide, stearic acid, aromatic oil, silane coupling agent Si-69, antioxidant 4020 and antioxidant RD, with a filling factor of 0.7, and mix at 145° C. for 240 seconds 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 rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber.

[0061] Comparative Example 1: The difference between this comparative example and Example 1 is that no iron-based butyl ethylene rubber is added, and the number of parts of solution-polymerized styrene butadiene rubber NS626 is 65 parts. Other materials and preparation methods are the same as those in Example 1, and the specific formula is shown in Table 1. The performance test results are shown in Table 2.

[0062] Comparative Example 2: The specific formula of the rubber composite material of this comparative example is shown in Table 1;

[0063] The molecular weight of the iron-based butadiene-pentadiene rubber is 55.5w, the molecular weight distribution is 2.1, the sum of the vinyl and propylene side group contents is 40.8%, the iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the molar ratio of the monomers butadiene to isoprene during the preparation process is 6:4, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel;

[0064] The iron-based butadiene-vinyl rubber is composed of butadiene structural units and isoprene structural units. The molar content of 1,2-butadiene in the butadiene structural units is 42%, and the sum of the molar contents of cis-1,4-butadiene and trans-1,4-butadiene is 58%. The molar content of 3,4-isoprene in the isoprene structural units is 39%, and the sum of the molar contents of cis-1,4-isoprene and trans-1,4-isoprene is 61%.

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

[0066] Table 1 Formulation of rubber composite materials

[0067]

[0068]

[0069] Table 2 Rubber composite material properties

[0070] Performance parameters Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Tensile Strength 24.62 24.35 24.27 24.13 21.32 22.31 100% tensile stress, MPa 3.45 3.33 3.32 3.41 2.31 2.62 300% tensile stress, MPa 14.51 14.32 14.27 14.21 11.34 12.21 Elongation at break, % 540.01 538.64 536.45 528.64 501.3 515.5 Shore Hardness 57 58 58 59 60 60 Tear strength, KN / m 23.7 23.5 23.9 23.3 19.1 18.8 Tanδ,0℃ 0.4396 0.3989 0.3687 0.3296 0.2190 0.2598 Tanδ,60℃ 0.1602 0.1732 0.1884 0.1998 0.2213 0.2292 <![CDATA[DIN wear, mm 3 / 40m]]> 0.1879 0.1922 0.1954 0.1990 0.2197 0.2212

[0071] Analysis of the data in Table 2 shows that the addition of iron-based butyl-pentyl rubber to replace solution-polymerized styrene-butadiene rubber has obvious advantages. Compared with the comparative example, the Tanδ value at 60°C is significantly lower than that of the comparative example, and the maximum rolling resistance performance can be improved by about 40%. This is because (1) the iron-based catalyzed butyl-pentyl rubber of the invention has a narrower relative molecular mass distribution, a higher relative molecular mass (50W-80W) and a controllable molecular chain structure, and thus has lower hysteresis loss and endogenous heat, thereby reducing the rolling resistance of the composite material. (2) When the tire is added with the butyl-pentyl rubber, compared with the solution-polymerized styrene-butadiene rubber, it has a large number of vinyl side groups. The vinyl group has a smaller steric hindrance than the propylene group and the benzene ring, the spatial movement ability is enhanced, the flexibility of the molecular chain is enhanced, and when it is deformed under stress, the internal friction is reduced, thereby reducing its rolling resistance.

[0072] At the same time, the iron-based butyl-pentene rubber in the present invention is composed of 1,2-butadiene, 1,4-butadiene, 1,4-isoprene and 3,4-isoprene structural units, which have a high structural similarity with natural rubber, styrene-butadiene rubber and butadiene rubber, and can be better blended, so that the tensile strength, elongation at break and tear strength of the composite material are all improved to a certain extent. And the Tanδ value at 0°C is slightly higher than that of the comparative example, because the composite material has a certain content of propylene, which can increase the rigidity of the structural unit and improve the dynamic viscoelastic properties of the rubber, thereby ensuring its anti-wet and skid resistance. DIN wear is lower than that of the comparative example, because the presence of 1,4-butadiene structural units in the composite material can further increase the flexibility of the molecular chain, so that the wear resistance of the tire is improved to a certain extent. In summary, the composite material can ensure its high wear resistance and low rolling resistance while improving the anti-wet and skid resistance, which has a good application prospect in the manufacture of high-performance tires.

[0073] The above are only preferred specific embodiments of the present invention, which are all different implementations 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 a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber, characterized in that: It is prepared from the following components by weight: 100 parts of olefin rubber; 10 to 100 parts of reinforcing filler; 10-50 parts of plasticizer; 1-5 parts of zinc oxide; 1-6 parts of stearic acid; 1-5 parts of sulfur; 1 to 9 parts of silane coupling agent; 1 to 10 parts of accelerator; 1 to 10 parts of antioxidant; The olefin rubber is mixed by weight of 0-20 parts of natural rubber, 0-60 parts of solution-polymerized styrene-butadiene rubber, 0-30 parts of cis-1,4-butadiene rubber and 10-60 parts of iron-based butadiene-elastomer rubber, wherein the parts of natural rubber, solution-polymerized styrene-butadiene rubber and cis-1,4-butadiene rubber cannot be 0 at the same time, the molecular weight of the iron-based butadiene-elastomer rubber is 50-80w, the molecular weight distribution is 1.5-2.5, the sum of the vinyl and propylene side group contents is 30-50%, the molar ratio of monomers butadiene to isoprene during the preparation process is (1.5-9):1, and the iron-based butadiene-elastomer rubber is composed of butadiene structural units and isoprene structural units, the molar content of 1,2-butadiene in the butadiene structural units is 30-50%, the molar content of 1,4-butadiene is 50-70%, 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 rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to claim 1, characterized in that: The iron-based butadiene-pentadiene rubber is prepared by coordination polymerization using an iron-based catalyst, and the iron-based butadiene-pentadiene rubber is a butadiene-pentadiene rubber that does not contain gel.

3. The rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to claim 1, characterized in that: The reinforcing filler is one or a mixture of carbon black, white carbon black, talcum powder, ceramic powder and calcium carbonate.

4. The rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to claim 1, characterized in that: The plasticizer is one or a mixture of cycloparaffin-based rubber plasticizer, aromatic-based rubber plasticizer and cycloalkyl rubber plasticizer.

5. The rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to claim 1, characterized in that: The accelerator is one or a mixture of thiazoles, thiurams, sulfenamides, guanidines and disulfide carbamates.

6. The rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to claim 1, characterized in that: The antioxidant is one or a mixture of ketoamines, diaryl secondary amines, p-phenylenediamines and phenol antioxidants.

7. The method for preparing a rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to any one of claims 1 to 6, characterized in that: The method proceeds as follows: Step 1: Add olefin rubber to an internal mixer, plasticize at 120-135°C for 180-240s, let stand for more than 4h, then add reinforcing filler, zinc oxide, stearic acid, plasticizer, silane coupling agent and antioxidant, mix at 135-150°C for 240-300s to obtain a mixed rubber; Step 2: Add sulfur and an accelerator to the mixed rubber and continue mixing to obtain a rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber.

8. The rubber composite material based on high butadiene content iron-based butadiene-pentadiene rubber according to any one of claims 1 to 6 is used for preparing tire treads.

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