Rubber reinforcing agent, high-strength rubber and preparation method thereof

Abstract

The invention relates to the technical field of rubber reinforcing agents, in particular to a rubber reinforcing agent, high-strength rubber and a preparation method of the high-strength rubber. The rubber reinforcing agent comprises a foam metal matrix and ultra-high molecular weight polyethylene fibers entangled with the foam metal matrix. The material formed by entangling the foam metal matrix and the ultra-high molecular weight polyethylene fiber is selected as a main reinforcing agent component, and the foam metal matrix provides good strength and rigidity, so that the mechanical property of the rubber can be effectively enhanced. The ultra-high molecular weight polyethylene fiber has excellent tensile strength and wear resistance, and can significantly improve the durability and service life of the rubber. According to the combination, the bearing capacity and the impact resistance of the rubber can be remarkably improved while the flexibility of the rubber is maintained, so that the mechanical property of a rubber material is effectively reinforced.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber reinforcing agents, in particular to a rubber reinforcing agent, high-strength rubber and a preparation method thereof. Background Art

[0002] Reinforcing fillers are essential in the preparation of rubber compounds. They help disperse stress within the rubber macromolecules when subjected to external forces, effectively improving the rubber's mechanical properties. Fillers come in a wide variety of types and functions, and their particle size, surface properties, and morphology all influence their reinforcing properties. Therefore, exploring suitable reinforcing fillers to improve the mechanical properties of rubber is of great research significance in the rubber industry.

[0003] Commonly used rubber reinforcing fillers are carbon black and silica. However, carbon black is primarily derived from the pyrolysis of petrochemical products and is a non-renewable resource. Furthermore, the production process is complex and produces many environmentally harmful substances.

[0004] In response to the above-mentioned prior art, the inventors found that the carbon black and silica materials commonly used in existing rubber reinforcing fillers may cause accelerated aging of rubber due to the black color of carbon black and its high sensitivity to light and ozone. When silica is used as a reinforcing material, its mechanical properties and reinforcement performance are poor, and it has limitations for use in high-load and high-strength scenarios. Summary of the Invention

[0005] In order to improve the above technical problems, the present application provides a rubber reinforcing agent, a high-strength rubber and a preparation method thereof.

[0006] A rubber reinforcing agent adopts the following technical solution:

[0007] A rubber reinforcing agent comprises a foam metal matrix and ultra-high molecular weight polyethylene fibers entangled with the foam metal matrix.

[0008] Through the above technical solution, this application uses a material formed by entanglement of a foam metal matrix and ultra-high molecular weight polyethylene fibers as the primary reinforcing agent component. Because the foam metal matrix provides excellent strength and rigidity, it can effectively enhance the mechanical properties of the rubber. The ultra-high molecular weight polyethylene fibers have excellent tensile strength and abrasion resistance, significantly improving the durability and service life of the rubber. This combination significantly enhances the load-bearing capacity and impact resistance of the rubber while maintaining its flexibility, effectively reinforcing the mechanical properties of the rubber material.

[0009] Furthermore, the porosity of the foam metal matrix is ​​60-70%, and the yield strength is 28.5-36.5 MPa.

[0010] Through the above technical solution, the present application optimizes the performance of the foam metal matrix. By adjusting the appropriate porosity, its good pore structure helps to better disperse and combine in the rubber, thereby improving the interaction between the filler and the rubber. At the same time, the present application optimizes the range of yield strength, ensuring that the reinforcing agent has good mechanical properties when subjected to external forces, so that when it is added and used in rubber materials, it has good structural stability and excellent mechanical properties.

[0011] Furthermore, the foam metal matrix includes any one of a foam nickel matrix, a foam iron nickel matrix or a foam magnesium matrix.

[0012] Furthermore, the foam metal matrix is ​​also filled with an impact-resistant modifying material, and the impact-resistant modifying material is silicone rubber elastomer particles.

[0013] Through the above technical solution, this application introduces an impact-modified material, using silicone rubber elastomer particles to fill a foam metal matrix. This composite material design significantly enhances the rubber's impact resistance, especially when subjected to instantaneous impact. Silicone rubber has excellent elasticity and high-temperature resistance, and can maintain its physical properties in extreme environments. In addition, the addition of silicone rubber particles helps improve the material's affinity and compatibility, strengthening the bonding between the filler and the rubber matrix, thereby further enhancing the overall performance and application range of the final product.

[0014] In a second aspect, the present application provides a method for preparing a rubber reinforcing agent, which adopts the following technical solution:

[0015] A method for preparing a rubber reinforcing agent comprises the following steps:

[0016] The foam metal substrate was placed at room temperature and ultrasonically cleaned with ethanol and acetone respectively. After cleaning, it was dried and set aside.

[0017] Place ultra-high molecular weight polyethylene fiber in silicone rubber solution, stir and mix, and ultrasonically disperse, and collect the dispersed slurry;

[0018] After the dispersed slurry is taken and subjected to vacuum degassing treatment, the cleaned foam metal substrate is immersed in the dispersed slurry, vacuum impregnated and cured at room temperature, and then crushed to prepare a rubber reinforcing agent.

[0019] Through the above technical solution, this application first removes impurities from the foam metal matrix through ultrasonic cleaning to improve its bonding performance with the polyethylene fibers. Next, by mixing the ultra-high molecular weight polyethylene fibers with the silicone rubber solution and ultrasonically dispersing them, the fibers are evenly distributed within the rubber matrix, achieving a good reinforcement effect. Vacuum degassing helps remove bubbles, improves the density of the material during the preparation process, and ensures the uniformity and performance consistency of the final product.

[0020] Furthermore, the silicone rubber solution is prepared by mixing room temperature vulcanized silicone rubber and acetone in a mass ratio of 1:5-8.

[0021] Through the above technical solution, the present application optimizes the mixing ratio of rubber and solvent in the silicone rubber solution to ensure good fluidity and adhesion. Room temperature vulcanized silicone rubber can be cured at room temperature, avoiding material deformation or performance degradation that may occur during high-temperature curing. In addition, the appropriate solvent ratio can ensure good dispersion of polyethylene fibers in the solution, further improving the mechanical properties of the reinforcing agent. The choice of silicone rubber not only provides heat resistance and oil resistance, but also enables the rubber reinforcing agent to have better weather resistance and aging resistance, thereby extending its service life.

[0022] Furthermore, the foam metal substrate is a surface-treated foam metal substrate, and the surface treatment includes the following processing steps:

[0023] The surface treatment step is completed by placing the foam metal substrate in a micro-arc oxidation device, adding an electrolyte and performing micro-arc oxidation treatment.

[0024] Furthermore, the electrolyte includes the following substances in parts by weight:

[0025] NaAlO2 8-15 parts;

[0026] KF 3-5 servings;

[0027] NaOH 0.5-1.5 parts.

[0028] Through the above technical solution, this application uses micro-arc oxidation technology to form a dense oxide film on the surface of the metal substrate, enhancing the metal's corrosion resistance and wear resistance while also improving its adhesion to the polymer. This surface modification not only facilitates the bonding of the filler to the rubber, but also improves the overall performance of the rubber reinforcement, especially in harsh environments.

[0029] In a third aspect, the present application provides a high-strength rubber, which adopts the following technical solution:

[0030] A high-strength rubber comprising the rubber reinforcing agent according to claims 1-8.

[0031] According to the above technical solution, the high-strength rubber prepared in this application has good mechanical strength and mechanical properties.

[0032] In summary, this application has the following beneficial effects:

[0033] First, this application uses a material composed of a foamed metal matrix entangled with ultra-high molecular weight polyethylene fibers as the primary reinforcing agent. The foamed metal matrix provides excellent strength and rigidity, effectively enhancing the mechanical properties of the rubber. The ultra-high molecular weight polyethylene fibers possess excellent tensile strength and abrasion resistance, significantly improving the durability and service life of the rubber. This combination maintains the rubber's flexibility while significantly enhancing its load-bearing capacity and impact resistance, effectively reinforcing the mechanical properties of the rubber material.

[0034] Second, this application introduces an impact-modified material, using silicone rubber elastomer particles to fill a foam metal matrix. This composite material design significantly enhances the rubber's impact resistance, especially when subjected to instantaneous impact. Silicone rubber has excellent elasticity and high-temperature resistance, and can maintain its physical properties in extreme environments. In addition, the addition of silicone rubber particles helps improve the material's affinity and compatibility, strengthening the bonding between the filler and the rubber matrix, thereby further enhancing the overall performance and application range of the final product.

[0035] Third, this application first removes impurities from the foam metal matrix through ultrasonic cleaning to improve its bonding with the polyethylene fibers. Next, by mixing the ultra-high molecular weight polyethylene fibers with the silicone rubber solution and ultrasonically dispersing them, the fibers are evenly distributed within the rubber matrix, achieving a good reinforcement effect. Vacuum degassing helps remove bubbles, improves the density of the material during the preparation process, and ensures the uniformity and performance consistency of the final product. DETAILED DESCRIPTION

[0036] The present application is further described in detail below with reference to the embodiments.

[0037] The raw materials and instruments used in the examples of this application are as follows, but not limited thereto:

[0038] Ultra-high molecular weight polyethylene fiber: produced by Shandong Yiheng Engineering Materials Co., Ltd., with an elastic modulus of ≥35000MPa;

[0039] Room temperature vulcanized silicone rubber: Shanghai Huiping New Energy Co., Ltd.: SE9186RTV;

[0040] Styrene butadiene rubber: Jinan Yanglan New Material Technology Co., Ltd.: CAS: 9003-55-8.

[0041] The present application is further described in detail below with reference to the embodiments.

[0042] Preparation Example 1

[0043] Electrolyte 1

[0044] 80 g of sodium aluminate, 20 g of KF, 5 g of NaOH and 800 g of deionized water were taken and stirred to prepare electrolyte 1.

[0045] Preparation Example 2

[0046] Electrolyte 2

[0047] 110 g of sodium aluminate, 35 g of KF, 10 g of NaOH and 900 g of deionized water were taken and stirred to prepare electrolyte 2.

[0048] Preparation Example 3

[0049] Electrolyte 3

[0050] 150 g of sodium aluminate, 50 g of KF, 15 g of NaOH and 1000 g of deionized water were taken and stirred to prepare electrolyte 3.

[0051] Preparation Example 4

[0052] Silicone rubber solution 1

[0053] Room temperature vulcanized silicone rubber and acetone were mixed in a mass ratio of 1:5 to prepare a silicone rubber solution 1.

[0054] Preparation Example 5

[0055] Silicone rubber solution 2

[0056] Room temperature vulcanized silicone rubber and acetone were mixed in a mass ratio of 1:6.5 to prepare silicone rubber solution 2.

[0057] Preparation Example 6

[0058] Silicone rubber solution 3

[0059] Room temperature vulcanized silicone rubber and acetone were mixed in a mass ratio of 1:8 to prepare silicone rubber solution 3.

[0060] Example 1

[0061] A preparation method of a rubber reinforcing agent:

[0062] A magnesium foam with a porosity of 60% and a yield strength of 28.5 MPa was placed at room temperature and ultrasonically cleaned with ethanol and acetone, respectively. After cleaning, the foam was dried and set aside.

[0063] The cleaned magnesium foam was placed in a micro-arc oxidation device, and electrolyte 1 was added and the current density was set at 1.5A / dm 2 The surface treatment step can be completed by micro-arc oxidation treatment for 30 minutes.

[0064] 100g of ultra-high molecular weight polyethylene fiber with a length of 1-2mm, 1000g of 8% polyvinyl alcohol solution and 5000g of surface-treated foamed magnesium particles were placed under high-speed stirring at 1500r / min for 20 minutes. After the stirring was completed, the mixture was placed under 60°C and dried for 6 hours to prepare a rubber reinforcing agent.

[0065] A method for preparing high-strength rubber comprises the following steps: taking 100g of styrene-butadiene rubber and performing open mill mixing; adding 1.5g of accelerator CZ, 1.5g of antioxidant 4010, 2g of stearic acid, 2g of sulfur and 20g of rubber reinforcing agent at a time; mixing to prepare a rubber mix; storing the rubber mix at room temperature for 24h; and vulcanizing the rubber mix at 160°C for 30min in a vulcanizer to prepare the high-strength rubber.

[0066] Example 2

[0067] A foamed nickel iron with a porosity of 65% and a yield strength of 30 MPa was placed at room temperature and ultrasonically cleaned with ethanol and acetone, respectively. After cleaning, the foamed nickel iron was dried and set aside.

[0068] The cleaned magnesium foam was placed in a micro-arc oxidation device, and electrolyte 2 was added and the current density was set at 1.5A / dm 2 The surface treatment step can be completed by micro-arc oxidation treatment for 30 minutes.

[0069] 100g of ultra-high molecular weight polyethylene fiber with a length of 1-2mm, 1000g of 8% polyvinyl alcohol solution and 5000g of surface-treated foamed magnesium particles were placed under high-speed stirring at 1500r / min for 20 minutes. After the stirring was completed, the mixture was placed under 60°C and dried for 6 hours to prepare a rubber reinforcing agent.

[0070] A method for preparing high-strength rubber comprises the following steps: taking 100g of styrene-butadiene rubber and performing open mill mixing; adding 1.5g of accelerator CZ, 1.5g of antioxidant 4010, 2g of stearic acid, 2g of sulfur and 20g of rubber reinforcing agent at a time; mixing to prepare a rubber mix; storing the rubber mix at room temperature for 24h; and vulcanizing the rubber mix at 160°C for 30min in a vulcanizer to prepare the high-strength rubber.

[0071] Example 3

[0072] A nickel foam with a porosity of 70% and a yield strength of 36.5 MPa was placed at room temperature and ultrasonically cleaned with ethanol and acetone, respectively. After cleaning, the foam was dried and set aside.

[0073] The cleaned magnesium foam was placed in a micro-arc oxidation device, and electrolyte 3 was added and the current density was set at 1.5A / dm 2The surface treatment step can be completed by micro-arc oxidation treatment for 30 minutes.

[0074] 100g of ultra-high molecular weight polyethylene fiber with a length of 1-2mm, 1000g of 8% polyvinyl alcohol solution and 5000g of surface-treated foamed magnesium particles were placed under high-speed stirring at 1500r / min for 20 minutes. After the stirring was completed, the mixture was placed under 60°C and dried for 6 hours to prepare a rubber reinforcing agent.

[0075] A method for preparing high-strength rubber comprises the following steps: taking 100g of styrene-butadiene rubber and performing open mill mixing; adding 1.5g of accelerator CZ, 1.5g of antioxidant 4010, 2g of stearic acid, 2g of sulfur and 20g of rubber reinforcing agent at a time; mixing to prepare a rubber mix; storing the rubber mix at room temperature for 24h; and vulcanizing the rubber mix at 160°C for 30min in a vulcanizer to prepare the high-strength rubber.

[0076] Example 4

[0077] A preparation method of a rubber reinforcing agent:

[0078] A magnesium foam with a porosity of 60% and a yield strength of 28.5 MPa was placed at room temperature and ultrasonically cleaned with ethanol and acetone, respectively. After cleaning, the foam was dried and set aside.

[0079] The cleaned magnesium foam was placed in a micro-arc oxidation device, and electrolyte 1 was added and the current density was set at 1.5A / dm 2 The surface treatment step is completed by micro-arc oxidation treatment for 30 minutes;

[0080] 100 g of ultra-high molecular weight polyethylene fiber (1-2 mm in length) was placed in the silicone rubber solution 1, stirred and mixed, and subjected to ultrasonic dispersion treatment at 200 W to collect the dispersed slurry;

[0081] The dispersed slurry was taken and subjected to vacuum degassing treatment, and then 5000 g of surface-treated foamed magnesium particles were immersed in the dispersed slurry. After vacuum impregnation treatment and curing treatment at room temperature, the particles were crushed to prepare a rubber reinforcing agent.

[0082] A method for preparing high-strength rubber comprises the following steps: taking 100g of styrene-butadiene rubber and performing open mill mixing; adding 1.5g of accelerator CZ, 1.5g of antioxidant 4010, 2g of stearic acid, 2g of sulfur and 20g of rubber reinforcing agent at a time; mixing to prepare a rubber mix; storing the rubber mix at room temperature for 24h; and vulcanizing the rubber mix at 160°C for 30min in a vulcanizer to prepare the high-strength rubber.

[0083] Example 5

[0084] A preparation method of a rubber reinforcing agent:

[0085] A magnesium foam with a porosity of 60% and a yield strength of 28.5 MPa was placed at room temperature and ultrasonically cleaned with ethanol and acetone, respectively. After cleaning, the foam was dried and set aside.

[0086] The cleaned magnesium foam was placed in a micro-arc oxidation device, and electrolyte 1 was added and the current density was set at 1.5A / dm 2 The surface treatment step is completed by micro-arc oxidation treatment for 30 minutes;

[0087] 100 g of ultra-high molecular weight polyethylene fiber (1-2 mm in length) was placed in the silicone rubber solution 2, stirred and mixed, and subjected to ultrasonic dispersion treatment at 200 W to collect the dispersed slurry;

[0088] The dispersed slurry was taken and subjected to vacuum degassing treatment, and then 5000 g of surface-treated foamed magnesium particles were immersed in the dispersed slurry. After vacuum impregnation treatment and curing treatment at room temperature, the particles were crushed to prepare a rubber reinforcing agent.

[0089] A method for preparing high-strength rubber comprises the following steps: taking 100g of styrene-butadiene rubber and performing open mill mixing; adding 1.5g of accelerator CZ, 1.5g of antioxidant 4010, 2g of stearic acid, 2g of sulfur and 20g of rubber reinforcing agent at a time; mixing to prepare a rubber mix; storing the rubber mix at room temperature for 24h; and vulcanizing the rubber mix at 160°C for 30min in a vulcanizer to prepare the high-strength rubber.

[0090] Example 6

[0091] A preparation method of a rubber reinforcing agent:

[0092] A magnesium foam with a porosity of 60% and a yield strength of 28.5 MPa was placed at room temperature and ultrasonically cleaned with ethanol and acetone, respectively. After cleaning, the foam was dried and set aside.

[0093] The cleaned magnesium foam was placed in a micro-arc oxidation device, and electrolyte 1 was added and the current density was set at 1.5A / dm 2 The surface treatment step is completed by micro-arc oxidation treatment for 30 minutes;

[0094] Place 100 g of ultra-high molecular weight polyethylene fiber (1-2 mm in length) into the silicone rubber solution 3, stir and mix, and subject to ultrasonic dispersion treatment at 200 W to collect the dispersed slurry;

[0095] The dispersed slurry was taken and subjected to vacuum degassing treatment, and then 5000 g of surface-treated foamed magnesium particles were immersed in the dispersed slurry. After vacuum impregnation treatment and curing treatment at room temperature, the particles were crushed to prepare a rubber reinforcing agent.

[0096] A method for preparing high-strength rubber comprises the following steps: taking 100g of styrene-butadiene rubber and performing open mill mixing; adding 1.5g of accelerator CZ, 1.5g of antioxidant 4010, 2g of stearic acid, 2g of sulfur and 20g of rubber reinforcing agent at a time; mixing to prepare a rubber mix; storing the rubber mix at room temperature for 24h; and vulcanizing the rubber mix at 160°C for 30min in a vulcanizer to prepare the high-strength rubber.

[0097] Comparative Example 1

[0098] Compared with Example 1, Comparative Example 1 uses foamed magnesium with a porosity of 60% and a yield strength of 28.5 MPa as a rubber reinforcing agent, and the remaining preparation steps are the same as those of Example 1.

[0099] Comparative Example 2

[0100] Compared with Example 1, Comparative Example 2 uses an equal mass of carbon black as a rubber reinforcing agent, and the remaining preparation steps are the same as those of Example 1.

[0101] It should be noted that the rubber material used in this application includes but is not limited to any one of styrene-butadiene rubber and natural rubber.

[0102] Performance testing

[0103] Mechanical properties of the high-strength rubbers prepared in Examples 1-6 were tested:

[0104] The tensile strength of the vulcanized rubber is tested according to GB / T 528-1998; the tear strength of the vulcanized rubber is tested according to GB / T 529-1999;

[0105] The details are shown in Table 1 below:

[0106] Table 1 Performance test table

[0107] project Tensile strength / MPa Tear strength / kN / m Example 1 26.41 58.46 Example 2 27.37 59.53 Example 3 26.87 58.62 Example 4 29.53 62.34 Example 5 30.31 63.51 Example 6 29.66 62.19 Comparative Example 1 19.45 48.39 Comparative Example 2 18.25 44.61

[0108] From the above examples 1-6, comparative examples 1-2 and the results in Table 1, it can be found that:

[0109] Combining Examples 1-3 with Comparative Examples 1-2 demonstrates that the present invention utilizes a material formed by entanglement of a foam metal matrix and ultra-high molecular weight polyethylene fibers as the primary reinforcing agent. The foam metal matrix provides excellent strength and rigidity, effectively enhancing the mechanical properties of the rubber. The ultra-high molecular weight polyethylene fibers possess excellent tensile strength and abrasion resistance, significantly improving the durability and service life of the rubber. This combination significantly enhances the load-bearing capacity and impact resistance of the rubber while maintaining its flexibility, effectively reinforcing the mechanical properties of the rubber material.

[0110] Comparing Examples 4-6 with Examples 1-3 further illustrates that this application introduces an impact-modified material, using silicone rubber elastomer particles to fill a foam metal matrix. The design of this composite material significantly enhances the impact resistance of the rubber, especially when subjected to instantaneous impact. Silicone rubber has excellent elasticity and high-temperature resistance, and can maintain its physical properties in extreme environments. In addition, the filling of silicone rubber particles helps improve the material's affinity and compatibility, enhancing the bonding between the filler and the rubber matrix, thereby further improving the overall performance and application range of the final product.

[0111] The present invention has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present invention. Those skilled in the art will appreciate that various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present invention without departing from the spirit and scope of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0112] All publications, patent applications, patents, and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings conventionally understood by those skilled in the art. In the event of conflict, the definitions in this specification shall prevail.

[0113] When this specification uses the prefix "well known to those skilled in the art", "prior art" or similar terms to introduce materials, substances, methods, steps, devices or components, the objects introduced by the prefix include those commonly used in the art when this application is filed, but also include those that are not commonly used at present but will become generally recognized in the art to be suitable for similar purposes.

[0114] In the context of this specification, any matters or items not mentioned are directly applicable to those known in the art without any changes except those explicitly stated.

Claims

1. A rubber reinforcing agent, characterized in that: The invention comprises a foam metal matrix and ultra-high molecular weight polyethylene fibers entangled with the foam metal matrix.

2. A rubber reinforcing agent according to claim 1, characterized in that, The porosity of the foam metal matrix is ​​60-70%, and the yield strength is 28.5-36.5 MPa.

3. A rubber reinforcing agent according to claim 1, characterized in that: The foam metal matrix includes any one of a foam nickel matrix, a foam iron nickel matrix or a foam magnesium matrix.

4. A rubber reinforcing agent according to claim 1, characterized in that, The foam metal matrix is ​​further filled with an impact-resistant modification material, which is silicone rubber elastomer particles.

5. The method for preparing a rubber reinforcing agent according to any one of claims 1 to 4, characterized in that: The method comprises the following preparation steps: The foam metal substrate was placed at room temperature and ultrasonically cleaned with ethanol and acetone respectively. After cleaning, it was dried and set aside. Place ultra-high molecular weight polyethylene fiber in silicone rubber solution, stir and mix, and ultrasonically disperse, and collect the dispersed slurry; After the dispersed slurry is taken and subjected to vacuum degassing treatment, the cleaned foam metal substrate is immersed in the dispersed slurry, vacuum impregnated and cured at room temperature, and then crushed to prepare a rubber reinforcing agent.

6. The method for preparing a rubber reinforcing agent according to claim 5, characterized in that: The silicone rubber solution is prepared by mixing room temperature vulcanized silicone rubber and acetone in a mass ratio of 1:5-8.

7. The method for preparing a rubber reinforcing agent according to claim 5, characterized in that: The foam metal substrate is a surface-treated foam metal substrate, and the surface treatment includes the following steps: The surface treatment step is completed by placing the foam metal substrate in a micro-arc oxidation device, adding an electrolyte and performing micro-arc oxidation treatment.

8. The method for preparing a rubber reinforcing agent according to claim 7, characterized in that: The electrolyte comprises the following substances in parts by weight: NaAlO2 8-15 parts; KF 3-5 servings; NaOH 0.5-1.5 parts.

9. A high-strength rubber, characterized in that: The invention comprises the rubber reinforcing agent according to claims 1 to 8.