Anti-collision rubber sole and preparation method thereof

Abstract

The invention relates to the technical field of sole manufacturing, and discloses an anti-collision rubber sole and a preparation method thereof.The preparation method comprises the steps that raw materials are prepared in proportion, the raw materials are subjected to high-speed mixing at the temperature of 60-80 DEG C to obtain a composite rubber material, sulfur and a vulcanization accelerator are added at the temperature of 100-120 DEG C for secondary mixing, mixing is uniform, the rubber material is cut into a preset size, and the anti-collision rubber sole is obtained. Placing the mixture in a mold for hot-pressing vulcanization to obtain the anti-collision rubber sole. The anti-collision performance, the wear resistance, the elasticity and the durability of the rubber sole can be improved, and meanwhile environmental protection and industrial applicability are considered.

Description

Technical Field

[0001] This invention relates to the field of shoe sole manufacturing technology, and more specifically, to an anti-collision rubber shoe sole and its preparation method. Background Technology

[0002] As people's living standards improve, the demands for comfort, safety, and durability in footwear products are increasing. This is especially true in the fields of athletic and work shoes, where the impact resistance and abrasion resistance of the soles have become key indicators. However, existing rubber soles mostly use traditional synthetic rubber materials, which suffer from insufficient cushioning, poor abrasion resistance, and limited environmental adaptability. Furthermore, uneven dispersion of fillers and insufficient interfacial bonding in sole materials lead to decreased mechanical properties and durability, making it difficult to meet the demands of high-intensity use. Existing functional filler modification technologies are often complex processes with low catalytic activity, hindering the improvement of material performance. At the same time, the selection of energy-absorbing materials and the control of composite processes are still imperfect, limiting the optimization of the overall performance of the soles.

[0003] Therefore, there is an urgent need to develop a rubber sole manufacturing technology that combines high strength, high elasticity, and excellent impact resistance to improve the durability and safety performance of soles and meet the diverse needs of the modern footwear market. Summary of the Invention

[0004] In view of this, the present invention proposes an anti-collision rubber shoe sole and its preparation method, aiming to solve the problems of insufficient cushioning performance, poor wear resistance, uneven filler dispersion and insufficient interfacial bonding force of existing rubber shoe soles in the current technology.

[0005] On one hand, the present invention proposes a method for preparing an anti-collision rubber shoe sole, comprising:

[0006] S1: Raw materials to be prepared by weight: 20-35 parts functionalized nano-silica powder, 25-40 parts bio-based polyurethane elastomer, 15-30 parts hydrogenated nitrile rubber, 5-10 parts modified titanium dioxide, 4-7 parts modified bentonite, 2.5-5 parts toughening agent, 3-7 parts energy absorption aid, 1.8-2.8 parts vulcanization accelerator, 2.0-3.5 parts sulfur, 0.3-0.7 parts antioxidant, 0.3-0.7 parts anti-aging agent, 4.0-7.5 parts softener and 0.2-0.5 parts stabilizer;

[0007] The functionalized nano-silica powder is treated with 3-aminopropyltriethoxysilane coupling agent, with an average particle size of 60-90 nm and a surface modification degree of 1.5-3.0 wt%.

[0008] The bio-based polyurethane elastomer is synthesized by reacting plant oil-derived polyols with isocyanates, and has a tensile strength of 15-25 MPa, an elongation at break of 300-450%, and a hardness of 60-70 Shore A.

[0009] S2: Mix the raw materials at high speed at 60-80℃ for 8-15 minutes to obtain a composite rubber compound;

[0010] S3: Mix the compound rubber at 100-120℃ for a second time, add sulfur and vulcanization accelerator, and continue mixing for 5-10 minutes until uniform;

[0011] S4: Cut the rubber compound mixed in step S3 into a predetermined size, put it into a mold, and perform hot-press vulcanization to obtain an anti-collision rubber sole.

[0012] Furthermore, the modified titanium dioxide is treated with a surface photocatalytic modification process, with a particle size of 20-50 nm and a catalytic activity index ≥0.85;

[0013] The surface photocatalytic modification process includes:

[0014] Nano-sized titanium dioxide powder with a particle size of 20-50 nm was placed in deionized water at a solid-liquid ratio of 1:50; 0.5 wt% sodium dodecylbenzenesulfonate was added as a surfactant; and the suspension was obtained by ultrasonic vibration for 30 min.

[0015] The suspension was mixed with a 0.1 mol / L copper nitrate solution at a volume ratio of 9:1 and stirred continuously for 30 minutes to obtain a mixed solution.

[0016] The mixed solution was placed in a low-temperature plasma reaction chamber, and oxygen and nitrogen in a volume ratio of 1:3 were introduced. The total flow rate was maintained at 100 sccm, the radio frequency plasma was turned on, the power was set to 100W, and the reaction time was 20 minutes to obtain wet powder.

[0017] The wet powder was transferred to the photocatalytic reaction chamber and irradiated under a 365nm wavelength ultraviolet lamp for 4 hours;

[0018] The precursor powder was repeatedly filtered and washed three times with deionized water to remove insoluble impurities. Then, the wet powder was dried in a vacuum drying oven at 60°C for 12 hours to obtain the precursor powder.

[0019] The precursor powder was placed in a tube furnace and slowly heated to 350°C under a nitrogen atmosphere, and held for 2 hours to obtain modified titanium dioxide.

[0020] Furthermore, the modified bentonite is polyacrylamide-modified bentonite.

[0021] Furthermore, the toughening agent is a styrene-butadiene copolymer with a Mooney viscosity of ML1+4@100℃ of 43-57.

[0022] Furthermore, the energy absorption aid is thermoplastic polyurethane foam microspheres with a particle size range of 50-120 μm;

[0023] The thermoplastic polyurethane foam microspheres are prepared by the following method:

[0024] TPU particles were added to NMP solvent to prepare a TPU solution with a concentration of 10-15 wt%.

[0025] Add physical foaming agent HFC-245fa to the TPU solution at 5-15% of the TPU solution weight;

[0026] Add 0.5-1% dispersant and stir continuously at 20°C to obtain a foamed TPU solution;

[0027] The foamed TPU solution is sprayed into tiny droplets using a spray drying device. The nozzle temperature of the spray dryer is set at 150-180℃, and the hot air temperature is 200℃. The spray droplets dry and expand in the hot air to form porous foam microspheres. The porous foam microspheres are then sieved to obtain thermoplastic polyurethane foam microspheres.

[0028] Furthermore, the vulcanization accelerator comprises 2-mercaptobenzothiazole, dithiocarbamate, and thiuram-based accelerators, with the accelerator mass ratio being 1:0.7:0.3.

[0029] Furthermore, the sulfur content is ≥70wt%, and the oil content is controlled at 18-22%;

[0030] During hot-press vulcanization, the vulcanization temperature is controlled at 165-175℃ and the vulcanization time is 230-270 seconds.

[0031] Furthermore, the softener is a mixture of paraffin oil and naphthenic oil in a ratio of 6:4, with a softening point of 45-55℃.

[0032] Furthermore, the stabilizer is a phenolic polymerization inhibitor.

[0033] On the other hand, the present invention also proposes an anti-collision rubber sole prepared by the above method.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] Functionalized nano-silica powder is used as the main filler. Its fine particle size and surface functionalization enhance the interfacial bonding between the filler and the rubber matrix, effectively dispersing stress and improving the sole's energy absorption capacity against external impacts. Simultaneously, the high elasticity and tensile strength of the bio-based polyurethane elastomer provide the sole with better cushioning and rebound performance when subjected to impact, significantly reducing the risk of foot injuries.

[0036] The synergistic effect of modified titanium dioxide and modified bentonite enhances the mechanical strength and abrasion resistance of the shoe sole material. Photocatalytic modification of titanium dioxide increases its surface activity, promoting interfacial bonding with the rubber matrix, improving structural stability, and slowing down the wear process. Polyacrylamide-modified bentonite improves the filler dispersion uniformity of the material, prevents stress concentration, and further enhances durability.

[0037] Bio-based polyurethane elastomers offer excellent elasticity and elongation at break, enhancing the comfort and adaptability of shoe soles. Styrene-butadiene copolymers, acting as toughening agents, effectively improve the material's toughness, reducing the likelihood of cracks and fatigue failure during use and extending the sole's lifespan.

[0038] Thermoplastic polyurethane foam microspheres are used as energy absorption aids. These microspheres have a porous structure and excellent elasticity, allowing them to deform and absorb energy under impact loads, thus enhancing the overall cushioning performance of the shoe sole. The microspheres are prepared using a spray-drying process to ensure uniform particle size and distribution, which contributes to the stability and reliability of the material's mechanical properties.

[0039] The bio-based polyurethane elastomer used in this invention is synthesized from plant oil-derived polyols, which is environmentally friendly and sustainable, reducing reliance on traditional petrochemical resources. The mixing and hot-pressing vulcanization processes have been optimized and controlled in terms of temperature and time, resulting in a stable process that is easy to scale up for industrial production, thus reducing energy consumption and production costs.

[0040] By rationally combining antioxidants, anti-aging agents, and stabilizers (phenolic polymerization inhibitors), the stability of the sole material is enhanced in high temperature, light, and oxidative environments, effectively extending the service life and performance maintenance of the sole.

[0041] The nanofiller undergoes surface modification treatment and is combined with advanced mixing process to ensure that the filler is uniformly dispersed in the rubber matrix, reducing internal defects and stress concentration in the material, improving mechanical strength and durability, and preventing material brittleness and peeling. Attached Figure Description

[0042] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0043] Figure 1 This is a top view of an anti-collision rubber shoe sole and its manufacturing method provided in an embodiment of the present invention.

[0044] Figure 2 A side view of a collision-resistant rubber sole and its preparation method provided in an embodiment of the present invention.

[0045] Figure 3 The image shows a bottom view of an anti-collision rubber sole and its manufacturing method provided in an embodiment of the present invention.

[0046] In the picture, 10 is the sole; 11 is the anti-collision pad; and 12 is the raised pattern. Detailed Implementation

[0047] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] The structure of the anti-collision rubber sole provided in this embodiment of the invention is described in reference to... Figure 1-3 As shown. The user's foot must rest on the sole 10. An anti-collision pad 11 is provided at the edge of the sole 10, positioned perpendicular to the sole 10. The top of the anti-collision pad 11 approaches the center of the sole 10 to conform to the user's foot, reducing the risk of the user slipping off the sole 10. The anti-collision pad 11 protects the sides of the user's foot. Patterned protrusions 12 are located at the bottom of the sole 10. These protrusions have varying shapes and are unevenly distributed across the sole 10, increasing friction in all directions.

[0049] The method for preparing the anti-collision rubber shoe sole according to an embodiment of the present invention is as follows:

[0050] Prepare the following ingredients according to the following parts by weight:

[0051] 20-35 parts of functionalized nano-silica powder (the nano-silica powder is treated with 3-aminopropyltriethoxysilane coupling agent, with an average particle size of 60-90 nm and a surface modification degree of 1.5-3.0 wt%).

[0052] 25-40 parts of bio-based polyurethane elastomer (synthesized by the reaction of vegetable oil-derived polyols and isocyanates, with tensile strength of 15-25 MPa, elongation at break of 300-450%, and hardness of 60-70 Shore A).

[0053] 15-30 parts of hydrogenated nitrile butadiene rubber;

[0054] 5-10 parts of modified titanium dioxide (treated by surface photocatalytic modification process, particle size 20-50nm, catalytic activity index ≥0.85);

[0055] 4-7 parts of polyacrylamide-modified bentonite;

[0056] Toughening agent 2.5-5 parts (styrene-butadiene copolymer, Mooney viscosity ML1+4@100℃ is 43-57);

[0057] 3-7 parts of energy absorption aid (thermoplastic polyurethane foam microspheres, particle size 50-120μm, specific preparation method is described later);

[0058] 1.8-2.8 parts of vulcanization accelerator (composed of 2-mercaptobenzothiazole, dithiocarbamate and thiuram-based accelerators in a mass ratio of 1:0.7:0.3);

[0059] Sulfur 2.0-3.5 parts (sulfur content ≥70wt%, oil content 18-22%);

[0060] Antioxidant 0.3-0.7 parts; Anti-aging agent 0.3-0.7 parts; Softener 4.0-7.5 parts (mixture of paraffin oil and naphthenic oil, ratio 6:4, softening point 45-55℃); Stabilizer 0.2-0.5 parts (phenolic polymerization inhibitor).

[0061] Preparation process of modified titanium dioxide: 20-50nm nano-titanium dioxide powder was placed in deionized water (solid-liquid ratio 1:50), and 0.5wt% sodium dodecylbenzenesulfonate surfactant was added. The mixture was ultrasonically vibrated for 30 minutes to obtain a suspension. The suspension was mixed with 0.1mol / L copper nitrate solution at a volume ratio of 9:1 and stirred for 30 minutes. The mixture was placed in a low-temperature plasma reaction chamber, and oxygen and nitrogen (volume ratio 1:3, total flow rate 100sccm) were introduced. The radio frequency plasma power was 100W, and the reaction was carried out for 20 minutes to obtain wet powder. The wet powder was transferred to a photocatalytic reaction chamber and irradiated with a 365nm ultraviolet lamp for 4 hours. The mixture was filtered three times with deionized water to remove impurities. The wet powder was vacuum dried at 60℃ for 12 hours to obtain precursor powder. Finally, the mixture was slowly heated to 350℃ in a nitrogen atmosphere tube furnace and held for 2 hours to obtain modified titanium dioxide.

[0062] Preparation method of thermoplastic polyurethane foam microspheres:

[0063] TPU particles were added to NMP solvent to prepare a 10-15 wt% TPU solution; physical foaming agent HFC-245fa was added at 5-15% by weight of the TPU solution; 0.5-1% dispersant was added and the mixture was stirred at 20°C; the foamed TPU solution was spray-dried into porous foam microspheres using a spray drying device with a nozzle temperature of 150-180°C and a hot air temperature of 200°C, and the resulting thermoplastic polyurethane foam microspheres with a particle size of 50-120 μm were obtained by screening.

[0064] Preparation of compound rubber by mixing:

[0065] The above-prepared raw materials are mixed at high speed at 70°C for 8-15 minutes to obtain a uniform composite rubber compound.

[0066] Add vulcanizing agent during secondary mixing:

[0067] Place the compound from step 3 into a mixer, add sulfur and vulcanization accelerator at 110°C, and continue mixing for 5-10 minutes to ensure uniform component distribution.

[0068] Cutting and hot-press vulcanization molding:

[0069] The uniformly mixed rubber compound is cut into predetermined sizes, placed in a mold, and subjected to hot-press vulcanization. The vulcanization conditions are 170℃ for 250 seconds to obtain impact-resistant rubber shoe soles.

[0070] The samples were prepared according to the above method and the amounts added as shown in Table 1, resulting in Examples 1-5. Performance tests were performed on Examples 1-5, and the results are shown in Table 2. The stabilizer was Irganox 1076, the antioxidant was N-isopropyl-N′-phenyl-p-phenylenediamine, and the antioxidant was pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenylpropionic acid)] ester.

[0071] Table 1

[0072]

[0073]

[0074] Table 2

[0075]

[0076]

[0077] The following conclusions can be drawn from the table:

[0078] 1. Tensile Strength: Example 3 exhibited the highest tensile strength, reaching 25.0 MPa, significantly superior to the other examples. This example had a high content of bio-based polyurethane elastomer and used the finest nano-silicone (50 nm) particles, which facilitated the uniform dispersion of nanofillers and enhanced the matrix structure, thereby improving the overall strength of the rubber. Example 4 had the lowest strength (16.5 MPa), possibly due to the larger particle size and lower content of the modified nano-silicone, resulting in insufficient reinforcing effect. Examples 1 and 5 also performed well, reaching 20.1 MPa and 22.1 MPa respectively, indicating that the optimized formulation and functionalized additives had a positive effect on mechanical properties.

[0079] 2. Elongation at break: Example 3 also showed the best performance in terms of elongation at break, reaching 452%, demonstrating the excellent elasticity and ductility of this rubber formulation. Example 4 had the lowest (312%), indicating insufficient elasticity. Overall, elongation at break is positively correlated with tensile strength; excellent tensile properties are usually accompanied by high elongation at break, making it suitable for shoe soles that require large deformation and are not prone to breakage.

[0080] 3. Hardness: Hardness test results show that Example 3 has the highest hardness (70 Shore A), while Example 4 has the lowest (61 Shore A). Higher hardness indicates that the rubber material is more rigid and abrasion-resistant, while lower hardness improves comfort and softness. The hardness variation range of each example is reasonable and can meet the sole design needs of different uses.

[0081] 4. Abrasion resistance: Abrasion resistance is expressed as volume loss (mm). 3 The lower the value, the better. Example 3 showed the best abrasion resistance (110mm). 3 The combination of its high strength and high hardness indicates that the fine-particle-size nano-silica gel and bentonite-modified additives in the formulation effectively enhance the wear resistance of the rubber. Example 4 showed the worst wear resistance (140mm). 3 This corresponds to its lower hardness and the content of reinforcing fillers.

[0082] 5. Aging Resistance: After aging at 100℃ for 72 hours, the hardness changes in all examples were between +1 and +3, indicating that the addition of antioxidants and anti-aging agents in the formula was reasonable, the material had good thermal stability, and could ensure the stable performance of the sole under long-term high-temperature environment. Example 3 showed the smallest hardness change (+1), further demonstrating the superior comprehensive performance of its formula.

[0083] 6. Impact Resistance: Example 3 showed the highest impact energy absorption (13.8 J), demonstrating its significant advantages in shock absorption and damping, making it suitable for shoe soles with high cushioning requirements. Example 4 showed the lowest (10.2 J), possibly related to its lower content of additives and foamed microspheres. Overall, impact resistance is closely related to the optimized ratio of energy-absorbing additives.

[0084] 7. Coefficient of Friction: Example 3 has the highest coefficient of friction (0.78), which is beneficial for improving the anti-slip performance of the sole. Example 4 has the lowest coefficient of friction (0.70), and its anti-slip performance is relatively weaker. Improved friction performance contributes to the safety of the sole under wet or complex road conditions.

[0085] 8. Density: The density of each embodiment was maintained at 1.12-1.20 g / cm³. 3 The values ​​are within a suitable range. Example 3 showed the lowest density (1.12 g / cm³). 3 By combining its foaming agent and nanofiller in an optimized ratio, it meets the requirements for lightweight and high-performance shoe sole materials.

[0086] In summary, Example 3 exhibits the best performance across all key performance indicators, particularly superior to other examples in tensile strength, elongation at break, abrasion resistance, impact resistance, and coefficient of friction. This demonstrates the synergistic effect of the fine and moderate content of the nano-silica particles combined with the high content of bio-based polyurethane elastomer. Example 4 shows weaker overall performance, indicating that adjusting the particle size and content of the nanofiller significantly impacts performance. Examples 1, 2, and 5 demonstrate moderate performance, suitable for balancing strength, flexibility, and abrasion resistance according to specific needs.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing an anti-collision rubber shoe sole, characterized in that, Includes the following steps: S1: Raw materials to be prepared by weight: 20-35 parts functionalized nano-silica powder, 25-40 parts bio-based polyurethane elastomer, 15-30 parts hydrogenated nitrile rubber, 5-10 parts modified titanium dioxide, 4-7 parts modified bentonite, 2.5-5 parts toughening agent, 3-7 parts energy absorption aid, 1.8-2.8 parts vulcanization accelerator, 2.0-3.5 parts sulfur, 0.3-0.7 parts antioxidant, 0.3-0.7 parts anti-aging agent, 4.0-7.5 parts softener and 0.2-0.5 parts stabilizer; The functionalized nano-silica powder is treated with 3-aminopropyltriethoxysilane coupling agent, with an average particle size of 60-90 nm and a surface modification degree of 1.5-3.0 wt%. The bio-based polyurethane elastomer is synthesized by reacting plant oil-derived polyols with isocyanates, and has a tensile strength of 15-25 MPa, an elongation at break of 300-450%, and a hardness of 60-70 Shore A. S2: Mix the raw materials at high speed at 60-80℃ for 8-15 minutes to obtain a composite rubber compound; S3: Mix the compound rubber at 100-120℃ for a second time, add sulfur and vulcanization accelerator, and continue mixing for 5-10 minutes until uniform; S4: Cut the rubber compound mixed in step S3 into a predetermined size, put it into a mold, and perform hot-press vulcanization to obtain an anti-collision rubber sole.

2. The preparation method according to claim 1, characterized in that, The modified titanium dioxide is treated with a surface photocatalytic modification process, with a particle size of 20-50 nm and a catalytic activity index ≥0.85; The surface photocatalytic modification process includes: Nano-sized titanium dioxide powder with a particle size of 20-50 nm was placed in deionized water at a solid-liquid ratio of 1:50; 0.5 wt% sodium dodecylbenzenesulfonate was added as a surfactant; and the suspension was obtained by ultrasonic vibration for 30 min. The suspension was mixed with a 0.1 mol / L copper nitrate solution at a volume ratio of 9:1 and stirred continuously for 30 minutes to obtain a mixed solution. The mixed solution was placed in a low-temperature plasma reaction chamber, and oxygen and nitrogen in a volume ratio of 1:3 were introduced. The total flow rate was maintained at 100 sccm, the radio frequency plasma was turned on, the power was set to 100W, and the reaction time was 20 minutes to obtain wet powder. The wet powder was transferred to the photocatalytic reaction chamber and irradiated under a 365nm wavelength ultraviolet lamp for 4 hours; The precursor powder was repeatedly filtered and washed three times with deionized water to remove insoluble impurities. Then, the wet powder was dried in a vacuum drying oven at 60°C for 12 hours to obtain the precursor powder. The precursor powder was placed in a tube furnace and slowly heated to 350°C under a nitrogen atmosphere, and held for 2 hours to obtain modified titanium dioxide.

3. The preparation method according to claim 1, characterized in that, The modified bentonite is polyacrylamide-modified bentonite.

4. The preparation method according to claim 1, characterized in that, The toughening agent is a styrene-butadiene copolymer with a Mooney viscosity of ML1+4@100℃ of 43-57.

5. The preparation method according to claim 1, characterized in that, The energy absorption aid is thermoplastic polyurethane foam microspheres with a particle size range of 50-120 μm; The thermoplastic polyurethane foam microspheres are prepared by the following method: TPU particles were added to NMP solvent to prepare a TPU solution with a concentration of 10-15 wt%. Add physical foaming agent HFC-245fa to the TPU solution at 5-15% of the TPU solution weight; Add 0.5-1% dispersant and stir continuously at 20°C to obtain a foamed TPU solution; The foamed TPU solution is sprayed into tiny droplets using a spray drying device. The nozzle temperature of the spray dryer is set at 150-180℃, and the hot air temperature is 200℃. The spray droplets dry and expand in the hot air to form porous foam microspheres. The porous foam microspheres are then sieved to obtain thermoplastic polyurethane foam microspheres.

6. The preparation method according to claim 1, characterized in that, The vulcanization accelerator comprises 2-mercaptobenzothiazole, dithiocarbamate, and thiuram-based accelerators, with a mass ratio of 1:0.7:0.

3.

7. The preparation method according to claim 1, characterized in that, The sulfur content is ≥70wt%, and the oil content is controlled at 18-22%; During hot-press vulcanization, the vulcanization temperature is controlled at 165-175℃ and the vulcanization time is 230-270 seconds.

8. The preparation method according to claim 1, characterized in that, The softener is a mixture of paraffin oil and naphthenic oil in a 6:4 ratio, with a softening point of 45-55℃.

9. The preparation method according to claim 1, characterized in that, The stabilizer is a phenolic polymerization inhibitor.

10. An anti-collision rubber sole obtained by the preparation method according to any one of claims 1-9.

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