High-strength and high-wear-resistance transparent rubber material for shoe soles and preparation method of high-strength and high-wear-resistance transparent rubber material

Abstract

The invention relates to a high-strength and high-wear-resistance transparent rubber material for soles and a preparation method of the high-strength and high-wear-resistance transparent rubber material. The rubber material is prepared from the following raw materials in parts by weight: 100 parts of polyurethane rubber, 0.5-2 parts of stearic acid, 0.5-2 parts of a flow promoter, 0.5-2 parts of a phosphite antioxidant, 0.5-2 parts of a light stabilizer, 1-3 parts of an anti-aging agent, 0.1-0.5 part of an ultraviolet light absorber, 25-60 parts of anhydrous white carbon black, 2-6 parts of a plasticizer, 1-5 parts of a wear-resistant agent, 0.5-1 part of a bridging aid and 0.3-1 part of a bridging agent. Compared with the existing product, the rubber material for the sole of the sports shoe has the advantages of high transparency effect, excellent heat-resistant stability and wear resistance, qualitative leap in tensile strength and tear strength, and outstanding performance when the rubber material is used as the sole of the sports shoe for high-strength sports.

Description

Technical Field

[0001] This invention relates to the field of rubber materials technology, and in particular to a high-strength, high-wear-resistant transparent rubber material for shoe soles and its preparation method. Background Technology

[0002] Professional athletic shoes, due to their specific purpose, require highly transparent rubber soles. Simultaneously, they must possess excellent heat resistance, strength, and fatigue abrasion resistance to withstand high-intensity athletic activities. Currently, the transparent rubber used in the soles of these athletic shoes is primarily composed of butadiene rubber and solvent-based styrene-butadiene rubber copolymer elastomers. This rubber material is highly unstable during manufacturing, and while it exhibits good transparency, it performs poorly in terms of heat resistance, tensile and tear strength, and abrasion resistance. In actual use, it easily wears down and deforms under high-intensity exercise, losing its elasticity. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-strength, high-wear-resistant transparent rubber material for shoe soles and its preparation method, so as to overcome the defects and shortcomings of the prior art and products as described in the background art.

[0004] The technical solution adopted by this invention to solve its technical problem is: a high-strength, high-wear-resistant transparent rubber material for shoe soles, the raw materials for which are prepared by weight include: 100 parts of polyurethane rubber Stearic acid 0.5-2 parts Flow aid 0.5-2 parts Phosphite antioxidants: 0.5–2 parts Light stabilizer 0.5 to 2 parts Anti-aging agent 1-3 parts 0.1 to 0.5 parts of ultraviolet absorber 25-60 parts of anhydrous silica 2-6 parts plasticizer 1-5 parts of wear-resistant agent Bridging agent 0.5-1 part 0.3 to 1 part of crosslinking agent.

[0005] Preferably, the flow aid is a phthalate.

[0006] Preferably, the light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate.

[0007] Preferably, the antioxidant is 2,6-di-tert-butyl-p-cresol.

[0008] Preferably, the ultraviolet absorber is 2-(2-hydroxy-5-methylphenyl)benzotriazole.

[0009] Preferably, the plasticizer is di(2-butoxyethyl) adipate.

[0010] Preferably, the wear-resistant agent is Si-69.

[0011] Preferably, the bridging agent is trimethylolpropane triacrylate or ethylene glycol diacrylate.

[0012] Preferably, the crosslinking agent is dicumyl peroxide.

[0013] A method for preparing a high-strength, high-abrasion-resistant transparent rubber material for shoe soles as described above includes the following preparation steps: a. Weigh the raw materials for preparation according to the stated weight proportions; b. Put all raw materials except crosslinking agent into an internal mixer for mixing. Set the mixing temperature to 120℃~130℃ and the time to 7min~9min. After mixing, discharge the material and allow the rubber compound to cool naturally to below 55℃. c. Add the crosslinking agent and the cooled rubber compound into a two-roll mill for mixing. Set the mixing temperature to 50℃~70℃ and the time to 4min~6min. After mixing, the rubber compound is discharged in flakes to obtain the finished product.

[0014] The beneficial effects of the present invention are as follows: Compared with existing products, the rubber material for the sole of sports shoes of the present invention not only has the same high transparency, but also has excellent heat resistance and wear resistance. At the same time, its tensile strength and tear strength have made a qualitative leap, and its performance as a sole of sports shoes is outstanding when facing high-intensity sports. Detailed Implementation

[0015] The present invention will be further described below through several embodiments. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] Example 1 a. Weigh the raw materials: 2200g polyurethane rubber, 18g stearic acid, 22g phthalate, 11g phosphite antioxidant, 11g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 26g 2,6-di-tert-butyl-p-cresol, 3g 2-(2-hydroxy-5-methylphenyl)benzotriazole, 700g anhydrous silica, 66g di(2-butoxyethyl) adipate, 22g Si-69, 15g trimethylolpropane triacrylate (TMPTA), and 11g dicumyl peroxide; b. Put all raw materials except crosslinking agent into an internal mixer for mixing. Set the mixing temperature to 120℃~130℃ and the time to 7 minutes. After mixing, discharge the material and let the rubber compound cool naturally to below 55℃. c. Add the crosslinking agent and the cooled rubber compound into the open mill for mixing. Set the mixing temperature to 50℃~60℃ and the time to 4 minutes. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0017] Example 2 a. Weigh the raw materials: 27000g polyurethane rubber, 320g stearic acid, 220g phthalate, 270g phosphite antioxidant, 270g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 400g 2,6-di-tert-butyl-p-cresol, 80g 2-(2-hydroxy-5-methylphenyl)benzotriazole, 9500g anhydrous silica, 1400g di(2-butoxyethyl) adipic acid, 540g Si-69, 216g trimethylolpropane triacrylate (TMPTA), and 190g dicumyl peroxide; b. Put all raw materials except crosslinking agent into an internal mixer for mixing. Set the mixing temperature to 120℃~130℃ and the time to 8 minutes. After mixing, discharge the material and let the rubber compound cool naturally to below 55℃. c. Add the crosslinking agent and the cooled rubber compound into a two-roll mill for mixing. Set the mixing temperature to 50℃~60℃ and the time to 5 minutes. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0018] Example 3 a. Weigh the raw materials: 40,000g polyurethane rubber, 600g stearic acid, 400g phthalate, 320g phosphite antioxidant, 280g bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, 600g 2,6-di-tert-butyl-p-cresol, 120g 2-(2-hydroxy-5-methylphenyl)benzotriazole, 15,000g anhydrous silica, 2,000g di(2-butoxyethyl) adipate, 800g Si-69, 320g ethylene glycol diacrylate (EGDA), and 320g dicumyl peroxide; b. Put all raw materials except crosslinking agent into an internal mixer for mixing. Set the mixing temperature to 120℃~130℃ and the time to 9 minutes. After mixing, discharge the material and let the rubber compound cool naturally to below 55℃. c. Add the crosslinking agent and the cooled rubber compound into a two-roll mill for mixing. Set the mixing temperature to 60℃~70℃ and the time to 6 minutes. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0019] Stearic acid, during the intensive mixing process of rubber compounds, ensures complete dispersion of other components in the compound formulation, thus preventing the compound from easily adhering to the inner wall of the mixer during mixing and the problem of film sticking during compression molding. It also lowers the foaming decomposition temperature. Flow aids reduce friction between the compound and processing equipment, as well as between molecules within the compound, preventing resin degradation due to excessive frictional heat. They also shorten mixing time and facilitate demolding. Phosphite antioxidants effectively prevent polymer deterioration caused by oxidation. Light stabilizers inhibit polymer photoaging by shielding and absorbing ultraviolet light, quenching excited-state energy, and capturing and decomposing free radicals, ensuring good light stability and extending product lifespan. Anti-aging agents effectively improve the product's aging resistance. Ultraviolet absorbers effectively prevent damage from ultraviolet light, significantly improving the product's anti-aging performance. Furthermore, ultraviolet absorbers contribute to the product's longevity. It possesses effective antioxidant and anti-yellowing properties, and its effect is even better when used in conjunction with antioxidants; silica can improve the flexural resistance of rubber materials, giving them good flexural fatigue resistance. Simultaneously, silica has super-strong adhesion, enabling the formed rubber material to have excellent tear resistance, heat resistance, and anti-aging properties; plasticizers are used to enhance the flexibility of rubber materials; abrasion-resistant agents are used to improve the abrasion resistance and scratch resistance of rubber materials; crosslinking agents are compounds with reactive groups that can react with the matrix polymer in the crosslinking agent and enter the structure to form a network or crosslinked structure, effectively reducing the amount of crosslinking agent required; crosslinking agents can cause rubber molecular chains to undergo crosslinking reactions, forming linear molecules into a three-dimensional network structure. This process can significantly enhance the elasticity, strength, and deformation resistance of rubber materials, enabling them to withstand greater tensile, compressive, and tear strengths, and maintain shape stability in high-temperature and solvent environments. At the same time, it reduces the plasticity of the material, making it more durable and less prone to deformation.

[0020] The performance of the rubber materials prepared by Examples 1, 2 and 3 was tested and compared with existing products. The test data are recorded as follows (Table 1).

[0021] Table 1 Continued from Table 1 As can be seen from the data in the table above, the rubber material prepared by this invention has excellent tensile strength (in terms of "breaking strength", "elongation at break" and "ozone tensile strength"), tear strength (in terms of "90-degree tear force") and wear resistance (in terms of "Akron abrasion" and "Din abrasion resistance"), which is far superior to existing products. It also has excellent anti-yellowing and anti-aging properties.

[0022] The above embodiments are only used to explain the present invention and are not intended to limit the protection of the present invention. Any non-substantial modifications made based on the essential solution of the present invention should fall within the protection scope of the present invention.

Claims

1. A high-strength, highly wear-resistant transparent rubber material for shoe soles, characterized in that: Its raw materials, by weight, include: 100 parts of polyurethane rubber Stearic acid 0.5-2 parts Flow aid 0.5-2 parts Phosphite antioxidants: 0.5–2 parts Light stabilizer 0.5 to 2 parts Anti-aging agent 1-3 parts 0.1 to 0.5 parts of ultraviolet absorber 25-60 parts of anhydrous silica 2-6 parts plasticizer 1-5 parts of wear-resistant agent Bridging agent 0.5-1 part 0.3 to 1 part of crosslinking agent.

2. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The flow aid is a phthalate ester.

3. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The light stabilizer is bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate.

4. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The antioxidant is 2,6-di-tert-butyl-p-cresol.

5. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The ultraviolet absorber is 2-(2-hydroxy-5-methylphenyl)benzotriazole.

6. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The plasticizer is di(2-butoxyethyl) adipate.

7. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The wear-resistant agent mentioned is Si-69.

8. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The bridging agent is trimethylolpropane triacrylate or ethylene glycol diacrylate.

9. The high-strength, high-wear-resistant transparent rubber material for shoe soles according to claim 1, characterized in that: The bridging agent is dicumyl peroxide.

10. A method for preparing a high-strength, high-wear-resistant transparent rubber material for shoe soles as described in any one of claims 1 to 9, characterized in that: The preparation steps include the following: a. Weigh the raw materials for preparation according to the stated weight proportions; b. Put all raw materials except crosslinking agent into an internal mixer for mixing. Set the mixing temperature to 120℃~130℃ and the time to 7min~9min. After mixing, discharge the material and allow the rubber compound to cool naturally to below 55℃. c. Add the crosslinking agent and the cooled rubber compound into a two-roll mill for mixing. Set the mixing temperature to 50℃~70℃ and the time to 4min~6min. After mixing, the rubber compound is discharged in flakes to obtain the finished product.

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