Cold-resistant and high-slip-resistance sneaker sole rubber material and preparation method thereof

Abstract

The invention relates to a cold-resistant and high-slip-resistance sneaker sole rubber material and a preparation method thereof. The rubber material is prepared from the following raw materials in parts by weight: 40-60 parts of butadiene rubber, 10-30 parts of isoprene rubber, 30-50 parts of brominated butyl rubber, 2-5 parts of polyethylene glycol, 0.5-1.5 parts of stearic acid, 4-6 parts of zinc oxide, 2-4 parts of a homogenizing agent, 0.5-1.5 parts of an active agent, 1-3 parts of an anti-aging agent, 1.5-2.2 parts of a vulcanizing agent, 1.2-2 parts of an accelerant, 40-65 parts of white carbon black, 4-8 parts of softening oil, 0.5-1 part of microcrystalline wax, 4-8 parts of a tackifier and 2-5 parts of a wear-resistant agent. Compared with the existing product, the sneaker sole rubber material disclosed by the invention has the advantages that the non-slip performance and the cold resistance are greatly improved, the non-slip performance and the cold resistance (namely, the capability of maintaining various performances in a low-temperature environment) are very excellent, and meanwhile, the sneaker sole rubber material also has good shock absorption performance and wear resistance.

Description

Technical Field

[0001] This invention relates to the field of rubber materials technology, and in particular to a cold-resistant, highly slip-resistant rubber material for sports shoe soles and its preparation method. Background Technology

[0002] Professional outdoor hiking shoes, due to their special purpose, require their sole rubber to have good shock absorption and abrasion resistance, as well as good slip resistance and low-temperature resistance. Currently, the rubber used in athletic shoe soles is mainly composed of butadiene rubber, nitrile rubber, and isobutylene-isoprene copolymer elastomers containing active bromine. This type of rubber is very unstable during the manufacturing process and tends to harden in cold conditions, resulting in insufficient slip resistance and shock absorption. Consequently, when used in low-temperature environments, the soles of athletic shoes tend to harden, become slippery, and experience a significant reduction in elasticity and shock absorption, while also leading to accelerated sole wear. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a cold-resistant and highly slip-resistant rubber material for sports 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 cold-resistant, highly slip-resistant rubber material for sports shoe soles, the raw materials for which are prepared by weight include: 40-60 parts of butadiene rubber 10-30 parts of isoprene rubber 30-50 parts of brominated butyl rubber 2-5 parts of polyethylene glycol Stearic acid 0.5–1.5 parts 4-6 parts zinc oxide 2-4 parts homogenizer Surfactant 0.5–1.5 parts Anti-aging agent 1-3 parts 1.5 to 2.2 parts of vulcanizing agent Accelerator 1.2 to 2 parts 40-65 parts of silica 4-8 parts softening oil 0.5 to 1 part microcrystalline wax 4-8 parts of tackifying resin 2-5 parts of wear-resistant agent.

[0005] Preferably, the butadiene rubber is rare earth butadiene rubber.

[0006] Preferably, the activator is a mixture of urea and fatty acids.

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

[0008] Preferably, the vulcanizing agent is sulfur.

[0009] Preferably, the accelerator is one or a mixture of several of the following: thiazole accelerators, thiuram accelerators, and dithiocarbamate accelerators.

[0010] Preferably, the softening oil is di(2-butoxyethyl) adipic acid.

[0011] Preferably, the tackifier is an aqueous tackifying resin.

[0012] Preferably, the wear-resistant agent is Si-69.

[0013] A method for preparing a cold-resistant, highly slip-resistant rubber material for sports 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 vulcanizing agent and accelerator into internal mixer for mixing. Set the mixing temperature to 120℃~135℃ and the time to 7min~9min. After mixing, discharge the material and let the rubber compound cool naturally to below 70℃. c. Put the vulcanizing agent, accelerator and cooled rubber compound into the open mill for mixing. The mixing temperature is set to 50℃~70℃ and the time is 5min~7min. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0014] The beneficial effects of the present invention are as follows: Compared with existing products, the anti-slip performance and cold resistance performance of the rubber material of the sports shoe sole of the present invention are greatly improved. Its anti-slip performance and cold resistance performance (i.e., the ability to maintain various properties in low temperature environment) are excellent, and it also has good shock absorption performance and wear resistance. 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

[0017] a. Weigh the raw materials: 1000g rare earth cis-butadiene rubber, 400g isoprene rubber, 600g brominated butyl rubber, 84g polyethylene glycol, 10g stearic acid, 100g zinc oxide, 50g homogenizer, 10g activator (made by mixing 5g urea and 5g fatty acid), 20g 2,6-di-tert-butyl-p-cresol, 30g sulfur, 42g accelerator (made by mixing 25g thiazole accelerator, 11g thiuram accelerator and 6g dithiocarbamate accelerator), 1000g silica, 80g di(2-butoxyethyl) adipic acid, 20g microcrystalline wax, 160g water-based tackifying resin, and 40g Si-69. b. Put all raw materials except sulfur and accelerator into an internal mixer for mixing. Set the mixing temperature to 120℃~125℃ and the time to 7min. After mixing, discharge the material and let the rubber compound cool naturally to below 70℃. c. Put the sulfur, accelerator and cooled rubber compound into a two-roll mill for mixing. The mixing temperature is set to 50℃~70℃ and the time is 5min. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0018] Example 2

[0019] a. Weigh the raw materials: 13000g rare earth butadiene rubber, 3900g isoprene rubber, 9100g brominated butyl rubber, 1300g polyethylene glycol, 130g stearic acid, 1300g zinc oxide, 650g homogenizer, 208g activator (made by mixing 100g urea and 108g fatty acid), 390g 2,6-di-tert-butyl-p-cresol, 468g sulfur, 520g accelerator (made by mixing 320g thiazole accelerator, 100g thiuram accelerator, and 100g dithiocarbamate accelerator), 13520g silica, 1040g di(2-butoxyethyl) adipic acid, 260g microcrystalline wax, 1300g water-based tackifying resin, and 1300g Si-69. b. Put all raw materials except sulfur and accelerator into the internal mixer for mixing. Set the mixing temperature to 125℃~130℃ and the time to 8min. After mixing, discharge the material and let the rubber compound cool naturally to below 70℃. c. Put the sulfur, accelerator and cooled rubber compound into a two-roll mill for mixing. The mixing temperature is set to 50℃~70℃ and the time is 6 minutes. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0020] Example 3

[0021] a. Weigh the raw materials: 22000g rare earth butadiene rubber, 6000g isoprene rubber, 12000g brominated butyl rubber, 2000g polyethylene glycol, 200g stearic acid, 2000g zinc oxide, 1000g homogenizer, 200g activator (made by mixing 100g urea and 100g fatty acid), 480g 2,6-di-tert-butyl-p-cresol, 600g sulfur, 720g accelerator (made by mixing 480g thiazole accelerator, 120g thiuram accelerator, and 120g dithiocarbamate accelerator), 22000g silica, 3200g di(2-butoxyethyl) adipic acid, 400g microcrystalline wax, 2000g water-based tackifying resin, and 1600g Si-69. b. Put all raw materials except sulfur and accelerator into the internal mixer for mixing. Set the mixing temperature to 130℃~135℃ and the time to 9 minutes. After mixing, discharge the material and let the rubber compound cool naturally to below 70℃. c. Put the sulfur, accelerator and cooled rubber compound into a two-roll mill for mixing. The mixing temperature is set to 50℃~70℃ and the time is 7 minutes. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

[0022] Rare earth butadiene rubber exhibits good wear resistance, isoprene rubber possesses excellent elasticity, cold resistance, and high tensile strength, while brominated butyl rubber demonstrates superior anti-slip and cold resistance properties. Stearic acid, zinc oxide, activators, and vulcanizing agents activate the entire vulcanization system, increasing the crosslinking density and heat aging resistance of the vulcanizate, and improving its fatigue life. Mixed accelerators shorten vulcanization time, lower vulcanization temperature, reduce the amount of vulcanizing agent used, and improve the physical and mechanical properties of the rubber. Microcrystalline wax forms a wax film on the surface of the rubber compound, preventing ozone penetration and providing excellent protection.

[0023] 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).

[0024] Table 1

[0025] As can be seen from the data in the table above, the rubber material prepared by this invention has excellent anti-slip performance (in terms of anti-slip coefficient) and cold resistance performance (in terms of hardness, tensile strength, elongation and 90-degree tear force at low temperature (-20℃)), which is far superior to existing products. It also has excellent shock absorption performance and wear resistance.

[0026] 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 cold-resistant, highly slip-resistant rubber material for the sole of athletic shoes, characterized in that: Its raw materials, by weight, include: 40-60 parts of butadiene rubber 10-30 parts of isoprene rubber 30-50 parts of brominated butyl rubber 2-5 parts of polyethylene glycol Stearic acid 0.5–1.5 parts 4-6 parts zinc oxide 2-4 parts of homogenizer Surfactant 0.5–1.5 parts Anti-aging agent 1-3 parts 1.5 to 2.2 parts of vulcanizing agent Accelerator 1.2 to 2 parts 40-65 parts of silica 4-8 parts softening oil 0.5 to 1 part microcrystalline wax 4-8 parts of tackifier 2-5 parts of wear-resistant agent.

2. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The cis-butadiene rubber mentioned is rare earth cis-butadiene rubber.

3. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The active agent is a mixture of urea and fatty acids.

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

5. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The vulcanizing agent is sulfur.

6. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The accelerator is one or a mixture of several of the following: thiazole accelerators, thiuram accelerators, and dithiocarbamate accelerators.

7. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The softening oil is di(2-butoxyethyl) adipate.

8. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The tackifier is an aqueous tackifying resin.

9. The cold-resistant, high-slip-resistant rubber material for sports shoe soles according to claim 1, characterized in that: The wear-resistant agent mentioned is Si-69.

10. A method for preparing a cold-resistant, highly slip-resistant rubber material for the sole of a sports shoe 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 vulcanizing agent and accelerator into internal mixer for mixing. Set the mixing temperature to 120℃~135℃ and the time to 7min~9min. After mixing, discharge the material and let the rubber compound cool naturally to below 70℃. c. Put the vulcanizing agent, accelerator and cooled rubber compound into the open mill for mixing. The mixing temperature is set to 50℃~70℃ and the time is 5min~7min. After mixing, the rubber compound is discharged in sheet form to obtain the finished product.

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