A rubber sole capable of resisting slippery ice surfaces and a preparation method thereof

Abstract

The present invention relates to a rubber sole for resisting slippery ice surface and a preparation method thereof, which comprises, by weight, 55-75 parts of natural rubber, 32-54 parts of EPDM rubber, 15-30 parts of butadiene rubber, 8-16 parts of thermoplastic elastomer SBS, 15-35 parts of filler, 3.2-6.4 parts of lubricant, 1.8-3.6 parts of antioxidant, 2-3 parts of vulcanizing agent and 3.1-5.7 parts of vulcanization accelerator. On the whole, the rubber sole prepared by the present invention has higher strength, elasticity and aging resistance than traditional rubber soles, and has more excellent performance in wet and slip resistance.

Description

Technical Field

[0001] The invention relates to the field of rubber soles, and in particular to a rubber sole capable of resisting slippery ice surfaces and a preparation method thereof. Background Art

[0002] The structure of the sole is quite complex. In a broad sense, it can include all the materials that make up the bottom, such as the outsole, midsole and heel. In a narrow sense, it only refers to the outsole. As for the outsole, rubber soles are generally the first choice for anti-slip. There are many types of rubber sole materials, mainly including natural rubber, cis-1,4-butadiene rubber, isoprene rubber, solution-polymerized styrene-butadiene rubber, EPDM rubber, methyl silicone rubber, etc. The advantages of rubber soles are good softness and elasticity, suitable for various sports, and can play a role in shock absorption and anti-slip.

[0003] For some people who live in cold environments all year round, they often walk on ice. When walking on ice, the liquid water on the ice surface close to zero degrees Celsius will easily form a thin slippery layer, which can easily cause pedestrians to slip. When walking on ice with traditional rubber shoes, the rubber soles mainly improve the anti-slip properties through the anti-slip patterns on the bottom, but the anti-slip effect is often average, and people still need to be extremely careful. In order to improve this phenomenon, it is necessary to improve the materials of rubber soles.

[0004] Therefore, in order to ensure the safety of pedestrians walking on icy roads, reduce unnecessary injuries, and increase the friction coefficient between the soles and the road surface, in addition to requiring unique anti-slip patterns, it is more important to improve the material's anti-slip performance. Summary of the invention

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a rubber sole which is resistant to slippery on icy surfaces and a preparation method thereof.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] In a first aspect, the present invention provides a rubber sole for preventing slippery surfaces on icy surfaces, which comprises, by weight:

[0008] 55-75 parts of natural rubber, 32-54 parts of EPDM rubber, 15-30 parts of butadiene rubber, 8-16 parts of thermoplastic elastomer SBS, 15-35 parts of filler, 3.2-6.4 parts of lubricant, 1.8-3.6 parts of antioxidant, 2-3 parts of vulcanizer and 3.1-5.7 parts of vulcanization accelerator.

[0009] Preferably, the brand of the natural rubber is Indonesian natural rubber SIR-10 or Indonesian natural rubber SIR-20; more preferably, it is Indonesian natural rubber SIR-20.

[0010] Preferably, the brand of the EPDM is one or more of Dow EPDM-3640, Dow EPDM-3760P, Dow EPDM-3722P, Dow EPDM-4640, Dow EPDM-4725P, and Dow EPDM-5565. More preferably, it is EPDM-3760P, with a melt flow rate of 8.6 g / 10 min (230°C / 2.16 kg) and a density of 0.87 g / cm 3 .

[0011] Preferably, the brand of the butadiene rubber is one of BR-9000, BR-9001, and BR-9002; more preferably, it is Sinopec BR-9000.

[0012] Preferably, the thermoplastic elastomer SBS is one of SBS-T171, SBS-D1116, SBS-D1102, and SBS-D1155; more preferably, it is Dushanzi Petrochemical SBS-T171.

[0013] Preferably, the lubricant is one of calcium stearate, magnesium stearate and zinc stearate; more preferably zinc stearate.

[0014] Preferably, the antioxidant is one of antioxidant MMBZ, antioxidant BLE and antioxidant MB; more preferably antioxidant MB (2-mercaptobenzimidazole).

[0015] Preferably, the vulcanizing agent is sulfur.

[0016] Preferably, the vulcanization accelerator is one of vulcanization accelerator TMTD, vulcanization accelerator TT, vulcanization accelerator DPG, and vulcanization accelerator DM; more preferably, it is accelerator TMTD.

[0017] Preferably, the filler is modified white carbon black, and the preparation method of the modified white carbon black comprises:

[0018] S1. Add an aminosilane coupling agent into deionized water, stir until uniform, add powdered silica, treat under ultrasonic conditions until uniform, then heat to 50-60° C., keep warm and stir for 3-8 hours, then centrifuge, wash and dry to obtain amination silica;

[0019] S2, adding epoxybutene (3,4-epoxy-1-butene) into anhydrous ethanol, stirring until uniform, adding amination white carbon black, heating to 45-55°C under the protection of nitrogen, keeping warm and stirring for 6-12h, after the reaction is completed, centrifuging, washing and drying to obtain activated white carbon black;

[0020] S3. Add ethylene glycol dimercaptoacetate into N,N-dimethylformamide, stir until uniform, add activated silica under the protection of nitrogen, stir again until uniform, add photosensitizer, stir for 3-6 hours under ultraviolet light irradiation, and after the reaction is completed, centrifuge, wash and dry to obtain modified silica.

[0021] Preferably, in S1, the aminosilane coupling agent is γ-aminopropylmethyldimethoxysilane or γ-aminopropylmethyldiethoxysilane.

[0022] Preferably, in S1, the particle size of the powdered white carbon black is 30-50 nm.

[0023] Preferably, in S1, the mass volume ratio of powdered white carbon black, aminosilane coupling agent and deionized water is 1 g: (0.13-0.26) g: (10-20) mL.

[0024] Preferably, in S2, the mass volume ratio of amination silica, epoxybutene and anhydrous ethanol is 1 g: (0.17-0.34) g: (20-40) mL.

[0025] Preferably, in S3, the mass volume ratio of activated white carbon black, ethylene glycol dimercaptoacetate and N,N-dimethylformamide is 1 g:(0.42-0.84) g:(20-40) mL.

[0026] Preferably, in S3, the photosensitizer is photosensitizer 651 or photosensitizer 659, and the amount added is 4%-8% of the mass of ethylene glycol dimercaptoacetate; the irradiation intensity of the ultraviolet light is 200-400 mW / cm 2 .

[0027] In a second aspect, the present invention provides a method for preparing a rubber sole that is resistant to slippery ice surfaces, comprising the following steps:

[0028] Step 1, mixing natural rubber, EPDM rubber, butadiene rubber and thermoplastic elastomer SBS into a mixer, and mixing at a temperature of 116-132° C. and a speed of 65-85 r / min for 20-30 min;

[0029] Step 2, add filler, lubricant and antioxidant into the mixer in sequence, and mix at a temperature of 100-115° C. and a speed of 50-70 r / min for 20-30 min;

[0030] Step 3, adding a vulcanizing agent and a vulcanization accelerator to the mixer, mixing evenly, transferring to a vulcanizer, vulcanizing for 40-60 minutes at 155-175° C. and 10-20 MPa, and cutting and grinding to obtain an anti-slip rubber sole on ice surfaces.

[0031] The beneficial effects of the present invention are:

[0032] 1. The present invention prepares a rubber sole, which uses natural rubber, EPDM rubber and butadiene rubber as main materials. On the basis of maintaining the superior performance of natural rubber, its low temperature performance and wear resistance are improved; the thermoplastic elastomer SBS is added to improve the mutual cross-linking between rubber materials; the filler is modified white carbon black, which has better compatibility with rubber materials and can enhance the strength and wet-slip resistance of rubber materials; in addition, additives such as lubricants and antioxidants are added. In general, the rubber sole prepared by the present invention has higher strength, elasticity and aging resistance than traditional rubber soles, especially has better performance in wet-slip resistance.

[0033] 2. The modified silica used in the preparation of rubber soles of the present invention is prepared on the basis of silica powder. The silica powder is first subjected to surface amination treatment to obtain amination silica. Then, epoxybutene is used to carry out epoxy-amino combination reaction with the amination silica to obtain activated silica. Then, ethylene glycol dithioacetate is used to carry out thiol-double bond click chemistry reaction with the activated silica to obtain coated modified silica.

[0034] 3. In the process of preparing modified silica in the present invention, epoxybutene contains both epoxy and olefin groups, which can play a good role in cross-linking. The obtained activated silica has high surface activity and is rich in unsaturated double bonds. It then reacts with ethylene glycol dithioacetate containing a thiol group, and the thiol group and the double bond undergo a click reaction to generate a thioether group, thereby obtaining a modified silica rich in thioether groups. Compared with traditional silica, the affinity between modified silica and rubber is greatly improved. In addition, the characteristics brought by its own surface coating group make it have a good improvement in the strength, elasticity, wear resistance and wet-slip resistance of rubber materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0036] Figure 1 It is a product schematic diagram of the rubber sole for preventing slippery surfaces on icy surfaces prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0037] In order to better understand the above technical scheme, the exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0038] The molecular formula of epoxybutene (3,4-epoxy-1-butene) used in the embodiment of the present invention is C 4 H 6 O, the molecular formula of ethylene glycol dimercaptoacetate is C 6 H 10 O 4 S 2 .

[0039] The present invention will be further described below in conjunction with the following examples.

[0040] Example 1

[0041] A rubber sole for preventing slippery surfaces on ice, comprising, by weight:

[0042] 65 parts of natural rubber, 46 parts of EPDM rubber, 23 parts of butadiene rubber, 12 parts of thermoplastic elastomer SBS, 25 parts of filler, 4.8 parts of lubricant, 2.4 parts of antioxidant, 2.5 parts of vulcanizer and 4.3 parts of vulcanization accelerator.

[0043] The grade of natural rubber is Indonesian natural rubber SIR-20; the grade of EPDM is more preferably EPDM-3760P, the melt flow rate is 8.6g / 10min (230℃ / 2.16kg), and the density is 0.87g / cm 3 The brand of butadiene rubber is Sinopec BR-9000; the thermoplastic elastomer SBS is Dushanzi Petrochemical SBS-T171; the lubricant is zinc stearate; the antioxidant is antioxidant MB (2-mercaptobenzimidazole); the vulcanizing agent is sulfur; and the vulcanization accelerator is vulcanization accelerator TMTD.

[0044] The filler is modified white carbon black, and the preparation method of the modified white carbon black includes:

[0045] S1. Add γ-aminopropylmethyldimethoxysilane to deionized water, stir until uniform, add powdered silica with a particle size of 30-50 nm, the mass volume ratio of powdered silica, γ-aminopropylmethyldimethoxysilane and deionized water is 1 g:0.19 g:15 mL, treat under ultrasonic conditions until uniform, then heat to 55 ° C, keep stirring for 5 hours, then centrifuge, wash and dry to obtain amination silica;

[0046] S2. Add epoxybutene (3,4-epoxy-1-butene) into anhydrous ethanol, stir until uniform, then add amination silica, the mass volume ratio of amination silica, epoxybutene and anhydrous ethanol is 1g:0.25g:30mL, under the protection of nitrogen, heat to 50°C, keep warm and stir for 10h, after the reaction is completed, centrifuge, wash and dry to obtain activated silica;

[0047] S3, add ethylene glycol dimercaptoacetate to N,N-dimethylformamide, stir until uniform, add activated white carbon black under the protection of nitrogen, the mass volume ratio of activated white carbon black, ethylene glycol dimercaptoacetate and N,N-dimethylformamide is 1g:0.63g:30mL, stir again and add photosensitizer 651, the amount added is 6% of the mass of ethylene glycol dimercaptoacetate, at 300mW / cm 2 The mixture was irradiated with ultraviolet light and stirred for 4 hours. After the reaction, it was centrifuged, washed and dried to obtain modified silica.

[0048] The method for preparing the above-mentioned rubber sole that resists slippery ice surfaces comprises the following steps:

[0049] Step 1, natural rubber, EPDM rubber, butadiene rubber, and thermoplastic elastomer SBS are mixed in a mixer, and mixed at a temperature of 124° C. and a speed of 75 r / min for 25 minutes;

[0050] Step 2, add filler, lubricant and antioxidant into the mixer in sequence, and mix at a temperature of 110° C. and a speed of 60 r / min for 25 min;

[0051] Step 3, adding a vulcanizing agent and a vulcanization accelerator to the mixer, mixing evenly, transferring to a vulcanizer, vulcanizing for 50 minutes at 165° C. and 15 MPa, and after cutting and grinding, obtaining a rubber sole that is resistant to slippery ice surfaces.

[0052] Example 2

[0053] A rubber sole for preventing slippery surfaces on ice, comprising, by weight:

[0054] 55 parts of natural rubber, 32 parts of EPDM rubber, 15 parts of butadiene rubber, 8 parts of thermoplastic elastomer SBS, 15 parts of filler, 3.2 parts of lubricant, 1.8 parts of antioxidant, 2 parts of vulcanizer and 3.1 parts of vulcanization accelerator.

[0055] Among them, the brand of natural rubber is Indonesian natural rubber SIR-10; the brand of EPDM is American Dow EPDM-3640. The brand of butadiene rubber is BR-9001. The thermoplastic elastomer SBS is SBS-D1116. The lubricant is calcium stearate, the antioxidant is antioxidant MMBZ, the vulcanizer is sulfur, and the vulcanization accelerator is vulcanization accelerator TT.

[0056] The filler is modified white carbon black, and the preparation method of the modified white carbon black includes:

[0057] S1. Add γ-aminopropylmethyldiethoxysilane to deionized water, stir until uniform, add powdered silica with a particle size of 30-50 nm, the mass volume ratio of powdered silica, γ-aminopropylmethyldiethoxysilane and deionized water is 1 g:0.13 g:10 mL, treat under ultrasonic conditions until uniform, then heat to 50° C., keep stirring for 3 h, then centrifuge, wash and dry to obtain amination silica;

[0058] S2. Add epoxybutene (3,4-epoxy-1-butene) into anhydrous ethanol, stir until uniform, then add amination silica, the mass volume ratio of amination silica, epoxybutene and anhydrous ethanol is 1g:0.17g:20mL, under the protection of nitrogen, heat to 45°C, keep warm and stir for 6h, after the reaction is completed, centrifuge, wash and dry to obtain activated silica;

[0059] S3, add ethylene glycol dimercaptoacetate to N,N-dimethylformamide, stir until uniform, add activated white carbon black under the protection of nitrogen, the mass volume ratio of activated white carbon black, ethylene glycol dimercaptoacetate and N,N-dimethylformamide is 1g:0.42g:20mL, stir again, add photosensitizer 659, the addition amount is 4% of the mass of ethylene glycol dimercaptoacetate, at 200mW / cm 2 Under ultraviolet irradiation, the mixture is stirred for 3 hours. After the reaction is completed, the mixture is centrifuged, washed and dried to obtain modified silica.

[0060] The method for preparing the above-mentioned rubber sole that resists slippery ice surfaces comprises the following steps:

[0061] Step 1, natural rubber, EPDM rubber, butadiene rubber, and thermoplastic elastomer SBS are mixed in a mixer, and mixed at a temperature of 116° C. and a speed of 65 r / min for 20 min;

[0062] Step 2, add filler, lubricant and antioxidant into the mixer in sequence, and mix at a temperature of 100° C. and a speed of 50 r / min for 20 min;

[0063] Step 3, adding a vulcanizing agent and a vulcanization accelerator to the mixer, mixing evenly, transferring to a vulcanizer, vulcanizing for 40 minutes at 155° C. and 10 MPa, and after cutting and grinding, obtaining a rubber sole that is resistant to slippery ice surfaces.

[0064] Example 3

[0065] A rubber sole for preventing slippery surfaces on ice, comprising, by weight:

[0066] 75 parts of natural rubber, 54 parts of EPDM rubber, 30 parts of butadiene rubber, 16 parts of thermoplastic elastomer SBS, 35 parts of filler, 6.4 parts of lubricant, 3.6 parts of antioxidant, 3 parts of vulcanizer and 5.7 parts of vulcanization accelerator.

[0067] Among them, the brand of natural rubber is Indonesian natural rubber SIR-10; the brand of EPDM is American Dow EPDM-3722P. The brand of butadiene rubber is BR-9002. The thermoplastic elastomer SBS is SBS-D1155.

[0068] The lubricant is calcium stearate. The antioxidant is one of antioxidant MMBZ, antioxidant BLE, and antioxidant MB; more preferably antioxidant MB (2-mercaptobenzimidazole). The vulcanizing agent is sulfur. The vulcanization accelerator is one of vulcanization accelerator TMTD, vulcanization accelerator TT, vulcanization accelerator DPG, and vulcanization accelerator DM; more preferably accelerator TMTD.

[0069] The filler is modified white carbon black, and the preparation method of the modified white carbon black includes:

[0070] S1. Add an aminosilane coupling agent into deionized water, stir until uniform, add powdered silica with a particle size of 30-50 nm, the mass volume ratio of powdered silica, γ-aminopropylmethyldimethoxysilane and deionized water is 1 g:0.26 g:20 mL, treat under ultrasonic conditions until uniform, then heat to 60° C., keep stirring for 8 hours, then centrifuge, wash and dry to obtain amination silica;

[0071] S2. Add epoxybutene (3,4-epoxy-1-butene) into anhydrous ethanol, stir until uniform, then add amination silica, the mass volume ratio of amination silica, epoxybutene and anhydrous ethanol is 1g:0.34g:40mL, under the protection of nitrogen, heat to 55°C, keep warm and stir for 12h, after the reaction is completed, centrifuge, wash and dry to obtain activated silica;

[0072] S3, add ethylene glycol dimercaptoacetate to N,N-dimethylformamide, stir until uniform, add activated white carbon black under the protection of nitrogen, the mass volume ratio of activated white carbon black, ethylene glycol dimercaptoacetate and N,N-dimethylformamide is 1g:0.84g:40mL, stir again, add photosensitizer 651, the addition amount is 8% of the mass of ethylene glycol dimercaptoacetate, at 400mW / cm 2 Under ultraviolet irradiation, the mixture is stirred for 6 hours. After the reaction is completed, the mixture is centrifuged, washed and dried to obtain modified silica.

[0073] The method for preparing the above-mentioned rubber sole that resists slippery ice surfaces comprises the following steps:

[0074] Step 1, natural rubber, EPDM rubber, butadiene rubber, and thermoplastic elastomer SBS are mixed in a mixer, and mixed at a temperature of 132° C. and a speed of 85 r / min for 30 min;

[0075] Step 2, add filler, lubricant and antioxidant into the mixer in sequence, and mix at a temperature of 115° C. and a speed of 70 r / min for 30 min;

[0076] Step 3, adding a vulcanizing agent and a vulcanization accelerator to the mixer, mixing evenly, transferring to a vulcanizer, vulcanizing for 60 minutes at 175° C. and 20 MPa, and after cutting and grinding to obtain a rubber sole that is resistant to slippery ice surfaces.

[0077] Comparative Example 1

[0078] A rubber sole, which is different from Example 1 in that the composition of the rubber sole is different, the filler in the composition of Example 1 is replaced by powdered white carbon black with a particle size of 30-50 nm, and the remaining components and processes are the same as Example 1.

[0079] This comparative example is calculated by weight and includes:

[0080] 65 parts of natural rubber, 46 parts of EPDM rubber, 23 parts of butadiene rubber, 12 parts of thermoplastic elastomer SBS, 25 parts of powdered white carbon black, 4.8 parts of lubricant, 2.4 parts of antioxidant, 2.5 parts of vulcanizing agent and 4.3 parts of vulcanization accelerator.

[0081] Comparative Example 2

[0082] A rubber sole, which differs from Example 1 in that the composition of the rubber sole is different, the filler in the composition of Example 1 is replaced by amination silica (prepared in the same way as S1 in Example 1), and the remaining components and processes are the same as those in Example 1.

[0083] This comparative example is calculated by weight and includes:

[0084] 65 parts of natural rubber, 46 parts of EPDM rubber, 23 parts of butadiene rubber, 12 parts of thermoplastic elastomer SBS, 25 parts of amino silica, 4.8 parts of lubricant, 2.4 parts of antioxidant, 2.5 parts of vulcanizing agent and 4.3 parts of vulcanization accelerator.

[0085] Comparative Example 3

[0086] A rubber sole, which differs from Example 1 in that the composition of the rubber sole is different, the filler in the composition of Example 1 is replaced by activated silica (prepared in the same way as S2 in Example 1), and the remaining components and processes are the same as those in Example 1.

[0087] This comparative example is calculated by weight and includes:

[0088] 65 parts of natural rubber, 46 parts of EPDM rubber, 23 parts of butadiene rubber, 12 parts of thermoplastic elastomer SBS, 25 parts of activated silica, 4.8 parts of lubricant, 2.4 parts of antioxidant, 2.5 parts of vulcanizing agent and 4.3 parts of vulcanization accelerator.

[0089] Related tests

[0090] The performance of the rubber sole materials prepared in Example 1 and Comparative Examples 1-3 was tested, including: tensile strength reference standard GB / T 528-2009, tear strength reference standard GB / T 529-2008, rebound rate reference standard GB / T 1681-2009, DIN abrasion was tested using DIN abrasion tester KJ-3025 according to DIN53516 standard, ice friction coefficient test reference anti-slip tester SATRA TM144:2021 (ice surface temperature is -7±2°C, vertical force is 400N), wet dynamic friction coefficient test standard reference NFSIB101.1-2020, and aging treatment is thermal oxygen aging in an oven at 120°C for 72 hours.

[0091] The test results are shown in Table 1:

[0092] Table 1 Performance display of different rubber sole materials

[0093]

[0094] It can be seen from Table 1 that the rubber sole material prepared in Example 1 has higher strength and rebound rate; at the same time, the DIN wear is lower, indicating that it has better wear resistance; the dynamic friction coefficient on ice surface and the dynamic friction coefficient on wet surface are higher, indicating that it has better resistance to ice slip and wet slip; the change in tensile strength after aging is the smallest, indicating that it has stronger aging resistance. In summary, the rubber sole material prepared in Example 1 of the present invention has better strength, elasticity, wear resistance and aging resistance, especially has better performance in wet slip resistance.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0096] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A rubber sole that resists slippery ice surfaces, characterized in that: Calculated by weight, including: 55-75 parts of natural rubber, 32-54 parts of EPDM rubber, 15-30 parts of butadiene rubber, 8-16 parts of thermoplastic elastomer SBS, 15-35 parts of filler, 3.2-6.4 parts of lubricant, 1.8-3.6 parts of antioxidant, 2-3 parts of vulcanizing agent and 3.1-5.7 parts of vulcanization accelerator; The filler is modified white carbon black, and the preparation method of the modified white carbon black comprises: S1. Add an aminosilane coupling agent into deionized water, stir until uniform, add powdered silica, treat under ultrasonic conditions until uniform, then heat to 50-60° C., keep warm and stir for 3-8 hours, then centrifuge, wash and dry to obtain amination silica; S2. Add 3,4-epoxy-1-butene into anhydrous ethanol, stir until uniform, add amination silica, raise the temperature to 45-55°C under the protection of nitrogen, keep warm and stir for 6-12 hours, and after the reaction is completed, centrifuge, wash and dry to obtain activated silica; S3. Add ethylene glycol dimercaptoacetate into N,N-dimethylformamide, stir until uniform, add activated silica under the protection of nitrogen, stir again until uniform, add photosensitizer, stir for 3-6 hours under ultraviolet light irradiation, and after the reaction is completed, centrifuge, wash and dry to obtain modified silica.

2. The anti-slip rubber sole according to claim 1, characterized in that: The brand of the natural rubber is Indonesian natural rubber SIR-10 or Indonesian natural rubber SIR-20; the brand of the EPDM is one or more of Dow EPDM-3640, Dow EPDM-3760P, Dow EPDM-3722P, Dow EPDM-4640, Dow EPDM-4725P, and Dow EPDM-5565.

3. The anti-slip rubber sole according to claim 1, characterized in that: The brand of the butadiene rubber is one of BR-9000, BR-9001 and BR-9002; the thermoplastic elastomer SBS is one of SBS-T171, SBS-D1116, SBS-D1102 and SBS-D1155.

4. The anti-slip rubber sole according to claim 1, characterized in that: The lubricant is one of calcium stearate, magnesium stearate and zinc stearate; the antioxidant is one of antioxidant MMBZ, antioxidant BLE and antioxidant MB.

5. The anti-slip rubber sole according to claim 1, characterized in that: The vulcanizing agent is sulfur; the vulcanization accelerator is one of vulcanization accelerator TMTD, vulcanization accelerator TT, vulcanization accelerator DPG, and vulcanization accelerator DM.

6. The anti-slip rubber sole according to claim 1, characterized in that: In S1, the aminosilane coupling agent is γ-aminopropylmethyldimethoxysilane or γ-aminopropylmethyldiethoxysilane; the mass volume ratio of powdered white carbon black, aminosilane coupling agent and deionized water is 1g:(0.13-0.26)g:(10-20)mL.

7. The anti-slip rubber sole according to claim 1, characterized in that: In S2, the mass volume ratio of amino silica, 3,4-epoxy-1-butene and anhydrous ethanol is 1 g: (0.17-0.34) g: (20-40) mL.

8. The anti-slip rubber sole according to claim 1, characterized in that: In the S3, the mass volume ratio of activated white carbon black, ethylene glycol dimercaptoacetate and N,N-dimethylformamide is 1g:(0.42-0.84)g:(20-40)mL; in the S3, the photosensitizer is photosensitizer 651 or photosensitizer 659, and the added amount is 4%-8% of the mass of ethylene glycol dimercaptoacetate.

9. A method for preparing the rubber sole that resists slippery surfaces on icy surfaces according to claim 1, characterized in that: The following steps are involved: Step 1, mixing natural rubber, EPDM rubber, butadiene rubber and thermoplastic elastomer SBS into a mixer, and mixing at a temperature of 116-132° C. and a speed of 65-85 r / min for 20-30 min; Step 2, add filler, lubricant and antioxidant into the mixer in sequence, and mix at a temperature of 100-115° C. and a speed of 50-70 r / min for 20-30 min; Step 3, adding a vulcanizing agent and a vulcanization accelerator to the mixer, mixing evenly, transferring to a vulcanizer, vulcanizing for 40-60 minutes at 155-175° C. and 10-20 MPa, and cutting and grinding to obtain an anti-slip rubber sole on ice surfaces.

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