White super-wear-resistant soft rubber and preparation method thereof

Abstract

The invention discloses white super-wear-resistant soft rubber and a preparation method thereof, and belongs to the field of rubber preparation. The rubber is at least prepared from the following raw materials: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of an anti-aging agent, 20-50 parts of carbon black, 10-50 parts of precipitated white carbon black, 10-50 parts of fumed white carbon black, 3-6 parts of a silane coupling agent Si69, 1-3 parts of a rubber dispersant WB16 and 2-5 parts of light-colored naphthenic oil. 0.8 to 1.2 parts of an accelerant and 0.8 to 1.2 parts of sulfur. According to the invention, the carbon black, the precipitation method white carbon black and the gas phase method white carbon black are adopted to reinforce the soft rubber, the interaction relationship between the fillers and the rubber and the interaction relationship between the fillers are balanced, and the silane coupling agent Si69 and the rubber dispersing agent WB16 are matched, so that the carbon black and the white carbon black have good dispersion fluidity in the rubber; the problems that traditional wear-resistant rubber is usually hard, inconvenient to process and produce, limited in industrial application scenarios and the like are solved.

Description

Technical Field

[0001] The invention relates to the field of rubber preparation, and in particular to a white super wear-resistant soft rubber and a preparation method thereof. Background Art

[0002] The wear resistance of rubber is of great significance to rubber. The service life of rubber is closely related to wear resistance. If the wear resistance of rubber can be improved in some scenarios, it can save a lot of resources for industrial enterprises and reduce the country's oil energy consumption. Data shows that if the wear resistance of tires is improved by 10%, 64,000 tons of crude oil can be saved.

[0003] Traditional high-wear-resistant rubber believes that wear resistance and hardness are positively correlated. Therefore, a large amount of reinforcing fillers are added to industrial wear-resistant rubber. Although this method can quickly improve wear resistance, it will cause the rubber hardness to be too high, which will bring various problems: First, environmental protection issues, causing a lot of dust pollution and endangering the health of workers; second, the high hardness causes inconvenience in processing in industrial production; third, the high hardness will reduce the contact area between the rubber and the ground in the tire, resulting in poor anti-slip and comfort of the rubber. The application of wear-resistant rubber is subject to many restrictions. For soft wear-resistant rubber, research is not in-depth. Therefore, it is very necessary to develop a white super-wear-resistant soft rubber with a wider range of applications, more convenient processing, longer life, and greatly extended application scenarios.

[0004] In view of this, the inventor conducted in-depth research on this demand, and thus the present case was produced. Summary of the invention

[0005] In view of the problems of environmental protection, inconvenient processing, poor anti-slip performance and comfort of wear-resistant rubber in the prior art, the present invention provides a white super wear-resistant soft rubber, which solves the problems that traditional wear-resistant rubber is usually hard and inconvenient to process and produce, and has limited application scenarios in industry. It not only facilitates processing and production, but also has a wider range of uses in products. In addition, the white rubber matrix can be expanded into differentiated wear-resistant rubbers such as colored rubber, expanding the application scenarios of wear-resistant rubber in various industrial fields in my country. The specific technical scheme is as follows:

[0006] A white super wear-resistant soft rubber is prepared from at least the following raw materials, measured by weight: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black, 10-50 parts of precipitated silica, 10-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

[0007] A combination of three fillers, carbon black, precipitated silica and fumed silica, is used to reinforce the soft rubber. The interactions between filler and rubber and between fillers are balanced, and silane coupling agent Si69 and rubber dispersant WB16 are used in combination to ensure that carbon black and silica have good dispersion fluidity in the rubber. The silica fully flows and mixes in the rubber molecules, and the hydroxyl groups after hydrolysis of Si69 react with the groups on the surface of silica to form hydrogen bonds that condense into covalent bonds for a firm combination, forming a dynamic three-dimensional spatial network structure with carbon black, precipitated silica, fumed silica, natural rubber and butadiene rubber as nodes, forming a dynamic and static mechanical balance in the rubber system. The obtained rubber has a good reinforcement effect and is soft in hardness, solving the problem that traditional wear-resistant rubber is hard and difficult to process.

[0008] Preferably, the invention is prepared from at least the following raw materials, by mass: 70-90 parts of natural rubber, 10-30 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black, 10-50 parts of precipitated silica, 10-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

[0009] Preferably, the invention is prepared from at least the following raw materials, by mass: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black N220, 10-25 parts of precipitated silica, 20-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

[0010] Preferably, the addition ratio of the carbon black, the precipitated silica and the fumed silica is 4:(1-2):(4-6) by weight. Carbon black, as a commonly used filler for wear-resistant rubber, can improve the material's anti-slip performance and reduce rolling resistance while ensuring that the wear resistance remains basically unchanged. The use of a single carbon black has the problems of difficult dispersion and high rolling resistance. Compared with traditional carbon black rubber, silica has excellent wear resistance, low rolling resistance, anti-slip properties, etc. However, due to the difference in polarity between silica and the rubber surface, it is difficult to disperse it well in non-polar rubber and obtain sufficient interface compatibility.

[0011] Preferably, the carbon black is carbon black N220, and the specific surface area of ​​the precipitated silica is 85-110 m2 / g, the specific surface area of ​​fumed silica is 95-130m 2 / g.

[0012] The research found that by mixing carbon black, precipitated silica and fumed silica in a certain proportion and using silane coupling agent Si69 and rubber dispersant WB16 to improve the dispersion fluidity of the filler and its bonding performance with rubber, the defects of a single filler in terms of dispersibility and rolling resistance can be well compensated. In particular, after the carbon black specifications and the specific surface areas of precipitated silica and fumed silica are designed, carbon black, precipitated silica and fumed silica form a dynamic three-dimensional spatial network structure inside the rubber and between the rubber molecules, and the network points inside the network structure are evenly dispersed, and the connection relationship between the network points is diverse and stable, thus forming a dynamic and static mechanical balance.

[0013] Here, two types of silica are used: precipitated silica and fumed silica. Fumed silica particles are smaller and more evenly dispersed. However, the addition of a small amount of precipitated silica does not affect the overall dispersion performance of the filler. On the contrary, it enriches the network type and connection relationship of the three-dimensional spatial network structure, making the gradient reinforcement effect formed between carbon black, precipitated silica and fumed silica more obvious, thereby improving the stability of the internal system of the rubber.

[0014] Preferably, the invention further comprises 0.8-1.5 parts of a titanate coupling agent by weight, and the ratio of the added amount of the silane coupling agent to the titanate coupling agent is 1:(0.20-0.35);

[0015] The total amount of silane coupling agent Si69 and titanate coupling agent added M1 and the total amount of carbon black, precipitated silica and fumed silica added M2 satisfy the following relationship: <M1 / M2<0.10。

[0016] In the actual production process, silane coupling agent Si69 causes white carbon black to undergo silanization reaction, which plays an important role in improving the bonding performance between white carbon black and rubber and preventing white carbon black from agglomerating. However, when only silane coupling agent Si69 is used, white carbon black, especially precipitated white carbon black, still agglomerates. After adding a combination of titanate coupling agent and silane coupling agent Si69, the dispersion fluidity of carbon black and white carbon black in the rubber system is greatly improved, effectively avoiding the agglomeration problem of fillers.

[0017] Preferably, the antioxidant is selected from at least one of antioxidant SP and antioxidant 4010NA.

[0018] Preferably, the accelerator is selected from one of accelerator CZ and accelerator NOBS.

[0019] The present invention also provides a method for preparing the above-mentioned white super wear-resistant soft rubber, comprising the following steps:

[0020] Step 1, raw material preparation stage, natural rubber and butadiene rubber are plasticized and mixed on an open mixing mill to form a rubber compound;

[0021] Step 2, mixing preparation stage, after mixing other additives except accelerator and sulfur in proportion, add the mixed rubber material and mix in a mixer, the mixing temperature is 50-120°C, the mixing time is 10min-25min, and the accelerator and sulfur are added after the temperature drops to 60°C;

[0022] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 130-160°C, a vulcanization time of 10-15 minutes, and a vulcanization pressure of 14Mpa.

[0023] Preferably, in step 2, the mixed rubber material is first added to a mixer, and then the silane coupling agent Si69, rubber dispersant, light-colored cyclohexane oil and precipitated silica are added, the mixing temperature is 50-110°C, the temperature is increased by 5-10°C after mixing for 1-3 minutes, and then zinc oxide, stearic acid and fumed silica are added. After mixing for 1-3 minutes, the temperature is reduced by 5-10°C, and then carbon black and antioxidant are added. After mixing, the temperature is reduced to 60°C, and accelerator and sulfur are added.

[0024] Since precipitated silica particles are relatively large, it is difficult to disperse them in the rubber system. During mixing, precipitated silica is added first, and silane coupling agent Si69 and rubber dispersant are used to make it preferentially dispersed in the rubber system. Then, fumed silica and carbon black are added to enrich the three-dimensional spatial structure of the filler in the rubber system, which is conducive to the construction of a stable three-dimensional network structure.

[0025] Beneficial effects:

[0026] The beneficial effects produced by the technical solution of the present invention are as follows:

[0027] (1) A combination of three fillers, carbon black, precipitated silica and fumed silica, is used to reinforce the soft rubber. The interaction between filler and rubber and between fillers is balanced. In addition, silane coupling agent Si69 and rubber dispersant WB16 are used to ensure that carbon black and silica have good dispersion fluidity in the rubber. The silica fully flows and mixes in the rubber molecules. The hydroxyl groups of Si69 after hydrolysis react with the groups on the surface of silica to form hydrogen bonds and condense into covalent bonds to firmly bind. A dynamic three-dimensional spatial network structure with carbon black, precipitated silica, fumed silica, natural rubber and butadiene rubber as the network points is formed, forming a dynamic and static mechanical balance in the rubber system. The obtained rubber has a good reinforcement effect and is soft in hardness, solving the problem that traditional wear-resistant rubber is hard and difficult to process.

[0028] (2) Carbon black, precipitated silica and fumed silica are mixed in a certain proportion, and the dispersion fluidity of the filler and its bonding performance with rubber are improved by using silane coupling agent Si69 and rubber dispersant WB16, which can well make up for the defects of single filler in dispersibility and rolling resistance. In particular, after the carbon black specifications and the specific surface areas of precipitated silica and fumed silica are designed, carbon black, precipitated silica and fumed silica form a dynamic three-dimensional spatial network structure inside the rubber and between the rubber molecules, and the network points inside the network structure are evenly dispersed, and the connection relationship between the network points is diverse and stable, thereby forming a dynamic and static mechanical balance.

[0029] (3) Since precipitated silica particles are relatively large, it is difficult to disperse them in the rubber system. During mixing, precipitated silica is added first, and the silane coupling agent Si69 and rubber dispersant are used to make it preferentially dispersed in the rubber system. Then, fumed silica and carbon black are added to enrich the three-dimensional spatial structure of the filler in the rubber system, which is conducive to the construction of a stable three-dimensional spatial network structure. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] This embodiment uses a combination of three fillers, carbon black, precipitated silica and fumed silica, to reinforce soft rubber, balance the interaction between filler and rubber, and between fillers, and cooperate with silane coupling agent Si69 and rubber dispersant WB16 to make carbon black and silica have good dispersion fluidity in rubber, wherein silica fully flows and mixes in rubber molecules, and the hydroxyl groups after hydrolysis of Si69 react with the groups on the surface of silica to form hydrogen bonds and condense into covalent bonds to firmly bind, forming a dynamic three-dimensional spatial network structure with carbon black, precipitated silica, fumed silica, natural rubber and butadiene rubber as the network points, forming a dynamic and static mechanical balance in the rubber system, and the obtained rubber has a good reinforcement effect while being soft in hardness, solving the problem that traditional wear-resistant rubber is hard and difficult to process. The specific implementation method is as follows:

[0032] A white super wear-resistant soft rubber is prepared from at least the following raw materials, measured by weight: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black, 10-50 parts of precipitated silica, 10-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

[0033] As a preferred embodiment, the invention is prepared from at least the following raw materials, by mass: 70-90 parts of natural rubber, 10-30 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black, 10-50 parts of precipitated silica, 10-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

[0034] As a preferred embodiment, the invention is prepared from at least the following raw materials, by mass: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black N220, 10-25 parts of precipitated silica, 20-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

[0035] As a preferred embodiment, the addition ratio of the carbon black, the precipitated silica and the fumed silica is 4:(1-2):(4-6) by weight, preferably 4.0:1.3:5.0. Carbon black, as a commonly used filler for wear-resistant rubber, can improve the material's anti-slip performance and reduce rolling resistance while ensuring that the wear resistance remains basically unchanged; the use of a single carbon black has the problems of difficult dispersion and high rolling resistance. Compared with traditional carbon black rubber, silica has excellent wear resistance, low rolling resistance, anti-slip properties, etc., but due to the difference in polarity between silica and the rubber surface, it is difficult to disperse it well in non-polar rubber and obtain sufficient interface compatibility.

[0036] As a preferred embodiment, the carbon black is carbon black N220, and the specific surface area of ​​the precipitated silica is 85-110 m 2 / g, the specific surface area of ​​fumed silica is 95-130m 2 / g, it is preferred that the specific surface area of ​​fumed silica is larger than that of precipitated silica, and the size of fumed silica is more uniform.

[0037] The research found that by mixing carbon black, precipitated silica and fumed silica in a certain proportion and using silane coupling agent Si69 and rubber dispersant WB16 to improve the dispersion fluidity of the filler and its bonding performance with rubber, the defects of a single filler in terms of dispersibility and rolling resistance can be well compensated. In particular, after the carbon black specifications and the specific surface areas of precipitated silica and fumed silica are designed, carbon black, precipitated silica and fumed silica form a dynamic three-dimensional spatial network structure inside the rubber and between the rubber molecules, and the network points inside the network structure are evenly dispersed, and the connection relationship between the network points is diverse and stable, thus forming a dynamic and static mechanical balance.

[0038] Here, two types of silica are used: precipitated silica and fumed silica. Fumed silica particles are smaller and more evenly dispersed. However, the addition of a small amount of precipitated silica does not affect the overall dispersion performance of the filler. On the contrary, it enriches the network type and connection relationship of the three-dimensional spatial network structure, making the gradient reinforcement effect formed between carbon black, precipitated silica and fumed silica more obvious, thereby improving the stability of the internal system of the rubber.

[0039] As a preferred embodiment, the invention further comprises 0.8-1.5 parts by weight of a titanate coupling agent, wherein the ratio of the added amount of the silane coupling agent to the titanate coupling agent is 1:(0-0.35);

[0040] The total amount of silane coupling agent Si69 and titanate coupling agent added M1 and the total amount of carbon black, precipitated silica and fumed silica added M2 satisfy the following relationship: <M1 / M2<0.10。

[0041] In the actual production process, silane coupling agent Si69 causes white carbon black to undergo silanization reaction, which plays an important role in improving the bonding performance between white carbon black and rubber and preventing white carbon black from agglomerating. However, when only silane coupling agent Si69 is used, white carbon black, especially precipitated white carbon black, still agglomerates. After adding a combination of titanate coupling agent and silane coupling agent Si69, the dispersion fluidity of carbon black and white carbon black in the rubber system is greatly improved, effectively avoiding the agglomeration problem of fillers.

[0042] As a preferred embodiment, the antioxidant is selected from at least one of antioxidant SP and antioxidant 4010NA.

[0043] As a preferred embodiment, the accelerator is selected from one of accelerator CZ and accelerator NOBS.

[0044] This embodiment also provides a method for preparing the above-mentioned white super wear-resistant soft rubber, comprising the following steps:

[0045] Step 1, raw material preparation stage, natural rubber and butadiene rubber are plasticized and mixed on an open mixing mill to form a rubber compound;

[0046] Step 2, mixing preparation stage, after mixing other additives except accelerator and sulfur in proportion, add the mixed rubber material and mix in a mixer, the mixing temperature is 50-120°C, the mixing time is 10min-25min, and the accelerator and sulfur are added after the temperature drops to 60°C;

[0047] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 130-160°C, a vulcanization time of 10-15 minutes, and a vulcanization pressure of 14Mpa.

[0048] As a preferred embodiment, in step 2, the mixed rubber material is first added to a mixer, and then the silane coupling agent Si69, rubber dispersant, light-colored cyclohexane oil and precipitated silica are added. The mixing temperature is 50-110°C. After mixing for 1-3 minutes, the temperature is increased by 5-10°C. Zinc oxide, stearic acid and fumed silica are then added. After mixing for 1-3 minutes, the temperature is reduced by 5-10°C. Then, carbon black and antioxidant are added. After mixing, the temperature is reduced to 60°C, and accelerator and sulfur are added.

[0049] Since precipitated silica particles are relatively large, it is difficult to disperse them in the rubber system. During mixing, precipitated silica is added first, and silane coupling agent Si69 and rubber dispersant are used to make it preferentially dispersed in the rubber system. Then, fumed silica and carbon black are added to enrich the three-dimensional spatial structure of the filler in the rubber system, which is conducive to the construction of a stable three-dimensional network structure.

[0050] The beneficial effects of the white super wear-resistant soft rubber in this embodiment are further reviewed below through several groups of examples and comparative examples.

[0051] Embodiment 1:

[0052] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0053] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0054] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0055] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0056] Embodiment 2:

[0057] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0058] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0059] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 35 parts by mass of carbon black, 20 parts by mass of precipitated silica, 35 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0060] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0061] Embodiment 3:

[0062] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0063] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0064] Step 2, in the mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 1.0 parts by mass of titanate coupling agent, 2 parts by mass of rubber dispersant WB16, and 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0065] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0066] Embodiment 4:

[0067] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0068] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0069] Step 2, in the mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 0.8 parts by mass of titanate coupling agent, 2 parts by mass of rubber dispersant WB16, and 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0070] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0071] Embodiment 5:

[0072] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0073] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0074] Step 2, in the mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 1.2 parts by mass of titanate coupling agent, 2 parts by mass of rubber dispersant WB16, and 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0075] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0076] Embodiment 6:

[0077] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0078] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0079] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 1 part by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0080] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0081] Embodiment 7:

[0082] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0083] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0084] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 3 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclopentane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0085] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0086] Embodiment 8:

[0087] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0088] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0089] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 20 parts by mass of carbon black, 10 parts by mass of precipitated silica, 30 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0090] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0091] Embodiment 9:

[0092] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0093] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0094] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 50 parts by mass of carbon black, 25 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0095] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0096] Embodiment 10:

[0097] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0098] Step 1, raw material preparation stage, 90 parts by weight of natural rubber and 10 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0099] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0100] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0101] Embodiment 11:

[0102] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0103] Step 1, raw material preparation stage, 50 parts by weight of natural rubber and 30 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0104] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0105] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0106] Embodiment 12:

[0107] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0108] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0109] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 20 parts by mass of precipitated silica, 40 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0110] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0111] Embodiment 13:

[0112] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0113] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0114] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 50 parts by mass of carbon black, 10 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0115] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0116] Embodiment 14:

[0117] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0118] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0119] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 3 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0120] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0121] Embodiment 15:

[0122] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0123] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0124] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 6 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0125] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0126] Embodiment 16:

[0127] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0128] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0129] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 25 parts by mass of precipitated silica, 40 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0130] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0131] Embodiment 17:

[0132] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0133] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0134] Step 2, in the mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 35 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, and 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer at a mixing temperature of 100° C. and a mixing time of 20 min. After cooling to 60° C., 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0135] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0136] Embodiment 18:

[0137] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0138] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0139] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 30 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0140] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0141] Embodiment 19:

[0142] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0143] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0144] Step 2, mixing preparation stage, first add the mixed rubber material into the mixer, then add 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant, 3 parts by mass of light-colored cyclohexane oil and 13 parts by mass of precipitated silica, the mixing temperature is 100°C, the temperature is increased by 8°C after mixing for 2 minutes, then add 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid and 50 parts by mass of fumed silica, the temperature is reduced by 8°C after mixing for 2 minutes, and then add 40 parts by mass of carbon black and 1.1 parts by mass of antioxidant, after mixing, cool to 60°C, and add 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur;

[0145] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0146] Embodiment 20:

[0147] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0148] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0149] Step 2, mixing preparation stage, first add the mixed rubber material into the mixer, then add 5 parts by mass of silane coupling agent Si69, 1.0 parts by mass of titanate coupling agent, 2 parts by mass of rubber dispersant, 3 parts by mass of light-colored cyclohexane oil and 13 parts by mass of precipitated silica, the mixing temperature is 100°C, the temperature is increased by 8°C after mixing for 2 minutes, and then add 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid and 50 parts by mass of fumed silica, the temperature is reduced by 8°C after mixing for 2 minutes, and then add 40 parts by mass of carbon black and 1.1 parts by mass of antioxidant, after mixing, cool to 60°C, and add 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur;

[0150] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0151] Comparative Example 1:

[0152] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0153] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0154] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 10 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0155] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0156] Comparative Example 2:

[0157] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0158] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0159] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 60 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0160] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0161] Comparative Example 3:

[0162] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0163] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0164] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 8 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0165] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0166] Comparative Example 4:

[0167] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0168] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0169] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 30 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0170] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0171] Comparative Example 5:

[0172] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0173] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0174] Step 2, in the mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 15 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, and 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer at a mixing temperature of 100° C. and a mixing time of 20 min. After cooling to 60° C., 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0175] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0176] Comparative Example 6:

[0177] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0178] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0179] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 60 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0180] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0181] Comparative Example 7:

[0182] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0183] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0184] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 2 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0185] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0186] Comparative Example 8:

[0187] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0188] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0189] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 7 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0190] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0191] Comparative Example 9:

[0192] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0193] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0194] Step 2, in the mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 2 parts by mass of silane coupling agent Si69, 1 part by mass of titanate coupling agent, 2 parts by mass of rubber dispersant WB16, and 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0195] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0196] Comparative Example 10:

[0197] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0198] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0199] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 0.5 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclopentane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0200] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0201] Comparative Example 11:

[0202] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0203] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0204] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 4 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, and then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0205] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0206] Comparative Example 12:

[0207] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0208] Step 1, raw material preparation stage, 40 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0209] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0210] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0211] Comparative Example 13:

[0212] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0213] Step 1, raw material preparation stage, 100 parts by weight of natural rubber and 20 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0214] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0215] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0216] Comparative Example 14:

[0217] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0218] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 8 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0219] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0220] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0221] Comparative Example 15:

[0222] The preparation method of the white super wear-resistant soft rubber in this embodiment includes the following steps:

[0223] Step 1, raw material preparation stage, 80 parts by weight of natural rubber and 35 parts by weight of butadiene rubber are plasticized and mixed on an open mill to form a rubber compound;

[0224] Step 2, mixing preparation stage, 5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.1 parts by mass of antioxidant, 40 parts by mass of carbon black, 13 parts by mass of precipitated silica, 50 parts by mass of fumed silica, 5 parts by mass of silane coupling agent Si69, 2 parts by mass of rubber dispersant WB16, 3 parts by mass of light-colored cyclohexane oil are mixed, then the mixed rubber is added and mixed in a mixer, the mixing temperature is 100°C, the mixing time is 20min, and after cooling to 60°C, 1.0 parts by mass of accelerator and 1.0 parts by mass of sulfur are added;

[0225] Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 145°C, a vulcanization time of 12 minutes, and a vulcanization pressure of 14 MPa.

[0226] The rubber obtained in Examples 1-20 and Comparative Examples 1-15 was tested for tensile strength, elongation at break and wear resistance, wherein the tensile strength and elongation at break of the rubber were measured according to the measurement method in GB / T528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber". The wear of the rubber was measured according to the measurement method in GB / T 1689-2014 "Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)". The test results are as follows:

[0227] Table 1 Rubber performance test results in each group of examples and comparative examples

[0228]

[0229]

[0230]

[0231] As can be seen from Table 1, the overall properties of the rubber obtained in Examples 1-20, such as tensile strength and abrasion performance, are better than those in Comparative Examples 1-15. Moreover, after using the combined coupling agent in Examples 3-5 and 20, the abrasion is also better than that of Examples 1 and 2 using only the silane coupling agent Si69. After designing the order of adding the components in Step 2 in Examples 19-20, the mechanical properties and abrasion are further improved.

[0232] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A white super wear-resistant soft rubber, characterized in that: The invention is prepared from at least the following raw materials, by weight: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black, 10-50 parts of precipitated silica, 10-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

2. A white super wear-resistant soft rubber according to claim 1, characterized in that: The invention is prepared from at least the following raw materials, by weight: 70-90 parts of natural rubber, 10-30 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black, 10-50 parts of precipitated silica, 10-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

3. A white super wear-resistant soft rubber according to claim 1, characterized in that: The invention is prepared from at least the following raw materials, by mass: 50-90 parts of natural rubber, 10-50 parts of butadiene rubber, 4-5 parts of zinc oxide, 1.8-2.5 parts of stearic acid, 1.0-1.2 parts of antioxidant, 20-50 parts of carbon black N220, 10-25 parts of precipitated silica, 20-50 parts of fumed silica, 3-6 parts of silane coupling agent Si69, 1-3 parts of rubber dispersant WB16, 2-5 parts of light-colored cyclohexane oil, 0.8-1.2 parts of accelerator and 0.8-1.2 parts of sulfur.

4. A white super wear-resistant soft rubber according to claim 3, characterized in that: In parts by mass, the carbon black, the precipitated silica and the fumed silica are added in a ratio of 4:(1-2):(4-6).

5. The white super wear-resistant soft rubber according to claim 3, characterized in that: The carbon black is carbon black N220, and the specific surface area of ​​the precipitated white carbon black is 85-110m 2 / g, the specific surface area of ​​fumed silica is 95-130m 2 / g.

6. The white super wear-resistant soft rubber according to claim 1, characterized in that: 0.8-1.5 parts of titanate coupling agent are also included by weight, and the ratio of the added amount of silane coupling agent to the titanate coupling agent is 1:(0.20-0.35); The total amount of silane coupling agent Si69 and titanate coupling agent added M1 and the total amount of carbon black, precipitated silica and fumed silica added M2 satisfy the following relationship: <M1 / M2<0.10。 7. The white super wear-resistant soft rubber according to claim 1, characterized in that: The antioxidant is selected from at least one of antioxidant SP and antioxidant 4010NA.

8. The white super wear-resistant soft rubber according to claim 1, characterized in that: The accelerator is selected from one of accelerator CZ and accelerator NOBS.

9. A method for preparing the white super wear-resistant soft rubber according to any one of claims 1 to 8, characterized in that: The steps include: Step 1, raw material preparation stage, natural rubber and butadiene rubber are plasticized and mixed on an open mixing mill to form a rubber compound; Step 2, mixing preparation stage, after mixing other additives except accelerator and sulfur in proportion, add the mixed rubber material and mix in a mixer, the mixing temperature is 50-120°C, the mixing time is 10min-25min, and the accelerator and sulfur are added after the temperature drops to 60°C; Step three, the vulcanization stage, the prepared mixed rubber is vulcanized at a temperature of 130-160°C, a vulcanization time of 10-15 minutes, and a vulcanization pressure of 14Mpa.

10. The method for preparing a white super wear-resistant soft rubber according to claim 9, characterized in that: In step 2, the mixed rubber material is first added to the mixer, and then the silane coupling agent Si69, rubber dispersant, light-colored cyclohexane oil and precipitated silica are added. The mixing temperature is 50-110°C. After mixing for 1-3 minutes, the temperature is increased by 5-10°C. Zinc oxide, stearic acid and fumed silica are then added. After mixing for 1-3 minutes, the temperature is reduced by 5-10°C. Then carbon black and antioxidant are added. After mixing, the temperature is reduced to 60°C, and accelerator and sulfur are added.

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