A rubber composition for tires, and a method for producing and using the same

Abstract

The application provides a rubber composition for tires and a preparation method and application thereof. The rubber composition for tires of the application applies high-molecular-weight smoked sheet rubber, greatly improves mechanical and dynamic properties of vulcanized rubber, adopts neodymium-based butadiene rubber with wear resistance, fatigue aging resistance and lower heat generation, and applies solution styrene-butadiene rubber with higher thermal stability and good flex resistance at high temperatures, and improves comprehensive performance of the formula in multiple aspects. The application adopts super wear-resistant N134 and uses bio-based white carbon black and conductive carbon black, provides super high wear resistance of the formula, reduces heat generation, and makes the tire not fail due to a large amount of heat accumulation in a continuous operation process. The application adopts a high inorganic metal oxide filling amount method, greatly improves a thermal conductivity coefficient of the formula, further improves heat accumulation resistance of the formula, timely discharges heat generated in an extreme condition, and ensures safety of tire operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tires, in particular to a rubber composition for tires and a preparation method and application thereof. BACKGROUND

[0002] Today, global economic development, import and export trade is a key factor affecting the economic development of each country, the global shipping scale continues to expand, and the container distribution capacity of the port is increasingly demanding. The automation level of the port is continuously improved, the port area is continuously increased, the port transfer equipment is unmanned, and the pace of oil to electricity is faster and faster. The quality of the tire used for the port equipment is higher. The application of new unmanned transfer vehicles (AGV) increases year by year, and the use performance of the tire puts forward higher comprehensive performance requirements.

[0003] Based on the continuous long-time operation of the AGV tire tread rubber, the high frequency of use and the use characteristics of the required anti-static performance, the AGV tire tread must consider the wear resistance, low heat generation, and good fatigue resistance. Since electric drive is the trend of the times, the tire also needs to have the conductivity. It is of great significance to develop an AGV tire tread rubber with high comprehensive performance to ensure the safe driving of the port AGV tire and prolong the service life of the tire.

[0004] At present, the port AGV tire still uses the traditional conventional tire, and the tire performance mainly focuses on wear resistance and weather resistance. It cannot fully meet the use requirements of the AGV tire, and there is no excellent comprehensive performance of the tread formula. SUMMARY

[0005] Therefore, the present application provides a rubber composition for tires and a preparation method and application thereof to solve the technical defects in the prior art.

[0006] In a first aspect, the present application provides a rubber composition for tires, comprising the following components by weight:

[0007] 60-70 parts of tobacco sheet rubber, 10-20 parts of soluble butadiene rubber, 20-30 parts of neodymium butadiene rubber, 125-130 parts of reinforcing material, 1-2 parts of silane coupling agent, 2-3 parts of microcrystalline wax, 2-3 parts of tear-resistant resin, 5-10 parts of zinc oxide, 1-2 parts of stearic acid, 2-6 parts of antioxidant, 1-2 parts of insoluble sulfur, 1-2 parts of accelerator, and 0.1-1 parts of anti-scorching agent.

[0008] Preferably, the molecular weight of the tobacco sheet rubber is 10 6 ~ 10 7 .

[0009] Preferably, the cis-mass content of the neodymium butadiene rubber is > 98%.

[0010] Preferably, the mass content of styrene in the solution polymerized styrene-butadiene rubber is 20% to 22%.

[0011] Preferably, the reinforcing material comprises at least one of white carbon black, carbon black, and conductive carbon black.

[0012] Preferably, the reinforcing material comprises the following components by weight: white carbon black 6 to 10 parts, carbon black 100 to 110 parts, and conductive carbon black 5 to 10 parts.

[0013] Preferably, the carbon black comprises carbon black N134 and / or carbon black N234.

[0014] Preferably, the silane coupling agent comprises Si75 and / or Si69.

[0015] Preferably, the antioxidant comprises antioxidant RD and / or antioxidant 4020.

[0016] Preferably, the accelerator comprises accelerator D and / or accelerator NS.

[0017] Preferably, the scorch retarder comprises scorch retarder CTP.

[0018] Preferably, the tear resistant resin comprises dicyclopentadiene resin.

[0019] In a second aspect, the present application further provides a method for preparing the rubber composition for tires, comprising the following steps:

[0020] The rubber sheet is mixed with part of the carbon black in a first internal mixer, and the rubber sheet carbon black plasticized rubber is obtained after discharging the rubber sheet.

[0021] The rubber sheet carbon black plasticized rubber, neodymium-based butadiene rubber, solution polymerized styrene-butadiene rubber, the remaining carbon black, bio-based white carbon black, conductive carbon black, zinc oxide, stearic acid, silane coupling agent, microcrystalline wax, antioxidant, tear resistant resin are added to a second internal mixer, mixed, discharged, and then extruded in an extruder to obtain a master batch rubber.

[0022] The master batch rubber, insoluble sulfur, accelerator, and scorch retarder are added to a third internal mixer, mixed, and discharged to a mill for mixing to obtain a finished rubber, which is the rubber composition for tires.

[0023] Preferably, the method comprises the following steps:

[0024] The first speed of the first mixer is set to 50-60 rpm, the tobacco sheet glue is put into the first mixer, and the top jack is pressed for 60-70 s; the top jack is raised, 30-40% of the carbon black by mass fraction is added, the top jack is pressed, the glue temperature is raised to 130-140 DEG C, the top jack is raised, and is kept for 20-30 s, the first mixer speed is adjusted to 40-50 rpm, the top jack is pressed, the glue temperature is raised to 150-155 DEG C, the glue is discharged, and the tobacco sheet glue carbon black plasticizing glue is obtained;

[0025] The second mixer speed is set to 40-45 rpm, the tobacco sheet glue carbon black plasticizing glue, neodymium butadiene rubber, solution polymerized butadiene rubber, the remaining carbon black, bio-based white carbon black, conductive carbon black, zinc oxide, stearic acid, silane coupling agent, microcrystalline wax, antioxidant, tear resistance resin are added to the second mixer, the top jack is pressed for 30-40 s; the top jack is raised and kept for 10-20 s, the top jack is pressed, and the glue temperature is raised to 130-140 DEG C; the top jack is raised and kept for 10-20 s, the top jack is pressed, and is mixed to 153-155 DEG C, the second mixer speed is reduced to 5-10 rpm, and is mixed for 50-60 s, the glue is discharged, and after extruding in the extruder, the roll is wrapped and the sheet is cooled to 40-45 DEG C, and is kept for 8-24 h, and the master batch mixing glue is obtained.

[0026] The third mixer speed is set to 15-20 rpm, the master batch mixing glue, insoluble sulfur, accelerator, and anti-scorching agent are added to the third mixer, the top jack is pressed, and is mixed to 90-100 DEG C, the top jack is raised and kept for 5-10 s, the top jack is pressed, and is mixed to 100-110 DEG C, and is discharged to the open mill; the roller temperature of the open mill is raised to 70-80 DEG C, the glue is turned over on the open mill, the glue is wrapped and rolled, the sheet is cooled to 40-45 DEG C, and is kept for 8-24 h, and the final glue is obtained, that is, the rubber composition for tires.

[0027] In a third aspect, the application also provides a rubber composition for tires or a rubber composition for tires in the preparation of an unmanned transfer vehicle tire.

[0028] The rubber composition for tires, the preparation method and the application of the application have the following beneficial effects:

[0029] 1. The tire rubber composition of the present application, by reasonable proportioning of the rubber composition formula, applying a high amount of tobacco sheet rubber, greatly improving the mechanical properties and dynamic properties of the vulcanized rubber, using neodymium butadiene rubber with wear resistance, fatigue resistance and lower heat generation, and using solution styrene-butadiene rubber with better thermal stability and good flex resistance at high temperature, improving the comprehensive performance of the formula in many ways. The service life of the tire can be improved by 10%-15%; the present application uses super wear-resistant N134 with bio-based silica and conductive carbon black, providing super wear resistance of the formula, while reducing heat generation, so that the tire will not accumulate a large amount of heat during continuous operation and cause failure; the present application uses a high inorganic metal oxide (zinc oxide) filling method, which greatly improves the thermal conductivity of the formula, further improves the heat accumulation resistance of the formula, and timely discharges the heat generated during extreme conditions to ensure the safety of tire operation; the present application uses super wear-resistant carbon black to improve the conductive performance of the tire tread, and fills conductive carbon black to further reduce the resistance of the tread rubber, which is 50% lower than that of ordinary treads, less than 100000Ω, so that the tread rubber can discharge static electricity in time when it contacts the ground, improving the safety of equipment use; the present application increases the use amount of bio-based silica and reduces the use amount of carbon black, thereby reducing carbon dioxide emissions and achieving immeasurable economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any inventive labor.

[0031] Figure 1 The change of tensile strength of the tire rubber composition prepared in Examples 1-4 and Comparative Examples 1-2;

[0032] Figure 2 The change of middle temperature rise of the tire rubber composition prepared in Examples 1-4 and Comparative Examples 1-2;

[0033] Figure 3 The change of volume resistance of the tire rubber composition prepared in Examples 1-4 and Comparative Examples 1-2;

[0034] Figure 4 The change of Akron abrasion of the tire rubber composition prepared in Examples 1-4 and Comparative Examples 1-2;

[0035] Figure 5 The change of 60℃ thermal conductivity of the tire rubber composition prepared in Examples 1-4 and Comparative Examples 1-2. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0037] The present application provides a rubber composition for tires, comprising the following components by weight:

[0038] The rubber composition for tires of the present application comprises the following components by weight: smoked sheet rubber 60-70 parts, solution styrene-butadiene rubber 10-20 parts, neodymium-based butadiene rubber 20-30 parts, reinforcing material 125-130 parts, silane coupling agent 1-2 parts, microcrystalline wax 2-3 parts, tear-resistant resin 2-3 parts, zinc oxide 5-10 parts, stearic acid 1-2 parts, antioxidant 2-6 parts, insoluble sulfur 1-2 parts, accelerator 1-2 parts, and scorch retarder 0.1-1 part.

[0039] The rubber composition for tires of the present application comprises the following components by weight: smoked sheet rubber 60-70 parts, solution styrene-butadiene rubber 10-20 parts, neodymium-based butadiene rubber 20-30 parts, reinforcing material 125-130 parts, silane coupling agent 1-2 parts, microcrystalline wax 2-3 parts, tear-resistant resin 2-3 parts, zinc oxide 5-10 parts, stearic acid 1-2 parts, antioxidant 2-6 parts, insoluble sulfur 1-2 parts, accelerator 1-2 parts, and scorch retarder 0.1-1 part. 6 7 g / mol, the use of high-molecular-weight smoked sheet rubber improves the mechanical properties of the formula, and improves the strength and comprehensive performance of the formula; the butadiene rubber is neodymium-based butadiene rubber with a cis content of > 98%, the use of neodymium-based butadiene rubber provides the formula with higher strength, better wear resistance and fatigue aging resistance, and lower heat generation, which is superior to the use of nickel-based butadiene rubber in traditional formulas; the styrene-butadiene rubber is solution styrene-butadiene rubber with a styrene content of 20%-22%. The solution styrene-butadiene rubber has good thermal stability and is not prone to aging, and maintains good properties at high temperatures. The preferred use of raw rubber comprehensively improves the comprehensive performance of the formula.

[0040] In some embodiments, the molecular weight of the smoked sheet rubber is 10 6 7 .

[0041] In some embodiments, the cis mass content of the neodymium-based butadiene rubber is > 98%.

[0042] In some embodiments, the styrene mass content of the solution styrene-butadiene rubber is 20%-22%.

[0043] In some embodiments, the reinforcing material comprises at least one of white carbon black, carbon black, and conductive carbon black.

[0044] ​​In some embodiments, the reinforcing material comprises the following components by weight: 6-10 parts of white carbon black, 100-110 parts of carbon black, 5-10 parts of conductive carbon black.

[0045] In some embodiments, the carbon black comprises carbon black N134 and / or carbon black N234, the carbon black N234 is CABOT carbon black N234 for rubber, and the carbon black N134 is Nankheng carbon black N134 for rubber.

[0046] In some embodiments, the white carbon black is a bio-based white carbon black, and the conductive carbon black is V72 conductive carbon black, i.e. CABOT VXC72 conductive carbon black.

[0047] In some embodiments, the silane coupling agent comprises Si75 and / or Si69. Specifically, Si75 is bis-[gamma-(triethoxysil)propyl]-disulfide (Si75), and the silane coupling agent Si-69 is bis-[gamma-(triethoxysil)propyl]tetrasulfide.

[0048] In some embodiments, the antioxidant comprises antioxidant RD and / or antioxidant 4020. Specifically, antioxidant RD, also known as antioxidant RD, antioxidant 224, has a molecular formula of C 12 H 17 N; antioxidant 4020, also known as antioxidant DMBPPD, belongs to p-phenylenediamine rubber antioxidant, and has a molecular formula of C 18 H 24 N2.

[0049] In some embodiments, the accelerator comprises accelerator D and / or accelerator NS. Accelerator D, also known as diphenyl guanidine, has a molecular formula of C 13 H 13 N3; accelerator NS, chemical name: N-tert-butyl-2-benzothiazole sulfenamide, has a molecular formula of C 11 H 14 N2S2.

[0050] In some embodiments, the scorch retarder comprises scorch retarder CTP, i.e. N-cyclohexylthiophthalimide, which has a molecular formula of C 14 H 15 O2NS.

[0051] In some embodiments, the anti-tear resin comprises dicyclopentadiene resin, specifically Korean Kolon anti-tear resin: dicyclopentadiene resin KPE-F6115 (dicyclopentadiene phenolic resin).

[0052] In some embodiments, the insoluble sulfur is Flex insoluble sulfur OT-20.

[0053] Based on the same inventive concept, the application also provides a preparation method of the rubber composition for tires, comprising the following steps:

[0054] S1, mixing the tobacco sheet glue and part of the carbon black in a first internal mixer, discharging the glue, and obtaining a tobacco sheet glue carbon black plasticized rubber;

[0055] S2, adding the tobacco sheet glue carbon black plasticized rubber, neodymium butadiene rubber, solution polymerized styrene butadiene rubber, the remaining carbon black, bio-based white carbon black, conductive carbon black, zinc oxide, stearic acid, silane coupling agent, microcrystalline wax, antioxidant, tear-resistant resin into a second internal mixer, mixing, discharging the glue, and then extruding in an extruder to obtain a master batch rubber;

[0056] S3, adding the master batch rubber, insoluble sulfur, accelerator, and anti-scorching agent into a third internal mixer, mixing, discharging to an open mill, and turning the rubber to obtain a finished rubber, which is the rubber composition for tires.

[0057] In some embodiments, the preparation method of the rubber composition for tires comprises the following steps:

[0058] S1, setting the rotation speed of the first internal mixer to 50-60 rpm, putting the tobacco sheet glue into the first internal mixer, and pressing the top jack for 60-70 s; raising the top jack, adding carbon black with a mass fraction of 30-40%, pressing the top jack, waiting for the glue temperature to rise to 130-140℃, raising the top jack, and keeping for 20-30 s; adjusting the rotation speed of the first internal mixer to 40-50 rpm, pressing the top jack, waiting for the glue temperature to rise to 150-155℃, discharging the glue, and obtaining a tobacco sheet glue carbon black plasticized rubber;

[0059] S2, setting the rotation speed of the second internal mixer to 40-45 rpm, adding the tobacco sheet glue carbon black plasticized rubber, neodymium butadiene rubber, solution polymerized styrene butadiene rubber, the remaining carbon black, bio-based white carbon black, conductive carbon black, zinc oxide, stearic acid, silane coupling agent, microcrystalline wax, antioxidant, and tear-resistant resin into the second internal mixer, pressing the top jack for 30-40 s; raising the top jack, keeping for 10-20 s, pressing the top jack, waiting for the glue temperature to rise to 130-140℃; raising the top jack, keeping for 10-20 s, pressing the top jack, mixing to 153-155℃, reducing the rotation speed of the second internal mixer to 5-10 rpm, mixing for 50-60 s, discharging the glue, and then extruding in an extruder to obtain a master batch rubber;

[0060] S3, set the third speed of the mixer to 15-20 rpm, add the masterbatch, insoluble sulfur, accelerator and anti-scorching agent to the third mixer, press the jacks, mix to 90-100 DEG C, pull the jacks for 5-10 s, press the jacks, mix to 100-110 DEG C, and discharge to the open mill; the roller temperature of the open mill is raised to 70-80 DEG C, and the rubber is turned on the open mill, the rubber is wrapped on the roller after turning, the rubber is cut, cooled to 40-45 DEG C, and stored for 8-24 h to obtain the final rubber compound, i.e., the rubber composition for tires.

[0061] Based on the same inventive concept, the application also provides an application of the above-mentioned rubber composition for tires or the rubber composition for tires prepared by the above-mentioned method in preparing tires for unmanned transfer vehicles.

[0062] The application is aimed at the defects of the existing conventional port AGV (unmanned transfer vehicle) tires, and provides a new rubber composition for tires for port AGVs and a preparation method, which uses high-performance smoked sheet rubber to improve the comprehensive performance of the tread formula, uses neodymium butadiene rubber and solution-polymerized styrene-butadiene rubber to improve the wear resistance and fatigue aging resistance, and improves the dispersion of super-wear-resistant carbon black, bio-based white carbon black and conductive carbon black through reasonable material ratio, and the optimal mixing process performance can improve the mechanical properties of the rubber compound, improve the wear resistance, low heat generation, fatigue resistance and conductivity of the AGV tire tread, improve the comprehensive performance, and prolong the service life of the tire.

[0063] The present application discloses a tire rubber composition and a preparation method thereof, which adopts a high-performance smoked sheet rubber, a solution-polymerized styrene-butadiene rubber and a neodymium-based butadiene rubber combined raw rubber system, and the high-performance smoked sheet rubber has excellent comprehensive performance under the condition that the tire bears high load equipment and runs for a long time. The solution-polymerized styrene-butadiene rubber and the neodymium-based butadiene rubber are used, and the neodymium-based butadiene rubber has a cis-molecular structure of more than 98%, which can improve the wear resistance and fatigue aging resistance of the rubber material during the long-time running of the tire. Since the cis-content is higher, the flexibility between the molecules of the material is better, and the internal friction heat is lower. The solution-polymerized styrene-butadiene rubber is used, and the thermal stability of the tread rubber during the running process is better. The reinforcing system adopts N134 super wear-resistant carbon black, bio-based white carbon black and V72 conductive carbon black. The N134 carbon black is a super wear-resistant carbon black with fine particles, and the tread with the N134 carbon black has high strength, and the wear resistance and resilience are obviously improved. The V72 conductive carbon black has good conductivity, and the tread has obvious conductivity and significantly reduced resistance after the V72 conductive carbon black is added, so that the accumulation of static electricity is effectively prevented, and the safety of the equipment running is improved. The tear resistance of the rubber is obviously improved, and the hysteresis heat of the rubber is reduced after the bio-based white carbon black is added. The comprehensive performance of the tread rubber is improved after the bio-based white carbon black and the super wear-resistant carbon black are used together. Meanwhile, the bio-based white carbon black is a sustainable green material, which is green and environmentally friendly. The high inorganic metal oxide filling amount method greatly improves the thermal conductivity of the formula, further improves the tolerance of the formula to heat accumulation, timely discharges the heat generated in the extreme conditions, and ensures the safety of the tire running. The anti-aging system of the p-phenylenediamine antioxidant 4020 and the ketone amine antioxidant RD is used, and the tread rubber has good protection effect on ozone aging, dynamic flex fatigue, thermal oxygen aging and the like. Compared with ordinary sulfur, the insoluble sulfur has larger molecules and higher melting point, is not easy to scorch after mixing, and can avoid the interface adhesion caused by blooming. The tear-resistant resin is added, which can improve the modulus stability of the rubber material in the use process, is not easy to appear fatigue cracks, and can delay the growth rate of the rubber aging cracks.

[0064] The present application has obvious advantages over the traditional port tire tread comprehensive performance by the specific combination of materials and the advanced processing technology. The rubber material is used as the tire tread rubber material of the port AGV special tire, and the tire tread rubber does not have problems such as tread chunking, early shoulder emptying and pattern groove cracking under the use conditions of long time, high frequency, high load and static electricity accumulation, and has better wear resistance and conductivity. In summary, the tire has a long service life and runs more safely.

[0065] The following detailed embodiments further illustrate the tire rubber composition and its preparation method of this application. This section further explains the invention in conjunction with specific embodiments, but should not be construed as limiting the invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art. Unless otherwise specified, the reagents, methods, and equipment used in this invention are conventional reagents, methods, and equipment in the art.

[0066] Example 1

[0067] This embodiment provides a rubber composition for tires, comprising the following components in parts by weight:

[0068] 60 parts smoked sheet rubber, 10 parts solution-polymerized styrene-butadiene rubber, 30 parts neodymium-based cis-butadiene rubber, 8 parts rice husk-derived bio-based silica, 4 parts carbon black N1345, 8 parts V72 conductive carbon black, 1.6 parts silane coupling agent Si69, 2 parts microcrystalline wax, 2 parts tear-resistant resin, 8 parts zinc oxide, 1 part stearic acid, 1.5 parts antioxidant 4020, 1.5 parts antioxidant RD, 1.8 parts insoluble sulfur OT-20, 1.2 parts accelerator NS, and 0.1 parts scorching inhibitor CTP;

[0069] The smoked sheet adhesive is Indonesian RSS1 (i.e., RSS1# smoked sheet adhesive), with a molecular weight of 10. 6 ~10 7 ;

[0070] The solution-polymerized styrene-butadiene rubber is SSBR72612F, a functionalized solution-polymerized styrene-butadiene rubber produced by Dushanzi Petrochemical Company. The styrene content in the solution-polymerized styrene-butadiene rubber is 20% to 22% by mass.

[0071] The neodymium-based cis-butadiene rubber is Dushanzi Petrochemical-neodymium-butadiene rubber BR9101, in which the cis mass content is >98%;

[0072] The bio-based precipitated silica is Panjin (Fenghai) Rice Biotechnology Co., Ltd. (an enterprise invested by Yihai Kerry Arawana Grain & Oil Food Co., Ltd.)'s rice husk-derived bio-based precipitated silica (precipitated silica extracted from rice husk ash) SilicaPowder-K160.

[0073] The tear-resistant resin is Kolon tear-resistant resin from South Korea: dicyclopentadiene resin KPE-F6115;

[0074] The method for preparing the above-mentioned rubber composition for tires includes the following steps:

[0075] S1, set the first speed of the mixer to 55 rpm, and add the tobacco sheet glue into the first mixer. Press the top bolt for 60 s. Raise the top bolt, add 30% by mass of carbon black N134, press the top bolt, and wait for the glue temperature to rise to 130°C. Raise the top bolt and keep for 20 s. Adjust the first speed of the mixer to 40 rpm, press the top bolt, and wait for the glue temperature to rise to 150°C. Discharge the glue to obtain a tobacco sheet glue carbon black plasticized glue;

[0076] S2, set the second speed of the mixer to 40 rpm, and add the tobacco sheet glue carbon black plasticized glue, neodymium butadiene rubber, solution polymerized styrene butadiene rubber, the remaining 70% by mass of carbon black N134, bio-based white carbon black, V72 conductive carbon black, zinc oxide, stearic acid, silane coupling agent Si69, microcrystalline wax, antioxidant 4020, antioxidant RD, tear-resistant resin into the second mixer. Press the top bolt for 30 s. Raise the top bolt and keep for 10 s. Press the top bolt and wait for the glue temperature to rise to 130°C. Raise the top bolt and keep for 10 s. Press the top bolt and mix to 155°C. Reduce the second speed of the mixer to 10 rpm, mix for 50 s, and discharge the glue. After extruding in the extruder, wrap the roll and cut the sheet. Cool to 40°C and stop for 24 h to obtain a master glue mixed glue.

[0077] S3, set the third speed of the mixer to 20 rpm, and add the master glue mixed glue, insoluble sulfur OT-20, accelerator NS, and anti-scorching agent CTP into the third mixer. Press the top bolt, mix to 90°C, raise the top bolt and keep for 5 s, press the top bolt, mix to 100°C, and discharge the material to the open mill. Raise the roller temperature of the open mill to 70°C, complete the glue turning on the open mill, cut the sheet after wrapping the roll, cool to 40°C, and stop for 24 h to obtain a final glue, which is a rubber composition for tires.

[0078] Example 2

[0079] The present embodiment provides a rubber composition for tires, which comprises the following components by weight:

[0080] Tobacco sheet glue 65 parts, solution polymerized styrene butadiene rubber 10 parts, neodymium butadiene rubber 25 parts, bio-based white carbon black 8 parts, carbon black N134 55 parts, V72 conductive carbon black 8 parts, silane coupling agent Si69 1.6 parts, microcrystalline wax 2 parts, tear-resistant resin 2 parts, zinc oxide 8 parts, stearic acid 1 part, antioxidant 4020 1.5 parts, antioxidant RD 1.5 parts, insoluble sulfur OT-20 1.8 parts, accelerator NS 1.2 parts, and anti-scorching agent CTP 0.1 part.

[0081] The tobacco sheet glue is Indonesian No. 1 tobacco sheet glue RSS1 (i.e., RSS1# tobacco sheet glue), and the molecular weight is 10 6 ~10 7 ;

[0082] Solution polymerized styrene-butadiene rubber is functionalized solution polymerized styrene-butadiene rubber SSBR72612F of Dushanzi Petrochemical Company, and the mass content of styrene in the solution polymerized styrene-butadiene rubber is 20% to 22%;

[0083] Neodymium-based butadiene rubber is Dushanzi Petrochemical-Neodymium-based butadiene rubber BR9101, and the mass content of cis in the neodymium-based butadiene rubber is > 98%;

[0084] Bio-based white carbon black is rice hull source bio-based white carbon black (white carbon black extracted from rice hull ash) Silica Powder-K160 of Panjin (Fenghai) Rice Bio-technology Co., Ltd. (an enterprise invested by Yihai Kerry Gold Dragon Fish Food Co., Ltd.);

[0085] Anti-tear resin is Korean Koron anti-tear resin: dicyclopentadiene resin KPE-F6115;

[0086] The preparation method of the above tire rubber composition comprises the following steps:

[0087] S1, set the first mixer speed to 55 rpm, put the smoked sheet rubber into the first mixer, and press the top bolt for 60 s; raise the top bolt, add 30% by mass of carbon black N134, press the top bolt, and wait for the rubber temperature to rise to 130 DEG C, raise the top bolt, and keep for 20 s, adjust the first mixer speed to 40 rpm, press the top bolt, wait for the rubber temperature to rise to 150 DEG C, discharge the rubber, and get the smoked sheet rubber carbon black plasticized rubber;

[0088] S2, set the second mixer speed to 40 rpm, add the smoked sheet rubber carbon black plasticized rubber, neodymium-based butadiene rubber, solution polymerized styrene-butadiene rubber, the remaining 70% by mass of carbon black N134, bio-based white carbon black, V72 conductive carbon black, zinc oxide, stearic acid, silane coupling agent Si69, microcrystalline wax, antioxidant 4020, antioxidant RD, and anti-tear resin into the second mixer, press the top bolt for 30 s; raise the top bolt, keep for 10 s, press the top bolt, and wait for the rubber temperature to rise to 130 DEG C; raise the top bolt, keep for 10 s, press the top bolt, and mix to 155 DEG C; reduce the second mixer speed to 10 rpm, mix for 50 s, discharge the rubber, extrude in the extruder, wrap the roller, and cool to 40 DEG C, and stop for 24 h, to get the master batch rubber;

[0089] S3, set the third mixer speed to 20 rpm, add the master batch rubber, insoluble sulfur OT-20, accelerator NS, and scorch retardant CTP into the third mixer, press the top bolt, mix to 90 DEG C, raise the top bolt and keep for 5 s, press the top bolt, mix to 100 DEG C, and discharge to the open mill; raise the open mill roller temperature to 70 DEG C, complete the rubber mixing on the open mill, wrap the rubber after mixing, wrap the roller, cool to 40 DEG C, and stop for 24 h, to get the final rubber, which is the tire rubber composition.

[0090] Example 3

[0091] The present example provides a rubber composition for tires, comprising the following components by weight:

[0092] 70 parts of smoke sheet rubber, 10 parts of solution styrene-butadiene rubber, 20 parts of neodymium-based butadiene rubber, 8 parts of bio-based white carbon black, 54 parts of carbon black N134, 8 parts of V72 conductive carbon black, 1.6 parts of silane coupling agent Si69, 2 parts of microcrystalline wax, 2 parts of tear-resistant resin, 8 parts of zinc oxide, 1 part of stearic acid, 1.5 parts of antioxidant 4020, 1.5 parts of antioxidant RD, 1.8 parts of insoluble sulfur OT-20, 1.2 parts of accelerator NS, and 0.1 part of scorch retarder CTP;

[0093] The smoke sheet rubber is Indonesian No. 1 smoke sheet rubber RSS1 (i.e. RSS1# smoke sheet rubber), and the molecular weight is 10 6 ~ 10 7 ;

[0094] The solution styrene-butadiene rubber is functionalized solution styrene-butadiene rubber SSBR72612F from Dushanzi Petrochemical Company, and the mass content of styrene in the solution styrene-butadiene rubber is 20%~22%;

[0095] The neodymium-based butadiene rubber is Dushanzi Petrochemical-Neodymium-based butadiene rubber BR9101, and the mass content of cis in the neodymium-based butadiene rubber is >98%;

[0096] The bio-based white carbon black is rice husk source bio-based white carbon black (white carbon black extracted from rice husk ash) Silica Powder-K160 from Panjin (Fenghai) Rice Bio-technology Co., Ltd. (an enterprise invested by Yihai Kerry Goldlion Fish & Food Co., Ltd.);

[0097] The tear-resistant resin is a tear-resistant resin from South Korea: dicyclopentadiene resin KPE-F6115;

[0098] The preparation method of the above-mentioned rubber composition for tires comprises the following steps:

[0099] S1, set the first internal mixer speed to 55 rpm, put the smoke sheet rubber into the first internal mixer, and press the top jack for 60 s; raise the top jack, add 30% by mass of carbon black N134, press the top jack, and wait for the temperature of the rubber compound to rise to 130℃, raise the top jack, and keep for 20 s, adjust the first internal mixer speed to 40 rpm, press the top jack, and wait for the temperature of the rubber compound to rise to 150℃, discharge the rubber compound, and obtain a smoke sheet rubber carbon black plasticized rubber compound;

[0100] S2, set the second speed of the mixer to 40 rpm, add the smoked sheet rubber carbon black plasticized rubber, neodymium butadiene rubber, solution polybutadiene rubber, the remaining 70% of the mass fraction of carbon black N134, bio-based white carbon black, V72 conductive carbon black, zinc oxide, stearic acid, silane coupling agent Si69, microcrystalline wax, antioxidant 4020, antioxidant RD, tear resistance resin to the second mixer, press the top bolt for 30s; raise the top bolt, keep for 10s, press the top bolt, wait for the temperature of the rubber to rise to 130℃; raise the top bolt, keep for 10s, press the top bolt, mix to 155℃, reduce the speed of the second mixer to 10rpm, mix for 50s, discharge the glue, after extruding in the extruder, roll down the sheet, cool to 40℃, stop for 24h, get the masterbatch rubber compound;

[0101] S3, set the third speed of the mixer to 20 rpm, add the masterbatch rubber compound, insoluble sulfur OT-20, accelerator NS, anti-scorching agent CTP to the third mixer, press the top bolt, mix to 90℃, raise the top bolt and keep for 5s, press the top bolt, mix to 100℃, discharge to the open mill; raise the roller temperature of the open mill to 70℃, complete the rubber turning on the open mill, roll down the sheet after the rubber turning, cool to 40℃, stop for 24h, get the final rubber compound, which is the rubber composition for tires.

[0102] Example 4

[0103] The present embodiment provides a rubber composition for tires, which comprises the following components by weight:

[0104] 70 parts of smoked sheet rubber, 10 parts of solution polybutadiene rubber, 20 parts of neodymium butadiene rubber, 8 parts of bio-based white carbon black, 55 parts of carbon black N234, 1.6 parts of silane coupling agent Si69, 2 parts of microcrystalline wax, 2 parts of tear resistance resin, 8 parts of zinc oxide, 1 part of stearic acid, 1.5 parts of antioxidant 4020, 1.5 parts of antioxidant RD, 1.8 parts of insoluble sulfur OT-20, 1.2 parts of accelerator NS, and 0.1 part of anti-scorching agent CTP;

[0105] The smoked sheet rubber is Indonesian No. 1 smoked sheet rubber RSS1 (i.e. RSS1# smoked sheet rubber), and the molecular weight is 10 6 ~10 7 ;

[0106] The solution polybutadiene rubber is functionalized solution polybutadiene rubber SSBR72612F from Dushanzi Petrochemical Company, and the mass content of styrene in the solution polybutadiene rubber is 20%~22%;

[0107] The neodymium butadiene rubber is Dushanzi Petrochemical-Neodymium Butadiene Rubber BR9101, and the mass content of cis in the neodymium butadiene rubber is >98%;

[0108] Bio-based silica is a rice hull source bio-based silica (silica powder extracted from rice hull ash) Silica Powder-K160 of Panjin (Fenghai) Rice Bio-technology Co., Ltd. (an enterprise invested by Yihai Kerry Gold Dragon Fish Food Co., Ltd.);

[0109] Anti-tear resin is a Korean Kelong anti-tear resin: dicyclopentadiene resin KPE-F6115;

[0110] The preparation method of the above-mentioned rubber composition for tires comprises the following steps:

[0111] S1, set the first mixer speed to 55 rpm, put the tobacco sheet rubber into the first mixer, and press the jack for 60 s; raise the jack, add 30% by mass fraction of carbon black N234, press the jack, wait for the rubber temperature to rise to 130℃, raise the jack, keep for 20 s, adjust the first mixer speed to 40 rpm, press the jack, wait for the rubber temperature to rise to 150℃, discharge the rubber, and obtain the tobacco sheet rubber carbon black plasticized rubber;

[0112] S2, set the second mixer speed to 40 rpm, add the tobacco sheet rubber carbon black plasticized rubber, neodymium butadiene rubber, solution polymerized styrene butadiene rubber, the remaining 70% by mass fraction of carbon black N234, bio-based silica, zinc oxide, stearic acid, silane coupling agent Si69, microcrystalline wax, antioxidant 4020, antioxidant RD, and anti-tear resin into the second mixer, press the jack for 30 s; raise the jack, keep for 10 s, press the jack, wait for the rubber temperature to rise to 130℃; raise the jack, keep for 10 s, press the jack, mix to 155℃, reduce the second mixer speed to 10 rpm, mix for 50 s, discharge the rubber, extrude in the extruder, wrap the roller, cool to 40℃, and stop for 24 h, to obtain the master batch rubber;

[0113] S3, set the third mixer speed to 20 rpm, add the master batch rubber, insoluble sulfur OT-20, accelerator NS, and anti-scorching agent CTP into the third mixer, press the jack, mix to 90℃, raise the jack and keep for 5 s, press the jack, mix to 100℃, and discharge to the open mill; raise the roller temperature of the open mill to 70℃, complete the rubber mixing on the open mill, wrap the rubber after mixing, wrap the rubber, cool to 40℃, and stop for 24 h, to obtain the finished rubber, which is the rubber composition for tires.

[0114] Comparative Example 1

[0115] The present comparative example provides a rubber composition for tires, which comprises the following components by weight:

[0116] Natural rubber 65 parts, cis-butadiene rubber 35 parts, carbon black N234 62 parts, microcrystalline wax 2 parts, zinc oxide 3 parts, stearic acid 1 part, antioxidant 4020 1.5 parts, antioxidant RD 1.5 parts, aromatic oil 4 parts, insoluble sulfur OT-20 1.8 parts, accelerator NS 1.2 parts, scorch retarder CTP 0.1 part;

[0117] The natural rubber is 20# natural rubber (i.e. natural rubber TSR-20);

[0118] The cis-butadiene rubber is Daqing Petrochemical butadiene rubber, model BR9000;

[0119] The preparation method of the above tire rubber composition comprises the following steps:

[0120] S1, set the first internal mixer speed to 55 rpm, put the natural rubber into the first internal mixer, press the top bolt for 60 s; raise the top bolt, add 30% by mass fraction of carbon black N234, press the top bolt, wait for the temperature of the rubber compound to rise to 130℃, raise the top bolt, keep for 20 s, adjust the first internal mixer speed to 40 rpm, press the top bolt, wait for the temperature of the rubber compound to rise to 150℃, discharge the rubber compound, and obtain a natural rubber carbon black plasticized rubber compound;

[0121] S2, set the second internal mixer speed to 40 rpm, add the natural rubber carbon black plasticized rubber compound, cis-butadiene rubber, the remaining 70% by mass fraction of carbon black N234, zinc oxide, stearic acid, microcrystalline wax, antioxidant 4020, antioxidant RD, and aromatic oil into the second internal mixer, press the top bolt for 30 s; raise the top bolt, keep for 10 s, press the top bolt, wait for the temperature of the rubber compound to rise to 130℃; raise the top bolt, keep for 10 s, press the top bolt, mix to 155℃, reduce the second internal mixer speed to 10 rpm, mix for 50 s, discharge the rubber compound, extrude in an extruder, then wrap the roll and cut the sheet, cool to 40℃, and stop for 24 h, to obtain a master batch rubber compound;

[0122] S3, set the third internal mixer speed to 20 rpm, add the master batch rubber compound, insoluble sulfur OT-20, accelerator NS, and scorch retarder CTP into the third internal mixer, press the top bolt, mix to 90℃, raise the top bolt and keep for 5 s, press the top bolt, mix to 100℃, and discharge to an open mill; raise the roller temperature of the open mill to 70℃, complete the rubber compound turning on the open mill, wrap the roll after the rubber compound turning, cut the sheet, cool to 40℃, and stop for 24 h, to obtain a finished rubber compound, which is a tire rubber composition.

[0123] Comparative Example 2

[0124] This comparative example provides a tire rubber composition comprising the following components by weight:

[0125] Natural rubber 70 parts, cis-butadiene rubber 30 parts, carbon black N234 62 parts, microcrystalline wax 2 parts, zinc oxide 3 parts, stearic acid 1 part, antioxidant 4020 1.5 parts, antioxidant RD 1.5 parts, aromatic oil 4 parts, insoluble sulfur OT-20 1.8 parts, accelerator NS 1.2 parts, scorch retarder CTP 0.1 part;

[0126] The natural rubber is 20# natural rubber (i.e. natural rubber TSR-20);

[0127] The cis-butadiene rubber is Daqing Petrochemical butadiene rubber, model BR9000;

[0128] The preparation method of the above tire rubber composition comprises the following steps:

[0129] S1, set the first internal mixer speed to 55 rpm, put the natural rubber into the first internal mixer, press the top bolt for 60 s; raise the top bolt, add 30% by mass fraction of carbon black N234, press the top bolt, wait for the temperature of the rubber compound to rise to 130℃, raise the top bolt, keep for 20 s, adjust the first internal mixer speed to 40 rpm, press the top bolt, wait for the temperature of the rubber compound to rise to 150℃, discharge the rubber compound, and obtain the natural rubber carbon black plasticized rubber compound;

[0130] S2, set the second internal mixer speed to 40 rpm, add the natural rubber carbon black plasticized rubber compound, cis-butadiene rubber, the remaining 70% by mass fraction of carbon black N234, zinc oxide, stearic acid, microcrystalline wax, antioxidant 4020, antioxidant RD, and aromatic oil into the second internal mixer, press the top bolt for 30 s; raise the top bolt, keep for 10 s, press the top bolt, wait for the temperature of the rubber compound to rise to 130℃; raise the top bolt, keep for 10 s, press the top bolt, mix to 155℃, reduce the second internal mixer speed to 10 rpm, mix for 50 s, discharge the rubber compound, extrude in the extruder, then wrap the roll and cut the sheet, cool to 40℃, and stop for 24 h, to obtain the master batch rubber compound;

[0131] S3, set the third internal mixer speed to 20 rpm, add the master batch rubber compound, insoluble sulfur OT-20, accelerator NS, and scorch retarder CTP into the third internal mixer, press the top bolt, mix to 90℃, raise the top bolt and keep for 5 s, press the top bolt, mix to 100℃, and discharge to the open mill; raise the open mill roller temperature to 70℃, complete the rubber compound turning on the open mill, wrap the roll after the rubber compound turning, cut the sheet, cool to 40℃, and stop for 24 h, to obtain the finished rubber compound, which is the tire rubber composition.

[0132] The weight parts of each raw material in the tire rubber composition in the above examples 1-4 and comparative examples 1-2 are shown in Table 1.

[0133] Table 1-Weight parts of each raw material in the rubber composition of different examples and comparative examples

[0134]

[0135]

[0136] The rubber compositions prepared in the above Examples 1-4 and Comparative Examples 1-2 were tested for performance, mainly including basic physical and mechanical properties, wear resistance, flex resistance, tear resistance, electrical conductivity, and thermal conductivity, and the test results are shown in Table 2 below.

[0137] Table 2 - Performance of rubber compositions prepared in different examples and comparative examples

[0138]

[0139] In the above examples, the 100% modulus, 300% modulus, tensile strength, and elongation at break were tested according to GB / T528-2009; the tear strength was tested according to GB / T529-2009; the density was tested according to GB / T533-2009; the hardness was tested according to GB / T531.1-2009; the bottom temperature rise, the middle temperature rise, and the compression set were tested according to GB / T1687.3-2016; the Akron abrasion was tested according to GB / T16-2014; the flex cracking was tested according to GB / T13934-2006; the volume resistance and the volume resistivity were tested according to GB / T31838.2-2019; and the thermal conductivity at 60°C was tested according to the Laser Flash Analysis laser flash method thermal conductivity analysis method.

[0140] As can be seen from Table 2, compared with the ordinary natural rubber and butadiene rubber formulations in Comparative Examples 1-2, the present application uses No. 1 smoked sheet rubber as the main component, and uses neodymium butadiene rubber and solution-polymerized styrene-butadiene rubber, uses N134 carbon black and bio-based white carbon black, and has a higher physical and mechanical strength, a higher tear strength, a lower heat generation, a better wear resistance, and a better flex resistance. The volume resistance of the tire tread rubber prepared by partially replacing carbon black with conductive carbon black is significantly reduced.

[0141] Figure 1 The tensile strength of the rubber composition prepared in Examples 1-4 and Comparative Examples 1-2 for tires was changed.

[0142] Figure 2 The middle temperature rise of the rubber composition prepared in Examples 1-4 and Comparative Examples 1-2 for tires was changed.

[0143] Figure 3 The volume resistance of the rubber composition prepared in Examples 1-4 and Comparative Examples 1-2 for tires was changed.

[0144] Figure 4Akron wear changes of the tire rubber compositions prepared in Examples 1-4 and Comparative Examples 1-2.

[0145] Figure 5 The change in thermal conductivity at 60°C is shown for the tire rubber compositions prepared in Examples 1-4 and Comparative Examples 1-2.

[0146] from Figures 1 to 5 As can be seen, the tensile strength of the rubber compositions in Examples 1-4 is 1.4-2.7 MPa higher than that in Comparative Examples 1-2, and the physical and mechanical properties are improved by 6-12%. The temperature rise in the middle part of the rubber compositions in Examples 1-4 is 5-15°C lower than that in Comparative Examples 1-2. The reduction in heat generation ensures that the material will not be damaged prematurely due to heat aging during tire use. The volume resistivity of the rubber compositions in Examples 1-4 is lower than that in Comparative Examples 1-2, especially the volume resistivity of the rubber compositions in Examples 1-3, which is reduced by 40%-71% compared with Comparative Examples 1-2. The antistatic properties of the tires are greatly improved, preventing the accumulation of static electricity during equipment use and thus avoiding safety accidents. The Akron abrasion of the rubber compositions in Examples 1-4 is reduced by 20%-25% compared with Comparative Examples 1-2. The improved abrasion performance makes the tires more wear-resistant and extends their service life. The thermal conductivity of the rubber compositions in Examples 1-4 at 60℃ is increased by 13%-23% compared with Comparative Examples 1-2. The increased thermal conductivity can dissipate the heat accumulated during use in a timely manner, preventing the tire from failing due to performance degradation caused by heat accumulation inside the tire.

[0147] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rubber composition for tires, characterized by, The following components by weight are included: Tobacco sheet glue 60 parts, solution polymerized styrene butadiene rubber 10 parts, neodymium-based butadiene rubber 30 parts, rice husk source bio-based white carbon black 8 parts, carbon black N134 54 parts, V72 conductive carbon black 8 parts, silane coupling agent Si69 1.6 parts, microcrystalline wax 2 parts, tear-resistant resin 2 parts, zinc oxide 8 parts, stearic acid 1 part, antioxidant 4020 1.5 parts, antioxidant RD 1.5 parts, insoluble sulfur OT-20 1.8 parts, accelerator NS 1.2 parts, anti-scorching agent CTP 0.1 part; The tobacco sheet glue is Indonesia No. 1 tobacco sheet glue RSS1, and the molecular weight of the tobacco sheet glue is 10 6 ~ 10 7 ; The solution polymerized styrene butadiene rubber is functionalized solution polymerized styrene butadiene rubber SSBR72612F, and the mass content of styrene in the solution polymerized styrene butadiene rubber is 20% to 22%; The neodymium-based butadiene rubber is neodymium-based butadiene rubber BR9101, and the mass content of cis in the neodymium-based butadiene rubber is greater than 98%; The bio-based white carbon black is rice husk source bio-based white carbon black; The tear-resistant resin is dicyclopentadiene resin KPE-F6115; The preparation method of the tire rubber composition includes the following steps: The first mixer speed is set to 50-60 rpm, the tobacco sheet glue is put into the first mixer, and the top jack is pressed for 60-70 s; the top jack is raised, and the carbon black with a mass fraction of 30-40% is added, the top jack is pressed, and the temperature of the rubber compound is raised to 130-140℃, the top jack is raised, and the temperature is maintained for 20-30 s, the first mixer speed is adjusted to 40-50 rpm, the top jack is pressed, the temperature of the rubber compound is raised to 150-155℃, the rubber compound is discharged, and the tobacco sheet glue carbon black plasticized rubber is obtained; The second mixer speed is set to 40-45 rpm, the tobacco sheet glue carbon black plasticized rubber, the neodymium-based butadiene rubber, the solution polymerized styrene butadiene rubber, the remaining carbon black, the bio-based white carbon black, the conductive carbon black, the zinc oxide, the stearic acid, the silane coupling agent, the microcrystalline wax, the antioxidant, and the tear-resistant resin are added to the second mixer, the top jack is pressed for 30-40 s; the top jack is raised, and the temperature is maintained for 10-20 s, the top jack is pressed, and the temperature of the rubber compound is raised to 130-140℃; the top jack is raised, and the temperature is maintained for 10-20 s, the top jack is pressed, and the mixing temperature is 153-155℃, the second mixer speed is reduced to 5-10 rpm, the mixing time is 50-60 s, the rubber compound is discharged, and then the rubber compound is extruded in an extruder, wrapped on a roller, cooled to 40-45℃, and stored for 8-24 h to obtain a master batch rubber compound; The third mixer speed is set to 15-20 rpm, the master batch rubber compound, the insoluble sulfur, the accelerator, and the anti-scorching agent are added to the third mixer, the top jack is pressed, the mixing temperature is 90-100℃, the top jack is raised and maintained for 5-10 s, the top jack is pressed, the mixing temperature is 100-110℃, and the rubber compound is discharged to an open mill; the roller temperature of the open mill is raised to 70-80℃, the rubber compound is turned over on the open mill, wrapped on a roller after the rubber compound is turned over, and then discharged, cooled to 40-45℃, and stored for 8-24 h to obtain a finished rubber compound, which is the tire rubber composition.

2. The method for producing a rubber composition for tires according to Claim 1, characterized by, The following steps are included: The first speed of the mixer is set to 50-60 rpm, and the tobacco sheet glue is added into the first mixer, and the top bolt is pressed for 60-70 s; the top bolt is raised, and 30-40% of the carbon black by mass fraction is added, and the top bolt is pressed, and the glue temperature is raised to 130-140℃, the top bolt is raised, and is maintained for 20-30 s, the first speed of the mixer is adjusted to 40-50 rpm, the top bolt is pressed, and the glue temperature is raised to 150-155℃, the glue is discharged, and the tobacco sheet glue carbon black plasticizing glue is obtained; The second speed of the mixer is set to 40-45 rpm, and the tobacco sheet glue carbon black plasticizing glue, neodymium butadiene rubber, solution polymerized butadiene rubber, the remaining carbon black, bio-based white carbon black, conductive carbon black, zinc oxide, stearic acid, silane coupling agent, microcrystalline wax, antioxidant, tear-resistant resin are added into the second mixer, and the top bolt is pressed for 30-40 s; the top bolt is raised, and is maintained for 10-20 s, the top bolt is pressed, and the glue temperature is raised to 130-140℃; the top bolt is raised, and is maintained for 10-20 s, the top bolt is pressed, and is mixed to 153-155℃, the second speed of the mixer is reduced to 5-10 rpm, and is mixed for 50-60 s, the glue is discharged, and is extruded in the extruder, then is wrapped on the roller, and is cooled to 40-45℃, and is stopped for 8-24 h, and the master glue mixing glue is obtained; The third speed of the mixer is set to 15-20 rpm, and the master glue mixing glue, insoluble sulfur, accelerator, and anti-scorching agent are added into the third mixer, and the top bolt is pressed, and is mixed to 90-100℃, the top bolt is raised and is maintained for 5-10 s, the top bolt is pressed, and is mixed to 100-110℃, and is discharged to the open mill; the roller temperature of the open mill is raised to 70-80℃, and the glue is turned on the open mill, and after the glue is turned and wrapped on the roller, the sheet is discharged, and is cooled to 40-45℃, and is stopped for 8-24 h, and the final glue is obtained, which is the rubber composition for tires.

3. Use of the rubber composition for tires according to claim 1 or the rubber composition for tires prepared by the preparation method of claim 2 in preparing a tire for a driverless transfer vehicle.

Images