Low-rolling-resistance base rubber material for all-steel radial tire and preparation method of low-rolling-resistance base rubber material

Abstract

The invention relates to a low-rolling-resistance base rubber material for an all-steel radial tire and a preparation method of the low-rolling-resistance base rubber material, in particular to a method for reducing heat generated by a base formula and optimizing the preparation method of the low-rolling-resistance base rubber material. The low-rolling-resistance base rubber material for the all-steel radial tire comprises the following components in parts by weight: 100 parts of natural rubber, 5-12 parts of carbon black, 35-45 parts of white carbon black, 3.5-4.5 parts of a silane coupling agent, 1.5-3.5 parts of an anti-aging agent, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of m-methyl methacrylate, 1-3 parts of sulfur powder, 1-3 parts of an accelerant and 0.1-0.3 part of a scorch retarder. Compared with the prior art, the purpose of reducing heat generated by a base formula is achieved by increasing the parts of the white carbon black and using the m-methyl methacrylate resin, and the rolling resistance is reduced while the abrasion performance of the upper-layer tread is not changed.

Description

Technical Field

[0001] The invention relates to the technical field of tire preparation, and in particular to a low rolling resistance base rubber material for an all-steel radial tire and a preparation method thereof. Background Art

[0002] Studies have shown that 20% to 30% of the fuel consumption of passenger car tires is caused by tire rolling resistance. Therefore, reducing the rolling resistance of tires can greatly improve the energy conservation and emission reduction effects of road traffic. With the implementation of the European labeling law, access requirements for the tire market have been proposed, setting a minimum limit for tire rolling resistance. With the development of the domestic market, OEMs have put forward higher requirements for rolling resistance. The difficulty lies in the fact that improving rolling resistance may affect other parameters such as wear and wet road grip. The solution to reduce rolling resistance this time is to reduce the heat generated at the base of the tread, thereby reducing the rolling resistance of the tire while keeping the various properties of the upper tread of the tire unchanged.

[0003] The tread of a tire accounts for more than 50% of the rolling resistance, making it the largest contributor to rolling resistance among all components. The tread consists of an upper tread and a base. The upper tread mainly provides wear and wet grip, while the base mainly generates heat. Therefore, inventing a base formula with lower heat generation is a key technical issue in achieving reduced tire rolling resistance. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a low rolling resistance base rubber material for an all-steel radial tire and a preparation method thereof, so as to meet the market requirement that the tire rolling resistance reaches Class B (≤4.5) without affecting the tire wear and wet performance.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The first aspect of the present invention provides a low rolling resistance base rubber material for an all-steel radial tire, comprising the following components in parts by weight:

[0007] 100 parts of natural rubber, 5-12 parts of carbon black, 35-45 parts of white carbon black, 3.5-4.5 parts of silane coupling agent, 1.5-3.5 parts of antioxidant, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of meta-methyl resin, 1-3 parts of sulfur powder, 1-3 parts of accelerator, and 0.1-0.3 parts of scorch retarder.

[0008] Further, the following components are included in parts by weight:

[0009] 100 parts of natural rubber, 7 parts of carbon black, 40 parts of white carbon black, 4.0 parts of silane coupling agent, 1.5 parts of stearic acid, 3.6 parts of zinc oxide, 1 part of tackifying resin, 2 parts of antioxidant, 1.2 parts of meta-methyl resin, 2.3 parts of accelerator, 2.4 parts of sulfur powder, and 0.2 parts of scorch retarder.

[0010] Furthermore, the silane coupling agent is Si-69.

[0011] Furthermore, the carbon black has an iodine absorption value of 32-95 g / kg, an oil absorption value of 60-120 ml / 100 g, and a nitrogen adsorption value of NSA of 50-100 m 2 / g.

[0012] Furthermore, the white carbon black is precipitated white carbon black or highly dispersed white carbon black;

[0013] Furthermore, the meta-formaldehyde resin is resorcinol formaldehyde resin.

[0014] Furthermore, the tackifying resin is octylphenol formaldehyde tackifying resin.

[0015] Furthermore, the antioxidant is selected from one or more of antioxidant 4020, antioxidant RD, and protective wax;

[0016] Furthermore, the accelerator is selected from a mixture of one or more of accelerator TBBS, accelerator DPG, and accelerator TBzTD.

[0017] Furthermore, the anti-scorching agent is selected from a mixture of one or more of N-chloroformylthio-4-propylene-dicarboximide, alkyl dithiophosphate zinc salt, N-cyclohexylthiophthalimide, N-cyclohexylthiophthalimide, and N-nitrosodiphenylamine.

[0018] A second aspect of the present invention provides a method for preparing the low rolling resistance base rubber material of the all-steel radial tire as described above, comprising the following steps:

[0019] S1: rolling the natural rubber in an internal mixer, using a four-sided shearing rotor, adjusting different temperatures and speeds, completing basic mixing to obtain a basic mixed rubber;

[0020] S2: Mix the base rubber compound with carbon black, and continue to prepare a masterbatch in an internal mixer. Similarly, adjust the temperature and speed to obtain a masterbatch.

[0021] S3: Add the first-stage masterbatch, white carbon black, silane coupling agent, antioxidant, stearic acid and resin into the internal mixer, use a six-sided high-efficiency shearing rotor, and after a careful mixing process, obtain the second-stage masterbatch;

[0022] S4: adding the second-stage masterbatch, sulfur, accelerator, and scorch retarder into an internal mixer and mixing them in the internal mixer to obtain a first-stage final mix;

[0023] S5: The first-stage final rubber mix is ​​mixed with the anti-scorching agent, and mixed and discharged in an internal mixer to obtain the second-stage final rubber mix, which is the low rolling resistance base rubber material of the all-steel radial tire.

[0024] Furthermore, S1 specifically includes:

[0025] Plastic: Add natural rubber into the internal mixer for rolling. The internal mixer adopts a four-sided shearing type rotor with a speed of 50 rpm. Press the top bolt and mix for 30 seconds, lift the top bolt for cleaning, press the top bolt and mix to 150℃, lift the top bolt for cleaning, adjust the speed of the internal mixer to 40 rpm, press the top bolt and mix to 170℃, lift the top bolt, open the unloading door to discharge the rubber, and open the mixer to discharge the sheets.

[0026] Furthermore, S2 specifically includes:

[0027] First stage masterbatch: Add plastic and carbon black into internal mixer for rolling. The internal mixer adopts four-sided shearing rotor with a speed of 50 rpm. Press the top bolt and mix for 25 seconds. Raise the top bolt for cleaning. Press the top bolt and mix to 145℃. Raise the top bolt for cleaning. Adjust the speed of internal mixer to 35 rpm. Press the top bolt and mix to 163℃. Raise the top bolt, open the unloading door to discharge rubber, open the mixer to discharge sheets, and obtain first stage masterbatch.

[0028] Furthermore, S3 specifically includes:

[0029] Second-stage masterbatch: Add the first-stage masterbatch, white carbon black, silane coupling agent, antioxidant, stearic acid and resin into the internal mixer. The internal mixer adopts a hexagonal high-efficiency shearing rotor with a speed of 50 rpm. Press the top bolt and mix for 30 seconds. Raise the top bolt, open the feeding door and add zinc oxide. The speed is 40 rpm, press the top bolt and mix to 140°C. Raise the top bolt for cleaning and keep it for 20 seconds. Adjust the speed of the internal mixer to 20 rpm, press the top bolt and mix to 154°C. Raise the top bolt, open the unloading door to discharge the rubber, and open the mixer to get the second-stage masterbatch.

[0030] Furthermore, S4 specifically includes:

[0031] Stage 1 final mixing: Add stage 2 masterbatch, sulfur, accelerator and anti-scorch agent into internal mixer. The internal mixer has a four-sided shearing rotor and a speed of 28 rpm. Press the top plug and mix for 25 seconds. Raise the top plug for cleaning. Keep for 10 seconds. Press the top plug and mix for 30 seconds. Raise the top plug for cleaning. Adjust the speed of the internal mixer to 20 rpm. Press the top plug and mix to 100°C. Raise the top plug to discharge the rubber. Open the unloading door to discharge the rubber. Open the mixer to discharge the rubber to obtain the stage 1 final mixing.

[0032] Furthermore, S5 specifically includes:

[0033] Second stage final mixing: Add the first stage final mixing rubber and anti-scorch agent into the internal mixer. The internal mixer adopts a four-sided shearing type rotor with a speed of 25 rpm. Press the top plug to mix for 30 seconds, raise the top plug to clean, keep for 10 seconds, press the top plug to mix for 40 seconds, raise the top plug to discharge the rubber, open the unloading door to discharge the rubber, and open the mixer to discharge the sheets to obtain the second stage final mixing rubber.

[0034] Compared with the prior art, the technical advantages of the present invention are:

[0035] 1) The heat generation of the formula is effectively reduced by the coordinated use of high-fraction white carbon black and meta-phenolic resin. White carbon black, as a highly efficient reinforcing agent, can improve the mechanical properties and wear resistance of the rubber, while having low rolling resistance. The meta-phenolic resin used is a phenolic resin that can improve the viscosity and heat resistance of the rubber. The combination of the two reduces heat generation while ensuring that the physical and mechanical properties of the tire are not reduced.

[0036] 2) The present invention uses a silane coupling agent Si-69, which can promote the bonding between white carbon black and rubber, further improving the reinforcement effect and wear resistance of the rubber. At the same time, by selecting specific carbon black and white carbon black, as well as optimized meta-methylene resin and tackifying resin, the rubber formula of the present invention has good anti-slip performance and aging resistance while maintaining low rolling resistance.

[0037] 3) In terms of preparation method, the present invention ensures uniform dispersion and full reaction of various components by precisely controlling the temperature and rotation speed during the mixing process and the process of segmented mixing, thereby preparing a low rolling resistance base rubber compound with excellent performance. This meticulous process control helps to improve the stability and consistency of the rubber compound, thereby improving the performance of the final tire product.

[0038] 4) The tire base rubber of the present invention can maintain the wear performance and wet performance of the tire while meeting the requirement of low rolling resistance, thereby achieving comprehensive optimization of tire performance. This improvement in comprehensive performance is of great significance for improving the fuel efficiency and driving safety of automobiles. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with specific embodiments, but is by no means intended to limit the present invention. Features such as preparation methods, materials, structures or composition ratios not explicitly described in this technical solution are considered to be common technical features disclosed in the prior art.

[0040] It should be noted that the m-formaldehyde resin used in the examples and comparative examples is resorcinol formaldehyde resin. The tackifying resin used is octylphenol formaldehyde tackifying resin. The anti-scorch agent is N-chloroformylthio-4-propylene-dicarboximide. The carbon black used has an iodine absorption value of 32-95g / kg, an oil absorption value of 60-120ml / 100g, and a nitrogen adsorption value of NSA50-100m 2 / g.

[0041] Example 1

[0042] In this embodiment, the low rolling resistance base of the all-steel radial tire adopts formula 1, which includes 100 parts of natural rubber, 12 parts of carbon black N326, 35 parts of 175 white carbon black (175GR white carbon black), 3.5 parts of silane coupling agent Si-69, 2 parts of stearic acid, 4 parts of zinc oxide, 1.5 parts of tackifying resin, 2.5 parts of antioxidant 4020, 2.5 parts of meta-methyl resin, 1.8 parts of accelerator TBBS, 2.5 parts of sulfur powder, and 0.1 part of scorch retarder.

[0043] The specific preparation process includes:

[0044] (1) Plastic: Add 100% natural rubber into an internal mixer for rolling. The internal mixer has a four-sided shearing rotor and a speed of 50 rpm. Press the top bolt and mix for 30 seconds. Raise the top bolt for cleaning. Press the top bolt and mix to 150°C. Raise the top bolt for cleaning. Adjust the speed of the internal mixer to 40 rpm. Press the top bolt and mix to 170°C. Raise the top bolt, open the discharge door to discharge the rubber, and open the mixer to discharge the sheets.

[0045] (2) A masterbatch: Add plastic and carbon black to an internal mixer for rolling. The internal mixer has a four-sided shearing rotor and a rotation speed of 50 rpm. Press the top plug and mix for 25 seconds. Raise the top plug for cleaning. Press the top plug and mix to 145°C. Raise the top plug for cleaning. Adjust the internal mixer speed to 35 rpm. Press the top plug and mix to 163°C. Raise the top plug. Open the discharge door to discharge the rubber. Open the mixer to discharge the sheet to obtain a masterbatch.

[0046] (3) Second-stage masterbatch: First-stage masterbatch, white carbon black, silane coupling agent, antioxidant, stearic acid and resin are added to an internal mixer. The internal mixer is a 6-sided high-efficiency shearing rotor. The speed is 50 rpm. The top bolt is pressed and mixed for 30 seconds. The top bolt is raised and the feeding door is opened to add zinc oxide. The speed is 40 rpm. The top bolt is pressed and mixed to 140°C. The top bolt is raised and cleaned. The mixture is kept for 20 seconds. The speed of the internal mixer is adjusted to 20 rpm. The top bolt is pressed and mixed to 154°C. The top bolt is raised and the discharge door is opened to discharge the rubber. The second-stage masterbatch is obtained by discharging the sheet from the mixer.

[0047] (4) First-stage final mixing: Add the second-stage masterbatch, sulfur, accelerator TBBS and anti-scorch agent into an internal mixer. The internal mixer has a 4-sided shearing rotor and a speed of 28 rpm. Press the top plug and mix for 25 seconds. Raise the top plug to clean it. Keep for 10 seconds. Press the top plug and mix for 30 seconds. Raise the top plug to clean it. Adjust the speed of the internal mixer to 20 rpm. Press the top plug and mix to 100°C. Raise the top plug to discharge the rubber. Open the discharge door to discharge the rubber. Open the mixer to discharge the rubber to obtain the first-stage final mixing.

[0048] (5) Second stage final mixing: Add the first stage final mixing rubber and anti-scorch agent into an internal mixer. The internal mixer has a 4-sided shearing rotor and a rotation speed of 25 rpm. Press the top plug to mix for 30 seconds, raise the top plug to clean, keep for 10 seconds, press the top plug to mix for 40 seconds, raise the top plug to discharge the rubber, open the discharge door to discharge the rubber, and open the mixer to discharge the sheet to obtain the second stage final mixing rubber.

[0049] Example 2

[0050] Different from Example 1, the low rolling resistance base of the all-steel radial tire in this embodiment adopts Formula 2, wherein the formula adopted is: 100 parts of natural rubber, 10 parts of carbon black N326, 38 parts of 175 white carbon black, 3.8 parts of silane coupling agent Si-69, 2 parts of stearic acid, 3.5 parts of zinc oxide, 1.2 parts of tackifying resin, 2 parts of antioxidant 4020, 1.2 parts of meta-methyl resin, 2.3 parts of accelerator TBBS, 2.6 parts of sulfur powder, and 0.15 parts of scorch retarder.

[0051] Example 3

[0052] Different from Example 1, the low rolling resistance base of the all-steel radial tire in this embodiment adopts Formula 3, wherein the formula adopted is: 100 parts of natural rubber, 7 parts of carbon black N326, 40 parts of 175 white carbon black, 4.0 parts of silane coupling agent Si-69, 1.5 parts of stearic acid, 3.6 parts of zinc oxide, 1 part of tackifying resin, 2 parts of antioxidant 4020, 1.2 parts of meta-methyl resin, 2.3 parts of accelerator TBBS, 2.4 parts of sulfur powder, and 0.2 parts of scorch retarder.

[0053] Comparative Example 1

[0054] The base formulation of the all-steel radial tire in this comparative example 1 includes 100 parts of natural rubber, 34 parts of carbon black N234, 14 parts of 175 white carbon black, 1.4 parts of silane coupling agent Si-69, 2 parts of stearic acid, 3.6 parts of zinc oxide, 1.0 part of tackifying resin, 2.5 parts of antioxidant, 1.1 parts of accelerator TBBS, 2.0 parts of sulfur powder, and 0.15 parts of scorch retarder.

[0055] Prepared according to the formula of comparative example 1

[0056] (1) Plastic: Add 100% natural rubber into an internal mixer for rolling. The internal mixer has a four-sided shearing rotor and a speed of 50 rpm. Press the top bolt and mix for 30 seconds. Raise the top bolt for cleaning. Press the top bolt and mix to 150°C. Raise the top bolt for cleaning. Adjust the speed of the internal mixer to 40 rpm. Press the top bolt and mix to 170°C. Raise the top bolt, open the discharge door to discharge the rubber, and open the mixer to discharge the sheets.

[0057] (2) Masterbatch: Add plastic, carbon black, white carbon black, silane coupling agent, antioxidant, stearic acid, zinc oxide and resin into an internal mixer for rolling. The internal mixer has a hexagonal shearing rotor and a rotation speed of 50 rpm. Press the top bolt and mix for 25 seconds. Raise the top bolt for cleaning. Press the top bolt and mix to 136°C. Raise the top bolt for cleaning. Adjust the speed of the internal mixer to 25 rpm. Press the top bolt and mix to 153°C. Raise the top bolt. Open the discharge door to discharge the rubber. Open the mixer to discharge the sheet to obtain a masterbatch.

[0058] (3) Final mixing: Add masterbatch, sulfur, accelerator and anti-scorch agent into an internal mixer. The internal mixer has a 4-sided shearing rotor and a rotation speed of 28 rpm. Press the top plug and mix for 25 seconds. Raise the top plug to clean it and keep it for 10 seconds. Press the top plug and mix for 30 seconds. Raise the top plug to clean it. Adjust the speed of the internal mixer to 20 rpm. Press the top plug and mix to 100°C. Raise the top plug to discharge the rubber. Open the discharge door to discharge the rubber. Open the mixer to discharge the rubber to obtain the final mixing.

[0059] The low rolling resistance base rubbers prepared according to four formulations (corresponding to Example 1 and Examples 1 to 3, respectively) were vulcanized at 150° C. for 30 minutes and then subjected to physical property tests. The test results are shown in Table 1.

[0060] Table 1

[0061]

[0062] As can be seen from Table 1, the formula of Comparative Example 1 does not add high-fraction white carbon black, and the heat generation performance is relatively high, so it does not meet the performance requirements of the low rolling resistance base rubber. The embodiment effectively reduces the heat generation phenomenon of the formula through the coordinated use of high-fraction white carbon black and meta-hydroxy resin. White carbon black, as a highly efficient reinforcing agent, can improve the mechanical properties and wear resistance of the rubber, while having a lower rolling resistance. The meta-hydroxy resin used as a phenolic resin can improve the viscosity and heat resistance of the rubber. The combined use of the two can reduce heat generation while ensuring that the physical and mechanical properties of the tire are not reduced. Silane coupling agent Si-69 is used, and this coupling agent can promote the combination between white carbon black and rubber, further improving the reinforcement effect and wear resistance of the rubber. At the same time, by selecting specific carbon black and white carbon black, as well as optimized meta-hydroxy resin and tackifying resin, the rubber formula of the present invention has good anti-wet skid resistance and aging resistance while maintaining low rolling resistance.

[0063] The low rolling resistance base rubbers prepared according to the three formulations (Examples 1 to 3) were used to trial-produce the proposed tires, and the finished tires were subjected to a durable rolling resistance test. The test results are shown in Table 2.

[0064] Table 2

[0065] Finished tire performance Test Standards standard Test Data Durability GB / T4501-2023 ≤47h 107h Rolling resistance performance ISO 28580 ≤6.5 4.39

[0066] It can be seen from Table 2 that the low rolling resistance basic rubber formula prepared by the embodiment of the present invention has physical properties that can meet the requirements of tires, has low heat generation, and meets the market demand for rolling resistance.

[0067] In summary, the mechanism of the present invention is analyzed as follows:

[0068] The invention constructs a reinforcing system using white carbon black + carbon black. By using 35-45 parts of high-portion white carbon black and 1-3 parts of meta-formaldehyde resin in coordination, meta-formaldehyde resin and accelerator are used. The two generate phenolic resin at the vulcanization temperature and form chemical bonds with rubber, thereby improving the tear strength, tensile strength and dynamic performance of the vulcanized rubber, meeting the physical performance requirements of the tread base of the all-steel radial tire and the performance requirements of the machine tool. At the same time, a silane coupling agent is used to perform surface modification to improve the dispersibility of white carbon black in the rubber.

[0069] The key technical feature of the present invention is to construct a reinforcement system using white carbon black and carbon black, and to optimize the performance of the tire base rubber material through the coordinated use of high proportions of white carbon black (35-45 parts) and meta-formaldehyde resin (1-3 parts) and the surface modification effect of the silane coupling agent. Specifically:

[0070] Construction of reinforcement system: By using high proportions of white carbon black and carbon black, the present invention constructs an effective reinforcement system. White carbon black, as an efficient reinforcing agent, can improve the mechanical properties and wear resistance of the rubber compound, while having lower rolling resistance. The addition of carbon black further enhances the strength and wear resistance of the rubber compound.

[0071] However, pure high-content white carbon black and carbon black have defects, so the present invention further makes improvements:

[0072] Surface modification of silane coupling agent: The use of silane coupling agent not only promotes the bonding between silica and rubber, improves the reinforcement effect and wear resistance of the rubber, but also improves the dispersibility of silica in rubber through surface modification. This modification helps to reduce the heat generation of the rubber and improve the fuel efficiency and driving safety of the tire.

[0073] Synergistic effect of meta-formaldehyde resin and accelerator: meta-formaldehyde resin, as a phenolic resin, reacts with accelerator at vulcanization temperature to form phenolic resin, which forms chemical bonds with rubber to improve the tear strength, tensile strength and dynamic properties of the vulcanized rubber. This synergistic effect helps to meet the physical properties and machine tool performance requirements of the tread base of all-steel radial tires.

[0074] The present invention has achieved significant technical progress in reducing the rolling resistance of tires. The compression heat generated by the present invention is only about 10 degrees. This significant improvement is due to the coordinated use of high-fraction white carbon black and meta-methyl resin adopted by the present invention, as well as the surface modification effect of the silane coupling agent. The combination of these components and technical means not only improves the tear strength, tensile strength and dynamic performance of the vulcanized rubber, meets the physical properties and machine tool performance requirements of the tread base of the all-steel radial tire, but also effectively reduces the heat generation phenomenon. Through this optimized formula design, the tire base rubber material of the present invention can reduce energy loss and improve fuel efficiency in actual use, while extending the service life of the tire. This improvement in comprehensive performance is of great significance for improving the fuel efficiency and driving safety of automobiles. In addition, reducing compression heat generation also helps to reduce the risk of thermal damage to the tire when driving at high speed or under load, thereby improving the reliability and durability of the tire.

[0075] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A low rolling resistance base rubber material for an all-steel radial tire, characterized in that: The composition comprises the following components in parts by weight: 100 parts of natural rubber, 5-12 parts of carbon black, 35-45 parts of white carbon black, 3.5-4.5 parts of silane coupling agent, 1.5-3.5 parts of antioxidant, 2-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of meta-methyl resin, 1-3 parts of sulfur powder, 1-3 parts of accelerator, and 0.1-0.3 parts of scorch retarder.

2. The low rolling resistance base rubber material for an all-steel radial tire according to claim 1, characterized in that: The composition comprises the following components in parts by weight: 100 parts of natural rubber, 7 parts of carbon black, 40 parts of white carbon black, 4.0 parts of silane coupling agent, 1.5 parts of stearic acid, 3.6 parts of zinc oxide, 1 part of tackifying resin, 2 parts of antioxidant, 1.2 parts of meta-methyl resin, 2.3 parts of accelerator, 2.4 parts of sulfur powder, and 0.2 parts of scorch retarder.

3. The low rolling resistance base rubber material for an all-steel radial tire according to claim 1, characterized in that: The silane coupling agent is Si-69.

4. The low rolling resistance base rubber material for an all-steel radial tire according to claim 1, characterized in that: The carbon black has an iodine absorption value of 32-95 g / kg, an oil absorption value of 60-120 ml / 100 g, and a nitrogen adsorption value of NSA of 50-100 m 2 / g.

5. The low rolling resistance base rubber material for an all-steel radial tire according to claim 2, characterized in that: The white carbon black precipitated white carbon black or highly dispersed white carbon black; The meta-formaldehyde resin is resorcinol formaldehyde resin; The tackifying resin is a phenolic tackifying resin.

6. The low rolling resistance base rubber material for an all-steel radial tire according to claim 1, characterized in that: The antioxidant is selected from one or more of antioxidant 4020, antioxidant RD, and protective wax; The accelerator is selected from a mixture of one or more of accelerator TBBS, accelerator DPG, and accelerator TBzTD.

7. The low rolling resistance base rubber material for an all-steel radial tire according to claim 1, characterized in that: The anti-scorch agent is selected from a mixture of one or more of N-chloroformylthio-4-propylene-dicarboximide, alkyl dithiophosphate zinc salt, N-cyclohexylthiophthalimide, N-cyclohexylthiophthalimide, and N-nitrosodiphenylamine.

8. A method for preparing a low rolling resistance base rubber compound for an all-steel radial tire as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: rolling the natural rubber in an internal mixer, using a four-sided shearing rotor, adjusting different temperatures and speeds, completing basic mixing to obtain a basic mixed rubber; S2: Mix the base rubber mix with carbon black, and continue to prepare a masterbatch in an internal mixer. Similarly, adjust the temperature and speed to obtain a masterbatch. S3: Add the first-stage masterbatch, white carbon black, silane coupling agent, antioxidant, stearic acid and resin into the internal mixer, use a six-sided high-efficiency shearing rotor, and after a careful mixing process, obtain the second-stage masterbatch; S4: adding the second-stage masterbatch, sulfur, accelerator, and scorch retarder into an internal mixer and mixing them in the internal mixer to obtain a first-stage final mix; S5: The first-stage final rubber mix is ​​mixed with the anti-scorching agent, and mixed and discharged in an internal mixer to obtain the second-stage final rubber mix, which is the low rolling resistance base rubber material of the all-steel radial tire.

9. The method for preparing a low rolling resistance base rubber material for an all-steel radial tire according to claim 8, characterized in that: S1 specifically includes: Plastic: Add natural rubber to the internal mixer for rolling. The internal mixer uses a four-sided shearing rotor with a speed of 50 rpm. Press the top bolt and mix for 30 seconds. Raise the top bolt for cleaning. Press the top bolt and mix to 150°C. Raise the top bolt for cleaning. Adjust the speed of the internal mixer to 40 rpm. Press the top bolt and mix to 170°C. Raise the top bolt, open the discharge door to discharge the rubber, and open the mixer to discharge the sheets. S2 specifically includes: First stage masterbatch: Add plastic and carbon black into internal mixer for rolling. The internal mixer adopts four-sided shearing rotor, with a speed of 50 rpm, press the top bolt to mix for 25 seconds, lift the top bolt to clean, press the top bolt to mix to 145℃, lift the top bolt to clean, adjust the speed of internal mixer to 35 rpm, press the top bolt to mix to 163℃, lift the top bolt, open the discharge door to discharge rubber, open the mixer to discharge sheets, and obtain first stage masterbatch; S3 specifically includes: Second-stage masterbatch: Add the first-stage masterbatch, white carbon black, silane coupling agent, antioxidant, stearic acid and resin into the internal mixer. The internal mixer adopts a hexagonal high-efficiency shearing rotor with a speed of 50 rpm. Press the top bolt and mix for 30 seconds. Raise the top bolt, open the feeding door and add zinc oxide. The speed is 40 rpm, press the top bolt and mix to 140°C. Raise the top bolt for cleaning and keep it for 20 seconds. Adjust the speed of the internal mixer to 20 rpm, press the top bolt and mix to 154°C. Raise the top bolt, open the unloading door to discharge the rubber, and open the mixer to get the second-stage masterbatch.

10. The method for preparing a low rolling resistance base rubber material for an all-steel radial tire according to claim 9, characterized in that: S4 specifically includes: Stage 1 final mixing: add stage 2 masterbatch, sulfur, accelerator and anti-scorch agent into internal mixer, which has four-sided shearing rotor and rotates at 28 rpm. Press the top plug and mix for 25 seconds, lift the top plug to clean, keep for 10 seconds, press the top plug and mix for 30 seconds, lift the top plug to clean, adjust the speed of internal mixer to 20 rpm, press the top plug and mix to 100℃, lift the top plug to discharge, open the discharge door to discharge, and open the mixer to discharge sheets to obtain stage 1 final mixing; S5 specifically includes: Second stage final mixing: Add the first stage final mixing rubber and anti-scorch agent into the internal mixer. The internal mixer adopts a four-sided shearing type rotor with a speed of 25 rpm. Press the top plug to mix for 30 seconds, raise the top plug to clean, keep for 10 seconds, press the top plug to mix for 40 seconds, raise the top plug to discharge the rubber, open the unloading door to discharge the rubber, and open the mixer to discharge the sheets to obtain the second stage final mixing rubber.

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