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CN-122011523-A - Tread rubber composition for all-steel truck radial tire driving wheel, driving wheel tread rubber and preparation method thereof

CN122011523ACN 122011523 ACN122011523 ACN 122011523ACN-122011523-A

Abstract

The invention belongs to the technical field of tire sizing material preparation, and relates to a tread rubber composition for an all-steel radial truck tire driving wheel, a driving wheel tread rubber and a preparation method thereof, wherein the tread rubber composition comprises 50-75 parts of natural rubber, 15-25 parts of butadiene-isoprene rubber, 10-25 parts of MGA-30 rubber, 30-40 parts of carbon black, 10-20 parts of ultra-high specific surface area white carbon black, 1.5-3 parts of stearic acid, 3-5 parts of indirect zinc oxide, 1.2-2.4 parts of liquid silane, 0.4-0.8 part of white carbon black modified dispersing agent, 0.5-2 parts of novel vulcanizing agent, anti-aging agent, protective wax, sulfur powder, accelerator CZ and anti-scorching agent CTP. The tread rubber prepared by the invention is used for all-steel radial truck tire driving wheel tires, remarkably improves the wet skid resistance and wear resistance, reduces rolling resistance, realizes synchronous optimization of vehicle driving safety, wear resistance and fuel saving property, and prolongs the service life.

Inventors

  • LI ANQING
  • LI QUN
  • NIU GUANGXIA

Assignees

  • 有道轮胎有限公司

Dates

Publication Date
20260512
Application Date
20260209

Claims (10)

  1. 1. The tread rubber composition for the driving wheel of the all-steel truck radial tire is characterized by comprising, by weight, 50-75 parts of natural rubber, 15-25 parts of butadiene-isoprene rubber, 10-25 parts of MGA-30 rubber, 30-40 parts of carbon black, 10-20 parts of ultra-high specific surface area white carbon black, 1.5-3 parts of stearic acid, 3-5 parts of indirect zinc oxide, 1-2 parts of an anti-aging agent RD, 1.5-3 parts of an anti-aging agent 4020.5, 1-2 parts of protective wax, 1.2-2.4 parts of liquid silane, 0.4-0.8 part of a white carbon black modified dispersing agent, 1-1.5 parts of sulfur powder, 1-2.0 parts of an accelerator CZ, 0.1-0.4 part of a scorch inhibitor CTP and 0.5-2 parts of a novel vulcanizing agent.
  2. 2. The tread rubber composition according to claim 1, wherein the natural rubber is one or more of a tobacco flake rubber RSS3#, a 10# standard rubber and a 20# standard rubber, and the butyl-isoprene rubber is an iron-based comb-branch butyl-isoprene rubber BIR.
  3. 3. The tread rubber composition according to claim 1, wherein the MGA-30 rubber is a modified natural rubber, and is grafted with methyl methacrylate on a side group of the natural rubber, the grafting ratio is 30±2%, the mooney viscosity MS (1+4) is 100 ℃ or less and 110, and the glass transition temperature is-57 ℃.
  4. 4. The tread band composition of claim 1, wherein the ultra-high specific surface area white carbon black is white carbon black referred to as BET 235±20m 2 /g; The carbon black is selected from carbon black BL109, the N2SA of the carbon black is 140+/-5 m 2 /g, and the DBP oil absorption value is 135+/-5 ml/100 g.
  5. 5. The tread rubber composition as in claim 1, wherein the liquid silane is Si69 in an amount of 12% by weight of ultra-high specific surface area white carbon black; The white carbon black modified dispersant is SL-5048, wherein the mass ratio of the high molecular weight alkylamine to the stearate is 50:50, and the dosage of SL-5048 is 4 percent of the weight part of the white carbon black with the ultrahigh specific surface area; the novel vulcanizing agent is a vulcanizing agent ARC.
  6. 6. The method for producing a tread rubber composition as claimed in any one of claims 1 to 5, comprising the steps of: (1) Weighing the components according to the parts by weight, adding the weighed natural rubber, stearic acid, an anti-aging agent, white carbon black with ultra-high specific surface area, liquid silane, a white carbon black modified dispersant and 1/3 amount of carbon black into an internal mixer, wherein the rotating speed is 50 rpm, the upper ram pressure is 0.45-0.55 MPa, mixing for 30 seconds, cleaning and mixing for 20 seconds, adjusting the rotating speed to 40 rpm, mixing for 30 seconds, discharging rubber, controlling the rubber discharging temperature to be 150-160 ℃, extruding a lower sheet by an extruder, cooling and stacking to obtain a section of masterbatch; (2) Adding the prepared primary masterbatch, weighed butadiene-isoprene rubber, MGA-30 rubber, indirect zinc oxide and the rest 2/3 of carbon black into an internal mixer, regulating the rotating speed to 50 rpm, mixing for 30 seconds, cleaning, mixing for 25 seconds, discharging the rubber, controlling the rubber discharging temperature to be 150-160 ℃, extruding the lower piece by an extruder, cooling and stacking to obtain a secondary masterbatch; (3) Adding the second-stage masterbatch into an internal mixer at the rotating speed of 42 rpm, mixing for 30 seconds, cleaning, mixing for 30 seconds, discharging the masterbatch, controlling the temperature of the discharging to be 150-155 ℃, extruding the masterbatch out of the extruder, cooling and stacking to obtain the third-stage masterbatch; (4) Adding the three-section masterbatch, the weighed sulfur powder, the accelerator CZ, the scorch retarder CTP and the novel vulcanizing agent into an internal mixer, adjusting the rotating speed to 28 rpm, mixing for 30 seconds after cleaning, lifting a top bolt, pressing the top bolt, mixing for 30 seconds, discharging rubber, controlling the rubber discharging temperature to 100-115 ℃, discharging by an open mill, cooling and stacking to obtain final rubber.
  7. 7. An all-steel truck radial tire driving wheel tread rubber, which is characterized in that the driving wheel tread rubber is prepared from the tread rubber composition of any one of claims 1-6.
  8. 8. Use of the tread rubber composition according to any one of claims 1 to 5 or the tread rubber composition produced by the production method according to claim 6 for producing a driving tire.
  9. 9. The use according to claim 8, wherein said tyre is a driving wheel tyre in an all-steel heavy duty radial tyre.
  10. 10. Use of the tread band of claim 7 for the manufacture of a tire for driving an all steel truck radial tire.

Description

Tread rubber composition for all-steel truck radial tire driving wheel, driving wheel tread rubber and preparation method thereof Technical Field The invention belongs to the technical field of preparation of tire sizing materials, and particularly relates to a tread rubber composition for an all-steel truck radial tire driving wheel, a driving wheel tread rubber and a preparation method thereof. Background The all-steel truck radial tire is mainly applied to freight and passenger vehicles and can be divided into guide wheels, driving wheels and trailer wheels according to different mounting positions of the all-steel truck radial tire on the vehicles. The driving wheel is used for transmitting torque output by an engine or an electric motor of the vehicle to the ground through a transmission system (such as a gearbox and a transmission shaft) to generate traction force (friction force) so as to push the vehicle to advance or retreat. The adhesion force between the driving wheel and the road surface directly influences the acceleration efficiency of the vehicle and the performance in the aspects of climbing a slope, grabbing the wet road surface and the like. The performance of the driving wheel is influenced by patterns, namely the tread rubber of the driving wheel is most directly influenced, the tread rubber influences the grip force between the tire and the ground, and particularly under the condition of wet land, the driving safety is directly influenced by insufficient grip force and large braking distance. In addition, the proportion of energy consumption of the driving wheel is obviously higher than that of the guiding wheel and the trailer wheel, and in the 6×4+3t traction trailer, among the energy consumption provided by the tires, the driving wheel accounts for 50%, the trailer wheel accounts for 35% and the guiding wheel accounts for 15%, because the driving wheel is a main acting wheel position and contributes to the rolling resistance of the vehicle the most. The tread rubber accounts for 40-50% of the rolling resistance of the driving wheel, the rolling resistance of the driving wheel is improved mainly from the formula of the tread, and meanwhile, the wear resistance of the driving wheel is the main working wheel position, so that the service life of the driving wheel is determined, and the service time of the driving wheel can be prolonged due to the excellent wear resistance, thereby bringing economic value to customers. When the rolling resistance of the driving wheel is large, the tread rubber is large in heat generation, and when a vehicle runs for a long time, particularly when the ambient temperature is too high in summer, the rubber is aged due to heat generation, shoulder air, crown delamination and even tire burst occur in the tire, and certain potential safety hazards exist. The inventor applies for Chinese patent CN118222016A aiming at the tread rubber formula of the guide wheel, and provides a tread rubber composition special for the guide wheel and a preparation method of the tread rubber of the guide wheel, which are used for reducing the hardness of the tread rubber of the guide wheel, ensuring the abrasion and reducing the heat generation problem of the rubber material of the guide wheel. But have not been designed for tread band formulations for drive wheels. How to reduce the rolling resistance of the driving wheel so as to reduce the oil consumption, reduce the heat generation problem of the tread rubber material of the driving wheel and reduce faults, improve the wet skid resistance, improve the driving safety, ensure the abrasion and prolong the service life of the tire, and is a technical problem which is urgently needed to be solved by the prior art, and is also a devil triangle puzzled in the industry. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to solve the problems in the prior art and provides a tread rubber composition for an all-steel truck radial tire driving wheel, a driving wheel tread rubber and a preparation method thereof, wherein the tread rubber composition is prepared by combining and designing raw materials, according to the distribution characteristics of different materials in rubber, the feeding sequence and mixing temperature are controlled, and the raw rubber, filler and auxiliary agent sectional feeding process is adopted, so that the reactivity in the mixing process and the distribution of the filler in the three raw rubber are ensured. The driving wheel prepared by the invention obviously improves the driving safety of the vehicle, improves the wet skid resistance, prolongs the service life, improves the wear resistance of the tire, reduces the