CN110591171A - Sidewall rubber for all-steel tire and preparation method thereof - Google Patents
Sidewall rubber for all-steel tire and preparation method thereof Download PDFInfo
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- CN110591171A CN110591171A CN201910807067.9A CN201910807067A CN110591171A CN 110591171 A CN110591171 A CN 110591171A CN 201910807067 A CN201910807067 A CN 201910807067A CN 110591171 A CN110591171 A CN 110591171A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0025—Compositions of the sidewalls
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention belongs to the technical field of tire manufacturing, and particularly relates to a sidewall rubber for an all-steel tire and a preparation method thereof. The sidewall rubber material for the all-steel tire comprises the following components in parts by weight: 50.0-70.0 parts of natural rubber, 10.0-35.0 parts of high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, 0.5-2.0 parts of carbon black coupling agent, carbon black, stearic acid, zinc oxide, homogenizing agent, anti-aging agent RD, anti-aging agent 4020, tackifying resin, protective wax, rubber operating oil, sulfenamide accelerator and sulfur. The invention improves the comprehensive performance of the sidewall, especially the flex resistance and crack growth resistance by improving the rubber seeds, reducing the heat generation, reducing the constraint degree of the macromolecular chains of the rubber, improving the flexibility and the like.
Description
Technical Field
The invention belongs to the technical field of tire manufacturing, and particularly relates to a sidewall rubber for an all-steel tire and a preparation method thereof.
Background
Along with the increasing of the national governing overrun overload force and the improving of the national road construction, the damage to the tire tread of the all-steel truck tire is reduced, so that the service life of the tire tread of the all-steel radial tire is continuously prolonged; meanwhile, with the development of economy, the increase of population and the increase of the quantity of motor vehicles, the urban pollution problem is more serious in recent years, precursors such as NOx, CO, VOCs and the like in cities react under proper meteorological conditions to generate ozone, and then great damage can be caused to the tire side; the above changes all place higher demands on the tire sidewall rubber.
The tire side wall mainly plays the effect of protection matrix, buffering external impact, bears great stress, if tired breach appears in the use in the side wall, the inside matrix steel wire of tire is corroded easily by air, moisture to finally lead to the destruction of tire. With the prolonging of the service life of the tire tread and the increasing of urban ozone pollution, the problem of early cracking in the tire side exists in the tire side of the all-steel heavy-duty tire with harsh use conditions, and under the condition that the tread pattern is still deep, the tire has to be replaced, the service life of the tire is seriously shortened, the retreading frequency is influenced, and the waste of resources is caused.
The technical means for improving the aging resistance and flexing resistance of rubber materials and delaying the occurrence of cracks in the prior art comprise the following steps: firstly, saturated rubber such as butyl rubber, butyl reclaimed rubber, halogenated butyl rubber, ethylene propylene diene monomer rubber and the like is used, but the saturated rubber and the unsaturated rubber have the problems of two-phase compatibility and co-vulcanization, so that uneven mixing is easily caused, and a uniform cross-linked network is difficult to form; secondly, the usage amount of the anti-aging agent, especially the usage amount of the antiozonant 4020 and the like is increased, besides the appearance of the tire side is influenced, along with the continuous migration of anti-aging agent micromolecule substances and the continuous cleaning and washing of the tire, once the tire side generates ozone aging cracks, the protection effect of the anti-aging agent is weakened, and the cracks can rapidly develop and extend; thirdly, white carbon black or large-particle-size carbon black is used, the problem of reduction of the bending property of the rubber material due to hardening and brittleness after aging is solved, but the problems of rough surface, easy edge breakage, large porosity, unstable size and the like exist when the tire side rubber material using the white carbon black is extruded, and the mechanical property of the rubber material is sacrificed when the large-particle-size carbon black is used for reducing the heat generation.
Disclosure of Invention
The invention aims to solve the problems of the prior art that the technical means for improving the aging resistance and flexing resistance of rubber materials and delaying the occurrence of cracks have defects, and provides a sidewall rubber for all-steel tires and a preparation method thereof.
The technical scheme of the invention is as follows:
the invention provides a sidewall rubber for an all-steel tire, which comprises the following components in parts by weight:
50.0-70.0 parts of natural rubber, 10.0-35.0 parts of high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, 0.5-2.0 parts of carbon black coupling agent, 30.0-45.0 parts of carbon black, 0.5-2.5 parts of stearic acid, 3.0-5.0 parts of zinc oxide, 1.0-3.0 parts of homogenizing agent, 0.5-2.0 parts of anti-aging agent RD, 40204.0-6.0 parts of anti-aging agent, 1.0-4.0 parts of tackifying resin, 0.5-2.0 parts of protective wax, 2.0-5.0 parts of rubber operating oil, 0.5-1.0 part of sulfenamide accelerator and 1.2-1.8 parts of sulfur.
Preferably, the colloidal particle comprises the following components in parts by weight:
55.0-65.0 parts of natural rubber, 10.0-25.0 parts of high cis-butadiene rubber, 20.0-30.0 parts of high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, 0.8-1.5 parts of carbon black coupling agent, 35.0-40.0 parts of carbon black, 1.0-2.0 parts of stearic acid, 3.5-4.5 parts of zinc oxide, 1.0-3.0 parts of homogenizing agent, 1.0-1.5 parts of anti-aging agent RD, 40204.0-5.0 parts of anti-aging agent, 2.0-3.0 parts of tackifying resin, 1.0-1.5 parts of protective wax, 2.0-5.0 parts of rubber operating oil, 0.8-1.0 part of sulfenamide accelerator and 1.4-1.6 parts of sulfur. Wherein, the crack initiation speed of the natural rubber is high, but the growth speed is low; the high cis-butadiene rubber has slow crack initiation speed but high growth speed; the high cis-butadiene rubber containing the micro-dispersed trans-1, 4 polyisoprene rubber can improve the modulus of rubber materials, correspondingly reduce the using amount of fillers and reduce rolling resistance, and meanwhile, the trans-1, 4 polyisoprene rubber can disperse stress, has high energy required by crack initiation and propagation, and can improve the flexing resistance and crack propagation capacity.
Preferably, the content of the trans-1, 4 polyisoprene rubber in the high cis-butadiene rubber containing the micro-dispersed trans-1, 4 polyisoprene rubber is 10-50%. The trans-1, 4 polyisoprene rubber has good crystallinity, and has high energy required by crack initiation and propagation when being acted by external force, and can improve the flexing resistance and the crack propagation capacity; however, trans-1, 4 polyisoprene rubber is a hard semi-crystalline material, and is difficult to achieve uniform micro-dispersion in softer rubber such as butadiene rubber and the like, so that the uniformity and quality stability of rubber materials are influenced. The invention uses the high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, and the rubber material is prepared by uniformly dispersing nano-scale trans-1, 4 polyisoprene rubber in the butadiene rubber of a rubber matrix in the preparation stage, thereby not only improving the problem of poor compatibility of two-phase blending, but also effectively exerting the advantages of the trans-1, 4 polyisoprene rubber.
Preferably, the cis content of the high-cis-butadiene rubber is not less than 92%, and BR9000 is selected as the high-cis-butadiene rubber.
Preferably, the carbon black coupling agent is a compound having the following formula:
one end of the carbon black coupling agent is aromatic primary amine which can react with acid groups on the surface of the carbon black to modify the surface of the carbon black, and the other end of the carbon black coupling agent is active conjugated olefin which can generate Michael reaction with diene rubber under the environment of alkaline substances such as amines and the like to modify a rubber matrix; the carbon black coupling agent forms chemical bonding between the carbon black and the rubber, so that the interaction between the carbon black and the rubber is enhanced, the self aggregation of the carbon black and the carbon black is reduced, and the lagging and the heat generation of a rubber compound are reduced.
Preferably, the carbon black is one or two of N660 carbon black and N550 carbon black. The carbon black is selected from carbon black with large specific surface area and low structure, preferably N660 carbon black or N550 carbon black or the combination of the two, and the using amount is low, so that the purpose is to reduce the constraint of the carbon black on macromolecular chains, reduce the tension of the macromolecular chains of the rubber and improve the flexing performance.
Preferably, the tackifying resin is acetylene type tert-butyl phenolic tackifying resin KORESIN which has high viscosity retention rate under high and low temperature and humid and hot conditions and has lower heat build-up than common tert-butyl phenolic tackifying resins.
Preferably, the sulfenamide accelerator is dicyclohexyl-2-benzothiazole sulfenamide DZ and N-tertiary butyl-2-benzothiazole sulfenamide NS. The crosslinking density of vulcanized rubber prepared by the accelerator DZ is reduced due to the fact that a group connected with an amino group of the accelerator DZ is large, and under a certain strain condition, the reduction of the crosslinking density weakens the tension of each molecular chain and can improve the flexibility of rubber, and the using amount of the accelerator DZ is 0.6-0.9 parts; the accelerator NS has long scorching time and high vulcanization speed, improves the vulcanization speed of rubber, and has the dosage range of 0.1-0.4 part.
The invention also provides a preparation method of the sidewall rubber for the all-steel tire, which comprises the following steps:
first-stage mixing: adding natural rubber, 15-25 parts of carbon black and a carbon black coupling agent into an internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt, mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 20s, opening a discharge gate for rubber discharge, controlling the rubber discharge temperature, discharging sheets of an open mill, cooling and stacking to obtain a section of masterbatch; wherein the rotating speed of the internal mixer is 50 r/min, and the rubber discharging temperature is controlled to be 140-155 ℃;
and (3) second-stage mixing: adding a first-stage masterbatch into an internal mixer, adding high-cis-butadiene rubber, high-cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, residual carbon black, an anti-aging agent, stearic acid, tackifying resin, a homogenizing agent, protective wax and rubber operating oil, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 25s, opening a discharge gate for discharging rubber, controlling the rubber discharging temperature, opening a mixer for discharging, cooling and building stack to obtain a second-stage masterbatch; wherein the rotating speed of the internal mixer is 50 r/min, and the rubber discharging temperature is controlled to be 150-155 ℃;
three-stage mixing: adding the two-section masterbatch into an internal mixer, pressing a top bolt for mixing for 35s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 35s, opening a discharging door for discharging rubber, controlling the rubber discharging temperature, discharging a piece below the open mixer, cooling and stacking to obtain three-section masterbatch; wherein the rotating speed of the internal mixer is 50 r/min, and the rubber discharging temperature is controlled to be 150-155 ℃;
and (3) final refining: adding the three-section master batch, sulfur, an accelerator and zinc oxide into an internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 30s, lifting the top bolt, pressing the top bolt for mixing for 20s, lifting the top bolt, discharging rubber by opening a discharging door, controlling the rubber discharging temperature, discharging sheets by opening the mixer, cooling and stacking; wherein the rotating speed of the internal mixer is 28 r/min, and the rubber discharge temperature is controlled to be 95-105 ℃. The zinc oxide is added in the final refining stage, so that the influence on the carbon black-carbon black coupling agent-rubber bridge-bonding reaction can be reduced.
The invention has the beneficial effects that:
the invention provides a sidewall rubber for an all-steel tire and a preparation method thereof, which adopts high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber by improving rubber seeds, on the basis of keeping the original modulus, the filler part is reduced, the rubber content is improved, the binding degree of the filler to the rubber macromolecular chain is reduced, meanwhile, the carbon black coupling agent is used for modifying the rubber matrix and the carbon black, the interaction between the rubber and the carbon black is enhanced, the self aggregation of the filler is reduced, the self heat generation of the rubber material is reduced, the adverse effect of hysteresis on aging is reduced, the flexing resistance and crack resistance growth capacity of the rubber material is enhanced, the fatigue and crack resistance of the tire side at high driving mileage or the retreaded tire can be effectively improved, the service life of the tire is prolonged, and the tire side rubber is particularly suitable for being used as the tire side rubber of the all-steel radial tire which has higher requirement on the fatigue performance and can be retreaded.
Detailed Description
The technical solutions of the present invention will be described in detail and fully with reference to the following specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For a further understanding of the present invention, reference will now be made in detail to the following examples.
Example 1
The composition of the sidewall rubber is shown in table 1, and the preparation method is as follows:
first-stage mixing: adjusting the rotating speed of a GK400 internal mixer to 50 r/min, adding natural rubber, 20 parts of carbon black and a carbon black coupling agent, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt, mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 20s, discharging rubber at a discharging door, controlling the rubber discharging temperature to be 145 ℃, discharging a sheet from an open mill, cooling and stacking to obtain a section of master batch;
and (3) second-stage mixing: adjusting the rotation speed of a GK400 internal mixer to 50 r/min, adding a section of master batch, high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene, residual carbon black, an anti-aging agent, stearic acid, tackifying resin, a homogenizing agent, protective wax and rubber operating oil into the internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 25s, discharging rubber at a discharging door, controlling the rubber discharging temperature to be 150 ℃, discharging rubber from a lower sheet of the internal mixer, cooling and building a stamp to obtain a second section of master batch;
three-stage mixing: adjusting the rotation speed of a GK400 internal mixer to 50 r/min, adding the two-stage masterbatch into the internal mixer, pressing a top bolt for mixing for 35s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 35s, discharging rubber from a discharging door, controlling the rubber discharging temperature to be 150 ℃, discharging the rubber from a lower sheet of the internal mixer, cooling and stacking to obtain the three-stage masterbatch;
and (3) final refining: adjusting the rotation speed of a GK255 internal mixer to 28 r/min, adding three-section master batch, sulfur, an accelerant and zinc oxide into the internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 30s, lifting the top bolt, pressing the top bolt for mixing for 20s, lifting the top bolt, discharging rubber from a discharge door, controlling the rubber discharging temperature to be 100 ℃, discharging a sheet from the internal mixer, and cooling and building the block.
Example 2
The composition of the sidewall rubber is shown in table 1, and the preparation method is as follows:
first-stage mixing: adjusting the rotating speed of a GK400 internal mixer to 50 r/min, adding natural rubber, 15 parts of carbon black and a carbon black coupling agent, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt, mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 20s, discharging rubber at a discharging door, controlling the rubber discharging temperature to be 150 ℃, discharging a sheet from an open mill, cooling and stacking to obtain a section of master batch;
and (3) second-stage mixing: adjusting the rotation speed of a GK400 internal mixer to 50 r/min, adding a section of master batch, high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene, residual carbon black, an anti-aging agent, stearic acid, tackifying resin, a homogenizing agent, protective wax and rubber operating oil into the internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 25s, discharging rubber at a discharging door, controlling the rubber discharging temperature to be 155 ℃, discharging rubber from a lower sheet of the internal mixer, cooling and building a stamp to obtain a second section of master batch;
three-stage mixing: adjusting the rotation speed of a GK400 internal mixer to 50 r/min, adding the two-stage masterbatch into the internal mixer, pressing a top bolt for mixing for 35s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 35s, discharging rubber from a discharging door, controlling the rubber discharging temperature to be 155 ℃, discharging the rubber from a lower sheet of the internal mixer, cooling and stacking to obtain the three-stage masterbatch;
and (3) final refining: adjusting the rotation speed of a GK255 internal mixer to 28 r/min, adding the three-section master batch, sulfur, an accelerator and zinc oxide into the internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 30s, lifting the top bolt, pressing the top bolt for mixing for 20s, lifting the top bolt, discharging rubber from a discharge door, controlling the rubber discharging temperature to be 105 ℃, discharging the rubber from the lower part of the internal mixer, and cooling and building the block.
Example 3
The composition of the sidewall rubber is shown in table 1, and the preparation method is as follows:
first-stage mixing: adjusting the rotating speed of a GK400 internal mixer to 50 r/min, adding natural rubber, 25 parts of carbon black and a carbon black coupling agent, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt, mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 20s, discharging rubber at a discharging door, controlling the rubber discharging temperature to be 140 ℃, discharging a sheet from an open mill, cooling and stacking to obtain a section of master batch;
and (3) second-stage mixing: adjusting the rotation speed of a GK400 internal mixer to 50 r/min, adding a section of master batch, high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene, residual carbon black, an anti-aging agent, stearic acid, tackifying resin, a homogenizing agent, protective wax and rubber operating oil into the internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 25s, discharging rubber at a discharging door, controlling the rubber discharging temperature to be 153 ℃, discharging rubber from a lower sheet of the internal mixer, cooling and building a stamp to obtain a second section of master batch;
three-stage mixing: adjusting the rotation speed of a GK400 internal mixer to 50 r/min, adding the two-stage masterbatch into the internal mixer, pressing a top bolt for mixing for 35s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 35s, discharging rubber from a discharging door, controlling the rubber discharging temperature to be 153 ℃, discharging the rubber from a lower sheet of the internal mixer, cooling and stacking to obtain the three-stage masterbatch;
and (3) final refining: adjusting the rotation speed of a GK255 internal mixer to 28 r/min, adding the three-section master batch, sulfur, an accelerator and zinc oxide into the internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 30s, lifting the top bolt, pressing the top bolt for mixing for 20s, lifting the top bolt, discharging rubber from a discharge door, controlling the rubber discharging temperature to be 95 ℃, discharging the rubber from the lower part of the internal mixer, and cooling and building the block.
Comparative example
The composition of the sidewall compound is shown in Table 1, and the preparation method is the same as in examples 1-3.
TABLE 1 sidewall stock compositions and weight fractions for examples 1-3 and comparative examples
| Composition of sizing material | Example 1 | Example 2 | Example 3 | Comparative example |
| Natural rubber | 55.0 | 65.0 | 60.0 | 55.0 |
| BR9000 | 35.0 | 15.0 | 10.0 | 45.0 |
| TPBR40 | 15.0 | / | / | / |
| TPBR30 | / | 20.0 | / | / |
| TPBR20 | / | / | 30.0 | / |
| Carbon Black N375 | / | / | / | 45 |
| Carbon Black N550 | 40.0 | / | 10.0 | / |
| Carbon Black N660 | / | 37.0 | 25.0 | / |
| Carbon black coupling agent | 0.8 | 1.0 | 1.2 | / |
| Stearic acid | 2.0 | 1.5 | 1.0 | 2.0 |
| Zinc oxide | 3.5 | 4.0 | 4.5 | 3.5 |
| Tert-butyl tackifying resins | / | / | / | 3.0 |
| KORESIN | 3.0 | 2.5 | 2.0 | / |
| Rubber processing oil | 2.0 | 3.0 | 3.0 | 2.0 |
| Antiager RD | 1.0 | 1.2 | 1.5 | 1.5 |
| Anti-aging agent 4020 | 5.0 | 4.5 | 4.0 | 4.0 |
| Protective wax | 1.8 | 1.6 | 1.5 | 1.0 |
| Accelerator NS | 0.25 | 0.2 | 0.2 | 0.8 |
| Accelerant DZ | 0.7 | 0.75 | 0.8 | / |
| Sulfur | 1.4 | 1.5 | 1.6 | 1.5 |
Wherein TPBR40, TPBR30 and TPBR20 are products of Tsingtao Kangxiang science and technology ltd, and respectively represent that the content of trans-1, 4-polyisoprene is 40%, the content of trans-1, 4-polyisoprene is 30% and the content of trans-1, 4-polyisoprene is 20%.
Test examples
The basic physical properties, flex resistance after aging and crack growth performance of the compounds were tested for examples 1-3 and comparative examples, and the test results are shown in tables 2, 3, and 4, respectively:
TABLE 2 basic physical Properties of sidewall compounds of examples 1-3 and comparative examples
Wherein tan delta @60 ℃ is a GABO dynamic thermo-mechanical analyzer test result, and the test conditions are a tensile mode, static strain of 7%, dynamic strain of 0.25%, frequency of 10Hz and temperature of 20-80 ℃.
It is considered that the rolling resistance of vulcanized rubber has a good correlation with the loss factor tan δ of rubber at 60 ℃. The smaller the value of tan. delta. at around 60 ℃, the lower the heat generation of the vulcanized rubber and the smaller the rolling resistance. It can be seen that the example formulation vulcanizates, DMA tan δ @60 ℃, all exhibit lower rolling resistance.
TABLE 3 sidewall compounds of examples 1-3 and comparative examples resistance to flex after aging
The method for testing the deflection and the judgment standard meet the national standard GBT13934-2006 vulcanized rubber or thermoplastic rubber deflection crack and crack growth determination (Deshaxi subtype).
As can be seen from the aged flex ratings, the examples exhibited more flex times per vent rating than the comparative formulations, indicating that the example formulations exhibited relatively superior flex performance.
TABLE 4 sidewall compound split growth Performance test of examples 1-3 and comparative examples
The crack growth test method and the judgment standard meet the national standard GBT13934-2006 vulcanized rubber or thermoplastic rubber flex cracking and crack growth determination (Desmo subtype).
As can be seen from the post-aging flex rating, the example exhibited a slower crack growth rate and improved crack growth resistance compared to the comparative example.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the scope of the present invention should be included in the patent protection scope of the present invention.
Claims (9)
1. The sidewall rubber for the all-steel tire is characterized by comprising the following components in parts by weight:
50.0-70.0 parts of natural rubber, 10.0-35.0 parts of high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, 0.5-2.0 parts of carbon black coupling agent, 30.0-45.0 parts of carbon black, 0.5-2.5 parts of stearic acid, 3.0-5.0 parts of zinc oxide, 1.0-3.0 parts of homogenizing agent, 0.5-2.0 parts of anti-aging agent RD, 40204.0-6.0 parts of anti-aging agent, 1.0-4.0 parts of tackifying resin, 0.5-2.0 parts of protective wax, 2.0-5.0 parts of rubber operating oil, 0.5-1.0 part of sulfenamide accelerator and 1.2-1.8 parts of sulfur.
2. The sidewall rubber for all-steel tires according to claim 1, characterized in that, the rubber compound composition comprises, in parts by weight:
55.0-65.0 parts of natural rubber, 10.0-25.0 parts of high cis-butadiene rubber, 20.0-30.0 parts of high cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, 0.8-1.5 parts of carbon black coupling agent, 35.0-40.0 parts of carbon black, 1.0-2.0 parts of stearic acid, 3.5-4.5 parts of zinc oxide, 1.0-3.0 parts of homogenizing agent, 1.0-1.5 parts of anti-aging agent RD, 40204.0-5.0 parts of anti-aging agent, 2.0-3.0 parts of tackifying resin, 1.0-1.5 parts of protective wax, 2.0-5.0 parts of rubber operating oil, 0.8-1.0 part of sulfenamide accelerator and 1.4-1.6 parts of sulfur.
3. The sidewall rubber for all-steel tires according to claim 1 or 2, characterized in that the content of trans-1, 4 polyisoprene in the high cis-butadiene rubber containing microdispersed trans-1, 4 polyisoprene is 10-50%.
4. The sidewall rubber for all-steel tires according to claim 1 or 2, characterized in that the cis content of the high cis-butadiene rubber is not less than 92%, and BR9000 is selected as the high cis-butadiene rubber.
5. The sidewall rubber for all-steel tires according to claim 1 or 2, characterized in that, the carbon black coupling agent is a compound of the following formula:
6. the sidewall rubber for all-steel tires according to claim 1 or 2, characterized in that, the carbon black is one or two of N660 carbon black and N550 carbon black.
7. The sidewall rubber for all-steel tires according to claim 1 or 2, characterized in that, the tackifying resin is acetylene type tert-butyl phenol aldehyde tackifying resin KORESIN.
8. The sidewall rubber for all-steel tires according to claim 1 or 2, characterized in that, the sulfenamide accelerator is dicyclohexyl-2-benzothiazolesulfenamide DZ in combination with N-tert-butyl-2-benzothiazolesulfenamide NS.
9. The preparation method of the sidewall rubber for the all-steel tire as claimed in claim 1 or 2, characterized by comprising the following steps:
first-stage mixing: adding natural rubber, 15-25 parts of carbon black and a carbon black coupling agent into an internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt, mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 20s, opening a discharge gate for rubber discharge, controlling the rubber discharge temperature, discharging sheets of an open mill, cooling and stacking to obtain a section of masterbatch;
wherein the rotating speed of the internal mixer is 50 r/min, and the rubber discharging temperature is controlled to be 140-155 ℃;
and (3) second-stage mixing: adding a first-stage masterbatch into an internal mixer, adding high-cis-butadiene rubber, high-cis-butadiene rubber containing micro-dispersed trans-1, 4 polyisoprene rubber, residual carbon black, an anti-aging agent, stearic acid, tackifying resin, a homogenizing agent, protective wax and rubber operating oil, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 20s, lifting the top bolt, pressing the top bolt for mixing for 25s, opening a discharge gate for discharging rubber, controlling the rubber discharging temperature, opening a mixer for discharging, cooling and building stack to obtain a second-stage masterbatch;
wherein the rotating speed of the internal mixer is 50 r/min, and the rubber discharging temperature is controlled to be 150-155 ℃;
three-stage mixing: adding the two-section masterbatch into an internal mixer, pressing a top bolt for mixing for 35s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 35s, opening a discharging door for discharging rubber, controlling the rubber discharging temperature, discharging a piece below the open mixer, cooling and stacking to obtain three-section masterbatch;
wherein the rotating speed of the internal mixer is 50 r/min, and the rubber discharging temperature is controlled to be 150-155 ℃;
and (3) final refining: adding the three-section master batch, sulfur, an accelerator and zinc oxide into an internal mixer, pressing a top bolt for mixing for 30s, lifting the top bolt for cleaning, pressing the top bolt for mixing for 30s, lifting the top bolt, pressing the top bolt for mixing for 20s, lifting the top bolt, discharging rubber by opening a discharging door, controlling the rubber discharging temperature, discharging sheets by opening the mixer, cooling and stacking;
wherein the rotating speed of the internal mixer is 28 r/min, and the rubber discharge temperature is controlled to be 95-105 ℃.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321908A (en) * | 2020-11-16 | 2021-02-05 | 四川轮胎橡胶（集团）股份有限公司 | Rubber material composition, rubber compound, preparation method of rubber compound and spare tire |
| CN114752119A (en) * | 2022-04-21 | 2022-07-15 | 中策橡胶集团股份有限公司 | Low-heat-generation rubber composition with excellent scorching performance, mixing method and application thereof, and tire |
| CN116120643A (en) * | 2022-12-30 | 2023-05-16 | 中策橡胶(天津)有限公司 | Puncture-resistant low-split underground engineering tire sidewall composition and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0589291A1 (en) * | 1992-09-16 | 1994-03-30 | The Goodyear Tire & Rubber Company | Tire with apex rubber blend |
| CN1206725A (en) * | 1997-07-28 | 1999-02-03 | 青岛化工学院 | Fine quality tyre rubber material containing rich trans-1,4-polyisoprene |
| US20020011293A1 (en) * | 1999-03-02 | 2002-01-31 | David John Zanzig | Tire with reinforced rubber sidewall |
| CN103804724A (en) * | 2012-11-08 | 2014-05-21 | 住友橡胶工业株式会社 | Rubber composition and pneumatic tire |
| CN105418998A (en) * | 2015-12-17 | 2016-03-23 | 山东永泰集团有限公司 | Sidewall rubber and preparation method thereof |
| CN105906877A (en) * | 2016-04-23 | 2016-08-31 | 北京化工大学 | Gutta-percha masterbatch co-blended material capable of being directly used as traditional rubber material |
-
2019
- 2019-08-29 CN CN201910807067.9A patent/CN110591171B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0589291A1 (en) * | 1992-09-16 | 1994-03-30 | The Goodyear Tire & Rubber Company | Tire with apex rubber blend |
| CN1206725A (en) * | 1997-07-28 | 1999-02-03 | 青岛化工学院 | Fine quality tyre rubber material containing rich trans-1,4-polyisoprene |
| US20020011293A1 (en) * | 1999-03-02 | 2002-01-31 | David John Zanzig | Tire with reinforced rubber sidewall |
| CN103804724A (en) * | 2012-11-08 | 2014-05-21 | 住友橡胶工业株式会社 | Rubber composition and pneumatic tire |
| CN105418998A (en) * | 2015-12-17 | 2016-03-23 | 山东永泰集团有限公司 | Sidewall rubber and preparation method thereof |
| CN105906877A (en) * | 2016-04-23 | 2016-08-31 | 北京化工大学 | Gutta-percha masterbatch co-blended material capable of being directly used as traditional rubber material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321908A (en) * | 2020-11-16 | 2021-02-05 | 四川轮胎橡胶（集团）股份有限公司 | Rubber material composition, rubber compound, preparation method of rubber compound and spare tire |
| CN112321908B (en) * | 2020-11-16 | 2023-04-07 | 四川轮胎橡胶（集团）股份有限公司 | Rubber material composition, rubber compound, preparation method of rubber compound and spare tire |
| CN114752119A (en) * | 2022-04-21 | 2022-07-15 | 中策橡胶集团股份有限公司 | Low-heat-generation rubber composition with excellent scorching performance, mixing method and application thereof, and tire |
| CN116120643A (en) * | 2022-12-30 | 2023-05-16 | 中策橡胶(天津)有限公司 | Puncture-resistant low-split underground engineering tire sidewall composition and preparation method thereof |
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