CN110713633A - Rubber composition for tread of low-heat-generation giant engineering radial tire - Google Patents
Rubber composition for tread of low-heat-generation giant engineering radial tire Download PDFInfo
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- CN110713633A CN110713633A CN201911174316.1A CN201911174316A CN110713633A CN 110713633 A CN110713633 A CN 110713633A CN 201911174316 A CN201911174316 A CN 201911174316A CN 110713633 A CN110713633 A CN 110713633A
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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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- 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
- B60C1/0016—Compositions of the tread
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of tire rubber, in particular to a low-heat-generation giant engineering radial tire tread rubber composition which is characterized by further comprising the following components in parts by weight based on 100 parts by weight of natural rubber: 15-45 parts of carbon black, 0-20 parts of white carbon black, 1-3 parts of stearic acid, 4-6 parts of zinc oxide, 1-3 parts of an anti-aging agent 40201, 1-3 parts of an anti-aging agent RD, 1-4 parts of protective wax, 0-4 parts of a silane coupling agent, 0.1-3 parts of a special functional additive, 0.1-0.4 part of pentachlorothiophenol, 0-3 parts of N-tert-butyl-2-benzothiazyl sulfenamide, 0.1-0.4 part of diphenylguanidine, 1-4 parts of sulfur powder and 0.1-1 part of an anti-scorching agent; the special functional additive comprises the following chemical components:
Description
Technical Field
The invention relates to the technical field of tire rubber, in particular to a low-heat-generation giant engineering radial tire tread rubber composition.
Background
It is known that, in recent years, with the vigorous development of the international market on mineral resources, a large number of engineering machinery tire manufacturers are driven to develop rapidly, particularly, the market demand of large tires for mining dump trucks is increased sharply, customers have higher and higher requirements on the use of engineering machinery vehicles and engineering machinery tires, the large engineering radial tire has higher requirements on the overall durability, heat generation performance and strength of rubber materials due to thicker section size, higher load and severe working environment, the heat accumulated in the tire is not easy to dissipate in the use process, the tire is delaminated and failed due to excessive heat accumulation, the reduction of the heat generation of the tire is particularly important for prolonging the service life of the tire, and meanwhile, the rubber composition used for tire treads and the like needs to have lower tan delta due to the serious reversion problem in the production caused by the low temperature and long-time vulcanization of the large tire, in addition to excellent reversion resistance, the rubber composition for the tread needs to have good wear resistance, and how to take both wear resistance and heat generation into consideration is a subject of research by formula technicians, and the balance between the properties of the polymer and the filler is achieved by changing the types and the amounts of the polymer and the filler, although the effect is certain, the effect is not ideal.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a low-heat-generation giant project radial tire tread rubber composition which has the advantages of reducing loss factors, improving elasticity and tensile strength, having excellent anti-reversion performance, reducing dynamic heat generation and prolonging fatigue life on the basis of not reducing the wear resistance of the tread.
The technical scheme adopted by the invention for solving the technical problems is as follows: the rubber composition for the tread of the low-heat-generation giant project radial tire is characterized by further comprising the following components in parts by weight based on 100 parts by weight of natural rubber:
15-45 parts of carbon black, 0-20 parts of white carbon black, 1-3 parts of stearic acid, 4-6 parts of zinc oxide, 1-3 parts of an anti-aging agent 40201, 1-3 parts of an anti-aging agent RD, 1-4 parts of protective wax, 0-4 parts of a silane coupling agent, 0.1-3 parts of a special functional additive, 0.1-0.4 part of pentachlorothiophenol, 0-3 parts of N-tert-butyl-2-benzothiazyl sulfenamide, 0.1-0.4 part of diphenylguanidine, 1-4 parts of sulfur powder and 0.1-1 part of an anti-scorching agent; the special functional additive comprises the following chemical components:
the invention has the advantages that the special functional additive can help the carbon black to disperse, weaken Payne effect, enable the high-reinforcement carbon black to realize the balance of low heat generation and high damage resistance, and meanwhile, the complex formed by the special functional additive stabilizes polysulfide bonds to realize the reversion resistance.
Detailed Description
The invention is further described with reference to the following examples:
the preparation steps of the invention are as follows:
the first scheme is as follows: (ZnO is added to the masterbatch)
First-stage mixing: starting a Banbury mixer (GK400), setting the rotor speed of the Banbury mixer to be 40-50rpm, adding rubber, stearic acid, zinc oxide, special functional additives and the like, and mixing for 10-60 s; lifting the plug, adding carbon black for pressing the plug, setting the rotating speed of a rotor of the internal mixer to be 50-60rpm for mixing for 20-150s, lifting the plug, pressing the plug, setting the rotating speed to be 10-30rpm for mixing for 60s at constant temperature of 140 ℃; controlling the temperature to 145-155 ℃ for glue discharging;
first parking: placing a section of master batch obtained by mixing the section of master batch in air, and naturally cooling to room temperature;
and (3) second-stage mixing: starting an internal mixer (GK400), setting the rotating speed of a rotor of the internal mixer to be 40-45rpm, weighing a section of master batch according to the weight, and adding the master batch into the internal mixer for mixing for 10-20 s; lifting the plug, adding white carbon black and small materials, pressing the plug, and mixing for 10-50 s; lifting and pressing the bolt; mixing for 50-200s to discharge rubber;
and (5) parking for the second time: placing the second-stage masterbatch obtained by mixing the second stage in air, and naturally cooling;
three-stage mixing: starting an internal mixer (GK400), setting the rotating speed of a rotor of the internal mixer to be 35-40rpm, adding two-stage rubber compound obtained by mixing into the internal mixer for mixing, extracting and pressing the bolt twice for 30-40s respectively, and discharging the rubber at the temperature of 130-;
and (3) parking for the third time: putting the three-section master batch obtained by three-section mixing in air, and naturally cooling;
and (3) final refining: starting the internal mixer (GK255), setting the rotating speed of a rotor of the internal mixer to be 16-20rpm, adding the three-section master batch, the N-tert-butyl-2-benzothiazyl sulfenamide, the diphenylguanidine, the sulfur powder and the scorch retarder into the internal mixer, mixing for 30s for bolt extraction, then continuing mixing for 40s for bolt extraction, continuing mixing to 105 ℃ for rubber discharge, and keeping the total mixing time to be 140 and 155 s.
Scheme II: (ZnO is added to the final rubber)
First-stage mixing: starting a Banbury mixer (GK400), setting the rotor speed of the Banbury mixer to be 40-50rpm, adding rubber, stearic acid, special functional additives and the like, and mixing for 10-60 s; lifting the plug, adding carbon black for pressing the plug, setting the rotating speed of a rotor of the internal mixer to be 50-60rpm for mixing for 20-150s, lifting the plug, pressing the plug, setting the rotating speed to be 10-30rpm for mixing for 60s at constant temperature of 140 ℃; controlling the temperature to 145-155 ℃ for glue discharging;
first parking: placing a section of master batch obtained by mixing the section of master batch in air, and naturally cooling to room temperature;
and (3) second-stage mixing: starting an internal mixer (GK400), setting the rotating speed of a rotor of the internal mixer to be 40-45rpm, weighing a section of master batch according to the weight, and adding the master batch into the internal mixer for mixing for 10-20 s; lifting the plug, adding white carbon black and small materials, pressing the plug, and mixing for 10-50 s; lifting and pressing the bolt; mixing for 50-200s to discharge rubber;
and (5) parking for the second time: placing the second-stage masterbatch obtained by mixing the second stage in air, and naturally cooling;
three-stage mixing: starting an internal mixer (GK400), setting the rotating speed of a rotor of the internal mixer to be 35-40rpm, adding two-stage rubber compound obtained by mixing into the internal mixer for mixing, extracting and pressing the bolt twice for 30-40s respectively, and discharging the rubber at the temperature of 130-;
and (3) parking for the third time: putting the three-section master batch obtained by three-section mixing in air, and naturally cooling;
and (3) final refining: starting the internal mixer (GK255), setting the rotating speed of a rotor of the internal mixer to be 16-20rpm, adding the three sections of master batch, the zinc oxide, the N-tert-butyl-2-benzothiazyl sulfenamide, the diphenylguanidine, the sulfur powder and the anti-scorching agent into the internal mixer, mixing for 30s for bolt lifting, then continuing mixing for 40s for bolt lifting, continuing mixing to 105 ℃ for rubber discharge, and setting the total mixing time to be 140-155 s.
The third scheme is as follows: (ZnO was added to the masterbatch and the final batch, respectively)
First-stage mixing: starting a Banbury mixer (GK400), setting the rotor speed of the Banbury mixer to be 40-50rpm, adding rubber, stearic acid, zinc oxide, special functional additives and the like, and mixing for 10-60 s; lifting the plug, adding carbon black for pressing the plug, setting the rotating speed of a rotor of the internal mixer to be 50-60rpm for mixing for 20-150s, lifting the plug, pressing the plug, setting the rotating speed to be 10-30rpm for mixing for 60s at constant temperature of 140 ℃; controlling the temperature to 145-155 ℃ for glue discharging;
first parking: placing a section of master batch obtained by mixing the section of master batch in air, and naturally cooling to room temperature;
and (3) second-stage mixing: starting an internal mixer (GK400), setting the rotating speed of a rotor of the internal mixer to be 40-45rpm, weighing a section of master batch according to the weight, and adding the master batch into the internal mixer for mixing for 10-20 s; lifting the plug, adding white carbon black and small materials, pressing the plug, and mixing for 10-50 s; lifting and pressing the bolt; mixing for 50-200s to discharge rubber;
and (5) parking for the second time: placing the second-stage masterbatch obtained by mixing the second stage in air, and naturally cooling;
three-stage mixing: starting an internal mixer (GK400), setting the rotating speed of a rotor of the internal mixer to be 35-40rpm, adding two-stage rubber compound obtained by mixing into the internal mixer for mixing, extracting and pressing the bolt twice for 30-40s respectively, and discharging the rubber at the temperature of 130-;
and (3) parking for the third time: putting the three-section master batch obtained by three-section mixing in air, and naturally cooling;
and (3) final refining: starting the internal mixer (GK255), setting the rotating speed of a rotor of the internal mixer to be 16-20rpm, adding the three sections of master batch, the zinc oxide, the N-tert-butyl-2-benzothiazyl sulfenamide, the diphenylguanidine, the sulfur powder and the anti-scorching agent into the internal mixer, mixing for 30s for bolt lifting, then continuing mixing for 40s for bolt lifting, continuing mixing to 105 ℃ for rubber discharge, and setting the total mixing time to be 140-155 s.
The physical property table and the durability test of the composition matching and formula of the specific embodiment are respectively shown in the following tables 1, 2 and 3:
table 1: the composition of the invention is shown in the following formula (the unit of the content of each raw material is weight portion):
| name of Material | Comparative example | Example 1 | Example 2 | Example 3 |
| No. 3 smoked sheet glue | 100 | 100 | 100 | 100 |
| N330 carbon black | 35 | 35 | 35 | 35 |
| White carbon black | 14 | 14 | 14 | 14 |
| Silane coupling agent | 2.4 | 2.4 | 2.4 | 2.4 |
| Special functional additive | — | 0.5 | 0.5 | 0.5 |
| Zinc oxide | 5 | 5 | 5 | 5 |
| Stearic acid | 2 | 2 | 2 | 2 |
| Antiager RD | 1.5 | 1.5 | 1.5 | 1.5 |
| Anti-aging agent 4020 | 2.5 | 2.5 | 2.5 | 2.5 |
| Protective wax | 2 | 2 | 2 | 2 |
| Accelerator NS | 1.5 | 1.5 | 1.5 | 1.5 |
| Sulfur S | 1.4 | 1.4 | 1.4 | 1.4 |
| Diphenylguanidine | 0.28 | 0.28 | 0.28 | 0.28 |
| Pentachlorothiophenol | 0.3 | 0.30 | 0.3 | 0.3 |
| Scorch retarder CTP | 0.3 | 0.30 | 0.3 | 0.3 |
Remarking: (examples 1, 2 and 3 correspond to the first, second and third embodiments, respectively)
The rubber compositions of the comparative examples and examples were vulcanized using a press vulcanizer at a vulcanization temperature of 130 ℃ for 120min, and were subjected to the Share A test according to the national standard GB/T531-1999 and the tensile properties test according to the national standard GB/T528-1998.
Table 2: physical property table of formula
Compared with the comparative example, the tensile strength, resilience, wear resistance and reversion resistance of the embodiment are improved, and the heat generation is reduced. By adding ZnO final refining rubber, NR/CB is better in dispersion and lower in heat generation, tan delta is reduced by 31% at 60 ℃, and ZnO masterbatch is added to produce more complexes, so that vulcanization reversion resistance is facilitated. According to the three embodiments, whichever scheme is selected, the reversion resistance of the rubber compound is improved, and the heat generation is reduced by 18-31%.
Table 3: endurance performance data for inventive composition tires
The 33.00R51 size tires trial used in example 2 were tested against the control tires for durability comparison:
loading road test
4 test tires with the specification of 33.00R51 TL588 are manufactured by trial according to the formula scheme of the example 2 and sent to a certain domestic mine for road test, the test tires run for 896 hours at present, the ground surface is smooth, and the test tires are continuously tracked in the later period.
Claims (1)
1. The rubber composition for the tread of the low-heat-generation giant project radial tire is characterized by further comprising the following components in parts by weight based on 100 parts by weight of natural rubber:
15-45 parts of carbon black, 0-20 parts of white carbon black, 1-3 parts of stearic acid, 4-6 parts of zinc oxide, 1-3 parts of an anti-aging agent 40201, 1-3 parts of an anti-aging agent RD, 1-4 parts of protective wax, 0-4 parts of a silane coupling agent, 0.1-3 parts of a special functional additive, 0.1-0.4 part of pentachlorothiophenol, 0-3 parts of N-tert-butyl-2-benzothiazyl sulfenamide, 0.1-0.4 part of diphenylguanidine, 1-4 parts of sulfur powder and 0.1-1 part of an anti-scorching agent; the special functional additive comprises the following chemical components:
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911174316.1A CN110713633A (en) | 2019-11-26 | 2019-11-26 | Rubber composition for tread of low-heat-generation giant engineering radial tire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911174316.1A CN110713633A (en) | 2019-11-26 | 2019-11-26 | Rubber composition for tread of low-heat-generation giant engineering radial tire |
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| CN110713633A true CN110713633A (en) | 2020-01-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060247342A1 (en) * | 2003-09-15 | 2006-11-02 | Michelin Recherche Et Technique S.A. | Rubber composition comprising a citraconimidomaleimide |
| CN104910451A (en) * | 2015-06-29 | 2015-09-16 | 大冢材料科技（上海）有限公司 | Rubber composition containing multifunctional maleimide compound |
| CN108117680A (en) * | 2017-12-29 | 2018-06-05 | 大冢材料科技（上海）有限公司 | Rubber composition and preparation method thereof |
| CN110283364A (en) * | 2019-07-03 | 2019-09-27 | 大冢材料科技（上海）有限公司 | A kind of rubber composition and preparation method thereof for safety tread sidewall |
-
2019
- 2019-11-26 CN CN201911174316.1A patent/CN110713633A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060247342A1 (en) * | 2003-09-15 | 2006-11-02 | Michelin Recherche Et Technique S.A. | Rubber composition comprising a citraconimidomaleimide |
| CN104910451A (en) * | 2015-06-29 | 2015-09-16 | 大冢材料科技（上海）有限公司 | Rubber composition containing multifunctional maleimide compound |
| CN108117680A (en) * | 2017-12-29 | 2018-06-05 | 大冢材料科技（上海）有限公司 | Rubber composition and preparation method thereof |
| CN110283364A (en) * | 2019-07-03 | 2019-09-27 | 大冢材料科技（上海）有限公司 | A kind of rubber composition and preparation method thereof for safety tread sidewall |
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Application publication date: 20200121 |
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