CN107501661B - Rubber composition for tire, tire and preparation method thereof - Google Patents
Rubber composition for tire, tire and preparation method thereof Download PDFInfo
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- CN107501661B CN107501661B CN201710936700.5A CN201710936700A CN107501661B CN 107501661 B CN107501661 B CN 107501661B CN 201710936700 A CN201710936700 A CN 201710936700A CN 107501661 B CN107501661 B CN 107501661B
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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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
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention provides a rubber composition for a tire. According to the rubber composition, the silica with the high specific surface area and the mercaptosilane coupling agent are used together, the silica with the high specific surface area can effectively reinforce the rubber, so that the rubber composition has high wear resistance, low rolling resistance and high grip performance, and the raw rubber in the rubber composition uses SSBR and NR and BR, so that the SSBR and the silica have high affinity, and the rubber composition is beneficial to dispersion of the silica in a rubber matrix, and thus the rolling resistance of the rubber composition is reduced. Meanwhile, the use amount of the mercapto silane coupling agent is controlled, so that the compatibility between the silica with high specific surface area and rubber can be effectively improved, and the rolling resistance of the rubber composition is reduced. The tire prepared from the rubber composition for the tire also has high wear resistance, low rolling resistance and high ground gripping performance.
Description
Technical Field
The invention belongs to the technical field of rubber, and particularly relates to a rubber composition for a tire, the tire and a preparation method of the tire.
Background
Developments in the automotive industry have benefited from substantial advances in the technology of the individual components themselves. As a significant component of the automobile, the development of tires has directly influenced the progress of the automobile industry.
Along with the popularization of the concept of green tires, the sound for designing environment-friendly tires is higher and higher, the popularization of European Union label regulations pushes various tire enterprises to improve the safety of tires and reduce rolling resistance, so that the fuel consumption of automobiles is reduced, at present, the most effective mode for reducing the rolling resistance of tires is to use white carbon black in the formula, however, as the white carbon black is used in tread rubber instead of carbon black in a large amount, the treads are easier to wear, as the tire wear occurs, a large amount of auxiliary agents in a rubber composition can be emitted in the air, and meanwhile, a large amount of micro particles can be generated, so that the PM2.5 index exceeds the standard, although the rolling resistance of the tires is reduced on the surface by the formula design of the traditional mode, the wear performance of the tires is actually lost, and the environment is seriously polluted.
Therefore, a tread rubber formula capable of improving wear resistance and reducing rolling resistance is in urgent need in the tire industry.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a rubber composition for a tire, a tire and a preparation method thereof, wherein the rubber composition for a tire provided by the present invention has high wear resistance and low rolling resistance.
The present invention provides a rubber composition for a tire, comprising:
0 to 30 parts by mass of a natural rubber;
30-80 parts by mass of solution polymerized styrene-butadiene rubber;
0-30 parts by mass of butadiene rubber;
30-60 parts by mass of high specific surface area silica;
2.4 to 9 parts by mass of a mercaptosilane coupling agent;
0 to 30 parts by mass of a reinforcing agent;
4-52 parts by mass of an auxiliary agent.
Preferably, the auxiliary agent comprises:
0-30 parts by mass of a rubber process oil;
2-4 parts by mass of zinc oxide;
1-3 parts by mass of stearic acid;
0-6 parts by mass of an antioxidant;
0 to 4 parts by mass of an accelerator;
0-3 parts by mass of paraffin wax;
1-2 parts by mass of sulfur.
Preferably, the anti-aging agent comprises 0-3 parts by mass of p-phenylenediamine anti-aging agent and 0-3 parts by mass of quinoline anti-aging agent;
the accelerator comprises 0-2 parts by mass of sulfenamide accelerator and 0-2 parts by mass of thiuram accelerator.
Preferably, the p-phenylenediamine antioxidant is selected from 6PPD or IPPD, the quinoline antioxidant is selected from TMQ, the sulfenamide accelerator is selected from TBBS, CBS or NOBS, and the thiuram accelerator is selected from TMTM, TMTD or TBzTD.
Preferably, the specific surface area of the high specific surface area silica is 175-230 m2/g。
Preferably, the vinyl content of the solution-polymerized styrene-butadiene rubber is 50-70%, the butadiene rubber is neodymium butadiene rubber and/or nickel butadiene rubber, the mercaptosilane coupling agent is selected from Si363 or Si747, the reinforcing agent is carbon black, and the carbon black accounts for 0-50% of the high specific surface area silica.
Preferably, the dosage of the mercaptosilane is 8 to 15 percent of that of the high specific surface area silica.
Preferably, the mass ratio of the total amount of the natural rubber, the butadiene rubber, the solution-polymerized styrene-butadiene rubber, the high-specific-surface-area silica, the mercaptosilane coupling agent and the reinforcing agent to the auxiliary agent is (150-190): (8-16).
The invention also provides a tire prepared from the rubber composition for the tire.
The invention also provides a preparation method of the tire, which comprises the following steps:
A) placing natural rubber, solution polymerized styrene-butadiene rubber, a reinforcing agent, high-specific-surface-area silicon dioxide, a mercaptosilane coupling agent, rubber operating oil, zinc oxide, stearic acid, an anti-aging agent and paraffin into an internal mixer for mixing for a section to obtain primary rubber compound;
B) remilling the primary rubber compound to obtain a secondary rubber compound;
C) mixing the secondary rubber compound, an accelerator and sulfur for three times to obtain a rubber material;
D) and extruding the rubber material, molding the tire blank and vulcanizing the tire blank to obtain the tire.
Compared with the prior art, the invention provides a rubber composition for a tire, which comprises the following components: 0 to 30 parts by mass of a natural rubber; 30-80 parts by mass of solution polymerized styrene-butadiene rubber; 0-30 parts by mass of butadiene rubber; 30-60 parts by mass of high specific surface area silica; 2.4 to 9 parts by mass of a mercaptosilane coupling agent; 0 to 30 parts by mass of a reinforcing agent; 4-52 parts by mass of an auxiliary agent. According to the rubber composition, the silica with the high specific surface area and the mercaptosilane coupling agent are used together, the silica with the high specific surface area can effectively reinforce the rubber, so that the rubber composition has high wear resistance, low rolling resistance and high grip performance, and the raw rubber in the rubber composition uses SSBR and NR and BR, so that the SSBR and the silica have high affinity, and the rubber composition is beneficial to dispersion of the silica in a rubber matrix, and thus the rolling resistance of the rubber composition is reduced. Meanwhile, the use amount of the mercapto silane coupling agent is controlled, so that the compatibility between the silica with high specific surface area and rubber can be effectively improved, and the rolling resistance of the rubber composition is reduced. The tire prepared from the rubber composition for the tire also has high wear resistance, low rolling resistance and high ground gripping performance.
Detailed Description
The present invention provides a rubber composition for a tire, comprising:
0 to 30 parts by mass of a natural rubber;
30-80 parts by mass of solution polymerized styrene-butadiene rubber;
0-30 parts by mass of butadiene rubber;
30-60 parts by mass of high specific surface area silica;
2.4 to 9 parts by mass of a mercaptosilane coupling agent;
0 to 30 parts by mass of a reinforcing agent;
4-52 parts by mass of an auxiliary agent.
The rubber composition for a tire comprises 0-30 parts by mass of natural rubber, preferably 5-25 parts by mass, and more preferably 10-20 parts by mass. Preferably, the natural rubber is selected from the 20# standard rubber, wherein ash is < 1.0%; impurities < 0.16%; the volatile content is less than 0.8 percent.
The rubber composition for the tire further comprises 30-80 parts by mass of solution-polymerized styrene-butadiene rubber, preferably 40-70 parts by mass, and more preferably 50-60 parts by mass. Wherein, the vinyl content of the solution polymerized styrene-butadiene rubber is 50 to 70 percent, preferably 55 to 65 percent, and the ash content is less than 0.2 percent; the volatile content is less than 0.8 percent.
The rubber composition for a tire provided by the invention further comprises 0-30 parts by mass of butadiene rubber, preferably 5-25 parts by mass, and more preferably 10-20 parts by mass. The cis-butadiene rubber is high cis-butadiene rubber, and the ash content is less than 0.2%; the volatile content is less than 0.8 percent. The butadiene rubber is preferably neodymium butadiene rubber and/or nickel butadiene rubber.
The rubber composition for the tire further comprises 30-60 parts by mass of silica with a high specific surface area, preferably 35-55 parts by mass, and more preferably 40-50 parts by mass. The specific surface area of the high specific surface area silicon dioxide is 175-230 m2Preferably 190 to 210 m/g2(ii) in terms of/g. Heating loss of the high specific surface area silicon dioxide at 105 DEG C<8 percent; 325 mesh screen residue<0.5 percent; in the present invention, it is used as a rubber reinforcing agent and works synergistically with other auxiliary agents of the present invention.
The rubber composition for the tire further comprises 2.4-9 parts by mass of a mercaptosilane coupling agent, preferably 3-8 parts by mass, and more preferably 5-7 parts by mass. The mercaptosilane coupling agent is preferably Si363 or Si 747.
In the present invention, the amount of the mercaptosilane is 8% to 15%, preferably 9% to 14%, and more preferably 10% to 13% of the amount of the high specific surface area silica. By controlling the using amount of the mercaptosilane coupling agent, the compatibility between the silica with high specific surface area and rubber can be effectively improved, and the rolling resistance of the rubber composition is reduced.
The rubber composition for a tire provided by the present invention further comprises 0 to 30 parts by mass of a reinforcing agent, preferably 5 to 25 parts by mass, more preferably 10 to 20 parts by mass. The reinforcing agent is selected from carbon black, and the carbon black accounts for 0-50%, preferably 10-40%, and more preferably 20-30% of the high specific surface area silica. Wherein the index of the carbon black is granular; heating loss at 105 ℃ is less than 1.5 percent; 325 mesh screen residue < 0.05%.
The mass ratio of the total amount of the natural rubber, the butadiene rubber, the solution polymerized styrene-butadiene rubber, the high-specific-surface-area silica, the mercaptosilane coupling agent and the reinforcing agent to the auxiliary agent is (150-190): (8-16), preferably (160-180): (10-14).
The rubber composition for the tire further comprises 4-52 parts by mass of an auxiliary agent, and the auxiliary agent comprises:
0-30 parts by mass of a rubber process oil;
2-4 parts by mass of zinc oxide;
1-3 parts by mass of stearic acid;
0-6 parts by mass of an antioxidant;
0 to 4 parts by mass of an accelerator;
0-3 parts by mass of paraffin wax;
1-2 parts by mass of sulfur.
Specifically, the rubber composition for a tire provided by the invention comprises 0-30 parts by mass of rubber process oil, preferably 5-25 parts by mass, and more preferably 10-20 parts by mass.
The rubber composition for a tire provided by the invention further comprises 2-4 parts by mass of zinc oxide, preferably 2.5-3.5 parts by mass. The zinc oxide is in powder form; the indexes are as follows: the zinc oxide content is more than 99.5%; 325 mesh screen residue < 0.15%; acetic acid insoluble matter is less than 0.008%. In the present invention, the zinc oxide acts as a sizing vulcanization activator and acts synergistically with the other auxiliaries of the present invention.
The rubber composition for a tire further comprises 1-3 parts by mass of stearic acid, preferably 1.5-2.5 parts by mass. In the present invention, the stearic acid is in the form of granules; iodine value of less than 8gI2/100 g; freezing point 57.0 +/-5.0 ℃; the acid value was 200.0. + -. 12.0mg KOH/g. The stearic acid is used as a sizing vulcanization activator and acts synergistically with the other auxiliaries of the invention.
The rubber composition for the tire further comprises 0-6 parts by mass of an anti-aging agent, wherein the anti-aging agent comprises 0-3 parts by mass of p-phenylenediamine anti-aging agent and 0-3 parts by mass of quinoline anti-aging agent. The p-phenylenediamine anti-aging agent is granular; a crystallization point >45 ℃; heating loss was < 0.5%. The quinoline antioxidant is granular; the softening point is 90.0 +/-5.0 ℃; heating loss was < 0.5%. Preferably, the anti-aging agent is a composite anti-aging agent formed by a p-phenylenediamine anti-aging agent and a quinoline anti-aging agent, and the composite anti-aging agent comprises 1-3 parts by mass of the p-phenylenediamine anti-aging agent and 1-3 parts by mass of the quinoline anti-aging agent. The p-phenylenediamine anti-aging agent is selected from 6PPD or IPPD, and the quinoline anti-aging agent is selected from TMQ.
The rubber composition for the tire further comprises 0-4 parts by mass of an accelerator, wherein the accelerator comprises 0-2 parts by mass of a sulfenamide accelerator and 0-2 parts by mass of a thiuram accelerator. The sulfenamide accelerator is in a powder shape; the initial melting point is 104 +/-3 ℃; the heating loss is less than 0.5 percent at 70 ℃ for 3 hours. The thiuram accelerant is yellow powder; the initial melting point is 104 +/-3 ℃; the heating loss is less than 0.5 percent at 70 ℃ for 3 hours. Preferably, the accelerator is a composite accelerator formed by a sulfenamide accelerator and a thiuram accelerator, and in the invention, the composite accelerator comprises 0.5-1.5 parts by mass of sulfenamide accelerator and 0.5-1.5 parts by mass of thiuram accelerator. The sulfenamide accelerator is selected from TBBS, CBS or NOBS, and the thiuram accelerator is selected from TMTM, TMTD or TBzTD.
The rubber composition for a tire further comprises 0-3 parts by mass of paraffin, preferably 0.5-2.5 parts by mass, and more preferably 1.0-2.0 parts by mass. The paraffin is granular; the freezing point is 63-67 ℃; the refractive index (80 ℃) is 1.4300-1.4400. The paraffin provides aging resistance for the sizing material and has synergistic effect with other additives of the invention.
The rubber composition for the tire further comprises 1-2 parts by mass of sulfur, preferably 1.2-1.8 parts by mass, and more preferably 1.4-1.6 parts by mass. The sulfur is in powder form; the total sulfur content is greater than 98%; the residue of the 200-mesh sieve is less than 0.5 percent; the heating loss is less than 0.5 percent in 3 hours at 80 ℃. The sulfur is used as a sizing material vulcanization crosslinking agent and has a synergistic effect with other additives of the invention.
The invention also provides a tire prepared from the rubber composition for the tire, and the tire has low rolling resistance and high wear resistance.
In the invention, the tire is prepared by adopting a three-stage mixing process, and the specific method comprises the following steps:
A) placing natural rubber, solution polymerized styrene-butadiene rubber, a reinforcing agent, high-specific-surface-area silicon dioxide, a mercaptosilane coupling agent, rubber operating oil, zinc oxide, stearic acid, an anti-aging agent and paraffin into an internal mixer for mixing for a section to obtain primary rubber compound;
B) remilling the primary rubber compound to obtain a secondary rubber compound;
C) mixing the secondary rubber compound, an accelerator and sulfur for three times to obtain a rubber material;
D) and extruding the rubber material, molding the tire blank and vulcanizing the tire blank to obtain the tire.
The invention preferably adopts an F270 type internal mixer to prepare the rubber material, wherein the rotating speed of a rotor of the internal mixer is 10-60 rpm, and preferably 20-50 rpm.
Wherein the rubber discharging temperature after the mixing in the step A) is preferably 145-158 ℃, and the rubber discharging temperature after the mixing in the step C) is preferably 100-105 ℃.
The specific methods for extruding the rubber compound, molding the tire blank and vulcanizing the tire blank are not particularly limited, and the methods known to those skilled in the art can be used.
According to the rubber composition, the silica with the high specific surface area and the mercaptosilane coupling agent are used together, the silica with the high specific surface area can effectively reinforce rubber, so that the rubber composition has high wear resistance, low rolling resistance and high grip performance, the raw rubber in the rubber composition uses SSBR and NR and BR, the SSBR has high affinity with the silica with the high specific surface area, the silica is favorably dispersed in a rubber matrix, and the SSBR is also favorable for improving the problem that the silica with the high specific surface area is not easily dispersed in common rubber, so that the rolling resistance of the rubber composition is reduced. According to the invention, the BR rubber is additionally used on the basis, the wear resistance of the rubber material is further improved by utilizing the characteristics of the BR rubber, the glass transition temperature of the composition is reduced, and the composition has certain low temperature resistance, so that the BR rubber is suitable for tire treads. Meanwhile, the invention controls the dosage of the mercaptosilane coupling agent, can effectively improve the compatibility between the silica with high specific surface area and rubber, and can solve the problem of insufficient surface modification of the common silane and the silica with high specific surface area by using the mercaptosilane, so that the silica with high specific surface area is better dispersed in rubber materials, and the invention is beneficial to reducing the rolling resistance of the rubber composition. The tire prepared from the rubber composition for the tire also has high wear resistance, low rolling resistance and high ground gripping performance.
For further understanding of the present invention, the following examples are provided to illustrate the rubber composition for a tire and a method for producing the same, and the scope of the present invention is not limited by the following examples.
Example 1
The weight percentages are as follows: 20kg of No. 20 natural rubber, 85060 kg of solution-polymerized styrene-butadiene rubber HPR, CB2420kg of butadiene rubber, N33915 kg of carbon black, 200MP of high specific surface area silica: 50Kg, a silane coupling agent Si 3635 Kg, 10Kg of rubber process oil, 3Kg of indirect zinc oxide, 2Kg of stearic acid, 1Kg of p-phenylenediamine antioxidant 6PPD, 1Kg of quinoline antioxidant TMQ, 1Kg of paraffin, 1.5Kg of sulfenamide accelerator TBBS, 0.5Kg of thiuram accelerator TMTD and 1.2Kg of sulfur.
Processing the composition material by adopting a 3-stage mixing process, wherein 3-stage mixing is carried out in an F270 type internal mixer, and the rotating speed of a rotor is 10-60 r/min; 3, mixing and then discharging the sheets by an open mill; the charging sequence is as follows: in one section, 20kg of natural rubber, 60 kg of solution polymerized styrene butadiene rubber, 20kg of butadiene rubber, 15kg of carbon black, high specific surface area silica: 50Kg, 5Kg of silane coupling agent, 10Kg of oil, 3Kg of zinc oxide, 2Kg of stearic acid, 1Kg of p-phenylenediamine antioxidant, 1Kg of quinoline antioxidant and 1Kg of paraffin, wherein the degumming temperature is 150 ℃; the second stage is a remilling process of the rubber compound; in the third section, 1.5Kg of sulfenamide accelerator, 0.5Kg of thiuram accelerator and 1.2Kg of sulfur are added, and the degumming temperature is 102 ℃. After standing for 4 hours, a sizing material was obtained.
And (3) extruding the tire component by using the rubber material, standing for 8 hours, then molding a tire blank, and finally vulcanizing the tire blank to obtain the final tire.
The properties of the compound and of the tire were determined and the results are given in table 1. Table 1 shows the properties of the compounds prepared in the examples and comparative examples and of the tires.
TABLE 1 Properties of the compounds and tires prepared in the examples and comparative examples
Note: the normal low rolling resistance tire provided by the comparative example 4 is selected as a reference comparison, and the reference coefficient is 100.
Example 2
The weight percentages are as follows: 10kg of No. 20 natural rubber, 85070 kg of solution-polymerized styrene-butadiene rubber HPR, CB2420kg of butadiene rubber, N33910 of carbon black, 33910 kg of high-specific-surface-area silica 200 MP: 55Kg, 35.5 Kg of silane coupling agent, 10Kg of rubber operating oil, 3Kg of indirect zinc oxide, 2Kg of stearic acid, 1Kg of p-phenylenediamine antioxidant 6PPD, 1Kg of quinoline antioxidant TMQ, 1Kg of paraffin, 1.5Kg of sulfenamide accelerator TBBS, 0.5Kg of thiuram accelerator TMTD and 1.2Kg of sulfur.
Processing the composition material by adopting a 3-stage mixing process, wherein 3-stage mixing is carried out in an F270 type internal mixer, and the rotating speed of a rotor is 10-60 r/min; 3, mixing and then discharging the sheets by an open mill; the charging sequence is as follows: in one section, 10kg of natural rubber, 70 kg of solution polymerized styrene butadiene rubber, 20kg of butadiene rubber, 10kg of carbon black, high specific surface area silica: 55Kg, 5.5Kg of silane coupling agent, 10Kg of oil, 3Kg of zinc oxide, 2Kg of stearic acid, 1Kg of p-phenylenediamine antioxidant, 1Kg of quinoline antioxidant, 1Kg of paraffin and the glue discharging temperature of 150 ℃; the second stage is a remilling process of the rubber compound; in the third section, 1.5Kg of sulfenamide accelerator, 0.5Kg of thiuram accelerator and 1.2Kg of sulfur are added, and the degumming temperature is 102 ℃. After standing for 4 hours, a sizing material was obtained.
And (3) extruding the tire component by using the rubber material, standing for 8 hours, then molding a tire blank, and finally vulcanizing the tire blank to obtain the final tire.
The properties of the compound and of the tire were determined and the results are given in table 1. Table 1 shows the properties of the compounds prepared in the examples and comparative examples and of the tires.
Example 3
The weight percentages are as follows: 10kg of No. 20 natural rubber, 85070 kg of solution-polymerized styrene-butadiene rubber HPR, CB2420kg of butadiene rubber, N33910 of carbon black, 33910 kg of high-specific-surface-area silica 200 MP: 50Kg, a silane coupling agent Si 3635 Kg, 5Kg of rubber process oil, 3Kg of indirect zinc oxide, 2Kg of stearic acid, 1Kg of p-phenylenediamine antioxidant 6PPD, 1Kg of quinoline antioxidant TMQ, 1Kg of paraffin, 1.5Kg of sulfenamide accelerator TBBS, 0.5Kg of thiuram accelerator TMTD and 1.2Kg of sulfur.
Processing the composition material by adopting a 3-stage mixing process, wherein 3-stage mixing is carried out in an F270 type internal mixer, and the rotating speed of a rotor is 10-60 r/min; 3, mixing and then discharging the sheets by an open mill; the charging sequence is as follows: in one section, 10kg of natural rubber, 70 kg of solution polymerized styrene butadiene rubber, 20kg of butadiene rubber, 10kg of carbon black, high specific surface area silica: 55Kg, 5.5Kg of silane coupling agent, 10Kg of oil, 3Kg of zinc oxide, 2Kg of stearic acid, 1Kg of p-phenylenediamine antioxidant, 1Kg of quinoline antioxidant, 1Kg of paraffin and the glue discharging temperature of 150 ℃; the second stage is a remilling process of the rubber compound; in the third section, 1.5Kg of sulfenamide accelerator, 0.5Kg of thiuram accelerator and 1.2Kg of sulfur are added, and the degumming temperature is 105 ℃. After standing for 4 hours, a sizing material was obtained.
And (3) extruding the tire component by using the rubber material, standing for 8 hours, then molding a tire blank, and finally vulcanizing the tire blank to obtain the final tire.
Comparative examples 1 to 3
The formulations are shown in Table 2, and Table 2 is a table of formulations of rubber compositions provided for comparative examples.
TABLE 2 formulation table of rubber compositions provided in comparative examples
The compounds of comparative examples 1 to 3 and tires were prepared according to the method of example 1 and the performance measurements were carried out, the results of which are shown in table 1.
Comparative example 4
A tire having a tire size of 205/55R16.91V manufactured by Wanli tire industries, Ltd was prepared in the same manner as in example 1.
The properties of the compound provided in comparative example 4 and of the tire were determined and the results are given in table 1.
From the data, the rubber material is prepared in the embodiment of the invention, the rubber material is processed by using a 3-stage mixing process to prepare the tire, and through tests on hardness, breaking, tensile strength, resilience, tearing strength, tire rolling resistance and tire road abrasion, the data of the hardness, breaking, tensile strength, resilience and tearing strength of the tire prepared by the composition are all similar to those of a common low rolling resistance tire, the tire abrasion performance is improved to a higher extent compared with the common tire, and meanwhile, the rolling resistance is reduced to a certain extent.
From the results of the comparative examples, the rolling resistance is reduced when ordinary silica is used with mercaptosilane, but the abrasion performance is poor, the abrasion is obviously improved when high-specific-surface-area silica is used with ordinary silane coupling agent, but the rolling resistance is higher, when only natural rubber is used, the rolling resistance is not changed much compared with the ordinary low-rolling-resistance tire, the abrasion performance is improved, and the improvement range is not as large as that of the scheme of combining multiple rubber types.
According to the invention, through the cooperation and synergism of different rubber proportions and the high-specific surface area silica and the silane coupling agent, the rubber has higher wear resistance and keeps lower rolling resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A rubber composition for a tire, comprising:
10-20 parts by mass of natural rubber;
30-80 parts by mass of solution polymerized styrene-butadiene rubber;
10-20 parts by mass of butadiene rubber;
30-60 parts by mass of high specific surface area silica;
2.4-9 parts by mass of a mercaptosilane coupling agent Si 363;
0 to 30 parts by mass of a reinforcing agent;
4-52 parts by mass of an auxiliary agent.
2. The rubber composition for a tire according to claim 1, wherein the auxiliary agent comprises:
0-30 parts by mass of a rubber process oil;
2-4 parts by mass of zinc oxide;
1-3 parts by mass of stearic acid;
0-6 parts by mass of an antioxidant;
0 to 4 parts by mass of an accelerator;
0-3 parts by mass of paraffin wax;
1-2 parts by mass of sulfur.
3. The rubber composition for a tire according to claim 2, wherein the antioxidant comprises 0 to 3 parts by mass of a p-phenylenediamine antioxidant and 0 to 3 parts by mass of a quinoline antioxidant;
the accelerator comprises 0-2 parts by mass of sulfenamide accelerator and 0-2 parts by mass of thiuram accelerator.
4. The rubber composition for a tire according to claim 3, wherein the p-phenylenediamine-based antioxidant is selected from 6PPD or IPPD, the quinoline-based antioxidant is selected from TMQ, the sulfenamide-based accelerator is selected from TBBS, CBS or NOBS, and the thiuram-based accelerator is selected from TMTM, TMTD or TBzTD.
5. The rubber composition for a tire according to claim 1, wherein the high specific surface area silica has a specific surface area of 175 to 230m2/g。
6. The rubber composition for a tire as claimed in claim 1, wherein the vinyl content of the solution-polymerized styrene-butadiene rubber is 50% to 70%, the butadiene rubber is neodymium-based butadiene rubber and/or nickel-based butadiene rubber, the reinforcing agent is carbon black, and the carbon black accounts for 0% to 50% of the high specific surface area silica.
7. The rubber composition for a tire according to claim 1, wherein the mercaptosilane is used in an amount of 8% to 15% of the amount of the high specific surface area silica.
8. The rubber composition for a tire according to claim 1, wherein the mass ratio of the total amount of the natural rubber, the butadiene rubber, the solution-polymerized styrene-butadiene rubber, the high specific surface area silica, the mercaptosilane coupling agent, and the reinforcing agent to the auxiliary is (150 to 190): (8-16).
9. A tire produced from the rubber composition for a tire according to any one of claims 1 to 8.
10. A method for manufacturing a tyre as claimed in claim 9, characterized in that it comprises the following steps:
A) placing natural rubber, solution polymerized styrene-butadiene rubber, a reinforcing agent, high-specific-surface-area silicon dioxide, a mercaptosilane coupling agent, rubber operating oil, zinc oxide, stearic acid, an anti-aging agent and paraffin into an internal mixer for mixing for a section to obtain primary rubber compound;
B) remilling the primary rubber compound to obtain a secondary rubber compound;
C) mixing the secondary rubber compound, an accelerator and sulfur for three times to obtain a rubber material;
D) and extruding the rubber material, molding the tire blank and vulcanizing the tire blank to obtain the tire.
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| CN108164847A (en) * | 2018-01-24 | 2018-06-15 | 万力轮胎股份有限公司 | A kind of base rubber and rubber composition for tire sidewall |
| CN109161064B (en) * | 2018-09-10 | 2021-03-19 | 肇庆骏鸿实业有限公司 | Low-heat-generation tire support rubber and preparation method and application thereof |
| CN112778581B (en) * | 2021-01-28 | 2022-03-29 | 中北大学 | Low rolling resistance wet-skid modified natural rubber composite material and preparation method thereof |
| CN114621504A (en) * | 2022-02-28 | 2022-06-14 | 青岛双星轮胎工业有限公司 | Low-Voc spare tire tread rubber composition and preparation method thereof |
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| CN1541245A (en) * | 2001-08-13 | 2004-10-27 | �����ּ�����˾ | Diena rubber compsn. for tyres comprising specific silicon as reinforcing filler |
| CN105801942A (en) * | 2016-04-21 | 2016-07-27 | 江苏华安橡胶科技有限公司 | Formula of tread rubber of low-rolling-resistance semi-steel radial tire |
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| DE19704464A1 (en) * | 1997-02-06 | 1998-08-13 | Continental Ag | Rubber compound for tire treads |
| CN101792545B (en) * | 2010-03-04 | 2012-04-11 | 杭州中策橡胶有限公司 | Tread rubber glue stock of tyre with low rolling resistance and tyre adopting tread rubber |
| CN103435872B (en) * | 2013-08-09 | 2015-07-15 | 山东永泰化工有限公司 | Radial tire crown rubber for high-speed passenger car |
| CN105670062A (en) * | 2016-01-27 | 2016-06-15 | 北京化工大学 | Wear-resistant tire tread rubber material with high wet skid resistance, low rolling resistance and high performance |
| CN106279797B (en) * | 2016-07-18 | 2019-01-29 | 郑兴荣 | A kind of Low-rolling-resistantire tire tread rubber composition and its tire of manufacture |
| CN106366386B (en) * | 2016-08-30 | 2019-01-18 | 安徽佳通乘用子午线轮胎有限公司 | The ultralow tread rubber composition for rolling resistance, high wet-sliding resistant riding radial tire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1541245A (en) * | 2001-08-13 | 2004-10-27 | �����ּ�����˾ | Diena rubber compsn. for tyres comprising specific silicon as reinforcing filler |
| CN105801942A (en) * | 2016-04-21 | 2016-07-27 | 江苏华安橡胶科技有限公司 | Formula of tread rubber of low-rolling-resistance semi-steel radial tire |
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