CN115322460B - High-performance tire tread rubber composition, mixing method thereof and prepared tire - Google Patents
High-performance tire tread rubber composition, mixing method thereof and prepared tire Download PDFInfo
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- CN115322460B CN115322460B CN202211127985.5A CN202211127985A CN115322460B CN 115322460 B CN115322460 B CN 115322460B CN 202211127985 A CN202211127985 A CN 202211127985A CN 115322460 B CN115322460 B CN 115322460B
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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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- 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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- 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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- Tires In General (AREA)
Abstract
The invention relates to the field of manufacturing of car tires, and relates to a high-performance tire tread rubber composition, a mixing method thereof and a prepared tire. A high-performance tire tread rubber composition comprises a rubber component, a reinforcing material, a processing aid and a vulcanizing agent, wherein the rubber component comprises 30-50% of styrene in a polymer, 20-55% of vinyl in butadiene in styrene-butadiene rubber A, 2.0-6.0 of LCB index of the styrene-butadiene rubber A and 500000-1500000 of weight average molecular weight; and styrene-butadiene rubber A contains a plurality of synthetic rubbers with long chain branches, and each rubber molecule contains at least 3 alkoxy silane groups which can interact with white carbon black at the tail end. The composition improves the wear performance of high performance tires, improves the dry braking performance and wet braking performance of the tires, maintains the rolling resistance of the tires, and achieves a high balance of the above-mentioned tire performances.
Description
Technical Field
The invention relates to the field of manufacturing of car tires, and relates to a high-performance tire tread rubber composition, a mixing method thereof and a prepared tire.
Background
The tire is a direct contact part between a vehicle and the ground, has direct influence on the safety performance of the vehicle, and is required to have excellent dry braking performance and wet braking performance; in addition, people have stronger awareness of environmental protection, and are required to reduce the emission of carbon dioxide, so that higher requirements are put on the fuel efficiency of vehicles, and the rolling resistance of tires is required to be reduced; at the same time, higher demands are also being made on the wear performance of the tires. But the above mentioned tire properties conflict with each other.
In the prior art, a large amount of white carbon black is added into the tread rubber material to provide excellent dry braking performance and wet braking performance for the tire, but the dispersion of the white carbon black in the rubber material is poor due to the simple addition of a large amount of white carbon black, and the rolling resistance and abrasion performance of the tire can be negatively influenced; a large amount of butadiene rubber is added into the rubber material to improve the abrasion performance of the rubber material, but the dispersibility of the white carbon black in the rubber material can be reduced when the white carbon black rubber material is used in a large amount, and the dry braking performance, the wet braking performance and the rolling resistance of the tire are negatively influenced.
The market demand has placed higher performance demands on various tires, particularly high performance tires, requiring a higher balance of tire performance as described above.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a high-performance tire tread rubber composition which enhances wear performance of a high-performance tire, improves dry braking performance and wet braking performance of the tire, maintains rolling resistance of the tire, and achieves a high balance of the above-mentioned tire performances.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the mixing formula of the high-performance tire tread rubber composition comprises a rubber component, a reinforcing material, a processing aid and a vulcanizing agent, wherein the rubber component, the resin and the reinforcing material consist of the following raw material components in parts by weight, based on 100 parts by weight of the rubber component:
the rubber A is styrene-butadiene rubber A, the styrene content in the styrene-butadiene rubber A is 30-50% in the polymer, the vinyl content in the butadiene is 20-55%, the LCB index of the styrene-butadiene rubber A is 2.0-6.0, and the weight average molecular weight is 500000-1500000; and styrene-butadiene rubber A contains a plurality of synthetic rubbers with long-chain branches, and each rubber molecule contains at least 3 alkoxy silane groups which can interact with white carbon black at the tail end;
the rubber B is selected from one or two of styrene butadiene rubber B and butadiene rubber C, wherein the styrene content in the polymer in the styrene butadiene rubber B is 5% -25%, the vinyl content in the butadiene is 20-60%, and the LCB index of the styrene butadiene rubber B is-1.5 to-0.1; the vinyl content of the butadiene rubber C is 3-25%, the molecular chain end of the butadiene rubber is modified, and the modified group contains an alkoxy silane group which can interact with white carbon black.
Preferably, the rubber component, the resin and the reinforcing material are composed of the following raw material components in parts by weight, based on 100 parts by weight of the rubber component:
preferably, styrene-butadiene rubber A is styrene-butadiene rubber R1441, a product of Asahi chemical Co., ltd; styrene-butadiene rubber B is styrene-butadiene rubber NS612, a product of Japanese rayleigh company; butadiene rubber C is BR1261, a product of Japanese rayleigh company; the resin was resin 4401, a product of koteng polymers inc.
Preferably, the carbon black is high wear-resistant or medium super wear-resistant carbon black reinforced rubber, the particle diameter of the carbon black is 20-40nm, the iodine absorption value is 80-160 g/kg, and the compression oil absorption value is 90-15010 -5 m 3 Per kg, CTAB adsorption specific surface area of 90-150 3 m 2 /kg; the nitrogen adsorption specific surface area (BET) of the white carbon black is 120m 2 /g-260m 2 /g。
Preferably, the silane coupling agent is one or two or a mixture of three of bis (gamma-triethoxysilylpropyl) tetrasulfide, bis (gamma-triethoxysilylpropyl) disulfide and sulfhydryl silane coupling agent.
Preferably, the resin is one or a mixture of two or more of C5, C5/C9, DCPD/C9, terpene phenols (terpene, terpene phenol), aromatic hydrocarbons (styrene, alpha-methyl styrene).
Preferably, the compounding formulation of the rubber composition further comprises 0.1 to 3 parts of an organic sulfur donor, and more preferably, 0.1 to 2.0 parts; still more preferably, the organic sulfur donor is one or a mixture of two or more of a thiuram accelerator and a dithioformate accelerator.
Preferably, the mixing formula of the rubber composition further comprises 1.0-3.0 parts of zinc oxide; 1.0 to 3.0 parts of stearic acid; 6PPD1.0-3.0 parts; 1.0-3.0 parts of protective wax; 0.8-2.0 parts of sulfur, 1.5-3.0 parts of accelerator CZ, 0.1-1.5 parts of accelerator TBzTDI and 0.1-1.5 parts of accelerator TPZ.
Further, the invention also discloses a mixing method of the high-performance tire tread rubber composition, which comprises the following steps:
step 1, mixing, namely mixing all materials except the vulcanizing agent and the accelerator by an internal mixer, and adding the materials into the internal mixer for mixing for 180-300 seconds at the temperature of 130-170 ℃ to obtain a mixture Q;
and 2, mixing by an internal mixer, and mixing the mixture Q, the accelerator and the vulcanizing agent together to obtain the final tread rubber composition Y.
The invention further discloses a high-performance tire, and the tread of the tire is prepared by vulcanizing the high-performance tire tread rubber composition.
By adopting the technical scheme, the high-performance tire using the rubber composition has improved abrasion performance, improves dry braking performance and wet braking performance of the tire, maintains rolling resistance of the tire, and achieves high balance of the tire performances.
Detailed Description
Comparative examples and examples of the present invention are shown in table 1:
1. butadiene rubber, BR, cis (Cis) butadiene, 94.5% of the total polymer weight, petroleum and Daqing petrochemical company product;
2. butadiene rubber, BR1261, vinyl mass 10% of the total polymer weight, japanese rayleigh company;
3. styrene butadiene rubber A, R1441, styrene mass 40% of total polymer weight, vinyl 40% of total butadiene weight, LCB index 3.09, product of Asahi chemical Co., ltd;
4. styrene butadiene rubber B, NS612, styrene mass 10% of the total polymer weight, vinyl 30% of the total butadiene weight, LCB index-0.45, product of Japanese rayleigh company;
5. styrene-butadiene rubber E581, wherein the mass of styrene accounts for 35% of the total weight of the polymer, and vinyl accounts for 40% of the total weight of butadiene; the present Xudi chemical company product;
6. carbon black 1165mp, bet=165 m 2 G, sortv chemical product;
7. carbon black N234, a product of the Hangzhou middling clean spring industry Co., ltd;
8. alkane coupling agent Si747, jiangsu kylin chemical products;
9. rubber processing oil V700, ningbo Hansheng chemical Co., ltd;
10. a resin 4401,Kraton Corporationn;
11. sulfur S200-10, tin-free Huasheng rubber New Material technology Co., ltd
12. Promoter CZ, product of Shandong Shun chemical industry Co., ltd
13. Accelerator TBzTD, jiangsu Lian Chemie Co., ltd
14. Accelerator TPZ, jiangsu kylin chemical products
15. The remaining materials: 2.0 parts of zinc oxide; 2.0 parts of stearic acid; 6PPD 2.0 parts; 2.0 parts of protective wax;
TABLE 1
Table 1, below
The mixing preparation method of the comparative example and the embodiment comprises the following steps:
step 1, mixing, namely mixing all materials except the vulcanizing agent and the accelerator by an internal mixer, and adding the materials into the internal mixer for mixing for 180-300 seconds at the temperature of 130-170 ℃ to obtain a mixture Q;
and 2, mixing by an internal mixer, and mixing the mixture Q, the accelerator and the vulcanizing agent together to obtain the final tread rubber composition Y.
Method for evaluating performance
Abrasion performance
The abrasion performance is characterized by abrasion loss, the lower the abrasion loss is, the better the abrasion performance is, the abrasion loss is tested according to GB/T1689, and the abrasion index is shown in a formula (I):
viscoelastic Performance test
The test equipment was a VR-7120 dynamic thermo-mechanical analysis manufactured by UESHIMA corporation, japan
The test condition is that the frequency is 20Hz, the dynamic strain is 0.25%, and the test temperature is carried out;
the dry land property is characterized by an index of Tan delta at 30 ℃, and the larger the value is, the better the dry land property is, and the index of Tan delta at 30 ℃ is shown in a formula (II).
The wetland performance is characterized by an index of 0 ℃ E ', and the larger the numerical value is, the better the wetland performance is, and the index of 0 ℃ E' is shown in a formula (III).
The rolling resistance is characterized by the index of Tan delta at 60 ℃ of the mixture, the lower the value, the lower the rolling resistance, the rolling resistance index is shown in formula (four):
LCB index test method
LCB index-long chain branching index. The higher the LCB index value, the higher the degree of long chain branching of the rubber. The smaller the LCB index value, the lower the degree of long chain branching of the rubber. The test equipment was TA Instruments RPA Elite.
Test conditions: the test temperature is 120 ℃, the test frequency is 0.2Hz, the test angle is 0.9-90 degrees, and the LCB index takes a value of 59 degrees.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. The high-performance tire tread rubber composition comprises a rubber component, a reinforcing material, a processing aid and a vulcanizing agent, and is characterized in that the rubber component, the resin and the reinforcing material consist of the following raw material components in parts by weight, based on 100 parts by weight of the rubber component:
60-80 parts of styrene-butadiene rubber A;
20-40 parts of butadiene rubber;
0-30 parts of carbon black;
50-120 parts of white carbon black;
5.0-20 parts of silane coupling agent;
5.0-40 parts of resin;
styrene-butadiene rubber A is styrene-butadiene rubber R1441, a product of Japan Asahi chemical Co., ltd, wherein styrene accounts for 40% of the total weight of the polymer, vinyl accounts for 40% of the total weight of butadiene, and LCB index is 3.09; the styrene-butadiene rubber A contains a plurality of synthetic rubbers with long chain branches, and each rubber molecule contains at least 3 alkoxy silane groups which can interact with white carbon black at the tail end; butadiene rubber C is BR1261, the product of Japanese Rui Wen company, the mass of vinyl accounts for 10% of the total weight of the polymer, and the molecular chain terminal of the butadiene rubber is modified, and the modified group contains alkoxy silane groups which can interact with white carbon black;
the carbon black adopts high wear-resistant or medium super wear-resistant carbon black, the grain diameter of the carbon black is 20-40nm, the iodine absorption value is 80-160 g/kg, and the compression oil absorption value is 90-150 multiplied by 10 -5 m 3 Per kg, CTAB adsorption specific surface area 90-150 x 10 3 m 2 /kg; the nitrogen adsorption specific surface area (BET) of the white carbon black is 120m 2 /g-260m 2 /g；
The silane coupling agent is one or two or a mixture of three of bis (gamma-triethoxysilylpropyl) tetrasulfide, bis (gamma-triethoxysilylpropyl) disulfide and sulfhydryl silane coupling agent;
the resin is one or two or more of C5, C5/C9, DCPD/C9, terpenes and aromatic hydrocarbon.
2. The high-performance tire tread rubber composition as claimed in claim 1, wherein the rubber component, the resin and the reinforcing material are composed of the following raw material components in parts by weight, based on 100 parts by weight of the rubber component:
65-75 parts of styrene-butadiene rubber A;
25-35 parts of butadiene rubber;
1.0 to 10 parts of carbon black;
60-100 parts of white carbon black;
6.0 to 12 parts of silane coupling agent;
10-30 parts of resin.
3. A high performance tire tread rubber composition as in claim 1 wherein the terpenes are terpene phenols; the aromatic hydrocarbon is styrene or alpha-methyl styrene.
4. A high performance tire tread rubber composition as in claim 1 wherein the terpenes are terpene phenols.
5. A high performance tire tread rubber composition as in claim 1 wherein the resin is resin 4401, a product of koteng polymers.
6. The high performance tire tread rubber composition of claim 1 wherein the compounding formulation of the rubber composition further comprises 0.1 to 3 parts of an organic sulfur donor.
7. The high performance tire tread rubber composition of claim 1 wherein the compounding formulation of the rubber composition further comprises 0.1 to 2.0 parts of an organic sulfur donor.
8. The high performance tire tread rubber composition as in claim 6 or 7, wherein the organic sulfur donor is one or a mixture of two or more of thiuram type accelerators and dithioformate type accelerators.
9. A high performance tire tread rubber composition according to claim 1 or 2, wherein the compounding formulation of the rubber composition further comprises 1.0-3.0 parts zinc oxide; 1.0 to 3.0 parts of stearic acid; 1.0-3.0 parts of 6 PPD; 1.0-3.0 parts of protective wax; 0.8-2.0 parts of sulfur, 1.5-3.0 parts of accelerator CZ, 0.1-1.5 parts of accelerator TBzTD and 0.1-1.5 parts of accelerator TPZ.
10. A method of compounding a high performance tire tread rubber composition according to any one of claims 1 to 9, comprising the steps of:
step 1, mixing, namely mixing all materials except the vulcanizing agent and the accelerator by an internal mixer, and adding the materials into the internal mixer for mixing for 180-300 seconds at the temperature of 130-170 ℃ to obtain a mixture Q;
and 2, mixing by an internal mixer, and mixing the mixture Q, the accelerator and the vulcanizing agent together to obtain the final tread rubber composition Y.
11. A high performance tire, wherein the tread of the tire is prepared by vulcanizing a high performance tire tread rubber composition as claimed in any one of claims 1 to 9.
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| JP5763606B2 (en) * | 2012-11-08 | 2015-08-12 | 住友ゴム工業株式会社 | Rubber composition for tread and pneumatic tire |
| CN109134978A (en) * | 2018-07-24 | 2019-01-04 | 浦林成山（青岛）工业研究设计有限公司 | A kind of high-performance tire tread mix and preparation method thereof and tire |
| JP7004025B2 (en) * | 2020-05-29 | 2022-01-21 | 横浜ゴム株式会社 | Rubber composition for tires and tires |
| CN112409662B (en) * | 2020-11-16 | 2023-12-22 | 四川轮胎橡胶（集团）股份有限公司 | Composition for preparing rubber compound, preparation method of rubber compound and tire |
| CN113462049B (en) * | 2021-07-20 | 2023-04-25 | 正新橡胶（中国）有限公司 | Rubber composition for tread and preparation method thereof |
| CN114230884B (en) * | 2021-12-28 | 2023-08-29 | 中策橡胶集团股份有限公司 | High-performance car tire tread rubber composition, mixing method thereof and car tire |
| CN114957820B (en) * | 2022-04-27 | 2023-08-29 | 中策橡胶集团股份有限公司 | Tread rubber composition, mixing method and application thereof, and tire |
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