CN110172190B - High-pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire tread rubber and synthesis method thereof - Google Patents
High-pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire tread rubber and synthesis method thereof Download PDFInfo
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- CN110172190B CN110172190B CN201910267231.1A CN201910267231A CN110172190B CN 110172190 B CN110172190 B CN 110172190B CN 201910267231 A CN201910267231 A CN 201910267231A CN 110172190 B CN110172190 B CN 110172190B
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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
- 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
- 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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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tyre Moulding (AREA)
Abstract
The invention discloses a high pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire tread rubber which comprises, by weight, 13-17% of butadiene rubber, 0.8-1.5% of solution-polymerized styrene-butadiene rubber NS 61612-16% of oil-extended high styrene content solution-polymerized styrene-butadiene rubber SSBR-344-3C 22-28%, 27-33% of medium and ultra-wear-resistant furnace black, 0.4-0.8% of anti-aging agent 6PPD, 0.4-0.8% of microcrystalline wax, 0.4-0.8% of anti-aging agent RD, 1.4-2.0% of active agent ZnO, 0.5-0.9% of active agent SA, 11021.8-2.5% of tackifier, 0.3-0.7% of peptizer, 0.0-8.0% of high-grip resin LS GRIP RESIN 6.0, 0.0-8.0% of anti-aging agent TT 0.07-0.1% and 0.4-0.7% of accelerator DM, wherein the sum of the content of all components is 100%, and a high pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire rubber synthesis method is also provided, through the formula and the synthesis method, the grip force and the control performance in the high-speed driving process can be obviously improved, the safety is ensured, the service life of the tire is greatly prolonged, and the riding experience is effectively improved.
Description
Technical Field
The invention relates to the field of tire manufacturing, in particular to a motorcycle hot-melt tire tread rubber with high resistance to pattern groove bottom cracking and a synthesis method thereof.
Background
The motorcycle is taken as a tool for riding instead of walk for people, has the characteristics of time saving, labor saving, convenient operation and the like, is deeply welcomed by people, and along with the continuous development of the transportation industry, the motorcycle industry also presents diversified development trend to a certain extent, the use requirement is synchronously improved, and simultaneously, the motorcycle tire has higher requirement on riding experience, and the motorcycle tire is the only bridge for contacting the ground with a vehicle, so the development of high-end motorcycle tires is more and more necessary.
The motorcycle tire can be divided into a common non-hot-melt tire and a hot-melt tire according to the materials, the tire generates heat by rubbing with the ground in the rotating process, for the common non-hot-melt tire, the grip force is poor after the temperature of the tire rises at a high rotating speed, and the control performance is not good enough, so that the hot-melt tire is appeared, the melting point of the hot-melt tire is relatively low, the surface of the tire can be easily in a softened or colloid state when the heat is generated by rubbing with the ground, the friction force of the softened rubber is greatly increased, and the hot-melt tire can provide excellent grip force for a vehicle.
In the prior art, the hot melt tire mainly comprises styrene butadiene rubber, a compounding agent, a vulcanizing agent and the like, wherein the styrene butadiene rubber can be divided into emulsion styrene butadiene rubber and solution polymerized styrene butadiene rubber according to different production processes, the emulsion styrene butadiene rubber is mostly used for the hot melt tire of a common motorcycle, the tire produced by the emulsion styrene butadiene rubber has good wet skid resistance, but after the tire is driven for a period of time, the bottom of a pattern groove is easy to crack, and the safety and the performance of the tire are adversely affected.
Disclosure of Invention
The invention mainly solves the technical problem of providing a high-pattern-resistance groove bottom cracking motorcycle hot-melt tire tread rubber and a synthesis method thereof, and the high-pattern-resistance groove bottom cracking motorcycle hot-melt tire tread rubber developed by experimental comparison of the types and the use amounts of different materials such as butadiene rubber, solution-polymerized styrene-butadiene rubber NS616, oil-filled high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, medium-super wear-resistant furnace black, an anti-aging agent and the like can remarkably improve the ground holding power in the high-speed driving process, control the performance, ensure the safety, greatly improve the service life of a tire and effectively improve the riding experience.
In order to solve the technical problems, the invention adopts a technical scheme that: the high pattern groove bottom crack resistance motorcycle hot-melt tire tread rubber comprises, by weight, 13-17% of butadiene rubber, 61612-16% of solution-polymerized styrene-butadiene rubber NS, 22-28% of oil-extended high styrene content solution-polymerized styrene-butadiene rubber SSBR-344-3C, 27-33% of medium super abrasion-resistant furnace black, 0.8-1.5% of anti-aging agent 6PPD, 0.4-0.8% of microcrystalline wax, 0.4-0.8% of anti-aging agent RD, 1.4-2.0% of active agent ZnO, 0.5-0.9% of active agent SA, 11021.8-2.5% of tackifier, LS GRIP RESIN 6.0.0-8.0% of high grip resin, 0.6-0.9% of vulcanizing agent, 0.07-0.1% of accelerator TT and 0.4-0.7% of accelerator DM, wherein the sum of the contents of all components is 100%.
Preferably, the ratio of the parts of the cis-butadiene rubber to the parts of the solution-polymerized styrene-butadiene rubber NS616 is at least 1: 1.
Through the technical scheme, the elasticity of the rubber material can be improved, the mechanical property is improved, the flexing resistance is improved, the flexing times can reach more than 20 ten thousand times, the wear resistance is excellent, the good fatigue crack expansion resistance and the cutting resistance are ensured, and the problem of cracking of the groove bottom of the patterns is effectively improved.
Preferably, the ratio of the oil-extended high styrene content solution polymerized styrene-butadiene rubber SSBR-344-3C to the butadiene rubber fraction is at least 1.5: 1.
Through the technical scheme, the wet-skid resistance of the rubber material can be improved, the service life of the rubber material is prolonged, the heat generation and the hysteresis loss of vulcanized rubber are reduced, the rubber is endowed with excellent wear resistance, and the grip is obviously improved.
Preferably, the ratio of the high-grip resin LS GRIP RESIN to the medium-super abrasion furnace black fraction is at least 1: 4.3.
Through above-mentioned technical scheme, can effectively promote the land fertility and the intensity of grabbing of sizing material, improve the crackle at the bottom of the decorative pattern groove simultaneously and split, in addition, well super wear-resisting stove black and butadiene rubber can promote the wear-resisting mechanical properties of goods.
Preferably, the ratio of the antioxidant 6PPD to the antioxidant RD parts is at least 1.7: 1.
By adopting the technical scheme, the aging resistance of the formula can be ensured, the cracking of the groove bottom of the pattern can be improved, and the service life of the tire can be prolonged.
Preferably, the motorcycle hot-melt tire tread rubber with high resistance to pattern bottom cracking further comprises a peptizer.
Through the technical scheme, the rubber material plasticizing effect is effectively improved, the rubber material processing energy consumption is reduced, and the vulcanized rubber wear resistance and dynamic mechanical property are improved.
Preferably, the content of the peptizer is 0.3-0.7%.
By adopting the technical scheme, the dispersibility of the formula is improved, and the optimal effect is achieved.
The invention has the beneficial effects that: the invention provides a high-pattern-resistance groove bottom crack motorcycle hot-melt tire tread rubber and a synthesis method thereof, the high-pattern-resistance groove bottom crack motorcycle hot-melt tire tread rubber developed by comparing test parameters of different material types and use amounts of butadiene rubber, solution polymerized styrene-butadiene rubber NS616, oil-filled high-styrene-content solution polymerized styrene-butadiene rubber SSBR-344-3C, medium and super wear-resistant furnace black, an anti-aging agent and the like can remarkably improve the grip force in the high-speed driving process and the control performance, ensure the safety, greatly improve the service life of a tire and effectively improve the riding experience of a motorcycle.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention and to clearly and unequivocally define the scope of the present invention.
Example 1:
the raw material components are as follows: 28.6 parts of butadiene rubber, 26.4 parts of solution-polymerized styrene-butadiene rubber NS616, 48.4 parts of oil-extended high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, 59.4 parts of medium-and-super-abrasion furnace black, 1.76 parts of antioxidant 6PPD, 0.88 parts of microcrystalline wax, 0.88 parts of antioxidant RD, 3.08 parts of active agent ZnO, 1.1 parts of active agent SA, 3.96 parts of tackifier 1102, 0.66 parts of peptizer, 13.2 parts of high-grip resin LS GRIP RESIN, 1.32 parts of vulcanizing agent, 0.15 parts of accelerator TT and 0.88 parts of accelerator DM.
The preparation process comprises the following steps: (this procedure was carried out in a 270L Banbury mixer)
The first step is as follows: adding butadiene rubber, solution-polymerized styrene-butadiene rubber NS616, oil-extended high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, medium and super wear-resistant furnace black, antioxidant 6PPD, microcrystalline wax, antioxidant RD, activator ZnO, activator SA, tackifier 1102, peptizer and high-grip resin LS GRIP RESIN, mixing for 40-50 seconds, at a mixing temperature of 80 ℃ and under a pressure of 0.51 MPa.
The second step is that: the upper plug was lifted and further kneaded for 95 seconds at a temperature of 160 ℃ under a pressure of 0.51 MPa.
The third step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
The fourth step: refining the mixed rubber prepared in the third step once, wherein the refining time is 70 seconds, the refining temperature is 160 ℃, and the pressure is 0.51 Mpa.
The fifth step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
And a sixth step: and (3) adding the cooled rubber sheet, the vulcanizing agent, the accelerator TT and the accelerator DM in the fifth step, mixing for 70 seconds at the mixing temperature of 95 ℃ and under the pressure of 0.51 MPa.
The seventh step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
Eighth step: and (4) extruding the cooled rubber sheet in the seventh step to form the tread with the required shape.
Example 2:
the raw material components are as follows: 34.0 parts of butadiene rubber, 30.0 parts of solution-polymerized styrene-butadiene rubber NS616, 54.0 parts of oil-extended high styrene content solution-polymerized styrene-butadiene rubber SSBR-344-3C, 67.0 parts of medium and super abrasion furnace black, 2.5 parts of antioxidant 6PPD, 1.4 parts of microcrystalline wax, 1.4 parts of antioxidant RD, 3.5 parts of active agent ZnO, 1.6 parts of active agent SA, 4.5 parts of tackifier 1102, 1.0 part of peptizer, 15.0 parts of high-grip resin LS GRIP RESIN, 1.75 parts of vulcanizing agent, 0.19 parts of accelerator TT and 1.21 parts of accelerator DM.
The preparation process comprises the following steps: (this procedure was carried out in a 270L Banbury mixer)
The first step is as follows: adding butadiene rubber, solution-polymerized styrene-butadiene rubber NS616, oil-extended high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, medium and super wear-resistant furnace black, antioxidant 6PPD, microcrystalline wax, antioxidant RD, activator ZnO, activator SA, tackifier 1102, peptizer and high-grip resin LS GRIP RESIN, mixing for 40-50 seconds, at the mixing temperature of 90 ℃ and under the pressure of 0.55 MPa.
The second step is that: and lifting the upper top plug and mixing for 100 seconds at the mixing temperature of 165 ℃ and the pressure of 0.55 MPa.
The third step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
The fourth step: refining the mixed rubber prepared in the third step once, wherein the refining time is 75 seconds, the refining temperature is 165 ℃, and the pressure is 0.55 Mpa.
The fifth step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
And a sixth step: and (3) adding the cooled rubber sheet, the vulcanizing agent, the accelerator TT and the accelerator DM in the fifth step, mixing for 75 seconds at the mixing temperature of 105 ℃ and under the pressure of 0.55 MPa.
The seventh step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
Eighth step: and (4) extruding the cooled rubber sheet in the seventh step to form the tread with the required shape.
Example 3:
the raw material components are as follows: 37.4 parts of butadiene rubber, 35.2 parts of solution-polymerized styrene-butadiene rubber NS616, 61.6 parts of oil-extended high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, 72.6 parts of medium-high abrasion furnace black, 3.3 parts of antioxidant 6PPD, 1.76 parts of microcrystalline wax, 1.76 parts of antioxidant RD, 4.4 parts of active agent ZnO, 1.98 parts of active agent SA, 5.5 parts of tackifier 1102, 1.54 parts of peptizer, 17.6 parts of high-grip resin LS GRIP RESIN, 1.98 parts of vulcanizing agent, 0.22 part of accelerator TT and 1.54 parts of accelerator DM.
The preparation process comprises the following steps: (this procedure was carried out in a 270L Banbury mixer)
The first step is as follows: adding butadiene rubber, solution-polymerized styrene-butadiene rubber NS616, oil-extended high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, medium and super wear-resistant furnace black, antioxidant 6PPD, microcrystalline wax, antioxidant RD, activator ZnO, activator SA, tackifier 1102, peptizer and high-grip resin LS GRIP RESIN, mixing for 40-50 seconds, at the mixing temperature of 100 ℃ and under the pressure of 0.59 MPa.
The second step is that: the upper plug was raised and further kneaded for 105 seconds at a kneading temperature of 170 ℃ under a pressure of 0.59 MPa.
The third step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
The fourth step: refining the mixed rubber prepared in the third step once, wherein the refining time is 70-80 seconds, the refining temperature is 170 ℃, and the pressure is 0.59 MPa.
The fifth step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
And a sixth step: and (3) adding the cooled rubber sheet, the vulcanizing agent, the accelerator TT and the accelerator DM in the fifth step, mixing for 70-80 seconds at the mixing temperature of 115 ℃ and under the pressure of 0.59 MPa.
The seventh step: and cooling the discharged sheet by a cooling water tank in a manner that the discharged sheet is cooled for 30min by a fan and then naturally cooled for 8H.
Eighth step: and (4) extruding the cooled rubber sheet in the seventh step to form the tread with the required shape.
The parameters associated with the tire tread compounds obtained as described above are shown in table 1.
Table 1: main technical indexes
As can be seen from table 1: compared with the common rubber material, the high-pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire tread rubber prepared by the invention has the advantages that the rolling resistance, the control capability under various environments, the wetland gripping capacity and the abrasion resistance are superior to those of the common rubber material, the hardness is basically consistent with that of the common rubber material, and the tensile strength, the elongation and the tear resistance are also obviously improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. The utility model provides a motorcycle hot melt tire tread rubber of high resistant decorative pattern ditch bottom checking which characterized in that: the high pattern-resistance groove bottom crack motorcycle hot-melt tire tread rubber comprises, by weight, 13-17% of butadiene rubber, 61612-16% of solution-polymerized styrene-butadiene rubber NS, 0.4-0.8% of oil-extended high styrene content solution-polymerized styrene-butadiene rubber SSBR-344-3C 22-28%, 27-33% of medium super wear-resistant furnace black, 0.8-1.5% of antioxidant 6PPD, 0.4-0.8% of microcrystalline wax, 0.4-0.8% of antioxidant RD, 1.4-2.0% of activator ZnO, 0.5-0.9% of activator SA, 11021.8-2.5% of tackifier, 6.0-8.0% of high-grip resin LS GRIP RESIN 6.0, 0.6-0.9% of vulcanizing agent, 0.07-0.1% of accelerator TT, 0.4-0.7% of accelerator DM and 0.3-0.7% of peptizer, wherein the sum of the content of all the components is 100%, the ratio of the NS616 parts of the butadiene rubber and the solution-polymerized styrene-butadiene rubber is at least 1:1, the ratio of the SSBR-344-3C of the oil-extended high-styrene-content solution polymerized styrene-butadiene rubber to the parts of the butadiene rubber is at least 1.5: 1.
2. The motorcycle hot-melt tire tread rubber with high resistance to pattern groove bottom cracking as claimed in claim 1, is characterized in that: the ratio of the high-grip resin LS GRIP RESIN to the medium-super abrasion-resistant furnace black part is at least 1: 4.3.
3. The motorcycle hot-melt tire tread rubber with high resistance to pattern groove bottom cracking as claimed in claim 1, is characterized in that: the ratio of the antioxidant 6PPD to the antioxidant RD is at least 1.7: 1.
4. The synthesis method of the motorcycle hot-melt tire tread rubber with high resistance to pattern bottom cracking of the claim 1 is characterized in that: the synthesis steps are as follows,
the first step is as follows: adding butadiene rubber, solution-polymerized styrene-butadiene rubber NS616, oil-extended high-styrene-content solution-polymerized styrene-butadiene rubber SSBR-344-3C, medium and super wear-resistant furnace black, antioxidant 6PPD, microcrystalline wax, antioxidant RD, activator ZnO, activator SA, tackifier 1102, peptizer and high-grip resin LS GRIP RESIN, mixing for 40-50 seconds, at a mixing temperature of 80-100 ℃ and under a pressure of 0.51-0.59 MPa;
the second step is that: lifting the upper top plug and then mixing for 95-105 seconds at the mixing temperature of 160-170 ℃ and the pressure of 0.51-0.59 MPa;
the third step: cooling the discharged sheet by a cooling water tank in a manner that the sheet is cooled for 30min by a fan and then naturally cooled for 8H;
the fourth step: refining the mixed rubber prepared in the third step once, wherein the refining time is 70-80 seconds, the refining temperature is 160-170 ℃, and the pressure is 0.51-0.59 MPa;
the fifth step: cooling the discharged sheet by a cooling water tank in a manner that the sheet is cooled for 30min by a fan and then naturally cooled for 8H;
and a sixth step: adding the cooled rubber sheet, the vulcanizing agent, the accelerator TT and the accelerator DM in the fifth step, mixing for 70-80 seconds at the mixing temperature of 95-115 ℃ and under the pressure of 0.51-0.59 MPa;
the seventh step: cooling the discharged sheet by a cooling water tank in a manner that the sheet is cooled for 30min by a fan and then naturally cooled for 8H;
eighth step: and (4) extruding the cooled rubber sheet in the seventh step to form the tread with the required shape.
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| CN201910267231.1A CN110172190B (en) | 2019-04-03 | 2019-04-03 | High-pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire tread rubber and synthesis method thereof |
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| CN201910267231.1A CN110172190B (en) | 2019-04-03 | 2019-04-03 | High-pattern-resistance groove bottom cracking-resistant motorcycle hot-melt tire tread rubber and synthesis method thereof |
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| CN110172190B true CN110172190B (en) | 2022-05-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103554583A (en) * | 2013-10-29 | 2014-02-05 | 中策橡胶集团有限公司 | Tread rubber sizing material of automobile race tire |
| CN104844860A (en) * | 2015-05-06 | 2015-08-19 | 青岛双星轮胎工业有限公司 | Semi-hot melting tread rubber composition for drifting tires for racing |
| CN106832474A (en) * | 2015-12-04 | 2017-06-13 | 住友橡胶工业株式会社 | Rubber composition for tire and pneumatic tire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009102507A (en) * | 2007-10-23 | 2009-05-14 | Toyo Tire & Rubber Co Ltd | Rubber composition for tire tread |
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- 2019-04-03 CN CN201910267231.1A patent/CN110172190B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103554583A (en) * | 2013-10-29 | 2014-02-05 | 中策橡胶集团有限公司 | Tread rubber sizing material of automobile race tire |
| CN104844860A (en) * | 2015-05-06 | 2015-08-19 | 青岛双星轮胎工业有限公司 | Semi-hot melting tread rubber composition for drifting tires for racing |
| CN106832474A (en) * | 2015-12-04 | 2017-06-13 | 住友橡胶工业株式会社 | Rubber composition for tire and pneumatic tire |
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