CN112300458A - Tread rubber composition for electric vehicle tire and tire - Google Patents
Tread rubber composition for electric vehicle tire and tire Download PDFInfo
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- CN112300458A CN112300458A CN201910663547.2A CN201910663547A CN112300458A CN 112300458 A CN112300458 A CN 112300458A CN 201910663547 A CN201910663547 A CN 201910663547A CN 112300458 A CN112300458 A CN 112300458A
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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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- 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
- C08L2205/02—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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- 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 relates to a tread rubber composition for electric vehicle tires and a tire, which comprises 35-55 wt% of a rubber component, 55-100 wt% of a filler, 5-15 wt% of an aromatic hydrocarbon polymer resin, 0.5-2.5 wt% of a guanidine accelerator and 1.5-5.5 wt% of a dispersant based on 100 wt% of the rubber component, wherein the rubber component comprises solution polymerized styrene-butadiene rubber, and the filler comprises white carbon black and carbon black, and the dispersant is selected from polyethylene glycol and N-hydroxyphthalimide. The rubber composition of the present invention exhibits low rolling resistance, good grip performance, excellent wet skid resistance, and excellent tensile strength, so that a tire comprising a tread rubber formed from the rubber composition has excellent properties of low rolling resistance, good grip performance, excellent wet skid resistance, small initial torque, and the like.
Description
Technical Field
The invention relates to a tread rubber composition for an electric vehicle tire and an electric vehicle tire, which comprises a tread rubber formed by the rubber composition.
Background
The electric automobile has the outstanding advantages of low noise, zero emission, comprehensive energy utilization and the like, is an important way for solving the problems of energy and environmental protection, is becoming the development trend of future automobiles, and draws the key attention of governments and automobile industries of various countries. Under the background, electric automobiles in China have been developed rapidly in recent years, and are applied in the fields of passenger vehicles and commercial vehicles in a large scale.
Although the electric automobile has a wide prospect, the electric automobile is still in the early stage of development, the overall market occupation ratio is not high, the requirement for special tires is not paid enough attention by a host factory, and the electric automobile is mainly matched with common green low rolling resistance tires.
As the only ground-contacting component of an automobile, the performance of tires directly impacts the safety, stability, and economy of an electric automobile. Due to the use characteristics of electric vehicles, ordinary tires cannot meet the use requirements of the vehicles, and have become obstacles to further development of the electric vehicles. The development of special tires suitable for electric vehicles has become an important mission of tire manufacturers, and has a very important meaning for promoting the development of the electric vehicle industry and reducing energy consumption.
The differences between electric vehicles and conventional vehicle models place special performance requirements on the tread rubber composition of the tire.
First, since the braking distance increases due to the increase in the weight of the electric vehicle, and the braking performance particularly on a wet road surface is an important factor concerning the running safety of the tire, a tire tread rubber composition having good wet skid resistance is required.
Secondly, the charging capacity of the electric automobile is limited due to the lag of the development of the battery technology, and the single charging duration is short. In order to reduce the power consumption of the battery and increase the endurance mileage, the tire for electric vehicles requires a tread rubber composition having a lower rolling resistance.
Thirdly, new electric motors are continuously introduced, resulting in changes in the aspects of steering, braking, driving, noise, etc. of electric vehicles. The motor has large initial torque, the vehicle is accelerated quickly, and the tire tread rubber composition is required to have better ground gripping performance, so that the tire is prevented from skidding, and the driving safety is guaranteed. This requires a good balance between grip and rolling resistance of the rubber composition for the tread of an electric vehicle tire.
Fourthly, due to the instantaneous torque of the electric motor and the extra weight of the battery, the tread rubber composition is required to have excellent mechanical properties, namely, the tensile strength is higher, and in order to obtain good dynamic mechanical properties, the tread rubber composition is usually made of modified solution polymerized styrene butadiene rubber with lower physical properties, which brings difficulties for formulation design.
Accordingly, it is an object of the present invention to provide a tread rubber composition for electric vehicle tires, which exhibits low rolling resistance, good grip, excellent wet skid resistance, and excellent tensile strength.
Disclosure of Invention
Summary of The Invention
The inventors of the present invention have found that the above object is achieved by the following means
1. A tread rubber composition for electric vehicle tires, comprising 35 to 55% by weight of a rubber component, and 55 to 100 parts by weight of a filler, 5 to 15 parts by weight of an aromatic hydrocarbon polymer resin, 0.5 to 2.5 parts by weight of a guanidine-based accelerator, 1.5 to 5.5 parts by weight of a dispersant, based on 100 parts by weight of the rubber component, wherein the rubber component comprises solution-polymerized styrene-butadiene rubber, and the filler comprises white carbon black and carbon black, and the dispersant is selected from polyethylene glycol and N-hydroxyphthalimide.
2. A rubber composition according to claim 1, wherein the amount of the rubber component is 40 to 50% by weight, more preferably 42 to 48% by weight.
3. The rubber composition according to claim 1 or 2, wherein the amount of the filler is 55 to 90 parts by weight, preferably 58 to 76 parts by weight, based on 100 parts by weight of the rubber component.
4. A rubber composition according to any one of claims 1 to 3, wherein the amount of the aromatic hydrocarbon polymer resin is from 6 to 10 parts by weight based on 100 parts by weight of the rubber component.
5. A rubber composition according to any one of claims 1 to 4, wherein the rubber component comprises solution polymerized styrene-butadiene rubber and butadiene rubber.
6. A rubber composition according to claim 5, wherein the weight ratio of solution-polymerized styrene-butadiene rubber and butadiene rubber is 95:5 to 70:30, preferably 95:5 to 85: 15.
7. A rubber composition according to any one of claims 1 to 6, wherein the weight ratio of white carbon black to carbon black is from 4.5:1 to 18:1, preferably from 4.8:1 to 17:1, more preferably from 10:1 to 15: 1.
8. The rubber composition according to any one of claims 1 to 7, wherein the amount of the dispersant is 1.8 to 5 parts by weight, preferably 3 to 4.5 parts by weight, based on 100 parts by weight of the rubber component.
9. The rubber composition according to any one of claims 1 to 8, wherein the rubber composition comprises 5 to 40 parts by weight, preferably 8 to 35 parts by weight, more preferably 8 to 15 parts by weight of a process oil, based on 100 parts by weight of the rubber component, preferably the process oil is an environmentally friendly aromatic oil.
10. A tire for electric vehicles, comprising a tread rubber formed from the rubber composition of any of claims 1-9.
Detailed Description
One aspect of the present invention relates to a tread rubber composition for electric vehicle tires, comprising 35 to 55 wt% of a rubber component, and 55 to 100 wt parts of a filler, 5 to 15 wt parts of an aromatic hydrocarbon polymer resin, 0.5 to 2.5 wt parts of a guanidine-based accelerator, 1.5 to 5.5 wt parts of a dispersant, based on 100 wt parts of the rubber component, wherein the rubber component comprises solution-polymerized styrene-butadiene rubber, and the filler comprises white carbon black and carbon black, and the dispersant is selected from polyethylene glycol and N-hydroxyphthalimide.
According to a preferred embodiment of the invention, the amount of the rubber component is 40 to 50% by weight, more preferably 42 to 48% by weight.
According to another embodiment of the present invention, the rubber component comprises solution polymerized styrene butadiene rubber and butadiene rubber.
The solution-polymerized styrene-butadiene rubber used in the present invention may have a styrene structural unit content of 20 to 45% by weight, preferably 25 to 40% by weight. In the rubber composition of the present invention, one or more solution-polymerized styrene-butadiene rubbers may be used.
In a preferred embodiment of the present invention, the vinyl content of the solution-polymerized styrene-butadiene rubber is from 28 to 65% by weight, preferably from 35 to 60% by weight, based on the amount of butadiene structural units in the solution-polymerized styrene-butadiene rubber.
In a preferred embodiment of the present invention, the solution-polymerized styrene-butadiene rubber has a Mooney viscosity ML1+4,100 ℃ of from 50 to 80, preferably from 55 to 76. The glass transition temperature Tg of the solution polymerized styrene-butadiene rubber is-35 to-20 ℃.
According to one embodiment of the present invention, the solution-polymerized styrene-butadiene rubber may also be an oil-extended solution-polymerized styrene-butadiene rubber. The amount of the oil-extended in the solution-polymerized styrene-butadiene rubber is 20 to 40 parts by weight, preferably 30 to 40 parts by weight, based on 100 parts by weight of the solution-polymerized styrene-butadiene rubber.
The extender oil for oil-extended solution-polymerized styrene-butadiene rubber may be a common aromatic oil or an environmentally friendly aromatic oil, preferably an environmentally friendly aromatic oil such as TDAE oil.
According to another embodiment of the present invention, the rubber component comprises solution polymerized styrene butadiene rubber and butadiene rubber.
The Mooney viscosity ML1+4 of the butadiene rubber usable in the present invention is 40 to 65, preferably 40 to 50 at 100 ℃. According to a preferred embodiment of the invention, the content of cis 1,4 structures is above 97% by weight.
According to a preferred embodiment of the present invention, in the rubber composition of the present invention, the weight ratio of the solution-polymerized styrene-butadiene rubber and the butadiene rubber is 95:5 to 70:30, preferably 95:5 to 85: 15.
According to one embodiment of the present invention, the amount of the filler is 55 to 90 parts by weight, preferably 58 to 76 parts by weight, based on 100 parts by weight of the rubber component.
According to the present invention, the filler used in the rubber composition of the present invention includes white carbon and carbon black. According to a preferred embodiment of the present invention, the weight ratio of white carbon black to carbon black is from 4.5:1 to 18:1, preferably from 4.8:1 to 17:1, more preferably from 10:1 to 15: 1.
White carbon useful in the present invention includes wet silica, dry silica, calcium silicate and aluminum silicate, and preferably wet silica.
The BET specific surface area (determined according to ISO 5794/1) of the wet silica can be 120 to 250m2/g, preferably 130 to 200m 2/g.
The carbon black may be chosen from those used as reinforcing fillers for rubbers. For example, SRF, GPF, FEF, HAF, ISAF and SAF are used, and HAF, ISAF and SAF are preferred. The carbon black may be used alone or in combination of two or more thereof.
According to the present invention, the rubber composition of the present invention comprises 6 to 10 parts by weight of the aromatic hydrocarbon polymer resin based on 100 parts by weight of the rubber component. The aromatic polymer resin used in the present invention has a softening point of 80 to 90 ℃ and a glass transition temperature of 30 to 40 ℃.
According to one embodiment of the present invention, the rubber composition of the present invention contains 1.8 to 5 parts by weight, preferably 3 to 4.5 parts by weight of a dispersant, based on 100 parts by weight of the rubber component. According to the invention, the dispersant is selected from polyethylene glycol and N-hydroxyphthalimide, preferably N-hydroxyphthalimide. The polyethylene glycol useful in the present invention may be, for example, PEG 4000.
According to a preferred embodiment of the present invention, the amount of the dispersant is 1.8 to 5 parts by weight, preferably 3 to 4.5 parts by weight, based on 100 parts by weight of the rubber component.
In a preferred embodiment of the present invention, wherein the rubber composition comprises 5 to 40 parts by weight, preferably 8 to 35 parts by weight, more preferably 8 to 15 parts by weight of a process oil, based on 100 parts by weight of the rubber component, preferably the process oil is an environmentally friendly aromatic oil.
In the rubber composition of the present invention, a guanidine accelerator is included in an amount of 0.5 to 2.5 parts by weight, preferably 0.7 to 2 parts by weight. Preferably, the guanidine accelerator is DPG (1, 3-diphenylguanidine).
In the rubber composition according to the present invention, various additives such as a vulcanizing agent, a vulcanization accelerator, an anti-aging agent, an anti-scorching agent, zinc oxide, stearic acid, and a protective wax may also be added.
The vulcanizing agent comprises sulfur; and is preferably used in an amount of 0.5 to 5 parts by weight, and more preferably 1 to 4 parts by weight in terms of sulfur content, relative to 100 parts by weight of the rubber component.
In addition to the guanidine accelerators mentioned above, other accelerators may be used, for example thiazoles such as M (2-mercaptobenzothiazole), DM (dibenzothiazyl disulfide) and CZ (N-cyclohexyl-2-benzothiazylsulfenamide). These accelerators are used in an amount of 1 to 2.5 parts by mass, preferably 1.5 to 2 parts by mass, relative to 100 parts by mass of the rubber component.
Examples of antioxidants that can be used include 6PPD [ N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine ], TMQ (2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer). The amount thereof is preferably 1 to 5 parts by weight, more preferably 1.5 to 3 parts by weight, relative to 100 parts by weight of the rubber component.
In a preferred embodiment, in the rubber composition of the present invention, a silane coupling agent is further included. Examples of the silane coupling agent include tetrasulfide compounds such as bis- [ γ - (triethoxysilyl) propyl ] tetrasulfide.
The silane coupling agent may be used in an amount of 2 to 8 parts by weight, preferably 3 to 7 parts by weight, based on 100 parts by weight of the rubber component.
In the rubber composition of the present invention, the zinc oxide used may be indirect zinc oxide. The amount thereof may be 2 to 6 parts by weight based on 100 parts by weight of the rubber component.
In the rubber composition of the present invention, stearic acid may be used in an amount of 1 to 5 parts by weight, preferably 1.5 to 3 parts by weight, based on 100 parts by weight of the rubber component.
The rubber composition according to the present invention can be prepared by mixing each of the above-mentioned components using an internal mixer.
Another aspect of the present invention relates to a tire for electric vehicles comprising a tread rubber formed from the rubber composition of the present invention.
The rubber composition of the present invention enables a tire including a tread rubber formed of the rubber composition to have excellent properties such as low rolling resistance and noise, light weight, high load capacity, good grip, excellent wet skid resistance and/or abrasion resistance.
The following examples are intended to illustrate the invention and should not be construed as limiting it.
Examples
Raw materials
Solution polymerized styrene-butadiene rubber 1(SSBR 1): styrene structural unit content 27 wt%; a vinyl content of 59% by weight based on the amount of butadiene structural units in the solution-polymerized styrene-butadiene rubber; tg of-27 ℃; mooney ML1+4,100 ℃: 56.
solution polymerized styrene-butadiene rubber 2(SSBR 2): styrene building block content 28 wt.%; a vinyl content of 59% by weight based on the amount of butadiene structural units in the solution-polymerized styrene-butadiene rubber; tg of-28 ℃; mooney ML1+4,100 ℃: 64.
solution polymerized styrene-butadiene rubber 3(SSBR 3): styrene building block content 38 wt%; a vinyl content of 40% by weight based on the amount of butadiene structural units in the solution-polymerized styrene-butadiene rubber; tg of-22 ℃; mooney ML1+4,100 ℃: 75; filling oil: 37.5 parts by weight of TDAE oil.
Butadiene rubber BR: yanshan petrochemical PBND-40.
White carbon black: zeosil 1165MP from SOLVAY corporation, BET surface area 140-.
Carbon black: n234 from CABOT, having a CTAB specific surface area of about 119m 2/g.
Aromatic hydrocarbon polymer resin: RICON330 is from Cray Vally.
Liquid Si 69: jiangxi Hongbai HP-669.
PEG4000 from Pasteur Germany.
NOP: n-hydroxyphthalimide.
StA is stearic acid.
Environmental protection oil TDAE: hensheng in Germany V500.
Protective wax 111: germany, Rhine.
Antioxidant 6 PPD: [ N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine ].
Accelerator DPG: 1, 3-diphenylguanidine.
Accelerator CZ: n-cyclohexyl-2-benzothiazolesulfenamide.
Test method
Equipment used for preparation of rubber composition: BR1600 internal mixer, product of FARREL USA.
Physical properties: according to GB/T528-1998: determination of tensile stress strain Properties of vulcanized rubber or thermoplastic rubber vulcanized physical test pieces obtained according to the preparation procedures of examples 1 to 4 described below were subjected to a test.
And (3) testing dynamic mechanical properties of vulcanized rubber, namely rolling resistance and wet skid resistance: the test is carried out by adopting a DMTA Mark V type DYNAMIC viscoelastometer which is a product of Rhometric Scientific company of America, and the test is carried out by adopting a single cantilever beam working mode and a DYNAMIC TEMPERATURE rise mode (DYNAMIC TEMPERATURE RAMP test). The sample is cooled to-50 ℃ by liquid nitrogen, stays for 2min, is heated to 120 ℃ (the heating rate is 2 ℃/min), the measuring frequency is 10HZ, and the strain is 0.2%. Vulcanized sheets obtained according to the preparation processes of examples 1 to 4 described below were sampled to test sample sizes of 15X 8X 2mm 3.
Examples 1 to 4
The preparation process comprises the following steps:
the first stage is as follows: the preparation method is carried out in an internal mixer, the TCU temperature is set to be 60 ℃, firstly, rubber materials (SSBR, BR) and white carbon black with the amount shown in the table 1 are added, the mixture is pressed for 30s at the rotating speed of 50rpm, then, carbon black and small materials (all other additives except the rubber materials, the white carbon black and the sulfur accelerator in the table 1) with the amount shown in the table 1 are added, the mixture is heated to 60 revolutions, pressed for 30s, then, lifted for 5s, pressed for 120 ℃, lifted for 5s, then, the mixture is cooled to 20rpm, kept at the temperature of 140-150 ℃ for 4 minutes through middle lifting plug cooling, then, the mixture is discharged at the temperature of 150 ℃ and 155 ℃, and finally, the master batch is obtained through tabletting on an open mill.
And a second stage: after the first masterbatch chips have cooled to below 100 ℃, sulphur and accelerators are added to the mill according to the mixing method of GB 8656-1998 to obtain the final batch.
And a third stage: and putting the final rubber compound into molds required by different tests, and vulcanizing in a flat vulcanizing machine at the vulcanization temperature of 160 ℃ for 20 minutes to obtain a vulcanized physical test piece.
The physical properties and dynamic mechanical properties of the resulting vulcanized physical test pieces are shown in Table 2.
Table 1: formulations of examples 1-4 (the components in the tables below are used in parts by weight)
| Example 1 | Example 2 | Example 3 | Example 4 | |
| SSBR1 | 100 | 100 | ||
| SSBR2 | 60 | 50 | ||
| SSBR3 | 41.25 | 48 | ||
| Butadiene rubber BR | 10 | 15 | ||
| White carbon black Z1165MP | 50 | 70 | 70 | 80 |
| Carbon Black N234 | 9 | 5 | 5 | 5 |
| Liquid Si69 | 4 | 5.6 | 5.6 | 6.4 |
| Dispersant NOP | 3.7 | |||
| Dispersant PEG4000 | 2 | 2 | 3 | |
| Aromatic polymer resin | 6 | 6 | 6 | |
| Environmental protection oil TDAE | 10 | 12 | 20 | |
| ZnO | 2.5 | 2.5 | 2.5 | 2.5 |
| StA | 2 | 2 | 2 | 2 |
| Protective wax 111 | 2 | 2 | 2 | 2 |
| Antioxidant 6PPD | 2 | 2 | 2 | 2 |
| Accelerator DPG | 0.8 | 1.3 | 1.3 | 1.8 |
| Sulfur | 3 | 2.1 | 2.1 | 1.8 |
| Accelerant CZ | 1.8 | 1.7 | 1.7 | 1.7 |
| Total of | 195.1 | 214.2 | 215.15 | 241.2 |
Table 2: examples 1-4 physical and dynamic mechanical Properties of vulcanized physical test pieces
Claims (10)
1. A tread rubber composition for electric vehicle tires, comprising 35 to 55% by weight of a rubber component, and 55 to 100 parts by weight of a filler, 5 to 15 parts by weight of an aromatic hydrocarbon polymer resin, 0.5 to 2.5 parts by weight of a guanidine-based accelerator, 1.5 to 5.5 parts by weight of a dispersant, based on 100 parts by weight of the rubber component, wherein the rubber component comprises solution-polymerized styrene-butadiene rubber, and the filler comprises white carbon black and carbon black, and the dispersant is selected from polyethylene glycol and N-hydroxyphthalimide.
2. A rubber composition according to claim 1, wherein the amount of the rubber component is 40 to 50% by weight, more preferably 42 to 48% by weight.
3. The rubber composition according to claim 1 or 2, wherein the amount of the filler is 55 to 90 parts by weight, preferably 58 to 76 parts by weight, based on 100 parts by weight of the rubber component.
4. A rubber composition according to any one of claims 1 to 3, wherein the amount of the aromatic hydrocarbon polymer resin is from 6 to 10 parts by weight based on 100 parts by weight of the rubber component.
5. A rubber composition according to any one of claims 1 to 4, wherein the rubber component comprises solution polymerized styrene-butadiene rubber and butadiene rubber.
6. A rubber composition according to claim 5, wherein the weight ratio of solution-polymerized styrene-butadiene rubber and butadiene rubber is 95:5 to 70:30, preferably 95:5 to 85: 15.
7. A rubber composition according to any one of claims 1 to 6, wherein the weight ratio of white carbon black to carbon black is from 4.5:1 to 18:1, preferably from 4.8:1 to 17:1, more preferably from 10:1 to 15: 1.
8. The rubber composition according to any one of claims 1 to 7, wherein the amount of the dispersant is 1.8 to 5 parts by weight, preferably 3 to 4.5 parts by weight, based on 100 parts by weight of the rubber component.
9. The rubber composition according to any one of claims 1 to 8, wherein the rubber composition comprises 5 to 40 parts by weight, preferably 8 to 35 parts by weight, more preferably 8 to 15 parts by weight of a process oil, based on 100 parts by weight of the rubber component, preferably the process oil is an environmentally friendly aromatic oil.
10. A tire for electric vehicles, comprising a tread rubber formed from the rubber composition of any of claims 1-9.
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| CN201910663547.2A CN112300458A (en) | 2019-07-23 | 2019-07-23 | Tread rubber composition for electric vehicle tire and tire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910663547.2A CN112300458A (en) | 2019-07-23 | 2019-07-23 | Tread rubber composition for electric vehicle tire and tire |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700158A (en) * | 2015-11-13 | 2017-05-24 | 中国石油化工股份有限公司 | High-strength rubber composition, vulcanized rubber and preparation method and application of vulcanized rubber |
| CN106750668A (en) * | 2016-11-24 | 2017-05-31 | 中策橡胶集团有限公司 | A kind of ultralow rolling resistance and superelevation is wet grabs performance tire tread mix and preparation method thereof and tire |
| CN109942920A (en) * | 2019-03-26 | 2019-06-28 | 腾森橡胶轮胎（威海）有限公司 | A kind of superelevation road holding Tire tread rubber composition |
-
2019
- 2019-07-23 CN CN201910663547.2A patent/CN112300458A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700158A (en) * | 2015-11-13 | 2017-05-24 | 中国石油化工股份有限公司 | High-strength rubber composition, vulcanized rubber and preparation method and application of vulcanized rubber |
| CN106750668A (en) * | 2016-11-24 | 2017-05-31 | 中策橡胶集团有限公司 | A kind of ultralow rolling resistance and superelevation is wet grabs performance tire tread mix and preparation method thereof and tire |
| CN109942920A (en) * | 2019-03-26 | 2019-06-28 | 腾森橡胶轮胎（威海）有限公司 | A kind of superelevation road holding Tire tread rubber composition |
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Application publication date: 20210202 |