KR101709215B1 - Rubber composition for tire tread and tire manufactured by using the same - Google Patents
Rubber composition for tire tread and tire manufactured by using the same Download PDFInfo
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- KR101709215B1 KR101709215B1 KR1020150077858A KR20150077858A KR101709215B1 KR 101709215 B1 KR101709215 B1 KR 101709215B1 KR 1020150077858 A KR1020150077858 A KR 1020150077858A KR 20150077858 A KR20150077858 A KR 20150077858A KR 101709215 B1 KR101709215 B1 KR 101709215B1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0016—Compositions of the tread
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2380/00—Tyres
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
Abstract
In the present invention, 10 to 55 parts by weight of carbon black and 3 to 20 parts by weight of a processed oil are contained, based on 100 parts by weight of the raw rubber, and the raw rubber is composed of 30 to 75 parts by weight of natural rubber, 20 to 50 parts by weight of a butadiene rubber and 15 to 30 parts by weight of a solution-polymerized styrene butadiene rubber, wherein the rubber composition for a tire tread has a suitable hardness characteristic favorable to the performance of snow tires and at the same time balances handling, And a tire produced using the same.
Description
The present invention relates to a rubber composition for a tire tread having a suitable hardness characteristic favorable to the performance of snow tires and at the same time balancing handling, abrasion and fuel consumption performance, and a tire made using the rubber composition.
Improving snow performance for truck-bus tires has become an essential element, as the labeling system for tire performance, as well as the minimum requirement for snow indexes in the European Union and Japan, have also been applied to truck-bus tires. In addition, there is a need to maintain and improve the optimum hardness characteristics, low fuel consumption, and abrasion performance while improving the snow performance.
In addition, the handling performance of truck-bus snow tires is essential because truck-busses run under relatively high loads on ice or snowmobiles.
In order to improve the snow performance, the hardness of the rubber composition should be smooth. The smoother the rubber composition, the higher the ground surface area and the greater the same force distributed on the ice sheet or the snowy road, and the lower the pressure per unit area, the better the snow performance.
In the prior art, a synthetic rubber and a silica filler were mixedly used in order to improve the performance of snow tires. In this case, there is a disadvantage in that the endurance performance and wear performance of the tire are lowered.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a rubber composition for a tire tread having a balance of handling, abrasion and fuel consumption performance while having suitable hardness characteristics favorable to the performance of snow tires.
Another object of the present invention is to provide a tire produced by using the rubber composition for a tire tread.
In order to achieve the above object, the rubber composition for tire tread according to one embodiment of the present invention comprises 10 to 55 parts by weight of high structure carbon black and 3 to 20 parts by weight of processed oil, Wherein the raw material rubber comprises 30 to 75 parts by weight of natural rubber, 20 to 50 parts by weight of neodymium butadiene rubber and 15 to 30 parts by weight of solution-polymerized styrene butadiene rubber based on the total weight of the raw rubber. to provide.
The neodymium butadiene rubber may have a glass transition temperature (Tg) of -110 to -103 degrees, a pattern viscosity of 37 to 49, and a molecular weight distribution of 1.9 to 3.6.
The solution-polymerized styrene-butadiene rubber may have a styrene content of 10 to 15% by weight, a vinyl content of 26 to 35% by weight, and a glass transition temperature of -75 to -60 캜.
The high-structure carbon black may have an iodine adsorption value of 107 to 123 mg / g, an oil adsorption specific surface area of 125 to 143 cc / 100 g, and a Tint value of 113 to 120.
The processed oil may have a kinematic viscosity of 77 to 121 (SUS @ 210 DEG F).
The rubber composition for a tire tread further comprises 0.5 to 2 parts by weight of a sulfur vulcanizing agent, 0.5 to 5 parts by weight of a vulcanization accelerator, 1 to 5 parts by weight of zinc oxide, and 0.5 to 3 parts by weight of stearic acid, based on 100 parts by weight of the raw rubber can do.
The processed oil may be any one selected from the group consisting of treated distillate aromatic extract (TDAE) oil, mild extraction solvate (MES) oil, residual aromatic extract (RAE) oil and heavy naphthenic oil.
The present invention also provides a snow tire manufactured using the rubber composition for a tire tread according to an embodiment of the present invention.
The rubber composition for a tire tread according to the present invention and the tire made therefrom have good hardness characteristics favorable to the performance of snow tires and at the same time balance the handling, abrasion and fuel consumption performance to meet the performance of snow tires.
The present invention optimizes the constitutional and physical properties and content of raw rubber, carbon crack, processing oil and additives in the production of a tire tread rubber composition so as to be suitable for snow tires for truck-bus, Wear performance, fuel economy performance, and handling performance in a balanced manner.
That is, the rubber composition for a tire tread according to an embodiment of the present invention comprises 10 to 55 parts by weight of a high-structure carbon black and 3 to 20 parts by weight of a processed oil, based on 100 parts by weight of the raw rubber, Wherein the rubber composition comprises 30 to 75 parts by weight of natural rubber, 20 to 50 parts by weight of neodymium butadiene rubber and 15 to 30 parts by weight of solution-polymerized styrene butadiene rubber based on the total weight of the rubber.
Each component will be described in detail below.
1) Raw material rubber
The raw material rubber includes 30 to 75 parts by weight of natural rubber, 20 to 50 parts by weight of neodymium butadiene rubber and 15 to 30 parts by weight of solution-polymerized styrene butadiene rubber based on the total weight of the raw rubber.
The natural rubber is advantageous in durability and abrasion resistance.
A certain amount of neodymium butadiene rubber having a glass transition temperature (Tg) favorable to snow performance and abrasion performance can be added. The neodymium butadiene rubber may be a butadiene rubber prepared by a neodymium catalyst. The neodymium butadiene rubber has a glass transition temperature (Tg) of -110 to -103 DEG C, a pattern viscosity of 37 to 49, a molecular weight The distribution can be 1.9 to 3.6.
If the glass transition temperature of the neodymium-butadiene rubber is less than -110 ° C, the wet grip on the wet road surface may be deteriorated. If the glass transition temperature is higher than -103 ° C, .
If the neodymium-butadiene rubber has a Mooney viscosity of less than 37, a problem of cold flow performance deterioration may occur. If the neodymium-butadiene rubber has a Mooney viscosity of more than 49, there may be a problem of deterioration of processability.
If the molecular weight distribution of the neodymium-butadiene rubber is less than 1.9, there may be a problem of deterioration of workability. If the molecular weight distribution of the neodymium-butadiene rubber is more than 3.6, elasticity of the rubber may be deteriorated.
A solution-polymerized styrene-butadiene rubber having a low glass transition temperature may be mixed to minimize the handling performance deterioration caused by the addition of the neodymium butadiene rubber.
The solution-polymerized styrene-butadiene rubber may have a styrene content of 10 to 15% by weight, a vinyl content of 26 to 35% by weight, and a glass transition temperature of -75 to -60 캜.
If the styrene content of the styrene-butadiene rubber is less than 10% by weight, wet grip on the wet road surface may be deteriorated. If the styrene content is more than 15% by weight, heat resistance and abrasion performance may be disadvantageous .
If the vinyl content of the styrene-butadiene rubber is less than 26% by weight, heat resistance may be deteriorated. If the vinyl content exceeds 35% by weight, handling performance may be deteriorated.
If the glass transition temperature of the styrene-butadiene rubber is less than -75 캜, the wet grip on the wet road surface may be deteriorated, and if it exceeds -60 캜, the snow performance may be deteriorated.
2) Reinforcement Filler
The rubber composition for a tire tread contains 10 to 55 parts by weight of a high structure carbon black as a reinforcing filler with respect to 100 parts by weight of the raw rubber.
The reinforcing filler can minimize the trade-off of the abrasion performance and can use the high structure carbon black alone for the snow performance.
The high-structure carbon black may have an iodine adsorption value of 107 to 123 mg / g, an oil adsorption specific surface area of 125 to 143 cc / 100 g, and a Tint value of 113 to 120.
In order to improve not only the wet road surface and icy snow surface braking ability but also the anti-abrasion performance and handling performance, Full Silica is replaced with carbon black, and styrene butadiene rubber (Low Tg S-SBR) Respectively.
3) Processing oil
It is possible to add processing oil which is advantageous for snow performance and low fuel consumption performance, hardness and mixing processability.
The processed oil is used for imparting plasticity to rubber to facilitate processing and to reduce the hardness of vulcanized rubber. Specifically, petroleum-based oil, plant oil, and combinations thereof can be used. However, the present invention is not limited thereto.
The petroleum-based oil may be selected from the group consisting of paraffinic oil, naphthenic oil, aromatic oil, and combinations thereof.
Examples of the paraffin oil include P-1, P-2, P-3, P-4, P-5 and P-6 of Mychang Oil Co., N-1, N-2 and N-3 of Kokai Co., Ltd., and representative examples of the aromatic oils include A-2 and A-3 of Mingchang Oil Co.,
However, recently, when the content of the polycyclic aromatic hydrocarbons (hereinafter referred to as "PAHs ") contained in the aromatic oil is 3 wt% or more together with the increase in environmental consciousness, Treated distillate aromatic extract (TDAE) oil, mild extraction solvate (MES) oil, residual aromatic extract (RAE) oil or heavy naphthenic oil.
Particularly, the processed oil preferably has a total content of PAHs components of 3% by weight or less, a kinetic viscosity of 77 to 121 (SUS @ 210 ° F), an aromatic component of 15 to 25% And 27 to 37% by weight of the paraffinic component and 38 to 58% by weight of the paraffinic component may be more preferable. The PAH may be selected from the group consisting of benzo (a) pyrene, BaP, benzo (e) pyren, BeP, benzo (a) anthracene, BaA Benzo (b) fluoranthene, BbFA), benzo (j) fluoranthene, BjFA), benzo (k) (A) pyrene (benzo (k) fluoranthene, BkFA), dibenzo (a, h) anthracene PAH (Polycyclic Aromatic Hydrocarbon) Benzo (a) pyrene, BaP), benzo (e) pyrene, BeP), benzo (a) anthracene, BaA, Benzo (b) fluoranthene, BbFA), benzo (j) fluoranthene, BjFA, benzo (k) k) fluoranthene, BkFA), and dibenzo (a, h) anthracene may be 10 ppm or less.
The TDAE oil has an advantageous property against environmental factors such as the possibility of causing cancer of PAHs while improving the low-temperature characteristics and the fuel consumption performance of the tire tread rubber composition.
Examples of the vegetable oil include vegetable oils such as castor oil, cottonseed oil, linseed oil, canola oil, soybean oil, palm oil, palm oil, peanut oil, pine oil, pine tar, tall oil, konyu, rice bran oil, safflower oil, sesame oil, , Camellia oil, jojoba oil, macadamia nut oil, safflower oil, or tung oil. One of these may be used alone, or a mixture of two or more thereof may be used.
At this time, it is preferable to apply a predetermined amount of the processing oil.
It is more preferable to apply 3 to 20 parts by weight of the processing oil to 100 parts by weight of the raw material rubber.
When the above-mentioned working oil is used in an amount exceeding 20 parts by weight, it is difficult to satisfy the durability and abrasion resistance required for a truck-bus tire.
4) Other additives
In addition to the above-mentioned components, the rubber composition for a tire tread according to the present invention may optionally contain additives used for improving the physical properties of a rubber composition for a tire tread such as a vulcanizing agent, a vulcanization accelerator, Or a mixture of two or more thereof.
Specifically, a sulfur vulcanizing agent may be used as the vulcanizing agent.
The sulfur vulcanizing agent is an inorganic vulcanizing agent such as powder sulfur (S), insoluble sulfur (S), precipitated sulfur (S), colloid sulfur, etc., tetramethylthiuram disulfide (TMTD) An organic vulcanizing agent such as tetraethyltriuram disulfide (TETD), dithiodimorpholine and the like, and a vulcanizing agent which produces other elemental sulfur or sulfur such as amine disulfide, polymer sulfur and the like .
It is preferable that the vulcanizing agent is included in an amount of 0.5 to 2 parts by weight based on 100 parts by weight of the raw material rubber, because it is a vulcanizing effect which is less sensitive to heat and chemically stable.
On the other hand, the vulcanization accelerator is an accelerator for accelerating the vulcanization rate or promoting the retardation effect in the initial vulcanization stage. Specifically, the vulcanization accelerator is a sulfenamide, thiazole, thiuram, thiourea, guanidine, Aldehyde-amine-based, aldehyde-ammonia-based, imidazoline-based, or xanthate-based compounds.
Examples of the sulfenamide type vulcanization accelerator include N-cyclohexyl-2-benzothiazyl sulfenamide (CBS), N-tert-butyl-2-benzothiazyl sulfenamide (TBBS), N, N-dicyclohexyl Benzothiazyl sulfenamide, N-oxydiethylene-2-benzothiazyl sulfenamide, N, N-diisopropyl-2-benzothiazole sulfenamide, and the like. Mixtures of two or more may be used.
Examples of the thiol-based vulcanization accelerator include 2-mercaptobenzothiazole (MBT), dibenzothiazyl disulfide (MBTS), sodium salt of 2-mercaptobenzothiazole, zinc salt of 2-mercaptobenzothiazole , A copper salt of 2-mercaptobenzothiazole, a cyclohexylamine salt of 2-mercaptobenzothiazole, 2- (2,4-dinitrophenyl) mercaptobenzothiazole, 2- Ethyl 4-morpholinothio) benzothiazole, and the like, alone or in a mixture of two or more of them may be used.
Examples of the thiuram-based vulcanization accelerator include tetramethylthiuram disulfide (TMTD), tetraethylthiuram disulfide, tetramethylthiuram monosulfide, dipentamethylthiuram disulfide, dipentamethylthiuram monosulfide, dipentamethylene Thiuram tetrasulfide, dipentamethylenethiuram hexasulfide, tetrabutylthiuram disulfide, and pentamethylenethiuram tetrasulfide. These may be used singly or in a mixture of two or more of them.
Examples of thiourea vulcanization accelerators include thiocarbamide, diethyl thiourea, dibutyl thiourea, trimethyl thiourea, diorthotolyl thiourea, etc., and one kind or a mixture of two or more thereof Can be used.
Examples of the guanidine vulcanization accelerator include diphenylguanidine, diorthotolylguanidine, triphenylguanidine, orthotolylbiguanide, diphenylguanidine phthalate, etc., and one kind or a mixture of two or more of them may be used .
Examples of the dithiocarbamate-based vulcanization accelerator include zinc ethylphenyldithiocarbamate, zinc butylphenyldithiocarbamate, sodium dimethyldithiocarbamate, zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, Zinc dibutyldithiocarbamate, zinc diamidithiocarbamate, zinc dipropyldithiocarbamate, complexation of zinc with piperidinedithiocarbamate and piperidine, zinc hexadecylisopropyldithiocarbamate, octadecyl Isopropyl dithiocarbamic acid zinc zinc dibenzyldithiocarbamate, sodium diethyldithiocarbamate, penta methylenedithiocarbamate, sodium selenium dimethyldithiocarbamate, diethyldithiocarbamate, sodium diethyldithiocarbamate, Cadmium dithiocarbamate, etc. These may be used singly or in combination of two or more kinds.
Examples of the aldehyde-amine type or aldehyde-ammonia type vulcanization accelerator include aldehyde-amine type or aldehyde-ammonia type reactants such as acetaldehyde-aniline reactant, butylaldehyde-aniline condensate, hexamethylenetetramine or acetaldehyde- Based compound can be used.
Examples of the imidazoline vulcanization accelerator include 2-mercaptoimidazoline. Examples of the xanthate vulcanization accelerator include zinc dibutylxanthogenate and the like. Of these, They may be used singly or in a mixture of two or more.
In consideration of the remarkable improvement effect of the use of the vulcanization accelerator, the use of an amine, a disulfide, a guanidine, a thio element, a thiazole, a thiuram, sulfone amide, or mixtures thereof may be more preferred.
It is preferable that the vulcanization accelerator is included in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the raw rubber in order to maximize productivity improvement and rubber property enhancement through vulcanization speed promotion.
In addition to the above-mentioned additives, the rubber composition for a tire tread according to the present invention may be used in combination with the vulcanization accelerator in order to complete the promoting effect thereof, any one selected from the group consisting of inorganic vulcanization accelerators, organic vulcanization accelerators, And a vulcanization accelerator auxiliary of the vulcanization accelerator.
Examples of the inorganic vulcanization accelerator include zinc oxide (ZnO), zinc carbonate, magnesium oxide (MgO), lead oxide, potassium hydroxide, etc. One or more of these may be used alone or in combination. Mixtures may be used. Examples of the organic-based vulcanization accelerator include stearic acid, zinc stearate, palmitic acid, linoleic acid, oleic acid, lauric acid, dibutyl ammonium oleate, and derivatives thereof. Of these, The species alone or a mixture of two or more species may be used.
Among the above-mentioned vulcanization accelerators, a mixture of zinc oxide and stearic acid may be used. In this case, the zinc oxide is dissolved in the stearic acid to form an effective complex with the vulcanization accelerator to produce favorable sulfur during the vulcanization reaction, Lt; / RTI >
When zinc oxide and stearic acid are used together, they may be used in an amount of 1 to 5 parts by weight and 0.5 to 3 parts by weight, respectively, based on 100 parts by weight of the raw rubber.
The present invention also provides a snow tire manufactured using the rubber composition for a tire tread according to an embodiment of the present invention.
The rubber composition for a tire tread having the above composition can be produced by mixing the above-mentioned components according to a conventional method. During the finishing step in which the first step of thermo-mechanical treatment or kneading and the crosslinking system are mixed, specifically at a maximum temperature of 110 to 190 占 폚, preferably at a high temperature of 130 to 180 占 폚, typically less than 110 占 폚, And a second step of mechanical treatment at a low temperature of 40 to 100 DEG C, but the present invention is not limited thereto.
The rubber composition for a tire tread manufactured by the above method is not limited to treads (tread cap and tread base), and may be included in various rubber components constituting the tire. Said rubber components include sidewalls, sidewall inserts, apex, chafer, wire coat or inner liner.
According to another embodiment of the present invention, there is provided a tire manufactured using the rubber composition for a tire tread.
The method of manufacturing the tire may be any method used for manufacturing a tire except for the use of the rubber composition for tire tread, and a detailed description thereof will be omitted herein. However, the tire may include a tire tread made using the rubber composition for a tire tread.
The tires may be automobile tires, racing tires, airplane tires, agricultural tires, off-the-road tires, truck tires or bus tires. The tire may be a radial tire or a bias tire, preferably a radial tire, and more preferably a snow tire for a truck-bus.
Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
[ Manufacturing example : tire For tread Preparation of rubber composition]
Were mixed in the compositions and contents as shown in Table 1 below, and were mixed in a Banbury mixer to prepare rubber compositions for tire treads according to Examples and Comparative Examples.
(weight%)
In Table 1, the content of the constituent components of the raw rubber is in parts by weight with respect to the total weight of the raw rubber, and the content of the other components is in parts by weight based on 100 parts by weight of the raw rubber.
1) Neodymium butadiene rubber: Butadiene rubber produced by neodymium catalyst. A glass transition temperature of -160 캜, a Mooney viscosity of 42, a molecular weight distribution of 2.32, an average molecular weight of 7.0 x 10 5 g / mol
2) solution polymerization styrene butadiene rubber: styrene butadiene rubber prepared by solution polymerization. Styrene content of 10% by weight, vinyl content of butadiene of 35% by weight, glass transition temperature of -64 占 폚
3) High structure carbon black: iodine adsorption of 115 mg / g, oil adsorption specific surface area of 135 cc / 100 g, Tint value of 120
4) low structure carbon black: iodine adsorption value of 142 mg / g, oil adsorption specific surface area of 102 cc / 100 g, Tint value of 127
5) Oil: TDAE oil, kinetic viscosity 99 (SUS @ 210 ° F)
[ Test Example : Property evaluation]
Rubber specimens were prepared using the rubber composition for tire tread prepared in the above Examples and Comparative Examples, and various physical properties of the rubber specimens were measured and evaluated in the following manner. The results are shown in Table 2 below.
1) Mixing processability (Mooney viscosity): The value of Example 1 was taken as 100 and represented by Index value. The Mooney viscosity is an indicator of processability.
2) Hardness (Shore A): Measured according to DIN 53505. The hardness indicates the adjustment stability. The lower the value, the better the snow performance. At hardness levels below 60, snow handling and wear performance are disadvantageous.
3) Snow performance (ECE R117: Acceleration test), Snow handling performance, Durability performance, LRR performance (ISO 28580), Wear resistance performance: The index is an Index expressed in 100%
As can be seen from the results of Table 2, it was confirmed that the performance index of Comparative Example 1 to 6 was improved in Example 1 as a whole. In Comparative Example 1, in which the content of the carbon black was not less than the proper amount, the snow performance and the LRR performance index were disadvantageous as compared with Example 1. In Comparative Example 2, except for the oil favoring the snow performance, the snow performance and the overall performance index were disadvantageous. In the case of Comparative Example 3 in which the oil was excessively applied, the abrasion performance was remarkably disadvantageous and the overall performance index was disadvantageous. As in Comparative Example 4, when the solution-polymerized styrene butadiene rubber was excluded, the snow handling index tended to be very low, and the endurance performance and the abrasion resistance were generally disadvantageous. As in Comparative Example 5, when the particle size was relatively small and the low structure carbon black was applied, the performances except for abrasion resistance were all disadvantageous. In Comparative Example 6 in which a silica coupling agent was used instead of carbon black as a filler, performance excluding LRR performance and durability was disadvantageous. Particularly, abrasion resistance performance was very disadvantageous.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.
Claims (8)
10 to 55 parts by weight of a high-structure carbon black having an iodine adsorption value of 107 to 123 mg / g, an oil adsorption specific surface area of 125 to 143 cc / 100 g and a Tint value of 113 to 120,
3 to 20 parts by weight of a process oil,
The raw material rubber has a total weight of the raw rubber
30 to 75 parts by weight of natural rubber,
20 to 50 parts by weight of neodymium butadiene rubber and
15 to 30 parts by weight of a solution-polymerized styrene-butadiene rubber having a styrene content of 10 to 15% by weight, a butadiene-containing vinyl content of 26 to 35% by weight and a glass transition temperature of -75 to -60
And a rubber composition for a snow tire tread.
The neodymium butadiene rubber
A glass transition temperature (Tg) of -110 to -103 ° C,
A Mooney viscosity of 37 to 49,
And a molecular weight distribution of 1.9 to 3.6.
Wherein the process oil has a kinematic viscosity of 77 to 121 (SUS @ 210 DEG F).
The rubber composition for a snow tire tread comprises 0.5 to 2 parts by weight of a sulfur vulcanizing agent, 0.5 to 5 parts by weight of a vulcanization accelerator, 1 to 5 parts by weight of zinc oxide, and 0.5 to 3 parts by weight of stearic acid, ≪ / RTI > further comprising a rubber composition.
Wherein the processed oil is any one selected from the group consisting of treated distillate aromatic extract (TDAE) oil, mild extraction solvate (MES) oil, residual aromatic extract (RAE) oil and heavy naphthenic oil .
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| KR1020150077858A KR101709215B1 (en) | 2015-06-02 | 2015-06-02 | Rubber composition for tire tread and tire manufactured by using the same |
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| KR1020150077858A KR101709215B1 (en) | 2015-06-02 | 2015-06-02 | Rubber composition for tire tread and tire manufactured by using the same |
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| KR101709215B1 true KR101709215B1 (en) | 2017-02-22 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102634086A (en) | 2012-05-02 | 2012-08-15 | 三角轮胎股份有限公司 | Tread rubber composition for semisteel meridian snow tire used in extremely cold area |
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| KR20040020529A (en) * | 2002-08-30 | 2004-03-09 | 금호타이어 주식회사 | A rubber composition for snow-tire tread |
| KR101153384B1 (en) | 2009-12-22 | 2012-06-05 | 한국타이어 주식회사 | Rubber composition for tire tread and tire manufactured by using the same |
| KR101315110B1 (en) * | 2010-11-30 | 2013-10-07 | 한국타이어 주식회사 | Tread rubber composition and tire manufactured by using the same |
| KR101376986B1 (en) * | 2011-11-28 | 2014-03-25 | 한국타이어 주식회사 | Rubber composition for tire tread and tire manufactured by using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634086A (en) | 2012-05-02 | 2012-08-15 | 三角轮胎股份有限公司 | Tread rubber composition for semisteel meridian snow tire used in extremely cold area |
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