KR20120118689A - 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
- Publication number
- KR20120118689A KR20120118689A KR1020110036213A KR20110036213A KR20120118689A KR 20120118689 A KR20120118689 A KR 20120118689A KR 1020110036213 A KR1020110036213 A KR 1020110036213A KR 20110036213 A KR20110036213 A KR 20110036213A KR 20120118689 A KR20120118689 A KR 20120118689A
- Authority
- KR
- South Korea
- Prior art keywords
- rubber
- tire
- rubber composition
- graphene
- tire tread
- Prior art date
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Classifications
-
- 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
-
- 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
-
- 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
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L21/00—Compositions of unspecified rubbers
Abstract
The present invention relates to a rubber composition for a tire tread and a tire manufactured by using the same, and includes graphene having a modified surface.
The rubber tread rubber composition may improve the grip performance by allowing the surface to induce the early grip performance of the tire tread portion at high speed and maintain the late grip performance. In addition, it can significantly increase the time taken for the performance degradation for durability and wear resistance to enable more stable high-speed driving, it can be applied to racing tires and the like to improve the performance.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition for tire treads and a tire made using the same, which can be used in a tread rubber composition of a high performance car tire or a racing tire.
Conventionally, the rubber composition for tire treads increases the filling amount of carbon black or uses styrene butadiene rubber with a high content of styrene in order to further improve the grip performance of the tread portion of the tire. However, when inducing a quick grip performance of the tire, there is a problem that the wear resistance or durability of the tire is sharply lowered.
Specifically, in the case of filling a large amount of carbon black, the weight of the tire increases, and a problem arises in that heat resistance and wear resistance decrease. In particular, when the purpose of high-speed running is to use a finer carbon black, thereby increasing the unit cost of the product, there are many problems in terms of continuous production.
In addition, when the content of the styrene butadiene rubber exceeds a certain level, the grip performance of the tire tread portion is sharply lowered, thereby causing a problem that durability and wear resistance are also reduced.
Accordingly, while reducing the content of the carbon black used as a conventional reinforcement material, the grip performance of the tire tread portion can be improved at high speeds, and has a high tire durability and wear resistance, such as a tire tread rubber composition suitable for high speed running performance Development is required.
On the other hand, thanks to recent advances in nanotechnology, the high sensitivity, high specificity, and high selectivity characteristics of nanomaterials such as nanoparticles, nanowires, and nanodevices can be combined with biotechnology to explore areas that were previously inaccessible as bioanalytical tools. With this trend, research in the field of nanomaterials became more interesting, and among the various nanomaterials, a new material called graphene is more recently compared to other carbon materials (0D fullerene, 1D carbon nanotube, etc.). As it shows excellent electrical, physical and optical characteristics, many researches and commercialization movements using it are actively progressing.
Accordingly, an object of the present invention is to provide a rubber tread rubber composition that can improve the performance and durability of the tire and wear resistance, while inducing the early early grip performance of the tire tread portion during high-speed running, and can maintain the second half grip performance. will be.
The present invention also provides a tire tread manufactured using the rubber composition for tread.
In order to achieve the above object, the present invention provides a rubber composition for tire tread comprising a graphene (graphen) surface is modified.
Specifically, the tire tread rubber composition may include 100 parts by weight of raw rubber raw rubber, and 0.1 to 50.0 parts by weight of the modified graphene surface.
In addition, the tire tread rubber composition may further include 20 to 30 parts by weight of carbon black.
The tire tread rubber composition may include a master batch including graphene, raw material rubber, and carbon black having the surface modified.
On the other hand, the surface-modified graphene may be surface modified with an organic compound containing a carboxyl group (carboxyl).
The organic compound including the carboxyl group may be amino benzoic acid.
The weight ratio of the graphene and the organic compound containing the carboxyl group in the organic compound including the carboxyl group may be 10:90 to 90:10.
A tire may be manufactured using the rubber tread rubber composition.
Through the rubber composition for the tire tread and the tire manufactured using the tire tread, it is possible to solve the conventional problems and maintain the grip performance of the tire.
Hereinafter, the present invention will be described in more detail.
The rubber composition for tire treads according to one embodiment of the present invention may include a raw material rubber.
The raw rubber may be any one selected from the group consisting of natural rubber, synthetic rubber, and combinations thereof.
The natural rubber may be general natural rubber or modified natural rubber.
The general natural rubber may be used as long as it is known as natural rubber, and the origin and the like are not limited. The natural rubber contains cis-1,4-polyisoprene as a main agent, but may also include trans-1,4-polyisoprene depending on the required properties. Therefore, the natural rubber includes, in addition to the natural rubber containing cis-1,4-polyisoprene as a main agent, for example, a natural containing trans-1,4-isoprene as a main agent such as a balata, which is a kind of rubber of South American sapotagua. Rubber may also be included.
The modified natural rubber means a modified or refined general natural rubber. For example, examples of the modified natural rubber include epoxidized natural rubber (ENR), deproteinized natural rubber (DPNR), and hydrogenated natural rubber.
Synthetic rubber is styrene butadiene rubber (SBR), modified styrene butadiene rubber, butadiene rubber (BR), modified butadiene rubber, chloro sulfonated polyethylene rubber, epichlorohydrin rubber, fluorine rubber, silicone rubber, nitrile rubber, hydrogenated Nitrile Rubber, Nitrile Butadiene Rubber (NBR), Modified Nitrile Butadiene Rubber, Chlorinated Polyethylene Rubber, Styrene Ethylene Butylene Styrene (SEBS) Rubber, Ethylene Propylene Rubber, Ethylene Propylene Diene (EPDM) Rubber, Hypalon Rubber, Chloroprene Rubber, Ethylene vinyl acetate rubber, acrylic rubber, hydrin rubber, vinyl benzyl chloride styrene butadiene rubber, bromo methyl styrene butyl rubber, maleic acid styrene butadiene rubber, carboxylic acid styrene butadiene rubber, epoxy isoprene rubber, maleic acid ethylene propylene rubber, carboxylic acid Nitrile Butadiene High It may be a p-methyl styrene (brominated polyisobutyl isoprene-co-paramethyl styrene, BIMS), and one selected from the group consisting of -, bromo mineyi suited polyisobutyl isoprene-co.
In particular, the raw material rubber is polyisoprene rubber, polybutadiene rubber, conjugated diene aromatic vinyl copolymer, nitrile conjugated diene copolymer, hydrogenated nitrile butadiene rubber (NBR), hydrogenated styrene butadiene rubber (SBR), olefin rubber, maleic acid It may be any one selected from the group consisting of modified ethylene-propylene rubber, butyl rubber, copolymer of isobutylene and aromatic vinyl or diene monomer, acrylic rubber, ionomer, halogenated rubber and chloroprene rubber.
The rubber composition for tire treads according to one embodiment of the present invention may optionally further include various additives such as additional vulcanizing agents, vulcanization accelerators, fillers, coupling agents, anti-aging agents, softeners or pressure-sensitive adhesives.
The various additives can be used as long as it is commonly used in the field of the present invention, the content thereof is not particularly limited, depending on the compounding ratio used in the conventional tire tread rubber composition.
In addition, the rubber composition for a tire tread according to an embodiment of the present invention may further include 20 to 30 parts by weight of carbon black.
Carbon black is conventionally used as a reinforcing material for tires, but there is a problem in that when the filling amount of carbon black in the tire tread composition is increased in order to improve the grip performance of the tire, the weight of the tire increases, and heat resistance and wear resistance decrease.
Therefore, the present invention solves the above problems while reducing the content of carbon black by including the surface-modified graphene. According to the present invention, as the surface includes the modified graphene, even if the carbon black is included in a small amount of 20 to 30 parts by weight, the reinforcing performance as in the prior art can be obtained.
The rubber composition for tire treads according to an embodiment of the present invention may include graphene or graphene with a modified surface.
The graphene is a two-dimensional carbon structure having a thickness of one atom, and has a thin two-dimensional thin film structure of atomic level obtained basically from carbon. Graphene is a very good conductor, it is very structurally and chemically stable, and its self-assembly allows for not only one-dimensional and two-dimensional but also three-dimensional nanopatterning. It is characterized by chemical functionalization such as adsorption of aromatic molecules and biomaterials.
As a method for synthesizing graphene, generally, physical exfoliation method using scotch-tape, graphite oxide ultrasonic fracturing method, chemical vapor deposition method, epitaxy synthesis method, organic compound using tetraphenyl benzene Synthesis method etc. can be used.
On the other hand, in order to increase the resistance strength through graphene (graphen) it can be surface modification for the graphene. As one example of various methods to pass through the surface functional group of the reduced graphene oxide. As a specific example, functional groups such as -CH 3 and -SO 3 groups may be covalently attached to the graphene surface via oxygen functional (-O-, -COOH). The modified graphene can obtain high strength and exhibit excellent resistance to fatigue cracking when used repeatedly for long periods of time.
Therefore, the rubber composition for a tire tread according to an embodiment of the present invention may include a graphene whose surface is modified, and the surface-modified graphene is an organic compound containing a carboxyl group and shared on the graphene surface. In combination it can be provided as a modified surface. Preferably, in the surface-modified graphene, the organic compound including a carboxyl group for surface modification may use aminobenzoic acid.
The surface modification to the graphene is preferably an organic compound containing a carboxyl group as a functional group in consideration of affinity with rubber, more preferably by using amino benzoic acid to further improve the affinity with rubber. have. The weight ratio of the graphene and the organic compound including a carboxyl group (carboxyl) in the surface-modified graphene may be used to be 10:90 to 90:10, but is not limited thereto.
If the content of the organic compound containing the carboxyl group (carboxyl) is less than 10, the dispersibility of the rubber is lowered, and if it exceeds 90, the initial grip performance cannot be induced.
The surface-modified graphene may be included in an amount of 0.1 to 50.0 parts by weight, and more preferably 0.5 to 10.0 parts by weight, based on 100 parts by weight of the raw material rubber. If it is less than 0.1, it is difficult to show sufficient effects for improving the initial grip performance and maintaining the second grip performance, and if it exceeds 50.0, it is difficult to obtain necessary properties.
The rubber composition for tire treads according to an embodiment of the present invention may be included by masterbatching the graphene whose surface is modified.
That is, in using the surface-modified graphene, a masterbatch prepared by mixing the surface-modified graphene with synthetic rubber, carbon black, and oil in order to improve dispersibility in a rubber matrix may be used. In the compounding process, the surface-modified graphene may be introduced into a masterbatch form to improve dispersibility. Due to this high dispersibility, heat may be rapidly and evenly progressed in the first half of the tread at high speed. Therefore, the rubber composition for the tread including the masterbatch can be used for various purposes because it has the advantage of preventing the deterioration of physical properties of a specific part of the tire as well as the high physical properties of the tire.
Tire according to another embodiment of the present invention is manufactured using the rubber composition for the tire tread.
The rubber composition for tire treads according to the present invention may induce the early grip performance of the tire tread portion at high speed and maintain the late grip performance to improve the grip performance. In addition, it can significantly increase the time taken for the performance degradation for durability and wear resistance to enable more stable high-speed driving, it can be applied to racing tires and the like to improve the performance.
Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice 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.
[Production Example: Production of Rubber Composition]
A rubber composition for tire treads according to the following examples and comparative examples was prepared using the composition shown in Table 1 below. The rubber composition was prepared according to a conventional method for preparing a rubber composition.
(Unit: parts by weight)
(1) Raw material rubber: Styrene-butadiene rubber (including 25.5 parts by weight of oil).
(2) Graphene: Graphene whose surface is modified with aminobenzoic acid.
Experimental Example: Measurement of Physical Properties of Prepared Rubber
The physical properties of the rubber specimens prepared in Examples and Comparative Examples were measured, and the results are shown in Table 2 below.
In the following Table 2, the grip performance using the rubber composition, the tire size 280 / 640R18 F200 using the tread portion was used, the air pressure is 200kPa, the test driver runs the circuit course (2km) 10 times in dry conditions The lap time for each run was then measured to evaluate the initial grip performance and the sustainability of the grip performance.
A grip performance score of 1 indicates that the grip performance is not very good, and 10 indicates that the grip performance is very good.
300% Modulus (Modulus) is the tensile strength at 300% elongation, measured according to the ISO 37 standard, the higher the value shows excellent strength.
Elongation was measured by the method of expressing the strain value (%) until the test piece was cut in the tensile tester.
The index of wear is the ratio of Lambbourn abrasion tester, which shows the loss of rubber worn by rotating at a sliding ratio of 25% and a load of 1.5kg at room temperature as the comparative example 100. The higher the value, the better the wear performance. Indicates.
* Abrasion degree = (wear amount of comparative example / wear amount of example) × 100
Referring to Table 2, it was confirmed that the rubber composition for tire treads including the modified graphene surface shows a superior effect on the initial grip performance as well as grip persistence, compared to the comparative example without using the same.
In the case of using the graphene with a modified surface compared to the comparative example it was confirmed that the wear resistance is increased to show an excellent wear resistance effect.
In addition, it was confirmed that Examples 2 to 4, in which the surface-modified graphene is contained in an amount of 0.5 to 10.0 parts by weight based on 100 parts by weight of the raw material rubber, also show excellent effects.
Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.
Claims (8)
100 parts by weight of raw rubber, and
0.1 to 50.0 parts by weight of the surface-modified graphene
Rubber composition for a tire tread comprising a.
The tire tread rubber composition further comprises 20 to 30 parts by weight of carbon black.
The tire tread rubber composition comprises a master batch (master batch) comprising the surface-modified graphene, raw rubber and carbon black.
The surface-modified graphene is a rubber composition for a tire tread surface is modified with an organic compound containing a carboxyl group (carboxyl).
The organic compound containing the carboxyl group (carboxyl) is a tire tread rubber composition is amino benzoic acid (aminobenzoic acid).
The weight ratio of the organic compound containing the graphene and the carboxyl group in the organic compound containing a carboxyl group (carboxyl) is 10:90 to 90:10 rubber composition for tire tread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110036213A KR20120118689A (en) | 2011-04-19 | 2011-04-19 | Rubber composition for tire tread and tire manufactured by using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110036213A KR20120118689A (en) | 2011-04-19 | 2011-04-19 | Rubber composition for tire tread and tire manufactured by using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20120118689A true KR20120118689A (en) | 2012-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020110036213A KR20120118689A (en) | 2011-04-19 | 2011-04-19 | Rubber composition for tire tread and tire manufactured by using the same |
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| Country | Link |
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| KR (1) | KR20120118689A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385310A (en) * | 2016-01-04 | 2016-03-09 | 沈阳顺风实业集团有限公司 | Steel structure fireproof anticorrosion function integrated coating and preparing method thereof |
| CN107090107A (en) * | 2017-06-12 | 2017-08-25 | 泉州信和石墨烯研究院有限公司 | Abrasive rubber that a kind of graphene is modified and preparation method thereof |
| CN110294873A (en) * | 2019-05-24 | 2019-10-01 | 南京海旗新材料科技有限公司 | A kind of Composite material of tire tread containing graphene |
| KR20200137407A (en) * | 2019-05-30 | 2020-12-09 | 피씨케이(주) | High performance rubber adhesive composition using modified graphene |
-
2011
- 2011-04-19 KR KR1020110036213A patent/KR20120118689A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385310A (en) * | 2016-01-04 | 2016-03-09 | 沈阳顺风实业集团有限公司 | Steel structure fireproof anticorrosion function integrated coating and preparing method thereof |
| CN107090107A (en) * | 2017-06-12 | 2017-08-25 | 泉州信和石墨烯研究院有限公司 | Abrasive rubber that a kind of graphene is modified and preparation method thereof |
| CN110294873A (en) * | 2019-05-24 | 2019-10-01 | 南京海旗新材料科技有限公司 | A kind of Composite material of tire tread containing graphene |
| KR20200137407A (en) * | 2019-05-30 | 2020-12-09 | 피씨케이(주) | High performance rubber adhesive composition using modified graphene |
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