KR100569869B1 - Tread Rubber Compound with The Properties of High Wet Grip and Low Rolling Resistance - Google Patents

Tread Rubber Compound with The Properties of High Wet Grip and Low Rolling Resistance Download PDF

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KR100569869B1
KR100569869B1 KR1020030084125A KR20030084125A KR100569869B1 KR 100569869 B1 KR100569869 B1 KR 100569869B1 KR 1020030084125 A KR1020030084125 A KR 1020030084125A KR 20030084125 A KR20030084125 A KR 20030084125A KR 100569869 B1 KR100569869 B1 KR 100569869B1
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rubber
tread rubber
rubber composition
present
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KR20050050399A (en
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장동호
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금호타이어 주식회사
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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
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
    • 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
    • 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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  • 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)
  • Tires In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

본 발명은 타이어용 트레드 고무조성물로서, 원료고무 중에 스티렌 함량이 28∼35％, 비닐 함량이 50∼65％인 용액중합 SBR이 함유됨을 특징으로 하는 타이어 트레드 고무조성물을 제공한다. 본 발명에 의한 고무조성물은 타이어의 마모성능과 젖은노면마찰(Wet grip) 특성이 우수하고, 낮은 회전저항을 유지하며, 또한, 필러로서 실리카를 적용하는 경우 상용성을 증가시켜 필러의 분산도를 높임으로써 내마모 및 인열강도를 더욱 개선한 트레드 고무조성물을 제공한다.The present invention provides a tire tread rubber composition comprising a solution-polymerized SBR having a styrene content of 28 to 35% and a vinyl content of 50 to 65% as a tread rubber composition for tires. The rubber composition according to the present invention has excellent wear performance and wet grip characteristics of the tire, maintains low rolling resistance, and increases the compatibility when filler is applied to silica to improve filler dispersion. Increasing provides a tread rubber composition which further improves wear resistance and tear strength.

Description

젖은노면마찰 특성 및 회전저항특성이 우수한 트레드 고무조성물{Tread Rubber Compound with The Properties of High Wet Grip and Low Rolling Resistance} Tread Rubber Compound with The Properties of High Wet Grip and Low Rolling Resistance}

본 발명은 타이어용 트레드 고무조성물에 관한 것으로, 보다 상세하게는 타이어의 마모성능과 젖은노면마찰(Wet grip) 특성이 우수하고, 낮은 회전저항을 유지하며, 또한, 필러로서 실리카를 적용하는 경우 상용성을 증가시켜 필러의 분산도를 높임으로써 내마모 및 인열강도를 더욱 개선한 트레드 고무조성물에 관한 것이다.The present invention relates to a tread rubber composition for a tire. More specifically, the tire has excellent wear performance and wet grip characteristics, maintains low rolling resistance, and is commercially available when silica is used as a filler. The present invention relates to a tread rubber composition which further improves wear resistance and tear strength by increasing filler dispersion.

자동차용 타이어에서 운전자의 안정성을 보장하고 주행 중에 연료소모를 최소화하는 것이 배합설계자의 최대한의 과제이다. 이를 위해 여러 가지 연구가 진행되고 있고 재료 또한 다양하게 개발되고 있다. 일반적으로 타이어의 마찰특성이 우수하면 제동시 차량의 미끌림을 최소화하여 안정성을 유지할 수 있지만 반면에 회전저항이 증가되어 연료소모를 증가시키는 단점이 있다. 따라서 회전저항의 개선과 젖은 노면마찰 특성을 동시에 향상시킬 수 있는 재료들이 개발되어 출시되고 있다.Ensuring driver stability in car tires and minimizing fuel consumption while driving is the greatest challenge for compounding designers. To this end, various studies are underway and various materials are being developed. In general, if the friction characteristics of the tire is excellent, it is possible to maintain stability by minimizing the slippage of the vehicle during braking, whereas the rolling resistance is increased to increase fuel consumption. Therefore, materials that can improve the rolling resistance and the wet road friction characteristics at the same time have been developed and released.

자동차용 고무배합물들은 재료의 종류와 구성성분비에 따라 물리적 특성에 많은 차이가 나타난다. 타이어 트레드 부위에서 가장 필수적으로 요구되는 특성중의 하나가 내마모특성이다. 이를 위해서는 보강성 필러의 경우 입자크기가 작고 구조가 발달된 카본블랙을 다량 배합하면 되지만 이때 배합물의 점도가 상승되어 배합과정에서 높은 열이 발생되고 과도한 스트레스 발생으로 작업이 곤란해진다. 폴리머 측면에서는 SBR 고무의 스티렌 함량을 높이면 어느 정도 마모특성은 개선되지만 고무의 탄성이 낮아져 연료소모량이 증가하는 단점이 있다. 그 밖에 가류시스템의 변화나 오일 함량 변화 등 다양한 방법으로 고무배합물의 물성을 조절할 수 있지만 트레드 고무의 마모특성향상, 젖은 노면마찰특성 강화, 회전저항의 감소를 위해서는 고무배합물의 구성물질 중에서 가장 많은 비율을 차지하는 폴리머의 개선이 우선적으로 요구된다.Rubber compounds for automobiles have many differences in physical properties depending on the type of material and the composition ratio. One of the most essential required characteristics of the tire tread area is wear resistance. To this end, in the case of the reinforcing filler, it is sufficient to mix a large amount of carbon black having a small particle size and a developed structure. At this time, the viscosity of the compound is increased, so that high heat is generated during the compounding process and work is difficult due to excessive stress. In terms of the polymer, increasing the styrene content of the SBR rubber improves the wear characteristics to some extent, but has a disadvantage of increasing the fuel consumption due to the low elasticity of the rubber. In addition, the physical properties of the rubber compound can be controlled by various methods such as changes in the vulcanization system or oil content, but the proportion of the rubber compound is the highest among the components of the rubber compound to improve the wear characteristics of the tread rubber, strengthen the wet road friction characteristics, and reduce the rolling resistance. The improvement of the polymer which occupies is required first.

따라서, 폴리머 제조업체에서는 트레드 고무배합물의 특성을 동시에 향상시키기 위해 다양한 종류의 고무를 제조하고 상품화시키고 있다. 그러나 대부분 스티렌 함량을 높이거나 비닐함량을 높이는 방법으로 성능을 향상시키고 있으며, 일부제품에서는 스티렌과 비닐함량을 동시에 높여 요구성능을 높이고 있지만 고무의 유리전이온도(Tg)가 적합하지 않아 실제 적용시에 원하는 물성을 충족시키고 있지는 못한 실정이다.Accordingly, polymer manufacturers are manufacturing and commercializing various kinds of rubbers to simultaneously improve the properties of the tread rubber compound. However, in most cases, the performance is improved by increasing the styrene content or the vinyl content. In some products, the styrene and vinyl content are simultaneously increased to increase the required performance. However, the glass transition temperature (Tg) of the rubber is not suitable. It does not meet the desired physical properties.

본 발명은 상기 종래 기술이 가지는 문제를 해결하기 위해 안출된 것으로, 그 목적은 타이어의 마모성능과 젖은노면마찰(Wet grip) 성능이 우수하고, 낮은 회전저항을 유지하며, 또한, 필러로서 실리카를 적용하는 경우 상용성을 증가시켜 필러의 분산도를 높임으로써 내마모 및 인열강도를 더욱 개선한 트레드 고무조성물을 제공함에 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and its object is to provide excellent wear performance and wet grip performance of a tire, maintain low rolling resistance, and also use silica as a filler. When applied to increase the dispersibility of the filler by increasing the compatibility to provide a tread rubber composition to further improve the wear resistance and tear strength.

본 발명의 다른 목적은 용액중합 SBR과 BR을 혼합하는 경우 BR의 특성인 반발력과 저발열 특성을 강화하여 제품의 연료절감에 기여할 수 있는 트레드 고무조성물을 제공함에 있다.
Another object of the present invention is to provide a tread rubber composition that can contribute to the fuel savings of the product by reinforcing the repulsive force and low heat generation characteristics of the BR when mixing the solution polymerization SBR and BR.

상기와 같은 목적을 달성하기 위하여 본 발명은 타이어 트레드 고무조성물에 있어서, 원료고무 중에 스티렌 함량이 28∼35％, 비닐 함량이 50∼65％인 용액중합 SBR이 함유됨을 특징으로 하는 타이어 트레드 고무조성물을 제공한다.In order to achieve the above object, the present invention is a tire tread rubber composition, tire tread rubber composition characterized in that the raw material rubber contains a solution polymerization SBR of 28 to 35%, vinyl content of 50 to 65% To provide.

상기에서 원료고무는 스티렌 함량이 28∼35％, 비닐 함량이 50∼65％인 용액중합 SBR과 BR 고무가 4:6∼6:4의 비율로 혼합될 수 있다.In the above raw material rubber, the solution polymerization SBR and BR rubber having a styrene content of 28 to 35% and a vinyl content of 50 to 65% may be mixed in a ratio of 4: 6 to 6: 4.

상기 본 발명의 트레드 고무조성물은 조성 중에 카본블랙 또는 실리카를 단독으로 또는 혼합한 것을 50∼80phr 포함하는 것이 바람직하다.It is preferable that the tread rubber composition of the present invention contains 50 to 80 phr of the carbon black or silica alone or mixed in the composition.

이하, 본 발명의 내용을 보다 상세하게 설명하도록 한다.Hereinafter, the content of the present invention will be described in more detail.

본 발명은 타이어의 트레드 고무에서 마모성능을 높이고 젖은노면마찰(Wet-grip) 특성 및 회전저항 특성을 개선하여 제품의 수명을 늘리고, 마찰력 증대에 의한 안정성 유지 및 낮은 회전저항에 의한 연료소모를 최소한으로 하기 위해 기존 SBR 고무와 달리 미세구조가 다른 용액중합형 SBR을 적용한다.The present invention improves the wear performance in the tread rubber of the tire, improves the wet-grip characteristics and rotational resistance characteristics, increases the life of the product, maintains stability by increasing friction and minimizes fuel consumption due to low rotational resistance. Unlike conventional SBR rubber, a solution-polymerized SBR with different microstructures is applied.

본 발명에 사용되는 용액중합 SBR은 스티렌의 함량이 28∼35％로 높게 하는 것이 바람직하다. 상기 범위의 스티렌의 함량을 통해 폴리머의 유리전이온도(Tg)가 상승되며, 동시에 마모특성이 보강된다. 또한, 용액중합 SBR은 바람직하게는 비닐 함량이 50∼65％로 하여 탄성을 유지하면서 젖은 노면 마찰 특성을 동시에 높이고 Tg 값도 상승시키는 것이 좋다.It is preferable that the solution polymerization SBR used in the present invention has a high styrene content of 28 to 35%. The glass transition temperature (Tg) of the polymer is increased through the content of styrene in the above range, and at the same time, the wear characteristics are reinforced. In addition, the solution-polymerized SBR preferably has a vinyl content of 50 to 65%, while maintaining elasticity, simultaneously increasing wet road friction characteristics and increasing Tg value.

본 발명에 따른 폴리머를 적용하는 경우 고무배합물의 Tg 값이 -10℃ ∼ -20℃ 범위로서 고무의 동작특성에서 마찰과 회전저항 특성의 평가척도인 0℃ tanδ와 60℃ tanδ값에 민감하게 작용하는 영역으로 된다. 즉, 0℃ tanδ는 매우 높여 마찰특성을 증가시키고, 60℃ tanδ는 낮게 하여 회전저항을 낮추도록 한다.When the polymer according to the present invention is applied, the Tg value of the rubber compound is in the range of -10 ° C. to -20 ° C., and sensitively affects the 0 ° C. tanδ and 60 ° C. It becomes an area to say. That is, 0 ℃ tan δ is very high to increase the friction characteristics, 60 ℃ tan δ is to lower the rotational resistance.

본 발명의 바람직한 실시예에 따르면, 일반적으로 사용되는 유화중합형인 SBR 1500(비교예)과 비교하여 특성을 살펴본 결과 마모특성에서 하락없이 마찰 특성과 회전저항 특성이 크게 향상되고 있다. (실시예 1참조)According to a preferred embodiment of the present invention, as a result of looking at the characteristics compared to the commonly used emulsion polymerization type SBR 1500 (Comparative Example), the friction characteristics and rotational resistance characteristics are greatly improved without a drop in wear characteristics. (See Example 1)

상기 본 발명의 트레드 고무조성물은 조성 중에 카본블랙 또는 실리카를 단독으로 또는 혼합한 것을, 특별히 한정되는 것은 아니지만, 바람직하게는 50∼80phr 포함한다. 만일 카본블랙 대신에 실리카로 대체하여 배합하고자 하는 경우 실리카와 고무와의 결합력을 높여주기 위해 커플링제가 추가적으로 배합되어져야 한다. 본 발명에 따른 실험평가결과 실리카는 카본블랙과 비교하여 유사한 물성을 유지할 수 있으며 동적 특성에서도 우수함을 확인할 수 있다 (실시예 2참조). 일반적으로 SBR 고무에서 비닐기와 스티렌 함량이 높을 경우 고무의 극성이 증가하 여 실리카의 분산성이 높아지고 마모특성 및 인열강도가 향상된다.The tread rubber composition of the present invention is not particularly limited, but is preferably 50 to 80 phr of carbon black or silica alone or mixed in the composition. If the compound is to be replaced with silica instead of carbon black, the coupling agent should be additionally added to increase the bonding strength between silica and rubber. Experimental evaluation results according to the present invention can be confirmed that the silica can maintain similar physical properties compared to the carbon black and excellent in the dynamic properties (see Example 2). In general, when the vinyl group and the styrene content of the SBR rubber is high, the polarity of the rubber is increased to increase the dispersibility of silica and to improve the wear characteristics and tear strength.

또한, 본 발명의 원료고무는 스티렌 함량이 28∼35％, 비닐 함량이 50∼65％인 용액중합 SBR과 BR 고무가 4:6∼6:4의 비율로 혼합되는 것이 바람직하다. 상기 제시된 조성범위는 이것에 특별히 한정시키는 취지는 아니며, 본 발명의 실시를 위한 최적의 조건으로 제시되는 것이다. 용액중합 SBR과 BR과의 혼합고무에 대해 평가해 본 결과 BR 고무의 특성인 반발력을 높일 수 있어 회전저항을 더욱 낮출 수 있으며 주행 중 열의 발생을 감소시켜 벨트 부위의 사고를 더욱 감소시킬 수 있는 장점이 있다. In addition, it is preferable that the raw material rubber of the present invention is mixed with a solution polymerization SBR having a styrene content of 28 to 35% and a vinyl content of 50 to 65% in a ratio of 4: 6 to 6: 4. The composition ranges set forth above are not intended to be particularly limited thereto, but are presented as optimum conditions for the practice of the present invention. As a result of evaluating the mixed rubber of solution-polymerized SBR and BR, it is possible to increase the resilience, which is the characteristic of BR rubber, and to lower the rolling resistance, and to reduce the generation of heat during driving, further reducing the accident of the belt part. There is this.

이하 본 발명의 내용을 실시예에 의해 보다 상세하게 설명하기로 한다. 다만 이들 실시예는 본 발명의 내용을 이해하기 위해 제시되는 것일 뿐 본 발명의 권리범위가 이들 실시예에 한정되어지는 것으로 해석되어져서는 아니된다.Hereinafter, the content of the present invention will be described in more detail with reference to Examples. However, these examples are only presented to understand the content of the present invention, and the scope of the present invention should not be construed as being limited to these embodiments.

<비교예> 고무배합물의 제조Comparative Example Preparation of Rubber Compound

고무배합물은 하기 표1의 조성과 같이 SBR1500 100phr, 카본블랙 N220 50phr, ZnO 3phr, 스테아린산 2phr, 6PPD 1phr, RD 1phr, 방향족오일 10phr, 유황 1.8phr, CZ 1.3phr, PVI 0.1phr을 넣고 혼합하여 160℃에서 고무배합물을 방출시켰다. 얻어진 타이어를 대상으로 하는 제반 물성의 측정은 표준방법에 따라 수행되었으며 그 결과는 하기 표 2에 나타내었다.The rubber compound is mixed with 100 phr of SBR1500, 50 phr of carbon black N220, 50 phr of ZnO, 3 phr of stearic acid, 2 phr of 6 ppd, 1 phr of RD, 1 phr of aromatic oil, 10 phr of sulfur, 1.8 phr of sulfur, CZ 1.3 phr, and 0.1 phr of PVI. The rubber blend was released at &lt; RTI ID = 0.0 &gt; Measurement of the overall physical properties of the obtained tire was performed according to the standard method and the results are shown in Table 2 below.

<실시예 1> <Example 1>

원료고무로 용액중합 SBR 100phr을 적용한 것을 제외하고는 비교예와 동일한 과정을 통해 고무배합물을 방출시켰고, 제반 물성의 측정은 표준방법에 따라 수행되었으며 그 결과는 하기 표 2에 나타내었다.Except that 100 phr of solution polymerization SBR was applied as the raw material rubber, the rubber compound was released through the same process as in Comparative Example, and the measurement of the overall physical properties was performed according to the standard method, and the results are shown in Table 2 below.

<실시예 2><Example 2>

원료고무로 용액중합 SBR 100phr을 적용하고, 카본블랙 대신 실리카(Z175) 60phr과 커플링제 X50S 10phr, DPG 1.5phr을 적용한 것을 제외하고는 실시예 1과 동일한 과정을 통해 고무배합물을 방출시켰고, 제반 물성의 측정은 표준방법에 따라 수행되었으며 그 결과는 하기 표 2에 나타내었다. The rubber compound was discharged through the same process as in Example 1 except that 100 phr of solution polymerization SBR was used as raw material rubber, and 60 phr of silica (Z175), 10 phr of coupling agent X50S, and 1.5 phr of DPG were used instead of carbon black. Was measured according to the standard method and the results are shown in Table 2 below.

<실시예 3><Example 3>

원료고무로 용액중합 SBR 60phr, BR01 40phr을 적용하고, 카본블랙 N220 20phr, 실리카 Z175 30phr, 커플링제 Z50S 5phr 및 DPG 1.5phr을 적용한 것을 제외하고는 실시예 1과 동일한 과정을 통해 고무배합물을 방출시켰고, 제반 물성의 측정은 표준방법에 따라 수행되었으며 그 결과는 하기 표 2에 나타내었다. The rubber compound was discharged through the same process as in Example 1, except that solution polymerization SBR 60phr, BR01 40phr were applied, and carbon black N220 20phr, silica Z175 30phr, coupling agent Z50S 5phr and DPG 1.5phr were applied. In addition, the measurement of various physical properties was performed according to standard methods, and the results are shown in Table 2 below.

<표 1> 배합비 (단위: phr)<Table 1> Compounding ratio (unit: phr)

성분ingredient 비교예Comparative example 실시예1Example 1 실시예2Example 2 실시예3Example 3 SBR1500SBR1500 100100 -- -- -- Sol-SBR1) Sol-SBR 1) -- 100100 100100 6060 BR 01BR 01 -- -- -- 4040 N220N220 5050 5050 -- 2020 Z175, SiO2 Z175, SiO 2 -- -- 6060 3030 X 50SX 50S -- -- 1010 55 ZnOZnO 33 33 33 33 스테아린산Stearic acid 22 22 22 22 6PPD6PPD 1One 1One 1One 1One RDRD 1One 1One 1One 1One 방향족오일Aromatic oils 1010 1010 1010 1010 유황brimstone 1.81.8 1.81.8 1.81.8 1.81.8 CZCZ 1.31.3 1.31.3 1.31.3 1.31.3 PVIPVI 0.10.1 0.10.1 0.10.1 0.10.1 DPGDPG -- -- 1.51.5 1.51.5

1) Sol-SBR: 스티렌 함량 30％이고, 나머지 70％의 폴리부타디엔 성분 중에서 비닐구조가 55％로 구성1) Sol-SBR: 30% styrene content and 55% vinyl structure among the remaining 70% polybutadiene components

<표 2>TABLE 2

평가항목Evaluation item 비교예Comparative example 실시예1Example 1 실시예2Example 2 실시예3Example 3 경도(shore A)Hardness (shore A) 6464 6363 6767 6666 300％모듈러스(kg/㎠)300% modulus (kg / ㎠) 9696 9292 110110 100100 인장강도(T.S)(kg/㎠)Tensile Strength (T.S) (kg / ㎠) 230230 190190 180180 180180 신율(％)Elongation (%) 540540 450450 470470 430430 Tanδ(0℃)Tanδ (0 ℃) 0.210.21 0.440.44 0.470.47 0.290.29 Tanδ(70℃)Tanδ (70 ° C) 0.1370.137 0.120.12 0.100.10 0.100.10 Tg(℃)Tg (℃) -37.7-37.7 -15.6-15.6 -16-16 -26-26 Heat build up(℃)Heat build up (℃) 3535 2828 2525 2222 피코마모량(mg)Amount of picoma (mg) 29.529.5 3030 3232 2525 점도(100℃)Viscosity (100 ° C) 5858 5757 6262 6161

본 발명에 의한 트레드 고무조성물은 마모성능과 Wet-grip 성능이 우수하고, 낮은 회전저항을 유지할 수 있다. 또한, 미세구조에서 극성의 특성이 높아져 실리 카와의 상용성 증가로 필러의 분산도를 높여 내마모 및 인열강도를 더 높일 수 있다. 또한, SBR과 BR을 혼합하는 경우 BR의 특성인 반발력과 저발열 특성을 강화하여 제품의 연료절감에 기여도를 크게 할 수 있다. The tread rubber composition according to the present invention is excellent in wear performance and wet-grip performance, and can maintain low rotational resistance. In addition, the characteristics of the polarity in the microstructure is increased to increase the dispersibility of the filler by increasing the compatibility with silica can further increase the wear resistance and tear strength. In addition, when the SBR and BR are mixed, the resilience and low heat generation characteristics of the BR can be enhanced to contribute to the fuel saving of the product.

Claims (3)

타이어 트레드 고무조성물에 있어서, In the tire tread rubber composition, 원료고무 중에 스티렌 함량이 28∼35％, 비닐 함량이 50∼65％인 용액중합 SBR이 함유되어 이러한 고무를 포함하는 고무배합물의 유리전이온도(Tg)가 -10℃∼-20℃인 타이어 트레드 고무조성물.Tire tread with a glass transition temperature (Tg) of the rubber compound containing such a rubber, containing a solution-polymerized SBR containing 28 to 35% styrene and 50 to 65% vinyl in the raw material rubber. Rubber composition. 제 1항에 있어서, 원료고무는 스티렌 함량이 28∼35％, 비닐 함량이 50∼65％인 용액중합 SBR과 BR 고무가 4:6∼6:4의 비율로 혼합됨을 특징으로 하는 타이어 트레드 고무조성물The tire tread rubber according to claim 1, wherein the raw material rubber is mixed with a solution-polymerized SBR having a styrene content of 28 to 35% and a vinyl content of 50 to 65% in a ratio of 4: 6 to 6: 4. Composition 제 1항 또는 제 2항에 있어서, 카본블랙 또는 실리카를 단독으로 또는 혼합한 것을 50∼80phr 포함함을 특징으로 하는 타이어 트레드 고무조성물The tire tread rubber composition according to claim 1 or 2, comprising 50 to 80 phr of carbon black or silica alone or mixed.
KR1020030084125A 2003-11-25 2003-11-25 Tread Rubber Compound with The Properties of High Wet Grip and Low Rolling Resistance KR100569869B1 (en)

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