KR20060033580A - Tread compound for truck and bus tire improved abrasion - Google Patents
Tread compound for truck and bus tire improved abrasion Download PDFInfo
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- KR20060033580A KR20060033580A KR1020040082755A KR20040082755A KR20060033580A KR 20060033580 A KR20060033580 A KR 20060033580A KR 1020040082755 A KR1020040082755 A KR 1020040082755A KR 20040082755 A KR20040082755 A KR 20040082755A KR 20060033580 A KR20060033580 A KR 20060033580A
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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
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
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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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- 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
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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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
본 발명은 공지의 트럭 및 버스 타이어용 트레드 고무 조성물에 있어서, 원료고무 100중량부에 대해 질소흡착 비표면적이 130 ~ 150㎡/g이고, DBP 흡착량이 120 ~ 140㎖/㎎인 카본블랙(이하, '카본블랙 1'이라 함) 25 ~ 35중량부, 질소흡착 비표면적이 90 ~ 110㎡/g이고, DBP 흡착량이 105 ~ 125㎖/㎎인 카본블랙(이하, '카본블랙 2'이라 함) 15 ~ 30중량부, 공정조제 0.1 ~ 5중량부 포함함을 특징으로 한다.In the tread rubber composition for known truck and bus tires, the present invention relates to carbon black having a nitrogen adsorption specific surface area of 130 to 150 m 2 / g and a DBP adsorption amount of 120 to 140 ml / mg based on 100 parts by weight of raw rubber. , Carbon black 1) 25 to 35 parts by weight, nitrogen adsorption specific surface area of 90 ~ 110㎡ / g, DBP adsorption amount of 105 ~ 125ml / ㎎ carbon black (hereinafter referred to as 'carbon black 2' 15 to 30 parts by weight, characterized in that it comprises 0.1 to 5 parts by weight of the process aid.
상기와 같이, 본 발명은 트럭 버스용 타이어의 트레드 고무의 보강제로 사용되는 입자크기가 작고 구조가 발달한 마모에 유리한 카본블랙 1과, 입자크기가 크고 구조가 덜 발달한 발열 및 공정성에 유리한 카본블랙 2를 혼용 사용함과 동시에 카본함량을 증가시키면서 발열 및 공정성에 유리한 특성을 가지는 약품을 함께 배합시킴으로써 내구력성능 및 발열성능 하락 없이 내마모성능을 향상시킬 수 있다.As described above, the present invention is carbon black 1, which is advantageous for the wear of small particle size and developed structure, and carbon, which is advantageous in heat generation and processability, which has a large particle size and less structure, which is used as a reinforcement of the tread rubber of a truck bus tire. By using Black 2 at the same time and increasing the carbon content while mixing the chemicals having favorable properties for heat generation and processability, wear resistance performance can be improved without deterioration in durability performance and heat generation performance.
내마모성, 트레드, 발열성능Abrasion Resistance, Tread, Heat Generation Performance
Description
본 발명은 트럭 및 버스 타이어용 트레드 고무 조성물에 관한 것으로, 특히 내구력성능 및 발열성능의 하락 없이 내마모성능을 향상시킨 트럭 및 버스 타이어용 트레드 고무 조성물에 관한 것이다.The present invention relates to a tread rubber composition for truck and bus tires, and more particularly to a tread rubber composition for truck and bus tires with improved wear resistance without a decrease in durability performance and heat generation performance.
최근에 자동차의 고성능화나 고속도로의 발달로 인하여 트럭이나 버스 등의 차량에 있어서 주행속도는 증가할 뿐만 아니라 규제 완화로 적재 중량의 증가 등으로 인하여 트럭 및 버스용 타이어의 가혹도는 커지고 있다. 따라서 이런 가혹 조건하에서의 우수한 내마모성을 가지는 트레드 고무가 요구되고 있다. 또한, 일반 승용차보다는 훨씬 장거리를 주행하는 트럭 및 버스용 타이어에 있어서는 우수한 발열 성능도 요구되고 있다.Recently, due to the high performance of automobiles and the development of highways, not only the driving speed is increased in vehicles such as trucks and buses, but also the severity of truck and bus tires is increasing due to the increase in load weight due to deregulation. Therefore, there is a need for a tread rubber having excellent wear resistance under such harsh conditions. In addition, in the tires for trucks and buses that travel much longer than ordinary cars, excellent heat generation performance is also required.
종래에는 타이어 내마모성의 결정 요인으로, 고무 조성물의 보강제로 사용되는 카본블랙의 입자크기나 구조가 지배요인으로 생각되어져 왔고, 카본블랙의 입자크기가 작을수록 내마모성은 향상되지만, 공정성 및 발열성능이 저하되는 것으로 알려져 있다. 또한, 카본블랙의 구조가 발달할수록 내마모성능은 향상되지만, 공정성 및 발열성능은 하락하는 문제가 있다.Conventionally, as a determinant of tire wear resistance, the particle size and structure of carbon black used as a reinforcing agent of the rubber composition have been considered as the dominant factor. The smaller the particle size of the carbon black is, the better the wear resistance is, but the processability and heat generation performance are deteriorated. It is known to become. In addition, as the structure of carbon black develops, wear resistance is improved, but processability and exothermic performance are deteriorated.
그리고 카본블랙의 사용량이 증가함에 따라 내마모성능은 향상되는 경향을 보이나, 일정량 이상 사용하면 급격하게 공정성 및 발열성능이 하락될 뿐만 아니라 내마모성도 저하되는 경향을 보인다.The wear resistance tends to increase as the amount of carbon black used increases, but if a certain amount is used, the wearability also decreases as well as the fairness and the exothermic performance.
상기와 같이 공정성도 개선하고 마모성능도 향상시킨 고무조성물의 개발이 행해지고 있다. 그 일례로, 일본국 공개특허공보 소63-112638(명칭 : 타이어 트레드용 고무 조성물)에서는 카본블랙의 어그리게이트(aggregate)가 브로드(broad)한 카본블랙을 적용한 고무조성물을 개발하였고, 일본국 공개특허공보 소61 - 207452(명칭 : 타이어 트레드용 고무 조성물) 등에서는 고무와의 반응성이 우수한 표면이 개질된 카본블랙을 사용한 고무조성물을 개발하였다.As described above, development of a rubber composition having improved processability and improved wear performance has been performed. For example, Japanese Laid-Open Patent Publication No. 63-112638 (name: tire tread rubber composition) has developed a rubber composition using carbon black, which is broad in aggregate of carbon black. [0003] In Japanese Patent Laid-Open No. 61-207452 (name: Rubber composition for tire tread), a rubber composition using carbon black having a surface modified with excellent reactivity with rubber has been developed.
그러나, 트럭-버스용 타이어에 대한 요구성능은 점점 증대되고 있지만, 상기와 같은 특허 등에서 제시한 고무 조성물로는 최근에 성능(우수한 발열성능을 가지면서 가혹조건에서의 마모성능을 가지는 타이어)에 쉽게 대응하기 어려울 뿐만 아니라 원재료 수급 및 가격적인 측면에서 대량 생산에 적용하기에는 어려운 게 현실이다.However, although the required performance for truck-bus tires is increasing, rubber compositions proposed in the above patents are easily used for performances (tires having excellent heat generating performance and wear performance under severe conditions) in recent years. Not only is it difficult to cope, it is also difficult to apply to mass production in terms of supply and demand for raw materials.
상기와 같은 목적을 이루기 위해 안출된 것으로, 본 발명은 트럭 버스용 타이어의 트레드 고무의 보강제로 사용되는 입자크기가 작고 구조가 발달한 마모에 유리한 카본블랙 1과, 입자크기가 크고 구조가 덜 발달한 발열 및 공정성에 유리한 카본블랙 2를 혼용 사용함과 동시에 카본함량을 증가시키면서 발열 및 공정성에 유리한 특성을 가지는 약품을 함께 배합시켜 내구력성능 및 발열성능 하락 없이 내마모성능을 향상시키는 데 있다.
Invented to achieve the above object, the present invention is carbon black 1, which is advantageous for the wear of the structure is small and the particle size is used as a reinforcement of the tread rubber of the tire for truck buses, the particle size is large and the structure is less developed In addition to using a mixture of carbon black 2, which is advantageous for heat generation and fairness, and simultaneously increasing the carbon content, a compound having advantageous properties for heat generation and fairness is mixed together to improve wear resistance without deterioration in durability performance and heat generation performance.
상기 목적을 달성하기 위하여 본 발명은 공지의 트럭 및 버스 타이어용 트레드 고무 조성물에 있어서, 원료고무 100중량부에 대해 질소흡착 비표면적이 130 ~ 150㎡/g이고, DBP 흡착량이 120 ~ 140㎖/㎎인 카본블랙(이하, '카본블랙 1'이라 함) 25 ~ 35중량부, 질소흡착 비표면적이 90 ~ 110㎡/g이고, DBP 흡착량이 105 ~ 125㎖/㎎인 카본블랙(이하, '카본블랙 2'이라 함) 15 ~ 30중량부, 공정조제 0.1 ~ 5중량부 포함함을 특징으로 한다.In order to achieve the above object, the present invention is a known tread rubber composition for truck and bus tires, the nitrogen adsorption specific surface area is 130 ~ 150 m 2 / g to 100 parts by weight of the raw material rubber, DBP adsorption amount 120 ~ 140ml / 25 mg to 35 parts by weight of carbon black (hereinafter referred to as' carbon black 1 '), nitrogen adsorption specific surface area of 90 to 110 m 2 / g, and carbon black having a DBP adsorption amount of 105 to 125 ml / mg (hereinafter,' Carbon black 2 ') 15 to 30 parts by weight, characterized in that it comprises 0.1 to 5 parts by weight of the process aid.
상기 공정조제로는 바람직하게는, 아연 : 칼륨의 비가 3:1인 징크 소프(Zinc Soap, 명칭 : EF-44, 제조사 : STRUCTOL)를 적용시킨다.Preferably, as the process aid, zinc soap (Zinc Soap, name: EF-44, manufacturer: STRUCTOL) having a 3: 1 ratio of zinc to potassium is applied.
상기에서 카본블랙 1을 25중량부 미만으로 첨가시키면 마모성능이 하락하며, 카본블랙 1을 35중량부를 초과하여 첨가시키면 발열이 급격히 상승하므로 바람직하지 못하다.When the carbon black 1 is added below 25 parts by weight, the wear performance is lowered. When the carbon black 1 is added above 35 parts by weight, heat generation rises rapidly, which is not preferable.
또한, 상기에서 카본블랙 2를 15중량부 미만으로 첨가시키면 발열이 상승하며, 카본블랙 2를 30중량부를 초과하여 첨가시키면 마모성능이 하락하므로 바람직하지 못하다.In addition, when the carbon black 2 is added below 15 parts by weight, heat generation is increased, and when the carbon black 2 is added above 30 parts by weight, wear performance is lowered, which is not preferable.
또한, 상기에서 공정조제를 5중량부를 초과하여 첨가시키면 물성이 하락하므로 바람직하지 못하다.In addition, the addition of the process aid in excess of 5 parts by weight is not preferable because the physical properties are lowered.
상기 원료고무로는 천연고무, 스티렌-부타디엔 고무, 부타디엔 고무 또는 이들의 혼용 고무 등을 사용할 수 있다.As the raw material rubber, natural rubber, styrene-butadiene rubber, butadiene rubber or mixed rubber thereof may be used.
다음 표 1은 본 발명에 사용되는 카본블랙 1 및 카본블랙 2의 특성을 비교한 것이다.Table 1 compares the properties of Carbon Black 1 and Carbon Black 2 used in the present invention.
<표 1>카본블랙 1 및 카본블랙 2의 특성 비교Table 1 Comparison of Properties of Carbon Black 1 and Carbon Black 2
1)상기 질소흡착 비표면적은 표면적을 나타내는 값으로, 카본블랙 단위 g당 질소가 흡착된 면적(㎡)을 표시하는 값으로, 그 수치가 클수록 입자 크기가 작다는 것을 나타낸다.1) The nitrogen adsorption specific surface area represents a surface area and represents an area (m 2) in which nitrogen is adsorbed per unit of carbon black, and the larger the value, the smaller the particle size.
2)DBP 흡착량은 카본블랙의 구조를 나타내는 값으로, DBP(DiButyl Phthalate)에 의한 흡착량 측정법으로, 그 수치가 클수록 발단된 구조를 나타낸다.2) DBP adsorption amount is a value representing the structure of carbon black, and the adsorption amount measurement method by DBP (DiButyl Phthalate) shows a structure that is developed as the value becomes larger.
이하, 실시예 및 비교예를 통하여 본 발명을 보다 상세히 설명한다. 그러나, 본 발명은 이들 실시예에 국한되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to these examples.
<비교예 1>Comparative Example 1
다음 표 2에 지시된 배합비와 같이, 천연고무 100중량부에 대해 카본블랙 1 50중량부, 아연화 3.5중량부, 스테아린산 2중량부, 오존노화방지제 1.5중량부, 노화방지제 1중량부, 왁스 1중량부, 오일 3중량부, 황 1.6중량부, 가류 촉진제 1.0중량부를 포함하며, 이를 밴버리믹서를 이용하여 트레드 고무시편을 제조하였다.As shown in the compounding ratio shown in Table 2 below, based on 100 parts by weight of natural rubber, 50 parts by weight of carbon black 1, 3.5 parts by weight of zinc, 3.5 parts by weight of stearic acid, 1.5 parts by weight of an ozonation inhibitor, 1 part by weight of anti-aging agent, and 1 weight of wax Part, 3 parts by weight of oil, 1.6 parts by weight of sulfur, 1.0 part by weight of vulcanization accelerator, and a tread rubber specimen was prepared using a Banbury mixer.
<비교예 2>Comparative Example 2
카본블랙 1을 30중량부 적용하고, 카본블랙 2 20중량부를 더 적용시키는 것을 제외하고는 상기 비교예와 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.A rubber specimen was manufactured using the same composition, composition, and method as in Comparative Example, except that 30 parts by weight of carbon black 1 and 20 parts by weight of carbon black 2 were further applied.
<실시예 1><Example 1>
카본블랙 1을 30중량부 적용하고, 카본블랙 2 23중량부 및 공정조제 3중량부를 더 적용시키는 것을 제외하고는 상기 비교예와 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.30 parts by weight of carbon black 1 was applied, and 23 parts by weight of carbon black 2 and 3 parts by weight of a process aid were used to prepare a rubber specimen using the same composition, composition ratio, and method as in Comparative Example.
<실시예 2><Example 2>
카본블랙 1을 30중량부 적용하고, 카본블랙 2 25중량부 및 공정조제 3중량부를 더 적용시키는 것을 제외하고는 상기 비교예와 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.A rubber specimen was prepared using the same composition, composition, and method as in Comparative Example, except that 30 parts by weight of carbon black 1 was applied, and 25 parts by weight of carbon black 2 and 3 parts by weight of a process aid were applied.
<표 2> 비교예1, 2 및 실시예1, 2의 고무조성물TABLE 2 Rubber compositions of Comparative Examples 1 and 2 and Examples 1 and 2
<시험예 1><Test Example 1>
비교예와 실시예 고무시편을 ASTM 관련규정에 의하여 물성을 측정하였으며 그 결과는 다음 표 2에 나타난 바와 같다.Comparative Examples and Examples The rubber specimens were measured for physical properties according to ASTM-related regulations, and the results are shown in Table 2 below.
(1)발열성능은 온도상승이 낮을수록 우수한 것을 나타낸다.(1) The heat generation performance shows that the lower the temperature rise, the better.
(2)마모성능은 발생량이 적을수록 우수한 것을 나타낸다.(2) The abrasion performance shows that the smaller the amount generated, the better.
(3)모듈러스(3) modulus
측정은 시편을 아령형으로 잘라서 인스트론사에서 제작한 인장시험기(모델 4502)로 실시한다. 300% 모듈러스는 시편을 300% 신장시켰을 경우 시편에 작용하는 스트레스를 일컫는 것으로, 그 수치가 높을수록 우수한 성능을 나타낸다.The measurement is carried out with a tensile tester (Model 4502) manufactured by Instron, by cutting the specimen into dumbbells. 300% modulus refers to the stress acting on the specimen when the specimen is stretched 300%. The higher the value, the better the performance.
<표 3> 비교예1, 2 및 실시예1, 2의 물성측정결과<Table 3> Measurement results of the physical properties of Comparative Examples 1 and 2 and Examples 1 and 2
상기 표 3에 나타난 바와 같이 물성측정결과는 다음과 같다.As shown in Table 3, the physical property measurement results are as follows.
1)본 발명에 따른 실시예는 인장물성 및 발열성능면에서 비교예와 동등 이상임을 알 수 있다.1) The embodiment according to the present invention can be seen that the equivalent to the comparative example in terms of tensile properties and exothermic performance.
2)발명에 따른 실시예는 내마모성능면에서 비교예보다 월등히 향상되었음을 알 수 있다.2) Example according to the invention can be seen that the improvement in wear resistance than the comparative example.
<시험예 2><Test Example 2>
상기 비교예와 실시예에 따른 트럭 버스용 타이어의 트레드 고무조성물로 제조한 타이어(규격 : 12R22.5 16PR)의 내구력 성능(ECER-40) 및 실차마모를 측정하였으며, 그 결과는 다음 표 4에 나타난 바와 같다.The durability performance (ECER-40) and the actual vehicle wear of the tire (standard: 12R22.5 16PR) manufactured from the tread rubber composition of the truck bus tire according to the comparative example and the embodiment were measured, and the results are shown in Table 4 below. As shown.
(1)내구력 시험은 주행시간이 길수록 우수한 성능을 나타낸다.(1) The durability test shows better performance with longer running time.
(2)실차 마모는 인덱스(Index)값이 높을수록 내마모성능이 우수한 것을 나타낸다.(2) Actual vehicle wear indicates that the higher the index value, the better the wear resistance.
<표 4> 비교예1, 2 및 실시예1, 2의 내구력 시험 및 실차마모 측정결과<Table 4> Durability test and actual vehicle wear measurement results of Comparative Examples 1 and 2 and Examples 1 and 2
상기 표 4에 나타난 바와 같이 내구력 시험 및 실차마모 측정결과는 다음과 같다.As shown in Table 4, the durability test and the actual vehicle wear measurement results are as follows.
1)본 발명에 따른 실시예는 내구력 성능면에서 비교예와 동등 이상임을 알 수 있다.1) The embodiment according to the present invention can be seen that the equivalent to the comparative example in terms of durability performance.
2)발명에 따른 실시예는 내마모성능면에서 비교예보다 월등히 향상되었음을 알 수 있다.2) Example according to the invention can be seen that the improvement in wear resistance than the comparative example.
상기와 같이, 본 발명은 트럭 버스용 타이어의 트레드 고무의 보강제로 사용되는 입자크기가 작고 구조가 발달한 마모에 유리한 카본블랙 1과, 입자크기가 크고 구조가 덜 발달한 발열 및 공정성에 유리한 카본블랙 2를 혼용 사용함과 동시에 카본함량을 증가시키면서 발열 및 공정성에 유리한 특성을 가지는 약품을 함께 배합시킴으로써 내구력성능 및 발열성능 하락 없이 내마모 성능을 향상시킬 수 있다.As described above, the present invention is carbon black 1, which is advantageous for the wear of small particle size and developed structure, and carbon, which is advantageous in heat generation and processability, which has a large particle size and less structure, which is used as a reinforcement for tread rubber of truck bus tires. By using Black 2 simultaneously and increasing the carbon content while mixing the chemicals having favorable properties for heat generation and processability, the wear resistance performance can be improved without a decrease in durability and heat generation performance.
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