KR100449890B1 - Tire tread rubber composition for bus - Google Patents

Tire tread rubber composition for bus Download PDF

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Publication number
KR100449890B1
KR100449890B1 KR10-2001-0055448A KR20010055448A KR100449890B1 KR 100449890 B1 KR100449890 B1 KR 100449890B1 KR 20010055448 A KR20010055448 A KR 20010055448A KR 100449890 B1 KR100449890 B1 KR 100449890B1
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rubber
weight
parts
vulcanization accelerator
tread rubber
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KR10-2001-0055448A
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Korean (ko)
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KR20030022477A (en
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김명선
이화우
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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
    • C08L7/00—Compositions of natural rubber
    • 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
    • C08K3/06—Sulfur
    • 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
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
    • C08K5/31—Guanidine; Derivatives thereof
    • 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
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/43—Compounds containing sulfur bound to nitrogen
    • C08K5/44—Sulfenamides
    • 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
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant

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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

본 발명은 버스용 타이어 트레드 고무조성물에 관한 것이다.The present invention relates to a tire tread rubber composition for a bus.

본 발명의 버스용 타이어 트레드 고무조성물은 공지의 버스용 트레드 고무조성물에 있어서, 천연고무 50∼60 중량부, 폴리부타디엔 고무 20∼25 중량부, 폴리스티렌부타디엔고무 20∼25 중량부 혼합물의 원료고무 100 중량부에 대하여 유황 1∼2.0 중량부, 가황촉진제(1)을 0.5∼2.0 중량부, 가황촉진제(2)를 0.1∼0.5 중량부 포함하는 것을 특징으로 한다.The bus tread rubber composition for buses of the present invention is a raw material rubber of a mixture of 50 to 60 parts by weight of natural rubber, 20 to 25 parts by weight of polybutadiene rubber, and 20 to 25 parts by weight of polystyrene butadiene rubber in a known bus tread rubber composition. 1 to 2.0 parts by weight of sulfur, 0.5 to 2.0 parts by weight of vulcanization accelerator (1) and 0.1 to 0.5 parts by weight of vulcanization accelerator (2).

본 발명은 천연고무, 폴리부타디엔 고무에 폴리스티렌부타디엔 고무를 첨가하여 이들의 혼합물을 원료고무로 사용함으로써 트레드 고무의 마모성능, 내구력을 향상시키는 것을 목적으로 한다. 또한 발열에 의한 물성노화를 최소화하기 위해 종래의 트레드 고무조성물 보다 유황을 소량 사용하고, 이종의 가황촉진제를 고무조성물에 첨가하여 트레드 고무의 내열성을 향상시키는 것을 본 발명의 또다른 목표로 한다.An object of the present invention is to improve the wear performance and durability of tread rubber by adding polystyrene butadiene rubber to natural rubber and polybutadiene rubber and using a mixture thereof as raw material rubber. In addition, in order to minimize physical property aging due to heat generation, a smaller amount of sulfur is used than a conventional tread rubber composition, and another type of vulcanization accelerator is added to the rubber composition to improve the heat resistance of the tread rubber.

Description

버스용 타이어 트레드 고무조성물{Tire tread rubber composition for bus}Tire tread rubber composition for bus

본 발명은 버스용 타이어 트레드 고무조성물에 관한 것으로 보다 상세하게는 원료고무로 천연고무, 폴리부타디엔 고무 및 폴리스티렌부타디엔 고무의 3종 혼합고무를 사용하고 소량의 유황과 다량의 가황촉진제를 첨가하는 저유황 고촉진법을 이용하여 내마모성, 내열성 및 내구력이 우수한 버스용 트레드 고무를 제조할 수 있는 트레드 고무조성물에 관한 것이다.The present invention relates to a tire tread rubber composition for buses. More specifically, low-sulfur sulfur containing three kinds of mixed rubbers of natural rubber, polybutadiene rubber and polystyrene butadiene rubber as a raw material rubber and adding a small amount of sulfur and a large amount of vulcanization accelerator The present invention relates to a tread rubber composition capable of producing a tread rubber for buses having excellent wear resistance, heat resistance and durability.

일반적으로 버스에 사용되는 공기압 타이어의 트레드 고무는 천연고무와 합성고무를 주원료로 하고 고무의 물성 향상을 위해 기타 첨가제로 카본블랙, 노화방지제, 연화제 및 가류제를 첨가하여 주행중 발생하는 열에 의한 물성노화가 최소화되는 방향으로 설계한다.In general, the tread rubber of pneumatic tires used in buses are made of natural rubber and synthetic rubber as main raw materials, and carbon black, anti-aging agent, softener and vulcanizing agent are added as other additives to improve rubber properties. Design in the direction to minimize.

트레드 고무에 원료고무로 천연고무만을 사용하면 내열성은 우수하나 마모성능이 다소 하락하여 천연고무와 합성고무 특히 폴리부타디엔 고무를 첨가하여 내마모성능을 향상시키고 있다.When only natural rubber is used as a raw rubber for tread rubber, it has excellent heat resistance, but abrasion performance decreases slightly, and natural rubber and synthetic rubber, especially polybutadiene rubber, are added to improve wear resistance.

동일한 노선을 일정주기로 주행하는 버스용 타이어 트레드는 우수한 마모성능이 요구되어 통상적으로 타이어 트레드 고무의 원료고무는 천연고무와 폴리부타디엔 고무를 혼합하여 설계하여 마모성능은 어느정도 소비자들의 요구수준에 부합시켜 왔으나 반복되는 정지와 출발에 의해 축적되는 열에 의한 고무의 물성노화가 급속하게 진행되어 트레드가 분리되는 문제가 종종 발생하고 있는 문제가 있다.Tire treads for buses running on the same line at regular intervals require excellent wear performance. Typically, the raw material of tire tread rubber is designed by mixing natural rubber and polybutadiene rubber. There is a problem in that the physical properties of rubber due to heat accumulated by repeated stop and start proceed rapidly, and the tread is separated.

본 발명은 상기와 같은 문제점을 해결하기 위해 천연고무, 폴리부타디엔 고무에 폴리스티렌부타디엔 고무를 첨가하여 이들의 혼합물을 원료고무로 사용함으로써 트레드 고무의 마모성능, 내구력을 향상시키는 것을 목적으로 한다.The present invention aims to improve the wear performance and durability of the tread rubber by adding polystyrene butadiene rubber to natural rubber and polybutadiene rubber and using a mixture thereof as a raw material rubber to solve the above problems.

또한 발열에 의한 물성노화를 최소화하기 위해 종래의 트레드 고무조성물 보다 유황을 소량 사용하고, 이종의 가황촉진제를 고무조성물에 첨가하여 트레드 고무의 내열성을 향상시키는 것을 본 발명의 또다른 목표로 한다.In addition, in order to minimize physical property aging due to heat generation, a smaller amount of sulfur is used than a conventional tread rubber composition, and another type of vulcanization accelerator is added to the rubber composition to improve the heat resistance of the tread rubber.

본 발명의 버스용 타이어 트레드 고무조성물은 공지의 버스용 트레드 고무조성물에 있어서, 천연고무 50∼60 중량부, 폴리부타디엔 고무 20∼25 중량부, 폴리스티렌부타디엔고무 20∼25 중량부 혼합물의 원료고무 100 중량부에 대하여 유황 1∼2.0 중량부, 가황촉진제(1)을 0.5∼2.0 중량부, 가황촉진제(2)를 0.1∼0.5 중량부 포함하는 것을 특징으로 한다.The bus tread rubber composition for buses of the present invention is a raw material rubber of a mixture of 50 to 60 parts by weight of natural rubber, 20 to 25 parts by weight of polybutadiene rubber, and 20 to 25 parts by weight of polystyrene butadiene rubber in a known bus tread rubber composition. 1 to 2.0 parts by weight of sulfur, 0.5 to 2.0 parts by weight of vulcanization accelerator (1) and 0.1 to 0.5 parts by weight of vulcanization accelerator (2).

본 발명에서 원료고무로 사용하는 천연고무는 트레드의 발열특성 문제로 인해 천연고무는 50∼60 중량부 사용하는 것이 좋고, 폴리부타디엔 고무는 마모성능을 유지하기 위해 20∼25 중량부 사용하는 것이 좋으며, 폴리스티렌부타디엔 고무는 트레드부의 균일한 마모를 위해 20∼25 중량부 사용하는 것이 좋다.In the present invention, the natural rubber used as the raw material rubber is preferably 50 to 60 parts by weight of natural rubber due to the heat generation characteristics of the tread, and 20 to 25 parts by weight of polybutadiene rubber is preferably used to maintain abrasion performance. , Polystyrene butadiene rubber is preferably used 20 to 25 parts by weight for uniform wear of the tread portion.

한편 폴리부타디엔 고무는 통상적으로 cis 함량이 97% 이상인 상업화된 것을 사용하고, 폴리스티렌부타디엔 고무는 적절한 트랙션을 발휘하는 것을 사용하기 위해 스티렌 함량이 30∼40%인 것을 사용한다.Polybutadiene rubber, on the other hand, is commercially available in the cis content of 97% or more, and polystyrene butadiene rubber is used in the styrene content of 30 to 40% in order to use the appropriate traction.

본 발명의 트레드 고무조성물은 상기의 원료고무와 저유황 고촉진제법을 이용하여 내구력, 내마모성 및 내열성능이 향상된 트레드 고무를 제조할 수 있다. 상기에서 저유황 고촉진법은 통상적으로 트레드 고무 제조시 사용하는 유황 및 가황촉진제의 사용량과 비교하여 소량의 유황과 다량의 가황촉진제를 사용하는 것을 의미한다.The tread rubber composition of the present invention can be used to produce a tread rubber with improved durability, wear resistance and heat resistance using the raw material rubber and low sulfur high accelerator. The low sulfur high accelerator method means using a small amount of sulfur and a large amount of vulcanization accelerator as compared with the amount of sulfur and vulcanization accelerator used in the manufacture of tread rubber.

특히 본 발명에서는 한종류의 가류촉진제를 사용하지 않고, 높은 모듈러스를 유지하며 고온배합에서 유리한 1차 가류촉진제와 이러한 가류촉진제와 병행 사용시 1차 가류촉진제의 사용효과를 더욱 증대할 수 있는 2차 가류촉진제를 사용한다.In particular, the present invention does not use one kind of vulcanization accelerator, maintains high modulus and is advantageous in high temperature mixing, and secondary vulcanization which can further increase the effect of using the primary vulcanization accelerator when used in combination with such vulcanization accelerator. Use accelerators.

즉, 본 발명에서는 원료고무 100 중량부에 대하여 유황 1∼2.0 중량부, 가황촉진제(1)을 0.5∼2.0 중량부, 가황촉진제(2)를 0.1∼0.5 중량부 트레드 고무조성물에 첨가하여 트레드 고무를 제조시 내구력, 내마모성 및 내열성능이 향상된 트레드 고무조성물을 얻고자 한다.That is, in the present invention, 1 to 2.0 parts by weight of sulfur, 0.5 to 2.0 parts by weight of vulcanization accelerator (1), and 0.1 to 0.5 parts by weight of vulcanization accelerator (2) are added to the tread rubber composition based on 100 parts by weight of the raw material rubber. To prepare a tread rubber composition with improved durability, wear resistance and heat resistance.

본 발명에서 사용하는 가황촉진제에 있어서, 가황촉진제(1)은 천연고무 또는 디엔고무의 지효성 준초촉진제로서 높은 모듈러스를 유지하며 고무 배합에서 유리한 N-t-부틸-벤조티아졸-설펜아미드(N-t-butyl-benzothiazole-sulfenamide, NS)를 사용할 수 있으며, 가황촉진제(2)는 N-시클로헥실-2-벤조티아졸설펜아미드(N-cyclohexyl-2-benzothiazole sulfenamide, CZ) 또는 티아졸(Thiazole), 설펜아미드 (sulfenamide)와 병행 사용시 효과가 큰 촉진제인 N,N-디페닐 구아니딘(N,N-Diphenyl guanidine, DPG)을 사용할 수 있는데 트레드 고무의 내구력, 내마모성 및 내열성능을 향상을 위해 바람직하기로는 가황촉진제중 NS와 DPG를 3:1∼5:1의 비율로 사용하는 것이 좋다.In the vulcanization accelerator used in the present invention, the vulcanization accelerator (1) is a sustained-release semi-promoter of natural rubber or diene rubber, which maintains high modulus and is advantageous in rubber compounding (Nt-butyl- benzothiazole-sulfenamide (NS) may be used, and the vulcanization accelerator (2) may be N-cyclohexyl-2-benzothiazole sulfenamide (CZ) or thiazole, sulfenamide. (N, N-Diphenyl guanidine, DPG), which is an effective accelerator when used in combination with (sulfenamide), can be used, but it is preferably a vulcanization accelerator to improve the durability, abrasion resistance and heat resistance of the tread rubber. It is recommended that NS and DPG be used in a ratio of 3: 1 to 5: 1.

이하 본 발명을 다음의 비교예, 실시예 및 시험예에 의하여 설명하고자 한다. 그러나 이들이 본 발명의 기술적 범위를 한정하는 것은 아니다.Hereinafter, the present invention will be described by the following comparative examples, examples and test examples. However, these do not limit the technical scope of the present invention.

<비교예>Comparative Example

하기의 표 1과 같이 천연고무 60 중량부, 폴리부타디엔 고무 40 중량부 혼합된 원료고무 100 중량부에 대하여 통상적으로 고무조성물의 첨가제로 사용하는 카본블랙 57 중량부, 프로세스 오일(Aromatic#2, 미창석유 제품) 2 중량부, 스테아린 산 1.5 중량부, 아연화 4 중량부, 노화방지제 4.5 중량부, 유황 2.2 중량부 및 가황촉진제(1) NS 0.9 중량부 첨가하여 145℃에서 30∼40분 동안 가류하여 트레드 고무시편을 제조하였다.60 parts by weight of natural rubber, 40 parts by weight of polybutadiene rubber, 57 parts by weight of carbon black typically used as an additive of a rubber composition, process oil (Aromatic # 2, unchanged), as shown in Table 1 below. Petroleum products) 2 parts by weight, stearic acid 1.5 parts by weight, zincated 4 parts by weight, anti-aging agent 4.5 parts by weight, sulfur 2.2 parts by weight and vulcanization accelerator (1) NS by weight is added and vulcanized at 145 ℃ for 30-40 minutes Tread rubber specimens were prepared.

<실시예 1><Example 1>

하기의 표 1과 같이 천연고무 60 중량부, 폴리부타디엔 고무 20 중량부, 폴리부타디엔 고무 20 중량부 혼합된 원료고무 100 중량부에 대하여 통상적으로 고무조성물의 첨가제로 사용하는 카본블랙 57 중량부, 프로세스 오일(Aromatic#2, 미창석유 제품) 2 중량부, 스테아린 산 1.5 중량부, 아연화 4 중량부, 노화방지제 4.5 중량부, 유황 1.4 중량부 및 가황촉진제(1)로 NS(입수처 : Flexsys사) 0.9 중량부, 가황촉진제(2)로 DPG(입수처 : 금호몬산토) 0.3 중량부를 첨가하여 145℃에서 30∼40분 동안 가류하여 트레드 고무시편을 제조하였다.60 parts by weight of natural rubber, 20 parts by weight of polybutadiene rubber, 20 parts by weight of polybutadiene rubber, and 57 parts by weight of carbon black, which is typically used as an additive of a rubber composition, based on 100 parts by weight of mixed raw rubber, as shown in Table 1 below. 2 parts by weight of oil (Aromatic # 2, unchanged petroleum products), 1.5 parts by weight of stearic acid, 4 parts by weight of zinc, 4 parts by weight of anti-aging agent, 1.4 parts by weight of sulfur, and NS as vulcanization accelerator (1) (obtained from Flexsys) 0.9 parts by weight, 0.3 parts by weight of DPG (obtained from Kumho Monsanto) was added as a vulcanization accelerator (2), and vulcanized at 145 ° C. for 30 to 40 minutes to prepare a tread rubber specimen.

<실시예 2><Example 2>

가황촉진제(1)로 NS 1.2 중량부, 가황촉진제(2)로 DPG 0.3 중량부 사용하는 것을 제외하고는 상기 실시예 1과 동일하게하여 고무시편을 제조하였다.A rubber specimen was prepared in the same manner as in Example 1 except that 1.2 parts by weight of NS was used as a vulcanization accelerator (1) and 0.3 parts by weight of DPG as a vulcanization accelerator (2).

<실시예 3><Example 3>

가황촉진제(1)로 NS 1.5 중량부, 가황촉진제(2)로 DPG 0.3 중량부 사용하는 것을 제외하고는 상기 실시예 1과 동일하게하여 고무시편을 제조하였다.A rubber specimen was prepared in the same manner as in Example 1 except that NS 1.5 parts by weight of the vulcanization accelerator (1) and 0.3 parts by weight of DPG were used as the vulcanization accelerator (2).

표 1. 비교예 및 실시예의 고무조성물Table 1. Rubber Compositions of Comparative Examples and Examples

항 목Item 비교예Comparative example 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 천연고무Natural rubber 6060 6060 6060 6060 폴리부타디엔 고무Polybutadiene rubber 4040 2020 2020 2020 폴리스타이엔부타디엔 고무Polystyrene Butadiene Rubber -- 2020 2020 2020 카본블랙Carbon black 5757 5757 5757 5757 프로세스오일Process oil 22 22 22 22 스테아린산Stearic acid 1.51.5 1.51.5 1.51.5 1.51.5 아연화Zincification 44 44 44 44 노화방지제Anti-aging 4.54.5 1.51.5 4.54.5 4.54.5 유황brimstone 2.22.2 1.41.4 1.41.4 1.41.4 가황촉진제(1) NSVulcanization Accelerator (1) NS 0.90.9 0.90.9 1.21.2 1.51.5 가황촉진제(2) DPGVulcanization Accelerator (2) DPG -- 0.30.3 0.30.3 0.30.3

<시험예 1><Test Example 1>

상기 비교예 및 실시예로부터 제조한 고무시편을 공지의 방법으로 인장물성, 발열성능, 열화파단성능 및 마모성능에 대한 물성을 측정하고 그 결과를 아래의 표 2에 정리하여 나타내었다.The rubber specimens prepared from the comparative examples and examples were measured by known methods for physical properties of tensile properties, exothermic performance, deterioration fracture performance, and abrasion performance, and the results are summarized in Table 2 below.

한편 인장물성은 초기 고무시편의 물성과 105℃에서 24시간 동안 노화시킨 후의 물성을 측정하여 초기 대비 노화 후의 물성을 비교할 수 있었다.On the other hand, the tensile properties were compared with the properties of the initial rubber specimens and the properties after aging by measuring the physical properties after aging at 105 ℃ for 24 hours.

표 2. 비교예 및 실시예 시편의 물성측정 결과Table 2. Results of Measurement of Physical Properties of Comparative Examples and Examples

항 목Item 비교예Comparative example 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 인장물성(초기/노화)Tensile Properties (Initial / Aging) 경도(Shore A)Shore A 65/7065/70 65/7165/71 66/7166/71 68/7368/73 300% 모듈러스(kg/cm2)300% modulus (kg / cm 2 ) 104/149104/149 106/149106/149 109/150109/150 132/164132/164 인장강도(kg/cm2)Tensile Strength (kg / cm 2 ) 233/195233/195 235/198235/198 234/223234/223 244/210244/210 신율(%)% Elongation 576/391576/391 576/394576/394 556/446556/446 507/385507/385 발열성능(온도상승, ℃)Exothermic performance (temperature rise, ℃) 37.937.9 37.137.1 32.432.4 31.031.0 열화파단성능(min, @100℃)Degradation failure performance (min, @ 100 ℃) 6.06.0 6.36.3 7.67.6 6.96.9 마모성능(피코법, g)Wear performance (pico method, g) 0.01950.0195 0.02010.0201 0.01960.0196 0.02050.0205

<시험예 2><Test Example 2>

상기 비교예 및 실시예의 고무시편으로 타이어 트레드 고무를 제조한 후 이를 11R22.5 규격 타이어에 부착하고 실차시험을 하여 타이어의 내구력, 내마모성능 및 내열성능을 측정하고 그 결과를 아래의 표 3에 나타내었다.After the tire tread rubber was manufactured using the rubber specimens of the comparative examples and examples, the tire tread rubber was attached to the 11R22.5 standard tire and subjected to a real vehicle test to measure the tire durability, wear resistance, and heat resistance, and the results are shown in Table 3 below. It was.

아래의 표 3에서 내구력은 시간이 길수록, 내마모 지수는 높을수록 성능이 우수하다.In Table 3 below, the longer the durability and the higher the wear index, the better the performance.

표 3. 비교예 및 실시예 고무조성물을 적용한 타이어의 제반성능Table 3. Comparative Performance of Tires with Rubber Compositions

항 목Item 비교예Comparative example 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 내구력결과(ECER-54)*Durability Results (ECER-54) * 66시간 55분트레드벨트 파열66 hours 55 minutes 68시간 27분트레드벨트 파열68 hours 27 minutes 71시간 15분트레드벨트 파열71 hours 15 minutes 70시간 4분트레드벨트 파열70 hours 4 minutes 67시간 34분트레드벨트 파열67 hours 34 minutes 67시간 42분트레드벨트 파열67 hours 42 minutes 69시간 9분트레드벨트 파열69 hours 9 minutes 68시간 39분트레드벨트 파열68 hours 39 minutes 내마모지수(km/mm)**Abrasion Resistance Index (km / mm) ** 7,3737,373 7,4367,436 7,7037,703 7,5427,542

* ECER-54: 유럽규정의 속도 내구력 측정시험, 내구성능이 균일한지를 평가하기 위해 2개씩 평가하여 각각의 평균결과를 나타냄* ECER-54: European test for speed endurance test, two evaluations are performed to evaluate whether the durability performance is uniform and each average result is presented.

** 내마모 지수 : 11R22.5 규격의 비교예 타이어와 실시예 타이어를 동일 트럭 또는 버스에 취부하여 일정거리를 주행한 후 트레드 고무 1mm가 마모되는 동안 주행한 거리를 산출한 것임** Abrasion Resistance Index: The comparative example tire of the 11R22.5 standard and the example tire were mounted on the same truck or bus, and after driving for a certain distance, the distance traveled while the tread rubber 1mm was worn was calculated.

상기의 표 2 및 표 3에서처럼 천연고무, 폴리부타디엔 고무, 폴리스티렌부타디엔 고무를 원료고무로 사용하고 유황을 소량 사용하고, 이종의 가황촉진제를 고무조성물에 첨가한 본 발명의 트레드 고무조성물에 의한 트레드 고무 물성은 종래의 트레드 고무 물성에 비교하면 마모성능은 동등 수준을 유지하면서도 내열성능과 내열파단성능이 개선되어 주행중 트레드의 분리가 일어나는 것을 방지하여 사고를 감소시킬 수 있다. 한편 트레드 분리의 방지로 인해 타이어 본체의 수명도 연장시킬 수 있다.Tread rubber according to the tread rubber composition of the present invention using natural rubber, polybutadiene rubber, polystyrene butadiene rubber as a raw material rubber, using a small amount of sulfur, and adding different vulcanization accelerators to the rubber composition as shown in Tables 2 and 3 above. Compared with the conventional tread rubber properties, the physical properties can be reduced by preventing the separation of the tread during the driving by improving the heat resistance and the breaking resistance while maintaining the same level of wear performance. On the other hand, the life of the tire body can be extended by preventing tread separation.

Claims (2)

공지의 버스용 트레드 고무조성물에 있어서, 천연고무 50∼60 중량부, 폴리부타디엔 고무 20∼25 중량부, 폴리스티렌부타디엔고무 20∼25 중량부 혼합물의 원료고무 100 중량부에 대하여 유황 1.0∼2.0 중량부, 가황촉진제(1)을 0.5∼2.0 중량부, 가황촉진제(2)를 0.1∼0.5 중량부 포함하는 것을 특징으로 하는 버스용 타이어 트레드 고무조성물In known bus tread rubber compositions, 50 to 60 parts by weight of natural rubber, 20 to 25 parts by weight of polybutadiene rubber, and 20 to 25 parts by weight of polystyrene butadiene rubber, 1.0 to 2.0 parts by weight of sulfur, based on 100 parts by weight of the raw material rubber of the mixture. , Tire tread rubber composition comprising 0.5 to 2.0 parts by weight of vulcanization accelerator (1) and 0.1 to 0.5 parts by weight of vulcanization accelerator (2) 1항에 있어서, 가황촉진제(1)은 N-t-부틸-벤조티아졸-설펜아미드(NS) 이고, 가황촉진제(2)는 N-시클로헥실-2-벤조티아졸설펜아미드(CZ) 또는 N,N-디페닐 구아니딘(DPG)임을 특징으로 하는 버스용 타이어 트레드 고무조성물The vulcanization accelerator (1) according to claim 1, wherein the vulcanization accelerator (1) is Nt-butyl-benzothiazole-sulfenamide (NS), and the vulcanization accelerator (2) is N-cyclohexyl-2-benzothiazolesulfenamide (CZ) or N, Tire tread rubber composition for buses characterized by N-diphenyl guanidine (DPG)
KR10-2001-0055448A 2001-09-10 2001-09-10 Tire tread rubber composition for bus KR100449890B1 (en)

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KR100703848B1 (en) 2005-06-22 2007-04-06 금호타이어 주식회사 Bead filler rubber composition for truck and bus radial tires
KR100703847B1 (en) 2005-06-23 2007-04-06 금호타이어 주식회사 Bead filler rubber composition for truck and bus tire with improved blow-out property

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KR100790503B1 (en) 2006-06-07 2008-01-02 김운호 The product method and rubber to reduce abrasion
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KR100703848B1 (en) 2005-06-22 2007-04-06 금호타이어 주식회사 Bead filler rubber composition for truck and bus radial tires
KR100703847B1 (en) 2005-06-23 2007-04-06 금호타이어 주식회사 Bead filler rubber composition for truck and bus tire with improved blow-out property

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