KR100495569B1 - Silica reinforced tread compound recipes for pneumatic tire - Google Patents
Silica reinforced tread compound recipes for pneumatic tire Download PDFInfo
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- KR100495569B1 KR100495569B1 KR10-2003-0017205A KR20030017205A KR100495569B1 KR 100495569 B1 KR100495569 B1 KR 100495569B1 KR 20030017205 A KR20030017205 A KR 20030017205A KR 100495569 B1 KR100495569 B1 KR 100495569B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/2696—Mounting of devices using LEDs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/30—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces
- B60Q1/302—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating rear of vehicle, e.g. by means of reflecting surfaces mounted in the vicinity, e.g. in the middle, of a rear window
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/005—Electro-mechanical devices, e.g. switched
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/20—Multi-color single source or LED matrix, e.g. yellow blinker and red brake lamp generated by single lamp
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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/80—Light emitting diode
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- Tires In General (AREA)
Abstract
본 발명은 실리카를 보강 충진제로 사용하는 트레드 고무 조성물에 관한 것으로, 보다 상세하게는 공정 특성 및 분산성 개선을 통한 공기압 타이어의 트레드의 내 마모 특성을 향상시키고 환경 유해물질로 대두되고 있는 공정조제 중에 하나인 아로메틱 오일(Aromatic oil)을 고무 배합물에서 완전 삭제 또는 부분 대체한 트레드 고무 조성물에 관한 것이다.The present invention relates to a tread rubber composition using silica as a reinforcing filler, and more particularly, to improve the wear resistance of the tread of a pneumatic tire by improving process characteristics and dispersibility, and in a process aid that has emerged as an environmentally harmful substance. It relates to a tread rubber composition in which one aromatic oil is completely deleted or partially replaced in a rubber compound.
이에, 본 발명은 타이어의 트레드 고무조성물에 있어서, 원료고무 100중량부부와 실리카 30 ~ 80중량부에 대해 말레익 언하이드라이드 폴리 부타디엔 고무가 3 ~ 30중량부 포함되며, 실리카 사용량 대비 말레익 언하이드라이드 폴리 부타디엔 고무 사용량의 비율은 8 ~ 12임을 특징으로 한다.Accordingly, the present invention, in the tread rubber composition of the tire, 3 to 30 parts by weight of maleic hydride polybutadiene rubber with respect to 100 parts by weight of the raw material rubber and 30 to 80 parts by weight of silica, the amount of The proportion of the hydride polybutadiene rubber used is characterized in that from 8 to 12.
상기와 같은 조성물로 이루어진 본 발명은 다른 성능 하락 없이 내 발열성 및 내마모성 그리고 인장특성이 크게 향상되는 효과가 발생된다.The present invention made of the composition as described above is generated an effect of greatly improving the heat resistance and wear resistance and tensile properties without other performance degradation.
Description
본 발명은 실리카를 보강 충진제로 사용하는 트레드 고무 조성물에 관한 것으로, 보다 상세하게는 공정 특성 및 분산성 개선을 통한 공기압 타이어의 트레드의 내 마모 특성을 향상시키고 환경 유해물질로 대두되고 있는 공정조제 중 아로메틱 오일(Aromatic oil)을 고무 배합물에서 완전 삭제 또는 소량 사용하는 트레드 고무 조성물에 관한 것이다.The present invention relates to a tread rubber composition using silica as a reinforcing filler, and more particularly, to improve the abrasion resistance of treads of pneumatic tires through improved process properties and dispersibility, and among the process aids that are emerging as environmentally harmful substances. A tread rubber composition is used which completely eliminates or uses a small amount of aromatic oil in a rubber compound.
현재 타이어 산업에서는, 실리카와 고무의 극성(polarity) 차이로 인해 친화력이 낮기 때문에 실리카 사용량을 증가시켜 사용되고 있으며, 그에 따라 고무의 점도가 급격히 상승하게 되어 초기 가류 및 공정 불안으로 인한 실리카의 분산성이 큰 문제로 대두되고 있다. In the tire industry, silica is used due to the low affinity due to the difference in polarity between rubber and rubber, and thus the amount of silica used is increased. As a result, the viscosity of the rubber increases rapidly, and the dispersibility of silica due to initial vulcanization and process instability is increased. It is a big problem.
특히 승용차용 타이어에서는 카본블랙을 단독 사용하거나 카본블랙과 실리카 를 혼용 사용하고 있으나 과량의 실리카 사용 시 수반하는 공정문제, 분산성 하락과 타이어에서의 내 마모 특성 하락으로 인한 실리카의 사용량이 원료 고무 100중량부에 대해 0~50중량부 범위로 한정되고 있다.In particular, tires for passenger cars are either carbon black alone or carbon black and silica in combination, but the amount of silica due to process problems associated with the use of excess silica, dispersibility and deterioration of wear resistance in tires is mainly due to raw rubber 100 It is limited to the range of 0-50 weight part with respect to a weight part.
최근 합성 고무의 기술 개발과 분산성이 좋은 실리카 개발에 따른 충전량이 80중량부까지 가능하게 되었으나 범용적으로 적용하기에는 한계가 있으며, 특히 타이어 요구 성능 측면에서 볼 때 가류 후 고무 화합물의 내 마모 특성의 하락 문제는 아직도 해결해야 할 과제 중의 하나이다. Recently, due to the development of synthetic rubber technology and the development of silica with good dispersibility, the filling amount is possible up to 80 parts by weight, but there is a limit to the general purpose application, especially in view of tire performance, The problem of falling is still one of the challenges to be solved.
이에, 본 발명은 원료고무 100중량부와 실리카 30~80중량부에 대해 말레익 언하이드라이드 폴리 부타디엔 고무가 3~30중량부 포함시켜 다른 물성 하락없이 실리카 사용시 문제되는 공정성 문제를 최소화하고 보강제의 분산성을 개선시키는 타이어의 트레드 고무조성물을 제공하는 데 그 목적이 있다. Therefore, the present invention includes 3 to 30 parts by weight of maleic hydride polybutadiene rubber with respect to 100 parts by weight of the raw material rubber and 30 to 80 parts by weight of silica to minimize processability problems that occur when using silica without deteriorating other physical properties of the reinforcing agent. It is an object to provide a tread rubber composition of a tire that improves dispersibility.
이에, 본 발명은 타이어의 트레드 고무조성물에 있어서, 원료고무 100중량부와 실리카 30~80중량부에 대해 말레익 언하이드라이드 폴리 부타디엔 고무가 3~30중량부 포함됨을 특징으로 한다.Accordingly, the present invention is characterized in that in the tread rubber composition of the tire, 3 to 30 parts by weight of maleic hydride polybutadiene rubber is included with respect to 100 parts by weight of the raw material rubber and 30 to 80 parts by weight of silica.
또한, 본 발명에서는 실리카 사용량 대비 말레익 언하이드라이드 폴리 부타디엔 고무 사용량의 비율을 8 ~ 12로 하는 것이 바람직하다.In addition, in the present invention, the ratio of the amount of maleic hydride polybutadiene rubber to the amount of silica is preferably 8 to 12.
상기 원료고무는 천연고무, 스티렌-부타디엔 고무(SBR)나 부타디엔 고무(BR)와 같은 합성고무, 천연고무와 합성고무의 혼합된 고무이다. The raw material rubber is a natural rubber, synthetic rubber such as styrene-butadiene rubber (SBR) or butadiene rubber (BR), mixed rubber of natural rubber and synthetic rubber.
상기 말레익 언하이드라이드 폴리 부타디엔 고무는 바람직하게는, 3 ~ 30중량부 사용된다. 말레익 언하이드라이드 폴리 부타디엔 고무를 3중량부 미만 사용시 동량의 아로마틱 오일에 비하여 개선효과가 미비하며, 30중량부 초과 사용 시 과도한 점도 하락으로 오히려 보강 충진제의 분산성을 하락시키는 결과를 초래한다.The maleic hydride polybutadiene rubber is preferably used in an amount of 3 to 30 parts by weight. When less than 3 parts by weight of maleic hydride polybutadiene rubber is used, the improvement effect is inferior to that of the same amount of aromatic oil, and when used in excess of 30 parts by weight, the viscosity of the reinforcing fillers is lowered, resulting in the dispersibility of the reinforcing filler.
상기 말레익 언하이드라이드 폴리 부타디엔 고무(Polybutadiene adducted with maleic anhydride)는 말레익 언하이드라이드(Maleic anhydride)에 폴리부타디엔 레진(Polybutadiene resin)을 첨가 반응시킨 것이며, 폴리부타디엔 레진은 수 평균 분자량(Number of molecular weight, Mn)이 2500 ~ 8500이고 1,2비닐(1,2 vinyl)이 25 ~ 50%인 것이 바람직하다.The maleic anhydride polybutadiene rubber (Polybutadiene adducted with maleic anhydride) is a polybutadiene resin (Polybutadiene resin) added to the maleic anhydride (Maleic anhydride), the polybutadiene resin is the number average molecular weight (Number of It is preferable that molecular weight (Mn) is 2500-8500 and 1,2vinyl (1,2 vinyl) is 25-50%.
상기 카본블랙은 요오드 흡착가가 60 ~ 150 mg/g, DBP 흡유가가 80 ~ 150cm3/100g인 것이 바람직하다.The carbon black preferably has an iodine adsorption value of 60 ~ 150 mg / g, DBP oil absorption is 80 ~ 150cm 3 / 100g.
상기 실리카는 BET(표면적 측정방법)가 100 ~ 180m2/g, DBP가 150 ~ 250cm3/100g, 평균 흡착 면적(Aggergate mean are)이 배합전 8500 nm2, 배합후 7000 ~ 8400nm2으로, 30중량부 이내 사용됨이 바람직하다.The silica is 100 ~ 180m BET (specific surface area measurement method) 2 / g, DBP is 150 ~ 250cm 3 / 100g, an average adsorbing surface area (Aggergate mean are) the formulation before 8500 nm 2, and then blended with 7000 ~ 8400nm 2, 30 It is preferably used within parts by weight.
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 1에 지시된 배합비와 같이 본 발명은 원료고무(SBR1500) 100중량부에 대하여 실리카 30중량부, 카본블랙(N-351) 50중량부, 실란커플링제(Si-69) 2.4중량부, 아로마틱 오일 7중량부, 촉진제(CZ) 1.0중량부, 황 1.8중량부, DPG 0.5중량부, 아연화 3중량부, 스테아린산 1중량부, 노방제(RD/6C/Wax) 각각 2중량부 포함하여 이루어지며 이를 혼합한 후 밴버리믹서를 사용하여 트레드 고무시편을 제조하였다.As the compounding ratio indicated in Table 1, the present invention is based on 100 parts by weight of the raw material rubber (SBR1500) 30 parts by weight of silica, 50 parts by weight of carbon black (N-351), 2.4 parts by weight of silane coupling agent (Si-69), 7 parts by weight of aromatic oil, 1.0 part by weight of accelerator (CZ), 1.8 parts by weight of sulfur, 0.5 parts by weight of DPG, 3 parts by weight of zinc, 1 part by weight of stearic acid, and 2 parts by weight of a defoaming agent (RD / 6C / Wax). After mixing them, a tread rubber specimen was prepared using a Banbury mixer.
(비교예 2)(Comparative Example 2)
실리카 50중량부, 카본블랙(N-351) 30중량부, Si-69 4중량부를 사용하는 것을 제외하고는 상기 비교예 1과 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.A rubber specimen was prepared using the same composition, composition, and method as in Comparative Example 1 except that 50 parts by weight of silica, 30 parts by weight of carbon black (N-351), and 4 parts by weight of Si-69 were used.
(비교예 3)(Comparative Example 3)
실리카 70중량부, 카본블랙(N-351) 20중량부, Si-69 6.4중량부를 사용하는 것을 제외하고는 상기 비교예 1과 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.A rubber specimen was prepared using the same composition, composition ratio, and method as in Comparative Example 1 except that 70 parts by weight of silica, 20 parts by weight of carbon black (N-351), and 6.4 parts by weight of Si-69 were used.
(실시예 1)(Example 1)
실리카 50중량부, 카본블랙(N-351) 30중량부, Si-69 4중량부, 아로마틱 오일 2중량부를 사용하며, 추가로 말레익 언하이드라이드 폴리 부타디엔 고무(상품명 : RICONE 130MA20) 5중량부를 사용하는 것을 제외하고는 상기 비교예 1과 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.50 parts by weight of silica, 30 parts by weight of carbon black (N-351), 4 parts by weight of Si-69, 2 parts by weight of aromatic oil, and 5 parts by weight of maleic hydride polybutadiene rubber (trade name: RICONE 130MA20) Except that the rubber specimen was prepared using the same composition, composition ratio and method as in Comparative Example 1.
(실시예 2)(Example 2)
실리카 70중량부, 카본블랙(N-351) 20중량부, Si-69 6.4중량부, 아로마틱 오일 0중량부를 사용하며, 추가로 말레익 언하이드라이드 폴리 부타디엔 고무 7중량부를 사용하는 것을 제외하고는 상기 비교예 1과 같은 조성물, 조성비 및 방법을 이용하여 고무시편을 제조하였다.70 parts by weight of silica, 20 parts by weight of carbon black (N-351), 6.4 parts by weight of Si-69, and 0 parts by weight of aromatic oil are used, except that 7 parts by weight of maleic hydride polybutadiene rubber is used. A rubber specimen was prepared using the same composition, composition ratio, and method as in Comparative Example 1.
표 1. 실시예 및 비교예의 트레드 고무조성물 Table 1. Tread Rubber Compositions of Examples and Comparative Examples
<시험예><Test Example>
비교예 1~3과 실시예 1~2의 고무시편을 ASTM 관련규정에 의하여 물성을 측정하였으며 그 결과는 다음 표 2에 나타난 바와 같다.The rubber specimens of Comparative Examples 1 to 3 and Examples 1 to 2 were measured by ASTM-related regulations, and the results are shown in Table 2 below.
<시험방법><Test method>
1)내 발열성(Heat Build - Up) 1) Heat build-up
페리 기계사의 히스테리시스 시험기(hystetsis testing machine)를 이용하여 일정한 스트로크를 시편에 부여하여 상승된 온도를 측정하는 방법으로 수치가 적을수록 내발열 특성이 우수함을 나타낸다. 또는 최초의 시편온도와 시편의 최종온도와의 온도차가 적거나 을수록 성능이 우수함을 나타낸다.Using a Perry machine's hysteresis testing machine (hystetsis testing machine) to give a certain stroke to the specimen to measure the elevated temperature, the smaller the value indicates that the excellent heat resistance characteristics. Alternatively, the smaller or smaller the temperature difference between the original specimen temperature and the final specimen temperature indicates better performance.
2)무니점성도(Viscosity) 2) Mooney Viscosity
ASTM(미국재료시험)에 의해서 결정된 회전식 점성도계의 일종인 무니점성도계에 의해서 측정된다. 무니점성도의 값은 고무의 분자량과 일정한 관계가 있으며, 또한 배합고무의 무니점성도는 스코치 속도 및 가황(加黃) 고무의 강도와 밀접한 관계가 있다. 이 때문에 무니점성도는 실제로 고무의 가황공정 조작의 플랜트 관리 등에 자주 쓰이는 값이다. 무니점성도계는 다른 조건이 일정하므로 온도만을 상승시켜서 가소도, 즉 점성도의 변화를 간편하게 측정할 수 있으므로, 가황에 필요한 시간, 즉 가황시간을 예상할 수 있다. It is measured by a Mooney viscometer, a type of rotary viscometer determined by ASTM (American Materials Test). The Mooney Viscosity value has a constant relationship with the molecular weight of the rubber, and the Mooney Viscosity of the compounded rubber is closely related to the scorch speed and the strength of the vulcanized rubber. For this reason, the Mooney viscosity is actually a value frequently used for plant management of the vulcanization process operation of rubber. Since the Mooney viscometer has a different condition, the plasticity, that is, the change in viscosity, can be easily measured by only raising the temperature, so that the time required for vulcanization, that is, vulcanization time, can be estimated.
3)내마모성3) wear resistance
PICO 시험기기를 이용하여 내 마모정도를 평가한 것으로 80회 회전후 손실된 분량을 나타낸 것으로, 수치가 적을수록 성능이 우수함을 나타낸다.The wear resistance was evaluated using the PICO test equipment, and the amount lost after 80 revolutions was shown. The smaller the value, the better the performance.
4)tanδ(60℃)4) tanδ (60 ℃)
타이어의 성능 중 저연비 특성을 예측할 수 있는 값으로 Elastomerics(model 1332)기기를 이용하여 측정하며, 수치가 적을수록 성능이 우수함을 나타낸다. (주파수 : 11kHz, mean level : 10%, 진폭 : 5%)It is a value that can predict the low fuel consumption characteristics of the tire performance by using Elastomerics (model 1332) device, the smaller the value indicates the better performance. (Frequency: 11 kHz, mean level: 10%, amplitude: 5%)
표2. 비교예 1~3 및 실시예 1~2의 물성측정결과Table 2. Physical property measurement results of Comparative Examples 1 to 3 and Examples 1 to 2
상기 표 2는 원료고무 100중량부에 대하여 아로마틱 오일을 다량 사용한 비교예 1 ~ 3과, 아로마틱 오일을 소량 사용하면서 말레익 언하이드라이드 폴리 부타다엔 고무를 소량 함유한 실시예 1및 말레익 언하이드라이드 폴리 부타다엔 고무를 다량 함유한 실시예 2에 대해 물성을 측정한 결과이다.Table 2 shows Comparative Examples 1 to 3 using a large amount of aromatic oil with respect to 100 parts by weight of the raw material rubber, Example 1 and a small amount of maleic hydride polybutadiene rubber while using a small amount of aromatic oil. It is the result of having measured the physical property about Example 2 containing a large amount of hydride poly butadiene rubber.
첫째, 발열성능은 본 발명 실시예 1~2가 종래 발명 비교예 1~3보다 월등히 향상되었음을 알 수 있다.First, the exothermic performance can be seen that Examples 1 to 2 of the present invention is significantly improved than the Comparative Examples 1 to 3 of the conventional invention.
둘째, 내 마모성능은 본 발명 실시예가 종래 발명 비교예보다 대체적으로 향상되었음을 알 수 있다.Second, the wear resistance can be seen that the embodiment of the present invention is generally improved than the conventional comparative example.
셋째, 본 발명 실시예 2가 종래 발명 비교예 3보다 점도 감소율이 현저히 줄어들었으며, 인장특성 및 내마모 성능 그리고 저연비특성이 우수함을 알 수 있다.Third, the viscosity reduction rate of Example 2 of the present invention is significantly reduced than that of Comparative Example 3 of the prior art, and it can be seen that the tensile property, the wear resistance, and the low fuel efficiency are excellent.
넷째, 비교예 1~3와 같이, 실리카 70중량부 사용시 높은 점도로 인한 조기 가류가 큰 문제점으로 대두되고 있는데, 본 발명 실시예 1~2에 나타난 바와 같이 조기 가류시간이 길어지면서 가류시간은 큰 영향을 받지 않음을 알 수 있다.Fourth, as in Comparative Examples 1 to 3, early vulcanization due to high viscosity when using 70 parts by weight of silica has emerged as a big problem, as shown in Examples 1 to 2 of the present invention, as the vulcanization time is long, It can be seen that it is not affected.
상기 실험 및 시험결과에는 나타나지 않았지만 원료고무 100중량부에 대해 Ricone 130MA20 3중량부 이하와 30중량부 이상을 각각 포함시켜 완제품 타이어를 만들어 시험한 결과, Ricone 130MA20 3중량부 미만인 사용한 경우에는 동량의 아로마틱 오일에 비하여 개선효과가 미비하며, Ricone 130MA20 30중량부 초과 사용 시 과도한 점도 하락으로 오히려 보강 충진제의 분산성이 하락되는 결과가 초래되었다.Although not shown in the above experiments and test results, the finished tires were tested by including 3 parts by weight of Ricone 130MA20 or less and 30 parts by weight or more based on 100 parts by weight of the raw material rubber. The improvement effect is inferior to that of oil, and excessive dispersion of viscosity when used in excess of 30 parts by weight of Ricone 130MA20 resulted in a decrease in dispersibility of the reinforcing filler.
이에, 본 고안은 타이어의 트레드 고무조성물에 있어서, 원료고무 100중량부와 실리카 30~80중량부에 대해 말레익 언하이드라이드 폴리 부타디엔 고무가 3~30중량부가 포함되며 아로마틱 오일의 사용을 최소화함으로써 다른 성능 하락 없이 친환경적이며 내 발열성 및 내마모성 그리고 인장특성이 크게 향상되는 효과가 발생된다.In this regard, the present invention includes 3 to 30 parts by weight of maleic hydride polybutadiene rubber with respect to 100 parts by weight of raw material rubber and 30 to 80 parts by weight of silica in the tread rubber composition of the tire, thereby minimizing the use of aromatic oils. It is eco-friendly without any deterioration of performance and greatly improves heat resistance, abrasion resistance and tensile properties.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09328579A (en) * | 1996-06-12 | 1997-12-22 | Yokohama Rubber Co Ltd:The | Rubber composition for tire tread |
| KR0174797B1 (en) * | 1996-04-04 | 1999-04-01 | 홍건희 | Tread Rubber Composition for Large Tires |
| JP2000239443A (en) * | 1999-02-24 | 2000-09-05 | Toyo Tire & Rubber Co Ltd | Rubber composition for tire tread |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0174797B1 (en) * | 1996-04-04 | 1999-04-01 | 홍건희 | Tread Rubber Composition for Large Tires |
| JPH09328579A (en) * | 1996-06-12 | 1997-12-22 | Yokohama Rubber Co Ltd:The | Rubber composition for tire tread |
| JP2000239443A (en) * | 1999-02-24 | 2000-09-05 | Toyo Tire & Rubber Co Ltd | Rubber composition for tire tread |
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