JPH09227720A - Rubber composition - Google Patents
Rubber compositionInfo
- Publication number
- JPH09227720A JPH09227720A JP8265763A JP26576396A JPH09227720A JP H09227720 A JPH09227720 A JP H09227720A JP 8265763 A JP8265763 A JP 8265763A JP 26576396 A JP26576396 A JP 26576396A JP H09227720 A JPH09227720 A JP H09227720A
- Authority
- JP
- Japan
- Prior art keywords
- rubber composition
- rubber
- tread
- carbon black
- dyn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
Description
【0001】本発明は、ゴム組成物に関し、特に、トレ
ッド部が2層構造である場合のベース部に適用されるゴ
ム組成物に関する。The present invention relates to a rubber composition, and more particularly to a rubber composition applied to a base portion when the tread portion has a two-layer structure.
【0002】[0002]
【従来の技術】タイヤの転がり抵抗を低減するには、配
合ゴムのエネルギー損失を小さくすれば良いことが知ら
れている。そこで、従来は、使用するカーボンブラック
の粒子径を大きくしたり、カーボンブラックの配合量を
減ずる等の手法が採られてきた。2. Description of the Related Art It is known that in order to reduce the rolling resistance of a tire, it is sufficient to reduce the energy loss of compounded rubber. Therefore, conventionally, techniques such as increasing the particle size of carbon black to be used and reducing the amount of carbon black compounded have been adopted.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、上記手
法では、ゴムの強度を低下させるために、更に転がり抵
抗を小さくして、現状レベル以上の低燃費化を図ること
が困難であった。また、この手法では、ゴムの動的弾性
率をも低下させるので、操縦安定性が低下し、タイヤの
運動性能に影響を与える。However, in the above method, in order to reduce the strength of rubber, it is difficult to further reduce the rolling resistance and achieve the fuel consumption higher than the current level. In addition, this method also lowers the dynamic elastic modulus of rubber, which reduces steering stability and affects the tire's dynamic performance.
【0004】そこで、本発明は、弾性率および強度を低
下させることなく、エネルギー損失を小さくし、転がり
抵抗を低減させることのできるゴム組成物の提供を目的
とする。Therefore, an object of the present invention is to provide a rubber composition which can reduce energy loss and rolling resistance without lowering elastic modulus and strength.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明は以下の構成とする。すなわち、踏面側のキ
ャップ部とベルト側のベース部との2層構造よりなるト
レッドを備える乗用車用スチールベルトラジアルタイヤ
の前記ベース部に適用されるゴム組成物であって、ジエ
ン系ゴム100重量部に対し、窒素吸着法比表面積N2
SAが35〜105m2 /gでかつジブチルテレフタレ
ート吸油量DBPが160〜210ml/100gであ
るカーボンブラックを40重量部以上配合してなり、か
つ30℃における動的弾性率(E′)が100×106
dyn/cm2 以上、60℃における損失正接(tan
δ)が0.15未満であることを特徴とする。In order to achieve the above object, the present invention has the following constitution. That is, a rubber composition applied to the base portion of a steel belt radial tire for passenger cars, which comprises a tread having a two-layer structure of a tread side cap portion and a belt side base portion, wherein 100 parts by weight of diene rubber is used. In contrast, nitrogen adsorption method specific surface area N 2
40 parts by weight or more of carbon black having SA of 35 to 105 m 2 / g and dibutyl terephthalate oil absorption DBP of 160 to 210 ml / 100 g is blended, and the dynamic elastic modulus (E ′) at 30 ° C. is 100 ×. 10 6
Loss tangent (tan at 60 ° C, dyn / cm 2 or more)
δ) is less than 0.15.
【0006】[0006]
【発明の実施の形態】以下に、本発明を詳細に説明す
る。本発明にかかるゴム成分としては、ジエン系のゴム
であれば、天然ゴム(NR)、スチレンブタジエンゴム
(SBR)、ブタジエンゴム(BR)等の各種ゴムを単
独であるいはブレンドで使用することができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. As the rubber component according to the present invention, various rubbers such as natural rubber (NR), styrene-butadiene rubber (SBR) and butadiene rubber (BR) can be used alone or in a blend as long as they are diene rubbers. .
【0007】また、本発明において使用するカーボンブ
ラックは芳香族成分の高い原料を用い、通常のオイルフ
ァーネス法による反応炉を用い、生成反応温度、反応時
間、燃焼ガス流速、チョーク部での原料油濃度等を制御
することにより製造することができる。Further, the carbon black used in the present invention uses a raw material having a high aromatic content, and a reaction furnace according to an ordinary oil furnace method is used to produce reaction temperature, reaction time, combustion gas flow rate, and feed oil in the choke section. It can be manufactured by controlling the concentration and the like.
【0008】尚、本発明のゴム組成物には、ゴム業界で
通常使用される配合剤、例えば加硫剤、加硫促進剤、加
硫促進助剤、老化防止剤、軟化剤等を必要に応じて適宜
配合することができる。The rubber composition of the present invention requires compounding agents usually used in the rubber industry, such as a vulcanizing agent, a vulcanization accelerator, a vulcanization accelerating aid, an antiaging agent and a softening agent. It can be appropriately blended.
【0009】以下に本発明の作用を説明する。カーボン
ブラックのN2 SAが35m2 /g未満では、破壊特性
が低下し、105m2 /gを超えると、低発熱性の改良
効果が得られず、また、DBPが160ml/100g
未満では、ゴムの強度の確保と転がり抵抗低減の両立が
図れず、210ml/100gを超えるとゴム組成物の
配向性により、破壊強度が低下する。また、カーボンブ
ラックの配合量が40重量部未満の場合、弾性率の向上
の効果が得られず、また、更なる転がり抵抗の低減効果
を得るためには、65重量部以下が好ましい。更に、本
発明のゴム組成物のE′が100×106 dyn/cm
2 未満では、タイヤの運動性能向上効果が得られず、ま
た、更なる運動性能向上効果を得るためには、140×
106 dyn/cm2 以上が好ましい。また、60℃に
おける損失正接(tanδ)が0.15以上では、転が
り抵抗の低減効果が期待できず、また、更なる転がり抵
抗の低減効果を得るためには、0.11未満が好まし
い。The operation of the present invention will be described below. If the N 2 SA of carbon black is less than 35 m 2 / g, the fracture characteristics will deteriorate, and if it exceeds 105 m 2 / g, the effect of improving the low heat buildup will not be obtained, and DBP will be 160 ml / 100 g
If it is less than 210 ml, it is not possible to secure both the strength of the rubber and the reduction of rolling resistance, and if it exceeds 210 ml / 100 g, the breaking strength is lowered due to the orientation of the rubber composition. When the amount of carbon black is less than 40 parts by weight, the effect of improving the elastic modulus cannot be obtained, and in order to obtain the further effect of reducing the rolling resistance, it is preferably 65 parts by weight or less. Further, E ′ of the rubber composition of the present invention is 100 × 10 6 dyn / cm.
If it is less than 2 , the effect of improving athletic performance of the tire cannot be obtained, and in order to further improve the athletic performance, 140 ×
It is preferably 10 6 dyn / cm 2 or more. Further, if the loss tangent (tan δ) at 60 ° C. is 0.15 or more, the rolling resistance reducing effect cannot be expected, and in order to obtain the further rolling resistance reducing effect, less than 0.11 is preferable.
【0010】[0010]
【実施例】以下に、本発明を各実施例および各比較例に
基づいて説明する。表1記載の配合に従い、加硫ゴムお
よび試作タイヤを作製し、以下の測定方法により、各特
性を求めた。尚、タイヤサイズは185/70R14
で、表1記載の配合はベーストレッドゴムにのみ適用
し、キャップトレッドゴムは各例共通で、E′(30
℃)が140×106 dyn/cm2 、tanδ(60
℃)が0.28、またトレッド全体に対するベースゴム
の容積は15%とした。N2 SA ASTM D3037に準拠した。DBP ASTM D2414に準拠した。E′およびtanδ 初期歪10%、振動数60Hz、動歪1%であり、温度
はそれぞれ30℃および60℃の条件にて、東洋精器製
スペクトロメーターを用いて測定した。転がり抵抗 転がり抵抗指数は、外径1.7mのドラム上にタイヤを
接触させてドラムを回転させ、一定速度まで上昇後、ド
ラムを惰行させて、所定速度での慣性モーメントから算
出した値から下式によって評価した。比較例5をコント
ロールとした。数値が小さい程転がり抵抗が小さいこと
を示す。 (テストタイヤの慣性モーメント/コントロールタイヤ
の慣性モーメント)×100乾燥路における運動性能 ドイツ製高性能乗用車を用い、乾燥サーキットにて実車
走行を行い、ラップタイム、高速走行時のフィーリング
(駆動、制動性、ハンドル応答性、操舵時の路面グリッ
プ特性、スリップ限界を超えてからのコントロール性)
を総合評価して、運動性能の評価とした。同じく比較例
5をコントロールとした。数値が大きい程運動性能が良
好であることを示す。EXAMPLES The present invention will be described below based on Examples and Comparative Examples. Vulcanized rubbers and trial tires were prepared according to the formulations shown in Table 1, and the respective properties were determined by the following measurement methods. The tire size is 185 / 70R14
The composition shown in Table 1 is applied only to the base tread rubber, and the cap tread rubber is common to all the examples.
℃) 140 × 10 6 dyn / cm 2 , tan δ (60
C.) was 0.28, and the volume of the base rubber was 15% with respect to the entire tread. According to N 2 SA ASTM D3037. According to DBP ASTM D2414. E ′ and tan δ had an initial strain of 10%, a frequency of 60 Hz, and a dynamic strain of 1%, and the temperature was measured at 30 ° C. and 60 ° C. using a Toyo Seiki spectrometer. Rolling resistance The rolling resistance index is lower than the value calculated from the moment of inertia at a predetermined speed by contacting the tire on a drum with an outer diameter of 1.7 m, rotating the drum, increasing the speed to a certain speed, and coasting the drum. Evaluated by the formula. Comparative Example 5 was used as a control. The smaller the value, the smaller the rolling resistance. (Moment of inertia of test tire / moment of inertia of control tire) × 100 Dynamic performance on dry road A high- performance German-made passenger car was used to run on a dry circuit, and the lap time and feeling at high speed (driving, braking performance) , Steering response, road surface grip characteristics during steering, controllability after exceeding slip limit)
Was comprehensively evaluated and evaluated as the exercise performance. Similarly, Comparative Example 5 was used as a control. The larger the value, the better the exercise performance.
【0011】[0011]
【表1】 [Table 1]
【0012】以上より、実施例1〜7はいずれも転がり
抵抗とタイヤ運動性能の両立が可能となった。As described above, in each of Examples 1 to 7, it was possible to achieve both rolling resistance and tire motion performance.
【0013】[0013]
【発明の効果】本発明によると、転がり抵抗を低減し
て、低燃費化を図りつつ、タイヤ運動性能を向上させる
ことができるという効果が得られる。According to the present invention, rolling resistance can be reduced, fuel consumption can be reduced, and tire dynamic performance can be improved.
Claims (1)
部との2層構造よりなるトレッドを備える乗用車用スチ
ールベルトラジアルタイヤの前記ベース部に適用される
ゴム組成物であって、 ジエン系ゴム100重量部に対し、窒素吸着法比表面積
N2 SAが35〜105m2 /gでかつジブチルテレフ
タレート吸油量DBPが160〜210ml/100g
であるカーボンブラックを40重量部以上配合してな
り、かつ30℃における動的弾性率(E′)が100×
106 dyn/cm2 以上、60℃における損失正接
(tanδ)が0.15未満であることを特徴とするゴ
ム組成物。1. A rubber composition applied to the base portion of a steel belt radial tire for passenger cars, which comprises a tread having a two-layer structure of a tread side cap portion and a belt side base portion, wherein the diene rubber is used. With respect to 100 parts by weight, the nitrogen adsorption specific surface area N 2 SA is 35 to 105 m 2 / g and the dibutyl terephthalate oil absorption DBP is 160 to 210 ml / 100 g.
40 parts by weight or more of carbon black, which has a dynamic elastic modulus (E ′) at 30 ° C. of 100 ×
A rubber composition having a loss tangent (tan δ) of less than 0.15 at 10 6 dyn / cm 2 and 60 ° C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26576396A JP3540519B2 (en) | 1995-12-21 | 1996-10-07 | Rubber composition |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33339295 | 1995-12-21 | ||
JP7-333392 | 1995-12-21 | ||
JP26576396A JP3540519B2 (en) | 1995-12-21 | 1996-10-07 | Rubber composition |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09227720A true JPH09227720A (en) | 1997-09-02 |
JP3540519B2 JP3540519B2 (en) | 2004-07-07 |
Family
ID=26547130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26576396A Expired - Fee Related JP3540519B2 (en) | 1995-12-21 | 1996-10-07 | Rubber composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3540519B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008050709A1 (en) | 2007-10-18 | 2009-05-28 | Toyo Tire & Rubber Co., Ltd., Osaka-shi | tire |
US7919558B2 (en) | 2004-02-27 | 2011-04-05 | The Yokohama Rubber Co., Ltd. | Rubber composition and pneumatic tire using the same |
WO2015182153A1 (en) * | 2014-05-30 | 2015-12-03 | 株式会社ブリヂストン | Pneumatic radial tire for use on passenger vehicle |
WO2016056168A1 (en) * | 2014-10-08 | 2016-04-14 | 株式会社ブリヂストン | Pneumatic radial tire for passenger vehicle |
JP2016074408A (en) * | 2015-06-18 | 2016-05-12 | 株式会社ブリヂストン | Pneumatic tire for vehicle |
DE102008050965B4 (en) * | 2007-10-18 | 2018-05-09 | Toyo Tire & Rubber Co., Ltd. | tire |
JP2020059408A (en) * | 2018-10-10 | 2020-04-16 | 株式会社ブリヂストン | tire |
-
1996
- 1996-10-07 JP JP26576396A patent/JP3540519B2/en not_active Expired - Fee Related
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7919558B2 (en) | 2004-02-27 | 2011-04-05 | The Yokohama Rubber Co., Ltd. | Rubber composition and pneumatic tire using the same |
DE102008050709A1 (en) | 2007-10-18 | 2009-05-28 | Toyo Tire & Rubber Co., Ltd., Osaka-shi | tire |
DE102008050965B4 (en) * | 2007-10-18 | 2018-05-09 | Toyo Tire & Rubber Co., Ltd. | tire |
DE102008050709B4 (en) | 2007-10-18 | 2018-05-09 | Toyo Tire & Rubber Co., Ltd. | tire |
WO2015182153A1 (en) * | 2014-05-30 | 2015-12-03 | 株式会社ブリヂストン | Pneumatic radial tire for use on passenger vehicle |
JPWO2015182153A1 (en) * | 2014-05-30 | 2017-04-20 | 株式会社ブリヂストン | Pneumatic radial tire for passenger cars |
WO2016056168A1 (en) * | 2014-10-08 | 2016-04-14 | 株式会社ブリヂストン | Pneumatic radial tire for passenger vehicle |
CN107074036A (en) * | 2014-10-08 | 2017-08-18 | 株式会社普利司通 | Pneumatic radial tire for car |
EP3205515A4 (en) * | 2014-10-08 | 2017-10-11 | Bridgestone Corporation | Pneumatic radial tire for passenger vehicle |
US10486473B2 (en) | 2014-10-08 | 2019-11-26 | Bridgestone Corporation | Passenger vehicle pneumatic radial tire |
JP2016074408A (en) * | 2015-06-18 | 2016-05-12 | 株式会社ブリヂストン | Pneumatic tire for vehicle |
JP2020059408A (en) * | 2018-10-10 | 2020-04-16 | 株式会社ブリヂストン | tire |
Also Published As
Publication number | Publication date |
---|---|
JP3540519B2 (en) | 2004-07-07 |
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