JPH08176348A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH08176348A JPH08176348A JP6325719A JP32571994A JPH08176348A JP H08176348 A JPH08176348 A JP H08176348A JP 6325719 A JP6325719 A JP 6325719A JP 32571994 A JP32571994 A JP 32571994A JP H08176348 A JPH08176348 A JP H08176348A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- glass transition
- transition temperature
- pneumatic tire
- weight
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気入りタイヤに関し、
更に詳しくは高性能空気入りタイヤのキャップトレッド
部を特定のゴム組成物で構成した、ウェット及びドライ
操縦性能に優れかつ耐摩耗性、低燃費性、冬期性能及び
耐経時変化性などに優れた空気入りタイヤに関する。FIELD OF THE INVENTION The present invention relates to a pneumatic tire,
More specifically, a high performance pneumatic tire with a cap tread made of a specific rubber composition, which has excellent wet and dry steering performance and is excellent in wear resistance, low fuel consumption, winter performance and aging resistance. Containing tires.
【０００２】[0002]
【従来の技術】空気入りタイヤのトレッド部は一般に外
層側のキャップトレッドと内層側のアンダートレッド部
とから構成されている。かかる空気入りタイヤは各種性
能が要求されているが、特にウェット及びドライ操縦安
定性能と耐摩耗性、低燃費性及び冬期性能などの性能が
要求されている。かかる観点から多くの提案がなされて
いる。例えば、特開平１−１６４６０２号公報には、ゴ
ム１００重量部に窒素比表面積（Ｎ2 ＳＡ）１４０〜１
６０m2／ｇ、ＤＢＰ吸油量１２０ml／１００ｇ以上、Δ
ＤＢＰ ３０ml／１００ｇ以上及びΔＤｓｔ ５０ｍμ
以下のカーボンブラック５０〜１５０重量部を配合した
組成物をタイヤトレッドに用いて操縦安定性を向上させ
ることが提案されているが、この配合には耐摩耗性、低
燃費性及び冬期性能が十分でないという問題がある。更
に特開平１−３１５４３９号公報には、ＳＢＲとその他
のジエン系ゴム１００重量部にＮ2 ＳＡ １４０〜１６
０m2／ｇ、ＤＢＰ吸油量１２０ml／１００ｇ以上、ΔＤ
ＢＰ ３０ml／１００ｇ以上などのカーボンブラック５
０〜２００重量部を配合することが提案されているが、
これらの配合では走行時の操縦安定性等には優れるが、
低燃費性や冬期性能が十分でないという問題がある。The tread portion of a pneumatic tire is generally composed of an outer layer side cap tread and an inner layer side undertread portion. Such pneumatic tires are required to have various performances, but particularly performances such as wet and dry steering stability performance, wear resistance, low fuel consumption and winter performance are required. From this viewpoint, many proposals have been made. For example, in Japanese Unexamined Patent Publication (Kokai) No. 1-164602, 100 parts by weight of rubber have a nitrogen specific surface area (N 2 SA) of 140 to 1
60m 2 / g, DBP oil absorption 120ml / 100g or more, Δ
DBP 30ml / 100g or more and ΔDst 50mμ
It has been proposed to use a composition containing 50 to 150 parts by weight of the following carbon black in a tire tread to improve steering stability, but this composition has sufficient wear resistance, low fuel consumption and winter performance. There is a problem that is not. Further, in Japanese Patent Application Laid-Open No. 1-315439, 100 parts by weight of SBR and other diene rubbers are added to N 2 SA 140-16.
0 m 2 / g, DBP oil absorption of 120 ml / 100 g or more, ΔD
Carbon black 5 such as BP 30ml / 100g or more
Although it has been proposed to add 0 to 200 parts by weight,
With these blends, steering stability etc. during running are excellent,
There is a problem that fuel efficiency and winter performance are not sufficient.
【０００３】[0003]
【発明が解決しようとする課題】従って、本発明は、前
述した従来技術の問題点を排除してウェット及びドライ
操縦性能に優れかつ耐摩耗性、低燃費性、冬期性能及び
耐経時変化性能などに優れた空気入りタイヤを提供する
ことを目的とする。Therefore, the present invention eliminates the above-mentioned problems of the prior art and has excellent wet and dry steering performance, wear resistance, fuel economy, winter performance and aging resistance. An object of the present invention is to provide an excellent pneumatic tire.
【０００４】[0004]
【課題を解決するための手段】本発明に従えば、（１）
（ｉ）ガラス転移温度（Ｔｇ）が−３０℃より高いスチ
レン−ブタジエン共重合体ゴム２５〜５０重量％、（i
i）ガラス転移温度（Ｔｇ）が−５０℃より高く−３０
℃以下のスチレン−ブタジエン共重合体ゴム２５〜６５
重量％及び（iii)ガラス転移温度（Ｔｇ）が−５０℃以
下のジエン系ゴム５〜３０重量％からなるゴム分１００
重量部並びに（２）窒素比表面積（Ｎ2 ＳＡ）１４０m2
／ｇ以上、ＤＢＰ吸油量１００ml／１００ｇ以上、ΔＤ
ＢＰ ３０ml／１００ｇ以上及びΔＤｓｔ ５０ｍμ以
下のカーボンブラック３０〜７０重量部を含むゴム組成
物をキャップトレッド部に使用したことを特徴とする空
気入りタイヤが提供される。According to the present invention, (1)
(I) 25-50% by weight of a styrene-butadiene copolymer rubber having a glass transition temperature (Tg) higher than -30 ° C, (i
i) Glass transition temperature (Tg) is higher than -50 ° C and -30
Styrene-butadiene copolymer rubber 25 to 65 ° C or lower
100% by weight and (iii) 5 to 30% by weight of a diene rubber having a glass transition temperature (Tg) of -50 ° C or less.
Parts by weight and (2) nitrogen specific surface area (N 2 SA) 140 m 2
/ G or more, DBP oil absorption 100ml / 100g or more, ΔD
There is provided a pneumatic tire characterized by using a rubber composition containing 30 to 70 parts by weight of carbon black having a BP of 30 ml / 100 g or more and a ΔDst of 50 mμ or less in a cap tread portion.
【０００５】[0005]
【作用】以下、本発明の構成及び作用効果について詳し
く説明する。本発明に係る空気入りタイヤはその構造に
は特に限定はなく、従来から知られている任意の構造の
空気入りタイヤは勿論のこと、更には現在開発中の各種
構造の空気入りタイヤ構造とすることができる。このよ
うに本発明はキャップトレッド部を前記構成のゴム組成
物から構成した任意の空気入りタイヤを包含する。The function and effect of the present invention will be described in detail below. The structure of the pneumatic tire according to the present invention is not particularly limited, and not only a conventionally known pneumatic tire of any structure but also a pneumatic tire structure of various structures currently under development can be used. be able to. As described above, the present invention includes any pneumatic tire in which the cap tread portion is made of the rubber composition having the above-mentioned constitution.
【０００６】本発明に係る空気入りタイヤのキャップト
レッド部を構成するゴム組成物は下記３種類のガラス転
移温度（Ｔｇ）の異なるゴムのブレンドに特定のカーボ
ンブラックを配合して成る。The rubber composition constituting the cap tread portion of the pneumatic tire according to the present invention is formed by blending the following three kinds of rubbers having different glass transition temperatures (Tg) with specific carbon black.
【０００７】本発明の空気入りタイヤのキャップトレッ
ド部を構成するゴム組成物に用いられるゴム分は（ｉ）
ガラス転移温度（Ｔｇ）が−３０℃より高い、好ましく
は−２５℃以上のスチレン−ブタジエン共重合体ゴム
（ＳＢＲ）２５〜５０重量％、好ましくは３５〜４５重
量％、（ii）ガラス転移温度（Ｔｇ）が−５０℃より高
く−３０℃以下、好ましくは−４５〜−３５℃のスチレ
ン−ブタジエン共重合体ゴム（ＳＢＲ）２５〜６５重量
％、好ましくは３０〜６０重量％及び（iii)ガラス転移
温度（Ｔｇ）が−５０℃以下、好ましくは−６０℃以下
のジエン系ゴム（好ましくは天然ゴム、ポリブタジエン
ゴム、スチレン−ブタジエン共重合体、ポリイソプレン
ゴム）５〜３０重量％、好ましくは１０〜２５重量％か
ら構成される。The rubber component used in the rubber composition constituting the cap tread portion of the pneumatic tire of the present invention is (i)
Styrene-butadiene copolymer rubber (SBR) having a glass transition temperature (Tg) higher than -30 ° C, preferably -25 ° C or higher, 25 to 50% by weight, preferably 35 to 45% by weight, (ii) glass transition temperature Styrene-butadiene copolymer rubber (SBR) having a (Tg) higher than −50 ° C. and lower than −30 ° C., preferably −45 to −35 ° C., 25 to 65% by weight, preferably 30 to 60% by weight and (iii) Glass transition temperature (Tg) of -50 ° C or lower, preferably -60 ° C or lower, diene rubber (preferably natural rubber, polybutadiene rubber, styrene-butadiene copolymer, polyisoprene rubber) 5 to 30% by weight, preferably It is composed of 10 to 25% by weight.
【０００８】本発明に用いられるＴｇが−３０℃より高
い第一のＳＢＲとＴｇが−５０℃より高く−３０℃以下
の第二のＳＢＲをブレンドすることが、タイヤのドライ
操縦安定性とウェットグリップ性能を両立させることに
寄与し、またＴｇが−５０℃以下のジエン系ゴムは耐摩
耗性や冬期性能に寄与する。Blending the first SBR having a Tg higher than −30 ° C. and the second SBR having a Tg higher than −50 ° C. and lower than −30 ° C., which is used in the present invention, has good dry steering stability of tires and wet steering. The diene rubber having a Tg of −50 ° C. or less contributes to achieving both grip performance and wear resistance and winter performance.
【０００９】本発明の空気入りタイヤのキャップトレッ
ド部を構成するゴム組成物は、更に、必須成分として、
前記した特定のカーボンブラックを含有する。The rubber composition constituting the cap tread portion of the pneumatic tire of the present invention further comprises, as an essential component,
It contains the specific carbon black described above.
【００１０】本発明に係るゴム組成物に用いられるカー
ボンブラックは、窒素比表面積（Ｎ 2 ＳＡ）１４０m2／
ｇ以上、好ましくは１４０〜１６０m2／ｇ、ＤＢＰ（ジ
ブチルフタレート）吸油量１００ml／１００ｇ以上、好
ましくは１２０ml／１００ｇ以上、ΔＤＢＰ（ＤＢＰ吸
油量−２４Ｍ４ＤＢＰ吸油量）３０ml／１００ｇ以上及
びΔＤｓｔ（遠心沈降法により測定される凝集体分布の
半値幅）５０ｍμ以下の所謂ＳＡＦカーボンブラックで
ある。本発明によれば、かかるカーボンブラックを３０
〜７０phr 、好ましくは３５〜６５phr 配合する。かか
るカーボンブラックを前記ゴムブレンドに配合したゴム
組成物をキャップトレッド部に使用することによりウェ
ットグリップやドライ操縦安定性を維持したまま、耐摩
耗性、低燃費性、冬期性能、耐経時変化性などの改良さ
れた空気入りタイヤを得ることができる。Car used in the rubber composition according to the present invention
Bonblack has a nitrogen specific surface area (N 2SA) 140m2/
g or more, preferably 140 to 160 m2/ G, DBP (the
Butylphthalate) Oil absorption 100ml / 100g or more, good
120ml / 100g or more, ΔDBP (DBP absorption
Oil amount -24M4DBP oil absorption amount) 30ml / 100g or more
And ΔDst (of the aggregate distribution measured by the centrifugal sedimentation method)
With so-called SAF carbon black with a half width of 50 mμ or less
is there. According to the present invention, such carbon black is
˜70 phr, preferably 35-65 phr. Scarecrow
Rubber compounded with carbon black
By using the composition in the cap tread part,
Wear resistance while maintaining good grip and dry steering stability
Improved wear resistance, low fuel consumption, winter performance, aging resistance, etc.
Can be obtained.
【００１１】本発明のタイヤ用ゴム組成物には前記必須
成分に加えて、硫黄、加硫促進剤、老化防止剤、充填
剤、軟化剤、可塑剤などのタイヤ用に一般に配合されて
いる各種添加剤を配合することができ、かかる配合物は
一般的な方法で加硫してタイヤトレッドを製造すること
ができる。これらの添加剤の配合量も一般的な量とする
ことができる。例えば、硫黄の配合量はゴム１００重量
部当り０．５重量部以上とするのが好ましく、１．０〜
３．０重量部とするのが更に好ましい。In the rubber composition for tires of the present invention, in addition to the above essential components, various kinds of sulfur, vulcanization accelerators, antioxidants, fillers, softeners, plasticizers and the like which are generally blended for tires are used. Additives can be blended and such blends can be vulcanized by conventional methods to produce tire treads. The compounding amount of these additives may be a general amount. For example, the compounding amount of sulfur is preferably 0.5 parts by weight or more per 100 parts by weight of rubber, and is 1.0 to
More preferably, it is 3.0 parts by weight.
【００１２】[0012]
【実施例】以下、実施例及び比較例に従って本発明を更
に詳しく説明するが、本発明の技術的範囲をこれらの実
施例に限定するものでないことは言うまでもない。実施例１〜５及び比較例１〜１２ 表Ｉに示す配合（重量部）でそれぞれの成分を配合し、
加硫促進剤と硫黄を除く原料ゴム及び配合剤を１．７リ
ットルのバンバリーミキサーで５分間混合した後、この
混合物に加硫促進剤と硫黄とを８インチの試験用練りロ
ール機で４分間混練し、ゴム組成物を得た。これらのゴ
ム組成物を１６０℃で２０分間プレス加硫して、目的と
する試験片を調製し、各種試験を行い、その物性を測定
した。得られた加硫物の物性は表Ｉに示す通りである。
このようにして得られた配合物のドライ操縦安定性は一
般的な構造の空気入りラジアルタイヤ（サイズ：１９５
／５５Ｒ１６）を取り付けたテスト車（国産のＦＦセダ
ン車）でもって後述の条件で走行した際のドライ操縦安
定性を測定して表Ｉに示した。The present invention will be described in more detail below with reference to Examples and Comparative Examples, but it goes without saying that the technical scope of the present invention is not limited to these Examples. Examples 1 to 5 and Comparative Examples 1 to 12 Each component was blended in the formulation (parts by weight) shown in Table I,
After mixing the vulcanization accelerator and the raw rubber and compounding agent excluding sulfur for 5 minutes with a 1.7 liter Banbury mixer, the mixture was mixed with the vulcanization accelerator and sulfur for 4 minutes with an 8-inch test kneading roll machine. Kneading was performed to obtain a rubber composition. These rubber compositions were press-vulcanized at 160 ° C. for 20 minutes to prepare target test pieces, various tests were conducted, and their physical properties were measured. The physical properties of the obtained vulcanizate are shown in Table I.
The dry steering stability of the compound thus obtained is determined by the pneumatic radial tire (size: 195) having a general structure.
/ 55R16) was mounted on a test vehicle (domestic FF sedan vehicle) and the dry steering stability was measured when the vehicle was driven under the conditions described below.
【００１３】表Ｉの実施例及び比較例の配合に用いた配
合剤は以下の通りである。 ＳＢＲ−１：スチレン含量＝４７％，ビニル含量＝１３
％でＴｇが−２１℃のＥ−ＳＢＲ（非油展ゴム） ＳＢＲ−２：スチレン含量＝３３％，ビニル含量＝１４
％でＴｇが−３６℃のＥ−ＳＢＲ（非油展ゴム） ＳＢＲ−３：日本ゼオン（株）製“Ｎｉｐｏｌ １５０
２”（スチレン含量＝２５％，ビニル含量＝１５％でＴ
ｇが−５２℃の非油展ＳＢＲ） ＳＢＲ−４：日本ゼオン（株）製“Ｎｉｐｏｌ ９５２
０”（スチレン含量＝３８％，ビニル含量＝１４％でＴ
ｇが−３２℃のＳＢＲ，３７．５phr 油展） ＢＲ ：日本ゼオン（株）製“Ｎｉｐｏｌ １２２
０”（Ｔｇ＝−１０１℃）The ingredients used in the formulation of the examples and comparative examples in Table I are as follows: SBR-1: Styrene content = 47%, vinyl content = 13
%, Tg of -21 ° C. E-SBR (non-oil extended rubber) SBR-2: styrene content = 33%, vinyl content = 14
% -Tg of -36 [deg.] C. E-SBR (non-oil extended rubber) SBR-3: "Nipol 150" manufactured by Nippon Zeon Co., Ltd.
2 "(styrene content = 25%, vinyl content = 15% and T
Non-oil-extended SBR whose g is -52 ° C) SBR-4: "Nipol 952" manufactured by Nippon Zeon Co., Ltd.
0 ”(styrene content = 38%, vinyl content = 14% and T
g is -32 ° C. SBR, 37.5 phr oil extension) BR: "Nipol 122 manufactured by Nippon Zeon Co., Ltd."
0 "(Tg = -101 ° C)
【００１４】カーボンブラック−１：Ｎ2 ＳＡ＝１３８
m2／ｇ，ＤＢＰ＝１１７ml／１００ｇ，ΔＤＢＰ＝１５
ml／１００ｇ，ΔＤｓｔ＝７３ｍμのカーボンブラック カーボンブラック−２：Ｎ2 ＳＡ＝１５２m2／ｇ，ＤＢ
Ｐ＝１３１ml／１００ｇ，ΔＤＢＰ＝３１ml／１００
ｇ，ΔＤｓｔ＝４４ｍμのカーボンブラック カーボンブラック−３：Ｎ2 ＳＡ＝ ９４m2／ｇ，ＤＢ
Ｐ＝１２１ml／１００ｇ，ΔＤＢＰ＝２３ml／１００
ｇ，ΔＤｓｔ＝７３ｍμのカーボンブラックCarbon black-1: N 2 SA = 138
m 2 / g, DBP = 117 ml / 100 g, ΔDBP = 15
Carbon black with ml / 100g and ΔDst = 73mμ Carbon black-2: N 2 SA = 152m 2 / g, DB
P = 131 ml / 100 g, ΔDBP = 31 ml / 100
g, ΔDst = 44 mμ of carbon black Carbon black-3: N 2 SA = 94 m 2 / g, DB
P = 121 ml / 100 g, ΔDBP = 23 ml / 100
Carbon black with g, ΔDst = 73 mμ
【００１５】（注）カーボンブラックの特性の測定方法 （ａ）窒素比表面積（Ｎ2 ＳＡ） ASTM-D3037-78 "Standard Methods of Treating Carbon
Black-Surface Area by Nitrogen Adsorption" Method
Cによる。 （ｂ）ジブチルフタレート吸油量（ＤＢＰ吸油量） ＪＩＳ Ｋ６２２１ 「ゴム用カーボンブラック試験方
法」６．１．２（１）Ａ法による。 （ｃ）２４Ｍ４ＤＢＰ吸油量 ＡＳＴＭ−Ｄ３４９３による。 （ｄ）ΔＤＢＰ ＤＢＰ吸油量−２４Ｍ４ＤＢＰ吸油量。 （ｅ）凝集体分布の半値幅（ΔＤｓｔ） ディスクセントリフュージ（英国 Joice Loebl社製）を
用いて、次の方法により測定した。即ち、カーボンブラ
ックを精秤し、２０容量％のエタノール水溶液と界面活
性剤とを加え、カーボンブラック濃度を５mg／１００cc
となるように超音波で分散させて試料溶液を作製する。
次に、ディスクセントリフュージの回転速度を８０００
rpm に設定し、スピン液（蒸留水）１０mlをこのディス
クセントリフュージに加えた後に０．５mlのバッファー
液（２０容量％エタノール水溶液）を注入する。次い
で、これに試料溶液０．５〜１．０mlを注射器で加え、
遠心沈降を開始させ、光沈降法によりストークス径で換
算された凝集体分布曲線を作成する。そのヒストグラム
における最多頻度（最大吸光度）の１／２のときの凝集
体の分布値を半値幅（ΔＤｓｔ）とする。 (Note) Method for measuring characteristics of carbon black (a) Nitrogen specific surface area (N 2 SA) ASTM-D3037-78 "Standard Methods of Treating Carbon
Black-Surface Area by Nitrogen Adsorption "Method
By C. (B) Dibutyl phthalate oil absorption (DBP oil absorption) According to JIS K6221 "Rubber carbon black test method" 6.1.2 (1) A method. (C) 24M4DBP oil absorption amount According to ASTM-D3493. (D) ΔDBP DBP oil absorption −24M4 DBP oil absorption. (E) Full width at half maximum (ΔDst) of aggregate distribution It was measured by the following method using Disc Centrifuge (manufactured by Joice Loebl, UK). That is, carbon black is precisely weighed, 20% by volume aqueous ethanol solution and a surfactant are added, and the carbon black concentration is 5 mg / 100 cc.
And disperse with ultrasonic waves to prepare a sample solution.
Next, set the rotation speed of the disc centrifuge to 8000.
The spin rate (distilled water) (10 ml) was added to this disc centrifuge, and 0.5 ml of a buffer solution (20% by volume aqueous ethanol solution) was injected. Then add 0.5-1.0 ml of the sample solution to this with a syringe,
Centrifugal sedimentation is started, and an aggregate distribution curve converted by Stokes diameter is created by the photosedimentation method. The distribution value of the aggregate at half the most frequent frequency (maximum absorbance) in the histogram is defined as the half-value width (ΔDst).
【００１６】アロマチックオイル：共同石油（株）製
“プロセスオイル Ｘ−１４０” 亜鉛華 ：正同化学（株）製“亜鉛華３号” ステアリン酸 ：花王石鹸（株）製“Ｌｕｎａｃ ｙ
ａ” 老化防止剤 ：Ｎ−フェニル−Ｎ′−（１，３−ジ
メチル）−ｐ−フェニレンジアミン（住友化学工業
（株）製“アンチゲン６Ｃ”） ワックス ：大内新興化学（株）製“サンノック” イオウ ：油処理イオウ 加硫促進剤 ：Ｎ−ｔｅｒｔ−ブチル−２−ベンゾ
チゾイル−スルフェンアミド（大内新興化学（株）製
“ノクセラー ＮＳ−Ｆ”）Aromatic oil: "Process Oil X-140" manufactured by Kyodo Oil Co., Ltd. Zinc flower: "Zinc flower No. 3" manufactured by Shodo Kagaku Co., Ltd. Stearic acid: "Lunacy" manufactured by Kao Soap Co., Ltd.
a "Anti-aging agent: N-phenyl-N '-(1,3-dimethyl) -p-phenylenediamine (" Antigen 6C "manufactured by Sumitomo Chemical Co., Ltd.) Wax:" Sunnock manufactured by Ouchi Shinko Chemical Co., Ltd. " Sulfur: Oil-treated sulfur Vulcanization accelerator: N-tert-butyl-2-benzotizoyl-sulfenamide (Ouchi Shinko Kagaku Co., Ltd. “Nocceller NS-F”)
【００１７】表Ｉに示した配合物の性能評価試験方法は
以下の通りである。 〔１〕ランボーン摩耗 ランボーン摩耗試験機（岩本製作所（株）製）を用い
て、温度２０℃の所定の条件で摩耗減量を測定し、それ
ぞれの値を比較例１を１００として指数表示した。この
数値が大きくなる程、耐摩耗性が良好であることを示
す。 〔２〕３００％モジュラス ＪＩＳ Ｋ ６３０１に準じて、常温での引張試験を実
施し、３００％伸張時の引張応力を測定した。 〔３〕反発弾性 ＪＩＳ Ｋ ６３０１に準じて、温度６０℃のときの反
発弾性を測定し、それぞれの値を比較例１を１００とし
て指数表示した。この値が高いほど燃費性が良好である
ことを示す。 〔４〕ウェットスキッド ブリティッシュ・ポータブル・スキッドテスターを用い
て、湿潤路面、温度２０℃の条件下で測定し、それぞれ
の値を比較例１を１００として指数表示した。この数値
が大きくなる程、ウェットスキッド抵抗が優れているこ
とを示す。 〔５〕脆化温度 ＪＩＳ Ｋ ６３０１に準じて、低温衝撃脆化試験を実
施した。この値が低いほど冬期性能に優れる。 〔６〕ドライ操縦安定性 乾燥路面でテストドライバーによる各タイヤのフィーリ
ングを採点し、比較例１を１００として指数表示した。
数値は大きくなる程、操縦安定性が良好であることを示
す。The performance evaluation test methods for the formulations shown in Table I are as follows. [1] Lambourn Abrasion A Lambourn abrasion tester (manufactured by Iwamoto Seisakusho Co., Ltd.) was used to measure the abrasion loss under a predetermined condition of a temperature of 20 ° C., and each value was expressed as an index with 100 as Comparative Example 1. The larger this value is, the better the abrasion resistance is. [2] 300% Modulus A tensile test was performed at room temperature according to JIS K 6301, and the tensile stress at 300% elongation was measured. [3] Impact resilience: The impact resilience at a temperature of 60 ° C. was measured according to JIS K 6301, and each value was represented as an index with Comparative Example 1 being 100. The higher this value, the better the fuel economy. [4] Wet skid Using a British portable skid tester, measurement was carried out under conditions of a wet road surface and a temperature of 20 ° C., and each value was indicated as an index with Comparative Example 1 being 100. The larger this value is, the better the wet skid resistance is. [5] Embrittlement temperature A low temperature impact embrittlement test was performed according to JIS K6301. The lower this value, the better the winter performance. [6] Dry Steering Stability The feeling of each tire by a test driver was scored on a dry road surface, and the comparative example 1 was set to 100 and indexed.
The larger the value, the better the steering stability.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】[0020]
【発明の効果】表Ｉにおいて、比較例１は従来の典型的
なキャップコンパウンドの配合例であり、脆化温度を除
いて各例の特性値を比較例１の値を１００として指数表
示した。実施例１〜５は本発明例を示し、表Ｉの結果か
ら明らかなように、ウェットスキッド及びドライ操縦安
定性を維持したまま（又は若干改良した上で）、耐摩耗
性、低燃費性、冬期性能が改良されていることが明らか
である。In Table I, Comparative Example 1 is a conventional example of a typical cap compound formulation, and the characteristic values of each example except the embrittlement temperature are indexed with the value of Comparative Example 1 being 100. Examples 1 to 5 show examples of the present invention, and as is clear from the results of Table I, while maintaining wet skid and dry steering stability (or after being slightly improved), wear resistance, fuel economy, It is clear that winter performance is improved.
【００２１】比較例２及び３は実施例１及び２に対し、
カーボン配合量が規定量をはずれた例で、カーボン配合
量が多すぎると低燃費性及び冬期性能が低下し、逆に少
なすぎると、耐摩耗性及びウェットスキッド抵抗が極端
に低下するので好ましくない。比較例４〜９は本発明の
規定外のポリマー系を用いた例で、表Ｉの結果から明ら
かなように、各性能のバランスがくずれ、全てをうまく
バランス化することができない。比較例１０〜１２は本
発明の規定外のカーボンを使用した系で各実施例で用い
たカーボン特有の低ローディン域での効果がでず、表Ｉ
に示すように、耐摩耗性、ウェットスキッド抵抗が低下
する。Comparative Examples 2 and 3 are different from Examples 1 and 2,
In an example where the carbon content is out of the specified range, if the carbon content is too large, the fuel economy and winter performance will decrease, and if it is too small, the wear resistance and wet skid resistance will extremely decrease, which is not preferable. . Comparative Examples 4 to 9 are examples using a polymer system out of the definition of the present invention, and as is clear from the results in Table I, the balance of each performance is lost, and all cannot be well balanced. Comparative Examples 10 to 12 are systems using carbon outside the scope of the present invention, and the effect in the low rhodin region peculiar to carbon used in each Example was not exhibited, and Table I
As shown in, wear resistance and wet skid resistance are reduced.
【００２２】以上説明したように、本発明は、特定のＳ
ＡＦ級カーボンを、特定のポリマー系に従来より比較的
少量配合することにより、ウェットグリップ、ドライ操
縦安定性を維持しつつ、耐摩耗性、低燃費性、冬期性能
及び耐経時変化性を改良し、これらを高次バランス化さ
せることができる。As explained above, according to the present invention, the specific S
By adding a relatively small amount of AF grade carbon to a specific polymer system compared with conventional ones, we improved wear resistance, fuel economy, winter performance and aging resistance while maintaining wet grip and dry steering stability. It is possible to make these higher-order balanced.
Claims (1)
−３０℃より高いスチレン−ブタジエン共重合体ゴム２
５〜５０重量％、（ii）ガラス転移温度（Ｔｇ）が−５
０℃より高く−３０℃以下のスチレン−ブタジエン共重
合体ゴム２５〜６５重量％及び（iii)ガラス転移温度
（Ｔｇ）が−５０℃以下のジエン系ゴム５〜３０重量％
からなるゴム分１００重量部並びに（２）窒素比表面積
（Ｎ2 ＳＡ）１４０m2／ｇ以上、ＤＢＰ吸油量１００ml
／１００ｇ以上、ΔＤＢＰ ３０ml／１００ｇ以上及び
ΔＤｓｔ ５０ｍμ以下のカーボンブラック３０〜７０
重量部を含むゴム組成物をキャップトレッド部に使用し
たことを特徴とする空気入りタイヤ。1. A styrene-butadiene copolymer rubber 2 having (1) (i) a glass transition temperature (Tg) higher than -30 ° C.
5 to 50% by weight, (ii) glass transition temperature (Tg) of -5
25 to 65% by weight of styrene-butadiene copolymer rubber having a temperature higher than 0 ° C and -30 ° C or less, and (iii) 5 to 30% by weight of diene rubber having a glass transition temperature (Tg) of -50 ° C or less.
(2) Nitrogen specific surface area (N 2 SA) 140 m 2 / g or more, DBP oil absorption 100 ml
/ 100 g or more, ΔDBP 30 ml / 100 g or more and ΔDst 50 mμ or less of carbon black 30 to 70
A pneumatic tire characterized in that a rubber composition containing a part by weight is used for a cap tread part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6325719A JPH08176348A (en) | 1994-12-27 | 1994-12-27 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6325719A JPH08176348A (en) | 1994-12-27 | 1994-12-27 | Pneumatic tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08176348A true JPH08176348A (en) | 1996-07-09 |
Family
ID=18179931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6325719A Pending JPH08176348A (en) | 1994-12-27 | 1994-12-27 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08176348A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005023295A (en) * | 2003-06-30 | 2005-01-27 | Goodyear Tire & Rubber Co:The | Pneumatic tire having element containing three-component-blended rubber and silica |
| US20110048599A1 (en) * | 2009-08-31 | 2011-03-03 | Jennifer Lyn Ryba | Tire with rubber tread containing combination of resin blend and functionalized elastomer |
| US20120138203A1 (en) * | 2010-12-06 | 2012-06-07 | Christian Jean-Marie Kaes | Pneumatic tire |
| CN105283514A (en) * | 2013-05-14 | 2016-01-27 | 狮王株式会社 | Carbon black, electrically conductive resin composition, and electrode mixture |
| US20200071506A1 (en) * | 2018-09-04 | 2020-03-05 | The Goodyear Tire & Rubber Company | Pneumatic tire |
-
1994
- 1994-12-27 JP JP6325719A patent/JPH08176348A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005023295A (en) * | 2003-06-30 | 2005-01-27 | Goodyear Tire & Rubber Co:The | Pneumatic tire having element containing three-component-blended rubber and silica |
| US20110048599A1 (en) * | 2009-08-31 | 2011-03-03 | Jennifer Lyn Ryba | Tire with rubber tread containing combination of resin blend and functionalized elastomer |
| US8459319B2 (en) * | 2009-08-31 | 2013-06-11 | The Goodyear Tire & Rubber Company | Tire with rubber tread containing combination of resin blend and functionalized elastomer |
| US20120138203A1 (en) * | 2010-12-06 | 2012-06-07 | Christian Jean-Marie Kaes | Pneumatic tire |
| US9126457B2 (en) * | 2010-12-06 | 2015-09-08 | The Goodyear Tire & Rubber Company | Pneumatic tire having first tread cap zone and second tread cap zone |
| CN105283514A (en) * | 2013-05-14 | 2016-01-27 | 狮王株式会社 | Carbon black, electrically conductive resin composition, and electrode mixture |
| US20200071506A1 (en) * | 2018-09-04 | 2020-03-05 | The Goodyear Tire & Rubber Company | Pneumatic tire |
| CN110872408A (en) * | 2018-09-04 | 2020-03-10 | 固特异轮胎和橡胶公司 | Pneumatic tire |
| US10767034B2 (en) * | 2018-09-04 | 2020-09-08 | The Goodyear Tire & Rubber Company | Pneumatic tire |
| CN110872408B (en) * | 2018-09-04 | 2022-03-11 | 固特异轮胎和橡胶公司 | Pneumatic tire |
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