JP4616550B2 - Rubber composition for tire tread - Google Patents
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- JP4616550B2 JP4616550B2 JP2003418197A JP2003418197A JP4616550B2 JP 4616550 B2 JP4616550 B2 JP 4616550B2 JP 2003418197 A JP2003418197 A JP 2003418197A JP 2003418197 A JP2003418197 A JP 2003418197A JP 4616550 B2 JP4616550 B2 JP 4616550B2
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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
- 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
Description
本発明は、タイヤトレッド用ゴム組成物に関し、とりわけ転がり抵抗の低減とグリップ性の向上を両立し、さらに耐摩耗性の改善されたタイヤトレッド用ゴム組成物に関する。 The present invention relates to a rubber composition for tire treads, and more particularly to a rubber composition for tire treads that achieves both reduction in rolling resistance and improvement in grip properties and improved wear resistance.
近年、環境問題のために、乗用車・トラック・バス用タイヤの転がり抵抗の低減（低燃費化）が厳しく求められている。また、自動車タイヤに要求される特性は、転がり抵抗の低減のほかにも、操縦安定性、耐摩耗性、乗り心地など多岐にわたる。これらの性能のうち、とくにタイヤのグリップ性と転がり抵抗は、いずれもゴムのヒステリシスロスに関する特性である。一般に、ヒステリシスロスを大きくすると、グリップ力は高くなり制動性能が向上するが、転がり抵抗も大きくなり燃費の増大をもたらす。このように、グリップ性と転がり抵抗は二律背反する関係にあるため、これらを同時に満足させることが非常に難しく、種々の工夫がなされてきた。 In recent years, due to environmental problems, reduction of rolling resistance (reduction in fuel consumption) of tires for passenger cars, trucks, and buses is strictly demanded. In addition to the reduction of rolling resistance, the characteristics required for automobile tires vary widely, including handling stability, wear resistance, and ride comfort. Of these performances, tire grip and rolling resistance, in particular, are properties relating to the hysteresis loss of rubber. In general, when the hysteresis loss is increased, the gripping force is increased and the braking performance is improved, but the rolling resistance is increased and the fuel consumption is increased. Thus, since grip property and rolling resistance are in contradictory relations, it is very difficult to satisfy them simultaneously, and various ideas have been made.
転がり抵抗の低減およびグリップ性能の向上を両立させるために、ゴム組成物にタングステンなどの無機化合物を添加する方法（特許文献１参照）が提案されているが、転がり抵抗の低減およびグリップ性能の向上を高度に両立させるゴム組成物は、未だに存在していないのが現状である。 In order to achieve both reduction in rolling resistance and improvement in grip performance, a method of adding an inorganic compound such as tungsten to the rubber composition has been proposed (see Patent Document 1). However, reduction in rolling resistance and improvement in grip performance are proposed. The present situation is that there is not yet a rubber composition that achieves a high degree of compatibility.
本発明は、転がり抵抗の低減とグリップ性の向上を高度に両立させ得るタイヤトレッド用ゴム組成物を提供することを目的とする。 An object of this invention is to provide the rubber composition for tire treads which can make rolling resistance reduction and the improvement of grip property highly compatible.
本発明は、−Ｓ−（Ｓ）n−の架橋結合（式中、ｎは、１〜７の整数である）を有するポリブタジエンゴム、その他のジエン系ゴム、およびチッ素吸着比表面積が１００ｍ2／ｇ以上のカーボンブラックからなるタイヤトレッド用ゴム組成物に関する。 The present invention relates to a polybutadiene rubber having a —S— (S) n — crosslink (where n is an integer of 1 to 7), other diene rubbers, and a nitrogen adsorption specific surface area of 100 m 2. The present invention relates to a rubber composition for a tire tread comprising carbon black of / g or more.
また、本発明は、−Ｓ−（Ｓ）n−の架橋結合（式中、ｎは、１〜７の整数である）を有するポリブタジエンゴム、その他のジエン系ゴム、およびシリカからなるタイヤトレッド用ゴム組成物に関する。 The present invention also relates to a tire tread comprising a polybutadiene rubber having a —S— (S) n — crosslink (where n is an integer of 1 to 7), other diene rubbers, and silica. The present invention relates to a rubber composition.
本発明によれば、−Ｓ−（Ｓ）n−の架橋結合を有するポリブタジエンゴムおよびその他のジエン系ゴムを配合することにより、転がり抵抗の低減とグリップ性の向上を高度に両立し、さらに耐摩耗性の改善されたタイヤトレッド用ゴム組成物を提供することができる。 According to the present invention, by blending a polybutadiene rubber having a cross-linkage of —S— (S) n — and other diene rubbers, both reduction in rolling resistance and improvement in grip properties are achieved at the same time, and further resistance to resistance is achieved. A rubber composition for tire treads with improved wear can be provided.
本発明の第１のタイヤトレッド用ゴム組成物は、−Ｓ−（Ｓ）n−の架橋結合（式中、ｎは１〜７の整数である）を有するポリブタジエンゴム（硫黄含有ＢＲ）、その他のジエン系ゴム成分、およびカーボンブラックを含有する。 The first rubber composition for a tire tread of the present invention is a polybutadiene rubber (sulfur-containing BR) having a crosslink bond of —S— (S) n — (wherein n is an integer of 1 to 7), etc. A diene rubber component, and carbon black.
ＢＲが有する架橋結合−Ｓ−（Ｓ）n−において、ｎは１〜７の整数である。ｎの下限については１であることが好ましく、上限については７であることが好ましい。ｎが１未満では、架橋結合のＣ−Ｓの解離エネルギーが大きすぎて、硫黄含有ＢＲの反応性が低下する。ｎが７をこえると、加硫戻りしやすくなる、あるいは加硫中、時間経過によりゴム組成物が著しく硬化する。 In the cross-linked bond —S— (S) n — that BR has, n is an integer of 1 to 7. The lower limit of n is preferably 1, and the upper limit is preferably 7. If n is less than 1, the C—S dissociation energy of the cross-linking bond is too large, and the reactivity of the sulfur-containing BR decreases. When n exceeds 7, it becomes easy to return to vulcanization, or during the vulcanization, the rubber composition is markedly cured over time.
硫黄含有ＢＲの−Ｓ−（Ｓ）n−の架橋結合は、二塩化硫黄などの硫化剤とポリブタジエンとを反応させることによって、ポリマー鎖間に導入される。たとえば、ＢＲの重合反応の最終段階で、または重合反応後に硫化剤を添加することで硫化剤とＢＲを反応させて、−Ｓ−（Ｓ）n−の架橋結合を導入することができる。−Ｓ−（Ｓ）n−の架橋結合を導入することにより、他のゴム成分との混練り中に、若干の加硫（自己動的加硫）が生じて他のゴムとの相容性が向上し、該ＢＲが微分散する。ここで自己動的加硫とは、加硫剤を別途加えないで生じる加硫を示す。該ＢＲが微分散することによって、転がり抵抗が低減される。 The —S— (S) n — crosslink of the sulfur-containing BR is introduced between the polymer chains by reacting a sulfurizing agent such as sulfur dichloride with polybutadiene. For example, a sulfurizing agent and BR can be reacted at the final stage of the BR polymerization reaction or by adding a sulfurizing agent after the polymerization reaction to introduce —S— (S) n — crosslinks. -S- (S) n- crosslinks are introduced, so that some vulcanization (self-dynamic vulcanization) occurs during kneading with other rubber components, and compatibility with other rubbers. And BR is finely dispersed. Here, the self-dynamic vulcanization refers to vulcanization that occurs without adding a vulcanizing agent separately. When the BR is finely dispersed, rolling resistance is reduced.
硫黄含有ＢＲの硫黄含有率は、該ポリブタジエンゴム中に０．００１〜５重量％であることが好ましい。０．００１重量％未満では、転がり抵抗の低減効果が得られない傾向がある。また、５重量％をこえると、混練り中にゴム焼けを生じる傾向が高くなる。 The sulfur content of the sulfur-containing BR is preferably 0.001 to 5% by weight in the polybutadiene rubber. If it is less than 0.001% by weight, there is a tendency that the effect of reducing rolling resistance cannot be obtained. On the other hand, if it exceeds 5% by weight, the tendency to cause rubber burn during kneading increases.
本発明の第１のタイヤトレッド用ゴム組成物における硫黄含有ＢＲの含有量の下限は、硫黄含有ＢＲおよびその他のゴム成分からなる全ゴム成分中に、５重量％であることが好ましく、１０重量％であることがより好ましい。また、含有量の上限については、６０重量％であることが好ましく、５０重量％であることがより好ましい。５重量％未満では、硫黄含有ＢＲの量が少なくなりすぎて転がり抵抗の低減効果が得られない傾向がある。また、６０重量％をこえると、硫黄含有ＢＲ量が増えすぎて、タイヤとして充分なウェットグリップ性が得られなくなる傾向がある。 The lower limit of the content of sulfur-containing BR in the first rubber composition for a tire tread of the present invention is preferably 5% by weight in the total rubber component composed of sulfur-containing BR and other rubber components. % Is more preferable. Moreover, about the upper limit of content, it is preferable that it is 60 weight%, and it is more preferable that it is 50 weight%. If it is less than 5% by weight, the amount of sulfur-containing BR tends to be too small, and the rolling resistance reduction effect tends not to be obtained. On the other hand, when it exceeds 60% by weight, the amount of sulfur-containing BR tends to increase so that sufficient wet grip properties as a tire tend not to be obtained.
本発明のタイヤトレッド用ゴム組成物は、硫黄含有ＢＲのほかのジエン系ゴムを含有する。具体的には、天然ゴム（ＮＲ）、ポリイソプレンゴム（ＩＲ）、ポリブタジエンゴム（ＢＲ）およびスチレンブタジエンゴム（ＳＢＲ）などがあげられ、中でも硫黄含有ＢＲとの相容性が高いことから、ＮＲ、ＩＲおよびＢＲを含有することが好ましい。 The rubber composition for a tire tread of the present invention contains a diene rubber other than sulfur-containing BR. Specific examples include natural rubber (NR), polyisoprene rubber (IR), polybutadiene rubber (BR), and styrene butadiene rubber (SBR). Among them, NR is highly compatible with sulfur-containing BR. , IR and BR are preferably contained.
カーボンブラックとしては、チッ素吸着比表面積（Ｎ2ＳＡ）が１００ｍ2／ｇ以上のものが使用される。Ｎ2ＳＡが１００ｍ2／ｇ未満では、充分な耐摩耗性が得られない。 Carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 100 m 2 / g or more is used. When N 2 SA is less than 100 m 2 / g, sufficient wear resistance cannot be obtained.
カーボンブラックの配合量の下限は、前記硫黄含有ＢＲおよびその他のジエン系ゴムの合計量（ゴム成分）１００重量部に対して、２０重量部であることが好ましく、３０重量部であることがより好ましく、カーボンブラックの配合量の上限は、１００重量部であることが好ましく、９０重量部であることがより好ましい。カーボンブラックの配合量が２０重量部未満では、充分な耐摩耗性が得られない傾向がある。また、配合量が１００重量部をこえると、ゴムが硬くなりすぎて、充分なグリップ性が得られない傾向がある。 The lower limit of the amount of carbon black is preferably 20 parts by weight and more preferably 30 parts by weight with respect to 100 parts by weight of the total amount (rubber component) of the sulfur-containing BR and other diene rubbers. Preferably, the upper limit of the compounding amount of carbon black is preferably 100 parts by weight, and more preferably 90 parts by weight. When the blending amount of carbon black is less than 20 parts by weight, there is a tendency that sufficient wear resistance cannot be obtained. On the other hand, if the blending amount exceeds 100 parts by weight, the rubber becomes too hard, and there is a tendency that sufficient grip properties cannot be obtained.
本発明の第２のタイヤトレッド用ゴム組成物は、−Ｓ−（Ｓ）n−の架橋結合（式中、ｎは１〜７の整数である）を有するポリブタジエンゴム（硫黄含有ＢＲ）、その他のジエン系ゴム成分、およびシリカを含有する。 The second rubber composition for a tire tread of the present invention is a polybutadiene rubber (sulfur-containing BR) having a crosslink bond of -S- (S) n- (wherein n is an integer of 1 to 7), etc. A diene rubber component and silica.
第２のタイヤトレッド用ゴム組成物に用いる硫黄含有ＢＲ、その他のジエン系ゴム成分は、第１のタイヤトレッド用ゴム組成物で用いたものと同様のものを用いる。 The sulfur-containing BR and other diene rubber components used in the second tire tread rubber composition are the same as those used in the first tire tread rubber composition.
本発明の第２のタイヤトレッド用ゴム組成物における硫黄含有ＢＲの含有量の下限は、硫黄含有ＢＲおよびその他のゴム成分からなる全ゴム成分中に、５重量％であることが好ましく、１０重量％であることがより好ましい。また、含有量の上限については、６０重量％であることが好ましく、５０重量％であることがより好ましい。５重量％未満では、硫黄含有ＢＲの量が少なくなりすぎて転がり抵抗の低減効果が得られない傾向がある。また、６０重量％をこえると、硫黄含有ＢＲ量が増えすぎて、タイヤとして充分なウェットグリップ性が得られなくなる傾向がある。 The lower limit of the content of sulfur-containing BR in the second rubber composition for a tire tread of the present invention is preferably 5% by weight in the total rubber component composed of sulfur-containing BR and other rubber components. % Is more preferable. Moreover, about the upper limit of content, it is preferable that it is 60 weight%, and it is more preferable that it is 50 weight%. If it is less than 5% by weight, the amount of sulfur-containing BR tends to be too small, and the rolling resistance reduction effect tends not to be obtained. On the other hand, when it exceeds 60% by weight, the amount of sulfur-containing BR tends to increase so that sufficient wet grip properties as a tire tend not to be obtained.
シリカとしては、湿式法または乾式法により製造されたシリカがあげられるが、とくに制限はない。 Silica includes silica produced by a wet method or a dry method, but is not particularly limited.
シリカのチッ素吸着比表面積（Ｎ2ＳＡ）の下限については１２０ｍ2／ｇであることが好ましく、１５０ｍ2／ｇであることがより好ましい。上限については３００ｍ2／ｇであることが好ましく、２７０ｍ2／ｇであることがより好ましい。Ｎ2ＳＡが１２０ｍ2／ｇ未満では、充分な補強性が得られない傾向がある。また、Ｎ2ＳＡが３００ｍ2／ｇをこえると、ゴム中で充分に分散しない傾向がある。 The lower limit of the nitrogen adsorption specific surface area (N 2 SA) of silica is preferably 120 m 2 / g, and more preferably 150 m 2 / g. The upper limit is preferably 300 m 2 / g, and more preferably 270 m 2 / g. If N 2 SA is less than 120 m 2 / g, sufficient reinforcing properties tend not to be obtained. Further, when N 2 SA exceeds 300 m 2 / g, there is a tendency that the rubber is not sufficiently dispersed in the rubber.
シリカの配合量の下限は、前記硫黄含有ＢＲおよびその他のジエン系ゴムの合計量（ゴム成分）１００重量部に対して、１０重量部であることが好ましく、２０重量部であることがより好ましい。上限は９０重量部であることが好ましく、８０重量部であることがより好ましい。シリカの配合量が１０重量部未満では、シリカによるウェットグリップ性の改善効果が得られない傾向がある。また、配合量が９０重量部をこえると、ゴムが硬くなりすぎる傾向がある。 The lower limit of the amount of silica is preferably 10 parts by weight and more preferably 20 parts by weight with respect to 100 parts by weight of the total amount (rubber component) of the sulfur-containing BR and other diene rubbers. . The upper limit is preferably 90 parts by weight, and more preferably 80 parts by weight. When the amount of silica is less than 10 parts by weight, there is a tendency that the effect of improving wet grip properties by silica cannot be obtained. On the other hand, when the blending amount exceeds 90 parts by weight, the rubber tends to be too hard.
本発明のゴム組成物には、カーボンブラックおよびシリカを共に配合することができる。 Both carbon black and silica can be blended in the rubber composition of the present invention.
カーボンブラックおよびシリカの合計量の下限は、前記硫黄含有ＢＲおよびその他のジエン系ゴムの合計量１００重量部に対して、２０重量部であることが好ましく、３０重量部であることがより好ましく、上限は１２０重量部であることが好ましく、１００重量部であることがより好ましい。カーボンブラックおよびシリカの合計量が２０重量部未満では、充分な耐摩耗性が得られない傾向がある。また、合計量が１２０重量部をこえると、カーボンブラックおよびシリカのゴムへの分散が充分におこらず、耐摩耗性が悪化すると同時に、ゴムが硬くなる傾向がある。 The lower limit of the total amount of carbon black and silica is preferably 20 parts by weight, more preferably 30 parts by weight with respect to 100 parts by weight of the total amount of the sulfur-containing BR and other diene rubbers, The upper limit is preferably 120 parts by weight, and more preferably 100 parts by weight. When the total amount of carbon black and silica is less than 20 parts by weight, sufficient wear resistance tends to be not obtained. On the other hand, when the total amount exceeds 120 parts by weight, carbon black and silica are not sufficiently dispersed in the rubber, and the wear resistance is deteriorated and the rubber tends to be hard.
なお、本発明のゴム組成物には、硫黄含有ＢＲ、その他のジエン系ゴム、カーボンブラック、シリカのほかにも、必要に応じて、シランカップリング剤、可塑剤、軟化剤、老化防止剤、加硫剤、加硫促進剤、加硫促進助剤などの通常のゴム工業で使用される配合剤を適宜配合することができる。 In addition to the sulfur-containing BR, other diene rubbers, carbon black, and silica, the rubber composition of the present invention includes, as necessary, a silane coupling agent, a plasticizer, a softening agent, an anti-aging agent, A compounding agent used in a normal rubber industry such as a vulcanizing agent, a vulcanization accelerator, and a vulcanization accelerating aid can be appropriately blended.
本発明のゴム組成物は、タイヤトレッドに用いられることが好ましい。 The rubber composition of the present invention is preferably used for a tire tread.
以下に、実施例に基づいて本発明を具体的に説明するが、本発明はこれらのみに制限されるものではない。 EXAMPLES The present invention will be specifically described below based on examples, but the present invention is not limited to these.
以下に、実施例および比較例で用いた材料をまとめて示す。
ＮＲ：ＲＳＳ＃３
ＢＲ１：宇部興産（株）製のＵＢＥＰＯＬ ＢＲ１５０Ｂ
硫黄含有ＢＲ：バイエル社製のＢＵＮＡ ＣＢ２４（−Ｓ−（Ｓ）n−の架橋結合（ｎ＝１）を含有
カーボンブラック：昭和キャボット（株）製のショウブラックＮ２２０（Ｎ2ＳＡ：１２５ｍ2／ｇ）
シリカ：デグッサ社製のウルトラジルＶＮ３（Ｎ2ＳＡ：２１０ｍ2／ｇ）
ワックス：大内新興化学工業（株）製のサンノックＮ
老化防止剤：大内新興化学工業（株）製のノクラック６Ｃ
ステアリン酸：日本油脂（株）製
酸化亜鉛：三井金属鉱業（株）製の亜鉛華２種
硫黄：鶴見化学工業（株）製の粉末硫黄
加硫促進剤：大内新興化学工業（株）製のノクセラーＮＳ（Ｎ−ｔｅｒｔ−ブチル−２−ベンゾチアジルスルフェンアミド）
The materials used in the examples and comparative examples are collectively shown below.
NR: RSS # 3
BR1: UBEPOL BR150B manufactured by Ube Industries, Ltd.
Sulfur-containing BR: BUNA CB24 (-S- (S) n- cross-linked bond (n = 1)) manufactured by Bayer Co., Ltd. Carbon black: Show Black N220 (N 2 SA: 125 m 2 / manufactured by Showa Cabot Corporation) g)
Silica: Ultrazil VN3 manufactured by Degussa (N 2 SA: 210 m 2 / g)
Wax: Sunnock N manufactured by Ouchi Shinsei Chemical Industry Co., Ltd.
Anti-aging agent: NOCRACK 6C manufactured by Ouchi Shinsei Chemical Co., Ltd.
Stearic acid: Nippon Oil & Fats Co., Ltd. Zinc oxide: Mitsui Mining & Mining Co., Ltd. Zinc Hua 2 types sulfur: Tsurumi Chemical Co., Ltd. powder sulfur vulcanization accelerator: Ouchi Shinsei Chemical Industry Co., Ltd. Noxeller NS (N-tert-butyl-2-benzothiazylsulfenamide)
実施例１〜２および比較例１
表１に示す配合に従い、まず加硫剤、加硫促進剤以外の材料をバンバリーミキサーを用いて１２０℃で３分間混練りし、そののち、加硫剤および加硫促進剤を加え、ロールを用いて５０℃で５分間混練りした。得られた混練り物を１５０℃で３０分間加硫し、下記の試験に用いた。
Examples 1-2 and Comparative Example 1
In accordance with the formulation shown in Table 1, materials other than the vulcanizing agent and vulcanization accelerator are first kneaded at 120 ° C. for 3 minutes using a Banbury mixer, after which the vulcanizing agent and vulcanization accelerator are added, And kneaded at 50 ° C. for 5 minutes. The obtained kneaded material was vulcanized at 150 ° C. for 30 minutes and used for the following tests.
（ランボーン摩耗試験）
ランボーン摩耗試験機を用いて、荷重２．５ｋｇｆ、スリップ率４０％の条件で３分間摩耗させて摩耗重量を測定した。この摩耗重量を比重より摩耗体積（以下摩耗量）に変換した。そして比較例１の値を１００とし、指数で表示した。指数が小さいほど摩耗量が少なく、耐摩耗性に優れることを示す。
(Lambourn abrasion test)
Using a Lambourn abrasion tester, the abrasion weight was measured after abrasion for 3 minutes under the conditions of a load of 2.5 kgf and a slip ratio of 40%. The wear weight was converted from the specific gravity into a wear volume (hereinafter referred to as wear amount). And the value of the comparative example 1 was set to 100, and it displayed with the index | exponent. The smaller the index, the smaller the wear amount and the better the wear resistance.
（転がり抵抗）
（株）上島製作所製のスペクトロメーターを用いて、動的歪振幅±２％、周波数１０Ｈｚ、温度７０℃の条件でｔａｎδを測定した。比較例１を１００として、指数で表示した。数値が小さいほど転がり抵抗が低減され、良好であることを示す。
(Rolling resistance)
Using a spectrometer manufactured by Ueshima Seisakusho, tan δ was measured under the conditions of dynamic strain amplitude ± 2%, frequency 10 Hz, and temperature 70 ° C. Comparative example 1 was set to 100 and displayed as an index. A smaller numerical value indicates that rolling resistance is reduced and better.
（グリップ性）
ゴム組成物をトレッドに用い、１９５／６５Ｒ１５のタイヤを試作した。このタイヤを用いて、ドライアスファルト路面のテストコースにて実車走行を行なった。その際における操舵時のコントロール性をテストドライバーが評価した。比較例１を１００とし、指数が大きいほど、ドライ路面におけるグリップ性が高いことを示す。
(Grip property)
Using the rubber composition as a tread, a 195 / 65R15 tire was prototyped. Using this tire, the vehicle was run on a dry asphalt road test course. The test driver evaluated the controllability during steering. The comparative example 1 is set to 100, and the larger the index, the higher the grip performance on the dry road surface.
結果を表１に示す。 The results are shown in Table 1.
表１の結果から、硫黄含有ＢＲを配合することにより、転がり抵抗を大きく低減できることがわかる。また、それと同時にグリップ性をほぼ維持しながら、耐摩耗性も向上できることがわかる（実施例１）。また、カーボンブラックおよびシリカを配合すると、転がり抵抗の低減とグリップ性の向上を高度に両立できることがわかる（実施例２）。 From the results in Table 1, it can be seen that rolling resistance can be greatly reduced by blending sulfur-containing BR. At the same time, it can be seen that the wear resistance can be improved while substantially maintaining the grip (Example 1). It can also be seen that when carbon black and silica are blended, a reduction in rolling resistance and an improvement in grip performance can be achieved at a high level (Example 2).
Claims (1)
チッ素吸着比表面積が１００ｍ2／ｇ以上のカーボンブラック２０〜９０重量部および
チッ素吸着比表面積が１２０〜２７０ｍ2／ｇのシリカ１０〜９０重量部を含有し、
カーボンブラックおよびシリカの合計量が３０〜１２０重量部であるタイヤトレッド用ゴム組成物。 100% by weight of a rubber component consisting only of 10-50% by weight of polybutadiene rubber having a cross-linkage of —S— (S) n — (wherein n is an integer of 1-7) and 90-50% by weight of natural rubber Against
20 to 90 parts by weight of carbon black having a nitrogen adsorption specific surface area of 100 m 2 / g or more and 10 to 90 parts by weight of silica having a nitrogen adsorption specific surface area of 120 to 270 m 2 / g,
A rubber composition for a tire tread, wherein the total amount of carbon black and silica is 30 to 120 parts by weight.
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| JP2003418197A JP4616550B2 (en) | 2003-12-16 | 2003-12-16 | Rubber composition for tire tread |
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| JP5216045B2 (en) * | 2010-04-30 | 2013-06-19 | 住友ゴム工業株式会社 | Tire rubber composition and heavy duty tire |
| JP5480781B2 (en) * | 2010-11-19 | 2014-04-23 | 住友ゴム工業株式会社 | Rubber composition for pneumatic tread and pneumatic tire |
| JP5933497B2 (en) | 2013-09-17 | 2016-06-08 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP2015098561A (en) | 2013-11-20 | 2015-05-28 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6540750B2 (en) * | 2017-06-12 | 2019-07-10 | 住友ゴム工業株式会社 | Rubber composition and tire |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09183868A (en) * | 1995-12-20 | 1997-07-15 | Bayer Ag | Vulcanizable rubber composition for producing vehicle tire |
| JP2002234978A (en) * | 2000-12-12 | 2002-08-23 | Bayer Ag | Rubber composition for tire tread |
| JP2003012860A (en) * | 2001-06-27 | 2003-01-15 | Toyo Tire & Rubber Co Ltd | Rubber composition for tire |
| US20030200900A1 (en) * | 2002-04-25 | 2003-10-30 | Karsten Korth | Silane-modified oxidic or siliceous filler, process for its production and its use |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09183868A (en) * | 1995-12-20 | 1997-07-15 | Bayer Ag | Vulcanizable rubber composition for producing vehicle tire |
| JP2002234978A (en) * | 2000-12-12 | 2002-08-23 | Bayer Ag | Rubber composition for tire tread |
| JP2003012860A (en) * | 2001-06-27 | 2003-01-15 | Toyo Tire & Rubber Co Ltd | Rubber composition for tire |
| US20030200900A1 (en) * | 2002-04-25 | 2003-10-30 | Karsten Korth | Silane-modified oxidic or siliceous filler, process for its production and its use |
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