JP2000319447A - Rubber composition for tire tread - Google Patents

Rubber composition for tire tread

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Publication number
JP2000319447A
JP2000319447A JP11130277A JP13027799A JP2000319447A JP 2000319447 A JP2000319447 A JP 2000319447A JP 11130277 A JP11130277 A JP 11130277A JP 13027799 A JP13027799 A JP 13027799A JP 2000319447 A JP2000319447 A JP 2000319447A
Authority
JP
Japan
Prior art keywords
powder
rubber
tire tread
rubber composition
carbon black
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
Application number
JP11130277A
Other languages
Japanese (ja)
Other versions
JP3444814B2 (en
Inventor
Mamoru Uchida
守 内田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Rubber Industries Ltd
Original Assignee
Sumitomo Rubber Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Rubber Industries Ltd filed Critical Sumitomo Rubber Industries Ltd
Priority to JP13027799A priority Critical patent/JP3444814B2/en
Publication of JP2000319447A publication Critical patent/JP2000319447A/en
Application granted granted Critical
Publication of JP3444814B2 publication Critical patent/JP3444814B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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)

Abstract

PROBLEM TO BE SOLVED: To obtain a rubber composition for tire tread which composition keeps the rolling resistance without decreasing the workability and the wear resistance and improves the wet skid performance. SOLUTION: This rubber composition for tire tread is obtained by blending 100 pts.wt. of a natural rubber and/or a diene rubber, 5-35 pts.wt. of an inorganic compound powder having a specific gravity of not less than 3.5 and an average particle size of not more than 20 μm which comprises at least one kind of powder selected from the group consisting of tungsten powder, zinc powder, zirconium powder, zirconium silicate, zircon, barium sulfate powder, zinc white and titanium oxide powder, and 30-110 pts.wt. of carbon black.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、グリップ性能を保
持した低燃費タイヤトレッド用ゴム組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition for a fuel-efficient tire tread which retains grip performance.

【０００２】[0002]

【従来の技術】自動車タイヤに要求される性能は低燃費
のほか、操縦安定性、耐摩耗性、乗り心地など多岐にわ
たり、種々の工夫がなされている。これらの性能のう
ち、とくに転がり抵抗とグリップ性能は、ゴムのヒステ
リシスロスに関する特性である。2. Description of the Related Art Various performances are required for automobile tires, such as low fuel consumption, handling stability, wear resistance, and riding comfort. Among these performances, the rolling resistance and the grip performance are characteristics relating to the hysteresis loss of rubber.

【０００３】一般に、ヒステリシスロスを大きくするた
めにゴムのガラス転移温度を上げることや、配合するカ
ーボンブラックの粒径を細かくすることなどが行われ
る。その結果、グリップ力が高くなり制動性能は向上す
る。一方、同時に転がり抵抗も大きくなり燃費の増大を
もたらすことになる。また、シリカを高充填に配合する
方法も提案されているが、この場合は、ゴムの加工性が
低下する問題点がある。In general, to increase the hysteresis loss, the glass transition temperature of rubber is increased, and the particle size of carbon black to be compounded is reduced. As a result, the grip force is increased and the braking performance is improved. On the other hand, at the same time, the rolling resistance also increases, leading to an increase in fuel efficiency. Further, a method of blending silica at a high filling rate has been proposed, but in this case, there is a problem that the processability of rubber is reduced.

【０００４】このようにグリップ性能と転がり抵抗は相
反する関係にあるため、両特性を同時に満足させるべく
種々のタイヤトレッド用ゴム組成物が提案されている。As described above, since the grip performance and the rolling resistance are in an opposite relationship, various rubber compositions for tire treads have been proposed in order to satisfy both the characteristics at the same time.

【０００５】これらの問題点を改良した技術としては、
たとえば、欧州特許第５０１２２７号公報にある、特殊
なシリカと練りの工夫でウェットスキッド性能を向上さ
せたタイヤトレッド用ゴム組成物およびその製造法や、
特開平７−１４９９５０号公報にある、アルミニウム、
マグネシウム、チタンおよびカルシウムから選ばれる金
属酸化物、または金属水酸化物を含む１０μｍ以下の粒
径の無機化合物粉体を５〜３０重量部含むタイヤトレッ
ド用ゴム組成物などがある。しかしながら、前者につい
ては、ゴムの加工性に問題があり、電気抵抗が高くなっ
て静電気が発生する。一方、後者については、得られる
タイヤトレッド用ゴム組成物は、耐摩耗性、破壊特性が
充分でないという問題点がある。[0005] Techniques that have improved these problems include:
For example, in European Patent No. 501227, a rubber composition for a tire tread having improved wet skid performance by a special silica and kneading method, and a method for producing the same,
JP-A-7-149950 discloses aluminum,
There is a rubber composition for a tire tread containing 5 to 30 parts by weight of an inorganic compound powder having a particle size of 10 μm or less containing a metal oxide or a metal hydroxide selected from magnesium, titanium and calcium. However, in the former case, there is a problem in the processability of the rubber, and the electric resistance is increased to generate static electricity. On the other hand, the latter has a problem that the obtained rubber composition for a tire tread has insufficient abrasion resistance and breaking characteristics.

【０００６】[0006]

【発明が解決しようとする課題】本発明は、加工性、耐
摩耗性を低下させることなく転がり抵抗性を維持し、ウ
ェットスキッド性能を向上させ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。SUMMARY OF THE INVENTION An object of the present invention is to provide a rubber composition for a tire tread which maintains rolling resistance without deteriorating workability and abrasion resistance and improves wet skid performance. I do.

【０００７】[0007]

【課題を解決するための手段】本発明者は、前記従来の
問題点を解決すべく鋭意検討した結果、ゴム成分に比重
の高い特定の無機化合物を配合することにより、転がり
抵抗性を維持し、ウェットスキッド性能を向上させるタ
イヤトレッド用ゴム組成物を得ることが可能になること
を見出し本発明を完成するにいたった。Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned conventional problems, and as a result, by adding a specific inorganic compound having a high specific gravity to the rubber component, it is possible to maintain the rolling resistance. The present inventors have found that it is possible to obtain a rubber composition for a tire tread that improves wet skid performance, and have completed the present invention.

【０００８】すなわち、請求項１の発明は、天然ゴムお
よび／またはジエン系ゴム１００重量部に対して、タン
グステン粉末、亜鉛粉末、ジルコニウム粉末、ジルコニ
ウムシリケイト、ジルコン、硫酸バリウム粉末、亜鉛華
および酸化チタン粉末からなる群より選ばれる少なくと
も１種類以上からなる、比重が３．５以上で平均粒径が
２０μｍ以下の無機化合物粉体５〜３５重量部とカーボ
ンブラック３０〜１１０重量部とを配合したタイヤトレ
ッド用ゴム組成物である。That is, according to the first aspect of the present invention, tungsten powder, zinc powder, zirconium powder, zirconium silicate, zircon, barium sulfate powder, zinc white and titanium oxide are used for 100 parts by weight of natural rubber and / or diene rubber. A tire comprising 5-35 parts by weight of an inorganic compound powder having a specific gravity of 3.5 or more and an average particle size of 20 μm or less, and 30 to 110 parts by weight of carbon black, comprising at least one kind selected from the group consisting of powders. It is a rubber composition for a tread.

【０００９】請求項２の発明は、前記カーボンブラック
が、窒素吸着比表面積が７０ｍ2／ｇ以上で、かつＤＢ
Ｐ吸油量が９０ｍｌ／１００ｇ以上のカーボンブラック
である請求項１記載のタイヤトレッド用ゴム組成物であ
る。According to a second aspect of the present invention, the carbon black has a nitrogen adsorption specific surface area of 70 m 2 / g or more and a DB
The rubber composition for a tire tread according to claim 1, wherein the rubber composition is a carbon black having a P oil absorption of 90 ml / 100 g or more.

【００１０】[0010]

【発明の実施の形態】本発明のゴム成分は、天然ゴムお
よび／またはジエン系ゴムである。ジエン系ゴムとして
は、たとえば、スチレンブタジエンゴム、ポリブタジエ
ンゴム、ポリイソプレンゴムなどがあり、これらの混合
物なども使用することができる。本発明の前記無機化合
物粉体としては、その平均粒径が２０μｍ以下、好まし
くは０．０５〜１０μｍ、さらに好ましくは０．１〜４
μｍであることが望ましい。無機化合物粉体の平均粒径
が２０μｍを超えると摩耗性能、カットチッピング性能
が低下し、好ましくない。また、無機化合物粉体につい
ては、その比重が３．５以上であり、好ましくは４〜２
０、さらに好ましくは７〜２０である。比重が３．５よ
り小さいとゴム中に占める無機化合物粉体の体積が多く
なり耐摩耗性が劣る。BEST MODE FOR CARRYING OUT THE INVENTION The rubber component of the present invention is a natural rubber and / or a diene rubber. Examples of the diene rubber include styrene butadiene rubber, polybutadiene rubber, and polyisoprene rubber, and a mixture thereof can also be used. The inorganic compound powder of the present invention has an average particle diameter of 20 μm or less, preferably 0.05 to 10 μm, more preferably 0.1 to 4 μm.
μm is desirable. If the average particle size of the inorganic compound powder exceeds 20 μm, the wear performance and cut chipping performance decrease, which is not preferable. Further, the specific gravity of the inorganic compound powder is 3.5 or more, and preferably 4 to 2
0, more preferably 7 to 20. When the specific gravity is smaller than 3.5, the volume of the inorganic compound powder occupying in the rubber increases, and the wear resistance is poor.

【００１１】無機化合物粉体として好ましいものは、タ
ングステン粉末、亜鉛粉末、ジルコニウム粉末、ジルコ
ニウムシリケイト、ジルコン、硫酸バリウム粉末、亜鉛
華、酸化亜鉛粉末、酸化チタン粉末などである。これら
は、１種または２種以上の混合物として使用することが
できる。Preferred examples of the inorganic compound powder include tungsten powder, zinc powder, zirconium powder, zirconium silicate, zircon, barium sulfate powder, zinc white, zinc oxide powder, and titanium oxide powder. These can be used as one kind or a mixture of two or more kinds.

【００１２】無機化合物粉体の配合量は、天然ゴムおよ
び／またはジエン系ゴム（以下、「ゴム成分」という）
１００重量部に対して５〜３５重量部であり、好ましく
は５〜２５重量部である。無機化合物粉体の配合量が５
重量部未満ではウェットスキッド性能が不充分で、３５
重量部を超えると耐摩耗性が低下する。The amount of the inorganic compound powder to be compounded is determined by the natural rubber and / or diene rubber (hereinafter referred to as "rubber component").
It is 5 to 35 parts by weight, preferably 5 to 25 parts by weight, per 100 parts by weight. 5 inorganic compound powders
If the amount is less than 35 parts by weight, the wet skid performance is insufficient.
Exceeding the parts by weight lowers the wear resistance.

【００１３】本発明のカーボンブラックとしては、窒素
吸着比表面積７０ｍ2／ｇ以上、好ましくは１００〜２
００ｍ2／ｇであり、かつＤＢＰ吸油量９０ｍｌ／１０
０ｇ以上、好ましくは１００〜１６９ｍｌ／１００ｇの
ものである。ＤＢＰ吸油量の測定は、ＪＩＳ Ｋ６２２
１ 吸油量Ａ法による。The carbon black of the present invention has a nitrogen adsorption specific surface area of 70 m 2 / g or more, preferably 100 to 2 m 2 / g.
00m 2 / g and DBP oil absorption 90 ml / 10
It is 0 g or more, preferably 100 to 169 ml / 100 g. The measurement of DBP oil absorption is based on JIS K622.
1 Oil absorption A method.

【００１４】窒素吸着比表面積が７０ｍ2／ｇ未満で
は、無機化合物粉体配合時に充分な耐摩耗性が得られ
ず、またＤＢＰ吸油量が９０ｍｌ／１００ｇ未満では、
同様に無機化合物粉体配合時に充分な耐摩耗性が得られ
ない。If the nitrogen adsorption specific surface area is less than 70 m 2 / g, sufficient abrasion resistance cannot be obtained at the time of blending the inorganic compound powder, and if the DBP oil absorption is less than 90 ml / 100 g,
Similarly, sufficient abrasion resistance cannot be obtained when the inorganic compound powder is blended.

【００１５】カーボンブラックの配合量は、ゴム成分１
００重量部に対して３０〜１１０重量部、好ましくは３
５〜９５重量部、さらに好ましくは４０〜９０重量部で
ある。カーボンブラックが３０重量部未満では耐摩耗性
が低下し、１１０重量部を超えると加工性が低下する。The compounding amount of carbon black is as follows:
30 to 110 parts by weight, preferably 3 parts by weight, per 100 parts by weight
It is 5 to 95 parts by weight, more preferably 40 to 90 parts by weight. If the amount of carbon black is less than 30 parts by weight, the abrasion resistance decreases, and if it exceeds 110 parts by weight, the processability decreases.

【００１６】本発明のタイヤトレッド用ゴム組成物は、
前記ゴム成分、無機化合物粉体、カーボンブラックを通
常の加工装置、たとえば、ロール、バンバリーミキサ
ー、ニーダーなどにより混練することにより得られる。
また、本発明のタイヤトレッド用ゴム組成物において
は、前記成分のほかに通常ゴム配合剤として使用される
配合剤、たとえば、プロセスオイル、加硫剤、老化防止
剤などを適宜配合することができる。The rubber composition for a tire tread of the present invention comprises:
It can be obtained by kneading the rubber component, inorganic compound powder, and carbon black with a usual processing device, for example, a roll, a Banbury mixer, a kneader, or the like.
In the rubber composition for a tire tread of the present invention, a compounding agent usually used as a rubber compounding agent, for example, a process oil, a vulcanizing agent, an antioxidant, and the like can be appropriately compounded in addition to the above components. .

【００１７】[0017]

【実施例】次に、実施例および比較例により本発明を具
体的に説明するが、本発明は、これら実施例に限定され
るものではない。なお、実施例および比較例では、以下
の各原料を用いた。Next, the present invention will be described in detail with reference to examples and comparative examples, but the present invention is not limited to these examples. In the examples and comparative examples, the following materials were used.

【００１８】 タングステン粉末：東京タングステン(株)製 Ｃ５０Ｈ 平均粒径 ３μｍ 比重 １９．３ 亜鉛粉末Ａ：東邦亜鉛(株)製 ＡＮ−３２５ 平均粒径 １８μｍ 比重 ７．１ 亜鉛粉末Ｂ：東邦亜鉛(株)製 ＡＮ−８０ 平均粒径 ８０μｍ 比重 ７．１ シリカ：デグッサ社製 ウルトラシルＶＮ３ 水酸化アルミニウム：住友化学(株)製 ＣＬ３０１ 平均粒径 １．４μｍ 比重 ２．４ Ｎ３５１：カーボンブラック 三菱化学(株)製 ＤＢＰ吸油量 １２６ｍｌ／１００ｇ 窒素吸着比表面積 ８４ｍ2／ｇ Ｎ３２６：カーボンブラック 三菱化学(株)製 ＤＢＰ吸油量 ７４ｍｌ／１００ｇ 窒素吸着比表面積 ８４ｍ2／ｇTungsten powder: C50H made by Tokyo Tungsten Co., Ltd. Average particle size 3 μm Specific gravity 19.3 Zinc powder A: Made by Toho Zinc Co., Ltd. AN-325 Average particle size 18 μm Specific gravity 7.1 Zinc powder B: Toho Zinc Co., Ltd. AN-80 manufactured by Degussa Ultrasil VN3 Aluminum hydroxide: Sumitomo Chemical Co., Ltd. CL301 Average particle size: 1.4 μm Specific gravity 2.4 N351: Carbon black Mitsubishi Chemical Corporation ) DBP oil absorption 126 ml / 100 g Nitrogen adsorption specific surface area 84 m 2 / g N326: Carbon black DBP oil absorption 74 ml / 100 g manufactured by Mitsubishi Chemical Corporation Nitrogen adsorption specific surface area 84 m 2 / g

【００１９】また、以下に、実施例および比較例で用い
た評価方法をまとめて示す。The evaluation methods used in the examples and comparative examples are shown below.

【００２０】（ウェットスキッド性能）湿潤アスファル
ト路面にて初速度６４ｋｍ／ｈからの制動距離を求め
た。タイヤサイズは１８５／６５Ｒ１４とし、試験車両
は、国産ＦＦ車を用いた。結果は指数で表し、数字の大
きいほどウェットスキッド性能が良好である。指数は次
の式で求めた。 ウェットスキッド性能＝（各実施例または各比較例の制
動距離）÷（比較例１の制動距離）×１００(Wet skid performance) The braking distance from an initial speed of 64 km / h on a wet asphalt road surface was determined. The tire size was 185 / 65R14, and the test vehicle used was a domestically produced FF vehicle. The result is represented by an index, and the larger the number, the better the wet skid performance. The index was calculated by the following equation. Wet skid performance = (braking distance of each example or each comparative example) / (braking distance of comparative example 1) × 100

【００２１】（耐摩耗性）国産ＦＦ車にトレッドを装着
し舗装路面１．５万キロ走行後、タイヤトレッドが１ｍ
ｍ摩耗する際の走行距離を比較し、比較例１を１００と
して指数表示した。指数が大きい方が、耐摩耗性ならび
に加工性がよいことを示す。(Abrasion resistance) After running a tread on a domestic FF vehicle and traveling 15,000 km on a pavement road, the tire tread becomes 1 m.
The running distances at the time of m wear were compared, and Comparative Example 1 was set to 100 and indicated as an index. A larger index indicates better wear resistance and workability.

【００２２】（転がり抵抗）荷重４．６６キロニュート
ン、内圧２００キロパスカル、速度８０ｋｍ／ｈの条件
で、定法により転がり抵抗を測定し、比較例１を１００
にしたときの指数として表示した。数字が大きいほど転
がり抵抗は低くなる。(Rolling Resistance) The rolling resistance was measured by a conventional method under the conditions of a load of 4.66 kilonewtons, an internal pressure of 200 kilopascals, and a speed of 80 km / h.
It is displayed as an index when it is set to. The higher the number, the lower the rolling resistance.

【００２３】（加工性）ムーニー粘度により加工性を評
価した。ムーニー粘度は、ムーニー粘度計（（株）島津
製作所製）を使用して１３０℃で測定した。試験法はＪ
ＩＳ Ｋ６３００に準拠し、ＭＬ1+4（１分予熱後、４
分稼動後のムーニー粘度値）を求め比較した。(Workability) Workability was evaluated by Mooney viscosity. The Mooney viscosity was measured at 130 ° C. using a Mooney viscometer (manufactured by Shimadzu Corporation). The test method is J
ML 1 + 4 (1 minute preheating, 4
(Mooney viscosity value after minute operation) was determined and compared.

【００２４】実施例１〜２および比較例１〜７ 表１の配合処方（配合単位：重量部）に従い、硫黄およ
び加硫促進剤以外の配合剤と原料ゴムとをバンバリー型
インターナルミキサーで混合し、得られたマスターバッ
チに硫黄と加硫促進剤をオープンロール上で添加し、タ
イヤトレッド用ゴム組成物を調製した。各タイヤトレッ
ド用ゴム組成物について加工性の評価試験を行なった。
ついで、空気入りタイヤのタイヤトレッドに実施例１〜
２および比較例１〜７のゴム組成物を使用して、ウェッ
トスキッド性能、耐摩耗性、転がり抵抗性について評価
試験を行なった。これらの評価試験の結果を表１に示
す。Examples 1 and 2 and Comparative Examples 1 to 7 According to the formulation (blending unit: parts by weight) shown in Table 1, a blending agent other than sulfur and a vulcanization accelerator and a raw rubber were mixed with a Banbury internal mixer. Then, sulfur and a vulcanization accelerator were added to the obtained masterbatch on an open roll to prepare a rubber composition for a tire tread. An evaluation test of workability was performed on each rubber composition for a tire tread.
Then, the tire tread of the pneumatic tires of Examples 1 to
Evaluation tests were performed on the wet skid performance, abrasion resistance, and rolling resistance using the rubber compositions of Comparative Example 2 and Comparative Examples 1 to 7. Table 1 shows the results of these evaluation tests.

【００２５】[0025]

【表１】 [Table 1]

【００２６】実施例１および２は、ゴム成分１００重量
部に対し、本発明範囲の無機化合物粉体およびカーボン
ブラックを配合したタイヤトレッド用ゴム組成物であ
る。これらは、転がり抵抗、加工性、耐摩耗性を維持し
ながらウェットスキッド性能が向上していることがわか
る。コントロールを比較例１とした。Examples 1 and 2 are rubber compositions for tire treads in which the inorganic compound powder of the present invention and carbon black are blended with 100 parts by weight of the rubber component. It can be seen that these have improved wet skid performance while maintaining rolling resistance, workability, and wear resistance. The control was Comparative Example 1.

【００２７】比較例２は、比重が本発明範囲外の無機化
合物粉体を配合した例であり、ウェットスキッド性能は
改善されるものの耐摩耗性が劣った。Comparative Example 2 is an example in which an inorganic compound powder having a specific gravity out of the range of the present invention was blended. The wet skid performance was improved, but the abrasion resistance was poor.

【００２８】比較例３および４は、本発明の範囲外の無
機化合物粉体であるシリカを配合した例であり、シリカ
を多量配合した比較例４は加工性がわるく、シリカを少
量配合した比較例３では、転がり抵抗が低下し加工性も
劣った。Comparative Examples 3 and 4 are examples in which silica, which is an inorganic compound powder outside the scope of the present invention, was blended. Comparative Example 4, in which a large amount of silica was blended, had poor processability, and a comparative example in which a small amount of silica was blended. In Example 3, rolling resistance was reduced and workability was also poor.

【００２９】比較例５は、スチレン量の多いＳＢＲを用
いてゴムのガラス転移温度を上げた例である。この場合
は、耐摩耗性、転がり抵抗が低下した。Comparative Example 5 is an example in which SBR having a high styrene content was used to raise the glass transition temperature of rubber. In this case, the wear resistance and the rolling resistance were reduced.

【００３０】比較例６は、無機化合物粉体の粒径が本発
明の範囲外になる例であるが、耐摩耗性が劣った。Comparative Example 6 is an example in which the particle diameter of the inorganic compound powder is out of the range of the present invention, but the abrasion resistance is inferior.

【００３１】比較例７は、カーボンブラックの規定値
（窒素吸着比表面積および２４Ｍ４ＤＢＰ吸油量）が本
発明の範囲外になるものを用いた例であり耐摩耗性が低
下した。Comparative Example 7 is an example in which the specified values (nitrogen adsorption specific surface area and 24M4DBP oil absorption) of the carbon black are out of the range of the present invention, and the abrasion resistance is reduced.

【００３２】[0032]

【発明の効果】本発明により、加工性、耐摩耗性を低下
させることなく転がり抵抗性を維持し、ウェットスキッ
ド性能を向上させるタイヤトレッド用ゴム組成物が得ら
れる。According to the present invention, there can be obtained a rubber composition for a tire tread which maintains rolling resistance without deteriorating workability and abrasion resistance and improves wet skid performance.

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成１１年６月４日（１９９９．６．４）[Submission date] June 4, 1999 (1999.6.4)

【手続補正１】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】００３１[Correction target item name] 0031

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【００３１】比較例７は、カーボンブラックの規定値
（窒素吸着比表面積およびＤＢＰ吸油量）が本発明の範
囲外になるものを用いた例であり耐摩耗性が低下した。[0031] Comparative Example 7, carbon black specified value (nitrogen adsorption specific surface area and D BP oil absorption) is a and the wear resistance is lowered example using what is outside the scope of the present invention.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｋ 3/30 Ｃ０８Ｋ 3/30 3/34 3/34 Ｃ０８Ｌ 9/00 Ｃ０８Ｌ 9/00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08K 3/30 C08K 3/30 3/34 3/34 C08L 9/00 C08L 9/00

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 天然ゴムおよび／またはジエン系ゴム１
００重量部に対して、タングステン粉末、亜鉛粉末、ジ
ルコニウム粉末、ジルコニウムシリケイト、ジルコン、
硫酸バリウム粉末、亜鉛華および酸化チタン粉末からな
る群より選ばれる少なくとも１種類以上からなる、比重
が３．５以上で平均粒径が２０μｍ以下の無機化合物粉
体５〜３５重量部とカーボンブラック３０〜１１０重量
部とを配合したタイヤトレッド用ゴム組成物。1. Natural rubber and / or diene rubber 1
For 00 parts by weight, tungsten powder, zinc powder, zirconium powder, zirconium silicate, zircon,
5 to 35 parts by weight of an inorganic compound powder having a specific gravity of 3.5 or more and an average particle diameter of 20 μm or less, comprising at least one member selected from the group consisting of barium sulfate powder, zinc white and titanium oxide powder, and carbon black 30 To 110 parts by weight of a rubber composition for a tire tread. 【請求項２】 前記カーボンブラックが、窒素吸着比表
面積が７０ｍ2／ｇ以上で、かつＤＢＰ吸油量が９０ｍ
ｌ／１００ｇ以上のカーボンブラックである請求項１記
載のタイヤトレッド用ゴム組成物。2. The carbon black has a nitrogen adsorption specific surface area of 70 m 2 / g or more and a DBP oil absorption of 90 m 2 / g.
The rubber composition for a tire tread according to claim 1, which is 1/100 g or more of carbon black.
JP13027799A 1999-05-11 1999-05-11 Rubber composition for tire tread Expired - Fee Related JP3444814B2 (en)

Priority Applications (1)

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JP13027799A JP3444814B2 (en) 1999-05-11 1999-05-11 Rubber composition for tire tread

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13027799A JP3444814B2 (en) 1999-05-11 1999-05-11 Rubber composition for tire tread

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JP2000319447A true JP2000319447A (en) 2000-11-21
JP3444814B2 JP3444814B2 (en) 2003-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1323774A1 (en) * 2001-12-19 2003-07-02 Sumitomo Rubber Industries Limited Rubber composition and tire using the same
KR20030092669A (en) * 2002-05-30 2003-12-06 금호타이어 주식회사 Tread rubber composition improved wet traction on wet road
WO2008015923A1 (en) 2006-08-01 2008-02-07 Sumitomo Rubber Industries, Ltd. Rubber composition for tire and tire using the same
US7365119B2 (en) 2003-05-27 2008-04-29 Sumitomo Rubber Industries, Ltd. Rubber composition for tire tread comprising a piezoelectric material
US7999036B2 (en) 2006-07-26 2011-08-16 Sumitomo Rubber Industries, Ltd. Rubber composition and tire using same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1323774A1 (en) * 2001-12-19 2003-07-02 Sumitomo Rubber Industries Limited Rubber composition and tire using the same
KR20030092669A (en) * 2002-05-30 2003-12-06 금호타이어 주식회사 Tread rubber composition improved wet traction on wet road
US7365119B2 (en) 2003-05-27 2008-04-29 Sumitomo Rubber Industries, Ltd. Rubber composition for tire tread comprising a piezoelectric material
US7999036B2 (en) 2006-07-26 2011-08-16 Sumitomo Rubber Industries, Ltd. Rubber composition and tire using same
WO2008015923A1 (en) 2006-08-01 2008-02-07 Sumitomo Rubber Industries, Ltd. Rubber composition for tire and tire using the same
US7956130B2 (en) 2006-08-01 2011-06-07 Sumitomo Rubber Industries, Ltd. Rubber composition for tire and tire using the same

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