JP4343310B2 - Rubber composition and pneumatic tire using the same - Google Patents
Rubber composition and pneumatic tire using the same Download PDFInfo
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- JP4343310B2 JP4343310B2 JP06488399A JP6488399A JP4343310B2 JP 4343310 B2 JP4343310 B2 JP 4343310B2 JP 06488399 A JP06488399 A JP 06488399A JP 6488399 A JP6488399 A JP 6488399A JP 4343310 B2 JP4343310 B2 JP 4343310B2
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- 229920001971 elastomer Polymers 0.000 title claims description 33
- 239000005060 rubber Substances 0.000 title claims description 33
- 239000000203 mixture Substances 0.000 title claims description 23
- 229920005989 resin Polymers 0.000 claims description 31
- 239000011347 resin Substances 0.000 claims description 31
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 16
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 4
- 210000003918 fraction a Anatomy 0.000 claims 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- 229920006026 co-polymeric resin Polymers 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000006229 carbon black Substances 0.000 description 6
- 229920003244 diene elastomer Polymers 0.000 description 6
- 239000002174 Styrene-butadiene Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- MHNNAWXXUZQSNM-UHFFFAOYSA-N 2-methylbut-1-ene Chemical compound CCC(C)=C MHNNAWXXUZQSNM-UHFFFAOYSA-N 0.000 description 4
- -1 diolefin hydrocarbons Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- KPAPHODVWOVUJL-UHFFFAOYSA-N 1-benzofuran;1h-indene Chemical compound C1=CC=C2CC=CC2=C1.C1=CC=C2OC=CC2=C1 KPAPHODVWOVUJL-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229920003049 isoprene rubber Polymers 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical compound CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- VNWOJVJCRAHBJJ-UHFFFAOYSA-N 2-pentylcyclopentan-1-one Chemical compound CCCCCC1CCCC1=O VNWOJVJCRAHBJJ-UHFFFAOYSA-N 0.000 description 1
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 1
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、ゴム組成物及びそれを用いた空気入りタイヤに関し、さらに詳しくは、タイヤに用いた際にトレッド表面温度が低い時にも良好なグリップ性能を発揮し得るゴム組成物及びそれを用いた空気入りタイヤに関する。
【０００２】
【従来の技術】
高速での走行を要求されるタイヤ、特に、サーキット等、舗装路面上で行われるレースに使用されるタイヤのトレッドゴムには、高いグリップ性が要求される。従来、高いグリップ性を得るためには、スチレン成分含有率の高いスチレン−ブタジエン共重合体ゴム（ＳＢＲ）を使用する方法軟化剤及びカーボンブラックを高充填した配合系とする方法、粒子の小さなカーボンブラックを使用する方法、等の方法を取っていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、一般的に、スチレン成分含有率の高いＳＢＲはガラス転移温度が高いので、走行時のタイヤ温度の近辺でゴム組成物の物性の温度依存性が大きくなり、温度変化に対する性能変化が大きくなるという問題点があった。
【０００４】
また、カーボンブラックや軟化剤の配合量を増加したり、粒径の小さいカーボンブラックを使用すると、カーボンブラックの分散に悪影響を及ぼし、耐摩耗性が低下するという問題がある。
【０００５】
さらに、高軟化点樹脂とプロセスオイルの等量置換配合においても置換量が余り多量になると、高軟化点樹脂の影響で、同様に温度依存性が大となり不都合である。
【０００６】
以上の結果を踏まえて、スチレン成分含有率の高いＳＢＲをゴム成分として用いた系において、Ｃ９芳香族系樹脂を主成分とする石油樹脂及び軟化点が４０℃未満のクマロンインデン樹脂の混合物を配合する方法( 特開平５−２１４１７０号) 、粒子径の小さいカーボンブラックとアルキルフェノール系の樹脂を併用する方法( 特開平６−２０００７８号) 、ジエン系のゴム成分に対し、ナフサの熱分解によって得られるＣ５留分とスチレンまたはビニルトルエンの共重合樹脂を配合する方法( 特開平９−３２８５７７号) 等の方法が試みられたが、その効果は未だ不十分であった。
【０００７】
そこで、本発明の目的は、温度依存性を小さくし、かつ高グリップ性を兼ね備えるトレッドゴム組成物を用いた空気入りタイヤを提供することにある。
【０００８】
【課題を解決するための手段】
本発明の構成は以下のとおりとする。
（１）スチレン−ブタジエン共重合体ゴム成分と、ナフサの熱分解によって得られるＣ5留分及びＣ9留分を共重合した、軟化点が５０℃以下の樹脂（Ａ）と、他のＣ 5 留分樹脂（Ｂ）とを配合したスチレン−ブタジエン系ゴム組成物を用いたことを特徴とする空気入りタイヤ。
（２）スチレン−ブタジエン共重合体ゴム成分１００重量部に対し、前記樹脂（Ａ）の配合量が５重量部から１００重量部であることを特徴とする上記（１）に記載の空気入りタイヤ。
（３）スチレン−ブタジエン共重合体ゴム成分１００重量部に対し、前記樹脂（Ｂ）の配合量が５重量部から１００重量部であることを特徴とする上記（１）又は（２）のいずれかに記載の空気入りタイヤ。
【０００９】
本発明のゴム組成物は、ジエン系ゴムに対し、ナフサの熱分解によって得られるＣ5 留分とＣ9 留分の共重合樹脂でかつ軟化点が５０℃以下のもの配合してなることを特徴とする。このようにジエン系ゴムに対し特定の共重合樹脂を配合したため、上記目的の達成が可能となる。
【００１０】
【発明の実施の形態】
本発明で用いるゴム成分としては、ジエン系ゴムが好ましい。ジエン系ゴムとしては、特に限定されるものではなく、例えば、天然ゴム（ＮＲ）、スチレン−ブタジエン共重合体ゴム（ＳＢＲ）、イソプレンゴム（ＩＲ）、ブタジエンゴム（ＢＲ）、クロロプレンゴム（ＣＲ）アクリロニトリルブタジエンゴム（ＮＢＲ）などの一般のジエン系ゴムから適宜選択することができる。なかでもＮＲ、ＢＲ、ＳＢＲを用いることが好ましい。
【００１１】
また、本発明では、ナフサの熱分解によって得られるＣ5 留分とＣ9 留分の共重合樹脂を使用する。このＣ5 留分中には、ペンテン−（１）、ペンテン−（２）、２−メチルブテン−（１）、３−メチルブテン−（１）、２−メチルブテン−（２）等のオレフィン系炭化水素や、２−メチルブタジエン−（１，３）、ペンタジエン−（１，２）、ペンタジエン−（１，３）、３−メチルブタジエン−（１，２）等のジオレフィン系炭化水素等が含まれる。
また、Ｃ9 留分には、ベンゼン、トルエン、キシレン、スチレン、α−メチルスチレン、ペンタジエン−１，２、ペンタジエン−１，３、３−メチルブタジエン−１，２）などのジオレフィン系炭化水素が含まれる。
したがって、上記共重合樹脂は、Ｃ5 留分中に含まれるこれらのオレフィン系炭化水素又はジオレフィン系炭化水素と、Ｃ9 留分との共重合樹脂である。
具体的には、ＳＣＨＩＬＬ ＆ ＳＥＩＬＡＣＨＥＲ社製Ｓｔｒｕｋｔｏｌシリーズの、ＴＳ３０、ＴＳ３０−ＤＬ、ＴＳ３５、ＴＳ３５−ＤＬ等が挙げられる。
【００１２】
本発明で、上記の樹脂と併用する他のＣ5 留分樹脂またはＣ9 留分樹脂は特に限定されず、例えば、イソプレン共重合体樹脂、ジシクロペンタジエン樹脂、クマロンインデン樹脂等を用いることができる。
【００１３】
本発明において、Ｃ5 留分とＣ9 留分とを共重合して得た軟化点が５０℃以下の樹脂を単独で用いる場合は、該樹脂の配合量はゴム１００重量部に対し５重量部から１００重量部であることが好ましく、さらに好ましくは１０重量部から６０重量部である。
【００１４】
この共重合樹脂は、ゴムの軟化剤としても働くため、通常ゴムの軟化剤として使用されるアロマ系油などの替わりに用いられてもよい。１００重量部超の配合量では、加工性を悪化させる可能性があり、また、１重量部未満では十分な効果が得られない。
【００１５】
また、上記の樹脂と、その他のＣ5 留分樹脂またはＣ9 留分樹脂の少なくとも１種とを併用する場合は、樹脂の総配合量が１０重量部から２００重量部であることが好ましく、さらに好ましくは１０重量部から８０重量部である。
【００１６】
樹脂の総配合量が２００重量部を超えると、加工性を悪化させる可能性があり、耐摩耗性にも悪影響を与える。一方、１０重量部未満では樹脂の添加効果が十分に得られない。
【００１７】
本発明のゴム組成物は、蒸気の成分の他にも、カーボンブラック、軟化剤、可塑剤、硫黄などの加硫剤、加硫促進剤、加硫助剤、老化防止剤等、通常ゴム業界で用いられる配合薬品を必要に応じ、適宜用いることができる。
【００１８】
【実施例】
以下に、本発明を実施例に沿って説明するが、本発明は、これらの実施例に限定されるものではない。
【００１９】
樹脂の軟化点の測定
ＪＩＳ Ｋ６２２０ ６．６に準拠して測定した。
【００２０】
ゴム組成物の各種の物性は、以下の方法で測定した。
（１）温度依存性
粘弾性測定スペクトロメータ（レオメトリックス社製) を用い、−８０℃から８０℃までのｔａｎδを測定し、その最大値と最小値との差をΔｔａｎδとした。データは、比較例１におけるΔｔａｎδの逆数を１００とし、各ゴム組成物のΔｔａｎδの逆数を指数で表わした。数値が大きい方が、Δｔａｎδが小さく、ゴム組成物の温度依存性が小さい。
【００２１】
（２）グリップ性
タイヤのグリップ性は、サーキットを実走行することで評価した。
初期グリップ性は、走行開始２周目までの周回タイムの平均値の逆数を、また、グリップ性能は、１０周目から２０周目までの周回タイムの平均値の逆数を、それぞれ、コントロール（比較例１）の値を１００として、指数表示した物で、どちらも、数値が大きい方がグリップ性能が高いことを示す。
【００２２】
ゴム組成物の調製
表１の基本配合、及び、表２または表３の配合に従い、各ゴム組成物を調製した。
【００２３】
【表１】
＊２：Ｎ１１０、東海カーボン（株） 商標：シースト９
＊３：アロマティックオイル（伸展油として３７. ５重量部、配合油として２２．５重量部）
＊４：ジベンゾチアジルジスルフィド、大内新興化学工業（株）製 商標：ノクセラーＤＭ
＊５：Ｎ−１，３−ジメチルブチル−Ｎ’−フェニル−ｐ−フェニレンジアミン、大内新興化学工業（株）製 商標：ノクラック６Ｃ
＊６：Ｃ５、Ｃ９共重合樹脂；Ｓｃｈｉｌｌ＆Ｓｅｉｌａｃｈｅｒ社製 商標：ＳｔｒｕｋｔｏｌＴＳ３０（軟化点３９〜４５℃：メーカー発表値）
＊７：日本ゼオン製 商標：ＱＵＩＮＴＯＮＥ１３４５（軟化点１４５℃：メーカー発表値）
【００２４】
【表２】
得られたゴム組成物につき温度依存性を測定し評価した。この結果を表２に示す。
【００２６】
次に、各ゴム組成物をトレッドに用いてサイズ２０５／５０Ｒ１６のタイヤを作成し、初期グリップ性及びグリップ性を測定した。結果を表２に示す。
【００２７】
比較例１及び実施例、実施例１〜３から、本発明にかかる樹脂を配合することにより、ゴム組成物の温度依存性、タイヤの初期グリップ性、グリップ性のいずれを取っても向上することが判る。
【００２８】
また、樹脂の総配合量中の本発明にかかる樹脂の割合を増やしていくことにより、グリップ性能に影響を与えることなくｔａｎδの温度依存性を低減できることが判る。
【００２９】
【発明の効果】
以上説明したように、本発明によれば、ｔａｎδの温度依存性が小さく、グリップ性能が改良されたゴム組成物を提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rubber composition and a pneumatic tire using the rubber composition, and more specifically, a rubber composition that can exhibit good grip performance even when the tread surface temperature is low when used in a tire, and the rubber composition. Related to pneumatic tires.
[0002]
[Prior art]
Tires that are required to travel at high speed, particularly tread rubber of tires used in races performed on paved road surfaces such as circuits, require high grip. Conventionally, in order to obtain high grip properties, a method using a styrene-butadiene copolymer rubber (SBR) having a high styrene component content, a method using a softening agent and a high-filled carbon black, carbon having small particles The method of using black etc. was taken.
[0003]
[Problems to be solved by the invention]
However, in general, SBR having a high styrene component content has a high glass transition temperature, so that the temperature dependence of the physical properties of the rubber composition increases in the vicinity of the tire temperature during running, and the performance change with respect to the temperature change increases. There was a problem.
[0004]
Further, when the blending amount of carbon black or softener is increased, or when carbon black having a small particle size is used, there is a problem that the dispersion of carbon black is adversely affected and wear resistance is lowered.
[0005]
Further, even in the case where the equivalent amount of the high softening point resin and the process oil is replaced, if the replacement amount is too large, the temperature dependency is similarly increased due to the influence of the high softening point resin, which is inconvenient.
[0006]
Based on the above results, in a system using SBR having a high styrene component content as a rubber component, a mixture of a petroleum resin mainly composed of a C9 aromatic resin and a coumarone indene resin having a softening point of less than 40 ° C. A method of blending (Japanese Patent Laid-Open No. 5-214170), a method of using carbon black having a small particle size and an alkylphenol-based resin in combination (Japanese Patent Laid-Open No. 6-200078), obtained by thermal decomposition of naphtha against a diene rubber component. A method such as a method of blending a C5 fraction and a copolymer resin of styrene or vinyltoluene (Japanese Patent Laid-Open No. 9-328577) has been tried, but the effect is still insufficient.
[0007]
Accordingly, an object of the present invention is to provide a pneumatic tire using a tread rubber composition that has a low temperature dependency and also has a high grip property.
[0008]
[Means for Solving the Problems]
The configuration of the present invention is as follows.
(1) Resin (A) having a softening point of 50 ° C. or lower, which is obtained by copolymerizing a styrene-butadiene copolymer rubber component, a C 5 fraction and a C 9 fraction obtained by thermal decomposition of naphtha, and other C A pneumatic tire using a styrene-butadiene rubber composition blended with a 5- fraction resin (B) .
(2) The pneumatic tire as described in (1) above, wherein the amount of the resin (A) is 5 to 100 parts by weight per 100 parts by weight of the styrene-butadiene copolymer rubber component .
(3) Either (1) or (2) above , wherein the amount of the resin (B) is 5 to 100 parts by weight per 100 parts by weight of the styrene-butadiene copolymer rubber component The pneumatic tire according to Crab .
[0009]
The rubber composition of the present invention is obtained by blending a diene rubber with a copolymer resin of C 5 fraction and C 9 fraction obtained by thermal decomposition of naphtha and having a softening point of 50 ° C. or less. Features. Since the specific copolymer resin is blended with the diene rubber as described above, the above object can be achieved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The rubber component used in the present invention is preferably a diene rubber. The diene rubber is not particularly limited. For example, natural rubber (NR), styrene-butadiene copolymer rubber (SBR), isoprene rubber (IR), butadiene rubber (BR), chloroprene rubber (CR). It can be appropriately selected from general diene rubbers such as acrylonitrile butadiene rubber (NBR). Of these, NR, BR, and SBR are preferably used.
[0011]
Further, the present invention uses the C 5 fraction and C 9 fraction copolymer resin obtained by thermal cracking of naphtha. This C 5 distillate, pentene - (1), pentene - (2), 2-methylbutene - (1), 3-methylbutene - (1) 2-methylbutene - (2) an olefinic hydrocarbon such as And diolefin hydrocarbons such as 2-methylbutadiene- (1,3), pentadiene- (1,2), pentadiene- (1,3), and 3-methylbutadiene- (1,2). .
In addition, diolefin hydrocarbons such as benzene, toluene, xylene, styrene, α-methylstyrene, pentadiene-1,2, pentadiene-1,3,3-methylbutadiene-1,2) are included in the C 9 fraction. Is included.
Thus, the copolymer resin is a copolymer resin with these olefinic hydrocarbon or diolefin hydrocarbon contained in C 5 fraction, a C 9 fraction.
Specifically, TS30, TS30-DL, TS35, TS35-DL, etc. of the STRILL series produced by SCHILL & SEILACHER are listed.
[0012]
In the present invention, the other C 5 fraction resin or C 9 fraction resin used in combination with the above resin is not particularly limited, and for example, an isoprene copolymer resin, dicyclopentadiene resin, coumarone indene resin or the like is used. Can do.
[0013]
In the present invention, when a resin having a softening point of 50 ° C. or less obtained by copolymerizing a C 5 fraction and a C 9 fraction is used alone, the blending amount of the resin is 5% by weight with respect to 100 parts by weight of rubber. Part to 100 parts by weight, more preferably 10 parts to 60 parts by weight.
[0014]
Since this copolymer resin also acts as a rubber softener, it may be used in place of an aroma oil or the like normally used as a rubber softener. If the amount exceeds 100 parts by weight, the processability may be deteriorated, and if it is less than 1 part by weight, sufficient effects cannot be obtained.
[0015]
In the case where the above resin is used in combination with at least one other C 5 fraction resin or C 9 fraction resin, the total amount of the resin is preferably 10 to 200 parts by weight, More preferably, it is 10 to 80 parts by weight.
[0016]
When the total amount of the resin exceeds 200 parts by weight, the workability may be deteriorated and the wear resistance is also adversely affected. On the other hand, if it is less than 10 parts by weight, the effect of adding the resin cannot be sufficiently obtained.
[0017]
In addition to steam components, the rubber composition of the present invention includes carbon black, softeners, plasticizers, vulcanizing agents such as sulfur, vulcanization accelerators, vulcanization aids, anti-aging agents, etc. The compounding chemicals used in the above can be used as needed.
[0018]
【Example】
The present invention will be described below with reference to examples, but the present invention is not limited to these examples.
[0019]
Measurement of softening point of resin It was measured according to JIS K6220 6.6.
[0020]
Various physical properties of the rubber composition were measured by the following methods.
(1) Using a temperature-dependent viscoelasticity measurement spectrometer (manufactured by Rheometrics), tan δ from −80 ° C. to 80 ° C. was measured, and the difference between the maximum value and the minimum value was taken as Δtan δ. In the data, the inverse of Δtan δ in Comparative Example 1 was defined as 100, and the inverse of Δtan δ of each rubber composition was expressed as an index. The larger the numerical value, the smaller the Δtanδ, and the smaller the temperature dependency of the rubber composition.
[0021]
(2) Grip The grip of the tire was evaluated by actually running on the circuit.
For the initial grip performance, the reciprocal of the average value of the lap times until the second lap of the start of the run, and for the grip performance, the reciprocal of the average value of the lap times from the 10th lap to the 20th lap is controlled (comparison). In Example 1, the value is 100, and both are indexed. The larger the value, the higher the grip performance.
[0022]
Preparation of Rubber Composition Each rubber composition was prepared according to the basic composition of Table 1 and the composition of Table 2 or Table 3.
[0023]
[Table 1]
* 2: N110, Tokai Carbon Co., Ltd. Trademark: Seast 9
* 3: Aromatic oil (37.5 parts by weight as extension oil, 22.5 parts by weight as compounding oil)
* 4: Dibenzothiazyl disulfide, manufactured by Ouchi Shinsei Chemical Co., Ltd. Trademark: Noxeller DM
* 5: N-1,3-dimethylbutyl-N′-phenyl-p-phenylenediamine, manufactured by Ouchi Shinsei Chemical Co., Ltd. Trademark: NOCRACK 6C
* 6: C5, C9 copolymer resin; manufactured by Schill & Seilacher, Inc. Trademark: Struktol TS30 (softening point 39-45 ° C: manufacturer's announced value)
* 7: Made by Nippon Zeon Trademark: QUINTONE 1345 (softening point 145 ° C: manufacturer's announced value)
[0024]
[Table 2]
The obtained rubber composition was measured and evaluated for temperature dependency. The results are shown in Table 2.
[0026]
Next, tires of size 205 / 50R16 were prepared using each rubber composition as a tread, and initial grip properties and grip properties were measured. The results are shown in Table 2.
[0027]
By adding the resin according to the present invention from Comparative Example 1 and Examples and Examples 1 to 3, the temperature dependency of the rubber composition, the initial grip property of the tire, and the grip property can be improved. I understand.
[0028]
It can also be seen that by increasing the proportion of the resin according to the present invention in the total resin content, the temperature dependence of tan δ can be reduced without affecting the grip performance.
[0029]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a rubber composition having a small temperature dependency of tan δ and an improved grip performance.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06488399A JP4343310B2 (en) | 1999-03-11 | 1999-03-11 | Rubber composition and pneumatic tire using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06488399A JP4343310B2 (en) | 1999-03-11 | 1999-03-11 | Rubber composition and pneumatic tire using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000256515A JP2000256515A (en) | 2000-09-19 |
| JP4343310B2 true JP4343310B2 (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06488399A Expired - Lifetime JP4343310B2 (en) | 1999-03-11 | 1999-03-11 | Rubber composition and pneumatic tire using the same |
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| Country | Link |
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| JP (1) | JP4343310B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6221953B1 (en) * | 1999-08-10 | 2001-04-24 | The Goodyear Tire & Rubber Company | Tire with tread which contains spatially-defined resins |
| JP5116247B2 (en) * | 2006-03-29 | 2013-01-09 | 株式会社ブリヂストン | Rubber composition for tread and tire using the same |
| CN101910278B (en) | 2008-01-18 | 2013-04-03 | 埃克森美孚化学专利公司 | Elastomeric compositions comprising hydrocarbon polymer additives |
| US8653195B2 (en) | 2010-10-13 | 2014-02-18 | Exxonmobil Chemical Patents Inc. | Hydrocarbon polymer modifiers for elastomeric compositions |
| FR2968006B1 (en) | 2010-11-26 | 2012-12-21 | Michelin Soc Tech | TIRE TREAD TIRE |
| JP6627294B2 (en) * | 2014-09-08 | 2020-01-08 | 住友ゴム工業株式会社 | Pneumatic tire |
| US10947368B2 (en) * | 2019-03-04 | 2021-03-16 | The Goodyear Tire & Rubber Company | Pneumatic tire |
-
1999
- 1999-03-11 JP JP06488399A patent/JP4343310B2/en not_active Expired - Lifetime
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| JP2000256515A (en) | 2000-09-19 |
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