JP2005350595A - Pneumatic tire - Google Patents
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- JP2005350595A JP2005350595A JP2004174013A JP2004174013A JP2005350595A JP 2005350595 A JP2005350595 A JP 2005350595A JP 2004174013 A JP2004174013 A JP 2004174013A JP 2004174013 A JP2004174013 A JP 2004174013A JP 2005350595 A JP2005350595 A JP 2005350595A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229920001971 elastomer Polymers 0.000 claims abstract description 41
- 239000005060 rubber Substances 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 36
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 23
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 22
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 22
- 239000006229 carbon black Substances 0.000 claims abstract description 18
- 238000004073 vulcanization Methods 0.000 claims abstract description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011593 sulfur Substances 0.000 claims abstract description 14
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 14
- 229920001194 natural rubber Polymers 0.000 claims abstract description 12
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 claims abstract description 7
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 6
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 6
- 238000013329 compounding Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 16
- 239000000446 fuel Substances 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 10
- 230000020169 heat generation Effects 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- CMAUJSNXENPPOF-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-n-cyclohexylcyclohexanamine Chemical compound C1CCCCC1N(C1CCCCC1)SC1=NC2=CC=CC=C2S1 CMAUJSNXENPPOF-UHFFFAOYSA-N 0.000 description 1
- ILSQBBRAYMWZLQ-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-n-propan-2-ylpropan-2-amine Chemical compound C1=CC=C2SC(SN(C(C)C)C(C)C)=NC2=C1 ILSQBBRAYMWZLQ-UHFFFAOYSA-N 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- -1 silica compound Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
Abstract
Description
本発明は、空気入りタイヤに関し、更に詳細には、加工性を維持しつつ、耐カット／疲労性と低燃費化を高次元にバランスさせたシリカ配合系サイドウォールゴム組成物を用いた空気入りタイヤに関する。 The present invention relates to a pneumatic tire. More specifically, the present invention relates to a pneumatic tire using a silica-containing sidewall rubber composition that balances cut resistance / fatigue resistance and fuel efficiency at a high level while maintaining processability. Regarding tires.
近年、トラック、バス等の重荷重用タイヤにおいて、省メンテナンスおよび低燃費に対するタイヤへの要求が高まりつつある。タイヤの低燃費化においては、ボリュームが多く路面に接地するトレッド部の転動抵抗を低下させることが最も有効であるが、重荷重用タイヤトレッドの重要特性である耐摩耗性が低下してしまうことから、サイドウォールコンパウンドの低発熱化についての検討も行なわれている。先行技術として、特許文献１では、特定のカーボンブラックとシリカのブレンドを使用することにより低転がり性と耐摩耗性を改良する方法が提案されており、また、特許文献２では、特定のポリマー（ＤＭＤＴ−ＥＰＴ）を使用することで耐疲労性と低燃費性を改良する方法が提案されているが、加工性を維持しつつ、耐カット／疲労性と低燃費化を高次元にバランスさせるには到っていない。 In recent years, in heavy-duty tires such as trucks and buses, there is an increasing demand for tires for saving maintenance and low fuel consumption. In order to reduce the fuel consumption of tires, it is most effective to reduce the rolling resistance of the tread part that has a large volume and touches the road surface, but the wear resistance, which is an important characteristic of heavy-duty tire treads, is reduced. Therefore, studies have been conducted on reducing the heat generation of the sidewall compound. As a prior art, Patent Document 1 proposes a method for improving low rolling properties and wear resistance by using a specific carbon black and silica blend, and Patent Document 2 discloses a specific polymer ( DMDT-EPT) has been proposed to improve fatigue resistance and fuel efficiency, but to maintain a high level of balance between cut resistance / fatigue resistance and fuel efficiency while maintaining processability. Is not reached.
よって、本発明では、加工性を維持した特定組成のシリカ配合系からなるサイドウォールゴム組成物を採用することによって、操縦安定性、耐老化性、耐カット性、発熱性および耐疲労性を高次元にバランスさせた空気入りタイヤを提供することを目的とする。 Therefore, in the present invention, by adopting a sidewall rubber composition composed of a silica-containing system having a specific composition that maintains processability, handling stability, aging resistance, cut resistance, heat resistance and fatigue resistance are improved. An object is to provide a pneumatic tire balanced in dimensions.
本発明によれば、（Ａ）天然ゴムおよび／またはポリイソプレンゴム２０〜６０重量部と、数平均分子量６０００〜６００００の低分子量ブタジエンゴム５〜４０重量％および数平均分子量５０００００以上の高分子量ブタジエンゴム６０〜９５重量％が予めブレンドされたブタジエンゴム総量４０〜８０重量部とからなるゴム１００重量部、（Ｂ）シリカ１０〜４０重量部とカーボンブラックとの総量３０〜６０重量部、（Ｃ）スルフェンアミド系加硫促進剤、および（Ｄ）硫黄１.３〜１.８重量部を配合してなり、加硫促進剤／硫黄の配合比が０.５〜０.７であることを特徴とするゴム組成物をサイドウォールとして用いた空気入りタイヤが提供される。 According to the present invention, (A) 20-60 parts by weight of natural rubber and / or polyisoprene rubber, 5-40% by weight of low molecular weight butadiene rubber having a number average molecular weight of 6000-60000, and high molecular weight butadiene having a number average molecular weight of 500,000 or more 100 parts by weight of rubber composed of 40 to 80 parts by weight of butadiene rubber preliminarily blended with 60 to 95% by weight of rubber, (B) 30 to 60 parts by weight of total of 10 to 40 parts by weight of silica and carbon black, (C ) Sulfenamide vulcanization accelerator and (D) 1.3 to 1.8 parts by weight of sulfur are blended, and the blending ratio of vulcanization accelerator / sulfur is 0.5 to 0.7. A pneumatic tire using the rubber composition characterized by the above as a sidewall is provided.
本発明では、シリカ配合系ゴム組成物におけるゴム成分に、天然ゴムおよび／またはポリイソプレンゴムと併用して、特定配合比の低分子量ブタジエンゴムおよび高分子量ブタジエンゴムを予めブレンドされたブタジエンゴムを採用し、同時に、スルフェンアミド系加硫促進剤と硫黄加硫剤を特定配合比で配合する加硫系を用いることによって、加工性を維持しつつ、操縦安定性、耐老化性、耐カット性、発熱性および耐疲労性を高次元にバランスさせた、タイヤサイドウォールに好適なゴム組成物が得られることを見出したものである。 In the present invention, the rubber component in the silica compounded rubber composition is used in combination with natural rubber and / or polyisoprene rubber and butadiene rubber pre-blended with a low molecular weight butadiene rubber and a high molecular weight butadiene rubber having a specific compounding ratio. At the same time, by using a vulcanization system that combines a sulfenamide-based vulcanization accelerator and a sulfur vulcanizing agent at a specific mixing ratio, while maintaining processability, handling stability, aging resistance, cut resistance The present inventors have found that a rubber composition suitable for a tire sidewall can be obtained in which exothermic properties and fatigue resistance are balanced in a high dimension.
本発明で使用するタイヤサイドウォールゴム組成物におけるゴム成分としては、天然ゴムおよび／またはポリイソプレンゴム２０〜６０重量部、好ましくは２５〜４５重量部と、数平均分子量６０００〜６００００の低分子量ブタジエンゴム５〜４０重量％、好ましくは１０〜２０重量％および数平均分子量５０００００以上、好ましくは５５００００〜１００００００の高分子量ブタジエンゴム６０〜９５重量％が予めブレンドされたブタジエンゴム総量４０〜８０重量部、好ましくは５５〜７５重量部とからなるゴム１００重量部が配合される。当該天然ゴムおよび／またはポリイソプレンゴムに対する、所定配合比の低分子量ブタジエンゴムと高分子量ブタジエンゴムとが予めブレンドされたブタジエンゴム総量の配合量が４０重量部未満では、耐クラック性が悪化するなどの点で満足するゴム組成物が得られず、また、その配合量が８０重量部を超えると、耐カット性が悪化するので好ましくない。 The rubber component in the tire sidewall rubber composition used in the present invention is a low molecular weight butadiene having a number average molecular weight of 6000 to 60000 and a natural rubber and / or polyisoprene rubber of 20 to 60 parts by weight, preferably 25 to 45 parts by weight. 40 to 80 parts by weight of butadiene rubber pre-blended with 5 to 40% by weight of rubber, preferably 10 to 20% by weight and high molecular weight butadiene rubber having a number average molecular weight of 500,000 or more, preferably 550000 to 1,000,000, Preferably, 100 parts by weight of rubber composed of 55 to 75 parts by weight is blended. When the blending amount of the total amount of butadiene rubber in which a low molecular weight butadiene rubber and a high molecular weight butadiene rubber having a predetermined blending ratio with respect to the natural rubber and / or polyisoprene rubber are blended in advance is less than 40 parts by weight, crack resistance deteriorates. If a rubber composition satisfying this point is not obtained and the blending amount exceeds 80 parts by weight, the cut resistance deteriorates, which is not preferable.
本発明で使用するタイヤサイドウォールゴム組成物には、上記ゴム１００重量部に対し、シリカ１０〜４０重量部、好ましくは１５〜３０重量部とカーボンブラックとの総量３０〜６０重量部、好ましくは３５〜４５重量部が配合される。この総配合量が３０部未満ではゴムの強度が不足するので好ましくなく、逆に６０重量部を超えるとゴム組成物の破断伸びが不足して耐カット性が低下するので好ましくない。また、シリカ／カーボンブラックの配合比は、これを１以上となるように配合することが好ましい。この配合比が１未満であると、当該ゴム組成物の発熱が悪化してしまう。 In the tire sidewall rubber composition used in the present invention, 10 to 40 parts by weight of silica, preferably 15 to 30 parts by weight and a total amount of carbon black of 30 to 60 parts by weight, preferably 100 parts by weight of the rubber. 35 to 45 parts by weight are blended. If the total blending amount is less than 30 parts, the strength of the rubber is insufficient, which is not preferable. On the other hand, if it exceeds 60 parts by weight, the elongation at break of the rubber composition is insufficient and the cut resistance is deteriorated. Moreover, it is preferable to mix | blend this so that the compounding ratio of silica / carbon black may become 1 or more. When this compounding ratio is less than 1, the heat generation of the rubber composition is deteriorated.
本発明において使用するシリカとしては、一般タイヤ用などに用いられる任意のシリカ、例えば、天然シリカ、合成シリカ、より具体的には乾燥シリカ、湿式シリカなどとすることができる。一方、カーボンブラックについては、従来タイヤ用その他に使用されている任意のカーボンブラックを用いることができるが、本発明では、特にその窒素吸着比表面積（Ｎ2ＳＡ）が７０〜１４０ｍ2／ｇのものを使用することが好ましい。このＮ2ＳＡが７０ｍ2／ｇ未満であると、耐クラック性が不十分となるので好ましくない。 The silica used in the present invention may be any silica used for general tires, for example, natural silica, synthetic silica, more specifically dry silica, wet silica and the like. On the other hand, as for carbon black, any carbon black conventionally used for tires and others can be used. In the present invention, the nitrogen adsorption specific surface area (N 2 SA) is particularly 70 to 140 m 2 / g. It is preferable to use one. If this N 2 SA is less than 70 m 2 / g, the crack resistance becomes insufficient, such being undesirable.
本発明で使用するタイヤサイドウォールゴム組成物には、更に、スルフェンアミド系加硫促進剤と硫黄１.３〜１.８重量部が配合され、その際、このスルフェンアミド加硫促進剤／硫黄の配合比を０.５〜０.７の範囲に選定することが必要である。この加硫系配合比が０.５未満であると、発熱が悪化してしまうため好ましくない。逆に０.７を超えると、耐クラック性が悪化するので好ましくない。 The tire sidewall rubber composition used in the present invention further contains a sulfenamide vulcanization accelerator and 1.3 to 1.8 parts by weight of sulfur. At this time, the sulfenamide vulcanization accelerator It is necessary to select the sulfur / sulfur compounding ratio in the range of 0.5 to 0.7. If this vulcanization ratio is less than 0.5, it is not preferable because heat generation deteriorates. Conversely, if it exceeds 0.7, the crack resistance deteriorates, which is not preferable.
本発明で使用するスルフェンアミド系加硫促進剤としては、Ｎ−シクロヘキシル−２−ベンゾチアゾリルスルフェンアミド、Ｎ−ｔ−ブチル−２−ベンゾチアゾリルスルフェンアミド、Ｎ−オキシジエチレン−２−ベンゾチアゾリル−スルフェンアミド、Ｎ,Ｎ−ジイソプロピル−２−ベンゾチアゾリル−スルフェンアミド、Ｎ,Ｎ−ジシクロヘキシル−２−ベンゾチアゾリル−スルフェンアミドなどを挙げることができる。 Examples of the sulfenamide vulcanization accelerator used in the present invention include N-cyclohexyl-2-benzothiazolylsulfenamide, Nt-butyl-2-benzothiazolylsulfenamide, N-oxydiethylene-2. -Benzothiazolyl-sulfenamide, N, N-diisopropyl-2-benzothiazolyl-sulfenamide, N, N-dicyclohexyl-2-benzothiazolyl-sulfenamide and the like.
本発明で使用するタイヤサイドウォールゴム組成物には、前記した必須成分に加えて、シランカップリング剤、各種オイル、老化防止剤、充填剤、可塑剤などの一般タイヤ用の各種配合剤を配合することができ、かかる配合剤は、上記必須成分と共に公知のゴム用混練機、例えば、ロール、バンバリーミキサー、ニーダー等で混練してゴム組成物とし、これをタイヤサイドウォールゴム組成物として供給、使用することができる。これら配合剤の添加量も、本発明の目的に反しない限り、従来の一般的な配合量とすることができる。 The tire sidewall rubber composition used in the present invention contains various compounding agents for general tires such as silane coupling agents, various oils, anti-aging agents, fillers, and plasticizers in addition to the above-described essential components. Such a compounding agent is kneaded with a known rubber kneader, for example, a roll, a Banbury mixer, a kneader, etc. together with the above essential ingredients to provide a rubber composition, which is supplied as a tire sidewall rubber composition, Can be used. The addition amount of these compounding agents can also be made into the conventional general compounding amount, unless it is contrary to the objective of this invention.
以下、標準例、実施例および比較例によって本発明を更に説明するが、本発明の範囲をこれら実施例に限定するものでないことは言うまでもない。 Hereinafter, the present invention will be further described with reference to standard examples, examples and comparative examples, but it goes without saying that the scope of the present invention is not limited to these examples.
試験サンプルの作製
以下の表１に示す配合における加硫促進剤と硫黄を除く成分を１.８Ｌの密閉型ミキサーで５分間混練し、１６０℃に達したときに放出したマスターバッチに加硫促進剤と硫黄を８インチのオープンロールで混練してゴム組成物を得た。次いで、このゴム組成物を１５ｃｍ×１５ｃｍ×０.２ｃｍの金型中で１５０℃、３０分間プレス加硫して目的とする試験片（ゴムシート）を作製し、以下の試験に供した。
Preparation of test samples Vulcanization accelerators and ingredients other than sulfur in the formulations shown in Table 1 below were kneaded for 5 minutes in a 1.8 L closed mixer, and vulcanization was accelerated to the master batch released when the temperature reached 160 ° C. The rubber composition was obtained by kneading the agent and sulfur with an 8-inch open roll. Next, this rubber composition was press vulcanized at 150 ° C. for 30 minutes in a 15 cm × 15 cm × 0.2 cm mold to prepare a target test piece (rubber sheet), which was subjected to the following test.
試験方法
１）混合加工性： 混合ゴムのまとまり、シーティング性、およびカーボンブラック／シリカの分散状況を５点満点（５点：最良）で評価した。
２）デュロ硬さ： ＪＩＳ Ｋ６２５１に準拠して、デュロメータ硬さ（スプリング式）について測定した。
３）ｔａｎδ（６０℃）： ＪＩＳ Ｋ６３９４に準拠して、粘弾性スペクトロメータ−（東洋精機製作所製）を用い、初期歪１０％、動的歪±２％、周波数２０Ｈｚ、雰囲気温度６０℃の条件で測定した。標準例を１００として指数表示した。この数値が大きい程発熱が高い。
４）耐疲労性： 疲労試験機（モンサント社製）を用いて、歪率１２０％の条件を適用した以外はＡＳＴＭ−４４８２に規定されている方法に準拠して破断するまで測定した。破断するまでの回数を、標準例を１００として指数表示した。この数値が大きい程、良好であることを示す。
Test Method 1) Mixing Processability: The mixed rubber was evaluated for its grouping, sheeting properties, and carbon black / silica dispersion status on a 5-point scale (5 points: best).
2) Durometer: Durometer hardness (spring type) was measured according to JIS K6251.
3) tan δ (60 ° C.): In accordance with JIS K6394, using a viscoelastic spectrometer (manufactured by Toyo Seiki Seisakusho), initial strain 10%, dynamic strain ± 2%, frequency 20 Hz, ambient temperature 60 ° C. Measured with The index was displayed with the standard example as 100. The higher this value, the higher the heat generation.
4) Fatigue resistance: Using a fatigue tester (manufactured by Monsanto), measurement was performed until fracture occurred in accordance with the method prescribed in ASTM-4482 except that the condition of a strain rate of 120% was applied. The number of times until breakage was expressed as an index with the standard example being 100. It shows that it is so favorable that this figure is large.
標準例、実施例１〜４および比較例１〜９
結果を以下の表１に示す。
The results are shown in Table 1 below.
表１の結果によれば、次のことが分る。比較例１のように、低発熱化を狙って加硫系配合剤を増量すると、耐疲労性が低下してしまう。比較例２のように、カーボンブラックの低グレート化により低発熱化を狙うと、硬度が低下してしまう。比較例３および４のように、カーボンブラック／シリカ配合系にしても、加硫促進剤量が少なく、プリブレンドブタジエンゴムを用いない場合は、混合加工性および硬度／耐疲労性が低下してしまう。比較例５のように、カーボンブラック／シリカ配合系にしても、硫黄量が多く、プリブレンドブタジエンゴムを用いない場合は、混合加工性および耐疲労性が低下してしまう。比較例６のように、カーボンブラック／シリカ配合系でカーボンブラックを高グレード化した場合でも、加硫促進剤量が少なく、プリブレンドブタジエンゴムを用いない場合は、混合加工性および硬度が低下し、発熱が悪化してしまう。比較例７のように、カーボンブラック／シリカ配合系でプリブレンドブタジエンゴムを用いても、加硫促進剤が少ないと発熱が悪化してしまう。比較例８のように、カーボンブラック／シリカ配合系にしても、プリブレンドタイプのブタジエンゴムを用いない場合は、混合加工性および耐疲労性が悪化してしまう。比較例９のように、カーボンブラック／シリカ配合系にしても、高分子量ブタジエンゴムのみを用いた場合は、混合加工性、硬さおよび発熱が悪化してしまう。これに対して、本発明による特定の配合系を採ることによって、実施例１〜４に示されるように、混合加工性、硬さ、発熱および耐疲労性の全てが良好となり、操縦安定性、耐老化性、耐カット性、発熱、耐疲労性が高次元にバランスしている。 According to the results in Table 1, the following can be found. As in Comparative Example 1, when the amount of the vulcanizing compound is increased with the aim of reducing heat generation, the fatigue resistance is lowered. As in Comparative Example 2, when the heat generation is reduced by reducing the carbon black, the hardness decreases. As in Comparative Examples 3 and 4, even when the carbon black / silica blending system is used, when the amount of vulcanization accelerator is small and pre-blend butadiene rubber is not used, the mixing processability and hardness / fatigue resistance are reduced. End up. Even in the carbon black / silica blend system as in Comparative Example 5, the amount of sulfur is large, and when the pre-blend butadiene rubber is not used, the mixing processability and fatigue resistance are lowered. As in Comparative Example 6, even when the grade of carbon black is upgraded in a carbon black / silica blend system, the amount of vulcanization accelerator is small, and when pre-blend butadiene rubber is not used, mixing processability and hardness are reduced. The fever will get worse. As in Comparative Example 7, even if a preblended butadiene rubber is used in a carbon black / silica blend system, the heat generation deteriorates if there are few vulcanization accelerators. Even if a carbon black / silica blend system is used as in Comparative Example 8, if no pre-blend type butadiene rubber is used, the mixing processability and fatigue resistance are deteriorated. Even in the carbon black / silica blend system as in Comparative Example 9, when only the high molecular weight butadiene rubber is used, the mixing processability, hardness and heat generation deteriorate. On the other hand, by adopting a specific blending system according to the present invention, as shown in Examples 1 to 4, the mixed processability, hardness, heat generation and fatigue resistance are all improved, steering stability, Aging resistance, cut resistance, heat generation, and fatigue resistance are balanced at a high level.
よって、本発明による特定組成のシリカ配合系になるゴム組成物では、これらの諸特性が高次元にバランスされているので、これをタイヤサイドウォールゴム組成物として用いた空気入りタイヤとすれば、極めて有効である。 Therefore, in the rubber composition that becomes a silica compound system of a specific composition according to the present invention, these characteristics are balanced in a high dimension, so if this is a pneumatic tire used as a tire sidewall rubber composition, It is extremely effective.
Claims (2)
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| JP2004174013A JP2005350595A (en) | 2004-06-11 | 2004-06-11 | Pneumatic tire |
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| JP2004174013A JP2005350595A (en) | 2004-06-11 | 2004-06-11 | Pneumatic tire |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007191611A (en) * | 2006-01-20 | 2007-08-02 | Bridgestone Corp | Rubber composition mixed with modified polybutadiene rubber and tire |
| JP2008120895A (en) * | 2006-11-10 | 2008-05-29 | Toyo Tire & Rubber Co Ltd | Sidewall rubber composition and pneumatic tire |
| JP2008255161A (en) * | 2007-04-02 | 2008-10-23 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US7732522B2 (en) | 2007-12-28 | 2010-06-08 | Bridgestone Americas Tire Operations, Llc | Silica containing black sidewall compounds and tires comprising same |
| JP2012149175A (en) * | 2011-01-19 | 2012-08-09 | Sumitomo Rubber Ind Ltd | Rubber composition for tire and pneumatic tire |
| WO2012133248A1 (en) | 2011-03-28 | 2012-10-04 | 株式会社ブリヂストン | Tire casing |
| JP2013001889A (en) * | 2011-06-21 | 2013-01-07 | Sumitomo Rubber Ind Ltd | Rubber composition for sidewall and pneumatic tire |
| CN108794828A (en) * | 2017-05-01 | 2018-11-13 | 住友橡胶工业株式会社 | Rubber composition for tire and pneumatic tire |
-
2004
- 2004-06-11 JP JP2004174013A patent/JP2005350595A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007191611A (en) * | 2006-01-20 | 2007-08-02 | Bridgestone Corp | Rubber composition mixed with modified polybutadiene rubber and tire |
| JP2008120895A (en) * | 2006-11-10 | 2008-05-29 | Toyo Tire & Rubber Co Ltd | Sidewall rubber composition and pneumatic tire |
| JP2008255161A (en) * | 2007-04-02 | 2008-10-23 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| US7732522B2 (en) | 2007-12-28 | 2010-06-08 | Bridgestone Americas Tire Operations, Llc | Silica containing black sidewall compounds and tires comprising same |
| US8372910B2 (en) | 2007-12-28 | 2013-02-12 | Bridgestone Americas Tire Operations, Llc | Silica containing black sidewall compounds and tires comprising same |
| JP2012149175A (en) * | 2011-01-19 | 2012-08-09 | Sumitomo Rubber Ind Ltd | Rubber composition for tire and pneumatic tire |
| WO2012133248A1 (en) | 2011-03-28 | 2012-10-04 | 株式会社ブリヂストン | Tire casing |
| JP2013001889A (en) * | 2011-06-21 | 2013-01-07 | Sumitomo Rubber Ind Ltd | Rubber composition for sidewall and pneumatic tire |
| CN108794828A (en) * | 2017-05-01 | 2018-11-13 | 住友橡胶工业株式会社 | Rubber composition for tire and pneumatic tire |
| CN108794828B (en) * | 2017-05-01 | 2022-04-05 | 住友橡胶工业株式会社 | Rubber composition for tire and pneumatic tire |
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