JP2008144023A - Rubber composition and tire for heavy load using the same - Google Patents
Rubber composition and tire for heavy load using the same Download PDFInfo
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本発明は、ゴム組成物及び該ゴム組成物を用いた重荷重用タイヤに関し、特に低発熱性でありながら、耐久性及び耐劣化性に優れたゴム組成物と、該ゴム組成物をカーカスとインナーライナーとの間の層間ゴムに用いた、優れた耐久性を有する重荷重用タイヤに関するものである。 The present invention relates to a rubber composition and a heavy-duty tire using the rubber composition, and in particular, a rubber composition excellent in durability and deterioration resistance while being low in heat generation, and the rubber composition as a carcass and an inner The present invention relates to a heavy duty tire having excellent durability, which is used for an interlayer rubber between the liner and the liner.
一般に、重荷重用タイヤは、厳しい環境で使用されるため、該重荷重用タイヤを構成する各ゴム部材には、高い耐久性及び耐劣化性を有するゴム組成物を使用する必要がある。例えば、特開２００４−３２３６６２号（特許文献１）には、耐劣化性等に優れたゴム組成物を重荷重用タイヤのスチールコードのコーティングゴムに適用することが開示されている。 Generally, since a heavy load tire is used in a severe environment, it is necessary to use a rubber composition having high durability and deterioration resistance for each rubber member constituting the heavy load tire. For example, Japanese Patent Application Laid-Open No. 2004-323661 (Patent Document 1) discloses that a rubber composition excellent in deterioration resistance and the like is applied to a coating rubber of a steel cord of a heavy duty tire.
なお、ゴム組成物の耐久性を向上させるには、充填剤として、高補強性のカーボンブラックを配合することが一般的であるが、この場合、ゴム組成物の損失正接が高くなる。そして、このような損失正接が高いゴム組成物を、大きく変形する部材、特に高内圧で充填された空気に近く、劣化し易い部材であるカーカスとインナーライナーとの間の層間ゴムに使用した場合、該層間ゴムの発熱性が高くなり、熱で劣化が著しく促進されてしまう。 In order to improve the durability of the rubber composition, it is common to add highly reinforcing carbon black as a filler. In this case, the loss tangent of the rubber composition is increased. And when such a rubber composition having a high loss tangent is used for an interlayer rubber between a carcass and an inner liner, which is a member that deforms greatly, in particular, an air that is close to air filled with a high internal pressure and is easily deteriorated. The exothermic property of the interlayer rubber is increased, and the deterioration is significantly accelerated by heat.
一方、補強性が低いカーボンブラックを配合したゴム組成物を上記層間ゴムに使用した場合、層間ゴム自体の耐久性が低下するため、層間ゴムの発熱性が低くても、重荷重用タイヤに本来必要とされる耐久性能を満足することができない。 On the other hand, when a rubber composition containing carbon black with low reinforcing properties is used for the above interlayer rubber, the durability of the interlayer rubber itself is reduced, so it is essential for heavy duty tires even if the heat generation of the interlayer rubber is low. It is not possible to satisfy the durability performance.
そこで、本発明の目的は、上記従来技術の問題を解決し、低発熱性でありながら、耐久性及び耐劣化性に優れたゴム組成物を提供することにある。また、本発明の他の目的は、かかるゴム組成物をカーカスとインナーライナーとの間の層間ゴムに用いた、優れた耐久性を有する重荷重用タイヤを提供することにある。 Accordingly, an object of the present invention is to provide a rubber composition that solves the above-mentioned problems of the prior art and has excellent durability and deterioration resistance while being low in heat generation. Another object of the present invention is to provide a heavy duty tire having excellent durability using such a rubber composition as an interlayer rubber between a carcass and an inner liner.
本発明者は、上記目的を達成するために鋭意検討した結果、天然ゴム及び／又はポリイソプレンゴムと、特定の物性を有するカーボンブラックと、硫黄と、トランスポリブタジエンゴム及び／又は耐熱性架橋剤とを特定の割合で含むゴム組成物が、低発熱性でありながら、優れた耐久性及び耐劣化性を有し、該ゴム組成物を重荷重用タイヤのカーカスとインナーライナーとの間に位置する層間ゴムに適用することで、重荷重用タイヤの耐久性が向上することを見出し、本発明を完成させるに至った。 As a result of intensive studies to achieve the above object, the present inventor has found that natural rubber and / or polyisoprene rubber, carbon black having specific physical properties, sulfur, transpolybutadiene rubber and / or heat-resistant crosslinking agent, The rubber composition having a specific ratio is low exothermic and has excellent durability and degradation resistance, and the rubber composition is disposed between the carcass and the inner liner of the heavy duty tire. It has been found that the durability of heavy duty tires is improved by applying it to rubber, and the present invention has been completed.
即ち、本発明の第一のゴム組成物は、天然ゴム及びポリイソプレンゴムの少なくとも一方を合計50〜98質量％並びにトランスポリブタジエンゴムを2.0〜15.0質量％含むゴム成分100質量部に対して、
窒素吸着比表面積（Ｎ2ＳＡ）が20〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラック40〜80質量部と、硫黄3〜14質量部とを配合してなることを特徴とする。
That is, the first rubber composition of the present invention is based on 100 parts by mass of a rubber component containing a total of 50 to 98% by mass of natural rubber and polyisoprene rubber and 2.0 to 15.0% by mass of transpolybutadiene rubber.
40 to 80 parts by mass of carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 20 to 70 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 60 to 130 mL / 100 g, and 3 to 14 parts by mass of sulfur It is characterized by blending.
本発明の第一のゴム組成物は、更に、耐熱性架橋剤を前記ゴム成分100質量部に対して0.3〜2.0質量部含有することが好ましい。 The first rubber composition of the present invention preferably further contains 0.3 to 2.0 parts by mass of a heat-resistant crosslinking agent with respect to 100 parts by mass of the rubber component.
また、本発明の第二のゴム組成物は、天然ゴム及びポリイソプレンゴムの少なくとも一方を合計50〜100質量％含むゴム成分100質量部に対して、
窒素吸着比表面積（Ｎ2ＳＡ）が20〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラック40〜80質量部と、硫黄3〜14質量部と、耐熱性架橋剤0.3〜2.0質量部とを配合してなることを特徴とする。
Further, the second rubber composition of the present invention is based on 100 parts by mass of a rubber component containing a total of 50 to 100% by mass of at least one of natural rubber and polyisoprene rubber.
40 to 80 parts by mass of carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 20 to 70 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 60 to 130 mL / 100 g, 3 to 14 parts by mass of sulfur, It is characterized by blending 0.3 to 2.0 parts by mass of a heat-resistant crosslinking agent.
本発明のゴム組成物において、前記トランスポリブタジエンゴムは、トランス結合含有量が82〜98モル％であり、且つ重量平均分子量が30,000〜200,000であることが好ましい。 In the rubber composition of the present invention, the trans polybutadiene rubber preferably has a trans bond content of 82 to 98 mol% and a weight average molecular weight of 30,000 to 200,000.
本発明のゴム組成物において、前記耐熱性架橋剤としては、１,６-ヘキサメチレンジチオ硫酸ナトリウム・２水和物が好ましい。 In the rubber composition of the present invention, the heat-resistant crosslinking agent is preferably sodium 1,6-hexamethylenedithiosulfate dihydrate.
また、本発明のゴム組成物は、重荷重用タイヤのカーカスとインナーライナーとの間に位置する層間ゴムに用いられることが好ましい。 The rubber composition of the present invention is preferably used for an interlayer rubber located between the carcass and the inner liner of a heavy duty tire.
更に、本発明の重荷重用タイヤは、カーカスと、インナーライナーと、該カーカスとインナーライナーとの間に配置された層間ゴムとを具え、該層間ゴムに上記のゴム組成物を用いたことを特徴とする。 Furthermore, the heavy duty tire of the present invention comprises a carcass, an inner liner, and an interlayer rubber disposed between the carcass and the inner liner, and the rubber composition described above is used for the interlayer rubber. And
本発明によれば、天然ゴム及び／又はポリイソプレンゴムと、特定の物性を有するカーボンブラックと、硫黄と、トランスポリブタジエンゴム及び／又は耐熱性架橋剤とを特定の割合で含み、低発熱性でありながら、耐久性及び耐劣化性に優れたゴム組成物を提供することができる。また、かかるゴム組成物をカーカスとインナーライナーとの間の層間ゴムに用いた、優れた耐久性を有する重荷重用タイヤを提供することができる。 According to the present invention, natural rubber and / or polyisoprene rubber, carbon black having specific physical properties, sulfur, transpolybutadiene rubber and / or heat-resistant cross-linking agent are included in a specific ratio, and low heat build-up is achieved. Nevertheless, it is possible to provide a rubber composition having excellent durability and deterioration resistance. Moreover, the heavy duty tire which has the outstanding durability which used this rubber composition for the interlayer rubber between a carcass and an inner liner can be provided.
以下に、本発明のゴム組成物を詳細に説明する。本発明の第一のゴム組成物は、天然ゴム及びポリイソプレンゴムの少なくとも一方を合計50〜98質量％並びにトランスポリブタジエンゴムを2.0〜15.0質量％含むゴム成分100質量部に対して、窒素吸着比表面積（Ｎ2ＳＡ）が30〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラック40〜80質量部と、硫黄3〜14質量部とを配合してなることを特徴とし、本発明の第二のゴム組成物は、天然ゴム及びポリイソプレンゴムの少なくとも一方を合計50〜100質量％含むゴム成分100質量部に対して、窒素吸着比表面積（Ｎ2ＳＡ）が30〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラック40〜80質量部と、硫黄3〜14質量部と、耐熱性架橋剤0.3〜2.0質量部とを配合してなることを特徴とする。 Below, the rubber composition of this invention is demonstrated in detail. The first rubber composition of the present invention has a nitrogen adsorption ratio based on 100 parts by mass of a rubber component containing a total of 50 to 98% by mass of natural rubber and polyisoprene rubber and 2.0 to 15.0% by mass of transpolybutadiene rubber. 40 to 80 parts by mass of carbon black having a surface area (N 2 SA) of 30 to 70 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 60 to 130 mL / 100 g and 3 to 14 parts by mass of sulfur The second rubber composition of the present invention has a nitrogen adsorption specific surface area (N 2) based on 100 parts by mass of a rubber component containing a total of 50 to 100% by mass of at least one of natural rubber and polyisoprene rubber. SA) is 30 to 70 m 2 / g and dibutyl phthalate (DBP) oil absorption is 60 to 130 mL / 100 g. It is characterized by blending with parts by mass.
本発明のゴム組成物は、配合されるカーボンブラックの窒素吸着比表面積（Ｎ2ＳＡ）が70m2/g以下で且つジブチルフタレート（ＤＢＰ）吸油量が130mL/100g以下であるため、損失正接が低く、低発熱性に優れる。また、本発明のゴム組成物は、配合されるカーボンブラックの窒素吸着比表面積（Ｎ2ＳＡ）が30m2/g以上で且つジブチルフタレート（ＤＢＰ）吸油量が60mL/100g以上であることに加え、トランスポリブタジエンゴム及び／又は耐熱性架橋剤を含むため、耐久性及び耐劣化性に優れる。なお、トランスポリブタジエンゴムは、天然ゴム及び／又はポリイソプレンゴムの伸張結晶性を向上させて、ゴム組成物の耐破壊性を向上させ、一方、耐熱性架橋剤は、熱的に安定な架橋構造を付与して、ゴム組成物の耐久性を向上させる。 Since the rubber composition of the present invention has a nitrogen adsorption specific surface area (N 2 SA) of blended carbon black of 70 m 2 / g or less and a dibutyl phthalate (DBP) oil absorption of 130 mL / 100 g or less, the loss tangent is Low and excellent in low heat generation. The rubber composition of the present invention has a nitrogen adsorption specific surface area (N 2 SA) of carbon black to be blended of 30 m 2 / g or more and a dibutyl phthalate (DBP) oil absorption of 60 mL / 100 g or more. In addition, since it contains a trans polybutadiene rubber and / or a heat-resistant crosslinking agent, it has excellent durability and deterioration resistance. Incidentally, the trans polybutadiene rubber improves the stretch crystallinity of natural rubber and / or polyisoprene rubber and improves the fracture resistance of the rubber composition, while the heat resistant cross-linking agent has a thermally stable cross-linked structure. To improve the durability of the rubber composition.
本発明の第一のゴム組成物のゴム成分は、天然ゴム及びポリイソプレンゴムの少なくとも一方を合計50〜98質量％含み、また、本発明の第二のゴム組成物のゴム成分は、天然ゴム及びポリイソプレンゴムの少なくとも一方を合計50〜100質量％含む。ゴム成分中の天然ゴム及びポリイソプレンゴムの総含有率が50質量％未満では、ゴム組成物の耐破壊性が低下する。 The rubber component of the first rubber composition of the present invention contains a total of 50 to 98% by mass of at least one of natural rubber and polyisoprene rubber, and the rubber component of the second rubber composition of the present invention is natural rubber. And a total of at least one of the polyisoprene rubber is 50 to 100% by mass. When the total content of natural rubber and polyisoprene rubber in the rubber component is less than 50% by mass, the fracture resistance of the rubber composition is lowered.
本発明の第一のゴム組成物のゴム成分は、トランスポリブタジエンゴムを2.0〜15.0質量％含む。ゴム成分中のトランスポリブタジエンゴムの含有率が2.0質量％以上であれば、天然ゴム及び／又はポリイソプレンゴムの伸張結晶性が向上し、ゴム組成物の耐破壊性を向上させることができる。一方、ゴム成分中のトランスポリブタジエンゴムの含有率が15.0質量％を超えると、天然ゴム及び／又はポリイソプレンゴムとの相溶性が得られず、ゴム組成物の耐破壊性が低下する。 The rubber component of the first rubber composition of the present invention contains 2.0 to 15.0% by mass of trans polybutadiene rubber. When the content of the trans polybutadiene rubber in the rubber component is 2.0% by mass or more, the stretch crystallinity of the natural rubber and / or polyisoprene rubber is improved, and the fracture resistance of the rubber composition can be improved. On the other hand, if the content of the trans polybutadiene rubber in the rubber component exceeds 15.0% by mass, compatibility with natural rubber and / or polyisoprene rubber cannot be obtained, and the fracture resistance of the rubber composition decreases.
上記トランスポリブタジエンゴムは、トランス結合含有量が82〜98モル％であることが好ましい。トランスポリブタジエンゴムのトランス結合含有量が高いほど、天然ゴム及びイソプレンゴムの伸張結晶性を促進する効果が高くなる傾向がある。ここで、トランスポリブタジエンゴムのトランス結合含有量が82モル％未満では、天然ゴム及び／又はポリイソプレンゴムの伸張結晶性の促進効果が十分得られず、一方、トランス結合含有量が98モル％を超えるトランスポリブタジエンゴムは、合成上困難である。 The trans polybutadiene rubber preferably has a trans bond content of 82 to 98 mol%. The higher the trans bond content of the trans polybutadiene rubber, the higher the effect of promoting the stretch crystallinity of natural rubber and isoprene rubber. Here, if the trans bond content of the trans polybutadiene rubber is less than 82 mol%, the effect of promoting the stretched crystallinity of natural rubber and / or polyisoprene rubber cannot be sufficiently obtained, while the trans bond content is 98 mol%. Exceeding trans polybutadiene rubber is difficult to synthesize.
また、上記トランスポリブタジエンゴムは、重量平均分子量（Ｍw）が30,000〜200,000であることが好ましい。重量平均分子量がこの範囲にあると、ゴム組成物の未加硫時の加工性と加硫時の物性とのバランスが良い。なお、トランスポリブタジエンゴムの重量平均分子量が30,000未満では、天然ゴム及び／又はポリイソプレンゴムとの共架橋性が低下して、ゴム組成物の耐破壊性が低下する傾向があり、一方、200,000を超えると、天然ゴム及び／又はポリイソプレンゴムとの相溶性が得られず、また、天然ゴム及び／又はポリイソプレンゴムの伸張結晶性の促進効果が十分に得られず、ゴム組成物の耐破壊性が低下する。 The trans polybutadiene rubber preferably has a weight average molecular weight (Mw) of 30,000 to 200,000. When the weight average molecular weight is in this range, the rubber composition has a good balance between the processability when not vulcanized and the physical properties when vulcanized. When the weight average molecular weight of the trans polybutadiene rubber is less than 30,000, the co-crosslinking property with the natural rubber and / or the polyisoprene rubber tends to decrease, and the fracture resistance of the rubber composition tends to decrease. If it exceeds, compatibility with natural rubber and / or polyisoprene rubber will not be obtained, and the effect of promoting the stretched crystallinity of natural rubber and / or polyisoprene rubber will not be sufficiently obtained, and the rubber composition will not break. Sex is reduced.
本発明のゴム組成物に用いるゴム成分としては、天然ゴム(ＮＲ)、ポリイソプレンゴム(ＩＲ)、トランスポリブタジエンゴム(trans-ＢＲ)の他、スチレン・ブタジエン共重合体ゴム(ＳＢＲ)、他のポリブタジエンゴム(ＢＲ)等が挙げられ、目的に応じて、適宜選択してブレンドすることができる。 The rubber component used in the rubber composition of the present invention includes natural rubber (NR), polyisoprene rubber (IR), trans polybutadiene rubber (trans-BR), styrene / butadiene copolymer rubber (SBR), other Examples thereof include polybutadiene rubber (BR) and the like, which can be appropriately selected and blended depending on the purpose.
本発明のゴム組成物は、上記ゴム成分100質量部に対して、窒素吸着比表面積（Ｎ2ＳＡ）が20〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラックを40〜80質量部含有する。カーボンブラックのＮ2ＳＡが20m2/g未満では、ゴム組成物の補強性が低下し、一方、70m2/gを超えると、ゴム組成物の発熱性が大きくなる。また、カーボンブラックのＤＢＰ吸油量が60mL/100g未満では、ゴム組成物の補強性が低下し、一方、130mL/100gを超えると、ゴム組成物の発熱性が大きくなる。更に、かかる物性を有するカーボンブラックの配合量が40質量部未満では、ゴム組成物の補強性が不足し、一方、80質量部を超えると、ゴム組成物の発熱性が大きくなる。 The rubber composition of the present invention has a nitrogen adsorption specific surface area (N 2 SA) of 20 to 70 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 60 to 130 mL / 100 g with respect to 100 parts by mass of the rubber component. It contains 40 to 80 parts by mass of a certain carbon black. If the N 2 SA of the carbon black is less than 20 m 2 / g, the reinforcing property of the rubber composition is lowered, while if it exceeds 70 m 2 / g, the exothermic property of the rubber composition is increased. Further, if the DBP oil absorption of carbon black is less than 60 mL / 100 g, the reinforcing property of the rubber composition is lowered, while if it exceeds 130 mL / 100 g, the exothermic property of the rubber composition is increased. Furthermore, when the compounding amount of carbon black having such physical properties is less than 40 parts by mass, the reinforcing property of the rubber composition is insufficient. On the other hand, when it exceeds 80 parts by mass, the exothermic property of the rubber composition increases.
本発明のゴム組成物は、上記ゴム成分100質量部に対して、硫黄を3〜14質量部含有する。硫黄の配合量が3質量部未満では、ゴム組成物の弾性率が不足し、ゴム組成物の耐久性が低下する。一方、硫黄の配合量が14質量部を超えると、天然ゴム及び／又はポリイソプレンゴムの伸張結晶性自体が損なわれ、ゴム組成物の耐破壊性が低下する。 The rubber composition of the present invention contains 3 to 14 parts by mass of sulfur with respect to 100 parts by mass of the rubber component. When the amount of sulfur is less than 3 parts by mass, the elastic modulus of the rubber composition is insufficient and the durability of the rubber composition is lowered. On the other hand, when the amount of sulfur exceeds 14 parts by mass, the stretched crystallinity of the natural rubber and / or polyisoprene rubber itself is impaired, and the fracture resistance of the rubber composition is lowered.
本発明の第二のゴム組成物は、上記ゴム成分100質量部に対して、耐熱性架橋剤を0.3〜2.0質量部含有する。また、本発明の第一のゴム組成物は、上記ゴム成分100質量部に対して、耐熱性架橋剤を0.3〜2.0質量部含有することが好ましい。耐熱性架橋剤の配合量が0.3質量部未満では、熱的に安定な架橋構造を十分に付与できず、ゴム組成物の耐久性が低下することがあり、一方、2.0質量部を超えると、効果が飽和に達し、ゴム組成物の耐久性を更に向上させることができない。なお、上記耐熱性架橋剤としては、１,６-ヘキサメチレンジチオ硫酸ナトリウム・２水和物［ＮａＯ3Ｓ-Ｓ-(ＣＨ2)6-Ｓ-ＳＯ3Ｎａ・２Ｈ2Ｏ］が特に好ましい。 The second rubber composition of the present invention contains 0.3 to 2.0 parts by mass of a heat-resistant crosslinking agent with respect to 100 parts by mass of the rubber component. Moreover, it is preferable that the 1st rubber composition of this invention contains 0.3-2.0 mass parts of heat resistant crosslinking agents with respect to 100 mass parts of said rubber components. When the blending amount of the heat-resistant crosslinking agent is less than 0.3 parts by mass, it may not be possible to sufficiently impart a thermally stable crosslinked structure, and the durability of the rubber composition may be reduced, whereas when it exceeds 2.0 parts by mass, The effect reaches saturation and the durability of the rubber composition cannot be further improved. The heat-resistant crosslinking agent is particularly preferably sodium 1,6-hexamethylenedithiosulfate dihydrate [NaO 3 S—S— (CH 2 ) 6 —S—SO 3 Na · 2H 2 O]. .
次に、図を参照しながら、本発明の重荷重用タイヤを詳細に説明する。図１は、本発明の重荷重用タイヤの一例のサイド部の部分断面図である。図１に示す重荷重用タイヤは、カーカス１と、インナーライナー２と、カーカス１とインナーライナー２との間に配置された層間ゴム３と、カーカス１のタイヤ幅方向外側に位置するサイドゴム４とを具える。ここで、本発明の重荷重用タイヤは、上述した本発明のゴム組成物を層間ゴム３に用いたことを特徴とし、高い耐久性を有する。上述のように、カーカス１とインナーライナー２との間の層間ゴム３は、大きく変形する部材であると共に、高内圧で充填された空気に近く、劣化し易い部材であるが、上述した低発熱性で且つ耐久性及び耐劣化性に優れたゴム組成物を適用することで、層間ゴム３の発熱及び劣化を抑制して、タイヤの耐久性を向上させることができる。なお、本発明の重荷重用タイヤの層間ゴム３以外の部材には、従来より公知の構造及び材料からなる部材を採用することができる。
Next, the heavy duty tire of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial cross-sectional view of a side portion of an example of a heavy duty tire of the present invention. The heavy duty tire shown in FIG. 1 includes a carcass 1, an
以下に、実施例を挙げて本発明を更に詳しく説明するが、本発明は下記の実施例に何ら限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.
表１に示す配合のゴム組成物を常法に従って調製した。次に、各ゴム組成物をシート状にして、カーカスとインナーライナーとの間の層間ゴムとして使用し、サイズ１１Ｒ２２.５の重荷重用タイヤを常法に従って作製した。得られたタイヤに対してドラム走行試験を行い、200,000km走行後、タイヤを解剖して、層間ゴムにおけるクラックの発生の有無を観察した。結果を表１に示す。 A rubber composition having the composition shown in Table 1 was prepared according to a conventional method. Next, each rubber composition was formed into a sheet and used as an interlayer rubber between the carcass and the inner liner, and a heavy duty tire of size 11R22.5 was produced according to a conventional method. The obtained tire was subjected to a drum running test. After running for 200,000 km, the tire was dissected to observe the occurrence of cracks in the interlayer rubber. The results are shown in Table 1.
*1 トランス結合含有量＝88モル％, 重量平均分子量＝68000
*2 Ｎ2ＳＡ＝85m2/g, ＤＢＰ吸油量＝75mL/100g
*3 Ｎ2ＳＡ＝30m2/g, ＤＢＰ吸油量＝85mL/100g
*4 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
*5 日立化成工業(株)製, ヒタノール１５０２
*6 １,６-ヘキサメチレンジチオ硫酸ナトリウム・２水和物
*7 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, 大内新興化学工業(株)製, ノクセラーＤＺ
* 1 Trans bond content = 88 mol%, weight average molecular weight = 68000
* 2 N 2 SA = 85m 2 / g, DBP oil absorption = 75mL / 100g
* 3 N 2 SA = 30m 2 / g, DBP oil absorption = 85mL / 100g
* 4 N- (1,3-Dimethylbutyl) -N'-phenyl-p-phenylenediamine
* 5 Hitachi Chemical Co., Ltd., Hitanol 1502
* 6 Sodium 1,6-hexamethylenedithiosulfate dihydrate
* 7 N, N'-dicyclohexyl-2-benzothiazolylsulfenamide, manufactured by Ouchi Shinsei Chemical Co., Ltd., Noxeller DZ
表１から、本発明に従うゴム組成物をカーカスとインナーライナーとの間の層間ゴムに用いた実施例のタイヤは、ドラム走行後にも層間ゴムにクラックが発生しておらず、高い耐久性を有することが分かる。 From Table 1, the tires of the examples using the rubber composition according to the present invention for the interlayer rubber between the carcass and the inner liner are free from cracks in the interlayer rubber even after running the drum and have high durability. I understand that.
１ カーカス
２ インナーライナー
３ 層間ゴム
４ サイドゴム
1
Claims (7)
窒素吸着比表面積（Ｎ2ＳＡ）が20〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラック40〜80質量部と、硫黄3〜14質量部とを配合してなるゴム組成物。 With respect to 100 parts by mass of a rubber component containing a total of 50 to 98% by mass of natural rubber and polyisoprene rubber and 2.0 to 15.0% by mass of transpolybutadiene rubber,
40 to 80 parts by mass of carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 20 to 70 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 60 to 130 mL / 100 g, and 3 to 14 parts by mass of sulfur A rubber composition obtained by blending.
窒素吸着比表面積（Ｎ2ＳＡ）が20〜70m2/gで且つジブチルフタレート（ＤＢＰ）吸油量が60〜130mL/100gであるカーボンブラック40〜80質量部と、硫黄3〜14質量部と、耐熱性架橋剤0.3〜2.0質量部とを配合してなるゴム組成物。 For 100 parts by mass of a rubber component containing a total of 50 to 100% by mass of natural rubber and polyisoprene rubber,
40 to 80 parts by mass of carbon black having a nitrogen adsorption specific surface area (N 2 SA) of 20 to 70 m 2 / g and a dibutyl phthalate (DBP) oil absorption of 60 to 130 mL / 100 g, 3 to 14 parts by mass of sulfur, A rubber composition comprising 0.3 to 2.0 parts by mass of a heat-resistant crosslinking agent.
前記層間ゴムに請求項１〜５のいずれかに記載のゴム組成物を用いたことを特徴とする重荷重用タイヤ。 In a heavy duty tire comprising a carcass, an inner liner, and an interlayer rubber disposed between the carcass and the inner liner,
A heavy duty tire comprising the rubber composition according to any one of claims 1 to 5 as the interlayer rubber.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008169317A (en) * | 2007-01-12 | 2008-07-24 | Bridgestone Corp | Pneumatic tire |
| JP2013067736A (en) * | 2011-09-22 | 2013-04-18 | Sumitomo Rubber Ind Ltd | Allsteel tire |
| EP2516179A4 (en) * | 2009-12-23 | 2013-08-07 | Michelin Rech Tech | RUBBER COMPOSITION FOR AIRCRAFT TIRE BEARING BANDS |
| WO2014208149A1 (en) | 2013-06-24 | 2014-12-31 | 株式会社ブリヂストン | Pneumatic tyre |
| US11401401B2 (en) | 2019-12-13 | 2022-08-02 | Toyo Tire Corporation | Rubber composition for inner liner and pneumatic tire using the same |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04237405A (en) * | 1991-01-14 | 1992-08-25 | Kubota Corp | Structure for supporting sensor of reaping harvester |
| JPH05214168A (en) * | 1991-10-17 | 1993-08-24 | Goodyear Tire & Rubber Co:The | Rubber material containing high-trans polybutadiene |
| JP2000063573A (en) * | 1998-06-08 | 2000-02-29 | Bridgestone Corp | Rubber composition and pneumatic tire using the same |
| JP2002013084A (en) * | 2000-06-29 | 2002-01-18 | Bridgestone Corp | Rubber-steel cord composite |
| JP2002362107A (en) * | 2001-04-02 | 2002-12-18 | Bridgestone Corp | Radial tire for heavy-duty vehicle |
| JP2004323662A (en) * | 2003-04-24 | 2004-11-18 | Bridgestone Corp | Coating rubber composition for steel cord and heavy duty tire |
| JP2006152117A (en) * | 2004-11-29 | 2006-06-15 | Bridgestone Corp | Radial tire for large-sized vehicle |
| JP2007146035A (en) * | 2005-11-29 | 2007-06-14 | Tokai Rubber Ind Ltd | Vibration-proofing rubber composition and method for producing vibration-proofing rubber by using the same |
-
2006
- 2006-12-08 JP JP2006332191A patent/JP2008144023A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04237405A (en) * | 1991-01-14 | 1992-08-25 | Kubota Corp | Structure for supporting sensor of reaping harvester |
| JPH05214168A (en) * | 1991-10-17 | 1993-08-24 | Goodyear Tire & Rubber Co:The | Rubber material containing high-trans polybutadiene |
| JP2000063573A (en) * | 1998-06-08 | 2000-02-29 | Bridgestone Corp | Rubber composition and pneumatic tire using the same |
| JP2002013084A (en) * | 2000-06-29 | 2002-01-18 | Bridgestone Corp | Rubber-steel cord composite |
| JP2002362107A (en) * | 2001-04-02 | 2002-12-18 | Bridgestone Corp | Radial tire for heavy-duty vehicle |
| JP2004323662A (en) * | 2003-04-24 | 2004-11-18 | Bridgestone Corp | Coating rubber composition for steel cord and heavy duty tire |
| JP2006152117A (en) * | 2004-11-29 | 2006-06-15 | Bridgestone Corp | Radial tire for large-sized vehicle |
| JP2007146035A (en) * | 2005-11-29 | 2007-06-14 | Tokai Rubber Ind Ltd | Vibration-proofing rubber composition and method for producing vibration-proofing rubber by using the same |
Non-Patent Citations (1)
| Title |
|---|
| JPN6012047813; 便覧 ゴム・プラスチック配合薬品 新訂版 , 20010427, １９８, 株式会社ラバーダイジェスト * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008169317A (en) * | 2007-01-12 | 2008-07-24 | Bridgestone Corp | Pneumatic tire |
| EP2516179A4 (en) * | 2009-12-23 | 2013-08-07 | Michelin Rech Tech | RUBBER COMPOSITION FOR AIRCRAFT TIRE BEARING BANDS |
| US10576785B2 (en) | 2009-12-23 | 2020-03-03 | Compagnie Generale Des Etablissements Michelin | Rubber composition for aircraft tire treads |
| JP2013067736A (en) * | 2011-09-22 | 2013-04-18 | Sumitomo Rubber Ind Ltd | Allsteel tire |
| WO2014208149A1 (en) | 2013-06-24 | 2014-12-31 | 株式会社ブリヂストン | Pneumatic tyre |
| US20160272005A1 (en) * | 2013-06-24 | 2016-09-22 | Bridgestone Corporation | Pneumatic tire |
| US10040315B2 (en) | 2013-06-24 | 2018-08-07 | Bridgestone Corporation | Pneumatic tire |
| US11401401B2 (en) | 2019-12-13 | 2022-08-02 | Toyo Tire Corporation | Rubber composition for inner liner and pneumatic tire using the same |
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