PROBLEM TO BE SOLVED: To provide a rubber composition in which processability and tensile breaking elongation are improved to higher levels than in the conventional art.SOLUTION: A rubber composition contains a diene rubber containing a styrene-butadiene copolymer component composed of at least one styrene-butadiene copolymer, and a reinforcing filler. The diene rubber containing a styrene-butadiene copolymer component composed of at least one styrene-butadiene copolymer satisfies the following conditions: (1) the content of bound styrene is 5-50 wt.%, (2) in 100 mol% of the total of an ozonolytic component containing a styrene-derived unit and/or a 1,2-bound butadiene-derived unit, of the components obtained by ozonolysis, an ozonolytic component V1 containing one 1,2-bound butadiene-derived unit is less than 25 mol%, (3) in 100 mol% of the total of an ozonolytic component containing a styrene-derived unit and/or a 1,2-bound butadiene-derived unit, of the components obtained by ozonolysis, an ozonolytic component S2V1 containing two styrene-derived units and one 1,2-bound butadiene-derived unit is 5 mol% or more, and (4) a vinyl content of a butadiene portion is 50% or more.SELECTED DRAWING: None
【課題】加工性および引張破断伸びを従来レベル以上に向上するようにしたゴム組成物を提供する。【解決手段】(1)結合スチレンの含量が5〜50重量%、(2)オゾン分解により得られる成分のうち、スチレン由来単位および/または1,2−結合したブタジエン由来単位を含む分解成分の合計100モル%中、1,2−結合したブタジエン由来単位を1つ含む分解成分V1が25モル%未満、(3)オゾン分解により得られる成分のうち、スチレン由来単位および/または1,2−結合したブタジエン由来単位を含む分解成分の合計100モル%中、スチレン由来単位を2つおよび1,2−結合したブタジエン由来単位を1つ含む分解成分S2V1が5モル%以上、(4)ブタジエン部分のビニル含有量が50%以上を満たす、少なくとも1種のスチレン−ブタジエン共重合体からなるスチレン−ブタジエン共重合体成分を含むジエン系ゴムおよび補強性充填剤を含むことを特徴とする。【選択図】なし
RUBBER COMPOSITION AND PNEUMATIC TIRE PREPARED THEREWITH
ゴム組成物およびそれを用いた空気入りタイヤ
2017-11-16
Patent
Electronic Resource
Japanese
TIRE RUBBER COMPOSITION, AND PNEUMATIC TIRE PREPARED THEREWITH
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