PROBLEM TO BE SOLVED: To provide a tire rubber composition with fuel economy, wet grip performance and wear resistance improved in a balanced manner, and a pneumatic tire prepared with the rubber composition.SOLUTION: A tire rubber composition contains a styrene-butadiene rubber and a styrenic resin, the styrene-butadiene rubber satisfying the following formula (1), and the contents of the styrene-butadiene rubber and the styrenic resin satisfying the following formula (2): (1) styrene content ratio×weight average molecular weight×content ratio in rubber component≤200,000; and (2) content of styrene-butadiene rubber/content of styrenic resin≤10.0.SELECTED DRAWING: None
【課題】低燃費性、ウェットグリップ性能及び耐摩耗性をバランス良く改善したタイヤ用ゴム組成物、及び該ゴム組成物を用いて作製した空気入りタイヤを提供する。【解決手段】スチレンブタジエンゴム及びスチレン系樹脂を含み、前記スチレンブタジエンゴムが下記式(1)、前記スチレンブタジエンゴム及び前記スチレン系樹脂の含有量が下記式(2)を満たすタイヤ用ゴム組成物。(1)スチレン含有比率×重量平均分子量×ゴム成分中の含有比率≦20万(2)スチレンブタジエンゴムの含有量/スチレン系樹脂の含有量≦10.0【選択図】なし
TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE
タイヤ用ゴム組成物及び空気入りタイヤ
2018-08-30
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |