To provide a reclaimed rubber-containing rubber composition which is excellent in fracture characteristics and fatigue resistance when made into a vulcanized rubber, and to provide a pneumatic tire including a rubber part formed by vulcanizing and molding the reclaimed rubber-containing rubber composition.SOLUTION: The reclaimed rubber-containing rubber composition contains a reclaimed rubber. The reclaimed rubber contains carbon black having a specific surface area based on a BET method of 100-120 m2/g and has a gel fraction of 75% or less. Preferably, the reclaimed rubber is reclaimed rubber powder having an average particle diameter d70 of 100 μm or less and an average particle diameter d90 of 150 μm or less.SELECTED DRAWING: None
【課題】加硫ゴムとしたときに破壊特性や耐疲労性に優れた再生ゴム含有ゴム組成物、および再生ゴム含有ゴム組成物を加硫成形してなるゴム部を備える空気入りタイヤを提供すること。【解決手段】再生ゴムを含有する再生ゴム含有ゴム組成物であって、再生ゴムが、BET法に基づく比表面積が100~120m2/gであるカーボンブラックを含有し、かつゲル分率が75%以下である再生ゴム含有ゴム組成物。再生ゴムが、平均粒径d70が100μm以下であり、かつ平均粒径d90が150μm以下である再生ゴム粉であることが好ましい。【選択図】 なし
RECLAIMED RUBBER-CONTAINING RUBBER COMPOSITION AND PNEUMATIC TIRE
再生ゴム含有ゴム組成物および空気入りタイヤ
2025-01-30
Patent
Electronic Resource
Japanese
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 |
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