To provide a rubber composition for a bead filler, which is excellent in processability and is capable of improving steering stability of a pneumatic tire when used as a bead filler.SOLUTION: The rubber composition for a bead filler contains 40-100 pts.mass of carbon black having a nitrogen adsorption specific surface area NSA of 60-150 m/g, 7-25 pts.mass of a cardanol oligomer, and 0.05-0.5 pt.mass of an organic acid metal salt in terms of metal based on 100 pts.mass of a diene rubber comprising 50-80 pts.mass of a natural rubber and 20-50 pts.mass of a styrene-butadiene rubber and also contains 5-20 mass% of hexamethylenetetramine based on 100 mass% of the cardanol oligomer.SELECTED DRAWING: None

    【課題】加工性に優れ、且つ、ビードフィラーに用いた際に空気入りタイヤの操縦安定性を向上することができるビードフィラー用ゴム組成物を提供する。【解決手段】天然ゴム50質量部〜80質量部およびスチレン‐ブタジエンゴム20質量部〜50質量部からなるジエン系ゴム100質量部に対し、窒素吸着比表面積N2SAが60m2/g〜150m2/gであるカーボンブラックを40質量部〜100質量部、カルダノールオリゴマーを7質量部〜25質量部、有機酸金属塩を金属換算で0.05質量部〜0.5質量部配合し、且つ、ヘキサメチレンテトラミンをカルダノールオリゴマー100質量%に対して5質量%〜20質量%配合する。【選択図】なし


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    Title :

    RUBBER COMPOSITION FOR BEAD FILLER


    Additional title:

    ビードフィラー用ゴム組成物


    Contributors:
    KATO MANABU (author)

    Publication date :

    2019-06-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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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