PROBLEM TO BE SOLVED: To provide a rubber composition used in a cushion rubber for a retreaded tire which has a high vulcanization rate, has a late start of vulcanization and can increase a peel strength of a tire and a vulcanized tread.SOLUTION: A rubber composition used in a cushion rubber for a retreaded tire contains a rubber component and two or more kinds of dithiocarbamate vulcanization accelerators, where a content (pts.mass) of the dithiocarbamate vulcanization accelerator with respect to 100 pts.mass of the rubber component satisfies expression (1): [0.1≤content of accelerator A/(content of accelerator A+content of accelerator B)≤0.9]. In expression (1), the accelerator A and the accelerator B are defined by (i): in the largest content of the dithiocarbamate vulcanization accelerator and the second largest content of the dithiocarbamate vulcanization accelerator in the total of the dithiocarbamate vulcanization accelerators, the larger content one is represented by accelerator A and the other one is represented by accelerator B.SELECTED DRAWING: None

    【課題】加硫速度が早く、加硫開始が遅く、タイヤと加硫済みトレッドとの剥離強度を大きくすることができる更生タイヤ用クッションゴムに用いるゴム組成物を提供する。【解決手段】更生タイヤのクッションゴムに用いるゴム組成物であって、ゴム成分と、2種以上のジチオカルバミン酸塩系加硫促進剤と、を含み、ゴム成分100質量部に対するジチオカルバミン酸塩系加硫促進剤の含有量(質量部)が式(1)〔0.1≦促進剤A含有合量/(促進剤A含有量+促進剤B含有量)≦0.9〕を満たすゴム組成物。〔促進剤A及び促進剤Bは、(i)等のように定義する。(i)全ジチオカルバミン酸塩系加硫促進剤中、1番目に含有量が多いジチオカルバミン酸塩系加硫促進剤及び2番目に含有量が多いジチオカルバミン酸塩系加硫促進剤のうち、分子量が大きい方を促進剤A、他方を促進剤Bとする。〕【選択図】なし


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    Titel :

    RUBBER COMPOSITION USED IN CUSHION RUBBER FOR RETREADED TIRE AND RETREADED TIRE


    Weitere Titelangaben:

    更生タイヤ用クッションゴムに用いるゴム組成物及び更生タイヤ


    Beteiligte:

    Erscheinungsdatum :

    2018-01-18


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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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