PROBLEM TO BE SOLVED: To provide a rubber composition for a tire rim cushion or a gum finishing excellent in low heat generation properties and wear resistance.SOLUTION: Provided is a rubber composition for a tire rim cushion or a gum finishing containing a diene rubber, carbon black and silica, in which the diene rubber includes a modified polymer obtainable by reacting a natural rubber and/or an isoprene rubber and a conjugated diene polymer with a nitrone compound, in the diene rubber, the content of the natural rubber and/or the isoprene rubber is 30 to 60 mass%, the content of the modified polymer is 8 to 70 mass%, the nitrogen adsorption specific surface area of the carbon black is 60 to 150 m/g, to 100 pts.mass of the diene rubber, the content of the carbon black is 5 to 85 pts.mass, the content of the silica is 5 to 85 pts.mass, and the total content of the carbon black and the silica is 60 to 90 pts.mass.
【課題】低発熱性及び耐摩耗性に優れるタイヤリムクッション又はガムフィニッシング用ゴム組成物の提供。【解決手段】ジエン系ゴムとカーボンブラックとシリカとを含有し、前記ジエン系ゴムが天然ゴム及び/又はイソプレンゴムと共役ジエン重合体にニトロン化合物を反応させて得られる変性ポリマーとを含み、前記ジエン系ゴム中、前記天然ゴム及び/又は前記イソプレンゴムの含有量が30〜60質量%であり、前記変性ポリマーの含有量が8〜70質量%であり、前記カーボンブラックの窒素吸着比表面積が60〜150m2/gであり、前記ジエン系ゴム100質量部に対して、前記カーボンブラックの含有量が5〜85質量部であり、前記シリカの含有量が5〜85質量部であり、前記カーボンブラックと前記シリカとの合計含有量が60〜90質量部である、タイヤリムクッション又はガムフィニッシング用ゴム組成物。【選択図】なし
RUBBER COMPOSITION FOR TIRE RIM CUSHION OR GUM FINISHING, AND PNEUMATIC TIRE
タイヤリムクッションまたはガムフィニッシング用ゴム組成物および空気入りタイヤ
2015-12-07
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / 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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