To provide a molded bale of a rubber composition that is difficult to cold flow, and is difficult to be thermally deteriorated during production, and in which rigidity at 50°C of a crosslinking rubber composition obtained therefrom is difficult to be low, and a change in tensile strength of the crosslinking rubber composition after thermal history is small.SOLUTION: The rubber composition contains: a rubber-like polymer (A) having an iodine value of 10 to 250, 3 mass% or more of an ethylene structure, and less than 10 mass% of a vinyl aromatic monomer block; aluminum (B); and nickel and/or cobalt (C), in which a content of the aluminum (B) is 2 ppm or more and 200 ppm or less, and a content of the nickel and/or cobalt (C) is 3 ppm or more and 100 ppm or less.SELECTED DRAWING: None
【課題】成形体がコールドフローし難く、製造中に熱劣化し難く、架橋用ゴム組成物の50℃の剛性が低くなり難く、架橋用ゴム組成物の熱履歴後の引張強度変化が小さい、ゴム組成物のベール成形体を得る。【解決手段】ヨウ素価が10~250であり、エチレン構造≧3質量%であり、かつ、ビニル芳香族単量体ブロック<10質量%であるゴム状重合体(A)と、アルミニウム(B)と、ニッケル及び/又はコバルト(C)と、を、含有し、2ppm≦アルミニウム(B)の含有量≦200ppmであり、3ppm≦ニッケル及び/又はコバルト(C)の含有量≦100ppmである、ゴム組成物。【選択図】なし
MOLDED BALE OF RUBBER COMPOSITION, METHOD FOR PRODUCING MOLDED BALE, CROSSLINKING RUBBER COMPOSITION, AND TREAD FOR TIRE
ゴム組成物のベール成形体、ベール成形体の製造方法、架橋用ゴム組成物、及びタイヤ用トレッド
2022-01-13
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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