To provide a rubber composition capable of providing excellent tear strength and suppressing deterioration of crack resistance compared to the case that silica is mixed, without need of addition of a compound or denaturation of a rubber component during rubber component synthesis, a pneumatic tire using the same, and a manufacturing method of the rubber composition.SOLUTION: There is provided a rubber composition containing a diene rubber, and a fine particle by covering rotaxane having a linear molecule, a cyclic molecule including the linear molecule, and an encapsulation group arranged at both terminals of the linear molecule so that the cyclic molecule is not detached from the linear molecule with silica, in which content of the fine particle is 1 to 50 pts.mass based on 100 pts.mass of the diene rubber.SELECTED DRAWING: None
【課題】ゴム成分合成時の化合物の添加やゴム成分の変性を要さず、優れた引き裂き強度が得られ、シリカを配合した場合と比較し耐亀裂性の悪化を抑制できるゴム組成物、及びそれを用いた空気入りタイヤ、並びにゴム組成物の製造方法を提供する。【解決手段】ジエン系ゴムと、直鎖状分子と、上記直鎖状分子を包接する環状分子と、上記直鎖状分子から上記環状分子が脱離しないように、上記直鎖状分子の両末端に配置された封鎖基とを有するロタキサンを、シリカで被覆した微粒子とを含有し、上記微粒子の含有量が、ジエン系ゴム100質量部に対して1〜50質量部である、ゴム組成物とする。【選択図】なし
RUBBER COMPOSITION, PNEUMATIC TIRE USING THE SAME, AND MANUFACTURING METHOD OF RUBBER COMPOSITION
ゴム組成物、及びそれを用いた空気入りタイヤ、並びにゴム組成物の製造方法
2020-04-02
Patent
Elektronische Ressource
Japanisch
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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