To provide a rubber composition for tires that is effective in protecting tires from aging during its long-term use and also can prevent the tires from deteriorating in appearance due to coloring.SOLUTION: A rubber composition for tires contains diene rubber, carbon black and/or silica, and a sustained-release porous inorganic particle for sustainedly releasing an age resister. The sustained-release porous inorganic particle includes a porous inorganic particle, an age resister incorporated into a pore of the porous inorganic particle, and a silicone-based resin sealing the age resister in the pore. In the sustained-release porous inorganic particle, the content of the age resister is 20-70 mass%. The content of the sustained-release porous inorganic particles is 0.1-10 pts.mass expressed as the amount of the age resister relative to 100 pts.mass of the diene rubber.SELECTED DRAWING: None
【課題】タイヤの長期使用に対して優れた老化防止効果を示し、かつタイヤの着色による外観劣化も防止可能なタイヤ用ゴム組成物を提供する。【解決手段】ジエン系ゴムと、カーボンブラックおよび/またはシリカと、老化防止剤を徐放する徐放性多孔質無機粒子とを配合してなり、前記徐放性多孔質無機粒子は、多孔質無機粒子と、前記多孔質無機粒子の孔内に取り込まれた老化防止剤と、前記孔内において前記老化防止剤を封止しているシリコーン系樹脂とを含み、前記徐放性多孔質無機粒子中の前記老化防止剤の割合が、20~70質量%であり、前記徐放性多孔質無機粒子の配合量が、前記ジエン系ゴム100質量部に対し、前記老化防止剤量として0.1~10質量部であるタイヤ用ゴム組成物によって上記課題を解決した。【選択図】なし
RUBBER COMPOSITION FOR TIRES AND TIRE INCLUDING THE SAME
タイヤ用ゴム組成物およびそれを用いたタイヤ
2023-03-24
Patent
Electronic Resource
Japanese
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / 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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