PROBLEM TO BE SOLVED: To provide a rubber composition having a cavity capable of functioning as a drain ditch by easily melting and foaming it during vulcanization, a vulcanized rubber and a tire using them.SOLUTION: The rubber composition is a rubber composition containing a rubber component and a hydrophilic resin, a cavity is formed in the rubber component, the hydrophilic is coated on an inner face of the cavity, a resin having affinity to the rubber composition is coated on at least a part around the hydrophilic resin, the rubber composition contains further a foaming agent, the rubber composition containing the foaming agent is foamed by mixing and vulcanization, the resin having affinity to the rubber component is a low melting point resin having lower melting point than a maximum vulcanization temperature and an average diameter of the cavity is 0.01 to 1 mm. The tire uses the rubber composition or the vulcanized rubber for a tread member.
【課題】加硫時に容易に溶融発泡することにより、排水溝として機能し得る空洞を有するゴム組成物、加硫ゴム、及びそれらを用いたタイヤを提供すること。【解決手段】本発明のゴム組成物は、ゴム成分と親水性樹脂とを含むゴム組成物であって、前記ゴム成分内に空洞が形成され、前記空洞の内壁面に前記親水性樹脂が被覆され、前記親水性樹脂の周囲の少なくとも一部に、前記ゴム成分に対して親和性を有する樹脂が被覆され、前記ゴム組成物は、さらに発泡剤を含み、該発泡剤を含むゴム組成物は、混練り及び加硫により発泡し、前記ゴム成分に対して親和性を有する樹脂は、最高加硫温度よりも低い融点を有する低融点樹脂であり、前記空洞の平均径が0.01〜1mmであることを特徴とする。さらに、本発明のタイヤは、本発明のゴム組成物、又は本発明の加硫ゴムをトレッド部材に用いることを特徴とする。【選択図】なし
RUBBER COMPOSITION, VULCANIZED RUBBER AND TIRE USING THEM
ゴム組成物、加硫ゴム、及びそれらを用いたタイヤ
2015-05-28
Patent
Electronic Resource
Japanese
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