| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new filler for reinforcement used for a rubber composition for a tire with excellent low fuel consumption and wear resistance while maintaining reduced rolling resistance, and the rubber composition using the filler. Ž<P>SOLUTION: As the filler, a porous particle having a penetrated pore, the particle having the penetrated pore with an enough size to allow a polymer molecule to enter, an average pore size of 1-1,000 nm, and an average particle size of 2-2,000 nm is used. The porous particle is carbon black or a particle of an inorganic compound represented by following general formula, mM1-xSiOy-zH<SB>2</SB>O (I). Wherein, M1 is at least one metal, metal oxide, or metal hydroxide selected from Al, Mg, Ti, or Ca, and m, x, y, and z are an integer of 0-5, an integer of 0-10, an integer of 2-5, and an integer of 0-10, respectively. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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