RUBBER COMPOSITION AND PNEUMATIC TIRE USING THE SAME

To solve the problem that a low fuel consumption tire is placed on the market in the industry due to enhanced environmental consciousness and a labeling system, for this reason, there is a method for highly dispersing a filler such as a silica, but it has a problem in reducing hardness and impairing...

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1. Verfasser: KITAMURA OMIMASA
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To solve the problem that a low fuel consumption tire is placed on the market in the industry due to enhanced environmental consciousness and a labeling system, for this reason, there is a method for highly dispersing a filler such as a silica, but it has a problem in reducing hardness and impairing steering stability, on the contrary, there is also a method for reducing a blended amount of the filler, but it has a problem in causing insufficient rigidity required for a tire; and generally, any performance such as low rolling resistance, hardness and abrasion resistance is positioned at ambivalent characteristics, and accordingly it is a difficult matter in the industry to simultaneously satisfy these characteristics.SOLUTION: A rubber composition is formed by blending 1-15 pts.mass of crosslinked polystyrene particles with respect to 100 pts.mass of a diene-based rubber which contains a styrene-butadiene copolymer rubber and has an amount styrene derived from the styrene-butadiene copolymer rubber of 20 pts.mass or more.SELECTED DRAWING: Figure 1 【課題】近年、環境意識の高まりやラベリング制度を受けて、当業界では低燃費タイヤが上市されている。そのため、シリカなどの充填剤を高分散化する方法があるが、硬度が低下し、操縦安定性を損なうという問題点がある。一方、充填剤の配合量を減らす方法もあるが、タイヤに求められる剛性が不足するという問題点があった。一般的に低転がり抵抗性、硬度、耐摩耗性の性能はいずれも背反特性に位置するため、これらの特性を同時に満足させることは当業界で困難な事項とされている。【解決手段】スチレン−ブタジエン共重合体ゴムを含み、かつ前記スチレン−ブタジエン共重合体ゴムに由来するスチレン量が20質量部以上であるジエン系ゴム100質量部に対し、架橋ポリスチレン粒子を1〜15質量部配合してなるゴム組成物によって前記課題を解決した。【選択図】図1