| 摘要 |
PURPOSE:To provide a rubber compsn. contg. silica blended therewith, which has improved processability, breaking strength, etc., by treating silica with low-temperature plasma by using an inorg. gas and using the resulting silica having improved dispersibility as silica to be blended with natural or synthetic diene rubber. CONSTITUTION:20-100pts.wt. silica (A) whose dispersibility is improved by a low-temperature plasma treatment for at least 3min by using an inorg. gas (e.g. nitrogen or oxygen) is blended with 100pts.wt. rubber component (B) selected from natural and synthetic diene rubbers (e.g. styrene/butadiene rubber or polyisoprene rubber) to obtain the titled rubber compsn. The number of OH groups on the surface of silica is reduced by the plasma treatment and hence cohesive force of silica particles is lowered, whereby dispersibility can be improved. The resulting rubber compsn. is suitable for use in the fields of tire parts, industrial products and materials requiring the blending with silica.
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