| 摘要 |
PURPOSE:A composition wherein processing properties are improved by reducing viscosity of an unvulcanized rubber composition without changing physical properties of vulcanized rubber, obtained by blending rubber with a polymer or copolymer of a 2-(trialkoxysilyl)-1,3 butadiene. CONSTITUTION:(A) 100pts.wt. rubber blended with (B) 0.5-50pts.wt. of (i) a 2-(trialkoxysilyl)-1,3 butadiene polymer and/or (ii) a copolymer obtained by subjecting a 2-(trialkoxysilyl)-1,3 butadiene, another conjugated diene and/or an aromatic vinyl compound to solution polymerization in the presence of a radical catalyst or an anionic catalyst, (C) 5-200pts.wt. white carbon (wet silica, dry silica or synthetic silicate) and, if necessary, another filler, a reinforcing agent, a softener, etc., to give the aimed rubber composition.
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