Patent ID: 8268921
Filing Date: 2012-09-18
Classification: C08K,C08L

Abstract:
1. An elastomeric composition (C1) containing at least one butadienic elastomer E, which contains precipitated silica S1 as at least one reinforcing filler and at least one coupling agent, wherein: the butadienic elastomer E comprises a functionalized butadienic elastomer prepared in solution, which is modified by at least one polyfunctional coupling agent having an alkoxy silane group; and said precipitated silica S1 is prepared by a process including a precipitation reaction of a silicate with an acidifying agent, whereby a suspension of precipitated silica is obtained, and then the separation and the drying of this suspension, wherein: the precipitation reaction is carried out in the following manner: a suspension which has a solids content of not more than 24% by weight is dried, and said process further including one of the following steps (a1) or (b1):