Preparation of an aggregate comprising a carbon phase, a silica-containing species phase and/or a metal-containing species phase, in a multistage reactor

摘要

This method of making a multi-phase aggregate involves introducing a first feedstock into a first stage (9) of a multi-stage reactor, and introducing a second feedstock into the reactor at a location (10) downstream of the first stage. The first and second feedstocks comprise a carbon black-yielding feedstock, and at least one feedstock also comprises a silicon-containing compound. The reactor is operated at a sufficient temperature to decompose the silicon-containing compound and to pyrolize the carbon black-yielding feedstock. An alternative method of making the aggregate involves a multi-stage reactor having at least three stages for introducing a feedstock, wherein at least one of the feedstocks comprises a carbon black-yielding feedstock and wherein at least one of the feedstocks comprises a silicon-containing compound. Besides producing the aggregate comprising a carbon phase and a silicon-containing species phase, silica and/or carbon black may also result from the process. A further alternative involves making an aggregate comprising a carbon phase and a metal-containing species phase using a multi-stage reactor having at least two stages for introducing feedstocks. At least one of the feedstocks comprises a carbon black-yielding feedstock and another comprises a metal-containing compound. The aggregates when incorporated into elastomeric compositions preferably lead to improved wet skid resistance and rolling resistance properties.