Patent ID: 8664321

Claim:
A continuous process for preparing organopolysiloxane compositions having a viscosity measured at 25° C. of at least 500 Pa·s., comprising mixing and kneading organopolysiloxanes and fillers, in a first process stage in a kneading cascade having at least two kneading chambers which are arranged in series next to one another and each contain two kneading tools which have parallel axes and are capable of being driven in corotating or counterrotating directions and which are connected to one another by means of openings through which material can pass in a direction transverse to the axes of the kneading tools, with the first kneading chamber having a feed opening and the last kneading chamber having a discharge opening, to give raw mixtures, and kneading and degassing the raw mixtures in a second process stage at from 100° C. to 250° C. in a continuously operated double trough kneader having a discharge screw.