Patent ID: 7671125

Claim:
A continuous process for preparing HTV-organopolysiloxane compositions (A) having a viscosity measured at 25° C. of at least 500 Pa·s., comprising mixing and kneading organopolysiloxanes (O), fillers (F), and optionally a structure improver in a first process stage in a kneading cascade having at least two kneading chambers which are arranged in series adjacent one another, each containing two kneading tools having parallel axes and capable of being driven in co-rotating or counter-rotating directions, said chambers connected to one another by means of openings through which material passes in a direction transverse to the axes of the kneading tools, at least the first kneading chamber having a feed opening and the last kneading chamber having a discharge opening, to provide a raw organopolysiloxane mixture, and directly feeding the raw organopolysiloxane mixture from the discharge opening into a reciprocating kneader wherein the raw mixture is kneaded and degassed.