METHOD AND DEVICE FOR THE CONTINUOUS COAGULATION OF AQUEOUS DISPERSIONS OF GRAFT RUBBERS

摘要

The invention relates to a method for the continuous coagulation of aqueous dispersions of graft rubbers suitable for modifying thermoplastic materials with a view to improving their impact resistance. According to said method, the dispersions are fed through a device comprising at least one shear element and a slotted stator containing a turning rotor in such a way that they are directed by the rotation of the rotor radially from the interior to the exterior within the shear element, and that after or during their movement through the stator and rotor slots they are sheared with such force that they coagulate. This method yields readily usable graft rubber coagulates even if the solid matter has an elastomer content of over 50 weight percent.