METHOD FOR THE CONTINUOUS PREPARATION OF ORGANOPOLYSILOXANE EMULSIONS

摘要

Method and apparatus for preparing uniform highly dispersed emulsions by using a low drive power and without pressurization. They make possible the continuous mass production of uniform organopolysiloxane emulsions. An organopolysiloxane, water and a emulsifying agent, are continuously fed across a first-stage shearing and stirring device and a second-stage shearing and stirring device. The firststage device is a stator and turbine-type rotor whose blades are slanted obliquely from the radial direction when viewed from the axial direction. The second-stage device is a stator and turbine-type rotor whose blades define spiral curves with respect to the axial direction. The two devices are arranged serially and are separated from one another by a relaxation zone. Emulsification is carried out in the first-stage device by an intake and shearing action at a shear rate of at least 100/second, and in the second-stage device by a phase reversal, rotating effect and shearing action at a shear rate of at least 100/second.