Patent ID: 8765986
Filing Date: 2014-07-01
Classification: C08G

Abstract:
1. A process for continuously preparing silanes and/or organopolysiloxanes by hydrosilylation comprising: obtaining or providing at least one compound (A) containing at least one carbon-carbon multiple bond and at least one compound (B) having at least one Si—H functionality; and reacting the at least one compound (A) and at least one compound (B) by hydrosilylation in the presence of a hydrosilylation catalyst in a reaction mixing pump wherein the reaction mixing pump is of the peripheral wheel pump type and is equipped with: (a) a rotationally symmetric mixing chamber composed of a peripheral wall and two ends having annular channels connected to one another for flow purposes, (b) at least one inlet orifice to the mixing chamber, through which the compound(s) (A) is/are supplied, (c) at least one inlet orifice to the mixing chamber, through which compound(s) (B) is/are supplied, (d) a mixing rotor driven by magnetic coupling in the mixing chamber, which has chamfers arranged symmetrically at the ends, these forming pressure cells with the annular channels at the ends of the mixing chamber, and the pressure cells being connected to one another via passage bores in the mixing rotor, (e) an outlet orifice from the mixing chamber, through which the reaction mixture and/or the product is/are discharged from the reaction mixing pump, and (f) a temperature control circuit which can be controlled by an external heating or cooling unit.