Patent ID: 7759446
Filing Date: 2010-07-20
Classification: C08G

Abstract:
1. A batch process for preparing organopolysiloxanes having aminoalkyl groups comprising (i) reacting at a temperature of at least 60° C., (ii) deactivating the basic catalyst(s) (C) and (iii) cooling the reaction products to a temperature below 60° C., the cooling (iii) being effected before, during or after the deactivation (ii) of the catalysts, with the proviso that the process is performed in at least two successive stirred tanks, the reaction (i) and the cooling (iii) proceeding separately in different stirred tanks wherein the reaction (i) is carried out in a first stirred tank and the deactivation (ii) and cooling (iii) in a downstream second stirred tank, with the further proviso that, while the deactivation (ii) and the cooling (iii) proceed in the second stirred tank, the reaction (i) of reactants newly supplied to the first stirred tank is simultaneously proceeding in the first stirred tank.