Patent ID: 7829647
Filing Date: 2010-11-09
Classification: C08G,C08K

Abstract:
1. A process for the preparation of branched polysiloxanes, which comprises reaction of a straight-chain polyorganosiloxane of general formula (I) in which R are one or more, identical or different radicals selected from linear, cyclic or branched, saturated, mono- or polyunsaturated and/or aromatic hydrocarbon radicals having up to 200 carbon atoms, which may optionally carry one or more substituents selected from the group which consists of an optionally substituted heterocyclic group preferably containing one or more nitrogen atoms, amino, alkylamino, dialkylamino, ammonium, polyether, polyester and polyether ester radicals which may optionally contain one or more groups selected from —O—, —NR in which R R M R′ and R″, independently of one another, are H or R, x is an integer from 1 to 200, y is an integer from 1 to 100, in the presence of ammonium or metal carboxylates as a catalyst to afford a branched polysiloxane which contains at least one RSiO