Henkel Ag & Company, Kgaa

Jens Baumgard

Johann Klein

Udo Kragl

Esteban Mejia

Andrea Gutacker

Helene Boudet

Ralf Dunekake

David Briers

Henrik Lund

Kerstin Unger

Marleen Winterberg

This disclosure relates to a zinc complex formula (I), as defined herein, to the use of this zinc complex as a catalyst, in particular for the catalysis of a condensation reaction of organosilicon compounds. This disclosure also relates to preparations containing said compounds and to the use thereof.

Organic zinc complexes as catalysts for condensation reactions

The present invention relates to a method for preparing functionalized cyclosiloxanes of Formula I, wherein R, R, R, m, n1 and n2 are as defined herein, comprising reacting (i) a cyclosiloxane of Formula II with (ii) a substituted acetylene of Formula III in the presence of a hydrosilylation catalyst. The invention further relates to methods for preparing biscyclosiloxanes by reacting the vinyl cyclosiloxanes obtained according to the described methods and the (bis)cyclosiloxanes obtainable according to the described methods.

Method for the preparation of functionalized cyclosiloxanes

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Rostock, Germany

Jens Baumgard