Henkel Ag & Company, Kgaa

Marleen Winterberg

Johann Klein

Udo Kragl

Esteban Mejia

Ralf Dunekake

David Briers

Christina Despotopoulou

Annika Dietrich

Henrik Lund

Jens Baumgard

Marta Woznicka

A method for producing a hydroxyl-functionalized polysiloxane having secondary or tertiary hydroxyl groups, said method comprising the steps of:  

Process for the preparation of hydroxyl-functionalized polysiloxanes

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

Marleen Winterberg