Method for producing branched SiH functional polysiloxanes and the use thereof for producing SiC- and SiOC-linked, branched organomodified polysiloxanes

US8598295B2 · kind B2 · utility

Assignee

• EVONIK GOLDSCHMIDT GMBH · DE

Inventors

• Frauke Henning · Essen, DE
• Wilfried Knott · Essen, DE
• Horst Dudzik · Essen, DE

Key dates

• Filing date: Sep 23, 2008
• Grant date: Dec 3, 2013
• Expiry date: Jun 29, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/46
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for preparing branched SiH-functional siloxanes by converting a mixture of one or more low molecular weight SiH-functional siloxanes, one or more low molecular weight SiH-free siloxanes and one or more trialkoxysilanes with addition of water and in the presence of at least one Brønsted-acidic catalyst, which is characterized in that the reaction is performed in one process step.