Production of SiOC-bonded polyether siloxanes

US10414872B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Wilfried Knott · Essen, DE
• Horst Dudzik · Essen, DE
• Olga Fiedel · Essen, DE
• Philippe Favresse · Ratingen, DE
• Ute Hesse · Essen, DE

Key dates

• Filing date: Jul 9, 2018
• Grant date: Sep 17, 2019
• Expiry date: Jul 9, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/70
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing SiOC-bonded polyether siloxanes by transesterification of alkoxysiloxanes with polyetherols in the presence of zinc acetylacetonate as catalyst is described.