Crosslinked polyether-siloxane block copolymers and their use for producing polyurethane foams

US11965064B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Michael Klostermann · Essen, DE
• Michael Ferenz · Essen, DE
• Kai-Oliver Feldmann · Essen, DE
• Marvin Jansen · Essen, DE
• Michelle Fluder · Dortmund, DE
• Sina Arnold · Bottrop, DE
• Petra Schnell · Essen, DE

Key dates

• Filing date: Feb 8, 2019
• Grant date: Apr 23, 2024
• Expiry date: May 1, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2312/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Crosslinked polyether siloxane block copolymers are obtained by reacting an alpha-omega hydrogen siloxane with at least one higher-order hydrogen siloxane and at least one polyether in the presence of a hydrosilylation catalyst. These are described, and also use thereof as additives for producing polyurethane foams, particularly mechanically foamed polyurethane foams.