Siloxane block copolymers having linked siloxane blocks

US6730749B1 · kind B1 · utility

Assignee

• GOLDSCHMIDT HOLDING GMBH · DE

Inventors

• Georg Burkhart · Essen, DE
• Rolf-Dieter Langenhagen · Hattingen, DE
• Andreas Weier · Essen, DE

Key dates

• Filing date: Apr 12, 2000
• Grant date: May 4, 2004
• Expiry date: Jun 18, 2021

Classification

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

Abstract

The invention relates to novel siloxane block copolymers of the general average formula having linked, different siloxane blocks and their use as surface-active agents, in particular as additives in the preparation of polyurethane foams.