Method for the polymerization of cyclic ethers

US7544766B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Stephan Schlitter · Schifferstadt, DE
• Martin Haubner · Ludwigshafen am Rhein, DE
• Peter Zehner · Ludwigshafen, DE
• Michael Hesse · Westlake Village, US
• Alexander Weck · Freinsheim, DE
• Rolf Pinkos · Bad Dürkheim, DE
• Thomas Graβler · Schifferstadt, DE

Key dates

• Filing date: Dec 23, 2003
• Grant date: Jun 9, 2009
• Expiry date: Aug 3, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2657
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for preparing polytetrahydrofuran, polytetrahydrofuran copolymer, diester or monoester by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer and of an acidic heterogeneous catalyst based on activated sheet silicates or mixed metal oxides in a fluidized bed.