Polyether ester amides

US6344535B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ralf Timmermann · Krefeld, DE
• Wolfgang Schulz-Schlitte · Langenfeld, DE
• Michael J. Voigt · Chaska, US

Key dates

• Filing date: May 18, 2000
• Grant date: Feb 5, 2002
• Expiry date: May 18, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/44
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyether ester amides having high water vapor permeability are disclosed. The amides which are prepared simply and reliably, crystallize quickly, are biodegradable and/or compostable, and are suitable in the manufacture of films by extrusion.