Aliphatic polycarbonate homo-and co-polymers produced by DMC catalysis and the process for their production

US6646100B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jörg Hofmann · Krefeld, DE
• Walter Schafer · Leichlingen, DE
• Christian Steinlein · Ratingen, DE

Key dates

• Filing date: Jul 30, 2002
• Grant date: Nov 11, 2003
• Expiry date: Jul 30, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G64/183
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aliphatic polycarbonate homo- and co-polymers are obtained by ring-opening homo- or co-polymerization of cyclic carbonates by DMC catalysis. These polymers are useful in the production of polyurethanes.