Process for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and prepolymers thereof

US6977290B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hartmut Nefzger · Pulheim, DE
• Erika Bauer · Höchst im Odenwald, DE
• Manfred Schmidt · Krefeld, DE
• Hans-Dieter Ruprecht · Neunburg vorm Wald, DE
• James-Michael Barnes · Breitscheid, DE

Key dates

• Filing date: Jan 22, 2004
• Grant date: Dec 20, 2005
• Expiry date: Jan 22, 2024

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/34
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a method for preparing oligomeric aliphatic diols, polycarbonatediols based thereon and NCO-terminated prepolymers obtainable therefrom. The inventive compounds may find use in the preparation of polyurethanes.