Polyester polyols, a process for the production thereof and the use thereof

US7763683B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Hartmut Nefzger · Pulheim, DE
• Gerhard Klein · Monheim, DE
• Manfred Schmidt · Krefeld, DE
• Jens Krause · Rahden, DE
• James-Michael Barnes · Breitscheid, DE
• Erika Bauer · Höchst im Odenwald, DE

Key dates

• Filing date: Oct 2, 2007
• Grant date: Jul 27, 2010
• Expiry date: Oct 2, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/7678
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to polyester polyols with low functionality and a process for their production, to prepolymers prepared from these polyester polyols and a process for their production, and to polyurethanes prepared from these polyester polyols and/or from these prepolymers, and to processes for their production. These polyester polyols are produced in a two-step process. In the second step of this two-step process, one or more cyclic ester monomers is reacted with one or more polyester polyols at low temperatures.