Method for producing polyester polyols having low amounts of dioxane waste

US8592623B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Rolf Roers · Odenthal, DE
• Hartmut Nefzger · Pulheim, DE
• Erika Bauer · Höchst im Odenwald, DE
• Johannes Van De Braak · Hennef (Sieg), DE
• Torsten Heinemann · Tarragona, ES
• Jürgen Schloβmacher · Bergheim, DE

Key dates

• Filing date: Nov 3, 2009
• Grant date: Nov 26, 2013
• Expiry date: May 3, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24999
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyester polyols are produced from at least one carboxylic acid hydride and diethylene glycol by a process in which the formation of 1,4-dioxane is suppressed. These polyester polyols are useful for producing polyurethane (PUR) and polyisocyanurate (PIR) foams and metal composite elements containing these PUR or PIR foams.