Method for producing polyesterpolyols of polyvalent alcohols

US7241914B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Alexander Wartini · Heidelberg, DE
• Matthias Dernbach · Eppelheim, DE
• Gerlinde Tischer · Ruhland, DE
• Tilman Sirch · Schifferstadt, DE

Key dates

• Filing date: May 21, 2003
• Grant date: Jul 10, 2007
• Expiry date: May 21, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/78
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a process for preparing polyester polyols of polyhydric alcohols by mono- or polyesterification of at least one carboxylic acid having at least two acid groups and/or at least one derivative of a dicarboxylic acid with polyhydric alcohols, optionally with the addition of a catalyst, while removing the water of reaction, wherein the polyhydric alcohol used has a formaldehyde acetal content of less than 500 ppm.