Treatment for polyether polyols

US6245947A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernd Guettes · Sallgast, DE
• Gerd Hoeppner · Schwarzheide, DE
• Monika Wetterling · Senftenberg - Zły Komorow, DE
• Heinz Auer · Neulußheim, DE
• Jens Bruhn · Ludwigshafen, DE
• Stefan Dinsch · Schipkau, DE
• Juergen Winkler · Langenfeld, DE

Key dates

• Filing date: Mar 9, 1998
• Grant date: Jun 12, 2001
• Expiry date: Mar 9, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/30
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for treating polyether polyols prepared in a conventional manner by base-catalyzed reaction of H-functional initiator substances with alkylene oxides comprises a combination of a thermal-reactive step at a pH of less than 7 and a temperature above 60.degree. C. and a thermal-distillative step in a countercurrent column using a purifying agent. The polyether polyols prepared according to the invention are used for producing low-fogging and low-odor PUR foams.