Preparation of recyclate polyols, and the use thereof in the preparation of polyurethanes

US5357006A · kind A · utility

Assignee

• BASF Schwarzheide GmbH · DE

Inventors

• Michael Gassan · Senftenberg - Zły Komorow, DE
• Bernhard Naber · Schwarzheide, DE
• Vera Neiss · Schwarzheide, DE
• Peter Moeckel · Munich, DE
• Wolfgang Weissflog · Halle, BE

Key dates

• Filing date: Oct 7, 1993
• Grant date: Oct 18, 1994
• Expiry date: Oct 7, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of recyclate polyols obtained by glycolysis of polyurethanes and/or polyurea-polyurethanes comprises metering in monofunctional and/or difunctional glycidyl ethers over the entire course of the reaction; the low-amine recyclate polyols obtained in this way are used for the preparation of cellular or noncellular polyurethanes.