Method for the production of polyurethanes

US6906110B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Reinhard Lorenz · Schifferstadt, DE
• Stephan Bauer · Ostercappeln, DE
• Dieter Junge · Bischofswerda, DE
• Eva Baum · Schwarzheide, DE
• Kathrin Harre · Dresden, DE
• Jörg Erbes · Karlsruhe, DE
• Thomas Ostrowski · Mannheim, DE
• Georg Heinrich Grosch · Bad Dürkheim, DE

Key dates

• Filing date: Nov 4, 2000
• Grant date: Jun 14, 2005
• Expiry date: Mar 5, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for producing polyurethanes by reacting at least one polyisocyanate with at least one compound containing at least two hydrogen atoms which are reactive toward isocyanate groups, the compound having at least two active hydrogen atoms which is used is at least one polyether alcohol prepared by addition of alkylene oxides onto H-functional initiator substances by means of multimetal cyanide catalysis and the reaction is carried out in the presence of at least one metal salt.