Method for production of polyether alcohols

US6653441B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Kathrin Harre · Dresden, DE
• Gerd Hoppner · Schwarzheide, DE
• Georg Heinrich Grosch · Bad Dürkheim, DE
• Stephan Bauer · Ostercappeln, DE
• Jurgen Winkler · Schwarzheide, DE
• Els Paredis · Ranst, BE
• Reinhard Lorenz · Schifferstadt, DE
• Inge Rotermund · Ortrand, DE

Key dates

• Filing date: May 21, 2002
• Grant date: Nov 25, 2003
• Expiry date: May 21, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2696
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.