Crystalline double metal cyanide catalysts for producing polyether polyols

US6323375A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jörg Hofmann · Krefeld, DE
• Pramod Gupta · Bedburg, DE
• Robert J. Kumpf · Pittsburgh, US
• Pieter Ooms · Krefeld, DE
• Walter Schafer · Leichlingen, DE
• Michael Schneider

Key dates

• Filing date: Apr 5, 2000
• Grant date: Nov 27, 2001
• Expiry date: Apr 5, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J27/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to highly active, substantially crystalline double metal cyanide (DMC) catalysts, a process for the preparation of these double metal cyanide catalysts, a process for producing polyether polyols by the polyaddition of alcohol ethers onto starter compounds containing active hydrogen atoms from these DMC catalysts, and to the polyether polyols produced by this process. The DMC catalysts of the invention comprise a) double metal cyanide compounds, b) organic complexing ligands, and c) functionalized polymers. These catalysts exhibit increased activity in the process for the production of polyether polyols.