Double metal cyanide catalysts for producing polyether polyols

US7008900B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Jörg Hofmann · Krefeld, DE
• Pieter Ooms · Krefeld, DE
• Pramod Gupta · Bedburg, DE
• Walter Schafer · Leichlingen, DE
• John Lohrenz · Leverkusen, DE

Key dates

• Filing date: Jan 31, 2000
• Grant date: Mar 7, 2006
• Expiry date: Jan 31, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2663
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention provides new double metal cyanide (DMC) catalysts for preparing polyetherpolyols by the polyaddition of alkylene oxides to starter compounds which contain active hydrogen atoms, wherein the catalyst comprises a) double metal cyanide compounds, b) bile acids or their salts, esters or amides and c) organic complex ligands. The catalysts according to the invention show greatly increased activity during preparation of a polyetherpolyol.