Patent · US Expired

Bi-metallic-cyanide catalysts used for preparing polyether polyols

US6391820B1 · kind B1 · utility

14Cited by

11References

12Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Pieter Ooms · Krefeld, DE
Jörg Hofmann · Krefeld, DE
Pramod Gupta · Bedburg, DE
Walter Schafer · Leichlingen, DE

Key dates

Filing date	Jan 23, 2001
Grant date	May 21, 2002
Priority date	—
Expiry date	Jan 23, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J27/26
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to novel double-metal cyanide catalysts for the preparation of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, wherein the catalyst contains a) double metal cyanide compounds, b) organic complex ligands other than c), and c) glycoside. The catalysts according to the invention have greatly increased activity in the preparation of polyether polyols.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.