Patent · US Expired

Double metal cyanide catalysts for preparing poly-etherpolyols

US6204357A · kind A · utility

19Cited by

12References

13Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Pieter Ooms · Krefeld, DE
Jörg Hofmann · Krefeld, DE
Pramod Gupta · Bedburg, DE
Lambertus Groenendaal · Sinaai, BE

Key dates

Filing date	Feb 10, 2000
Grant date	Mar 20, 2001
Priority date	—
Expiry date	Feb 10, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08B37/0015
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention is directed to new double metal cyanide (DMC) catalysts, a process for the preparation of these catalysts, and to a process for the preparation of polyetherpolyols by the polyaddition of alkylene oxides to starter compounds which contain active hydrogen atoms, wherein the catalyst comprises the novel double metal cyanide (DMC) catalyst of the present invention. These new double metal cyanide (DMC) catalysts comprise a) one or more double metal cyanide compounds, b) one or more organic complex ligands, and c) one or more cyclodextrins, with the proviso that b) and c) are different compounds. The catalysts of this invention exhibit greatly increased activity during preparation of a polyetherpolyol.

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