Patent · US Active

Method for activating double metal cyanide catalysts for the production of polyether carbonate polyols

US9309356B2 · kind B2 · utility

2Cited by

9References

15Claims

0Family size

Assignee

Bayer Intellectual Property GmbH · DE

Inventors

Thomas Ernst Müller · Aachen, DE
Christoph Gürtler · Cologne, DE
Yvonne Dienes · Hannover, DE
Julien Barruet · Fresnes, FR
Burkhard Kohler · Leverkusen, DE
Walter Leitner · Aachen, DE

Key dates

Filing date	Jul 16, 2012
Grant date	Apr 12, 2016
Priority date	—
Expiry date	Nov 8, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/2663
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for the activation of double metal cyanide (DMC) catalysts with heterocumulenes for the preparation of polyether carbonate polyols by catalytic copolymerization of carbon dioxide (CO2) with alkylene oxides in the presence of one or more H-functional starter substances, and to a process for the preparation of polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide in the presence of a double metal cyanide catalyst, characterized in that

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