Patent · US Active

Process for the production of polyether carbonate polyols

US9315622B2 · kind B2 · utility

9Cited by

14References

8Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Jörg Hofmann · Krefeld, DE
Christoph Gürtler · Cologne, DE
Stefan Grasser · Leverkusen, DE
Aurel Wolf · Wülfrath, DE

Key dates

Filing date	Jul 16, 2012
Grant date	Apr 19, 2016
Priority date	—
Expiry date	Dec 14, 2032

Classification

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

Abstract

The present invention relates to a method for producing polyether carbonate polyols from one or more H-functional starter substances, one or more alkylene oxides and carbon dioxide, in the presence of at least one double metal cyanide (DMC) catalyst, wherein the double metal cyanide catalyst comprises a complex-forming component selected from the group consisting of polycarbonate diol, polyether carbonate polyol, polyethylene glycol diol and poly(tetramethylene ether diol).

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