The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 2016
Filed:
Jul. 16, 2012
Jörg Hofmann, Krefeld, DE;
Christoph Gürtler, Köln, DE;
Stefan Grasser, Leverkusen, DE;
Aurel Wolf, Wülfrath, DE;
Jörg Hofmann, Krefeld, DE;
Christoph Gürtler, Köln, DE;
Stefan Grasser, Leverkusen, DE;
Aurel Wolf, Wülfrath, DE;
Covestro Deutschland AG, Leverkusen, DE;
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).