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. 12, 2016
Filed:
Jul. 16, 2012
Thomas Ernst Müller, Aachen, DE;
Christoph Gürtler, Köln, DE;
Yvonne Dienes, Hannover, DE;
Julien Barruet, Fresnes, FR;
Burkhard Köhler, Zierenberg, DE;
Walter Leitner, Aachen, DE;
Thomas Ernst Müller, Aachen, DE;
Christoph Gürtler, Köln, DE;
Yvonne Dienes, Hannover, DE;
Julien Barruet, Fresnes, FR;
Burkhard Köhler, Zierenberg, DE;
Walter Leitner, Aachen, DE;
Bayer Intellectual Property GmbH, Leverkusen, DE;
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 (CO) 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