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:
Oct. 29, 2019
Filed:
Aug. 23, 2016
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Klaus Lorenz, Dormagen, DE;
Christian Steinlein, Ratingen, DE;
Horst Zwick, Dormagen, DE;
Markus Bodenmüller, Krefeld, DE;
Stephan Eckelmann, Pulheim, DE;
Friedhelm Baer, Dormagen, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/26 (2006.01);
U.S. Cl.
CPC ...
C08G 65/2606 (2013.01); C08G 65/2663 (2013.01); C08G 65/2696 (2013.01); C08G 2650/24 (2013.01); C08G 2650/58 (2013.01);
Abstract
The invention relates to an efficient method for producing polyoxyalkylene polyols with equivalent molar masses between 9500 and 23000 g/mol from one or more H-functional starter compounds, and one or more alkylene oxides in the presence of a double metal cyanide catalyst, characterized in that the alkylene oxide metering rate is reduced once a calculated equivalent molar mass of between 8000 and 9500 g/mol is reached.