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:
Sep. 22, 2015
Filed:
Jun. 26, 2012
Applicants:
Klaus Lorenz, Dormagen, DE;
Jörg Hofmann, Krefeld, DE;
Horst Zwick, Dormagen, DE;
Christian Steinlein, Ratingen, DE;
Edward Browne, Köln, DE;
Inventors:
Klaus Lorenz, Dormagen, DE;
Jörg Hofmann, Krefeld, DE;
Horst Zwick, Dormagen, DE;
Christian Steinlein, Ratingen, DE;
Edward Browne, Köln, DE;
Assignee:
BAYER INTELLECTUAL PROPERTY GMBH, Monheim, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 65/26 (2006.01);
U.S. Cl.
CPC ...
C08G 65/2609 (2013.01); C08G 65/2663 (2013.01); C08G 65/2696 (2013.01);
Abstract
The invention relates to a process for the preparation of polyether polyols with equivalent molecular weights of from 8,000 to 20,000 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 oxides are metered into the reactor in the course of from 15 to 23 h.