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:
Dec. 30, 2003
Filed:
Feb. 19, 2002
Jörg Hofmann, Krefeld, DE;
Stephan Ehlers, Newtown Square, PA (US);
Bernd Klinksiek, Bergisch Gladbach, DE;
Bert Klesczewski, Düsseldorf, DE;
Christian Steinlein, Ratingen, DE;
Lars Obendorf, Köln, DE;
Harald Pielartzik, Krefeld, DE;
Jose F. Pazos, Havertown, PA (US);
Other;
Abstract
The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising conducting a reaction mixture at least once through a zone which has an energy density of at least 5×10 J/m , wherein the dwell time of the reaction mixture in this zone is at least 10 seconds per pass.