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:
Aug. 17, 2004
Filed:
Feb. 19, 2002
Applicant:
Inventors:
Jörg Hofmann, Krefeld, DE;
Stephan Ehlers, West Chester, PA (US);
Bernd Klinksiek, Bergisch Gladbach, DE;
Lars Obendorf, Köln, DE;
Christian Steinlein, Ratingen, DE;
Bert Klesczewski, Düsseldorf, DE;
Jose F. Pazos, Havertown, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 1/810 ; C09K 3/00 ;
U.S. Cl.
CPC ...
C08G 1/810 ; C09K 3/00 ;
Abstract
The present invention relates to a process for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds containing active hydrogen atoms conducted in the presence of a double-metal cyanide catalyst wherein a reaction mixture is guided at least once through a zone which has an energy density of at least 10 J/m and wherein the residence time of the reaction mixture in this zone is at least 10 seconds per pass.