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:
Nov. 25, 2003
Filed:
May. 21, 2002
Kathrin Harre, Dresden, DE;
Gerd Höppner, Schwarzheide, DE;
Georg Heinrich Grosch, Bad Dürkheim, DE;
Stephan Bauer, Ostercappeln, DE;
Jürgen Winkler, Schwarzheide, DE;
Els Paredis, Ranst, BE;
Reinhard Lorenz, Laer, DE;
Inge Rotermund, Ortrand, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for preparing polyether alcohols by catalytic addition of at least two alkylene oxides onto H-functional initiator substances, at least one multimetal cyanide compound is used as catalyst and the addition of the alkylene oxides onto the initiator substance includes incorporation of at least one oxyalkylene block during whose formation at least two alkylene oxides are metered in together and the ratio of the alkylene oxides to one another in the mixture is changed during the joint introduction.