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:
Mar. 07, 2006
Filed:
Jan. 31, 2000
Jörg Hofmann, Krefeld, DE;
Pieter Ooms, Krefeld, DE;
Pramod Gupta, Bedburg, DE;
Walter Schäfer, Leichlingen, DE;
John Lohrenz, Leverkusen, DE;
Jörg Hofmann, Krefeld, DE;
Pieter Ooms, Krefeld, DE;
Pramod Gupta, Bedburg, DE;
Walter Schäfer, Leichlingen, DE;
John Lohrenz, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The invention provides new double metal cyanide (DMC) catalysts for preparing polyetherpolyols by the polyaddition of alkylene oxides to starter compounds which contain active hydrogen atoms, wherein the catalyst comprises a) double metal cyanide compounds, b) bile acids or their salts, esters or amides and c) organic complex ligands. The catalysts according to the invention show greatly increased activity during preparation of a polyetherpolyol.