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:
Jul. 25, 2017
Filed:
Nov. 19, 2014
Covestro Deutschland Ag, Leverkusen, DE;
Jörg Hofmann, Krefeld, DE;
Kai Laemmerhold, Shanghai, CN;
Hartmut Nefzger, Pulheim, DE;
Monika Heinz, Köln, DE;
Bert Klesczewski, Köln, DE;
Klaus Lorenz, Dormagen, DE;
Covestro Deutschland AG, Leverkusen, DE;
Abstract
The present invention relates to a process for preparing polyether polyols by addition of alkylene oxides onto H-functional starter substances, characterized in that at least one urethane alcohol of formula (II) where Ris linear or branched Cto C-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, Ris linear or branched Cto C-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R is H, linear or branched Cto C-alkyl, Cto C-cycloalkyl, Cto C-aryl, Cto C-aralkyl, Cto C-alkenyl, Cto C-alkynyl, each of which may optionally be interrupted by heteroatoms such as O, S or N and/or each of which may be substituted by alkyl, aryl and/or hydroxyl, is used as H-functional starter compound. The invention further provides the polyether polyols containing a urethane group, the polyether polyols obtainable by the process according to the invention, for the use of the inventive polyether polyols for preparation of a polyurethane polymer, and the resulting polyurethane polymers.