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:
Jun. 12, 2001
Filed:
Mar. 09, 1998
Applicant:
Inventors:
Bernd Guettes, Sallgast, DE;
Gerd Hoeppner, Schwarzheide, DE;
Monika Wetterling, Senftenberg, DE;
Heinz Auer, Neulussheim, DE;
Jens Bruhn, Ludwigshafen, DE;
Stefan Dinsch, Schipkau, DE;
Juergen Winkler, Schwarzheide, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 4/100 ; C07C 4/300 ;
U.S. Cl.
CPC ...
C07C 4/100 ; C07C 4/300 ;
Abstract
A process for treating polyether polyols prepared in a conventional manner by base-catalyzed reaction of H-functional initiator substances with alkylene oxides comprises a combination of a thermal-reactive step at a pH of less than 7 and a temperature above 60° C. and a thermal-distillative step in a countercurrent column using a purifying agent. The polyether polyols prepared according to the invention are used for producing low-fogging and low-odor PUR foams.