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. 20, 2018
Filed:
Dec. 16, 2014
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Klaus Lorenz, Dormagen, DE;
Marco Antonio Marquez-Benitez, Atizapan de Zaragoza, MX;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/30 (2006.01); C08G 65/10 (2006.01);
U.S. Cl.
CPC ...
C08G 65/30 (2013.01); C08G 65/10 (2013.01);
Abstract
This invention relates to a process for preparing polyols which contain oxyalkylene units. This process comprises neutralizing a crude polyol by addition of an acid, optionally removing water, and removing the salts formed by neutralization. The crude polyol is contacted with the acid for at least 5 minutes.