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:
Dec. 15, 2015
Filed:
Oct. 05, 2011
Till Blum, Kuantan, MY;
Peter Zurowski, Landau, DE;
Tobias Johannes Korn, Ludwigshafen, DE;
Sylke Haremza, Neckargemünd, DE;
Thorsten Friese, Mannheim, DE;
Friedrich-georg Martin, Heidelburg, DE;
Ulrich Jäger, Römerberg, DE;
Steffen Rissel, Kirchheim, DE;
Volker Schliephake, Schifferstadt, DE;
Till Blum, Kuantan, MY;
Peter Zurowski, Landau, DE;
Tobias Johannes Korn, Ludwigshafen, DE;
Sylke Haremza, Neckargemünd, DE;
Thorsten Friese, Mannheim, DE;
Friedrich-Georg Martin, Heidelburg, DE;
Ulrich Jäger, Römerberg, DE;
Steffen Rissel, Kirchheim, DE;
Volker Schliephake, Schifferstadt, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P whose acrylic acid content is at least 10% by weight and which, based on the weight of the acrylic acid present therein, additionally comprises at least 100 ppm by weight of propionic acid and at least 100 ppm by weight of glyoxal, in which at least one chemical compound of the element copper is added to the liquid phase P, and the resulting liquid phases P to which a chemical compound of the element copper has been added.