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. 19, 2019
Filed:
Apr. 10, 2015
Applicant:
Basf SE, Ludwigshafen, DE;
Inventor:
Björn Langlotz, Trostberg, DE;
Assignee:
BASF SE, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 220/56 (2006.01); C08F 2/10 (2006.01); C08F 2/56 (2006.01); C08F 4/04 (2006.01); C08F 4/40 (2006.01);
U.S. Cl.
CPC ...
C08F 220/56 (2013.01); C08F 2/10 (2013.01); C08F 4/04 (2013.01); C08F 4/40 (2013.01);
Abstract
A process for preparing water-soluble homo- or copolymers comprising (meth)acrylamide by free-radical polymerization of an aqueous solution of monoethylenically unsaturated monomers comprising at least (meth)acrylamide in the presence of at least one stabilizer for prevention of polymer degradation by molecular oxygen. The stabilizer is preferably one selected from the group of sulfur compounds, sterically hindered amines, N-oxides, nitroso compounds, aromatic hydroxyl compounds and ketones, more preferably 2-mercaptobenzothiazole or a salt thereof.