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. 29, 2020
Filed:
Feb. 02, 2017
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Johannes Barth, Shanghai, CN;
Gledison Fonseca, Ludwigshafen, DE;
Dieter Faul, Ludwigshafen, DE;
Martin Ernst, Ludwigshafen, DE;
Juergen Detering, Ludwigshafen, DE;
Ferdinand Leifeld, Ludwigshafen, DE;
Gazi Tuerkoglu, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 120/06 (2006.01); C11D 3/00 (2006.01); C11D 3/37 (2006.01);
U.S. Cl.
CPC ...
C08F 120/06 (2013.01); C11D 3/0036 (2013.01); C11D 3/3757 (2013.01);
Abstract
A process for producing aqueous solutions of acrylic acid polymers by polymerization of acrylic acid in feed operation with a free-radical starter in the presence of hypophosphite in water as solvent, which comprises