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:
Sep. 20, 2022
Filed:
Aug. 01, 2018
Applicant:
Roehm Gmbh, Darmstadt, DE;
Inventors:
Steffen Krill, Muehltal, DE;
Johannes Vorholz, Alzenau, DE;
Andreas Weber, Frankfurt, DE;
Marita Kaufmann, Griesheim, DE;
Andrea Wittkowski, Gross-Umstadt, DE;
Assignee:
Roehm GmbH, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08F 220/06 (2006.01); C07C 45/35 (2006.01); C07C 47/22 (2006.01); C07C 51/235 (2006.01); C04B 24/24 (2006.01); C08F 2/38 (2006.01); C07C 45/00 (2006.01); C04B 24/26 (2006.01);
U.S. Cl.
CPC ...
C08F 2/38 (2013.01); C08F 220/06 (2013.01); C04B 24/2641 (2013.01); C07C 45/002 (2013.01); C07C 45/35 (2013.01); C07C 47/22 (2013.01); C07C 51/235 (2013.01); C08F 2438/02 (2013.01);
Abstract
The present invention relates to a process for preparing a poly(meth)acrylic acid, characterized in that a (meth)acrylic acid-containing process stream from (meth)acrolein synthesis is subjected to free-radical polymerization. The invention also relates to the esterification of the polymer obtained to give a homopolymer or copolymer ester, and to the use thereof as additive, flow improver and water reducer.