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. 09, 2003
Filed:
Oct. 01, 2002
Applicant:
Inventors:
Miroslav Chmelir, Krefeld, DE;
Kurt Dahmen, Moenchengladbach, DE;
Assignee:
Stockhausen GmbH & Co. KG, Krefeld, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/00 ; C08F 4/00 ;
U.S. Cl.
CPC ...
C08F 2/00 ; C08F 4/00 ;
Abstract
The invention relates to a process for producing water-soluble or water-swellable polymer products with low levels of residual monomers using acrylic acid and/or acrylic acid derivatives, which process is characterized by adding a nitrogen compound to the monomer solution to be polymerized and subsequent heating of the polymer product at temperatures of from 120 to 240° C. The polymers produced accordingly are suitable for use as flocculants, dispersants and absorbents.