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:
Apr. 22, 2003
Filed:
Jun. 14, 2000
Applicant:
Inventors:
Miroslav Chmelir, Krefeld, DE;
Kurt Dahmen, Moenchengladbach, DE;
Assignee:
Stockhausen GmbH & Co. KG, Krefeld, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08J 4/00 ; C08J / ;
U.S. Cl.
CPC ...
C08J 4/00 ; C08J / ;
Abstract
The invention relates to a method for producing water-soluble or water-swellable polymerizates with a low residual monomer content from acrylic acid and/or acrylic acid derivatives. The method is characterized by the addition of a nitrogen compound to the monomer solution to be polymerized, an in that the polymerizate is subsequently heated at temperature of 120 to 240° C. The polymerizates produced according to the inventive method are suitable as flocculants, dispersants and absorbers.