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:
Aug. 15, 2006
Filed:
May. 07, 2003
Oliver Struck, Düren, DE;
Christian Przybyla, Duisburg, DE;
Achim Sieger, Düren, DE;
Mathias Hahn, Wilhelmshorst, DE;
Dirk Ruppelt, Potsdam, DE;
Werner Jaeger, Kleinmachnow, DE;
Oliver Struck, Düren, DE;
Christian Przybyla, Duisburg, DE;
Achim Sieger, Düren, DE;
Mathias Hahn, Wilhelmshorst, DE;
Dirk Ruppelt, Potsdam, DE;
Werner Jaeger, Kleinmachnow, DE;
Akzo Nobel N.V., Arnhem, NL;
Abstract
The present invention relates to a process for preparing an aqueous polymer dispersion comprising: preparing a dispersant co-polymer of a monomer mixture (M) by polymerising the monomer mixture (M) in a reaction medium which is substantially free from organic solvents and/or substantially free from monomers which are not soluble in water, the monomer mixture (M) comprises at least one cationic vinyl monomer (m) and at least one monomer (m) which is tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, or a monomer of the general formula (I): wherein Ris hydrogen or methyl, Ris hydrogen or C–Calkyl, Ris hydrogen, C–Calkyl, phenyl, or benzyl, n=1 to 4, and x=1 to 50, and then, polymerising one or more water-soluble monomers (m) in an aqueous solution of a salt in the presence of the obtained dispersant polymer. The invention also relates to an aqueous polymer dispersion, use of the dispersion and a process for the production of paper.