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:
Jul. 02, 2013
Filed:
Mar. 07, 2005
Susanne Bellmann, Ratingen, DE;
Norbert Steiner, Alzenau, DE;
Michael Busch, Moenchengladbach, DE;
Dev Steuck, Haselau, DE;
Johann Schulte, Krefeld, DE;
Wolfgang Woebel, Willich, DE;
Susanne Bellmann, Ratingen, DE;
Norbert Steiner, Alzenau, DE;
Michael Busch, Moenchengladbach, DE;
Dev Steuck, Haselau, DE;
Johann Schulte, Krefeld, DE;
Wolfgang Woebel, Willich, DE;
Ashland Licensing and Intellectual Property LLC, Dublin, OH (US);
Abstract
The invention relates to a method for producing anionic water-in-water polymer dispersions containing at least one finely dispersed, water-soluble and/or water-swellable polymer A and a continuous aqueous phase. This phase has a partial quantity of at least one polymeric dispersing agent B in which monomers dispersed in this aqueous phase are subjected to a radical polymerization, and after the polymerization is completed, the reaction mixture is subsequently diluted with the remaining amount of dispersing agent B. The invention also relates to the polymer dispersions obtained according to the method and to their use, particularly in the paper industry.