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:
Jan. 21, 2014
Filed:
Apr. 09, 2010
Markus Broecher, Muehlheim an der Ruhr, DE;
Charlotta Kanto Oeqvist, Kempen, DE;
Nathalie Sieverling, Duisburg, DE;
Georg Linneweber, Niederkruechten, DE;
Markus Broecher, Muehlheim an der Ruhr, DE;
Charlotta Kanto Oeqvist, Kempen, DE;
Nathalie Sieverling, Duisburg, DE;
Georg Linneweber, Niederkruechten, DE;
Hercules Incorporated, Wilmington, DE (US);
Abstract
The invention relates to novel, stable bi-molecular cationic inverse emulsion polymers (W/O) with both different molecular weights and cationic activities that are assembled via an 'in situ' emulsion polymerization of a high molecular weight cationic polymer in the presence of a low molecular weight polymer in the aqueous phase. The low molecular cationic polymer is produced in a pre-polymerization in solution. The novel, stable cationic water-in-oil emulsion is easy invertible and useful as flocculant, dewatering aid and retention aid in papermaking.