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:
Mar. 16, 2004
Filed:
Nov. 13, 2001
Ulrich Steuerle, Heidelberg, DE;
Hartwig Voss, Frankenthal, DE;
Jürgen Bernbach, Ludwigshafen, DE;
Jürgen Decker, Speyer, DE;
Rainer Dyllick-Brenzinger, Weinheim, DE;
Klaus Lorenz, Worms, DE;
Hubert Meixner, Ludwigshafen, DE;
Martin Rübenacker, Altrip, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for fractionating water-soluble or water-dispersible amino-containing synthetic polymers having a broad molar mass distribution by ultrafiltration, wherein the polymer solution or dispersion to be fractionated is fed continuously into an ultrafiltration circulation with at least one ultrafiltration unit, and retentate having a narrower molar mass distribution and permeate are discharged continuously, in such a way that the ultrafiltration circulation is essentially in a steady state, the polymers obtainable by this process and their use.