Basf Aktiengesellschaft

Martin R&uuml;benacker

Manfred Niessner

Hubert Meixner

Claudia Nilz

Rainer Dyllick-Brenzinger

Primoz Lorencak

J&uuml;rgen Decker

Heinrich Hartmann

Walter Denzinger

Volker Schehlmann

Friedrich Linhart

Hartwig Voss

Roland Ettl

Stefan Frenzel

Kristin Tiefensee

Andreas Stange

Axel Kistenmacher

Norbert Mahr

Ulrich Steuerle

Peter H&ouml;ssel

Klaus Lorenz

Reinhard Schneider

Anton Negele

Jens Utecht

Peter Baumann

J&uuml;rgen Bernbach

Ellen Kr&uuml;ger

J&uuml;rgen Nieberle

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.

Method for fractionation of water soluble or dispersible polymers containing amino groups with a broad molar mass distribution

Paper, board and cardboard having high dry strength are produced by the addition of cationic, anionic and/or amphoteric starch as dry strength agents to the paper stock and drainage of the paper stock with sheet formation in the presence of cationic polymers as retention aids for starch, and cationic polymeric retention aids are used for increasing the retention of dry strength agents comprising cationic, anionic and/or amphoteric starch in the production of paper, board and cardboard.

Method for producing high dry-strength paper, pulpboard and cardboard

Agglomerated polymer particles of finely divided, water-soluble or water-swellable polymers containing ammonium carboxylate groups are prepared by azeotropic removal of water from water-in-oil emulsions of the water-soluble or water-swellable polymers which contain ammonium carboxylate groups in the presence of from 0.1 to 40% by weight, based on the polymers, of polyalkylene glycols which have an agglomerating effect and which are obtainable by an addition reaction of C -C -alkylene oxides with alcohols, phenols, amines or carboxylic acids and contain at least two polymerized alkylene oxide units and additionally of from 0.1 to 20% by weight, based on the polymers, of protective colloids which are obtainable by free radical copolymerization of C -C -monoolefins with monoethylenically unsaturated C -C -dicarboxylic anhydrides by a mass polymerization method at from 80 to 300&deg; C. to give copolymers having molecular weights of from 500 to 20,000 g/mol, and said agglomerated polymer particles are used as thickeners for textile pigment print pastes.

Agglomerated particles of finely divided polymers which are water-soluble or capable of swelling in water and contain ammonium carboxylate groups

The invention relates to a method for producing water-soluble homopolymers and copolymers, comprising oligoalkylene-imine side chains of the general formula (I), wherein &lsqb;AI&rsqb; , m, Y and x have the definitions given in claim , by radical homopolymerisation or copolymerisation of monomers A of the general formula (II), wherein &lsqb;AI&rsqb; , m, n, Y and R have the definitions given in claim , in an aqueous reaction medium. The invention also relates to the homopolymers and copolymers obtained by this method and to their use as auxiliary agents in paper production.

Method for producing water-soluble polymers, comprising oligoalkylene-imine side chains

A process for the elimination of formamide from polymers containing N-vinylformamide units involves treating formamide-containing polymers with from 1 to 2 mol-equivalents of an acid or a base, based on 1 mol-equivalent of formamide, under reaction conditions such that the N-vinylformamide units in the polymer undergo virtually no hydrolysis.

Method for eliminating formamide from polymerizates containing n-vinyl formamide units

Water-soluble polymers whose characteristic structural elements comprise units of the formulae I and/or II

Water-soluble polymers and their use in cosmetic formulations

Amphiphilic graft copolymers are prepared by grafting a pre-formed graft base polymer comprising at least 5% by weight of units of formula (I)

Amphiphilic graft polymers based on graft bases containing n&mdash;vinylcarboxylic acid units, process for their preparation and their use

Polymer-modified anionic starch, method for its production, and its use

Using without emulsions as thickeners in cosmetic and pharmaceutical formulations

Wastewaters and circulation waters in papermaking, in deinking and in pulp bleaching are treated by adsorption of water-soluble anionic compounds and compounds dispersed in water from the wastewaters and circulation waters over finely divided adsorbents which consist of insoluble, only slightly swellable polymers which contain polymerized vinylamine units, and these polymers are used as adsorbents for treating water circulations in papermaking and for treating paper machine wastewaters and wastewaters from the deinking process and from pulp bleaching.

Process for cleaning wastewater and recirculating water in paper production, de-inking and bleaching of pulp

Growing community of inventors

Altrip, Germany

Martin Rübenacker

Growing community of inventors

Altrip, Germany

Martin R&uuml;benacker

Martin Rübenacker