Basf Aktiengesellschaft

Basf Se Corporation

Basf Aktiengesellscaft

Heinrich Sack

Joachim Pakusch

Maximilian Angel

Joachim Roser

Bernd Reck

Joachim Clauss

Axel Wilms

Andree Dragon

Gad Kory

Ines Pietsch

Florian Richter

Stefan Schwiegk

Christian Schmidt

Silke Biedasek

Ning Zhu

Markus Koppers

Axel Sanner

Eckehardt Wistuba

Hubert Trauth

Sylke Haremza

Arnold Schneller

Achim Stammer

Matthias Gerst

Gunther Berndl

Wilhelm Friedrich Beckerle

Dirk Simon

Juergen Schmidt-Thuemmes

Wolfgang Gaschler

Matthias Laubender

Jörg Breitenbach

Volker Seidl

Peter Fickeisen

Volker Rauschenberger

Folker Ruchatz

Hans-Juergen Denu

Stefan Dreher

Gerald Wildburg

Michael Seufert

Johannes T&uuml;rk

Oliver Reese

Manfred Appel

Hans-Ulrich Moritz

Hans-J&uuml;rgen Denu

Isa Alexandra Queiroz Da Fonseca

Rolf Gulden

Mario Sandor

Oliver Labisch

Helmut Teichmann

Paola Uribe Arocha

J&uuml;rgen Krockenberger

Renate Wustefeld

Rüdiger Füssl

Rainer Ostermann

Hans-Jürgen Denu

Dieter Reimer

Werner Pauer

Richard Kramer

Jeffrey Knight

Mohammed Abboud

Corinna Naundorf

Alexander GÖTZ

The invention relates to a process for continuously preparing polyamide oligomers. This comprises continuous conveying of an aqueous solution of polyamide-forming monomers from a reservoir vessel into an oligomerization reactor, heating of the aqueous solution beyond a dissolution or storage temperature, the residence time of the monomer solution in the oligomerization reactor being limited and the pressure or the partial vapor pressure of the water being adjusted such that a conversion of monomers to polyamide oligomers does not exceed a maximum value and/or the polyamide oligomers formed do not phase-separate or spontaneously crystallize in solid form, and continuous discharge of the polyamide oligomers from the oligomerization reactor. A polyamide oligomer preparable by this process can be provided continuously in a mixture with water in a process for preparing a semicrystalline or amorphous, thermoplastically processible polyamide and then postcondensed to give a polyamide. This polyamide can be used for production of moldings by means of injection molding, multicomponent injection molding, injection molding/welding, extrusion, coextrusion, blow molding or thermoforming.

Method for continuously producing polyamide oligomers and producing semicrystalline or amorphous polyamides that can be thermoplastically processed

The present invention relates to a process for preparing an aliphatic or semiaromatic polyamide oligomer, in which an aqueous composition of the monomers is subjected to an oligomerization at elevated temperature and elevated pressure and the oligomerization output is preferably subjected to an expansion.

Method for the continuous production of an aliphatic or semi-aromatic polyamide oligomer

The invention relates to excipients in powder form for use in solid pharmaceutical presentations, comprising a pharmaceutically acceptable polymer and a liquid or semisolid solubilizing surface-active substance.

Solubilizing aids in powder form for solid pharmaceutical presentation forms

A process for the preparation of a readily water-redispersible polymer powder by spray drying of an aqueous polymer dispersion in the presence of a novel spray drying assistant.

Method for producing polymer powders that can be easily redispersed in water

A process for preparing a polymer powder by evaporating the volatile constituents from an aqueous dispersion of a film-forming polymer P, wherein prior to the evaporation of the volatile constituents the aqueous polymer dispersion still comprises drying assistants T, present in an amount of from 0.1 to 80% by weight, based on the polymer P of the dispersion, and there being used as drying assistant T polyvinylformamide. The polyvinylformamide used preferably has a K value (KW), determined by the method of Fikentscher in accordance with DIN 53726, of from 5 to 50.

Preparation of polymer powders

A readily water-redispersible and water-wettable polymer powder is prepared by spray-drying of an aqueous dispersion of polymer particles with admixing of a hydrophilic and of a hydrophobic antiblocking agent.

Preparation of readily water-redispersible and water-wettable polymer powders

Use of naphthalenesulfonic acid-formaldehyde condensates products as drying aids

The invention relates to a thermally hardenable polymer dispersion powder and the use of said powder as a binding agent in particular for fibrous and grainy materials. The binding agent in powder form is obtained by drying a polymer dispersion which comprises a carboxyl-group-containing polymerization component in addition to, optionally, a hydroxy-alkylated amine.

Thermally hardenable polymer binding agent in the form of a powder

The present invention provides a process for preparing polymer powders by evaporating the volatile constituents from aqueous dispersions of film-forming polymers P in the presence of drying assistants T selected from the salts of oligomeric arylsulfonic acid-formaldehyde condensates wherein prior to the evaporation of the volatile constituents the aqueous polymer dispersion comprises at least 1.5% by weight, preferably at least 1.7% by weight, based on the polymer in the dispersion, of at least one anionic surface-active compound AO having at least one C -C alkyl group; the polymer powders obtainable by the process; and their use in binding mineral building materials.

A polymer is obtained by removing the medium from a polymer dispersion or polymer solution containing at least one polymeric phase and at least one stabilizer suitable to protect against the damaging effect of light, heat and/or oxidation.

Stabilized polymer dispersions or polymer solutions, and prepared polymers obtainable therefrom

The invention relates to a pulverulent polymer composition comprising

Polymer compositions in powder form

Pulverulent adhesives comprise a redispersible polymer powder based on a polymer which can be obtained in the presence of a protective colloid, and additionally comprise a filler, an alkaline additive and, if desired, an emulsifier and other additives.

Pulverulent adhesive

Use of phenolsulfonic acid-formaldehyde condensation products as drying

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Hassloch, Germany

Heinrich Sack