Basf Se Corporation

Angela Ulzhöfer

Achim Stammer

Marco Krüger

Faissal-Ali El-Toufaili

Robert Heinz

Simon Gramlich

Gerhard Lange

Tobias Kortekamp

Cecile Schneider

Jörg Erbes

Jens Becker

Bernhard Linner

Frank Niedermaier

Markus Steffen

Rüdiger Häffner

Rolf-Egbert Grützner

Alexandra Wiedemann

Stefan MÜSSIG

Michael Klemens MÜLLER

A method for desalinating a salt-containing polymer (SP) comprising a polyaryl ether having a softening temperature Tand a salt (S), comprising the steps of

Desalination of polyaryl ethers by means of melt extraction

The invention relates to a method for synthesizing a polyamide, in which method an aqueous solution is sprayed onto the polyamide before and/or during a solid-state post-condensation process. The aqueous solution comprises at least a first compound, selected from the group comprising phosphoric acid, fully neutralized salts of phosphoric acid, partially neutralized salts of phosphoric acid, and mixtures thereof, and a second compound, selected from the group comprising an acid, an anhydride, a lactone, ammonia, an amine, and mixtures thereof, with the stipulation that the second compound is not phosphoric acid and is not phosphoric acid anhydride. The spraying occurs at a temperature that lies below the boiling point of water. A polyamide that can be produced by means of the method according to the invention can be used in particular to produce films, monofilaments, fibers, threads, or textile sheet materials.

Method for producing highly viscous polyamides

In a process for producing polyamides by polycondensation of polycondensable polyamide-forming monomers and/or oligomers in reaction mixtures comprising same, which may be water-containing but are free from organic solvents, the polycondensation is effected in an agitated reactor under agitation in a first step in the liquid phase and after a phase change taking place during the process in the same reactor is effected in a subsequent second step in the solid state, wherein the temperature in the reactor is below the melting point of the polyamide in the second step at least.

Production of polyamides by polycondensation

The process for producing aromatic polyether sulfones via reaction of a dichlorodiphenyl sulfone component with a bisphenol component as monomers in the presence of alkali metal carbonate in the melt in the absence of solvents and diluents comprises carrying out the reaction in a mixing kneader which is operated with a shear rate in the range from 5 to 500 s.

Process for producing aromatic polyether sulfones

A process for producing polyamides from the corresponding monomers and/or prepolymers comprises the steps of

Simplified production of nylon-6

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Ludwigshafen, Germany

Angela Ulzhöfer