Basf Se Corporation

Rüdiger Häffner

Achim Stammer

Angela Ulzhöfer

Rolf-Egbert Grützner

Faissal-Ali El-Toufaili

Ralf Schulz

Jürgen Demeter

Jürgen Deininger

Jens Becker

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

The invention relates to a process for working up particulate crude polyoxymethylene, which comprises the following steps:

Process for working up particulate crude polyoxymethylene

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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Neustadt, Germany

Rüdiger Häffner