Bayer Aktiengesellschaft

Cliff Scherer

Heinrich Morhenn

Friedrich-Karl Bruder

Detlev Joachimi

Klemens Kohlgr&uuml;ber

Andreas Gittinger

Konrad Triebeneck

Dieter G&ouml;bbels

Frank Weyrich

Hans-J&uuml;rgen Dietrich

A process for producing a polyamide or copolyamide freed from volatile constituents by removing the volatile constituents, in particular the monomers and dimers, in at least two stages from the polymer melt by using an, in particular, gaseous entrainer is described. The invention also relates to polyamide compositions made of polyamide 6 or a copolyamide with a reduced volatile constituent content, as well as moulding compositions made of the above-mentioned polyamides, and moulded articles and fibers which are produced from these moulding compositions.

Polyamide composition and method for producing the same

A process for the production of polyamides is disclosed. In a first reaction step, suitable monomers such as caprolactam or an aliphatic aminocarboxylic acid are reacted with polyfunctional amines, which contain at least one secondary amino group, and/or with salts containing such amines and dicarboxylic acids. The reaction product is in a further process step undergoes solid phase post-condensation.

Method of producing branched polyamides

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Schwalmtal, Germany

Cliff Scherer