Bayer Aktiengesellschaft

Edgar Ostlinning

Karsten J Idel

Dieter Freitag

Karsten-Josef Idel

Aziz El Sayed

Ludwig Bottenbruch

Werner Nielinger

Rolf-Volker Meyer

Hans-Joachim Traenckner

Harald Pielartzik

Wolfgang Alewelt

Walter Heitz

Wolfgang Koch

Ralf Lange

Helmut Schulte

Klaus Sommer

Andreas Gittinger

Georg Heger

Hans-Josef Buysch

Rolf Dhein

Wolfgang Ebert

Klaus Reinking

Bernhard Schulte

Ernst-Ulrich Dorf

Aziz El-Sayed

Raymond Audenaert

Otto Neuner

Hubert Goldbach

Wolfgang M Eisermann

Aziz E Sayed

Herbert Magerstedt

Karl-Herbert Fritsch

Frank Gerling

Hans G Frohlen

Alban Hennen

Salvatore Messina

Dieter L Ohr

The invention relates to thermally stable, weather-resistant polyamide moulding compositions containing as stabiliser, a mixture of a copper halide, one or more halogen compounds and hypophosphorous acid or an alkali metal or alkaline earth metal salt of this acid, wherein the individual components of the stabiliser mixture are added in an amount such that the molar amount of halogen contained in the moulding composition is greater than or equal to six times the molar amount of and less than or equal to fifteen times the molar amount of copper contained in the moulding composition and the molar amount of phosphorus is greater than or equal to the molar amount of and less than or equal to ten times the molar amount of copper contained in the moulding composition.

Thermally stable, weather-resistant polyamide moulding compositions

The invention relates to thermally stable and UV-stable polyamide molding compounds containing colloidal copper formed in situ and to a process for their production.

Thermally stable copper-containing polyamide molding compounds

The invention relates to transparent multi-layer films made from polyamides and polyolefines using copolyamides of .epsilon.-caprolactam together with diamines and dicarboxylic acids.

Multi-layer films made from copolyamides

The invention relates to polyamide molding compounds with increased viscosity, high thermal stability and favorable mechanical properties, to a process for their production and to their use.

Polyamide compounds containing diepoxide and having high viscosity

The invention relates to a process for the production of high molecular weight polyamide 6 (polycaprolactam).

Process for the production of high molecular weight polyamide 6

The present invention relates to colored polymer moulding materials which give rise to colored markings on a dark background with a very high contrast ratio on the absorption of laser energy.

Polymer moulding materials for producing a partial color change by laser

The invention relates to readily processible polyamide molding compounds which have very good mechanical and electrical properties as well as high surface quality and are based on polyamide, magnesium hydroxide and polyhydroxy compounds of the Novolak type.

Highly flame-retardant polyamide moulding compounds

The present invention relates to easily processable polyamide moulding materials with very good mechanical and electrical properties based on calcium magnesium carbonate hydrate as the flame-retardant additive.

Difficultly flammable polyamide moulding materials

This invention relates to readily processable polyamide molding compounds combining very good mechanical and electrical properties with high surface quality based on copolyamides and magnesium hydroxide.

Flame-retardant polyamide molding compounds

The invention relates to flameproofed non-drip polyamide molding compounds which contain certain quantities of

Flameproofed non-drip polyamide molding compounds

The invention relates to a process for the production of caprolactam by thermal depolymerization of polyamide in the presence of small quantities of potassium carbonate at 250.degree. to 320.degree. C. and to a process for purifying the resulting caprolactam.

Production of caprolactam by thermal depolymerization of polyamide 6

The invention relates to an anhydrous process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These can be prepared in a polar organic solvent in the absence of water by reaction of dihalogenoaromatics with sodium sulphides and bisulphide or potassium sulphides and bisulphide in the presence of catalysts in a polar organic solvent.

Process for the preparation of high molecular weight, optionally

The invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulfides from alkali sulfides and aromatic dihalogen compounds, in which the reaction is carried out in a polar solvent, such as an N-alkyl lactam, containing from 0.5 to 100 mole %, based on the moles of aromatic dihalogen compound, of a lactam.

Process for the production of high molecular weight, optionally branched

Thermotropic, fully aromatic polyesters and polyester carbonates are produced by esterification of optionally substituted p-hydroxybenzoic acids and aromatic dicarboxylic acids with diaryl carbonate at temperatures in the range from 100.degree. to 220.degree. C. and subsequent transesterification of the aryl ester obtained with diphenols and, optinally, more diaryl carbonate, accompanied by polycondensation, at temperatures in the range from 250.degree. to 330.degree. C., the esterification, the transesterification and the polycondensation being carried out in the presence of heterocyclic compounds containing 1 to 3 nitrogen atoms.

Process for the production of fully aromatic, thermotropic polyesters

Thermotropic fully aromatic polyester carbonates containing condensed residues of optionally substituted 3-hydroxybenzoic acid have great rigidity, impact strength and elongation at break and yet can be processed under the usual conditions owing to their advantageous fusion viscosity.

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Duesseldorf, Germany

Edgar Ostlinning