Bayer Aktiengesellschaft

Aziz El-Sayed

Manfred Schmidt

Hans-Rudolf Dicke

Martin Wandel

Dieter Freitag

Karl-Heinz Ott

Rolf-Volker Meyer

Wilfried Haese

Friedemann Muller

Wilfried Zecher

Hans-Detlef Heinz

Karl Fuhr

Peter-Rolf Muller

Rolf Dhein

Ludwig Bottenbruch

Burkhard Kohler

Alfred Pischtschan

Hans J Rosenkranz

Ralf Dujardin

Harald Pielartzik

Herbert Bartl

Edgar Ostlinning

Harald Oertel

Peter-Roger Nyssen

Werner Kloker

Ralf Lange

Burkhard Lachmann

Herbert Magerstedt

Andreas Gittinger

Ulrich Biskup

Joachim Priemer

Raoul Resz

Frank Gerling

Karl Nothen

Mark Witman

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

A thermoplastic molding composition, containing

Laser-inscribable polymer moulding compositions

A polymeric molding compositon based on aliphatic polyamides contains as additives polyarylene sulfides and polyphenolic compounds free from tertiary alkyl group ortho to the phenolic-OH groups is useful in producing molded articles such as films, fibers and shaped objects.

Polyamide molding compounds

The subject of the invention is flameproofed, non-dripping polyamide moulding compounds which contain specific amounts of the following:

Flameproofed, non-dripping polyamide moulding compound

The invention relates to new, free-flowing polyamide molding compounds and blends, characterized in that they are prepared by mixing of polyamides known per se in the melt with low molecular weight, liquid-crystalline esters and/or ester amides corresponding to formula (I) and/or liquid-crystalline, oligomeric esters and/or ester amides corresponding to formula (II) and, optionally, other additives, at least one polymeric blending component being used as a further additive in the case of polyamide blends, and to the use of these liquid-crystalline (LC) additives I and/or II as flow promoters in polyamide molding compounds and blends and to a process for the production of the new polyamide molding compounds and blends. The invention also relates to the new oligomeric esters and/or ester amides corresponding to formula (II).

Free-flowing polyamide molding compounds and blends

The invention relates to a process for the production of polyamide imides from diimidodicarboxylic acids, trimellitic imidocarboxylic acids and diisocyanates and to their use as moldings, films and binders for paints.

Production of polyamide imides

The invention relates to flameproofed, non-dripping polyamide moulding compositions which contain certain amounts of

Flameproofed, non-dripping polyamide moulding compositions

The invention relates to aliphatic-aromatic polyamide-imides and their use for the production of shaped articles.

Aliphatic-aromatic polyamide-imides

Thermotropic wholly aromatic polyesters containing condensed residues of p-hydroxybenzoic acid, isophthalic and optionally terephthalic acid, hydroquinone and 3.4'- and/or 4.4'-dihydroxy diphenyl, -diphenyl ether and/or -diphenyl sulphide, have excellent mechanical properties and are nevertheless not difficult to process.

Thermotropic aromatic polyesters having high rigidity and toughness,

Thermotropic fully-aromatic polyesters which contain sulphonic acid and/or metal sulphonate groups bound to the aromatic rings of the polyester, have improved mechanical properties.

Thermotropic, aromatic polyesters having good mechanical strength,

Thermotropic fully aromatic polyesters which contain radicals of p-hydroxybenzoic acid, iso- and/or terephthalic acid and 2,7-dihydroxynaphthalene condensed therein, having outstanding mechanical properties and accordingly are very easy to process.

Thermotropic aromatic polyesters having a high tenacity and an improved

Piperidine derivatives of formula ##STR1## can be prepared by reacting 4-amino-piperidine with for example enolic ethers. The compounds obtained may be used as stabilizers.

Piperidine derivatives as light stabilizers

A process for the production of partially or completely hydrolyzed ethylene/vinyl acetate copolymer which is suitable for the various powder coating techniques, wherein the polymer solution is extruded in a non-gelled state into water with a temperature no more than 20.degree. C below the gellation temperature and the gelling solution is converted into particles from 0.02 to 5 mm in diameter by means of high shear forces.

Growing community of inventors

Leverkusen, Germany

Aziz El-Sayed