Bayer Aktiengesellschaft

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Hans-Rudolf Dicke

Volker Eckhardt

Ludwig Bottenbruch

Dieter Freitag

Joachim Genz

Manfred Schmidt

Aziz El Sayed

Aziz El-Sayed

Frank Gerald Kleiner

Ralf Pakull

Klaus-Christian Paetz

Erich Hammerschmidt

Aziz E Sayed

Ulrich Biskup

Albrecht Marhold

Ulrich R Grigo

Karlfried Wedemeyer

Werner Nouvertne

Walter Heitz

Hermann Kauth

Walter Simm

Hans R Kricheldorf

Roland Vogelsgesang

Hermann Brinkmeyer

Kurt Halcour

Rudolf Wagner

Paul J Mayska

Gunter B Weber

Hans-Rytger Kricheldorf

Rainer Kuhn

Mark Witman

Bernd Willenberg

Uwe Kampschulte

Harry Rohr

Heinz-Ulrich Blank

The invention relates to aromatic polyether sulfones having new structural features, to a process for their production and to their use.

Aromatic polyether sulfones, a process for their production and their use

This invention relates to a new thermally stable polyphenylene oxide (PPO) and to its use as thermoplastic material.

End capped thermally stable polyphenylene oxide (PPO)

Certain fluoromethylphenols, such as 3,5-bis-trifluoromethylphenol, are suitable solvents for LC-polymers. Many LC-polymers which have hitherto been regarded as insoluble in organic solvents can be brought into solution by means of these compounds. The polymers thereby become more easily analyzable and can be processed from solution.

Use of fluoromethylphenols as solvents for LC-polymers, and new

The invention relates to a process for the production of high molecular weight, crystalline, aromatic polyether ketones showing high temperature stability, high resistance to the effect of chemicals and good mechanical properties.

Process for the production of aromatic polyether ketones

Thermotropic polyester imides having recurrent units corresponding to the following formulae: ##STR1## have excellent dimensional stability under heat and are suitable for the production of moulded articles, filaments, fibres and films.

Solid phase post polymerization condensation of thermotropic polyester

Thermotropic polyester imides having recurrent structural units corresponding to the following formulae: ##STR1##

Thermotropic polyester imide from N-(3-hydroxy phenyl) trimellitic acid

Moldings of mixtures of an aromatic polycarbonate and a thermotropic polymer show a reduced tendency towards delamination when they contain a fluorinated polyolefin and an elastomeric graft polymer.

Molding compositions of polycarbonate, thermotropic polymer, graft

By processing fibres and filaments of thermotropic polymers from anisotropic melt, films and mouldings having predeterminable properties are formed.

Process for the production of mouldings and films from thermotropic

Thermotropic, fully aromatic polyesters based on p-hydroxybenzoic acid, 4,4'-dihydroxydiphenyl, terephthalic acid and isophthalic acid have exceptionally high dimensional stability under heat. The thermotropic aromatic polyesters are used for the production of moulded articles, filaments, fibres and films.

Thermotropic aromatic polyester based on p-hydroxy benzoic acid,

Thermotropic polyesterimides based on N-(.omega.-carboxyalkylene)-trimellitic acid imides and diphenols are distinguished by superior mechanical properties while at the same time being easily processible.

Thermotropic polyesterimide from N-carboxyalkylene trimellitimide having

Thermotropic, fully aromatic polyesters based on p-hydroxybenzoic acid, aromatic dicarboxylic acid and diphenol in which the dicarboxylic acid groups consist at least in part of 3,3'-diphenyldicarboxylic acid groups have excellent mechanical properties, in particular excellent elongation at break.

Thermotropic aromatic polymers with high elongation at break, processes

Thermotropic, fully-aromatic polyesters having a high content of 3,4'-benzophenonedicarboxylic acid radicals exhibit a combination, hitherto unknown, of good processability, high deflection temperature under load and very high strength and stiffness.

Thermotropic aromatic polyesters having a high deflection temperature

Thermotropic aromatic polyesters which contain condensed radicals of bis-.alpha., .omega.-(4-hydroxyphenyl)-n-alkanes, have high dimensional stability under heat and at the same time high thermal stability. They can be processed thermoplastically at temperatures below 370.degree. C.

Thermotropic aromatic polyester with high thermal stability

The present invention relates to bis-quinoxalines of the formula I ##STR1## their preparation, their use as branching agents for the preparation of branched, thermoplastic polycarbonates and the branched thermoplastic polycarbonates.

Thermoplastic polycarbonate branched with

Thermotropic, fully aromatic polyesters of p-hydroxybenzoic acid, 3,4'-benzophenone-dicarboxylic acid and certain bisphenols have a previously unknown combination of very high rigidity and high toughness.

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Krefeld, Germany

Hans-Rudolf Dicke