Bayer Aktiengesellschaft

Other

Volker Eckhardt

Hans-Rudolf Dicke

Dieter Freitag

Joachim Genz

Karsten-Josef Idel

Ludwig Bottenbruch

Ralf Pakull

Frank Gerald Kleiner

Dieter Arlt

Karsten J Idel

Uwe Westeppe

Ernst-Ulrich Dorf

Erich Hammerschmidt

Hans R Kricheldorf

Paul J Mayska

Axel Bader

Hans-Rytger Kricheldorf

Hans-Rudolph Dicke

Rolf Dhein

Knud Reuter

Erhard Tresper

Gunther Weymans

Carl Casser

Aziz El Sayed

Wolfgang Russeler

Klaus-Christian Paetz

Kurt Halcour

Aziz E Sayed

Rudolf Wagner

Ulrich Biskup

Frank-Gerald Kleiner

Ulrich Leyrer

Volker Doring

Heinz-Ulrich Blank

Sabine Kern

Jurgen Engelhardt

Dierik Lubbers

Low-melting polymers containing at least one Z-configured stilbene group are produced by reaction of Z-configured bifunctional stilbene compounds with bifunctional monomers, oligomers or relatively high molecular weight components at temperatures in the range from -30.degree. to 250.degree. C., optionally in the presence of organic solvents and/or diluents and/or catalysts, the Z-configuration of the stilbene units remaining intact. The low-melting polymers may be processed by standard methods to moldings of various kinds which may be converted by treatment of temperatures of 250.degree. to 500.degree. C. and/or by irradiation at wavelengths of 200 to 800 nm into high-melting plastics articles of high heat resistance.

Process for the production of low-melting polymers containing at least

The substituted polyheterocycles containing recurring structural units corresponding to the formula ##STR1## in which X is an oxygen atom, a sulfur atom or N-H, show good solubility in mixtures of methanesulfonic acid and methylene chloride or trifluoroacetic acid and methylene chloride. They may be used for the production of mixtures with thermoplastic polymers.

Stiff-chain polyheterocycles having improved solubility, a process for

The new aromatic ethers of the formulae ##STR1## can be used for the preparation of plastics which, in turn, can be processed further to give moulded articles, films, foils and filaments. The plastics prepared from the new aromatic ethers are distinguished by exceptional dimensional stability under heat.

Aromatic ethers

The novel thermotropic polycarbonates having recurring structural units of the formulae ##STR1## have good mechanical properties and good processability. They can be used in conventional manner for manufacturing mouldings, filaments, fibres and films.

Copolycarbonate from mixture of polyarylene diol

New Z-stilbene compounds and a process for their preparation are disclosed wherein the compounds correspond to the following formulae: ##STR1##

Bifunctional stilbene compounds containing at least one Z-configurated

The present invention relates to a process for the production of high molecular weight crystalline aromatic polyether ketones from an aromatic dihydroxy compound and an aromatic dihalogeno compound which contains a keto group, characterized in that N-C1-C5 alkyl caprolactam solvents and a mixture of alkali metal compounds consisting of at least one alkali metal carbonate and at least one compound selected from alkali metal hydroxides, bicarbonates, fluorides, hydrides, alkoxides (e.g. methylates or ethylates) and alkylates (e.g. ethyls or butyls) are used.

Process for the production of aromatic polyether ketones

Thermotropic, fully aromatic polyesters which have been prepared by polycondensation of p-hydroxybenzoic acid, hydroquinone, 4,4-dihydroxydiphenyl, terephthalic acid and isophthalic acid and which contain specific amounts of the radicals of the compounds mentioned are distinguished by an excellent toughness, very high heat distortion temperature and good processability.

Thermotropic, fully aromatic polyesters prepared by polycondensation of

The invention relates to a new process for the production of bifunctional polyphenylene oxides bearing OH groups as functional groups at both ends of the chain.

Process for the production of bifunctional OH-terminated polyphenylene

The invention relates to a process for the production of crystalline, aromatic polyether ketones in lactams as solvent. The polymers produced have a high molecular weight, high thermal stability, high resistance to the effect of chemicals and good mechanical properties.

The new thermotropic polyesters containing recurring structural units corresponding to the following formulae ##STR1## show excellent mechanical properties and good processibility. They may be used in the usual way for the production of moldings, filaments, fibers and films.

Thermotropic polyesters, a process for their production and their use

Thermotropic polyesters containing recurring structural units corresponding to the following formulae ##STR1## can be processed at low temperatures and may be used for the production of moldings, filaments, fibers and films.

Thermotropic, fully aromatic polyesters having a low processing

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.

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

The thermotropic aromatic polyesters according to the invention which contain recurring units corresponding to the following formulae ##STR1## show improved resistance to chemicals, low melting points and, hence, good processibility in addition to the well-known favorable mechanical properties of liquid-crystal materials. The thermotropic aromatic polyesters are used for the production of moldings, filaments, fibers and films.

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Krefeld, Germany

Volker Eckhardt