Bayer Aktiengesellschaft

Agfa-gevaert Ag

Hermann Brinkmeyer

Werner Nielinger

Ludwig Bottenbruch

Rudolf Binsack

Harald Pielartzik

Hermann Perrey

Heinz-Josef Fullmann

Manfred Schmidt

Rolf-Volker Meyer

Hans-Rudolf Dicke

Helmut-Martin Meier

Walter Simm

Burkhard Nippe

Helmut Schulte

Bernd Willenberg

Roland Vogelsgesang

Aziz E Sayed

Heinrich Kober

August Bockmann

Gunter B Weber

Gerhard Hubler

The thermotropic, fully aromatic polycondensates according to the invention, which contain compounds capable of complex formation, are distinguished by improved resistance to hydrolysis and may be used for the production of moulded articles, fibres, filaments, sheet products and films.

Thermotropic, fully aromatic polycondensates, a process for their

Unsaturated polyester resins to which thermotropic polymers have been added may be cured with a smaller quantity of copolymerizable monomer for a given viscosity of the unsaturated polyester and are useful for the production of moulded parts and grouting and filling compositions which have wide applications in the building industry, the electrical industry, boat building, medical technology and the motor vehicle industry.

Unsaturated polyester resins containing thermotropic polymers, a process

This invention relates to a process for the production of shrinkable sheet products from copolyamides with good processing properties. The copolyamides consist of .epsilon.-caprolactam and equimolar quantities of dimeric fatty acids and diamines.

Process for the production of polyamide sheet products

Process for the preparation of polyamides from 1,4-diaminobutane and adipic acid, wherein a 40 to 70% strength aqueous solution of the monomers is heated at 280.degree.-320.degree. C., preferably 290.degree.-310.degree. C., for a period of 5 to 30 minutes under a pressure of less than 8 bar, to give a precondensate having a relative viscosity of 1.05 to 2.0, and solid phase after-condensation at 180.degree.-260.degree. C.

Multistage process for the preparation of poly(tetramethylene-adipamide)

This invention relates to a magnetic recording carrier in which the magnetic layer and/or the backing layer contains, in addition to the usual additives, radiation hardenable dispersing agents based on ethylenically unsaturated phosphoric acid ester mixtures capable of forming bataine type stuctures and consisting of reaction products of (A) an acrylic acid ester and/or oligo acrylate containing 1 OH group per molecule, (B) a tertiary alkylamine containing 1 OH group per molecule and (C) phosphorus pentoxide, the reaction products having acid numbers below 200.

Magnetic recording carrier containing radiation hardenable dispersing

A process for the production of copolyamides from aromatic dicarboxylic acids, adipic acid, and hexamethylene diamine having from 30 to 51.5% by weight of units of the hexamethylene adipic acid amide, the monomers being precondensed at at least 250.degree. C. and under a pressure of at least 35 bars and the polycondensation being conducted in a conventional manner to completion.

Process for the production of copolyamide from aromatic dicarboxylic

The processing by shaping, in particular includes here the moulding, spinning, extrusion, compression and injection moulding of polymers. An electric field thereby influences the flowing polymer melt before and/or during and/or after shaping. The temperature of the melt is maintained at a value between the glass temperature and the isotropic point. Thermotropic liquid-crystalline polymers are used as starting product. Among these are, in principle, all polymers which have mesogenic groups in the main and/or side chain and which can be processed from the liquid-crystalline melt phase. The orientation distribution and thus also the mechanical properties of the end product can be purposefully regulated by the electric field.

Thermoplastic processing of thermotropic liquid-crystalline polymers

Thermotropic, wholly-aromatic polyester carbonates which contain condensed radicals of 4,4'-dihydroxydiphenyl have a reduced viscosity in the melt, without the mechanical properties of the product suffering therefrom.

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Krefeld, Germany

Hermann Brinkmeyer