Bayer Aktiengesellschaft

Gunter B Weber

Christian Lindner

Karl-Heinz Ott

Rudolf Binsack

Claus H Wulff

Leo Morbitzer

Hans-Rudolf Dicke

Josef Merten

Karl-Heinz Kohler

Walter Simm

Ludwig Trabert

Dieter Rempel

Heinrich Haupt

Roland Vogelsgesang

Hermann Brinkmeyer

Rudolph Binsack

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

Polyalkylene terephthalates which contain a fluorinated polyolefin in addition to a polymer having a glass transition temperature of less than -30.degree. C., are very tough, exhibit good stability to thermal shaping and hardness, and have a high modulus of elasticity and improved stress/strain behavior.

Thermoplastic moulding compositions based on polyalkylene terephthalate

Thermoplastic moulding materials, with improved toughness at low temperatures, of polyamide and cross-linked graft rubbers from the diene rubber and acrylate rubber series, obtained by heating blends of the two components below the melting point of the polyamide.

Molding compounds of thermoplastic polyamide and graft rubber

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Krefeld, Germany

Gunter B Weber