Bayer Aktiengesellschaft

Faserwerke Huls Gesellschaft MIT Beschrankter Haftung

Helmut Ohse

Hans Westermann

Karl-Heinz Magosch

Armin Kohler

Herbert Pelousek

Rolf-Volker Meyer

Edgar Muschelknautz

Bernd Klinksiek

Wolfram Wagner

Roland Vogelsgesang

Wolfgang D Muller

Eckhard Moller

Klaus Rall

Hans-Joachim Wollweber

Beatrix Frauendorf

Bernt Kesper

Wilhelm Schiemann

Wolfgang 35e,uml/a/ Cker

Klaus Hachmann

Jurgen Walther

Walter Hofmann

The invention relates to a process for the production of low-gel spinning solutions-surprisingly stable in their solution viscosity-of segmented polyurethane urea elastomers in highly polar solvents, such as dimethyl formamide or dimethyl acetamide, characterized by the use of multistage jet reactor, and to a multistage jet reactor.

Process for the production of viscosity-stable, low-gel highly

In the production of polyesters by introduction of precondensates on to a first plate of a column reactor product quality is improved and operating time is increased in that spontaneous flash evaporation of the precondensate takes place in a so-called entry box, before the introduction on to the first plate of the column reactor, and in that separation of the liquid component from the gaseous component is subsequently carried out by centrifugal force in a so-called annular chamber.

Process for the production of polyesters

The invention relates to a process for the production of a high molecular weight polyester, which comprises reacting a dicarboxylic acid or derivative thereof with a diol in the presence of a combination of compounds of manganese, magnesium, titanium and antimony as a catalyst.

Process for the production of high molecular weight polyesters

This invention relates to a process for the production of a high molecular weight polyester by reacting a dicarboxylic acid or a derivative thereof with a diol in the presence of a catalyst comprising a combination of compounds of manganese, magnesium and titanium.

The invention relates to a process for the production of a false-twist textured, highly elastic, synthetic crimp yarn with low residual shrinkage and latently bound crimp by stretching, false-twisting, heat-fixing and thermal after-treatment of the synthetic yarn at yarn draw-off rates of from 400 to 900 m/min, in which the thread tension during thermal after-treatment is 6-25% of the thread tension during heat-fixing, the time of thermal after-treatment is 2-5% of the time spent in heat-fixing and the temperature of the yarn during the thermal after-treatment is 30.degree.-100.degree. C.

Highly elastic synthetic crimp yarn with low residual latent crimp and

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Dormagen, Germany

Helmut Ohse