Bayer Aktiengesellschaft

Ernst Meisert

Alfred Eitel

Wilhelm Goyert

Hans Wagner

Georg Niederdellmann

Bernd Quiring

Wolfgang Grimm

Gerhard Grogler

Martin Ullrich

Peter Fischer

Werner Mormann

Klaus Recker

Klaus Brecht

Wolfgang Krohn

Franz-Josef Bohne

Gerd Reinecke

Hans Hespe

Gerhard Henes

Cornelius Muhlhausen

The instant invention is directed to a continuous process for the production of thermoplastic materials, comprising:

Process for the production of thermoplastic synthetic materials

The instant invention is directed to a process for the production of a cellular polyurethane elastomer having a density of 0.45 to 0.8 g/cm.sup.3, comprising:

Process for the production of cellular polyurethane elastomers

The instant invention is directed to a process for the modification of a thermoplastic polymer comprising:

Process for the production of thermoplastic polymer by introducing

The present invention relates to an improved continuous process for the preparation of polyurethane elastomers which are distinguished from the products produced by known processes by increased elasticity, reduced shrinkage, higher rigidity (limit bending stress), improved cold notched bar impact resistance and good thermal stability.

Process for the preparation of polyurethane elastomers in which at least

Carbodiimides are prepared by reacting organic isocyanates at a temperature of at least 150.degree. C. in the presence of a catalyst having the formula ##STR1## wherein R and R' are the same or different and represent hydrogen, alkyl, aryl and when joined together form a heterocyclic ring;

Process for the production of carbodiimides and carbodiimide-isocyanate

The instant invention relates to a process for coating the back of textile floor coverings, e.g. carpets, with polyurethane foams wherein it is possible to obtain particularly firm fixing of the nap and improved anchorage of the textile filaments. The process broadly comprises:

Coating the back of a textile floor covering with a polyurethane foam

The instant invention is directed to the discovery that it is now possible to obtain high quality, elastomeric polyurethanes or polyureas, even when using highly reactive diamines as chain lengthening agents, without the formation of unwanted irregularities, if the mixture of reactants is exposed to a high velocity gradient by means of vigorously mixing kneading elements at an early phase of the reaction while the viscosity of the reaction mixture is still low. Generally, the viscosity is kept between 100 and 1000 poises and preferably between 200 and 700 poises during the action of the high velocity gradient.

Process for the production of polyurethane elastomers

Polyurethane elastomers suitable for coating textiles, leather, paper and similar substrate and a multi-stage process for their production. The polyurethane elastomers are obtained from

Growing community of inventors

Leverkusen, Germany

Ernst Meisert