Bayer Aktiengesellschaft

Wilhelm Goyert

Hans Wagner

Bernd Quiring

Georg Niederdellmann

Wolfgang Grimm

Ernst Meisert

Alfred Eitel

James M Barnes

Peter Haas

Jurgen Winkler

Albert Awater

Karl-Heinz Ott

Walter Meckel

Hermann Perrey

Hans-Georg Hoppe

Wolfgang Henning

Holger Meyborg

Herbert Heidingsfeld

Joachim Franke

Wolfgang Wenzel

Herbert Salzburg

Wolfgang Oberkirch

Eduard Mayer

Hans Hespe

Bruno Kruger

Helmut Kipphardt

Wolfgang Fleige

The invention relates to a process for stabilizing ester-containing plastics against degradation by heat and/or hydrolysis by the incorporation of sterically hindered isocyanate-terminated carbodiimides. The incorporable carbodiimides produce an excellent anti-aging effect and do not give rise to volatile products, even at very high temperatures.

Process for stabilizing plastics containing ester groups

The present invention is directed to polyethers obtained by the reaction of a substituted 1,2-epoxy-alkane bearing at least one alkyl substituent containing at least 8 carbon atoms with at least one polyol corresponding to the formula

Polyethers and their use as mold release agents for plastics

The invention is directed to a process for the production of polyurethanes suitable for thermoplastic processing comprising mixing

Process for the production of radiation-crosslinked thermoplastic

The present invention is directed to a process for the production of matte, non-blocking, thin-walled molded articles, films or tubes from polyurethane elastomers prepared from high molecular weight polyols which contain dispersed polyadducts based on polyisocyanate polyaddition products. The use of these high molecular weight polyols contained dispersed polyadducts allows for the preparation of thin-walled, molded articles which have reduced surface tackiness. The present invention is additionally directed to the molded articles produced by this process and to their use for forming polyurethane foam composites.

Process for the production of matte, non-blocking, thin-walled molded

The present invention relates to 2,3,2',3'-bis-morpholine derivatives corresponding to the formula ##STR1## The present invention also relates to a process for the preparation of these derivatives and to their use as hydrolysis protective agents for synthetic polymers containing ester groups and/or carbonate groups. Preferred synthetic polymers are polyurethanes.

Bismorpholines, a process for their preparation and their use for

Bismorpholines and a process for their preparation

This invention relates to novel, thermoplastically processible, branched polyurethanes based on naphthylene-1,5-diisocyanate which have good heat stability and are obtained by the claimed process. In the first stage of the process long-chain polyols are reacted with a first diisocyanate which is any diisocyanate other than naphthylene-1,5-diisocyanate in substoichiometric NCO quantities to produce an OH prepolymer which is then lengthened with excess napthylene-1,5-diisocyanate and with a chain lengthening mixture of short-chain diols and triols and/or polyols in specific ratios. The resulting semi-rigid, thermoplastic polyurethane elastomers are characterized by their good dimensional stability under heat, a good rebound elasticity (even at relatively high temperatures), acceptable low temperature flexibility and an outstanding resistance to wear which properties render them useful for the production of hydraulic seals, seals, rollers, buffers, tubes, bellows, plugs, cylinders, couplings and similar moldings.

Thermoplastic polyurethanes having a high heat stability, based on

The instant invention is directed to thermoplastic chemical material comprising:

Reinforced polyurethane thermoplastic chemical materials and processes

Polyurethane elastomers are made by reacting organic polyisocyanates with compounds having at least two groups containing isocyanate-reactive hydrogen atoms and a molecular weight of from 400 to 10,000 and a 1,4-monoanhydro-tetritol in accordance with techniques known to those in the art. Known chain-lengthening agents, auxiliaries and additives may be included in the reaction mixture. The reaction mixtures employed in the process of the present invention have a longer pot life than prior art reaction mixtures. The elastomers produced by this process are shrink stable.

Process for the preparation of polyurethane elastomers using diols of

The present invention relates to low-halogen-content, thermoplastically-processible polyurethane elastomers (TPU), to which are added antimony trioxide, chlorinated and/or brominated aromatic compounds having a specified halogen content, aluminum hydroxide having a specified particle size, phosphoric acid tris-ester, and, optionally, quaternary tetra-alkyl ammonium salts. These additives impart an unexpectedly favorable combination of electrical surface properties, flameproof behavior and abrasion resistance.

Low-halogen-content, thermoplastic polyurethane elastomer having

The invention is directed to a process extruding or melt roll calendering thermoplastic polyurethanes wherein the polyurethanes used are synthesized from p1 (a) one or more relatively high molecular weight substantially linear polyols having molecular weights in the range from 400 to 10,000

Thermoplastic polyurethanes for processing in extruders and/or on

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 thermoplastic synthetic material, comprising:

Thermoplastic synthetic material and a process for its production

The present invention relates to a process for the preparation of polyurethane ureas from relatively high molecular weight polyols, diisocyanates, water as chain lengthening agent and optionally short chain glycols in a multishaft extruder equipped with kneading elements.

Extrusion process for the preparation of polyurethane ureas

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

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Cologne, Germany

Wilhelm Goyert