Bayer Aktiengesellschaft

Bayer Materialscience Ag

Parker-hannifin Corporation

Covestro Deutschland Ag

Maschinenfabrik Hennecke Gmbh

Bayer Intellectual Property Gmbh

Joachim Wagner

Wolfgang Fischer

Manfred Schmidt

Werner Rasshofer

Heinz Pudleiner

Rolf William Albach

Peter Jähn

Ulrich R Grigo

Hartmut Nefzger

Ulrich Eisele

Thomas Elsner

Dennis Hönel

Ralf Dujardin

Sebastian Dörr

Hans-Georg Hoppe

Burkhard Köhler

Thomas Büsgen

Joachim Simon

Gerhard Maier

Jens Krause

Reinhard Albers

Christian Weber

Jörg Büchner

Wolfgang Wehnert

Hans-Albrecht Freitag

Carsten Benecke

Stefanie Eiden

Eduard Mayer

Helmut Schmid

James-Michael Barnes

Jurgen Wirth

Hubert Ehbing

Werner Jenninger

Eberhard Jurgens

Karl Peltzer

Jacqueline Kusan-Bindels

Dagmar Ulbrich

Hermann-Josef Kirschbaum

Erich Meier

Klaus Jost

Evelyn Peiffer

Peter Heitk&auml;mper

Stephanie Vogel

Daniel Rudhardt

Hartwin Hobler

Christian Wolfrum

Thomas M&uuml;nzmay

Jurgen Faehndrich

Stefan Spange

Robert Gärtner

Thomas Bernert

Andreas Nübler

Reimund Gerhard

Ruy Alberto Altafi

Werner Wirges

Thomas Herweg

Michael Gladisch

Jürgen Gollan

Romy Jaeschke

Thomas Buesgen

Ayse Cochet

Robert GÄRTNER

Ruy Alberto Altafim

The present invention relates to a process for producing a dielectric polyurethane film, in which at least the following steps are performed continuously: I) a mixture comprising: a) a compound containing isocyanate groups and having a content of isocyanate groups of &#x3e;10% by weight and &#x2266;50% by weight, b) a compound containing isocyanate-reactive groups and having an OH number of &#x2267;20 and &#x2266;150, at least one solvent having a vapor pressure at 20&#xb0; C. of &#x3e;0.1 mbar and &#x3c;200 mbar, at least one wetting additive, is produced, where the sum of the number-average functionalities of isocyanate groups and of isocyanate-reactive groups in the compounds a) and b) is &#x2267;2.6 and &#x2266;6, II) immediately after production thereof, the mixture is applied to a carrier in the form of a wet film, III) the wet film is cured to form the polyurethane film and IV) the polyurethane film is separated from the carrier. The invention further provides a dielectric polyurethane film obtainable by the process according to the invention, a process for producing an electromechanical transducer, and an electromechanical transducer obtainable by this process.

Dielectric polyurethane film

The invention relates to an electro-switchable polymer film assembly having a first and a second surface side, comprising at least one pair of electrodes () and a polymer matrix (), wherein structuring particles () can be embedded in the polymer matrix and the polymer matrix or the structuring particles consist of an electro-active polymer, wherein furthermore, the first and/or the second surface sides can be transferred from a plane condition into a structured condition by electric switching of the electro-active polymer.

Electro-switchable polymer film assembly and use thereof

The present invention relates to an electromechanical converter, in particular an electromechanical sensor, actuator and/or generator, which comprises a polymer element obtainable from a reaction mixture comprising a polyisocyanate, a polyisocyanate prepolymer and a compound having at least two isocyanate-reactive hydroxy groups. The present invention additionally relates to a process for the production of such an electromechanical converter and to the use of a polymer element according to the invention as an electromechanical element. The present invention relates further to an electronic and/or electrical device comprising an electromechanical converter according to the invention and to the use of an electromechanical converter according to the invention in an electronic and/or electrical device.

Electromagnetic converter with a polymer element based on a mixture of polyisocyanate and isocyanate-functional prepolymer and a compound with at least two isocyanate reactive hydroxyl groups

The present invention relates to a method for producing an electromechanical, for example piezoelectric, transducer in which a first polymer layer comprising cutouts is applied to a first continuous polymer layer by means of a printing and/or coating method, a cover is applied to the first polymer layer comprising cutouts in such a way that the cutouts of the first polymer layer comprising cutouts are closed off with the formation of cavities, and the cover is connected to the first polymer layer comprising cutouts. The invention also relates to electromechanical transducers produced by the method according to the invention, and the use of said electromechanical transducers.

Process for the producing of an electromechanical transducer

The present invention relates to a ferroelectret multi-layer composite () comprising at least two polymer films arranged one on top of the other and bonded together, wherein voids are formed between the polymer films, said voids being tubular channels, particularly running parallel to one another. The invention further provides a process for the production of a ferroelectret multi-layer composite with parallel tubular channels, and a device for carrying out the process for the production of the ferroelectret multi-layer composite according to the invention. In addition, the invention relates to a piezoelectric element containing a ferroelectret multi-layer composite according to the invention.

Ferroeletret multilayer composite and method for producing a ferroelectret multilayer composite with parallel tubular channels

Electrochromic arrangement containing an anionic polyelectrolyte that has been neutralized with lithium and can be applied from aqueous solution.

Electrochromic arrangement

This invention relates to an apparatus and a process for rapidly and accurately dispensing fluids, in which at least one component is dispensed into the reaction vessel in two or three stages. In this process, the amount of fluid dispensed in the second and third stages is determined on the basis of the mass flow rate calculated in the preceding sub-step.

Process and apparatus for dispensing fluids

Rapid and efficient production and examination of formulations for polyurethane foams using only small amounts of materials are achieved by allowing the foam-forming mixture to foam in a container, preparing disks from sections of the container in which the foam is present and removing a plurality of cylindrical samples having substantially the same density from the disk.

Screening process for the production and characterization of polyurethane foam materials

The present invention relates to polyurethane cast elastomers which are prepared from higher molecular weight polyhydroxy compounds, durene diisocyanate and low molecular weight chain-lengthening and/or crosslinking agents. These elastomers are particularly useful for the production of moldings exposed to high mechanical stresses.

Polyurethane cast elastomers based on durene diisocyanate

Molding compositions comprising polyether block amide and homogeneously distributed antimicrobially active substances are disclosed. The compositions are suitable for molding a variety of articles, notably medical articles.

Polyether block amides containing active substances

A thermoplastic polyurethane elastomer is disclosed obtained by reacting

Thermoplastic polyurethanes with improved melt flow

The present invention is directed to a process for the production of moldings from plastic forming materials in metal molds comprising coating at least a portion of the internal walls of the mold with an external mold release agent, introducing the plastic forming material into the mold, closing the mold, and removing the product from the mold, the improvement wherein the external mold release agent comprises one or more organic compounds the molecules of contain on a statistical average

Process for producing moldings using a mold release agent

Process for pulverising polyurethane, polyurea and/or

The invention relates to a process for the preparation of single-layered or multilayered molded articles from particles of polyisocyanate-polyaddition products by shaping a specified mixtures under heat and pressure. The mixture contains quasi-thermoplastic particles of polyisocyanate-polyaddition products and one or more processing aids.

Process of making molded products

Composite structures are produced by placing at least two flat, thermoplastically formable plastic materials one above the other and thermoplasticially molding the materials under sufficient conditions of temperature and pressure that molding is accompanied by intimate union of individual layers of the structure. At least one of the plastic materials is based on a polyisocyanate polyaddition product having a density of at least 0.8 g/cm.sup.3 and is prepared by reacting:

Process for the production of composite structures

Growing community of inventors

Kö'ln, Germany

Joachim Wagner