Covestro Deutschland Ag

Bayer Materialscience Ag

Bayer Intellectual Property Gmbh

Lg Display Co., Ltd.

Covestro Intellectual Property Gmbh & Co. Kg

Styrolution Gmbh

Marc-Stephan Weiser

Friedrich-Karl Bruder

Horst Berneth

Konrad Knoll

Thomas Fäcke

Dennis Hönel

Thomas Rölle

Thomas Roelle

Rainer Hagen

Günther Walze

Sebastian Dörr

Sascha Plug

Hyungseok Bang

Guensik Lee

Christian Diedrich

Ute Flemm

Dennis Honel

Jörg Hofmann

Georgios Tziovaras

Sebastian Doerr

Heinz Pudleiner

Klaus Lorenz

Joachim Petzoldt

Helmut Steininger

Werner Hoheisel

Dirk Dijkstra

Rolf Mülhaupt

Heejin Im

Thomas Peter Facke

Kira Planken

Stefan Janke

Pantea Nazaran

Roland Künzel

Nicolas Stöckel

Nicolas Stoeckel

Jan Suetterlin

Sascha Tadjbach

Claudine Stoye

Daniel Hentschel

Jeff Motley

Thomas Peter FÄCKE

Dennis HÖNEL

François Deuber

The invention relates to a process for producing a composite material for wound dressings, comprising the following steps: (I) providing a first film, having a first film surface and a second film surface running virtually parallel to the first film surface: (II) mixing an NCO-terminated polyurethane prepolymer with at least water to give a polyurethane prepolymer/water mixture, (III) applying the polyurethane prepolymer/water mixture to at least one part of the first film surface to form a layer, the layer having a first layer surface which is in contact with the first film via at least one part of the first film surface, and having a second layer surface which runs virtually parallel to the first layer surface; (IV) covering at least one part of the second layer surface with a further film, wherein the bond strength between the first film and the layer and also between the layer and the further film is greater in each case than the tensile strain at break of the layer. The invention further relates to a composite material produced by the process of the invention and also to a wound dressing comprising such a composite material and also to the use thereof in a wound dressing for improving the absorption of wound secretion and the distribution of secretion in the wound dressing.

Method for producing an adhesive-free wound contact composite material

The invention provides a process for producing polyurethane foams, in which compositions comprising

Process for producing elastic and tear-resistant polyurethane foams and uses

The present invention relates to a viscoelastic element comprising a polyurethane foam, wherein the polyurethane foam can be obtained by reacting at least one isocyanate-functional prepolymer (VI) in the presence of a special polyurethane urea dispersion (V2), wherein the reaction of the prepolymer (VI) takes place in the presence of the polyurethane urea (V2) with a medium containing isocyanate-reactive groups. The invention also relates to a method for producing the viscoelastic element and to the use thereof.

Viscoelastic element based on a polyurethane foam

The invention relates to a method for producing a holographic optical element by providing a recording stack comprising at least one recording element laminated on at least one supporting element, irradiating at least a part of the recording stack with at least one recording beam in an irradiating step, wherein during the irradiating step, the recording stack bends, providing a bending deviation threshold for the recording stack, and adjusting at least one first process parameter such that an expected maximum bending deviation of the recording stack does not exceed the bending deviation threshold, wherein the at least one first process parameter influences the bending behaviour of the recording stack during the irradiating step.

Method for producing a holographic optical element

The invention relates to a contact adhesive product, comprising a substrate and a polyurethane resin, which can be obtained by reacting at least A) an aliphatic polyisocyanate component having an average isocyanate functionality of &#x2265;1.8 and &#x2264;2.6, B) a polymeric polyether polyol component, C) an amino-functional chain extender component having at least 2 isocyanate-reactive amino groups, containing at least one amino-functional connection C1), which has no ionic or ionogenic group and/or an amino-functional compound C2), which has ionic or ionogenic groups, D) possibly further hydrophilic components which are different from C2), E) possibly hydroxy-functional compounds having a molecular weight of 62 to 399 mol/g, F) possibly further polymeric polyols which are different from B), G) a compound, which has precisely one isocyanate-reactive group, or a compound, which has more than one isocyanate-reactive group, wherein only one of the isocyanate-reactive groups reacts under the selected reaction conditions with the isocyanate groups present in the reaction mixture, and H) possibly an aliphatic polyisocyanate component having an average isocyanate functionality of &#x3e;2.6 and &#x2264;4, wherein the components B) and F) together contain &#x2264;30 wt % on component F), based on the total mass of the components B) and F). The invention further relates to a method for producing the contact adhesive product, to a special polyurethane resin, and to a contact adhesive comprising said polyurethane resin.

Contact adhesive product based on polyurethane resin, production thereof, and corresponding contact adhesive

The present invention relates to an adhesive producible from an aqueous polyurethaneurea dispersion comprising an amorphous polyurethaneurea (V1) obtainable by reacting at least The invention likewise provides an adhesive layer and a product including the adhesive, a process for producing the adhesive layer, a specific polyurethaneurea, and the use of the adhesive and a kit having components (V1) and (V2).

Adhesive based on a special polyurethaneurea with adjustable bonding force, and production and use thereof

The invention relates to a method for selecting compounds which can be used as additives in photopolymer formulations for producing light holographic media, and to photopolymer formulations which contain at least one softener which are selected according to the claimed method. The invention also relates to the use of photopolymer formulations for producing holographic media.

Selection method for additives in photopolymers

The invention relates to an indirect lighting arrangement () comprising at least one cylindrical waveguide (). At least one end () of the cylindrical waveguide () is designed to couple light from a first light source () into the cylindrical waveguide (), and the lateral surface () of the cylindrical wave guide () has a coupling section () which is designed to optically couple the cylindrical waveguide () to an arrangeable plate-shaped waveguide (). At least the coupling section () has at least one holographic optical element () which is designed to emit light from the cylindrical waveguide () into the arrangeable plate-shaped waveguide ().

Indirect lighting arrangement, and method for producing an indirect lighting arrangement

The invention relates to an illumination device for illuminating at least one light modulator system of a liquid crystal display, the device comprising at least one waveguide substrate for guiding at least one targeted light beam that can be coupled into the waveguide substrate. The waveguide substrate is at least in optical contact with at least one holographic optical decoupling substrate comprising a plurality of decoupling regions and a decoupling region is at least designed to decouple part of the targeted light beam in the form of a plurality of sub-beams in the direction of the light modulator system. At least one diffuser module is provided, said diffuser module being designed in such a way that at least the outermost sub-beams of two neighboring decoupling regions are at least adjacent to one another before exiting the diffuser module.

Illumination device for a liquid crystal display

The invention relates to a method for producing a holographic optical element by providing a recording stack comprising at least one recording element laminated on at least one supporting element, irradiating at least a part of the recording stack with at least one recording beam in an irradiating step, wherein during the irradiating step, the recording stack bends, providing a bending deviation threshold for the recording stack, and adjusting at least one first process parameter such that an expected maximum bending deviation of the recording stack does not exceed the bending deviation threshold, wherein the at least one first process parameter influences the bending behavior of the recording stack during the irradiating step.

The invention relates to a photopolymer formulation comprising a component reactive toward isocyanates, a polyisocyanate component, a writing monomer and a photoinitiator containing at least one dye and a coinitiator, characterized in that the coinitiator contains at least one substance of the formula (Ia)  The invention further provides a process for preparing the specific coinitiators and the coinitiators obtainable by this process, and additionally a process for producing a holographic medium using the specific coinitiators, and a holographic medium obtainable using the inventive photopolymer formulation. The invention further relates to a laminate structure comprising an inventive holographic medium and likewise specific borates suitable as coinitiators.

Photopolymer formulation for production of holographic media comprising borates with low TG

The invention relates to a photopolymer formulation comprising specific aromatic glycol ethers as writing monomers, matrix polymers and a photoinitiator. The invention further provides an unexposed holographic medium obtainable using an inventive photopolymer formulation, and an exposed holographic medium obtainable by exposing a hologram into an inventive unexposed holographic medium. The invention likewise provides a visual display comprising an inventive exposed holographic medium, for the use of an inventive exposed holographic medium for production of chip cards, identification documents, 3D images, product protection labels, labels, banknotes or holographic optical elements, and specific aromatic glycol ethers.

Aromatic glycol ethers as writing monomers in holographic photopolymer formulations

The invention relates to a photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer, and a photoinitiator, containing a coinitiator and a dye having the formula F An, where F stands for a cationic dye and An&#x2033; stands for an anion, wherein the dye having the formula F An comprises a water absorption of =5%. The invention further relates to a holographic medium, in particular in the form of a film, containing a photopolymer formulation according to the invention, to the use of such a medium for recording holograms, and to a special dye that can be used in the photopolymer formulation according to the invention.

Photopolymer formulations for producing holographic media having highly crosslinked matrix polymers

The invention relates to a method of selecting photoinitiator systems comprising at least one sensitizer and at least one coinitiator, for photopolymer formulations for producing holographic media.

Method for selecting photoinitiator systems

Growing community of inventors

Leverkusen, Germany

Marc-Stephan Weiser