Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 ?1.8 and ?2.

Abstract: The invention relates to an indirect lighting arrangement (2, 2.1, 2.2, 2.3, 2.4, 2.5) comprising at least one cylindrical waveguide (4). At least one end (12.1, 12.2) of the cylindrical waveguide (4) is designed to couple light from a first light source (1) into the cylindrical waveguide (4), and the lateral surface (10) of the cylindrical wave guide (4) has a coupling section (6) which is designed to optically couple the cylindrical waveguide (4) to an arrangeable plate-shaped waveguide (16). At least the coupling section (6) has at least one holographic optical element (8) which is designed to emit light from the cylindrical waveguide (4) into the arrangeable plate-shaped waveguide (16).

Abstract: A microelectronic package is described with an illuminated backside exterior. In one example, the package has a package substrate, a die attached to the package substrate, a cover over the die and the package substrate, a lamp, and a screen over the die, externally visible and optically coupled to the lamp so that when the lamp is illuminated the illumination is externally visible through the screen.

Abstract: The invention relates to an adhesive that can be produced from an aqueous polyurethane urea dispersion, containing an amorphous polyurethane urea, which can be obtained by reacting at least A) an aliphatic polyisocyanate component having an average isocyanate functionality of ?1.8 and ?2.

Abstract: The invention provides a process for producing polyurethane foams, the foams thus produced and the uses thereof. In the inventive process compositions comprising A) isocyanate-functional prepolymers obtainable by the reaction of A1) aliphatic, low molecular weight diisocyanates of molar mass from 140 to 278 g/mol with A2) polyalkylene oxides having an OH functionality of two or more, A3) optionally further isocyanate-reactive components not covered by A2), B) water in an amount of at least 2% by weight, based on the total weight of the composition; C) optionally heterocyclic 4-membered or 6-membered ring oligomers of low molecular weight, aliphatic diisocyanates having a molar mass of 140 to 278 g/mol; D) optionally catalysts; E) optionally salts of weak acids, the corresponding free acids of which have a pKA in water at 25° C. of ?3.0 and ?14.

Abstract: The invention provides a process for producing polyurethane foams, the foams thus produced and the uses thereof. In the inventive process compositions comprising A) isocyanate-functional prepolymers obtainable by the reaction of A1) aliphatic, low molecular weight diisocyanates of molar mass from 140 to 278 g/mol with A2) polyalkylene oxides having an OH functionality of two or more, A3) optionally further isocyanate-reactive components not covered by A2), B) water in an amount of at least 2% by weight, based on the total weight of the composition; C) optionally heterocyclic 4-membered or 6-membered ring oligomers of low molecular weight, aliphatic diisocyanates having a molar mass of 140 to 278 g/mol; D) optionally catalysts; E) optionally salts of weak acids, the corresponding free acids of which have a pKA in water at 25° C. of ?3.0 and ?14.

Abstract: 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.

Abstract: A process for the preparation of a sterilized ceramic body including or essentially consisting of stabilized zirconia of a defined colour, including the steps of: providing a ceramic primary body including or essentially consisting of stabilized zirconia of a first colour A, and sterilizing the primary body using radiation sterilization whereby the primary body undergoes a colour change to a colour B. The process includes the further step of irradiating the sterilized primary body with electromagnetic radiation of at least one wavelength lying in the wavelength band ranging from 150 nm to 700 nm to induce an at least partial reversal of the colour change to obtain a colour C of the sterilized ceramic body, the colour C complying with the following requirements in the CIELAB colour space: L* being from 54 to 95, a* being from ?15 to 15 and b* being from ?15 to 15.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to an indirect lighting arrangement (2, 2.1, 2.2, 2.3, 2.4, 2.5) comprising at least one cylindrical waveguide (4). At least one end (12.1, 12.2) of the cylindrical waveguide (4) is designed to couple light from a first light source (1) into the cylindrical waveguide (4), and the lateral surface (10) of the cylindrical wave guide (4) has a coupling section (6) which is designed to optically couple the cylindrical waveguide (4) to an arrangeable plate-shaped waveguide (16). At least the coupling section (6) has at least one holographic optical element (8) which is designed to emit light from the cylindrical waveguide (4) into the arrangeable plate-shaped waveguide (16).

Abstract: 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.

Abstract: 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.

Abstract: A process for providing fluoresence to a dental ceramic body by treating at least a portion of the outer surface of the dental ceramic body or a precursor thereof with a bismuth containing substance, characterized by the steps of placing the dental ceramic body or the precursor thereof into a closeable container, in particular a crucible; generating a bismuth containing atmosphere in the container and exposing at least a portion of the outer surface of the dental ceramic body or of the precursor to the bismuth containing atmosphere at a temperature above 1000° C.

Abstract: A microelectronic package is described with an illuminated backside exterior. In one example, the package has a package substrate, a die attached to the package substrate, a cover over the die and the package substrate, a lamp, and a screen over the die, externally visible and optically coupled to the lamp so that when the lamp is illuminated the illumination is externally visible through the screen.

Abstract: 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? 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.

Abstract: 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.