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 an assembly comprising a substrate and a photopolymer film, which are joined to one another partably at least in sections, the substrate comprising polyethylene terephthalate, and the photopolymer film comprising three-dimensionally crosslinked polyurethane matrix polymers, a writing monomer and a photoinitiator, characterized in that the substrate, after seven-day incubation at 23° C. in a 0.5 volume percent butyl acetate solution of the dye of formula (I) has an L value L1 and before the incubation an L value of L0, the L values being determined by CieLAB measurements, and the difference between the L values L1 and L0 satisfying the formula (II) L1?L0>?0.25??(formula II).

Abstract: The present invention relates to a security document and/or document of value with a hologram in a visually changeable window as a novel security element, and also to a method for producing the same.

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: The invention relates to polycarbonate-based or copolycarbonate-based security documents and/or documents of value which contain at least one hologram integrated in the card body, and to a method for producing such security documents and/or documents of value.

Abstract: The present disclosure relates to a method for producing a beam shaping holographic optical element, which is configured to generate diffracted beams configured to reconstruct an image of a diffusor irrespectively of the point of impact of a pencil of light on the beam shaping holographic optical element, comprising providing a recording element, providing a master element comprising a particular pattern, forming a recording stack comprising the recording element and the master element such that the master element is arranged to the recording element in a closed-copy distance, irradiating at least a part of the recording stack with a reconstruction beam, irradiating at least a part of the recording stack with a reference beam, wherein at least one of the reconstruction beam or reference beam penetrates the master element to record the pattern of the master element onto the recording element.

Abstract: The invention relates to photopolymer formulations based on a polymeric network as a matrix and at least one photopolymerizable monomer dissolved therein and to a method for the production of holographic media from such photopolymers and to the use thereof.

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 an assembly comprising a substrate and a photopolymer film, which are joined to one another partably at least in sections, the substrate comprising polyethylene terephthalate, and the photopolymer film comprising three-dimensionally crosslinked polyurethane matrix polymers, a writing monomer and a photoinitiator, characterized in that the substrate, after seven-day incubation at 23° C. in a 0.5 volume per cent butyl acetate solution of the dye of formula (I) has an L value L1 and before the incubation an L value of L0, the L values being determined by CieLAB measurements, and the difference between the L values L1 and L0 satisfying the formula (II) L1?L0>?0.25 ??(formula II).

Abstract: The subject matter of the invention is a method for producing illuminated, holographic media comprising a photopolymer formulation having the adjustable mechanical modulus GUV. A further subject matter of the invention is an illuminated, holographic medium that can be obtained by means of the method according to the invention.

Abstract: A device for measuring edge and rounding features on a piston ring includes a planar support element for the piston ring, a stop operatively connected thereto for bearing defined piston ring sections thereon, and a measuring unit, which is disposed at a predefinable angle with respect to the support element or the stop.

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: Process for preparing an osteointegrative surface on a ceramic body by chemically modifying at least a part of the surface of the body. The process includes the subsequent steps of depositing a calcium phosphate mineral on the surface of a ceramic basic body by projecting agglomerates of particles comprising the calcium phosphate mineral towards the basic body, and heating the basic body with the calcium phosphate mineral deposited thereon.

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: A process for preparing a ceramic body having a surface roughness, said process comprising the step of depositing particles of a ceramic material on the surface of a ceramic basic body. The process is characterized in that separate agglomerates comprising at least two particles and a binder binding the particles together are deposited on the surface of the basic body by projecting the agglomerates towards the basic body.

Abstract: The invention relates to a photopolymer formulation comprising polyurethane matrix polymers, writing monomers, and photoinitiators, wherein the writing monomers comprise compounds of formula (I), where R1, R2, R3 independent of each other are each a halogen atom or an organic radical, wherein at least one of the radicals is an organic radical comprising a radiation hardening group. The invention further relates to the use of the photopolymer formulation for producing holographic media.

Abstract: The present invention relates to novel photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer and a photoinitiator comprising a dye of formula (I). The present invention further relates to a holographic medium which contains a photopolymer formulation of the present invention or is obtainable by using same, to the use of a photopolymer formulation of the present invention for producing holographic media and also to a process for producing a holographic medium by using a photopolymer formulation of the present invention.

Abstract: The present invention relates to a photopolymer formulation containing chemically crosslinked matrix polymers, writing monomers and a photoinitiator system, wherein the photoinitiator system contains a HABI, a dye attuned to the HABI and having an absorption maximum in the range of 400-800 nm and a hydrogen donor. The present invention further relates to a process for producing exposed holographic media with the above photopolymer formulation.

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 present invention relates to a layer composite comprising an exposed photopolymer film and an adhesive layer which is connected to the photopolymer film at least in certain regions, wherein the photopolymer film comprises crosslinked polyurethane matrix polymers A), crosslinked writing monomers B) and a monomeric fluoroethane additive C), wherein the adhesive layer is in the form of a diffusion barrier for the fluoroethane additive C). The invention also relates to the use of the layer composite for producing chip cards, ID documents or 3D images, as a product protective label, as a label, in banknotes in the form of a strip or window or as holographically optical elements in displays.