Bayer Aktiengesellschaft

Covestro Deutschland Ag

Bayer Intellectual Property Gmbh

Lg Display Co., Ltd.

Bayer Materialscience Ag

Covestro Intellectual Property Gmbh & Co. Kg

Sony Corporation

Agfa Gevaert Nv

Bayer Corporation

Agfa-gevaert

Bayer Healthcare Aktiengesellschaft

Bayer Healthcare LLC

Lanxess Deutschland Gmbh

Horst Berneth

Gert Jabs

Friedrich-Karl Bruder

Serguei Kostromine

Thomas Rölle

Dennis Hönel

Rainer Hagen

Ralf Neigl

Uwe Claussen

Thomas Fäcke

Marc-Stephan Weiser

Thomas Bieringer

Rafael Oser

Josef-Walter Stawitz

Günther Walze

Wilfried Haese

Dietrich Haarer

Roderich Raue

Hubertus Psaar

Karin Hassenruck

Henry Giera

Gunter Klug

Karlheinrich Meisel

Helmut-Werner Heuer

Alfred Brack

Stephan Michaelis

Hyungseok Bang

Guensik Lee

Thomas Böcker

Werner Hoheisel

Jürgen Kintrup

Paul R Callant

Masanobu Yamamoto

Herman J Uytterhoeven

Hans-Werner Schmidt

Horst Harnisch

Hidetoshi Watanabe

Ulrich Feldhues

Helmut Werner Heuer

Artur Botta

Frank Linke

Peter Roschger

Thomas Roelle

Yuichi Sabi

Peter Wild

Sakuya Tamada

Meinhard Rolf

Georgios Tziovaras

Klaus Leverenz

Takashi Iwamura

Mitsuaki Oyamada

Eberhard Kuckert

Thomas Sommermann

Peter Landenberger

Wolfgang Jacobsen

Karin Hassenr&uuml;ck

Hans-Joachim Vedder

Karin Hassenrück

Ralf Ruhmann

Heejin Im

Jochen Schaller

Christian Diedrich

Ute Flemm

Thomas Peter Facke

Joachim Rubner

Werner Hartwich

Hermann Womelsdorf

Igor Shelepin

Vladimir Gavrilov

Hans-Ulrich Siegmund

Luc Bastiaens

Jurgen Weisser

Daniel-Gordon Duff

Dirk Pfuetzenreuter

J&uuml;rgen Simmerer

Kerstin Pape

Dennis Honel

Felix Reichel

Rolf Richter

Karl-Heinrich Lange

Matthias Kocher

Jurgen-Rolf Hassdenteufel

Alison J Murray

G&uuml;nter Franke

Harro Tr&auml;ubel

Sascha Tadjbach

Guy Michel Van Ackere

Sergei Kostromin

Roland Wuttke

Joachim R&uuml;bner

Heiko Nied

Martin Kling

Daniel Hentschel

Hubert Psaar

Gunther Klug

Uwe Gessner

Axel Müller

Stephan Zilker

Carsten Frenz

Thomas Breiner

The invention relates to a process for preparing triaryl organo borates proceeding from organoboronic esters in the presence of an n-valent cation 1/n K, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Method for producing triarylorganoborates

The invention relates to a process for preparing triaryl organoborates proceeding from organoboronic esters in the presence of an n-valent cation 1/n K, comprising the anhydrous workup of the reaction mixture and the use of the triaryl organoborates obtained as co-initiator in photopolymer formulations, holographic media and holograms.

Provided herein is a process for preparing triaryl organoborates of the formula 1/n KRB&#x2014;R(IV), where one equivalent of organoboronic ester of the formula B&#x2014;R(OR)(OR) (I) is initially charged together with 1/n equivalents of salt KnX(II) and 3 equivalents of metal M in a solvent or a solvent mixture S1, 3 equivalents of a haloaromatic R&#x2014;Y (III) are added, an auxiliary L and optionally a second organic solvent or solvent mixture S2 is added and the compound 1/n KRB&#x2014;R(IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.

Provided herein is a process for preparing triaryl organoborates proceeding from alkyl or cycloalkyl boronates in the presence of an n-valent cation 1/n Kto obtain organoborates of the formula 1/n KRB&#x2014;R(IV), where one equivalent of organoboronic ester of the formula B&#x2014;R(OR)(OR) (I) is initially charged together with 1/n equivalents of salt KnX(II) and 3 equivalents of metal M in a solvent or a solvent mixture, 3 equivalents of a haloaromatic R&#x2014;Y (III) are added, and optionally a second organic solvent water is added and the compound 1/n KRB&#x2014;R(IV) is separated off with the organic phase, and to the use of these substances as co-initiator in photopolymer formulations.

Process for the production of triaryl organoborates

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 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 naphthyl urethane acrylates particularly useful as writing monomers in photopolymer formulations for holographic media. The invention further relates to a photopolymer formulation comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, to a holographic medium comprising matrix polymers, writing monomers and photoinitiators, wherein the writing monomers comprise a naphthyl urethane acrylate according to the invention, and also to a display comprising a holographic medium according to the invention.

Naphthyl acrylates as writing monomers for photopolymers

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 present invention provides a novel photopolymer formulation comprising matrix polymers, writing monomer and a photoinitiator and further comprising a compound of formula (1) where A, Aand Aare each independently hydrogen, fluorine, chlorine, bromine or iodine, R, R, R, Rand Rare each independently hydrogen, halogen, cyano, nitro, amino, alkylimino, azide, isonitrile, enamino, formyl, acyl, carboxyl, carboxylate, carboxamide, orthoester, sulphonate, phosphate, organosulphonyl, organosulphoxidyl, optionally fluorinated alkoxy or an optionally substituted aromatic, heteroaromatic, aliphatic, araliphatic, olefinic or acetylenic radical while suitable radicals may be connected together via bridge of any desired substitution, or in that two or more compounds of formula (I) may be connected together via at least one of the radicals R, R, R, Rand R, in which case these radicals therein constitute a 2- to 4-tuply functional bridge, with the proviso that at least one of the radicals R, R, R, Rand Ris not hydrogen. Further subjects of the invention are a photopolymer comprising matrix polymers, a writing monomer and photoinitiator, a holographic medium comprising a photopolymer formulation of the present invention or being obtainable by use thereof, the use of a holographic medium of the present invention and also a process for producing a holographic medium by using a photopolymer formulation of the present invention.

Holographic media with improved light sensitivity

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

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&#xb0; 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)1&#x2212;0&#x3e;&#x2212;0.25&#x2003;&#x2003;(formula II).

Composite comprising a substrate and a photopolymer film

Growing community of inventors

Leverkusen, Germany

Horst Berneth