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:
Urethane acrylates of the general Formula (I), corresponding salts, solvates or solvates of a salt thereof: wherein R1, R2, R3, R4 and R5 each independently represent a substituent selected from the group consisting of hydrogen, halogens, C1-6-alkyls, trifluoromethyl, C1-6-alkylthios, C1-6-alkylselenos, C1-6-alkyltelluros, and nitro groups, with the proviso that at least one of R1, R2, R3, R4 and R5 is not hydrogen; R6 and R7 each independently represent a substituent selected from the group consisting of hydrogen and C1-6-alkyls; and A represents a saturated or unsaturated or linear or branched C1-6-alkyl radical or a polyalkylene oxide radical having 2-6 ethylene oxide or propylene oxide units; processes for producing and methods of using the same.
Abstract:
The invention relates to a photopolymer formulation comprising matrix polymers, writing monomers, and photoinitiators, wherein the writing monomers comprise compounds of formula (I), where at least one of the radicals R1, R2, R3, R4, R5, R6 is a radical bonded to the aromatic ring via X of formula (II), where, in formula (II), A is a linear or branched hydrocarbon, optionally comprising oxygen or nitrogen, the remaining radicals R1, R2, R3, R4, R5, R6 are, independent of each other, hydrogen or an organic radical, and R7 is hydrogen or methyl. The invention further relates to the use of the photopolymer formulation for producing holographic media.
Abstract:
The invention relates to a method for producing holographic films, in which a photopolymer formulation is provided which comprises as constituents matrix polymers, writing monomers, a photoinitiator system, optionally a non-photopolymerizable component and optionally catalysts, radical stabilizers, solvents, additives and other auxiliaries and/or additives. The photopolymer formulation is applied in a planar manner and in the form of a film on a support film and the photopolymer formulation is dried on the support film at a temperature 60 100 DEG C. and are above the temperature T by at least 30 DEG C., and a photopolymer formulation having a plateau module of =0.030 MPa is used.
Abstract:
The invention relates to a method for producing novel photopolymers on the basis of prepolymer-based polyurethane compositions that are suitable for producing holographic media, in particular for the visual display of images.
Abstract:
The invention relates to holographic media containing specific photopolymers, a process for the production thereof, and unsaturated glycidyl ether acrylate urethanes as writing monomers which are suitable for the preparation of photopolymers.
Abstract:
The invention relates to a photopolymer formulation comprising matrix polymers, writing monomers, and photo initiators, comprising a combination of at least two different writing monomers. The invention further relates to the use of the photopolymer formulation for producing optical elements, in particular for producing holographic elements and images, to a method for producing the photopolymer formulation and to a method for illuminating holographic media made of the photopolymer formulation.
Abstract:
The invention relates to a method for producing a holographic film, wherein a photopolymer formulation comprising matrix polymers, writing monomers, photoinitiator system, and optionally auxiliary materials and additives is provided, the photopolymer formulation is applied as a film to the surface of a substrate, and the film is dried, wherein a photopolymer formulation having a plateau module G0 of =0.03 MPa is used. The invention further relates to a holographic medium that can be obtained by means of the method according to the invention.
Abstract:
The present invention relates to novel self-developing films for incorporation of volume holograms by exposure, a method for production thereof and the use thereof.
Abstract:
The present invention relates to novel polyurethane compositions which are advantageous for the production of holographic media, inter alia for data storage, but also for optical applications of different types.