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52
resultados
Última actualización
20/09/2024 [07:45:00]
Resumen de: US2024309174A1
The present invention relates to radically curable compositions, comprising (A) silver nanoplatelets, (B) one reactive diluent comprising 1 to 4 (meth)acrylate groups; (C) one, or more urethane (meth)acrylates (C), which are obtainable by reaction of the following components:(a) at least one isocyanate having two isocyanate groups,(b) at least one polyalkylene oxide polyether having at least 2 hydroxyl groups,(c) at least one hydroxy-functional (meth)acrylate having one hydroxyl group and one (meth)acrylate group,(d) at least one compound having at least one isocyanate reactive group and at least one acid function,(e) if component (d) is present, optionally at least one basic compound which is present for neutralization or partial neutralization of the acid groups of component (d),(f) optionally at least one monoalcohol having one hydroxy function, and(g) optionally at least one compound having at least one primary and/or secondary amino group;(D) one, or more photonitiators; printing inks containing the compositions and their use for the production security products. Coatings obtained after curing of the compositions, show one color, when observed in transmission and another color, when observed in reflection on both sides of the cured coating. The metal-like reflection of the coatings may be further enhanced by the presence of surfactants.
Resumen de: US2024312235A1
Systems, devices, methods, and instructions for travel document validation, including receiving data for one or more travel documents, generating a set of features for artificial intelligence model training, validating, and testing, upon receiving data for a plurality of travel documents, data from a first subset of travel documents is used to train an artificial intelligence model, a second subset of travel documents is used to validate the artificial intelligence model, and a third subset of travel documents is used to test the artificial intelligence model.
Resumen de: WO2023148511A1
The present invention relates to a method of protecting a metal surface from damage or removal during an alkaline de-metallization process, comprising printing a water- based resist composition onto a metal-coated filmic substrate, thereby protecting the 5 metal surface from damage or removal during the de-metallization process, wherein the water-based resist composition comprises a cationic acid-soluble resin or cationic acid-stabilized resin and water.
Resumen de: WO2023083827A1
A data carrier (1) comprises at least one carrier body (2), at least one printing layer (3), at least one marking layer (4), and at least one security element (5). The carrier body (2) can comprise a top surface (6) and the printing layer (3) can be arranged on the top surface (6). The printing layer (3) and the marking layer (4) are arranged at least partially above one another with respect to an extension direction (E). The marking layer (4) is configured to interact with impinging electromagnetic radiation (R) such, that a marking element (8) is generated in the marking layer (4) upon the irradiation of electromagnetic radiation (R). The security element (5) comprises at least part of the printing layer (3) and at least part of the marking layer (4). The printing layer (3) comprises at least one reactive element (9) that is configured to interact with impinging electromagnetic radiation (R) such, that a reacted element (10) is generated in the printing layer (3) upon the irradiation of electromagnetic radiation (R). The marking element (8) can be an opaque element. The security element (5) furthermore comprises the reacted element (10) and the marking element (8).
Resumen de: CN118176115A
Disclosed is an article comprising a substrate, an image printed on the substrate; wherein the image comprises two or more types of pixels; wherein the two or more types of pixels are selected from the group consisting of RGB pixels, RGBW pixels, and mixed pixels; and wherein at least one type of pixel of the two or more types of pixels comprises an optically variable pigment. Methods of making and using the articles are also disclosed.
Resumen de: US2024301215A1
Disclosed here are a method of marking a dark-colored surface with a dark-colored LiDAR-reflective material and a marking composition comprising the dark-colored LiDAR-reflective material and a marking carrier. Particularly, the dark-colored LiDAR-reflective material comprises has a reflectivity in the visible spectrum of electromagnetic radiation that is ≤10% and a reflectivity in the near-IR and LiDAR spectrum of electromagnetic radiation that is ≥10%.
Resumen de: WO2024186997A1
Disclosed here are a method of marking a dark-colored surface with a dark-colored LiDAR-reflective material and a marking composition comprising the dark-colored LiDAR-reflective material and a marking carrier. Particularly, the dark-colored LiDAR-reflective material comprises has a reflectivity in the visible spectrum of electromagnetic radiation that is ≤ 10% and a reflectivity in the near-IR and LiDAR spectrum of electromagnetic radiation that is ≥ 10%.
Resumen de: EP4428207A2
Composition d'encre pour l'impression par jet continu dévié, liquide à la température ambiante, comprenant :a) un solvant comprenant, de préférence constitué par, un ou plusieurs composé(s) solvant(s) organiques, et éventuellement de l'eau;b) un liant, comprenant au moins une résine liante ;c) au moins un plastifiant de ladite résine liante ;d) au moins un colorant qui appartient à la famille des colorants anthraquinones ;e) éventuellement, au moins un ou plusieurs autres colorant(s) et/ou pigment(s) qui n'appartiennent pas à la famille des colorants anthraquinones.Procédé de marquage d'un substrat, support ou objet utilisant ladite composition d'encre.Substrat, support, ou objet pourvu d'un marquage obtenu par séchage, et/ou absorption de ladite composition d'encre.Utilisations de la combinaison d'un liant comprenant au moins une résine liante, d'au moins un plastifiant de ladite résine liante et d'au moins un colorant appartenant à la famille des colorants anthraquinones, dans une composition d'encre pour l'impression par jet continu dévié, liquide à la température ambiante.
Resumen de: US2024208258A1
An optical security feature has pixels with faceted microstructures supporting nano-patterned optical filters. Each of the pixels includes a substrate and a nanostructure. The substrate is configured to emit light of at least a first wavelength and a second wavelength different than the first wavelength. The microstructure includes a first facet, a second facet non-parallel to the first facet, a first nano-patterned optical filter disposed on the first facet, and a second nano-patterned optical filter disposed on the second facet. The first nano-patterned optical filter includes a first stopband that includes the first wavelength and excludes the second wavelength. The second nano-patterned optical filter includes a second stopband that includes the second wavelength and excludes the first wavelength. For each pixel, the first nano-patterned optical filter inhibits emission of light at the first wavelength from the pixel via the first facet.
Resumen de: WO2024180326A1
Optically variable security device comprising: a substrate (10); an array of focussing elements (20, 21) disposed in or on the substrate; and an image array (30) disposed in or on the substrate and overlapping with the array of focussing elements, wherein the image array comprises at least first (11) and second (12) sets of image elements, the first set of image elements and the second set of image elements being interleaved with each other, wherein the image array comprises a first ink and a second ink different from the first ink, one or both of the first and second inks comprising a luminescent material.
Resumen de: WO2024181214A1
Provided is an optical display medium with a display surface, the optical display medium comprising: a reflective polarizer layer which is provided in a reflection area RL that is a portion or the entirety of the display surface; a first birefringence layer which is provided in a more visible side than the reflective polarizer layer and in an area RA that occupies a portion of the reflection area RL; and a second birefringence layer which is provided in a more visible side than the reflective polarizer layer and in an area RB that occupies a portion or the entirety of an area other than the area RA of the reflection area RL, wherein the reflective polarizer layer has a function of reflecting non-polarization from a direction of a polar angle of 55° as elliptic polarization or linear polarization, the first birefringence layer has an in-plane phase difference Re(A)0 satisfying Re(A)0≦30 nm, the first birefringence layer has an oblique phase difference Re(A)55 satisfying 60 nm≦Re(A)55≦700 nm, the second birefringence layer has an in-plane phase difference Re(B)0 satisfying Re(B)0≦30 nm, the second birefringence layer has an oblique phase difference Re(B)55 satisfying 60 nm≦Re(B)55≦700 nm, and the oblique phase difference Re(A)55 and the oblique phase difference Re(B)55 satisfy Re(B)55-Re(A)55>0 nm.
Resumen de: US2024294790A1
The present invention relates to the technical field of varnishes for protecting security documents, such as banknotes, against premature detrimental influence of soil and/or moisture upon use and time. In particular, the present invention provides a hybrid UV-LED radiation curable protective varnish comprising:a) from about 60 wt-% to about 85 wt-% of either a cycloaliphatic epoxide, or a mixture of a cycloaliphatic epoxide and one or more cationically curable monomers other than the cycloaliphatic epoxide;b) from about 3 wt-% to about 15 wt-% of one or more radically curable monomers and/or oligomers;c) from about 1 wt-% to about 6 wt-% of a diaryl iodonium salt;d) from about 0.5 wt-% to about 3 wt-% of a free radical photoinitiator selected from the group consisting of alpha-hydroxyketones, alpha-alkoxyketones, benzyl diketals, benzoin ethers, phosphine oxides, phenylglyoxylates, and mixtures thereof;e) from about 0.01 wt-% to about 5 wt-% of a non-ionic surfactant; andf) a photosensitizer of general formula (I)wherein the weight percents are based on the total weight of the hybrid UV-LED radiation curable protective varnish.
Resumen de: GB2627801A
An optically variable security device 110 comprises a substrate 10; an array of focussing elements 20 disposed; and an image array 30 overlapping with the array of focussing elements. The focussing elements and the image array cooperate with each other such that at first and second ranges of viewing angles respective images A, B are exhibited to the viewer. The image array comprises different first and second inks. One or both of the first and second inks comprises a luminescent material which luminesces in response to irradiation at least one excitation wavelength. The first and second inks each exhibit a respective non-luminescent visible colour when illuminated with a first illumination condition that comprises illumination with visible light in the absence of the at least one excitation wavelength, and one or both of the first and second inks exhibit a visible colour when illuminated with a second illumination condition that comprises illumination with the at least one excitation wavelength. The first and second inks exhibits a different visual appearance when illuminated with the first illumination condition compared to when illuminated with the second illumination condition.
Resumen de: AU2023264715A1
The invention relates to a security document (02) with a transparent window (04) which is formed in the security document substrate (26) and which comprises a micro-optical structure (03) consisting of microlenses (11). At least one printed image (27) is arranged on the other substrate (26) face lying opposite the micro-optical structure (03) at least in the region of the transparent window (04), wherein the printed image (27) in question has multiple image elements (28a to 28j) in a punctiform or linear pattern, and the pixel size (38) or the line thickness (38) of said image elements (28a to 28j) is designed to be smaller than the lens width (18) of the microlenses (11) arranged in the micro-optical structure (03) in each case. A laminar expanded layer (39) which covers the printed image (27) in question is arranged on at least one section of the printed image (27) in question on the printed image face facing away from the micro-optical structure (03). The layer (39) which covers the printed image (27) in question is produced in an inkjet printing method, and the layer (39) is designed to be transparent to an electromagnetic radiation with a wavelength ranging from 380 nm to 780 nm, the degree of transparency to said electromagnetic radiation ranging between 10% and 90%. The transparency is designed to vary gradually over the planar two-dimensional extension of the layer (39) covering the printed image (27) in question such that at least one location of the layer (39) or so
Resumen de: WO2023072740A1
The present invention relates to a decorative, or security element and a method for producing the decorative, or security element. The decorative, or security element comprises in this order (a) a substrate; (b) a coating, comprising transition metal particles (A) having a number mean diameter of from 15 nm to 700 nm, wherein the transition metal is selected from silver, copper, gold and palladium, especially silver and copper, very especially silver; (c) optionally a protective coating; wherein the coating (b) is derived from (b1) a solvent based composition, comprising the transition metal particles and a vehicle; and (b2) the coating (b) has a three layer structure: (b2a) a layer, comprising the transition metal particles and a vehicle; (b2b) a layer, comprising the vehicle, which is essentially free of transition metal particles; (b2c) a layer, comprising the transition metal particles and the vehicle. The method comprises the steps of i) applying a solvent based composition comprising transition metal particles and the vehicle; on at least part of the surface of the substrate, and ii) drying the solvent based composition; iii) curing the solvent based composition so as to form the three-layer structure which exhibits intensive angle-dependent colors in reflection on the coating side and/or on the substrate side of the decorative, or security element and a distinctive color in transmission; and iii) optionally applying a protective coating on the coating (b). The three-la
Resumen de: US2024287281A1
The present invention relates to compositions, comprising(A) platelet-shaped transition metal particles, wherein the number mean diameter of the platelet-shaped transition metal particles, present in the composition, is in the range of from 15 nm to 1000 nm, the transition metal is selected from silver, copper, gold and palladium, especially silver and copper, very especially silver;(B) one, or more reactive diluents (B);(C) one, or more oligomers (C);(D) one, or more photoinitiators (D);(E) at least a surfactant (E), which is a block copolymer, comprising at least a block A and a block B, whereina) the block A comprisesa1) monomer units (A1) derived from a compound selected from alkyl (meth)acrylates, alkyl (meth)acrylamides, or any mixture thereof, anda2) monomer units (A2) derived from a hydroxy group, or ether group containing alkyl (meth)acrylate;b) the block B comprises monomer units (B) derived from a compound selected from fluorinated (meth)acrylic esters of formulaH2C═CR46(C(O)ORF-1) (XX), whereinR46 is H, or a methyl group; andRF-1 is an organic residue containing a perfluorinated alkyl group;(F) optionally one, or more polymeric binders;(F) optionally one, or more solvents; and(H) optionally further additives.The coatings, obtained with said compositions, show one color, when observed in transmission and another color, when observed in reflection on both sides of the cured coating.
Resumen de: WO2024177533A1
The group of inventions relates to the field of creating materials for use in protecting information carriers against counterfeit and reliably authenticating same. Proposed is a composite luminescent material consisting of at least two luminescent components that form an inseparable compound having a core-shell structure, or a laminar structure, or a xerogel structure. The luminescent components have different luminescence spectra within the spectral range of 370-780 nm and have the same or overlapping excitation spectra. The luminescence emission bands of the luminescent components have different afterglow durations that differ by at least 20%. A method for producing a luminescent material includes applying, to particles containing a first luminescent component, an intermediate layer of nano-sized spherical particles of silicon dioxide, and subsequently precipitating other luminescent components from a liquid phase onto the resulting surface over a set period of time. A second embodiment of the method includes producing a hydrogel, introducing luminescent components in a given concentration into said hydrogel, and subsequently removing the liquid phase. An information carrier has applied to the surface thereof or introduced into the composition thereof a protective marking that contains the claimed composite luminescent material. The technical result is that of enhancing the security of information carriers and enabling authentication thereof once in circulation by virtue of
Resumen de: US2024286429A1
A security feature is presented for a security or value document. The security feature comprises a zinc sulfide luminophore in the form of particles. The zinc sulfide luminophore has the general chemical formula ZnS:Cux, My, Xz; here, M represents one or more elements from a group comprising the chemical elements Co, In and Ni; X represents one or more elements from a group comprising the halides F, Cl, Br and I; and the following applies: 0<x<0.002 and 0::; y<0.00015 and 0::; z<0.00050. The particles each have cubic phase portions and hexagonal phase portions. When excited by an electrical field, the zinc sulfide luminophore emits a first radiation in the range of the light spectrum between 580 nm and 780 nm. When excited by heating the luminophore to a temperature between 100° C. and 150° C., the zinc sulfide luminophore emits a second radiation in the light spectrum.
Resumen de: WO2023067277A1
System for establishing and managing the certificate of ownership of an object (O) comprising: a central unit (1) and a marking unit (2); the marking unit (2) comprises an inkjet device (21) for marking with invisible ink, which is readable under a determined illumination, with a view to placing a mark (M) on the object (O). An image-capturing unit (22) allows the image of the location (IE) of the mark on the object to be taken, and object data (DO) comprising the mark (M) and the photo of its location (IE) to be formed; these data (DO) are transmitted to the central unit (1) with a view to generating the certificate of ownership (CP) associated with the object (O).
Resumen de: US2024279486A1
The present invention provides an antifog-film-attached transparent article for security cameras that includes: a transparent base; and an antifog film on a surface of the transparent base, wherein the antifog film includes: at least one selected from the group consisting of a silane coupling agent and a cross-linked structure derived from the silane coupling agent; a water-absorbing polymer, a polyether-modified siloxane; and a C2-C8 diol.
Resumen de: US2024278591A1
Forming a 3D image using a lenticular structure includes a carrier layer having an arrangement of color sub-pixels and a lenticular array comprising convergent lenses facing the sub-pixels. A method includes performing visual inspection of the lenticular structure, during which sub-pixels viewable through the lenses are detected for a plurality of viewing directions; determining, based on the color of the sub-pixels detected for each viewing direction, grayscale levels required to reveal M images viewable through the lenticular array in the M viewing directions, respectively; and customizing the sub-pixel arrangement, during which the grayscale levels are engraved facing the sub-pixels in the carrier layer by focus of laser radiation through the lenses.
Resumen de: WO2024165548A1
There is provided a security element, comprising: an optic layer; a metallic layer; and a printed magnetic ink layer. The security element optionally comprises a photoluminescent layer. Also provided is a security document comprising the security element and a substrate, wherein the security element is surface applied, or partially or wholly embedded in the substrate. The security element may provide enhanced anti-counterfeiting protection to security documents such as banknotes.
Resumen de: US2024270009A1
The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the present invention provides security documents and decorative articles comprising one or more optical effect layers (OELs) and methods for producing said OELs, said OELs comprising magnetically oriented platelet-shaped magnetic or magnetizable pigment particles in an at least partially cured coating layer (x40)
Resumen de: AU2023264184A1
The invention relates to a printing machine for producing a security document (02). A counter printing cylinder (42) which guides a substrate (26) of the security document (02) and a transfer cylinder (43) which interacts with the counter printing cylinder (42) at a transfer location and which prints a printed image (27) onto the substrate (26) are provided, wherein the substrate (26) has at least one transparent window (04), and a micro-optical structure (03) consisting of microlenses (11) is provided on one face of the substrate (26) at least in the region of the transparent window (04) in question. The counter printing cylinder (42) and the transfer cylinder (43) are arranged so as to interact such that the micro-optical structure (03) consisting of microlenses (11) is arranged on one face of the substrate (26) at least in the region of the transparent window (04) in question and the at least one printed image (27) is arranged on the other substrate (26) face lying opposite the micro-optical structure (03) at least in the region of the transparent window (04). The printed image (27) in question has a plurality of image elements (28a to 28j) in a punctiform or linear pattern, each image element having a color which differs from white. A printing device is provided that applies a laminar expanded layer (39) which covers the printed image (27) in question onto at least one section of the printed image (27) in question on the printed image face facing away from the micro-optic
Nº publicación: WO2024165815A1 15/08/2024
Solicitante:
CYPHER SCIENCE [FR]
GLINCS [FR]
UNIV CLAUDE BERNARD LYON 1 [FR]
CENTRE NATIONAL DE LA RECHERCHE SCIENT [FR]
CYPHER SCIENCE,
GLINCS,
UNIVERSITE CLAUDE BERNARD LYON 1,
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Resumen de: WO2024165815A1
The invention relates to providing markers for identifying and/or authenticating objects, in particular valuable objects, and, more specifically, stable, effective, easily synthesised, economical, unforgeable markers that afford multiple, complex coding possibilities. The invention relates to particles (P), in particular particles suitable for marking, identifying and/or authenticating objects, in particular valuable objects, that are: - based on at least one polymer bearing chelating groups; - the largest dimension of which is between 0.1 and 1000 µm, preferably between 1 and 500 µm, even more preferably between 1 and 50 µm; and - to which are bonded at least one mineral marking element (M) and, optionally, at least one organic marking element (O); at least one portion of these one or more mineral marking elements (M) being chelated by the polymer. The invention also relates to a powder, a suspension or a composition comprising these particles P, and to a method for producing these particles.
BOPI
Sede Electrónica
