SECURITY ELEMENT HAVING VOLUME HOLOGRAM AND PRINTED FEATURE
申请人:BAYER MATERIALSCIENCE AG
公开号:US20150353485A1
公开(公告)日:2015-12-10
The invention relates to a method for producing a security element having a holographic layer in which a hologram is arranged, characterized by at least the following steps: a) providing the holographic layer; b) exposing the holographic layer at least in sections via a master hologram to produce a hologram copy in the holographic layer; e) printing the holographic layer at least in sections with an ink, forming a printed feature, wherein the ink comprises the melt of a dye or a colorless component or a solvent and a dye dissolved therein or a colorless component dissolved therein; d) fixing the exposed holographic layer to produce the hologram in the holographic layer, wherein the printed feature and the hologram are arranged in the holographic layer such that the printed feature and the hologram overlap at least in sections. The invention further relates to a security feature which is produced or can be produced by said method.
PHOTOPOLYMER FORMULATION FOR PRODUCTION OF HOLOGRAPHIC MEDIA COMPRISING BORATES WITH LOW TG
申请人:COVESTRO DEUTSCHLAND AG
公开号:US20160252808A1
公开(公告)日:2016-09-01
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-Formulierung zur Herstellung holographischer Medien mit hoch vernetzten Matrixpolymeren
申请人:Bayer MaterialScience AG
公开号:EP2450893A1
公开(公告)日:2012-05-09
Die Erfindung betrifft eine Photopolymer-Formulierung umfassend eine Polyol-Komponente, eine Polyisocyanat-Komponente, ein Schreibmonomer und einen Photoinitiator, enthaltend einen Coinitiator und einen Farbstoff der Formel F+An-, in der F+ für einen kationischen Farbstoff und An- für ein Anion steht, wobei der Farbstoff der Formel F+An- eine Wasseraufnahme von ≤ 5 % aufweist. Weitere Gegenstände der Erfindung sind ein holgraphisches Medium, insbesondere in der Form eines Films, enthaltend eine erfindungsgemäße Photopolymer-Formulierung, die Verwendung eines derartigen Mediums zur Aufzeichnung von Holgrammen sowie ein spezieller in den erfindungsgemäßen Photopolymer-Formulierungen verwendbarer Farbstoff.
Photopolymer formulation for production of holographic media comprising borates with low TG
申请人:Covestro Deutschland AG
公开号:US10001703B2
公开(公告)日:2018-06-19
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.