The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 2018
Filed:
Oct. 13, 2014
Covestro Deutschland Ag, Leverkusen, DE;
Horst Berneth, Leverkusen, DE;
Thomas Rölle, Leverkusen, DE;
Friedrich-Karl Bruder, Krefeld, DE;
Dennis Hönel, Zülpich-Wichterich, DE;
Marc-Stephan Weiser, Leverkusen, DE;
Thomas Fäcke, Leverkusen, DE;
Rainer Hagen, Leverkusen, DE;
Günther Walze, Leverkusen, DE;
Covestro Deutschland AG, Leverkusen, DE;
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.