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:
Oct. 31, 2017
Filed:
Dec. 16, 2014
Covestro Deutschland Ag, Leverkusen, DE;
Thomas Rölle, Leverkusen, DE;
Horst Berneth, Leverkusen, DE;
Friedrich-Karl Bruder, Krefeld, DE;
Dennis Hönel, Zülpich-Wichterich, DE;
Thomas Fäcke, Leverkusen, DE;
Günther Walze, Leverkusen, DE;
Rainer Hagen, Leverkusen, DE;
Christian Diedrich, Düsseldorf, DE;
Covestro Deutschland AG, Leverkusen, DE;
Abstract
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.