[EN] NEW TRIAZINE AS PHOTO INITIATORS AND THEIR PREPARATION<br/>[FR] NOUVEAUX PHOTO-INITIATEURS EN TRIAZINE ET LEUR PRÉPARATION
申请人:COVESTRO DEUTSCHLAND AG
公开号:WO2016207161A1
公开(公告)日:2016-12-29
The present invention relates to new triazine photoinitiators, a new process for their preparation, and a photopolymer composition comprising a photopolymerizable component and the new triazine photoinitiators. Further aspects of the present invention are a photopolymer comprising said photopolymer composition, a holographic medium which comprises such a photopolymer, a hologram comprising the holographic medium, and a device such a display, chip card, security document, bank note and / or holographic optical element comprising said hologram.
Provided is a production method whereby corresponding carboxylic acid esters can be obtained from a variety of carboxylic acids at a high yield, even under conditions using a simple reaction operation and little catalyst and even if the amount of substrate used is theoretical. A production method for carboxylic acid ester, whereby a prescribed diester dicarbonate, carboxylic acid, and alcohol are reacted in the presence of at least one type of magnesium compound and at least one type of alkali metal compound.
AROMATIC GLYCOL ETHERS AS WRITING MONOMERS IN HOLOGRAPHIC PHOTOPOLYMER FORMULATIONS
申请人:COVESTRO DEUTSCHLAND AG
公开号:US20170045816A1
公开(公告)日:2017-02-16
The invention relates to a photopolymer formulation comprising specific aromatic glycol ethers as writing monomers, matrix polymers and a photoinitiator. The invention further provides an unexposed holographic medium obtainable using an inventive photopolymer formulation, and an exposed holographic medium obtainable by exposing a hologram into an inventive unexposed holographic medium. The invention likewise provides a visual display comprising an inventive exposed holographic medium, for the use of an inventive exposed holographic medium for production of chip cards, identification documents, 3D images, product protection labels, labels, banknotes or holographic optical elements, and specific aromatic glycol ethers.
[EN] PHOTOPOLYMER COMPRISING A NEW CLASS OF PHOTO INITIATOR<br/>[FR] PHOTOPOLYMÈRE COMPRENANT UNE NOUVELLE CLASSE DE PHOTO-INITIATEUR
申请人:COVESTRO DEUTSCHLAND AG
公开号:WO2016096639A1
公开(公告)日:2016-06-23
The present invention relates to photopolymer comprising a photopolymerizable component and a photo initiator system. Further aspects of the present invention are a holographic media which comprises such a photopolymer, a display which comprises such a holographic media and the use of such a holographic media to make chip cards, security documents, bank notes and / or holographic optical elements especially for displays.
cationic Ir-catalyzed tail-to-tail dimerization of aryl acrylates starting from vinylic sp2 C−H activation, which gives industrially useful adipic acid ester derivatives in high yields. We further expanded the reaction to an enantioselective dimerization using aryl methacrylates and achieved the first example of catalytic asymmetric dimerization of acrylate derivatives.
我们描述了从乙烯基sp 2 C-H 活化开始的阳离子 Ir 催化的丙烯酸芳基酯的尾对尾二聚反应,它以高产率提供工业上有用的己二酸酯衍生物。我们进一步将反应扩展到使用甲基丙烯酸芳基酯的对映选择性二聚,并实现了丙烯酸酯衍生物催化不对称二聚的第一个例子。