Photoinitiators for photopolymers

摘要

The present invention relates to novel photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer and a photoinitiator comprising a dye of formula (I).;;The present invention further relates to a holographic medium which contains a photopolymer formulation of the present invention or is obtainable by using same, to the use of a photopolymer formulation of the present invention for producing holographic media and also to a process for producing a holographic medium by using a photopolymer formulation of the present invention.

主权项

1. A photopolymer formulation comprising a polyol component, a polyisocyanate component, a writing monomer and a photoinitiator, wherein the photoinitiator contains a dye of general formula (I), wherein A represents N, E represents boron, and substituted with two halogen radicals or with one radical selected from oxygen and sulphur, and R1 and R3 each independently represent an optionally substituted aromatic radical, and R2 represent hydrogen, halogen, cyano, nitro, optionally fluorinated alkoxy or an optionally substituted aromatic, aliphatic or araliphatic radical.