Photopolymerisable flexography elements with SIS/SBS mixtures as ligands for the preparation of flexographic printing plates

摘要

A photopolymerizable composition comprising at least one thermoplastic elastomer SIS-block copolymer is characterized in that it contains a SBS-block copolymer having a styrene content of 5-25 wt.% and a vinyl bond content of 30-65 %; a wt. ratio of SBS copolymer to SIS copolymer of 70/30-10/90; and 50-90 wt.% of the binding agent mixture comprises SIS- and SBS block copolymers. A photopolymerizable composition (I) comprising at least one thermoplastic elastomer SIS-block copolymer containing 5-25 wt.% styrene as binding agent, 4.9-30 wt.% of at least one ethylenically unsaturated monomer, 5-40 wt.% of a plasticizer and 0.1-5 wt.% of at least one photoinitiator or photoinitiator system is characterized in that it has a SBS-block copolymer having a styrene content of 5-25 wt.% and a vinyl bond content of 30-65 %; a wt. ratio of SBS copolymer to SIS copolymer of 70/30-10/90; and 50-90 wt.% of the binding agent mixture comprises SIS- and SBS block copolymers. An Independent claim is included for a photopolymerizable flexo-printing form comprising at least one dimensionally stable support layer and a layer comprising the composition (I).