Patent ID: 7235346

Claim:
A photosensitive flexographic printing element for the production of flexographic newspaper printing plates, comprising—applied one on top of the other—at least a flexible, metallic support, an adhesive layer applied thereto, a photopolymerizable layer which can be developed in organic media and which itself comprises at least one elastomeric binder, ethylenically unsaturated monomers, a photoinitiator or photoinitiator system and a plasticizer, a layer which can be imaged digitally, and optionally a removable protective film, wherein the total thickness of the flexographic printing element is from 300 to 1000 μm, the elastomeric binder is an SBS block copolymer which has a styrene content of from 20 to 50% by weight, which is optionally partially or fully hydrogenated, and which has a weight average molecular weight M w of from 80,000 to 150,000 g/mol and a Shore A hardness of from 50 to 80, and the amount of plasticizer is from 10 to 40% by weight, based on the amount of all constituents of the photopolymerizable layer.