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AssigneeHoechst Aktiengesellschaft
InventorsJoachim Gersdorf, Matthias Kroggel, Karl-Josef Rauterkus
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A photocurable elastomeric mixture is described which comprises a compound which contains at least one terminal ethylenically unsaturated group and is polymerizable by free radical polymerization, a photopolymerization initiator and, as binder, a graft polymer which is soluble or dispersible in water or an aqueous solution, the graft base of which is a polymer of diol components and diisocyanate components having at least 2 urethane groups in the molecule, onto which polymer carboxylic acid vinyl ester units having 3 to 20 carbon atoms, or their saponification products, are grafted. The mixture is suitable for the production of relief printing plates, in particular flexographic printing plates, and can be developed with water or aqueous solutions.
A photocurable elastomeric mixture consisting essentially of:
A photocurable mixture as claimed in claim wherein said graft polymer has been saponified to the extent of about 70 to 99 mol %, based on the number of saponifiable monomer units.
Dependencies are inferred from the claim text.