PHOTO-POLYMERIZABLE COMPOSITION AND PRINTING PLATE PREPARED THEREFROM

摘要

A water-developable photo-polymerizable composition is disclosed, together with a printing plate prepared therefrom. The photo-polymerizable composition comprises a copolymer of an .alpha., .beta.-ethylenically unsaturated carboxylic acid and a vinyl monomer, a vinyl compound having a secondary or tertiary nitrogen atom, an ethylenically unsaturated monomeric compound, and a photoinitiator. Printing plates prepared from the composition are water-developable and also water-resistant following developing.