| 摘要 |
PROBLEM TO BE SOLVED: To obtain a photosensitive resin compsn. for a printing plate which has higher resistance against water base ink, improved printing durability for flexographic printing, and low adhesion property of the surface for printing and can be developed with water. SOLUTION: This photosensitive resin compsn. contains a polymer having cationic groups and (meth)acryloyl groups in the side chains. Since this photosensitive resin compsn. contains (meth)acryloyl groups which can crosslink with the polymer when the compsn. is irradiated with light to form a crosslinked structure, the crosslinked structure thus formed is made dense compared to a polymer having no (meth)acryloyl group. Therefore, it is supposed that a water base ink hardly intrudes in the photosensitive resin compsn., which improves the resistance against water base ink, and as a result, durability against printing in flexographic printing can be improved. As for the polymer having cationic groups and (meth)acryloyl groups on the side chains as the component, addition polymers or condensed polymers can be used and addition polymers are preferable. |
