| 摘要 |
<p>A liquid photosensitive resin composition for producing a flexographic plate, which consists essentially of (1) 100 parts by weight of an unsaturated polyurethane prepolymer having a number average molecular weight of 1,000 to 30,000, which has at least one polymerizable ethylenic double bond per one molecule at the terminal thereof, and contains as a segment thereof a hydrogenated 1,2-polybutadiene having a hydrogenation degree of not lower than 50 %, (2) 5 to 100 parts by weight of an ethylenically unsaturated monomer based upon 100 parts by weight of the prepolymer, and (3) 0.01 to 10 wt. % of a photopolymerization initiator and (4) 1.0 to 5.0 wt. % of cetyl alcohol, respectively based upon the total amount of the prepolymer and the ethylenically unsaturated monomer. Using the liquid photosensitive resin composition of the present invention, improvements in removal of tackiness on the surface of the printing plate obtained therefrom, and retaining of fluidity of the liquid resin composition can be simultaneously attained, and further improvements in developing property, and peeling-off property of a cover film, are exhibited, and therefore excellent workability for preparing a printing plate can be attained.</p> |
