| 摘要 |
PURPOSE:To easily produce a photosensitive resin compsn. having water developability and high impact resilience by incorporating a specified resin, a photopolymerizable unsatd. monomer and a photopolymn. initiator. CONSTITUTION:This photosensitive resin compsn. contains a resin obtd. by allowing a polymer having carboxyl groups, >=30mgKOH/g acid value and >=30 deg.C glass transition temp. to react with a compd. having two isocyanato groups in one molecule and a compd. having two hydroxyl groups in one molecule, a photopolymerizable unsatd. monomer and a photopolymn. initiator. The polymer having carboxyl groups is produced by copolymerizing a monomer having a carboxyl group such as acrylic acid or methacrylic acid with an unsatd. monomer such as methacrylic ester. Since photopolymerizable double bonds are introduced into the polymer, the resultant resin also has photopolymerizable double bonds, a printed image is made clear and the swelling of a printing plate with ink can be suppressed. |
