| 摘要 |
PURPOSE:To obtain a photosensitive compsn. having satisfactory developability for aq. alkaline developing soln. and superior durability for printing by incorporating a water-insoluble and aq. alkali-soluble poly(urethane-urea)resin having carboxyl groups into the compsn. CONSTITUTION:The title photosensitive compsn. contains a water-insoluble and aq. alkali-soluble poly(urethane-urea)resin having carboxyl group. Also, a mixture of o-quinonediazide as a photosensitive compd., a negatively acting diazonium compd., a polymerizable monomer in combination with a photopolymn. initiator, or a mixture of a negatively active diazonium compd., a photopolymerizable monomer in combination with a photopolymn. initiator, etc. may be used for a photosensitive compsn. Therefore, either a positive photosensitive compsn. or a negative photosensitive compsn. can be obtd. Such compsn. has superior coatability when it is coated on a base. Moreover, the developability of the compsn. when its exposed part is developed with aq. alkaline developing soln. after coating, drying, and image exposing the composition is also superior. In addition, since a relief image has high abrasion resistance and high adhesion to a base, a great number of satisfactory printed matters can be obtd. when the compsn. is used for the prepn. of a printing form. |
