| 摘要 |
PURPOSE:To obtain the planographic printing plate having a high sensitivity and excellent printing resistance by incorporating a compd. of a specific mol. wt. each having 1 piece of photodimerizable unsatd. bonds and phosphinyl groups in the same molecule into the above-mentioned printing plate. CONSTITUTION:A photosensitive layer contg. the polymer having two pieces of the photodimerizable unsatd. bonds is provided on an aluminum base. The compd. of <=2,000mol.wt. each having 1 piece of the photodimerizable unsatd. bonds and the phosphinyl groups in the same molecule is incorporated therein. The representative functional groups contg. the photodimerizable unsatd. bonds are exemplified by a maleimide group, cinnamyl group, cinnamylidene group, chalcon group, etc. The planographic printing plate having the excellent printing performance while maintaining the excellent sensitivity of the photodimerizable photocrosslinkable material is obtd. in this way. |
