| 摘要 |
PURPOSE:To enable the UV ink printing of the titled plate, without carrying out a burning treatment by using o-naphthoquinone-diazido sulfonic acid ester of polyhydroxy benzophenone for a photosensitive affording agent. CONSTITUTION:The photosensitive layer contains the o-naphthoquinone diazido sulfonic acid ester of polyhydroxy benzophenone and a high polymer having a structural unit shown by formula I. In the formula, R1 and R2 are each hydrogen, halogen atom, alkyl, aryl or carboxylic acid group, R3 is hydrogen, halogen atom, alkyl or aryl group, R4 is hydrogen atom, alkyl, aryl or aralkyl group, Y is an aromatic group which may be substd, X is a bivalent org. group capable of bonding nitrogen atom with carbon atom of the aromatic group, (n) is an integer of 0-5. The obtd. titled plate has the good anti-UV ink aptitude, developing latitude, ball pen aptitude and antichemical property. |
