SYNTHESIS OF PHOTOSENSITIVE COMPOUND, PHOTOSENSITIVE COMPOSITION AND PHOTOSENSITIVE OFFSET PRINTING PLATE

摘要

PROBLEM TO BE SOLVED: To obtain a photosensitive compound having improved preservability by carrying out sulfone esterification reaction of a compound having plural hydroxyl groups in the molecule with a specific compound in a specific mixed solvent. ;SOLUTION: A photosensitive compound is produced by the sulfone esterification reaction of (A) a compound having plural hydroxyl groups in the molecule (e.g. cresol/formaldehyde polycondensation product) with (B) a compound of formula I (R¹ to R⁴ are each H, methyl, ethyl, n-propyl, isopropyl, methoxy, n-propoxy or the like) or formula II (R⁵ to R⁸ are each H, methyl, ethyl, n-propyl, isopropyl, methoxy, n-propoxy or the like) (e.g. 1,2- naphthoquinone-2-diazido-5-sulfonic acid chloride) in (C) a mixed solvent obtained by mixing (i) an organic solvent having an SP value of ≤9.8 (e.g. tetrahydrofuran) with (ii) an organic solvent having an SP value of ≥10.2 (e.g. dimethyl sulfoxide).;COPYRIGHT: (C)1999,JPO